CN111550578A - Valve core and hydraulic valve comprising same - Google Patents
Valve core and hydraulic valve comprising same Download PDFInfo
- Publication number
- CN111550578A CN111550578A CN202010496918.5A CN202010496918A CN111550578A CN 111550578 A CN111550578 A CN 111550578A CN 202010496918 A CN202010496918 A CN 202010496918A CN 111550578 A CN111550578 A CN 111550578A
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- Prior art keywords
- axial
- valve
- groove
- radial hole
- oil
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Classifications
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- 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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/08—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks
- F16K11/085—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with cylindrical plug
- F16K11/0856—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with cylindrical plug having all the connecting conduits situated in more than one plane perpendicular to the axis of the plug
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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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- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
- F16C32/0629—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a liquid cushion, e.g. oil cushion
- F16C32/064—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a liquid cushion, e.g. oil cushion the liquid being supplied under pressure
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Multiple-Way Valves (AREA)
Abstract
The disclosure relates to a valve core and a hydraulic valve comprising the same, belonging to the technical field of hydraulic valves, wherein a first annular groove, a second annular groove and a third annular groove are arranged on the outer surface of the valve core; a first axial groove and a second axial groove are arranged on the surface of the valve core along the axial direction in a circumferential array; the first axial groove is connected with the first annular groove; the second axial groove is connected with the second annular groove; a first radial hole, a second radial hole and a third radial hole are formed in the radial direction of the valve core; the first radial hole is connected with the first annular groove; the third radial hole is communicated with the third annular groove, the first radial hole is connected with the third radial hole through the axial hole, and the central hole of the valve body is connected with the second annular groove through the second radial hole; the valve core is rotatably arranged in the valve body, the hydraulic valve can realize high-frequency opening and closing control, and the control complexity and the existing difficulty of the high-frequency opening and closing axial movement of the slide valve are solved.
Description
Technical Field
The disclosure belongs to the technical field of hydraulic valves, and particularly relates to a valve core and a hydraulic valve comprising the same.
Background
The statements herein merely provide background related to the present disclosure and may not necessarily constitute prior art.
At present, a rotary valve realizes the cutting of an oil way by rotating a valve core and realizes the combined action of a left rotary oil cylinder and a right rotary oil cylinder; but the rotating speed is low (0.25r/s), and the valve core is in small clearance fit with the shell; if the rotation speed is high, the direct rotation friction problem between the valve core and the housing, the oil film lubrication problem and the dynamic balance problem are caused, and the three aspects limit the high-speed operation of the rotary valve. The axial movement of a common reversing valve (slide valve) realizes the closing of an oil way, the reversing frequency of the reversing valve used in the current hydraulic pipeline or oil cylinder pulse test is 1Hz, and the reversing efficiency is low.
Disclosure of Invention
To overcome the disadvantages in the prior art, the present disclosure provides a valve core and a hydraulic valve including the same.
At least one embodiment of the present disclosure discloses a valve element, wherein a first annular oil groove, a second annular oil groove and a third annular oil groove are arranged on the outer surface of the valve element at intervals; a first axial groove and a second axial groove are arranged on the surface of the valve core along the axial direction in a circumferential array; the first axial groove is connected with the first annular groove; the second axial groove is connected with the second annular groove; a first radial hole, a second radial hole, a third radial hole and a fourth radial hole are formed in the radial direction of the valve core; the first radial hole is connected with the first annular groove; the third radial hole is communicated with the third annular groove, the first radial hole is connected with the third radial hole through the axial hole, and the central hole of the valve body is connected with the second annular groove through the second radial hole and communicated with the outer surface of the valve core through the fourth radial hole.
Preferably, the first axial grooves and the second axial grooves are distributed in a staggered mode in the axial direction of the valve core.
As the preferred scheme, one end of the axial hole is provided with a process plug.
The disclosure also discloses a hydraulic valve, which comprises a valve body and any one of the valve cores; the valve core is rotatably arranged in the valve body; an oil inlet, a first oil outlet, a second oil outlet and a third oil outlet are formed in the outer surface of the valve body; the oil inlet is connected with the first annular groove; the circle centers of the first oil outlet and the second oil outlet are positioned on the same cross section vertical to the axis of the valve core, and the cross section is provided with a first axial oil groove and a second axial oil groove; the third oil outlet is connected with the second annular groove.
Preferably, both ends of the valve core in the axial direction are fixed in the valve body through a first bearing and a second bearing respectively.
