Piston-type pneumatic proportional pressure reducing valve of ball screw driven by servo motor directly

A servo motor, ball screw technology, applied in valve details, safety valves, balance valves, etc., can solve the problems of poor oil and water pollution, poor linearity, insensitivity, etc., achieve precise adjustment, improve dynamic performance, The effect of high transmission efficiency

Inactive Publication Date: 2014-07-16
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional electrical proportional pressure valves currently used in industrial practice often use specially designed DC proportional electromagnets to adjust the valve output pressure. This traditional proportional valve has high cos

Method used

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  • Piston-type pneumatic proportional pressure reducing valve of ball screw driven by servo motor directly

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Embodiment Construction

[0011] The present invention will be further described in detail with the accompanying drawings.

[0012] Referring to the accompanying drawings, a piston-type pneumatic proportional pressure reducing valve with a servo motor directly driving a ball screw includes a casing 8, the servo motor 1 is fixed on the upper end cover 3 connected to the top of the casing 8, and the output shaft of the servo motor 1 is connected to the planetary reducer. The sun gear 2 is connected by the first key 31, the planetary gear 4 of the planetary reducer is connected with the transmission block 10 through the shaft sleeve 5 and the pin 6, and drives the transmission block 10 to rotate. The outer ring and inner ring of the tapered roller bearing 7 are respectively composed of The ring gear 30 and the transmission block 10 are positioned. The outer and inner rings of the deep groove ball bearing 28 are positioned by the upper valve body 12 and the transmission block 10 respectively. The upper valv...

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Abstract

The invention provides a piston-type pneumatic proportional pressure reducing valve of a ball screw driven by a servo motor directly. An output shaft of the servo motor is in clearance fit with a sun gear of a planetary reducer, a planet gear of the planetary reducer is connected with a transmission block, the lower end of the transmission block is connected with the ball screw, the ball screw is matched with a lead screw nut, the lower portion of the lead screw nut is connected with a pressure adjusting spring, the lower end of the pressure adjusting spring is connected with a piston, an air inlet and an air outlet are formed in the two sides of a lower valve body, an air feedback hole is formed in the lower valve body, the outer portion of a valve element is connected with a reset spring, and the valve element, the reset spring and a lower end cover are connected in a sealed mode. The servo motor directly drives the lead screw nut to compress the springs so as to achieve linear motion of the valve element, the structure is compact, transmission is stable, and dynamic control can be achieved.

Description

technical field [0001] The invention belongs to the technical field of pneumatic proportional pressure reducing valves, in particular to a piston type pneumatic proportional pressure reducing valve with a servo motor directly driving a ball screw. Background technique [0002] The pressure reducing valve is a pressure control valve that changes the throttling area to generate a pressure drop when the fluid passes through, reduces the inlet pressure to a required outlet pressure, and relies on the energy of the medium itself to keep the outlet pressure automatically stable. The traditional pressure reducing valve can be divided into three types: fixed value, fixed ratio and fixed difference according to the control pressure. They are all mechanical manual pressure regulating valves, and the regulating accuracy is not high enough. For example, the pressure change range of the direct-acting spring film piston pressure reducing valve is generally about 15%-20%, and the pressure...

Claims

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Application Information

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IPC IPC(8): F16K31/04F16K31/50F16K17/20F16K37/00
CPCF16K31/047F16K31/50F16K37/0091
Inventor 赵升吨金立波李靖祥张宗元
Owner XI AN JIAOTONG UNIV
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