CN109555695B - Piston limit structure, compressor and heat exchange equipment - Google Patents
Piston limit structure, compressor and heat exchange equipment Download PDFInfo
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- CN109555695B CN109555695B CN201811555295.3A CN201811555295A CN109555695B CN 109555695 B CN109555695 B CN 109555695B CN 201811555295 A CN201811555295 A CN 201811555295A CN 109555695 B CN109555695 B CN 109555695B
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- 230000000670 limiting effect Effects 0.000 claims abstract description 176
- 230000000149 penetrating effect Effects 0.000 claims description 13
- 230000004323 axial length Effects 0.000 claims description 9
- 230000000452 restraining effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000003754 machining Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000011031 large-scale manufacturing process Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 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
- 238000000465 moulding Methods 0.000 description 1
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 axis direction of the cylinder, and the piston hole is round; 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 chute is formed in the side wall of the piston, and the limiting chute does not penetrate through two ends of the side wall of the piston in the length along the axial direction of the piston; and the limiting piece is provided with a limiting hole, the limiting piece is installed in the limiting hole in a shape fit manner, and one end of the limiting piece can slide in the limiting chute and is in butt fit with the side wall of the limiting chute so as to limit the piston to rotate around the axis 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:
A cylinder having a piston hole perpendicular to the cylinder axis direction and penetrating the cylinder, a projection of the piston hole in the penetrating direction being circular;
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 chute is formed in the side wall of the piston along the axial direction, and the limiting chute does not penetrate through two ends of the side wall of the piston along the axial length of the piston; and
The limiting piece is provided with a limiting hole penetrating through the outer wall of the cylinder to the piston hole, the limiting piece is installed in the limiting hole in a shape fit mode, and one end of the limiting piece can slide in the limiting sliding groove and is in butt fit with the side wall of the limiting sliding groove to limit the piston to rotate around the axis direction of the piston.
The position of the limiting hole on the end face of the cylinder meets the following conditions:
Wherein R is the distance between the center of the limiting hole and the center of the end face of the cylinder, R 1 is the radius of the end face of the cylinder, S is the sliding stroke of the piston in the cylinder, and D' is the diameter of the section of the limiting hole (13).
The limiting hole penetrates through the piston hole from the end face of the cylinder and is parallel to the axial direction of the cylinder.
When one end of the limiting piece is in sliding fit with the limiting sliding groove, the following conditions are satisfied:
L≥S+D
l is the length of the limiting chute along the axial direction of the piston, S is the sliding stroke of the piston in the cylinder, and D is the length of the limiting piece along the axial direction of the piston.
The position of the limiting hole on the end face of the cylinder corresponds to 1/2 of the radial length of the piston.
The cylinder is provided with a circular assembly hole which is concentric with the end face of the cylinder and axially penetrates through the cylinder, and the assembly hole is used for the rotating shaft to pass through.
The position of the limiting hole on the end face of the cylinder meets the following conditions:
Wherein R 2 is the radius of the cross section of the assembly hole.
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 limiting 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 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. Limiting sliding grooves are formed in the side wall of the piston along the axial direction, the limiting sliding grooves penetrate through the two ends of the side wall of the piston at the upper part of the axial length of the piston, a clearance groove does not exist between the piston and the inner wall of the cylinder, the limiting surface is not communicated with the volume cavity, and clearance volume cannot be introduced, so that the rotary cylinder compressor works more stably. The cylinder is provided with a limiting hole which penetrates through the outer wall of the cylinder to the piston hole, the limiting piece is installed in the limiting hole in a shape fit mode, and one end of the limiting piece can slide in the limiting chute and is in butt fit with the side wall of the limiting chute to limit the piston to rotate around the axis direction of the piston. The limiting piece arranged on the air cylinder is matched with the limiting surface on the piston, so that the assembly of a workpiece is facilitated, the machining and production are easy, meanwhile, the gear matching size between the piston and the air cylinder is reduced, the fit clearance between the piston and the air cylinder is effectively controlled, the friction power consumption between the piston and the air cylinder is reduced, and the performance of the compressor is improved.
2) According to the piston spool structure provided by the invention, the limiting hole penetrates to the piston hole along the end surface of the cylinder and is parallel to the axial direction of the cylinder, the limiting hole and the limiting piece of the cylinder are arranged in the vertical direction, and the limiting piece cannot interfere with the rotation of the cylinder, so that the rotation of the cylinder is more stable and reliable.
