CN213332475U

CN213332475U - Valve with a valve body

Info

Publication number: CN213332475U
Application number: CN202020775027.9U
Authority: CN
Inventors: 孔德强
Original assignee: Bosch Rexroth Changzhou Co Ltd
Current assignee: Bosch Rexroth Changzhou Co Ltd
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2021-06-01
Anticipated expiration: 2030-05-12

Abstract

The present application provides a valve. The valve includes: a spool having one end attached to a spring located in a pressure side spring chamber, the spring being configured to be in a pressure state when the spool is operated; the oil drainage oral cavity is communicated with the pressure side spring chamber; a working oil port configured to selectively communicate with the drain port by movement of the valve element; a throttling device provided in a flow passage between the drain port and the pressure receiving side spring chamber and configured to alleviate a fluid shock to the pressure receiving side spring chamber. The valve has the advantages of simplicity, reliability, easiness in implementation, convenience in use and the like, stress fluctuation on the valve rod can be eliminated, and the operation reliability is improved.

Description

Valve with a valve body

Technical Field

The present application relates to the field of valve structures and fluid routing. More particularly, the present application relates to a valve that is intended to reduce the impact of fluid impingement on the normal operation of the valve.

Background

Numerous valve assemblies have been used in the manufacturing field. A typical directional valve employs a movable valve stem to control the direction of flow and ingress of working fluid. One end of the valve stem may be provided with a spring, and a pressure side spring chamber for providing the spring may be configured to be in communication with a flow passage of the working fluid. In some use conditions, when it is desired to establish fluid communication between specific ports on the directional valve, fluid will enter the flow passage from the input port and at least a portion of the fluid will enter the pressure side spring chamber.

However, in the above process, the fluid entering the pressure side spring chamber may generate a short impact force, which may have a potential influence on the valve stem, for example, causing instability or vibration of the valve stem for a short time. Such a force variation is generally undesirable in production field operations because it carries potential vibration and risk of failure.

Accordingly, there is a continuing need for new in-valve fluid routing solutions. It is desirable that new solutions alleviate the above problems at least to some extent.

Disclosure of Invention

It is an object of an aspect of the present application to provide a valve that aims to provide a smooth fluid flow solution within the valve.

The purpose of the application is realized by the following technical scheme:

a valve, comprising:

a spool having one end attached to a spring located in a pressure side spring chamber, the spring being configured to be in a pressure state when the spool is operated;

the oil drainage oral cavity is communicated with the pressure side spring chamber;

a working oil port configured to selectively communicate with the drain port by movement of the valve element;

a throttling device provided in a flow passage between the drain port and the pressure receiving side spring chamber and configured to alleviate a fluid shock to the pressure receiving side spring chamber.

In the above valve, optionally, the throttling device comprises a body removably disposed in the flow passage, the body being provided with a communication portion configured to mitigate fluid impingement between an upstream side of the body and a downstream side of the body.

In the above valve, optionally, the body is configured to have a substantially cylindrical outer shape and includes a side surface and two end surfaces, and the communication portion includes a first groove provided on an outer surface of the side surface of the body around a radial periphery of the body.

In the above valve, optionally, the communication portion further includes a second groove extending from one end of the body to the first groove on an outer surface of the side surface of the body.

In the above valve, optionally, the body is configured to have a substantially cylindrical outer shape and includes a side surface and two end surfaces, the communication portion includes a first passage extending from the end surface of the body to the side surface of the body, and the first passage includes a first portion extending in an axial direction of the body and a second portion extending in a radial direction of the body.

In the above valve, optionally, the first portion extends from one end face of the body to the other end face, and the first portion is sized to accommodate the throttling insert and the plug.

In the above valve, optionally, the communication portion is configured to have a cross section of 0.5 to 5 square millimeters.

In the above valve, optionally, the working oil port communicates with the working oil port, and the oil drain port communicates with the first oil drain port.

In the above valve, optionally, the flow passage includes a first section communicating with the first drain port, a third section communicating with the second drain port, and a second section communicating the first section with the third section.

In the above valve, optionally, the throttle means is provided in the third section of the flow passage through the second drain port.

In the above valve, optionally, the throttling means is installed into the second section or the third section of the flow passage through the installation hole.

In the above valve, optionally, the throttling means is formed integrally with the flow passage, the throttling means includes a communicating portion, and the communicating portion is configured to alleviate a fluid shock between an upstream side of the throttling means and a downstream side of the throttling means.

