CN109372812B - Damping pilot valve sleeve control type switch valve - Google Patents
Damping pilot valve sleeve control type switch valve Download PDFInfo
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- CN109372812B CN109372812B CN201811337489.6A CN201811337489A CN109372812B CN 109372812 B CN109372812 B CN 109372812B CN 201811337489 A CN201811337489 A CN 201811337489A CN 109372812 B CN109372812 B CN 109372812B
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- 238000013016 damping Methods 0.000 title claims abstract description 25
- 239000012530 fluid Substances 0.000 claims abstract description 33
- 238000006073 displacement reaction Methods 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000000875 corresponding effect Effects 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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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
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
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Abstract
The invention belongs to the field of fluid transmission and control, and particularly relates to a damping pilot valve sleeve control type switch valve which comprises a valve body and a main valve core, wherein two ends of the valve body are respectively provided with a driving device, an adjusting cavity is formed between the driving device and the main valve core, an oil inlet channel communicated with the adjusting cavity and an oil outlet channel communicated with the adjusting cavity are arranged in the main valve core, fixed damping is arranged in the oil outlet channel, a pilot valve sleeve is arranged outside the main valve core, and the pilot valve sleeve is driven to change the hydraulic pressure of the adjusting cavity at one side to form a hydraulic pressure difference, so that the main valve core is moved. The pilot control type switch valve has the following advantages: 1. the main valve core is driven by hydraulic pressure instead of direct electromagnetic driving, and the driving force is greatly increased; 2. the pilot valve sleeve is designed in the valve body, so that the volume is greatly reduced; 3. the pilot valve sleeve is designed for controlling the pressure of the control cavity at two ends of the main valve, and the flow required by pilot control is very small, so that the driving force for driving the pilot valve sleeve can be very small, the size of the electromagnetic driving device is further reduced, and the purposes of energy conservation and emission reduction are achieved at the same time.
Description
Technical Field
The invention belongs to the field of fluid transmission and control, and particularly relates to a damping pilot valve sleeve control type switch valve.
Background
Fluid control valves, particularly hydraulic valves, function to control flow, pressure and switch oil paths. If the electromagnetic switch valve is used, the flow can be controlled, and the oil way can be switched; the electromagnetic switch valve is divided into the following parts according to the size of the through-current capacity: a single-stage valve direct-acting valve and a two-stage valve pilot control valve. In the industry standard, a single-stage valve direct-acting valve is divided into 6 channels and 10 channels; the larger the valve volume for a higher number of passages, the greater the flow capacity.
The existing typical single-stage electromagnetic switch valve direct-acting valve comprises a valve body, a valve core and an electromagnetic driving device, wherein a high-pressure oil inlet, a low-pressure oil outlet and two control oil ports are arranged on the valve body, the valve core is controlled to axially move in the valve body through the electromagnetic driving device, so that the two control oil ports are respectively communicated with the high-pressure oil inlet and the low-pressure oil outlet or respectively communicated with or mutually separated from the low-pressure oil outlet and the high-pressure oil inlet. In the prior art, the volume and the input current of an electromagnetic driving device are increased to improve the electromagnetic thrust, so that the valve core is pushed.
Fluid control valves for medium and high flow rates are typically in the form of two-stage valves. For a fluid control valve with medium and large flow, because the hydraulic force acting on the valve core when the valve core is opened is too large, the valve core cannot be pushed by overcoming the hydraulic force only by increasing the volume of the electromagnetic driving device. So the current technology is: a small electromagnetic switch valve is generally used as a pilot stage, 6 channels are used for controlling the pressure of a left cavity and a right cavity of a valve core, and the valve core is pushed by hydraulic power, so that the problem of opening the reversing valve under large flow is solved.
Hydrodynamic force: when the spool is not at the null position, i.e., when the control valve is in the open state, fluid will flow through the control valve, and a closing force is generated by the fluid flow that urges the spool toward the null position. It increases with increasing flow and pressure.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a damping pilot valve sleeve control type switch valve.
The technical scheme adopted by the invention is as follows: a damping pilot valve sleeve control type switch valve comprises a valve body and a main valve core, wherein a high-pressure oil inlet, a first control oil port, a second control oil port and a low-pressure oil outlet are arranged on the valve body, the main valve core has a first position which enables the high-pressure oil inlet to be communicated with the first control oil port and the second control oil port to be communicated with the low-pressure oil outlet relative to the valve body in a displacement mode, a second position which enables the high-pressure oil inlet, the first control oil port, the second control oil port and the low-pressure oil outlet to be mutually separated and a third position which enables the high-pressure oil inlet to be communicated with the second control oil port and the first control oil port to be communicated with the low-pressure oil outlet, two ends of the valve body are respectively provided with a driving device, an adjusting cavity is formed between the two ends of the main valve core and the driving device, an oil inlet channel which is communicated with, the main valve core is sleeved with a pilot valve sleeve connected with the driving device, a fixed damping is arranged in the oil outlet channel, the driving device drives the pilot valve sleeve to move or rotate relative to the main valve core so as to close or open the oil inlet channel, or the fixed damping is arranged in the oil inlet channel, and the driving device drives the pilot valve sleeve to move or rotate relative to the main valve core so as to close or open the oil outlet channel.
