Integrated type ultrahigh-pressure booster pump

Abstract

The invention discloses an integrated type ultrahigh-pressure booster pump which comprises a proportional electromagnetic valve, a valve plate and a proximity switch. The proximity switch can generate induction with end faces of piston rods and feed back the induction to the proportional electromagnetic valve; the valve plate is connected at the top of a cylinder barrel of an oil cylinder; the proportional electromagnetic valve is connected at the top of the valve plate; high-pressure oil cavities communicated with an oil inlet of the valve plate are formed in a left end cover and a right end cover; the oil inlet of the valve plate is communicated with an oil inlet of the proportional electromagnetic valve; two work oil cavities of the proportional electromagnetic valve are respectively communicated with low-pressure oil cavities on the two sides of a piston in a cylinder barrel of the oil cylinder; the free ends of the two piston rods are respectively in slide fit in the high-pressure oil cavity of the left end cover and the high-pressure oil cavity of the right end cover; oil outlets communicated with the two high-pressure oil cavities are formed in the cylinder barrel of the oil cylinder. By means of the structure, the pump size is smaller, the booster pump is suitable for various occasions, and the work efficiency is higher.

Description

technical field [0001] The invention relates to the technical field of hydraulic oil pumps, in particular to an integrated ultra-high pressure booster pump. Background technique [0002] At present, more and more industries need to use booster pumps to provide power to output higher pressures. Generally speaking, booster pumps with an output pressure exceeding 35MPa are usually called ultra-high pressure booster pumps in the industry. The booster pump in the prior art includes a cylinder body, a left end cover, a right end cover, a piston and a piston rod, which is equivalent to a reciprocating plunger pump, and a piston rod is respectively connected to two ends of the piston, and the left end cover and the right end cover respectively Connected to the two ends of the cylinder body, the piston is slidably connected in the cylinder body, and the ends of the piston rods at the two ends of the piston are respectively slidably connected in the left end cover and the right end co...

AI Technical Summary

Problems solved by technology

[0005] 1) For the first structure, since the principle of supercharging is to generate high pressure of a small area piston rod through the low pressure of a large area piston, if the output pressure of the pump is to be increased, the only way to increase the cross-sectional area of ​​the piston and the cross-sectional area of ​​the piston rod Therefore, either reduce the cross-sectional area of ​​the piston rod or increase the cross-sectional area of ​​the piston. However, the adjustment of this area is within a limited range after all, and to achieve ultra-high pressure output pressure, It is bound to greatly increase the cross-sectional area of ​​the piston, but this will cause a large increase in the cross-sectional size of the piston and its oil cylinder, and then make the volume of the entire booster pump larger. Therefore, on the one hand, it will increase production. cost, on the other hand it cannot be applied to applications with smaller spaces;

[0006] 2) For the second structure, because many parts are involved in the structure, such as low-pressure cylinder, booster piston, front end cover, rear end cover, integrated valve, diversion head, air guide pipe, high-pressure cylinder, one-way valve , plunger and pilot valve, the valve alone has an integrated valve, pilot valve, and the light cylinder has a low-pressure cylinder and a high-pressure cylinder. After these parts are assembled together, the structure becomes complicated; it uses an integrated valve to control the booster. The automatic reversing of the pressure piston, when the booster piston moves left and right in the low-pressure cylinder, the pressure at both ends of the booster piston and the plunger is completely regulated by itself, so the pressure fluctuates for a long time and the feedback speed slower, from attached Image 6 According to the waveform graph of the output pressure of the pump, the pressure wave band is longer, mainly concentrated in the longer idle time, so the reaction to the booster pump is that the work efficiency is low and the response is not sensitive enough;

[0007] 3) For the third structure, although it uses a hydraulic control reversing valve to realize the moving direction of the piston in the plunger booster pump, on the one hand, the connection between the hydraulic control reversing valve and the plunger booster pump is not They cannot be firmly connected together, and the two are still connected by pipelines, which will make the whole device fragmented and easily cause system instability; on the other hand, the one-way valve connected with the high-pressure chamber is also located in the booster pump. The outside is connected to the outside through pipelines, which also makes the structure more complex and bulkier; on the other hand, like the problems of the second structure, its pressure fluctuation time is also longer and the feedback speed is slower. Therefore, there is also the problem that the reaction to the booster pump is low in efficiency and the response is not sensitive enough.

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