CN107939766A - A kind of oil supplementation buffer valve - Google Patents
A kind of oil supplementation buffer valve Download PDFInfo
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- CN107939766A CN107939766A CN201711458884.5A CN201711458884A CN107939766A CN 107939766 A CN107939766 A CN 107939766A CN 201711458884 A CN201711458884 A CN 201711458884A CN 107939766 A CN107939766 A CN 107939766A
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- hydraulic fluid
- fluid port
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- pressure
- piston
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Classifications
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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
- F15B13/023—Excess flow valves, e.g. for locking cylinders in case of hose burst
Abstract
The present invention proposes a kind of oil supplementation buffer valve, including：Valve body, which is provided with hydraulic fluid port A, hydraulic fluid port B and hydraulic fluid port T, the hydraulic fluid port A are located at one end of valve body, and the hydraulic fluid port B is located at the one end side close to hydraulic fluid port A, and the hydraulic fluid port T is located at the other end side away from hydraulic fluid port A；Main valve plug, it is actively installed in the valve body and closure hydraulic fluid port B, and which is provided with the first damp channel for leading to control chamber from hydraulic fluid port A；Repairing piston, it is located in the valve body and is connected with the main valve plug, for when hydraulic fluid port B pressure is high by the fluid by-carriage of hydraulic fluid port B to hydraulic fluid port A；The two-stage pressure-regulating mechanism set in swivel nut and swivel nut；The two-stage pressure-regulating mechanism is arranged to：In hydraulic fluid port A oil inlets, from formation first order pressure overflow and second level pressure overflow hydraulic fluid port A to hydraulic fluid port T.The oil supplementation buffer valve meets big flow applying working condition, can effective shock absorbing pressure and with repairing function.
Description
Technical field
The present invention relates to valve technology field, and in particular to a kind of oil supplementation buffer valve.
Background technology
In modern mechanical equipment slewing equipment, pooling feature hydraulic circuit has been widely applied, has been filled as excavator turns round
Put, crane rotation device, high-altitude operation vehicle slewing equipment, manipulator slewing equipment and agriculture and forestry machinery slewing equipment etc., wherein
It is main to include playing the role of the buffer overflow valve of shock absorbing and play the role of the repairing check valve of repairing.At present, slewing equipment
The buffer overflow valve and repairing check valve of middle use are all split type, it is necessary to which both different valves are integrated on valve plate,
Volume is relatively large, and price is higher.As notification number is CN103174691 B, entitled " is used for the anti-of Hydraulic slewing system
Revolution buffer loop disclosed in the patent of invention of fluctuation of load revolution buffer control circuit " includes slewing directional control valve and repairing
Buffer loop, wherein repairing buffer loop include the first trimmer valve, the second trimmer valve, the first repairing check valve and the second repairing list
To valve, oil circuit is more complicated, and system integration difficulty is big, and overall volume is necessarily larger.And for example notification number is CN1350126A, title
A kind of rotary buffering valve is disclosed for the patent of invention of " rotary buffering valve ", it will manipulate valve, trimmer valve, two repairing check valves
It is integrated together, structure and flow passage configuration are increasingly complex, and processing and manufacturing cost is very high.
In above-mentioned revolution buffer loop, trimmer valve is the crucial Hydraulic Elements of this kind of system, buffers the quality of valve performance
Directly affect the performance of host.Existing trimmer valve is divided into board-like two kinds of trimmer valve and plug-in trimmer valve by connection mode,
In systems in order to reduce installation space, system reliability is improved, generally using plug-in trimmer valve.As Authorization Notice No. is
The patent of CN202073860, entitled " threaded plug-in adjustable buffer overflow valve ", disclose a kind of trimmer valve, including valve
Set, valve seat, spool, spring and damper piston, valve pocket have the first hydraulic fluid port, and valve seat is arranged on the front end of valve pocket and with the second oil
Mouthful, spool is arranged in valve pocket, and pressure regulation swivel nut has front end inner cavity, can simultaneously move axially and then can change arranged on the rearward end of valve pocket
The axial elastic force of spring, the guide part of damper piston including rear end, the projecting ring section of middle part radial protrusion and front end axially open with
The volumetric cylinder portion that spool rearward end coordinates, the rear end face of projecting ring section are more than front end face, have among projecting ring section and supply the calm canister portion of fluid
The interface channel on the outside of rear end is flowed to, volumetric cylinder portion is laterally lateral with being flowed to for the calm canister portion inner cavity of fluid to volumetric cylinder portion outer wall
Passage.Although the invention can realize simple buffering relief function, it has the following disadvantages：
1) it is direct-acting overflow valve, and through-current capability is small, and fever is severe, is not suitable for the slewing equipment of big flow.
