CN211623711U - Swing rotor type expansion compressor - Google Patents

Abstract

The utility model provides a swing rotor formula inflation compressor, including the casing, expansion cylinder, compression cylinder and motor have set gradually in the casing from bottom to top, are provided with the inflation eccentric wheel in the expansion cylinder, are provided with the compression eccentric wheel in the compression cylinder, and inflation eccentric wheel, compression eccentric wheel and motor all set up the main shaft fixed connection in the casing with the axial. The utility model recovers the expansion work in the throttling process and reduces the loss of cooling capacity; and the friction loss, the motion impact, the vibration and the noise caused by mechanical moving parts are also reduced.

Description

Swing rotor type expansion compressor

Technical Field

The utility model belongs to the technical field of the heat pump, more specifically relates to a swing rotor formula expansion compressor.

Background

In the refrigerating and heating pump system, the supercritical carbon dioxide working medium can realize no pollution to the environment, and has good chemical stability and safety and high refrigerating capacity of the working medium in unit volume. The supercritical working medium is generally in a supercritical state when entering the throttling element, and finally becomes a gas-liquid two-phase state through expansion in the throttling valve. However, there is a large energy loss in the throttle valve using the capillary tube or the throttle stub, resulting in a low cycle efficiency, and thus, the expansion valve is often used instead of the throttle valve. However, how to utilize the recovered expansion work is an urgent problem to be solved. In addition, the clearance volume loss of the inlet control system of the existing expansion machine is large, and the loss caused by the high-pressure fluid reserved in the air suction pipeline accounts for more than 50% of the total loss of the clearance volume; meanwhile, the problems of friction loss between a moving part cam of the inlet control system and the slide valve, short service life of a rolling bearing on the slide valve and the like are also to be solved.

Therefore, there is a need in the art for a solution that can effectively recover the expansion work of the expander, reduce the clearance volume loss, and reduce the mechanical friction loss and noise.

SUMMERY OF THE UTILITY MODEL

To the not enough of above-mentioned prior art, the utility model provides a can effectively retrieve the work of expansion to persist high-pressure fluid in the expander, reduce clearance volume loss, and need not control with the valve, reduced a swing rotor formula expansion compressor of mechanical friction loss and noise.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:

a swing rotor type expansion compressor comprises a shell, wherein an expansion cylinder, a compression cylinder and a motor are sequentially arranged in the shell from bottom to top, an expansion eccentric wheel is arranged in the expansion cylinder, a compression eccentric wheel is arranged in the compression cylinder, and the expansion eccentric wheel, the compression eccentric wheel and the motor are all fixedly connected with a main shaft axially arranged in the shell;

the outer wall of the expansion eccentric wheel is sleeved with a swing rod, the swing rod comprises a ring part and a rod part which are integrally formed, the outer wall of the ring part of the swing rod is tangent to the inner wall of the expansion cylinder, the inner wall of the ring part of the swing rod is arranged in a manner of being attached to the outer wall of the expansion eccentric wheel, an expansion air inlet hole is formed in the side wall of the ring part of the swing rod, a guide rail is arranged on the outer wall of the expansion cylinder, the rod part of the swing rod penetrates through the guide rail, a groove is formed in the edge of the;

an expansion partition plate is arranged above the expansion eccentric wheel, an expansion air inlet pipe radially penetrates through the expansion partition plate, the expansion air inlet pipe and one end of a U-shaped hole formed in the side wall of the main shaft are on the same horizontal line, the other end of the U-shaped hole is communicated with a through hole radially formed in the groove, and an expansion exhaust pipe is arranged on the outer wall of the expansion cylinder;

a sliding sheet is inserted into the compression cylinder, one end of the sliding sheet tightly presses the outer wall of the compression eccentric wheel, the outer wall of the compression eccentric wheel is tangent to the inner wall of the compression cylinder, the other end of the sliding sheet penetrates through the shell and is sleeved with a spring, and the spring is fixedly connected with the shell;

the compression eccentric wheel below is provided with the compression baffle, compression intake pipe and compression blast pipe have been seted up to the compression cylinder outer wall, the one end of compression blast pipe through the L shape hole in the compression baffle with the cavity of compression cylinder is linked together.

The expansion eccentric wheel and the compression eccentric wheel are arranged in a phase difference of 30 degrees.

The shell is a cylinder.

Compared with the prior art, the utility model beneficial effect be: an expansion compressor is designed, an expansion cylinder and an eccentric wheel of a compression cylinder are fixedly connected into a whole by a main shaft, in the expansion compressor, a high-pressure working medium is expanded in the expansion cylinder, and a low-pressure working medium is compressed in the compression cylinder, so that expansion work in a throttling process can be recovered, and cold loss is reduced; the swing rod in the expansion cylinder controls the carbon dioxide to be sucked into the exhaust cavity in the rotating process, so that high-pressure fluid can be prevented from being reserved, the clearance volume loss is reduced, and the lubrication of parts in the expansion cylinder is facilitated; the expansion compressor is designed to intermittently intake air, mechanical control of valves is cancelled, and friction loss, motion impact, vibration and noise caused by mechanical moving parts are reduced.

