Hydraulic transformer of broad voltage regulation range

Abstract

The invention publicizes a kind of hydraulic transformer for extending voltage-regulating range. The main shaft and center shaft intersects into obliquid shaft structure. One end of the center shaft is connected with the main-shaft, the other end is fixed in the center hole of vessel. The shaft plug and the connecting rod are connected by ball-hinge, the other end of the connectnig rid connected with the main shaft by ball hinge, and the other end of shaft-plug is laid in the shaft-plug cavity of vessel, distributing flow disc is fixed between the vessel and the back-end lid by controlling the rotating angle of the distributing flow disc and controlling the flow quantity of three oil exits of the distributing flow disc, it controls the pressure proportion of input and output. Using the special distributnig flow disc, and back-end lid structure, it resolves the damage of oil liquid throttle, enlarges the proportion range of the pressure transforming, to a greast extent, it embodies the pressure-transforming function, recycling load function, energy-saving function. In order to measure the rotating angle of the distributing flow disc, there is a angle transmission shaft.

Description

technical field [0001] The invention relates to hydraulic components, in particular to a hydraulic transformer with widened voltage regulation range. Background technique [0002] The constant pressure network secondary regulation technology developed in recent years has improved the flexibility and efficiency of the hydraulic system. However, although there are many advantages in the principle of secondary regulation, its application in the hydraulic field has been limited to a certain extent. In terms of driving the rotating load, the driving of the rotating load can be realized by adjusting the adjusting mechanism of the variable hydraulic motor. There is no good solution for driving linear loads with different load pressure requirements. Hydraulic transformers are developed under this technical background. [0003] In the patent WO 97 / 31185, a new hydraulic transformer design concept is proposed. Compared with the traditional hydraulic transformer, this type of transf...

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Problems solved by technology

In this patent, only the relationship between the valve plate and the cylinder block is considered, but the influence of the valve plate and the rear end cover on the performance of the hydraulic transformer is not considered.

[0008] In this patent, in the hydraulic transformer, the shape of the waist-shaped groove of the valve plate is consistent with that of the interface of the rear end cover. , The oil flow area between the T interface gradually decreases, the oil throttling loss between the distribution plate and the rear end cover increases, and the energy-saving effect of the transformer decreases; when the rotation angle of the distribution plate increases to a certain value, there will be Make the A slot of the distribution plate communicate with the T port of the rear end cover, the B slot and the A port, and the T slot and the B port, resulting in the loss of the function of the transformer

Therefore, the hydraulic transformer designed according to this patent has the problem of small transformer voltage regulation ratio and high noise during operation.

[0009] In the patents WO 99 / 40318 and WO 00 / 28211, the structure of the hydraulic transformer is improved, and the high-pressure port on the front face of the distribution plate is led to the center of the rear end face of the distribution plate, and the positions of the other two slots remain unchanged. At the same time, the notch of the rear end cover has also been adjusted accordingly, and the voltage regulation ratio range of the hydraulic transformer has been improved, but it is still very limited, and there is an energy loss of oil between the rear end cover and the distribution plate

In this patent, the four notches of the rear end cover are respectively connected to the two load oil circuits and the low-pressure oil circuit through the reversing valve, which increases the complexity of the hydraulic transformer structure

At the same time, in order to prevent the inclination of the valve plate, a rolling bearing with a larger radial dimension is used, which increases the volume of the hydraulic transformer

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