CN221664920U - Multistage spherical compressor - Google Patents

Abstract

The patent discloses a multistage spherical compressor, wherein a cylinder body and a cylinder cover form a spherical inner cavity, a rotating sleeve hole is formed in the inner spherical surface of the cylinder cover, and a rotating disc shaft hole is formed below the cylinder body; the spherical top surface of the piston is provided with a sliding shoe, and a sector groove is arranged below the piston pin seat; a rotary disc shaft is arranged at the lower part of the spherical surface of the rotary disc, and a fan-shaped protruding block matched with the fan-shaped groove is arranged above the pin seat of the rotary disc; the piston and the rotary disc are arranged in the spherical inner cavity; the sliding shoe rotating sleeve is arranged in the rotating sleeve hole, the sliding shoe is arranged in a sliding groove below the end surface of the sliding shoe rotating sleeve, and the rotating disc shaft extends out of the cylinder body from the rotating disc shaft hole; the lower end of the cylinder body is provided with a rolling rotor compression part; driving the turntable shaft to rotate, forming first-stage compression at the rolling rotor compression part, and forming second-stage compression and third-stage compression or expansion in the spherical inner cavity; the advantages are that: the motion dead point problem of the multistage spherical compressor is thoroughly solved from the motion mechanism; the structure is light and handy, has reduced multistage compressor's volume.

Description

A multi-stage spherical compressor

Technical Field

The invention relates to a compressor, in particular to a multi-stage spherical compressor.

Background Art

The spherical compressor is a variable volume mechanism with a completely new structure invented in recent years. Like piston compressors, rolling rotor compressors, scroll compressors, and screw compressors, it can be used in different application fields and exerts its own advantages. The spherical compressor has the unique advantages of simple structure, few moving parts, no inlet and outlet valves, reliable sealing, high pressure and easy miniaturization design. In particular, multiple working rooms can be formed in a spherical cylinder to achieve multi-stage compression. For example, the multi-stage spherical compressor disclosed in the Chinese patent with patent number 200610104569.8 and patent name "spherical compressor capable of achieving multi-stage compression" increases the working fluid pressure step by step through multi-stage compression.

However, since the rotation of the piston of the spherical compressor is powered by a main shaft with an eccentric shaft hole, when the main shaft rotates to the point where the axis of the turntable coincides with the axis of the piston, the resultant force of the main shaft on the turntable is perpendicular to the axis of the piston and the turntable. The resultant force of the main shaft on the turntable cannot generate a torque component at this position to drive the piston and the turntable to rotate around their respective axes, and the turntable and the piston cannot rotate. This is the dead point of the movement of the spherical compressor mechanism of this structure. The rotor needs to pass through the movement inertia of the mechanism to operate normally when passing through the dead point position; when the movement state is the starting state at the dead point position or stops rotating at the dead point state, it cannot be started next time. To this end, in the technical solution of this patent, permanent magnets are respectively arranged on the rotating surfaces where the main shaft contacts the cylinder body, and the opposite surfaces of the two permanent magnets have the same polarity. The repulsive force with the same polarity is used to push the main shaft away from the dead point position at a certain angle to prevent it from stopping at the dead point. However, this method has poor versatility and reliability. For structures with larger structural dimensions, good lubrication and smaller friction, the friction can be overcome by the inertia of movement to allow the rotor to pass the dead point position. However, for structures with smaller structural dimensions and poorer lubrication conditions, they are still prone to getting stuck and stopping at the dead point due to their small inertia and large friction.

In the subsequent application development of the patent technology with patent number 200610104569.8, new technology research and development and innovative design are continuously carried out to improve the over-dead point technology of spherical compressors, such as the Chinese patents with patent numbers 2013101006975 and the name "a turntable rotation synchronization mechanism for spherical compressors", patent number 201410100390X and the name "a spherical compressor rotor anti-dead mechanism" and patent number 2014105548366 and the name "a spherical compressor anti-dead power mechanism", among which patent number 20131010069 Patent No. 75 is to set a turntable synchronization mechanism consisting of an elastic steel ball and a concave slideway between the inner spherical surface of the cylinder body and the spherical surface of the turntable, and the elastic steel ball is used to instantaneously rotate the torque to make the rotor pass the dead point, but the concave slideway occupies the sealing surface, resulting in reduced sealing performance. At the same time, the concave slideway trajectory curve is complex and difficult to process; Patent No. 201410100390X is to set a concave slideway on the inner spherical surface of the cylinder body or the inner spherical surface of the cylinder seat, set a guide pin on the rotor, and provide the rotor rotation torque at the dead point through the guide pin. Although the sealing loss problem is solved, the concave slideway is difficult to process, and the structural parts are increased, and the structure is complex. Patent No. 2014105548366 is to set a track limit surface on the cylinder seat or the cylinder body, and set a power handle on the rotor. The torque of the rotor rotation is generated by the power handle and the track limit surface. However, the track limit surface processing points are complex, and the number of parts is increased, there are many vulnerable parts, and the structure is complex.

At the same time, since the spherical compressor is a constant volume ratio compressor, the technical solution described in the patent No. 200610104569.8 cannot achieve variable working conditions and cannot work efficiently when the working conditions change.

Summary of the invention

The purpose of the present invention is to design a multi-stage spherical compressor, fundamentally eliminate the dead points in the operation of the rotor by redesigning the structure of the spherical compressor, improve the reliability of the multi-stage spherical compressor, and design the layout of each stage of compression so that it can be suitable for variable operating conditions.

