CN108953270A - A kind of control valve - Google Patents
A kind of control valve Download PDFInfo
- Publication number
- CN108953270A CN108953270A CN201810975858.8A CN201810975858A CN108953270A CN 108953270 A CN108953270 A CN 108953270A CN 201810975858 A CN201810975858 A CN 201810975858A CN 108953270 A CN108953270 A CN 108953270A
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- China
- Prior art keywords
- spool
- blind hole
- valve body
- hydraulic fluid
- fluid port
- Prior art date
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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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Multiple-Way Valves (AREA)
Abstract
The present invention proposes a kind of control valve, comprising: valve body, swivel nut, spool, spring.Control valve according to an embodiment of the present invention can be used for Torque Performance of Hydraulic Motor distribution control.
Description
Technical field
The present invention relates to a kind of hydraulic valves, relate in particular to a kind of for controlling the control valve of hydraulic motor.
Background technique
Non-rice habitats are mechanical, such as road roller, mostly use hydraulic motor driving walking.In construction, if road conditions are uneven,
There is vacant state in certain driving wheel, and simple walking fluid power system in parallel makes the hydraulic horse on hanging running gear
Up to short-circuit on hydraulic circuit, running gear skidding, entire vibration hydraulic system pressure moment decline causes road roller can not
Normal walking.If can solve certain using the disengaging oil mass of hydraulic motor of the flow divider-combiner control in hanging driving wheel
Because of the problem of can not vacantly walking, but when road roller is with minor-circle turn, flow divider-combiner controls outer a running gear
Skidding walking apparatus, which will appear to drag, to be turned, and normal walking is unable to.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, an object of the present invention is to provide a kind of control valves that can be used for Torque Performance of Hydraulic Motor distribution control.
A kind of control valve according to an embodiment of the present invention, comprising:
Valve body, the valve body have the valve body blind hole of opening to the left, have on the side wall of the valve body and be spaced from left to right
It arranges and is connected to first hydraulic fluid port of valve body blind hole, the second hydraulic fluid port and third hydraulic fluid port；
Swivel nut, the swivel nut are detachably arranged in the opening that the valve body blind hole is closed on the valve body, the swivel nut
The upper swivel nut blind hole with opening to the right, the aperture of the swivel nut blind hole coaxial and described swivel nut blind hole with the valve body blind hole are small
In the aperture of the valve body blind hole；
Spool, the spool include that can slidingly cooperate the spool main paragraph in the valve body blind hole and be located at
The left side spool undergauge section of the spool main paragraph, the left end of the spool undergauge section are passed through to the left described in the swivel nut and stretching
Outside swivel nut, the spool undergauge section can horizontally slip relative to the swivel nut, and the axial cross section product of the spool main paragraph is institute
2 times that the axial cross section of spool undergauge section accumulates are stated, has on the spool main paragraph and is opened on the spool main paragraph to the right
First spool blind hole of right side and be opened on to the left the spool main paragraph left side the second spool blind hole, described
One spool blind hole includes blind hole body section and the blind hole extension diameter section positioned at the blind hole body section right side, the spool main paragraph
Periphery wall on have the first through-flow slot and the second through-flow slot positioned at the described first through-flow slot left side, the spool main paragraph
It is upper have be connected to the first through-flow slot and the first through flow hole of the second spool blind hole, be connected to the described second through-flow slot and institute
State the second through flow hole of blind hole body section；
Spring, the spring are located in the valve body blind hole, and the left end of the spring is protruded into the blind hole extension diameter section and supported
By the spool, the right end of the spring is against the valve body, and the spring often pushes the spool to the left so that the spool
The left side of main paragraph is against the right side of the swivel nut；
Wherein, in the valve body blind hole, the first control chamber is defined between the right side of the spool and the valve body,
The second control chamber is defined between the left side and the swivel nut of the spool main paragraph, the spool is in first position and second
It can be switched between position.
Advantageously, when the spool is in the first position, the spring pushes the spool so that described to the left
The left side of spool main paragraph against the swivel nut right side and make the right side of the spool far from the valve body blind hole
Bottom surface, the spool are connected to first hydraulic fluid port with second hydraulic fluid port by second circulation groove and the spool part
First hydraulic fluid port is closed on ground, and the spool makes that second hydraulic fluid port and the third hydraulic fluid port disconnect and the spool makes described the
Three hydraulic fluid ports are connected to the described first through-flow slot.
