CN212079796U - Electric modulation proportional direction valve - Google Patents
Electric modulation proportional direction valve Download PDFInfo
- Publication number
- CN212079796U CN212079796U CN202020621704.1U CN202020621704U CN212079796U CN 212079796 U CN212079796 U CN 212079796U CN 202020621704 U CN202020621704 U CN 202020621704U CN 212079796 U CN212079796 U CN 212079796U
- Authority
- CN
- China
- Prior art keywords
- groove
- valve core
- pilot valve
- pilot
- main
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Servomotors (AREA)
Abstract
The utility model discloses an electrical modulation proportion direction valve, include: the pilot valve comprises a pilot valve body, a pilot valve core arranged on the pilot valve body, a main valve core arranged on the main valve body, a pair of valve covers and a sealing ring, wherein the main valve core and the pilot valve core are respectively provided with a throttling groove, and the throttling groove on the main valve core is a main valve double-step throttling groove in a double-step shape; the throttling groove on the pilot valve core is a double-step-shaped pilot valve double-step throttling groove. The utility model discloses an electrical modulation proportion direction valve can not the oil impregnate in the working process, is favorable to the environmental protection, and can carry out the accurate regulation to the flow among the electrical modulation process, improves the steady quality of product and hydraulic system's work efficiency.
Description
Technical Field
The utility model relates to a hydrovalve technical field especially relates to an electrical modulation proportion direction valve.
Background
At present, a proportional direction valve is commonly used in a hydraulic system, has the functions of a proportional valve and a reversing valve, and can control the flow direction and the flow rate. The pilot type proportional direction valve is one of proportional direction valves, and is composed of a main valve and a pilot valve, so that the flow is large. However, in the prior art, the main valve of the pilot-type proportional directional valve often has an oil leakage phenomenon at the sealing position, which not only pollutes the environment, but also affects the flow regulation. In addition, the main valve and the pilot valve cannot make the mechanical part realize accurate position change in the electric modulation process, so that the flow cannot be accurately regulated, the quality of a product is unstable, and the working efficiency of a hydraulic system is influenced.
Disclosure of Invention
The utility model aims at solving the above problem, provide an electrical modulation proportion direction valve, can not the oil impregnate in the working process, be favorable to the environmental protection, and can carry out the accurate regulation to the flow among the electrical modulation process, improve the steady quality of product and hydraulic system's work efficiency.
For realizing the above purpose of the utility model, the utility model discloses an electric modulation proportion direction valve includes: the pilot valve comprises a pilot valve body, a pilot valve core arranged on the pilot valve body, a main valve core arranged on the main valve body, a pair of valve covers and a sealing ring, wherein the main valve core and the pilot valve core are respectively provided with a throttling groove, and the throttling groove on the main valve core is a main valve double-step throttling groove in a double-step shape; the throttling groove on the pilot valve core is a double-step-shaped pilot valve double-step throttling groove.
Wherein, the main valve dual-step throttling groove includes: the first trapezoid groove is formed in the outer wall of the main valve core and extends in a trapezoid shape along the axial direction of the main valve core; and the second trapezoid groove is formed in the outer wall of the main valve core and forms a step with the first trapezoid groove.
Preferably, the second trapezoidal groove is adjacent to the small end of the first trapezoidal groove and is a straight groove vertically arranged on the main valve core along the radial direction of the main valve core.
Preferably, the large end of the first dovetail groove is located at the junction of a first diameter section and a second diameter section of the main valve spool, and the diameter of the first diameter section is larger than that of the second diameter section.
Preferably, the depth of the first trapezoidal groove is greater than the depth of the second trapezoidal groove, and the depth is a dimension extending from the outer wall of the main valve core to the central direction.
Wherein, pilot valve double step throttling groove includes: the frustum groove is arranged on the outer wall of the pilot valve core and extends in a conical shape along the radial direction of the main valve core; the pilot valve core is arranged on the outer wall of the pilot valve core and forms a step-shaped arc-shaped groove with the frustum groove.
Preferably, the arc-shaped groove is located on a first diameter section of the pilot valve core, the frustum groove is located on a second diameter section and/or a first diameter section of the pilot valve core, and the diameter of the first diameter section is larger than that of the second diameter section.
Preferably, the arc-shaped groove is a straight groove vertically arranged on the pilot valve core along the radial direction of the pilot valve core.
Preferably, the depth of the frustum groove on the first diameter section is greater than the depth of the arc-shaped groove, and the depth is a size extending from the outer wall of the first diameter section of the pilot valve core to the center direction.
The sealing groove of the main valve body for installing the sealing ring is a special-shaped groove with a convex middle part and a concave periphery.
Preferably, the intermediate protrusion is a protrusion formed to protrude outward in a radial direction of the main valve element.