2) it sets up the first stage pressure by Adjusting bolt Adjusting screw, and the pressure of the second hydraulic fluid port rose rapidly to first order pressure before this
Spring is compressed second mouthful of pressure rise to the second stage pressure by power overflow, simultaneous buffering piston again, although passing through
The switching of first class pressure and the second stage pressure can be such that slewing equipment slowly starts, but because the movement of damper piston is first
Start before stage pressure, therefore first order pressure is higher and equally exists overshoot impact, for some accurate revolutions
Gear or motor in device have great danger of burst；If the first stage pressure turned down, is on the one hand likely to cause
Two hydraulic fluid port hypotony, too low first order insufficient pressure with promote damper piston compress spring, buffer overflow valve disabler.
The content of the invention
For some or all of of the above-mentioned technical problem in the presence of the prior art, the present invention proposes a kind of satisfaction
Big flow applying working condition, can effectively shock absorbing pressure, the oil supplementation buffer valve with repairing function.
In order to realize above goal of the invention, the present invention propose it is a kind of have with the oil supplementation buffer valve of lower structure, including：
Valve body, which is provided with hydraulic fluid port A, hydraulic fluid port B and hydraulic fluid port T, the hydraulic fluid port A are located at one end of valve body, and the hydraulic fluid port B is located at
Close to the one end side of hydraulic fluid port A, the hydraulic fluid port T is located at the other end side away from hydraulic fluid port A；
Main valve plug, it is actively installed in the valve body and closure hydraulic fluid port B, and which is provided with from hydraulic fluid port A and lead to control chamber
First damp channel；
Repairing piston, it is located in the valve body and is connected with the main valve plug, for when hydraulic fluid port B pressure is high by hydraulic fluid port
The fluid by-carriage of B is to hydraulic fluid port A；
Swivel nut, its one end are connected in the one end of the valve body away from hydraulic fluid port A and form control chamber between main valve plug, institute
State and the first elastic component is equipped between the lower end of swivel nut and main valve plug, two-stage pressure-regulating mechanism is equipped with the swivel nut；The two-stage tune
Press mechanism is arranged to：In hydraulic fluid port A oil inlets, overflow from formation first order pressure overflow and the second stage pressure hydraulic fluid port A to hydraulic fluid port T
Stream.
In one embodiment, the two-stage pressure-regulating mechanism includes：Pilot valve, the second elastic component, damper piston, change
To spool and reversing valve core regulation component, one end of pilot valve is connected to the swivel nut in one end of main valve plug, described
Second elastic component is located between one end of the pilot valve and the damper piston, and pilot valve is equipped with the pilot valve
Chamber, the pilot valve core cavity are connected with the reversing valve core by damper piston, and the reversing valve core regulation component is changed described
It is crimped on to spool on the valve port of the damper piston.
In one embodiment, the reversing valve core regulation component includes commutation valve seat, the 3rd elastic component and pressing sleeve, institute
State pressing sleeve the commutation valve seat is crimped on the inner cavity of the damper piston other end, the 3rd elastic component is located at reversal valve
Between the attachment spacers and pressing sleeve of core.
In one embodiment, it is described formed with cushion chamber between the outside of the damper piston other end and swivel nut
Formed with the first through-flow channel between the valve port of damper piston chamber and the damper piston.
In one embodiment, compression stroke is left between the shoulder of the lower end of the damper piston and swivel nut lower end,
When the fluid passed through from pilot valve core cavity overcomes the open-top reversing valve core of the pressure of the 3rd elastic component, fluid is through the first through-flow channel
Cushion chamber is flowed to, the pressure of cushion chamber promotes damper piston to compress the second elastic component until damper piston is connected to the swivel nut
On shoulder, the oil pressure relief of hydraulic fluid port A is adjusted to the second stage pressure from the first stage pressure.
