CN109555694B - Piston limit structure, compressor and heat exchange equipment - Google Patents
Piston limit structure, compressor and heat exchange equipment Download PDFInfo
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- CN109555694B CN109555694B CN201811555294.9A CN201811555294A CN109555694B CN 109555694 B CN109555694 B CN 109555694B CN 201811555294 A CN201811555294 A CN 201811555294A CN 109555694 B CN109555694 B CN 109555694B
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- limiting
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- 230000000670 limiting effect Effects 0.000 claims abstract description 95
- 230000004323 axial length Effects 0.000 claims abstract description 9
- 230000000149 penetrating effect Effects 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 7
- 238000007789 sealing Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000011031 large-scale manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Classifications
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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
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
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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
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
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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
- F04C2240/00—Components
- F04C2240/20—Rotors
-
- 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
- F04C2240/30—Casings or housings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
Abstract
The invention relates to the field of compressors, and particularly provides a piston limiting structure, a compressor and heat exchange equipment. The piston limit structure includes: the cylinder is provided with a piston hole perpendicular to the axial direction of the cylinder, the piston hole is round, the inner wall of the piston hole is provided with a sliding groove, and the two ends of the sliding groove do not penetrate through the outer side wall of the cylinder along the axial length of the piston hole; and the piston is arranged in the piston hole and can slide back and forth in the piston hole, a limiting piece is arranged on the side wall of the piston, and when the piston is assembled with the cylinder, the limiting piece can slide in the chute and is in butt fit with the side wall of the chute so as to limit the piston to rotate around the axial direction of the piston. The piston limiting mechanism provided by the invention can not introduce clearance volume, and has a better limiting effect on the piston.
Description
Technical Field
The invention relates to the field of compressors, in particular to a piston limiting structure, a compressor and heat exchange equipment.
Background
The rotary cylinder piston compressor is a compressor working based on the cross slide block principle, a cylinder of the rotary cylinder piston compressor rotates in a cylinder sleeve, a piston is transversely arranged in a piston hole of the cylinder and slides back and forth in the piston hole, and therefore a compression cavity is formed among the end face of the piston, the side wall of the piston hole and the inner wall of the cylinder sleeve.
In order to ensure the fit and applicability between the piston and the piston bore, it is apparent from a manufacturing point of view that a piston with a circular piston bore and a cylindrical cross section is optimal, and it is easiest to ensure the machining accuracy. However, in this case, since the piston hole is laterally provided in the cylindrical piston, both end edges of the piston hole are actually intersecting lines of two cylinders, and thus the length is continuously varied in all circumferential directions. Likewise, the two end edges of the piston are intersecting lines of two cylinders (coinciding with the two end edges of the piston bore), and the length of the piston along its circumference varies continuously. Ideally, the generatrix of the piston head (i.e., the end face) should be parallel to the generatrix of the cylinder outer surface so that the piston can perfectly conform to the inner wall of the cylinder liner at the end of the reciprocating motion (i.e., the piston end face and the cylinder outer surface constitute a finished cylindrical surface) to complete the exhaust. However, in practice, when a piston with a circular cross section is adopted, the piston rotates relative to the cylinder during operation, and as the lengths of the piston and the piston hole along the circumferential direction are continuously changed, once the piston and the piston hole rotate relatively, the end face of the piston and the outer surface of the cylinder cannot form a complete cylindrical surface, and interference between the head of the piston and the inner wall of the cylinder sleeve can be caused during compression of the piston, so that the cylinder is collided.
In order to solve the problem that a circular piston can generate a cylinder collision, two schemes are adopted in the prior art to improve a rotary cylinder piston compressor.