Drawings

Fig. 1 is a schematic view of the structure of the present invention.

3 fig. 3 2 3 is 3 a 3 sectional 3 view 3 of 3 section 3 a 3- 3 a 3 in 3 fig. 3 1 3. 3

Fig. 3 is a sectional view of section B-B in fig. 1.

Reference numerals: 1-compression eccentric wheel, 2-compression exhaust pipe, 3-expansion air inlet pipe, 4-expansion air inlet pipe, 5-main shaft, 6-expansion eccentric wheel, 7-expansion exhaust pipe, 8-swing rod, 9-compression air inlet pipe, 10-guide rail, 11-groove, 12-sliding sheet, 13-motor, 14-spring, 15-shell, 16-ring part of swing rod, 17-expansion cylinder, 18-compression cylinder, 19-expansion partition plate, 20-compression partition plate, 21-through hole and 22-U-shaped hole.

Detailed Description

An expansion compressor with swinging rotor as shown in fig. 1-3 comprises a housing 15, an expansion cylinder 17, a compression cylinder 18 and a motor 13 are sequentially arranged in the housing 15 from bottom to top, an expansion eccentric wheel 6 is arranged in the expansion cylinder 17, a compression eccentric wheel 1 is arranged in the compression cylinder 18, the expansion eccentric wheel 6, the compression eccentric wheel 1 and the motor 13 are all fixedly connected with a main shaft 5 axially arranged in the housing, in the embodiment, the housing 15 is a cylinder, the main shaft 5 is axially parallel to the housing 15, the main shaft 5 penetrates through the expansion eccentric wheel 6 and the compression eccentric wheel 1, the motor 13 is fixedly arranged in the housing 15 and is used for driving the main shaft 5 to rotate, and as the expansion eccentric wheel 6 and the compression eccentric wheel 1 are both integrally arranged with the main shaft 5, when the main shaft 5 rotates, the expansion eccentric wheel 6 and the compression eccentric wheel 1 both rotate.

6 outer wall covers of inflation eccentric wheel are equipped with pendulum rod 8, pendulum rod 8 includes integrated into one piece's ring portion and pole portion, and the ring portion outer wall of pendulum rod 8 is tangent with expansion cylinder 17's inner wall, and the inner wall of the ring portion of pendulum rod 8 is hugged closely the setting with 6 outer walls of inflation eccentric wheel, has seted up inflation inlet port 4 on the lateral wall of the ring portion of pendulum rod 8, is provided with guide rail 10 on expansion cylinder 17's the outer wall, and guide rail 10 is run through to the pole portion of pendulum rod 8, and recess 11 has been seted up at the edge of inflation eccentric.

As the motor 13 drives the main shaft 5 to rotate, the expansion eccentric wheel 6 rotates on the inner wall of the ring part of the swing rod 8, the ring part of the swing rod 8 eccentrically rotates in the expansion cylinder 17, and the rod part of the swing rod 8 and the ring part are integrally formed, so that the rod part of the swing rod 8 always penetrates through the guide rail 10 and reciprocates in the guide rail 10 in the rotating process of the expansion eccentric wheel 6, and the spherical guide rail 10 is in close contact with the inner side surface of the base to periodically perform pendulum motion in the base. In this embodiment, a cavity is formed in the outer wall of the expansion cylinder 17, a pair of bases is embedded in the cavity and is fixedly connected with the edge of the cavity in the outer wall of the expansion cylinder 17, the opposite inner side surfaces of the pair of bases are hemispherical surfaces, the guide rail 10 is spherical with a hole at the center, the swing rod 8 penetrates through the hole and can reciprocate in the hole, and the outer surface of the spherical guide rail 10 is matched with the hemispherical surface of the base, so that the spherical guide rail 10 can rotate in the base in a manner of being tightly attached to the hemispherical surface of the base.

Expansion eccentric wheel 6 top is provided with expansion partition 19, radial run-through is provided with expansion intake pipe 3 in the expansion partition 19, expansion intake pipe 3 buries underground in expansion partition 19 promptly, casing 15 is stretched out to one end, the other end and the contact of main shaft 5, U-shaped hole 22 has been seted up on the main shaft 5, two end holes in U-shaped hole 22 all open the lateral wall at main shaft 5, the bottom in two end holes is at the inside intercommunication of main shaft, thereby constitute U-shaped hole 22, one of them end hole and the terminal level of expansion intake pipe 3, expansion intake pipe 3 promptly and the one end that sets up in the U-shaped hole 22 of main shaft 5 lateral wall are on same water flat line. In the process of rapidly rotating the main shaft 5, one end of the U-shaped hole 22 is communicated with the expansion air inlet pipe 3 once per rotation; the other end of the U-shaped hole 22 is communicated with a through hole 21 which is arranged in the groove 11 along the radial direction, and the outer wall of the expansion cylinder 17 is provided with an expansion exhaust pipe 7. The expansion exhaust pipe 7 is close to the rod part of the swing rod 8, and is respectively positioned at two sides of the rod part of the swing rod 8 together with the expansion air inlet hole 4.