As a preferred scheme, one end of the valve body in the length direction is provided with a first end cover for fixing a first bearing; the other end of the bearing is fixed on a second bearing through a second end cover; a check ring is arranged between the second end cover and the second bearing; the second end cover and the valve core are in rotary seal.
Preferably, the second end cover is connected with a driving motor, and a rotating shaft of the driving motor penetrates through the second end cover to be connected with the valve core.
The beneficial effects disclosed by the above embodiment are as follows:
(1) hydraulic oil can get into from first ring channel and divide into the twice in this disclosed case, and wherein partly radial hole on through the ring channel, inside axial hole flows out from the third ring channel, plays lubricated effect to the rotation of case, and the second part can flow out from the second ring channel through inside centre bore, inside radial hole simultaneously and has realized the circulation of oil circuit.
(2) The hydraulic valve can realize high-frequency opening and closing control, and solves the problems of complexity and difficulty in controlling axial movement of the sliding valve in a high-frequency opening and closing manner;
(3) the rotary valve core of the hydraulic valve is connected with the valve body through the bearing, and the problem of friction between the valve core and the shell due to high-frequency axial movement of the slide valve or rotary valve rotary movement is solved.
(4) The hydraulic valve bearing disclosed by the invention is lubricated by leakage of pressure oil, and meanwhile, the pressure oil forms a lubricating oil film between the rotary valve core and the valve body, and the axial groove pressure oil and the annular channel pressure oil can play a static pressure bearing balance supporting role on the valve core.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
FIG. 1 provides a block diagram of a hydraulic valve for an embodiment of the present disclosure;
FIG. 2 provides a block diagram of a valve spool within a hydraulic valve according to an embodiment of the present disclosure;
FIG. 3 provides a longitudinal direction top sectional view of a hydraulic valve according to an embodiment of the present disclosure;
FIG. 4 provides a cross-sectional view of a hydraulic valve in a horizontal direction in accordance with an embodiment of the present disclosure;
FIG. 5 provides a hydraulic valve operating schematic for an embodiment of the present disclosure.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
In the description of the present disclosure, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present disclosure and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present disclosure.
As shown in fig. 1 to 3, the hydraulic valve disclosed in this embodiment mainly includes a valve body 2 and a valve element 1 disposed inside the valve body, two ends of the valve element in the length direction are respectively connected through a bearing 3, two ends of the valve body are provided with a left end cover 10 and a right end cover 8, wherein the left end cover 10 of the valve body is used for fixing a left bearing, a first static seal 11 is disposed between the left end cover and the left bearing, the right end cover 8 of the valve body is used for fixing a right bearing, and a second static seal 4 is also disposed between the right end cover and the right bearing, so that the valve element can rotate in the valve body.
In order to realize the rotation of the valve core, the right end cover is connected with the driving motor 6 through a motor support in the embodiment, and it can be understood that the motor support is fixed on the right end cover through a bolt, and the output shaft of the driving motor 6 penetrates through the right end cover to be connected with the valve core 1.
As shown in fig. 2, the valve core 1 of the present embodiment is provided with a first annular oil groove 101, a second annular oil groove 103 and a third annular oil groove 105 from left to right in the length direction, the three annular grooves are arranged at intervals, wherein the widths of the first annular oil groove 101 and the second annular oil groove 103 are the same, the width of the third annular oil groove 105 is smaller than that of the first annular oil groove 101 and the second annular oil groove 103, a plurality of first axial oil grooves 102 and second axial oil grooves 104 are uniformly arranged on the surface of the valve core between the first annular oil groove 101 and the second annular oil groove 103, and the axial oil grooves are arranged on the outer surface of the valve core in a circumferential array. The number of the first axial oil grooves 102 and the second axial oil grooves 104 is not limited to 3, and may be 2 or more, but must be uniformly distributed.
It should be noted that, as shown in fig. 2, the first axial oil groove 102 and the second axial oil groove 104 extend in opposite directions and over the same distance, and on a certain longitudinal section perpendicular to the axis of the spool in the middle of the spool, there are both the first axial oil groove 102 and the second axial oil groove 104 in the circumferential direction of the section.
Further, the first axial oil groove 102 communicates with the first annular oil groove 101, and the second axial oil groove 104 communicates with the second annular oil groove 103, as shown in fig. 1 and 4, the valve body is provided with a center oil hole 107, and the center oil hole 107 does not penetrate through both end surfaces of the valve body in the length direction, but penetrates from the left end surface to the inside, is connected with the second annular oil groove 103 through the second radial hole 108, and then communicates with the outside of the valve body through the fourth radial hole 110.
