Rotary gas compression or expansion device

Abstract

The utility model discloses a rotary gas compression or expansion device, which comprises a cylinder body, a rotor and a rotating shaft linked with the rotor, the rotor with a circular cross section is pivoted in the cylinder body through the rotating shaft, a working space is formed between the circumferential surface of the rotor and the inner wall of the cylinder body, and the rotating shaft and the rotor are eccentrically distributed. The central axis of the rotating shaft is parallel to but not overlapped with the central axis of the rotor; the cross section of the inner cavity of the cylinder body is circular, and the radius R corresponds to the farthest distance from the circle center of the rotating shaft to the circumferential surface of the rotor; a sliding tongue plate penetrates through the side wall of the cylinder body from outside to inside and then elastically abuts against the circumferential face of the rotor, and an air inlet and an air outlet which are communicated with the working space are formed in the two sides, located at the position where the sliding tongue plate penetrates, of the cylinder body respectively. According to the structure, the sliding tongue plate is arranged outside the cylinder body and elastically abuts against the circumferential face of the rotor, good sealing is formed between the rotor and the sliding tongue plate by applying proper elastic force, the structure is simple, and the machining cost is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas compression or expansion equipment technical field, especially a kind of rotary gas compression or expansion device. BACKGROUND

[0002] The working principle of air compressor and gas expander is corresponding, air compressor is compressed by external mechanical energy power work to gas;Expander is outputted mechanical work to outside by compressed gas expansion decompression.For air compressor, the existing air compressor mainly includes the following several kinds: piston reciprocating air compressor, screw air compressor, centrifugal air compressor.

[0003] In addition, for the existing sliding vane pump product, it is composed of pump body, rotor, stator (cylinder) and sliding vane. Its working principle is to make the sliding vane close to eccentric stator by centrifugal force, the cavity between two sliding vanes at inlet increases, liquid is absorbed, the cavity between two sliding vanes at outlet decreases, liquid is discharged. The inventor has proposed a "single sliding vane rotary compressor" combined with the design principle of sliding vane pump product, see patent application number: 202411130178.8 Chinese invention patent application, its adopted technical scheme is: the single sliding vane rotary compressor includes: cylinder and rotor, the rotor with circular cross section is pivoted in the cylinder, the rotor circumferential surface and the inner wall of cylinder form working space, a sliding vane is slidably installed on the rotor, the sliding vane rotates with the rotor, and the first end and the second end of the sliding vane pass through the center of the rotor, and the first end and the second end of the sliding vane are simultaneously attached to the inner wall of the cylinder;The rotor circumferential surface and the inner wall of cylinder have an inscribed contact part P;The inlet and outlet are respectively arranged at the position close to the contact part P of the cylinder. The sliding of working sliding vane changes the size of working space, so as to realize the compression of gas.

[0004] On the basis of previous research, the inventor improves the following technical scheme again. UTILITY MODEL CONTENT

[0005] The utility model solves the technical problems of improving prior art and proposes a kind of rotary gas compression or expansion device.

[0006] In order to solve the above technical problems, the utility model adopts the following technical scheme: a rotary gas compression or expansion device, comprising: a cylinder, a rotor, a rotating shaft connected with the rotor, the rotor with a circular cross section is pivoted in the cylinder through the rotating shaft, a working space is formed between the rotor circumferential surface and the inner wall of the cylinder, the rotating shaft and the rotor are eccentrically distributed, that is, the central axis of the rotating shaft is parallel to but not coincident with the central axis of the rotor, the cross section of the inner cavity of the cylinder is circular, the radius thereof corresponds to the farthest distance from the center of the rotating shaft to the rotor circumferential surface, a sliding tongue plate passes through the side wall of the cylinder from outside to inside and is elastically abutted on the rotor circumferential surface, and an air inlet and an air outlet are arranged on both sides of the sliding tongue plate passing position on the cylinder and are communicated with the inner cavity of the cylinder.

