DISTRIBUTION VALVE AND METHOD OF ASSEMBLY THEREOF Russian patent published in 2008 - IPC F15B13/02 

FIELD: mechanics.

SUBSTANCE: device and method are intended for hydraulic control devices operated at higher vibration and impact loads. The proposed device comprises a body with a slide valve with a stem furnished with a flat and axial slit-like slots separated by webs arranged in the slide valve opposite the intake orifices, a slide valve turn limiter, an expanding ring with opening equal to H and receiving the expanding ring retainer representing a screw. The screw head diameter D is defined by the formula D<H, the expanding ring end faces being furnished with the chamfers. The proposed method includes passing the body wall through the expanding ring opening and fitting one end of the aforesaid ring into the body inner part and the other one into the circular groove, scrolling the ring against the stop in the circular groove and till one its end gets aligned with the body slot edge. It also comprises setting the cylindrical segment on the said body slot edge till its free end thrusts against the groove, fitting into the slide valve body and locking by moving the said segment along the body slot edge and slide valve flat till it thrusts against the expanding ring. Now the aforesaid ring is scrolled till its opening gets into the position opposite to the aforesaid segment. Prior to the aforementioned operations, a threaded hole is made in the slide valve body, in the plane crossing the circular groove and flats are made of the expanding ring end faces. The opening fitted in the aforesaid position, a screw is fitted into the aforesaid threaded hole so that its head is arranged between the ring end faces. Now the screw is locked relative to the slide valve body.

EFFECT: higher reliability of assembly, vibration and impact resistance.

2 cl, 2 dwg