CN220286089U - Compensating valve with coaxial integration of one-way valve - Google Patents
Compensating valve with coaxial integration of one-way valve Download PDFInfo
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- CN220286089U CN220286089U CN202321708449.4U CN202321708449U CN220286089U CN 220286089 U CN220286089 U CN 220286089U CN 202321708449 U CN202321708449 U CN 202321708449U CN 220286089 U CN220286089 U CN 220286089U
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- core
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- 230000010354 integration Effects 0.000 title claims description 4
- 238000007789 sealing Methods 0.000 claims description 9
- 238000009434 installation Methods 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Multiple-Way Valves (AREA)
Abstract
The utility model discloses a compensation valve coaxially integrated with a one-way valve, which comprises a valve sleeve, wherein a valve core hole is formed in the bottom of the valve sleeve, a first oil hole used for communicating an LS cavity is formed in the upper part of the valve core hole, a compensation valve core positioned below the first oil hole is arranged in the valve core hole, a tubular cone valve core is arranged below the valve sleeve, the cone valve core is sleeved on the outer side of the compensation valve core, and a spring is arranged between the cone valve core and the valve sleeve; a blind hole for communicating the CN port is formed in the bottom surface of the compensation valve core, a second oil hole is formed in the upper end of the blind hole, a third oil hole connected with the blind hole is formed in the side wall of the compensation valve core, and the third oil hole is located below the second oil hole. The utility model has the advantages of low installation position requirement, reduced valve body volume of the multi-way valve and further reduced cost of the multi-way valve on the basis of integrating the compensation valve function and the load check valve, keeping the compensation valve function and the load check valve function independent of each other and having high response speed.
Description
Technical Field
The utility model belongs to the field of load-sensitive multi-way valves, and particularly relates to a compensation valve coaxially integrated with a one-way valve in a load-sensitive multi-way valve.
Background
The load-sensitive multi-way valve is one of the multi-way valves, is widely used on a hydraulic system of engineering machinery, has a simple structure, fewer parts and convenient layout, and is the most commonly used multi-way valve on a medium-small micro excavator.
The compensation valve is a key part of the load-sensitive multi-way valve and is used for realizing the pressure compensation function; the load check valve is often matched with the compensation valve to prevent the load pressure from flowing backwards to the P port.
The load check valve and the compensation valve are matched for use, so that the overall layout of the load sensitive multi-way valve is often influenced by the layout of the load check valve and the compensation valve, and the volume and the weight of the valve body of the load sensitive multi-way valve are greatly influenced.
The existing compensation valve and load check valve are arranged in the load sensitive multi-way valve, such as the Lishile SX12 type LUDV type multi-way valve, the Lishile SX14 type multi-way valve and the Lishile SX14 type S type multi-way valve, as shown in fig. 8 and 9, one compensation valve and two load check valves are respectively and independently arranged at different positions of the valve body. The basic working principle is that after the main valve core of the multi-way valve is changed, the oil in the P port enters the CN port through the main valve core 7, the oil in the CN port acts on the compensation valve to push the compensation valve core to open the compensation valve, the oil in the P port flows out from the upper part of the compensation valve and enters the LS flow passage, and the compensation valve can play a compensation function. With the continuous increase of the oil liquid at the P port, when the pressure at the CN port is greater than the load pressure, the load one-way valve is opened, the oil liquid at the P port sequentially enters the compensation valve through the main valve core 7 and the CN port, flows out of the middle part of the compensation valve and sequentially enters the A/B port through the load one-way valve, the intermediate bridge 60 and the main valve core 7.
The existing compensation valve and the load check valve are independent in function, have no linkage action and high response speed, occupy more installation positions, and have larger structure required by the valve body of the load sensitive multi-way valve, so that the load sensitive multi-way valve is not beneficial to being used on small and medium-sized micro-digging machines.
Disclosure of Invention
The utility model aims to provide a compensation valve with a coaxially integrated one-way valve. The utility model has the advantages of low installation position requirement, reduced valve body volume of the multi-way valve and reduced cost of the multi-way valve on the basis of integrating the compensation valve function and the load check valve, keeping the compensation valve function and the load check valve function independent of each other and having high response speed.
The technical scheme of the utility model is as follows: the compensating valve coaxially integrated by the one-way valve comprises a valve sleeve, wherein a valve core hole is formed in the bottom of the valve sleeve, a first oil hole used for communicating an LS cavity is formed in the upper portion of the valve core hole, a compensating valve core positioned below the first oil hole is arranged in the valve core hole, a tubular conical valve core is arranged below the valve sleeve, the conical valve core is sleeved on the outer side of the compensating valve core, a spiral spring is arranged between the conical valve core and the valve sleeve, and the lower end of the spring is sleeved on the outer side of the conical valve core;
a blind hole for communicating the CN port is formed in the bottom surface of the compensation valve core, a second oil hole is formed in the upper end of the blind hole, a third oil hole connected with the blind hole is formed in the side wall of the compensation valve core, and the third oil hole is located below the second oil hole.