The technical solution of this patent is: a multi-stage spherical compressor, including a cylinder head, a cylinder body, a piston, a turntable, a sliding shoe swivel sleeve, a side support and a fan-shaped slider; the cylinder body and the cylinder head respectively have a hemispherical inner cavity, which are combined into a spherical inner cavity after being fixedly connected, a swivel sleeve hole is arranged on the inner spherical surface of the cylinder head, and a turntable shaft hole connected to the outside of the cylinder is arranged at the bottom of the cylinder body; the piston has a spherical top surface, a sliding shoe protrudes from the center of the spherical top surface, a piston pin seat is arranged at the lower end of the piston, and a fan-shaped groove is arranged in the center below the piston pin seat; the turntable has a turntable spherical surface, a turntable shaft protrudes from the lower center of the turntable spherical surface, a turntable pin seat matching the piston pin seat is arranged at the upper end of the turntable spherical surface, and a fan-shaped protrusion matching the fan-shaped groove is arranged in the upper center of the turntable pin seat; the piston pin seat and the turntable pin seat form a cylindrical hinge through a center pin, and the cylindrical hinge The two ends are respectively recessed inward to form a cylindrical groove; one end of the side support shown is a flat end face, a center axis hole is arranged in the center of the flat end face, and the other end is a spherical surface adapted to the piston and the spherical surface of the turntable; there are two side supports on the left and right, which are respectively placed in the cylindrical grooves at the two ends of the cylindrical hinge, the outer circle of the side support is adapted to the inner hole of the cylindrical groove at the two ends of the cylindrical hinge, and are fixedly connected to the two ends of the piston pin seat by positioning screws, and the two ends of the center pin extend out of the turntable pin seat and are respectively inserted into the center axis holes of the side supports on both sides; a fan-shaped slideway that passes through the direction of the cylindrical hinge axis is arranged on the turntable body, the shape of the fan-shaped slider is adapted to the shape of the fan-shaped slideway, the upper and lower arc surfaces of the fan-shaped slider are in contact with the upper and lower arc surfaces of the fan-shaped slideway to form a sealed dynamic fit, and the two end faces of the fan-shaped slider are in contact with the flat end faces of the side supports at the two ends and are fixedly connected by positioning screws;

The central axis of the cylindrical hinge coincides with the central axis of the circular arc of the sector groove and the sector slideway and passes through the center of the spherical inner cavity. The central axis of the sliding shoe is an axis that passes through the center of the spherical top surface of the piston and the center of the spherical inner cavity. The two parallel faces of the sliding shoe are symmetrically arranged on both sides of the central axis of the sliding shoe and are parallel to the center line of the cylindrical hinge. The axis of the turntable shaft forms an angle with the axis of the rotating sleeve hole and the central axis of the sliding shoe respectively, and the axis of the turntable shaft and the axis of the rotating sleeve hole both pass through the center of the spherical inner cavity.

The piston and the turntable are placed in the spherical inner cavity, and the piston spherical surface, the turntable spherical surface, and the outer spherical surface of the side support respectively form a sealed dynamic fit with the ball inner cavity; the sliding shoe swivel sleeve is placed in the swivel sleeve hole, the sliding shoe is placed in the slide groove below the end surface of the sliding shoe swivel sleeve, and the turntable shaft extends out of the cylinder body from the turntable shaft hole; when the turntable shaft is driven to rotate, a second chamber A and a second chamber B with alternating volumes are formed between the two side surfaces of the fan-shaped slideway of the turntable, the two side surfaces of the fan-shaped slider, and the flat end surfaces of the two side supports, and a third chamber A and a third chamber B with alternating volumes are formed between the two side surfaces of the fan-shaped groove at the center of the lower end of the piston pin seat, the two side surfaces of the fan-shaped protrusion at the center of the upper end of the turntable pin seat, and the flat end surfaces of the two side supports; a fourth chamber A and a fourth chamber B with alternating volumes are formed between the lower end surface of the piston pin seat, the upper end surface of the turntable pin seat, and the flat end surfaces of the two side supports;

Furthermore, an eccentric wheel is arranged on the turntable shaft extending out of the cylinder body, and a circular rolling rotor cylinder body is arranged on the lower end surface of the cylinder body. The turntable shaft drives the eccentric wheel to rotate in the rolling rotor cylinder body to form a rolling rotor compression part; when the turntable shaft is driven to rotate, a first chamber A and a first chamber B with alternating volumes are formed in the rolling rotor compression part;

Furthermore, a through hole is provided on the turntable pin seat, and the two ends of the through hole are connected to the fourth chamber A and the fourth chamber B respectively; the rolling rotor compression part is used as the first stage compression, the second chamber A and the second chamber B are used as the second stage compression, and the third chamber A and the third chamber B are used as the third stage compression or expansion to form a three-stage compression or two-stage compression and one-stage expansion compressor;

Furthermore, a through hole is provided on the turntable pin seat, and the two ends of the through hole are connected to the fourth chamber A and the fourth chamber B respectively; the circulating working fluid of the multi-stage compressor adopts carbon dioxide, the rolling rotor compression part serves as the first stage compression, the second chamber A and the second chamber B serve as the second stage compression, and the third chamber A and the third chamber B serve as the expansion stage, thereby constituting a carbon dioxide spherical expansion compressor;

Further, the rolling rotor compression part is used as the first stage compression, the second chamber A and the second chamber B are used as the second stage compression, the third chamber A and the third chamber B are used as the third stage compression or expansion, and the fourth chamber A and the fourth chamber B are used as the fourth stage compression, forming a four-stage compression or three-stage compression and one-stage expansion compressor;

