Piston sealing structure capable of automatically storing oil

Abstract

According to the technical scheme, the automatic oil storage piston sealing structure is characterized by comprising a sealing piece and a using device, the using device is provided with a part to be sealed, the sealing piece is provided with a sealing part and a sealing installation part, the sealing piece is used for sealing the part to be sealed, and the sealing part is attached to the part to be sealed. Grease is smeared between the to-be-sealed part and the sealing part, an oil storage groove is formed in the sealing part and communicated with the to-be-sealed part, the sealing installation part is arranged on a using device or is independent of the using device, the sealing installation part is used for installing the sealing part, and the sealing part is in sliding contact with the to-be-sealed part. By arranging the sealing structure capable of automatically storing oil, long-time lubricating oil in the moving process is guaranteed, smooth movement between the piston sealing ring and the piston cylinder is guaranteed, the service life is longer, and meanwhile the structure is simple and reliable.

Description

Technical Field

[0001] This utility model relates to the field of sanitary ware technology, and more specifically to an automatic oil storage piston sealing structure. Background Technology

[0002] The pneumatic starting assembly of the drain valve, such as the pneumatic starting device in patent "CN217974638U", has an inverted cylinder assembly. By injecting gas into the cylinder, the piston is pushed to start the drain valve and drain water. The cylinder of the pneumatic assembly includes a cylinder, a piston, a piston seal ring, and a reset element (spring) to reset the piston. In the event of a gas leak, the piston is pushed back to its original position by the reset element, thereby completing the drain valve starting process.

[0003] However, existing seals cannot store oil during use. When in use or in an unused, idle state, the grease inside the device that requires lubrication is easily lost, leading to jamming. This is especially true when the seals are used on existing cylinder assemblies. For example, in patent CN217974638U, when the cylinder assembly scrapes the cylinder wall oil multiple times during reciprocating motion, the lubricating oil inside the piston cylinder will flow out with the cylinder wall or sink to the bottom, resulting in poor movement or even jamming after prolonged use. This causes the piston to remain in the starting state for a long time, preventing the drain valve from closing and causing water leakage. Utility Model Content

[0004] To solve the above problems, this utility model provides the following technical solution:

[0005] An automatic oil-storing piston sealing structure includes a sealing element and a user device. The user device has a part to be sealed. The sealing element has a sealing portion and a sealing mounting portion. The sealing element is used to seal the part to be sealed. The sealing portion is in contact with the part to be sealed. Grease is applied between the part to be sealed and the sealing portion. The sealing portion is provided with an oil storage groove, which is in communication with the part to be sealed. The sealing mounting portion is provided on the user device or is provided independently of the user device. The sealing mounting portion is used to install the sealing portion. The sealing portion and the part to be sealed are in sliding contact.

[0006] The present invention is further configured such that: the upper surface of the sealing part is recessed inward to form an oil storage groove with the opening facing upward.

[0007] The present invention is further configured such that: a movable part is provided between the oil storage tank and the part to be sealed; when the oil storage tank is subjected to a force from the opening to the bottom of the tank, the movable part flips the oil storage tank outward, and the oil in the oil storage tank flows to the part to be sealed to keep the part to be sealed lubricated.

[0008] The present invention is further configured such that: the sealing part includes a sealing ring extending axially along one side of the sealing mounting part, the upper surface of the sealing ring is recessed inward to form an oil storage groove with the opening facing upward, the sealing ring gradually tilts inward along the groove opening towards the bottom of the groove, and when the sealing part is subjected to a force in the direction from the groove opening to the bottom of the groove, the sealing ring flips outward.

[0009] The present invention is further configured such that: the side of the oil storage tank near the part to be sealed is inclined inward from the opening to the bottom of the tank, thereby forming a guiding surface, which facilitates the flow of grease into the oil storage tank.

[0010] The present invention is further configured such that: the sealing part includes a sealing ring extending axially along one side of the sealing mounting part, and a protruding edge protruding radially outward along the sealing ring, the upper surface of the protruding edge being recessed inward to form an oil storage groove with the opening facing upward, and when the sealing part is subjected to a force in the direction from the groove opening to the bottom of the groove, the protruding edge is turned outward.