In one embodiment, the damper piston is equipped with the second through-flow channel of connection hydraulic fluid port T, and described second is logical
Circulation road is connected with the inner cavity of the reversing valve core regulation component.
In one embodiment, the pilot valve is inverted T-type structure, and ball is equipped with the outside of the big end of the pilot valve
Shape or arcuate projections, the protrusion are pressed on the valve port of the swivel nut, small end and the damper piston endoporus of the pilot valve
It is slidably matched.
In one embodiment, the control chamber is connected with the pilot valve core cavity by the second damp channel, described
Second damp channel is located at the input end of the valve port of swivel nut, and the opposite side of the valve port of the swivel nut is equipped with the first of connection hydraulic fluid port T
Through hole, the first through hole are separated with second damp channel by pilot valve.
In one embodiment, the valve body is equipped with flow-guiding channel with repairing piston junction, and the main valve plug is T-shaped
Structure, repairing piston are socketed in the main valve plug lower part to be cylindric, and when hydraulic fluid port B pressure height, hydraulic fluid port A is in low pressure or is emptied
During state, the fluid of hydraulic fluid port B promotes the movement of repairing piston through flow-guiding channel, and repairing piston is abutting the annular of T-shaped main valve plug
Main valve plug is promoted to move upwardly together the first elastic component of compression during alar part, main valve plug is opened, and fluid is mended to hydraulic fluid port A from hydraulic fluid port B.
In one embodiment, the annular alar part of the T-shaped main valve plug is equipped with discharge orifice, is gone back on the main valve plug
Equipped with the flow channels and flowing hole connected with hydraulic fluid port A, connectivity slot is additionally provided with the inside of the repairing piston, when the repairing is lived
When plug moves to the connectivity slot and connected with flow channels, the fluid of control chamber is through flow channels, flowing hole from hydraulic fluid port A outflows.
Compared with prior art, the advantage of the invention is that：
The oil supplementation buffer valve of the present invention forms first by setting two-stage pressure-regulating mechanism to realize from hydraulic fluid port A to hydraulic fluid port T
Stage pressure overflow and second level pressure overflow, the first stage pressure are exactly the setting pressure of the second elastic component, and the first stage pressure is not high,
The movement of simultaneous buffering piston is started after the first stage pressure, can not only meet big flow applying working condition, and can play
The effect of more effective shock absorbing pressure.In addition, band repairing function is additionally provided with, when hydraulic fluid port B is in elevated pressures and hydraulic fluid port A
When in low pressure or being emptied state, the fluid of hydraulic fluid port B can be added to hydraulic fluid port A so that overflow pooling feature has remained
Effect state.
Brief description of the drawings
The preferred embodiment of the present invention is described in detail below in conjunction with attached drawing, in figure：
Fig. 1 is the structure diagram of the one of which embodiment of the oil supplementation buffer valve of the present invention；
Fig. 2 is the C-C partial enlarged views in Fig. 1；
Fig. 3 is the function graphical diagram of the present invention.
In attached drawing, identical component uses identical reference numeral.Attached drawing is not drawn according to actual ratio.
Embodiment
In order to which technical scheme and advantage is more clearly understood, below in conjunction with attached drawing to the exemplary of the present invention
Embodiment is described in more detail.Obviously, described embodiment is only the part of the embodiment of the present invention, rather than
The exhaustion of all embodiments.And in the case where there is no conflict, the feature in the embodiment and embodiment in the present invention can be mutual
It is combined.
Inventor is during invention it is noted that existing direct-acting overflow valve, through-current capability is small, is not suitable for big flow
Slewing equipment, buffer loop needs to integrate that single trimmer valve and Fill valve be bulky, cost is higher.In addition, buffering is lived
The movement of plug starts before the first stage pressure, therefore first order pressure is higher and there is overshoot impact, turns down
First class pressure easily makes overflow valve disabler again.
Deficiency, the embodiment of the present invention propose a kind of oil supplementation buffer valve, are illustrated below for more than.
