• 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:
    In a so-called cantilever scroll fluidics machine, to provide a scroll fluidics machine which can suppress the generation of an overturning moment which acts around a center of a crank pin mechanism, the present invention provides a cantilevered scroll fluidics machine including a scroll member attached to a housing; an orbiting scroll member configured to engage the fixed scroll member as it rotates to thereby movably form a compression space; a drive shaft configured to support the scroll member in orbit via an eccentric shaft; and a crankpin mechanism configured to support the orbiting scroll member so as to prevent the orbiting scroll member from rotating on its own axis. The crank pin mechanism includes a first shaft rotatably supported by the attached scroll member; a second shaft rotatably supported by the orbiting volute member and eccentric to the first shaft, wherein the first shaft attached to the attached scroll member extends in a thrust direction of a compression space which is formed by the fixed scroll member and the orbiting scroll member.
    公开号:BE1022522B1
    申请号:E2014/0209
    申请日:2014-03-27
    公开日:2016-05-19
    发明作者:Toshihiro Homma；Toru Sato；Tamotsu Fujioka；Junichi Asami
    申请人:Anest Iwata Corporation；
    IPC主号:
    专利说明:

    Fixed volute element and fluidic scroll machine using this
    Background of the invention
    The present invention relates to a fixed scroll member and a scroll fluidic machine that utilizes the fixed scroll member. The invention particularly relates to a fixed scroll member and a scroll fluidic machine that utilizes the fixed scroll member, which fixed scroll member has a configuration capable of suppressing the occurrence of a harmful rollover moment that is specific to a scroll. fluidic machine with cantilevered scrolls.
    Traditionally, in this type of scroll fluidic machine in order to reduce the dimensions, the center of a base circle of a spiral element (a cover) of a volute in orbit deviates from the center of a plate. end of this volute in orbit.
    Furthermore, in scrolled fluidic machines, there is a said cantilevered fluidic machine, in which an eccentric shaft portion of a crankshaft which drives a volute into orbit, supports the volute in orbit in cantilever via a bearing element.
    In addition, in a volute in traditional orbit as represented for example in Japanese Open Publication No. 2012-102 614 (Patent 1), the center of a base circle of a cover deviates outwardly from a position inside which is located 180 ° inside a side ending in a winding to a side starting with a winding of the lap of the center of an end plate of the volute in orbit so that a distance between a face end of the end of the lap and an outer circumferential end face of the end plate becomes almost equal to a distance between an outer surface of the lap in a position which is 180 ° to interior of the end-winding side to the side beginning with the cover winding and the outer circumferential end face of the end plate (see Figure 6 of Patent 1 ).
    In the configuration described above, although the point of application of a detachment force generated by a pressure of gas produced in a compression chamber to the volute in orbit deviates from the center of the end plate, the point d application of a pressing force in a high-pressure working chamber which presses the volute into orbit against a fixed volute does not coincide with the center of the end plate, and therefore a so-called reversal moment is generated in the scroll in orbit (see Figure 4 of Patent 1).
    As a result, the area of the high pressure working chamber must be increased to provide a pressing force that can prevent the volute in orbit from being detached from the fixed volute by overcoming the overturning moment, thereby causing the problem of increased slip loss.
    Here, a loading reaction force that results from a compression load acts on an eccentric shaft portion of a crankshaft, whereby the crankshaft deflects to be deformed. This results in an uneven contact phenomenon near both ends of the main bearing portion. In particular, a larger load is applied to a volute side end portion in orbit than to a volute side end portion not in orbit of the main bearing portion, and therefore, severely contact Uneven tends to be generated on the volute side end portion in orbit.
    To cope with this, in patent 1, the center of an annular seal member which is provided on a rear side of an orbiting volute deviates from the center of an end plate in a direction, in which the center a base circle of a deflection overlap. By adopting this configuration, the point of application of a detachment force generated by a pressure of gas produced in a compression chamber to a volute in orbit substantially coincides with the point of application of a pressing force in a chamber high-pressure work that presses the volute into orbit against a fixed volute. Therefore, a reversal moment applied to the volute in orbit can be reduced to thereby reduce the area of the high pressure working chamber (see Figures 1 to 3 of Patent 1).
    In patent 1, however, a construction is adopted in which the orbiting scroll is supported in stages by connecting a boss projecting from the center of the rear side of the volute in orbit to a crankshaft and near an outer circumferential surface. of the volute in orbit, a force in a thrust direction is carried by a sliding surface. Therefore, even in the case where the center of the annular seal member deflects in the direction in which the center of the base circle of the spiral member deflects, positions from a central portion to an outer circumference are affected. more or less by an external force variation applied in the direction of thrust, which causes the fear that they can not support such an external force during its application.