Firstly, the piston hole of the cylinder is required to be correspondingly arranged into a non-circular shape by adopting a non-circular piston, and the non-circular structure has poor processing manufacturability, is not beneficial to large-scale production, is difficult to process and has difficult precision guarantee. And moreover, a plurality of gear matching sizes exist on the matching surface of the piston and the cylinder, such as the diameter of the outer circle of the two non-circular sections, the center distance of the semi-circular surfaces, the length of the parallel section, the width of the piston and the like, so that the matching clearance between the piston and the cylinder is difficult to ensure in the assembling process, and the assembling and the performance of the compressor are influenced. And the parallel sections of the non-circular piston have larger deformation during actual operation, which affects the reliability of the compressor.
Secondly, a limiting structure is additionally arranged on the axial direction of the round piston so as to limit the piston to rotate, specifically, a pin is arranged on the axial surface of the round piston, a pin clearance groove which penetrates is formed in the position corresponding to the piston hole of the cylinder, and the piston is limited through the pin and the clearance groove so as to prevent the piston from rotating. However, in this solution, although the piston is a circular piston, the corresponding piston hole is in fact non-circular due to the arrangement of the through clearance groove, which cooperates with the pin, so that the end of the clearance groove is located in the suction and discharge chamber, which affects the suction and discharge process of the pump body, while at the same time introducing a natural clearance volume at the compression end. And the pin and the clearance groove are matched between the two compression cavities, so that the two cavities are required to be sealed, the cylinder is in a finish machining position, and special machining processes such as wire cutting and the like which are not beneficial to large-scale production still need to be used for the cylinder. Therefore, how to solve the problem of cylinder collision of the circular piston has become an important research direction for improving the rotary cylinder piston compressor.
Disclosure of Invention
The invention provides a piston limiting structure which can prevent the piston from rotating and has high matching precision and can not introduce a clearance volume, and aims to solve the technical problems that in the prior art, the piston head part interferes with the inner wall of a cylinder sleeve or even collides with the cylinder, and meanwhile, the limiting structure between the piston and the cylinder can introduce a natural clearance volume.
Meanwhile, in order to solve the technical problems that a clearance volume is introduced into a circular piston limiting structure in the existing rotary cylinder piston compressor and the requirement on a processing technology is high, the invention provides a compressor adopting a circular piston, wherein the clearance volume is not introduced into the compressor.
Furthermore, in order to solve the similar technical problems, the invention also provides heat exchange equipment.
In a first aspect, the present invention provides a piston limit structure comprising:
The piston hole is perpendicular to the axial direction of the cylinder and penetrates through the cylinder, the projection of the piston hole in the penetrating direction is circular, a sliding groove axially arranged along the piston hole is formed in the inner wall of the piston hole, and two ends of the sliding groove do not penetrate through the outer side wall of the cylinder in the axial length of the piston hole; and
The piston is arranged in the piston hole in a shape fit manner and can slide back and forth in the piston hole, a limiting piece is arranged on the side wall of the piston, and when the piston is assembled with the cylinder, the limiting piece can slide in the sliding groove and be in butt fit with the side wall of the sliding groove so as to limit the piston to rotate around the axial direction of the piston.
The end face of the cylinder is provided with an assembly hole penetrating through the piston hole, and one end, far away from the outer circumferential surface of the cylinder, of the sliding groove penetrates through the assembly hole.
And a limiting groove is formed in the side wall of the position, corresponding to the sliding groove, of the piston, the limiting piece is assembled with the limiting groove in a shape fit manner, and when the piston is assembled with the cylinder, one end of the limiting piece is positioned in the limiting groove, and the other end of the limiting piece is positioned in the sliding groove.
The assembly hole penetrates through the cylinder to enable the rotating shaft to pass through, and the section of the assembly hole is circular and concentric with the end face of the cylinder.
The position of the sliding groove in the cylinder corresponds to 1/2 of the radial length of the piston hole.
When the piston is assembled with the cylinder, the following conditions are satisfied:
L＜R1-R2-S
Wherein L is the shortest distance between one end of the limit groove along the axial direction of the piston and the end surface of the piston, R 1 is the radius of the end surface of the cylinder, R 2 is the radius of the section of the assembly hole, and S is the sliding stroke of the piston in the cylinder.