3) According to the piston limiting structure provided by the invention, when one end of the limiting piece is in sliding fit with the limiting sliding groove, the following conditions are met: l is greater than or equal to S+D, wherein L is the length of the limiting chute along the axial direction of the piston, S is the sliding stroke of the piston in the cylinder, and D is the length of the limiting piece along the axial direction of the piston. The length of the limiting chute is greater than the sum of the stroke length of the limiting piece and the stroke length of the piston, so that the piston is ensured not to strike the limiting piece during reciprocating sliding, and stability and reliability are ensured.
4) According to the piston limiting structure provided by the invention, the position of the limiting hole on the end surface of the cylinder corresponds to 1/2 of the radial length of the piston, and the wall thickness from the end surface of the cylinder to the piston hole is minimum at the position, so that the processing of the limiting hole and the limiting chute is facilitated.
5) The piston limiting structure provided by the invention has the advantages that the positions of limiting holes on the end face of the cylinder are as follows: Wherein R is the distance between the center of the limiting hole and the center of the cylinder end face, R 1 is the radius of the cylinder end face, S is the sliding stroke of the piston in the cylinder, and D' is the length of the limiting hole in the direction along the connecting line of the center of the limiting hole and the center of the cylinder end face. Therefore, when the piston slides back and forth in the piston hole, the limiting piece does not slide out of the piston end face when sliding to one end of the limiting sliding groove close to the piston end face, and accordingly clearance volume cannot be introduced into the piston end face, and the rotary cylinder compressor works more stably.
6) According to the piston limiting structure provided by the invention, the cylinder is provided with the circular assembly hole which is concentric with the end face of the cylinder and penetrates through the cylinder along the axial direction, the assembly hole is used for the rotating shaft to penetrate through, and the position of the limiting hole on the end face of the cylinder meets the following conditions: Wherein R 2 is the radius of the cross section of the assembly hole. Thereby guarantee that the locating part is located completely in the cylinder, the locating part is more stable with spacing spout cooperation.
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, the limiting sliding grooves are 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 number of the limiting structures is two, and the limiting effect is better. The limiting part is a cylindrical limiting pin, so that the limiting hole and the limiting part are convenient to process.
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 cross-sectional view of a compressor mounting structure in accordance with one embodiment of the present invention;
FIG. 5 is an enlarged schematic view of the structure of FIG. 4;
FIG. 6 is a schematic diagram of the operation of one embodiment provided by the present invention;
FIG. 7 is a schematic view of a stopper, piston and cylinder in a second embodiment of the present invention;
FIG. 8 is a sectional view showing an assembled structure of a compressor in accordance with a second embodiment of the present invention;
Fig. 9 is a schematic view of a stopper, a piston and a cylinder according to a third embodiment of the present invention.
Reference numerals illustrate:
1-a cylinder; 11-piston bore; 12-fitting holes; 13-limiting holes; 2-a piston; 21-a limiting 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. 1-6.
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 6, 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 limiting chute 21 along the axial direction of the piston 2, and the limiting chute 21 does not penetrate through two ends of the side wall of the piston 2 on the axial length of the piston 2. In the present embodiment, the limit chute 21 is provided as a waist-shaped chute, and the limit chute 21 is provided at one side of the shaft hole 22.
The cylinder 1 is provided with a limiting hole 13 penetrating from the outer wall of the cylinder 1 to the piston hole 11, the limiting piece 3 is installed in the limiting hole 13 in a shape fit manner, one end of the limiting piece 3 slides in the limiting sliding groove 21 and is in butt fit with the side wall of the limiting sliding groove 21, and therefore the piston 2 is limited. As shown in fig. 3, in the present embodiment, the limiting hole 13 penetrates from the end surface of the cylinder 1 to the piston hole 11 and is parallel to the axial direction of the cylinder 1, and the limiting hole 13 is disposed in the vertical direction of the cylinder 1, so that the limiting piece 3 is abutted to the limiting chute 21 in the vertical direction, the limiting hole 13 is convenient to be formed in a machining mode, the abutting direction is perpendicular to the rotation directions of the cylinder 1 and the piston 2, the limiting piece 3 is not subjected to rotation moment in the horizontal direction, and the limiting structure is more stable and reliable. Meanwhile, in the embodiment, in order to facilitate the processing molding and the precision guarantee of the limiting piece 3, the limiting hole 13 is a circular hole, the corresponding limiting piece 3 is a cylindrical pin structure, the circular pin is matched with the limiting hole 13, and preferably, the matching clearance of the circular pin and the limiting hole 13 is 0-0.05mm. The position of the limiting hole 13 at the end face of the cylinder 1 corresponds to 1/2 of the radial length of the piston 2, and the limiting piece 3 and the limiting sliding groove 21 are matched in the radial center of the piston hole 11, so that the processing of the limiting hole 13 and the limiting sliding groove 21 is facilitated because the wall thickness from the end face of the cylinder 1 to the piston hole 11 at the position is thinnest.
