CN211117544U

CN211117544U - Piston sealing structure

Info

Publication number: CN211117544U
Application number: CN201921996835.1U
Authority: CN
Inventors: 倪建成; 宋爱民; 徐梦诚
Original assignee: Jiangsu Aoshi Forging Technology Co ltd
Current assignee: Jiangsu Aoshi Forging Technology Co ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-07-28
Anticipated expiration: 2029-11-18

Abstract

The utility model discloses a piston seal structure. The piston sealing structure comprises a piston and a first sealing ring, wherein the outer ring of the piston is provided with at least one first sealing ring groove matched with the first sealing ring, the end surface of the air inlet side of the piston is provided with at least one air passage, the air passage is communicated with the groove bottom of the first sealing ring groove, and the sealing ring is clamped in the first sealing ring groove. No matter the size of the sealing ring is too small or the sealing ring is abraded, when the gas pressure is increased, the outer diameter of the first sealing ring is gradually increased until the first sealing ring is contacted with the surface to be sealed, and therefore a good sealing effect can be achieved.

Description

Piston sealing structure

Technical Field

The utility model relates to a piston in the clutch, in particular to seal structure of piston.

Background

The pneumatic friction clutch of block type or piece type is often adopted in the hot die forging press, its principle is all through the cylinder for the clutch admit air, the piston separates into high-pressure chamber and normal pressure chamber (atmospheric pressure) with the clutch, the pressure of the side of admitting air of piston risees, thereby the piston moves towards the normal pressure chamber that clutch block or friction disc are located, and compress tightly clutch block or friction disc, thereby transmit the rotation of flywheel for the bent axle, in this process, the sealed effect of piston is vital, the sealing of piston is realized through the sealing washer, whether the sealing washer is suitable, it is vital to the stability of piston motion, the sealed of the piston of current clutch has following problem:

1. if the sealing washer undersize or piston sealing washer is worn and torn, lead to the problem that piston motion is smooth or the gas leakage easily, light then the clutch sends the abnormal sound, and then the transmission function of clutch can receive very big influence greatly to because the size of piston sealing washer is general bigger, when the sealing washer wearing and tearing back, it often wastes time and energy to change the sealing washer, and the cost is higher.

2. When the design clearance requirement between the piston and the cylinder is large, the common sealing ring is difficult to meet the sealing requirement.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a seal structure of clutch, through this kind of seal structure, can guarantee the sealed effect of piston in the cylinder.

In order to realize the above utility model purpose, the utility model relates to a piston seal structure adopts following technical scheme:

the utility model provides a piston seal structure, includes piston, sealing washer one, the outer lane of piston seted up at least one with a assorted sealing washer groove one, at least one air flue has been seted up to the terminal surface of piston air inlet side, the air flue with the tank bottom intercommunication in sealing washer groove one, the sealing washer has been blocked and has been located in the sealing washer groove one.

The utility model discloses the during operation, the clutch admits air, and piston admit air side atmospheric pressure risees, and gas gets into the air flue to sealing washer one produces radial pressure, sealing washer one along the outside expansion of sealing washer groove one orientation, thereby the diameter crescent of sealing washer one, thereby has improved the sealed effect of this piston in the clutch.

Compared with the prior art, the beneficial effects of the utility model reside in that: no matter the size of the sealing ring is too small or the sealing ring is abraded, when the gas pressure is increased, the outer diameter of the first sealing ring is gradually increased until the first sealing ring is contacted with the surface to be sealed, and therefore a good sealing effect can be achieved.

On the basis of the technical scheme, the utility model discloses can also do as follows the improvement:

further: an inner ring of the sealing ring is provided with a first groove communicated with the air passage. The beneficial effect of this step: through the first groove, the first sealing ring can better bear the pressure of gas.

Further: the first groove is a U-shaped groove.

Further: the air passages are arranged on a circumference which takes the axis of the piston as a central line. The beneficial effect of this step: the air passages can ensure that the first sealing ring groove can quickly intake air.

Further: the end face of the air inlet side of the piston is provided with a third groove, and the air passage is arranged in the third groove. The beneficial effect of this step: groove three enables the gas to concentrate in groove three to better one kind is intake towards the seal ring groove.

Further: the air passages are uniformly distributed on a circumference which takes the axis of the piston as a central line. The beneficial effect of this step: the air inlet in the first sealing ring groove can be more uniform.

Further: the piston is provided with a through hole along the axis, the inner wall of the through hole is provided with at least one second sealing ring groove, a second matched sealing ring is clamped in the second sealing ring groove, and the second sealing ring groove is communicated with the air passage.

Further: and a second groove communicated with the air passage is formed in the outer ring of the sealing ring.

Further: the second groove is a U-shaped groove.

Further: the number of the air passages is multiple, wherein part of the air passages are a first group of air passages, the rest of the air passages are a second group of air passages, the first group of air passages are arranged on a first circumference which takes the axis of the piston as a central line, the second group of air passages are arranged on a second circumference which takes the axis of the piston as a central line, the diameter of the first circumference is larger than that of the second circumference, the first group of air passages are communicated with the first groove, and the second group of air passages are communicated with the second groove.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic structural diagram according to a first embodiment;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is a schematic structural diagram of the second embodiment

Fig. 4 is a partially enlarged view of B in fig. 3.

The piston 1, the first sealing ring groove 101, the third groove 102, the air passage 103, the second sealing ring groove 104, the first sealing ring 2, the first groove 201, the second sealing ring 3 and the second groove 301.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience of description and simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. 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 this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Example one

As shown in fig. 1-2, a sealing structure of a piston 1 comprises a piston 1 and a first sealing ring 2, wherein at least one first sealing ring groove 101 matched with the first sealing ring 2 is formed in an outer ring of the piston 1, the first sealing ring 2 is clamped in the first sealing ring groove 101, a first groove 201 is formed in an inner ring of the first sealing ring 2, the first groove 201 is a U-shaped groove, a third groove 102 is formed in an end surface of an air inlet side of the piston 1, the third groove 102 is annular, a plurality of air passages 103 communicated with a groove bottom of the first sealing ring groove 101 and the first groove 201 are formed in the third groove 102, and all the air passages 103 are uniformly distributed on the same circumference with an axis of the piston 1 as a.

The specific working process and principle of the first embodiment are as follows:

when the clutch admits air, the entering air is located at the air inlet end of the piston 1, the air enters the space between the first sealing ring groove 101 and the first groove 201 through the air channel 103, and the first sealing ring 2 is radially expanded by air pressure, so that the sealing effect of the piston 1 in the clutch during movement is improved.

Example two

As shown in fig. 3-4, the second embodiment is different from the first embodiment in that the piston 1 is further provided with a through hole along the axis, the inner wall of the through hole is provided with at least one second seal ring groove 104, the second seal ring groove 104 is provided with a second matching seal ring 3 in a clamped manner, the outer ring of the second seal ring 3 is provided with a second groove 301, the second groove 301 is a U-shaped groove, the plurality of air passages 103 are provided, a part of the air passages 103 are set as a first group of air passages 103, the remaining air passages 103 are set as a second group of air passages 103, the first group of air passages 103 are arranged on a first circumference taking the axis of the piston 1 as the center line, the second group of air passages 103 are arranged on a second circumference taking the axis of the piston 1 as the center line, the first circumference diameter is larger than the second circumference diameter, the first group of air passages 103 are communicated.

The specific working process and principle of the second embodiment are as follows:

when the clutch admits air, the entering air is located at the air inlet end of the piston 1, the air enters the space between the first sealing ring groove 101 and the first groove 201 through the air passage 103 of the first circumference, the air enters the space between the second sealing ring groove 104 and the second groove 301 through the air passage 103 of the second circumference, and the first sealing ring 2 and the second sealing ring 3 are radially expanded by air pressure, so that the sealing effect of the piston 1 during movement in the clutch is improved.

The structural characteristics of the first embodiment are suitable for the matching condition of the outer wall of the piston 1 and the clutch, the structural characteristics of the second embodiment are suitable for the matching condition of the outer wall of the piston 1 and the opening of the piston 1 which are required to be matched with other corresponding parts, and certainly, if the opening condition of the piston 1 exists in the second embodiment, the sealing structure of the piston 1 only in the first embodiment can obviously play a role in improving the sealing effect of the piston 1 to a certain extent.

In the specification of the present invention, a large number of specific details are explained. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. The utility model provides a piston seal structure, its characterized in that, includes piston, sealing washer one, the outer lane of piston seted up at least one with sealing washer one assorted sealing washer groove one, at least one air flue has been seted up to the terminal surface of piston air inlet side, the air flue with the tank bottom intercommunication in sealing washer groove one, the sealing washer has been located in the sealing washer groove one.

2. The piston seal structure according to claim 1, characterized in that a first groove communicated with the air passage is formed in an inner ring of the seal ring.

3. The piston seal structure of claim 2 wherein said first recess is a U-shaped groove.

4. The piston seal structure according to claim 3, wherein there are a plurality of said air passages, and said air passages are provided on a circumference having a piston axis as a center line.

5. The piston sealing structure according to claim 4, characterized in that the end surface of the inlet side of the piston is provided with a third groove, and the air passage is arranged in the third groove.

6. The piston seal structure according to claim 5, wherein the air passages are uniformly distributed on a circumference having a piston axis as a center line.

7. The piston sealing structure according to claim 6, characterized in that the piston is provided with a through hole along the axis, the inner wall of the through hole is provided with at least one second sealing ring groove, a second matching sealing ring is clamped in the second sealing ring groove, and the second sealing ring groove is communicated with the air passage.

8. The piston seal structure of claim 7, wherein the outer ring of the seal ring is provided with a second groove communicated with the air passage.

9. The piston seal structure of claim 8, wherein said second groove is a U-shaped groove.

10. The piston seal structure according to claim 9, wherein there are a plurality of the air passages, wherein a part of the air passages are a first group of air passages, and the remaining air passages are a second group of air passages, the first group of air passages are provided on a first circumference having the piston axis as a center line, the second group of air passages are provided on a second circumference having the piston axis as a center line, the first circumference diameter is larger than the second circumference diameter, the first group of air passages communicate with the first groove, and the second group of air passages communicate with the second groove.