The valve body is provided with two low-pressure oil outlets which are arranged at two sides, the high-pressure oil inlet is arranged in the middle, a first control oil port and a second control oil port are respectively arranged between the two low-pressure oil outlets and the high-pressure oil inlet, the main valve core is circumferentially and sequentially provided with a first convex ring, a second convex ring, a third convex ring and a fourth convex ring, the first convex ring and the fourth convex ring are positioned at two ends and are in dynamic sealing fit with the valve body, the second convex ring and the third convex ring are respectively arranged corresponding to the first control oil port and the second control oil port, when the main valve core is positioned at a second position, the second convex ring and the third convex ring respectively block the first control oil port and the second control oil port, the oil inlet end of the oil inlet channel is positioned between the second convex ring and the third convex ring, the oil outlet ends are two and are respectively positioned at the outer end of the main valve core opposite to the first convex ring and the outer end of the main valve core opposite to the, the oil outlet channel is divided into two oil outlet channels, the oil inlet of one oil outlet channel is located at the outer end, opposite to the first convex ring, of the main valve core, the oil inlet of the other oil outlet channel is located between the first convex ring and the second convex ring, the oil inlet of the other oil outlet channel is located at the outer end, opposite to the fourth convex ring, of the main valve core, and the oil inlet of the other oil outlet channel is located between the third convex ring and the fourth convex ring.
And a limiting clamp spring is arranged in the valve body, is positioned between the two ends of the main valve core and the driving device and limits the displacement of the two ends of the main valve core.
The pilot valve sleeve comprises a cylindrical main body matched with the periphery of the main valve core, and the driving device controls the pilot valve sleeve to axially displace relative to the main valve core so that the cylindrical main body closes or opens an oil inlet channel or an oil outlet channel.
The driving device comprises an electromagnet and an electromagnetic armature, and when the electromagnet is electrified, the displacement stroke of the pilot valve sleeve is larger than the maximum displacement stroke of the main valve core.
The cylindrical main body extends towards the driving device and is provided with a pin connecting part, and the pin connecting part is fixed with the electromagnetic armature through a pin.
The pilot valve sleeve comprises a cylindrical main body matched with the periphery of the main valve core, a through hole is formed in the cylindrical main body, the driving device controls the pilot valve sleeve to axially rotate relative to the main valve core so that the through hole is communicated or staggered with the oil inlet channel or the oil outlet channel to block the oil inlet channel or the oil outlet channel.
The through hole is a strip-shaped hole arranged along the axial direction of the main valve core.
The end parts of the two ends of the main valve core are connected with positioning pins, and the positioning pins are in sliding fit with the driving device or the main valve core.
The invention has the following beneficial effects: the damping pilot valve sleeve control type switch valve has the following advantages: 1. the main valve core is driven by hydraulic pressure instead of direct electromagnetic driving, and the hydraulic driving force is far greater than the electromagnetic driving force, at present, the driving force of 10 passing through an electromagnet is less than 180N, and the hydraulic driving force can be tens of thousands of N, so that the driving force is greatly increased; 2. the pilot valve sleeve is sleeved outside the two ends of the main valve core, so that the volume is greatly reduced, and the pilot valve sleeve can be ultra-small in size; 3. the pilot valve sleeve is designed for controlling the pressure of the control cavity at two ends of the main valve, and the flow required by pilot control is very small, so that the driving force for driving the pilot valve sleeve can be very small, and when the driving device is an electromagnetic driving device, the volumes and the required power of an electromagnet and an electromagnetic coil in the electromagnetic driving device can be reduced, the volume of the electromagnetic driving device is further reduced, and the purposes of energy conservation and emission reduction are achieved. Therefore, the damping pilot valve sleeve control type switch valve replaces the original single-stage valve used for small flow, the specification size of the electromagnetic driving device can be greatly reduced, the weight and the installation size of the whole fluid control valve are reduced, the control power required by the whole valve is reduced, the external disturbance resistance of the whole valve is improved, and the performance is more stable. When the damping pilot valve sleeve control type switch valve is used for replacing an original two-stage valve used for medium and large flow, the weight and the installation size of the whole fluid control valve can be greatly reduced, the volume of two superposed valves is changed into the volume and the size of a main valve, the cost of the whole valve is reduced, parts are reduced, and the stability of the valve is further improved.