Further, as shown in fig. 3 to 4, a first radial hole 106, a second radial hole 108, and a third radial hole 109 are provided in the valve core in the present embodiment in the radial direction, wherein the first radial hole 106 communicates with the first annular oil groove 102, the second radial hole 108 communicates with the second annular oil groove 102, and the third radial hole 109 communicates with the third annular oil groove 103.
An axial hole 111 is also arranged in the valve core; the first radial hole 106 is connected with the third radial hole 109 through an axial hole 111, the axial hole 110 is parallel to the inner central hole 107, and the process plug 7 is arranged on the axial hole 110, so that the hydraulic oil flowing into the axial hole 111 can be prevented from flowing out.
P, T, A, B four oil ports are arranged on the valve body 2, wherein the port P is communicated with the first annular oil passage 101 in the rotary valve core 1, and the port T is communicated with the second annular oil passage 103 in the rotary valve core 1; A. the ports B are distributed on the valve body 2 at a certain angle, that is, the distribution angle is 360/(the number of the axial oil grooves 102 + the number of the axial oil grooves 104), the center of a circle of the port A, B is on the same cross section perpendicular to the axis of the valve element, and the cross section is provided with the axial oil grooves 102 and the axial oil grooves 104, that is, when the valve element rotates, the ports a or B are communicated with each other by the axial oil grooves, regardless of the first axial oil grooves or the second axial oil grooves.
The specific working principle of the hydraulic valve is as follows:
as shown in fig. 3 to 4, the pressure oil enters the first annular oil groove 101 and the first axial oil groove 102 through the port P of the valve body 2; part of the pressure oil enters the third annular oil passage 105 through the first radial hole 106, the axial hole 111 and the radial hole 109; the pressure oil in the third annular oil passage 105 forms static pressure support, and leaks into the spaces of the second annular oil passage 103, the bearing 3 and the rotary seal 5 through the fit clearance between the valve body 2 and the rotary valve core 1, so that a lubricating oil film between the rotary valve core 1 and the valve body 2 is formed on one hand, and the bearing 3 is lubricated on the other hand. Meanwhile, the pressure oil of the first annular oil groove 101 leaks to the left bearing through the fit clearance between the rotary valve core 1 and the valve body 2, so that lubrication is provided. Left bearing lubrication leakage oil returns to the oil tank through the central hole 107, the second radial hole 108, the second annular oil groove 103 and the port of the valve body T. Lubricating leakage oil between the right bearing and the rotary seal 5 returns to the oil tank through the fourth radial hole 110, the central hole 107 and the second radial hole 108 through the second annular oil passage 103 and the port of the valve body T. The phenomenon that the lubricating leakage oil of the bearings on the two sides forms high pressure due to oil trapping is avoided.
Specifically, as shown in fig. 5, when the driving device 6 connected to the valve body drives the rotary valve core 1 to rotate a certain angle (e.g. left side view), the pressure oil is led to the port a of the valve body through the port P of the valve body, the first annular oil passage 101 of the rotary valve core 1, and the first axial oil groove 102, so as to form P, A intercommunication; at the moment, the port B of the valve body is communicated with the port T of the valve body through a second axial oil groove 104 and a second annular oil channel 103 of the rotary valve core 1 to form B, T intercommunication;
when the driving device 6 drives the rotary valve core 1 to rotate for a certain angle (such as a middle position diagram), pressure oil is sealed through a valve body P port, the first annular oil channel 101 and the first axial oil groove 102 of the rotary valve core 1, so that P, A are not communicated with each other; meanwhile, the T port of the valve body, the rotary valve core 1, the second annular oil channel 103 and the second axial oil groove 104 are closed, so that B, T are not communicated with each other;
when the driving device 6 drives the rotary valve core 1 to rotate for a certain angle (such as a right side view), pressure oil is led to a valve body B port through a valve body P port, a first annular oil channel 101 and an axial oil groove 102 of the rotary valve core 1 to form P, B intercommunication; at the moment, the port A of the valve body is communicated with the port T of the valve body through an axial oil groove 104 and an annular oil duct 103 of the rotary valve core 1 to form A, T intercommunication;
it can be seen from the figure that when the rotary valve core 1 rotates one cycle, P/a communication is generated n times (B/T communication n times) (n is the number of the axial oil grooves 102), P/a cut off is generated n times (B/T cut off n times), P/B communication is generated n times (a/T communication n times) (n is the number of the axial oil grooves 104), that is, a/B port is generated to output pressure oil n times; when the rotating speed of the rotary valve core 1 is changed, the on-off times of P/A/B/T can be changed, high-frequency opening and closing are realized, and the frequency is adjustable.