As shown in fig. 4 and 5, when the piston 2, the cylinder 1, and the stopper 3 are assembled, the piston 2 is assembled into the piston hole 11, the stopper chute 21 is aligned with the stopper hole 13, the stopper 3 is inserted into the stopper hole 13, one end of the stopper 3 is positioned in the stopper chute 21, and the radial dimension of the stopper 3 is matched with the radial dimension of the stopper chute 21, so that the piston 2 is restricted from rotating.
In this embodiment, the piston 2 reciprocates relative to the cylinder 1 in the working state, so that in order to ensure that the limit chute 21 and the limit piece 3 do not collide during the reciprocation, the limit chute 21 satisfies:
L≥S+D
where L is the length of the limit chute 21 along the axial direction of the piston 2, S is the stroke of the piston 2 sliding in the cylinder 1, D is the length of the limit element 3 along the axial direction of the piston 2, and in this embodiment, D is the diameter of the cross section of the limit element 3.
When l=s+d, the side wall of the limiting member 3 and the side wall of the end of the limiting chute 21 are at the limit position just not contacted when the limiting member 3 slides to the stroke end position in the limiting chute 21, and at this time, the limiting member 3 and the limiting chute 21 do not collide. When L > S+D, when the limiting piece 3 slides reciprocally in the limiting chute 21, the side wall of the limiting piece 3 and the side wall of the end part of the limiting chute 21 are not contacted all the time, so that the limiting piece 3 and the limiting chute 21 cannot collide, 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 limiting chute 21 is designed, so that the length of the limiting chute 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 limiting chute 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.
In the present embodiment, the position of the limiting hole 13 at the end face of the cylinder 1 should satisfy:
Wherein R is the distance between the center of the limiting hole 13 and the center of the end face of the cylinder 1, R 1 is the radius of the end face of the cylinder 1, S is the sliding stroke of the piston 2 in the cylinder 1, D ' is the length of the limiting hole 13 in the direction along the connecting line between the center of the limiting hole 13 and the center of the end face of the cylinder 1, in this embodiment, D ' is the diameter of the cross section of the limiting hole 13, and D ' =d.
When (when)When the limiting hole 13 is positioned at the limit position near one side of the assembly hole 12, the circle of the cross section of the limiting hole 13 is circumscribed with the assembly hole 12, the limiting hole 13 is positioned at the limit position near the assembly hole 12, and in order to ensure that the limiting hole 13 is completely positioned on the end face of the cylinder 1, the cooperation of the limiting piece 3 and the limiting hole 13 is ensured to be more stable,/>
When (when)At the same time, one end of the limit chute 21 corresponding to the limit hole 13 penetrates the end face of the piston 2, so that a clearance volume is introduced into the volume chambers at the two ends of the piston 2, thereby/>
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. 6, in (a), the stopper 3 is located at an end of the stopper slide groove 21 away from the shaft hole 22, 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 stopper slide groove 21, and when the piston 2 and the cylinder 1 are rotated to the position in (c), the stopper 3 slides to an end of the stopper slide groove 21 close to the shaft hole 22. 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 limiting 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. 7 and 8 show a second embodiment of the piston limit structure according to the present invention, in this embodiment, the number of limit sliding grooves 21 is two, two limit holes 13 are correspondingly provided on the end surface of the cylinder 1, the two limit sliding grooves 21 are respectively located on the front side and the rear side of the shaft hole 22, and the two limit pieces 3 limit the piston 2, so that the limit effect is better.
Fig. 9 shows a third embodiment of the piston limit structure according to the present invention, in which the difference from the above embodiment is that the setting position of the limit chute 21 is deviated from the 1/2 position of the radial length of the piston 2, and the corresponding limit hole 13 on the cylinder 1 is also deviated from the 1/2 position of the radial length of the piston hole 11.