Fig. 1 shows a kind of one of which embodiment of oil supplementation buffer valve of the present invention.In this embodiment, it is of the invention
A kind of oil supplementation buffer valve mainly includes：Valve body 1, main valve plug 2, repairing piston 3, swivel nut 5 and two-stage pressure-regulating mechanism.Wherein, valve body 1
It is equipped with hydraulic fluid port A, hydraulic fluid port B and hydraulic fluid port T.Hydraulic fluid port A is located at the lower end of valve body 1, and hydraulic fluid port B is located at the lower end side close to hydraulic fluid port A, oil
Mouth T is located at the upper side away from hydraulic fluid port A.According to the intracavity diameter of valve body 1, valve body 1 includes the first chamber, the second chamber from the top down
With the 3rd chamber.Main valve plug 2 is T-shaped mechanism, and the big end of main valve plug 2 is located at the second chamber, and the small end of main valve plug 2 is slided with the 3rd chamber matches somebody with somebody
Close, main valve plug 2 non-repairing state after the 3rd chamber for being opened in valve body 1 hydraulic fluid port A and hydraulic fluid port B.Main valve plug 2 is equipped with from oil
Mouth A leads to the first damp channel of control chamber 15.Repairing piston 3 is located in valve body 1 and is connected with main valve plug 2, in hydraulic fluid port B
By the fluid by-carriage of hydraulic fluid port B to hydraulic fluid port A when pressure is high.The lower end of swivel nut 5 be connected in the one end of valve body away from hydraulic fluid port A and with master
Control chamber 15 is formed between spool.Lower end partition control chamber 15 and the hydraulic fluid port T of swivel nut 5.Swivel nut 5 is fixedly connected with valve body 1.Swivel nut
Connected between 5 lower end and main valve plug 2 by the first elastic component 4.Two-stage pressure-regulating mechanism is equipped with swivel nut 5.The two-stage pressure-regulating machine
Structure is arranged to：In hydraulic fluid port A oil inlets, from formation first order pressure overflow hydraulic fluid port A to hydraulic fluid port T and second level buffering overflow.
It is understood that first order pressure overflow and second level pressure overflow refer respectively to hydraulic fluid port A overflowing under the first stage pressure
Overflow under stream and the second stage pressure.
In one embodiment, the first damp channel mainly includes sequentially connected first axis through hole, the from the bottom up
One damping hole 21 and the first stepped hole.The upper end of main valve plug 2 is equipped with the main valve core cavity of the first elastic component of installation, first axis through hole
Connect hydraulic fluid port A, the first stepped hole connection main valve core cavity, main valve core cavity connection control chamber 15.
In one embodiment, two-stage pressure-regulating mechanism mainly includes：Pilot valve 7, the second elastic component 8, damper piston 9,
Reversing valve core 10 and reversing valve core regulation component.The lower end of pilot valve 7 is connected to swivel nut in one end of main valve plug.Second
Elastic component 8 is located between the lower end of pilot valve 7 and damper piston 9, and pilot valve core cavity 71, the guide are equipped with pilot valve 7
Spool chamber 71 is connected with reversing valve core 10 in the connection cavity of damper piston 9.The first stage pressure is not up in the pressure of hydraulic fluid port A
When, reversing valve core 10 is crimped on the valve port of damper piston 9 by reversing valve core regulation component.
In one embodiment, reversing valve core regulation component mainly includes commutation valve seat 11, the 3rd elastic component 12 and pressing sleeve
13.Wherein, commutation valve seat 11 is crimped on the inner cavity of 9 upper end of damper piston by pressing sleeve 13.3rd elastic component 12 is located at reversal valve
Between the attachment spacers and pressing sleeve 13 of core 10.Herein, attachment spacers is fixedly connected on the upper end of reversing valve core 10, works as reversing valve core
10 by promotion when being moved up, and attachment spacers promotes the 3rd elastic component 12 to move up compression.Herein, preferably commutate valve seat 11
Free air space is equipped between the valve port of lower end and damper piston 9, between 9 inner surface of outside and damper piston of commutation valve seat 11
Or passage gaps.
In one embodiment, damper piston 9 is located between the lateral surface of valve port upper end and the inner cavity of swivel nut 5 formed with slow
Rush chamber 53.Formed with the first through-flow channel 91 between the damper piston chamber 53 and the valve port of damper piston.Open-top reversing valve core 10
Afterwards, fluid can enter the compression damper piston 9 downwards of damper piston chamber 53 by first circulation passage 91.
