CN217301083U - Sealing structure of threaded cartridge valve - Google Patents
Sealing structure of threaded cartridge valve Download PDFInfo
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- CN217301083U CN217301083U CN202220836296.0U CN202220836296U CN217301083U CN 217301083 U CN217301083 U CN 217301083U CN 202220836296 U CN202220836296 U CN 202220836296U CN 217301083 U CN217301083 U CN 217301083U
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- cartridge valve
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- threaded cartridge
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Abstract
The utility model relates to a sealing washer structure specifically is a screw-in cartridge valve seal structure, and this screw-in cartridge valve seal structure is made by polyurethane material, and the sealing washer body, the planar projection of this sealing washer body are ring shape, and its middle part is the suit hole. The sealing ring body is divided into a left part, a middle part and a right part, wherein the left part and the right part are a left supporting ring and a right supporting ring which have the same structure, and the middle part is a main sealing lip; the diameters of the left side support ring and the right side support ring are smaller than the diameter of the main sealing lip, and the outer circumferential surface of the main sealing lip is in smooth transition connection with the outer circumferential surfaces of the left side support ring and the right side support ring. The sealing structure has a unique symmetrical structure with high middle height and low two ends, the supporting rings on the two sides can improve the resistance of the sealing structure to high-pressure oil impact of high-frequency reversing and reduce the dependence of a sealing system of the threaded cartridge valve on the check ring, and therefore the phenomenon that the threaded cartridge valve is damaged due to extrusion caused by the fact that the check ring is arranged on the contrary when the threaded cartridge valve works is avoided.
Description
Technical Field
The utility model relates to a sealing washer structure specifically is a screw thread cartridge valve seal structure.
Background
The hydraulic thread cartridge valve has the characteristics of small volume, light weight, zero leakage, low cost and the like, is widely applied to engineering machinery and other mobile machinery fields, opens a channel which can be designed and changed according to the requirements of a hydraulic system, enables a hydraulic control system loop to be integrated, miniaturized and light, and gradually replaces the traditional plate type valve and a superposition valve which have large volume and many leakage points.
The main form of a sealing system of the threaded cartridge valve in the market at present is O-shaped ring + single-side PTFE check ring (single-side high-pressure oil) or O-shaped ring + double-side PTFE check ring (double-side high-low pressure conversion), and the sealing structure has the biggest advantage of low cost, can be suitable for most of medium-low pressure hydraulic system working conditions, and has the defects of short sealing life, incapability of bearing high pressure and easy wrong installation of the check ring under the single-side high-pressure working condition.
Disclosure of Invention
An object of the utility model is to provide a screw-thread cartridge valve seal structure, this seal structure have the symmetrical structure that unique centre is high, both ends are low, the support ring of both sides both can improve its resistance to the high-pressure oil impact of high frequency switching-over, extension seal structure's life can reduce the reliance of screw-thread cartridge valve sealing system to the retaining ring again to avoid appearing screw-thread cartridge valve because the damaged phenomenon of extrusion that the retaining ring dress leads to on the contrary at the during operation.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a screw-thread cartridge valve seal structure, includes the sealing washer body, and the plane projection of this sealing washer body is ring shape, and its middle part is the suit hole, and the smooth and laminating of the inner wall in suit hole sealed ditch groove bottom of screw-thread cartridge valve. The sealing ring body in the scheme is divided into a left part, a middle part and a right part, wherein the left part and the right part are a left side supporting ring and a right side supporting ring which have the same structure, the middle part is a main sealing lip, the diameters of the left side supporting ring and the right side supporting ring are smaller than the diameter of the main sealing lip, in addition, the outer circumferential surface of the main sealing lip is in smooth transition connection with the outer circumferential surfaces of the left side supporting ring and the right side supporting ring, and the cross section profile of the sealing ring body is approximately in a D shape.
