CN109519385B - Axial limit assembly of compressor, compressor and air conditioner - Google Patents
Axial limit assembly of compressor, compressor and air conditioner Download PDFInfo
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- CN109519385B CN109519385B CN201811490156.7A CN201811490156A CN109519385B CN 109519385 B CN109519385 B CN 109519385B CN 201811490156 A CN201811490156 A CN 201811490156A CN 109519385 B CN109519385 B CN 109519385B
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- compressor
- retainer ring
- axial
- pin shaft
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- 239000003831 antifriction material Substances 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 17
- 230000000670 limiting effect Effects 0.000 abstract description 62
- 238000000034 method Methods 0.000 description 27
- 230000000694 effects Effects 0.000 description 8
- 238000005299 abrasion Methods 0.000 description 7
- 230000005465 channeling Effects 0.000 description 7
- 238000009434 installation Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000013011 mating Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- F04C2240/00—Components
- F04C2240/60—Shafts
- F04C2240/605—Shaft sleeves or details thereof
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
The invention provides a compressor axial limiting assembly, a compressor and an air conditioner, wherein the compressor axial limiting assembly comprises: the crank pin shaft is used for driving a movable scroll of the compressor, and the shaft sleeve is sleeved on the crank pin shaft; the shaft sleeve comprises a first shaft section and a second shaft section which are connected in the axial direction, and the inner diameter of the first shaft section is smaller than that of the second shaft section so as to form a step surface at the joint of the inner walls of the first shaft section and the second shaft section; still include the retaining ring subassembly, the retaining ring subassembly can set up step face department, just the retaining ring subassembly can also with form axial spacing cooperation between the crank pin axle to it is spacing to carry out the axial to the axle sleeve. According to the invention, under the condition that the internal structural space of the compressor is limited, the axial movement of the shaft sleeve along the axial direction can be effectively prevented, the problem of part movement interference on the shaft is solved, and the stable running performance of the movable vortex plate is improved.
Description
Technical Field
The invention belongs to the technical field of compressors, and particularly relates to a compressor axial limiting assembly, a compressor and an air conditioner.
Background
The compressor is driven by a crankshaft, and the crankshaft is provided with a bearing, a rotor, a balance weight or a shaft sleeve and other parts to form a shafting together. The safety design of axial dimensions is needed to be considered among parts on the shafting, otherwise, the problems of assembly interference or upward channeling interference in shafting operation can occur. In order to prevent the part from moving, an axial limiting structure design can be carried out on the crankshaft to prevent the axial movement of the part on the shaft.
For example, in patent CN102165196B and patent CN201396285Y, the circlip for shaft is clamped on the outer groove of the crank pin shaft to axially limit the crankshaft sleeve, so as to prevent the sleeve from upward collision with the moving disc or the cross slip ring, and avoid unnecessary interference.
However, the installation space of the elastic retainer ring for the shaft is limited, or when the outer outline size of the clamp spring is larger than the outer diameter of the shaft sleeve or the inner diameter size of the bearing during assembly, the shaft sleeve is interfered with the bearing when being assembled in the bearing of the hub part of the movable disc, so that the problem of incapability of mounting is caused. The radial dimension of the retainer ring or the outer expansion dimension of the retainer ring during assembly cannot exceed the dimension of the bearing inner ring due to the adoption of the outer clamping retainer ring on the shaft, otherwise, the assembly is not satisfied. The outer snap ring thus requires a sufficiently large space in the radial direction to meet the assembly. If the radial dimension or the structural space is limited and the requirement of the assembly space cannot be met, the outer clamping type check ring cannot be used for axial limiting.
For example, the outer outline size of the installation clamping holes of the two protruding parts of the outer clamping type retainer ring for the shaft is larger, the space for installing the retainer ring is limited by the existing structure, and the arrangement of the outer clamping type retainer ring is not satisfied. At the moment, the axial space size and the radial space size of the hub bearing hole at the tail part of the movable disc are increased to meet the requirements of jump ring setting and installation, so that the axial and radial size structures of a prototype are increased, and the compact design of the compressor is not easy to realize.
Aiming at the problem, the limit structure of the invention is provided: an axial limiting structure is arranged on the basis of not changing the original space structure size, so that the upward movement of parts is prevented.
Because the compressor in the prior art can not prevent the movement interference of parts on the shaft under the condition that the structural space is limited or the installation space of an outer clamping ring for the shaft is insufficient, the running of the movable scroll is unstable, friction and high abrasion power consumption are caused by the contact of the upward movement parts, and the like, the invention designs the axial limiting assembly of the compressor, the compressor and the air conditioner.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that the compressor in the prior art cannot prevent the shifting interference of parts on the shaft under the condition of limited structural space, so as to provide the axial limiting assembly of the compressor, the compressor and the air conditioner.