Furthermore, the upper end surface of the rolling rotor cylinder body is fixedly attached to the lower end surface of the cylinder body, an end cover is arranged on the lower end surface of the rolling rotor cylinder body, the eccentric wheel connected to the turntable shaft is placed in the end cover and the cylindrical inner cavity of the rolling rotor cylinder body, the valve plate is elastically arranged between the outer arc of the eccentric wheel and the inner arc of the rolling rotor cylinder body, thereby forming a first chamber A and a first chamber B, the eccentric wheel rotates with the turntable shaft, and the volumes of the first chamber A and the first chamber B change alternately; the rolling rotor cylinder body is respectively provided with a first air inlet hole and a first exhaust hole connected to the outside of the cylinder, the first air inlet hole is connected to the first chamber A to form an air intake studio of the rolling rotor compression part, and the first exhaust hole is connected to the first chamber B to form an exhaust studio of the rolling rotor compression part; an air inlet valve is arranged on the first air inlet hole, and an exhaust valve is arranged on the first exhaust hole;

Furthermore, a semi-cylindrical hole opening downward is provided on the lower end surface of the piston pin seat, the fan-shaped groove is recessed in the center of the inner circumference of the semi-cylindrical hole and penetrates along the axial direction of the semi-cylindrical hole, and is fan-shaped on a cross section perpendicular to the axis of the semi-cylindrical hole; a raised semi-circular ring body is provided on the upper part of the turntable pin seat, the center hole of the semi-circular ring body serves as the center hole of the piston pin seat, and the center pin is inserted into the center hole as the rotation axis of the cylindrical hinge, the axis of the semi-circular ring body coincides with the axis of the semi-cylindrical hole of the piston pin seat, and the outer circumference of the semi-circular ring body fits with the inner circumference of the semi-cylindrical hole; the fan-shaped protrusion protrudes from the center of the outer circumference of the semi-circular ring body and penetrates along the axial direction of the semi-circular ring body, and is fan-shaped on a cross section perpendicular to the axis of the semi-circular ring body;

Furthermore, a second air inlet hole and a second air outlet hole are provided on the cylinder body, and a second air inlet channel and a second air outlet channel are provided on the spherical surface of the cylinder body, one end of the second air inlet hole is connected to the second air inlet channel, and the other end is connected to the outside of the cylinder body; one end of the second air outlet hole is connected to the second row channel, and the other end is connected to the outside of the cylinder body; turntable airways are respectively provided on both sides of the fan-shaped slideway of the turntable, one end of one turntable airway is connected to the second chamber A, and one end of the other turntable airway is connected to the second chamber B, and the other ends of the two turntable airways are respectively provided on the spherical surface of the turntable, when the turntable shaft rotates, the volume of the second chamber A and the second chamber B changes alternately, when the volume becomes larger and needs to be inhaled, the chamber that needs to be inhaled is connected to the second air inlet channel through the turntable airway connected thereto, and inhales gas through the second air inlet hole; when the volume becomes smaller and needs to be exhausted, the chamber that needs to be exhausted is connected to the second exhaust channel through the turntable airway connected thereto, and discharges high-pressure gas through the second exhaust hole;

Furthermore, two piston air channels are arranged on the piston, one end of one piston air channel is connected to the third chamber A, one end of the other piston air channel is connected to the third chamber B, the other ends of the two piston air channels are arranged on the piston spherical surface, a third intake channel and a third exhaust channel are arranged on the inner spherical surface of the cylinder head, a third intake hole and a third exhaust hole are arranged on the cylinder head, one end of the third intake hole is connected to the third intake channel, and the other end is connected to the outside of the cylinder head, one end of the third exhaust hole is connected to the third exhaust channel, and the other end is connected to the outside of the cylinder head; when the turntable shaft rotates, the volumes of the third chamber A and the third chamber B change alternately, when the volume becomes larger and needs to be inhaled, the chamber that needs to be inhaled is connected with the third intake channel through the piston air channel connected to it, and inhales gas through the third intake hole, when the volume becomes smaller and needs to be exhausted, the chamber that needs to be exhausted is connected with the third exhaust channel through the piston air channel connected to it, and exhausts gas through the third exhaust hole.

The advantages of this patent are:

1) The problem of dead point in the movement of spherical multi-stage compressors is completely solved from the perspective of movement mechanism: the spherical compressor described in this patent has a slipper at the end of the piston shaft, the slipper sleeve rotates in the sleeve hole on the spherical surface inside the cylinder head, and the slipper swings back and forth in the slide groove inside the slipper sleeve. The turntable shaft directly drives the turntable to rotate as the driving shaft. The turntable drives the piston to rotate (at this time, the piston rotates around the axis of the sleeve hole, and the slipper swings back and forth in the slide groove of the slipper sleeve). At the same time, the piston and the turntable swing relative to each other, thereby making the spherical compressor a dead point-free mechanism.

2) The structure is light and simple, which simplifies the structure of the multi-stage compressor and reduces the volume of the multi-stage compressor: multiple groups of compressible working chambers are integrated in a spherical cavity to form multi-stage compression, and a rolling rotor compression part is arranged at the lower part of the turntable shaft, which has high integration and unique structure.

3) Variable operating condition operation can be realized: The rolling rotor type compression part can be operated as a variable operating condition, prepare the compression medium for each stage of compression of the spherical compressor, and realize the efficient operation of multi-stage compression.

