CN108252975B - Two-way secondary pressure rotary buffering valve - Google Patents
Two-way secondary pressure rotary buffering valve Download PDFInfo
- Publication number
- CN108252975B CN108252975B CN201810062989.7A CN201810062989A CN108252975B CN 108252975 B CN108252975 B CN 108252975B CN 201810062989 A CN201810062989 A CN 201810062989A CN 108252975 B CN108252975 B CN 108252975B
- Authority
- CN
- China
- Prior art keywords
- valve
- hydraulic fluid
- fluid port
- control chamber
- pilot 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.)
- Active
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
-
- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention proposes a kind of two-way secondary pressure rotary buffering valves, comprising: valve body which is provided with hydraulic fluid port A, hydraulic fluid port B and hydraulic fluid port T；Main valve plug is connected in the valve body；Valve pocket connect with the valve body and is formed with the first control chamber and the second control chamber with the main valve plug, and the first elastic component is equipped between the main valve plug and the valve pocket；Damper piston which is provided with shuttle valve component and the first oil inlet passage being connected to the shuttle valve component, the second oil inlet passage and oil discharge passage；First pilot valve, one end are against on the first valve pocket mouth；Second pilot valve, one end are against on the second valve pocket mouth；Second elastic component is connected between the first pilot valve and damper piston；Third elastic component is connected between the second pilot valve and damper piston.Two-way secondary pressure rotary buffering valve impact is small, structure is simpler, compact for this, and processing is more convenient, cost is lower.
Description
Technical field
The present invention relates to valve technology fields, and in particular to a kind of two-way secondary pressure rotary buffering valve, the rotary buffering valve
It is mainly used in the swing mechanism etc. of other mechanical equipments such as minor crane, mini-excavator, high-altitude operation vehicle.
Background technique
The mobility that working efficiency and complete machine are improved in engineering machinery, generally there is swing mechanism.Automobile is risen
Heavy-duty machine, swing mechanism are even more indispensable.And load inertia of the autocrane in revolution is larger, starts, braking is frequent, work
Make inclement condition, thus its hydraulic system requires reliable operation, especially revolution cannot have big pressure in starting and braking
Impact.
The prior art generally prevents from overloading by setting rotary buffering valve.Current tonnage hydraulic automobile medium and small on the market rises
There are mainly two types of modes for the rotary buffering valve of heavy-duty machine: a kind of to be connected in parallel on rotary motor both ends using Two relief valve, another kind uses
Four check valves and a pilot operated compound relief valve form bridge；It starts, allow closed high-voltage oil liquid by overflowing in braking process
It flows valve to overflow, and both direction is all worked.But both the above rotary buffering valve is all made of multiple valve members, body
The more huge and higher cost of product, it is unsuitable to be widely used on minor crane.
In addition, existing rotary buffering valve is mostly first-level buffer, general surge is not big, soft.
Summary of the invention
For some or all of of the above-mentioned technical problem in the presence of the prior art, the invention proposes a kind of two-way
Secondary pressure rotary buffering valve, two-way secondary pressure rotary buffering valve impact is small, and structure is simpler, compact, processing is more convenient,
Cost is lower.
In order to realize the above goal of the invention, the invention proposes a kind of two-way secondary pressure revolution having following structure is slow
Rush valve, comprising:
Valve body which is provided with hydraulic fluid port A, hydraulic fluid port B and hydraulic fluid port T；
Main valve plug is connected in the valve body, and which is provided with the first clearance channel being connected to hydraulic fluid port B and with oil
Second clearance channel of mouth A connection, the main valve plug is cross-shaped structure, and the lower protrusion of the main valve plug is connected to the valve body
Valve port on isolation hydraulic fluid port A and hydraulic fluid port B, the channel being connected to hydraulic fluid port B is formed between the lower shoulder and valve body of the main valve plug；
Valve pocket connect the upper convex portion of the main valve plug and the recesses fit of valve pocket with the valve body and is formed with the second control
Chamber processed, the upper shoulder and valve body of the main valve plug and the first control of protrusion formation under the valve pocket of the recess portion two sides of valve pocket
Chamber, the first control chamber are connected to the first clearance channel, and the second control chamber is connected to the second clearance channel；First clearance channel
The middle part of first axis through-hole including being located at the side of the cross-shaped structure of main valve plug, the first axis through-hole is equipped with throttle butterfly
Structure；Second clearance channel includes the second axially extending bore being located in the middle part of the cross-shaped structure of main valve plug, and second axial direction is logical
The middle part in hole is equipped with throttle structure；The flow area of second axially extending bore is greater than the flow area of first axis through-hole；Institute
It states and is equipped with the first elastic component between main valve plug and the valve pocket；First be connected to the first control chamber is also formed on the valve pocket
Valve pocket mouth and the second valve pocket mouth being connected to the second control chamber；And
Damper piston, which is provided with shuttle valve component and the first oil inlet passage being connected to the shuttle valve component, second into
Oily channel and oil discharge passage；
First pilot valve, one end are against on the first valve pocket mouth, and other end grafting enters in the first oil inlet passage, and in it
The first first via hole equipped with the first valve pocket mouth of connection and the first oil inlet passage；
Second pilot valve, one end are against on the second valve pocket mouth, and other end grafting enters in the second oil inlet passage, and in it
The second first via hole equipped with the second valve pocket mouth of connection and the second oil inlet passage, the first first guide cavity where the first pilot valve and
The second first guide cavity where second pilot valve is connected to through the first radial through-hole, and the first first guide cavity connects through overflow ducts and hydraulic fluid port T
It is logical；
Second elastic component is connected between the first pilot valve and damper piston；
Third elastic component is connected between the second pilot valve and damper piston；And
Screw plug is connected on the outside of the damper piston, is connected to the oil discharge passage on damper piston and is lived in the buffering
It fills in the side far from main valve plug and forms third control chamber；The damper piston is downward under the action of third control chamber oil liquid pressure
The second elastic component and third elastic component are compressed, overflow and buffering of the main valve plug under secondary pressure are formed.