The invention provides a compressor axial limit assembly, which comprises:
The crank pin shaft is used for driving a movable scroll of the compressor, and the shaft sleeve is sleeved on the periphery of the crank pin shaft;
The shaft sleeve comprises a first shaft section and a second shaft section which are connected in the axial direction, and the inner diameter of the first shaft section is smaller than that of the second shaft section so as to form a step surface at the joint of the inner walls of the first shaft section and the second shaft section;
still include the retaining ring subassembly, the retaining ring subassembly can set up step face department, just the retaining ring subassembly can also with form axial spacing cooperation between the crank pin axle, thereby right the axle sleeve is axially spacing.
Preferably, the method comprises the steps of,
The check ring assembly comprises an outer check ring and a first elastic check ring, wherein the outer check ring can form axial limit with the step surface, the elastic check ring can be assembled on the crank pin shaft, and the first elastic check ring is matched with the outer check ring to form limit with the outer check ring through the elastic check ring.
Preferably, the method comprises the steps of,
The crank pin shaft comprises a pin shaft body and more than two first protruding parts which are arranged on the axial end surface of the pin shaft body and extend out along the axial direction, and a first notch is formed between two adjacent first protruding parts;
The outer retainer comprises a first retainer body and a second protruding portion, the second protruding portion is arranged on the radial periphery of the first retainer body and protrudes outwards in the radial direction, and the second protruding portion can protrude from the first notch to form axial limit fit with the step surface.
Preferably, the method comprises the steps of,
The radial inner wall of the first protruding part is also provided with a groove in a circumferential extending manner, and the first elastic retainer ring can be elastically clamped into the groove to axially limit the outer retainer ring.
Preferably, the method comprises the steps of,
The first protruding portions are three in circumferential distribution, the first gaps are also three and are respectively formed between two adjacent first protruding portions, and the grooves are also three and are respectively formed on the radial inner wall of each first protruding portion.
Preferably, the method comprises the steps of,
The first elastic retainer ring is provided with a second notch, the second notch enables the first elastic retainer ring to form a disconnected structure in the circumferential direction, and a first operation hole is formed in the disconnected position.
Preferably, the method comprises the steps of,
The check ring assembly comprises a second elastic check ring, the second elastic check ring comprises a second check ring body and a third protruding portion, the third protruding portion is arranged on the radial periphery of the second check ring body and protrudes outwards in the radial direction, the second check ring body can be assembled on the crank pin shaft to form limiting, and the third protruding portion can be used for forming axial limiting with the step surface.
Preferably, the method comprises the steps of,
The crank pin shaft comprises a pin shaft body and more than two first protruding parts which are arranged on the axial end surface of the pin shaft body and extend outwards along the axial direction, a first gap is formed between two adjacent first protruding parts, and the third protruding parts can extend from the first gap to form axial limit fit with the step surface;
the radial inner wall of the first protruding part is also provided with a groove in a circumferential extending manner, and the second retainer ring body can be elastically clamped into the groove to axially limit the second retainer ring.
Preferably, the method comprises the steps of,
The second elastic retainer ring is characterized in that a third notch is formed in the second retainer ring body, the third notch enables the second retainer ring body to form a disconnected structure in the circumferential direction, and a second operation hole is formed in the disconnected position.
Preferably, the method comprises the steps of,
The check ring assembly comprises an elastic annular check ring, the annular check ring can be sleeved on the periphery of the crank pin shaft and located at the position of the step surface, the inner diameter of the annular check ring is smaller than the outer diameter of the crank pin shaft and in interference fit with the crank pin shaft, and the outer diameter of the annular check ring is larger than the inner diameter of the first shaft section.
Preferably, the method comprises the steps of,
The retainer ring assembly comprises an annular baffle and a threaded fastener, wherein the annular baffle can be matched with the step surface, and the annular baffle and the crank pin shaft can be fixed through the threaded fastener.
Preferably, the method comprises the steps of,
The annular baffle comprises a unthreaded hole in the middle of the annular baffle, a threaded hole opposite to the unthreaded hole is formed in the crank pin shaft, the threaded fastener is a screw, and the screw can pass through the threaded hole and the unthreaded hole simultaneously to fasten the annular baffle and the crank pin shaft.
Preferably, the method comprises the steps of,
The aperture of the light hole is larger than or equal to the aperture of the threaded hole; and/or, the end face of the crank pin shaft corresponding to the step face is flush with the step face or higher than the step face, so that when the annular baffle is abutted against the end face, the annular baffle is attached to the step face or is in clearance with the step face.
Preferably, the method comprises the steps of,
The step surface is made of wear-resistant or antifriction materials or subjected to wear-resistant and antifriction heat treatment; and/or, when the second bulge is included, the second bulge is made of wear-resistant or antifriction material or is subjected to wear-resistant and antifriction heat treatment; when the third bulge part is included, the third bulge part is made of wear-resistant or antifriction materials or is subjected to wear-resistant and antifriction heat treatment; when the annular baffle plate is included, the annular baffle plate is made of wear-resistant or antifriction materials or subjected to wear-resistant and antifriction heat treatment.
The invention also provides a compressor, which comprises the compressor axial limiting assembly according to any one of the previous claims, and further comprises a movable scroll, wherein the crank pin shaft is used for driving the movable scroll to rotate.
