WO2021208386A1 - Compresseur à volute - Google Patents

Compresseur à volute Download PDF

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Publication number
WO2021208386A1
WO2021208386A1 PCT/CN2020/121427 CN2020121427W WO2021208386A1 WO 2021208386 A1 WO2021208386 A1 WO 2021208386A1 CN 2020121427 W CN2020121427 W CN 2020121427W WO 2021208386 A1 WO2021208386 A1 WO 2021208386A1
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WO
WIPO (PCT)
Prior art keywords
backing plate
housing
scroll
sleeve
scroll compressor
Prior art date
Application number
PCT/CN2020/121427
Other languages
English (en)
Chinese (zh)
Inventor
秦岩
贾祥敏
袁晚春
Original Assignee
艾默生环境优化技术(苏州)有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202010305072.2A external-priority patent/CN113530814A/zh
Priority claimed from CN202020583722.5U external-priority patent/CN212389516U/zh
Application filed by 艾默生环境优化技术(苏州)有限公司 filed Critical 艾默生环境优化技术(苏州)有限公司
Publication of WO2021208386A1 publication Critical patent/WO2021208386A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00

Definitions

  • the present disclosure relates to a scroll compressor, and more specifically, to an axial flexible mounting mechanism for the scroll compressor.
  • Scroll compressors can be used in, for example, refrigeration systems, air conditioning systems, and heat pump systems.
  • the scroll compressor includes a compression mechanism for compressing a working fluid (for example, a refrigerant), a main bearing housing for supporting the compression mechanism, a rotating shaft for driving the compression mechanism, and a motor for driving the rotating shaft to rotate.
  • the compression mechanism includes a fixed scroll and a movable scroll that moves in translation relative to the fixed scroll. Both the fixed scroll and the movable scroll include an end plate and a spiral blade extending from one side of the end plate.
  • the fixed scroll is mounted to the main bearing seat by an axial flexible mounting mechanism, so that the fixed scroll can move a certain distance axially relative to the movable scroll.
  • the axial flexible installation mechanism usually includes a fastener and a sleeve located outside the fastener. Fasteners are inserted into the mounting holes of the lugs of the fixed scroll to screw the fixed scroll to the main bearing housing. The sleeve is also inserted into the mounting hole of the fixed scroll and is arranged between the head of the fastener and the main bearing seat, so that there is a certain gap between the head of the fastener and the lug of the fixed scroll for the fixed scroll Axial movement.
  • Fasteners are usually screws, bolts, etc.
  • the structural design of the bolt connection part has become the design bottleneck of the variable frequency compressor with axial flexibility.
  • the present disclosure provides a scroll compressor capable of simultaneously reducing the sliding risk of the sleeve and the fracture failure risk of the bolt and the main bearing seat.
  • the scroll compressor according to the present disclosure the contradiction between the sliding risk of the sleeve and the fracture risk of the bolt is eliminated, so that the structural design of the bolt connection part is no longer the design bottleneck of the axially flexible inverter compressor.
  • a scroll compressor including a compression mechanism including a fixed scroll and a movable scroll, and the movable scroll is configured to orbit relative to the fixed scroll to compress a working fluid;
  • a housing the housing defines an internal space for accommodating the compression mechanism; a main bearing housing that is fixed to the housing and supports the movable scroll; and an axial flexible mounting mechanism that connects the fixed scroll to the main via the axial flexible mounting mechanism
  • the bearing seat enables the fixed scroll to move a predetermined distance in the axial direction.
  • the axial flexible installation mechanism includes: a fastener with a head; a sleeve arranged on the outer periphery of the fastener; and at least partially arranged in the axial direction.
  • the backing plate part between the head of the fastener and the sleeve, the backing plate part can be engaged with the housing, so that the housing can provide radial support to the backing plate part.
  • the backing plate portion is rigidly connected to the housing, or a clearance fit is formed between the backing plate portion and the housing, so that the backing plate portion engages with the housing when the radial load received by the sleeve reaches a predetermined value.
  • the rigid connection includes direct welding with the shell, zero-interference fit or riveting, or indirect fixed connection with the shell through other components.
  • the backing plate part includes a body part and a flange part extending outward from a radially outer side of the body part, the body part is provided with a hole through which the fastener passes, and the flange part is configured to be able to be engaged with the housing.
  • the flange portion is configured to extend radially outward from the body portion and has a radially outer side wall, which is configured to be capable of radially engaging with the housing.
  • the flange portion is configured to include a radially extending portion and an axially extending portion, the radially extending portion extending radially outward from the body portion, and the axially extending portion from the radially extending portion in the axial direction away from the fastening
  • the direction of the threaded part connected to the main bearing seat of the piece extends, and the end of the axially extending part has a connecting end part configured to be able to be axially or radially engaged with the housing.
  • a plurality of fasteners share a backing plate portion, and the backing plate portion is configured as a single integral annular member in which a plurality of body portions and a plurality of flange portions are connected to each other by a connecting portion.
  • each fastener of the plurality of fasteners is correspondingly provided with a backing plate part, and the backing plate part includes a body part and a flange part.
  • the extension direction of the flange portion of each shim plate portion extending outward from the body portion deviates from the radial direction.
  • the backing plate part and the fastener are formed as an integral or separate body, and when the backing plate part and the fastener are formed as separate bodies, the body part of the backing plate part and the fastener form a clearance fit.
  • the backing plate portion further includes a cylindrical portion extending in the axial direction toward the threaded portion of the fastener connected to the main bearing housing, and there is a gap between the axial free end surface of the cylindrical portion and the fixed scroll in the axial direction, To define the predetermined distance that the fixed scroll moves in the axial direction.
  • the cylindrical portion is a hollow cylindrical portion so as to define a space for accommodating at least a part of the sleeve.
  • the cylindrical part of the backing plate part and the sleeve form a clearance fit.
  • Figure 1 is a partial longitudinal sectional view of a conventional scroll compressor
  • Figure 2 is an enlarged detail view of part A in Figure 1, which shows the axial flexible mounting mechanism
  • FIG. 3 is a partial longitudinal sectional view of the scroll compressor according to the first embodiment of the present disclosure, which shows an axial flexible installation mechanism
  • FIGS. 4a and 4b are respectively a top perspective schematic view and a bottom perspective schematic view of the backing plate part in the axial flexible mounting mechanism of the scroll compressor according to the first embodiment of the present disclosure
  • Fig. 5 is a schematic diagram of the force of the backing plate part in the axial flexible mounting mechanism of the scroll compressor according to the first embodiment of the present disclosure
  • FIG. 6 is a partial longitudinal sectional view of a scroll compressor according to a second embodiment of the present disclosure, which shows an axial flexible installation mechanism
  • Figure 7a is a partial longitudinal cross-sectional view of a scroll compressor according to a third embodiment of the present disclosure, which shows an axial flexible mounting mechanism
  • Figure 7b is an enlarged detail view of part B in Figure 7a;
  • FIGS. 8a and 8b are respectively a perspective schematic view of a backing plate part according to a modification of the first embodiment of the present disclosure and a top view of a compression mechanism of a scroll compressor with the backing plate part installed;
  • 9a and 9b are a partial longitudinal sectional view of a scroll compressor according to a fourth embodiment of the present disclosure and a three-dimensional schematic diagram of a bolt in an axial flexible mounting mechanism;
  • 10a and 10b are a partial longitudinal sectional view of a scroll compressor according to a modification of the fourth embodiment of the present disclosure and a perspective schematic view of a bolt in an axial flexible mounting mechanism;
  • Figures 11a, 11b, and 11c are schematic diagrams of the existing sleeves, bolts, and axially flexible mounting mechanism when the compressor is operating.
  • the compressor 10 includes a compression mechanism, a motor, a rotating shaft (also referred to as a drive shaft or a crankshaft) 7, a main bearing housing 5, and a housing that defines an internal space for accommodating the compression mechanism.
  • the casing includes a substantially cylindrical casing body 1, a casing top cover, a sound-absorbing cover, and the like of the compressor.
  • the compression mechanism includes a fixed scroll 2 and a movable scroll 3.