Drawings
FIG. 1 is a schematic structural diagram of a damping pilot valve sleeve controlled switching valve according to an embodiment;
FIG. 2 is a schematic structural view of a main spool;
FIG. 3 is an enlarged view of A in FIG. 1;
fig. 4 is a schematic structural diagram of a pilot valve sleeve according to a first embodiment and a third embodiment;
FIG. 5 is a schematic structural diagram of a second damping pilot valve sleeve controlled switch valve according to an embodiment;
FIG. 6 is an enlarged view of A in FIG. 5;
FIG. 7 is a schematic structural diagram of a control type switch valve with three damping pilot valve sleeves according to an embodiment;
FIG. 8 is an enlarged view of C in FIG. 7;
FIG. 9 is a schematic structural diagram of a four-damping pilot valve sleeve controlled switch valve according to an embodiment;
FIG. 10 is an enlarged schematic view of D in FIG. 9;
in the figure, 1, a valve body; 101, a high-pressure oil inlet; 102, a first control oil port; 103, a second control oil port; 104, a low-pressure oil outlet; 2, main valve core; 201, an oil inlet channel; 202, an oil outlet channel; 206, a first male ring; 207, a second convex ring; 208, a third convex ring; 209, a fourth bulge loop; 3, a driving device; 301, an electromagnet; 302, an electromagnetic armature; 4, limiting the clamp spring; 5, adjusting the cavity; 6, a main valve element return spring; 7, guiding the valve sleeve; 701, a cylindrical body; 702, a pin connection; 703, a through hole; 8, pins; 9, positioning pins; 10, fixing the damping; and 11, a pilot valve sleeve return spring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, which are not described in any more detail in the following embodiments.
The terms of direction and position of the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer to the direction and position of the attached drawings. Accordingly, the use of directional and positional terms is intended to illustrate and understand the present invention and is not intended to limit the scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1, a damping pilot valve sleeve control type switch valve includes a valve body 1 and a main valve core 2, the valve body 1 is provided with a high pressure oil inlet 101, a first control oil port 102, a second control oil port 103, and two low pressure oil outlets 104 with a pressure of 0, the two low pressure oil outlets 104 are disposed at two sides, the high pressure oil inlet 101 is disposed at the middle, the first control oil port 102 and the second control oil port 103 are respectively disposed between the two low pressure oil outlets 104 and the high pressure oil inlet 101, as shown in fig. 2, the main valve core 2 is circumferentially provided with a first convex ring 206, a second convex ring 207, a third convex ring 208, and a fourth convex ring 209, the first convex ring 206 and the fourth convex ring 209 are located at two ends and are in dynamic sealing fit with the valve body 1 to improve the sealing performance and prevent leakage by providing a sealing ring, the second convex ring 207 and the third convex ring 208 are respectively disposed corresponding to the first control oil port 102 and the second control oil port, the main valve element 2 has a first position for communicating the high-pressure oil inlet 101 with the first control port 102 and communicating the second control port 103 with the low-pressure oil outlet 104, a second position for mutually separating the high-pressure oil inlet 101, the first control port 102, the second control port 103 and the low-pressure oil outlet 104, and a third position for communicating the high-pressure oil inlet 101 with the second control port 103 and communicating the first control port 102 with the low-pressure oil outlet 104, when the main valve element 2 is located at the second position, the first control port 102 and the second control port 103 are respectively blocked by the second convex ring 207 and the third convex ring 208. Two ends of the valve body 1 are respectively provided with a driving device 3, and a main valve core reset spring 6 is arranged between the main valve core 2 and the driving device 3.
The driving device 3 comprises an electromagnet 301 and an electromagnet armature 302, when the electromagnet 301 is energized, thrust is formed on the electromagnet armature 302, two ends of the valve body 1 are respectively provided with a driving device 3, an adjusting cavity 5 is formed between the driving device 3 and the main valve element 2, an oil inlet channel 201 communicating the adjusting cavity 5 with the high-pressure oil inlet 101 and an oil outlet channel 202 communicating the adjusting cavity 5 with the low-pressure oil outlet 104 are arranged in the main valve element 2, a fixed damper 10 is arranged in the oil outlet channel 202, as shown in fig. 3, a pilot valve sleeve 7 connected with the driving device 3 is sleeved outside the main valve element 2, the pilot valve sleeve 7 comprises a cylindrical main body 701, and the driving device 3 drives the pilot valve sleeve 7 to displace relative to the main valve element 2 so as to close or open the oil inlet channel 201. A pilot valve sleeve reset spring is arranged between the electromagnet 301 and the electromagnetic armature 302, and when the electromagnet is powered off, the electromagnetic armature and the pilot valve sleeve reset.
