CN215890649U - Hydraulic one-way valve - Google Patents
Hydraulic one-way valve Download PDFInfo
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- CN215890649U CN215890649U CN202122456516.5U CN202122456516U CN215890649U CN 215890649 U CN215890649 U CN 215890649U CN 202122456516 U CN202122456516 U CN 202122456516U CN 215890649 U CN215890649 U CN 215890649U
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Abstract
The existing one-way valve has the problems of unreliable sealing, low frequency response characteristic and the like. The utility model discloses a hydraulic one-way valve which is mainly characterized by high frequency response characteristic and reliable sealing. The main structure of the check valve comprises a valve body, a valve core and a spring, and the liquid flow channel is designed on the valve body, so that the guide mechanism of the valve core is simplified, the quality of the valve core is obviously reduced, and the frequency response characteristic of the check valve is greatly improved; the valve core guide mechanism enables the valve body sealing ring belt and the valve core sealing ring belt to be in a coaxial state all the time in the valve core movement process, ensures that a valve body sealing surface and a valve core sealing surface can form a stable sealing ring belt, ensures the reliable sealing of the one-way valve, solves the problem that the existing one-way valve is difficult to use in a high-frequency working environment, and enlarges the application range of the one-way valve.
Description
Technical Field
The utility model belongs to the technical field of hydraulic elements, and particularly relates to a hydraulic one-way valve with a high-frequency response characteristic.
Background
The check valve is one of directional control valves in a hydraulic system, and is also called a check valve or a check valve, and has the function of enabling liquid to flow in one direction only and stopping in the opposite direction, so that the function of preventing the backflow of the flowing liquid is achieved.
According to the structural type of the valve core, the one-way valve can be divided into a one-way valve with a guide mechanism and a one-way valve without a guide mechanism. The one-way valve with the steel ball type valve core is a typical one-way valve without a guide mechanism, and has a simple structure, but because of the absence of the guide mechanism, sealing is easy to lose efficacy, and vibration and noise are easy to generate due to instability during working. The one-way valve with the guide mechanism has good guidance and sealing performance and stable work, but has a complex structure, particularly the guide mechanism has a large size, so that the valve core has large mass, the frequency response characteristic is poor, and the one-way valve is difficult to use in a high-frequency working environment.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art of the one-way valve, the utility model aims to provide the one-way valve with high frequency response characteristic and reliable sealing, which is mainly characterized in that a valve core guide mechanism is small in size and light in weight, so that the one-way valve is reliable in sealing and high in frequency response characteristic.
The utility model adopts the following technical scheme:
a hydraulic check valve comprising: a valve core, a valve body and a spring;
the valve core is provided with a sealing surface, a guide cylinder and a spring mounting seat;
the valve body is provided with a sealing surface, a liquid flow channel, a guide channel, a spring seat, an oil outlet and an oil inlet;
the valve core is arranged in the valve body, a sealing surface of the valve body and a sealing surface of the valve core are mutually matched to form a sealing ring belt, and the sealing ring belt and the valve body form a first oil cavity and a second oil cavity; the first oil cavity is internally provided with an oil inlet, a liquid flow channel and a guide channel of the valve body, and the valve core guide cylinder is in clearance fit with the guide channel of the valve body, so that the guide cylinder can do reciprocating linear motion in the guide channel; the second oil cavity is internally provided with an oil outlet and a spring seat of the valve body, the spring is arranged between the spring seat of the valve body and the spring mounting seat of the valve core, and the spring applies pressure to the valve core to enable the sealing surface of the valve core and the sealing surface of the valve body to form sealing.
Furthermore, the valve body is provided with two or more than two guide blocks, each guide block is provided with a concentric arc surface, the two or more than two concentric arc surfaces form a guide channel, the valve core guide cylinder can do reciprocating linear motion in the guide channel, and a liquid flow channel is arranged between the adjacent guide blocks.
Furthermore, the cross section of the liquid flow channel between two adjacent guide blocks is in a fan shape.
Furthermore, the valve body is provided with a guide cylindrical surface, the valve core guide cylindrical body can do reciprocating linear motion in the valve body guide cylindrical surface, and two or more than two liquid flow channels are arranged around the valve body guide cylindrical surface.
Furthermore, the sealing surface of the valve core and the valve body is in a conical shape, a circular arc shape or a circular ring shape.
Furthermore, the valve core spring mounting seat is of a pit type.