  • the motor is configured to rotate the rotation 7, and then, the rotation shaft 7 drives the movable scroll 3 to orbit relative to the fixed scroll 2 (that is, the central axis of the movable scroll moves around the central axis of the fixed scroll, but the movable scroll does not Will rotate around its central axis) to compress the working fluid.
  • the fixed scroll 2 can be fixed with respect to the housing body 1 in any suitable manner, and is fixedly mounted to the main bearing housing 5 by bolts as shown, which will be described in detail later.
  • the fixed scroll 2 may include a fixed scroll end plate 22 and a fixed scroll blade 24 extending from one side of the fixed scroll end plate 22.
  • the fixed scroll 2 also has a lug 26 extending radially outward from its radially outermost outer peripheral surface. A mounting hole is provided in the lug 26 for receiving an axial flexible mounting mechanism so as to be connected to the main bearing housing 5.
  • the movable scroll 3 may include a movable scroll end plate 32, a movable scroll blade 34 formed on one side of the movable scroll end plate 32, and a hub portion 31 formed on the other side of the movable scroll end plate 32.
  • the fixed scroll blades 24 and the movable scroll blades 34 can be engaged with each other, so that a series of volumes are formed between the fixed scroll blades 24 and the movable scroll blades 34 when the scroll compressor is running.
  • the moving compression chamber is gradually reduced, so as to realize the compression of the working fluid.
  • the hub 31 is engaged with the eccentric crank pin of the rotating shaft 4 and is driven by the eccentric crank.
  • the main bearing housing 5 is suitable for supporting the movable scroll end plate 32 of the movable scroll 3.
  • the orbiting scroll end plate 32 orbits on the supporting surface of the main bearing housing 5.
  • the main bearing housing 5 can be fixed with respect to the casing body 1 of the scroll compressor 10 by any suitable means.
  • the side surface of the spiral blade 24 of the fixed scroll 2 and the side surface of the spiral blade 34 of the movable scroll 3 also need to be radially sealed.
  • Such a radial seal between the two is usually achieved by the centrifugal force of the movable scroll 3 during operation and the driving force provided by the rotating shaft 7.
  • incompressible foreign matter such as solid impurities and liquid refrigerant
  • the spiral blades 24 and 34 can be temporarily separated from each other in the radial direction to allow the foreign matter to pass through, thereby preventing Damage is caused to the spiral blades 24 and 34, thereby providing the scroll compressor 10 with radial flexibility.
  • the fixed scroll 2 is installed to the main bearing housing 5 through an axial flexible installation mechanism.
  • the main bearing housing 5 is provided with a boss 51 extending in the axial direction on its radially outermost side, and the boss 51 is aligned with the corresponding lug 26 of the fixed scroll 2 in the axial direction.
  • the axial flexible installation mechanism includes a bolt 7 and a sleeve 9 located on the outer periphery of the bolt 7. A clearance fit is formed between the bolt 7 and the sleeve 9.
  • the bolt 7 has a shank, a head 71 at one end of the shank, and a threaded part at the other end of the shank.
  • the threaded portion is configured to be able to be screwed into the threaded hole of the boss 51 of the main bearing housing 5.
  • the bolt 7 also has a stopper 72 formed by extending radially outward from the outer peripheral surface of the head 71. A clearance fit is formed between the lower surface of the stop portion 72 and the upper surface 261 of the lug 26.
  • the sleeve 9 is also received in the mounting hole of the lug 26 of the fixed scroll 2 and a clearance fit is formed between the lower end surface of the sleeve 9 and the upper surface of the boss 51. That is, the sleeve 9 is located between the stop portion 72 and the upper surface of the boss 51 of the main bearing housing 5, thereby defining the positions of the head 71 and the stop portion 72.
  • a certain gap may be reserved between the lower surface of the stop portion 72 and the upper surface 261 of the lug 26 so that the fixed scroll 2 can move a predetermined distance in the axial direction, thereby providing axial flexibility for the scroll compressor 10.
  • the present disclosure aims to reduce the risk of sliding of the sleeve in the axial flexible installation mechanism while reducing the risk of bolt loosening or even breaking, and also aims to reduce the risk of rupture of the boss of the main bearing seat.
  • Fig. 3 shows a partial longitudinal sectional view of the scroll compressor according to the first embodiment of the present disclosure.