[0007] Further, in the above technical scheme, the rotor circumferential surface has a joint with the inner wall of the cylinder, which is located at the position on the rotor circumferential surface farthest from the center of the rotating shaft.

[0008] Further, in the above technical scheme, a rotor sealing strip is arranged at the joint of the rotor.

[0009] Further, in the above technical scheme, when the utility model is used as a gas expansion device, an electric control valve is arranged at the air inlet to control the air intake amount; when the utility model is used as a gas compression device, a check air outlet valve is arranged at the air outlet.

[0010] Further, in the above technical scheme, the cylinder comprises a cylindrical body and cylinder end covers fixed on the upper and lower ends of the body, and a sealing ring is arranged on the upper and lower end faces of the rotor to form an end face seal with the cylinder end covers.

[0011] Further, in the above technical scheme, the end of the sliding tongue plate in contact with the rotor circumferential surface is provided with a sliding tongue sealing strip.

[0012] Further, in the above technical scheme, one side of the sliding tongue plate in contact with the rotor circumferential surface is formed with a pivoting strip, and a groove is formed in the sliding tongue sealing strip to cooperate with the pivoting strip, so that the sliding tongue sealing strip can be swingably connected to the end of the sliding tongue plate through the nested cooperation between the groove and the pivoting strip.

[0013] Further, in the above technical scheme, the sliding tongue plate is installed on a base fixed relative to the cylinder, the base is provided with a sliding groove for accommodating the sliding tongue plate and an elastic member for driving the sliding tongue plate to move towards the rotor, and the sliding tongue plate is elastically abutted on the rotor circumferential surface after passing through the side wall of the cylinder from outside to inside under the driving of the elastic member.

[0014] Further, in the above technical scheme, a planar linear bearing is arranged between the sliding tongue plate and the sliding groove, and the elastic member is a spring.

[0015] Further, in the technical scheme, the base is integrally formed with the cylinder body.

[0016] After the technical scheme is used, the utility model has the following beneficial effects compared with the prior art:

[0017] 1. The utility model discloses simple structure, few parts, easy processing and manufacturing, and is suitable for small -size, micro -size compressor or expansion power machine, and the comprehensive cost is low.

[0018] 2. The utility model discloses setting the slide tongue plate at the outside of the cylinder body, and the slide tongue plate is elastically pressed on the circumferential surface of the rotor, and through the proper elastic force, the rotor and the slide tongue plate form the good sealing, and the simple structure, the processing cost is lower.

[0019] 3. The utility model discloses good sealing effect, and sets up the sealing strip between the combination of the rotor and the inner wall of the cylinder, and the sealing strip is always contacted with the inner wall of the cylinder in the rotor rotation process, and forms the good sealing effect, and simultaneously, the slide tongue plate's end sets up the elastic abutment on the circumferential surface of the rotor 2, and realizes the good sealing through the slide tongue sealing strip of setting in the slide tongue plate end.

[0020] 4. The utility model discloses not only can be used for gas compression device, also can reverse as gas expansion device, is used as expansion device, and the air inlet passes through the electronic injection valve quantitative control proper volume's high pressure working medium gas, and fills into the cylinder and promotes the rotor rotation, and after the full expansion, exhausts the spent gas, and can obtain the larger expansion ratio, i.e. the higher work conversion efficiency. DRAWINGS:

[0021] Figure 1 It is the structural principle drawing of the utility model;

[0022] Figures 2 to 7 It is the working principle drawing of the utility model. CONCRETE IMPLEMENTATION:

[0023] The utility model is further explained in connection with specific embodiment and drawing.

[0024] The utility model discloses a rotary gas compression or expansion device. Figure 1 As shown in the figure, the utility model discloses a rotary gas compression or expansion device.

[0025] The cylinder 1 includes a cylindrical body and cylinder end covers fixed on the upper and lower ends of the body by fasteners such as bolts; the cylinder 1 seals the working space 10 through the upper and lower cylinder end covers. To maintain the seal, a sealing ring is provided on the upper and lower end faces of the cylinder 1 and the rotor 2 to form an end face seal with the cylinder end cover.

[0026] The material of the cylinder 1 can be nodular cast iron, carbon steel, wear-resistant stainless steel, etc. To improve wear resistance, the inner wall of the cylinder 1 can be coated with a wear-resistant coating or plated layer. For example: babbitt alloy, or silicon nitride, aluminum oxide, zirconium oxide, silicon carbide, etc.

[0027] The rotor 2 has a circular cross-section and is pivotally connected to the cylinder 1 by a shaft 4. The material of the rotor 2 can be nodular cast iron, carbon steel, stainless steel, etc. A rotor edge sealing ring is designed at the edge of the end face of the rotor 2 to achieve end face sealing.

[0028] The shaft 4 is concentrically distributed with the cylinder 1, and the shaft 4 is eccentrically distributed with the rotor 2. That is, the central axis of the shaft 4 coincides with the central axis of the circular inner cavity of the cylinder 1, and at the same time, the rotor 2 is parallel to but not coincident with the central axis of the shaft 4. In this way, during the rotation of the rotor 2 and the shaft 4, the position of the slide tongue plate 3 relative to the cylinder 1 does not change, and the position of the working space 10 between the circumferential surface of the rotor 2 and the inner wall of the cylinder 1 also changes. The volume of the two regions separated by the slide tongue plate 3 in the working space 10 changes reciprocally, and this change can be used to achieve gas compression or expansion work.

[0029] The inner cavity of the cylinder 1 has a circular cross-section, forming a circular cavity with a radius corresponding to the farthest distance from the center of the shaft 4 to the circumferential surface of the rotor 2. The rotor 2 also has a circular cross-section, and its circumferential surface has an inner tangent junction 20 with the inner wall of the cylinder 1, which is located at the position on the circumferential surface of the rotor 2 that is farthest from the center of the shaft 4. During the eccentric rotation of the rotor 2 along the shaft 4 in the circular cavity, since the inner cavity of the cylinder 1 and the cross-section of the rotor 2 are both circular, the relative size of the junction 20 on the rotor 2 does not change during rotation along the inner wall of the cylinder 1, ensuring stable contact and facilitating good sealing.

[0030] Of course, to improve the sealing effect, a rotor sealing strip 5 is provided at the junction 20 of the rotor 2.

[0031] The sliding tongue plate 3 elastically abuts against the circumferential surface of the rotor 2 after passing through the side wall of the cylinder body 1 from outside to inside, and the air inlet 11 and the exhaust port 12 which are communicated with the inner cavity of the cylinder body 1 are arranged on both sides of the cylinder body 1 at the positions where the sliding tongue plate 3 passes through. In order to facilitate work, the air inlet 11 is provided with an electric control valve for controlling the air intake, and the electric control valve is used as a gas expansion device in the utility model. The air inlet 11 controls the volume of high-pressure working medium gas through the electric injection valve, and the high-pressure working medium gas is injected into the cylinder body to drive the rotor 2 to rotate. The exhaust port 12 is provided with a check exhaust valve, and the check exhaust valve is used as a gas compression device in the utility model.

[0032] The sliding tongue plate 3 is installed on the base 30 which is fixed relative to the cylinder body 1, the base 30 is provided with a sliding groove 31 for accommodating the sliding tongue plate 3 and an elastic member 32 for driving the sliding tongue plate 3 to move towards the rotor 2, and the sliding tongue plate 3 elastically abuts against the circumferential surface of the rotor 2 after passing through the side wall of the cylinder body 1 from outside to inside under the driving of the elastic member 32.

[0033] The material of the sliding tongue plate 3 can be high-strength and low-expansion metal material, and the main part is made of light-weight hollow core board with reinforcing rib lattice to reduce kinetic energy loss during sliding. The sliding tongue plate 3 is slidably installed in the base 30, and the extension line of the sliding tongue plate 3 passes through the center of the rotor 2. In order to ensure smooth sliding of the sliding tongue plate 3 and reduce friction, a planar linear bearing 33 is arranged between the sliding tongue plate 3 and the sliding groove 31.

