CN104806595A - Direct-acting type load control valve used for integrating overflowing function into main valve core - Google Patents
Direct-acting type load control valve used for integrating overflowing function into main valve core Download PDFInfo
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- CN104806595A CN104806595A CN201510207823.6A CN201510207823A CN104806595A CN 104806595 A CN104806595 A CN 104806595A CN 201510207823 A CN201510207823 A CN 201510207823A CN 104806595 A CN104806595 A CN 104806595A
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- control
- valve
- valve body
- control valve
- left end
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- 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
Abstract
The invention discloses a direct-acting type load control valve used for integrating an overflowing function into a main valve core. The valve comprises a spiral block, a control piston, a push rod, a valve sleeve spring, the main valve core, a valve sleeve, a control valve left end cover, a control valve spring, a control valve core, a control valve body, a control valve push rod, a control valve push rod spring, a valve body, an overflowing ball valve core, an overflowing piston, a main valve spring, a main valve spring sleeve and a pretightening force adjusting bolt. According to the invention, a control oil circuit is simplified and is integrated into a control module, so that the processing technological requirement of the control oil circuit is reduced; the control oil circuit is improved from the principle, so that the pilot ratio is improved, and the control pressure required when a load is released is reduced; the overflowing function which is completed by a single valve core is integrated into the main valve core to reduce the number of valve parts, the size of the valve body is smaller, and the structure is more compact.
Description
Technical field
The present invention relates to hydraulic control component, especially relate to a kind of direct-acting type load control valve relief function being integrated in main valve plug.
Background technique
Load control valve and equilibrium valve are that a kind of specialized designs is for controlling the hydrovalve of the hydraulic fluid flow rate in the dirty oil return source of loading condition.Negative load or title Exceed load, refer to the situation that load force direction is identical with load movement direction, often there will be in engineering hydraulic pressure and vibration hydraulic system.This kind of hydrovalve also needs the function with overflow, usually to ensure that hydraulic actuator is not damaged by high pressure in addition.
In Exceed load situation, the flow of load control valve needs to be controlled by load control valve oil circuit control, when being applied to high-pressure system, in order to make motion as far as possible steadily, usually needs complicated net control to reduce or eliminate the impact vibrated and bring; In addition, traditional direct-acting type load control valve arranges independent relief valve usually to realize relief function.These arrange and have all occupied valve space limited, and add difficulty of processing.
In order to realize power conservation requirement in high voltage control, need to increase pilot ratio to reduce the pilot pressure controlled required for same induced pressure, therefore above-mentioned 2 are caused the loss in valve inner space that the pilot pressure of needs also can be caused to increase as far as possible.
In view of this, application new principle, new method, carry out principle and simplification functionally to the oil circuit control of load control valve, propose a kind of large pilot ratio, the direct-acting type load control valve be integrated in by relief function on main valve plug has important engineering significance.
Summary of the invention
Many in order to overcome in background technique the part be present in traditional direct-acting type load control valve, complex structure, pilot pressure requires high deficiency, the object of the present invention is to provide a kind of direct-acting type load control valve relief function being integrated in main valve plug, simplify net control, non-return valve function is integrated in valve pocket, relief function is integrated in the direct-acting type load control valve of main valve plug, this valve has carried out the improvement in structure and principle to net control in conventional load control valve, improve pilot ratio, the relief function completed by an independent spool is integrated on main valve plug and reduces valve number of components, make valve body long-pending less, more compact structure.