  • the scroll compressor includes a housing body 1, a fixed scroll 2, a main bearing seat 5 and an axial flexible mounting mechanism.
  • the axially flexible installation mechanism includes a bolt 17, a sleeve 19 located on the outer periphery of the bolt 17, and a backing plate portion 18 at least partially disposed between the head 171 of the bolt 17 and the sleeve 19 in the axial direction.
  • the structure of the casing body 1, the fixed scroll 2, the main bearing seat 5, the bolt 17, and the sleeve 19 are similar to the existing scroll compressor described above, and therefore will not be repeated. Referring to FIGS.
  • the backing plate portion 18 is configured as a single integral annular member, and a plurality of bolts 17 (four shown in the figure) share a backing plate portion 18.
  • the pad portion 18 includes a plurality of body portions 181 and a plurality of flange portions 182 extending outward from the radially outer side of the body portion 181.
  • a hole 185 for the bolt 17 to pass through is provided on the body portion 181 at a position corresponding to the bolt and the mounting hole in the lug 26 (shown as four holes in FIGS.
  • the body part 181 is arranged around the bolt 17 and the body parts 181 are connected to each other through the connecting part 188.
  • the flange portion 182 extends radially outward from the body portion 181, and the flange portions 182 are also connected to each other by a connecting portion 188.
  • Each body portion 181 and each flange portion 182 are connected to each other by a connecting portion 188 to form a single integral ring configuration.
  • the extended end of the flange portion 182 has a radially outer side wall 184.
  • the backing plate portion 18 also has a cylindrical portion 183 extending from the lower surface of the body portion 181 around the hole 185 in the axial direction.
  • cylindrical portion 183 of the backing plate portion 18 extends axially from the lower surface of the body portion 181 toward the upper surface of the lug 26 of the fixed scroll 2 (that is, the opposite surface mated with the sleeve 19), and the cylindrical portion A certain gap can be reserved between the free axial end surface 187 of the 183 and the upper surface of the lug 26 (that is, the gap between the free axial end surface 187 and the fixed scroll 2 in the axial direction), so as to provide the fixed scroll 2 on the axis.
  • the cylindrical portion 183 surrounds a space 186 accommodating a part of the sleeve 16, and at least a part of the sleeve 16 (the part including the upper end surface) is inserted into the cylindrical portion 183.
  • the cylindrical portion 183 may not be a complete hollow cylinder, but a shape in which a part of the wall on the radial inner side is missing, thereby saving installation space.
  • the radially outer side wall 184 of the flange portion 182 is rigidly connected to the housing body 1, usually in a radial connection.
  • the rigid connection includes, but is not limited to, the following methods: direct welding with the housing body 1, zero interference fit or riveting, or indirect fixed connection with the housing body 1 through other components.
  • the following describes the sleeve according to the first embodiment of the present disclosure by comparing with the existing sleeve, bolt, and axial flexible mounting mechanism shown in FIGS. 11a, 11b, and 11c during the operation of the compressor.
  • the changes in the force of the cylinder, the bolt and the axial flexible installation mechanism illustrate the effect of the present disclosure in reducing the sliding risk of the sleeve and the damage risk of the bolt and the main bearing seat.
  • the flexible mounting means axially acting radially overall force F will guide the main bearing boss 515 and stress brought bending moment M, so that the main bearings Block 5 is at risk of cracking. Since most of the force F guide acting on the sleeve 9 is usually distributed to the friction force F 2 of the lower end surface of the sleeve 9, it is usually desirable to reduce the friction force F 2 in order to reduce the sliding risk of the sleeve 9. However, the reduction of the frictional force F 2 will often lead to an increase in the frictional force F 1 borne by the upper end surface of the sleeve 9, which will increase the risk of fracture and failure of the bolt 7. Therefore, designers often need to balance the sleeve 9. The risk of sliding and the risk of failure of the bolt 7.
  • the force F can be turned to a more distributed on the end face of the sleeve 19 of the frictional force F 1, such that the frictional force F 2 is reduced lower end face of the sleeve 19, thereby reducing sleeve Risk of sliding of the barrel 19.