In one embodiment, compression stroke is left between the shoulder 54 of 5 lower end of the lower end of damper piston 9 and swivel nut.When
When the fluid passed through from pilot valve 7 overcomes the pressure of the 3rd elastic component 12 open-top reversing valve core 10, fluid is through-flow logical through first
Road 91 flows to cushion chamber 53, and the pressure of cushion chamber 53, which rises, promotes damper piston 9 to move down the second elastic component of compression 8 until slow
The lower end for rushing piston 9 is connected on the shoulder 54 of swivel nut 5.At this time, the oil pressure relief of hydraulic fluid port A is adjusted to second from the first stage pressure
Stage pressure.
In one embodiment, damper piston 9 is equipped with the second through-flow channel 92 of connection hydraulic fluid port T, this is second through-flow logical
Road 92 is connected with the inner cavity (or inner cavity of commutation valve seat 11) of reversing valve core regulation component.It is, when reversing valve core 10 leaves
When the valve port of damper piston 9 moves upwardly so that the conical surface of 10 upper end of reversing valve core closes the valve port of 11 lower end of commutation valve seat, every
Stop to cushion chamber 53.The fluid only in commutation valve seat 11 can lead to through the circulation of the second circulation passage 92,5 lower end of swivel nut at this time
Road flows to hydraulic fluid port T.
In one embodiment, pilot valve 7 is inverted T-type structure.As shown in Figure 1, the big end positioned at 7 lower end of pilot valve
Outside is equipped with spherical or arcuate projections, which is pressed on the valve port of swivel nut 5, small end and the damper piston 9 of pilot valve 7
Endoporus is slidably matched, and is connected by pilot valve core cavity 71 with 9 central cavity of damper piston.Herein, it is to be understood that fluid
To be flowed into by middle pilot valve core cavity 71 in damper piston 9, from the second circulation passage 92 through pilot valve 7 and swivel nut 5 it
Between clearance channel flow to hydraulic fluid port T.The part in clearance channel herein is the first through hole 51 of connection hydraulic fluid port T.
In one embodiment, control chamber 15 is connected with pilot valve core cavity 71 by the second damp channel 52, the second damping
Passage 52 is located at the input end of the valve port of swivel nut 5, and the opposite side (or being the port of export) of the valve port of swivel nut 5 is equipped with connection hydraulic fluid port T
First through hole 51, first through hole 51 separated with the second damp channel 52 by pilot valve 7.
In one embodiment, as depicted in figs. 1 and 2, valve body 1 and the junction of repairing piston 3 are equipped with flow-guiding channel 23.
Main valve plug 2 is T-type structure, and repairing piston 3 is lower part that is cylindric and being socketed in main valve plug 2.When hydraulic fluid port B pressure is high and hydraulic fluid port A
When in low pressure or being emptied state, the fluid of hydraulic fluid port B promotes repairing piston 3 to move up through flow-guiding channel 23.Repairing piston 3 exists
Main valve plug 2 is promoted to move upwardly together the first elastic component 4 of compression when abutting the annular alar part of T-shaped main valve plug 2, main valve plug 2 is opened
Open, fluid is mended to hydraulic fluid port A from hydraulic fluid port B.
In one embodiment, as depicted in figs. 1 and 2, the annular alar part of T-shaped main valve plug 2 is equipped with discharge orifice 24.It is main
The flow channels 22 connected with hydraulic fluid port A and flowing hole 25 are additionally provided with spool 2, the inner side of repairing piston 3 is additionally provided with connectivity slot 31,
When repairing piston 31, which moves to connectivity slot 31, to be connected with flow channels 22, the fluid of control chamber passes through flow channels 22 and overcurrent
Flowed out from hydraulic fluid port A in hole 25.
In one embodiment, as shown in Figure 1 to Figure 3, primary focus of the invention and operation principle are as follows：
1) by setting 10 and the 3rd elastic component 12 of reversing valve core to coordinate, the Opening pressure of reversing valve core 10 can be controlled.