In the fourth embodiment, the limiting holes 13 may be disposed on the upper end surface and/or the lower end surface of the cylinder 1, and the corresponding limiting sliding grooves 21 are disposed at the corresponding positions 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 limiting chute 21 of the piston 2 for limiting, so that the piston of the compressor is effectively prevented from rotating 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 (12)
1. A piston limit structure, characterized by comprising:
A cylinder (1) having a piston hole (11) perpendicular to an axial direction of the cylinder (1) and penetrating the cylinder (1), a projection of the piston hole (11) in the penetrating direction being circular;
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 limit chute (21) is formed in the side wall of the piston (2) along the axial direction, and the limit chute (21) does not penetrate through two ends of the side wall of the piston (2) along the axial length of the piston (2); and
The limiting piece (3), a limiting hole (13) penetrating from the outer wall of the air cylinder (1) to the piston hole (11) is formed in the air cylinder (1), the limiting piece (3) is installed in the limiting hole (13) in a shape-fit manner, one end of the limiting piece (3) can slide in the limiting sliding groove (21) and is in abutting fit with the side wall of the limiting sliding groove (21) so as to limit the piston (2) to rotate around the axis direction of the piston,
The positions of the limiting holes (13) on the end face of the air cylinder (1) meet the following conditions:
Wherein R is the distance between the center of the limiting hole (13) and the center of the end face of the cylinder (1), R 1 is the radius of the end face of the cylinder (1), S is the sliding stroke of the piston (2) in the cylinder (1), and D' is the cross-section diameter of the limiting hole (13).
2. The piston spacing structure of claim 1, wherein,
The limiting hole (13) penetrates from the end face of the cylinder (1) to the piston hole (11) and is parallel to the axis direction of the cylinder (1).
3. The piston stop structure of claim 2, wherein the piston stop structure comprises a piston stop member,
When one end of the limiting piece (3) is in sliding fit with the limiting sliding groove (21), the following conditions are met:
L≥S+D
Wherein L is the length of the limit chute (21) along the axial direction of the piston (2), S is the sliding stroke of the piston (2) in the cylinder (1), and D is the length of the limit piece (3) along the axial direction of the piston (2).
4. A piston stop structure according to claim 3, wherein,
The position of the limiting hole (13) on the end face of the cylinder (1) corresponds to 1/2 of the radial length of the piston (2).
5. The piston stop structure of claim 4, wherein the piston stop structure comprises a piston stop member,
The cylinder (1) is provided with a circular assembly hole (12) which is concentric with the end face of the cylinder (1) and axially penetrates through the cylinder (1), and the assembly hole (12) is used for the rotating shaft (6) to penetrate through.
6. The piston stop structure of claim 5, wherein the piston stop structure comprises a piston stop member,
The positions of the limiting holes (13) on the end face of the air cylinder (1) meet the following conditions:
wherein R 2 is the radius of the cross section of the assembly hole (12).
7. The piston stop structure of any one of claims 4 to 6, 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).
8. The piston stop structure of claim 7, wherein the piston stop structure comprises a piston stop member,
The limiting sliding groove (21) is arranged on at least one of the front side and the rear side of the shaft hole (22) along the axis direction of the piston.
9. The piston stop structure according to any one of claims 1 to 6, 8, wherein,
The limiting piece (3) is a cylindrical limiting pin.
10. A compressor, comprising:
A rotating shaft (6);
The piston limit structure according to any one of claims 1 to 9, wherein the rotating shaft (6) sequentially penetrates out of the cylinder (1) and the piston (2), and the rotating shaft (6) drives the piston (2) and the 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).
11. A heat exchange device comprising a piston restraining structure according to any one of claims 1 to 9.
12. The heat exchange device of claim 11, wherein the heat exchange device is an air conditioner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811555295.3A CN109555695B (en) | 2018-12-18 | Piston limit structure, compressor and heat exchange equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811555295.3A CN109555695B (en) | 2018-12-18 | Piston limit structure, compressor and heat exchange equipment |
Publications (2)
| Publication Number | Publication Date |
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| CN109555695A CN109555695A (en) | 2019-04-02 |
| CN109555695B true CN109555695B (en) | 2024-06-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2303969A (en) * | 1940-08-03 | 1942-12-01 | Falk Corp | Pump |
| US3541892A (en) * | 1968-02-02 | 1970-11-24 | Jawa Np | Control means for the control of the piston stroke of a piston pump |
| CN204877942U (en) * | 2015-08-07 | 2015-12-16 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor and indirect heating equipment |
| 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 |
| CN209604251U (en) * | 2018-12-18 | 2019-11-08 | 珠海格力电器股份有限公司 | Piston limit structure, compressor and heat exchange equipment |
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2303969A (en) * | 1940-08-03 | 1942-12-01 | Falk Corp | Pump |
| US3541892A (en) * | 1968-02-02 | 1970-11-24 | Jawa Np | Control means for the control of the piston stroke of a piston pump |
| CN204877942U (en) * | 2015-08-07 | 2015-12-16 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor and indirect heating equipment |
| 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 |
| CN209604251U (en) * | 2018-12-18 | 2019-11-08 | 珠海格力电器股份有限公司 | Piston limit structure, compressor and heat exchange equipment |
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