Advantageously, when the spool is in the second position, the spool is overcome the spring by external force
Active force move right the right side for making the left side of the spool main paragraph far from the right side of the swivel nut and making the spool
Against the bottom surface of the valve body blind hole, the spool closes first hydraulic fluid port, the second hydraulic fluid port and institute described in the spool for end face
It states third hydraulic fluid port to be connected to by second circulation groove, the spool partly closes the third hydraulic fluid port and the body portion
Close the first through-flow slot in ground.
Advantageously, the swivel nut is connect with the valve body screw thread.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Fig. 1 is the schematic diagram of control valve according to an embodiment of the invention；
Fig. 2 is the hydraulic schematic diagram of control valve according to an embodiment of the invention；
Fig. 3 is the hydraulic schematic diagram of an application scenarios of control valve according to an embodiment of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings it is described in detail control valve according to an embodiment of the present invention.
As shown in Figure 1 to Figure 3, a kind of control valve according to an embodiment of the present invention, comprising: valve body 1, swivel nut 2, spool 3, bullet
Spring 4.
Specifically, valve body 1 has the valve body blind hole of opening to the left.Have on the side wall of valve body 1 and is spaced cloth from left to right
It sets and is connected to the first hydraulic fluid port of valve body blind hole T, the second hydraulic fluid port A and third hydraulic fluid port P.
Swivel nut 2 is detachably arranged in the opening that the valve body blind hole is closed on valve body 1, has opening to the right on swivel nut 2
Swivel nut blind hole, the aperture of the swivel nut blind hole coaxial and described swivel nut blind hole with the valve body blind hole is less than the valve body blind hole
Aperture.Advantageously, swivel nut 2 is threadedly coupled with valve body 1.
Spool 3 is including can slidingly cooperate the spool main paragraph in the valve body blind hole and be located at the spool
The left side spool undergauge section of main paragraph, the left end of the spool undergauge section pass through the swivel nut to the left and stretch out outside the swivel nut,
Spool undergauge section can horizontally slip relative to swivel nut 2, and the axial cross section product of the spool main paragraph is the spool undergauge section
2 times of axial cross section product, have the first valve of the right side for being opened on the spool main paragraph to the right on the spool main paragraph
Core blind hole 31 and be opened on to the left the spool main paragraph left side the second spool blind hole 32, the first spool blind hole 31 packet
Blind hole body section and the blind hole extension diameter section positioned at the blind hole body section right side are included, is had on the periphery wall of the spool main paragraph
There are the first through-flow slot 33 and the second through-flow slot 34 positioned at first through-flow 33 left side of slot, there is connection on the spool main paragraph
First through-flow slot 33 and the first through flow hole 3a of the second spool blind hole 32, it is connected to the second through-flow slot 34 and the second of blind hole body section
Through flow hole 3b.
Spring 4 is located in the valve body blind hole, and the left end of spring 4 protrudes into the blind hole extension diameter section and against spool 3, spring
4 right end often pushes spool 3 to the left so that the left side of the spool main paragraph is against swivel nut 2 against the valve body 1, spring 4
Right side.
Wherein, in the valve body blind hole, the first control chamber 1a is defined between the right side and valve body 1 of spool 3, it is described
The second control chamber 1b is defined between the left side and swivel nut 2 of spool main paragraph.Spool 3 can between first position and the second position
Switching.
More specifically, spring 4 pushes spool 3 to the left so that the spool main body when spool 3 is in the first position
The left side of section against swivel nut 2 right side and make the right side of spool 3 far from the bottom surface of the valve body blind hole, spool 3 makes the
One hydraulic fluid port T is connected to the second hydraulic fluid port A by the second circulation groove 34 and spool 3 partly closes the first hydraulic fluid port T, and spool 3 makes second
Hydraulic fluid port A is disconnected with third hydraulic fluid port P and spool 3 is connected to third hydraulic fluid port P with the first through-flow slot 33.
When spool 3 is in the second position, spool 3 is overcome the active force of spring 4 to move right by external force
Make the left side of the spool main paragraph far from the right side of swivel nut 2 and makes the right side of spool 3 against the valve body blind hole
Bottom surface, spool 3 are closed the first hydraulic fluid port T, 3 second hydraulic fluid port A of spool and third hydraulic fluid port P and are connected to by the second circulation groove 34, and spool 3
Divide ground closing third hydraulic fluid port P and valve body 1 partly closes the first through-flow slot 33.
The working principle of inserted valve according to an embodiment of the present invention is as follows:
As shown in Figure 1, the axial cross section product S1 of the spool main paragraph is the axial cross section product S2 of the spool undergauge section
2 times,
The oil liquid pressure of third hydraulic fluid port P enters the second control chamber 1b after the first through flow hole 3a, the second spool blind hole 32, makees
With the thrust generated on the left side of spool 3 to the right (active area of the left side of spool 3 is S1-S2).Third hydraulic fluid port P pressure
Power is set as P1。
The pressure of second hydraulic fluid port A (is set as P2) after the second through flow hole 3b, the first spool blind hole 31 enter the first control
Chamber 1a is applied on spool 3 thrust generated together with spring 4 to the left, is applied on spool 3 to the left with third hydraulic fluid port P pressure
Thrust contends with.That is P1× S1=P2(KX is the active force of spring 4 to × (S1-S2)+KX, and wherein K is the stubborn system of spring 4
Number, X are the displacement of spring 4).
Spring 4 in the present invention only plays reset role, and the thrust generated on spool 3 is acted on relative to oil liquid pressure very
It is small, therefore the active force of spring 5 can be ignored.It is then P after above equation abbreviation due to S1/S2=0.52=0.5P1。
After spool 3 reaches equilibrium state, the pressure of the second hydraulic fluid port A of control is the half of third hydraulic fluid port P pressure.If the
Two hydraulic fluid port A pressure are less than 0.5P1, then spool 3 moves right, increase the connection area of the through-flow slot 34 of third hydraulic fluid port P and second, into
And increase the flow for flowing into the second hydraulic fluid port A to increase the second hydraulic fluid port A pressure, until the second hydraulic fluid port A pressure is equal to 0.5P1；If
Second hydraulic fluid port A pressure is greater than 0.5P1, then spool 3 is moved to the left, reduce the connection area of the through-flow slot 34 of third hydraulic fluid port P and second,
And then reduce the flow of the second hydraulic fluid port A of inflow to reduce the pressure of the second hydraulic fluid port A, until the second hydraulic fluid port A pressure is equal to 0.5P1。
As shown in figure 3, in use, third hydraulic fluid port P of the invention is passed through the first check valve 8 and second one-way valve 9
Setting, is connected with the oil outlet of two-way closed hydraulic pump 13 always, front-wheel drive motor 6, rear wheel drive motor 7, two-way closed
13 three of hydraulic pump connects, between the second hydraulic fluid port A connection of the invention and front-wheel drive motor 6 and rear wheel drive motor 7
Oil circuit on, the first hydraulic fluid port T by the setting of third check valve 10 and the 4th check valve 11 always with two-way closed hydraulic pump 13
Inlet port communicate.By the description of front it is found that if two-way closed hydraulic pump 13 rotates forward in this circuit, that is, C mouthfuls
For oil outlet, then present invention can ensure that C mouthfuls with pressure difference=second hydraulic fluid port A of the second hydraulic fluid port A and D mouthful of pressure difference, namely guarantee
Front-wheel drive motor 6 inlet outlet pressure differential and 7 inlet outlet pressure differential of rear wheel drive motor are equal, and Torque Performance of Hydraulic Motor=inlet and outlet
Pressure difference × discharge capacity, therefore it can be concluded that front-wheel drive motor is big as always with the output torque of rear wheel drive motor.Therefore work as
Two drive motors have one when skidding, and control through the invention will not be such that another output torque reduces, and then not
It can skid.
In addition, when road roller is turned to, it is assumed that front-wheel drive motor 6 is in outside, and rear wheel drive motor 7 is in interior
Side, then the revolving speed of front-wheel drive motor 6 is greater than the revolving speed of rear wheel drive motor 7, therefore the flow that front-wheel drive motor 6 needs is big
In the flow that rear wheel drive motor 7 needs, the present invention can satisfy the flow of supply front-wheel drive motor 6, and flow through front wheel driving
Flow after dynamic motor 6 makes the pressure of the second hydraulic fluid port A be greater than 0.5P after entering the second hydraulic fluid port A1, the pressure of the first control chamber 1a and
4 collective effect of spring moves downward spool 3, until spool 3 reaches new equilibrium state, flows through rear wheel drive motor 7 in this way
Flow be less than front-wheel drive motor 6 flow, will not drag and turn phenomenon.
