Sealing gasket capable of reducing gas leakage and piston compressor

Abstract

The utility model relates to a sealing gasket capable of reducing gas leakage and a piston type compressor, which comprise a cylinder cover gasket, a circle of raised sealing rib A is arranged on the periphery of one side of the cylinder cover gasket facing the cylinder cover, a circle of sealing rib B is arranged on the cylinder cover gasket corresponding to a suction hole of the valve plate, and the sealing rib B surrounds the suction hole. The protruding height of the sealing rib B surrounding the air suction hole by the sealing rib B is greater than that of the sealing rib A; according to the utility model, the sealing effect is improved, so that the air suction efficiency of the compressor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of reciprocating piston refrigeration compressors, in particular to a sealing gasket for reducing gas leakage and a piston compressor. Background Art

[0002] When a piston compressor works, it sucks and compresses refrigerant through the reciprocating motion of a piston to convert low-temperature and low-pressure gas into high-temperature and high-pressure gas. During this process, the valve group continuously opens and closes. The valve group of an existing piston compressor generally includes a cylinder head, a cylinder head gasket, an exhaust valve plate, a valve plate, a suction valve plate, a valve plate gasket, and cylinder head screws. The cylinder head, cylinder gasket, valve plate, and valve plate gasket are fastened to the cylinder block by the cylinder head screws. The cylinder head gasket seals and separates the suction and exhaust holes in the inner cavity of the cylinder head and the valve plate to form high and low pressure chambers. On the other side of the valve plate, all or part of the suction and exhaust holes of the valve plate are distributed in the cylinder. Therefore, the part of the valve plate corresponding to the cylinder is not supported, and the valve plate will be slightly deformed. The pressing force of the cylinder head screw transmitted to the pressing force of the cylinder head gasket in the cylinder part is much smaller, which leads to a certain amount of leakage during the suction and exhaust processes, directly affecting the working efficiency of the compressor. Summary of the Invention

[0003] The purpose of the utility model is to solve the problems existing in the above-mentioned prior art, and provide a sealing gasket for reducing gas leakage and a piston compressor.

[0004] The specific scheme of the utility model is: a sealing gasket for reducing gas leakage, including a cylinder head gasket installed between the cylinder head and the valve plate. A raised sealing rib A is provided around the outer periphery of the side of the cylinder head gasket facing the cylinder head. A sealing rib B is provided at the position corresponding to the suction hole of the valve plate on the cylinder head gasket. The sealing rib B surrounds the suction hole, and the raised height of the sealing rib B surrounding the suction hole is greater than the raised height of the sealing rib A.

[0005] Further, the raised height of the sealing rib A is 0.03 - 1.0 mm.

[0006] Further, the raised height of the sealing rib B is 0.03 - 1 mm, and the height difference between the sealing rib B and the sealing rib A is 0.005 - 0.5 mm.

[0007] Further, it also includes a cylinder head spacer installed at the suction hole between the valve plate and the cylinder head. A sealing rib B is provided on the side of the cylinder head spacer facing the cylinder head. A plurality of elastic pieces are provided on the periphery of the cylinder head spacer, and the elastic pieces are used for clamping on the cylinder head.

[0008] The utility model also provides a compressor equipped with the above-structured sealing gasket.

[0009] The utility model has the following advantages compared with the prior art: By setting a sealing rib structure and a cylinder head spacer, a good sealing effect can be achieved, thereby reducing the leakage at the high and low pressure chambers, effectively improving the refrigerating capacity of the compressor and enhancing the energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a three-dimensional schematic view of the cylinder head gasket of the utility model;

[0011] Figure 2 is Figure 1 the front view of

[0012] Figure 3 is a three-dimensional view of the cylinder head spacer of the utility model;

[0013] Figure 4 is Figure 3 the side view of

[0014] Figure 5 is a schematic view of the pump body and valve group of a piston compressor;

[0015] In the figure: 1. Cylinder head gasket; 2. Sealing rib A; 3. Sealing rib B; 4. Cylinder head spacer; 5. Spring piece. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] Refer to Figures 1-5 , this embodiment is a sealing gasket for reducing gas leakage, including a cylinder head gasket 1, which is installed between the cylinder head and the valve plate. A raised sealing rib A 2 is provided around the outer periphery of the side of the cylinder head gasket 1 facing the cylinder head. A sealing rib B 3 is provided around the suction hole of the cylinder head gasket 1 corresponding to the valve plate, and the sealing rib B 3 surrounds the suction hole. Further, the height of the raised sealing rib A 2 is 0.03 - 1.0 mm.

[0017] Further, the height of the raised sealing rib B 3 is 0.03 - 1.0 mm, and the height difference between the sealing rib B 3 and the sealing rib A 2 is 0.005 - 0.5 mm.

[0018] Further, the cylinder head gasket 1 can be split into two parts. One part is a circle, which is tightly sealed against the edge of the cylinder head, and the other part is the cylinder head spacer 4. The cylinder head spacer 4 is installed at the suction hole between the valve plate and the cylinder head. The cylinder head spacer 4 is generally an annular thin sheet. A sealing rib B 3 is provided around the side of the annular thin sheet facing the cylinder head, and several spring pieces 5 are provided around the periphery of the annular thin sheet. The spring pieces 5 are used for clamping on the cylinder head.

[0019] The present utility model further provides a compressor, which is equipped with the sealing gasket having the above structure. When assembling the cylinder head assembly, before the valve plate presses the cylinder head gasket 1, the valve plate has already come into contact with the cylinder head spacer 4 first. After tightening the cylinder head screws, the valve plate contacts the cylinder head gasket 1 and completes the sealing between the high-pressure chamber and the outside.

[0020] Since the height of the sealing rib B3 in the middle part is higher than that of the peripheral sealing rib A2, the amount of deformation of the sealing rib B3 under pressure is greater than that of the sealing rib A2, and the micro-deformation of the middle part of the valve plate is greater, resulting in a relatively greater pressure. Therefore, the overall sealing effect will be improved.

Claims

1. A sealing gasket for reducing gas leakage, characterized in that: It includes a cylinder head gasket installed between the cylinder head and the valve plate. There is a ring of raised sealing ribs A on the outer periphery of the side of the cylinder head gasket facing the cylinder head. There is a ring of sealing ribs B at the position corresponding to the suction hole of the valve plate on the cylinder head gasket. The sealing ribs B surround the suction hole, and the raised height of the sealing ribs B is greater than that of the sealing ribs A.

2. The sealing gasket for reducing gas leakage according to claim 1, characterized in that: The raised height of the sealing ribs A is 0.03 - 1.0 mm.

3. The gasket for reducing gas leakage according to claim 2, characterized in that: The raised height of the sealing ribs B is 0.03 - 1.0 mm, and the height difference between the sealing ribs B and the sealing ribs A is 0.005 - 0.5 mm.

4. A gasket for reducing gas leakage according to claim 1, characterized in that: It further includes a cylinder head spacer installed at the suction hole between the valve plate and the cylinder head. There is a ring of sealing ribs B on the side of the cylinder head spacer facing the cylinder head. There are several elastic pieces on the periphery of the cylinder head spacer, and the elastic pieces are used for clamping on the cylinder head.

5. A piston compressor, characterized in that: Equipped with the sealing gasket according to any one of claims 1 - 4.

Images