A reciprocating dynamic fit seal structure

Abstract

The utility model discloses a kind of reciprocating type dynamic cooperation sealing structures, to provide a reciprocating type dynamic cooperation sealing structure with high reliability and stability, its technical scheme main point is including rotating shaft sleeve and the stationary sealing seat of being sleeved in rotating shaft outside, the rotating shaft sleeve outer circumferential side is equipped with annular sealing groove, sealing assembly is equipped in the annular sealing groove, sealing cavity with sealing assembly is equipped between the rotating shaft sleeve and stationary sealing seat, and the sealing assembly includes the main sealing piece with metal net structure inside and the auxiliary sealing piece for compensating the sealing property between main sealing piece and rotating shaft sleeve. The utility model is applicable to rotating shaft sealing piece technical field.

Description

Technical Field

[0001] This utility model relates to the technical field of shaft seals, and more specifically, to a reciprocating dynamic fit sealing structure. Background Technology

[0002] Currently, dynamic sealing components are widely used in cabinets such as environmental protection cabinets and gas-filled cabinets. They are generally installed between the switch body and the operating mechanism, with the side with the sealing ring contacting the gas box. The switch assembly is inside the gas box, and the operating mechanism is outside. The dynamic sealing component acts as a connector, and since the gas box is filled with gas, it also provides a seal. Common traditional reciprocating sealing structures such as O-rings and lip seals have many problems in practical applications. O-rings are prone to wear and extrusion deformation under high pressure and high speed conditions, leading to seal failure. Although lip seals have good sealing performance, their high frictional resistance increases the operating energy consumption of the equipment and also easily causes wear on the sealing surface, shortening its service life. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a reciprocating dynamic fit sealing structure with high reliability and stability.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a reciprocating dynamic fit sealing structure, including a rotating bushing and a stationary sealing seat sleeved outside the rotating shaft. The outer circumference of the rotating bushing is provided with an annular sealing groove, and a sealing component is provided in the annular sealing groove. A sealing cavity adapted to the sealing component is provided between the rotating bushing and the stationary sealing seat. The sealing component includes a main sealing element with an internal metal mesh structure and an auxiliary sealing element for compensating for the sealing performance between the main sealing element and the rotating bushing.

[0005] The present invention is further configured such that: the outer side of the main sealing member is provided with a self-cleaning protrusion structure that contacts the rotating bushing; the self-cleaning protrusion structure can scrape and clean any impurities that may be attached to the inner wall of the sealing cavity when the rotating bushing rotates.

[0006] The present invention is further configured such that: the auxiliary sealing element is a flexible sealing ring supported by a shape memory alloy ring, which is used to automatically adjust the radial sealing force of the flexible sealing ring according to the sealing environment temperature.

[0007] The present invention is further configured such that: a lubrication structure is provided inside the sealing cavity, the lubrication structure includes a plurality of interconnected oil storage chambers disposed in the static sealing seat, each oil storage chamber is provided with an oil outlet communicating with the sealing cavity, and an elastic ball disposed in the oil outlet.

[0008] The present invention is further configured such that: the static sealing seat is provided with a heat dissipation structure, the heat dissipation structure including a heat dissipation channel disposed in the static sealing seat and a heat-conducting medium filled in the heat dissipation channel.

[0009] The present invention is further configured such that: the inner wall of the sealing cavity is provided with a micro-texture structure, the micro-texture structure including a matrix of regularly arranged grooves, for storing a small amount of lubricating medium, forming a stable lubricating film during the dynamic sealing process, and reducing the friction coefficient between the sealing surfaces.