[0034] The elastic member 32 is a spring. For example, a compression spring is arranged on the outside of the sliding tongue plate 3, and the end of the sliding tongue plate 3 is abutted against the circumferential surface of the rotor 2 by the pushing force generated by the compression spring. Figure 1

[0035] In order to facilitate processing, the base 30 is integrally formed with the cylinder body 1, that is, the base 30 is integrally extended outward from the side wall of the cylinder body 1, and then the sliding groove 31 is processed.

[0036] In order to ensure the sealing between the sliding tongue plate 3 and the circumferential surface of the rotor 2, the end of the sliding tongue plate 3 which contacts the circumferential surface of the rotor 2 is provided with a sliding tongue sealing strip 6. Since the rotor 2 rotates eccentrically, in order to ensure that the sliding tongue sealing strip 6 and the circumferential surface of the rotor 2 always achieve good sealing, the utility model adopts the following structure:

[0037] ​A pivot strip 34 is formed on the side of the sliding tongue plate 3 that contacts the circumferential surface of the rotor 2. A groove 61 is provided on the sliding tongue sealing strip 6 to mate with the pivot strip 34. Through the nested engagement between the groove 61 and the pivot strip 34, the sliding tongue sealing strip 6 can swing and connect to the end of the sliding tongue plate 3. In this way, when the rotor 2 rotates eccentrically, the sliding tongue sealing strip 6 can swing accordingly, ensuring that the sliding tongue sealing strip 6 always fits tightly against the circumferential surface of the rotor 2, forming a good seal.

[0038] The following is combined with Figures 2 to 7 The working principle of this utility model as an air compression device is explained.

[0039] See Figure 2 As shown, in this state, with the rotor 2 rotating clockwise as a reference, and the rotor sealing strip 5 on the rotor 2 coinciding with the sealing strip 6 at the end of the sliding tongue plate 6 as the initial state, the entire working space 10 forms a connected cavity.

[0040] See Figure 3 As shown, as the rotor 2 rotates clockwise, the rotor sealing strip 5 on the rotor 2 gradually moves away from the sealing strip 6 at the end of the sliding tongue plate 6. At this time, the sliding tongue plate 6 will divide the working space 10 into a left intake space 101 and a right exhaust space 102, and the intake space 101 is connected to the intake port 11, and the exhaust space 102 is connected to the exhaust port 12.

[0041] See Figure 4 As shown, as the rotor 2 continues to rotate, the space of the intake space 101 will gradually increase and the space of the exhaust space 102 will gradually decrease. During this process, the intake port 11 is in the open state, and the external gas will enter the intake space 101 as the rotor 2 rotates; at the same time, the exhaust port 12 is in the closed state, and the exhaust space 102 is gradually compressed as the space decreases.

[0042] See Figure 5 As shown, when the rotor 2 rotates 180°, in this state, the rotor sealing strip 5 on the rotor 2 and the sealing strip 6 at the end of the sliding tongue plate 3 are exactly in a straight line. At this time, the intake space 101 and the exhaust space 102 are equal in size.

[0043] See Figure 6 As shown, the rotor 2 continues to rotate, the intake space 101 will further increase, and the exhaust space 102 will be further compressed. At this time, the intake port 11 will continue to intake air, and the exhaust port 12 can be opened according to the actual gas compression ratio to exhaust air.

[0044] See Figure 7As shown, the rotor 2 rotates to a state close to a week, at which time the space of the intake space 101 substantially completes the intake, and the compressed gas in the exhaust space 102 is also substantially exhausted, and the rotor 2 continues to rotate into the next working cycle.

[0045] According to the above working principle, the utility model continuously circulates and works.

