• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a swing load (1) and a test stand (17) for vibration testing a shaft (2) and a method for releasably anchoring the swing load (1) on the shaft (2), which swing load (1) is a load element (3). for the engagement of at least one vibration exciter (20), wherein the load element (3) has a cylindrical opening (4) in which a ring (5) with conical opening (6) for releasably anchoring to an equally conical shaft end (7) of Shaft (2) is received, and wherein the ring (5) on each axial side of the conical opening (6) has a circumferential sealing ring (8) for sealing against the conical shaft end (7) and at least one externally fed, between the two sealing rings ( 8) in the conical opening (6) opening lubricant nozzle (10).
    公开号:AT518412A4
    申请号:T50520/2016
    申请日:2016-06-07
    公开日:2017-10-15
    发明作者:Ing Ernst Gschweitl Dipl
    申请人:Prisma Eng Maschinen- Und Motorentechnik Gmbh；
    IPC主号:
    专利说明:

    Prisma Engineering Maschinen- und Motorentechnik GmbH A-8041 Graz
    The present invention relates to a vibration load for vibration testing of a shaft, comprising a load element for the attack of at least one vibration exciter. The invention further relates to a test rig for vibration testing with at least one oscillatory load according to the invention and to a method for releasably anchoring the oscillatory load on the shaft.
    Shafts for drives and motors, e.g. Drives, crankshafts, camshafts or the like, are at least temporarily exposed to high loads and are therefore for the proof of their resistance, for approval purposes and / or for scientific investigations of intensive tests, e.g. Strength tests, subjected. For strength testing, a shaft to be tested - or a part thereof, e.g. a crank of a crankshaft - clamped on one side, for example, on a test stand for vibration testing and attached to its other shaft end a swing load, or the shaft is centrally supported on the test bench and anchored at each end of each shaft a swing load. At each swing load, a vibrator, e.g. an unbalance motor or several synchronized unbalance motors. The vibration exciter burdened together with the swing load the shaft in a predetermined direction of vibration, amplitude and / or frequency by meh rere million or several tens of millions of load cycles through bending and / or torsion usually to the destruction of the shaft.
    Due to the very high forces or moments occurring during the vibration load testing, in particular large waves, the anchoring of the vibrating load (s) on the shaft is of particular importance: on the one hand, it must be particularly resistant and, on the other hand, detachable from the tested shaft after the test. For the vibration testing of shafts with small and medium diameter or low strength, it is known to build the swing load of two halves, which are placed around the shaft and screwed against each other, thereby clamping the shaft in the manner of a clamping ring. For larger waves, e.g. Shafts for marine propulsion with diameters of up to several hundred millimeters, and the high forces or moments occurring during their vibration test such anchoring unsuitable, since it comes to an unfavorable distribution of mechanical stresses in the vibrating halves and in the shaft and they occurring load does not withstand permanently.
    The invention has for its object to provide a swing load and a test rig for vibration testing of a shaft and a method for releasably anchoring the swing load on a shaft, which are simple and inexpensive and even at very high forces and / or moments during the vibra tion test one safe and yet releasable anchoring of the swing load at the shaft end of the shaft to be tested allow.
    This object is achieved according to a first aspect of the invention with a swinging load of the aforementioned type, which is characterized in that the load element has a cylindrical opening in which a conical opening ring for releasably anchoring to a likewise conical shaft end of the shaft is, wherein the ring on each axial side of the conical opening comprises a circumferential sealing ring for sealing against the conical shaft end and at least one externally fed, between the two sealing rings in the conical opening opening lubricant nozzle.
    The division of the swing load into a load element and a ring received in its cylindrical opening enables the largely independent optimization of these two components on the respectively perceived by them, mutually different functions. So the swing load can be both inexpensive and simple in construction and yet meet the high demands on safety and durability of anchoring to the shaft. The anchoring is effected in particular by the interaction of the conical shaft end and the conical opening of the ring, which causes a uniform, symmetrical stress distribution and thus material stress in all parts. Further, by using lubricant introduced at high pressure through the lubricant nozzle when sliding the vibration load onto the conical shaft end, cold welding of the surfaces to each other can be avoided so that anchoring of the vibration load to the shaft remains solvable.
    Particularly simple and inexpensive to build up the swing load when the load element is a vibrating plate made of structural steel.
    To meet the high stability requirements, the ring is preferably made of high-quality steel. By "high-tempered" in this context steels with a yield strength of about 1200 N / mm2 or higher are to be understood.
    It is particularly advantageous if the ring, as long as it is not anchored to the shaft end, is received with clearance fit in the cylindrical opening. As a result, load element and ring are easy to manufacture and assemble. Nevertheless, the load element sits securely on the ring and thus on the shaft, since the ring is so far elastically stretched when anchoring on the shaft end by the conicity that the clearance in the cylindrical opening of the load element is an interference fit. Despite the therefore in comparison to the ring lower mechanical stresses in the load element whose secure fit is ensured due to the larger diameter of the cylindrical opening compared to the conical opening.
    In order to ensure a secure and durable anchoring of the oscillatory load on the conical shaft end, it is advantageous if the conical opening has a taper between about 1:10 and about 1: 100, preferably between about 1:20 and about 1:60, more preferably about 1:30 has. For example, an inner peripheral groove could be provided in the conical opening for the sealing rings. On the other hand, in order to enable a simple construction and consequently a simpler manufacture of the ring, it is favorable for the ring to have an inner shoulder on each axial side of the conical opening, in each of which a sealing ring is accommodated.
    According to a preferred embodiment, each sealing ring in the direction of the ring center has an acute-angled edge for tangential contact with the conical shaft end. Due to the very small, almost linear bearing surface of the sealing ring on the conical shaft end, the sealing ring achieves a particularly good sealing effect even at high pressure of the lubricant.
    It is particularly advantageous if in the ring also distributed over its circumference spring elements are mounted, of which each sealing ring is subjected to force in the direction of the ring center. Alternatively, it is advantageous if, between the inner shoulder and the sealing ring, furthermore, wedges distributed over the circumference thereof are axially inserted, of which the sealing ring is subjected to a force in the direction of the ring center. By applying force in such a direction by means of the distributed over the circumference spring elements or wedges results in a very uniform sealing effect.
    In order to be able to solve a particularly strong anchoring of the swing load on the shaft, it is also advantageous if the ring comprises at least one further externally feedable, opening into the cylindrical opening lubricant nozzle. Such a further lubricant nozzle makes advantageous advantage of the radial two-part nature of the oscillating load according to the invention: Thus, when removing the oscillating load from the shaft, the load element can first be removed from the ring to relieve it, so that the ring itself can later be more easily removed from the shaft end.
    According to a second aspect, the invention provides a test rig for vibration testing a shaft, which comprises a support of a shaft and is characterized in that it has at least one swing load of the aforementioned type, a drive for axially sliding the swing load with the conical opening on a conical shaft end Shaft, a connected to the lubricant nozzle of the ring lubricant pump and at least one vibration exciter for the attack on the load element comprises. With regard to the advantages of the test stand, reference is made to the above statements on the vibrational load.
    In this case, preferably not only a swing load for a shaft end, but a separate swing load is provided for each of the two shaft ends of the shaft. In this way, on the one hand, the support of the shaft, e.g. in the shaft center, particularly easy and on the other hand a synchronous arousal of the
    Oscillating loads at the two shaft ends - if necessary, in each case the same - possible, so that when vibration testing compared to a single swing load a much higher force or a much higher torque can be impressed on the shaft.
    It is particularly favorable when the named drive comprises a spindle drive and in each case a hydraulic nut for each oscillatory load. The spindle drive allows a rapid, if necessary, both sides, pushing the swing load (s) at least until the sealing rings are tight against the conical shaft end, whereupon each swing load of the respective hydraulic nut with a particularly high force acting on the shaft end can be further postponed, so that a tight fit of the swing load (s) on the shaft results. The spindle drive can act on the respective swing load via the hydraulic nut (s).
    According to a third aspect, the invention provides a method for releasably anchoring a swinging load of the aforesaid kind to a shaft with a conical shaft end, comprising the steps of: axially sliding the swinging load with the conical opening onto the conical shaft end, at least until the sealing rings sealingly abut the conical shaft end ;
    Pressurizing the gap formed between the shaft end, the conical opening and the two sealing rings with lubricant through the lubricant nozzle; further pushing the swing load onto the shaft end until the swing load reaches a predetermined clamp fit on the shaft end; and
    Stop the pressurization and drain the lubricant from the gap.
    For releasing the anchoring, in particular after a vibration test, the method preferably comprises the further steps:
    Pressurizing the gap with lubricant;
    Pulling the swing load from the shaft as long as the sealing rings abut the conical shaft end;
    Terminating the pressurization and draining the lubricant from the gap formed between the shaft end and the conical opening; and further subtracting the swing load from the shaft end.
