Rotatary brake valve
A technology of rotary brake and valve body, which is applied in the direction of fluid pressure actuating device, servo motor assembly, mechanical equipment, etc., can solve problems such as large volume, achieve good rotary stability, prevent air suction, and be easy to manufacture and use. Effect
Inactive Publication Date: 2007-12-26
YUZHOU HYDRAULIC EQUIP FACTORY
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Problems solved by technology
It is characterized in that it is also equipped with a recovery and regeneration circuit for the braking energy of the turntable, the accumulator is connected in parallel with the rotary oil motor, and a hydraulic control check valve is connected in series between the accumulator and the oil pipeline of the rotary oil motor, and the accumulator A hydraulic control check valve is connected in series with the oil pipeline of the rotary oil motor, the control oil circuit of the hydraulic control check valve is connected in parallel with the control oil circuit of the hydraulic reversing valve, and the control oil circuit of the hydraulic control check valve is connected with the hydraulic reversing valve. The control oil circuit of the valve is connected in parallel, and the unloading valve is connected in parallel with the two oil pipelines of the hydraulic reversing valve. A hydraulically controlled one-way valve is connected in series, and a hydraulically controlled one-way valve is connected in series between the oil delivery pipeline of the hydraulic reversing valve and the oil delivery pipeline of the rotary oil motor. When the turntable is started, the energy recovered by the release of the accumulator is initially driven independently and the oil pump is unloaded. When the pressure of the accumulator drops below the set pressure of the unloading valve, the oil pump and the accumulator Driven together, the test proves that the system can save energy by 30%, but its disadvantages are: the volume is relatively large, and the stability of the rotation needs to be further improved
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[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0017] As shown in Figure 1, a rotary brake valve includes a valve body 11 and check valves 1, 2, 7, 8 installed in the valve body. The key point of the invention is that the valve body 11 is formed with Connect the motor ports MA, MB, external oil ports VA, VB and oil return port T of the motor. From the external oil port VA to the motor port MA and the oil return port T, there are forward check valve 2 and reverse connection respectively. There is a one-way valve 1, and a relief valve 4 with a pilot valve 3 is connected between the motor port MA and the oil return port T, wherein the small hole N3 in the spring chamber that controls the action of the pilot valve 3 communicates with the small hole N2 on the oil port VB; A check valve 8 is connected in the forward direction and a check valve 7 is connected in the reverse direction between the ...
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This invention relates to a rotary brake valve characterizing in molding motor mouths MA and MB connecting a motor, external oil orifices VA and VB and a return one T, installing single-way valves of positive and negative among VA, MA and T, in which an overflow valve with a pilot valve is set between MA and T, a small hole N3 of a spring cavity of the pilot valve is connected with the upper hole of VB, single-way valves are set among VB, MB and T positively and negatively, an overflow valve with a pilot valve is set between motor orifice MB and return orifice T, and small hole N4 of the spring cavity of the pilot valve is connected with the upper small hole of VA.
Description
technical field [0001] The invention relates to a rotary brake valve. Background technique [0002] The slewing brake valve is a commonly used valve in hydraulic technology, and is widely used in the control of the slewing action of engineering machinery vehicles such as truck cranes and crawler cranes. For example, the Chinese patent application number CN90216151. "Hydraulic excavator slewing system that recovers braking energy", the system is equipped with a slewing oil motor that drives the slewing table, a hydraulic reversing valve that controls the rotation direction of the slewing oil motor, and a slewing oil pump and prime mover that provide power to the system. It is characterized in that it is also equipped with a recovery and regeneration circuit for the braking energy of the turntable, the accumulator is connected in parallel with the rotary oil motor, and a hydraulic control check valve is connected in series between the accumulator and the oil pipeline of the ro...
Claims
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IPC IPC(8): F15B13/02
Inventor 刘富良李新
Owner YUZHOU HYDRAULIC EQUIP FACTORY