When the piston is assembled with the cylinder, the following conditions are satisfied:
L′≤L
Wherein L' is the shortest distance between one end of the chute far away from the assembly hole and the outer side wall of the cylinder.
The piston is provided with a shaft hole penetrating along the axial direction of the cylinder, and the shaft hole is positioned at the position of 1/2 of the axial length of the piston.
The sliding groove is arranged on at least one of the front side and the rear side of the shaft hole along the axis direction of the piston.
The limiting piece is a limiting plate.
The limiting piece is a cylindrical limiting pin.
In a second aspect, the present invention provides a compressor comprising:
A rotating shaft;
according to the piston limiting structure, the rotating shaft sequentially penetrates out of the air cylinder and the piston, and the rotating shaft drives the piston and the air cylinder to rotate; and
And the cylinder sleeve is arranged in the cylinder sleeve and rotates in the cylinder sleeve.
In a third aspect, the present invention provides a heat exchange device, including the above-mentioned piston limit structure.
The heat exchange equipment is an air conditioner.
The technical scheme of the invention has the following beneficial effects:
1) The piston limiting structure comprises the cylinder, the piston and the limiting piece, wherein the cylinder is provided with the piston hole which is perpendicular to the axis direction of the cylinder and penetrates through the cylinder, the projection of the piston hole in the penetrating direction is circular, the piston is arranged in the piston hole in a shape matching manner and can slide back and forth in the piston hole, the circular piston and the circular piston hole are adopted, the manufacturability of the piston and the cylinder is good, the processing is convenient, the processing precision is ensured, the large-scale production is easy, the distance from the piston hole of the cylinder to the end face of the cylinder is uniform and transited, the structure is firmer and not easy to deform, meanwhile, the circular piston is matched with the circular cylinder piston hole, the assembly gap between the piston and the cylinder is favorably controlled, the friction power consumption is favorably reduced, the leakage is reduced, and the performance of the piston compressor is improved. The inner wall of the piston hole is provided with the sliding groove axially arranged along the piston hole, the two ends of the sliding groove do not penetrate through the outer side wall of the cylinder, a clearance groove does not exist between the end face of the piston and the inner wall of the cylinder, the limiting surface is not communicated with the volume cavity, and clearance volume can not be introduced, so that the rotary cylinder compressor works more stably. The piston side wall is provided with a limiting part, and the limiting part can slide in the chute and is abutted with the chute side wall to limit the piston to axially rotate around the piston. The limiting piece arranged on the piston is matched with the sliding groove on the cylinder, so that the workpiece is convenient to assemble, the machining and production are easy, meanwhile, the gear matching size between the piston and the cylinder is reduced, the fit clearance between the piston and the cylinder is effectively controlled, the friction power consumption between the piston and the cylinder is reduced, and the performance of the compressor is improved.
2) According to the piston limiting structure provided by the invention, the end face of the cylinder is provided with the assembly hole penetrating through the piston hole, one end of the chute, which is far away from the outer peripheral surface of the cylinder, penetrates through the assembly hole, and one end of the chute penetrates through the assembly hole, so that the assembly of the limiting part is facilitated, meanwhile, the processing position of the chute is reduced, and the processing of the cylinder is facilitated.
3) According to the piston limiting structure provided by the invention, the limiting groove is formed in the side wall of the position, corresponding to the sliding groove, of the piston, the limiting piece is assembled with the limiting groove in a matched mode, when the piston is assembled with the cylinder, one end of the limiting piece is located in the limiting groove, the other end of the limiting piece is located in the sliding groove, and the limiting piece can slide in the sliding groove in a reciprocating mode through the assembly of the limiting piece and the piston, the side wall of the limiting piece is abutted with the side wall of the sliding groove, so that the piston is limited, and the limiting structure is simple and stable.
4) According to the piston limiting structure provided by the invention, the assembly hole penetrates through the cylinder for the rotating shaft to pass through, the section of the assembly hole is circular and concentric with the end face of the cylinder, and the position of the sliding groove in the cylinder corresponds to 1/2 of the radial length of the piston hole, so that the processing of the limiting groove and the sliding groove is facilitated.
5) The piston limiting structure provided by the invention, when the piston is assembled with the cylinder, satisfies the following conditions: l is less than R 1-R2 -S, wherein L is the shortest distance between one end of the limit groove along the axial direction of the piston and the end face of the piston, R 1 is the radius of the end face of the cylinder, R 2 is the radius of the section of the assembly hole, and S is the sliding stroke of the piston in the cylinder. When the formula is satisfied, the limiting piece cannot be separated from the sliding groove when sliding in the sliding groove, so that the reliability of the limiting structure is ensured.
6) The piston limiting structure provided by the invention, when the piston is assembled with the cylinder, satisfies the following conditions: l '. Ltoreq.L, wherein L' is the shortest distance of one end of spout far away from the pilot hole from the cylinder lateral wall. When the formula is met, the limiting piece cannot strike the cylinder when sliding to the stroke limit position in the sliding groove, so that the limiting structure is more stable and reliable.
7) According to the piston limiting structure provided by the invention, the piston is provided with the shaft hole penetrating along the axial direction of the cylinder, the shaft hole is positioned at the 1/2 position of the axial length of the piston, and the chute is arranged on at least one of the front side and the rear side of the shaft hole along the axial direction of the piston. The limit structure can be arranged on the piston in one or more ways, and the limit effect is better.
8) The compressor provided by the invention comprises the rotating shaft, the piston limiting structure and the cylinder sleeve, wherein the cylinder and the piston are provided with the shaft holes penetrating along the axial direction of the cylinder, and the cylinder is arranged in the cylinder sleeve and is driven to rotate by the rotating shaft.
9) The heat exchange equipment provided by the invention comprises the piston limiting structure, so that the heat exchange equipment has all the beneficial effects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is an exploded view of a compressor in one embodiment provided by the present invention;
FIG. 2 is a schematic diagram of a piston structure in one embodiment provided by the present invention;
FIG. 3 is a schematic view of a cylinder structure according to an embodiment of the present invention;
FIG. 4 is a sectional view showing an assembled structure of a compressor according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of the operation of one embodiment provided by the present invention;
FIG. 6 is a schematic view of a stopper, piston and cylinder in a second embodiment of the present invention;
FIG. 7 is a sectional view showing an assembled structure of a compressor in accordance with a second embodiment of the present invention;
FIG. 8 is a schematic view of a third embodiment of a stop, piston and cylinder according to the present invention;
FIG. 9 is an assembled cross-sectional view of a spacing structure according to a third embodiment of the present invention;
FIG. 10 is an assembled cross-sectional view of a spacing structure according to a fourth embodiment of the present invention;
FIG. 11 is an assembled cross-sectional view of a spacing structure according to a fifth embodiment of the present invention;
FIG. 12 is an assembled cross-sectional view of a spacing structure according to a sixth embodiment of the present invention;
FIG. 13 is an assembled cross-sectional view of a limit structure according to a seventh embodiment of the present invention
Reference numerals illustrate:
1-a cylinder; 11-piston bore; 12-fitting holes; 13-a limit groove; 2-a piston; 21-a chute; 22-shaft holes; 3-limiting parts; 4-an upper flange; 5-a lower flange; 6-rotating shaft; 7-cylinder liner.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. In addition, the technical features mentioned in the different embodiments of the invention described below can be combined with one another as long as they do not conflict with one another.
The rotary cylinder piston compressor in the prior art comprises a flange, a cylinder sleeve, a cylinder, a piston and a rotating shaft, and the piston can slide back and forth relative to the cylinder in the rotating process based on the cross slide block principle, so that a compression cavity and an exhaust cavity are formed between the two ends of the piston and the cylinder sleeve. Therefore, for the piston of the rotary cylinder piston compressor, the degree of freedom of the piston rotating around the axis of the piston needs to be limited, and the piston limiting structure provided by the invention can be used for the rotary cylinder piston compressor in the prior art, so that the piston is limited. One embodiment of the piston stop arrangement of the present invention is shown in fig. 1-5.