[0011] The present invention is further configured such that: the device is a piston, the part to be sealed is the piston cylinder wall, and the part of the sealing part that contacts the piston cylinder wall is provided with an oil storage tank.

[0012] The present invention is further configured such that: the piston includes a piston seat and a piston cylinder; the sealing part is a piston sealing ring; the sealing mounting part is disposed on the piston seat of the piston; the inner ring and / or outer ring of the piston sealing ring is in sealing fit with the piston seat; the inner ring and / or outer ring of the piston sealing ring is movable relative to the piston cylinder wall; and an oil storage groove is provided on the end face or side wall where the piston sealing ring mates with the piston cylinder wall.

[0013] The present invention is further configured such that: the oil storage tank bottom C is located on the side close to the part to be sealed, and the distance from C to the part to be sealed is greater than the distance from the oil storage tank opening D to the part to be sealed.

[0014] The present invention is further configured such that: the included angle α between the edge or tangent line of the oil storage tank near the part to be sealed and the part to be sealed is less than 90°.

[0015] Compared with the prior art, the present invention has at least the following advantages:

[0016] 1. By incorporating an oil reservoir on the seal, when there is excess grease on the cylinder wall, it flows downwards and is stored in the reservoir. This ensures a continuous supply of lubricating oil during operation, guaranteeing smooth movement between the seal and the device, extending service life, and providing a simple and reliable structure. Specifically, before use, grease is applied to the area to be sealed and / or the sealing part. The area to be sealed and the sealing part slide relative to each other. When the oil reservoir is subjected to a force from the opening to the bottom, if there is a large amount of grease on the area to be sealed, the excess grease will flow into and be stored in the reservoir due to the relative movement between the area to be sealed and the sealing part. When stationary, the grease will also flow downwards along the area to be sealed and eventually be stored in the reservoir. Later in use, the grease will gradually decrease, at which point the grease in the reservoir will exceed the amount on the area to be sealed. The grease in the reservoir will then replenish the lubrication of the area to be sealed, ultimately ensuring a longer period of lubrication for the device during operation.

[0017] 2. By setting up a movable part, when the part to be sealed moves downward relative to the oil reservoir, the movable part will deform slightly outward, thereby flipping the oil reservoir outward and making the oil reservoir closer to the cylinder wall. This allows the grease in the oil reservoir to be coated on the cylinder wall, and when there is too much grease on the cylinder wall, the grease will flow more easily into the oil reservoir.

[0018] 3. By providing an inclined surface on the side of the sealing part near the part to be sealed, the contact between the sealing part and the cylinder wall is made tighter and the sealing performance is stronger; a guide surface is provided on the oil reservoir so that the grease on the part to be sealed can flow more easily into the oil reservoir, and at the same time facilitate the replenishment of oil.

[0019] 4. The oil storage tank is located at point C on the side of the part to be sealed, and the distance from point C to the part to be sealed is greater than that at point D of the oil storage tank opening. This makes the oil storage tank "inverted V" and the bottom of the tank inclined towards the part to be sealed, which can better facilitate the replenishment of grease. Attached Figure Description

[0020] Figure 1 This is an overall schematic diagram of the first embodiment;

[0021] Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle;

[0022] Figure 3 This is a schematic diagram of the piston seal ring in the first embodiment;

[0023] Figure 4 yes Figure 3 Cross-sectional view of the piston seal ring;

[0024] Figure 5 yes Figure 4 Enlarged schematic diagram of part B;

[0025] Figure 6 This is an overall schematic diagram of the second embodiment;

[0026] Figure 7 This is a schematic diagram of the piston seal ring in the second embodiment;

[0027] Figure 8 yes Figure 6 Cross-sectional view of the piston seal ring.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Bottom shell; 2. Piston cylinder; 3. Piston seat; 4. Seal; 401. Sealing part; 402. Sealing mounting part; 5. Oil reservoir; 6. Moving part; 7. Guide surface; 8. Inclined surface; 9. Protruding edge. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0031] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] First embodiment:

[0033] An automatic oil storage piston sealing structure, such as Figures 1 to 5As shown, the device includes a sealing element 4 and a user device. The side of the user device facing the sealing element 4 is the part to be sealed. The sealing element 4 has a sealing part 401 and a sealing mounting part 402. The sealing element 4 is used to seal the part to be sealed. The sealing part 401 is in contact with the part to be sealed. Grease, specifically lubricating oil, is applied between the part to be sealed and the sealing part 401. The upper surface of the sealing part 401 is recessed inward to form an upward-facing oil storage groove 5, which communicates with the part to be sealed. The sealing mounting part 402 can be provided on the user device or can be set independently of the user device. The sealing mounting part 402 is used to install the sealing part 401, and the sealing part 401 slides in contact with the part to be sealed. By setting an automatic oil storage sealing structure, lubricating oil is ensured for a long time during the operation, ensuring smooth operation.

[0034] In this embodiment, a piston is used as the device. The piston is mounted on the bottom shell 1 of the pneumatic start assembly of the drain valve. The part to be sealed is the inner wall of the piston cylinder 2. An oil reservoir 5 is provided on the part of the sealing element that contacts the inner wall of the piston cylinder 2. The piston includes a piston seat 3 and a piston cylinder 2. The sealing part 401 is a piston sealing ring 4. The inner ring and / or outer ring of the piston sealing ring 4 are sealed and fitted with the piston seat 3. The inner ring and / or outer ring of the piston sealing ring 4 are relatively movable with respect to the inner wall of the piston cylinder 2. An oil reservoir 5 is provided on the end face or side wall of the piston sealing ring 4 that mates with the inner wall of the piston cylinder 2. In this embodiment, the inner ring of the piston sealing ring 4 is sealed and fitted with the piston seat 3, and the outer ring of the piston sealing ring 4 is relatively movable with respect to the inner wall of the piston cylinder 2. An oil reservoir 5 is provided on the end face or side wall of the outer ring of the piston sealing ring 4 that mates with the inner wall of the piston cylinder 2.

[0035] In this embodiment, the sealing mounting part 402 is an annular groove opened on the side wall of the piston seat 3. The sealing part 401 is snapped into the annular groove. The sealing part 401 is a sealing ring extending axially along one side of the sealing mounting part 402. In this embodiment, it is arranged to extend upward around the outer side of the sealing mounting part 402. The upper surface of the sealing ring is recessed inward to form an upward-facing oil storage groove 5. The oil storage groove 5 is an annular groove opened around the sealing ring, and the grease on the inner wall of the piston cylinder 2 can flow downward into the oil storage groove 5. The sealing ring gradually tilts inward from the groove opening to the groove bottom. When the sealing ring is subjected to a force from the groove opening to the groove bottom, that is, a force from top to bottom, the sealing ring flips outward. In this embodiment, the sealing ring is a sealing ring, and the sealing mounting part 402 and the piston seat 3 are integrally formed structures for snapping into the inner ring of the sealing ring.

[0036] The sealing part 401 slides in contact with the part to be sealed. In this embodiment, the opening of the piston cylinder 2 faces downward. The piston cylinder 2 can slide up and down relative to the piston sealing ring 4. The piston sealing ring 4 slides in contact with the inner wall of the piston cylinder 2. The piston sealing ring 4 remains stationary while the piston cylinder 2 moves.

[0037] When the oil reservoir 5 is subjected to a force from the opening to the bottom, the sealing part 401 applies oil to the area to be sealed, and when there is a large amount of grease, it can flow into the oil reservoir 5. That is, when the piston cylinder 2 moves downward, the piston sealing ring 4 can apply the grease in the oil reservoir 5 to the inner wall of the piston cylinder 2. When there is a large amount of grease on the cylinder wall, the grease can also be stored in the oil reservoir 5. In this embodiment, grease can be applied to both the oil reservoir and the inner wall of the piston cylinder 2 during use to ensure sufficient grease. Furthermore, during the idle time when the device is not in use, the grease on the inner wall of the piston cylinder 2 will flow downward and be stored in the oil reservoir 5, avoiding direct loss of grease and extending the lubrication time of the device.

