Multi-stage spherical compressor

Abstract

A multi-stage spherical compressor. A spherical inner cavity is formed by a cylinder body (4) and a cylinder cover (1), a rotating sleeve hole (15) being formed in an inner spherical surface of the cylinder cover (1), and a rotating disc shaft hole (45) being formed in the lower portion of the cylinder body (4). A slipper (22) is provided on the spherical top surface of a piston (2), and a fan-shaped recess (23) is formed in the lower portion of a piston pin boss. A rotating disc shaft (36) is provided on the lower portion of a spherical surface of a rotating disc (3), and a fan-shaped protrusion (33) fitted to the fan-shaped recess (23) is provided on the upper portion of a rotating disc pin boss. The piston (2) and the rotating disc (3) are provided in the spherical inner cavity. A slipper rotating sleeve (10) is provided inside the rotating sleeve hole (15), the slipper (22) is provided in a slide recess in the lower portion of an end surface of the slipper rotating sleeve (10), and the rotating disc shaft (36) extends out of the cylinder body (4) through the rotating disc shaft hole (45). A rolling rotor compression portion is provided at the lower end of the cylinder body (4). When the rotating disc shaft (36) is driven to rotate, a first-stage compression is formed at the rolling rotor compression portion, and then a second-stage compression and a third-stage compression or expansion are formed in the spherical inner cavity. The present invention has the advantage that the problem of motion dead points of multi-stage spherical compressors is thoroughly solved from the perspective of the kinematic mechanism; in addition, the multi-stage compressor has a lightweight structure, thereby reducing the size.

Description

A multi-stage spherical compressor Technical Field

[0001] The present invention relates to a compressor, in particular to a multi-stage spherical compressor. Background Art

[0002] Spherical compressors are a newly invented variable volume mechanism with a completely new structure. Like piston, rolling rotor, scroll, and screw compressors, they can be used in diverse applications, each leveraging its own unique advantages. Spherical compressors offer unique advantages, including a simple structure, few moving parts, no inlet and outlet valves, reliable sealing, high pressure capability, and easy miniaturization. In particular, they can form multiple working chambers within a spherical cylinder, enabling multi-stage compression. For example, the multi-stage spherical compressor disclosed in Chinese patent number 200610104569.8, entitled "Spherical Compressor Enabling Multi-Stage Compression," utilizes multi-stage compression to gradually increase the working fluid pressure.

[0003] 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 acting on the turntable is perpendicular to the axes of the piston and turntable. At this position, the resultant force of the main shaft acting on the turntable cannot generate a torque component that drives the piston and turntable to rotate around their respective axes, and the turntable and piston cannot be rotated. 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 exactly 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. The polarity of the opposite surfaces of the two permanent magnets is the same. 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, due to the small inertia and large friction, it is still easy to get stuck and stop at the dead point position.

[0004] In the subsequent application development of the patented technology with patent number 200610104569.8, new technology research and development and innovative design have been continuously carried out to improve the over-dead point technology of spherical compressors, such as the Chinese patents with patent numbers 2013101006975 and titled "A turntable rotation synchronization mechanism for spherical compressors", patent number 201410100390X and titled "A spherical compressor rotor anti-dead point mechanism", and patent number 2014105548366 and titled "A spherical compressor anti-dead point power mechanism", among which patent number 20131010069 Patent No. 75 uses a turntable synchronization mechanism consisting of an elastic steel ball and a concave slideway between the cylinder body sphere and the turntable sphere. The elastic steel ball's instantaneous rotational torque causes the rotor to pass through the dead point, but the concave slideway occupies the sealing surface, resulting in reduced sealing performance. Furthermore, the concave slideway has a complex trajectory curve, making machining difficult. Patent No. 201410100390X uses a concave slideway on the cylinder body sphere or the cylinder seat sphere, and guide pins on the rotor to provide rotor rotational torque at the dead point. While this solves the sealing loss problem, the concave slideway is difficult to machine, increases the number of structural parts, and complicates the structure. Patent No. 2014105548366 uses a track limit surface on the cylinder seat or cylinder body, and a power handle on the rotor. The power handle cooperates with the track limit surface to generate rotor rotational torque. However, the track limit surface requires complex machining points, which increases the number of parts, results in a large number of wearing parts, and a complex structure.

[0005] 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

[0006] The purpose of the present invention is to design a multi-stage spherical compressor, fundamentally eliminate the dead point during 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 working conditions.