Or, the pilot valve dual-step throttling groove comprises: the long circular groove is formed in the outer wall of the pilot valve core and extends along the axial direction of the main valve core; the pilot valve core is arranged on the outer wall of the pilot valve core and forms a stepped arc-shaped groove with the long circular groove.
Compared with the prior art, the utility model discloses an electric modulation proportion direction valve has following beneficial effect:
1. the utility model discloses an electrical modulation proportion direction valve sets up the double step throttling groove that is double step trapezoid on main valve element and the pilot valve case respectively for the logical oil area seal chamber that forms when case and corresponding valve body cooperate has certain variability, and the control leads to the oil mass more accurate, can realize mechanical part's accurate response position change, reaches valve proportional control and is linear steady attitude, greatly improves product quality stability.
2. The utility model discloses an electrical modulation proportion direction valve, the seal groove that is used for settling sealing washer department of the main valve body is middle arch, peripheral low concave dysmorphism groove, thereby prevents that the sealing washer from rolling the emergence that leads to the oil impregnate problem to the hole of the main valve body after receiving the compression, effectively improves sealing performance, does benefit to environmental protection.
The present invention will be described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a front view of the electric modulation proportional directional valve of the present invention;
fig. 2 is a top view of the electric modulation proportional directional valve of the present invention;
fig. 3 is a perspective view of the pilot valve cartridge of the present invention;
FIG. 4 is a front view of the pilot poppet of FIG. 1;
FIG. 5 is an enlarged view of portion A of FIGS. 1 and 4;
FIG. 6 is a perspective view of the main valve element of the present invention;
FIG. 7 is an enlarged view of portion B of FIG. 1;
fig. 8 is an enlarged view of a portion C of fig. 1.
Detailed Description
As shown in fig. 1 and fig. 2, the front view and the top view of the electric modulation proportional directional valve of the present invention are shown respectively, and it can be seen from the drawings that the electric modulation proportional directional valve of the present invention includes: a pilot valve body 18, a pilot spool 20 mounted on the pilot valve body 18, a main valve body 7, a main spool 9 mounted on the main valve body 7, a pair of valve caps 1, 2, and a packing 10, and further includes other components such as an amplifier 16 mounted on a valve cap 13, a displacement sensor in contact with one end of the main spool 9, a superimposed value reducing valve 19 mounted on the pilot valve body 18, and the like. Wherein, the main valve core 9 and the pilot valve core 20 are respectively provided with a throttling groove, the throttling groove on the main valve core 9 is a main valve double-step throttling groove in a double-step shape, and the throttling groove on the pilot valve core is a pilot valve double-step throttling groove in a double-step shape.
Specifically, as shown in fig. 1, 6 and 7, the dual-step throttling groove of the main valve of the present invention comprises: a first trapezoidal groove 92 which is opened on the outer wall of the main valve element 9 and extends in a trapezoidal shape along the axial direction of the main valve element 9; a second trapezoidal groove 91 opened on the outer wall of the main valve body 9 and forming a step shape with the first trapezoidal groove 92. The second trapezoidal groove 92 is a straight groove vertically opened on the main spool 9 in the radial direction of the main spool 9, and is adjacent to the small end of the first trapezoidal groove 91. During machining, the second trapezoidal groove 92 may be formed by slightly milling toward the center in the radial direction of the main valve core near the small end of the first trapezoidal groove 91.
In design, one or more first diameter sections 9a and one or more second diameter sections 9b are machined on at least main spool 9 as needed, wherein the diameter of the first diameter section is larger than that of the second diameter section (as shown in fig. 6, four first diameter sections with the same diameter and four second diameter sections with the same diameter are machined on main spool 9, the first diameter sections and the second diameter sections are arranged at intervals, and a third diameter section 9c adjacent to the first diameter section is also machined at one end of main spool 9, and the diameter of the third diameter section is between the diameters of the first diameter section and the second diameter section).
The main valve dual-step throttling groove is provided at one or more first diameter sections of the main valve spool 9, and may be provided at one end or both ends of the first diameter section (fig. 6 shows that the main valve dual-step throttling groove is provided at both ends of one first diameter section, respectively).
The large end of the first trapezoidal groove 92 of the main valve double step throttling groove is located at the adjacent position of the first diameter section and the adjacent second diameter section of the main valve spool 9, and the depth of the first trapezoidal groove 92 is larger than the depth of the second trapezoidal groove 91 (the depth refers to the size extending from the outer wall of the main valve spool 9 to the central direction), but the depth of the first trapezoidal groove 92 is smaller than the difference of the radiuses of the first diameter section and the second diameter section.
Preferably, the first trapezoidal groove 92 may have a trapezoidal shape, and may also have a combined trapezoidal and rectangular shape (as shown at 94 in fig. 6).
