CN217519209U - Sealing element for cartridge valve - Google Patents

Abstract

The utility model discloses a sealing element for a cartridge valve, which comprises an integrally formed annular sealing element body; a D-shaped sealing surface is arranged on the radial outer side surface of the sealing element body; two sides of the D-shaped sealing surface are provided with sealing shoulders; the sealing shoulder is step-shaped; the axial side surfaces of the sealing element body are provided with a plurality of salient points at equal intervals; the utility model discloses the design of D type sealing surface "D" type for the sealing member body keeps sufficient compression capacity, forms effective seal, and the design of D type sealing surface "D" shape symmetry is two effect sealing members, can seal the medium of left and right sides, can bear the medium pressure of equal both sides, and the height H of sealed shoulder is less than the height H of medium slot, effectively avoids sealed extruding from case and valve body fit clearance and damaged inefficacy when receiving high medium pressure; the utility model discloses the sealing member life-span prolongs greatly, reduces and changes required economic cost of sealing member and time cost.

Description

Sealing element for cartridge valve

Technical Field

The utility model relates to a sealed technical field, especially a sealing member for cartridge valve.

Background

The hydraulic valve is used as a hydraulic element widely used in the field of hydraulic transmission and is used for controlling the pressure, the flow and the direction of liquid. The cartridge valve is a common structural form of a hydraulic valve, and is characterized by compact structure, high economy and easy design of almost all hydraulic circuits. Compared with a traditional plate type hydraulic valve or a tubular type hydraulic valve, the hydraulic control valve has the advantages of fewer used pipelines, fewer leakage points and lower failure rate. The method is widely applied to the fields of engineering machinery, industrial machinery and the like. Referring to fig. 5 and 6, the sealing member of the cartridge valve is conventionally designed as an O-ring and a retainer ring, wherein the O-ring is made of Nitrile Butadiene Rubber (NBR) and the retainer ring is made of Polytetrafluoroethylene (PTFE). The defects of short service life, low pressure bearing capacity and the like exist in the using process, and the sealing element needs to be frequently replaced. Although the value of the seal is low, maintenance and replacement can result in significant collateral costs such as disassembly of the valve block and downtime.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sealing member for cartridge valve for solve the short-lived problem of cartridge valve sealing member, the utility model discloses a sealing member life-span is prolonged greatly and is improved the bearing capacity of sealing member, reduces and changes required economic cost of sealing member and time cost.

The utility model discloses a following technical scheme realizes:

a seal for a cartridge valve includes an integrally formed annular seal body; wherein: a D-shaped sealing surface is arranged on the radial outer side surface of the sealing element body; two sides of the D-shaped sealing surface are provided with sealing shoulders; the sealing shoulder is stepped.

Furthermore, the axial side surfaces of the sealing element body are provided with a plurality of salient points which are equally spaced.

Further, the height H of the sealing shoulder is smaller than the height H of the medium groove.

Further, the sealing element body is arranged in a left-right symmetrical mode.

Further, the sealing element body is made of polyurethane materials and is molded through one-step molding through a high-precision mold.

The utility model has the advantages that:

1. the utility model discloses a set up the sealed face of D type, the sealed design of personally submitting "D" type of D type for the sealing member body keeps sufficient compressive capacity, forms effective seal, and the sealed symmetrical design of personally submitting "D" type of D type, for two effect sealing members, the medium that can seal the left and right sides can bear the medium pressure of equal both sides.

2. The utility model discloses a set up the bump, the effect that the bump played pressure release and buffering when the sealing member body received the pressure switch of the higher frequency of the left and right sides, this realization of sealing member at the ditch inslot small amplitude side-to-side motion, the bump design can make the sealed side of low pressure end can release pressure rapidly.

3. The utility model discloses a high H of sealed shoulder is less than the high H of medium slot, effectively avoids sealed extruding and impaired inefficacy from case and valve body fit clearance when receiving high medium pressure.

4. The sealing element body is designed in an integrated manner, so that the installation is easier, the sealing element body is designed in a symmetrical manner, the left part and the right part are not required during installation, the installation is simpler, and the working efficiency is further improved; the sealing member body adopts the polyurethane material to once mould pressing time shaping through high accuracy mould, adopts outstanding material, and the sealing member life-span prolongs greatly, reduces the required economic cost of change sealing member and time cost.

Drawings

Fig. 1 is a schematic perspective sectional structure view of a sealing member body according to an embodiment of the present invention;

FIG. 2 is a schematic view of a seal body and a cartridge valve of an embodiment of the present invention prior to assembly;

FIG. 3 is a schematic structural view of the sealing member body and the cartridge valve according to the embodiment of the present invention after assembly;

FIG. 4 is an enlarged schematic view of section A of FIG. 3;

FIG. 5 is a schematic illustration of a prior art assembled seal body and cartridge valve;

fig. 6 is an enlarged schematic view of a portion B of fig. 5.

In the above figures, 1-seal body; a 2-D type sealing surface; 3-sealing the shoulder; 4-salient points; 5-cartridge valve.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, and the present invention will be described in detail with reference to the accompanying drawings and specific embodiments below according to the present invention.

It should be noted that all directional indicators (such as upper, lower, left, right, front, back, upper end, lower end, top, bottom … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the term "coupled" is to be construed broadly, e.g., "coupled" may be a fixed connection or a releasable connection, or may be integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature; in addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

With reference to fig. 1 to 4, the present invention discloses a sealing member for a cartridge valve, which comprises an integrally formed annular sealing member body 1; the sealing element body 1 is arranged on the cartridge valve 5; wherein: a D-shaped sealing surface 2 is arranged on the radial outer side surface of the sealing element body 1; two sides of the D-shaped sealing surface 2 are provided with sealing shoulders 3; the sealing shoulder 3 is stepped. It should be noted that the D-shaped sealing surface 2 is designed in a "D" shape, so that the sealing element body 1 maintains an inflated compression amount to form effective sealing, and the D-shaped sealing surface 2 is designed in a "D" shape symmetrically, is a double-acting sealing element, can seal media on the left and right sides, and can bear the pressure of the media on the same two sides;

specifically, in the embodiment, the axial side surfaces of the sealing element body 1 are provided with a plurality of salient points 4 with equal intervals, and the salient points 4 play a role in pressure relief and buffering. When the sealing element body 1 is subjected to pressure switching of high frequency at the left side and the right side, the sealing element body 1 can move left and right in the groove in a small amplitude, and the bump 4 is designed to enable the sealing side of the low-pressure end to be rapidly decompressed.

Specifically, in the scheme of the present embodiment, the height H of the sealing shoulder 3 is smaller than the height H of the medium groove, so that damage and failure caused by extrusion from a fit clearance between the valve core and the valve body when the seal is subjected to high medium pressure are effectively avoided. The contact area of the seal lip and the hole sealing surface is small, the friction between the seal and the hole is reduced, and excellent sealing performance is provided.

Specifically, in the embodiment, the sealing element body 1 is arranged in a left-right symmetrical manner. It should be noted that, the sealing element body 1 is designed in an integrated manner, so that the installation is easier, the sealing element body 1 is designed in a symmetrical manner, so that the installation is simpler and the working efficiency is further improved.

Specifically, in the scheme of the embodiment, the sealing element body 1 is made of a polyurethane material through one-step compression molding by a high-precision mold, the polyurethane material is TPU-PPDI-U9300, and an excellent material is adopted, so that the service life of the sealing element is greatly prolonged, and the economic cost and the time cost required for replacing the sealing element are reduced.

The utility model discloses a life-span test that the sealing member goes on according to following test condition through some domestic famous cartridge valve manufacturer smoothly:

medium: 46# Hydraulic oil

Temperature: at a temperature of 25 c,

pressure: 28MPA

120 ten thousand pressure pulse tests.

The utility model discloses sealing material physical properties table:

the technical solutions provided by the embodiments of the present invention are introduced in detail, and the principles and embodiments of the present invention are explained by using specific examples, and the explanations of the above embodiments are only applicable to help understanding the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there may be variations in the specific implementation manners and application ranges, and in summary, the contents of the present specification should not be construed as limitations of the present invention.

Claims (5)

1. A seal for a cartridge valve includes an integrally formed annular seal body; the method is characterized in that: a D-shaped sealing surface is arranged on the radial outer side surface of the sealing element body; two sides of the D-shaped sealing surface are provided with sealing shoulders; the sealing shoulder is stepped.

2. A seal for a cartridge valve according to claim 1, wherein: the axial side of the sealing element body is provided with a plurality of salient points which are equally spaced.

3. A seal for a cartridge valve according to claim 2, wherein: the height H of the sealing shoulder is less than the height H of the medium groove.

4. A seal for a cartridge valve according to claim 1, wherein: the sealing element body is arranged in a bilateral symmetry mode.

5. A seal for a cartridge valve according to claim 1, wherein: the sealing element body is made of polyurethane materials and is molded through one-step compression molding through a high-precision mold.

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