Composite material air release valve plate for compressor and preparation method thereof

Abstract

The invention provides a composite material air release valve plate for a compressor and a preparation method thereof. The material of the air release valve plate is a polyetheretherketone-carbon fiber mixture, and the mixture comprises 1-30 wt% of carbon fiber and 70-99 wt% of polyetheretherketone. Compared with the prior art, the invention has the following advantages that: (1) the air release valve plate is formed by one step through injection molding, thereby saving other processing procedures and being flexible for production; (2) since the composite material is substituted for the metalmaterial, the change of the material changes the natural frequency, so that the noise performance of the compressor can be obviously improved; (3) compared with the metal air release valve plate, thecomposite material air release valve plate has greatly longer flexible life; and (4) since the composite material has much lower specific gravity than stainless steel, the relative resistance force is smaller in the air release process, so that the consumed power of the compressor can be easily lowered.

Description

【Technical field】 [0001] The invention relates to the technical field of compressors, in particular to a composite material exhaust valve plate for a compressor and a preparation method thereof. 【Background technique】 [0002] Since the exhaust valve plate plays a pivotal role in the suction and exhaust process of the compressor, it will directly affect the power, noise and other performance parameters of the compressor, so the material requirements for the exhaust valve plate must be very high ;Unfortunately, from the current research, production and design, it is difficult to have specific design data for exhaust valves, especially the impact acceleration and the impact load caused by it, the direction and uniformity of the material and its streamline and the valve There are no reports on sheet warpage, elasticity and stiffness. In the process of practice accumulation, the inventor summed up the following requirements for the exhaust valve plate of the rotary compressor: ...

AI Technical Summary

Problems solved by technology

[0008] (6) The sound damping of the material is large; when the exhaust valve is working, it impacts with the stopper and the valve seat at high frequency, and it is easy to generate noise

[0011] The current metal exhaust valve plate has a relatively high elastic modulus, but there are always unstable factors in the rolling and throwing process. For the unthrown parts, cracks are easy to occur and expand during work, which affects the life of the compressor; generally In other words, the higher the speed of the compressor, the more difficult it is to guarantee the life of the exhaust valve plate, and the greater the resistance loss may be. Therefore, the exhaust valve plate is a factor that limits the high-speed operation of the compressor, and also limits the improvement of the performance of the compressor.

[0012] The current metal exhaust valve plate is usually punched into a certain shape with a steel strip, and then made by rolling and polishing. Generally speaking, it can only be made into a flat part, and it is not easy to make a shape that is beneficial to the compressor, such as: Spoon or Convex

[0013] Another disadvantage of the current metal exhaust valve plate is that it is heavy. In a high-speed compressor, the running resistance is large and the followability is poor, which makes it difficult to improve the performance of the compressor.

[0014] During the working process, the existing metal exhaust valve plate repeatedly impacts with the valve seat and the lift limiting plate, resulting in relatively loud noise

[0015] The current metal exhaust valve plate needs to be made through multiple processes such as blanking, punching, deburring, rough rolling and fine rolling, etc. The production cycle is long, the energy consumption is large, and the production cost is high.

[0016] Patent 200810207995.3 uses a mixture of polyether ether ketone and glass fiber to make the exhaust valve plate. There is no control on the crystallinity, fiber length and streamline of PEEK. The mixture of polyether ether ketone and glass fiber can ensure rigidity, creep resistance, Warpage and impact fatigue are still lacking in the actual requirements for the exhaust valve.

Images