Preferably, the method comprises the steps of,
The crank pin shaft is connected between the crank shaft and the movable vortex disc, the first shaft section of the shaft sleeve is close to the crank shaft, and the second shaft section of the shaft sleeve is close to the movable vortex disc.
The invention also provides an air conditioner which comprises the compressor.
The axial limiting assembly of the compressor, the compressor and the air conditioner provided by the invention have the following beneficial effects:
According to the invention, the inner periphery of the shaft sleeve is provided with the step surface, the check ring assembly is arranged at the step surface in the shaft sleeve, the check ring assembly and the crank pin shaft are axially limited and matched, the check ring assembly can be axially limited through the crank pin shaft, and the shaft sleeve can be further limited and positioned along the axial direction through the step surface of the shaft sleeve matched with the check ring assembly, so that the shaft sleeve can be effectively prevented from axially moving under the condition that the internal structural space of the compressor is limited, the problem of part movement interference on the shaft is solved, and the stable running performance of the movable vortex plate is improved; and friction and abrasion generated by the upward channeling rotary contact of parts can be effectively reduced by adopting wear-resistant and antifriction materials or heat treatment of contact surfaces, and the performance of the compressor is further improved.
Drawings
FIG. 1 is a schematic view of a crank pin shaft portion of a prior art scroll compressor;
FIG. 2 is a schematic view showing the structure of a crank pin shaft portion in a scroll compressor according to embodiment 1 of the present invention;
FIG. 3 is a schematic cross-sectional view of the mating of the crank pin, sleeve and retainer ring assembly of FIG. 2;
FIG. 4 is a schematic view of the exploded construction of the components of FIG. 2;
FIG. 5 is a schematic view of the crankpin structure of FIG. 2;
FIG. 6 is a schematic view of the outer collar structure of FIG. 2;
FIG. 7 is a schematic view of an exploded view of the crankpin, sleeve and retainer ring assembly of example 2 of the present invention;
FIG. 8 is an axial top view of the structure of FIG. 7 (from one end of the second circlip);
FIG. 9 is a schematic view of the crankpin structure of FIG. 7;
FIG. 10 is a schematic view of the second circlip of FIG. 7;
FIG. 11 is a schematic cross-sectional view showing the mating structure of the crankpin, sleeve and retainer ring assembly of example 3 of the present invention;
fig. 12 is a schematic cross-sectional view showing the mating structure of the crank pin, sleeve and retainer ring assembly in embodiment 3 of the present invention.
The reference numerals in the drawings are as follows:
1. A crank pin shaft; 11. a pin body; 12. a first projection; 121. a groove; 13. a first notch; 14. a threaded hole; 15. an end face; 2. a shaft sleeve; 21. a first shaft section; 22. a second shaft section; 23. a step surface; 3. an outer retainer ring; 31. the first check ring body; 32. a second projection; 4. a first circlip; 41. a second notch; 42. a first operation hole; 5. the second elastic retainer ring; 51. the second check ring body; 52. a third projection; 53. a third notch; 54. a second operation hole; 6. an annular retainer ring; 7. an annular baffle; 71. a light hole; 8. a threaded fastener; 9. a crankshaft; 10. a movable scroll; 200. a bearing; 300. a cross slip ring; 400. and (3) a bracket.
Detailed Description
As shown in fig. 2-12, the present invention provides a compressor axial stop assembly comprising:
The crank pin shaft 1 is used for driving a movable scroll 10 of the compressor, and the shaft sleeve 2 is sleeved on the crank pin shaft 1;
The shaft sleeve 2 comprises a first shaft section 21 and a second shaft section 22 which are connected along the axial direction, and the inner diameter of the first shaft section 21 is smaller than that of the second shaft section 22 so as to form a step surface 23 at the joint of the inner walls of the first shaft section 21 and the second shaft section 22;
still include the retaining ring subassembly, the retaining ring subassembly can set up step face 23 department, just the retaining ring subassembly can also with form the spacing cooperation of axial between the crank pin axle 1, thereby with the axle sleeve 2 carries out the axial spacing.
According to the invention, the inner periphery of the shaft sleeve is provided with the step surface, the check ring assembly is arranged at the step surface in the shaft sleeve, the check ring assembly and the crank pin shaft are axially limited and matched, the check ring assembly can be axially limited through the crank pin shaft, and the shaft sleeve can be further limited and positioned along the axial direction through the step surface of the shaft sleeve matched with the check ring assembly, so that the shaft sleeve can be effectively prevented from axially moving under the condition that the internal structural space of the compressor is limited, the problem of part movement interference on the shaft is solved, and the stable running performance of the movable vortex plate is improved; and friction and abrasion generated by the upward channeling rotary contact of parts can be effectively reduced by adopting wear-resistant and antifriction materials or heat treatment of contact surfaces, and the performance of the compressor is further improved.
In order to solve a series of influence problems caused by upward movement of parts on the shaft of the conventional scroll compressor, a check ring is required to be arranged on a crank pin shaft system to prevent the parts from moving. The axial limiting structure provided by the invention can be used for solving the interference problem caused by the movement of parts on the shaft under the condition that the installation space is insufficient when the elastic retainer ring for the shaft is adopted aiming at the limitation of the structural space in consideration of the small-sized and compact-structure design.