In the present invention, it is realized from hydraulic fluid port B to oil by the first clearance channel, the first control chamber, the first pilot valve
The overflow of mouth T.Similarly, it is realized from hydraulic fluid port A to oil by the second clearance channel, the second control chamber, the second pilot valve component
The overflow of mouth T.And in overflow, main valve plug opens buffering under differential pressure action, to realize the buffering and overflow of both direction.
Meanwhile by the first via hole on shuttle valve component and pilot valve, pressure higher in hydraulic fluid port A or hydraulic fluid port B is introduced into third control
Chamber processed pushes damper piston under the action of third control chamber, and the second level for forming the first pilot valve and the second pilot valve is overflow
Flowing pressure reduces shock absorbing to realize the secondary pressure overflow of both direction and reduce valve port buffering, thus impacts more
It is small.In addition, compared with prior art, the secondary pressure pooling feature of the overload of both direction can be completed by a valve body.And
And the composite structure due to not needing to use multiple check valves and overflow valve in the present invention, but can be achieved with by a valve body
Two-way secondary pressure overload buffer, structure is simpler, compact, and processing is also more convenient, cost is lower.
In one embodiment, first pilot valve connects the first control chamber by the first leader channel, described
Second pilot valve connects the second control chamber by the second leader channel, and the valve pocket is located at the first valve pocket of the first pilot valve
Mouth is logical equipped with the overflow being connected to hydraulic fluid port T with upper bit with upper bit and positioned at the second valve pocket mouth of the second pilot valve component
Road.
In one embodiment, first leader channel includes third axially extending bore, the second leader channel packet
Include the first oblique through-hole and the 4th axially extending bore.
In one embodiment, for installing the first pilot valve and the second pilot valve there are two being formed on the valve pocket
The head of the three-stage stepped hole of core, first pilot valve and the second pilot valve is connected to respectively by three-stage stepped hole
On the first valve pocket mouth and the second valve pocket mouth that two hole junctions are formed below.In one embodiment, first pilot valve
Core and the second pilot valve include sequentially connected ball head, slide section, the first bar portion and the second bar portion, wherein slide section
Diameter it is maximum, the diameter of the first bar portion is greater than the diameter of the second bar portion, and the ball head is blocked in the first valve pocket mouth or the
On two valve pocket mouths, the interstitial hole of the slide section and three-stage stepped hole cooperates, second bar portion and the first oil inlet passage or
The cooperation of second oil inlet passage.
In one embodiment, when the pressure of the pressure of hydraulic fluid port A height, hydraulic fluid port B are low, and the oil liquid pressure of hydraulic fluid port A is big
When the active force of third elastic component, the second pilot valve is opened, and oil liquid is through the second clearance channel, the second control chamber, second
Valve pocket mouth flows to hydraulic fluid port T, and main valve plug is opened under differential pressure action, and the oil liquid of hydraulic fluid port A is buffered to hydraulic fluid port B realizes that first class pressure overflows
Stream, while the oil liquid of hydraulic fluid port A enters third control chamber through the second first via hole in the second pilot valve and pushes down on buffering work
Plug compression third elastic component, the pressure of hydraulic fluid port A are gradually increased to second level oil pressure relief.
