A pre-fraction body press-fit jet tube servo valve
A technology of servo valves and jet tubes, applied in fluid pressure actuators, servo motor components, mechanical equipment, etc., can solve the problems of irreconcilable air gap symmetry and difficulty in ensuring welding quality, and avoid thread structure and power loss , Good air gap consistency, the effect of avoiding welding problems
Active Publication Date: 2018-11-30
BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS +1
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is to provide a pre-stage split body press-fit jet tube servo valve, the problem that the air gap symmetry cannot be adjusted and the welding quality is difficult to guarantee due to the integral welding of the torque motor; The adjustability of the spacing during the test process and the problem of nozzle welding; the power level adjusts the zero position by screwing the two ends of the two clamping screws inside the spool into the clamping feedback lever
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Embodiment Construction
[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0019] Such as figure 1 , 2 As shown, a pre-stage split body press-fit jet pipe servo valve of the present invention mainly includes two parts: a pre-stage part and a power stage part.
[0020] The pre-stage part is mainly composed of a torque motor assembly and a receiver assembly, and the lower end of the torque motor assembly is fixed to the upper end of the receiver assembly by screws.
[0021] The torque motor assembly includes an upper housing 12, an armature press-fit assembly, an upper magnet guide 10, and a lower magnet guide 11. The upper magnet guide 10 and the lower magnet guide 11 are assembled in the upper housing 12 through the torque motor mounting screws 4, and the lower The lower part of the magnetizer 11 is cushioned with an air gap adjusting gasket 5 to adjust the height of the upper magnetizer 10 and the lower magnetizer...
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The invention belongs to an electro-hydraulic servo valve, and particularly relates to a pre-stage split press-fit type jet pipe servo valve. The pre-stage split press-fit type jet pipe servo valve comprises a torque motor assembly, a receiver assembly and a power stage part; the torque motor assembly comprises an outer shell, an upper magnetic conductor, a lower magnetic conductor and an armature press-fit type assembly; the upper magnetic conductor and the lower magnetic conductor are fixed to the interior of the outer shell; the armature press-fit type assembly is positioned in the central axis of the upper magnetic conductor and the lower magnetic conductor, and the lower end of the armature press-fit type assembly penetrates through the bottom of the upper shell; the receiver assembly comprises a middle shell and a receiver which is positioned in the centre of the middle shell; and the power-stage part comprises a lower shell, a valve core which is positioned in a through cavity of the lower shell, two oil return throttling holes which are positioned at the lower end of the through cavity, and an oil filtering assembly which is fixed to the interior of a lower cavity. A torque motor air gap can be adjusted through an air gap adjusting gasket; the torque motor air gap consistency is good; the electro-hydraulic servo valve is not required to be disassembled and assembled during a debugging process; welding problems are avoided; and a threaded structure and power loss in the valve core are avoided.
Description
technical field [0001] The invention belongs to an electro-hydraulic servo valve, in particular to a pre-fraction body press-fitted jet tube servo valve. Background technique [0002] The two-stage jet tube servo valve usually consists of a pre-stage and a power stage two-stage hydraulic amplifier. The amplifier consists of a spool. The electrical-mechanical converter converts the low-power electrical signal into the deflection motion of the jet tube. The deflection of the high-speed jet passing through the nozzle increases the pressure in one cavity of the receiver and decreases the pressure in the other cavity, so that the pre-stage outputs a certain power control pressure. The control pressure difference pushes the spool of the power stage hydraulic amplifier to further amplify the hydraulic power, and its output is used to control the hydraulic actuator to drive the load. Usually inside the jet tube servo valve, there is a feedback device between the power stage and th...
Claims
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IPC IPC(8): F15B13/02
Inventor 韩旭张恒轩陈祖希王书铭
Owner BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS