CN218207068U - Rotor compressor - Google Patents

Abstract

The application discloses a rotor compressor. Aiming at the problem that the rotor rotates and has eccentric force and unstable exhaust pressure, the following technical scheme is provided and comprises the following steps: a housing; the rotor is rotationally connected inside the shell and divides the inside of the shell into a plurality of air chambers which are not communicated with each other, and the rotor is symmetrical relative to the rotating shaft of the rotor; the sliding sheet is connected to the shell in a sliding mode and divides the air chamber into an air inlet cavity and an air exhaust cavity; the air inlet cavity is provided with an air inlet, the air exhaust cavity is communicated with a buffer cavity, and the buffer cavity is provided with an air exhaust port. The rotor with the symmetrical structure does not generate eccentric force, so that the compressor works more stably and has low noise. The buffer cavity temporarily stores the fast flowing gas, and buffers the flow velocity of the gas, so that the exhaust pressure is stable.

Description

Rotor compressor

Technical Field

The application relates to the technical field of compressors, in particular to a rotor compressor.

Background

The rotor type compressor is a compressor which varies a working volume of a cylinder by rotation of an eccentric cylindrical rotor in the cylinder, thereby achieving suction, compression and discharge of gas.

The existing rotor compressor mainly comprises main parts such as a rolling rotor, a cylinder body, a sliding plate, a compression spring, an eccentric wheel shaft, two end covers of a cylinder and the like. The air cylinder is internally provided with an eccentric wheel shaft with an eccentric wheel, the rolling rotor is arranged on the eccentric wheel shaft, when the air cylinder works, the rotor moves along the inner wall of the air cylinder to form a crescent space with the air cylinder, two ends of the crescent space are sealed by the air cylinder cover, so that a closed working cavity is formed, the end part of the sliding plate is tightly contacted with the rotor by a compression spring, and the crescent space is divided into two parts, namely an air suction cavity and a compression cavity. When the eccentric wheel shaft is driven by the motor to rotate around the center of the cylinder continuously, the volumes of the air suction cavity and the compression cavity change periodically, and the pressure in the volumes also changes periodically, so that the working processes of air suction, compression, exhaust and the like are realized, and the function of the compressor is completed.

In the process of implementing the prior art, the inventor finds that:

on the one hand, the eccentric shaft generates a large eccentric force at high-speed operation. In order to resist the eccentric force, the overall structural strength of the compressor is increased. And the vibration and noise of the compressor are large due to the eccentric motion of the eccentric wheel shaft.

On the other hand, the structure of the conventional rotor compressor in which the exhaust port is straight leads to unstable exhaust pressure, sudden change of air pressure inside the compressor, damage to the compressor, and high noise.

SUMMERY OF THE UTILITY MODEL

To the not enough of prior art existence, the aim at of this application provides a rotor compressor, and the rotor does not have eccentric force, simple structure, and it is stable to exhaust moreover.

In order to achieve the purpose, the application provides the following technical scheme:

a rotary compressor comprising:

a housing;

the rotor is rotationally connected inside the shell and divides the inside of the shell into a plurality of air chambers which are not communicated with each other, and the rotor is symmetrical relative to the rotating shaft of the rotor;

the sliding sheet is connected to the shell in a sliding mode and divides the air chamber into an air inlet cavity and an air exhaust cavity;

the air inlet cavity is provided with an air inlet, the air exhaust cavity is communicated with a buffer cavity, and the buffer cavity is provided with an air exhaust port.

Further, the casing is equipped with the pressure spring, pressure spring one end is supported and is leaned on in shells inner wall, the other end of pressure spring supports and leans on in the gleitbretter, so that the gleitbretter supports and leans on in the rotor.

Further, the rotor is provided with a weight reduction cavity.

Further, a sealing structure is arranged between the shell and the sliding piece, and the sealing structure is arranged on the shell.

Further, the sealing structure is a labyrinth seal.

Further, the cross section of the rotor is elliptical.

Further, the rotor is provided with a central shaft matched with the motor rotating shaft.

Further, an earring is arranged outside the shell.

Further, the housing is provided with a motor support.

Further, the motor support is provided with a support groove.

The application has at least the following beneficial effects:

1. along with the rotation of rotor, the volume of admitting air chamber grow gradually, makes and advances the intracavity and produce the negative pressure to external atmospheric pressure is with gas pressure chamber of admitting air. The volume of the exhaust cavity becomes gradually smaller. The pressure in the exhaust cavity is increased, and the compression of the gas is realized. Compared with an eccentric wheel, the rotor with a symmetrical structure does not generate eccentric force when rotating, so that the compressor works more stably and has low noise.