When the electromagnet is not electrified, the oil inlet channel 201 is in a closed state, so that the hydraulic pressures at the two ends of the main valve core are both low pressures, and at the moment, the main valve core is located at a second position where the high-pressure oil inlet 101, the first control oil port 102, the second control oil port 103 and the low-pressure oil outlet 104 are mutually separated;
when the left electromagnet is electrified, the left oil inlet channel 201 is in an open state, and due to the action of the fixed damper 8, fluid in the high-pressure oil inlet 101 enters the left adjusting cavity 5, since the flow area of the oil inlet channel 201 is larger than that of the oil outlet channel 202, the hydraulic pressure of the left regulating chamber 5 is increased, the hydraulic balance at the two ends of the main valve core is broken, the main valve core moves rightwards, so that the high-pressure oil inlet 101 is communicated with the second control oil port 103 and the first control oil port 102 is communicated with the low-pressure oil outlet 104, when the left electromagnet is powered off, the left oil inlet channel 201 is closed, fluid in the left adjusting cavity 5 is continuously discharged from the fixed damper, the left adjusting cavity 5 is reduced to low pressure, hydraulic pressures at two ends of the main valve core are restored to be close to balance, and the main valve core returns to a second position where the high-pressure oil inlet 101, the first control oil port 102, the second control oil port 103 and the low-pressure oil outlet 104 are mutually separated under the action of the main valve core reset spring 6.
The electromagnet on the right side is electrified and powered off in the same way.
Wherein, in this embodiment, the hydraulic fluid port on the valve body 1 sets up to two low pressure oil-outs 104 and sets up in both sides, and high-pressure oil inlet 101 sets up in the middle, and first control hydraulic fluid port 102, second control hydraulic fluid port 103 set up respectively between two low pressure oil-outs 104 and high-pressure oil inlet 101, also can set up as follows: two high-pressure oil inlets 101 set up in both sides, low pressure oil-out 104 sets up in the centre, first control hydraulic fluid port 102, second control hydraulic fluid port 103 set up respectively between two high-pressure oil inlets 101 and low pressure oil-out 104, and the pilot valve cover corresponds adjusts, also can realize corresponding effect, and two high-pressure oil inlet pipe ways need be ensured in the external pipeline setting like this, and two low pressure oil outlet pipe ways are comparatively complicated relatively.
In this embodiment, the driving device is an electromagnetic driving device, and conventional driving devices such as a motor, hydraulic pressure, air pressure and the like can also be adopted, but compared with the electromagnetic driving device, the electromagnetic driving device has the advantages of fast response, low energy consumption, small volume and simple structure.
In the embodiment, the electromagnetic armature 302 and the pilot valve sleeve 7 are fixed through the pin 8, so that the structure is simple and the fixation is convenient.
A limiting clamp spring 4 is arranged in the valve body 1, and the limiting clamp spring 4 limits displacement of two ends of the main valve core 2. The two limit clamp springs 4 are respectively located at the outer end of the main valve element 2 opposite to the first convex ring 206 and the outer end of the main valve element 2 opposite to the fourth convex ring 209, and respectively limit the first convex ring 206 and the fourth convex ring 209.
When the electromagnet is electrified, the displacement stroke of the pilot valve sleeve is larger than the maximum displacement stroke of the main valve core. In the figure, the maximum stroke of the main valve core moving leftwards or rightwards to the limiting clamp spring 4 is 3mm, the displacement stroke of the pilot valve sleeve when the pilot valve sleeve is electrified or powered off is 3.5mm, the aperture size of the oil inlet channel 201 is 2mm, and the width of the pilot valve sleeve is larger than 5 mm. When the electromagnet on the left side is powered off, the oil inlet channel 201 is just completely blocked, when the electromagnet on the left side is powered on, the pilot valve sleeve moves 3.5mm to the right, the main valve core moves 3mm to the right under the action of hydraulic pressure, a gap of 5mm is just formed between the pilot valve sleeve and the oil inlet channel 201, and the oil inlet channel 201 is still opened. When the power is off, the width of the pilot valve sleeve ensures that the pilot valve sleeve can still completely block the oil inlet channel 201 when the pilot valve sleeve is displaced 3.5mm to the left under the action of the pilot valve sleeve return spring
Example two:
different from the first embodiment, when the electromagnet 301 is energized, the electromagnetic armature 302 is rotated, the pilot valve sleeve 7 includes a cylindrical main body 701 adapted to the outer periphery of the main valve element, a through hole 703 is formed in the cylindrical main body 701, and the electromagnetic armature 302 rotates to drive the pilot valve sleeve 7 to axially rotate relative to the main valve element 2, so that the through hole 703 is communicated with or staggered from the oil inlet channel 201, thereby blocking the oil inlet channel 201.