Example 1 as shown in fig. 2-6, preferably,
The retainer ring assembly comprises an outer retainer ring 3 and a first elastic retainer ring 4, wherein the outer retainer ring 3 can be axially limited between the step surfaces 23, the first elastic retainer ring 4 can be assembled on the crank pin shaft 1, and the first elastic retainer ring 4 is matched with the outer retainer ring 3 (comprising joint setting and gap setting) so as to limit the outer retainer ring 3 through the first elastic retainer ring 4.
The axial limiting assembly has the structural form of the embodiment 1, namely, the axial limiting of the sleeve can be realized through the abutting joint between the outer retainer ring and the step surface of the sleeve through the matched structure of the outer retainer ring and the first elastic retainer ring, the axial limiting effect can be realized between the first elastic retainer ring and the crank pin shaft through the abutting joint of the first elastic retainer ring, the limiting effect can be realized on the outer retainer ring through the first elastic retainer ring, the effect of limiting the sleeve on the crank pin shaft along the axial direction is realized, the axial limiting function is improved, the limiting structure is effectively arranged inside the sleeve, the space of other structures inside the compressor is not occupied, and the space is compact.
Preferably, the method comprises the steps of,
The crank pin shaft 1 comprises a pin shaft body 11 and more than two first protruding parts 12 which are arranged on the axial end surface of the pin shaft body 11 and extend out along the axial direction, and a first notch 13 is formed between two adjacent first protruding parts 12;
The outer retainer 3 includes a first retainer body 31 and a second protruding portion 32, the second protruding portion 32 is disposed on the radial outer periphery of the first retainer body 31 and protrudes outwards in the radial direction, and the second protruding portion 32 can protrude from the first notch 13 to form an axial limit fit with the step surface 23.
The crank pin shaft and the outer retainer ring in the embodiment 1 of the invention are further preferably structured, namely, the crank pin shaft is provided with a first protruding part extending axially and a first notch formed between the adjacent first protruding parts, and the outer retainer ring is provided with a first retainer ring body and a second protruding part, so that the second protruding part of the outer retainer ring can extend into the position of the first notch, thereby extending to the position of the step surface of the shaft sleeve to perform an axial limiting function on the step surface, and the crank pin shaft is simple in structure, simple and convenient to process, and beneficial to axially limiting the shaft sleeve and free of occupied space.
Preferably, the method comprises the steps of,
The radial inner wall of the first protruding portion 12 is further provided with a groove 121 extending along the circumferential direction, and the first circlip 4 can be elastically clamped into the groove 121 to axially limit the outer retainer 3. The crank pin shaft of the first circlip in embodiment 1 of the present invention is a further preferred structural form, that is, a structural form in which a groove is formed in a radial inner wall of the first protrusion, so that the crank pin shaft can cooperate with the first circlip, and the first circlip is clamped into the groove, so as to axially limit the first circlip and prevent the first circlip from falling out in the axial direction, and the first circlip is disposed axially outside (on a side close to the orbiting scroll) the outer circlip, so that the outer circlip can be axially limited, and finally, the axial limiting effect on the shaft sleeve is realized, and space is saved.
The crank pin is provided with the counter bore (namely the first notch, the same applies below), the first bulge and the inner clamping groove (namely the groove, the same applies below) are arranged on the counter bore in the circumferential direction, and the axial limiting structure with the combination of the outer retaining ring with the limiting bulge and the inner clamping retaining ring (namely the first elastic retaining ring, the same applies below) is adopted, so that the problem of part movement interference on the shaft can be solved under the condition of limited structural space, and the stable running performance of the movable vortex plate is improved.
The limiting structure is split and consists of an outer retainer ring and an elastic retainer ring for holes (namely a first elastic retainer ring, which is the same as the first elastic retainer ring); the outer retainer ring is provided with a second protruding part which protrudes radially; the circlip for hole has the stress deformation recovery capability. Meanwhile, an inner clamping groove is formed in the crank pin shaft, and the hole elastic retainer ring can be embedded into the inner clamping groove.
Preferably, the method comprises the steps of,
The number of the first protrusions 12 is three, and the number of the first notches 13 is also three, and the grooves 121 are also three, and the grooves are respectively formed on the radial inner wall of each first protrusion 12, and the first notches are respectively formed between two adjacent first protrusions 12. The first bulge, the first notch and the grooves are further optimized in structural form and number, as shown in fig. 4-5, three first bulge, three first notch and three grooves distributed in the circumferential direction can form a limit effect on the first elastic retainer ring at three positions in the circumferential direction, and three second bulge of the outer retainer ring stretches into and forms three axial limit effects on the step surface of the shaft sleeve, so that the limit effect is improved.