In one embodiment, when the pressure of the pressure of hydraulic fluid port B height, hydraulic fluid port A are low, and the oil liquid pressure of hydraulic fluid port B is big
When the active force of the second elastic component, the first pilot valve is opened, and oil liquid is through the first clearance channel, the first control chamber, first
Valve pocket mouth flows to hydraulic fluid port T, and main valve plug is opened under differential pressure action, and the oil liquid of hydraulic fluid port B realizes first class pressure to hydraulic fluid port A buffer starting
Overflow, while the oil liquid of hydraulic fluid port B enters third control chamber through the first first via hole in the first pilot valve and pushes down on buffering
Piston compresses the second elastic component, and the pressure of hydraulic fluid port B is gradually increased to second level oil pressure relief.
Compared with prior art, the advantages of two-way secondary pressure rotary buffering valve of the invention, is:
Ingenious setting and connection are carried out by the structure to valve body, main valve plug, valve pocket and damper piston in the present invention, realized
From hydraulic fluid port A to hydraulic fluid port B and from hydraulic fluid port B to the secondary pressure overload buffer function of hydraulic fluid port A both direction.With prior art phase
Than reducing the cumbersome problem of a pile valve body connection bring arrangement and piping connection.And due to only needing a valve body, tie
Structure is more compact, while being greatly reduced cost.Thus relatively uncomplicated additionally, due to valve body structure and spool shape, processing is also square
Just.It can be better adapted to the work of the swing mechanism of other mechanical equipments such as minor crane, mini-excavator, high-altitude operation vehicle
Condition.
Detailed description of the invention
The preferred embodiment of the present invention is described in detail below in conjunction with attached drawing, in figure:
Fig. 1 shows the structural schematic diagram of one of embodiment of two-way secondary pressure rotary buffering valve of the invention；
Fig. 2 shows the hydraulic schematic diagram of two-way secondary pressure rotary buffering valve of the invention.
In attached drawing, identical component uses identical appended drawing reference.The attached drawing is not drawn according to the actual ratio.
Specific embodiment
In order to which technical solution of the present invention and advantage is more clearly understood, below in conjunction with attached drawing to of the invention exemplary
Embodiment is described in more detail.Obviously, the described embodiments are merely a part of the embodiments of the present invention, rather than
The exhaustion of all embodiments.And in the absence of conflict, the feature in the embodiment and embodiment in the present invention can be mutual
It combines.
Inventor is during invention it is noted that generally forming rotary buffering valve by multiple valve members to prevent in the prior art
Overload, causes structural volume more huge and higher cost, unsuitable to be widely used on minor crane.
Against the above deficiency, the embodiment of the present invention proposes a kind of two-way secondary pressure rotary buffering valve, carries out below
Explanation.
It as figure 1 shows one of embodiment of two-way secondary pressure rotary buffering valve of the invention.In the embodiment
In, two-way secondary pressure rotary buffering valve of the invention specifically includes that valve body 1, main valve plug 2, the first elastic component 3, valve pocket 4, delays
Rush piston 8, the first pilot valve component, the second pilot valve component and shuttle valve component.Wherein, valve body 1 is equipped with hydraulic fluid port A, oil
Mouth B and hydraulic fluid port T.Hydraulic fluid port A is located at the lower end of valve body 1, is located on axial direction, hydraulic fluid port B is located at the side of 1 lower end of valve body, hydraulic fluid port T
It is located at the middle part or top of valve body 1.Main valve plug 2 is connected in valve body 1, and main valve plug 2 is equipped with the first gap being connected to hydraulic fluid port B
Channel 2.2 and the second clearance channel 2.1 being connected to hydraulic fluid port A.Valve pocket 4 is connected to the upper end of valve body 1 and the two is fixedly connected.
Valve pocket 4 and main valve plug 2 are formed with the first control chamber 13 and the second control chamber 14.First elastic component 3 is connected to main valve plug 2 and valve pocket
Between 4.First elastic component 3 is located in the second control chamber 14.First control chamber 13 is connected to the first clearance channel 2.2.Second control
Chamber 14 processed is connected to the second clearance channel 2.1.Shuttle valve component 15 is located on damper piston 8, for controlling the first pilot valve group
The cracking pressure of part and the second pilot valve component.First pilot valve component is between the first control chamber 13 and hydraulic fluid port T.The
Two pilot valve components are between the second control chamber 14 and hydraulic fluid port T.
In one embodiment, the first pilot valve component and the second pilot valve component are each provided at damper piston 8 and valve
Between set 4.Wherein, the first pilot valve component connects the first control chamber 13 by the first leader channel 4.3.Second pilot valve
Component connects the second control chamber 14 by the second leader channel 4.2.