  • the pad portion 18 by the inverted F 1 of the friction sleeve 19 is balanced by the force of one pair of housing body supporting portion 18 of the pad, the pad portion 18 bolt 17 almost no radial force, so almost only by the bolts 17 pre-biasing force F in the axial direction, the risk of fracture failure is also greatly reduced.
  • the radial force F acting on the entire axial flexible mounting mechanism is largely balanced by the supporting force of the housing body 1, the boss 51 of the main bearing seat 5 The resulting bending moment M and stress are also greatly reduced.
  • Fig. 6 shows a partial longitudinal sectional view of a scroll compressor according to a second embodiment of the present disclosure.
  • the scroll compressor according to the second embodiment of the present disclosure includes a housing body 1, a fixed scroll 2, and a main The bearing seat 5 and an axial flexible installation mechanism, etc.
  • the axial flexible installation mechanism includes a bolt 27, a sleeve 29 located on the outer periphery of the bolt 27, and a backing plate 28 at least partially disposed between the bolt 27 and the sleeve 29.
  • the structures and positions of the fixed scroll 2, the main bearing housing 5, the bolt 27, and the sleeve 29 are similar to those of the scroll compressor of the first embodiment described above, and therefore will not be repeated.
  • the backing plate 28 includes a body portion 281 and a flange portion 282.
  • the body part 281 is similar to the body part 181 in the first embodiment, and is provided with a hole through which the bolt 27 passes.
  • the flange portion 282 includes not only a radially extending portion 2821 that extends radially outward, but also an axially extending portion 2822 that extends in the axial direction away from the threaded portion of the bolt 27.
  • the end of the axially extending portion 2822 is configured It is a connection end 2823 for rigid connection with the housing body 1.
  • the connecting end 2823 may be axially joined to the housing body 1 as shown in FIG. 6, or may be radially joined to the housing body 1.
  • the body portion 281 and the radially extending portion 2821 of the flange portion 282 are provided between the head 271 of the bolt 27 and the sleeve 29.
  • the backing plate portion 28 also has a cylindrical portion 283 extending from the lower surface of the main body portion 281 toward the upper surface of the lug 26 of the fixed scroll 2 in the axial direction. A certain gap may be reserved between the free end surface 287 of the cylindrical portion 283 and the upper surface of the lug 26 to provide a predetermined distance that the fixed scroll 2 can move in the axial direction.
  • the second embodiment can not only achieve the effects of reducing the sliding risk of the sleeve and reducing the risk of rupture of the bolt and the main bearing housing similar to the first embodiment, especially when the backing plate portion 28 and the housing body 1 are rigidly connected by welding. It is also particularly advantageous.
  • the flange portion 182 of the backing plate portion 18 only extends radially from the body portion 181 toward the housing body 1, and its radially outer side wall 184 is welded to the housing body 1, and the welding points are connected to bolts. 17 and the sleeve 19 are very close, which easily causes thermal deformation of the bolt 17 and the sleeve 19 during the welding process.
  • the backing plate 28 makes the connecting end 2822 far away from the bolt 27 and the sleeve 29 through the axially extending portion 2822 of the flange portion 282, reducing the welding connection between the end 2823 and the housing body 1.
  • the heat generated in the process affects the bolt 27 and the sleeve 29.
  • the connecting end 2823 is far away from the bolt 27 and the sleeve 29, it is also possible to leave more installation space when the connecting end 2823 and the housing body 1 are joined by riveting or the like.
  • the scroll compressor according to the third embodiment of the present disclosure includes a housing body 1, a fixed scroll 2, and a main The bearing seat 5 and an axial flexible installation mechanism, etc.
  • the axial flexible installation mechanism includes a bolt 37, a sleeve 39 located on the outer periphery of the bolt 37, and a backing plate portion 38 at least partially disposed between the bolt 37 and the sleeve 39.
  • the structure and position of the fixed scroll 2, the main bearing housing 5, the bolt 37, and the sleeve 39 are similar to those of the scroll compressor of the first embodiment described above, and therefore will not be repeated.
  • the backing plate 38 includes a body part 381 and a flange part 382.