Preferably, the method comprises the steps of,
The first circlip 4 has a second notch 41 thereon, the second notch 41 enables the first circlip 4 to form a disconnected structure in the circumferential direction, and a first operation hole 42 is provided at the disconnected position. This is a further preferred structural form of the first circlip according to embodiment 1 of the present invention, and the provision of the second notch can facilitate the control action of the elastic deformation of the first circlip, and the first operation hole can allow, for example, the insertion and kneading of the circlip pliers to reduce the outer diameter into the position of the groove, and release the elastic restoring force of the circlip pliers to expand and clamp the first circlip in the groove, thereby completing the assembly and forming an effective limiting action.
The axial limiting retainer ring structure of the embodiment 1 of the invention is split and consists of an outer retainer ring 3 and a hole elastic retainer ring (namely a first elastic retainer ring 4). The outer retainer 3 has second protruding portions 32, the second protruding portions 32 protruding radially, being circumferentially distributed on the outer peripheral surface of the first retainer body 31, and more than 32 protruding portions. In addition, the second protruding part 32 adopts wear-resistant and antifriction materials or contact surfaces to carry out wear-resistant and antifriction heat treatment, so that the problems of contact friction and abrasion caused by upward movement of the shaft sleeve 2, contact with the second protruding part 32 and rotation along with a shaft system are solved, the contact friction power consumption is reduced, and the compressor energy efficiency is improved. The first circlip 4 has the ability to deform under force and self-recover.
As shown in fig. 4, when the shaft sleeve 2 is assembled, after the shaft sleeve 1 is inserted into the crank pin shaft, the outer baffle ring 3 can be embedded into the counter bore (the first notch 13) of the crank pin shaft, the second protruding part 32 of the outer baffle ring 3 can radially extend out to the outer peripheral surface of the crank pin shaft 1 through the first notch 13 of the crank pin shaft 1, and the second protruding part 32 is blocked on the counter bore step surface of the shaft sleeve 2. Thereby acting to limit the upward movement of the sleeve 2. Then, after the first circlip 4 is pulled inwards by using the circlip pliers to reduce the outer diameter, the circlip is installed in the groove 121 on the crank pin shaft 1 to limit and fix the position of the outer circlip 3, so that the upward movement of the shaft sleeve 2 is further limited.
The axial limiting structure has the advantages of being detachable, convenient to disassemble, assemble and find, capable of timely replacing vulnerable parts, easy to maintain and the like.
Example 2 as shown in fig. 7-10, preferably,
The retainer ring assembly comprises a second retainer ring 5, the second retainer ring 5 comprises a second retainer ring body 51 and a third protruding portion 52, the third protruding portion 52 is arranged on the radial outer periphery of the second retainer ring body 51 and protrudes outwards in the radial direction, the second retainer ring body 51 can be assembled on the crank pin shaft 1 to form limiting, and the third protruding portion 52 can form axial limiting with the step surface 23.
The axial limiting assembly has the structural form of the embodiment 2, namely the axial limiting of the sleeve can be realized through the abutting between the third protruding part of the second elastic retainer ring and the step surface of the sleeve by the structural form of the second elastic retainer ring, the axial limiting function can be realized between the second retainer ring body of the second elastic retainer ring and the crank pin shaft, the effect of axially limiting the sleeve on the crank pin shaft is further realized, the function of improving the axial limiting is realized, and the limiting structure is effectively arranged inside the sleeve without occupying the space of other structures inside the compressor, so that the space is compact.
Preferably, the method comprises the steps of,
The crank pin 1 comprises a pin body 11 and more than two first protruding parts 12 which are arranged on the axial end surface of the pin body 11 and extend outwards along the axial direction, a first notch 13 is formed between two adjacent first protruding parts 12, and the third protruding part 52 can extend from the first notch 13 to form axial limit fit with the step surface 23;
The radial inner wall of the first protruding portion 12 is further provided with a groove 121 extending along the circumferential direction, and the second circlip body 51 can be elastically clamped into the groove 121 to axially limit the second circlip 5.
The crank pin shaft and the second circlip in the embodiment 2 of the present invention are further preferably configured in such a manner that the crank pin shaft is provided with a first protruding portion extending axially and a first gap formed between adjacent first protruding portions, and a third protruding portion of the second circlip can extend into the position of the first gap, thereby further extending to the position of the step surface of the shaft sleeve, so as to perform an axial limiting function on the step surface, and the crank pin shaft is simple in structure, simple and convenient to process, and beneficial to performing axial limiting on the shaft sleeve without occupying space; the groove is formed in the radial inner wall of the first protruding portion, the groove can be matched with the second retainer ring body, the second retainer ring body is clamped into the groove, so that the second retainer ring is axially limited, the second retainer ring is prevented from being axially separated, the first retainer ring is arranged on the outer axial side (one side close to the movable vortex disc) of the step surface of the shaft sleeve, the axial limiting effect on the shaft sleeve is finally achieved, and space is saved.
Preferably, the method comprises the steps of,
The second circlip body 51 of the second circlip 5 has a third notch 53 thereon, the third notch 53 enables the second circlip body 51 to form a disconnected structure in the circumferential direction, and a second operation hole 54 is provided at the disconnected position. This is a further preferred structural form of the second circlip according to embodiment 2 of the present invention, and the provision of the third notch can facilitate the control action of the elastic deformation of the second circlip, and the second operation hole can allow, for example, the insertion and kneading of the circlip pliers to reduce the outer diameter into the position of the groove, and release the elastic restoring force of the circlip pliers to expand and clamp the second circlip in the groove, thereby completing the assembly and forming an effective limiting action.
The limit retainer (i.e., the second circlip) of embodiment 2 is of an integral structure, and has a protrusion (i.e., the third protrusion, the same applies hereinafter) and an annular body (i.e., the second retainer body, the same applies hereinafter). The protruding part can radially extend out through an annular concave part formed on the crank pin shaft. The annular body has elastic retainer ring force deformation and self deformation recovery capability for the hole.
As shown in fig. 7, the assembly process is basically the same as that of the embodiment 1, and when the second circlip 5 is assembled, the circlip body 51 is pulled, pressed and deformed inwards by adopting a circlip pliers, so that the outer diameter of the annular part is reduced and then is clamped in the groove 121 on the crank pin shaft 1, and the position of the second circlip 5 is limited and fixed; meanwhile, the third protruding part 52 can radially extend out through the first notch 13 formed on the corresponding crank pin shaft 1 to prevent the shaft sleeve 2 on the crank pin shaft 1 from upwards moving, so that the effect of limiting the shaft sleeve 2 from upwards moving is achieved. The axial limiting structure has the advantage of easy disassembly.
Example 3 as shown in fig. 11, preferably,
The retainer ring assembly comprises an elastic annular retainer ring 6, the annular retainer ring 6 can be sleeved on the periphery of the crank pin shaft 1 and located at the position of the step surface 23, the inner diameter of the annular retainer ring 6 is smaller than the outer diameter of the crank pin shaft 1 and forms interference fit with the crank pin shaft 1, and the outer diameter of the annular retainer ring 6 is larger than the inner diameter of the first shaft section 21.
The axial limiting assembly has the structural form of the embodiment 3, namely, the axial limiting assembly has the structural form of the elastic annular retainer ring, the axial limiting of the sleeve can be realized through the abutting joint between the annular retainer ring and the step surface of the sleeve, the axial limiting effect can be realized through the interference fit between the annular retainer ring and the crank pin shaft, the effect of axially limiting the sleeve on the crank pin shaft is further realized, the axial limiting function is improved, the limiting structure is effectively arranged inside the sleeve, and the space of other structures inside the compressor is not occupied, so that the space is compact. The limit retainer ring in embodiment 3 may be a ring, and the ring may be directly interference-fitted on the outer periphery of the pin shaft, so as to prevent the pin shaft sleeve from channeling.
Example 4 as shown in fig. 12, preferably,
The retainer ring assembly comprises an annular baffle 7 and a threaded fastener 8, wherein the annular baffle 7 can be matched with the step surface 23 (comprising joint arrangement and gap arrangement), the annular baffle is jointed with the end surface 15 of the crank pin shaft, and the annular baffle 7 and the crank pin shaft 1 are fixed through the threaded fastener 8.
The axial limiting assembly has the structural form of the embodiment 4, namely the axial limiting assembly can axially limit the sleeve through the abutting joint between the annular baffle and the step surface of the shaft sleeve and through the structural form of the annular baffle and the form of the threaded fastener, and the annular baffle can be fixed on the crank pin shaft through the threaded fastener to play the role of axially limiting the shaft sleeve on the crank pin shaft along the axial direction, so that the axial limiting assembly has the function of improving the axial limiting, and effectively arranging the limiting structure inside the shaft sleeve without occupying the space of other structures inside the compressor, thereby ensuring the space to be compact.
Preferably, the method comprises the steps of,
The annular baffle 7 comprises a light hole 71 positioned in the middle of the annular baffle 7, a threaded hole 14 opposite to the light hole 71 is formed in the crank pin shaft 1, and the threaded fastener 8 is a screw which can pass through the threaded hole 14 and the light hole 71 at the same time to fasten the annular baffle 7 and the crank pin shaft 1. The annular baffle plate, the crank pin shaft and the threaded fastener are in a preferable structural form, namely, the center of the annular baffle plate 7 is provided with a unthreaded hole which is larger than the screw thread, the crank pin shaft 1 is provided with a threaded hole, and the annular baffle plate 7 can be directly fastened on the end surface of the crank pin shaft 1 by adopting the screw so as to achieve upward movement of the limiting shaft sleeve 2.
Preferably, the method comprises the steps of,
The aperture of the light hole 71 is larger than or equal to the aperture of the screw hole 14; and/or, the end surface 15 of the crank pin 1 corresponding to the step surface 23 is flush with the step surface 23 or higher than the step surface 23, so that when the annular baffle 7 abuts against the end surface 15, the annular baffle 7 abuts against the step surface 23 or forms a gap with the step surface 23.