Before the Opening pressure is reached, the pressure of hydraulic fluid port A will not enter cushion chamber 53.In addition, cushion chamber 53 by second all
Road 92 leads to hydraulic fluid port T-phase.So it is not up to before the Opening pressure that the 3rd elastic component 12 is set up, damper piston 9 will not compress the
Two elastic components 8, the first stage pressure is just the pressure of the second elastic component 8 setting, thus first stage pressure will not be very high.Work as hydraulic fluid port
When A pressure reaches the pressure of the 3rd elastic component 12 setting, reversing valve core 10 overcomes the active force of the 3rd elastic component 12 to move upwards,
The conical surface on 10 top of reversing valve core and the valve port closure of commutation valve seat 11, cushion chamber 53 and hydraulic fluid port T are blocked.And reversing valve core
The conical surfaces of 10 lower parts opens the valve port on damper piston 9, the pressure oil of hydraulic fluid port A through the first damping hole 21, the second damp channel 52,
Flow-conveying groove 101, the first circulation passage 91 in pilot valve core cavity 71, reversing valve core 10 enter cushion chamber 53, are applied to buffering and live
On plug 9.Pressure in cushion chamber 53 promotes damper piston 9 to move downward the second elastic component 8 of compression, until moving to damper piston
9 lower end and the shoulder 54 of swivel nut 5 offset, and such hydraulic fluid port A pressure is adjusted to the second stage pressure.For pilot valve 7, when
Hydraulic fluid port A pressure reached the opened by pressure of second elastic component 8 (when damper piston 9 does not compress downwards the second elastic component 8) setting before this,
At this moment the pressure of hydraulic fluid port A is the first stage pressure.Then the Opening pressure for setting reversing valve core 10 is slightly lower than the first stage pressure, this
When hydraulic fluid port A pressure will reach the first stage pressure, reversing valve core 10 is then turned on sample, the progressively compression second downwards of damper piston 9
Elastic component 8, the Opening pressure of pilot valve 7 become larger, and hydraulic fluid port A pressure gradually rises, and finally reaches the second stage pressure.
2) when hydraulic fluid port B is in elevated pressures and hydraulic fluid port A is in low pressure or is emptied state, the pressure of hydraulic fluid port B is through water conservancy diversion
Passage 23 is applied on repairing piston 3, is promoted repairing piston 3 to move up and is bonded with the annular alar part of 2 upper end of main valve plug, is connected
Groove 31 is connected with flow channels 22, and the fluid of such hydraulic fluid port B, which is acted on repairing piston 3, promotes main valve plug 2 to move up, and controls
The fluid of chamber 15 quickly flows out hydraulic fluid port A by flowing hole 25, connectivity slot 31, flow channels 22, and fluid is mended to hydraulic fluid port A by hydraulic fluid port B,
Complete repairing function.
3) the overflow pooling feature principle that fluid is overflowed to hydraulic fluid port B by hydraulic fluid port A is：The fluid of hydraulic fluid port A is through the first damping hole
21 reach control chamber 15, flow to hydraulic fluid port T through pilot valve 6, main valve plug 2 is opened under hydraulic fluid port A and the differential pressure action of control chamber 15.
Certainly, with reference to the above the 1) point description, which divides secondary pressure overflow, the buffering of first order overflow before this, then buffering is lived
Plug 9 pushes the second elastic component 8, and pressure finally reaches the second stage pressure.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make these embodiments other change and modification.Therefore, appended claims are intended to be construed to include excellent
Select embodiment and fall into having altered and/or changing for the scope of the invention, the change made according to an embodiment of the invention and/
Or modification should be covered by the protection scope of the present invention.
Claims (10)
- A kind of 1. oil supplementation buffer valve, it is characterised in that including：Valve body, which is provided with hydraulic fluid port A, hydraulic fluid port B and hydraulic fluid port T, the hydraulic fluid port A are located at one end of valve body, and the hydraulic fluid port B is located at close The one end side of hydraulic fluid port A, the hydraulic fluid port T are located at the other end side away from hydraulic fluid port A；Main valve plug, it is actively installed in the valve body and closure hydraulic fluid port B, and which is provided with and lead to the first of control chamber from hydraulic fluid port A Damp channel；Repairing piston, it is located in the valve body and is connected with the main valve plug, for when hydraulic fluid port B pressure is high by hydraulic fluid port B's Fluid by-carriage is to hydraulic fluid port A；Swivel nut, its one end are connected in the one end of the valve body away from hydraulic fluid port A and control chamber, the spiral shell are formed between main valve plug The first elastic component is equipped between the lower end of set and main valve plug, two-stage pressure-regulating mechanism is equipped with the swivel nut；The two-stage pressure-regulating machine Structure is arranged to：In hydraulic fluid port A oil inlets, from formation first order pressure overflow and second level pressure overflow hydraulic fluid port A to hydraulic fluid port T.