The valve has the advantages of simplicity, reliability, easiness in implementation, convenience in use and the like, stress fluctuation on the valve rod can be eliminated, and the operation reliability is improved.

Drawings

The present application will now be described in further detail with reference to the accompanying drawings and preferred embodiments. Those skilled in the art will appreciate that the drawings are designed solely for the purposes of illustrating preferred embodiments and that, accordingly, should not be taken as limiting the scope of the present application. Furthermore, unless specifically stated otherwise, the drawings are intended to be conceptual in nature or configuration of the depicted objects and may contain exaggerated displays. The figures are also not necessarily drawn to scale.

FIG. 1 is a cross-sectional perspective view of one embodiment of the valve of the present application.

FIG. 2 is a perspective view of one embodiment of a flow restriction device of the present application.

Fig. 3 is a perspective view of another embodiment of a flow restriction device of the present application.

Fig. 4 is a perspective view of yet another embodiment of a flow restriction device of the present application.

Fig. 5 is a cross-sectional view of the embodiment shown in fig. 4.

FIG. 6 is a cross-sectional view of yet another embodiment of a flow restriction device of the present application.

FIG. 7 is a cross-sectional perspective view of the embodiment of the valve shown in FIG. 1 after installation of the embodiment of the restriction device shown in FIG. 2.

Fig. 8 is a partially enlarged view of the portion X in fig. 7.

Detailed Description

Hereinafter, preferred embodiments of the present application will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the descriptions are illustrative only, exemplary, and should not be construed as limiting the scope of the application.

First, it should be noted that the terms top, bottom, upward, downward, and the like as used herein are defined with respect to the orientation in the drawings. These orientations are relative concepts and will therefore vary depending on the position and state in which they are located. These and other directional terms are not to be construed in a limiting sense.

Furthermore, it should also be noted that for any single technical feature described or implicit in the embodiments herein or shown or implicit in the drawings, these technical features (or their equivalents) can be continuously combined to obtain other embodiments not directly mentioned herein.

It should be noted that in different drawings, the same reference numerals indicate the same or substantially the same components.

The axial direction referred to herein refers to the direction in which the axis of symmetry of the cylindrical throttle device lies. The radial direction referred to in this context means the direction of a ray on a plane perpendicular to the axis of symmetry of the cylindrical throttle device, which ray originates from the intersection of the plane and the axis of symmetry.

FIG. 1 is a cross-sectional perspective view of one embodiment of the valve of the present application. The valve 100 may have the general structure of a directional valve. For example, the valve 100 may have a housing 110, and a working oil chamber 120 communicating with a working oil port and a drain oil chamber 130 communicating with a drain oil port are formed in the housing 110. It is easily understood that the first drain port TA on the casing 110 is located below the flow path identified by the broken line on the left side in fig. 1, and the second drain port TB is located below the flow path identified by the broken line on the right side in fig. 1. For example, in the illustrated embodiment, a flow passage is formed between the working oil chamber 120 and the pressure receiving side spring chamber 150, and includes a first section 121a, a second section 121b, and a third section 121 c. The first section 121a may be configured as part of the drain port 130 and be in direct communication with the first drain port TA. The third section 121c may be configured as a portion of the cavity that communicates with the second drain port TB. The second section 121b is configured to communicate the first section 121a with the third section 121 c. The spool 140 carried by the driver 200 is at least partially in communication with the flow passage, e.g., in the illustrated embodiment, one end of the spool 140 is disposed in the pressure side spring chamber 150 by a spring 141, and the pressure side spring chamber 150 is in fluid communication with the third section 121c of the flow passage.

In use, the driver 200 is energized and urges the spool 140 to the right in fig. 1, and the spring 141 in the spring chamber 150 on the right is in a pressurized state when the spool 1400 is operating, and is therefore referred to herein as the pressure side spring chamber 150. The working fluid from the working oil port 120 will travel through the first section 121a, the second section 121b and the third section 121c of the channel, as shown by the arrows in fig. 1. During travel, working fluid also enters the pressure side spring chamber 150, causing an impact on the stable stressed structure of the spool 140 and the spring 141. For example, the impact and pressure forces from the working fluid may cause the force on the valve spool 140 to fluctuate over a short period of time, thereby causing the valve spool 140 to vibrate and presenting a potential failure risk. When the driver 200 is de-energized, the spring 141 will return and the spool 140 will move back into the initial position.