The piston limiting structure provided by the invention comprises a cylinder 1, a piston 2 and a limiting piece 3. As shown in fig. 1 to 5, in the present embodiment, the cylinder 1 is a cylindrical body, and an assembly hole 12 penetrating the cylinder 1 is provided in an axial middle portion of the cylinder 1, the assembly hole 12 being provided on an end surface of the cylinder 1 concentrically with the end surface of the cylinder 1 for passing the rotary shaft 6. The outer circumferential surface of the cylinder 1 is provided with a piston hole 11 which is perpendicular to the direction of the assembly hole 12 and penetrates through the cylinder 1, and the projection of the piston hole 11 along the axial direction is circular.
As shown in fig. 2, the piston 2 is provided in the piston hole 11 in a form-fitting manner and is reciprocally slidable in the piston hole 11. The piston 2 is matched with the piston hole 11, the piston 2 is of a cylinder-like structure, the end faces of the two ends of the piston 2 are of a curved surface structure which is matched with the piston hole 11 to form a finished cylindrical surface, and the axial length of the piston 2 is smaller than the radial size of the cylinder 1, so that the piston 2 slides back and forth in the cylinder 1. The middle part of the piston 2 is provided with a shaft hole 22 along the axial direction of the cylinder 1, when the piston 2 is arranged in the piston hole 11, the rotating shaft 6 penetrates out of the assembly hole 12 of the cylinder 1 and the shaft hole 22 on the piston 2, and the shaft hole 22 is arranged at the 1/2 position of the axial length of the piston 2. The side wall of the piston 2 is provided with a limit groove 13, the limit groove 13 is used for assembling the limit piece 3, in the embodiment, the limit piece 3 and the limit groove 13 are arranged to be similar to a matching structure of a key and a key groove, the limit groove 13 is a waist-shaped groove, the lower end of the limit piece 3 is fixedly assembled in the limit groove 13, and the upper end of the limit piece 3 protrudes out of the side wall of the piston 2. The limit groove 13 is axially arranged along the piston 2 and is positioned at a position 1/2 of the radial length of the piston 2, and the width from the end surface of the piston 2 to the shaft hole 22 is the largest at the position, so that the limit groove 13 is convenient to process.
As shown in fig. 3, a sliding groove 21 is formed in the position, corresponding to the limit groove 13, of the piston hole 11 of the cylinder 1, wherein one end of the sliding groove 21, which is positioned in the assembly hole 12, penetrates into the assembly hole 12, and the other end does not penetrate through the outer side wall of the cylinder 1. As shown in fig. 4, when the piston 2, the cylinder 1, and the stopper 3 are assembled, the piston 2 is assembled into the piston hole 11, one end of the stopper 3 is fixed in the stopper groove 13, the other end is positioned in the slide groove 21, and the radial dimension of the stopper 3 is matched with the radial dimension of the slide groove 21, so that the piston 2 is restricted from rotating.
In the present embodiment, the piston 2 reciprocates relative to the cylinder 1 in the operating state, and therefore the stopper 3 reciprocates in the slide groove 21 with the piston 2, and the position of the stopper groove 13 on the piston satisfies:
L＜R1-R2-S
Wherein L is the shortest distance between one end of the limiting groove along the axial direction of the piston and the end surface of the piston, R 1 is the radius of the end surface of the cylinder, R 2 is the radius of the section of the assembly hole, and S is the sliding stroke of the piston in the cylinder.
When l=r 1-R2 -S, the end of the limiting member 3, which is far away from the end of the shaft hole 22, is located at the limit position of the slide groove 21 when the piston 2 slides to the stroke limit position, i.e., the limiting member 3 is completely located in the assembly hole 12, i.e., is about to be separated from the slide groove 21. Therefore, in order to ensure that the limiting piece 3 does not separate from the sliding groove 21 in the sliding process of the sliding groove 21, L < R 1-R2 -S is set, and when the formula is satisfied, the limiting piece 3 does not separate from the sliding groove 21 to enter the assembly hole 12 of the air cylinder 1.
Meanwhile, in the present embodiment, the position of the chute 21 satisfies:
L′≤L
wherein L' is the shortest distance from the end of the chute 21 remote from the fitting hole 12 to the outer sidewall of the cylinder 1. When L' =l, when the stopper 3 slides in the chute 21 to the stroke end position, the end of the stopper 3 and the side wall of the end of the chute 21 are at the extreme positions just not contacted, and at this time, the stopper 3 and the stopper chute 21 do not collide. When L' < L, when the limiting piece 3 slides back and forth in the chute 21, the end part of the limiting piece 3 and the side wall of the end part of the chute 21 are not contacted all the time, so that the limiting piece 3 and the chute 21 are not collided, and the compressor works more stably and reliably.
On the basis, the longer the length of the limiting piece 3 along the axial direction of the piston 2 is, the longer the corresponding length of the sliding groove 21 is designed, so that the length of the sliding groove 21 can be reduced by reducing the length of the limiting piece 3 along the axial direction of the piston 2, the length of the sliding groove 21 is reduced, the sealing distance between the piston 2 and the inner wall of the cylinder 1 is correspondingly increased, and the sealing effect between the piston 2 and the inner wall of the cylinder 1 is better. Meanwhile, on the premise of meeting the minimum sealing distance requirement, the diameters of the piston 2 and the cylinder 1 can be correspondingly designed and reduced, and the mechanical power consumption of the compressor is reduced.
The structure of the piston stopper structure in the present embodiment is described above, and the operation principle of the stopper 3 and the stopper chute 21 in the present embodiment will be described below.
As shown in fig. 5, in (a), one end of the axial hole 22 of the stopper 3 coincides with one end of the slide groove 21 away from the fitting hole 12, and when the piston 2 and the cylinder 1 are rotated to the position in (b), the stopper 3 slides to the intermediate position of the slide groove 21, at which time a part of the stopper 3 is located in the fitting hole 12 and the other part is located in the slide groove 21. When the piston 2 and the cylinder 1 are rotated to the position in (c), the stopper 3 slides to an end of the slide groove 21 near the fitting hole 12. The side wall of the limiting piece 3 is always abutted with the side wall of the limiting chute 21 in the sliding process of the limiting piece 3 in the chute 21, so that the limiting of the piston 2 is realized, and the piston 2 is prevented from rotating around the axial direction of the piston.
The structure and principle of the piston limit structure in the present embodiment are described above, and it should be noted that other alternative embodiments are also possible in the present invention in addition to the above embodiments.
Fig. 6 and 7 show a second embodiment of the piston limiting structure according to the present invention, in this embodiment, the number of limiting grooves 13 is two, two sliding grooves 21 are correspondingly provided on the inner wall of the cylinder 1, the two limiting grooves 13 are respectively located on the front side and the rear side of the shaft hole 22, and the two limiting members 3 limit the piston 2, so that the limiting effect is better.
Fig. 8 and 9 show a third embodiment of the piston stop arrangement according to the invention, in which the stop 3 is provided as a cylindrical stop pin, while the stop groove 13 is provided as a cylindrical pin bore. According to the embodiment, the length of the limiting piece 3 in the axial direction of the piston 2 is reduced, so that the sealing distance between the piston 2 and the inner wall of the cylinder 1 is correspondingly increased, and the sealing effect between the piston 2 and the inner wall of the cylinder 1 is better. Meanwhile, under the condition that the reciprocating stroke of the piston 2 is met, the two ends of the sliding groove 21 do not penetrate through the inner wall of the cylinder 1, and at the moment, the axial length of the sliding groove 21 along the piston hole 11 is at least equal to the sum of the diameter of the limiting pin and the stroke of the piston 2. Meanwhile, on the premise of meeting the minimum sealing distance requirement, the diameters of the piston 2 and the cylinder 1 can be correspondingly designed and reduced, and the mechanical power consumption of the compressor is reduced. As shown in fig. 9, in the present embodiment, the stopper pin is provided on one side of the lower end of the shaft hole 22 of the piston 2.
