Piezoelectric plate driving nozzle baffle disc pressure servo valve with main valve element hydrodynamic force compensation function

A technology for driving nozzles and hydraulic power, applied in servo motor components, fluid pressure actuation devices, fluid pressure actuation system components, etc., can solve the problems of small displacement of piezoelectric plates and difficult large flow valve actuation mechanism, etc., to achieve Good linearity, avoid complex and compact structure

Active Publication Date: 2020-02-18
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the displacement of the piezoelectric sheet is small, so it is not easy to be used as an actuating mechanism for a large flow valve

Method used

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  • Piezoelectric plate driving nozzle baffle disc pressure servo valve with main valve element hydrodynamic force compensation function
  • Piezoelectric plate driving nozzle baffle disc pressure servo valve with main valve element hydrodynamic force compensation function
  • Piezoelectric plate driving nozzle baffle disc pressure servo valve with main valve element hydrodynamic force compensation function

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Embodiment Construction

[0041] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0042] This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, components are exaggerated for clarity.

[0043] Such as figure 1 As shown, the present invention discloses a piezoelectric ring driven nozzle retainer pressure servo valve with hydrodynamic compensation of the main spool, including an upper casing, an adjustment assembly, a first nozzle, a second nozzle, a lower casing, and a spool , the first return spring, the second return spring, the oil filter, the first shuttle valve and the second shuttle valve;

[0044] The adjustment assembly includes a fixed cylinder, N annular pi...

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Abstract

The invention discloses a piezoelectric plate driving nozzle baffle disc pressure servo valve with a main valve element hydrodynamic force compensation function. The piezoelectric plate driving nozzlebaffle disc pressure servo valve comprises an upper shell, an adjusting assembly, a first nozzle, a second nozzle, a lower shell, a valve element, a first reset spring, a second reset spring, an oilfilter, a first shuttle valve and a second shuttle valve. Piezoelectric plate driving baffle discs are utilized to substitute an original torque motor electric-mechanical mode to avoid the defects that a traditional torque motor is complex in composition, high in mounting requirement, poor in reliability and the like, the baffle discs are used for substituting baffles, occurrence of high-frequencyfluttering and howling of thin and long metal plates is avoided, system stability is improved, and the size and the weight of a servo valve body are also decreased advantageously to a certain extent;and meanwhile, endurance of piezoelectric plate driving to severe environments such as high-temperature and high-magnetic-field interference is higher than that of the torque motor, steady-state hydrodynamic force changed with change of the opening degree and the loading pressure during valve element moving can be compensated greatly, and the obvious effect on improvement of static accuracy of the pressure servo valve is achieved.

Description

technical field [0001] The invention relates to an aircraft electro-hydraulic servo control element, in particular to a pressure servo valve driven by a piezoelectric sheet with a hydraulic power compensation of a main valve core to drive a nozzle retainer plate. Background technique [0002] The electro-hydraulic servo valve realizes the conversion and precise control of electric and hydraulic signals through hydraulic technology and automatic control technology. It is the core component of the electro-hydraulic servo control system, and its performance directly affects and determines the performance of the entire control system. Due to its fast response, good linearity, and compact structure, the double nozzle baffle servo valve has good static and dynamic characteristics, and is most widely used in the industrial field. However, the torque motor of the dual-nozzle baffle servo valve has a complex structure and is prone to vibration and howling, which seriously affects its...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02F15B21/041
CPCF15B13/02F15B21/041
Inventor 王彬朱有坤
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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