[0046] Of course, the utility model can also be used as a gas expansion device. The compressed gas inlet 11 enters the intake space 101 through the electric control valve to control the appropriate intake amount, the gas expansion drives the rotor 2 to rotate the rotating shaft 4, and does work to the outside.

[0047] Of course, the above only for the specific embodiments of the utility model, and not to limit the scope of the utility model, any equivalent changes or modifications made according to the structure, features and principles of the utility model patent application scope, should be included in the utility model patent application scope.

Claims

1. A rotary gas compression or expansion device comprising: Cylinder (1), rotor (2), and rotating shaft (4) connected with rotor (2), rotor (2) with circular cross section is pivoted in cylinder (1) through rotating shaft (4), and working space (10) is formed between the circumferential surface of rotor (2) and the inner wall of cylinder (1), characterized in that: The rotating shaft (4) and the rotor (2) are eccentrically distributed, that is, the central axis of the rotating shaft (4) is parallel to but not coincident with the central axis of the rotor (2); The cross section of the inner cavity of the cylinder (1) is circular, and the radius corresponds to the farthest distance from the center of the rotating shaft (4) to the circumferential surface of the rotor (2); A sliding tongue plate (3) passes through the side wall of the cylinder (1) from outside to inside and elastically abuts against the circumferential surface of the rotor (2), and an air inlet (11) and an exhaust port (12) are arranged on the cylinder (1) on both sides of the position where the sliding tongue plate (3) passes through, and the air inlet (11) and the exhaust port (12) are communicated with the inner cavity of the cylinder (1).

2. A rotary gas compression or expansion device according to claim 1, characterised in that: The circumferential surface of the rotor (2) has a joint (20) which is inscribed in the inner wall of the cylinder (1), and the joint (20) is located on the circumferential surface of the rotor (2) at the position farthest from the center of the rotating shaft (4).

3. A rotary gas compression or expansion device according to claim 2, wherein: A rotor sealing strip (5) is arranged at the joint (20) of the rotor (2).

4. A rotary gas compression or expansion device according to claim 1, wherein: When the device is used as a gas expansion device, an electric control valve is arranged at the air inlet (11) to control the air intake; when the device is used as a gas compression device, a check exhaust valve is arranged at the exhaust port (12).

5. A rotary gas compression or expansion device according to claim 1, wherein: The cylinder (1) comprises a cylindrical body and cylinder end covers fixed on the upper and lower ends of the body, and a sealing ring is arranged on the upper and lower end faces of the cylinder (1) and the rotor (2) to form an end face seal with the cylinder end covers.

6. A rotary gas compression or expansion device according to claim 1, wherein: The end of the sliding tongue plate (3) in contact with the circumferential surface of the rotor (2) is provided with a sliding tongue sealing strip (6).

7. A rotary gas compression or expansion device according to claim 6, characterised in that: One side of the sliding tongue plate (3) in contact with the circumferential surface of the rotor (2) is formed with a pivoting strip (34), and a groove (61) is formed in the sliding tongue sealing strip (6) to match the pivoting strip (34), so that the sliding tongue sealing strip (6) can be connected to the end of the sliding tongue plate (3) through the nesting cooperation between the groove (61) and the pivoting strip (34).

8. A rotary gas compression or expansion device according to any one of claims 1 to 7, wherein: The sliding tongue plate (3) is installed on a base (30) fixed relative to the cylinder (1), and the base (30) is provided with a sliding groove (31) for accommodating the sliding tongue plate (3) and an elastic member (32) for pushing the sliding tongue plate (3) to run towards the rotor (2), and the sliding tongue plate (3) passes through the side wall of the cylinder (1) from outside to inside and elastically abuts against the circumferential surface of the rotor (2) under the pushing of the elastic member (32).

9. A rotary gas compression or expansion device according to claim 8, wherein: A planar linear bearing (33) is arranged between the sliding tongue plate (3) and the sliding groove (31), and the elastic member (32) is a spring.

10. A rotary gas compression or expansion device according to claim 8, wherein: The base (30) is integrally formed with the cylinder (1).

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