    The Applicant of this patent application has produced fluid scroll machines in which a fixed volute and an orbiting volute are connected together by a drive shaft and crank mechanisms so that the orbiting volute is allowed to rotate. around the fixed volute.
    Here, a bearing which directs the orbit movement is provided in the housings which are secured together via the volute in orbit and the fixed scroll. A driving force output from an electric motor or the like is transmitted via the drive shaft to a central bearing which is provided in the orbiting volute having some deflection, and the driving force is transformed into motion orbiting the volute in orbit on the basis of the deflection defined while the rotation of the volute in orbit on its own axis is prevented by at least one or more crank mechanisms which are provided on an outer circumference of an element now the landing that is attached to the volute in orbit.
    Related Art Document Patent Document
    Patent Document 1: Japanese Open Publication 2012 102 614 Summary of the Invention
    In the scroll fluidic machine which is configured as described above, the compression chamber moves from an outer circumferential side to an inner circumferential side following rotation of the volute in orbit whereby the radial load distribution changes, and a reversal moment is generated in the crank pins around each crankpin by the load applied in the thrust direction. Then, the bearing progressively uses the load variation on the bearing, interrupting the gentle movement in orbit of the volute in orbit. The invention has been proposed with a view to improving the problematic situation described above and its purpose is to provide particularly in a said fluid machine with cantilever volutes having a bearing avoiding rotation adopting a crank mechanism, a fixed scroll element which has a construction capable of suppressing the generation of a reversing moment which acts on a crank mechanism by considering the arrangement of the crankpin mechanism, whereby the fixed scroll element is highly efficient and stable higher. An object of the present invention is also to provide a fluid scroll machine that uses the fixed scroll member.
    In order to solve the problem, a volute element attached in accordance with an aspect of the present invention comprises an end plate, a fixed spiral cover provided on the end plate; and a crank mechanism, wherein the crank mechanism comprises a shaft portion provided on the end plate, and the shaft portion extends in a thrust direction of a compression space formed by the plate end and the cover fixed.
    A cantilevered scroll fluidic machine according to one aspect of the present invention includes a scroll member attached to a housing, an orbiting scroll member configured to engage the fixed scroll member while rotates to thereby form a movable compression space, a drive shaft configured to support the volute element in orbit via an eccentric shaft, and a crank mechanism configured to support the volute element in orbit so as to prevent the orbiting scroll element from rotating on its own axis. The crank mechanism includes a first shaft rotatably supported by the fixed scroll member and a second shaft rotatably supported by the scroll member in orbit and eccentric relative to the first shaft. The first shaft attached to the fixed scroll member extends in a thrust direction of a compression space that is formed by the fixed scroll member and the scroll member in orbit. The first crank mechanism shaft may be perpendicular to the opposite end plate surfaces, on which the fixed scroll member and the orbit scroll member slide over each other. The first shaft (11a) of the crank mechanism (11) can extend parallel to the drive shaft.
    Brief description of the drawings
    Figure 1 is a sectional view showing an embodiment of a scroll fluidic machine according to the invention.
    Fig. 2 is an enlarged explanatory drawing of a crank mechanism which is used in the scroll fluidic machine shown in Fig. 1.
    Fig. 3 is a schematic explanatory drawing showing a force of action of a compression space which acts around the crankpin mechanism in the scroll fluidic machine shown in Fig. 1.
    Detailed Description of the Preferred Embodiments
    Hereinafter, an embodiment of a fixed volute member according to the invention and a scroll fluid machine which uses the fixed scroll member will be described in detail on the basis of the accompanying drawings.
    Figure 1 is a sectional view of a fluidic scroll machine 1 according to one embodiment of the invention.
    This scroll fluidic machine 1 is a so-called cantilevered scroll fluidic machine in which an eccentric shaft portion of a drive shaft which drives an orbiting scroll member supports the flow element. volute in orbit cantilevered via a bearing element.
    To briefly describe the fluidic scroll machine 1, it has a first housing 2 which is open on a left end side in a direction of the X axis in the figure and a second housing 3 which is contiguous with the first housing 2 in the direction of the X axis and which is larger in dimension in a direction of the Y axis than the first housing 2. The scroll fluidic machine 1 has a third housing 4 which is disposed in the first housing 2 of so as to be concentric with the latter with respect to a central line X1 extending along the direction of the X axis and the center of the opening on the left end side of the first housing 2 in the direction of the X axis.
    A fan 5 is disposed in the third housing 4, and this fan 5 rotates around the central line X1.