Furthermore, the valve core guide cylinder is of a hollow structure.
The working principle of the one-way valve is as follows: when the one-way valve works, the oil pressure P in the first oil cavity of the valve body1With the pressure P of the oil in the second oil chamber2Forming a pressure difference Δ P (Δ P ═ P)1-P2) When the axial force is larger than the pretightening force of the spring, the spring is compressed, and the oil pushes the valve core open to enter the second oil cavity and flow out through the oil outlet of the valve body; when the axial force is smaller than the compression force of the spring, the valve core falls back under the action of the spring, the valve core guide cylinder moves in the valve body guide channel, the valve body sealing surface and the valve core sealing surface are kept in a coaxial state in the valve core movement process, the sealing ring belt keeps reliable sealing when the valve core is seated, and the one-way valve is closed.
According to the natural vibration frequency formula
It is known that, in a vibrating body formed by a check valve spool and a spring, the mass of the spool is increased by a check valve guide mechanism, and the natural frequency response characteristic of the check valve is deteriorated. In order to improve the natural frequency of the one-way valve, the utility model designs the liquid flow channel on the valve body, the valve core spring mounting seat is designed to be a pit type, and the valve core guide cylinderThe valve core is obviously lightened by adopting a hollow structure and the like, so that the frequency response characteristic of the one-way valve is greatly improved.
The valve core guide mechanism is formed by concentric arc surfaces formed by the valve core guide cylinder and the valve body guide block, and the valve core guide mechanism ensures that a valve body sealing surface and a valve core sealing surface are always in a coaxial state in the valve core movement process, so that the valve body sealing surface and the valve core sealing surface can stably and reliably form a sealing ring belt, and further the reliable sealing of the check valve is ensured.
In addition, in the structure of the valve body, the cross section shape of the liquid flow channel between two adjacent guide blocks is designed into a fan shape, and the area of the liquid flow channel of the valve body is ensured to the maximum extent within the range allowed by the structure.
Compared with the prior art, the utility model has the beneficial effects that:
(1) the liquid flow channel is designed on the valve body, so that the quality of the valve core is obviously reduced, and the frequency response characteristic of the one-way valve is greatly improved.
(2) The one-way valve ensures that the sealing surface of the valve body and the sealing surface of the valve core are always in a coaxial state in the movement process of the valve core through the valve core guide mechanism, ensures that the sealing surface of the valve body and the sealing surface of the valve core can stably and reliably form a sealing ring belt, and ensures the reliable sealing of the one-way valve.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrating exemplary embodiments of the utility model and the description of the utility model.
Fig. 1 is a schematic view of an overall structure of a hydraulic check valve according to embodiment 1 of the present invention.
Fig. 2 is a schematic view of the spring seat structure of embodiment 1 and embodiment 2.
Fig. 3 is a schematic view of the valve body structure of embodiment 1 and embodiment 2.
Fig. 4 is a front view of the valve body of embodiment 1.
Fig. 5 is a sectional view of the valve body of embodiment 1.
Fig. 6 is a front view of the valve body of embodiment 2.
Fig. 7 is a sectional view of the valve body of embodiment 2.
Fig. 8 is a front view of the upper valve body of embodiment 3.
Fig. 9 is a front view of the lower valve body of embodiment 3.
Fig. 10 is a top view of the lower valve body of embodiment 3.
Reference numerals:
1. the oil inlet, the oil outlet, the liquid flow channel, the guide block, the 516 circular arc surface, the 520 circular arc surface, the oil outlet, the 522 circular arc surface, the 523 circular arc surface, the oil inlet, the 524 circular arc surface, the 520 circular arc surface, the 522 circular arc surface, the 523 circular arc surface, the 6 circular arc surface, the 7 circular arc surface, the 8 circular arc surface, the 9 circular arc surface, the 7 circular arc surface, the 5 circular arc surface, the 510 circular arc surface, the 511 circular arc surface, the 520 circular arc surface, the 531 circular arc surface, the 532 circular arc surface, the 533 circular arc surface, the 532 circular arc surface, the 531 circular arc surface, the oil outlet, the 533 circular arc surface, the guide channel, the 535 circular arc surface, the 536, the circular arc surface, the 7 circular arc surface, the 8 circular arc surface, the oil cavity, and the 42.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the utility model as claimed. 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 invention belongs.
In addition, the term "high frequency" as used in the present embodiment means that the check valve is opened and closed more than hundred times per minute.