In one embodiment, as shown in Figure 1, the first leader channel 4.2 is rendered as third axially extending bore, second is first connected
Road 4.3 is connected and composed by the first oblique through-hole and the 4th axially extending bore.
In one embodiment, as shown in Figure 1, valve pocket 4 is located at the first valve pocket mouth of the first pilot valve component with top
Second valve pocket mouth of position and the second pilot valve component is equipped with the overflow ducts 4.1 being connected to hydraulic fluid port T with upper bit.
In one embodiment, as shown in Figure 1, main valve plug 2 is " ten " character form structure.Wherein, the lower protrusion of main valve plug 2 is supported
It connects and hydraulic fluid port A and hydraulic fluid port B is isolated on the valve port of valve body 1.Formation is connected to hydraulic fluid port B between the lower shoulder of main valve plug 2 and valve body 1
Channel.The upper convex portion of main valve plug 2 and the recess portion of valve pocket 4 are slidably matched and are formed with the second control chamber 14.The upper shoulder of main valve plug 2
Protrusion forms the first control chamber 13 with valve body 1 and under the damper piston of the recess portion two sides of valve pocket 4.
In one embodiment, as shown in Figure 1, the first clearance channel 2.2 be located at main valve plug 2 cross-shaped structure one
The middle part of the first axis through-hole of side, the first axis through-hole is equipped with throttle structure.In one embodiment, as shown in Figure 1,
Two clearance channels 2.1 are the second axially extending bore being located in the middle part of the cross-shaped structure of main valve plug, the middle part of second axially extending bore
Equipped with throttle structure.In addition, in a preferred embodiment, the flow area of the second axially extending bore is greater than first axis through-hole
Flow area.The through flow velocity for being connected to the first clearance channel of hydraulic fluid port B is thus caused to be less than the second of connection hydraulic fluid port A all
The through flow velocity in road, the structure, which is arranged, to be advantageous in that, can be played when hydraulic fluid port A pressure is larger quickly establish control cavity pressure,
Overflow and main valve plug 2 are opened, thus swing mechanism starts fast speed.It can gentle overflow and unlatching when hydraulic fluid port B pressure is larger
Main valve plug 2, swing mechanism rotation are more steady.
In one embodiment, the first pilot valve component mainly includes the first pilot valve 5 and the second elastic component 7.Its
In, the first pilot valve 5 is crimped on the first valve pocket mouth of valve pocket 4 by the second elastic component 7, the first link block 6 by damper piston 8
On.The middle part of first pilot valve 5 is equipped with the first first via hole 5.1, first control chamber of the first first connection of via hole 5.1 13 with
One of oil inlet of shuttle valve component 15.As shown in Figure 1, shuttle valve component 15 is located on damper piston 8, on damper piston 8 also
Equipped with the first oil inlet passage 8.1 and the second oil inlet passage 8.2.The lower end of first pilot valve 5 is connected to the first valve pocket of valve pocket 4
Mouthful, the upper end of the first pilot valve 5 is plugged in the first oil inlet passage 8.1 of stepped hole shape.When hydraulic fluid port B oil inlet, oil liquid warp
First clearance channel 2.2, the first control chamber 13, the first first via hole 5.1 at the middle part of the first pilot valve 5, stepped hole shape the
One oil inlet passage 8.1 enters one of oil inlet of shuttle valve component 15.In one embodiment, the second pilot valve component
Structure is similar to the structural principle of the first pilot valve component.Second pilot valve component mainly includes 10 He of the second pilot valve
Second pilot valve 10 is crimped on valve by third elastic component 12 and the second link block 11 by third elastic component 12, damper piston 8
On second valve pocket mouth of set 4, the middle part of the second pilot valve 10 is equipped with the second first via hole 10.1, and the second first via hole 10.1 connects
Another oil inlet of logical second control chamber 14 and shuttle valve component 15.As shown in Figure 1, the lower end of the second pilot valve 10 is connected to
Second valve pocket mouth of valve pocket 4, the upper end of the second pilot valve 10 are plugged in the second oil inlet passage 8.2 of stepped hole shape.Work as oil
When mouth A oil inlet, oil liquid is through the second first via hole in the middle part of the second clearance channel 2.1, the second control chamber 14, the second pilot valve 10
10.1, the second oil inlet passage 8.2 of stepped hole shape enters another oil inlet of shuttle valve component 15.
In one embodiment, two-way secondary pressure rotary buffering valve of the invention further includes screw plug 9.The screw plug 9 and valve
One end (being upper end in Fig. 1) connection of set 4 far from main valve plug 2.Screw plug 9 be located at the outside of damper piston 8 and with 8 shape of damper piston
At there is third control chamber 16, which is connected to the oil outlet of shuttle valve component 8 by oil discharge passage 8.3.Therefore, exist
Hydraulic fluid port A or when hydraulic fluid port B oil inlet, shuttle valve component 8 may be selected to pass through 8.2 oil inlet shape of the first oil inlet passage 8.1 or the second oil inlet passage
At the pressure of third control chamber 16, the pressure of third control chamber 16 pushes damper piston 8 to move down compression 7 He of the second elastic component
Third elastic component 12 is to control the cracking pressure of the first pilot valve component and the second pilot valve component.In one embodiment
In, as shown in Figure 1, the first first guide cavity where the first pilot valve 5 and the second first guide cavity where the second pilot valve 10 pass through
The connection of first radial through-hole 4.4.In addition, the first first guide cavity is connected to through overflow ducts 4.1 with hydraulic fluid port T.Overflow ducts 4.1 herein
Including the second radial through-hole and an axially extending bore.Valve body 1 is equipped with the circulation passage 1.1 of L-type to be connected to overflow ducts 4.1
With hydraulic fluid port T.
In a preferred embodiment, as shown in Figure 1, two-way secondary pressure rotary buffering valve of the invention mainly wraps
Include: valve body 1, main valve plug 2, the first elastic component 3, valve pocket 4, damper piston 8, the first pilot valve 5, the second elastic component 7, second are first
Guide valve core 10, third elastic component 12, shuttle valve component 15 and screw plug 9.Wherein, valve pocket 4 connect with valve body 1 and is formed with main valve plug 2
There are the first control chamber 13 and the second control chamber 14.First control chamber 13 is connected to the first clearance channel 2.2.Second control chamber 14 with
The connection of second clearance channel 2.1.The first elastic component 3 is equipped between main valve plug 2 and valve pocket 4.It is formed on valve pocket 4 and the first control
The first valve pocket mouth that chamber 13 is connected to and the second valve pocket mouth being connected to the second control chamber 14.Shuttle valve component 15 is located at damper piston
8, damper piston 8 is equipped with the first oil inlet passage 8.1, the second oil inlet passage 8.2 and and the third being connected to shuttle valve component 15
The oil discharge passage 8.3 that control chamber 16 is connected to.The lower end of first pilot valve 5 is against on the first valve pocket mouth, and upper end grafting enters first
In oil inlet passage 8.1.And interior the first guide for being equipped with connection the first valve pocket mouth and the first oil inlet passage 8.1 of the first pilot valve 5
Through-hole 5.1.The lower end of second pilot valve 10 is against on the second valve pocket mouth, and upper end grafting enters in the second oil inlet passage 8.2.And the
The second first via hole 10.1 of the second valve pocket mouth of connection and the second oil inlet passage 8.2 is equipped in two pilot valves 10.Second elasticity
Part 7 is connected between the first pilot valve 5 and damper piston 8.Third elastic component 12 is connected to the second pilot valve 10 and buffering
Between piston 8.Screw plug 9 is connected on the outside of the upper end of damper piston 8, and screw plug 9 is connected to the oil discharge passage 8.3 on damper piston 8
And third control chamber 16 is formed in the upper end of damper piston 8.
In one embodiment, the first pilot valve 5 of installation and the second pilot valve are respectively used to there are two being formed on valve pocket 4
The three-stage stepped hole of core 7.The head of first pilot valve 5 and the second pilot valve 7 is connected to respectively by three-stage stepped hole
On the first valve pocket mouth and the second valve pocket mouth that two hole junctions are formed below.
In one embodiment, the first pilot valve 5 is identical as 7 structure of the second pilot valve, mainly by ball head,
Slide section, the first bar portion and the second bar portion are sequentially connected composition.Wherein the diameter of slide section is maximum.The diameter of first bar portion is greater than
The diameter of second bar portion, ball head block on the first valve pocket mouth or the second valve pocket mouth.Slide section and three-stage stepped hole
Interstitial hole cooperation, the second bar portion and the first oil inlet passage 8.1 or the second oil inlet passage 8.2 cooperate.
In one embodiment, as depicted in figs. 1 and 2, when the pressure of the pressure of hydraulic fluid port A height, hydraulic fluid port B are low, and hydraulic fluid port A
Oil liquid pressure be greater than third elastic component 12 active force when, the second pilot valve 10 is opened, and oil liquid is through the second clearance channel
2.1, the second control chamber 14, the second valve pocket mouth flow to hydraulic fluid port T, and main valve plug 2 is opened under differential pressure action, and the oil liquid of hydraulic fluid port A is to oil
Mouth B buffering realizes first class pressure overflow.Simultaneously the oil liquid of hydraulic fluid port A through the second first via hole 10.1 in the second pilot valve 10 into
Enter third control chamber 16 and push down on damper piston 8 and push third elastic component 12, the pressure of hydraulic fluid port A is gradually increased to second level and overflows
Flowing pressure.