- 2. oil supplementation buffer valve according to claim 1, it is characterised in that the two-stage pressure-regulating mechanism includes：Pilot valve, Second elastic component, damper piston, reversing valve core and reversing valve core regulation component, one end of pilot valve are connected to the swivel nut and lean on In one end of nearly main valve plug, second elastic component is located between one end of the pilot valve and the damper piston, described Pilot valve core cavity is equipped with pilot valve, the pilot valve core cavity is connected with the reversing valve core by damper piston, described to change The reversing valve core is crimped on the valve port of the damper piston to spool regulation component.
- 3. oil supplementation buffer valve according to claim 2, it is characterised in that the reversing valve core regulation component includes reversal valve The commutation valve seat is crimped on the inner cavity of the damper piston other end by seat, the 3rd elastic component and pressing sleeve, the pressing sleeve, institute The 3rd elastic component is stated to be located between the attachment spacers of reversing valve core and pressing sleeve.
- 4. oil supplementation buffer valve according to claim 3, it is characterised in that the outside of the damper piston other end and swivel nut Between formed with cushion chamber, formed with the first through-flow channel between the damper piston chamber and the valve port of the damper piston.
- 5. oil supplementation buffer valve according to claim 4, it is characterised in that the lower end of the damper piston and swivel nut lower end Compression stroke is left between shoulder, when the fluid passed through from pilot valve core cavity overcomes the open-top reversing valve core of pressure of the 3rd elastic component When, fluid flows to cushion chamber through the first through-flow channel, and the pressure of cushion chamber promotes damper piston to compress the second elastic component until slow Rush piston to be connected on the shoulder of the swivel nut, the oil pressure relief of hydraulic fluid port A is adjusted to the second stage pressure from the first stage pressure.
- 6. oil supplementation buffer valve according to claim 5, it is characterised in that the damper piston is equipped with connection hydraulic fluid port T's Second through-flow channel, second through-flow channel are connected with the inner cavity of the reversing valve core regulation component.
- 7. the oil supplementation buffer valve according to any one of claim 2 to 6, it is characterised in that the pilot valve is inverted T shaped Structure, the big end outside of the pilot valve are equipped with spherical or arcuate projections, which is pressed on the valve port of the swivel nut, The small end of the pilot valve is slidably matched with damper piston endoporus.
- 8. oil supplementation buffer valve according to claim 7, it is characterised in that the control chamber passes through with the pilot valve core cavity Second damp channel connects, and second damp channel is located at the input end of the valve port of swivel nut, the valve port of the swivel nut it is another Side is equipped with the first through hole of connection hydraulic fluid port T, and the first through hole is separated with second damp channel by pilot valve.
- 9. oil supplementation buffer valve according to any one of claim 1 to 8, it is characterised in that the valve body and repairing piston Junction is equipped with flow-guiding channel, and the main valve plug is T-type structure, and repairing piston is socketed in the main valve plug lower part to be cylindric, When hydraulic fluid port B pressure is high and hydraulic fluid port A is in low pressure or is emptied state, the fluid of hydraulic fluid port B promotes repairing piston to move through flow-guiding channel Dynamic, repairing piston promotes main valve plug to move upwardly together the first elastic component of compression when abutting the annular alar part of T-shaped main valve plug, Main valve plug is opened, and fluid is mended to hydraulic fluid port A from hydraulic fluid port B.
- 10. oil supplementation buffer valve according to any one of claim 1 to 9, it is characterised in that the T-shaped main valve plug Annular alar part is equipped with discharge orifice, is additionally provided with the main valve plug and the hydraulic fluid port A flow channels connected and flowing hole, the repairing Connectivity slot is additionally provided with the inside of piston, when the repairing piston motion to the connectivity slot is connected with flow channels, control chamber Fluid through flow channels, flowing hole from hydraulic fluid port A flow out.