When road roller is turned to, if front-wheel drive motor 6 is in inside, rear wheel drive motor 7 is in outside, then
After the revolving speed of front-wheel drive motor 6 is less than the revolving speed of rear wheel drive motor 7, therefore the flow of the needs of front-wheel drive motor 6 is less than
The flow that wheel-drive motor 7 needs, the present invention can satisfy the flow of supply rear-wheel wheel-drive motor 7, and flow through front-wheel drive
Flow after motor 6 makes the pressure of the second hydraulic fluid port A be less than 0.5P after entering the second hydraulic fluid port A1, spool 3 moves right, and keeps third oily
Mouthful P, the second hydraulic fluid port A connection area increase, and until spool 3 reaches new equilibrium state, flow through the stream of rear wheel drive motor 7 in this way
Amount is that the flow of front-wheel drive motor 6 flows into the flow of the second hydraulic fluid port A plus third hydraulic fluid port P, will not drag and turn phenomenon.
The present invention has the advantages that (1) plug-in designs, it is volume compact, simple and reasonable, at low cost.It (2) can be real
Flow when now controlling the anti-slip of non-rice habitats machinery, and not influencing turning, which will not drag, turns phenomenon.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more, unless separately
There is clearly specific restriction.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are within the scope of the invention to above-mentioned implementation
Example be changed, modify, replacement and variant, each fall within protection scope of the present invention.
Claims (4)
1. a kind of control valve characterized by comprising
Valve body, the valve body have the valve body blind hole of opening to the left, have arranged for interval from left to right on the side wall of the valve body
And it is connected to first hydraulic fluid port of valve body blind hole, the second hydraulic fluid port and third hydraulic fluid port；
Swivel nut, the swivel nut are detachably arranged in the opening for closing the valve body blind hole on the valve body, have on the swivel nut
There is the swivel nut blind hole of opening to the right, the aperture of the swivel nut blind hole coaxial and described swivel nut blind hole with the valve body blind hole is less than institute
State the aperture of valve body blind hole；
Spool, the spool include that can slidingly cooperate the spool main paragraph in the valve body blind hole and be located at described
The left side spool undergauge section of spool main paragraph, the left end of the spool undergauge section passes through the swivel nut to the left and stretches out the swivel nut
Outside, the spool undergauge section can horizontally slip relative to the swivel nut, and the axial cross section product of the spool main paragraph is the valve
2 times of the axial cross section product of core undergauge section, have the right end for being opened on the spool main paragraph to the right on the spool main paragraph
The first spool blind hole in face and be opened on to the left the spool main paragraph left side the second spool blind hole, first valve
Core blind hole includes blind hole body section and the blind hole extension diameter section positioned at the blind hole body section right side, the spool main paragraph it is outer
There is the first through-flow slot and the second through-flow slot positioned at the described first through-flow slot left side on peripheral wall, have on the spool main paragraph
Have the connection first through-flow slot and the first through flow hole of the second spool blind hole, be connected to the described second through-flow slot with it is described blind
Second through flow hole of hole body section；
Spring, the spring are located in the valve body blind hole, and the left end of the spring protrudes into the blind hole extension diameter section and against institute
Spool is stated, the right end of the spring is against the valve body, and the spring often pushes the spool to the left so that the spool main body
The left side of section is against the right side of the swivel nut；
Wherein, in the valve body blind hole, the first control chamber is defined between the right side of the spool and the valve body, it is described
The second control chamber is defined between the left side of spool main paragraph and the swivel nut, the spool is in first position and the second position
Between can be switched.
2. control valve according to claim 1, which is characterized in that described when the spool is in the first position
Spring push the spool to the left so that the spool main paragraph left side against the swivel nut right side and make the valve
Bottom surface of the right side of core far from the valve body blind hole, it is described that the spool passes through first hydraulic fluid port and second hydraulic fluid port
The second circulation groove connection and spool partly closes first hydraulic fluid port, the spool make second hydraulic fluid port and described the
Three hydraulic fluid ports disconnect and the spool is connected to the third hydraulic fluid port with the described first through-flow slot.
