WO2023036278A1

WO2023036278A1 - Compressor

Info

Publication number: WO2023036278A1
Application number: PCT/CN2022/117976
Authority: WO
Inventors: 廖平阳
Original assignee: 廖平阳
Priority date: 2021-09-13
Filing date: 2022-09-09
Publication date: 2023-03-16
Also published as: CN113915095A; CN113915095B

Abstract

A compressor, comprising a stator and a rotor, wherein the rotor comprises a rotation shaft (1) and at least one air cylinder (2); the air cylinder (2) is fixedly connected to the rotation shaft (1); the center line of the air cylinder (2) perpendicularly intersects with the center line of the rotation shaft (1); a piston (3) is arranged at each of two ends of the air cylinder (2); the stator comprises a housing (4); the inner wall of the housing (4) facing the air cylinder (2) is provided with a groove (5), which is an elliptical groove; the center of the elliptical groove coincides with the center line of the rotation shaft (1); two guide slots (6) are provided, corresponding to each piston (3), in a side wall of the air cylinder (2); the extension direction of the guide slots (6) is parallel to the center line of the air cylinder (2); each piston (3) comprises two protrusions (7), which respectively pass through the two guide slots (6) and extend into the groove (5) in the housing; one end of the rotation shaft (1) protrudes out of the housing (4) to receive input of power; the rotation shaft (1) is internally provided with an air hole (8) in communication with an inner chamber of the air cylinder (2); and the air hole (8) is used for air intake and/or air discharge.

Description

a compressor

technical field

The invention relates to a compressor, which belongs to the related technical fields of air compressors, air-conditioning refrigeration compressors, fluid pumps and the like.

Background technique

The existing compressor mainly adopts a connecting rod crankshaft mechanism, which has large vibration, high noise, heavy structure, serious lateral wear of the piston and cylinder, and high production cost.

Contents of the invention

In order to overcome the disadvantages of existing compressors, the present invention provides a new type of compressor, which utilizes the groove on the shell and the guide groove on the cylinder to act on the piston, so that the piston generates reciprocating compression while rotating, eliminating the need for continuous compression. Rod crankshaft mechanism, but still adopt the traditional technology of cylinder piston, which is beneficial to reduce production cost, improve service life, reduce vibration and reduce volume. The specific technical scheme is as follows.

A compressor, comprising a stator and a rotor, characterized in that:

The rotor includes a rotating shaft and at least one cylinder, the cylinder is fixedly connected to the rotating shaft, and the centerline of the cylinder is perpendicular to the centerline of the rotating shaft and the intersection point falls on the midpoint of the cylinder centerline; Pistons are arranged at both ends of the cylinder, and the two pistons are distributed on both sides of the rotating shaft;

The stator includes a housing, the housing has a space for accommodating the cylinder, grooves are provided on both sides of the housing perpendicular to the rotating shaft, and the grooves are elliptical grooves, and The center of the elliptical groove coincides with the center line of the rotating shaft;

Two guide grooves are provided on the side wall of the cylinder corresponding to each of the pistons, the extension direction of the guide grooves is parallel to the centerline of the cylinder, and the centerline of the two guide grooves is aligned with the axis The center line and the center line of the cylinder are all located on the same plane, the piston includes two protrusions, and the two protrusions respectively pass through two guide grooves and extend into the groove of the housing;

One end of the rotating shaft protrudes out of the housing for receiving power input, and an air hole communicating with the inner cavity of the cylinder is provided in the rotating shaft, and the air hole is used for intake air and/or exhaust air.

With the above scheme, when the external motor drives the rotating shaft to rotate relative to the housing, the cylinder rotates relative to the housing, and the protruding part of the piston in the cylinder moves in the groove of the elliptical track. When the rotating shaft rotates once, the elliptical The groove of the shape track makes the two pistons move relative to each other twice, which produces two suction movements and two compression movements. During compression, the fluid working medium is compressed, and the compressed fluid working medium is discharged through the air hole after compression, thereby realizing the function of the compressor.