In the compensation valve coaxially integrated with the one-way valve, the upper end of the valve sleeve is provided with the elastic retainer ring for the hole.
In the compensation valve coaxially integrated with the one-way valve, the upper end of the valve core hole extends radially outwards to form the annular groove, the first oil hole is positioned on the side wall of the annular groove, the upper end face of the compensation valve core is provided with the protruding part, and the top surface of the protruding part is provided with the cross-shaped oil groove.
In the compensation valve coaxially integrated with the one-way valve, a plurality of the third oil holes are distributed circumferentially around the axis of the compensation valve core.
In the compensation valve coaxially integrated with the one-way valve, a sealing ring is arranged on the outer side of the valve sleeve.
In the compensation valve coaxially integrated with the one-way valve, the top of at least one third oil hole is provided with a throttling groove.
In the compensation valve coaxially integrated with the one-way valve, the lower end of the cone valve core is provided with a spherical surface.
In the compensation valve coaxially integrated with the one-way valve, the lower end face of the valve sleeve is provided with an annular groove.
Compared with the prior art, the utility model integrates the load check valve and the compensation valve and is coaxially arranged, the valve core (cone valve core) of the load check valve and the valve core (compensation valve core) of the compensation valve are independent, so that the realization of the check valve function and the realization of the compensation valve function are independent, the advantage of high response speed of independent arrangement of the existing load check valve and the compensation valve is reserved, the requirement of the installation position is greatly reduced, and the volume of the multi-way valve can be reduced when the multi-way valve is arranged on the multi-way valve, thereby being suitable for being used on small and medium-sized micro-digging machines.
Further, the lower end of the cone valve core is provided with a spherical surface, so that the cone valve core and the valve body of the multi-way valve can form spherical hinge, when the cone valve core is slightly deflected, the cone valve core can still be tightly attached to the valve body, good tightness is maintained, the backflow of oil liquid at the A/B port to the P port is effectively prevented, and the unidirectional function is good.
Furthermore, through setting up annular slot at the valve pocket lower extreme, make valve pocket lower extreme inside and outside wall thickness thinner, under the oil pressure effect of intermediate bridge way, the valve pocket lower extreme opens, and inside and outside laminating compensation case and valve body respectively has effectively reduced the fit clearance, has formed good sealed effect. The grooves are equivalent to two sealing rings respectively arranged on the inner side and the outer side of the valve sleeve, so that the number of the sealing rings can be reduced, the cost is reduced, the friction force between the valve sleeve and the compensation valve core is small, the moving speed of the compensation valve core is improved, and the response speed of the compensation valve is high.
Furthermore, the compensation valve is fixed in the valve body jack of the multi-way valve by adopting the circlip for holes. The common mode is to fix by using a plug as shown in fig. 8, and the O-shaped ring is arranged on the plug, so that the diameter of the jack is increased, the length of the jack is increased, and the height and the thickness of the valve body are increased, so that the valve is not suitable for being used on small and medium-sized micro-digging machines. When the compensation valve is fixed by adopting the elastic check ring for the hole, the installation volume of the elastic check ring for the hole is small, the weight is light, the cost is low, the requirements on the height and the thickness of the valve body can be effectively reduced, and the multi-way valve is suitable for being used on small and medium-sized micro-digging machines and has more advantages.
The existing small and medium-sized micro-excavator, especially the small excavator with the thickness of less than 6 tons and the micro-excavator, has the advantages that the valve body thickness of the used compensation valve is very thin, the valve body thickness limits the diameter of a jack for installing the compensation valve, if the existing two load check valves are simply integrated with the compensation valve, the diameter of the jack can be increased undoubtedly, and the jack with the larger diameter cannot be arranged on the valve body, which is why the compensation valve and the load check valve of the existing small and medium-sized micro-excavator are respectively and independently arranged, but the two load check valves are more in number and are increased in cost when being respectively and independently arranged, the number of the jacks required by matching is increased, the layout of the valve body is not facilitated, the volume and the weight of the valve body can be increased, and the valve body is not particularly suitable for being used on the multi-way valve of the small and medium-sized micro-excavator. The cone valve core and the compensation valve core are coaxially arranged, the function of two load check valves is realized by one cone valve core, namely, the number of the load check valves is reduced from two to one, the cost is reduced, the jack of the load check valve is shared with the jack of the compensation valve, the valve body layout is facilitated, the volume and the weight of the valve body can be reduced, the valve body is suitable for being used on a multi-way valve of a medium-small micro excavator, and through calculation, the height of the valve body can be reduced by more than 25%, the weight of the valve body is reduced by more than 12%, and the overall cost is obviously reduced.