3. control valve according to claim 1, which is characterized in that described when the spool is in the second position
Spool is overcome the active force of the spring to move right by external force makes the left side of the spool main paragraph far from described
The right side of swivel nut simultaneously makes the right side of the spool against the bottom surface of the valve body blind hole, spool closing first oil
Mouthful, the second hydraulic fluid port described in the spool is connected to the third hydraulic fluid port by second circulation groove, and the spool partly seals
Close the described first through-flow slot with closing the third hydraulic fluid port and the body portion.
4. control valve according to claim 1, which is characterized in that the swivel nut is connect with the valve body screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810975858.8A CN108953270B (en) | 2018-08-24 | 2018-08-24 | Control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810975858.8A CN108953270B (en) | 2018-08-24 | 2018-08-24 | Control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108953270A true CN108953270A (en) | 2018-12-07 |
| CN108953270B CN108953270B (en) | 2020-06-30 |
Family
ID=64473189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810975858.8A Active CN108953270B (en) | 2018-08-24 | 2018-08-24 | Control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108953270B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111075706A (en) * | 2019-12-26 | 2020-04-28 | 宁波真格液压科技有限公司 | Control valve for reciprocating pump and reciprocating pump comprising same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2406573A1 (en) * | 1973-02-12 | 1974-08-15 | Poclain Sa | SYSTEM FOR SUPPLYING TWO ENERGY CONVERTERS WITH A PRESSURIZED FLUID |
| DE19632368A1 (en) * | 1996-08-10 | 1998-02-12 | Bosch Gmbh Robert | Electrohydraulic regulation path valve for controlling hydraulic setting motor |
| CN1313932A (en) * | 1999-06-10 | 2001-09-19 | 日立建机株式会社 | Volume control valve of variable displacement hydraulic rotating machine |
| CN201322116Y (en) * | 2008-08-08 | 2009-10-07 | 宁波市鄞州通力液压电器厂 | Proportional pressure-reducing valve |
| CN201539460U (en) * | 2009-06-24 | 2010-08-04 | 广西柳工机械股份有限公司 | Mass flow hydraulic drive two-position three-way directional valve |
| CN202091555U (en) * | 2011-06-07 | 2011-12-28 | 中国电子科技集团公司第十八研究所 | Slide-valve-type two-position and three-way reversing valve |
| CN106286448A (en) * | 2016-10-09 | 2017-01-04 | 无锡市钻通工程机械有限公司 | A kind of tandem hydraulic loop |
| CN207406559U (en) * | 2017-11-14 | 2018-05-25 | 浙江华益精密机械股份有限公司 | Torque distributing valve and wheel walking hydraulic control system |
-
2018
- 2018-08-24 CN CN201810975858.8A patent/CN108953270B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2406573A1 (en) * | 1973-02-12 | 1974-08-15 | Poclain Sa | SYSTEM FOR SUPPLYING TWO ENERGY CONVERTERS WITH A PRESSURIZED FLUID |
| DE19632368A1 (en) * | 1996-08-10 | 1998-02-12 | Bosch Gmbh Robert | Electrohydraulic regulation path valve for controlling hydraulic setting motor |
| CN1313932A (en) * | 1999-06-10 | 2001-09-19 | 日立建机株式会社 | Volume control valve of variable displacement hydraulic rotating machine |
| CN201322116Y (en) * | 2008-08-08 | 2009-10-07 | 宁波市鄞州通力液压电器厂 | Proportional pressure-reducing valve |
| CN201539460U (en) * | 2009-06-24 | 2010-08-04 | 广西柳工机械股份有限公司 | Mass flow hydraulic drive two-position three-way directional valve |
| CN202091555U (en) * | 2011-06-07 | 2011-12-28 | 中国电子科技集团公司第十八研究所 | Slide-valve-type two-position and three-way reversing valve |
| CN106286448A (en) * | 2016-10-09 | 2017-01-04 | 无锡市钻通工程机械有限公司 | A kind of tandem hydraulic loop |
| CN207406559U (en) * | 2017-11-14 | 2018-05-25 | 浙江华益精密机械股份有限公司 | Torque distributing valve and wheel walking hydraulic control system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111075706A (en) * | 2019-12-26 | 2020-04-28 | 宁波真格液压科技有限公司 | Control valve for reciprocating pump and reciprocating pump comprising same |
| CN111075706B (en) * | 2019-12-26 | 2023-10-31 | 宁波真格液压科技有限公司 | Control valve for reciprocating pump and reciprocating pump comprising same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108953270B (en) | 2020-06-30 |
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