Fig. 10 shows a fourth embodiment of the piston limit structure of the present invention, in which a limit pin is provided on one side of the upper end of the shaft hole 22 of the piston 2.
Fig. 11 shows a fifth embodiment of the piston limit structure of the present invention, in which limit pins are provided on each side of the upper and lower ends of the shaft hole 22 of the piston 2.
Fig. 12 shows a sixth embodiment of the piston limit structure of the present invention, in which limit pins are provided on both sides of the lower end of the shaft hole 22 of the piston 2.
Fig. 13 shows a seventh embodiment of the piston limit structure of the present invention, in which limit pins are provided on both sides of the upper end of the shaft hole 22 of the piston 2.
In a second aspect, the present invention further provides a compressor, as shown in fig. 1, where the compressor includes a rotating shaft 6, an upper flange 4, a lower flange 5, a cylinder liner 7, and the above-mentioned piston limiting structure, the cylinder 1 is disposed in the cylinder liner 7, and the rotating shaft 6 sequentially passes through the upper flange 4, the cylinder liner 7, and the lower flange 5. The compressor of the invention is based on the principle of the cross slide block, as shown in fig. 2, when the compressor works, the rotating shaft 6 is abutted with the wall surface of the shaft hole 22 of the piston 2 so as to drive the piston 2 and the cylinder liner 7 to rotate, and the piston 2 makes reciprocating motion relative to the cylinder 1 due to eccentric rotation of the rotating shaft 6 and the cylinder 1, so that gas is compressed in the volume cavities at two ends of the piston 2. According to the invention, the limiting piece 3 is arranged to be matched with the sliding groove 21 of the air cylinder 1 for limiting, so that the piston of the compressor is effectively prevented from autorotation to generate cylinder collision.
In a third aspect, the invention also provides a heat exchange device comprising the compressor or the piston limiting structure. The heat exchange equipment is an air conditioner or a refrigerator.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While obvious variations or modifications are contemplated as falling within the scope of the present application.
Claims (11)
1. A kind of compressor, in which the compressor is composed of a casing, characterized by comprising the following steps:
a rotating shaft (6);
The piston limiting structure comprises a cylinder (1) and a piston (2), wherein the cylinder (1) is provided with a piston hole (11) which is perpendicular to the axial direction of the cylinder (1) and penetrates through the cylinder (1), the projection of the piston hole (11) along the penetrating direction is circular, the inner wall of the piston hole (11) is provided with a sliding groove (21) which is axially arranged along the piston hole (11), and two ends of the sliding groove (21) do not penetrate through the outer side wall of the cylinder (1) along the axial length of the piston hole (11); the piston (2) is arranged in the piston hole (11) in a shape fit manner and can slide back and forth in the piston hole (11), a limiting piece (3) is arranged on the side wall of the piston (2), and when the piston (2) is assembled with the cylinder (1), the limiting piece (3) can slide in the sliding groove (21) and is in abutting fit with the side wall of the sliding groove (21) so as to limit the piston (2) to rotate around the axial direction of the piston; an assembling hole (12) penetrating to the piston hole (11) is formed in the end face of the air cylinder (1), and one end, far away from the outer peripheral face of the air cylinder (1), of the sliding groove (21) penetrates to the assembling hole (12); a limiting groove (13) is formed in the side wall of the position, corresponding to the sliding groove (21), of the piston (2), the limiting piece (3) is assembled with the limiting groove (13) in a shape-fit mode, and when the piston (2) is assembled with the air cylinder (1), one end of the limiting piece (3) is located in the limiting groove (13), and the other end of the limiting piece is located in the sliding groove (21); the rotating shaft (6) sequentially penetrates out of the air cylinder (1) and the piston (2), and the rotating shaft (6) drives the piston (2) and the air cylinder (1) to rotate; and
And the cylinder sleeve (7), wherein the cylinder (1) is arranged in the cylinder sleeve (7) and rotates in the cylinder sleeve (7).