Because main shaft 5 and expansion eccentric wheel 6 fixed connection, consequently, along with the rotation of main shaft 5, expansion eccentric wheel 6 synchronous revolution, U-shaped hole 22 remains the intercommunication throughout with the through-hole 21 in the recess 11, and, when recess 11 rotated the position that is linked together with inflation inlet port 4, just can pass through-hole 21 again through U-shaped hole 22 from the working medium that inflation intake pipe 3 got into, gets into expansion cylinder 17 from inflation inlet port 4 at last to realize the intermittent type and admit air. As shown in figure 2, when the main shaft 5 rotates clockwise, the expansion eccentric wheel 6 rotates synchronously, and the outer wall of the ring part of the swing rod 8 clings to the inner wall of the expansion cylinder 17 to move clockwise. Because the expansion exhaust pipe 7 and the expansion air inlet hole 4 are respectively positioned at two sides of the rod part of the swing rod 8, in each circle of clockwise rotation of the swing rod 8, the swing rod 8 firstly separates the working medium which just enters the expansion air cylinder 17 from the expansion exhaust pipe 7, the working medium expands in a closed space which is formed by the swing rod 8 and the expansion air cylinder 17 in an enclosing mode, meanwhile, the closed space is continuously enlarged until the swing rod 8 rotates to expose the expansion exhaust pipe 7, the closed space is changed into an open space, the expanded working medium is discharged out of the expansion air cylinder 17 through the expansion exhaust pipe 7, then the swing rod 8 enters the next circle of rotation, and the process is repeated. The expansion exhaust pipe 7 is close to the rod part of the swing rod 8, so that high-pressure fluid can be prevented from being reserved, the clearance volume loss is reduced, and the lubrication of internal parts of the expansion cylinder is facilitated.

The compression cylinder 18 is inserted with a sliding sheet 12, one end of the sliding sheet 12 compresses the outer wall of the compression eccentric wheel 1, the outer wall of the compression eccentric wheel 1 is tangent to the inner wall of the compression cylinder 18, the other end of the sliding sheet 12 penetrates out of the shell 15 and is sleeved with a spring 14, and the spring 14 is fixedly connected with the shell 15, so that the sliding sheet 12 can be constrained by the spring 14 when moving in the direction out of the compression cylinder 18.

Because the main shaft 5 is fixedly connected with the compression eccentric wheel 1, the compression eccentric wheel 1 synchronously rotates along with the rotation of the main shaft 5, the sliding sheet 12 reciprocates along the radial direction of the compression cylinder 18 while the compression eccentric wheel 1 rotates along with the main shaft 5, and when the compression eccentric wheel 1 pushes the sliding sheet 12 to the direction outside the compression cylinder 18, the spring 14 can give a restraining force to the sliding sheet 12 in the opposite direction to prevent the sliding sheet 12 from flying out of the cylinder; when the sliding sheet 12 moves towards the compression cylinder 18, the restraining force of the spring 14 on the sliding sheet 12 is reduced, one end of the sliding sheet 12 close to the eccentric wheel is abutted against the compression eccentric wheel 1 until the compression eccentric wheel 1 enters the next circle of rotation, so that the sliding sheet 12 performs the reciprocating motion repeatedly.

A compression partition plate 20 is arranged below the compression eccentric wheel 1, a compression exhaust pipe 2 and a compression intake pipe 9 are further arranged on the outer wall of the compression cylinder 18, and the compression exhaust pipe 2 penetrates through the shell 15 and is inserted into the transverse part of the L-shaped hole in the compression partition plate 20. The compression exhaust pipe 2 and the compression intake pipe 9 are respectively located on two sides of the sliding sheet 12, and are closer to the sliding sheet 12. As shown in fig. 3, the working medium enters the compression cylinder 18 through the compression air inlet pipe 9, and in each rotation of the compression eccentric wheel 1, the working medium is compressed first until the compression eccentric wheel 1 rotates to the position where the end of the L-shaped hole is exposed, and the compressed working medium enters the L-shaped hole and then enters the compression air inlet pipe 2 to be discharged out of the expansion compressor.

The position of the expansion eccentric 6 and the compression eccentric 1 are out of phase, in the present embodiment the expansion eccentric 6 and the compression eccentric 1 are arranged out of phase by 30 °.

The working process of the utility model is as follows.

Connecting the swing rotor type expansion compressor to a refrigeration heat pump system, enabling a high-pressure working medium discharged by a gas cooler to enter an expansion air inlet pipe 3, enabling the working medium to enter a U-shaped hole 22 when a main shaft 5 rotates to one end of the U-shaped hole 22 to be aligned with the expansion air inlet pipe 3, enabling the working medium to enter a groove 11 through a through hole 21, enabling the working medium to enter an expansion cylinder 17 from the entering groove 11 when the groove 11 rotates to a position communicated with an expansion air inlet hole 4, achieving intermittent air inlet, enabling the expanded working medium to be discharged out of the expansion compressor from an expansion exhaust pipe 7, and continuously circulating in the refrigeration heat pump system; meanwhile, a low-pressure working medium flowing out of the evaporator enters the compression cylinder 18 through the compression air inlet pipe 9, the compression eccentric wheel 1 and the expansion eccentric wheel 6 rotate synchronously, the working medium entering the compression cylinder 18 is compressed, and when the main shaft 5 rotates to expose the end part of the L-shaped hole, the compressed working medium enters the compression exhaust pipe 2 through the L-shaped hole and is finally discharged out of the expansion compressor. And the circulation is continued in the refrigeration heat pump system, and the expansion work in the expansion process is recycled for compression, so that the work consumed by the refrigeration heat pump system is saved.

The expansion cylinder of the expansion compressor is designed to intermittently intake air, the compression cylinder is designed to intermittently exhaust air, valves such as an air intake valve and the like are not needed to be mechanically controlled, energy loss and mechanical abrasion caused by friction, motion impact and vibration of mechanical moving parts are reduced, and noise is also reduced.

The above description is only the preferred embodiment of the present invention, but the present invention is not limited to the above-mentioned specific embodiments, and for those skilled in the art, a plurality of modifications and improvements can be made without departing from the inventive concept of the present invention, and these modifications and improvements all belong to the protection scope of the present invention.

Claims (3)

1. A swing rotor type expansion compressor comprises a shell (15) and is characterized in that an expansion cylinder (17), a compression cylinder (18) and a motor (13) are sequentially arranged in the shell (15) from bottom to top, an expansion eccentric wheel (6) is arranged in the expansion cylinder (17), a compression eccentric wheel (1) is arranged in the compression cylinder (18), and the expansion eccentric wheel (6), the compression eccentric wheel (1) and the motor (13) are all fixedly connected with a main shaft (5) axially arranged in the shell;

the outer wall of the expansion eccentric wheel (6) is sleeved with a swing rod (8), the swing rod (8) comprises a ring part and a rod part which are integrally formed, the outer wall of the ring part of the swing rod (8) is tangent to the inner wall of the expansion cylinder (17), the inner wall of the ring part of the swing rod (8) is arranged in a manner of being tightly attached to the outer wall of the expansion eccentric wheel (6), an expansion air inlet hole (4) is formed in the side wall of the ring part of the swing rod (8), a guide rail (10) is arranged on the outer wall of the expansion cylinder (17), the rod part of the swing rod (8) penetrates through the guide rail (10), a groove (11) is formed in the edge of the expansion eccentric wheel (6), and a through;

an expansion partition plate (19) is arranged above the expansion eccentric wheel (6), an expansion air inlet pipe (3) radially penetrates through the expansion partition plate (19), the expansion air inlet pipe (3) and one end of a U-shaped hole (22) formed in the side wall of the main shaft (5) are on the same horizontal line, the other end of the U-shaped hole (22) is communicated with a through hole (21) formed in the groove (11) in the radial direction, and an expansion exhaust pipe (7) is arranged on the outer wall of the expansion cylinder (17);

a sliding sheet (12) is inserted into the compression cylinder (18), one end of the sliding sheet (12) presses the outer wall of the compression eccentric wheel (1), the outer wall of the compression eccentric wheel (1) is tangent to the inner wall of the compression cylinder (18), the other end of the sliding sheet (12) penetrates through the outer wall of the compression cylinder (18) and is sleeved with a spring (14), and the spring (14) is fixedly connected with the shell (15);

the compression eccentric wheel (1) below is provided with compression baffle (20), compression blast pipe (2) and compression intake pipe (9) have still been seted up to compression cylinder (18) outer wall, the one end of compression blast pipe (2) through the L shape hole in compression baffle (20) with the cavity of compression cylinder (18) is linked together.

2. -oscillating rotor expansion compressor according to claim 1, characterised in that the expansion eccentric (6) and the compression eccentric (1) are arranged with a phase difference of 30 °.

3. -oscillating rotor expansion compressor according to claim 1, characterised in that the shell (15) is cylindrical.

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