  • the body part 381 is similar to the body part 181 in the first embodiment, and is provided with a hole through which the bolt 37 passes, and the body part 381 and the flange part 382 are arranged between the head 371 of the bolt 37 and the sleeve 39.
  • the backing plate portion 28 also has a cylindrical portion 383 extending from the lower surface of the body portion 381 toward the upper surface of the lug 26 of the fixed scroll 2 in the axial direction. A certain gap may be reserved between the free end surface 387 of the cylindrical portion 383 and the upper surface of the lug 26, so as to limit the predetermined distance that the fixed scroll 2 can move in the axial direction.
  • the flange portion 282 extends radially toward the housing body 1 and has a radially outer side wall 384.
  • the difference from the first embodiment is that the radially outer side wall 384 is not rigidly connected to the housing body 1 but forms a clearance fit with the housing body 1.
  • the clearance fit here is a so-called small clearance fit. In particular, it means that there is a very small gap between the radially outer side wall 384 and the housing body 1, or the radially outer side wall 384 is in contact with the housing body 1, but No force is generated on the contact surface.
  • the bolt 37 When the movable scroll 3 orbits relative to the fixed scroll 2, the bolt 37 only has a small amount of deformation when the radial load received by the sleeve 39 is small, and the backing plate portion 38 is not connected to the housing body 1. When contact occurs, the housing body 1 will not generate a radial support force on the backing plate portion 38, and the backing plate portion 38 will not share the radial load borne by the sleeve 39. Of course, in this case, the risk of sliding of the sleeve 39 and the risk of failure of the bolt 37 and the main bearing housing 5 are also relatively low.
  • the risk of sliding of the sleeve 39 and the risk of failure of the bolt 37 and the main bearing housing 5 are greater.
  • the bolt 37 produces a larger amount of deformation, which makes the backing plate part 38 (the radially outer side wall 384) is in contact with the housing body 1, and the housing body 1 generates a radial support force on the backing plate portion 38. Therefore, the backing plate portion 38 begins to participate in sharing the radial load borne by the sleeve 39, thereby The risk of sliding of the sleeve 39 and the risk of rupture and failure of the bolt 37 and the main bearing housing 5 are reduced.
  • the gap-fitting manner of the backing plate portion 38 and the housing body 1 in the third embodiment is easier to manufacture and install.
  • the third embodiment guarantees the effect of reducing the risk of sliding of the sleeve and the risk of rupture and failure of the bolt and the main bearing seat, while also simplifying the manufacturing and installation processes, and has a wider application range.
  • each backing plate portion 48 in the modified example is provided with multiple.
  • the number of the backing plate portions 48 is the same as the number of the axial flexible mounting mechanism (bolts 47), and each bolt 47 is provided with a backing plate portion 48 corresponding to each other.
  • Each backing plate portion 48 includes a body portion 481 and a flange portion 482.
  • the body portion 481 is configured in a ring shape surrounding the bolt 47, and the body portion 481 is provided with a hole 485 through which the bolt 47 passes.
  • the flange portion 482 extends outward from the body portion 481 to form a cantilever shape, the extending direction of which may deviate from the radial direction.
  • the extended end of the flange portion 482 has a radially outer side wall 484.
  • the radially outer side wall 484 is rigidly connected or clearance fit with the housing body 1.
  • the backing plate portion 48 also has a cylindrical portion 483 extending from the lower surface of the body portion 481 around the hole 485 in the axial direction toward the upper surface of the lug 26 of the fixed scroll 2.
  • the backing plate portion 48 of this modification is installed in a manner similar to the first embodiment to form a clearance fit between bolts and sleeves, and can also pass through the free end surface of the cylindrical portion 483 and the upper lug of the main bearing seat. The clearance between the surfaces is used to control the axial movement distance of the fixed scroll.
  • the backing plate portion 48 of this modified example adopts a separate configuration, which is easier to manufacture and install, and has a wider application range.
  • the radially outer side wall 484 of the flange portion 482 for engaging with the housing body 1 may be away from the bolts and bolts to a certain extent.
  • the sleeve thereby reducing the influence of heat generated during welding on the bolt and the sleeve.
  • the backing plate portion 48 can be rotated to make the backing plate portion 48 reach a desired position, such as a position suitable for welding the radially outer side wall 484 and the housing body 1 or the radially outer side.
  • the wall 484 and the casing body 1 form a zero-interference fit position, thus reducing the accuracy requirements for the backing plate portion 48, making production more convenient and applicable to more types of scroll compressors.
  • Fig. 9a shows a partial longitudinal cross-sectional view of a scroll compressor according to a fourth embodiment of the present disclosure.
  • the scroll compressor according to the fourth embodiment of the present disclosure includes a housing body 1, a fixed scroll 2, a main The bearing seat 5 and an axial flexible installation mechanism, etc.
  • the axial flexible installation mechanism includes a bolt 57, a sleeve 59 located on the outer circumference of the bolt 57, and a backing plate 58 provided between the head 571 of the bolt 57 and the sleeve 59.
  • the structure and position of the fixed scroll 2, the main bearing housing 5, and the sleeve 59 are similar to those of the scroll compressor of the first embodiment described above, and therefore will not be repeated.
  • the backing plate portion 58 is not a separate component, but is formed integrally with the bolt 57.
  • the backing plate portion 58 is composed of a stop portion 572 of the bolt 57 extending radially outward from the outer circumference of the head 571 and an axial direction from the lower surface of the stop portion 572 toward the lug 26 of the fixed scroll 2 A cylindrical portion 583 extending on the upper surface is constituted.
  • the stop portion 572 has a radially outer side wall 584, and the radially outer side wall 584 is rigidly connected or clearance fit with the housing body 1.
  • the free end surface 587 of the cylindrical portion 583 forms a clearance fit with the upper end surface of the sleeve 59, and a certain gap is reserved between the upper surface of the lug 26 of the fixed scroll 2 and the fixed scroll 2 to move in the axial direction. the distance.
  • the backing plate portion 58 is integrated with the bolt 57, which reduces the number of parts and simplifies the installation and maintenance process. For the existing scroll compressor, only the bolts need to be replaced to obtain the effect of reducing the risk of sleeve sliding and the risk of bolt failure.
  • Fig. 10a shows a partial longitudinal cross-sectional view of a scroll compressor according to a modification of the fourth embodiment of the present disclosure.
  • the scroll compressor according to this modification includes a housing body 1, a fixed scroll 2, a main bearing seat 5, and an axial flexibility
  • the installation mechanism, etc., the axially flexible installation mechanism includes a bolt 67, a sleeve 69 located on the outer periphery of the bolt 67, and a backing plate portion 68 at least partially provided between the head 671 of the bolt 67 and the sleeve 69.
  • the structure and position of the fixed scroll 2, the main bearing housing 5, and the sleeve 69 are similar to those of the scroll compressor of the fourth embodiment described above, and therefore will not be described in detail.
  • the backing plate portion 68 is not a separate component, but is formed integrally with the bolt 67.
  • the backing plate portion 68 is composed of a stop portion 672 of the bolt 67 extending radially outward from the outer circumference of the head 671 and an axial direction from the lower surface of the stop portion 672 toward the lug 26 of the fixed scroll 2.
  • a cylindrical portion 683 extending on the upper surface is constituted.
  • the stop portion 672 has a radially outer side wall 684, and the radially outer side wall 684 is rigidly connected or clearance fit with the housing body 1.
  • the cylindrical portion 683 is configured as a hollow cylindrical portion so as to define a space for accommodating a part of the sleeve 69.
  • a part of the sleeve 69 (the part having the upper end surface) is inserted into the cylindrical portion 683 and forms a clearance fit with the inner wall of the cylindrical portion 683.
  • a certain gap is reserved between the free end surface 687 of the cylindrical portion 683 and the upper surface of the lug 26 of the fixed scroll 2 to provide a distance for the fixed scroll 2 to move in the axial direction.
  • the backing plate part can also be rigidly connected or clearance fit with other housing parts except the housing body to achieve the same purpose, such as the housing top cover, the sound-absorbing cover, and the like.
  • the components used to connect the fixed scroll and the main bearing seat in the axial flexible mounting mechanism are not limited to bolts, but may be screws or any other fasteners that can achieve similar functions.