4) As a spherical expansion compressor, it can be used for carbon dioxide compression refrigeration. A pair of working chambers (the third chamber A and the third chamber B) formed between the piston pin seat and the turntable pin seat serve as expansion working chambers. The compression and expansion mechanical movements interact with each other. When the compression working chamber performs a compression stroke, the expansion working chamber uses the movement trend of the compression-stage working chamber to expand, so that compression and expansion assist each other, the expander does less work, has high efficiency, and saves energy and reduces emissions.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1: Front view of the multi-stage spherical compressor described in this patent;

Figure 2: Bottom view of the multi-stage spherical compressor described in this patent;

Figure 3: B-B cross-sectional view in Figure 2;

Figure 4: A-A sectional view in Figure 1;

Figure 5: Schematic diagram of the three-dimensional structure of the cylinder head;

Figure 6: Schematic diagram of the three-dimensional structure of the cylinder;

Figure 7: Schematic diagram of the three-dimensional structure of the side support;

Figure 8: Schematic diagram of the three-dimensional structure of the sliding shoe rotating sleeve;

Figure 9: Schematic diagram of the three-dimensional structure of the piston;

Figure 10: Schematic diagram of the three-dimensional structure of the turntable;

Figure 11: Schematic diagram of the three-dimensional structure of the rolling rotor cylinder;

Figure 12: Schematic diagram of the three-dimensional structure of the rotor assembly;

Figure 13: Exploded view of the rotor assembly;

In the figure:

1-cylinder head; 11-third air inlet hole; 12-third air outlet hole; 13-third air inlet passage; 14-third air outlet passage; 15-swivel hole;

2-piston; 21-piston airway; 22-slipper; 23-sector groove;

3-turntable; 31-turntable airway; 32-through hole; 33-sector-shaped protrusion; 34-center hole; 35-sector-shaped slide groove; 36-turntable shaft;

4-cylinder body; 41-second air inlet hole; 42-second air outlet hole; 43-second air inlet passage; 44-second air outlet passage; 45-turntable shaft hole;

5-side support; 50-positioning screw; 51-center axis hole;

6- fan-shaped slider;

7-rolling rotor cylinder; 701-compression spring; 702-valve plate; 703-key; 704-eccentric wheel; 705-first air inlet hole; 706-first exhaust hole; 707-cylindrical inner cavity; 708-valve seat groove;

8-end cap;

9-Center pin;

10-slip boot swivel;

101-third chamber A; 102-third chamber B; 103-fourth chamber A; 104-fourth chamber B; 105-second chamber A; 106-second chamber B; 107-first chamber A; 108-first chamber B.

DETAILED DESCRIPTION

The present invention is described in detail below with reference to the accompanying drawings and specific implementation methods.

As shown in Figures 1 to 6, the multi-stage spherical compressor described in this patent includes a cylinder head 1, a piston 2, a turntable 3, a cylinder body 4, two side supports 5, a fan-shaped slider 6, a rolling rotor cylinder body 7, an end cover 8, a center pin 9 and a sliding shoe sleeve 10. The cylinder body 4 and the cylinder head 3 both have a hemispherical inner cavity, which is fixedly connected by screws to form a spherical inner cavity. A sleeve hole 15 is provided on the inner spherical surface of the cylinder head 1, and a turntable shaft hole 45 connected to the outside of the cylinder is provided at the lower end of the cylinder body 4. The piston 2 and the turntable 3 are connected by a cylindrical hinge formed by the center pin 9 and the two side supports 5, and the center line of the cylindrical hinge passes through the center of the spherical inner cavity.

As shown in Figure 9, the piston 2 has a spherical top surface, and a sliding shoe 22 protrudes from the center of the spherical top surface. The central axis of the sliding shoe 22 is an axis passing through the center of the spherical top surface of the piston 2 and the center of the spherical inner cavity. The two parallel faces of the sliding shoe 22 are symmetrically arranged on both sides of the central axis of the sliding shoe 22 and are parallel to the center line of the cylindrical hinge; a piston pin seat is provided at the lower end of the piston 2, and a semi-cylindrical hole opening downward is provided on the lower end surface of the piston pin seat, and a fan-shaped groove 23 penetrating along the axial direction of the semi-cylindrical hole is provided at the center of the inner circumference of the semi-cylindrical hole, and the fan-shaped groove 23 is fan-shaped in a cross section perpendicular to the axis of the semi-cylindrical hole.

As shown in Figure 10, the turntable 3 has a turntable spherical surface, a turntable shaft 36 protrudes from the lower center of the turntable spherical surface, a turntable pin seat matching the piston pin seat is arranged at the upper end of the turntable spherical surface, and a raised semi-circular ring body is arranged on the upper part of the turntable pin seat, and the center hole of the semi-circular ring body serves as the center hole 34 of the turntable pin seat, and the center hole 34 coincides with the axis of the semi-cylindrical hole of the above-mentioned piston pin seat, and the outer circumference of the semi-circular ring body fits with the inner circumference of the semi-cylindrical hole of the piston pin seat; a fan-shaped protrusion 33 matching the fan-shaped groove 23 is arranged in the center above the outer circumference of the semi-circular ring body of the turntable pin seat; the fan-shaped protrusion 33 protrudes from the center of the outer circumference of the semi-circular ring body of the turntable pin seat and penetrates along the axial direction of the semi-circular ring body, and is fan-shaped on the cross section perpendicular to the axis of the semi-circular ring body.

The semi-cylindrical hole of the piston pin seat is adapted to the semi-circular body of the turntable pin seat, the fan-shaped groove 23 of the piston pin seat is adapted to the fan-shaped protrusion 33 of the turntable pin seat, the center pin 9 is inserted into the center hole 34 and cooperates with the two side supports 5 to combine the piston pin seat and the turntable pin seat into a cylindrical hinge connection, the piston 2 can swing relative to the turntable 3 around the center pin 9, and a sealed dynamic fit is formed between the inner circumference of the semi-cylindrical hole and the outer circumference of the semi-circular body, and between the inner circumference of the fan-shaped groove 23 and the outer circumference of the fan-shaped protrusion 33.

Cylindrical grooves are provided at both ends of the cylindrical hinge, and the cylindrical grooves are formed by the inward concave ends of the piston pin seat and the turntable pin seat; as shown in Figure 7, one end of the side support 5 is a flat end face, and a central axis hole 51 is provided in the center of the flat end face, and the other end is a spherical surface that matches the spherical surface of the piston 2 and the turntable 4; three screw connection holes are provided on the side support 5, and the screw holes are step holes. The aperture on the side close to the flat end face is matched with the positioning rod of the positioning screw 50, which is used for positioning the positioning screw, and the aperture on the side close to the spherical surface is matched with the screw head size of the positioning screw 50, which is used to sink the screw head. The head of the positioning screw used is a spherical surface, and the ball of the screw head is formed after the screw is installed. The surface is adapted to the spherical surface of the side support 5 and does not protrude from the spherical surface of the side support 5; there are two side supports 5 on the left and right, which are respectively placed in the cylindrical grooves at both ends of the cylindrical hinge, and the outer circle shape of the side support 5 is adapted to the cylindrical grooves at both ends of the cylindrical hinge. Two threaded holes are arranged on the bottom surface of the cylindrical groove formed at the end of the piston pin seat, and the side support 5 on each side is fixedly connected to the bottom surface of the recessed grooves at both ends of the piston pin seat by two positioning screws 50; after the two ends of the center pin 9 extend out of the turntable pin seat, they are respectively inserted into the central axis holes 51 of the side supports 5 on both sides, forming a rotating support for the center pin 9; the side supports 5 on both sides are fixedly connected to the piston 2 and can swing back and forth around the center pin 9 relative to the turntable 3 with the piston 2.

A sector slideway 35 is provided on the turntable pin seat, which is passed through along the axis direction of the center hole 34. The shape of the sector slider 6 is adapted to the shape of the sector slideway 35. The upper and lower arc surfaces of the sector slider 6 fit with the upper and lower arc surfaces of the sector slideway 35 to form a sealed dynamic fit. The two end surfaces of the sector slider 6 fit with the flat end surfaces of the two end side supports 5. Threaded holes are provided on the two end surfaces of the sector slider 6. The positioning screws 50 pass through the screw holes on the side supports 5 to fix the sector slider 6 to the side supports 5 on both sides. When the piston 2 reciprocates around the center pin 9 relative to the turntable 4, the sector slider 6 reciprocates in the sector slideway 35.

In the above structure, the central axis of the cylindrical hinge coincides with the central axis of the circular arc of the fan-shaped groove 23, the fan-shaped protrusion 33, the fan-shaped slider 6, and the fan-shaped slideway 35 and passes through the center of the spherical inner cavity. The axis of the turntable shaft 36 forms an angle α with the axis of the rotating sleeve hole 15 and the central axis of the sliding shoe 22, respectively. The value of the angle α is 5-15 degrees, and the axis of the turntable shaft 36 and the axis of the rotating sleeve hole 15 both pass through the center of the spherical inner cavity.

A rolling rotor cylinder 7 and an end cover 8 are connected in sequence on the lower end surface of the cylinder 4 by screws, as shown in Figures 1, 3, 4, and 11. The rolling rotor cylinder 7 is annular, and the end cover 8 is fitted on the lower end surface of the rolling rotor cylinder 7 to form a cylindrical inner cavity 707. After the turntable shaft 36 extends out of the turntable shaft hole 45 of the cylinder 4, the eccentric wheel 704 is fixedly connected to the shaft neck of the turntable shaft 36 extending out of the turntable shaft hole 45 through the key 703. The eccentric wheel 704 is placed In the above-mentioned cylindrical inner cavity 707, a valve seat groove 708 is also arranged on the rolling rotor cylinder body 7, and the valve plate 702 and the compression spring 701 are placed in the valve seat groove. The valve plate 702 is elastically pressed between the outer arc of the eccentric wheel and the inner arc of the rolling rotor cylinder body 7 by the spring, thereby forming the first chamber A107 and the first chamber B108; a through hole of the turntable shaft 36 is arranged in the center of the end cover 8, which together with the turntable shaft hole 45 on the cylinder body 4 constitutes a rotating support for the turntable shaft 36. The eccentric wheel 704 rotates together with the turntable shaft 36, and the volumes of the first chamber A107 and the first chamber B108 change alternately, thereby forming a rolling rotor compression section; a first air inlet hole 705 and a first exhaust hole 706 connected to the outside of the cylinder are respectively provided on the rolling rotor cylinder body 7, the first air inlet hole 705 is connected with the first chamber A107 to form an intake working room of the rolling rotor compression section, and the first exhaust hole 706 is connected with the first chamber B108 to form an exhaust working room of the rolling rotor compression section; an air inlet valve is provided on the first air inlet hole 705, and an exhaust valve is provided on the first exhaust hole 706; the rolling rotor compression section is a variable compression, and the operating parameters of the compressor can be adjusted according to the operating conditions of the compressor to achieve variable operating conditions to maximize the efficiency of the compressor.

As shown in Fig. 1 and Fig. 3, the cylinder head 1, the cylinder body 4, the rolling rotor cylinder body 7, and the end cover 8 are fixedly connected in sequence to form the stator of the multi-stage spherical compressor described in this patent; as shown in Fig. 12 and Fig. 13, the piston 2, the turntable 3, the two side supports 5, the center pin 9, the eccentric wheel 704 and the sliding shoe sleeve 10 are combined to form the rotor of the multi-stage spherical compressor described in this patent; the piston 2 and the turntable 3 are connected to form a cylindrical hinge through the center pin 9 and the two side supports 5, and the cylinder body 4 and the cylinder head 1 placed in the stator form a spherical inner In the cavity, the turntable shaft 36 of the turntable 3 extends out of the cylinder body 4 from the turntable shaft hole 45 below the cylinder body 4; as shown in Figure 8, the sliding shoe swivel sleeve 10 is a cylinder with a sliding groove on the lower end surface, and the outer dimensions of the sliding shoe swivel sleeve 10 are matched with the dimensions of the swivel sleeve hole 15 on the spherical surface inside the cylinder head 1. The sliding shoe swivel sleeve 10 is placed in the swivel sleeve hole 15 and can rotate around the axis of the swivel sleeve hole 15. The opening of the sliding groove faces downward, and the size of the sliding groove is matched with the sliding shoe 22 on the central protrusion of the spherical surface of the piston 2, and the sliding shoe 22 can slide back and forth in the sliding groove.

When the turntable shaft 36 is driven to rotate, a first chamber A107 and a first chamber B108 with alternating volumes are formed in the compression part of the rolling rotor; a second chamber A105 and a second chamber B106 with alternating volumes are formed between the two side surfaces of the fan-shaped slideway 35 of the turntable pin seat of the turntable 3, the two side surfaces of the fan-shaped slider 6, and the flat end surfaces of the two side supports; a third chamber A101 and a third chamber B102 with alternating volumes are formed between the two side surfaces of the fan-shaped groove 23 at the center of the lower end of the piston pin seat of the piston 2, the two side surfaces of the fan-shaped protrusion 33 at the center of the upper end of the turntable pin seat of the turntable 3, and the flat end surfaces of the two side supports; a fourth chamber A103 and a fourth chamber B104 with alternating volumes are formed between the lower end surface of the piston pin seat of the piston 2, the upper end surface of the turntable pin seat of the turntable 3, and the flat end surfaces of the two side supports.

A second air inlet hole 41 and a second air exhaust hole 42 are provided on the cylinder body 4, and a second air inlet channel 43 and a second air exhaust channel 44 are provided on the inner spherical surface of the cylinder body 4. The second air inlet channel 43 and the second air exhaust channel 44 are arc grooves distributed on a circumference with the axis of the turntable shaft hole 45 as the center; one end of the second air inlet hole 41 is connected to the second air inlet channel 43, and the other end is connected to the outside of the cylinder body 4; one end of the second air exhaust hole 42 is connected to the second exhaust channel 44, and the other end is connected to the outside of the cylinder body 4; turntable air channels 31 are respectively provided on both sides of the fan-shaped slideway 35 of the turntable 3, and one end of a turntable air channel 31 is connected to the second chamber A10 5, one end of the other turntable air passage 31 is connected to the second chamber B106, and the other ends of the two turntable air passages 31 are respectively arranged on the spherical surface of the turntable 3. When the turntable shaft 36 rotates, the volumes of the second chamber A105 and the second chamber B106 change alternately. When the volume becomes larger and needs to be inhaled, the chamber that needs to be inhaled is connected with the second air inlet passage 43 through the turntable air passage 31 connected thereto, and inhales gas through the second air inlet hole 41; when the volume becomes smaller and needs to be exhausted, the chamber that needs to be exhausted is connected with the second exhaust passage 44 through the turntable air passage 31 connected thereto, and discharges high-pressure gas through the second exhaust hole 42.

Two piston air passages 21 are arranged on the piston 2, one end of one piston air passage 21 is connected to the third chamber A101, and one end of the other piston air passage 21 is connected to the third chamber B102, and the other ends of the two piston air passages 21 are arranged on the piston spherical surface, and a third intake channel 13 and a third exhaust channel 14 are arranged on the inner spherical surface of the cylinder head 1, and the third intake channel 13 and the third exhaust channel 14 are arc grooves distributed on a circumference with the axis of the rotating sleeve hole 15 as the center; a third intake hole 11 and a third exhaust hole 12 are arranged on the cylinder head 1, and one end of the third intake hole 11 is connected to the third intake passage One end of the third exhaust hole 12 is connected to the third exhaust passage 14, and the other end is connected to the outside of the cylinder head 1; when the turntable shaft 36 rotates, the volumes of the third chamber A101 and the third chamber B102 change alternately. When the volume becomes larger and needs to be inhaled, the chamber that needs to inhale is connected to the third intake passage 13 through the piston air passage 21 connected thereto, and gas is inhaled through the third intake hole 11. When the volume becomes smaller and needs to be exhausted, the chamber that needs to be exhausted is connected to the third exhaust passage 14 through the piston air passage 21 connected thereto, and gas is exhausted through the third exhaust hole 12.

In order to prevent the fourth chamber A103 and the fourth chamber B104 from generating compression and doing no work on the gas, thus reducing power consumption, a through hole 32 is provided on the turntable pin seat of the turntable 3, and the two ends of the through hole 32 are respectively connected to the fourth chamber A103 and the fourth chamber B104, so that the pressure in the fourth chamber A103 and the fourth chamber B104 is balanced. Of course, the inlet hole and the exhaust hole of the fourth chamber A103 and the fourth chamber B104 can also be provided on the cylinder head 1, and the corresponding inlet channel and exhaust channel can be provided on the inner spherical surface of the cylinder head 1, and the fourth chamber A103 and the fourth chamber B104 can be selected as the working room of the compressor or expansion stage, thereby increasing the number of stages of the multi-stage compressor.

