Piston valve air suction non-lubricated air compressor

Abstract

The invention belongs to the technical field of compressors, in particular to a piston valve air suction non-lubricated air compressor which comprises a cylinder, a cylinder cover, a crank case, a piston and a connecting rod, wherein the piston is fastened and connected with the connecting rod or is made together with the connecting rod, the piston is provided with a sealing ring and is arranged in the cylinder, and the peripheral surface of the sealing ring and the inner hole wall surface of the cylinder form an air suction channel of the compressor by adopting an offset cylinder or oblique piston or simultaneously adopting the offset cylinder and the oblique piston when in air suction so as to achieve the effect of controlling the air suction by the piston valve. Because an air inlet one-way valve of the traditional compressor is discarded, the structure is simplified, quick-wear parts are reduced, the working reliability is improved, the mechanical noise source and the clearance volume of the compressor are reduced and the volumetric efficiency is improved. In addition, the crank case is used as an air inlet anechoic room, the piston is provided with a guide member and a buffer member which can release the knock strength of the piston to the cylinder, therefore, the noise of the compressor can be effectively lowered.

Description

technical field [0001] The invention belongs to the technical field of air compressors, in particular to an air intake control device of an oil-free lubricated air compressor. Background technique [0002] So far, the existing reciprocating piston-type oil-free air compressors are without exception provided with air inlets and equipped with air inlet check valves to prevent air from entering the working chamber of the compressor during the suction process. During the compression process, the air flows back from the air inlet and sprays back to the outside atmosphere. As we all know, the air inlet of the traditional compressor can only be set on the cylinder head or on the piston, and the air intake check valve used is usually composed of a valve plate, a limit plate and a fastener, which brings three problems. The first problem: the first problem is that the working reliability of the compressor is poor. This is because the intake check valve has many components and the wor...

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Problems solved by technology

As we all know, the air inlet of the traditional compressor can only be set on the cylinder head or on the piston, and the air intake check valve used is usually composed of a valve plate, a limit plate and a fastener, which brings three problems. The first problem: the first problem is that the working reliability of the compressor is poor. This is because the intake check valve has many components and the working environment is harsh. No matter it is set on the cylinder head or on the piston, it cannot avoid strong The vibration and shock of the valve, especially the valve seat and the limit plate flapping at high frequency, is a vulnerable part that is prone to fatigue damage, so the existence of the intake check valve reduces the working reliability of the compressor; the second The first problem is that the noise radiation of the compressor is relatively large. This is because the valve plate of the intake check valve will hit the valve seat and the limit plate at high speed when it is working, and the vibration generated by it will be directly transmitted to the cylinder head or the piston. On the body of the compressor, it is a mechanical noise source, so the existence of the intake check valve increases the noise of the compressor; the third problem is that the volumetric efficiency of the compressor is low, because the intake check valve is set anyway. It must occupy a part of the space. In order to avoid collisions, sufficient sinkholes must be reserved on the piston or on the cylinder head, resulting in a large clearance volume, and the existence of the air inlet will also increase the clearance volume. It is well known that the larger the clearance volume, the lower the volumetric efficiency of the compressor, so the existence of the air inlet and the air inlet check valve reduces the volumetric efficiency of the compressor

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