Polygonal crankshaft of metering pump

Abstract

The invention relates to a measuring pump, in particular to a crank modified structure of the measuring pump. The invention is characterized in that the crank of the measuring pump is a shape of 'Z', and the section of the crank is polygonal. The crank has the advantages of easy positioning, easy adjustment, easy fixing. The machining angle can use digital control wire-electrode cutting and flat machining to reach micrometer accuracy.

Description

Technical field: [0001] The invention relates to a metering pump, in particular to an improved crankshaft structure of the metering pump. Background technique: [0002] Through half a century of practice and application, the demand for the development of metering pumps is increasing day by day, and has been applied in petroleum, chemical industry, metallurgy, oil refining, water supply, thermoelectricity, pharmaceuticals, food and other fields. Now, the mature power drive method and liquid delivery end (pump head) material technology make the new metering pump almost meet the metering delivery requirements of any conventional and special media, and its working pressure and capacity can also meet most of the requirements of industrial production. Today, metering pumps are found wherever precise, continuous addition of fluid is required. However, some deficiencies in the existing metering pumps have become constraints to the development of metering pumps. The N crankshaft of ...

AI Technical Summary

Problems solved by technology

However, some deficiencies in the existing metering pumps have become constraints to the development of metering pumps. The N crankshaft of the metering pump is round, and it is difficult to process: 1. It is not easy for ordinary staff to operate, because it requires High, complex process, only senior technicians have the ability to process N-type crankshafts, and only senior technicians can process N-type crankshafts

2. The scrap rate of the N-type crankshaft is higher than that of the Z-type crankshaft I own, because it has more processing links, and the possibility of errors in each link will increase accordingly

The heat treatment of N-type crankshaft raw materials is relatively difficult (large machining allowance is easy to deform)

3. The processing is dangerous. The original crankshaft is not easy to fix during the manufacturing process. It is only fixed by two center holes, and it is easy to fly out of the lathe, causing casualties

Because of its large machining allowance, the difficulty of manufacturing also increases accordingly, resulting in low precision

5. The process is complicated, the processing of the spouse is difficult, and the angles cannot be consistent

Therefore, even if the crankshaft can be accurately machined, it is not easy to install it correctly; 2. The even parts of each model can only be matched individually, and generally cannot be used universally, which increases the number of parts to be processed, and even costs increase, which is not conducive to production development

3. Because the circular design of the N-type crankshaft on each part will reduce the angle of the parts, so that the error of the overall installation of the metering pump will be greatly increased, the accuracy will decrease, and the scrap rate of the parts will increase accordingly. It will affect the safety and performance of the whole machine

4. Waste of materials, waste of man-hours, large processing allowance, a lot of time spent on a single product, and a lot of material consumption

5. The service life is short, and the material handling is difficult in the heat treatment process (the material is hard and difficult to process), which can easily cause sudden fracture of the crankshaft material

The material is soft and deforms greatly during processing, resulting in a decrease in the accuracy of the crankshaft

The rigidity is poor, easy to break, and there is a certain gap with the Z-type crankshaft

The angles are not consistent, the area in contact with the pair is small, the force is concentrated at a certain point, the wear of the parts is too large, and it is easy to break, which leads to a decrease in precision and a reduction in service life

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