In one embodiment, when the pressure of the pressure of hydraulic fluid port B height, hydraulic fluid port A are low, and the oil liquid pressure of hydraulic fluid port B is greater than
When the active force of the second elastic component 7, the first pilot valve 5 is opened, oil liquid through the first clearance channel 2.2, the first control chamber 13,
First valve pocket mouth flows to hydraulic fluid port T, and main valve plug 2 is opened under differential pressure action, and the oil liquid of hydraulic fluid port B is buffered to hydraulic fluid port A realizes level-one pressure
Power overflow.Simultaneously the oil liquid of hydraulic fluid port B through the first first via hole 5.1 in the first pilot valve 5 enter third control chamber 16 and to
Damper piston 8 is pushed, the pressure of hydraulic fluid port B is gradually increased to second level oil pressure relief.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.Therefore, it includes excellent that the following claims are intended to be interpreted as
Select embodiment and fall into having altered and/or modifying for the scope of the invention, the change that embodiment according to the present invention is made and/
Or modification should be covered by the protection scope of the present invention.
Claims (7)
1. a kind of two-way secondary pressure rotary buffering valve characterized by comprising
Valve body which is provided with hydraulic fluid port A, hydraulic fluid port B and hydraulic fluid port T；
Main valve plug is connected in the valve body, and which is provided with the first clearance channel being connected to hydraulic fluid port B and with hydraulic fluid port A
Second clearance channel of connection, the main valve plug are cross-shaped structure, and the lower protrusion of the main valve plug is connected to the valve body
Hydraulic fluid port A and hydraulic fluid port B is isolated on valve port, forms the channel being connected to hydraulic fluid port B between the lower shoulder and valve body of the main valve plug；
Valve pocket is connect with the valve body, and the upper convex portion of the main valve plug and the recesses fit of valve pocket are simultaneously formed with the second control
Chamber, the upper shoulder and valve body of the main valve plug and the first control chamber of protrusion formation under the valve pocket of the recess portion two sides of valve pocket,
First control chamber is connected to the first clearance channel, and the second control chamber is connected to the second clearance channel；The first clearance channel packet
The first axis through-hole for being located at the side of cross-shaped structure of main valve plug is included, the middle part of the first axis through-hole is equipped with throttle butterfly
Structure；Second clearance channel includes the second axially extending bore being located in the middle part of the cross-shaped structure of main valve plug, and second axial direction is logical
The middle part in hole is equipped with throttle structure；The flow area of second axially extending bore is greater than the flow area of first axis through-hole；Institute
It states and is equipped with the first elastic component between main valve plug and the valve pocket；First be connected to the first control chamber is also formed on the valve pocket
Valve pocket mouth and the second valve pocket mouth being connected to the second control chamber；
Damper piston, which is provided with shuttle valve component and the first oil inlet passage being connected to the shuttle valve component, the second oil inlet lead to
Road and oil discharge passage；
First pilot valve, one end are against on the first valve pocket mouth, and other end grafting enters in the first oil inlet passage, and is equipped in it
It is connected to the first first via hole of the first valve pocket mouth and the first oil inlet passage；
Second pilot valve, one end are against on the second valve pocket mouth, and other end grafting enters in the second oil inlet passage, and is equipped in it
It is connected to the second first via hole of the second valve pocket mouth and the second oil inlet passage, the first first guide cavity and second where the first pilot valve
The second first guide cavity where pilot valve is connected to through the first radial through-hole, and the first first guide cavity is connected to through overflow ducts with hydraulic fluid port T；
Second elastic component is connected between the first pilot valve and damper piston；
Third elastic component is connected between the second pilot valve and damper piston；And
Screw plug is connected on the outside of the damper piston, is connected to the oil discharge passage on damper piston and remote in the damper piston
Side from main valve plug forms third control chamber；The damper piston compresses downwards under the action of third control chamber oil liquid pressure
Second elastic component and third elastic component form overflow and buffering of the main valve plug under secondary pressure.
2. two-way secondary pressure rotary buffering valve according to claim 1, which is characterized in that first pilot valve is logical
It crosses the first leader channel and connects the first control chamber, second pilot valve connects the second control chamber by the second leader channel,
The valve pocket be located at the first valve pocket mouth of the first pilot valve with upper bit and positioned at the second pilot valve the second valve pocket mouth with
Upper bit is equipped with the overflow ducts being connected to hydraulic fluid port T.
3. two-way secondary pressure rotary buffering valve according to claim 2, which is characterized in that the first leader channel packet
Third axially extending bore is included, second leader channel includes the first oblique through-hole and the 4th axially extending bore.
