CN213332354U

CN213332354U - Piston seal ring

Info

Publication number: CN213332354U
Application number: CN202022248411.6U
Authority: CN
Inventors: 叶水生
Original assignee: Foshan Yuanshi Hydraulic Seals Science And Technology Co ltd
Current assignee: Foshan Yuanshi Hydraulic Seals Science And Technology Co ltd
Priority date: 2020-10-10
Filing date: 2020-10-10
Publication date: 2021-06-01
Anticipated expiration: 2030-10-10

Abstract

The utility model discloses a piston seal, include: the ring-shaped ring comprises a first ring body and a second ring body which are annular, wherein a groove is formed in the inner side of the first ring body, the second ring body is arranged in the groove, and a first bulge, a second bulge and a third bulge are sequentially connected and arranged on the outer side of the first ring body. The first bulge, the second bulge and the third bulge on the second ring body and the outer side of the first ring body can play a role in sealing, the first ring body and the second ring body realize double-acting sealing, the first ring body and the second ring body are mutually supported, and the piston sealing device has good rebound resilience, wear resistance and distortion resistance, is good in sealing performance and is suitable for piston sealing under low pressure and pneumatic working conditions.

Description

Piston seal ring

Technical Field

The utility model relates to a piston seal circle.

Background

The sealing ring is a common part of mechanical equipment, and is used for preventing solid, liquid and/or gas in adjacent spaces of equipment components from flowing mutually, and plays a role in isolating the adjacent spaces.

The commonly used sealing rings are O-shaped rings, Y-shaped rings and U-shaped seals, are widely applied to hydraulic and pneumatic transmission systems and are mainly used for static sealing and reciprocating sealing. The main defects are that the structure is single, the sealing requirement under complex working conditions is difficult to meet, when the sealing device is used for sealing a piston or a piston rod, the sealing device is easy to roll in a groove along with the reciprocating motion of the piston or the piston rod, the anti-distortion capability is poor, and the sealing device is easy to lose efficacy.

SUMMERY OF THE UTILITY MODEL

According to an aspect of the utility model, a piston seal ring is provided, include: the ring-shaped ring comprises a first ring body and a second ring body which are annular, wherein a groove is formed in the inner side of the first ring body, the second ring body is arranged in the groove, and a first bulge, a second bulge and a third bulge are sequentially connected and arranged on the outer side of the first ring body. The first bulge, the second bulge and the third bulge on the second ring body and the outer side of the first ring body can play a role in sealing, the first ring body and the second ring body realize double-acting sealing, the first ring body and the second ring body are mutually supported, and the piston sealing device has good rebound resilience, wear resistance and distortion resistance, is good in sealing performance and is suitable for piston sealing under low pressure and pneumatic working conditions.

In some embodiments, the groove is a trapezoidal groove, and the included angle between the two sides of the trapezoidal groove is an obtuse angle, and the angle is 120-150 degrees.

In some embodiments, the first protrusion and the third protrusion are symmetrically disposed at two ends of the outer side of the first ring body.

In some embodiments, the cross-section of the first protrusion and the third protrusion is an acute triangle with an acute triangle apex angle of 60 ° to 85 °.

In some embodiments, the second protrusion is a protrusion with a trapezoidal cross section, and an included angle between two sides of the trapezoidal protrusion is an obtuse angle.

In some embodiments, the maximum radial width of the first and third lobes is greater than the maximum radial width of the second lobe.

In some embodiments, the second ring body is an O-ring.

In some embodiments, the axial width of the first collar body is greater than the axial width of the second collar body.

In some embodiments, the first ring body, the first protrusion, the second protrusion, and the third protrusion are integrally molded structures. The integration molding integrity is good, the installation is simple, and the sealing effect is good.

In some embodiments, the material of the first ring body is polyurethane and the material of the second ring body is nitrile rubber. The first ring body made of polyurethane material and the second ring body made of nitrile rubber are matched for use, so that the wear resistance of the whole sealing ring is improved, and the service life of the sealing ring is longer.

Drawings

Fig. 1 is a schematic cross-sectional view of a piston seal according to some embodiments of the present invention;

fig. 2 is a schematic view of the installation of the piston seal ring according to some embodiments of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1-2 schematically illustrate a piston seal ring according to an embodiment of the present invention. As shown in the figure, the utility model discloses a piston seal circle is used for the sealed between piston 300 and the piston rod 400, piston 300 and piston rod 400 clearance fit, offers the installation slot 310 who is used for installing the piston seal circle on the piston 300. The piston sealing ring comprises a first ring body 100 and a second ring body 200 which are annular, a groove 110 is arranged on the inner side of the first ring body 100, the second ring body 200 is arranged in the groove 110, and a first bulge 120, a second bulge 130 and a third bulge 140 are sequentially connected and arranged on the outer side of the first ring body 100. The second ring body 200 is in contact with the piston rod 400 and is in interference fit, and the first protrusion 120 and the third protrusion 140 are in contact with the groove bottom of the mounting groove 310 and are in interference fit. The first protrusion 120, the second protrusion 130 and the third protrusion 140 on the outer sides of the second ring body 200 and the first ring body 100 can play a sealing role, the first ring body 100 and the second ring body are matched to realize double-acting sealing, the first ring body 100 and the second ring body 200 are mutually supported, the piston ring has good rebound resilience, wear resistance and distortion resistance, the sealing performance is good, and the piston ring is suitable for sealing the piston 300 under low pressure and pneumatic working conditions.

In this embodiment, the groove 110 is a trapezoidal groove 110, an included angle between two waists of the trapezoidal groove 110 is an obtuse angle, the angle is 120 °, and the groove 110 is disposed at a central position of the inner side of the first ring body 100.

In this embodiment, the first protrusion 120 and the third protrusion 140 are symmetrically disposed at both ends of the outer side of the first ring body 100. The cross sections of the first protrusion 120 and the third protrusion 140 are acute triangles, and the vertex angle of the acute triangle is 80 °. The first protrusion 120 and the third protrusion 140 simultaneously seal the piston 300, and the sealing effect is good.

In this embodiment, the second protrusion 130 is a protrusion with a trapezoidal cross section, and an included angle between two waists of the trapezoidal protrusion is an obtuse angle. When the first protrusion 120 and the third protrusion 140 are pressed to deform, the second protrusion 130 performs sealing, and the contact area of the trapezoidal protrusion is larger, so that the sealing effect is better.

In this embodiment, the maximum radial width of the first protrusion 120 and the third protrusion 140 is greater than the maximum radial width of the second protrusion 130. So that the first protrusion 120 and the third protrusion 140 are deformed first at the time of sealing.

In this embodiment, the second ring body 200 is an O-ring. The O-ring is a force application element, provides sufficient sealing force, and supports the first ring body 100, thereby prolonging the service life of the sealing ring.

In this embodiment, the axial width of the first ring body 100 is greater than the axial width of the second ring body 200.

In this embodiment, the first ring body 100, the first protrusion 120, the second protrusion 130 and the third protrusion 140 are integrally formed. The integration molding integrity is good, the installation is simple, and the sealing effect is good.

In this embodiment, the material of the first ring body 100 is polyurethane, and the material of the second ring body 200 is nitrile rubber. The first ring body 100 made of polyurethane material and the second ring body 200 made of nitrile rubber are matched for use, so that the wear resistance of the whole sealing ring is improved, and the service life of the sealing ring is longer.

The above are only some embodiments of the present invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.

Claims

1. A piston seal ring, comprising: the ring-shaped ring comprises a first ring body and a second ring body which are annular, wherein a groove is formed in the inner side of the first ring body, the second ring body is arranged in the groove, and a first bulge, a second bulge and a third bulge are sequentially connected to the outer side of the first ring body.

2. The piston seal ring according to claim 1, wherein said groove is a trapezoidal groove, and the included angle between the two sides of the trapezoidal groove is an obtuse angle, and the angle is 120 ° to 150 °.

3. The piston seal ring of claim 1 wherein said first and third protrusions are symmetrically disposed on opposite ends of the outer side of said first ring body.

4. The piston seal ring of claim 3 wherein said first and third protrusions have a cross-section in the form of an acute triangle having an apex angle of 60 ° -85 °.

5. The piston seal ring according to claim 4, wherein said second protrusion is a protrusion with a trapezoidal cross section, and the included angle between the two sides of the trapezoidal protrusion is an obtuse angle.

6. The piston seal ring of claim 5 wherein said first and third protrusions have a maximum radial width greater than a maximum radial width of said second protrusion.

7. The piston seal ring of claim 1 wherein said second ring body is an O-ring.

8. The piston seal ring of claim 7 wherein said first ring body has an axial width greater than an axial width of said second ring body.

9. The piston seal ring according to any one of claims 1 to 8 wherein said first ring body, first embossment, second embossment and third embossment are of integrally molded construction.

10. The piston seal ring according to claim 9, wherein the material of said first ring body is polyurethane and the material of said second ring body is nitrile rubber.