The rolling rotor compression part is used as the first stage compression, and the first chamber A107 and the first chamber B108 whose volumes change alternately are used as compression studios; the second chamber A105 and the second chamber B106 whose volumes change alternately are used as compression studios of the second stage compression; the third chamber A101 and the third chamber B102 whose volumes change alternately are used as compression studios or expansion studios of the third stage compression; the first air inlet 705 is connected to the third air outlet 12, the first air outlet 706 is connected to the second air inlet 41, and the second air outlet 42 is connected to the third air inlet 11, thereby forming a working medium cycle of a three-stage compression or a two-stage compression and one-stage expansion compressor. The two-stage compression and one-stage expansion compressor can be used to operate a carbon dioxide refrigeration working medium cycle or other refrigeration working medium cycles requiring high pressure.

Claims (9)

1. A multi-stage spherical compressor, characterized in that it includes a cylinder head, a cylinder body, a piston, a turntable, a sliding shoe swivel sleeve, a side support and a fan-shaped sliding block; the cylinder body and the cylinder head respectively have a hemispherical inner cavity, which are combined into a spherical inner cavity after being fixedly connected, a swivel sleeve hole is arranged on the inner spherical surface of the cylinder head, and a turntable shaft hole connected to the outside of the cylinder is arranged at the bottom of the cylinder body; the piston has a spherical top surface, a sliding shoe protrudes from the center of the spherical top surface, a piston pin seat is arranged at the lower end of the piston, and a fan-shaped groove is arranged at the center below the piston pin seat; the turntable has a turntable spherical surface, a turntable shaft protrudes from the center of the lower part of the turntable spherical surface, a turntable pin seat matching the piston pin seat is arranged at the upper end of the turntable spherical surface, and a fan-shaped protrusion matching the fan-shaped groove is arranged at the center above the turntable pin seat; the piston pin seat and the turntable pin seat form a cylindrical hinge through a center pin, and the two ends of the cylindrical hinge The ends are respectively recessed inward to form a cylindrical groove; one end of the side support shown is a flat end face, a center axis hole is arranged in the center of the flat end face, and the other end is a spherical surface adapted to the piston and the spherical surface of the turntable; there are two side supports on the left and right, which are respectively placed in the cylindrical grooves at both ends of the cylindrical hinge, the outer circle of the side support is adapted to the inner hole of the cylindrical groove at both ends of the cylindrical hinge, and are fixedly connected to the two ends of the piston pin seat by positioning screws, and the two ends of the center pin extend out of the turntable pin seat and are respectively inserted into the center axis holes of the side supports on both sides; a fan-shaped slideway that passes through the direction of the cylindrical hinge axis is arranged on the turntable body, the shape of the fan-shaped slider is adapted to the shape of the fan-shaped slideway, the upper and lower arc surfaces of the fan-shaped slider are in contact with the upper and lower arc surfaces of the fan-shaped slideway to form a sealed dynamic fit, and the two end faces of the fan-shaped slider are in contact with the flat end faces of the side supports at both ends and are fixedly connected by positioning screws; The central axis of the cylindrical hinge coincides with the central axis of the circular arc of the sector groove and the sector slideway and passes through the center of the spherical inner cavity. The central axis of the sliding shoe is an axis that passes through the center of the spherical top surface of the piston and the center of the spherical inner cavity. The two parallel faces of the sliding shoe are symmetrically arranged on both sides of the central axis of the sliding shoe and are parallel to the center line of the cylindrical hinge. The axis of the turntable shaft forms an angle with the axis of the rotating sleeve hole and the central axis of the sliding shoe respectively, and the axis of the turntable shaft and the axis of the rotating sleeve hole both pass through the center of the spherical inner cavity. The piston and the turntable are placed in the spherical inner cavity, and the piston spherical surface, the turntable spherical surface, and the outer spherical surface of the side support respectively form a sealed dynamic fit with the spherical inner cavity; the sliding shoe swivel sleeve is placed in the swivel sleeve hole, and the sliding shoe is placed in the slide groove below the end surface of the sliding shoe swivel sleeve, and the turntable shaft extends out of the cylinder body from the turntable shaft hole; when the turntable shaft is driven to rotate, a second chamber A and a second chamber B with alternating volumes are formed between the two side surfaces of the fan-shaped slideway of the turntable, the two side surfaces of the fan-shaped slider, and the flat end surfaces of the two side supports, and a third chamber A and a third chamber B with alternating volumes are formed between the two side surfaces of the fan-shaped groove in the center of the lower end of the piston pin seat, the two side surfaces of the fan-shaped protrusion in the center of the upper end of the turntable pin seat, and the flat end surfaces of the two side supports; a fourth chamber A and a fourth chamber B with alternating volumes are formed between the lower end surface of the piston pin seat, the upper end surface of the turntable pin seat, and the flat end surfaces of the two side supports. 2. A multi-stage spherical compressor according to claim 1, characterized in that: an eccentric wheel is arranged on the turntable shaft extending out of the cylinder body, and an annular rolling rotor cylinder body is arranged on the lower end surface of the cylinder body, and the turntable shaft drives the eccentric wheel to rotate in the rolling rotor cylinder body to form a rolling rotor compression part; when the turntable shaft is driven to rotate, a first chamber A and a first chamber B with alternating volumes are formed in the rolling rotor compression part. 3. A multi-stage spherical compressor according to claim 2, characterized in that: a through hole is set on the turntable pin seat, and the two ends of the through hole are respectively connected to the fourth chamber A and the fourth chamber B; the rolling rotor compression part serves as the first stage compression, the second chamber A and the second chamber B serve as the second stage compression, and the third chamber A and the third chamber B serve as the third stage compression or expansion to constitute a three-stage compression or a two-stage compression and one-stage expansion compressor. 