When the electromagnet is not electrified, the oil inlet channel 201 is in a closed state, so that the hydraulic pressures at the two ends of the main valve core are both low pressures, and at the moment, the main valve core is located at a second position where the high-pressure oil inlet 101, the first control oil port 102, the second control oil port 103 and the low-pressure oil outlet 104 are mutually separated;
when the left electromagnet is electrified, the left pilot valve sleeve 7 rotates to enable the left oil inlet channel 201 to be in an open state, fluid of the high-pressure oil inlet 101 enters the left adjusting cavity 5 under the action of the fixed damper 8, because the flow area of the oil inlet channel 201 is larger than that of the oil outlet channel 202, the hydraulic pressure of the left adjusting cavity 5 is increased, the hydraulic balance of the two ends of the main valve core is broken, the main valve core moves rightwards, the high-pressure oil inlet 101 is communicated with the second control oil port 103, the first control oil port 102 is communicated with the low-pressure oil outlet 104, when the left electromagnet is powered off, the left pilot valve sleeve 7 rotates to enable the left oil inlet channel 201 to be closed, fluid in the left adjusting cavity 5 is continuously discharged from the fixed damper, the left adjusting cavity 5 is reduced to low pressure, the hydraulic pressure of the two ends of the main valve core is restored to be close to balance, and the main valve core returns to enable, The first control oil port 102, the second control oil port 103 and the low-pressure oil outlet 104 are mutually separated.
The through hole 703 is a strip-shaped hole arranged along the axial direction of the main valve element 2. Thus, the axial displacement of main spool 2 does not affect the communication of through hole 703 or stagger oil inlet passage 201.
Example three:
as shown in fig. 7, an inflow damping pilot valve sleeve control type switch valve includes a valve body 1 and a main valve core 2, the valve body 1 is provided with a high-pressure oil inlet 101, a first control oil port 102, a second control oil port 103, and two low-pressure oil outlets 104 with a pressure of 0, the two low-pressure oil outlets 104 are disposed at two sides, the high-pressure oil inlet 101 is disposed at the middle, the first control oil port 102 and the second control oil port 103 are respectively disposed between the two low-pressure oil outlets 104 and the high-pressure oil inlet 101, as shown in fig. 2, the main valve core 2 is circumferentially provided with a first convex ring 206, a second convex ring 207, a third convex ring 208, and a fourth convex ring 209, the first convex ring 206 and the fourth convex ring 209 are disposed at two ends and are in dynamic sealing fit with the valve body 1 to improve the sealing performance and prevent leakage by providing a sealing ring, the second convex ring 207 and the third convex ring 208 respectively correspond to the, The second control port 103 is arranged, the main valve element 2 has a first position where the high-pressure oil inlet 101 is communicated with the first control port 102 and the second control port 103 is communicated with the low-pressure oil outlet 104 in a displacement manner relative to the valve body 1, a second position where the high-pressure oil inlet 101, the first control port 102, the second control port 103 and the low-pressure oil outlet 104 are separated from each other, and a third position where the high-pressure oil inlet 101 is communicated with the second control port 103 and the first control port 102 is communicated with the low-pressure oil outlet 104, and when the main valve element 2 is located at the second position, the first control port 102 and the second control port 103 are respectively blocked by the second convex ring 207 and the third convex ring 208. Two ends of the valve body 1 are respectively provided with a driving device 3, and a main valve core reset spring 6 is arranged between the main valve core 2 and the driving device 3.
The driving device 3 comprises an electromagnet 301 and an electromagnet armature 302, when the electromagnet 301 is energized, a pulling force is formed on the electromagnet armature 302, two ends of the valve body 1 are respectively provided with a driving device 3, an adjusting cavity 5 is formed between the driving device 3 and the main valve element 2, an oil inlet channel 201 communicating the adjusting cavity 5 with the high-pressure oil inlet 101 and an oil outlet channel 202 communicating the adjusting cavity 5 with the low-pressure oil outlet 104 are arranged in the main valve element 2, a fixed damper 10 is arranged in the oil inlet channel 201, as shown in fig. 8, a pilot valve sleeve 7 connected with the driving device 3 is sleeved outside the main valve element 2, the pilot valve sleeve 7 comprises a cylindrical main body 701, and when the driving device 3 on one side drives the pilot valve sleeve 7 to displace relative to the main valve element 2, the oil outlet channel 202 is closed or opened. A pilot valve sleeve reset spring is arranged between the electromagnet 301 and the electromagnetic armature 302, and when the electromagnet is powered off, the electromagnetic armature and the pilot valve sleeve reset.
