GB843932A - Improvements in and relating to hydraulic control valves - Google Patents
Improvements in and relating to hydraulic control valvesInfo
- Publication number
- GB843932A GB843932A GB662656A GB662656A GB843932A GB 843932 A GB843932 A GB 843932A GB 662656 A GB662656 A GB 662656A GB 662656 A GB662656 A GB 662656A GB 843932 A GB843932 A GB 843932A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ports
- control
- port
- exhaust
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
- F16K11/0708—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides comprising means to avoid jamming of the slide or means to modify the flow
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Multiple-Way Valves (AREA)
Abstract
843,932. Piston valves. TURNBULL, D. E. Feb. 25, 1957 [March 2, 1956], No. 1626/56. Class 135. In an hydraulic control valve comprising a valve spool having at least three piston lands separated by stem portions and a valve sleeve having supply and exhaust ports of constant area and two control ports at which are produced hydrodynamic reaction forces acting in the same direction on the valve spool, the stem portion adjacent the exhaust port is so thick that the channel between this stem portion and the sleeve is small enough with respect to the control ports when fully open to produce within the sleeve adjacent the exhaust port an hydrodynamic force which substantially compensates the hydrodynamic forces at the control ports. As shown in Fig. 2 the valve spool 10 has piston portions 10a, 10b, 10c, 10d separated by stem portions 10e, 10f, 10g and the sleeve 11 has a supply port 11b exhaust ports 11a, 11c and control ports 11d, 11e. The stem portions 10e, 10g opposite both exhaust ports 11a, 11c are thickened. In a modification, the ports 11a, 11c are supply ports, and the port 11b is an exhaust port. In this case, the central stem portion 10f only is thickened. In a further modification for a single-acting hydraulic actuator, the spool has only three lands and the port 11c is omitted so that the control port 11e serves only for exit of hydraulic fluid and the control port 11d only for entry of such fluid to the valve sleeve. The reduced stem portions in all forms have a diameter at least equal to 80% of the internal diameter of the valve sleeve. The effective circumferential width of the supply, exhaust and control ports, or of each set of such ports is about half the circumference of the inner surface of the valve sleeve. The stem portion 10f opposite the inlet is preferably not thickened. In Fig. 5, the piston portions 10b, 10c are spaced so that the supply control port 11e as shown is open wider than the exhaust control port 11d. This arrangement results in a reduced hydrodynamic reaction forces on the valve due to flow through the control ports at least for small openings thereof. According to the Provisional Specification, the ports 11a, 11b, Fig. 3 (not shown), may be control ports and the ports 11d, 11e supply and exhaust ports respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB662656A GB843932A (en) | 1956-03-02 | 1956-03-02 | Improvements in and relating to hydraulic control valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB662656A GB843932A (en) | 1956-03-02 | 1956-03-02 | Improvements in and relating to hydraulic control valves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB843932A true GB843932A (en) | 1960-08-10 |
Family
ID=9817888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB662656A Expired GB843932A (en) | 1956-03-02 | 1956-03-02 | Improvements in and relating to hydraulic control valves |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB843932A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114235383A (en) * | 2021-12-21 | 2022-03-25 | 上海临港诺玛机电科技发展有限公司 | Valve core and valve sleeve precise combination machining detection tool and detection method |
-
1956
- 1956-03-02 GB GB662656A patent/GB843932A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114235383A (en) * | 2021-12-21 | 2022-03-25 | 上海临港诺玛机电科技发展有限公司 | Valve core and valve sleeve precise combination machining detection tool and detection method |
| CN114235383B (en) * | 2021-12-21 | 2024-05-31 | 上海临港诺玛机电科技发展有限公司 | Valve core and valve sleeve precise combination machining detection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB820797A (en) | Improvements in or relating to fluid valves | |
| GB1527931A (en) | Directional valve | |
| GB970616A (en) | Improvements in or relating to fluid-flow control valve assemblies | |
| GB1206028A (en) | Improvements relating to fluid control valves | |
| GB906238A (en) | Fluid control valves | |
| GB1182055A (en) | Fluid Flow Control Device | |
| GB907085A (en) | Fluid flow control valves | |
| GB843932A (en) | Improvements in and relating to hydraulic control valves | |
| GB1016727A (en) | Improvements in or relating to spool valves for controlling fluid flow | |
| GB911729A (en) | Improvements in or relating to hydraulic control valves | |
| GB980151A (en) | Improvements in fluid control valve assemblies | |
| GB786419A (en) | Improvements in and relating to hydraulic and gaseous fluid valves | |
| GB905572A (en) | Valves for controlling fluid flow | |
| GB1459764A (en) | Spool valves | |
| US2781996A (en) | Manually operable pneumatic valves | |
| GB608881A (en) | Improvements in or relating to hydraulic relief valves | |
| GB574179A (en) | Improvements in or relating to valves for use in fluid pressure systems | |
| GB953738A (en) | Control slide valve | |
| GB731332A (en) | Fluid flow control valves | |
| GB551137A (en) | Improvements relating to valve mechanisms | |
| GB882417A (en) | Improvements in steering mechanism | |
| GB914495A (en) | Improvements in and relating to valves for fluid pressure systems | |
| GB814643A (en) | Improvements relating to slide valves | |
| GB965428A (en) | Fluid control valves | |
| GB917071A (en) | Improvements in or relating to manifold fluid control valve assembly |