CN209875605U - Piston combined sealing element - Google Patents

Abstract

The utility model discloses a piston combination sealing member, which comprises a piston, piston top fixed surface is connected with the inner seal piece, No. two sealing necks are installed at the inner seal piece top, No. two sealing neck top activities are equipped with the outer seal piece, outer seal piece bottom fixed surface is connected with the sealing washer, the seal groove has been seted up on No. two sealing neck top surfaces. The utility model discloses a sealed neck inner chamber top one side has been seted up the oil trap, the lubricating oil that can be to the piston rod lateral wall of oil trap is collected, avoid the piston rod to make a round trip to stretch out and draw back the outside of taking the lubricating grease to a sealed neck, influence the cleanness on surface like this, lubricating oil is made and is leaded to the dust adhesion in the outside easily, the piston rod makes a round trip to stretch out and draw back like this and can take the dust to the cylinder inboard, influence the smooth and easy effect that the piston rod made a round trip to stretch out and draw back like this, the dust guard is installed to top one side of oil trap, the.

Description

Piston combined sealing element

Technical Field

The utility model relates to a sealing member, in particular to piston combination sealing member.

Background

The sealing element is a material or a part for preventing fluid or solid particles from leaking from adjacent joint surfaces and preventing external impurities such as dust and moisture from invading parts in machine equipment, although the sealing element is small, the sealing element has the function of becoming a basic part and a fitting in the main industry of national economy such as national defense, chemical industry, petroleum, coal, transportation and mechanical manufacturing and plays a very important role in the development of national economy.

But the sealing member that is used for the piston at cylinder inner chamber top all is the integral type to be fixed at cylinder inner chamber top, and single sealed effect is not good like this, and the piston rod makes a round trip to stretch out and draw back in addition can bring lubricating oil to the sealing member in the outside on, can influence the cleanness on surface like this, and the lubrication has easy adhesion dust moreover. To this end, we propose a piston combination seal.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a piston combination sealing member, the oil trap has been seted up to sealed neck inner chamber top one side, the lubricating oil that can the piston rod lateral wall of oil trap is collected, take the lubricating oil to the outside of a sealed neck when avoiding the piston rod to make a round trip to stretch out and draw back, influence the cleanness on surface like this, and lubricating oil is made and is leaded to the dust adhesion in the outside easily, the piston rod makes a round trip to stretch out and draw back like this and can take the dust to the cylinder inboard, influence the smooth and easy effect that the piston rod made a round trip to stretch out and draw back like this, the dust guard is installed to top one side of oil trap, the dust is avoided the dust to fall the oil.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a piston combination sealing member, includes the piston, piston top fixed surface is connected with inner seal, No. two sealing necks are installed at the inner seal top, No. two sealing neck top activities are equipped with outer seal, outer seal bottom fixed surface is connected with the sealing washer, No. two sealing neck top surfaces have seted up the seal groove, and the sealing washer is located the seal groove inner chamber, outer seal top fixed surface is connected with a sealing neck, the oil trap has been seted up at a sealing neck top.

Further, the outer sealing element and the outer side wall of the first sealing neck are fixedly connected with metal fastening rings.

Furthermore, a dust guard is installed on one side of the top of the oil collecting tank.

Further, a piston rod is installed at the top of the inner cavity of the inner sealing element, and the piston rod penetrates through the first sealing neck and the second sealing neck.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. when the piston rod drives the piston to move up and down, the sealing groove is matched with the sealing ring when the inner sealing element moves up, so that the inner sealing element and the outer sealing element are combined together to perform combined sealing of combining the outer side and the inner side into a whole, and the double-combined sealing of the inner side and the outer side improves the sealing effect.

2. An oil trap has been seted up to sealed neck inner chamber top one side, the lubricating oil that can be to the piston rod lateral wall of oil trap is collected, avoid the piston rod to make a round trip to stretch out and draw back the outside of taking the lubricated sealed neck No. one, influence the cleanness on surface like this, lubricating oil makes in addition leads to the dust adhesion in the outside easily, the piston rod makes a round trip to stretch out and draw back like this and can take the dust to the cylinder inboard, influence the smooth and easy effect that the piston rod made a round trip to stretch out and draw back like this, the dust guard is installed to top one side of oil trap, the dust.

3. The metal fastening ring is installed to the lateral wall of outer sealing member and the lateral wall of a sealed neck, and the metal fastening ring is inseparable with the lateral wall parcel of outer sealing member and a sealed neck, avoids outer sealing member and a sealed neck to receive extrusion deformation, avoids influencing the leakproofness.

Drawings

Fig. 1 is a schematic view of the overall structure of the piston combined sealing member of the present invention.

Fig. 2 is a schematic structural view of an inner sealing member of the piston combined sealing member of the present invention.

Fig. 3 is a schematic structural view of an outer seal of a piston composite seal of the present invention.

In the figure: 1. a piston; 2. an inner seal; 3. an outer seal; 4. a seal ring; 5. a sealing groove; 6. an oil sump; 7. a metal fastening ring; 8. a first sealing neck; 9. a piston rod; 10. a second sealing neck; 11. a dust guard.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

As shown in fig. 1-3, a piston combination sealing member, including piston 1, 1 top fixed surface of piston is connected with inner seal 2, No. two sealing neck 10 are installed at 2 tops of inner seal, No. two sealing neck 10 top activities are equipped with outer seal 3, 3 bottom fixed surface of outer seal are connected with sealing washer 4, No. two sealing neck 10 top surfaces have been seted up seal groove 5, and sealing washer 4 is located the 5 inner chambers of seal groove, 3 top fixed surface of outer seal are connected with sealing neck 8 No. one, oil trap 6 has been seted up at sealing neck 8 top.

In this embodiment, as shown in fig. 1, 2 and 3, when the piston rod 9 drives the piston to move up and down, the sealing groove 5 is matched with the sealing ring 4 when the inner sealing element 2 moves up, so that the inner sealing element 2 and the outer sealing element 3 are combined together to perform combined sealing of combining the outer side and the inner side, and thus the double-combined sealing of the inner side and the outer side improves the sealing effect.

And the outer side walls of the outer sealing element 3 and the first sealing neck 8 are fixedly connected with a metal fastening ring 7.

In this embodiment, as shown in fig. 1 and 3, the metal fastening ring 7 tightly wraps the outer sealing element 3 and the outer side wall of the first sealing neck 8, so that the outer sealing element 3 and the first sealing neck 8 are prevented from being extruded and deformed, and the sealing performance is prevented from being affected.

Wherein, a dust guard 11 is installed on one side of the top of the oil collecting groove 6.

In the embodiment, as shown in fig. 1, the dust-proof plate 11 prevents dust from falling into the inner cavity of the oil-collecting tank 6.

Wherein, a piston rod 9 is installed at the top of the inner cavity of the inner sealing element 2, and the piston rod 9 penetrates through the first sealing neck 8 and the second sealing neck 10.

In the embodiment, as shown in fig. 1, a first sealing neck 8 and a second sealing neck 10 are arranged on the outer side wall of the piston rod 9 to seal the first sealing neck and the second sealing neck.

It should be noted that, the utility model relates to a piston combined seal, the piston 1, the inner seal 2, the outer seal 3, the seal ring 4, the seal groove 5, the oil trap 6, the metal fastening ring 7, the first seal neck 8, the piston rod 9, the second seal neck 10, the dust guard 11, the components are all the common standard components or the components known by the technicians in this field, the structure and the principle are all known by the technicians through technical manuals or through routine experimental methods, in operation, the top surface of the piston 1 is fixedly connected with the inner seal 2, and the inner seal 2 is located at the top of the cylinder cavity, the top of the inner seal 2 is movably provided with the outer seal 3, and the outer seal 3 is located at the top of the cylinder, the top of the inner seal 2 is provided with the second seal neck 10, the top surface of the second seal neck 10 is provided with the seal groove 5, and the bottom surface of the outer seal 3 is fixedly connected with the seal groove 4, therefore, when the piston rod 9 drives the piston to move up and down, the sealing groove 5 is matched with the sealing ring 4 when the inner sealing element 2 moves up, so that the inner sealing element 2 and the outer sealing element 3 are combined together to carry out combined sealing of combining the outer side and the inner side, and the sealing effect is improved by double combined sealing of the inner side and the outer side; an oil collecting groove 6 is formed in one side of the top of the inner cavity of the first sealing neck, lubricating oil on the outer side wall of the piston rod 9 can be collected by the oil collecting groove 6, the situation that the lubricating oil is brought to the outer side of the first sealing neck 8 when the piston rod 9 stretches back and forth is avoided, the surface cleaning is influenced, dust is easily adhered to the outer side due to the fact that the lubricating oil is made to adhere to the outer side, dust is brought to the inner side of the cylinder due to the fact that the piston rod 9 stretches back and forth, the smooth effect of the back and forth stretching of the piston rod is influenced, a dust guard plate 11 is installed on one; the lateral wall of external seal member 3 and a sealing neck 8 installs metal retainer ring 7, and metal retainer ring 7 is inseparable with external seal member 3 and a sealing neck 8's lateral wall parcel, avoids external seal member 3 and a sealing neck 8 to receive extrusion deformation, avoids influencing the leakproofness.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (4)

1. A piston combination seal, comprising a piston (1), characterized in that: piston (1) top fixed surface is connected with inner seal (2), No. two sealing neck (10) are installed at inner seal (2) top, No. two sealing neck (10) top activities are equipped with outer sealing member (3), outer sealing member (3) bottom fixed surface is connected with sealing washer (4), seal groove (5) have been seted up on No. two sealing neck (10) top surfaces, and sealing washer (4) are located seal groove (5) inner chamber, outer sealing member (3) top fixed surface is connected with sealing neck (8) No. one, oil trap (6) have been seted up at sealing neck (8) top.

2. A piston composite seal according to claim 1, wherein: the outer side walls of the outer sealing piece (3) and the first sealing neck (8) are fixedly connected with metal fastening rings (7).

3. A piston composite seal according to claim 1, wherein: and a dust guard (11) is arranged on one side of the top of the oil collecting tank (6).

4. A piston composite seal according to claim 1, wherein: a piston rod (9) is installed at the top of the inner cavity of the inner sealing element (2), and the piston rod (9) penetrates through a first sealing neck (8) and a second sealing neck (10).