The hole diameter of the unthreaded hole is larger than that of the threaded hole, the threaded hole and the crank pin shaft are larger than that of the crank pin shaft when the threaded hole passes through the annular baffle plate to be fastened, the limit function of the annular baffle plate on the step surface of the shaft sleeve is achieved, after the assembly is completed, the end surface of the crank pin shaft can be flush with the step surface or lower than the step surface, and the annular baffle plate is limited on the step surface and is in fit with the step surface, so that the end surface of the crank pin shaft can be flush with the step surface or lower than the step surface in order to prevent the annular baffle plate from being in fit with the step surface and not exceeding the step surface, and a gap can exist between the end surface of the crank pin shaft and the arc baffle plate, so that the requirements of fastening and axial limiting are met.
The limit retainer ring in embodiment 4 may be a circular baffle, and the baffle may be directly fastened on the end surface of the pin shaft by using threads, so as to achieve upward movement of the limit shaft sleeve.
Preferably, the method comprises the steps of,
The step surface 23 is made of wear-resistant or antifriction materials or subjected to wear-resistant and antifriction heat treatment; and/or, when the second protrusion 32 is included, the second protrusion 32 is made of a wear-resistant or antifriction material, or is subjected to a wear-resistant and antifriction heat treatment; when the third protruding portion 52 is included, the third protruding portion 52 is made of a wear-resistant or antifriction material, or is subjected to wear-resistant and antifriction heat treatment; when the annular baffle plate 7 is included, the annular baffle plate 7 is made of wear-resistant or antifriction materials or subjected to wear-resistant and antifriction heat treatment. The limiting protruding part adopts wear-resistant and antifriction materials or contact surface heat treatment, friction and abrasion generated by upward channeling rotation contact of parts can be effectively reduced, and the performance of the compressor is improved.
The invention also provides a compressor (preferably a scroll compressor) which comprises the compressor axial limiting assembly, further comprises a movable scroll 10 and a crankshaft 9, wherein the crank pin shaft 1 is connected between the crankshaft 9 and the movable scroll 10 to drive the movable scroll 10 to rotate. According to the invention, the inner periphery of the shaft sleeve is provided with the step surface, the check ring assembly is arranged at the step surface in the shaft sleeve, the check ring assembly and the crank pin shaft are axially limited and matched, the check ring assembly can be axially limited through the crank pin shaft, and the shaft sleeve can be further limited and positioned along the axial direction through the step surface of the shaft sleeve matched with the check ring assembly, so that the shaft sleeve can be effectively prevented from axially moving under the condition that the internal structural space of the compressor is limited, the problem of part movement interference on the shaft is solved, and the stable running performance of the movable vortex plate is improved; and friction and abrasion generated by the upward channeling rotary contact of parts can be effectively reduced by adopting wear-resistant and antifriction materials or heat treatment of contact surfaces, and the performance of the compressor is further improved.
Preferably, the method comprises the steps of,
The first shaft section 21 of the sleeve 2 is arranged close to the crankshaft 9 and the second shaft section 22 is arranged close to the orbiting scroll 10. The first shaft section and the second shaft section of the shaft sleeve are in a preferable position relation, namely, a section with a large inner diameter is close to the movable vortex disc, so that a limiting structure is assembled at the position to prevent the shaft sleeve from upwards moving to collide with the movable vortex disc and other structures, and the safety and the reliability of the compressor are provided.
The invention also provides an air conditioner which comprises the scroll compressor. According to the invention, the retaining ring assembly is arranged, the axial limit is formed on the retaining ring assembly through the crank pin shaft, and the axial limit and positioning effect is further formed on the shaft sleeve through the step surface of the shaft sleeve matched with the retaining ring assembly, so that the shaft sleeve can be effectively prevented from moving along the axial direction under the condition that the internal structural space of the compressor is limited, the problem of part movement interference on the shaft is solved, and the stable running performance of the movable vortex disc is improved; and friction and abrasion generated by the upward channeling rotary contact of parts can be effectively reduced by adopting wear-resistant and antifriction materials or heat treatment of contact surfaces, and the performance of the compressor is further improved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention. The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (8)
1. The utility model provides a spacing subassembly of compressor axial which characterized in that: comprising the following steps:
The crank pin shaft (1) and the shaft sleeve (2), wherein the crank pin shaft (1) is used for driving a movable scroll (10) of the compressor, and the shaft sleeve (2) is sleeved on the crank pin shaft (1);
The shaft sleeve (2) comprises a first shaft section (21) and a second shaft section (22) which are connected along the axial direction, wherein the inner diameter of the first shaft section (21) is smaller than that of the second shaft section (22) so as to form a step surface (23) at the joint of the inner walls of the first shaft section (21) and the second shaft section (22);
the device further comprises a check ring assembly, wherein the check ring assembly can be arranged at the step surface (23), and can also form axial limit fit with the crank pin shaft (1), so that the shaft sleeve (2) is axially limited;