2. After the compressed gas that flows fast is kept in and is cushioned through the cushion chamber, the gas flow speed reduces, makes the exhaust of compressor stable, avoids the sudden change of the inside atmospheric pressure of compressor, protects the compressor, and the exhaust noise is little moreover.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic structural view of a rotary compressor.

Fig. 2 is a sectional view of the rotary compressor in fig. 1.

Fig. 3 is a schematic view illustrating a clockwise rotation structure of the rotor in fig. 2.

100. Rotor compressor

11. Base seat

12. Pressure spring

13. Sliding vane

14. Buffer cavity

15. Ear ring

16. Rotor

161. Center shaft

162. Weight reduction cavity

17. Shell body

18. Exhaust cavity

19. Air inlet cavity

110. Sliding chamber

111. Grate tooth seal

112. Exhaust port

113. Air inlet

21. Motor support

211. Supporting round hole

212. Supporting groove

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The present application provides a rotary compressor 100, see fig. 1 and 2, comprising:

a housing 17;

the rotor 16 is rotatably connected inside the shell 17 and divides the inside of the shell 17 into a plurality of air chambers which are not communicated with each other, and the rotor 16 is symmetrical relative to the rotating shaft of the rotor 16;

a slide 13 slidably connected to the housing 17 and dividing the air chamber into an air inlet chamber 19 and an air outlet chamber 18;

the air inlet cavity 19 is provided with an air inlet 113, the air outlet cavity 18 is communicated with the buffer cavity 14, and the buffer cavity 14 is provided with an air outlet 112.

In the present application, the housing 17 may specifically take the form of a closed cylinder. The rotor 16 may take the form of a cylinder having an elliptical cross-section in a direction perpendicular to the axis of rotation of the rotor. The rotor 16 is coaxial with the housing 17. The rotor 16 having an elliptical cross section is symmetrical with respect to the rotational axis of the rotor 16. The circular arcs of both ends of the elliptical major diameter of the rotor 16 are in line contact with the inner wall of the housing 17. The elliptical rotor 16 divides the interior of the housing 17 into two crescent shaped air chambers which are not in communication with each other. The two crescent shaped air chambers are symmetrical with respect to the long diameter of the ellipse of the cross section of the rotor 16. The slide 13 is slidably connected to the housing 17, in particular, in the radial direction of the housing 17. The shell 17 is provided with a through groove for sliding the sliding sheet 13.

The slide 13 may be provided in two or four. The plurality of sliding pieces 13 are uniformly distributed in the housing 17 in the circumferential direction of the housing 17, and for example, two sliding pieces 13 are oppositely disposed in the housing 17 on a plane in the radial direction of the housing 17. One ends of the two sliding pieces 13 close to the rotor 16 abut against the surface of the rotor 16, so that the two air chambers are respectively divided into an air inlet chamber 19 and an air outlet chamber 18 by the two sliding pieces 13. The gas enters the gas inlet chamber 19 through the gas inlet 113 to replenish the gas in the housing 17. The gas is discharged through the gas discharge chamber 18 and the buffer chamber 14 in order to discharge the gas in the housing 17.

It will be appreciated that when the rotor 16 rotates clockwise, the end of the sliding vane 13 adjacent to the rotor 16 slides along the surface of the rotor 16, see figure 3. One end of the sliding sheet 13 far away from the rotor 16 slides along the sliding groove of the shell 17, so that the sliding sheet 13 divides an air chamber into an exhaust chamber 18 and an air inlet chamber 19. Along with the rotation of the rotor 16, the volume of the air inlet cavity 19 gradually increases, so that negative pressure is generated in the air inlet cavity 19, and thus, the external atmospheric pressure presses air into the air inlet cavity 19 to finish air suction. The volume of the exhaust chamber 18 becomes gradually smaller. The pressure in the exhaust chamber 18 increases and compression of the gas is achieved. For a compressor with two sliding vanes 13, the rotor 16 completes the exhaust process twice per revolution.

When the rotor 16 with an oval cross section rotates to the two ends with the long diameter to contact with the two sliding vanes 13, that is, when the two sliding vanes 13 are located on the same plane with the oval long diameter, the exhaust port 112 communicates with the intake port 113. In this case, both the gas chambers are not closed, and therefore, the compression medium of the rotary compressor 100 may be gas or liquid. When the compression medium is liquid, the compression medium plays a role in lubricating between the rotor 16, the inner wall of the shell 17 and the sliding sheet 13, so that friction is reduced, and the device is protected.