    By pressurizing the gap with lubricant under high pressure, the removal of the swing load and the shaft is greatly simplified. The swing load is thus often reusable, even if the shaft was destroyed in the course of vibration testing.
    With regard to the further advantages and further embodiments of the method, reference is made to the preceding comments on the swing load and the test bench.
    The invention will be explained in more detail with reference to an embodiment shown in the accompanying drawings. In the drawings show:
    Figure 1 is a swing load according to the invention, which is anchored to a conical shaft end of a crankshaft, in a section along the section line I-I of Fig. 2.
    FIG. 2 shows the oscillating load of FIG. 1 in a side view in the axial direction of the shaft; FIG.
    Fig. 3 shows the detail A of Figure 1 on an enlarged scale.
    4 shows a schematic example of a test stand for vibration testing of a shaft with two oscillating loads according to FIGS. 1 to 3 in front view; and FIGS. 5a to 5c show the detail B of the test bed of FIG. 4 before pushing on the oscillating load of FIG. 1 on the conical shaft end (FIG. 5a), in an incompletely pushed-on position (FIG. 5b) and in a complete one pushed-up, anchored position (Fig. 5c), each in a section along the axial direction of the shaft.
    1 to 3 show an example of a swing load 1 for vibration testing of a shaft 2 - here: a crankshaft 2 and a single crank thereof. The swinging load 1 comprises a load element 3, which in the present example is a rectangular swinging plate made of structural steel (FIG. 2). The load element 3 has a cylindrical opening 4, in which a ring 5 is received. In the present example, the ring 5 is made of high-grade steel, i. Steel with a yield strength of about 1200 N / mm2 or higher.
    The ring 5 has a conical opening 6, in which a shaft end 7 of the shaft 2 is releasably anchored. The conical
    Shaft end 7 is on the shaft 2, e.g. formed by turning or milling the shaft 2, or - as in the example of FIG. 1 - forged on the crank of the crankshaft. At each axial side of the conical opening 6, the ring 5 has a circumferential sealing ring 8 (FIG. 3). The sealing rings 8 seal a gap 9 formed between the conical shaft end 7 and the conical opening 6. The ring 5 further has at least one between the two sealing rings 8 in the conical opening 6, i. into the gap 9, opening lubricant nozzle 10. As will be explained in detail below, the lubricant nozzle 10 is fed from the outside.
    In the example of Fig. 1, the load element 3 is a swing plate of about 2000 mm x 2400 mm with a thickness of about 200 mm; the (average) diameter di of the conical opening is about 500 mm and the diameter d2 of the cylindrical opening about 740 mm. It will be appreciated that the swinging load 1 may have other suitable dimensions as required and the load element 3 need not be a plate, in particular a rectangular swinging plate, but may be e.g. circular or o-vale oscillating plate or in any case e.g. may be formed lever-shaped and may consist of a suitable other material than structural steel. Also load element 3, ring 5 and in particular shaft end 7 in the anchored state of the swing load 1 on the shaft 2 need not necessarily be flush with each other, but may have different extensions in the axial direction.
    The ring 5 could be received with a press fit in the cylindrical opening 4 of the load element 3. In the present example, however, the ring 5 is received with clearance fit in the cylindrical opening 4, as long as it is not anchored to the shaft end 7. This still results in a press fit of the ring 5 in the cylindrical opening 4, when the ring 5 is radially stretched due to the anchoring and the conicity of the opening 6 and shaft end 7; Thus, the highly tempered ring 5 carries the majority of the mechanical stresses due to the anchoring, at the same time the load element 3 is securely connected to the ring 5.
    The conicity of the conical opening 6, and at the same time of the shaft end 7, is between about 1:10 and 1: 100, depending on the forces or moments during vibration testing and consequently as a function of the diameter d3, shape and material of the shaft 2 to be tested. preferably between about 1:20 and 1:60, more preferably at about 1:30, resulting in a pitch angle φ of eg about 0.5 ° to about 6 ° results.
    According to FIG. 3, the ring 5 has on each axial side of the conical opening 6 an inner shoulder 11, in which in each case a sealing ring 8 is accommodated. Alternatively, the sealing ring 8 could, for example, be accommodated in an inner peripheral groove (not shown) which runs in each case in the conical opening 6.
    The sealing ring 8 has shown in FIG. 3 in the direction of the ring center, i. towards the gap 9, an acute-angled edge 12 for tangential contact with the conical shaft end 7, resulting in a particularly small bearing surface and consequently a high sealing action thereon and on the inner shoulder 11. Alternatively or additionally, the sealing ring 8 could e.g. two or more sealing lips executed stages for tangential contact with the conical shaft end 7 and / or on the inner shoulder 11 have.
    In the ring 5 are distributed over its circumference optionally distributed spring elements 13, of which each sealing ring 8 is subjected to force in the direction of the ring center. Each spring element 13 could be e.g. sitting in a blind bore (not shown) or fixed in a bore 14 by means of a countersunk screw 15 and be biased by the countersunk screw 15 relative to the respective sealing ring 8. For evenly biasing the sealing rings 8, a plurality of bores 14 with spring elements 13 and countersunk screws 15 are distributed over the circumference of the ring 5, for example, as shown in Fig. 2, 36 holes 14 or even more.
    Alternatively, the seal ring 8 could also be otherwise biased in the direction of the ring center, e.g. by a plurality of distributed over the circumference of the sealing ring 8, between the inner shoulder 11 and sealing ring 8 axially inserted wedges od. Like.
    Optionally, the ring 5 also has at least one further lubricant nozzle 16 which opens into the cylindrical opening 4 and, like the lubricant nozzle 10 opening into the conical opening 6, is fed from the outside. It is understood that instead of just one respective lubricant nozzle 10, 16, a plurality of lubricant nozzles 10, 16 can be distributed over the circumference of the cylindrical or conical opening 4, 6.
    According to FIG. 4, the oscillating load 1 of FIGS. 1 to 3 is used on a test stand 17 for the vibration testing of a shaft 2-in this example again a crankshaft or a section thereof with one or more heads. Said swing load 1 is particularly suitable for the swing load test at very high forces or moments, as described e.g. occur in the vibration test of drive and / or crankshaft 2 large marine propulsion. Such shafts 2 have a diameter d3 of typically several hundred millimeters, the engines up to 20 cylinders, the waves on the test bench 17 are destructively tested in often several million or even several 10 million load cycles. In particular, in the case of vibration testing of crankshafts, often only a single or a few heads of the crankshaft are removed and used for vibration testing, e.g. by forging a conical end or machining the shaft ends to obtain the desired conicity. A temporarily stable anchoring of the swinging loads 1 at the respective shaft ends 7 is a prerequisite for the vibration test. For this purpose, the shaft to be tested 2 can be clamped on one side of the test stand and anchored only at the opposite end of the shaft 7 a swing load 1; In most cases, especially in torsional vibration testing, however, at each of the two
    Shaft ends 7 of the test shaft 2 anchored its own swing load 1.
    The test stand 17 comprises a support 18 for the shaft 2, in the example of FIG. 4 a central support 18. Further, the test stand 17 comprises at least one swing load 1 for a shaft end 7, a drive 19 for axially pushing the swing load 1 with the conical opening 6 on the conical shaft end 7 of the shaft 2 and at least one vibration exciter 20 for the attack on the load element. 3
    In the example of Fig. 4 at each shaft end 7 of the shaft 2 each have a swing load 1 is prepared for anchoring. At each of the swinging loads 1, two unbalance motors are fixedly mounted as vibration exciter 20, the run of which is tuned to one another during vibration testing and to the requirements. Alternatively, other vibration exciters 20 or only one or more unbalance motors can be mounted on the swing load 1 or attack it, as is known in the art.
    The test stand 17 further includes a lubricant pump 21, which is connected to the at least one lubricant nozzle 10 of the ring 5 and feeds them. In the case of two swinging loads 1, the lubricant pump 21 may be connected to the lubricant nozzles 10 of both swinging loads 1, or it may be provided for each swing load 1, a separate lubricant pump 21.
    The manner in which a swinging load 1 is anchored releasably to a shaft 2 will be described below with reference to FIGS. 4 and 5a to 5c.
    To prepare for anchoring, the shaft 2 is fixed to the shaft support 18 and, if necessary, e.g. aligned with their help radially and axially on the test bench 17. Alternatively or additionally, the respective swing load 1 can be radially and / or axially aligned to allow the following anchoring.
    The state before releasably anchoring the swinging load 1 on the shaft 2 is shown in FIG. 5a. For releasably anchoring the swinging load 1 is first pushed axially with the conical opening 6 on the conical shaft end 7 of the shaft 2, at least until the sealing rings 8 at the conical shaft end 7 sealingly abut gene (Fig. 5b). For this purpose, the drive 19, as shown schematically in Fig. 4, a spindle drive 22 with e.g. have two or four spindles 23, one of which is driven directly by a motor 24 and the other by means of e.g. a belt 25 are towed. The spindles 23 drive two side walls 26 of the test bed 17, on which the swinging loads 1 are kept loose.
    Then, the gap 9 formed between the shaft end 7, the conical opening 6 and the two sealing rings 8 is pressurized by means of the lubricant pump 21 via the lubricant nozzle 10 with lubricant. The lubricant pressure is several hundred to several thousand bar.
    Now, the sliding on the lubricant in the gap 9 swing load 1 is further pushed onto the shaft end 7 until the swing load 1 reaches a predetermined clamping fit on the shaft end 7. For this further pushing the spindle drive 22 could be used again with a suitable design. In the example of FIGS. 4 and 5a to 5c, however, the test stand 17 has, for each swing load 1, a respective hydraulic nut 27, which is supported on the respective side wall 26 and carries on with the aid of a hydraulic pump 28 further pushing in the axial direction. The hydraulic nut 27 engages the ring 5 and presses it as it were on the conical shaft end 7, wherein the ring 5 radially expands and rests on the one hand as the basis for its secure anchoring under high radial stress at the shaft end 7 and on the other hand a tight interference fit in the load element. 3 obtained. It is understood that instead of the spindle drive 22 and / or the hydraulic nut (s) 27, other suitable linear drives could be used in each case.
    Fig. 5c shows the said reaching the predetermined clamping seat of the swing load 1 on the shaft end 7. The clamping seat can be determined by a position of the ring 5 at the shaft end 7 and / or by a pressure of the hydraulic pump 28.
    Upon reaching the predetermined clamping seat, the pressurization of the lubricant nozzle is stopped and the lubricant from the gap 9, e.g. via a valve (not illustrated sets), drained, so that the swing load 1 is securely anchored to the shaft 2.
    Thereafter, the hydraulic nut 27 can be retracted to its original position to have sufficient clearance against the swing load 1 for the following vibration test. The test bench 17 is now ready for vibration testing.
    In order to release the swinging load 1 after vibration testing again from the anchorage to the shaft 2, first the gap 9 is pressurized via the lubricant nozzle 10 with lubricant to then deduct the swing load 1 of the shaft 2, as long as the sealing rings 8 at the conical shaft end. 7 issue. Then, the pressurization with lubricant is stopped and the lubricant is discharged from the gap 9 formed between the shaft end 7 and the conical opening 6. After that, the swing load 1 can be deducted from the shaft end, and thus completely.
    If the ring 5 comprises the said further lubricant nozzle 16 which opens into the cylindrical opening 4, then optionally, in order to facilitate the release of the anchoring of the swinging load 1 on the shaft 2, the cylindrical opening 4 can be passed through this further lubricant nozzle 16, e.g. with the help of the lubricant pump 21 or a separate lubricant pump, pressurized and first the load element 3 are deducted from the ring 5, so that the ring 5 is not further biased in the radial direction to the outside, whereupon the removal of the
    Rings 5 of the shaft 2 according to the method described above is simpler.
    The invention is not limited to the illustrated embodiments, but includes all variants, modifications, and combinations that fall within the scope of the appended claims.
    权利要求:
    Claims (16)
    [1]
    1. oscillatory load for vibration testing of a shaft, comprising a load element (3) for the attack of at least one vibration exciter (20), characterized in that the load element (3) has a cylindrical opening (4), in which a ring (5) with conical Opening (6) for releasably anchoring to a likewise conical shaft end (7) of the shaft (2) is received, wherein the ring (5) on each axial side of the conical opening (6) has a circumferential sealing ring (8) for sealing against the conical shaft end (7) and at least one externally fed, between the two sealing rings (8) into the conical opening (6) opens out lubricant nozzle (10).
    [2]
    2. swing load according to claim 1, characterized in that the load element (3) is a vibrating plate made of structural steel.
    [3]
    3. swing load according to claim 1 or 2, characterized in that the ring (5) is made of high-quality steel.
    [4]
    4. swinging load according to one of claims 1 to 3, characterized in that the ring (5), as long as it is not anchored to the shaft end (7) is received with clearance in the cylindrical opening (4).
