CN218953686U - Area difference direct-acting overflow valve - Google Patents
Area difference direct-acting overflow valve Download PDFInfo
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- CN218953686U CN218953686U CN202223034913.4U CN202223034913U CN218953686U CN 218953686 U CN218953686 U CN 218953686U CN 202223034913 U CN202223034913 U CN 202223034913U CN 218953686 U CN218953686 U CN 218953686U
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Abstract
The utility model belongs to the technical field of hydraulic overflow valves, and particularly relates to an area difference direct-acting overflow valve, which comprises a shell, wherein an adjusting plug cap assembly is arranged at one end in the shell, a valve seat assembly is arranged at the other end in the shell, a pressure limiting switch and an area difference valve core assembly are also arranged in the shell, one end of the area difference valve core assembly is contacted with the valve seat assembly, the other end of the area difference valve core assembly is contacted with the pressure limiting switch, the other end of the pressure limiting switch is contacted with the adjusting plug cap assembly, a pressure guiding hole is arranged in the area difference valve core assembly and communicated with an inner cavity of the shell and an inlet of the valve seat assembly, the inlet of the valve seat assembly is communicated with a system pipeline, the area of the end face of one side, contacted with the valve core assembly, of the valve seat assembly is S1, and the area of the end face of the other side, contacted with the pressure limiting switch, is S1 is larger than S2.
Description
Technical Field
The utility model belongs to the technical field of hydraulic overflow valves, and particularly relates to an area difference direct-acting overflow valve.
Background
The high-pressure high-flow overflow valve of the hydraulic system of the current aircraft adopts a pilot type or a common direct-acting type, the pilot type is complex in structure and low in reliability, not only occupies limited space, but also increases weight, and simultaneously affects the layout of other accessories.
Disclosure of Invention
Object of the Invention
The direct-acting overflow valve with the area difference solves the problems of high spring force, difficult design, large volume and weight, low durability and the like of a common direct-acting overflow valve in the prior art.
Technical proposal
The utility model provides an area difference direct-acting overflow valve, includes the casing, the casing in one end set up and adjust stifled cap subassembly, the other end sets up the disk seat subassembly in the casing, the casing in still be provided with pressure limit switch, area difference case subassembly one end and disk seat subassembly contact, the other end contacts with pressure limit switch, the pressure limit switch other end contacts with adjusting stifled cap subassembly, area difference case subassembly inside be provided with the pressure guiding hole, pressure guiding hole intercommunication casing inner chamber and disk seat subassembly import, disk seat subassembly import and system pipeline intercommunication, case subassembly and one side terminal surface area of disk seat subassembly contact be S1, one side terminal surface area of contact with pressure limit switch is S2, wherein S1 is greater than S2.
Further, the area difference valve core assembly comprises a valve core, a protection ring and a sealing ring, wherein the valve core is in sliding fit with the inner cavity of the shell, and the protection ring and the sealing ring are arranged on the matching surface of the valve core and the inner cavity of the shell.
Further, the adjusting plug cap component is fixed at one end in the shell through a lock nut.
Further, the pressure limiting switch comprises a spring and two spring seat components, the two spring seat components are respectively in one-to-one corresponding contact with the regulating plug cap component and the valve core, and the spring is arranged between the two spring seat components.
Further, the spring seat assembly comprises a spring seat and a steel ball arranged on the end face of the spring seat.
Further, the pressure guiding hole is arranged inside the valve core, the pressure guiding hole comprises a main pressure guiding hole and three lateral pressure guiding holes, the lateral pressure guiding holes are communicated with the main pressure guiding hole and the inner cavity of the shell, and the main pressure guiding hole is communicated with the inlet of the valve seat assembly and the system pipeline.
Further, a sealing ring and a protection ring are arranged between the adjusting plug cap assembly and the inner wall of the shell, and a sealing ring is arranged between the spring seat assembly and the inner wall of the shell.
Further, a sealing ring is arranged on the outer cylindrical surface of the shell, and a sealing ring and a protection ring are arranged on the outer cylindrical surface of the valve seat assembly.
Further, the right end face of the valve core is contacted with the left end face of the valve seat assembly to form a seal, so that the inlet and the outlet of the area difference direct-acting overflow valve are isolated.
Advantageous effects
According to the area difference direct-acting overflow valve provided by the utility model, through the pressure guiding hole in the valve core assembly, the hydraulic pressure at the inlet of the valve seat assembly is led to the left end from the right end of the valve core assembly, the effect that the hydraulic pressures P at the two ends of the valve core assembly are equal is realized, the right end stressed area of the valve core assembly is S1, the left end stressed area is S2, because S1 is more than S2, the hydraulic pressure born by the right end of the valve core assembly is Px (S1-S2), the hydraulic pressure born by the right end of the valve core assembly is reduced from the traditional Px S1 to Px (S1-S2) due to the existence of the pressure guiding hole and the area difference, when the valve core assembly is static, the hydraulic pressure born by the right end of the valve core assembly is equal to the spring force, the spring force is greatly reduced, the design difficulty of the spring is greatly reduced, the stress under working conditions is greatly reduced, and the service life of the spring is prolonged.