  • the design of the backing plate can effectively reduce the load when the sleeve is subjected to the same radial load.
  • the scroll compressor according to the present disclosure can significantly improve the problems of sleeve sliding, bolts and failure of the main bearing housing.

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  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Abstract

La présente invention concerne un compresseur à volute, comprenant : un mécanisme de compression, le mécanisme de compression comprenant une volute fixe (2) et une volute mobile (3) et la volute mobile (3) étant configurée pour pouvoir tourner par rapport à la volute fixe (2) pour comprimer un fluide de travail ; un boîtier (1), le boîtier (1) définissant un espace interne pour recevoir le mécanisme de compression ; un siège de palier principal (5), le siège de palier principal (5) étant fixé au boîtier (1) et supportant la volute mobile (3) ; et un mécanisme d'installation flexible axial, la volute fixe (2) étant reliée au siège de palier principal (5) au moyen du mécanisme d'installation flexible axial pour permettre à la volute fixe (2) de se déplacer sur une distance prédéterminée dans la direction axiale. Le mécanisme d'installation flexible axial comprend : un élément de fixation (17 ; 27 ; 37 ; 47 ; 57 ; 67) ayant une tête (171 ; 271 ; 371 ; 571 ; 671), un manchon (19 ; 29 ; 39 ; 59 ; 69) disposée sur la périphérie externe de l'élément de fixation (17 ; 27 ; 37 ; 47 ; 57 ; 67) et une partie plaque de support (18 ; 28 ; 38 ; 48 ; 58 ; 68) disposée au moins partiellement entre la tête (171 ; 271 ; 371 ; 571 ; 671) de l'élément de fixation (17 ; 27 ; 37 ; 47 ; 57 ; 67) et le manchon (19 ; 29 ; 39 ; 59 ; 69) dans la direction axiale ; la partie de plaque de support (18 ; 28 ; 38 ; 48 ; 58 ; 68) peut être reliée au boîtier (1) ; et le boîtier (1) peut fournir un support radial pour la partie de plaque de support (18 ; 28 ; 38 ; 48 ; 58 ; 68). Le compresseur diminue à la fois le risque de coulissement du manchon et le risque de défaillance du boulon et du siège de palier principal provoqués par des ruptures.
PCT/CN2020/121427 2020-04-17 2020-10-16 Compresseur à volute WO2021208386A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202020583722.5 2020-04-17
CN202010305072.2A CN113530814A (zh) 2020-04-17 2020-04-17 涡旋压缩机
CN202020583722.5U CN212389516U (zh) 2020-04-17 2020-04-17 涡旋压缩机
CN202010305072.2 2020-04-17

Publications (1)

Publication Number Publication Date
WO2021208386A1 true WO2021208386A1 (fr) 2021-10-21

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WO (1) WO2021208386A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0932752A (ja) * 1995-07-17 1997-02-04 Toshiba Corp スクロール式圧縮機
US6345966B1 (en) * 2000-06-30 2002-02-12 Scroll Technologies Scroll compressor with dampening bushing
CN1670335A (zh) * 2004-03-15 2005-09-21 科普兰公司 带有阶式导向套筒的涡旋机
CN103114995A (zh) * 2011-11-16 2013-05-22 财团法人工业技术研究院 压缩机及其马达装置
CN108131292A (zh) * 2013-11-27 2018-06-08 艾默生环境优化技术有限公司 具有隔音特征的压缩机

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0932752A (ja) * 1995-07-17 1997-02-04 Toshiba Corp スクロール式圧縮機
US6345966B1 (en) * 2000-06-30 2002-02-12 Scroll Technologies Scroll compressor with dampening bushing
CN1670335A (zh) * 2004-03-15 2005-09-21 科普兰公司 带有阶式导向套筒的涡旋机
US20060233655A1 (en) * 2004-03-15 2006-10-19 Harry Clendenin Scroll machine with axially compliant mounting
CN103114995A (zh) * 2011-11-16 2013-05-22 财团法人工业技术研究院 压缩机及其马达装置
CN108131292A (zh) * 2013-11-27 2018-06-08 艾默生环境优化技术有限公司 具有隔音特征的压缩机

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