Mounting structure of diaphragm of diaphragm compressor

Abstract

The utility model relates to the technical field of sealing installation, in particular to a diaphragm compressor diaphragm installation structure which comprises a cylinder cover, a cylinder body connected to the cylinder cover and a diaphragm, the diaphragm is arranged between the cylinder cover and the cylinder body, an oil cavity is formed between the diaphragm and the cylinder body, and an air cavity is formed between the diaphragm and the cylinder cover; the sealing ring is connected to the diaphragm and used for sealing connection between the diaphragm and the cylinder cover as well as between the diaphragm and the cylinder body; and the damping piece is arranged between the sealing ring and the diaphragm. The sealing effect is improved by arranging the sealing rings and the O-shaped rings between the diaphragm and the cylinder body and between the diaphragm and the cylinder cover, and the belleville springs are arranged between the sealing rings and the diaphragm, so that continuous mechanical stress generated by vibration in equipment operation on the diaphragm is relieved, and the service life of the diaphragm is prolonged.

Description

Technical Field

[0001] This application relates to the technical field of sealing installation, and particularly to an installation structure of a diaphragm of a diaphragm compressor. Background Art

[0002] A diaphragm compressor is a positive displacement compressor. A piston or a plunger pushes a working medium in an oil cylinder into an oil chamber. When the medium in the oil chamber gradually decreases, the gas to be compressed enters the gas chamber. After reaching a preset volume, the piston or the plunger pushes the oil cylinder to input the medium into the oil chamber, drives the diaphragm to move, compresses the gas in the gas chamber, and discharges it from the diaphragm compressor, achieving the purpose of gas compression.

[0003] Between the compression cylinder block and the cylinder head of a diaphragm compressor, there is usually only one sealing ring for sealing, and the sealing effect is poor. During the long-term operation of the compressor, the mechanical vibration of the compressor generates continuous mechanical stress on the diaphragm, resulting in displacement or deformation, which easily leads to damage of the diaphragm. Then the compression cylinder will leak and cannot be used continuously. It is only possible to remove the cylinder head from the cylinder block and replace the sealing ring and the diaphragm. The compression cylinder with this structure has low production efficiency and high maintenance cost. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the background art.

[0005] Therefore, the utility model provides an installation structure of a diaphragm of a diaphragm compressor.

[0006] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0007] An installation structure of a diaphragm of a diaphragm compressor, comprising

[0008] a cylinder head, a cylinder block connected to the cylinder head, and

[0009] a diaphragm, the diaphragm is arranged between the cylinder head and the cylinder block, an oil chamber is formed between the diaphragm and the cylinder block, and a gas chamber is formed between the diaphragm and the cylinder head;

[0010] a sealing ring, the sealing ring is connected to the diaphragm for sealing connection between the diaphragm and the cylinder head and the cylinder block;

[0011] a shock absorber, the shock absorber is arranged between the sealing ring and the diaphragm.

[0012] Furthermore, an overflow surface is arranged on the side walls of the sealing ring facing the cylinder head and the cylinder block, and the overflow surface is inclined towards the axis of the diaphragm.

[0013] Further, a return surface is provided on the side walls of the sealing ring facing the cylinder head and the cylinder block. The return surface is inclined in a direction away from the axis of the diaphragm. The return surface is provided on the side of the overflow surface away from the diaphragm.

[0014] Further, an O-ring is embedded between the sealing ring and the cylinder head and the cylinder block.

[0015] Further, a plurality of O-rings are provided. The plurality of O-rings are divided into two groups. One group of O-rings is arranged close to the axis of the diaphragm, and the other group is arranged away from the axis of the diaphragm. The return surface and the overflow surface are located between the two groups of O-rings.

[0016] Further, an overflow channel is provided on the cylinder block. One end of the overflow channel faces the part between the return surface and the overflow surface.

[0017] Further, a friction plate is connected to the side wall of the sealing ring facing the diaphragm through a shock absorber. The friction plate contacts the diaphragm to increase the friction between the sealing ring and the diaphragm.

[0018] Further, the shock absorber is a disc spring.