Drawings
Fig. 1 is a schematic diagram of the structure of the present utility model. (Inlet, outlet marking)
FIG. 2 is a schematic view of the valve core structure of the present utility model;
FIG. 3 is a left side view of the valve core structure of the present utility model;
FIG. 4 is a right side view of the valve cartridge structure of the present utility model;
FIG. 5 is a schematic view of the present utility model in a closed state;
FIG. 6 is a schematic view of the present utility model in an open state;
wherein, 1-locking the nut; 2-a housing; 3-adjusting the plugging cap assembly; 4-a spring seat assembly; 5-a spring; 6, a sealing ring; 7-area difference valve core assembly; 8-valve seat assembly, 9-pressure guiding hole, 10, side pressure guiding hole.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. In addition, the technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
As shown in FIG. 1, an area difference direct-acting overflow valve comprises a shell 2, one end in the shell 2 set up and adjust stifled cap subassembly 3, the other end sets up disk seat subassembly 8 in the shell 2, the shell in still be provided with pressure limiting switch (including spring holder subassembly 4 and spring 5), area difference case subassembly 7 one end and disk seat subassembly 8 contact, the other end and pressure limiting switch contact, the pressure limiting switch other end and adjust stifled cap subassembly 3 contact, area difference case subassembly 7 inside be provided with draw pressure hole 9, draw pressure hole 9 intercommunication shell 2 inner chamber and disk seat subassembly 8 import, disk seat subassembly 8 import and system pipeline intercommunication, area difference case subassembly 7 and disk seat subassembly 8 contact' S one side end surface area is S1, and one side end surface area with pressure limiting switch contact is S2, wherein S1 is greater than S2. The hydraulic pressure born by the right end of the valve core assembly 7 is P× (S1-S2), and due to the existence of the pressure guiding hole 9 and the area difference, the hydraulic pressure born by the right end of the valve core assembly 7 is reduced from the traditional P× (S1-S2) to P× (S1-S2), when the valve core assembly 7 is static, the hydraulic pressure born by the right end of the valve core assembly 7 is equal to the elastic force of the spring 5, the spring force is greatly reduced, the design difficulty of the spring 5 is greatly reduced, the stress under the working condition is greatly reduced, and the service life of the spring 5 is prolonged.
Further, the area difference valve core assembly 7 comprises a valve core, a protection ring and a sealing ring 6, the valve core is in sliding fit with the inner cavity 2 of the shell, and the protection ring and the sealing ring 6 are arranged on the matching surface of the valve core and the inner cavity 2 of the shell. The combination of the protective ring and the sealing ring 6 reduces the friction force between the valve core and the inner cavity of the shell 2 when moving, and simultaneously ensures zero leakage between the valve core and the inner cavity of the shell.
Further, the adjusting plug cap assembly 3 is fixed at one end in the shell 2 through the lock nut 1. The connection reliability of the regulating block cap assembly 3 and the housing 2 is ensured.
Further, the pressure limiting switch comprises a spring 5 and two spring seat assemblies 4, the two spring seat assemblies 4 are respectively in one-to-one contact with the regulating plug cap assembly 3 and the valve core, and the spring 5 is arranged between the two spring seat assemblies 4. The pressure limiting switch ensures that the area difference spool assembly 7 opens and closes within a prescribed pressure range.
Further, the spring seat assembly 4 comprises a spring seat and a steel ball arranged on the end face of the spring seat. The stability of automatic alignment in the movement process of the pressure limit switch is realized.
Further, the pressure guiding hole 9 is arranged inside the valve core, the pressure guiding hole 3 comprises a main pressure guiding hole and three lateral pressure guiding holes 10, the lateral pressure guiding holes 10 are communicated with the inner cavity of the main pressure guiding hole and the inner cavity of the shell 2, and the main pressure guiding holes and the lateral pressure guiding holes 10 are communicated with the right end and the left end of the valve core and are communicated with a system through the valve seat assembly 8. The pressure guiding hole 9 guides the pressure at the right end of the valve core to the left end, so that the effect that the pressure at the two ends of the valve core is equal is realized, the hydraulic pressure born by the right end of the valve core is greatly reduced under the arrangement of the area difference of the two ends of the valve core, the design difficulty of the spring 5 at the left end of the valve core is reduced, the stress of the spring 5 is reduced, the service life of the spring 5 is prolonged, the product volume is reduced, and the weight is reduced.
Further, a sealing ring 6 and a protection ring are arranged between the adjusting plug cap assembly 3 and the inner wall of the shell 2, and a sealing ring 6 is arranged between the spring seat assembly 4 and the inner wall of the shell 2. The product sealing is ensured, and the reliability of the product in working under high pressure is realized.
