Pressing force adjustment device for flow distribution pairs

Abstract

The invention relates to a pressing force adjustment device for flow distribution pairs. The pressing force adjustment device comprises a plunger tray, a flow distribution plate and a bearing device, and further comprises a pressing force adjustment assembly. The pressing force adjustment assembly is arranged on the flow distribution plate or the bearing device. Through the pressing force adjustment assembly installed in an installation hole, high-pressure oil can be led into the space between the plunger tray with relative rotation and the flow distribution plate or led into the space between the flow distribution plate and the bearing device; through leading-in of the high-pressure oil, a part of friction force of the flow distribution pairs can be counteracted, thus it can be guaranteed that on the premise of an appropriate redundant pressing force coefficient, friction force between the flow distribution plate and the plunger tray or friction force between the flow distribution plate and the bearing device is reduced, and occurrence of a plate burning phenomenon is avoided; meanwhile, leakage quantity increase caused by an excessive gap between the flow distribution pairs cannot happen, and volumetric efficiency is guaranteed.

Description

technical field [0001] The invention relates to the field of hydraulic technology, in particular to a pressing force adjusting device for a flow distribution pair of a plunger type hydraulic element. Background technique [0002] Plunger hydraulic components mainly include axial piston pumps (motors), floating cup hydraulic pumps (motors) and hydraulic transformers based on the former two. Tension coefficient design principles. The remaining pressing force coefficient has a great influence on the performance of the distribution pair. If the remaining pressing force coefficient is too large, the friction between the valve plate and the plunger cylinder will increase, the mechanical efficiency will decrease, and even "burning" will occur; if the remaining pressing force coefficient If the tightening force coefficient is too small, the matching gap between the valve plate and the plunger cylinder will be too large, resulting in increased leakage and reduced volumetric efficien...

AI Technical Summary

Problems solved by technology

The remaining pressing force coefficient has a great influence on the performance of the distribution pair. If the remaining pressing force coefficient is too large, the friction between the valve plate and the plunger cylinder will increase, the mechanical efficiency will decrease, and even "burning" will occur; if the remaining pressing force coefficient If the tightening force coefficient is too small, the matching gap between the valve plate and the plunger cylinder is too large, resulting in increased leakage and reduced volumetric efficiency

According to the current design method, the remaining pressing force coefficient depends on the structural dimensions such as the diameter of the plunger and the waist hole of the distribution plate. Therefore, after the radial piston pump and other components are finalized, the remaining pressing force coefficient cannot be changed, which seriously affects the flow distribution. The lubrication characteristics of the pair and the overall efficiency of components such as radial piston pumps

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