[0010] The beneficial effects of this utility model are:

[0011] 1. The annular sealing groove on the outer circumference of the rotating bushing provides a stable mounting position for the sealing assembly. The sealing assembly can be firmly installed within the annular sealing groove, preventing displacement or shaking during the rotation of the rotating bushing. This ensures that the sealing assembly maintains a good sealing condition at all times, improving the reliability of the sealing structure. Simultaneously, the annular sealing groove also provides some protection for the sealing assembly, preventing external impurities from entering the sealing assembly and affecting its sealing performance. The sealing cavity between the rotating bushing and the stationary sealing seat is compatible with the sealing assembly, allowing the sealing assembly to fully exert its sealing function during operation. The metal mesh structure inside the main seal enhances the overall structural stability of the main seal. Under high-speed rotation of the rotating bushing or under certain pressure, the metal mesh prevents excessive deformation of the main seal due to stress, ensuring it always maintains a tight fit with the rotating bushing and the stationary sealing seat. The auxiliary seal compensates for the gaps in the main seal caused by wear and adaptation to temperature and pressure fluctuations, further improving sealing performance.

[0012] 2. The self-cleaning raised structure on the outer side of the main seal plays a crucial cleaning role during the rotation of the rotating bushing. In the sealing environment, various impurities easily adhere to the inner wall of the sealing cavity. The presence of these impurities can damage the flatness of the sealing surface, leading to a decrease in sealing performance and subsequently causing media leakage. The self-cleaning raised structure acts like a scraper, cleaning the inner wall of the sealing cavity during the rotation of the bushing, promptly removing these adhered impurities, ensuring the cleanliness and flatness of the sealing surface, maintaining good sealing performance, and extending the effective service life of the sealing structure. The auxiliary seal uses a flexible sealing ring supported by a shape memory alloy ring. The shape memory alloy ring can automatically adjust its shape according to changes in the sealing environment temperature. When the temperature rises, the shape memory alloy ring deforms, increasing the support force on the flexible sealing ring, enabling it to maintain sufficient radial sealing force. When the temperature drops, the shape memory alloy ring returns to its original shape, ensuring that the flexible sealing ring does not lose its sealing performance due to excessive hardening.

[0013] 3. The presence of a lubrication structure significantly reduces wear on the sealing components. During the relative movement of the rotating bushing and the stationary seal seat, the sealing components rub against each other. Lubricating oil in the oil reservoir flows out through the oil outlet, forming a lubricating film within the sealing cavity. This lubricating film acts as a buffer layer, separating the sealing components from direct contact with other parts and reducing friction. The elastic ball component in the oil outlet precisely controls the oil flow. When the pressure change caused by the relative movement of the rotating bushing and the stationary seal seat reaches a certain level, it squeezes the elastic ball component. After the elastic ball component is squeezed and deformed, the channel of the oil outlet opens, allowing lubricating oil to flow out. When the pressure returns to normal, the elastic ball component returns to its original shape, closing the oil outlet.

[0014] 4. The heat dissipation structure within the static sealing seat effectively conducts heat away through heat dissipation channels and the heat-conducting medium filling them. The heat-conducting medium has excellent thermal conductivity, allowing it to quickly absorb the heat generated by the sealing structure and transfer it to the external environment through the heat dissipation channels. The microscopic texture structure on the inner wall of the sealing cavity, namely the regularly arranged matrix of grooves, can store a small amount of lubricating medium during dynamic sealing. These grooves act like tiny "oil depots," continuously releasing lubricating medium as the sealing surfaces move relative to each other, forming a stable lubricating film. This lubricating film separates the sealing surfaces, reducing direct contact and thus lowering the coefficient of friction between them. During the rotation of the rotating bushing, the lubricating film acts as a buffer and lubricant, making the relative movement between the sealing surfaces smoother and reducing wear and energy loss. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a cross-sectional view of the present invention;

[0017] Figure 3 This is a magnified view of point A;

[0018] Figure 4 The inner bottom surface of the sealed cavity;

[0019] Figure 1-4 Reference numerals: 1. Rotating bushing; 2. Stationary sealing seat; 3. Annular sealing groove; 4. Sealing cavity; 5. Main seal; 6. Auxiliary seal; 7. Self-cleaning raised structure; 8. Oil reservoir; 9. Elastic ball; 10. Heat dissipation channel; 11. Heat transfer medium; 12. Groove matrix. Detailed Implementation

[0020] Reference Figures 1 to 4 The embodiments of this utility model will be further described below.