[0038] A movable part 6 is provided between the oil reservoir 5 and the part to be sealed. The movable part 6 is the outer edge of the piston seal ring 4 located in the oil reservoir 5. When the oil reservoir 5 is subjected to a force from the opening to the bottom of the reservoir, that is, when the piston cylinder 2 moves downward, the outer edge of the piston seal ring 4 is deformed and flipped outward by the force. The movable part 6 flips the oil reservoir 5 outward, so that the oil reservoir 5 is closer to the inner wall of the piston cylinder 2, so that the oil in the oil reservoir 5 can flow to the part to be sealed to keep the part to be sealed lubricated, that is, to apply oil to the inner wall of the piston cylinder 2.

[0039] The side of the oil reservoir 5 closest to the part to be sealed slopes inward from the opening to the bottom, forming a guide surface 7. This guide surface 7 facilitates the flow of grease into the oil reservoir 5. Grease from the cylinder wall can flow along the sloped guide surface 7 to the bottom of the oil reservoir 5, and it also facilitates lubrication when the movable part 6 is turned outward, making oil replenishment convenient. Figure 4 As shown, the angle between the edge or tangent line of the oil reservoir 5 near the part to be sealed and the part to be sealed is 0°≤a<90°. When it is 0°, the outer side of the oil reservoir 5 is in a vertical state. Although the guiding effect is poor, it can still be used normally. In this embodiment, the angle between the tangent line of the outer side of the oil reservoir 5 and the vertical direction is a=14°. In other embodiments, a=45° is preferred.

[0040] The bottom of the oil storage tank 5 is located at point B, which is close to the part to be sealed. The distance from point C to the part to be sealed is greater than the distance from point D at the opening of the oil storage tank 5 to the part to be sealed. This makes the oil storage tank 5 shaped like an inverted "V" and the bottom of the tank inclined towards the part to be sealed, which can better facilitate the replenishment of grease.

[0041] The sealing part 401 has an inclined surface 8 on the side near the part to be sealed. The inclined surface 8 slopes inward from the opening of the oil reservoir 5 towards the bottom of the reservoir. The top of the inclined surface 8, i.e., the outer side of the piston seal ring 4, abuts against the cylinder wall, improving the sealing performance between the sealing part 401 and the part to be sealed. Figure 4As shown, the angle between the tangent line on the outer side of the sealing part 401 and the vertical direction is 0° < b < 90°. When the angle is 0°, the sealing part 401 can also play a normal sealing role, but the sealing effect is not as good as the inclined setting. In this embodiment, the angle between the tangent line on the outer side of the oil storage tank 5 and the vertical direction is b = 11°. In other embodiments, b = 15° is preferred.

[0042] The working process of this utility model is as follows:

[0043] When piston cylinder 2 moves upward, piston cylinder 2 moves along the inclined surface 8 of piston seal ring 4, and movable part 6 will not flip outward. Movable part 6 is only used for scraping oil. When piston cylinder 2 moves downward, since piston cylinder 2 moves against the inclined surface 8, movable part 6 will flip outward. Movable part 6 can be used for applying oil. When there is a lot of grease on the cylinder wall, the grease can also be stored in the oil reservoir 5. Or, during the idle time when the device is not running, the grease will flow downward and be stored in the oil reservoir 5, thus prolonging the lubrication time.