Further, the protruding part includes an inner square slider and an outer cylinder, the square slider is located in the guide groove, and the cylinder is located in the groove. The square slider slides in the guide groove, and the two form a low-level structure, which is conducive to the stable and reliable operation of the piston in the cylinder.

Further, a slider is sleeved on the cylinder, and the slider is located in the groove. The slider can rotate relative to the cylinder, and the slider and the cylinder form a low secondary structure. Preferably, the two outer surfaces of the slider facing the groove are arc surfaces; the arc surface of the slider and the groove with an elliptical track can form a low secondary structure.

Further, four cylinders are accommodated in the housing, and two adjacent cylinders are distributed at intervals of 90° with respect to the rotating shaft. The two cylinders are beneficial to realize a relatively continuous suction compression process, and the compression efficiency is higher.

Further, the housing has a sleeve sleeved on the rotating shaft, and the sleeve is provided with an air inlet and an exhaust port, and the air holes of the rotating shaft can be selectively connected with the air inlet or the air outlet. The exhaust port is connected. The traditional sealing ring structure is used to realize the sealing of the air hole on the rotating shaft and the sleeve on the housing.

Based on the same inventive concept, the shape of the groove in the housing of the present invention can also be designed as a circle deviated from the center of the rotating shaft. In order to allow the two pistons in the cylinder to move relative to each other, two intersecting eccentric circles should be designed Groove, and make the sliders corresponding to the two pistons not slide in the same circular groove. In order to prevent the slider from deviating from the track at the intersection, the length of the slider should be designed to be more than twice the length of the intersection. In order to prevent the slider from deviating from the track, the depth of a pair of eccentric circular grooves at the diagonal positions on both sides of the housing can also be designed to be deeper than the other pair of eccentric circular grooves, and the corresponding sliders are also synchronously deepened (thickened) ), and the two sliders on the same piston are cast together with the cylindrical piston pin, and the connecting rod big head structure similar to the traditional machine is adopted, and the two square sliders on the piston are designed as two semicircular pins Holes to form the piston pin hole seat. Although this solution will reduce the number of compressions within a certain speed by half compared with the previous solution, the shape of the slider can be designed to completely match the circular groove to form a more complete low-level structure.

The specific solution is: replace the above-mentioned grooves with two circular grooves intersecting each other, and the geometric centers of the two circular grooves deviate from the center line of the rotating shaft, and the connection between the geometric centers of the two circular grooves The midpoint of the line is located on the center line of the rotating shaft, and the protrusions corresponding to the two pistons of a cylinder extend into different circular grooves respectively;

The protrusion includes a square slider on the inside and a cylinder on the outside, the square slider is located in the guide groove; the cylinder is sleeved with a slider, and the slider is located in the groove middle.

Preferably, the slider is arc-shaped, and its length is more than twice the length of the intersection of two circular grooves.

Preferably, a pair of circular grooves at diagonal positions on both sides of the housing is deeper than the other pair of circular grooves.

Preferably, the above-mentioned cylinder is canceled, and the two sliders on the same piston are integrally cast with the cylindrical piston pin. Secondary connection.

Compared with the prior art, the present invention has the following beneficial effects.

1. Lower production cost. The present invention saves the crankshaft connecting rod mechanism, and reduces the cost.

2. Extended service life. No side pressure on the piston for longer life.

3. Stable operation. Symmetrical distribution of piston and cylinder, smoother operation and no polarization.

4. Large power-to-weight ratio. High volume compression in a small cavity.

5. Small size. The structure is compact, and the volume of the compressor is reduced.

6. Easy to process and produce. Still use the traditional cylinder, piston and sealing ring structure, and use the existing mature technology.

7. The existing lubrication method is still used, and the life of the sealing friction parts is longer.

8. More convenient maintenance. The reduction of parts, low secondary mechanism, reliable lubrication, and existing sealing and wearing parts all bring convenience to maintenance.