Example 1:
as shown in fig. 1 to 5, the present embodiment provides a hydraulic check valve including a valve element 4, a valve body 5, a spring 3, and a sealing gasket 6.
As shown in fig. 2, the spring seat 1 is in threaded connection with the valve body 5;
the valve core 4 is provided with a sealing surface 42, a guide cylinder 43 and a spring mounting seat 41 as shown in FIG. 3;
as shown in fig. 4 and 5, the valve body 5 is provided with a sealing surface 511, a liquid flow passage 514, a guide passage 512, a spring seat 1, an oil outlet 510 and an oil inlet 513;
the valve core 4 is arranged in the valve body 5, a sealing surface 511 of the valve body 5 and a sealing surface 42 of the valve core 4 are mutually matched to form a sealing ring belt 7, and the sealing ring belt 7 and the valve body 4 form a first oil cavity 8 and a second oil cavity 9; the first oil chamber 8 is internally provided with an oil inlet 510, a liquid flow channel 514 and a guide channel 512 of the valve body 5, and the guide cylinder 43 of the valve core 4 is in clearance fit with the guide channel 512 of the valve body 5, so that the guide cylinder 43 can do reciprocating linear motion in the guide channel 512; the second oil chamber 9 contains an oil outlet 510 of the valve body 5 and the spring seat 1, the spring 3 is installed between the spring seat 1 of the valve body 5 and the spring installation seat 41 of the valve core 4, and the spring 3 applies pressure to the valve core 4 to enable the sealing surface 42 of the valve core 4 and the sealing surface 511 of the valve body 5 to form sealing.
The valve body 5 is provided with four guide blocks 515, each guide block 515 is provided with a concentric arc surface 516, the four concentric arc surfaces 516 form a guide channel, the guide cylinder 43 of the valve core 4 can do reciprocating linear motion in the guide channel 512, and a liquid flow channel 514 is arranged between the adjacent guide blocks 515.
The cross-sectional shape of the fluid passage 514 between two adjacent guide blocks 515 is a sector. The sealing surface of the valve core 4 and the valve body 5 is conical. The valve core 4 spring mounting seat 41 is of a pit type. The guide cylinder 43 of the valve core 4 is of a hollow structure. The oil seal in the oil inlet 513 is maintained by the provision of a sealing gasket 6.
The working principle of the one-way valve is as follows: when the one-way valve works, the oil pressure P in the first oil chamber 8 of the valve body 51And the oil pressure P in the second oil chamber 92Forming a pressure difference Δ P (Δ P ═ P)1-P2) When the axial force is larger than the pretightening force of the spring 3, the spring 3 is compressed, and the oil pushes the valve core 4 open to enter the second oil cavity 9 and flow out through the oil outlet 510 of the valve body 5; when the axial force is smaller than the compression force of the spring 3, the valve core 4 falls back under the action of the spring 3, the guide cylinder 43 of the valve core 4 moves in the guide channel 512 of the valve body 5, the sealing surface 511 of the valve body 5 and the sealing surface 42 of the valve core 4 are kept in a coaxial state in the movement process of the valve core 4, so that the sealing ring belt 7 keeps reliable sealing when the valve core 4 is seated,the one-way valve is closed.
According to the natural vibration frequency formula
It is found that in the oscillating body formed by the check valve spool 4 and the spring 3, the mass of the spool 4 is increased by the check valve guide mechanism, and the natural frequency response characteristic of the check valve is deteriorated. In order to improve the natural frequency of the check valve, the utility model obviously reduces the mass of the valve core 4 by designing the liquid flow channel 514 on the valve body 5, designing the spring mounting seat 41 of the valve core 4 into a pit type, designing the guide cylinder 42 of the valve core 4 into a hollow structure and the like, thereby greatly improving the frequency response characteristic of the check valve.
The one-way valve forms a valve core 4 guiding mechanism through a concentric arc surface 516 formed by a valve core 4 guiding cylinder 43 and a valve body 5 guiding block 515, the guiding mechanism ensures that a valve body 5 sealing surface 511 and a valve core 4 sealing surface 42 are always in a coaxial state in the movement process of the valve core 4, so that the sealing surface 511 of the valve body 5 and the valve core 4 sealing surface 42 can stably and reliably form a sealing ring belt 7, and further the reliable sealing of the one-way valve is ensured.