It is noted that the embodiments of the directional valve 100 employed herein typically have ports numbered T (including TA and TB), A, B, and P. By way of example, the working oil port 120 communicates with the working oil port a, and the drain oil port 130 communicates with the first drain oil port TA. Other communication modes can be adopted according to actual needs.

Although not shown, it is easily understood that ports such as the working oil port a, the working oil port B, and the oil inlet P are also provided on the housing of the valve and communicate with the chambers inside the valve shown in fig. 1, respectively. For clarity, the flow passages between the partial chambers and the ports inside the valve are not shown in fig. 1.

FIG. 2 is a perspective view of one embodiment of a flow restriction device of the present application. One embodiment of the flow restriction device 300 is generally configured to have a cylindrical outer shape and the body 310 thereof is shaped to fit within the flow passage of the valve 100. For example, the throttle 300 may be disposed at any suitable location from the working oil chamber 120 to the pressure side spring chamber 150, and the throttle 300 is contoured to fit the inner wall of the flow passage.

The first end 321 and the second end 322 of the throttle device 300 each have a substantially circular cross-section, and a communication portion 330 is further provided on the side surface of the body 310. The communication part 330 may have various configurations. In the illustrated embodiment, the communication portion 330 is configured as a groove extending along the periphery of the body 310, and is positioned such that the communication portion 330 can communicate the upstream side of the body 310 with the downstream side of the body 310 when the throttle device 300 is mounted in place. The communication portion 330 may include one or more grooves, for example, may be configured as a plurality of grooves distributed in the axial direction. The grooves may be connected to each other or separated from each other. The communication portions 330 may be provided on the same axial plane, or may be provided to be inclined with respect to the axial plane.

Fig. 3 is a perspective view of another embodiment of a flow restriction device of the present application. As shown, throttle device 400 also has a generally cylindrical body 410, a first end 421 and a second end 422. The communication portion includes a first groove 430 provided on a side surface of the body 410 and extending along the entire circumference of the body 410. Further, the communication portion further includes a second groove 431 provided on a side surface of the body 410 and extending in the axial direction. Second slot 432 may extend from first slot 430 all the way to first end 421, enabling fluid communication to be established between first end 421 and first slot 430.

Fig. 4 is a perspective view of yet another embodiment of a flow restriction device of the present application, and fig. 5 is a cross-sectional view of the embodiment shown in fig. 4. As shown, throttle device 500 also has a generally cylindrical body 510, a first end 521, and a second end 522. A first channel is provided between the side of the body 510 and the first end 521. For example, the first passage extends from the first port 530 all the way to the second port 531. In the cross-sectional view shown in fig. 5, the first passage includes a first portion 530a extending in a radial direction of the body 510 and a second portion 530b extending in an axial direction of the body 510. The first channel may also be implemented in any other suitable form.

The communication portion of each of the above embodiments may have a suitable cross-sectional area to restrict the flow rate of the working fluid conducted through the communication portion. For example, the communication portion may be configured to have a size of about 0.5 to 5 square millimeters.

FIG. 6 is a cross-sectional view of yet another embodiment of a flow restriction device of the present application. As shown, the throttle device 600 has a generally cylindrical body 610, a first end 621, and a second end 622. A first channel 631 extends between the first and second ends 621, 622, and a second channel 632 is disposed between the first channel 631 and the side of the body 610. Different sections of the first channel 631 may have different inner diameters, and the interior of the first channel 631 may be provided with a throttling insert and plug. For example, the throttle insert 641 may be disposed within the first channel 631 between the second channel 632 and the first end 621, and the plug 642 may be disposed within the first channel 631 between the second channel 632 and the second end 622. In addition, plug 642 may be mounted in place by bolts 650.

The various embodiments of the above-described throttling device are capable of mitigating fluid impingement between the upstream end of the body and the downstream end of the body when installed for use. For example, both the grooves on the outer surface of the body and the passages within the body effectively reduce the flow area available for the working fluid, thereby reducing the flow of the working fluid and effectively reducing the impact of the working fluid from the working oil pockets 120 to the pressure side spring chambers 150.

FIG. 7 is a cross-sectional isometric and partially enlarged view of the embodiment of the valve shown in FIG. 1 after installation of the embodiment of the flow restriction device shown in FIG. 2, and FIG. 8 is a partially enlarged view of section X of FIG. 7. For the sake of clarity, the section in fig. 7 is not a cross section seen on a single plane, but an appropriate cross section is taken in order to more clearly show the positional relationship of the respective components. Furthermore, the throttle device 300 is shown in its entirety for the sake of clarity. As shown, the flow restriction 300 is disposed in the third section 121c of the flow passage through port TB. In an embodiment not shown, the throttle device 300 may also be arranged in the second section 121b of the flow channel. As shown in the enlarged view of fig. 8, the side surface of the body 310 of the throttle device 300 is disposed adjacent to the inner wall of the flow passage, and the communication portion 330 provides a necessary flow path for the working fluid.