The technical solution used in the present invention is:
The present invention includes spiral shell resistance, control piston, push rod, valve pocket spring, main valve plug, valve pocket, control valve left end cap, control valve spring, controls spool, control valve body, control valve push rod, control valve push rod spring, valve body, overflow ball valve core, overflow piston, main spool spring, main spool spring cover and pretightening force adjusting bolt;
Control valve body is placed in valve body top, is connected with valve body by screw thread, and its left end screw thread and valve body form adjustable damping; Control valve left end cap is installed in control valve body left end tapped hole; Control valve spring one end withstands on control valve left end cap right-hand member shoulder, and the other end withstands on and controls, on spool left end shoulder, control spool to be pressed in control valve body inner cylinder aperture right-hand member; Control valve push rod spring is positioned at the first control chamber, and control valve push rod spring left end withstands on bottom the cylindrical hole of control valve body right-hand member, and control valve push rod spring right-hand member withstands on the shoulder of control valve push rod left end; Control valve push rod small end is through control valve body inner aperture, and its large end and control valve body right-hand member cylindrical hole are formed and be slidably matched; Sealing bolt is positioned at control valve body right-hand member, is threaded connection with control valve body; The upper end of valve body is provided with and controls mouth S mouth, controls mouth S mouth and is connected with the first control chamber;
Control piston is positioned at valve body left end cylindrical hole, control piston cylndrical surface and valve body left end cylindrical hole are formed and are slidably matched, spiral shell resistance is connected with valve body by valve body left end tapped hole, control piston left side and spiral shell hinder right side and contact push rod cylndrical surface and valve body medial small hole and form and be slidably matched, push rod left end withstands on control piston right side, and push rod right-hand member withstands on main valve plug left end cylinder groove bottom surface;
Valve pocket is positioned at valve body right-hand member cylindrical hole, and valve pocket and valve body right-hand member cylindrical hole form and be slidably matched; Main valve plug is positioned at valve body right-hand member cylindrical hole, and on the left of it, small end cylndrical surface and valve pocket form and be slidably matched, and on the right side of main valve plug, large end cylndrical surface and main spool spring overlap cylindrical hole and form and be slidably matched; Valve body lower end is provided with load port V mouth, and load port V mouth is connected with load cavity; Valve pocket spring is positioned at load cavity, and valve pocket spring left end withstands on bottom valve body right-hand member cylindrical hole, and valve pocket spring right-hand member withstands on valve pocket left end groove;
Overflow piston is positioned at main spool spring cover left end cylindrical hole, and the large end of overflow piston and main spool spring overlap cylindrical hole and form and be slidably matched, and the large end left side of overflow piston withstands on main valve plug right side, and overflow piston left end sphere withstands on main valve plug right-hand member groove shoulder; Valve body lower end is provided with return opening F mouth, and return opening F mouth is communicated with oil back chamber;
Main spool spring is positioned at the first draining chamber, and its left end withstands on overflow piston right-hand member shoulder, and its right-hand member withstands on pretightening force adjusting bolt left end shoulder; Pretightening force adjusting bolt and main spool spring overlap right-hand member tapped hole and are threaded connection.
Described control valve body inner aperture forms the first control chamber jointly with control spool right-hand member sphere, control valve push rod left end and valve body.
Described control piston cylinder groove right-hand member and spiral shell hinder right side, control valve body left side, control valve push rod right side, sealing bolt 14 left side and valve body and jointly form the second control chamber; Control piston right side and valve body left end cylindrical hole and push rod form the second draining chamber jointly;
Described main valve plug cylinder groove right-hand member and valve pocket left end, valve body right-hand member cylindrical hole and overflow piston left end sphere form load cavity; The main valve plug conical surface and valve body right-hand member cylndrical surface, overflow piston sphere and valve pocket right side form oil back chamber jointly.
Described overflow piston right side and pretightening force adjusting bolt left side and main spool spring overlap left end cylndrical surface and jointly form the first draining chamber.
Described control spool, the fluid-control one-way valve arrangement that control valve body and control valve push rod are formed; And the common composition control oil circuit of adjustable damping structure of control valve body left end tapped hole and valve body formation.
The beneficial effect that the present invention has is:
The relief function completed by an independent spool is integrated on main valve plug and reduces valve number of components, make valve body long-pending less, more compact structure; The non-return valve function of main valve forward is integrated on valve pocket, simplifies main valve structure, one-way valve is oppositely sealed more reliable; Oil circuit control simplified and is integrated in a control module, saving valve space, reducing the technological requirement of oil circuit control processing.
Accompanying drawing explanation
Fig. 1 is structural principle schematic diagram of the present invention.
Fig. 2 is the load phase diagram that direct-acting type load control valve is unidirectional when rising when opening.
When Fig. 3 is load decline, direct-acting type load control valve controls phase diagram when opening.
Fig. 4 is the phase diagram of direct-acting type load control valve overflow when opening.
Fig. 5 is the phase diagram that direct-acting type load control valve controls when spool is oppositely opened.
In figure: 1, spiral shell resistance, 2, control piston, 3, push rod, 4, valve pocket spring, 5, main valve plug, 6, valve pocket, 7, control valve left end cap, 8, control valve spring, 9, control spool, 10, control valve body, 11, control valve push rod, 12, control valve push rod spring, 13, valve body, 14, sealing bolt, 15, overflow piston, 16, main spool spring, 17, main spool spring cover, 18, pretightening force adjusting bolt, 19, the first draining chamber, the 20, first control chamber, 21, oil back chamber, 22, load cavity, 23, the second draining chamber, the 24, second control chamber.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, the present invention includes spiral shell resistance 1, control piston 2, push rod 3, valve pocket spring 4, main valve plug 5, valve pocket 6, control valve left end cap 7, control valve spring 8, control spool 9, control valve body 10, control valve push rod 11, control valve push rod spring 12, valve body 13, sealing bolt 14, overflow piston 15, main spool spring 16, main spool spring cover 17 and pretightening force adjusting bolt 18.
Control valve body 10 is placed in valve body 13 top, is connected with valve body 13 by screw thread, and its left end screw thread and valve body 13 form adjustable damping; Control valve left end cap 7 is installed in control valve body 10 left end tapped hole; Control valve spring 8 one end withstands on control valve left end cap 7 right-hand member shoulder, and the other end withstands on and controls, on spool 9 left end shoulder, control spool 9 to be pressed in control valve body 10 inner cylinder aperture right-hand member; Control valve push rod spring 12 is positioned at the first control chamber 20, and control valve push rod spring 12 left end withstands on bottom the cylindrical hole of control valve body 10 right-hand member, and control valve push rod spring 12 right-hand member withstands on the shoulder of control valve push rod 11 left end; Control valve push rod 11 small end is through control valve body 10 inner aperture, and its large end and control valve body 10 right-hand member cylindrical hole are formed and be slidably matched; Sealing bolt 14 is positioned at control valve body 13 right-hand member, is threaded connection with control valve body 13; Control valve body 10 inner aperture forms the first control chamber 20 jointly with control spool 9 right-hand member sphere, control valve push rod 11 left end and valve body 13, and the upper end of valve body 13 is provided with and controls mouth S mouth, controls mouth S mouth and is connected with the first control chamber 20.
Control piston 2 is positioned at valve body 13 left end cylindrical hole, and control piston 2 cylndrical surface and valve body 13 left end cylindrical hole are formed and be slidably matched, and spiral shell resistance 1 is connected with valve body 13 by valve body 13 left end tapped hole, and control piston 2 left side and spiral shell hinder 1 right side and contact; Control piston 2 cylinder groove right-hand member and spiral shell hinder 1 right side, control valve body 10 left side, control valve push rod 11 right side, sealing bolt 14 left side and valve body 13 and jointly form the second control chamber 24; Push rod 3 cylndrical surface and valve body 13 medial small hole form and are slidably matched, and push rod 3 left end withstands on control piston 2 right side, and push rod 3 right-hand member withstands on main valve plug 5 left end cylinder groove bottom surface; Control piston 2 right side and valve body 13 left end cylindrical hole and push rod 3 form the second draining chamber 23 jointly.