It can be seen from the figure that when the rotary valve core 1 rotates one cycle, P/a communication is generated n times (B/T communication n times) (n is the number of the first axial oil grooves 102), P/a cut off is generated n times (B/T cut off n times), P/B communication is generated n times (a/T communication n times) (n is the number of the second axial oil grooves 104), that is, a/B port is generated and pressure oil is output n times; when the rotating speed of the rotary valve core 1 is changed, the on-off times of P/A/B/T can be changed, high-frequency opening and closing are realized, and the frequency is adjustable.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (7)
1. A valve core is characterized in that a first annular oil groove, a second annular oil groove and a third annular oil groove are arranged on the outer surface of the valve core at intervals; a first axial groove and a second axial groove are arranged on the surface of the valve core along the axial direction in a circumferential array; the first axial groove is connected with the first annular groove; the second axial groove is connected with the second annular groove; a first radial hole, a second radial hole, a third radial hole and a fourth radial hole are formed in the radial direction of the valve core; the first radial hole is connected with the first annular groove; the third radial hole is communicated with the third annular groove, the first radial hole is connected with the third radial hole through the axial hole, and the central hole of the valve body is connected with the second annular groove through the second radial hole and communicated with the outer surface of the valve core through the fourth radial hole.
2. A valve trim according to claim 1 wherein the first axial grooves and the second axial grooves are staggered circumferentially of the trim.
3. A valve cartridge according to claim 1, wherein one end of the axial bore is provided with a technical plug.
4. A hydraulic valve comprising a valve body and the valve cartridge of claims 1-3 above; the valve core is rotatably arranged in the valve body; an oil inlet, a first oil outlet, a second oil outlet and a third oil outlet are formed in the outer surface of the valve body; the oil inlet is connected with the first annular groove; the circle centers of the first oil outlet and the second oil outlet are positioned on the same cross section vertical to the axis of the valve core, and the cross section is provided with a first axial oil groove and a second axial oil groove; the third oil outlet is connected with the second annular groove.
5. The hydraulic valve according to claim 4, wherein both ends of the spool in the axial direction are fixed in the valve body by a first bearing and a second bearing, respectively.
6. The hydraulic valve of claim 5, wherein one end of the valve body in the length direction is fixed to the first bearing by providing a first end cap; the other end of the bearing is fixed on a second bearing through a second end cover; a check ring is arranged between the second end cover and the second bearing; the second end cover and the valve core are in rotary seal.
7. The hydraulic valve of claim 4, wherein the second end cap is coupled to a drive motor, a rotating shaft of the drive motor passing through the second end cap is coupled to the spool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010496918.5A CN111550578A (en) | 2020-06-03 | 2020-06-03 | Valve core and hydraulic valve comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010496918.5A CN111550578A (en) | 2020-06-03 | 2020-06-03 | Valve core and hydraulic valve comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111550578A true CN111550578A (en) | 2020-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010496918.5A Pending CN111550578A (en) | 2020-06-03 | 2020-06-03 | Valve core and hydraulic valve comprising same |
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| Country | Link |
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| CN (1) | CN111550578A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153850A (en) * | 2021-03-23 | 2021-07-23 | 同济大学 | Shaft flow distribution high-frequency switch reversing valve |
| CN116447190A (en) * | 2023-06-14 | 2023-07-18 | 江苏曹工液压科技有限公司 | Hydraulic valve capable of flexibly reversing |
-
2020
- 2020-06-03 CN CN202010496918.5A patent/CN111550578A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153850A (en) * | 2021-03-23 | 2021-07-23 | 同济大学 | Shaft flow distribution high-frequency switch reversing valve |
| CN116447190A (en) * | 2023-06-14 | 2023-07-18 | 江苏曹工液压科技有限公司 | Hydraulic valve capable of flexibly reversing |
| CN116447190B (en) * | 2023-06-14 | 2023-09-08 | 江苏曹工液压科技有限公司 | Hydraulic valve capable of flexibly reversing |
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