Open vibration valve with electric proportional control function and pressure compensation function and used for road roller

Abstract

The invention relates to an open vibration valve with the electric proportional control function and the pressure compensation function and used for a road roller. The open vibration valve is characterized in that a valve block is provided with a pressure compensation valve (1), a three-position four-way electric proportional valve (2), a shuttle valve (3), a two-position two-way reversing valve (4), a variable throttling valve (5), a throttling orifice (6) and a one-way valve (7), an opening P, an opening T, an opening TT, an opening A and an opening B are formed in the valve block, the opening P serves as an oil inlet of the valve block, and is connected with an outlet of a gear pump, the opening T serves as an oil return opening of the valve block, the opening TT serves as an oil return opening of the pressure compensation valve (1), the opening A is connected with an oil inlet of a vibrating motor, and the opening B is connected with an oil outlet of the vibrating motor. According to the open vibration valve with the electric proportional control function and the pressure compensation function and used for the road roller, the reversing unloading function of a common vibration valve can be achieved, stepless speed adjustment can be achieved, an open system can have speed adjusting performance similar to speed adjusting performance of a closed system, and speed frequency management of the open system can be achieved.

Description

technical field [0001] The invention relates to an open vibration valve of a road roller, in particular to an open vibration hydraulic system of a road roller. Background technique [0002] At present, the valve control system is used in the open vibration of the road roller. The vibration valve is the core control element of the system. Its main function is to realize the start and stop vibration (working, unloading) and large and small vibration (forward and reverse). [0003] At present, the main body of the conventional vibration valve is: a small flow system usually uses a combination of a three-position four-way valve electromagnetic reversing valve and a safety valve; [0004] Large flow systems usually use a three-position four-way electromagnetic reversing valve as the pilot control valve, and a set of three-position four-way hydraulic control valves as the main control valve; [0005] Or use several groups of cartridge valves with logical relationship as the main ...

AI Technical Summary

Problems solved by technology

[0006] The control solenoid valves of the above types of valves are generally only the output of the switching value, so they only have the function of reversing, and cannot realize the speed regulation function, and at the same time cannot realize the stepless speed regulation of the vibration system (frequency conversion control technology) and volumetric efficiency loss. Compensation; that is, the function of a closed vibration system cannot be realized

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