When the electromagnet is not electrified, the oil outlet channel 202 is in an open state, and due to the action of the fixed damper 8, the flow area of the oil inlet channel 201 is greatly smaller than that of the oil outlet channel 202, so that the hydraulic pressures at the two ends of the main valve core are low, and at the moment, the main valve core is located at a second position where the high-pressure oil inlet 101, the first control oil port 102, the second control oil port 103 and the low-pressure oil outlet 104 are mutually separated;
when the left electromagnet is powered on, the left oil outlet channel 202 is in a closed state, fluid in the high-pressure oil inlet 101 continuously enters the left adjusting cavity 5 through the fixed damper 8, the hydraulic pressure of the left adjusting cavity 5 rises, the hydraulic balance at two ends of the main valve core is broken, the main valve core moves rightwards to enable the high-pressure oil inlet 101 to be communicated with the second control oil port 103 and the first control oil port 102 to be communicated with the low-pressure oil outlet 104, when the left electromagnet is powered off, the left oil outlet channel 202 is opened, the hydraulic pressure at two ends of the main valve core restores to be balanced, and the main valve core returns to a second position where the high-pressure oil inlet 101, the first control oil port 102, the second control oil port 103 and the low-pressure oil outlet 104 are mutually separated under the action.
The electromagnet on the right side is electrified and powered off in the same way.
Wherein, in this embodiment, the hydraulic fluid port on the valve body 1 sets up to two low pressure oil-outs 104 and sets up in both sides, and high-pressure oil inlet 101 sets up in the middle, and first control hydraulic fluid port 102, second control hydraulic fluid port 103 set up respectively between two low pressure oil-outs 104 and high-pressure oil inlet 101, also can set up as follows: two high-pressure oil inlets 101 set up in both sides, low pressure oil-out 104 sets up in the centre, first control hydraulic fluid port 102, second control hydraulic fluid port 103 set up respectively between two high-pressure oil inlets 101 and low pressure oil-out 104, and the pilot valve cover corresponds adjusts, also can realize corresponding effect, and two high-pressure oil inlet pipe ways need be ensured in the external pipeline setting like this, and two low pressure oil outlet pipe ways are comparatively complicated relatively.
In this embodiment, the driving device is an electromagnetic driving device, and conventional driving devices such as a motor, hydraulic pressure, air pressure and the like can also be adopted, but compared with the electromagnetic driving device, the electromagnetic driving device has the advantages of fast response, low energy consumption, small volume and simple structure.
In the embodiment, the electromagnetic armature 302 and the pilot valve sleeve 7 are fixed through the pin 8, so that the structure is simple and the fixation is convenient.
A limiting clamp spring 4 is arranged in the valve body 1, and the limiting clamp spring 4 limits displacement of two ends of the main valve core 2. The two limit clamp springs 4 are respectively located at the outer end of the main valve element 2 opposite to the first convex ring 206 and the outer end of the main valve element 2 opposite to the fourth convex ring 209, and respectively limit the first convex ring 206 and the fourth convex ring 209.
In the figure, the maximum stroke of the main valve core moving leftwards or rightwards to the limiting clamp spring 4 is 3mm, the displacement stroke of the pilot valve sleeve when the power is on or off is 3.5mm, and the aperture size of the oil outlet channel 202 is 2 mm. When the left side electro-magnet circular telegram, the pilot valve cover shifts 3.5mm to the right, blocks up the oil outlet channel completely just, and the main valve core shifts 3mm to the right under hydraulic effect, when the left side electro-magnet outage, has 5 mm's space just between pilot valve cover and the oil outlet channel 202, opens oil outlet channel. When the electromagnet is electrified, the displacement stroke of the pilot valve sleeve is larger than the maximum displacement stroke of the main valve core.
Example four:
different from the first embodiment, when the electromagnet 301 is energized, the electromagnetic armature 302 is rotated, the pilot valve sleeve 7 includes a cylindrical main body 701 adapted to the outer periphery of the main valve element, a through hole 703 is formed in the cylindrical main body 701, and the electromagnetic armature 302 rotates to drive the pilot valve sleeve 7 to axially rotate relative to the main valve element 2, so that the through hole 703 is communicated or staggered with the oil outlet passage 202, thereby blocking the oil outlet passage 202.