Description of drawings

Fig. 1 is a schematic diagram of grooves on the compressor housing of Embodiment 1 of the present invention;

Fig. 2 is the schematic diagram of the compressor of embodiment 1 of the present invention;

Fig. 3 is a three-dimensional schematic diagram of a cylinder of a compressor according to Embodiment 1 of the present invention;

Fig. 4 is a three-dimensional schematic diagram of a piston of a compressor according to Embodiment 1 of the present invention;

Fig. 5 is a piston sectional view of the compressor of Embodiment 1 of the present invention;

Fig. 6 is a schematic diagram of a slider of a compressor according to Embodiment 1 of the present invention;

Fig. 7 is a schematic cross-sectional view of a compressor according to Embodiment 1 of the present invention;

Fig. 8 is a schematic diagram of a four-cylinder compressor in Embodiment 1 of the present invention;

Fig. 9 is a schematic diagram of a rotary air valve according to Embodiment 1 of the present invention;

Fig. 10 is a schematic diagram of a compressor according to Embodiment 2 of the present invention;

Fig. 11 is a schematic cross-sectional view of a piston and a slider in Embodiment 2 of the present invention.

In the figure: shaft 1, cylinder 2, piston 3, housing 4, groove 5, first eccentric circular groove 5.1, second eccentric circular groove 5.2, guide groove 6, protrusion 7, square slider 7.1, cylinder Body 7.2, air hole 8, slider 9, piston pin 10.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Example 1

Referring to Figures 1-7, a compressor includes a stator and a rotor, the rotor includes a rotating shaft 1 and at least one cylinder 2, the cylinder 2 is fixedly connected to the rotating shaft 1, and the centerline of the cylinder 2 is perpendicular to the centerline of the rotating shaft 1, and The intersection point falls on the midpoint of the centerline of the cylinder; pistons 3 are arranged at both ends of the cylinder 2, and the two pistons 3 are distributed on both sides of the rotating shaft 1, and the two pistons 3 move toward the rotating shaft at the same time to realize the compression movement of the cylinder, and at the same time back to the The movement of the rotating shaft realizes the suction movement of the cylinder;

The stator includes a housing 4, which has a space for accommodating the cylinder 2, and the housing 4 is provided with grooves 5 on both sides perpendicular to the rotating shaft 1, the grooves 5 are elliptical grooves, and The center of the elliptical groove coincides with the axis of the rotating shaft 1;

Corresponding to each piston 3, two guide grooves 6 are provided on the side wall of the cylinder 2. The extension direction of the guide grooves 6 is parallel to the centerline of the cylinder 2. The centerline of the two guide grooves 6 and the centerline of the rotating shaft 1, the cylinder The centerlines of 2 are all located on the same plane, and the piston 3 includes two protrusions 7, and the two protrusions 7 respectively pass through the two guide grooves 6 and extend into the groove 5 of the housing 4, corresponding to the protrusions 7 , the inner wall of the housing 4 is provided with two grooves 5; in order to reduce weight, the piston 3 can adopt a hollow structure;

One end of the rotating shaft 1 protrudes from the casing 4 for receiving power input, and the rotating shaft 1 is provided with an air hole 8 communicating with the inner cavity of the cylinder 2, and the air hole 8 is used for air intake and/or exhaust.

Preferably, referring to Fig. 4-5, the protrusion 7 includes a square slider 7.1 on the inside and a cylinder 7.2 on the outside, the square slider 7.1 is located in the guide groove 6, and the cylinder 7.2 is located in the groove 5; see Fig. 2 , Fig. 6, a slider 9 is sleeved on the cylinder 7.2, and the slider 9 is located in the groove 5; the two outer surfaces of the slider 9 facing the groove 5 are arc surfaces. The slider 9 can rotate relative to the cylinder 7.2, and the slider 9 and the cylinder 7.2 form a low secondary structure; the two outer surfaces of the slider 9 facing the groove 5 are arc surfaces, so that the slider 9 and the groove 5 are both Those also form low substructures. Here, the inner side and the outer side are defined relative to the center of the piston or the cylinder, the ones close to the central axis of the cylinder belong to the inner side, and the ones farther away from the central axis of the cylinder barrel belong to the outer side.