Compared with the rotor with an eccentric structure, the rotor 16 with a symmetrical structure has no eccentric force when rotating, so that the compressor works more stably and has low noise. Compared with an eccentric rotor, the structure of balancing eccentric force is not needed, the structure is simple, and the manufacturing cost is low.

The buffer chamber 14 has the function of stabilizing and regulating voltage. After the compressed gas is buffered by the buffer cavity 14, the gas flow speed is reduced, so that the exhaust of the compressor is stable, the sudden change of the gas pressure in the compressor is avoided, the compressor is protected, and the exhaust noise is low. In addition, a pressure maintaining valve does not need to be arranged at the exhaust port 112, the structure is simple, and the manufacturing cost is reduced.

Further, referring to fig. 2, the housing 17 is provided with a pressure spring 12, one end of the pressure spring 12 abuts against the inner wall of the housing 17, and the other end of the pressure spring 12 abuts against the sliding piece 13, so that the sliding piece 13 abuts against the rotor 16.

In the present application, the compression spring 12 is a compression coil spring. Specifically, the housing 17 is provided with a sliding chamber 110 along a radial plane of the housing 17 for sliding the sliding piece 13. The slide chamber 110 is provided in plural numbers in association with the plural sliders 13. The pressure spring 12 is specifically provided in the slide chamber 110 of the housing 17. One end of the compression spring 12 and one end of the slide sheet 13 far away from the rotor 16 abut against each other. The other end of the pressure spring 12 abuts against the inner wall of the sliding chamber 110. The pressure spring 12 is compressed.

It will be appreciated that the compression spring 12, on the one hand, resiliently presses the slide 13 tightly against the rotor 16 to effect a seal between the discharge chamber 18 and the inlet chamber 19 to improve the efficiency of gas compression. On the other hand, because the pressure spring 12 has elasticity, the abrasion between the sliding sheet 13 and the rotor 16 is reduced, and the service life is prolonged.

Further, referring to fig. 2, the rotor 16 is provided with a weight-reducing cavity 162.

In the present application, the cross-section of the rotor 16 with the weight-reducing cavity 162 may be specifically a plurality of hollow symmetrical shapes symmetrical with respect to the rotation axis, for example, two semicircular hollowed-out ellipses symmetrical with respect to the rotation axis.

It can be appreciated that the weight reduction cavity 162 reduces the weight of the rotor 16, reduces the inertia of the rotor 16, enables the rotor 16 to be started and stopped quickly, and facilitates direct drive of the motor. In addition, structures such as a coupler and the like are omitted, the structure is simple, and the manufacturing cost is reduced.

Further, referring to fig. 2 and 3, a sealing structure is provided between the housing 17 and the sliding piece 13, and the sealing structure is provided on the housing 17.

In the present application, the sliding chamber 110 of the housing 17 is provided with a through slot for the sliding blade 13 to slide. The sealing structure is specifically provided to the groove side of the through groove of the sliding chamber 110. The sealing structure can adopt a labyrinth seal, an O-shaped ring seal or a lip-shaped ring seal.

It is understood that during the sliding of the sliding sheet 13 in the through slot of the sliding chamber 110, gas flows between the air chamber and the sliding chamber 110 along with the sliding sheet 13. The sealing structure seals a gap between the sliding sheet 13 and the sliding chamber 110, prevents gas from flowing between the sliding chamber 110 and the gas chamber, and improves the compression efficiency of the compressor.

Further, referring to fig. 3, the sealing structure is a labyrinth seal 111.

It will be appreciated that one side of the labyrinth seal 111 has a plurality of tooth-like projections. The tooth top end of the grate tooth is contacted with the slide sheet 13. One side of the tooth root of the grate tooth is fixedly connected with the groove side surface of the through groove of the sliding chamber 110. On the other hand, the labyrinth seal 111 utilizes a smaller contact area between the tooth tip and the vane 13, and has a smaller contact area and a smaller frictional force than other seal systems, so that the vane 13 smoothly slides in the slide chamber 110. On the other hand, the plurality of tooth tips of the labyrinth seal 111 block the gas flow between the slip chamber 110 and the gas chamber, thereby improving the gas compression efficiency of the compressor.

Further, referring to fig. 2, the rotor 16 is elliptical in cross-section.