4. A multi-stage spherical compressor according to claim 2, characterized in that: a through hole is set on the turntable pin seat, and the two ends of the through hole are respectively connected to the fourth chamber A and the fourth chamber B; the circulating working fluid of the multi-stage compressor adopts carbon dioxide, the rolling rotor compression part is used as the first stage compression, the second chamber A and the second chamber B are used as the second stage compression, and the third chamber A and the third chamber B are used as the expansion stage, thereby constituting a carbon dioxide spherical expansion compressor. 5. A multi-stage spherical compressor according to claim 2, characterized in that: the rolling rotor compression part serves as the first-stage compression, the second chamber A and the second chamber B serve as the second-stage compression, the third chamber A and the third chamber B serve as the third-stage compression or expansion, the fourth chamber A and the fourth chamber B serve as the fourth-stage compression, forming a four-stage compression or a three-stage compression and one-stage expansion compressor. 6. A multi-stage spherical compressor according to any one of claims 2 to 5, characterized in that: the upper end surface of the rolling rotor cylinder body is attached to the lower end surface of the cylinder body and is fixedly connected, an end cover is arranged on the lower end surface of the rolling rotor cylinder body, the eccentric wheel connected to the turntable shaft is placed in the end cover and the cylindrical inner cavity of the rolling rotor cylinder body, the valve plate is elastically arranged between the outer arc of the eccentric wheel and the inner arc of the rolling rotor cylinder body, thereby forming a first chamber A and a first chamber B, the eccentric wheel rotates with the turntable shaft, and the volumes of the first chamber A and the first chamber B change alternately; a first air inlet hole and a first exhaust hole connected to the outside of the cylinder are respectively arranged on the rolling rotor cylinder body, the first air inlet hole is connected to the first chamber A to form an intake working room of the rolling rotor compression part, and the first exhaust hole is connected to the first chamber B to form an exhaust working room of the rolling rotor compression part; an air inlet valve is arranged on the first air inlet hole, and an exhaust valve is arranged on the first exhaust hole. 7. A multi-stage spherical compressor according to claim 1, characterized in that: a semi-cylindrical hole opening downward is provided on the lower end surface of the piston pin seat, the fan-shaped groove is recessed in the center of the inner circumference of the semi-cylindrical hole and penetrates along the axial direction of the semi-cylindrical hole, and is fan-shaped in a cross section perpendicular to the axis of the semi-cylindrical hole; a raised semi-circular ring body is provided on the upper part of the turntable pin seat, the center hole of the semi-circular ring body serves as the center hole of the piston pin seat, the center pin is inserted into the center hole as the rotating axis of the cylindrical hinge, the axis of the semi-circular ring body coincides with the axis of the semi-cylindrical hole of the piston pin seat, and the outer circumference of the semi-circular ring body is fitted with the inner circumference of the semi-cylindrical hole; the fan-shaped protrusion protrudes from the center of the outer circumference of the semi-circular ring body and penetrates along the axial direction of the semi-circular ring body, and is fan-shaped in a cross section perpendicular to the axis of the semi-circular ring body. 8. A multi-stage spherical compressor according to claim 1, characterized in that: a second air inlet hole and a second air outlet hole are arranged on the cylinder body, and a second air inlet channel and a second air outlet channel are arranged on the inner spherical surface of the cylinder body, one end of the second air inlet hole is connected with the second air inlet channel, and the other end is connected to the outside of the cylinder body; one end of the second air outlet hole is connected with the second exhaust channel, and the other end is connected to the outside of the cylinder body; turntable air channels are respectively arranged on both sides of the fan-shaped slideway of the turntable, one end of one turntable air channel is connected with the second chamber A, and one end of the other turntable air channel is connected with the second chamber B, and the other ends of the two turntable air channels are respectively arranged on the spherical surface of the turntable, when the turntable shaft rotates, the volume of the second chamber A and the second chamber B changes alternately, when the volume becomes larger and needs to be inhaled, the chamber that needs to be inhaled is connected with the second air inlet channel through the turntable air channel connected thereto, and inhales gas through the second air inlet hole; when the volume becomes smaller and needs to be exhausted, the chamber that needs to be exhausted is connected with the second exhaust channel through the turntable air channel connected thereto, and discharges high-pressure gas through the second exhaust hole. 9. A multi-stage spherical compressor according to claim 1, characterized in that: two piston air passages are arranged on the piston, one end of one piston air passage is connected to the third chamber A, one end of the other piston air passage is connected to the third chamber B, the other ends of the two piston air passages are arranged on the piston spherical surface, a third air intake passage and a third exhaust passage are arranged on the inner spherical surface of the cylinder head, a third air intake hole and a third exhaust hole are arranged on the cylinder head, one end of the third air intake hole is connected to the third air intake passage, and the other end is connected to the outside of the cylinder head, one end of the third exhaust hole is connected to the third exhaust passage, and the other end is connected to the outside of the cylinder head; when the turntable shaft rotates, the volumes of the third chamber A and the third chamber B change alternately, when the volume becomes larger and needs to be inhaled, the chamber that needs to inhale is connected to the third air intake passage through the piston air passage connected thereto, and inhales gas through the third air intake hole, when the volume becomes smaller and needs to be exhausted, the chamber that needs to be exhausted is connected to the third exhaust passage through the piston air passage connected thereto, and exhausts gas through the third exhaust hole.