Valve pocket 6 is positioned at valve body 13 right-hand member cylindrical hole, and valve pocket 6 and valve body 13 right-hand member cylindrical hole form and be slidably matched; Main valve plug 5 is positioned at valve body 13 right-hand member cylindrical hole, and on the left of it, small end cylndrical surface and valve pocket 6 form and be slidably matched, and on the right side of main valve plug 5, large end cylndrical surface and main spool spring overlap 17 cylindrical holes and form and be slidably matched; Main valve plug 5 cylinder groove right-hand member and valve pocket 6 left end, valve body 13 right-hand member cylindrical hole and overflow piston 15 left end sphere form load cavity 22; Valve body 13 lower end is provided with load port V mouth, and load port V mouth is connected with load cavity 22; Valve pocket spring 4 is positioned at load cavity 22, and valve pocket spring 4 left end withstands on bottom valve body 13 right-hand member cylindrical hole, and valve pocket spring 4 right-hand member withstands on valve pocket 6 left end groove.
Overflow piston 15 is positioned at main spool spring and overlaps 17 left end cylindrical holes, and overflow piston 15 greatly end and main spool spring overlaps 17 cylindrical holes and forms and be slidably matched, and overflow piston 15 holds greatly left side to withstand on main valve plug 5 right side; Overflow piston 15 left end sphere withstands on main valve plug 5 right-hand member groove shoulder; Main valve plug 5 conical surface and valve body 13 right-hand member cylndrical surface, overflow piston 15 sphere and valve pocket 6 right side form oil back chamber 21 jointly; Valve body 13 lower end is provided with return opening F mouth, and return opening F mouth is communicated with oil back chamber 21.
Overflow piston 15 right side and pretightening force adjusting bolt 18 left side and main spool spring overlap 17 left end cylndrical surface and jointly form the first draining chamber 19; Main spool spring 16 is positioned at the first draining chamber 19, and its left end withstands on overflow piston 15 right-hand member shoulder, and its right-hand member withstands on pretightening force adjusting bolt 18 left end shoulder; Pretightening force adjusting bolt 18 and main spool spring overlap 17 right-hand member tapped holes and are threaded connection.
Described control spool 9, the fluid-control one-way valve arrangement that control valve body 10 and control valve push rod 11 are formed; And the common composition control oil circuit of adjustable damping structure of control valve body 10 left end tapped hole and valve body 13 formation.
working principle of the present invention is as follows:
As shown in Figure 2, for load rise time, load control valve is as state during one-way valve opens, now hydraulic oil enters the oil back chamber 21 of direct-acting type load control valve from F mouth, and promote valve pocket 6 compression valve sleeve spring 4 and move right, valve port is opened, hydraulic oil enters load cavity 22 through valve port, and then flow out from V mouth, now, it is motionless that main valve plug 5, control piston 2, push rod 3, control spool 9 and control valve push rod 11 are in original position.
As shown in Figure 3, for load decline time, load control valve controls state when opening.When not controlling oil and entering from control mouth S mouth, hydraulic oil enters load cavity 22 through V mouth, and act on main valve plug 5 cylinder groove right-hand member, due to the effect of main spool spring 16 pretightening force, main valve can not be opened.When control oil enters the first control chamber 20 through controlling mouth S mouth, push control spool 9 open and flow into the second control chamber 24, control oil and act on control piston 2 cylinder groove right-hand member, under the promotion of push rod 3, promote main valve plug 5 to open, hydraulic oil restriction on main valve plug 5 flows into oil back chamber 21, flows out from return opening F mouth.Now to be in original position motionless for control valve push rod 11
As shown in Figure 4, for the situation when overflow of direct-acting type load control valve is opened, control mouth S mouth is entered when not controlling oil, and the hydraulic fluid pressure entered from load port V mouth too high time, hydraulic oil in load cavity 22 directly acts on overflow piston 15 by main valve plug 5 inner aperture, promotes overflow piston 15 and compresses main spool spring 16, overflow piston 15 is opened, hydraulic oil enters oil back chamber 21 by perforate on main valve plug 5, flows out from return opening F mouth.Now control piston 2, push rod 3, main valve plug 5, controlling spool 9 and control valve push rod 11, to be in original position motionless.
As shown in Figure 5, for situation when direct-acting type load control valve spool is oppositely opened, when control-oil pressure reduces, when main valve plug 5 moves right, control piston 2 moves right under the promotion of push rod 3, controls oil and acts on control valve push rod 11 right side, compression control valve follower spring 12, and opened by control valve push rod 11 promotion control spool 9, control oil controls spool 9 by ball valve and is back to the first control chamber 20, and passes through the outflow of control mouth S mouth.
