A water lubricated plunger pump

Abstract

The invention discloses a water lubrication plunger pump. The water lubrication plunger pump comprises a shell, a left end cover, a right end cover, a cam shaft, a distributing valve block, plunger piston shoe assemblies, compression springs and distributing valves. The left end cover and the right end cover are installed on the shell. The left end and the right end of the cam shaft are installed on the left end cover and the right end cover. The distributing valve block is fixedly installed on the shell and is provided with a flow inlet channel, a flow outlet channel and plunger cavities. The plunger piston shoe assemblies are arranged in the plunger cavities, stretch in the shell and comprise plungers and piston shoes. The compression springs are vertically arranged in the distributing valve block. The distributing valves are arranged in the positions, corresponding to the plunger piston shoe assemblies, of the distributing valve block. According to the water lubrication plunger pump, water can be used as a medium to conduct dynamic and static pressure mixing supporting, and dynamic and static pressure mixing supporting has the beneficial effects of being high in rotation precision, wide in speed and load range, low in friction resistance and power consumption and the like. The problem that a water lubrication sliding bearing is likely to be abraded under the high-speed and heavy-load condition is solved, the reliability of the plunger pump is improved, and meanwhile the water lubrication plunger pump has the beneficial effects of being free of pollution, small in maintenance and the like.

Description

technical field [0001] The invention belongs to the field of water lubricated plunger pumps. Background technique [0002] With the emergence of the energy crisis and the improvement of the world's environmental protection diet, and the natural advantages of the water medium itself such as no pollution and good safety, water hydraulic technology has the advantages of oil pressure systems in many fields (such as underwater operations, buoyancy adjustment, etc.) Comparable advantages, so water hydraulic technology has been developed rapidly. [0003] The traditional camshaft plunger pump adopts the crank connecting rod mechanism, and the friction pairs of the transmission parts are lubricated by mineral lubricating oil, so the oil-water separation structure must be adopted. The main problems of the plunger pump with this structure are: [0004] 1) The speed is low, the volume is large, the power-to-mass ratio is low, and the lubricating oil chamber is in a closed state. Incre...

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Problems solved by technology

[0006] Aiming at the above defects or improvement needs of the prior art, the present invention provides a water-lubricated plunger pump, which can realize the water lubrication of all friction pairs, and can ensure the stability under high-speed and high-pressure working conditions, and has a high The power density ratio may solve the problem of oil pollution through full water lubrication, which has the advantages of no pollution and less maintenance. The pump is suitable for seawater or fresh water as the working medium

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