4. two-way secondary pressure rotary buffering valve according to claim 1, which is characterized in that be formed with two on the valve pocket
A three-stage stepped hole for being used to install the first pilot valve and the second pilot valve, first pilot valve and the second guide
The head of spool is connected to the first valve pocket mouth and the second valve pocket mouth formed by two hole junctions below three-stage stepped hole respectively
On.
5. two-way secondary pressure rotary buffering valve according to claim 4, which is characterized in that first pilot valve with
Second pilot valve includes sequentially connected ball head, slide section, the first bar portion and the second bar portion, and wherein slide section is straight
Diameter is maximum, and the diameter of the first bar portion is greater than the diameter of the second bar portion, and the ball head is blocked in the first valve pocket mouth or the second valve
On running-on, the interstitial hole of the slide section and three-stage stepped hole cooperates, second bar portion and the first oil inlet passage or second
Oil inlet passage cooperation.
6. two-way secondary pressure rotary buffering valve according to claim 1, which is characterized in that when the pressure of hydraulic fluid port A is high, oil
When the pressure of mouthful B is low, and when the oil liquid pressure of hydraulic fluid port A is greater than the active force of third elastic component, the second pilot valve is opened, oil
Liquid flows to hydraulic fluid port T through the second clearance channel, the second control chamber, the second valve pocket mouth, and main valve plug is opened under differential pressure action, hydraulic fluid port A
Oil liquid buffered to hydraulic fluid port B and realize first class pressure overflow, while the oil liquid of hydraulic fluid port A is first connected through second in the second pilot valve
Hole enters third control chamber and pushes down on damper piston compression third elastic component, and the pressure of hydraulic fluid port A is gradually increased to second level overflow
Pressure.
7. two-way secondary pressure rotary buffering valve according to claim 1, which is characterized in that when the pressure of hydraulic fluid port B is high, oil
When the pressure of mouthful A is low, and when the oil liquid pressure of hydraulic fluid port B is greater than the active force of the second elastic component, the first pilot valve is opened, oil
Liquid flows to hydraulic fluid port T through the first clearance channel, the first control chamber, the first valve pocket mouth, and main valve plug is opened under differential pressure action, hydraulic fluid port B
Oil liquid to hydraulic fluid port A buffer starting realize first class pressure overflow, while the oil liquid of hydraulic fluid port B through in the first pilot valve first first
Via hole enters third control chamber and pushes down on damper piston the second elastic component of compression, and the pressure of hydraulic fluid port B is gradually increased to second level
Oil pressure relief.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810062989.7A CN108252975B (en) | 2018-01-23 | 2018-01-23 | Two-way secondary pressure rotary buffering valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810062989.7A CN108252975B (en) | 2018-01-23 | 2018-01-23 | Two-way secondary pressure rotary buffering valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108252975A CN108252975A (en) | 2018-07-06 |
| CN108252975B true CN108252975B (en) | 2019-09-20 |
Family
ID=62742261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810062989.7A Active CN108252975B (en) | 2018-01-23 | 2018-01-23 | Two-way secondary pressure rotary buffering valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108252975B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109140000B (en) * | 2018-09-30 | 2023-09-01 | 嘉善海力达工具有限公司 | Two-stage speed limiting mechanism |
| CN113280069B (en) * | 2021-05-24 | 2023-01-17 | 山东华伟液压科技有限公司 | Shock absorber |
| CN114294285A (en) * | 2021-12-26 | 2022-04-08 | 浙江海宏液压科技股份有限公司 | Working valve plate and multi-way valve |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3396635A (en) * | 1966-11-30 | 1968-08-13 | Cessna Aircraft Co | Cushion stop for hydraulic actuators |
| US3872671A (en) * | 1972-05-23 | 1975-03-25 | Verlinde Sa | Control device for a hydraulic drive motor |
| CN2835675Y (en) * | 2005-06-03 | 2006-11-08 | 竺仲鸣 | Two-way buffer valve |
| CN201096115Y (en) * | 2008-01-03 | 2008-08-06 | 常州乙顿液压气动机械制造有限公司 | Hydraulic combined valve |
| CN102022393A (en) * | 2010-12-30 | 2011-04-20 | 常德中联重科液压有限公司 | Rotary valve and rotary control loop using same |
| CN201818576U (en) * | 2010-10-18 | 2011-05-04 | 印辉 | Two-stage pressure rotary cushion valve |
| CN203570734U (en) * | 2013-11-26 | 2014-04-30 | 中联重科股份有限公司渭南分公司 | Balance valve, hydraulic cylinder stretching control loop and hydraulic equipment |
| CN105090154A (en) * | 2015-08-26 | 2015-11-25 | 徐工集团工程机械股份有限公司科技分公司 | Unloading valve block, opening and closing core hydraulic system and engineering machine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100485239C (en) * | 2004-04-16 | 2009-05-06 | 华中科技大学 | Middle high pressure directly-acting hydraulic overflow valve |
| JP2009121627A (en) * | 2007-11-16 | 2009-06-04 | Caterpillar Japan Ltd | Spool position control device of spool valve |
| CN205154794U (en) * | 2015-12-04 | 2016-04-13 | 安徽理工大学 | Overflow valve with pressure regulating and security function |
-
2018
- 2018-01-23 CN CN201810062989.7A patent/CN108252975B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3396635A (en) * | 1966-11-30 | 1968-08-13 | Cessna Aircraft Co | Cushion stop for hydraulic actuators |
| US3872671A (en) * | 1972-05-23 | 1975-03-25 | Verlinde Sa | Control device for a hydraulic drive motor |
| CN2835675Y (en) * | 2005-06-03 | 2006-11-08 | 竺仲鸣 | Two-way buffer valve |
| CN201096115Y (en) * | 2008-01-03 | 2008-08-06 | 常州乙顿液压气动机械制造有限公司 | Hydraulic combined valve |
| CN201818576U (en) * | 2010-10-18 | 2011-05-04 | 印辉 | Two-stage pressure rotary cushion valve |
| CN102022393A (en) * | 2010-12-30 | 2011-04-20 | 常德中联重科液压有限公司 | Rotary valve and rotary control loop using same |
| CN203570734U (en) * | 2013-11-26 | 2014-04-30 | 中联重科股份有限公司渭南分公司 | Balance valve, hydraulic cylinder stretching control loop and hydraulic equipment |
| CN105090154A (en) * | 2015-08-26 | 2015-11-25 | 徐工集团工程机械股份有限公司科技分公司 | Unloading valve block, opening and closing core hydraulic system and engineering machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108252975A (en) | 2018-07-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108252975B (en) | Two-way secondary pressure rotary buffering valve | |
| CN105114381B (en) | Interflow banked direction control valves | |
| CN203856793U (en) | Balance valve and hydraulic cylinder telescoping control loop with same | |
| CN108266431A (en) | A kind of secondary pressure bidirectional relief valve | |
| CN108278236A (en) | A kind of bidirectional buffering overflow valve | |
| CN106051186B (en) | Flow type balanced valve with pooling feature | |
| CN104533863B (en) | Crane rotation system control valve | |
| CN106051185B (en) | A kind of balanced valve built in pooling feature | |
| CN108061071B (en) | Plug-in type bidirectional buffer overflow valve | |
| CN108545612A (en) | A kind of closed system integrates switching valve and control method | |
| CN107725842A (en) | The ratio one-way flow valves of double-direction control | |
| CN106015673B (en) | A kind of balanced valve with pooling feature | |
| CN201096115Y (en) | Hydraulic combined valve | |
| CN110671379A (en) | Flow control type hoist balance valve | |
| CN108775431A (en) | Balanced valve | |
| CN108533553A (en) | A kind of converging valve and its hydraulic system for realizing double constant displacement pump division flow controls | |
| CN104747523B (en) | A kind of lowering velocity limits hydraulic control valve | |
| CN106151143B (en) | Luffing jib maintaining valve | |
| CN109026889B (en) | Buffer overflow valve | |
| KR100814497B1 (en) | Variable flow control logic valve | |
| CN108252976A (en) | A kind of two-way buffer valve | |
| CN108252974B (en) | A kind of compact rotary buffering valve | |
| CN103225633B (en) | Hydraulicdirectional control valve, hydraulicdirectional control valve group and engineering machinery | |
| CN108278237A (en) | Two-way level 2 buffering valve | |
| CN106122144B (en) | The pilot-actuated valve to operate steadily |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190822 Address after: 224500 Panyang Avenue, Dongkan High-tech Industrial Park, Binhai County, Yancheng City, Jiangsu Province Applicant after: Jiangsu Koino Valve Co.,Ltd. Address before: 315000 Room 013, Room 18-1, 035, 555 Juxian Road, Ningbo High-tech Zone, Ningbo City, Zhejiang Province Applicant before: NINGBO WENZE ELECTROMECHANICAL TECHNOLOGY DEVELOPMENT Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Two way two-stage pressure swing buffer valve Effective date of registration: 20220719 Granted publication date: 20190920 Pledgee: Agricultural Bank of China Limited Binhai County sub branch Pledgor: Jiangsu Koino Valve Co.,Ltd. Registration number: Y2022980010768 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |