Compressor

Abstract

The invention discloses a compressor. While improving the compression efficiency of the compressor, the durability of the elastic seal provided in the poppet valve is improved. The compressor is composed of: a compressor cylinder block (51) having a cylindrical cylinder space (50a), a compressor cylinder cover (52) installed on the cylinder body to cover the cylinder space, and a freely slidable A compressor piston (53) that fits into the cylinder space, and a poppet valve (70) that can open and close cover the air passage hole (52b) communicating with the cylinder space. The poppet valve has a valve body (71) supported on a support surface (52c) and covering an air passage hole, and a thin plate-shaped elastic sealing layer (73) is provided on a part of the valve body in contact with the support surface. Also, the inner peripheral edge of the annular outer peripheral surface (73b) in contact with the bearing surface in the elastic sealing layer is located on the outer peripheral side than the inner peripheral edge of the air passage hole.

Description

technical field [0001] The invention relates to a compressor for compressing and supplying fluid (mainly gas) such as air, in particular to a piston compressor. Furthermore, the present invention relates to a compressor for supplying compressed air to a fuel injection device of an internal combustion engine. Background technique [0002] Piston compressors for compressing and supplying fluid such as air are known in the past. For example, Japanese Patent Application Publication No. 63-54909 and Japanese Patent Application Publication No. 63-65181 disclose piston compressors for refrigeration equipment. And, it is also known to use an air compressor in a fuel injection device of an internal combustion engine. For example, Japanese Patent No. 2820782 discloses a piston type air pump (compressor air pump) for supplying compressed air to an air fuel injection device of a two-stroke engine. machine). [0003] The structure of this type of piston compressor is that a cylinder he...

AI Technical Summary

Problems solved by technology

[0004] In such a compressor, there is a problem that the portion of the inflow and outflow passages connected from the check valve to the space in the cylinder space forms a dead zone when the fluid in the cylinder space is compressed by the reciprocating motion of the piston, which becomes a cause of a drop in compression efficiency. A factor

In addition, in the case of a poppet-type check valve, in order to prevent the poppet valve from contacting the support surface during opening and closing and to ensure the sealing performance when closing, a thin rubber seal is pasted on the support surface of the poppet valve. material (elastic sealing material), however, the durability of the rubber sealing material is prone to problems

In particular, for the part of the rubber sealing material that faces the inner peripheral edge of the bearing surface, compared to the part that is in contact with the bearing surface that is compressed and deformed, since the inner peripheral part is not compressed and deformed, there is an inner gap with the bearing surface. The problem that the amount of compression deformation of the part facing the peripheral edge changes greatly

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