Energy-saving rotary two-way balancing valve

Abstract

The invention provides an energy-saving rotary two-way balancing valve which is compact in structure and steady to operate and realizes energy conservation and consumption reduction. The energy-saving rotary two-way balancing valve comprises a valve body and a pair of valve spool components, a pair of symmetrical stepped valve cavities are formed in the valve body, a first oil port and a second oil port communicated with the valve cavities are respectively arranged on the end surface of the valve body, each valve cavity comprises a horizontal main hole, a main flow channel and a control flow channel, the first oil port is respectively communicated with the main flow channels and the control flow channels, the control flow channels, the main flow channels and the second oil ports are sequentially communicated with the main holes, the valve spool components are arranged in the main holes, and each valve spool component sequentially comprises an orifice plug, a valve rod, a spring, a valve seat, a spring seat, a pressure adjusting spring and a valve sleeve. By the aid of the hydraulic negative feedback principle, two sets of sequence valves and one-way valves with negative feedback are arranged in the valve body, so that a main engine can steadily work, and the balancing valve can function in saving energy and reducing consumption.

Description

technical field [0001] The invention relates to a hydraulic valve, in particular to a hydraulically driven rotary bidirectional balance valve used in an excavator system. Background technique [0002] At present, in the excavator hydraulic system, with different working conditions, the engine speed of the main engine varies in a large range, from several hundred to more than two thousand revolutions, so that the flow rate of the hydraulic system varies in a large range. When the speed is low and the flow rate is low, due to the low pressure and the mismatch with the brake pressure, it is easy to cause tremors during work, and the work is extremely unstable; the conventional technical measure is to add hydraulic components such as back pressure valves, sequence valves or relief valves to the circuit. , although it can solve the trembling problem, but when the engine speed increases and the flow rate increases, the system pressure rises sharply, and the pressure loss also incr...

AI Technical Summary

Problems solved by technology

However, in the control of the oil cylinder, the balance valve adopts the cross control of the relief valve and the oil inlet and return work at the same time. If the oil inlet and return actions of the oil cylinder are decomposed, when the oil is fed, the oil is only fed through the one-way valve; When oil is returned, due to the function of the overflow valve, the oil return has better overflow protection; overall, its reliability and stability are not good

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