Claims (6)
1. relief function is integrated in the direct-acting type load control valve of main valve plug by one kind, it is characterized in that: comprise spiral shell resistance (1), control piston (2), push rod (3), valve pocket spring (4), main valve plug (5), valve pocket (6), control valve left end cap (7), control valve spring (8), controls spool (9), control valve body (10), control valve push rod (11), control valve push rod spring (12), valve body (13), sealing bolt (14), overflow piston (15), main spool spring (16), main spool spring cover (17) and pretightening force adjusting bolt (18);
Control valve body (10) is placed in valve body (13) top, is connected with valve body (13) by screw thread, and its left end screw thread and valve body (13) form adjustable damping; Control valve left end cap (7) is installed in control valve body (10) left end tapped hole; Control valve spring (8) one end withstands on control valve left end cap (7) right-hand member shoulder, and the other end withstands on and controls, on spool (9) left end shoulder, will control spool (9) and be pressed in control valve body (10) inner cylinder aperture right-hand member; Control valve push rod spring (12) is positioned at the first control chamber (20), control valve push rod spring (12) left end withstands on bottom the cylindrical hole of control valve body (10) right-hand member, and control valve push rod spring (12) right-hand member withstands on the shoulder of control valve push rod (11) left end; Control valve push rod (11) small end is through control valve body (10) inner aperture, and its large end and control valve body (10) right-hand member cylindrical hole are formed and be slidably matched; Sealing bolt (14) is positioned at control valve body (13) right-hand member, is threaded connection with control valve body (13); The upper end of valve body (13) is provided with and controls mouth S mouth, controls mouth S mouth and is connected with the first control chamber (20);
Control piston (2) is positioned at valve body (13) left end cylindrical hole, control piston (2) cylndrical surface and valve body (13) left end cylindrical hole are formed and are slidably matched, spiral shell resistance (1) is connected with valve body (13) by valve body (13) left end tapped hole, and control piston (2) left side hinders (1) right side and contacts with spiral shell; Push rod (3) cylndrical surface and valve body (13) medial small hole form and are slidably matched, and push rod (3) left end withstands on control piston (2) right side, and push rod (3) right-hand member withstands on main valve plug (5) left end cylinder groove bottom surface; Valve pocket (6) is positioned at valve body (13) right-hand member cylindrical hole, and valve pocket (6) and valve body (13) right-hand member cylindrical hole form and be slidably matched; Main valve plug (5) is positioned at valve body (13) right-hand member cylindrical hole, and on the left of it, small end cylndrical surface and valve pocket (6) form and be slidably matched, and large end cylndrical surface, main valve plug (5) right side and main spool spring cover (17) cylindrical hole form and be slidably matched; Valve body (13) lower end is provided with load port V mouth, and load port V mouth is connected with load cavity (22); Valve pocket spring (4) is positioned at load cavity (22), and valve pocket spring (4) left end withstands on bottom valve body (13) right-hand member cylindrical hole, and valve pocket spring (4) right-hand member withstands on valve pocket (6) left end groove;
Overflow piston (15) is positioned at main spool spring cover (17) left end cylindrical hole, overflow piston (15) greatly end and main spool spring cover (17) cylindrical hole forms and is slidably matched, overflow piston (15) withstands on main valve plug (5) right side in end left side greatly, and overflow piston (15) left end sphere withstands on main valve plug (5) right-hand member groove shoulder; Valve body (13) lower end is provided with return opening F mouth, and return opening F mouth is communicated with oil back chamber (21);
Main spool spring (16) is positioned at the first draining chamber (19), and its left end withstands on overflow piston (15) right-hand member shoulder, and its right-hand member withstands on pretightening force adjusting bolt (18) left end shoulder; Pretightening force adjusting bolt (18) and main spool spring cover (17) right-hand member tapped hole are threaded connection.
2. a kind of direct-acting type load control valve relief function being integrated in main valve plug according to claim 1, is characterized in that: described control valve body (10) inner aperture forms the first control chamber (20) jointly with control spool (9) right-hand member sphere, control valve push rod (11) left end and valve body (13).
3. a kind of direct-acting type load control valve relief function being integrated in main valve plug according to claim 1, is characterized in that: described control piston (2) cylinder groove right-hand member and spiral shell hinder (1) right side, control valve body (10) left side, control valve push rod (11) right side, sealing bolt (14) left side and valve body (13) and jointly form the second control chamber (24); Control piston (2) right side and valve body (13) left end cylindrical hole and push rod (3) form the second draining chamber (23) jointly.
4. a kind of direct-acting type load control valve relief function being integrated in main valve plug according to claim 1, is characterized in that: described main valve plug (5) cylinder groove right-hand member and valve pocket (6) left end, valve body (13) right-hand member cylindrical hole and overflow piston (15) left end sphere form load cavity (22); Main valve plug (5) conical surface and valve body (13) right-hand member cylndrical surface, overflow piston (15) sphere and valve pocket (6) right side form oil back chamber (21) jointly.
5. a kind of direct-acting type load control valve relief function being integrated in main valve plug according to claim 1, is characterized in that: described overflow piston (15) right side and pretightening force adjusting bolt (18) left side and main spool spring cover (17) left end cylndrical surface form the first draining chamber (19) jointly.
6. a kind of direct-acting type load control valve relief function being integrated in main valve plug according to claim 1, is characterized in that: described control spool (9), the fluid-control one-way valve arrangement that control valve body (10) and control valve push rod (11) are formed; And the common composition control oil circuit of adjustable damping structure that control valve body (10) left end tapped hole and valve body (13) are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510207823.6A CN104806595B (en) | 2015-04-29 | 2015-04-29 | Direct-acting type load control valve used for integrating overflowing function into main valve core |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510207823.6A CN104806595B (en) | 2015-04-29 | 2015-04-29 | Direct-acting type load control valve used for integrating overflowing function into main valve core |
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| CN104806595A true CN104806595A (en) | 2015-07-29 |
| CN104806595B CN104806595B (en) | 2017-02-01 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0042929A1 (en) * | 1980-06-30 | 1982-01-06 | Abex Corporation | Dual pilot counterbalance valve |
| JPH07180781A (en) * | 1993-12-24 | 1995-07-18 | Tokimec Inc | Pilot operation type pressure control valve |
| JPH1038111A (en) * | 1996-07-23 | 1998-02-13 | Asahi Enterp:Kk | Relief valve |
| CN101886641A (en) * | 2009-05-12 | 2010-11-17 | 上海立新液压有限公司 | Balanced valve |
| CN202746315U (en) * | 2012-08-23 | 2013-02-20 | 淮安市胜杰液压机械有限公司 | Reversing valve with direct-acting overflowing valve |
| CN204591850U (en) * | 2015-04-29 | 2015-08-26 | 浙江大学 | A kind of direct-acting type load control valve relief function being integrated in main valve plug |
-
2015
- 2015-04-29 CN CN201510207823.6A patent/CN104806595B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0042929A1 (en) * | 1980-06-30 | 1982-01-06 | Abex Corporation | Dual pilot counterbalance valve |
| JPH07180781A (en) * | 1993-12-24 | 1995-07-18 | Tokimec Inc | Pilot operation type pressure control valve |
| JPH1038111A (en) * | 1996-07-23 | 1998-02-13 | Asahi Enterp:Kk | Relief valve |
| CN101886641A (en) * | 2009-05-12 | 2010-11-17 | 上海立新液压有限公司 | Balanced valve |
| CN202746315U (en) * | 2012-08-23 | 2013-02-20 | 淮安市胜杰液压机械有限公司 | Reversing valve with direct-acting overflowing valve |
| CN204591850U (en) * | 2015-04-29 | 2015-08-26 | 浙江大学 | A kind of direct-acting type load control valve relief function being integrated in main valve plug |
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| CN104806595B (en) | 2017-02-01 |
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