In above-mentioned technical scheme, form through the circumference profile that changes the sealing washer body for the support ring that has supporting role at the both ends of sealing washer body, the middle part is for having the main seal lip of sealing effect, and the area of contact of seal structure and valve opening has been reduced in this kind of design in fact, promptly, only makes the periphery contact valve opening inner wall of main seal lip, and this can reduce the frictional force between seal structure and the valve opening, ensures that the sealing performance of main seal lip can not descend because of wearing and tearing. Based on the technical scheme, firstly, the D-shaped shape with high middle and low two ends reduces the possibility that key parts at two ends of the sealing structure are cut by the valve hole in the installation process of the threaded cartridge valve; secondly, whether high-pressure oil is introduced to the left side or the right side, the high-strength left support ring and the high-strength right support ring can provide effective support, and the main sealing lip is prevented from being extruded or losing efficacy due to the impact of high-frequency reversing high-pressure oil; in addition, the design of support ring can reduce the reliance of screw thread cartridge valve sealing system to the retaining ring to avoid appearing the screw thread cartridge valve and adorning because the retaining ring leads to the phenomenon damaged of extrusion on the contrary at the during operation.
Preferably, the threaded cartridge valve sealing structure is made of a polyurethane material.
Preferably, the width of the primary sealing lip is 3/5-4/5 of the width of the seal ring body.
Preferably, the sealing structure of the threaded cartridge valve further comprises a plurality of oil passing bulges arranged on the side faces of the left support ring and the right support ring, the oil passing bulges on the side faces of the left support ring and the right support ring are symmetrically arranged and are attached to the side faces of the sealing groove of the threaded cartridge valve. The oil passing protrusion arranged on two sides of the sealing ring body can ensure that high-pressure hydraulic oil can enter one side of the sealing structure quickly, the sealing structure is pushed to deform to generate a sealing effect, and meanwhile, oil on the other side of the sealing structure flows out quickly to avoid generating local trapped pressure and back pressure.
Preferably, the number of the oil through bulges on one side of the sealing ring body is at least four, and the oil through bulges are uniformly distributed around the sleeving hole.
Preferably, the thickness of the oil through bulge in the axial direction of the sealing ring body is 0.2-1 mm.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is the utility model discloses thread cartridge valve seal structure's that embodiment provided dissects the schematic structure diagram.
In the figure, a seal ring body 1, a sleeving hole 2, a right support ring 3, a left support ring 4, a main seal lip 5 and an oil through bulge 6.
Detailed Description
Embodiments of the present application will be described in detail with reference to the drawings and examples, so that how to implement technical means to solve technical problems and achieve technical effects of the present application can be fully understood and implemented.
Fig. 1 is an embodiment of the present invention, a sealing structure of a threaded cartridge valve. The sealing structure of the threaded cartridge valve is made of high-performance polyurethane materials with increased wear resistance and strength, as shown in the figure, the plane projection of a sealing ring body 1 of the sealing structure is in a circular ring shape, the middle part of the sealing ring body is provided with a sleeving hole 2, and the inner wall of the sleeving hole 2 is smooth and is attached to the bottom of a sealing groove of the threaded cartridge valve. The sealing ring body 1 is divided into a left part, a middle part and a right part, wherein the left part and the right part are a left side support ring 4 and a right side support ring 3 which have the same structure, and the middle part is a main sealing lip 5. Firstly, the diameters of the left support ring 4 and the right support ring 3 are smaller than the diameter of the main sealing lip 5, the width of the main sealing lip 5 accounts for 3/5 of the width of the sealing ring body 1, in addition, the outer circumferential surface of the main sealing lip 5 is in smooth transition connection with the outer circumferential surfaces of the left support ring 4 and the right support ring 3, so that the outer circumference middle part of the sealing ring body 1 is bulged outwards, the whole cross section outline is approximately in a D shape, the whole sealing structure realizes sealing by the contact of the main sealing lip 5 and the inner wall of the valve hole, the friction force between the sealing structure and the valve hole can be reduced, the sealing performance of the main sealing lip is ensured not to be reduced due to abrasion, and in the mounting process, the D shape with the middle high height and the two low ends reduces the possibility that key parts at the two ends of the sealing structure are cut by the valve hole in the mounting process of the screw insert valve.
In addition, as shown in the figure, this screw-in cartridge valve seal structure is still including setting up a plurality of columns in left side support ring 4 and right side support ring 3 side and leading to protruding 6 of oil, and the quantity that unilateral leads to protruding 6 of oil is 4, and in the axis direction of sealing washer body 1, the thickness that leads to protruding 6 of oil is 0.5mm, and in addition, the protruding 6 symmetry settings of leading to of left side support ring 4 and right side support ring 3 side to the sealed slot side of laminating screw-in cartridge valve. These oil through bulges 6 can ensure that high-pressure hydraulic oil can quickly enter one side of the sealing structure, promote the deformation of the sealing structure to generate a sealing effect, and simultaneously allow the oil on the other side of the sealing structure to quickly flow out, thereby avoiding the generation of local trapped pressure and back pressure.
The seal structure that this embodiment provided wholly adopts the high performance polyurethane material that has increased wearability and intensity, and unique centre is high, the low symmetrical structure in both ends, has reduced the reliance of screw-thread cartridge valve sealing system to the retaining ring, can not appear the valve body in the during operation because the retaining ring dress leads to on the contrary by the damaged problem of being extruded. And no matter the high-pressure oil is led to on the left side or the high-pressure oil is led to on the right side, the oil-leading bulge 6 that sets up can ensure at first that high-pressure hydraulic oil gets into one side of seal structure fast, promote the deformation of seal structure and produce sealed effect, let the oil of seal structure other side flow out fast simultaneously, avoid producing local trapped pressure and backpressure, in addition, the left side support ring and the right side support ring of high strength all can provide effectual support, ensure that the main seal lip can not be extruded or become invalid because of the impact of the high-pressure oil of high frequency switching-over.
Through the test, the sealing structure of the threaded cartridge valve is simple and easy to install, has higher installation efficiency than the traditional O-ring and PTFE check ring structure, can pass more than 100 ten thousand times of pulse intensity tests under the test pressure of 40MPa, has the service life of integral sealing more than 3 times of the service life of the traditional sealing, and reduces the maintenance cost of terminal customers.
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. The description and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
While the foregoing description shows and describes several preferred embodiments of the invention, it is to be understood, as noted above, that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.
Claims (6)
1. The utility model provides a screw-thread cartridge valve seal structure, includes the sealing washer body, and the plane projection of this sealing washer body is ring shape, and its middle part is the suit hole, and the smooth sealing groove bottom surface of laminating screw-thread cartridge valve of inner wall in suit hole, its characterized in that: the sealing ring body is divided into a left part, a middle part and a right part, wherein the left part and the right part are a left supporting ring and a right supporting ring which have the same structure, and the middle part is a main sealing lip; the diameters of the left side supporting ring and the right side supporting ring are smaller than the diameter of the main sealing lip, and the outer circumferential surface of the main sealing lip is in smooth transition connection with the outer circumferential surfaces of the left side supporting ring and the right side supporting ring.
2. The sealing structure of a threaded cartridge valve according to claim 1, wherein: the sealing structure of the threaded cartridge valve is made of polyurethane material.
3. The sealing structure of a threaded cartridge valve according to claim 2, wherein: the width of the main sealing lip accounts for 3/5-4/5 of the width of the sealing ring body.
4. The sealing structure of the threaded cartridge valve according to claim 2 or 3, wherein the sealing structure of the threaded cartridge valve further comprises a plurality of oil passing protrusions arranged on the side surfaces of the left support ring and the right support ring, and the oil passing protrusions on the side surfaces of the left support ring and the right support ring are symmetrically arranged and fit with the side surfaces of the sealing groove of the threaded cartridge valve.
5. The sealing structure of a threaded cartridge valve according to claim 4, wherein: the oil through bulges on one side of the sealing ring body are at least four, and the oil through bulges are uniformly distributed around the sleeving hole.
6. The sealing structure of the threaded cartridge valve according to claim 5, wherein: in the axial direction of the sealing ring body, the thickness of the oil-through bulge is 0.2-1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220836296.0U CN217301083U (en) | 2022-04-12 | 2022-04-12 | Sealing structure of threaded cartridge valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220836296.0U CN217301083U (en) | 2022-04-12 | 2022-04-12 | Sealing structure of threaded cartridge valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217301083U true CN217301083U (en) | 2022-08-26 |
Family
ID=82937511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220836296.0U Active CN217301083U (en) | 2022-04-12 | 2022-04-12 | Sealing structure of threaded cartridge valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217301083U (en) |
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2022
- 2022-04-12 CN CN202220836296.0U patent/CN217301083U/en active Active
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