Further, a sealing ring 6 is arranged on the outer cylindrical surface of the shell 2, and a sealing ring 6 and a protection ring are arranged on the outer cylindrical surface of the valve seat assembly 8. The sealing of the connection between the product and the system is ensured, and the reliability of the product in working under high pressure is realized.
Further, the right end face of the valve core is contacted with the left end face of the valve seat assembly 8 to form a seal, so that the inlet and the outlet of the area difference direct-acting overflow valve are isolated. The function of cutting off the oil path in the range of the regulated pressure value is realized.
The materials and specifications of the parts are shown in Table 1. The product performance parameters are shown in Table 2. When the pressure of the system exceeds the allowable pressure, hydraulic oil overcomes the force of the spring 3 through the valve seat assembly 4 and the area difference valve core assembly 7, so that the product is pushed to be opened, and the pressure is relieved through the product, so that the safety of the system is ensured.
TABLE 1
TABLE 2
Working principle: when the inlet pressure of the product is smaller than the opening pressure, the inlet pressure enters the inner cavity of the shell 2 from the right end of the valve core through the valve core pressure guiding hole 9 and the left end of the valve core, the pressures at the two ends of the valve core are equal, the valve core is in contact fit with the valve seat under the action of spring force and hydraulic force, an oil way is cut off, when the inlet pressure of the product rises until the opening pressure of the product is reached, the hydraulic force P× (S1-S2) borne by the right end of the valve core is larger than the spring force, the valve core moves rightwards against the spring force under the action of the hydraulic force, the valve core is separated from the sealing surface of the valve seat, the inlet and the outlet of the product are communicated, and pressure relief is started.
Claims (9)
1. The utility model provides an area difference direct-acting overflow valve, its characterized in that, includes the casing, the casing in one end set up and adjust stifled cap subassembly, the other end sets up the disk seat subassembly in the casing, the casing in still be provided with pressure limit switch, area difference case subassembly one end and disk seat subassembly contact, the other end contacts with pressure limit switch, the pressure limit switch other end contacts with adjusting stifled cap subassembly, area difference case subassembly inside be provided with the pressure guiding hole, pressure guiding hole intercommunication casing inner chamber and disk seat subassembly import, disk seat subassembly import and system pipeline intercommunication, case subassembly and the one side terminal surface area of disk seat subassembly contact be S1, the one side terminal surface area of contact with pressure limit switch is S2, wherein S1 is greater than S2.
2. The area difference direct-acting overflow valve according to claim 1, wherein the area difference valve core assembly comprises a valve core, a protection ring and a sealing ring, the valve core is in sliding fit with the inner cavity of the shell, and the protection ring and the sealing ring are arranged on the matching surface of the valve core and the inner cavity of the shell.
3. The differential area direct-acting relief valve of claim 1, wherein said adjustment cap assembly is secured at one end within the housing by a lock nut.
4. The area difference direct-acting overflow valve according to claim 3, wherein the pressure limiting switch comprises a spring and two spring seat assemblies, the two spring seat assemblies are respectively in one-to-one contact with the regulating plug cap assembly and the valve core, and the spring is arranged between the two spring seat assemblies.
5. The differential area direct-acting relief valve of claim 4, wherein the spring seat assembly comprises a spring seat and a steel ball disposed on an end surface of the spring seat.
6. The area differential direct-acting relief valve of claim 1, wherein the pilot hole is disposed within the valve core, the pilot hole comprising a main pilot hole and three lateral pilot holes, the lateral pilot holes communicating the main pilot hole with the housing cavity, the main pilot hole communicating the valve seat assembly inlet with the system conduit.
7. The differential area direct-acting overflow valve of claim 4, wherein a sealing ring and a protecting ring are arranged between the adjusting plug cap assembly and the inner wall of the housing, and a sealing ring is arranged between the spring seat assembly and the inner wall of the housing.
8. The area difference direct-acting overflow valve as claimed in claim 1, wherein the outer cylindrical surface of the housing is provided with a sealing ring, and the outer cylindrical surface of the valve seat assembly is provided with a sealing ring and a protection ring.
9. The differential area direct-acting relief valve of claim 2, wherein the contact between the right end surface of the valve element and the left end surface of the valve seat assembly forms a seal that isolates the inlet from the outlet of the differential area direct-acting relief valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223034913.4U CN218953686U (en) | 2022-11-14 | 2022-11-14 | Area difference direct-acting overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223034913.4U CN218953686U (en) | 2022-11-14 | 2022-11-14 | Area difference direct-acting overflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218953686U true CN218953686U (en) | 2023-05-02 |
Family
ID=86105505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223034913.4U Active CN218953686U (en) | 2022-11-14 | 2022-11-14 | Area difference direct-acting overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218953686U (en) |
-
2022
- 2022-11-14 CN CN202223034913.4U patent/CN218953686U/en active Active
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