[0007] 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 and a 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 provided on the inner spherical surface of the cylinder head, and a turntable shaft hole connected to the outside of the cylinder is provided 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 provided at the lower end of the piston, and a fan-shaped groove is provided in 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 provided at the upper end of the turntable spherical surface, and a fan-shaped protrusion matching the fan-shaped groove is provided in 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 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 surface, a center axis hole is provided in the center of the flat end surface, and the other end is a spherical surface adapted to the piston and the turntable spherical surface; 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, and the outer circle of the side support is adapted to the inner holes of the cylindrical grooves 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 is provided on the turntable body, which runs through the direction of the cylindrical hinge axis, and the shape of the fan-shaped slider is adapted to the shape of the fan-shaped slideway, and the upper and lower arc surfaces of the fan-shaped slider are in contact with the upper and lower arc surfaces of the fan slideway to form a sealed dynamic fit, and the two end surfaces of the fan-shaped slider are in contact with the flat end surfaces of the side supports at both ends and are fixedly connected by positioning screws;

[0008] The central axis of the cylindrical hinge coincides with the central axis of the circular arc of the sector-shaped groove and the sector-shaped 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 surfaces 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.

[0009] The piston and the turntable are placed in the spherical inner cavity, and the spherical surface of the piston, the spherical surface of the turntable, and the outer spherical surface of the side support respectively form a sealed dynamic fit with the inner cavity of the ball; the sliding shoe sleeve is placed in the rotating sleeve hole, and the sliding shoe is placed in the slide groove below the end surface of the sliding shoe 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;

[0010] Furthermore, an eccentric wheel is provided on the turntable shaft extending out of the cylinder body, and an annular rolling rotor cylinder body is provided 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.

[0011] Furthermore, a through hole is provided on the turntable pin seat, the two ends of the through hole being connected to the fourth chamber A and the fourth chamber B respectively; the rolling rotor compression portion 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 form a three-stage compression or two-stage compression and one-stage expansion compressor;

[0012] Furthermore, a through hole is provided on the turntable pin seat, with both ends of the through hole communicating with the fourth chamber A and the fourth chamber B, respectively. The circulating working fluid of the multi-stage compressor is carbon dioxide, the rolling rotor compression portion serves as the first stage of compression, the second chamber A and the second chamber B serve as the second stage of compression, and the third chamber A and the third chamber B serve as the expansion stage, thereby constituting a carbon dioxide spherical expansion compressor.

[0013] Furthermore, 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, and the fourth chamber A and the fourth chamber B serve as the fourth stage compression, forming a four-stage compression or three-stage compression and one-stage expansion compressor;

[0014] 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 provided 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 along 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 provided on the rolling rotor cylinder body, the first air inlet hole is connected to the first chamber A to form an 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 provided on the first air inlet hole, and an exhaust valve is provided on the first exhaust hole;

[0015] Furthermore, a downwardly opening semi-cylindrical hole 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 passes through in 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, 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 passes through in 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;

[0016] Furthermore, a second air inlet and a second air outlet 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 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 is connected to the second row channel, and the other end is connected to the outside of the cylinder body; turntable air channels are respectively provided on both sides of the fan-shaped slide of the turntable, one end of one turntable air channel is connected to the second chamber A, and one end of the other turntable air channel is connected to the second chamber B, and the other ends of the two turntable air channels are respectively provided on the spherical surface of the turntable, when the turntable shaft rotates, the volumes of the second chamber A and the second chamber B change alternately, when the volume increases and needs to be inhaled, the chamber that needs to inhale is connected with the second air inlet channel through the turntable air channel connected thereto, and inhales gas through the second air inlet; when the volume decreases 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 channel;

[0017] Furthermore, two piston air channels are provided on the piston, one end of one piston air channel is connected to the third chamber A, and one end of the other piston air channel is connected to the third chamber B, and the other ends of the two piston air channels are provided on the piston spherical surface, a third intake channel and a third exhaust channel are provided on the inner spherical surface of the cylinder head, and a third intake hole and a third exhaust hole are provided 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, and 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 inhale is connected to 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 to the third exhaust channel through the piston air channel connected to it, and exhausts gas through the third exhaust hole.

[0018] The advantages of this patent are:

[0019] 1) The motion dead point problem of the spherical multi-stage compressor is completely solved from the perspective of motion mechanism: the spherical compressor described in this patent has a slipper provided 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 serves as a driving shaft to directly drive the turntable to rotate, and 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.

[0020] 2) The structure is lightweight, 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 set at the lower part of the turntable shaft, with high integration and unique structure.