Furthermore, a throttling means may also be provided into the second section 121b or the third section 121c of the flow passage through other mounting holes in the body to provide a throttling effect.

In use, the flow of the working fluid from the working oil chamber 120 to the pressure side spring chamber 150 is restricted by the communication portion, so that the impact of the working fluid on the spring 141 and the spool 140 inside the pressure side spring chamber 150 is reduced, the occurrence of vibration and force fluctuation is avoided, and the working stability and reliability of the valve are effectively improved.

In another embodiment of the application, the restriction is not a separate part, but may merge into the flow passage. For example, the throttling means may be a narrowing portion of the flow passage, and the narrowing portion of the flow passage forms a communication portion. The communication portion is configured to alleviate fluid shock between upstream of the throttling device and downstream of the throttling device. For example, in an embodiment similar to the valve shown in fig. 1, at least a portion of the second section 121b or the third section 121c may narrow and form a throttling means and a communication.

This written description discloses the application with reference to the drawings, and also enables one skilled in the art to practice the application, including making and using any devices or systems, selecting appropriate materials, and using any incorporated methods. The scope of the present application is defined by the claims and encompasses other examples that occur to those skilled in the art. Such other examples are to be considered within the scope of protection defined by the claims of this application, provided that they include structural elements that do not differ from the literal language of the claims, or that they include equivalent structural elements with insubstantial differences from the literal language of the claims.

Claims

1. A valve, comprising:

a spool (140) having one end attached to a spring (141) located in a pressure side spring chamber (150), the spring (141) being configured to be in a pressure state when the spool (140) operates;

a drain mouth (130), the drain mouth (130) communicating with the pressure side spring chamber (150);

a working oil port (120) configured to selectively communicate with a drain port (130) by movement of the spool (140);

a throttling device provided in a flow passage between the drain port (130) and the pressure-side spring chamber (150), and configured to mitigate fluid impact to the pressure-side spring chamber (150).

2. The valve of claim 1, wherein the throttling device comprises a body removably disposed in the flow passage, the body having a communication disposed thereon configured to mitigate fluid impingement between an upstream side of the body and a downstream side of the body.

3. The valve of claim 2, wherein the body is configured to have a generally cylindrical outer shape and includes a side surface and two end surfaces, the communication portion including a first groove disposed on an outer surface of the side surface of the body around a radial periphery of the body.

4. A valve according to claim 3, wherein the communication further comprises a second groove (431), the second groove (431) extending from one end of the body to the first groove on the outer surface of the side of the body.

5. The valve of claim 2, wherein the body is configured to have a generally cylindrical outer shape and includes a side surface and two end surfaces, the communication portion including a first passage extending from the end surface of the body to the side surface of the body, the first passage including a first portion (530a) extending in an axial direction of the body and a second portion (530b) extending in a radial direction of the body.

6. The valve of claim 5, wherein the first portion extends from one end surface to the other end surface of the body, and the first portion is sized to accommodate the provision of a throttling insert (641) and a plug (642).

7. A valve according to any of claims 2 to 6, wherein the communication is configured to have a cross-section of 0.5 to 5 square millimetres.

8. Valve according to any one of claims 1 to 6, characterized in that said working oil mouth (120) communicates with a working oil port (A) and said drainage mouth (130) communicates with a first drainage port (TA).

9. A valve according to claim 8, characterized in that the flow passage comprises a first section (121a) communicating with the first drainage port (TA), a third section (121c) communicating with a second drainage port (TB), and a second section (121b) communicating the first section (121a) with the third section (121 c).

10. A valve according to claim 9, characterized in that the throttling means is arranged in the third section (121c) of the flow passage via the second drain port (TB).

11. A valve according to claim 9, wherein the flow restriction is mounted into the second section (121b) or the third section (121c) of the flow passage by means of a mounting hole.

12. The valve of claim 1, wherein the throttling device is integrally formed with the flow passage, the throttling device includes a communication, and the communication is configured to mitigate fluid impingement between an upstream side of the throttling device and a downstream side of the throttling device.