In summary, the utility model has the advantages of low installation position requirement, reduced valve body volume of the multi-way valve and further reduced cost of the multi-way valve on the basis of integrating the compensation valve function and the load check valve, keeping the compensation valve function and the load check valve function independent of each other and having high response speed.
Drawings
Fig. 1 is a schematic diagram of the present utility model in a load-sensitive multiway valve.
Fig. 2 is a front view of the compensator spool.
Fig. 3 is a perspective view of the compensator spool.
Fig. 4 is a front view of the cone spool.
Fig. 5 is a front view of the valve sleeve.
Fig. 6 is a perspective view of the valve sleeve.
Fig. 7 is a hydraulic schematic of an LSV pilot-operated load-sensitive multiway valve.
Fig. 8 is a front view of a prior art multiple way valve.
Fig. 9 is a left side view of a prior art multiple way valve.
The marks in the drawings are: 1-valve sleeve, 2-compensation valve core, 3-cone valve core, 4-spring, 5-sealing ring, 6-valve body, 7-main valve core, 10-valve core hole, 11-first oil hole, 12-annular groove, 13-groove, 20-blind hole, 21-second oil hole, 22-throttling groove, 23-third oil hole, 24-circlip for hole, 25-protruding part, 26-oil groove, 30-sphere and 60-intermediate bridge.
Detailed Description
The utility model is further illustrated by the following figures and examples, which are not intended to be limiting.
Examples. The compensating valve with the coaxial integration of the check valve comprises a valve sleeve 1, wherein a valve core hole 10 is formed in the bottom of the valve sleeve 1, a first oil hole 11 used for communicating an LS cavity is formed in the upper portion of the valve core hole 10, a compensating valve core 2 located below the first oil hole 11 is arranged in the valve core hole 10, a tubular cone valve core 3 (actually a valve core of a load check valve) is arranged below the valve sleeve 1, the cone valve core 3 is sleeved on the outer side of the compensating valve core 2, a spiral spring 4 is arranged between the cone valve core 3 and the valve sleeve 1, and the lower end of the spring 4 is sleeved on the outer side of the cone valve core 3.
The bottom surface of the compensation valve core 2 is provided with a blind hole 20 for communicating with the CN port, the blind hole 20 is a stepped blind hole, the upper end of the blind hole 20 is provided with a second oil hole 21, the side wall of the compensation valve core 2 is provided with a third oil hole 23 connected with the blind hole 20, and the third oil hole 23 is positioned below the second oil hole 21.
The upper end of the valve sleeve 1 is provided with a circlip 24 for hole.
The upper end of the valve core hole 10 extends radially outwards to form an annular groove 12, the first oil hole 11 is positioned on the side wall of the annular groove 12, the upper end face of the compensation valve core 2 is provided with a protruding part 25, and the top surface of the protruding part 25 is provided with a cross-shaped oil groove 26.
The plurality of the third oil holes 23 are circumferentially distributed around the axis of the compensation valve core 2, the top of at least one third oil hole 23 is provided with a throttling groove 22, and the height of the throttling groove 22 corresponds to the bottom surface of the cone valve core 3.
And a sealing ring 5 is arranged on the outer side of the valve sleeve 1.
The lower end of the cone valve core 3 extends radially outwards, and a spherical surface 30 is arranged at the lower end of the extending part.
The lower end surface of the valve sleeve 1 is provided with an annular groove 13.
When the compensation valve is arranged on the load-sensitive multi-way valve, a jack is formed in the valve body 6 of the load-sensitive multi-way valve, the valve sleeve 1 is fixed in the jack through the elastic retainer 24 for the hole, the first oil hole 11 is communicated with an LS cavity (the LS cavity is a part of an LS runner) in the valve body 6, the blind hole 20 is communicated with a CN port of the valve body 6, the cone valve core 3 is positioned at the oil inlet end of the middle bridge 60, the spherical surface 30 at the lower end of the cone valve core 3 is abutted to the conical surface in the valve body 6, and sealing fit of the spherical surface 30 to the conical surface (the conical surface is formed in the valve body 6) is formed between the cone valve core and the valve body 6, so that the middle bridge is blocked, and the one-way valve function is realized. The valve sleeve 1 is in clearance fit with the valve body 6 for sealing, and the sealing ring 5 further ensures that oil cannot leak outwards, and the valve sleeve 1 is in clearance fit with the compensation valve core 2.
