Energy recovery system for rotary motor

Abstract

The invention belongs to the technical field of hydraulic transmission, and particularly relates to an energy recovery system for a rotary motor. The energy recovery system comprises the rotary motor, a main pump, a main oil circuit, a main valve arranged on the main oil circuit, an energy accumulator and a rotary energy accumulation control valve arranged on an energy accumulation oil circuit, wherein the rotary energy accumulation control valve comprises a recovery link reversing valve and a release link reversing valve; the recovery link reversing valve is a three-position four-way reversing valve; the oil ports A6 and B6 of the recovery link reversing valve communicate with the oil ports A9 and B9 of the rotary motor through an oil supply pipeline; the oil outlet of the recovery link reversing valve communicates with the energy accumulator through the oil supply pipeline; the release link reversing valve is a three-position four-way reversing valve; the oil inlet of the release link reversing valve communicates with the energy accumulator through the oil supply pipeline; the oil ports A7 and B7 of the release link reversing valve communicate with the oil ports A9 and B9 of the rotary motor through the oil supply pipeline; and the energy accumulator is preferably a control valve and an oil make-up valve. The energy recovery system has the advantages of being simple and reliable in structure and avoiding air suction of the motor and pure hydraulic control.

Description

technical field [0001] The invention belongs to the technical field of hydraulic transmission, and in particular relates to an energy recovery system of a rotary motor. Background technique [0002] Some machines in the field of construction machinery have the function of turning on the car, and the turning on the car is generally realized by the rotation of the slewing support driven by the hydraulic motor. When the turning on the car is turned on, it needs energy supply, and the oil is delivered to the swing motor through the control of the main valve in the hydraulic system, and the swing motor converts the hydraulic energy of the oil into mechanical energy to realize the rotation; when the operator stops manipulating the mechanical rotation , the main valve is cut off, the rotary motor attenuates the inertial energy of the upper car rotation through its own overflow valve overflow, and the upper car rotation gradually stops. However, in the process of flood braking, a l...

AI Technical Summary

Problems solved by technology

However, the existing slewing energy storage system has a complex oil circuit structure, and most of them need to install electrical components in the hydraulic oil circuit for monitoring and control, which is high in cost and low in reliability.

[0004] In addition, adding an accumulator to the slewing brake system will increase the pressure of the relief valve of the slewing motor. When the motor stops, the relief valve will no longer overflow, and a large amount of oil will be stored in the accumulator in the form of high pressure. Therefore, there is no flow to replenish the M port of the motor, which may easily cause insufficient oil replenishment of the motor and cause air suction.

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