Deflecting plates jet servo valve based on increasing material manufacturing valve body structure
Technical field
The invention belongs to Hydraulic Servo Control Technologies, and in particular to the deflecting plates jet stream based on increasing material manufacturing valve body structure is watched
Take valve.
Background technique
Electrohydraulic servo valve is the important composition of servo-control system as a kind of typical conversion, amplification and control element
Part.Deflecting plates servo valve replaces Dual Injector Baffle hydraulic amplifier using deflected jet amplifier, compared to traditional spray
Mouth-baffle-type electrohydraulic servo valve has the advantages such as high reliability, high-performance, small in size, light-weight, is widely used in flying greatly
Many aerospace fields such as machine, carrier rocket.Since servo valve valve inner oil circuit is complicated, typical deflecting plates jet stream servo
Valve body oil circuit is linked up, and is needed from valve outer wall cross borehole, and is beaten plug in valve outer wall and guaranteed sealing, and cumbersome block up is needed
Head press fitting link, adjustment low efficiency, and have the risk of plug seal failure.Meanwhile typical deflecting plates jet servo valve valve
Body is separated with upper housing and fluidic module positioning pin, and fluidic module and upper housing are sliding fits, and relative position is difficult to accurately
Control is easy rotation, there is the risk for generating zero bias.
Summary of the invention
The technical problem to be solved in the present invention:
The present invention utilizes the advantage of increases material manufacturing technology free forming, solves valve body outside need and beats plug, adjustment effect
The problems such as rate is low, there are plug seal failure risks, meanwhile, valve body and fluidic module upper housing, positioning pin design are integrated,
Solve that upper and lower jet stream cover board positioning accuracy is low, is easy to produce the problems such as zero bias, to improve the reliable of electrohydraulic servo valve product
Property.
Technical solution of the present invention:
Deflecting plates jet stream electrohydraulic servo valve proposed by the present invention based on increasing material manufacturing valve body structure, including valve body, valve pocket,
Spool, torque-motor component, fluidic module, valve inner install valve pocket, spool are installed inside valve pocket, and spool is installed at spool both ends
Plug is limited, and valve body left and right ends are connected by screw to end cap, and torque-motor component is mounted on valve body upper end by screw
Face changes spool pressure at both sides, drives valve core movement and form feedback, fluidic module and valve body for driving prestage to move
Sliding fit installation inside middle upper housing, and by positioning finger setting in valve body, it is characterised in that: it is based on increases material manufacturing technology, it will
Valve body is integrated with fluidic module upper housing, positioning pin design.
Beneficial effects of the present invention:
Deflecting plates jet stream electrohydraulic servo valve proposed by the present invention based on increasing material manufacturing valve body structure, do not need to plug into
Row press fitting, reduces resetting difficulty, improves adjustment efficiency, avoids plug failure bring oil liquid leakage risk, improves
Product reliability;Valve body that the present invention designs, upper housing, positioning pin integral structure, do not need individually to assemble upper housing, improve
Fluidic module positioning accuracy improves the zero stability of deflecting plates jet servo valve.
Detailed description of the invention
Fig. 1 is increasing material manufacturing valve body structure schematic diagram,
Fig. 2 is the deflecting plates jet stream electrohydraulic servo valve structural schematic diagram based on increasing material manufacturing valve body structure,
Fig. 3 is the deflecting plates jet stream electrohydraulic servo valve structural schematic diagram based on increasing material manufacturing valve body structure.
Number explanation: 1- outer cover, 2- torque-motor component, 3- fluidic module, 4- valve body, 5- valve pocket, 6- valve core plug, 7-
Spool, 8- end cap, 9- protection board 10- oil filter component, 4-1- valve body, 4-2- upper housing, 4-3- positioning pin.
Specific embodiment
Deflecting plates jet stream electrohydraulic servo valve based on increasing material manufacturing valve body structure mainly includes valve body (4), valve pocket (5), valve
Core (7), torque-motor component (2), fluidic module (3) part;Valve pocket (5) are installed inside valve body (4), are equipped with inside valve pocket (5)
Spool (7), spool (7) both ends installation valve core plug (6) are limited, and valve body (4) left and right ends are connected by screw to end cap
(8), torque-motor component (2) is installed on valve body (4) upper surface by screw, for driving prestage to move, changes spool two
Lateral pressure drives valve core movement and forms feedback;Sliding fit is installed inside upper housing in fluidic module (3) and valve body (4), and is led to
It crosses and positions finger setting in valve body (4);Outer cover (1) is installed on valve body (4), for protecting torque motor sub-assembly (2), valve body (4)
Bottom surface is equipped with protection board (9), prevents from polluting;Oil filter component (10), which is connected through a screw thread, to be mounted on above valve body oil inlet, is used for
Filtering enters the oil liquid of jet stream grade receiving cavity, improves oil cleanliness.
On the basis of above structure, outer cover is also equipped on valve body, for protecting torque motor sub-assembly.
On the basis of above structure, valve body bottom surface is equipped with protection board, prevents from polluting.
On the basis of above structure, oil filter component, which is connected through a screw thread, to be mounted on above valve body oil inlet, for filtering
Into the oil liquid of jet stream grade receiving cavity, oil cleanliness is improved.
Deflecting plates jet servo valve proposed by the present invention based on increasing material manufacturing valve body structure, valve body utilize increasing material manufacturing skill
The advantage of art, can break through the limitation that cross borehole mode designs oil circuit, oil circuit in valve inner free forming, regardless of
Outside sealing avoids cumbersome plug press fitting link, reduces the resetting difficulty of deflecting plates jet servo valve, avoid plug
Failure risk caused by failure.Meanwhile being integrated valve body and upper housing, the design of fluidic module positioning pin, improve jet stream up and down
Cover board positioning accuracy reduces adjustment process, helps to improve the zero stability of deflecting plates jet servo valve, substantially increases partially
Rotating plate jet servo valve reliability.