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Cartridge 2D servo valve with temperature compensated damping piston

A damping piston and temperature compensation technology, applied in servo motor components, valve operation/release devices, multi-way valves, etc., can solve problems such as damping reduction, and achieve increased stability, high power density ratio, and high application integration Effect

Active Publication Date: 2019-10-11
杭州迪微电液数控技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, viscous damping is closely related to temperature. As the temperature increases, the viscosity coefficient will drop sharply, and the damping will also decrease.

Method used

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  • Cartridge 2D servo valve with temperature compensated damping piston
  • Cartridge 2D servo valve with temperature compensated damping piston
  • Cartridge 2D servo valve with temperature compensated damping piston

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with the accompanying drawings.

[0040] refer to Figure 1 to Figure 9 , a cartridge-type two-dimensional (2D) servo valve with a temperature-compensated damping piston, including a valve body module, an electro-mechanical converter module, and a position sensor module.

[0041] The valve body module includes a valve core 30, a valve sleeve 29, a damping piston 31, a valve sleeve pin 1, a left end cover 2, a filter screen 4, and a connecting plate 9; the electro-mechanical converter module adopts a torque motor, including a housing 11 and an armature 14 , permanent magnet 15, magnetizer 16, clip 19, motor cover 18, coil 22, motor pin 24, spring 25, spring rod 26, spring seat 12, limit rod 27, headless screw 32; the displacement sensor module includes LVDT Connecting rod 21, LVDT (composed of iron core 33 and coil frame 34) 20, meanwhile, the plug-in two-dimensional (2D) servo valve also includes O-ri...

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Abstract

A cartridge type two-dimensional servo valve with a temperature compensation type damping piston comprises a valve body module, an electric-mechanical converter module and a position sensor module. The valve body module comprises a two-dimensional valve composed of a valve element and a valve sleeve, and the valve element is rotatably placed in a hole in the valve sleeve in an axially sliding mode. The valve element 30 is provided with five shoulders, the right end of the valve sleeve is connected with the electric-mechanical converter module through a connecting plate, the valve element is fixedly connected with an armature, and the right end of the valve element is connected with the electric-mechanical converter module through the armature. The damping piston is arranged on the right surface of the fourth shoulder, and a damping cavity f is organically formed by the left side of the damping piston, the valve sleeve and the valve element in an enclosed mode. The right side of the damping piston is exposed to a high pressure hole b. A gap is formed between the damping piston and the valve sleeve. A torque motor is adopted for the electric-mechanical converter module, one end of aspring is connected with a spring rod, and the other end of the spring is connected with a spring seat fixed to an outer shell. The displacement sensor module comprises an LVDT connecting rod and an LVDT sensor.

Description

technical field [0001] The invention belongs to an electro-hydraulic servo valve in the field of fluid transmission and control, and in particular designs a plug-in two-dimensional (2D) servo valve with a temperature-compensated damping piston. Background technique [0002] Compared with hydraulic valves with other connection methods, cartridge valves have many irreplaceable advantages such as reliable sealing, light weight, easy system integration, and relatively easy processing and modification. So it is an important development direction of hydraulic technology. [0003] The electro-hydraulic servo valve is mainly a multi-stage valve structure. Generally, a nozzle flapper valve with good dynamic response and a jet pipe valve are used as the pilot valve, and a slide valve is used as the main valve. A feedback lever is used between the pilot valve and the main valve. Implement inter-level feedback. Since its pilot stage and power stage are placed in parallel, plug-in is n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B13/02F16K11/078F16K31/06F16K31/04F16K31/124F16K31/64
Inventor 阮健何晋飞鲁鹏勇赵建涛刘奎孟彬
Owner 杭州迪微电液数控技术有限公司
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