Because the first trapezoidal groove 92 and the second trapezoidal groove 92 on the main valve element 9 form a double-step groove (the double-step groove is a groove with two steps), the area change of the oil through cavity formed when the main valve element 9 is matched with the main valve body 7 along the axial direction of the main valve element is more accurate, the oil through change is more accurate, and the linear stability of valve proportion control is improved.
Wherein, the utility model discloses also set up on pilot valve core 20 and be trapezoidal pilot valve throttle groove of two steps, as shown in fig. 1, fig. 3-fig. 5, this pilot valve throttle groove includes: a frustum groove 202 which is arranged on the outer wall of the pilot valve core 20 and extends in a conical manner along the radial direction of the main valve core 9; an arc-shaped groove 201 is opened on the outer wall of the pilot valve core 20 and forms a step shape with the frustum groove 202.
Specifically, during processing, one or more first diameter sections and one or more second diameter sections are processed on the pilot valve core as required, the diameter of the first diameter section is larger than that of the second diameter section, and the first diameter section and the second diameter section are arranged at intervals along the pilot valve core.
An arc-shaped groove 201 and a frustum groove 202 are arranged on one or more first diameter sections of the pilot valve core 20, and the arc-shaped groove 201 and the frustum groove 202 form a step shape. When the arc-shaped groove 201 and the frustum groove 202 are arranged, the number of the arc-shaped groove and the frustum groove can be one or more, and if the number of the frustum grooves is more than one, the arc-shaped groove and the frustum groove can be uniformly distributed along the circumferential direction of the pilot valve core.
Wherein the frustum groove 202 may be located entirely on the first diameter section, or alternatively, the frustum groove may be located partially on the first diameter section and partially on a second diameter section adjacent to the first diameter section (such as frustum groove 203 shown in fig. 3).
In addition, the number of pilot valve throttling grooves may be determined according to the need during design, for example, the pilot valve throttling grooves may be provided at one end of the first diameter section of the pilot valve core 20, or the pilot valve throttling grooves may be provided at both ends of the first diameter section (as shown in fig. 3).
The arc-shaped groove 201 is a straight groove vertically opened on the pilot valve core 20 along the radial direction of the pilot valve core 20, and the frustum groove 202 is formed by milling downwards along the radial direction of the pilot valve core 20. Regardless of the section of pilot spool on which cone groove 202 is formed, the depth of cone groove 202 in the first diameter section is greater than the depth of arc groove 201 (depth is the dimension extending from the outer wall of the first diameter section of pilot spool 20 to the center). Particularly, the arc-shaped groove 201 is a straight groove, so that the processing is convenient, the length dimension of the throttling groove along the axial direction is easier to control, and the processing consistency is good.
The utility model discloses an adopt the double-step throttling groove that is formed by frustum groove and arc groove on the pilot valve case for the logical oil area that forms when pilot valve case and pilot valve body cooperate has certain change, thereby control leads to the oil mass more accurate, combine the double-step throttling groove on the main valve core, make whole electrical modulation proportion direction valve at the electrical modulation in-process, can realize mechanical part's accurate response position change, it is linear steady attitude to reach valve proportional control, greatly improve product quality stability.
In addition, the utility model discloses still set up the seal groove (like seal groove 71) that is used for settling the sealing washer on the main valve body 7 to middle arch, peripheral low concave dysmorphism groove. As shown in fig. 8, the seal groove 71 is a seal groove for seating the seal ring 10, and has a central protrusion and a peripheral depression, wherein the central protrusion is a protrusion formed by protruding outward in the radial direction of the main spool 9, and the other part of the seal groove is depressed with respect to the protrusion. Through setting each seal groove to the dysmorphism groove of middle arch, peripheral low recess, can prevent to settle the sealing washer in it when, thereby the sealing washer can roll to the hole of valve body after the compression and lead to the emergence of oil leakage problem, effectively improves sealing performance, does benefit to environmental protection.
Although the present invention has been described in detail, the present invention is not limited thereto, and those skilled in the art can modify the principle of the present invention, and therefore, various modifications performed according to the principle of the present invention should be understood as falling into the protection scope of the present invention.
Claims (10)
1. An electrically modulated proportional direction valve comprising: the pilot valve body, install the pilot valve core on the pilot valve body, the main valve body, install main valve core, a pair of valve gap and the sealing washer on the main valve body, set up throttle groove, its characterized in that on main valve core and the pilot valve core respectively:
the throttling groove on the main valve core is a main valve double-step throttling groove in a double-step shape;
the throttling groove on the pilot valve core is a double-step-shaped pilot valve double-step throttling groove.
