CN208457200U - A kind of piston rod seal component - Google Patents

Abstract

The utility model discloses a kind of piston rod seal components.The piston rod seal component includes main body, O-ring and retaining ring, the body top is equipped with U-shaped oil groove, the oil groove side is equipped with the first sealing lip, the oil groove other side is equipped with the second sealing lip, the bottom part body is equipped with stepped notch, and the O-ring is set in the U-shaped oil groove, and the section of the retaining ring is stepped, the retaining ring is arranged in the notch, matches with the notch interference.Piston rod seal component favorable sealing property described in the utility model, and there is good crush resistance, suitable for harsh operating condition.

Description

A kind of piston rod seal component

Technical field

The utility model relates to sealing element technical fields, and in particular to a kind of piston rod seal component.

Background technique

In hydraulic system, sealing element is used to prevent the leakage of working media and prevents extraneous dust and foreign matter intrusion hydraulic In system.Hydraulic system leakage will cause waste, pollution machine and the environment of working media, or even can cause mechanically actuated failure And equipment, personal injury；Interior leakage can cause hydraulic system volumetric efficiency sharply to decline, and required operating pressure be not achieved, very To not can be carried out work；And the invasion of extraneous dust, dirty, foreign matter etc., then it may cause or aggravate Hydraulic Elements friction pair Abrasion, further result in leakage.Therefore, the leakproofness of sealing element is improved, crush resistance is that those skilled in the art urgently solve Certainly the problem of.

Utility model content

The utility model provides a kind of piston rod seal component, with to solve the above technical problems.

In order to solve the above-mentioned technical problem, the technical solution of the utility model is: a kind of piston rod seal component, including master Body, O-ring and retaining ring, the body top are equipped with U-shaped oil groove, and the oil groove side is equipped with the first sealing lip, and the oil groove is another Side is equipped with the second sealing lip, and the bottom part body is equipped with stepped notch, and the O-ring is set in the U-shaped oil groove, institute The section for stating retaining ring is stepped, and the retaining ring is arranged in the notch, matches with the notch interference.

Further, the inlet of the U-shaped oil groove is equipped with chamfering.

Further, the stepped notch and the ladder-like retaining ring are equipped with fillet at dog-ear respectively.

Further, the main body uses polyurethane material.

Further, the O-ring is made of elastic material.

Further, the O-ring uses nitrile rubber material.

Piston rod seal component described in the utility model can carry out certain benefit to the abrasion of sealing lip by being equipped with O-ring It repays, extends the service life of sealing element, the pretightning force that O-ring provides is but also sealing element has under conditions of no-load and low temperature Ideal sealing function；Ladder-like retaining ring improves the enabling capabilities to main body, improves the crush resistance of entire sealing element, is applicable in In harsh operating condition.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of one specific embodiment of piston rod seals described in the utility model；

Fig. 2 is the use schematic diagram of piston rod seals described in the utility model.

It is as shown in the figure: 100- main body, 110- oil groove, the first sealing lip of 120-, the second sealing lip of 130-, 140- notch, 200-O type circle, 300- retaining ring, 400- cylinder body, 410- groove, 500- piston rod.

Specific embodiment

In order to make it easy to understand, illustrating the technical characteristics of the utility model below with reference to embodiment.It should be understood that these embodiments It is merely to illustrate the utility model rather than limitation the scope of the utility model.

As shown in Figure 1, piston rod seal component described in the utility model includes main body 100, O-ring 200 and retaining ring 300.Its In, the main body 100 includes the U-shaped oil groove 110 for being located at body top, the first sealing lip 120, the oil groove 110 of 110 side of oil groove Second sealing lip 130 of the other side, and the notch 140 positioned at 100 bottom of main body, the notch 140 is in step type.The O Type circle 200 is set in the U-shaped oil groove 110, the two interference fit.The section of the retaining ring 300 is stepped, and described The shape of stepped notch 140 matches, and the retaining ring 300 is interference fitted with the notch 140.The retaining ring 300 and main body 100 by the way of cascaded surface cooperation, increase the contact area of the two, improve retaining ring 300 to the support energy of main body 100 Power, to improve the anti-plasticating capacity of the entire piston rod seal component.

Further, as shown in Figure 1, the inlet of the U-shaped oil groove 110 is equipped with chamfering, convenient for installing O-ring 200 Enter in oil groove 110.

Further, as shown in Figure 1, at the dog-ear of the step type notch 140, the dog-ear of the ladder-like retaining ring 300 Place is respectively equipped with fillet, and stress is concentrated when notch 140 and retaining ring 300 being avoided to be interference fitted, and effectively reduces main body 100 and retaining ring 300 fatigue loss extends the service life of the piston rod seal component.

Further, the main body 100 uses polyurethane material, has good wearability and resilience.

Further, the O-ring 200 is made of elastic material, and specifically, the O-ring 200 uses butyronitrile glue material Matter has good resilience.O-ring 200 is mounted in oil groove 110, has a pre compressed magnitude, when two sealing lips occur When abrasion, sealing lip can be compensated, it is ensured that the leakproofness of the piston rod seal component prolongs the service life.

Following emphasis illustrates the working principle of piston rod seal component described in the utility model referring to Fig. 2: the piston rod is close Sealing is mounted in the groove 410 of cylinder body 400, bottom, the second sealing lip 130 and the piston of the first sealing lip 120 and groove 410 Bar 500 is interference fitted respectively；O-ring 200 ensure that pre compressed magnitude of two sealing lips under the conditions of low pressure or vacuum, and right The abrasion of sealing lip carries out certain compensation, improves sealing performance, meanwhile, sealing lip due to system pressure increase and pass through The O-ring 200 of compressive deformation is transferred in seal lip, thus make sealing lip tightly embrace piston rod 500 play it is excellent close Seal effect；300 supportive body 100 of retaining ring, avoids main body 100 from being extruded to cylinder body 400 and piston under the action of system pressure In gap between bar 500.

Piston rod seal component described in the utility model can carry out the abrasion of sealing lip certain by being equipped with O-ring 200 Compensation, extend the service life of sealing element, the pretightning force that O-ring 200 provides but also sealing element no-load and low temperature item There is ideal sealing function under part；Ladder-like retaining ring 300 improves the enabling capabilities to main body 100, improves entire sealing element Crush resistance, suitable for harsh operating condition.

Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations. Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: It can still modify to technical solution documented by previous embodiment, or to some or all of the technical features It is equivalently replaced, and these modifications or substitutions, various embodiments of the utility model that it does not separate the essence of the corresponding technical solution The range of technical solution.

Claims (5)

1. a kind of piston rod seal component, which is characterized in that including main body, O-ring and retaining ring, the body top is equipped with U-shaped oil Slot, the oil groove side are equipped with the first sealing lip, and the oil groove other side is equipped with the second sealing lip, and the bottom part body is equipped with rank Ladder type notch, the O-ring are set in the U-shaped oil groove, and the section of the retaining ring is stepped, and the retaining ring is arranged in institute It states in notch, is matched with the notch interference, the step type notch and the ladder-like retaining ring are equipped with circle at dog-ear respectively Angle.

2. piston rod seal component according to claim 1, which is characterized in that the inlet of the U-shaped oil groove is equipped with chamfering.

3. piston rod seal component according to claim 1, which is characterized in that the main body uses polyurethane material.

4. piston rod seal component according to claim 1, which is characterized in that the O-ring is made of elastic material.

5. piston rod seal component according to claim 4, which is characterized in that the O-ring uses nitrile rubber material.