In addition, in the structure of the valve body, the cross-sectional shape of the liquid flow channel 514 between two adjacent guide blocks 515 is designed to be fan-shaped, and the area of the liquid flow channel 514 of the valve body 5 is ensured to the maximum extent allowed by the structure.
Example 2:
the spring and the valve body in embodiment 2 are the same as those in embodiment 1, and are different mainly in the structure of the valve body, and the structure of the valve body in this embodiment is as shown in fig. 6 and 7. The valve body 5 is provided with an oil outlet 520, a valve body sealing surface 521, a guide cylindrical surface 522, an oil inlet 520 and a liquid flow channel 524. A guide cylindrical surface 522 is provided along the axial direction of the valve body 5, the guide cylinder 43 of the spool 4 is capable of reciprocating linear motion in the guide cylindrical surface 522 of the valve body 5, and six fluid passages 524 are provided around the guide cylindrical surface 522 of the valve body 5.
The working principle and other structures of this embodiment are exactly the same as those of embodiment 1.
Example 3:
the spring and the valve core of embodiment 3 are the same as those of embodiment 1, but the difference lies in that the structure of the valve body is different, in this embodiment, the valve body includes two parts, namely an upper valve body and a lower valve body, the upper valve body and the lower valve body cooperate to form the valve body, and the spring seat 1 and the upper valve body are integrally formed, as shown in fig. 8, 9 and 10, the upper valve body includes a spring seat 531 and an oil outlet 532; the lower valve body includes a sealing surface 533, a guide passage 534, an oil inlet 535, a flow passage 536, a guide block 537, and a circular arc surface 538.
The working principle and other structures of this embodiment are exactly the same as those of embodiment 1.
In light of the foregoing description of preferred embodiments according to the utility model, it is clear that many changes and modifications can be made by the person skilled in the art without departing from the scope of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. A hydraulic check valve, comprising: a valve core, a valve body and a spring;
the valve core is provided with a sealing surface, a guide cylinder and a spring mounting seat;
the valve body is provided with a sealing surface, a liquid flow channel, a guide channel, a spring seat, an oil outlet and an oil inlet;
the valve core is arranged in the valve body, the sealing surface of the valve body and the sealing surface of the valve core are mutually matched to form a sealing ring belt, and the sealing ring belt and the valve body form a first oil cavity and a second oil cavity; the first oil cavity is internally provided with an oil inlet, a liquid flow channel and a guide channel of the valve body, and a guide cylinder of the valve core is in clearance fit with the guide channel of the valve body, so that the guide cylinder can do reciprocating linear motion in the guide channel; the second oil cavity is internally provided with an oil outlet and a spring seat of the valve body, the spring is arranged between the spring seat of the valve body and the spring mounting seat of the valve core, and the spring applies pressure to the valve core to enable the sealing surface of the valve core and the sealing surface of the valve body to form sealing.
2. The hydraulic check valve according to claim 1, wherein the valve body is provided with two or more guide blocks, each guide block is provided with a concentric circular arc surface, the two or more concentric circular arc surfaces form the guide passage, the guide cylinder of the spool is capable of reciprocating linear motion in the guide passage, and the liquid flow passage is provided between adjacent guide blocks.
3. The hydraulic check valve of claim 2, wherein a cross-sectional shape of the flow passage between adjacent guide blocks is a sector.
4. The hydraulic check valve according to claim 1, wherein a guide cylindrical surface is provided in said valve body in the axial direction of the valve body, the guide cylindrical surface of the spool is capable of reciprocating linear motion in said guide cylindrical surface, and two or more of said flow passages are provided around the guide cylindrical surface of the valve body.
5. The hydraulic check valve according to claim 1, wherein the sealing surface of the spool and the valve body is in the shape of a cone, a circular arc, or a circular ring.
6. The hydraulic check valve of claim 1, wherein the spring mount of the spool is a dimple type.
7. The hydraulic check valve of claim 1, wherein the pilot cylinder of the spool is hollow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122456516.5U CN215890649U (en) | 2021-10-12 | 2021-10-12 | Hydraulic one-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122456516.5U CN215890649U (en) | 2021-10-12 | 2021-10-12 | Hydraulic one-way valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215890649U true CN215890649U (en) | 2022-02-22 |
Family
ID=80250243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122456516.5U Active CN215890649U (en) | 2021-10-12 | 2021-10-12 | Hydraulic one-way valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215890649U (en) |
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2021
- 2021-10-12 CN CN202122456516.5U patent/CN215890649U/en active Active
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