[0021] 3) Variable working condition operation can be realized: The rolling rotor compression part can be operated as a variable working condition, preparing the compressed working medium for each stage of compression of the spherical compressor, and realizing efficient operation of multi-stage compression.

[0022] 4) As a spherical expansion compressor, it can be used for carbon dioxide compression refrigeration. A pair of working chambers (third chamber A and 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 the 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

[0023] Figure 1: Front view of the multi-stage spherical compressor described in this patent;

[0024] Figure 2: Bottom view of the multi-stage spherical compressor described in this patent;

[0025] Figure 3: sectional view BB in Figure 2;

[0026] Figure 4: AA cross-sectional view in Figure 1;

[0027] Figure 5: Schematic diagram of the three-dimensional structure of the cylinder head;

[0028] Figure 6: Schematic diagram of the three-dimensional structure of the cylinder;

[0029] Figure 7: Schematic diagram of the three-dimensional structure of the side support;

[0030] Figure 8: Schematic diagram of the three-dimensional structure of the sliding shoe swivel sleeve;

[0031] Figure 9: Schematic diagram of the piston's three-dimensional structure;

[0032] Figure 10: Schematic diagram of the three-dimensional structure of the turntable;

[0033] Figure 11: Schematic diagram of the three-dimensional structure of the rolling rotor cylinder;

[0034] Figure 12: Schematic diagram of the three-dimensional structure of the rotor assembly;

[0035] Figure 13: Exploded view of the rotor assembly;

[0036] In the figure: 1 - cylinder head; 11 - third intake hole; 12 - third exhaust hole; 13 - third intake passage; 14 - third exhaust passage; 15 - swivel hole; 2 - piston; 21 - piston air passage; 22 - sliding shoe; 23 - sector-shaped groove; 3 - turntable; 31 - turntable air passage; 32 - through hole; 33 - sector-shaped bump; 34 - center hole; 35 - sector-shaped slide groove; 36 - turntable shaft; 4 - cylinder block; 41 - second intake hole; 42 - second exhaust hole; 43 - second intake passage; 44 - second exhaust passage; 45 - turntable shaft hole; 5 - side support; 50 - positioning screw; 51 - center shaft hole; 6 - sector-shaped slider; 7-rolling rotor cylinder; 701-compression spring; 702-valve plate; 703-key; 704-eccentric wheel; 705-first air inlet; 706-first exhaust hole; 707-cylindrical inner cavity; 708-valve seat groove; 8-end cover; 9-center pin; 10-slipper sleeve; 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

[0037] The present invention is described in detail below with reference to the accompanying drawings and specific implementation methods.

[0038] 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 swivel 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 swivel 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 to each other by a cylindrical hinge through the center pin 9 and the two side supports 5. The center line of the cylindrical hinge passes through the center of the spherical inner cavity.

[0039] 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 surfaces 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 is provided at the center of the inner circumference of the semi-cylindrical hole, which passes through along the axial direction of the semi-cylindrical hole. The fan-shaped groove 23 is fan-shaped in a cross section perpendicular to the axis of the semi-cylindrical hole.

[0040] As shown in Figure 10, the turntable 3 has a turntable spherical surface, and a turntable shaft 36 protrudes from the center of the lower part of the turntable spherical surface. A turntable pin seat matching the piston pin seat is provided at the upper end of the turntable spherical surface, and a raised semi-circular ring is provided on the upper part of the turntable pin seat. The center hole of the semi-circular ring serves as the center hole 34 of the turntable pin seat. 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 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 provided in the center above the outer circumference of the semi-circular ring of the turntable pin seat; the fan-shaped protrusion 33 protrudes from the center of the outer circumference of the semi-circular ring of the turntable pin seat and passes through along the axial direction of the semi-circular ring, and is fan-shaped on the cross section perpendicular to the axis of the semi-circular ring.

[0041] The semi-cylindrical hole of the piston pin seat is adapted to the semi-circular ring 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 ring body, and between the inner circumference of the fan-shaped groove 23 and the outer circumference of the fan-shaped protrusion 33.

[0042] Cylindrical grooves are provided at both ends of the cylindrical hinge, and the cylindrical grooves are formed by the inward recesses of the two 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 adapted to 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 adapted to the positioning rod of the positioning screw 50, and is used for positioning the positioning screw. The aperture on the side close to the spherical surface is adapted to the screw head size of the positioning screw 50, and is used to sink the screw head. The head of the positioning screw used is spherical, and the screw head spherical 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. The outer circle of the side support 5 is adapted to the cylindrical grooves at both ends of the cylindrical hinge. Two threaded holes are provided on the bottom surface of the cylindrical groove formed at the end of the piston pin seat. The side support 5 on each side is fixedly connected to the recessed groove bottom surfaces 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 to form a rotational 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.

[0043] A sector-shaped slideway 35 is provided on the turntable pin seat, extending along the axis of the center hole 34. The shape of the sector-shaped slider 6 matches that of the sector-shaped slideway 35. The upper and lower arc surfaces of the sector-shaped slider 6 fit in contact with the upper and lower arc surfaces of the sector-shaped slideway 35, forming a sealed dynamic fit. The end faces of the sector-shaped slider 6 fit in contact with the flat end faces of the side supports 5 at both ends. Threaded holes are provided on the end faces of the sector-shaped slider 6. Set screws 50 pass through the screw holes on the side supports 5 to secure the sector-shaped 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-shaped slider 6 reciprocates within the sector-shaped slideway 35.

[0044] 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 slide 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.

[0045] A rolling rotor cylinder 7 and an end cover 8 are sequentially connected 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 from 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 from 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 provided 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 for the turntable shaft 36 is provided 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 along 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 part; 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 studio of the rolling rotor compression part, and the first exhaust hole 706 is connected with the first chamber B108 to form an exhaust studio of the rolling rotor compression part; 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 part 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 operation to maximize the efficiency of the compressor.

[0046] As shown in Figures 1 and 3, the cylinder head 1, cylinder body 4, rolling rotor cylinder body 7, and 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 Figures 12 and 13, the piston 2, turntable 3, two side supports 5, center pin 9, eccentric wheel 704 and sliding shoe sleeve 10 are combined to form the rotor of the multi-stage spherical compressor described in this patent; the piston 2 and turntable 3 are connected to each other through a cylindrical hinge formed by the center pin 9 and the two side supports 5, and are placed in the spherical inner portion formed by the cylinder body 4 and the cylinder head 1 in the stator. 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 slipper sleeve 10 is a cylinder with a slide groove on the lower end surface. The outer dimensions of the slipper sleeve 10 are adapted to the dimensions of the swivel sleeve hole 15 on the spherical surface inside the cylinder head 1. The slipper sleeve 10 is placed in the swivel sleeve hole 15 and can rotate around the axis of the swivel sleeve hole 15. The slide groove opening faces downward, and the size of the slide groove is adapted to the slipper 22 on the central protrusion of the spherical surface of the piston 2. The slipper 22 can slide back and forth in the slide groove.

[0047] 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 in 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 in 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.

[0048] 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 the circumference of a circle centered on the axis of the turntable shaft hole 45; 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 slide 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 channel 31 is connected to the second chamber B106, and the other ends of the two turntable air channels 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 increases and needs to be inhaled, the chamber that needs to be inhaled is connected with the second air inlet channel 43 through the turntable air channel 31 connected thereto, and inhales gas through the second air inlet hole 41; when the volume decreases and needs to be exhausted, the chamber that needs to be exhausted is connected with the second exhaust channel 44 through the turntable air channel 31 connected thereto, and discharges high-pressure gas through the second exhaust hole 42.

[0049] Two piston air passages 21 are provided on the piston 2, one end of one piston air passage 21 is communicated with the third chamber A101, and one end of the other piston air passage 21 is communicated with the third chamber B102, and the other ends of the two piston air passages 21 are provided on the piston spherical surface, and a third air intake channel 13 and a third air exhaust channel 14 are provided on the inner spherical surface of the cylinder head 1, and the third air intake channel 13 and the third air exhaust channel 14 are arc grooves distributed on the circumference of a circle with the axis of the rotary sleeve hole 15 as the center; a third air intake hole 11 and a third air exhaust hole 12 are provided on the cylinder head 1, and one end of the third air intake hole 11 is communicated with the third air intake passage One end of the third exhaust hole 12 is connected to the third exhaust channel 14, and the other end is connected to the outside of the cylinder head 1; when the turntable shaft 36 rotates, the volume of the third chamber A101 and the third chamber B102 changes alternately. When the volume becomes larger and needs to inhale, the chamber that needs to inhale is connected to the third intake channel 13 through the piston air channel 21 connected thereto, and inhales gas 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 channel 14 through the piston air channel 21 connected thereto, and exhausts gas through the third exhaust hole 12.

[0050] To prevent compression in the fourth chamber A103 and the fourth chamber B104, thereby preventing work from being performed on the gas and reducing power consumption, a through hole 32 is provided on the turntable pin seat of the turntable 3. The two ends of the through hole 32 connect to the fourth chamber A103 and the fourth chamber B104, respectively, thereby balancing the pressures within the fourth chambers A103 and B104. Alternatively, the cylinder head 1 may be provided with intake and exhaust holes for the fourth chambers A103 and B104, and corresponding intake and exhaust passages may be provided on the inner spherical surface of the cylinder head 1. The fourth chambers A103 and B104 may be used as the working chambers of the compressor or expansion stage, thereby increasing the number of stages in the multi-stage compressor.

[0051] The rolling rotor compression section serves as the first stage of compression, with the first chamber A107 and the first chamber B108, whose volumes alternate, serving as the compression working chambers. The second chamber A105 and the second chamber B106, whose volumes alternate, serve as the compression working chambers of the second stage of compression. The third chamber A101 and the third chamber B102, whose volumes alternate, serve as the compression working chambers or expansion working chambers of the third stage of compression. The first air inlet 705 communicates with the third air outlet 12, the first air outlet 706 communicates with the second air inlet 41, and the second air outlet 42 communicates with 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

1. A multi-stage spherical compressor, characterized by: The cam is provided with a spherical inner cavity, a spherical inner cavity and a spherical inner cavity, and a spherical inner cavity is formed after the cam is fixedly connected. A spherical inner cavity is formed on the inner spherical surface of the cylinder head, and a spherical inner cavity is formed on the lower part 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 provided at the lower end of the piston, and a spherical groove is provided in the lower center of 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 provided at the upper end of the turntable spherical surface, and a spherical protrusion matching the spherical groove is provided 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 two ends of the cylindrical hinge are respectively concave inward to form A cylindrical groove; one end of the side support shown is a flat end face, a center axis hole is provided in the center of the flat end face, and the other end is a spherical surface adapted to the piston and the turntable spherical surface; 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, and the outer circle of the side support is adapted to the inner holes of the cylindrical grooves 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 is provided on the turntable body that passes through the direction of the cylindrical hinge axis, and the shape of the fan-shaped slider is adapted to the shape of the fan-shaped slideway, and 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-shaped groove and the sector-shaped 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 surfaces 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 turntable are placed in the spherical inner cavity, and the piston spherical surface, turntable spherical surface, and 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, 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. 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 provided 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 provided 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 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.

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, and the fourth chamber A and the fourth chamber B serve as the fourth stage compression, forming a four-stage compression or 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 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, and 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 along 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 provided on the rolling rotor cylinder body, the first air inlet hole is connected to the first chamber A to form an 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 provided on the first air inlet hole, and an exhaust valve is provided on the first exhaust hole.

7. The multi-stage spherical compressor according to claim 1, characterized in that: A downward-opening semi-cylindrical hole is provided on the lower end surface of the piston pin seat, and the fan-shaped groove is recessed in the center of the inner circumference of the semi-cylindrical hole and passes through along the axial direction of the semi-cylindrical hole, and is fan-shaped on the 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, and 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 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 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; the fan-shaped protrusion protrudes from the center of the outer circumference of the semi-circular ring body and passes through 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.

8. A multi-stage spherical compressor according to claim 1, characterized in that: The cylinder body is provided with a second air inlet and a second exhaust hole, and a second air inlet channel and a second exhaust channel are provided on the spherical surface of the cylinder body, one end of the second air inlet 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 exhaust hole is connected to the second row channel, and the other end is connected to the outside of the cylinder body; turntable air channels are respectively provided on both sides of the fan-shaped slide of the turntable, one end of one turntable air channel is connected to the second chamber A, and one end of the other turntable air channel is connected to the second chamber B, and the other ends of the two turntable air channels are respectively provided on the spherical surface of the turntable. When the turntable shaft rotates, the volumes of the second chamber A and the second chamber B change alternately. When the volume becomes larger and needs to be inhaled, the chamber that needs to inhale is connected to the second air inlet channel through the turntable air channel connected thereto, and inhales gas through the second air inlet; 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 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 channels are provided on the piston, one end of one piston air channel is connected to the third chamber A, and 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 provided on the inner spherical surface of the cylinder head, and a third intake hole and a third exhaust hole are provided 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 inhale is connected to the third intake channel through the piston air channel connected thereto, 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 to the third exhaust channel through the piston air channel connected thereto, and exhausts gas through the third exhaust hole.

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