Piston with sealing ring with buffering function

Abstract

The utility model relates to the technical field of piston sealing rings, and discloses a piston with a sealing ring with a buffering function, a sealing ring body comprises a connecting ring part and a buffering assembly, the connecting ring part is sleeved on the outer side of the piston, the buffering assembly comprises a transverse buffering part and a lateral buffering part, and the transverse buffering part is sleeved on the outer side of the piston. The transverse buffering part is arranged at one end of the connecting ring part, arc-shaped filler strips are oppositely arranged on the side, away from the connecting ring part, of the transverse buffering part, the lateral buffering part is arranged on the outer side of the connecting ring part, and the caliber of one end of the lateral buffering part is gradually increased towards the transverse buffering part along the limiting protrusion to form a horn structure. The buffering assembly is arranged on the outer side of the connecting part of the sealing ring body, so that the collision impact between a piston and an end cover can be effectively reduced on the premise of ensuring the sealing performance, a certain protection effect is achieved, and the lateral buffering part extending out of the side face of the sealing ring is matched with the transverse buffering part of the arc-shaped filler strip. When mechanical collision occurs between the piston and the end cover, blocking is carried out to achieve the buffering purpose.

Description

Technical Field

[0001] The utility model relates to the technical field of piston sealing rings, in particular to a piston with a sealing ring having a buffering function. Background Technique

[0002] During the compression process of the cylinder, the piston on the piston rod will eventually have a mechanical collision with the end cover. The structure of the existing piston sealing ring is relatively simple. When subjected to a large pressure, the sealing ring is extremely vulnerable to damage, resulting in sudden pressure relief when the piston collides with the end cover, affecting the energy conversion effect. Content of the Utility Model

[0003] The purpose of the utility model is to provide a piston with a sealing ring having a buffering function to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A piston with a sealing ring having a buffering function, including a sealing ring body sleeved on the piston. The sealing ring body includes a connecting ring portion and a buffering component. The connecting ring portion is sleeved on the outside of the piston, and a circle of limiting protrusions is provided in the middle of the inner side of the connecting ring portion. A limiting groove corresponding to the limiting protrusions is opened on the outside of the piston. The buffering component includes a transverse buffering portion and a lateral buffering portion. The transverse buffering portion is arranged at one end of the connecting ring portion, and arc-shaped cushion strips are oppositely arranged on the side of the transverse buffering portion away from the connecting ring portion. The lateral buffering portion is arranged on the outside of the connecting ring portion, and the caliber of one end of it gradually becomes larger from the limiting protrusion to the transverse buffering portion to form a horn structure.

[0005] In the present application solution, the following improvement is made: An arc-shaped chamfer is provided at the connection between the horn structure and the connecting ring portion. By setting the arc-shaped chamfer, stress concentration at this connection is avoided, which affects the structural strength.

[0006] In the present application solution, the following improvement is made: The end of the lateral buffering portion away from the transverse buffering portion extends out of the connecting ring portion to form a limiting step, and a plurality of guiding grooves are equidistantly arranged on the outside of the limiting step. By providing guiding grooves on the outside of the sealing ring body, a certain guiding effect is achieved, which is convenient for the subsequent assembly of the piston and improves the efficiency.

[0007] In the present application solution, the following improvement is made: The longitudinal section of the limiting protrusion is in a V-shaped structure, the opening angle of the V-shaped structure is 110 - 130°, and an arc is provided at the intersection of the V-shaped structure. Through the matching setting between the limiting protrusion and the limiting groove, a tight connection between the sealing ring body and the piston is realized, ensuring good sealing of the combined body.

[0008] In the present application solution, the following improvement is made: A channel one is opened in the middle of the piston, and a positioning step for placing a magnetic ring is provided in the middle of the end of the piston away from the limiting protrusion.

[0009] In the solution of this application, the following improvements are made. A second passage in the shape of a frustum of a cone is provided in the middle of the positioning step, and the smallest opening end of the second passage communicates with the first passage.

[0010] Compared with the prior art, the present utility model provides a piston with a sealing ring having a buffering effect, and has the following beneficial effects:

[0011] By providing a buffering component on the outer side of the connecting portion of the sealing ring body, the present utility model can effectively reduce the collision impact between the piston and the end cover on the premise of ensuring the sealing performance, and play a certain protective role. The lateral buffering portion extending out of the side of the sealing ring cooperates with the transverse buffering portion provided with an arc-shaped cushion strip to block during the mechanical collision between the piston and the end cover to achieve the buffering purpose. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a structural schematic diagram of the present utility model;

[0013] Figure 2 is a sectional view of the present utility model;

[0014] Figure 3 is a sectional view of the piston.

[0015] In the figure: 1, sealing ring body; 11, connecting ring portion; 12, limiting protrusion; 121, arc; 2, piston; 21, limiting groove; 22, first passage; 23, positioning step; 231, second passage; 3, transverse buffering portion; 31, arc-shaped cushion strip; 4, lateral buffering portion; 41, horn structure; 42, arc-shaped chamfer; 43, limiting step; 44, guiding groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following will describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model:

[0017] Such as Figure 1-2As shown in the figure, a piston with a buffer seal ring includes a seal ring body 1 sleeved on the piston 2, which is mainly composed of a connecting ring part 11 and a buffer component. A circle of limit protrusions 12 is provided in the middle of the inner side of the connecting ring part 11. The buffer component includes a transverse buffer part 3 and a lateral buffer part 4. The transverse buffer part 3 is arranged at one end of the connecting ring part 11, and two arc-shaped cushion strips 31 are oppositely arranged on the side of the transverse buffer part 3 away from the connecting ring part 11. The lateral buffer part 4 is arranged outside the connecting ring part 11, and the diameter of one end of it gradually increases along the limit protrusion 12 towards the transverse buffer part 3 to form a horn structure 41. An arc chamfer 42 is provided at the connection between the horn structure 41 and the connecting ring part 11. One end of the lateral buffer part 4 extending away from the transverse buffer part 3 extends out of the connecting ring part 11 to form a limit step 43, and a number of guide grooves 44 are equidistantly arranged on the outside of the limit step 43.

[0018] As Figure 3 shown in the figure, a limit groove 21 corresponding to and cooperating with the limit protrusion 12 is provided on the outer side of the piston 2. The longitudinal section of the limit protrusion 12 is a V-shaped structure, and the opening angle of the V-shaped structure is 120°. An arc 121 is provided at the intersection of the V-shaped structure. The seal ring body 1 is sleeved on the outside of the piston 2 through the connecting ring part 11. A channel one 22 is provided in the middle of the piston 2, and a positioning step 23 for placing a magnetic ring is provided in the middle of one end of the piston 2 away from the limit protrusion 12. A channel two 231 in the shape of a frustum of a cone is provided in the middle of the positioning step 23. The smallest opening end of the channel two 231 is communicated with the channel one 22, and the apex angle of the frustum of the cone of the channel two 231 is 100°.

[0019] The above embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

Claims

1. A piston with a buffer sealing ring, comprising a sealing ring body (1) sleeved on a piston (2), characterized in that: The sealing ring body (1) includes a connecting ring portion (11) and a buffer assembly. The connecting ring portion (11) is sleeved outside the piston (2), and a circumferential limiting protrusion (12) is provided in the middle of the inner side of the connecting ring portion (11). A limiting groove (21) corresponding to and cooperating with the limiting protrusion (12) is formed on the outside of the piston (2). The buffer assembly includes a transverse buffer portion (3) and a lateral buffer portion (4). The transverse buffer portion (3) is arranged at one end of the connecting ring portion (11), and arc-shaped cushion strips (31) are oppositely arranged on the side of the transverse buffer portion (3) away from the connecting ring portion (11). The lateral buffer portion (4) is arranged outside the connecting ring portion (11), and the diameter of one end of the lateral buffer portion (4) gradually increases from the limiting protrusion (12) towards the transverse buffer portion (3) to form a horn structure (41).

2. The piston with a buffer seal ring according to claim 1, characterized in that: An arc-shaped chamfer (42) is provided at the connection between the horn structure (41) and the connecting ring portion (11).

3. The piston with a buffer sealing ring according to claim 1, characterized in that: One end of the lateral buffer portion (4) away from the transverse buffer portion (3) extends out of the connecting ring portion (11) to form a limiting step (43), and a plurality of guiding grooves (44) are equidistantly arranged on the outside of the limiting step (43).

4. The piston with a buffer sealing ring according to claim 1, characterized in that: The longitudinal section of the limiting protrusion (12) is in a V-shaped structure, the opening angle of the V-shaped structure is 110-130°, and an arc (121) is provided at the intersection of the V-shaped structure.

5. The piston with a buffer sealing ring according to claim 1, characterized in that: A channel one (22) is formed in the middle of the piston (2), and a positioning step (23) for placing a magnetic ring is provided in the middle of the end of the piston (2) away from the limiting protrusion (12).

6. The piston with a buffer sealing ring according to claim 5, characterized in that: A channel two (231) in a frustum shape is formed in the middle of the positioning step (23). The channel two (231) The smallest opening end of which is communicated with the channel one (22).

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