Variable full water lubricated axial piston pump

Abstract

The invention discloses a variable axial plunger type water pump with full-water lubrication. The variable axial plunger type water pump is mainly composed of a spindle, a front end cover, a bearing, a shell, an inclined disc, a slipping shoe, plungers, a return stroke disc, a ball hinge, a return stroke spring, a cylinder body, a flow distribution valve, unloading valves and a rear end cover. When the spindle rotates, the linear reciprocating movement of the plungers is achieved under the effect of the inclined disc and the return stroke disc, water is sucked and discharged by the plunger type water pump by controlling opening and closing of the flow distribution valve, and meanwhile the number of the actually working plungers is controlled by controlling opening of the unloading valves so as to achieve the variable function. The variable axial plunger type water pump with full-water lubrication is compact in structure, high in fouling-resistant capacity and high in working pressure. Compared with a traditional inclined disc variable mechanism, the water pump has the most remarkable advantages that the variable mechanism is simple, variation is easy, and automatic variation can be achieved during high pressure. The water pump can be used for pumping seawater, fresh water or other liquid with low viscosity like HFA, the variable function is automatically achieved when a certain working pressure is reached, the output flow is reduced so as to reduce the required power, and the water pump can normally work under multiple working conditions and is particularly suitable for the occasions with deep sea constant driving power.

Description

technical field [0001] The invention relates to a plunger pump, in particular to a variable full water lubricated axial plunger water pump, which belongs to the technical field of plunger pumps. Background technique [0002] With the rapid development of society and economy, the consumption of human resources is becoming more and more serious. In order to deal with the problems caused by the shortage of resources, all countries have turned their attention to the resource-rich ocean. The development of seabed resources requires a series of marine tools, and submersibles are one of the key equipment in marine development equipment. Submersibles are widely used in marine activities such as ocean exploration, scientific investigation and military reconnaissance. The water hydraulic system is one of the important subsystems of the submersible. The water hydraulic transmission technology that directly uses natural seawater instead of hydraulic oil as the working medium has the ad...

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Problems solved by technology

[0004] However, most of the above-mentioned plunger pumps adopt an oil-water separation structure. The key friction pairs in the pump are lubricated by hydraulic oil, and the working medium is sea water. This structure has the risk of hydraulic oil leakage and pollution of the marine environment; on the other hand, these plungers The pumps are quantitative pumps, and the driving power of the pump is generally configured according to the power required for the maximum working pressure.

Limited by the driving power, it can only work with a small flow when the pressure is high, but it can only output a small flow when the pressure is low, which makes the working efficiency of the system low and is not conducive to potential Miniaturization of buoyancy adjustment system

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