[0044] Second embodiment:

[0045] An automatic oil storage piston sealing structure, such as Figures 6 to 8 As shown, the difference from the first embodiment is that the opening of the piston cylinder 2 faces upward, and the piston sealing ring 4 can slide up and down relative to the piston cylinder 2. The piston cylinder 2 remains stationary while the piston sealing ring 4 moves. The sealing part 401 includes a sealing ring extending axially along one side of the sealing mounting part 402. In this embodiment, it is provided to extend downward around the outer side of the sealing mounting part 402, and a protruding edge 9 protruding radially outward along the sealing ring. The upper surface of the protruding edge 9 is recessed inward to form an oil storage groove 5 with an upward opening. Grease from the inner wall of the piston cylinder 2 flows downward and can be stored in the oil storage groove 5. When the sealing part 401 is subjected to a force from the groove opening to the groove bottom, the protruding edge 9 flips outward. In this embodiment, the sealing ring is a sealing ring, and the sealing mounting part 402 and the piston seat 3 are integrally formed structures for engaging the inner ring of the sealing ring.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A self-oiling piston seal structure, characterized by: The application relates to a sealing device and a device to be sealed, wherein the sealing device comprises a sealing part and a sealing installation part, the sealing part is used to seal a part to be sealed, the sealing part is in contact with the part to be sealed, grease is applied between the part to be sealed and the sealing part, the sealing part is provided with a grease storage groove, the grease storage groove is in communication with the part to be sealed, the sealing installation part is arranged on the device to be sealed or is independent of the device to be sealed, the sealing installation part is used to install the sealing part, and the sealing part and the part to be sealed are in sliding contact.

2. The self-oil-storing piston seal structure according to claim 1, characterized in that: The upper surface of the sealing part is inwardly recessed to form the grease storage groove with an opening facing upward.

3. A self-oiling piston seal according to claim 2, wherein: The grease storage groove is provided with a movable part between the grease storage groove and the part to be sealed, when the grease storage groove is subjected to a force from the groove opening to the groove bottom, the movable part turns the grease storage groove outward, and the oil in the grease storage groove flows to the part to be sealed to keep the part to be sealed lubricated.

4. The self-oiling piston seal structure of claim 2, wherein: The sealing part comprises a sealing ring extending axially along one side of the sealing installation part, the upper surface of the sealing ring is inwardly recessed to form the grease storage groove with an opening facing upward, and the sealing ring gradually inclines inwardly along the direction from the groove opening to the groove bottom, so that the sealing ring turns outward when the sealing part is subjected to a force from the groove opening to the groove bottom.

5. The self-oiling piston seal structure of claim 1, wherein: The side of the grease storage groove close to the part to be sealed inclines inwardly along the direction from the groove opening to the groove bottom, so as to form a guide surface, and the guide surface can facilitate the flow of the grease into the grease storage groove.

6. The self-oiling piston seal structure of claim 1, wherein: The sealing part comprises a sealing ring extending axially along one side of the sealing installation part and a convex edge protruding radially outwardly along the sealing ring, the upper surface of the convex edge is inwardly recessed to form the grease storage groove with an opening facing upward, and the convex edge turns outward when the sealing part is subjected to a force from the groove opening to the groove bottom.

7. The self-oiling piston seal structure of claim 1, wherein: The device to be sealed is a piston, the part to be sealed is a piston cylinder wall, and the sealing part is provided with the grease storage groove at the part in contact with the piston cylinder wall.

8. A self-oiling piston seal according to claim 7, wherein: The piston comprises a piston seat and a piston cylinder, the sealing part is a piston sealing ring, the sealing installation part is arranged on the piston seat, the inner ring and / or the outer ring of the piston sealing ring is in sealing cooperation with the piston seat, the inner ring and / or the outer ring of the piston sealing ring is relatively movable with the piston cylinder wall, and the end face or the side wall of the piston sealing ring in cooperation with the piston cylinder wall is provided with the grease storage groove.

9. A self-oiling piston seal according to any one of claims 1 to 8, wherein: The side of the groove bottom C of the grease storage groove close to the part to be sealed is provided with a distance greater than the distance from the groove opening D of the grease storage groove to the part to be sealed.

10. A self-oiling piston seal according to any one of claims 1 to 8, wherein: The angle a between the side of the grease storage groove close to the part to be sealed or the tangent line and the part to be sealed is less than 90 degrees.

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