As shown in FIG. 9 , the air hole 8 of the rotating shaft 1 can selectively communicate with the air inlet or the air outlet.

The working process is as follows:

Inhalation process. When the slider 9 on the protruding part 7 of the piston 3 is located at the short axis point of the elliptical groove, as the external force drives the rotation of the rotating shaft 1, while the cylinder 2 is rotating, the piston 3 will gradually move toward the long axis of the elliptical groove. Point movement, the two pistons 3 move away from the rotating shaft 1, the volume of the cavity of the cylinder 2 increases continuously, and the fluid working medium (not shown) enters the cavity of the cylinder 2 from the air hole 8 to realize the suction process; when the piston 3 When the slide block 9 on the top moves to the major axis point of the elliptical groove, the inner cavity volume of the cylinder reaches the maximum, and the suction is completed.

Compression process. When the slider 9 on the protruding part 7 of the piston 3 is located at the long axis point of the oval groove, as the external force drives the rotating shaft 1 to continue to rotate, while the cylinder 2 is rotating, the piston 3 will gradually move toward the short axis of the oval groove. The axis point moves, the two pistons 3 move towards the rotating shaft 1, the volume of the cavity of the cylinder 2 decreases continuously, and the fluid working medium (not shown) in the cylinder 2 is discharged from the air hole 8 and the exhaust valve plate to realize compression and exhaust process. When the slide block 9 on the piston 3 moves to the short axis point of the elliptical groove, the volume of the inner chamber of the cylinder reaches the minimum, and the exhaust is completed. Such a continuous cycle, every time the rotating shaft 1 rotates one revolution, the cylinder will perform two suction and two compression movements.

Compressors with higher power can also adopt a multi-cylinder structure. Figure 8 shows a four-cylinder offset situation. This design can make the rotor more compact. Multi-cylinder compressors must adopt a rotary valve structure.

Example 2

Embodiment 2 of the present invention is described below

Referring to accompanying drawings 10-11, Embodiment 2 has modified Embodiment 1. The difference from Embodiment 1 is that the shape of the groove 5 on the housing 4 is changed from an oval groove to two intersecting grooves. Circular grooves, the two circular grooves are respectively the first eccentric circular groove 5.1 and the second eccentric circular groove 5.2, and the geometric centers of the two circular grooves are both deviated from the center line of the rotating shaft 1, and the first The midpoint of the line connecting the geometric centers of the eccentric circular groove 5.1 and the second eccentric circular groove 5.2 is located on the centerline of the rotating shaft 1; the corresponding slide blocks 9 of the two pistons of the cylinder 2 are respectively located in the first eccentric circular groove 5.1 And in the second eccentric circle groove 5.2.

The length of the slider 9 is lengthened to more than twice the length of the intersection of the double eccentric circular grooves, so as to prevent the slider 9 from breaking away from the original circular groove at the intersection. In order to prevent the slider 9 from breaking away from the circular groove 5, a pair of eccentric circular grooves at the diagonal positions on both sides of the housing (the two side walls of the housing facing the cylinder have grooves, and the diagonal positions are The depth of a pair of eccentric circular grooves symmetrical about the center line of the rotating shaft) is designed to be deeper than the other pair of eccentric circular grooves, and the corresponding slide block 9 is also synchronously deepened (thickened), and the two sliding blocks on the same piston The block 9 and the cylindrical piston pin 10 are integrally cast, and the integrally cast slider piston pin member is connected with the square protruding part of the piston 3 by a hinge pair, and adopts a connecting rod big end structure similar to that of a traditional machine. , the two square protrusions on the piston are designed as two semicircular pin holes to form the piston pin hole seat (the cylinder 7.2 in embodiment 1 is canceled). Designed in this way, the slide block in the deeper groove will not be affected by the gap, and the slide block 9 on the other side is driven by the piston pin 10 to run along the normal track. The solution of this embodiment is also applicable to multi-cylinder compressors.