When the electromagnet is not electrified, the oil outlet channel 202 is in an open state, and due to the action of the fixed damper 8, the flow area of the oil inlet channel 201 is greatly smaller than that of the oil outlet channel 202, so that the hydraulic pressures at the two ends of the main valve core are low, and at the moment, the main valve core is located at a second position where the high-pressure oil inlet 101, the first control oil port 102, the second control oil port 103 and the low-pressure oil outlet 104 are mutually separated;
when the left electromagnet is energized, the left pilot valve sleeve 7 rotates to enable the left oil outlet channel 202 to be in a closed state, fluid of the high-pressure oil inlet 101 continuously enters the left adjusting cavity 5 through the fixed damper 8, hydraulic pressure of the left adjusting cavity 5 rises, hydraulic balance at two ends of the main valve core is broken, the main valve core moves rightwards to enable the high-pressure oil inlet 101 to be communicated with the second control oil port 103 and the first control oil port 102 to be communicated with the low-pressure oil outlet 104, when the left electromagnet is de-energized, the left pilot valve sleeve 7 rotates to enable the left oil outlet channel 202 to be opened, hydraulic pressure at two ends of the main valve core restores to balance, and the main valve core returns to a second position where the high-pressure oil inlet 101, the first control oil port 102, the second control oil port 103 and the low-pressure oil outlet 104 are mutually disconnected under the action.
The through hole 703 is a strip-shaped hole arranged along the axial direction of the main valve element 2. Thus, axial displacement of main spool 2 does not affect communication of through-hole 703 or stagger oil outlet passage 202.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (9)
1. The utility model provides a damping pilot valve cover control formula ooff valve, includes valve body (1), main valve core (2), be equipped with high-pressure oil inlet (101), first control hydraulic fluid port (102), second control hydraulic fluid port (103), low pressure oil-out (104) on valve body (1), main valve core (2) are relative valve body (1) displacement has the primary importance that makes high-pressure oil inlet (101) and first control hydraulic fluid port (102) intercommunication and second control hydraulic fluid port (103) and low pressure oil-out (104) intercommunication, makes high-pressure oil inlet (101), first control hydraulic fluid port (102), second control hydraulic fluid port (103), low pressure oil-out (104) the second place that separates absolutely each other, makes high-pressure oil inlet (101) and second control hydraulic fluid port (103) intercommunication and first control hydraulic fluid port (102) and low pressure oil-out (104) the third place that communicates, its characterized in that: the valve is characterized in that two ends of the valve body (1) are respectively provided with a driving device (3), two ends of the main valve core (2) and the driving device (3) form an adjusting cavity (5), an oil inlet channel (201) communicated with the adjusting cavity (5) and the high-pressure oil inlet (101) is arranged in the main valve core (2), an oil outlet channel (202) communicated with the adjusting cavity (5) and the low-pressure oil outlet (104) is arranged in the main valve core (2), a pilot valve sleeve (7) connected with the driving device (3) is sleeved outside the main valve core (2), fixed damping (10) is arranged in the oil outlet channel (202), the driving device (3) drives the pilot valve sleeve (7) to move or rotate relative to the main valve core (2) so as to close or open the oil inlet channel (201), or fixed damping (10) is arranged in the oil inlet channel (201) and the driving device (3) drives the pilot valve sleeve (7) to move or rotate relative to the main valve core (2) so as An oil outlet passage (202) is opened.
2. The damping pilot valve sleeve controlled switching valve according to claim 1, wherein: the hydraulic control valve is characterized in that two low-pressure oil outlets (104) are arranged on the valve body (1), the two low-pressure oil outlets (104) are arranged on two sides, a high-pressure oil inlet (101) is arranged in the middle, a first control oil port (102) and a second control oil port (103) are respectively arranged between the two low-pressure oil outlets (104) and the high-pressure oil inlet (101), a first convex ring (206), a second convex ring (207), a third convex ring (208) and a fourth convex ring (209) are sequentially arranged in the circumferential direction of the main valve core (2), the first convex ring (206) and the fourth convex ring (209) are located at two ends and are in dynamic sealing fit with the valve body (1), the second convex ring (207) and the third convex ring (208) are respectively arranged corresponding to the first control oil port (102) and the second control oil port (103), and when the main valve core (2) is located at the second position, the first control oil port (102) and the second control oil port (208) are respectively blocked by the, The oil inlet end of the oil inlet channel (201) is located between the second convex ring (207) and the third convex ring (208), the oil outlet ends are two and are respectively located at the outer end of the main valve core (2) opposite to the first convex ring (206) and the outer end of the main valve core (2) opposite to the fourth convex ring (209), the oil outlet channels (202) are two, the oil inlet of one oil outlet channel (202) is located at the outer end of the main valve core (2) opposite to the first convex ring (206), the oil inlet is located between the first convex ring (206) and the second convex ring (207), the oil inlet of the other oil outlet channel (202) is located at the outer end of the main valve core (2) opposite to the fourth convex ring (209), and the oil inlet is located between the third convex ring (208) and the fourth convex ring (209).