[0019] The beneficial effect of the present utility model is that, by providing a sealing ring between the diaphragm and the cylinder block and the cylinder head, on the one hand, an overflow surface, an overflow channel and a return surface are provided between the sealing ring and the cylinder block and the cylinder head, reducing the possibility of hydraulic oil leakage. Moreover, multiple O-rings are provided between the sealing ring and the cylinder block and the cylinder head for sealing, improving the sealing effect. On the other hand, a disc spring is provided between the sealing ring and the diaphragm, thereby reducing the continuous mechanical stress on the diaphragm caused by the vibration during the operation of the equipment, and thus improving the service life of the diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present utility model will be further described below with reference to the drawings and embodiments.

[0021] Figure 1 is a schematic diagram of the installation structure of the diaphragm of the diaphragm compressor in the present utility model.

[0022] Figure 2 is a schematic diagram of the structure of the sealing ring in the present utility model.

[0023] In the figure: 1, cylinder block; 2, cylinder head; 3, through hole; 4, oil passage hole; 5, diaphragm; 6, oil cavity; 7, gas cavity; 8, sealing ring; 9, overflow surface; 10, return surface; 11, overflow channel; 12, O-ring; 13, friction plate; 14, disc spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The present utility model will now be described in further detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only showing the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0025] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model. In addition, the features defined with "first", "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise stated, the meaning of "a plurality" is two or more.

[0026] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0027] An installation structure of a diaphragm of a diaphragm compressor includes a cylinder block 1, a cylinder head 2, and a diaphragm 5. The cylinder block 1 is fixedly connected to the cylinder head 2. An installation cavity is provided between the cylinder block 1 and the cylinder head 2. The diaphragm 5 is hermetically connected between the cylinder block 1 and the cylinder head 2 through two sealing rings 8. The diaphragm 5 is located in the installation cavity, inside the sealing ring 8. The part of the diaphragm 5 located in the installation cavity is the working surface of the diaphragm 5. An oil cavity 6 is formed between the diaphragm 5 and the cylinder block 1, and an air cavity 7 is formed between the diaphragm 5 and the cylinder head 2.

[0028] The cylinder block 1 is provided with a through hole 3 and an oil passage hole 4. The through hole 3 is coaxially arranged with the cylinder block 1 for the piston to move axially along the cylinder block 1. The inner diameter of the end of the through hole 3 facing the diaphragm 5 gradually increases and is in a flared shape. Preferably, the diameter of the end of the through hole 3 facing the diaphragm 5 is adapted to the working surface of the diaphragm 5. There are several oil passage holes 4, and the oil passage holes 4 are arranged between the installation cavity and the through hole 3. The oil passage holes 4 are used to connect the oil cavity 6 and the through hole 3. The cylinder head 2 is provided with an air inlet passage and an air outlet passage, and both the air inlet passage and the air outlet passage are communicated with the air cavity 7.

[0029] The sealing ring 8 is provided with an overflow surface 9 and a return surface 10 on the side walls facing the cylinder head 2 and the cylinder block 1. The return surface 10 is arranged on the side away from the axis of the diaphragm 5 of the overflow surface 9. The overflow surface 9 and the return surface 10 are arranged at intervals. The overflow surface 9 is inclined towards the axis of the diaphragm 5, and the return surface 10 is inclined towards the direction away from the axis of the diaphragm 5. An overflow channel 11 is provided on the cylinder block 1, and one end of the overflow channel 11 is opposite to the part between the return surface 10 and the overflow surface 9. If the hydraulic oil in the oil chamber 6 of the cylinder block 1 leaks or the pressure in the oil chamber 6 is too high, the hydraulic oil can flow out through the overflow surface 9 and the overflow channel 11 between the cylinder block 1 and the sealing ring 8, and the return surface 10 can prevent the hydraulic oil from leaking out.

[0030] An O-ring 12 is arranged between the sealing ring 8, the cylinder head 2 and the cylinder block 1. Grooves for accommodating the O-ring 12 are provided on the sealing ring 8, the cylinder head 2 and the cylinder block 1. There can be multiple O-rings 12. The multiple O-rings 12 are divided into two groups. One group of O-rings 12 is arranged close to the axis of the diaphragm 5, and the other group is arranged away from the axis of the diaphragm 5. The return surface 10 and the overflow surface 9 are located between the two groups of O-rings 12. In this embodiment, the number of O-rings 12 in each group of O-rings 12 is one.

