Air cylinder shaft side clearance adjusting structure
By setting a clearance adjustment chamber in the cylinder seat and using a push rod and O-ring sealing assembly, the problem of limited adjustment range of traditional clearance adjustment mechanisms is solved, realizing 0-100% air volume adjustment and improving the operating stability of the compressor.
Patent Information
- Application Number
- CN202423156865.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-20
AI Technical Summary
Traditional clearance air volume adjustment mechanisms are difficult to achieve precise adjustment of less than 50% in medium and large reciprocating piston compressors, resulting in the inability to meet adjustment requirements when more precise adjustment is needed.
A clearance adjustment chamber is set in the cylinder seat, and the piston is driven to move in the clearance adjustment chamber by the push rod. Combined with the O-ring sealing assembly, the air volume range can be precisely adjusted, and the adjustment range is extended to 0 to 100%.
It enables precise adjustment of clearance air volume, meets adjustment requirements under different operating conditions, and improves the stability of compressor operation.
Smart Images
Figure CN223482868U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cylinder clearance adjustment technology, specifically to a cylinder shaft clearance adjustment structure. Background Technology
[0002] In the design of medium and large reciprocating piston compressors, a clearance volume adjustment mechanism is typically included. Its main function is to precisely adjust the clearance volume within the cylinder. Traditional clearance volume adjustment mechanisms are usually installed on the side of the cylinder head. While this layout allows for some adjustment of the clearance volume, its adjustment range is limited. Specifically, this traditional method struggles to cover a volume range below 50%, meaning that it may not be able to meet the requirements for more precise adjustments. Therefore, we propose a cylinder shaft clearance adjustment structure. Utility Model Content
[0003] The purpose of this invention is to provide a cylinder shaft clearance adjustment structure to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a cylinder shaft clearance adjustment structure, including a cylinder seat, a clearance adjustment cavity is provided in the cylinder seat, a piston is assembled in the clearance adjustment cavity, the size and shape of the piston are adapted to the clearance adjustment cavity, a push rod is assembled in the cylinder seat, the push rod is fixedly connected to the side wall of the piston, a first sealing assembly is assembled between the piston and the clearance adjustment cavity, and a second sealing assembly is assembled between the push rod and the cylinder seat.
[0005] Preferably, the clearance adjustment cavity is annular.
[0006] Preferably, the clearance adjustment cavities are circularly and evenly distributed within the cylinder seat.
[0007] Preferably, the first sealing assembly includes a first O-ring and a second O-ring, the first O-ring being engaged with the inner ring sidewall of the piston, and the second O-ring being engaged with the outer ring sidewall of the piston, and the number of the first O-ring and the second O-ring is at least two.
[0008] Preferably, the second sealing assembly includes a third O-ring, which is respectively snapped into the connection between the push rod and the cylinder seat.
[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: A cylinder shaft clearance adjustment structure, compared with the traditional clearance air volume adjustment mechanism, this utility model sets the clearance adjustment chamber inside the cylinder seat, on the shaft side inside the cylinder. By using a push rod to drive the piston to move in the clearance adjustment chamber, the clearance air volume can be adjusted within a range. The adjustment structure of this utility model can make the adjustment range of clearance air volume more precise, and can realize the adjustment operation of 0-100% air volume range, meet the adjustment needs of the compressor for clearance air volume in different operating conditions, and improve the stability of the compressor during operation. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the structure of this utility model.
[0011] Figure 2 for Figure 1 Detailed image of point a in the image.
[0012] In the diagram: 1. Cylinder seat; 2. Clearance adjustment chamber; 3. Piston; 4. Push rod; 5. First sealing assembly; 51. First O-ring; 52. Second O-ring; 6. Second sealing assembly; 61. Third O-ring. Detailed Implementation
[0013] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
[0014] Example 1
[0015] See also Figure 1 and Figure 2 This utility model provides a technical solution: a cylinder shaft clearance adjustment structure, including a cylinder seat 1, a clearance adjustment cavity 2 is provided in the cylinder seat 1, the clearance adjustment cavity 2 is annularly opened in the cylinder seat 1, a piston 3 is assembled in the clearance adjustment cavity 2, the piston 3 is adapted to the size and shape of the clearance adjustment cavity 2, a push rod 4 is assembled in the cylinder seat 1, one end of the push rod 4 is connected to an external driving device, and the other end of the push rod 4 is connected to the side wall of the piston 3. By driving the piston 3 to adjust its position in the clearance adjustment cavity 2 through the push rod 4, the air volume range in the compressor cylinder can be adjusted. Compared with the traditional clearance adjustment structure in the compressor, this utility model sets the clearance adjustment cavity 2 in the cylinder seat 1, which increases the air volume adjustment range and can adjust the air volume range from 0 to 100% without dead angle.
[0016] A first sealing assembly 5 is installed between the piston 3 and the clearance adjustment chamber 2, and a second sealing assembly 6 is installed between the push rod 4 and the cylinder seat 1. By setting the first sealing assembly 5 and the second sealing assembly 6, the sealing performance between this structure and the cylinder seat 1 is increased, thereby improving the accuracy of this structure in adjusting the air volume range.
[0017] The first sealing assembly 5 includes a first O-ring 51 and a second O-ring 52. The first O-ring 51 is engaged with the inner ring sidewall of the piston 3, and the second O-ring 52 is engaged with the outer ring sidewall of the piston 3. There are at least two of the first O-ring 51 and the second O-ring 52. The first O-ring 51 and the second O-ring 52 provide a good seal between the piston 3 and the clearance adjustment chamber 2.
[0018] The second sealing assembly 6 includes two third O-rings 61, which are respectively fitted onto the side wall of the push rod 4. The third O-rings 61 are distributed at the connection between the push rod 4 and the cylinder seat 1. The third O-rings 61 can effectively seal the connection between the push rod 4 and the cylinder seat 1.
[0019] Working principle: During use, this structure adjusts the air volume range of the clearance by moving the piston 3 within the clearance adjustment chamber 2 via the push rod 4. When the piston 3 is at the leftmost end of the clearance adjustment chamber 2, the piston 3 completely closes the clearance adjustment chamber 2, and the set clearance air volume range is 0%. When the push rod 4 moves the piston 3 to the rightmost end of the clearance adjustment chamber 2, the clearance adjustment chamber 2 is in maximum communication with the cylinder, and the clearance air volume range is 100%.
[0020] Example 2
[0021] The technical solution provided in this embodiment differs from that in Embodiment 1 in that: the clearance adjustment chamber 2 is circularly and uniformly opened in the cylinder seat 1, and each clearance adjustment chamber 2 is equipped with a piston 3. Each piston 3 has a corresponding push rod 4 fixedly connected to its side wall. By refining the clearance adjustment chamber 2 into multiple chambers, the position of the piston 3 in each clearance adjustment chamber 2 can be controlled respectively, so that the clearance air volume range can be adjusted more precisely to meet more adjustment needs.
Claims
1. A cylinder shaft clearance adjustment structure, characterized in that, The cylinder includes a cylinder seat (1), a clearance adjustment cavity (2) is provided in the cylinder seat (1), a piston (3) is assembled in the clearance adjustment cavity (2), the size and shape of the piston (3) are adapted to the clearance adjustment cavity (2), a push rod (4) is assembled in the cylinder seat (1), the push rod (4) is fixedly connected to the side wall of the piston (3), a first sealing assembly (5) is assembled between the piston (3) and the clearance adjustment cavity (2), and a second sealing assembly (6) is assembled between the push rod (4) and the cylinder seat (1).
2. The cylinder shaft clearance adjustment structure according to claim 1, characterized in that: The clearance adjustment cavity (2) is annular.
3. The cylinder shaft clearance adjustment structure according to claim 1, characterized in that: The clearance adjustment cavity (2) is circular and evenly distributed within the cylinder seat (1).
4. The cylinder shaft clearance adjustment structure according to claim 1, characterized in that: The first sealing assembly (5) includes a first O-ring (51) and a second O-ring (52). The first O-ring (51) is engaged with the inner ring sidewall of the piston (3), and the second O-ring (52) is engaged with the outer ring sidewall of the piston (3). The number of the first O-ring (51) and the second O-ring (52) is at least two.
5. The cylinder shaft clearance adjustment structure according to claim 1, characterized in that: The second sealing assembly (6) includes a third O-ring (61), which is respectively snapped into the connection between the push rod (4) and the cylinder seat (1).