Working principle: when the main valve core 7 of the multi-way valve is changed, the oil in the P port enters the CN port through the main valve core 7, and the oil entering the CN port is divided into two parts. Firstly, CN oil acts on the compensating valve core 2 to push the compensating valve core 2 to move upwards until the compensating valve core 2 is limited by the valve sleeve 1 to stop moving, at this time, the second oil hole 21 is communicated with the annular groove 12, and a small part of the CN oil enters the LS flow passage through the blind hole 20, the second oil hole 21, the annular groove 12 and the first oil hole 11 to play a role of a compensating valve.
Secondly, the compensation valve core 2 moves upwards, the third oil hole 23 at the lower end of the compensation valve core 2 is opened, oil acts below the cone valve core 3, when the oil pressure of the CN oil passage is larger than the load pressure, the oil of the CN oil passage overcomes the elasticity of the spring 4 and pushes the cone valve core 3 to move upwards, the oil of the CN port enters the intermediate bridge, and then enters the A/B port through the main valve core 7.
When a plurality of compensation valves perform combined action, the multi-way main valve core commutates, wherein the compensation valve core with the largest load pressure is completely opened, pressure oil enters the LS runner, the LS runner pressure acts on other compensation valve cores, the other compensation valve cores have relatively lower load pressure, the lower end pressure of the compensation valve core is lower, the compensation valve core moves downwards, and the compensation valve core generates throttling, so that the pressure of the CN port oil duct is suppressed to be high until the pressure of the CN port oil duct is consistent with the pressure of the LS cavity oil duct to reach balance. The pressure behind all the valve cores of the working combination (namely the CN port oil duct) is equal to the pressure of the LS cavity oil duct, namely the front-back pressure difference of all the combined main valve cores is the same, the flow passing through the valve cores is in direct proportion to the opening area of the main valve cores, and the flow is irrelevant to the load.
Claims (8)
1. The compensating valve of the coaxial integration of check valve, its characterized in that: the valve comprises a valve sleeve (1), wherein a valve core hole (10) is formed in the bottom of the valve sleeve (1), a first oil hole (11) used for communicating an LS cavity is formed in the upper portion of the valve core hole (10), a compensation valve core (2) located below the first oil hole (11) is arranged in the valve core hole (10), a tubular cone valve core (3) is arranged below the valve sleeve (1), the cone valve core (3) is sleeved on the outer side of the compensation valve core (2), a spiral spring (4) is arranged between the cone valve core (3) and the valve sleeve (1), and the lower end of the spring (4) is sleeved on the outer side of the cone valve core (3);
a blind hole (20) for communicating a CN port is formed in the bottom surface of the compensation valve core (2), a second oil hole (21) is formed in the upper end of the blind hole (20), a third oil hole (23) connected with the blind hole (20) is formed in the side wall of the compensation valve core (2), and the third oil hole (23) is located below the second oil hole (21).
2. The one-way valve coaxially integrated compensating valve of claim 1, wherein: the upper end of the valve sleeve (1) is provided with an elastic retainer ring (24) for holes.
3. The one-way valve coaxially integrated compensating valve of claim 1, wherein: the upper end of the valve core hole (10) extends radially outwards to form an annular groove (12), the first oil hole (11) is positioned on the side wall of the annular groove (12), the upper end face of the compensation valve core (2) is provided with a protruding part (25), and the top surface of the protruding part (25) is provided with a cross-shaped oil groove (26).
4. The one-way valve coaxially integrated compensating valve of claim 1, wherein: the plurality of the third oil holes (23) are circumferentially distributed around the axis of the compensation valve core (2).
5. The one-way valve coaxially integrated compensating valve of claim 1, wherein: and a sealing ring (5) is arranged on the outer side of the valve sleeve (1).
6. The one-way valve co-axially integrated compensation valve of claim 4, wherein: the top of at least one third oil hole (23) is provided with a throttling groove (22).
7. The one-way valve coaxially integrated compensating valve of claim 1, wherein: the lower end of the cone valve core (3) is provided with a spherical surface (30).
8. The one-way valve coaxially integrated compensating valve of claim 1, wherein: the lower end face of the valve sleeve (1) is provided with an annular groove (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321708449.4U CN220286089U (en) | 2023-07-03 | 2023-07-03 | Compensating valve with coaxial integration of one-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321708449.4U CN220286089U (en) | 2023-07-03 | 2023-07-03 | Compensating valve with coaxial integration of one-way valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220286089U true CN220286089U (en) | 2024-01-02 |
Family
ID=89336038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321708449.4U Active CN220286089U (en) | 2023-07-03 | 2023-07-03 | Compensating valve with coaxial integration of one-way valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220286089U (en) |
-
2023
- 2023-07-03 CN CN202321708449.4U patent/CN220286089U/en active Active
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