[0031] A friction plate 13 is connected to the side wall of the sealing ring 8 facing the diaphragm 5 through a shock-absorbing member. A friction surface is provided on the side wall of the friction plate 13 facing the diaphragm 5. The friction surface can be set as a frosted surface or provided with a number of protrusions to increase the friction force with the diaphragm 5 when contacting the diaphragm 5. The shock-absorbing member can be a buffer pad or a disc spring 14. The setting of the shock-absorbing member can reduce the continuous mechanical stress generated by the vibration during the operation of the equipment on the diaphragm 5, thereby increasing the service life of the diaphragm 5.

[0032] In summary, in this application, by arranging the sealing ring 8 between the diaphragm 5, the cylinder block 1 and the cylinder head 2, on the one hand, the overflow surface 9, the overflow channel 11 and the return surface 10 are arranged between the sealing ring 8, the cylinder block 1 and the cylinder head 2 to reduce the possibility of hydraulic oil leakage. Moreover, multiple O-rings 12 are arranged between the sealing ring 8, the cylinder block 1 and the cylinder head 2 for sealing to improve the sealing effect. On the other hand, a disc spring 14 is arranged between the sealing ring 8 and the diaphragm 5, thereby reducing the continuous mechanical stress generated by the vibration during the operation of the equipment on the diaphragm 5, and thus increasing the service life of the diaphragm 5.

[0033] Based on the above-mentioned ideal embodiments of the present invention as inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A diaphragm installation structure for a diaphragm compressor, characterized in that: include a cylinder head (2), a cylinder body (1) connected to the cylinder head (2), and A diaphragm (5), the diaphragm (5) being arranged between the cylinder head (2) and the cylinder body (1), an oil chamber (6) being formed between the diaphragm (5) and the cylinder body (1), and an air chamber (7) being formed between the diaphragm (5) and the cylinder head (2); A sealing ring (8), the sealing ring (8) being connected to the diaphragm (5) and used for sealing connection between the diaphragm (5) and the cylinder head (2) and the cylinder body (1); A shock absorbing member is arranged between the sealing ring (8) and the diaphragm (5).

2. The diaphragm installation structure of the diaphragm compressor according to claim 1, characterized in that: An overflow surface (9) is arranged on the side wall of the sealing ring (8) facing the cylinder cover (2) and the cylinder body (1), and the overflow surface (9) is arranged to be inclined toward the axis of the diaphragm (5).

3. The mounting structure of the diaphragm of the diaphragm compressor according to claim 2, characterized in that: A return surface (10) is arranged on the side wall of the sealing ring (8) facing the cylinder head (2) and the cylinder body (1); the return surface (10) is arranged in an inclined direction away from the axis of the diaphragm (5); and the return surface (10) is arranged on the side of the overflow surface (9) away from the diaphragm (5).

4. The mounting structure of the diaphragm of the diaphragm compressor according to claim 3, characterized in that: An O-ring (12) is embedded between the sealing ring (8), the cylinder cover (2) and the cylinder body (1).

5. The mounting structure of the diaphragm of the diaphragm compressor according to claim 4, characterized in that: A plurality of O-rings (12) are provided, and the plurality of O-rings (12) are divided into two groups, one group of O-rings (12) is provided close to the axis of the diaphragm (5), and the other group is provided away from the axis of the diaphragm (5), and the return surface (10) and the overflow surface (9) are located between the two groups of O-rings (12).

6. The diaphragm installation structure of the diaphragm compressor according to claim 3, characterized in that: The cylinder body (1) is provided with an overflow channel (11), and one end of the overflow channel (11) is opposite to the portion between the return surface (10) and the overflow surface (9).

7. The mounting structure of the diaphragm of the diaphragm compressor according to claim 1, characterized in that: A friction plate (13) is connected to the side wall of the sealing ring (8) facing the diaphragm (5) via a shock-absorbing member, and the friction plate (13) is in contact with the diaphragm (5) to increase the friction between the sealing ring (8) and the diaphragm (5).

8. The diaphragm installation structure of the diaphragm compressor according to claim 7, characterized in that: The shock absorbing component is a disc spring (14).

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