2. The compressor of claim 1, wherein,
The assembly hole (12) penetrates through the air cylinder (1) for the rotating shaft (6) to pass through, and the section of the assembly hole is circular and concentric with the end face of the air cylinder (1).
3. A compressor according to claim 2, wherein,
The position of the sliding groove (21) in the cylinder (1) corresponds to 1/2 of the radial length of the piston hole (11).
4. A compressor according to claim 3, wherein,
When the piston (2) is assembled with the cylinder (1), the following conditions are satisfied:
wherein, Is the shortest distance between one end of the limit groove (13) along the axial direction of the piston (2) and the end face of the piston (2),Is the radius of the end face of the cylinder (1),Is the radius of the cross section of the assembly hole (12),Is the stroke of the piston (2) sliding in the cylinder (1).
5. The compressor of claim 4, wherein,
When the piston (2) is assembled with the cylinder (1), the following conditions are satisfied:
wherein, Is the shortest distance between one end of the chute (21) far away from the assembly hole (12) and the outer side wall of the cylinder (1).
6. The compressor of claim 5, wherein,
The piston (2) is provided with a shaft hole (22) penetrating along the axial direction of the cylinder (1), and the shaft hole (22) is positioned at the 1/2 position of the axial length of the piston (2).
7. The compressor of claim 6, wherein,
The sliding groove (21) is arranged on at least one of the front side and the rear side of the shaft hole (22) along the axial direction of the piston.
8. The compressor of claim 1, wherein,
The limiting piece (3) is a limiting plate.
9. The compressor of claim 1, wherein,
The limiting piece (3) is a cylindrical limiting pin.
10. A heat exchange apparatus comprising a compressor as claimed in any one of claims 1 to 9.
11. The heat exchange device of claim 10, wherein the heat exchange device is an air conditioner.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811555294.9A CN109555694B (en) | 2018-12-18 | 2018-12-18 | Piston limit structure, compressor and heat exchange equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811555294.9A CN109555694B (en) | 2018-12-18 | 2018-12-18 | Piston limit structure, compressor and heat exchange equipment |
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| CN109555694A CN109555694A (en) | 2019-04-02 |
| CN109555694B true CN109555694B (en) | 2024-09-24 |
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| CN109555690B (en) * | 2018-12-18 | 2024-07-23 | 珠海格力电器股份有限公司 | Piston limit structure, compressor and heat exchange equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2303969A (en) * | 1940-08-03 | 1942-12-01 | Falk Corp | Pump |
| CN106065854A (en) * | 2016-07-28 | 2016-11-02 | 珠海格力节能环保制冷技术研究中心有限公司 | One turns cylinder piston compressor |
| CN209414158U (en) * | 2018-12-18 | 2019-09-20 | 珠海格力电器股份有限公司 | Piston limit structure, compressor and indirect heating equipment |
-
2018
- 2018-12-18 CN CN201811555294.9A patent/CN109555694B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2303969A (en) * | 1940-08-03 | 1942-12-01 | Falk Corp | Pump |
| CN106065854A (en) * | 2016-07-28 | 2016-11-02 | 珠海格力节能环保制冷技术研究中心有限公司 | One turns cylinder piston compressor |
| CN209414158U (en) * | 2018-12-18 | 2019-09-20 | 珠海格力电器股份有限公司 | Piston limit structure, compressor and indirect heating equipment |
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| CN109555694A (en) | 2019-04-02 |
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