Hydraulic transformer with safety device

Abstract

The invention relates to a hydraulic transformer with a safety device. The hydraulic transformer uses a cylinder block type plunger pump as design basis, and changes the position of a plunger chamber corresponding to three oil chambers in the oil absorption and drainage processes by a valve plate, thus changing notch flow to compensate flow difference between a high pressure oil end and a low pressure oil end, and ultimately realizing self-rotary motion and energy output. The novel hydraulic transformer and a safety valve assembly thereof are designed; the novel hydraulic transformer is of spherical design of a cylinder block and the valve plate, and central cylinder body shaft supporting and hydrostatic bearing valve plate design, which greatly reduces volume and weight of the hydraulic transformer, solves the problem of oil throttling loss between the valve plate and a rear end cover, expands voltage regulation percentage range of the hydraulic transformer, and can cause the hydraulic transformer to rotate within a wide angle range in both normal and reverse directions, thus maximizing voltage regulation functions, recovery load functions and energy-saving functions of the hydraulic transformers, and reducing noises of the hydraulic transformers.

Description

technical field [0001] The invention belongs to the technical field of hydraulic transformers, in particular to a hydraulic transformer with a safety device. Background technique [0002] The traditional hydraulic transformer is composed of two types of hydraulic transformers: a hydraulic cylinder type with a constant transformation ratio and a hydraulic motor / pump type with an adjustable transformation ratio. The former is a structure in which the piston rods of two single-rod hydraulic cylinders are rigidly connected together. Since the effective area of ​​the pistons on both sides is different, the pressures in the oil chambers on both sides are different, so that the variable pressure is realized. Its characteristic is that the transformation ratio is a fixed value, and it is generally used as a booster device. The latter is usually referred to as the traditional hydraulic transformer. The research on it is more in-depth, and it is mainly reflected in the research and a...

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Problems solved by technology

In 2004, Ouyang Xiaoping analyzed that the cause of the narrow voltage regulation range of the hydraulic transformer was the mismatch between the shape and position of the kidney-shaped port of the valve plate and the oil groove of the corresponding rear end cover.

However, the port matching between the distribution plate, the cylinder body and the end cover is not perfect, resulting in pressure fluctuations and noise. In the structural design, we must strive to overcome this defect; adjusting the transformation ratio of the hydraulic transformer is mainly manual control, and there is no connection Safety valve to control regulating pressure

In addition, when the hydraulic transformer is applied to drive multiple loads simultaneously in the constant voltage network, the analysis of the pressure coupling phenomenon between the loads has not been reported in the relevant materials.

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