The beneficial effect of this embodiment is that the shape of the slider 9 can be made into an arc that completely coincides with the circular groove to form a more complete low-level structure.

The embodiments of the present invention have been described above with reference to the accompanying drawings, and the embodiments and features in the embodiments of the present invention can be combined with each other if there is no conflict. The present invention is not limited to the above specific implementation, the above specific implementation is only illustrative, rather than limiting, those skilled in the art under the enlightenment of the present invention, without departing from the purpose and rights of the present invention In the case of requiring the scope of protection, many forms can also be made, and these all belong to the scope of protection of the present invention.

Claims

A compressor, comprising a stator and a rotor, characterized in that:

The rotor includes a rotating shaft and at least one cylinder, the cylinder is fixedly connected to the rotating shaft, and the center line of the cylinder is perpendicular to the center line of the rotating shaft, and the intersection point falls on the midpoint of the center line of the cylinder; Pistons are arranged at both ends of the cylinder, and the two pistons are distributed on both sides of the rotating shaft;

The stator includes a housing, the housing has a space for accommodating the cylinder, the housing is provided with grooves on both sides perpendicular to the rotating shaft, the grooves are elliptical grooves, and The center of the elliptical groove coincides with the center line of the rotating shaft;

Corresponding to each of the pistons, two guide grooves are provided on the side wall of the cylinder, the extension direction of the guide grooves is parallel to the centerline of the cylinder, and the centerline of the two guide grooves is aligned with the rotating shaft. The center line of the cylinder and the center line of the cylinder are all located on the same plane, and the piston includes two protrusions, and the two protrusions respectively pass through two guide grooves and extend into the groove of the housing;

One end of the rotating shaft protrudes out of the housing for receiving power input, and an air hole communicating with the inner cavity of the cylinder is provided in the rotating shaft, and the air hole is used for intake air and/or exhaust air.
The compressor according to claim 1, wherein the protruding part comprises a square slider on the inside and a cylinder on the outside, the square slider is located in the guide groove, and the cylinder located in the groove.
The compressor according to claim 2, wherein a slider is sleeved on the cylinder, and the slider is located in the groove.
The compressor according to claim 3, wherein the two outer surfaces of the slider facing the groove are arc surfaces.
The compressor according to claim 1, wherein four cylinders are accommodated in the housing, and two adjacent cylinders are distributed at intervals of 90° with respect to the rotating shaft.
The compressor according to claim 1, wherein the casing has a sleeve sleeved on the rotating shaft, and the sleeve is provided with an air inlet and an exhaust port, and the rotating shaft The air hole can selectively communicate with the air inlet or the air outlet.
A compressor according to claim 1, wherein the groove is replaced by two circular grooves intersecting each other, and the geometric centers of the two circular grooves are both deviated from the centerline of the rotating shaft , the midpoint of the line connecting the geometric centers of the two circular grooves is located on the centerline of the rotating shaft, and the protrusions corresponding to the two pistons of a cylinder extend into different circular grooves;

The protrusion includes a square slider on the inside and a cylinder on the outside, the square slider is located in the guide groove; the cylinder is sleeved with a slider, and the slider is located in the groove middle.
The compressor according to claim 7, wherein the slider is arc-shaped, and its length is more than twice the length of the intersection of the two circular grooves.
The compressor according to claim 8, characterized in that, the depth of a pair of circular grooves at diagonal positions on both sides of the housing is deeper than that of the other pair of circular grooves, and the corresponding sliders It also deepens synchronously.
A compressor according to claim 9, wherein the above-mentioned cylinder is cancelled, and the two sliders on the same piston are integrally cast with the cylindrical piston pin, and the integrally cast slider piston pin components , connected with the square slider of the piston with a hinge pair.