the check ring assembly comprises an outer check ring (3) and a first elastic check ring (4), wherein the outer check ring (3) can form axial limit with the step surface (23), the first elastic check ring (4) can be assembled on the crank pin shaft (1), and the first elastic check ring (4) and the outer check ring (3) are matched for arrangement so as to form limit for the outer check ring (3) through the first elastic check ring (4); the crank pin shaft (1) comprises a pin shaft body (11) and more than two first protruding parts (12) which are arranged on the axial end surface of the pin shaft body (11) and extend out along the axial direction, and a first notch (13) is formed between two adjacent first protruding parts (12); the outer retainer ring (3) comprises a first retainer ring body (31) and a second bulge (32), the second bulge (32) is arranged on the radial periphery of the first retainer ring body (31) and extends outwards in the radial direction, and the second bulge (32) can extend out of the first notch (13) to form axial limit fit with the step surface (23); the radial inner wall of the first bulge (12) is also provided with a groove (121) extending along the circumferential direction, and the first elastic retainer ring (4) can be elastically clamped into the groove (121) to axially limit the outer retainer ring (3); or alternatively;
the retainer ring assembly comprises a second retainer ring (5), the second retainer ring (5) comprises a second retainer ring body (51) and a third protruding part (52), the third protruding part (52) is arranged on the radial periphery of the second retainer ring body (51) and protrudes outwards in the radial direction, the second retainer ring body (51) can be assembled on the crank pin shaft (1) to form limit, and the third protruding part (52) can form axial limit with the step surface (23); the crank pin shaft (1) comprises a pin shaft body (11) and more than two first protruding parts (12) which are arranged on the axial end surface of the pin shaft body (11) and extend outwards along the axial direction, a first notch (13) is formed between two adjacent first protruding parts (12), and a third protruding part (52) can extend from the first notch (13) to form axial limit fit with the step surface (23); the radial inner wall of the first protruding part (12) is also provided with a groove (121) extending along the circumferential direction, and the second elastic retainer ring body (51) can be elastically clamped into the groove (121) to axially limit the second elastic retainer ring (5).
2. The compressor axial stop assembly of claim 1, wherein:
The number of the first protruding parts (12) is three along the circumferential direction, the number of the first notches (13) is also three, the first notches are respectively formed between two adjacent first protruding parts (12), and the number of the grooves (121) is also three, and the grooves are respectively formed on the radial inner wall of each first protruding part (12).
3. The compressor axial stop assembly of claim 1, wherein:
The first circlip (4) is provided with a second notch (41), the second notch (41) enables the first circlip (4) to form a disconnected structure in the circumferential direction, and a first operation hole (42) is arranged at the position of the disconnected structure.
4. The compressor axial stop assembly of claim 1, wherein:
The second circlip body (51) of the second circlip (5) is provided with a third notch (53), the third notch (53) enables the second circlip body (51) to form a disconnected structure in the circumferential direction, and a second operation hole (54) is arranged at the position of the disconnected structure.
5. The compressor axial stop assembly of any one of claims 1-4, wherein:
The step surface (23) is made of wear-resistant or antifriction materials or is subjected to wear-resistant and antifriction heat treatment; and/or, when comprising a second protrusion (32), the second protrusion (32) is made of a wear-resistant or antifriction material, or is subjected to a wear-resistant and antifriction heat treatment; when a third protrusion (52) is included, the third protrusion (52) is made of a wear-resistant or antifriction material or subjected to a wear-resistant and antifriction heat treatment.
6. A compressor, characterized in that: comprising the compressor axial limit assembly of any one of claims 1-5, further comprising an orbiting scroll (10), said crank pin shaft (1) being configured to drive said orbiting scroll (10) in rotation.
7. The compressor as set forth in claim 6, wherein:
the novel crank shaft comprises a crank shaft (9), and is characterized in that the crank shaft (1) is connected between the crank shaft (9) and the movable scroll (10), the first shaft section (21) of the shaft sleeve (2) is arranged close to the crank shaft (9), and the second shaft section (22) is arranged close to the movable scroll (10).
8. An air conditioner, characterized in that: comprising a compressor according to claim 6 or 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811490156.7A CN109519385B (en) | 2018-12-06 | 2018-12-06 | Axial limit assembly of compressor, compressor and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811490156.7A CN109519385B (en) | 2018-12-06 | 2018-12-06 | Axial limit assembly of compressor, compressor and air conditioner |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110319016B (en) * | 2019-07-04 | 2021-08-17 | 珠海格力节能环保制冷技术研究中心有限公司 | Axial limiting assembly, scroll compressor and air conditioner |
| CN110762187A (en) * | 2019-11-11 | 2020-02-07 | 南京高速齿轮制造有限公司 | Stopping structure between torque arm and elastic pin shaft and wind power gear box |
| CN111097332A (en) * | 2020-01-03 | 2020-05-05 | 黄骅市康田医疗器械有限公司 | Material cylinder connecting chuck for mixer and mixer |
| CN111664166A (en) * | 2020-05-25 | 2020-09-15 | 中国航发沈阳发动机研究所 | Pin shaft connecting structure |
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| CN206092405U (en) * | 2016-09-22 | 2017-04-12 | 艾默生环境优化技术(苏州)有限公司 | Scroll compressor having a plurality of scroll members |
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| JP2007270763A (en) * | 2006-03-31 | 2007-10-18 | Hitachi Ltd | Scroll type fluid machine |
| CN203322221U (en) * | 2013-05-06 | 2013-12-04 | 东风商用车有限公司 | Hydraulic vibration reduction driving belt pulley |
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