It will be appreciated that the cross-section of the rotor 16 taken perpendicular to the axis of rotation is elliptical. The elliptical arcs of both ends of the long diameter of the rotor 16 are in line contact with the inner wall of the housing 17. Compared with the rotor 16 with other shapes, the contact line of the arc of the ellipse and the inner wall of the shell 17 can ensure the sealing performance between each air chamber and reduce the friction force between the rotor 16 and the shell 17.

Further, referring to fig. 1 and 2, the rotor 16 is provided with a central shaft 161 that matches the motor shaft.

In the present application, specifically, the end surface of the rotor 16 is fixedly provided with a cylindrical center shaft 161. The central shaft 161 is disposed coaxially with the rotor 16. The central shaft 161 and the rotating shaft of the motor may be connected by a coupling or a bolt.

It can be understood that the central shaft 161 provides a mounting location for the connection between the motor and the compressor, which facilitates the rotation of the motor shaft to drive the rotor 16, so that the connection between the motor shaft and the rotor 16 is more reliable, and the practicability of the device is improved.

Further, referring to fig. 2, the housing 17 is externally provided with an ear ring 15.

In the present application, the earrings 15 may be provided in two, and are all provided on one side of the plane of the two coplanar sliding pieces 13. The ear ring 15 is fixedly arranged on the outer side of the housing 17. The middle part of the ear ring 15 is provided with a through hole for installation.

It will be appreciated that, on the one hand, the compressor is heavy and difficult to assemble. The installation of the compressor can be assisted by adopting a hoisting mode. The hoisting rope passes through the through hole of the earring 15 to help hoisting the compressor, so that the compressor is more convenient to assemble. On the other hand, the compressor has large vibration during use, and the earring 15 can be fixed by using a bolt, so that the compressor can be fixed to reduce the vibration of the compressor.

Further, referring to fig. 1 and 2, the housing 17 is provided with a motor support 21.

In the present application, specifically, the housing 17 is fixedly provided with the base 11. The base 11 is disposed on a side of the sliding piece 13 away from the ear ring 15. The motor support 21 is fixed to the base 11 by bolts, and the motor support 21 and the housing 17 are fixed to each other. The motor support 21 is provided with a support circular hole 211 through which the motor rotation shaft passes. The support circular hole 211 of the motor support 21 is coaxial with the rotor 16. The motor shaft is rotatably connected to the motor support 21 through a rolling bearing. On the one hand, the motor rotating shaft is supported, so that the rotation of the motor rotating shaft is more stable. On the other hand, the concentricity between the motor rotating shaft and the rotor 16 is ensured, and the motor rotating shaft and the rotor 16 of the compressor are protected.

Further, referring to fig. 1, the motor support 21 is provided with a support groove 212.

In this application, the housing of the motor is fixed to the support groove 212 of the motor support 21 by bolts. The supporting groove 212 facilitates the installation of the motor housing on the motor support 21, realizes the fixation between the motor and the compressor, enables the motor to drive the compressor more stably, and increases the practicability of the device.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the present application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (10)

1. A rotary compressor, comprising:

a housing;

the rotor is rotationally connected inside the shell and divides the inside of the shell into a plurality of air chambers which are not communicated with each other, and the rotor is symmetrical relative to the rotating shaft of the rotor;

the sliding sheet is connected to the shell in a sliding mode and divides the air chamber into an air inlet cavity and an air exhaust cavity;

the air inlet cavity is provided with an air inlet, the air exhaust cavity is communicated with a buffer cavity, and the buffer cavity is provided with an air exhaust port.

2. The rotor compressor of claim 1, wherein the housing is provided with a pressure spring, one end of the pressure spring abuts against an inner wall of the housing, and the other end of the pressure spring abuts against the sliding vane, so that the sliding vane abuts against the rotor.

3. The rotary compressor of claim 1, wherein the rotor is provided with a weight-reducing cavity.

4. The rotary compressor as recited in claim 1, wherein a sealing structure is provided between the housing and the vane, the sealing structure being provided to the housing.

5. The rotary compressor of claim 4, wherein the seal structure is a labyrinth seal.

6. The rotary compressor of claim 1, wherein the cross-section of the rotor is elliptical.

7. The rotary compressor of claim 1, wherein the rotor is provided with a central shaft fitted to a rotating shaft of the motor.

8. The rotary compressor of claim 1, wherein the housing is externally provided with an ear ring.

9. The rotary compressor of claim 1, wherein the housing is provided with a motor support.

10. The rotary compressor of claim 9, wherein the motor support is provided with a support groove.

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