3. The damping pilot valve sleeve controlled switching valve according to claim 1, wherein: be equipped with spacing jump ring (4) in valve body (1), spacing jump ring (4) are located between main valve core (2) both ends and the drive arrangement and constitute spacingly to the displacement at main valve core (2) both ends.
4. The damped pilot sleeve controlled switching valve according to any one of claims 1 to 3, wherein: the pilot valve sleeve (7) comprises a cylindrical main body (701) matched with the periphery of the main valve core, and the driving device (3) controls the pilot valve sleeve (7) to axially displace relative to the main valve core (2) so that the cylindrical main body (701) closes or opens the oil inlet channel (201) or the oil outlet channel (202).
5. The damped pilot operated sleeve controlled switching valve according to claim 4, wherein: the driving device (3) comprises an electromagnet (301) and an electromagnetic armature (302), and when the electromagnet (301) is electrified, the displacement stroke of the pilot valve sleeve (7) is larger than the maximum displacement stroke of the main valve core (2).
6. The damping pilot valve sleeve controlled switching valve according to claim 5, wherein: the cylindrical main body (701) extends towards the driving device (3) and is provided with a pin connecting part (702), and the pin connecting part (702) is fixed with the electromagnetic armature (302) through a pin (8).
7. The damped pilot sleeve controlled switching valve according to any one of claims 1 to 3, wherein: the pilot valve sleeve (7) comprises a cylindrical main body (701) matched with the periphery of the main valve core, a through hole (703) is formed in the cylindrical main body (701), the pilot valve sleeve (7) is controlled by the driving device (3) to rotate axially relative to the main valve core (2) to enable the through hole (703) to be communicated or staggered with the oil inlet channel (201) or the oil outlet channel (202) so as to block the oil inlet channel (201) or the oil outlet channel (202).
8. The damped pilot operated sleeve controlled switching valve according to claim 7, wherein: the through hole (703) is a strip-shaped hole arranged along the axial direction of the main valve core (2).
9. The damped pilot operated sleeve controlled switching valve according to claim 7, wherein: main valve core (2) both ends end connection has a dowel (9), dowel (9) with drive arrangement (3) or main valve core (2) cooperation that slides.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811337489.6A CN109372812B (en) | 2018-11-12 | 2018-11-12 | Damping pilot valve sleeve control type switch valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811337489.6A CN109372812B (en) | 2018-11-12 | 2018-11-12 | Damping pilot valve sleeve control type switch valve |
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| CN109372812A CN109372812A (en) | 2019-02-22 |
| CN109372812B true CN109372812B (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811337489.6A Active CN109372812B (en) | 2018-11-12 | 2018-11-12 | Damping pilot valve sleeve control type switch valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112112850B (en) * | 2020-09-14 | 2022-08-12 | 宁波华液机器制造有限公司 | Automatic pilot valve structure and pilot-operated relief pressure valve placed in middle |
| CN114738343A (en) * | 2022-03-08 | 2022-07-12 | 江苏菲尔特液压机械有限公司 | Proportional direction valve |
| CN115507201B (en) * | 2022-09-19 | 2025-08-22 | 河南航天流体控制技术有限公司 | A two-way hydraulically controlled two-position four-way reversing solenoid valve and its working method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2506864A1 (en) * | 1975-02-18 | 1976-08-26 | Schneider Co Optische Werke | DIRECTIONAL VALVE |
| JPH10252704A (en) * | 1997-03-14 | 1998-09-22 | Nabco Ltd | Direction switching valve regeneration function |
| CN101560998B (en) * | 2009-05-07 | 2011-04-06 | 刘常芝 | Self-control positioning bidirectional hydraulic change-over valve |
| CN203516929U (en) * | 2013-09-26 | 2014-04-02 | 涌镇液压机械（上海）有限公司 | Electromagnet installation structure of push-pull magnetic exchange valve |
| CN104564881B (en) * | 2014-12-30 | 2016-06-08 | 浙江大学台州研究院 | Spool transfer composite hydraulic excitation controlling valve |
| CN105485376B (en) * | 2016-02-17 | 2018-07-17 | 合肥协力液压科技有限公司 | A kind of engineering truck reversing solenoid valve |
| CN108591156B (en) * | 2018-05-18 | 2020-07-14 | 淮安市君宝液压机械有限公司 | Oil way switching valve |
| CN108757621A (en) * | 2018-08-14 | 2018-11-06 | 三河沃达液压控制系统有限公司 | Indirect control formula digital servo valve |
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