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| CN201711458884.5A CN107939766A (en) | 2017-12-28 | 2017-12-28 | A kind of oil supplementation buffer valve |
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| CN201711458884.5A CN107939766A (en) | 2017-12-28 | 2017-12-28 | A kind of oil supplementation buffer valve |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108953709A (en) * | 2018-09-27 | 2018-12-07 | 邵延荣 | A kind of unloading valve |
| CN109026888A (en) * | 2018-10-18 | 2018-12-18 | 宁波文泽机电技术开发有限公司 | A kind of rotary buffering valve |
| CN110259751A (en) * | 2019-07-15 | 2019-09-20 | 宁波克泰液压有限公司 | Threaded insertion pilot is pressurized second level overflow valve |
| CN111425483A (en) * | 2020-04-17 | 2020-07-17 | 河海大学常州校区 | Oil cylinder tail end buffering device |
| CN112344068A (en) * | 2020-11-25 | 2021-02-09 | 力源液压（苏州）有限公司 | Buffer valve for realizing stepless pressure |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0908653A1 (en) * | 1997-10-07 | 1999-04-14 | Mannesmann Rexroth AG | Pilot operated pressure control valve |
| US20050183775A1 (en) * | 2004-02-25 | 2005-08-25 | Volvo Construction Equipment Holding Sweden Ab | Pilot operated relief valve |
| CN202073860U (en) * | 2011-06-01 | 2011-12-14 | 宁波克泰液压有限公司 | Threaded plug-in adjustable buffer overflow valve |
| CN102996557A (en) * | 2012-12-27 | 2013-03-27 | 宁波广天赛克思液压有限公司 | Pressure adjustable buffer overflow valve |
| EP2592319A1 (en) * | 2010-07-06 | 2013-05-15 | Volvo Construction Equipment AB | Valve for controlling pressure |
| JP2013527398A (en) * | 2010-05-17 | 2013-06-27 | ボルボ コンストラクション イクイップメント アーベー | Pressure control valve |
| CN204113788U (en) * | 2014-09-02 | 2015-01-21 | 徐州徐工液压件有限公司 | The Embedded shunting relief valve of a kind of shuttle valve |
| CN105909584A (en) * | 2016-03-02 | 2016-08-31 | 杭州力龙液压有限公司 | Buffer overflow valve |
-
2017
- 2017-12-28 CN CN201711458884.5A patent/CN107939766A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0908653A1 (en) * | 1997-10-07 | 1999-04-14 | Mannesmann Rexroth AG | Pilot operated pressure control valve |
| US20050183775A1 (en) * | 2004-02-25 | 2005-08-25 | Volvo Construction Equipment Holding Sweden Ab | Pilot operated relief valve |
| JP2013527398A (en) * | 2010-05-17 | 2013-06-27 | ボルボ コンストラクション イクイップメント アーベー | Pressure control valve |
| EP2592319A1 (en) * | 2010-07-06 | 2013-05-15 | Volvo Construction Equipment AB | Valve for controlling pressure |
| CN202073860U (en) * | 2011-06-01 | 2011-12-14 | 宁波克泰液压有限公司 | Threaded plug-in adjustable buffer overflow valve |
| CN102996557A (en) * | 2012-12-27 | 2013-03-27 | 宁波广天赛克思液压有限公司 | Pressure adjustable buffer overflow valve |
| CN204113788U (en) * | 2014-09-02 | 2015-01-21 | 徐州徐工液压件有限公司 | The Embedded shunting relief valve of a kind of shuttle valve |
| CN105909584A (en) * | 2016-03-02 | 2016-08-31 | 杭州力龙液压有限公司 | Buffer overflow valve |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108953709A (en) * | 2018-09-27 | 2018-12-07 | 邵延荣 | A kind of unloading valve |
| CN108953709B (en) * | 2018-09-27 | 2019-08-23 | 上海江浪科技股份有限公司 | A kind of unloading valve |
| CN109026888A (en) * | 2018-10-18 | 2018-12-18 | 宁波文泽机电技术开发有限公司 | A kind of rotary buffering valve |
| CN110259751A (en) * | 2019-07-15 | 2019-09-20 | 宁波克泰液压有限公司 | Threaded insertion pilot is pressurized second level overflow valve |
| CN111425483A (en) * | 2020-04-17 | 2020-07-17 | 河海大学常州校区 | Oil cylinder tail end buffering device |
| CN112344068A (en) * | 2020-11-25 | 2021-02-09 | 力源液压（苏州）有限公司 | Buffer valve for realizing stepless pressure |
| CN112344068B (en) * | 2020-11-25 | 2022-06-24 | 力源液压（苏州）有限公司 | Buffer valve for realizing stepless pressure |
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Application publication date: 20180420 |