    Further, an orbiting volute element 6 and a fixed volute element 7 are provided in the second housing 3. The fixed volute element 7 is attached to the second housing 3 and the third housing 4. In addition, although will be described later, the fixed volute member 7 is attached to a second housing 3 via a bearing attachment member 13 on a crank mechanism which connects the orbiting volute element 6 and the fixed volute member 7 together.
    In addition, a plurality of inlet ports 3in (which will be described below) from which cooling air is taken is provided in the second housing 3, and a cooling passage is provided in the first housing 2 and the third housing 4. The orbiting volute element 6 and the fixed volute element 7 have end plates 6a, 7a and an orbital spiral cover 6r and a fixed cover 7r which are respectively provided on the electrodes. end 6a, 7a.
    The orbit cover 6r of the orbiting scroll member 6 is provided on the end plate 6a so as to project from the end plate 6a. The fixed cover 7r of the fixed scroll member 7 is formed by etching the end plate 7a to a depth corresponding to a height of the orbit cover 6r in a spiral groove.
    Thus, being constructed in the manner described above, the orbiting volute element 6 and the fixed volute element 7 are arranged so that respective sliding surfaces of the end plates 6a, 7a are directed in the direction of the Y axis in a state such that the orbital cover 6r and the fixed cover 7r engage each other with the orbital cover 6r on the end plate 6a of the volute element orbit 6 brought into engagement with the spiral groove (the fixed cover 7r) etched in the end plate 7a of the fixed volute element 7. Then crescent-shaped compression spaces S are formed following the taking of the covering in orbit 6r and the cover fixed 7r with each other. End seals 7rs, 7rs are respectively attached by fitting to the distal ends of the orbital cover 6r and the fixed cover 7r, each of which faces the end plates 6a, 7a with a small spacing. It should be noted that in fact, a gap which is of the order of one micron and with which the compression chamber can be sufficiently sealed, exists between the end plate 6a and the fixed cover 7r and between the plate of end 7a and the cover in orbit 6r. An introduction port (omitted) is provided, which communicates with the compression spaces S so as to introduce a compressible fluid into the compression spaces S from an outside location, and an exhaust port 8 is provided, which communicates with a central compression space S so that a compressed fluid of a predetermined pressure is discharged from the central discharge port 8. The orbiting volute element 6 which is configured as described above is connected via a bearing member 10 to an eccentric shaft 9 on a distal end of a drive shaft 9, which is inserted by the third housing 4 and the fan 5 along the direction of the center line X1. An axis X2 of the eccentric shaft 9a is eccentric with respect to the center line X1 of a distance L. The drive shaft 9 is connected to an output shaft of a drive motor which is not not represented.
    In addition, in the orbiting volute element 6 and the fixed volute element 7, crank mechanisms 11 are provided in a plurality of locations (here three locations) which are located near the outer circumferences of the plates. end 6a, 7a which slide on one another.
    Further, cooling fins f7 are provided on a rear side of the end plate 7a of the fixed volute member 7. Although not shown, cooling fins are provided on the volute element in orbit 6 .
    The crank mechanism 11 includes a first shaft 11a which is rotatably supported by the end plate 7a of the fixed scroll member 7 via a roller bearing 12a and a second shaft 11b which is rotatably supported by the roller plate 12a. 6a end of the volute element in orbit 6 via a roller bearing 12b and whose axis is eccentric with a value L with respect to an axis of the first shaft 11a (see Figure 2). In addition, the crank mechanism 11 is attached to the second housing 3 via the bearing fastener 13.
    The scroll fluidic machine 1 according to the invention is configured as described above. Then its operation and operation will be described.
    When the drive motor is driven, its power is transmitted to the drive shaft 9, and the drive shaft 9 rotates around the center line X1. As this happens, the fan 5 also rotates, whereby the cooling air is taken to be introduced into the second housing 3 on a downstream side of the second housing 3 in the direction of the center line X1. Then, the cooling air passes through the cooling fins f7 on the rear side of the end plate 7a of the fixed volute element 7 in the second housing 3 and then passes through the volute element in orbit 6 and is evacuated via the third housing 4 and the opening portion into the first housing 2, whereby the orbiting volute element 6 and the fixed volute element 7 are cooled as required. In addition, the cooling air is introduced from the inlet ports 3in which are open in the second housing 3 which houses the orbiting volute element 6 and the fixed volute element 7 in the second housing 3 to be used to cool the orbiting volute element 6 and the fixed scroll member 7. The orbiting scroll member 6 is connected to the eccentric shaft 9a on the distal end of the spindle shaft. 9 via the bearing element 10, and in addition the second shafts 11b of the crankpin mechanisms 11 which are provided near the outer circumferences of the end plates 6a, 7a of the orbiting volute element 6 and the fixed volute element 7 are eccentric of the distance L with respect to the first shafts 11a which are rotatably supported by the fixed volute element 7. Thus, when the drive shaft 9 rotates around the central line X1, the volute element in orbit 6 revolves around in a n radius equal to distance L without turning on its own axis.
    By the revolution of the volute element in orbit 6, the orbital cover 6r of the orbiting volute element 6 moves in the spiral groove (fixed cover 7r) etched in the end plate 7a of the element of fixed volute 7 while engaging with the fixed cover 7r, whereby the compression spaces S which are formed by the orbital cover 6r and the fixed cover 7r can be moved from a side starting the winding of the cover in orbit 6r and the fixed cover 7r, that is to say an external location to a side ending winding, that is to say a central side.
    Following the displacement of the compression spaces S as described above, a compressible fluid is introduced from the inlet port located near an outer side of the fixed scroll member 7 into the compression spaces S and continues to be compressed at the same time as the compression spaces S move towards the central location. Then, the compression fluid is compressed to become a compressed fluid of a predetermined pressure and the compressed fluid can be discharged from the central compression space S via the outlet port 8.
    When the compression operation is performed as described above, the in-orbit cover 6r of the orbiting volute member 6 moves in the spiral groove (fixed cover 7r) etched into the end plate 7a of the attached volute member 7 while engaging the fixed cover 7r, whereby the compression spaces S move from the outer side to the central location of the fixed scroll member 7 along the radial direction of the Fixed volute element 7, i.e., along the direction of the Y axis and as this occurs, the pressures in the compression spaces S change at any time. An action force (thrust force) F1 which acts in the direction of the Y axis following the pressure change in the compression spaces S possibly acts on the first shafts 11a of the crank mechanisms 11 which are supported in rotation by the end plate 7a of the fixed scroll element 7.
    However, as the compression spaces S are formed in the radial direction of the fixed scroll member 7, i.e. in the direction of the Y axis, and the first shafts 11a are positioned on extensions in the direction where the compression spaces S are formed, the generation of a tilting moment around the first shafts 11a can be suppressed at a maximum extent (see Figure 3).
    Thus, as has been described in this regard, according to the scroll fluidic machine 1 of this embodiment, in said cantilevered volute machine 1 having bearings to avoid crank mechanism rotation, it is possible to provide the highly efficient scroll fluid machine which is capable of suppressing the generation of the overturning moment which acts on the shaft portions of the crankpin mechanisms 11 by positioning the shaft portions or the first shafts 11a of the crankpin mechanism 11 on the radial extensions of the compression spaces S in the fixed scroll member 7, whereby the scroll fluidic machine has superior stability and is highly efficient.
    Further, as the construction is adopted, in which the orbiting volute element 6, the fixed volute element 7 and the crank mechanisms 11 which connect the orbiting volute element 6 and the fixed volute element 7 together are housed in the only housing which is the second housing 3, the overall capacity can be removed so that the fluidic scroll machine 1 can be made compact.
    According to the embodiments described above, although a radial stress of the compression space is applied to the shaft portion of the crank mechanism on the end plate, a reversing moment applied to the part of crank mechanism shaft can be eliminated as far as possible.
    According to the embodiments described above, as the first shaft of the crank mechanism is positioned in the range in the thrust direction of the compression space against the action force applied in the radial direction by the pressure variation applied in the radial direction of the compression space, the reversal moment that is applied to the crank mechanism can be suppressed to a maximum extent.
    According to the embodiments described above, in said cantilevered scroll fluidic machine having the bearing avoiding rotation of crank mechanism, it is possible to provide the highly efficient scroll fluid machine which is able to suppress the generating the overturning moment which acts around the crank mechanism shaft portion by positioning the crank mechanism shaft portion on the radial extension of the compression space in the fixed scroll member and presenting the superior stability.
    Thus, according to the fluid scroll machine of the invention, the harmful vibration which tends to appear in the fluidic machine with cantilevered scrolls is suppressed to thereby eliminate the load which would otherwise be generated, whereby it is possible to provide the highly efficient and long-lasting scroll fluidic machine. Therefore, the scroll fluid machine of the invention can also be applied to relatively low output equipment such as heat pump installation equipment such as a refrigerator or dehumidifier.
    While only a few exemplary embodiments of this invention have been described in detail above, those skilled in the art will readily appreciate that many modifications are possible in the exemplary embodiments without materially leaving out the innovative teaching and the advantages. of this invention. Therefore, all such modifications are intended to be included within the scope of this invention.
    The present application claims priority over the Japanese patent application 2013 072 382 filed March 29, 2013.
    Description of numbers and letters of reference 1 fluidic machine with volutes; 2 first housing; 3 second housing; 3in entry port; 4 third case; 5 fan; 6 volute element in orbit; 6r recovery in orbit; 7 fixed volute element; Fixed cover; 6rs, 7rs end seal; 8 vent hole; 9 drive shaft; 9a eccentric shaft; Bearing element; Crank mechanism; The first tree; 11b second tree; 12a, 12b roller bearing; 13 bearing fasteners; S compression space; f7 fin.
    权利要求:
    Claims (3)
    [1]
    1. - Fluidic machine with cantilevered scrolls: a volute element fixed (7) to a housing (3); an orbiting scroll member (6) configured to engage the fixed scroll member (7) as it rotates to thereby form a compression gap (S) in a movable manner; a drive shaft (9) configured to support the orbiting scroll member (6) via an eccentric shaft (9a); and a crank mechanism (11) configured to support the orbiting scroll member (6) to prevent the orbiting scroll member (6) from rotating on its own axis, wherein the crank mechanism ( 11) comprises: a first shaft (11a) rotatably supported by the fixed scroll member (7) and a second shaft (11b) rotatably supported by the orbiting scroll member (6) and eccentric with respect to the first shaft (11a), and wherein the first shaft (11a) attached to the fixed scroll member (7) extends in a direction of thrust (X-direction) of a compression space (S) which is formed by the fixed scroll member (7) and the orbiting scroll member (6).
    [2]
    The fluid scroll machine according to claim 1, wherein the first shaft (11a) of the crank mechanism (11) is perpendicular to the opposite surfaces of the end plates (6a, 7a), on which the scroll member fixed (7) and the volute element in orbit (6) slide on one another.
    [3]
    3. A fluid scroll machine according to claim 1 or 2, wherein the first shaft (11a) of the crank mechanism (11) extends parallel to the drive shaft (9).
    类似技术:
    公开号 | 公开日 | 专利标题
    FR2721356A1|1995-12-22|Rotary type compressor for air conditioning or refrigeration.
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    EP3557078A1|2019-10-23|Fluid compressor
    JP2018071359A|2018-05-10|Scroll fluid machine
    FR2817922A1|2002-06-14|VOLUTES TYPE COMPRESSORS
    JP2012180840A|2012-09-20|Scroll fluid machine
    FR2817406A1|2002-05-31|Stator for a rotating electrical machine, uses grooved outer and inner faces on two concentric cylinders forming stator to provide passages for cooling fluid to circulate round stator
    JP3133112B2|2001-02-05|Scroll type fluid machine
    同族专利:
    公开号 | 公开日
    JP2014196689A|2014-10-16|
    CN104074757A|2014-10-01|
    JP6139938B2|2017-05-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US5632612A|1994-04-05|1997-05-27|Air Squared, Inc.|Scroll compressor having a tip seal|
    GB2335952A|1998-04-01|1999-10-06|Toyoda Automatic Loom Works|Scroll-type fluid mover|
    US6129530A|1998-09-28|2000-10-10|Air Squared, Inc.|Scroll compressor with a two-piece idler shaft and two piece scroll plates|
    US20030223898A1|2001-12-28|2003-12-04|Anest Iwata Corporation|Scroll fluid machine and assembling method thereof|
    JPH023093U|1988-06-20|1990-01-10|
    JPH04339189A|1991-05-15|1992-11-26|Sanden Corp|Scroll type fluid device|
    JP2005120999A|2003-10-16|2005-05-12|Shinji Kawazoe|Scroll fluid machine|
    US20060099096A1|2004-11-08|2006-05-11|Shaffer Robert W|Scroll pump system|
    JP4969878B2|2006-03-13|2012-07-04|アネスト岩田株式会社|Scroll fluid machinery|
    JP4948869B2|2006-03-28|2012-06-06|アネスト岩田株式会社|Scroll fluid machinery|
    JP2009264370A|2008-03-31|2009-11-12|Hitachi Ltd|Scroll type fluid machine|
    JP5421886B2|2010-09-30|2014-02-19|アネスト岩田株式会社|Scroll fluid machinery|
    法律状态:
    2020-12-23| MM| Lapsed because of non-payment of the annual fee|Effective date: 20200331 |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2013072382A|JP6139938B2|2013-03-29|2013-03-29|Fixed scroll body and scroll fluid machine using the same|
    JP723822013|2013-03-29|
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