    [5]
    5. oscillatory load according to one of claims 1 to 4, characterized in that the conical opening (6) has a taper between about 1:10 and about 1: 100, preferably between about 1:20 and about 1:60, more preferably about 1 : 30 has.
    [6]
    6. swinging load according to one of claims 1 to 5, characterized in that the ring (5) on each axial side of the conical opening (6) has an inner shoulder (11), in which in each case a sealing ring (8) is accommodated.
    [7]
    7. Vibration load according to one of claims 1 to 6, characterized in that each sealing ring (8) in the direction of the ring center has an acute-angled edge (12) for tangential contact with the conical shaft end (7).
    [8]
    8. oscillating load according to one of claims 1 to 7, characterized in that in the ring (5) also distributed over its circumference spring elements (13) are mounted, of which each sealing ring (8) is subjected to force in the direction of the ring center.
    [9]
    9. oscillating load according to one of claims 1 to 7, characterized in that between the inner shoulder (11) and sealing ring (8) also distributed over the circumference of its wedges are axially inserted, of which the sealing ring (8) is subjected to force in the direction of the ring center.
    [10]
    10. Vibration load according to one of claims 1 to 9, characterized in that the ring (5) comprises at least one further externally fed, in the cylindrical opening (4) opening lubricant nozzle (16).
    [11]
    11. Test bench for vibration testing of a shaft comprising a support (18) for the shaft (2), characterized in that the test stand (17) at least one swing load (1) according to one of claims 1 to 10, a drive (19) for axially sliding the oscillating load (1) with the conical opening (6) onto a conical shaft end (7) of the shaft (2), a lubricant pump (21) connected to the lubricant nozzle (10) of the ring (5) and at least one vibration exciter (20 ) for the attack on the load element (3).
    [12]
    12. Test stand according to claim 11, characterized in that for each of the two shaft ends (7) of the shaft (2) has its own swing load (1) is provided.
    [13]
    13. A test stand according to claim 11 or 12, characterized in that said drive (19 a spindle drive (22) and for each swing load (1) each comprise a hydraulic nut (27).
    [14]
    14. A method for releasably anchoring a swinging load (1) according to one of claims 1 to 10 on a shaft (2) with conical shaft end (7), comprising the steps: axial sliding of the swing load (1) with the conical opening (6) the conical shaft end (7), at least until the sealing rings (8) sealingly abut the conical shaft end (7); Pressurizing the gap (9) formed between the shaft end (7), the conical opening (6) and the two sealing rings (8) with lubricant via the lubricant nozzle (10); Continue pushing the swinging load (1) onto the shaft end (7) until the swinging load (1) reaches a predetermined clamping fit on the shaft end (7); and stopping the pressurization and draining the lubricant from the gap (9).
    [15]
    15. The method of claim 14, comprising the further steps of: pressurizing the gap (9) with lubricant; Pulling the swinging load (1) off the shaft (2), as long as the sealing rings (8) abut the conical shaft end (7); Terminating the pressurization and draining the lubricant from the gap (9) formed between the shaft end (7) and the conical opening (6); and further subtracting the swing load (1) from the shaft end (7).
    [16]
    16. The method of claim 14 or 15 for a test stand (17) with a spindle drive (22), a lubricant pump (21) and at least one hydraulic nut (27), said axial pushing by means of the spindle drive (22), said Applying pressure by means of the lubricant pump (21) and said further pushing on by means of the at least one hydraulic nut (27).
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    同族专利:
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    EP2833119B1|2012-03-31|2017-03-01|China University Of Mining & Technology |Dynamics performance testing system|
    EP2927660B1|2014-04-04|2016-10-12|Prisma Engineering Maschinen- und Motorentechnik GmbH|Device for testing rotary test samples under load|AT521658B1|2018-08-21|2020-12-15|Prisma Eng Maschinen Und Motorentechnik Gmbh|Vibration load for vibration testing of a shaft|
    法律状态:
    2021-12-15| PC| Change of the owner|Owner name: PRISMA ENGINEERING MASCHINEN- UND MOTORENTECHN, AT Effective date: 20211103 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50520/2016A|AT518412B1|2016-06-07|2016-06-07|Vibration load, test bench for vibration testing and method therefor|ATA50520/2016A| AT518412B1|2016-06-07|2016-06-07|Vibration load, test bench for vibration testing and method therefor|
    EP17159772.7A| EP3255403B1|2016-06-07|2017-03-08|Vibration load, test bench for vibration testing and method for same|
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