Variable displacement opposed plunger pump and variable displacement calculation method thereof

Abstract

The invention provides a variable displacement opposed plunger pump and a variable displacement calculation method thereof, the structure of the plunger pump is optimized, a variable displacement adjusting mechanism used for driving an opposed plunger assembly is arranged, and the maximum displacement between a male plunger and a female plunger driven by a gear set with a ratchet mechanism and a gear set without a ratchet mechanism is determined respectively. The relation between the displacement of the opposed plunger pump and the number of ratchet wheels and ratchets in a ratchet mechanism is determined according to the relation between the rotation number of the ratchet wheels and the ratchets in the ratchet mechanism and the phase difference between the male plunger and the female plunger. High-precision adjustment requirements with different requirements for displacement under different working conditions are met, self-adaptive adjustment of the volume of an inner cavity of a plunger in the pump body assembly is achieved, the flow and flow speed of lubricating oil are adjusted according to the actual working conditions, energy distribution of power equipment is optimized, mechanical loss is reduced, and the service life of the pump body assembly is prolonged. And therefore, the use reliability and the environmental adaptability of hydraulic equipment are improved.

Description

technical field [0001] The invention belongs to the technical field of plunger pumps, and in particular relates to a variable displacement opposed type plunger pump and a variable displacement calculation method thereof. Background technique [0002] In harsh environments such as high cold and high temperature, the diesel engine has high reliability. At present, it is still the mainstream form of special power equipment power system. However, the global oil resource crisis is severe, and my country's dependence on oil imports has exceeded 70%, which directly threatens national energy security. The key to solving the problem is to open source and reduce expenditure. "Open source" increases fuel supply, which is difficult to achieve in the short term; "throttle" reduces energy loss, which is the most feasible and effective. Mechanical loss is one of the main energy losses of diesel engines, and 70% of its losses are directly related to the lubrication system. The oil press...

AI Technical Summary

Problems solved by technology

However, it requires high oil cleanliness, many parts, high manufacturing precision, and easy wear of the blades; the cost of vane variable displacement pumps is about 50%-75% higher than that of fixed displacement pumps; and it has certain pressure pulsation and response Hysteresis

Traditional plunger pumps have the same advantages as vane pumps, but the variable adjustment of their displacement is more complicated, which directly leads to higher costs

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