2. The electrically modulated proportional directional valve of claim 1, wherein the main valve dual-step throttling channel comprises:
the first trapezoid groove is formed in the outer wall of the main valve core and extends in a trapezoid shape along the axial direction of the main valve core;
and the second trapezoid groove is formed in the outer wall of the main valve core and forms a step with the first trapezoid groove.
3. The electrically modulated proportional direction valve of claim 2, wherein the second dovetail groove is adjacent to a small end of the first dovetail groove and is a straight groove that opens perpendicularly to the main spool in a radial direction of the main spool.
4. The electrically modulated proportional direction valve of claim 3, wherein the large end of the first dovetail groove is located adjacent to a first diameter section of the main spool having a larger diameter than a second diameter section.
5. The electrically modulated proportional direction valve of claim 4, wherein a depth of the first trapezoidal groove is greater than a depth of the second trapezoidal groove, the depth being a dimension extending from an outer wall of the main spool toward a center direction.
6. The electrically modulated proportional directional valve of claim 1, wherein the pilot valve dual-step throttling channel comprises:
the frustum groove is arranged on the outer wall of the pilot valve core and extends in a conical shape along the radial direction of the main valve core;
the pilot valve core is arranged on the outer wall of the pilot valve core and forms a step-shaped arc-shaped groove with the frustum groove.
7. The electrically modulated proportional directional valve of claim 6, wherein the arcuate slot is located on a first diameter section of the pilot poppet, the frustum slot is located on a second diameter section and/or a first diameter section of the pilot poppet, the first diameter section having a larger diameter than the second diameter section.
8. The electrically modulated proportional directional valve of claim 7, wherein a depth of the cone groove on the first diameter section is greater than a depth of the arc groove, and the depth is a dimension extending from an outer wall of the first diameter section of the pilot valve core to a center direction.
9. The electrically modulated proportional directional valve of claim 1, wherein the pilot valve dual-step throttling channel comprises:
the long circular groove is formed in the outer wall of the pilot valve core and extends along the axial direction of the main valve core;
the pilot valve core is arranged on the outer wall of the pilot valve core and forms a stepped arc-shaped groove with the long circular groove.
10. The electrical modulation proportional direction valve of any of claims 1-9, wherein the sealing groove of the main valve body for seating the sealing ring is a shaped groove with a convex middle part and a concave periphery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020621704.1U CN212079796U (en) | 2020-04-23 | 2020-04-23 | Electric modulation proportional direction valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020621704.1U CN212079796U (en) | 2020-04-23 | 2020-04-23 | Electric modulation proportional direction valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212079796U true CN212079796U (en) | 2020-12-04 |
Family
ID=73595971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020621704.1U Active CN212079796U (en) | 2020-04-23 | 2020-04-23 | Electric modulation proportional direction valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212079796U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446416A (en) * | 2021-02-18 | 2021-09-28 | 涌镇液压机械（上海）有限公司 | Reversing valve capable of improving load action stability |
-
2020
- 2020-04-23 CN CN202020621704.1U patent/CN212079796U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446416A (en) * | 2021-02-18 | 2021-09-28 | 涌镇液压机械（上海）有限公司 | Reversing valve capable of improving load action stability |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6799746B2 (en) | Electromagnet, in particular a proportional magnet for operating a hydraulic valve | |
| CN212079796U (en) | Electric modulation proportional direction valve | |
| CN103470815B (en) | Equilibrium valve | |
| US20190024806A1 (en) | Spool valve | |
| US4926906A (en) | Spool valve | |
| EP0158457A2 (en) | Pressure-activated seal ring | |
| US10167881B2 (en) | Valve components | |
| US20120261598A1 (en) | Directly piloted valve assembly | |
| KR101536587B1 (en) | Metal seal | |
| US4285366A (en) | Pressure medium control system for auxiliary power steering systems | |
| CA2122501C (en) | Balanced, steam control valve assembly, and a plug-type valving element therefor | |
| US4572551A (en) | Fluid connector | |
| EP0005151B1 (en) | Hydraulic system including a margin valve | |
| US5857479A (en) | Precontrolled three-way pressure reduction valve | |
| JPH0362921B2 (en) | ||
| CN210218716U (en) | Flow regulating valve | |
| CN2839690Y (en) | Superimposed relief valve | |
| JP3464830B2 (en) | Control valve | |
| JPH0218251Y2 (en) | ||
| US3596871A (en) | Tracing valve | |
| CN217950845U (en) | Reversing valve | |
| CN210565416U (en) | Pressure compensation valve core and pressure compensation valve with same | |
| CN212028216U (en) | Hydraulic control valve and variable displacement hydraulic pump with same | |
| CN212657082U (en) | Reversing valve | |
| CN112178252B (en) | Relief pressure valve unloading structure and relief pressure valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |