JPH02123473U

JPH02123473U -

Info

Publication number: JPH02123473U
Application number: JP3235989U
Authority: JP
Priority date: 1989-03-22
Filing date: 1989-03-22
Publication date: 1990-10-11

Description

[Brief explanation of drawings]

添付図面は、本考案によるロータリー式サーボ
弁の一実施例を示し、第１図は全体縦断面図、第
２図は第１図の−断面及び関連部を示す図、
第３図は各溝部の配置関係を主として示す第２図
の−断面図、第４図は圧力特性図である。符号の説明、１１……弁ハウジング、１１ａ…
…弁孔、１２……出力軸、１３……入力軸、２０
……スリーブ弁部材、２１……スリーブ溝部、２
２……スリーブランド部、２３……供給孔、２９
……スプリング、３０……ロータ弁部材、３１…
…ロータ溝部、５１……供給ポート、５２……排
出ポート、５３，５４……給排ポート、５５……
供給室、５６ａ，５６ｂ……可変絞り。 The accompanying drawings show an embodiment of the rotary servo valve according to the present invention, in which FIG. 1 is an overall longitudinal sectional view, FIG. 2 is a cross-sectional view of FIG. 1 and related parts,
FIG. 3 is a cross-sectional view taken from FIG. 2 mainly showing the arrangement of the grooves, and FIG. 4 is a pressure characteristic diagram. Explanation of symbols, 11...Valve housing, 11a...
... Valve hole, 12 ... Output shaft, 13 ... Input shaft, 20
... Sleeve valve member, 21 ... Sleeve groove portion, 2
2... Sleeve land part, 23... Supply hole, 29
... Spring, 30 ... Rotor valve member, 31 ...
...Rotor groove, 51... Supply port, 52... Discharge port, 53, 54... Supply/discharge port, 55...
Supply chamber, 56a, 56b...variable aperture.

Claims

[Scope of utility model registration request]

A sleeve valve member that is fitted into a valve hole of a valve housing and coupled to rotate together with either an input shaft or an output shaft, and a sleeve valve member that is coaxially and rotatably fitted to an inner circumferential surface of the sleeve valve member. and a rotor valve member coupled to rotate with either the input shaft or the output shaft, and the inner peripheral surface of the sleeve valve member is provided with a plurality of sleeve grooves having a predetermined length extending in the axial direction. A plurality of rotor grooves are arranged along the circumferential direction and have a predetermined length on the outer peripheral surface of the rotor valve member, and each of the sleeve grooves and the rotor groove corresponds to the sleeve land between the sleeve grooves. The working fluid supplied from the supply port provided in the valve housing is communicated with a part of the sleeve groove through a narrow slit-shaped variable throttle whose width changes according to the relative rotation of the valve member and the rotor valve member. Alternatively, the fluid is introduced into the rotor groove and flows through the variable throttle into the rotor groove or the sleeve groove located on both sides of the part of the groove in the circumferential direction, and then discharged from the discharge port and located on both sides of the groove. In a rotary servo valve in which a groove portion communicates with a pair of supply/discharge ports provided in the valve housing, the sleeve valve member is movable in the axial direction with respect to the rotor valve member and is moved toward one side in the axial direction by a spring. a supply chamber is formed inside the valve hole adjacent to the one side of the sleeve valve member, the supply port is opened in the supply chamber, and the supply chamber and the part of the groove are connected. A rotary servo valve, characterized in that a communicating supply hole is formed in the sleeve valve member.