[0021] For ease of explanation, spatial relative terms such as “up,” “down,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “down” of other elements or features would be positioned “up” of those other elements or features. Therefore, the exemplary term “down” can encompass both up and down orientations. The device may be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0022] Moreover, relational terms such as “first” and “second” are used merely to distinguish one component from another that has the same name, without necessarily requiring or implying any such actual relationship or order between the components.

[0023] Figures 1 to 4 The reciprocating dynamic fit sealing structure shown includes a rotating bushing 1 and a stationary sealing seat 2 fitted around the rotating shaft. The rotating bushing 1 has an annular sealing groove 3 on its outer circumference, within which a sealing component is housed. This provides a stable installation position, allowing the sealing component to be securely installed within the annular sealing groove 3. This prevents displacement or shaking during the rotation of the rotating bushing 1, ensuring the sealing component maintains a good sealing condition and improving the reliability of the sealing structure. Simultaneously, the annular sealing groove 3 also provides some protection for the sealing component, preventing external impurities from entering and affecting its sealing performance. A sealing cavity 4, adapted to the sealing assembly, is provided between the rotating bushing 1 and the stationary sealing seat 2, enabling the sealing assembly to fully exert its sealing function during operation. The sealing assembly includes a main sealing element 5 with an internal metal mesh structure and an auxiliary sealing element 6 for compensating for the sealing between the main sealing element 5 and the rotating bushing 1. The metal mesh structure inside the main sealing element 5 enhances the overall structural stability of the main sealing element 5. Under high-speed rotation or pressure, the metal mesh prevents the main sealing element 5 from deforming excessively due to stress, ensuring that it always fits tightly against the rotating bushing 1 and the stationary sealing seat 2. The auxiliary sealing element 6 compensates for the gaps in the main sealing element 5 caused by wear and to adapt to temperature and pressure fluctuations, further improving the sealing performance.

[0024] The main seal 5 has a self-cleaning protrusion 7 on its outer side that contacts the rotating sleeve 1. In a sealed environment, various impurities easily adhere to the inner wall of the sealing cavity 4. The presence of these impurities can damage the flatness of the sealing surface, leading to a decrease in sealing performance and potentially causing media leakage. The self-cleaning protrusion 7 acts like a scraper, cleaning the inner wall of the sealing cavity 4 during the rotation of the rotating sleeve 1, promptly removing these adhering impurities, ensuring the cleanliness and flatness of the sealing surface, maintaining good sealing performance, and extending the effective service life of the sealing structure. The auxiliary seal 6 uses a flexible sealing ring supported by a shape memory alloy ring.

[0025] The auxiliary sealing element 6 is a flexible sealing ring supported by a shape memory alloy ring. It is used to automatically adjust the radial sealing force of the flexible sealing ring according to the sealing environment temperature. The shape memory alloy ring can automatically adjust its shape according to the change of sealing environment temperature. When the temperature rises, the shape memory alloy ring will deform, increasing the support force on the flexible sealing ring, so that the flexible sealing ring can maintain sufficient radial sealing force. When the temperature drops, the shape memory alloy ring will return to its original shape, ensuring that the flexible sealing ring will not lose its sealing performance due to excessive hardness.

[0026] The sealing cavity 4 is equipped with a lubrication structure, which includes several interconnected oil storage chambers 8 disposed within the stationary sealing seat 2. Each oil storage chamber 8 has an oil outlet communicating with the sealing cavity 4, and an elastic ball 9 disposed within the oil outlet. The presence of the lubrication structure can significantly reduce the wear of the sealing assembly. During the relative movement of the rotating bushing 1 and the stationary sealing seat 2, the sealing assembly will rub against them. The interconnected oil storage chambers 8 facilitate the replenishment of lubricating medium. The lubricating oil in the oil storage chambers 8 flows out through the oil outlet, forming a lubricating film within the sealing cavity 4. This lubricating film acts as a buffer layer, separating the sealing assembly from direct contact with other components and reducing friction. The elastic ball 9 plays a role in precisely controlling the oil output within the oil outlet. When the pressure change generated by the relative movement of the rotating bushing 1 and the stationary sealing seat 2 reaches a certain level, it will squeeze the elastic ball 9. After the elastic ball 9 is squeezed and deformed, the channel of the oil outlet will open, allowing the lubricating oil to flow out. When the pressure returns to normal, the elastic ball 9 will return to its original shape, closing the oil outlet.

[0027] The static sealing seat 2 is also provided with a heat dissipation structure, which includes a heat dissipation channel 10 disposed in the static sealing seat 2 and a heat-conducting medium 11 filled in the heat dissipation channel 10. It can effectively conduct heat away. The heat-conducting medium 11 has good thermal conductivity. It can quickly absorb the heat generated by the sealing structure and transfer the heat to the external environment through the heat dissipation channel 10.

[0028] The inner wall of the sealing cavity 4 is provided with a micro-textured structure, which includes a matrix of regularly arranged grooves 12. This structure can store a small amount of lubricating medium during dynamic sealing. These grooves act like tiny "oil depots," continuously releasing the lubricating medium as the sealing surfaces move relative to each other, forming a stable lubricating film. This lubricating film separates the sealing surfaces, reducing direct contact and thus lowering the coefficient of friction between them. During the rotation of the rotating bushing 1, the lubricating film acts as a buffer and lubricant, making the relative movement between the sealing surfaces smoother and reducing wear and energy loss.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A reciprocating dynamic fit sealing structure, comprising a rotating shaft sleeve (1) and a stationary sealing seat (2) sleeved on the outside of the rotating shaft, characterized in that, The outer circumference of the rotating bushing (1) is provided with an annular sealing groove (3), and a sealing assembly is provided in the annular sealing groove (3). A sealing cavity (4) adapted to the sealing assembly is provided between the rotating bushing (1) and the stationary sealing seat (2). The sealing assembly includes a main sealing element (5) with an internal metal mesh structure and an auxiliary sealing element (6) for compensating for the sealing performance between the main sealing element (5) and the rotating bushing (1).

2. The reciprocating dynamic fit sealing structure according to claim 1, characterized in that, The main seal (5) has a self-cleaning protrusion structure (7) on its outer side that contacts the rotating bushing (1). When the rotating bushing (1) rotates, the self-cleaning protrusion structure can scrape and clean any impurities that may be attached to the inner wall of the sealing cavity (4).

3. The reciprocating dynamic fit sealing structure according to claim 1, characterized in that, The auxiliary sealing element (6) is a flexible sealing ring supported by a shape memory alloy ring, which is used to automatically adjust the radial sealing force of the flexible sealing ring according to the sealing environment temperature.

4. The reciprocating dynamic fit sealing structure according to claim 1, characterized in that, The sealing cavity (4) is provided with a lubrication structure, which includes a plurality of interconnected oil storage chambers (8) provided in the stationary sealing seat (2), each oil storage chamber (8) being provided with an oil outlet communicating with the sealing cavity (4) and an elastic ball (9) provided in the oil outlet.

5. The reciprocating dynamic fit sealing structure according to claim 1, characterized in that, The static sealing seat (2) is also provided with a heat dissipation structure, which includes a heat dissipation channel (10) disposed in the static sealing seat (2) and a heat-conducting medium (11) filled in the heat dissipation channel (10).

6. The reciprocating dynamic fit sealing structure according to claim 1, characterized in that, The inner wall of the sealing cavity (4) is provided with a micro-texture structure, which includes a matrix of regularly arranged grooves (12) for storing a small amount of lubricating medium, forming a stable lubricating film during the dynamic sealing process, and reducing the friction coefficient between the sealing surfaces.

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