• 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:
    Radial compressor (10), with an impeller (11); a housing (13) having a radially outer spiral housing portion (16) and a radially inner insert portion (15); a main flow passage (17) for supplying a medium to be compressed toward the impeller (11); with a circulation chamber (18) arranged radially outside the main flow channel (17), which is delimited by a contour wall (19) from the main flow channel (17) which in the area of the impeller (11) communicates with the main flow channel (17) via a circulation opening (20). and which is connected to the insert portion (15) via struts (14) extending in the circulation chamber (18). The main flow channel (17) is delimited by the contour wall (19) and downstream of the contour wall (19) by a first segment (21) of the insert section (15). The struts (14) engage a second segment (22) of the insert portion (15). The second segment (22) of the insert portion (15) engages a downstream end (23) of the first segment (21) of the insert portion (15). The upstream end (24) of the first segment (21) of the insert portion (15) projects freely toward the contour wall (19). The first segment (21) of the insert portion (15) has an approximately constant thickness in the meridian section over its extension between the downstream end (23) and the upstream end (24) with a maximum thickness variation of 5%.
    公开号:CH714650A2
    申请号:CH00027/19
    申请日:2019-01-10
    公开日:2019-08-15
    发明作者:Thaser Boris；Köhler Matthias；Löwlein Oswald；Eisenbach Sven
    申请人:Man Energy Solutions Se；
    IPC主号:
    专利说明:

    The invention relates to a radial compressor according to the preamble of claim 1.
    A radial compressor of an exhaust gas turbocharger is known from EP 2 194 277 A1. EP 2 194 277 A1 shows a radial compressor with a rotor-side impeller and a stator-side housing. The housing defines a main flow channel to guide medium to be compressed in the direction of the impeller. A circulation chamber is arranged outside the main flow channel and is delimited from the main flow channel by a contour wall. According to EP 2 194 277 A1, the circulation chamber extends to a circulation opening in the area of the impeller. In the area of the impeller, the circulation chamber is connected to the main flow channel via the circulation opening. Struts run within the circulation chamber, via which the contour wall, which delimits the main flow channel from the circulation chamber, is connected to the housing.
    According to EP 2 194 277 A1, the housing of the radial compressor has a radially outer spiral housing section and a radially inner insert section. The volute section and insert section are made in one piece. A first segment of the insert section defines the main flow channel downstream of the contour wall. The contour wall is connected to a second segment of the insert section via the struts. The second segment of the insert section, on which the struts engage, in turn engages an upstream end of the first segment of the insert section.
    In the event of damage to such a radial compressor, fragments of the impeller can strike the insert section, for example. So far, the insert section of such a radial compressor has not been able to deform in a defined manner in the event of failure. Rather, the deformation of the insert section is prevented by the structural connection of the second segment of the insert section to the first segment of the insert section. As a result, the forces resulting from the impact of the fragments in the insert section are transmitted to the volute section. This restricts containment security, since the spiral housing section and / or a flange connection between the spiral housing section and the bearing housing can be overloaded and fragments can get into the environment.
    [0005] There is a need to increase the containment security of a radial compressor.
    Proceeding from this, the object of the invention is to create a new type of radial compressor.
    This object is achieved by a radial compressor according to claim 1.
    According to the invention, the second segment of the insert section engages at a downstream end of the first segment of the insert section. The upstream end of the first segment of the insert section protrudes freely in the direction of the contour wall. Seen in the meridian section, the first segment of the insert section has an approximately constant thickness with a maximum deviation of 5% due to its extension between the downstream end and the upstream end.
    With the invention, it is possible that the first segment of the insert section can deform defined into the circulation chamber, in particular when fragments of the impeller of the radial compressor hit the insert section. The approximately constant thickness of the first segment of the insert section between the downstream end and the upstream end, seen in the meridian section, with a thickness deviation of at most 5%, in combination with the other features mentioned above, ensures the defined deformation of the insert section.
    In this way, in the event of failure of the radial compressor, a defined deformation of the insert section, namely the first segment of the insert section delimiting the main flow channel at least in sections, is made possible. The introduction of force into the spiral housing section and / or into the flange connection between the spiral housing section and the bearing housing is prevented or greatly reduced.
    According to an advantageous development, the first segment of the insert section is surface-treated on a first side facing the main flow channel and on a second side facing away from the main flow channel. The surface treatment of the first segment of the insert section on both sides of the same supports the defined deformation of the same in the event of damage and thus further increases the containment safety.
    According to an advantageous development, the first segment of the insert section has an approximately constant thickness over its extent with a thickness deviation of at most 2%, preferably of at most 1%. Such a defined thickness of the first segment of the insert section supports the defined deformation of the same and further increases the containment security of the radial compressor.
    According to an advantageous development, a material recess, in particular in the form of a notch, is formed in a transition region between the first segment of the insert section and the second segment of the insert section on a side facing away from the main flow channel. The material recess supports the defined deformation of the first segment of the insert section in the event of failure of the radial compressor, in particular when fragments of the impeller meet the first segment of the insert section. This also increases the containment security of the radial compressor.
    CH 714 650 A2 [0014] Preferred developments of the invention result from the dependent claims and the following description. Exemplary embodiments of the invention are explained in more detail with reference to the drawing, without being restricted to this. It shows:
    1: a schematic meridian section through a radial compressor according to the invention.
    A radial compressor 10 has a rotor-side impeller 11 with a plurality of blades 12. Furthermore, a radial compressor 10 has a stator-side housing 13.
    From the stator-side housing 13, a radially inner insert section 15 positioned in the region of the impeller 11 and a radially outer spiral housing section 16 arranged downstream of the impeller 11 are shown in FIG. 1, which are formed by separate assemblies in the exemplary embodiment in FIG. 1 ,
    In Fig. 1, the housing 13 is made of several parts and includes the separate insert section 15 and the separate spiral housing section 16, which are connected together.
    In the preferred exemplary embodiment shown, the insert section 15 and the radially outer spiral housing section 16 of the stator-side housing 13 are therefore separated on the component side, so that they are provided by separate or separate components. In the preferred exemplary embodiment shown, the insert section 15 therefore does not delimit, and also not in sections, a spiral-like flow channel, which is defined by the spiral housing section 16.
    It should be noted that, in contrast to the exemplary embodiment shown, it is in principle also possible for the insert section 15 and the spiral housing section 16 to be formed in one piece and provided by a monolithic assembly. In principle, it is also possible for the insert section 15 to delimit sections of the spiral flow channel, which is defined by the spiral housing section 16.
    The housing 13 of the radial compressor 10 defines a main flow channel 17 for the medium to be compressed in order to guide the medium to be compressed in the direction of the impeller 11 via the main flow channel 17. The housing 13 defines a circulation chamber 18 radially on the outside adjacent to the main flow channel 17. A contour wall 19, which is also referred to as an annular web, delimits the main flow channel 17 from the circulation chamber 18 and delimits the main flow channel 17 in sections.
    The circulation chamber 18 extends from a section upstream of the impeller 11 into the region of the impeller 11. 1 shows a circulation opening 20 in the region of the impeller 11, via which the circulation chamber 18 is connected to the main flow channel 17 in the region of the impeller 11. Struts 14 extend within the circulation chamber 18.
    Via the struts 14, the contour wall 19 is connected to the housing 13, namely in the exemplary embodiment shown with the insert section 15 of the housing 13.
    The insert section 15 of the housing 13 has a first segment 21 which delimits the main flow channel 17 downstream of the contour wall 19. The circulation opening 20 is formed between the contour wall 19 and this first segment 21 of the insert section 15. The struts 14, on which the contour wall 19 also engages, engage a second segment 22 of the insert section 15.
    The second segment 22 of the insert section 15 is made in two parts from the two parts 22a and 22b in the embodiment shown. The parts 22a and 22b can also be made in one piece or in one piece.
    The second segment 22 of the insert section 15, on which the struts 14 engage, engages at a downstream end 23 of the first segment 21, which then limits the main flow channel 17 in sections to the contour wall 19. The upstream end 24 of the first segment 21 of the insert section 15 projects freely floating in the direction of the contour wall 19. The circulation opening 20 is formed between the contour wall 19 and this upstream end 24 of the first segment 21 of the insert section 15.
    The first segment 21 of the insert section 15, seen in the meridian section, has an approximately constant thickness or thickness curve with a thickness deviation of at most 5% over its extension between the downstream end 23 of the same and the upstream end 24 of the same.
    If, for example, a fragment of the impeller 11 strikes the insert section 15, namely the first segment 21 thereof, the upstream end 24 of the first segment 21 of the insert section 15 can deform in a defined manner into the circulation chamber 18 and so on Reduce the kinetic energy of fragments of the impeller 11 in a defined manner. The forces introduced into the housing 13 in the event of damage can thereby be controlled in a targeted manner in order to avoid overloading the spiral housing section 16 and a flange connection between the spiral housing section and the bearing housing and the associated leakage of fragments into the environment. This increases containment security.
    In order to support or improve this defined deformation of the first segment 21 of the insert section 15 in the event of damage to the compressor 10, the first segment 21 of the insert section 15 is on one of the
    CH 714 650 A2
    Main flow channel 17 facing first side 25 and on a second side 26 facing away from main flow channel 17, in particular such that first segment 21 of insert section 15 extends over its entire extent, i.e. starting from upstream end 24 thereof in the direction of a transition region 27 to the second segment 22 of the insert section 15, seen in the meridian section, which has an approximately constant thickness or the approximately constant course of thickness. The approximately constant thickness allows a thickness deviation of at most 5 percent, preferably a thickness deviation of at most 2 percent, particularly preferably a thickness deviation of at most 1 percent.
    Then, when the thickness of the first segment 21 of the insert section 15 is 10 mm, in the particularly preferred case the thickness deviates by a maximum of 0.1 mm from the thickness of 10 mm over the entire extent of the first segment 21 of the insert section 15 between the upstream end 24 of the same and the transition region 27 to the second segment 22 and the downstream end 23 thereof.
    The deformation behavior of the first segment 21 of the insert section 15 can then be further improved if, in the transition region 27 between the first segment 21 and the second segment 22, a material cutout, preferably designed as a notch 28, on the side 26 of the first side facing away from the main flow channel 17 Segment 21 is formed.
    As already stated, the insert section 15 is formed in several parts from the two parts 22a, 22b. However, the insert section 15 can also be made in one piece, in which case the two parts 22a, 22b are in one piece.
    With the invention, in the event of damage, kinetic energy from fragments of the impeller 11 can be reduced by a defined deformation of the first segment 21 of the insert section 15. The spiral housing 16, in particular a spiral housing outer wall thereof and a flange connection between the spiral housing section and the bearing housing, is then not subjected to any or only a slight load and deformation. The containment security is increased.
    The radial compressor 10 of FIG. 1 is a radial compressor of an exhaust gas turbocharger. This is axially flowed against by a medium to be compressed in the region of the impeller 11 and flows off radially from the compressed medium.
    Reference symbol list [0034]
    centrifugal compressors
    Wheel
    blade
    casing
    strut
    Insert section
    Volute section
    Main flow channel
    circulation chamber
    contour wall
    Circulation opening first segment second segment
    22a first part
    22b second part downstream end upstream end first side
    CH 714 650 A2 second page
    Transition area
    score
    claims
    权利要求:
    Claims (8)
    [1]
    1. Radial compressor (10), in particular radial compressor of an exhaust gas turbocharger, with a rotor-side impeller (11);
    with a stator-side housing (13) which has a radially outer spiral housing section (16) and a radially inner insert section (15);
    with a main flow channel (17) for supplying a medium to be compressed in the direction of the impeller (11);
    With a circulation chamber (18) arranged radially outside the main flow channel (17), which is delimited by a contour wall (19) from the main flow channel (17), which in the area of the impeller (11) with the main flow channel (17) via a circulation opening (20) is connected and which is connected to the insert section (15) via struts (14) extending in the circulation chamber (18);
    the main flow channel (17) being delimited by the contour wall (19) and downstream of the contour wall (19) by a first segment (21) of the insert section (15), and wherein the struts (14) on a second segment (22) of the insert section (15) attack;
    characterized in that the second segment (22) of the insert section (15) engages a downstream end (23) of the first segment (21) of the insert section (15);
    the upstream end (24) of the first segment (21) of the insert section (15) projects freely in the direction of the contour wall (19);
    the first segment (21) of the insert section (15), seen in the meridian section, has an approximately constant thickness with a maximum deviation of 5% due to its extension between the downstream end (23) and the upstream end (24).
    [2]
    2. A radial compressor according to claim 1, characterized in that the upstream end (24) of the first segment (21) is deformable into the circulation chamber (18).
    [3]
    3. A radial compressor according to claim 1 or 2, characterized in that the first segment (21) of the insert section (15) on a first side (25) facing the main flow channel (17) and on a second side (26) facing away from the main flow channel (17) ) is finished.
    [4]
    4. Radial compressor according to one of claims 1 to 3, characterized in that the first segment (21) of the insert section (15) in the meridian section over its extent between the downstream end (23) and the upstream end (24) has an approximately constant thickness with a thickness deviation of at most 2%, preferably of at most 1%.
    [5]
    5. Radial compressor according to one of claims 1 to 4, characterized in that in a transition region (27) between the first segment (21) of the insert section (15) and the second segment (22) of the insert section (15) on one of the main flow channel ( 17) facing away from the side (26), a material recess, in particular in the form of a notch (28).
    [6]
    6. Radial compressor according to one of claims 1 to 5, characterized in that the insert section (15) is formed in one piece.
    [7]
    7. Radial compressor according to one of claims 1 to 6, characterized in that the insert section (15) is formed in several parts.
    [8]
    8. Radial compressor according to one of claims 1 to 7, characterized in that the insert section (15) and the radially outer spiral housing section (16) of the stator-side housing (13) are separated on the component side, the same being provided by separate or separate components.
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    引用文献:
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102018102704.4A|DE102018102704A1|2018-02-07|2018-02-07|centrifugal compressors|
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