A sealing structure

Abstract

The application provides a sealing structure in the technical field of pump body maintenance, which comprises a pressing part, a first telescopic sealing part, a sealing seat and a lifting seat. The sealing seat is moved by the lifting seat. When the sealing seat is raised to the position of abutting the pressing part, the sealing part is sealed with the pressing part to prevent the liquid in the pump from leaking along the shaft. Then, the first telescopic sealing part is abutted with the pressing part to further improve the sealing property and prevent the liquid from leaking along the shaft, and the sealing effect is good. The first telescopic sealing part is abutted with the pressing part to ensure that the sealing seat and the pressing part can be sealed even if the sealing seat is not abutted with the lower surface of the pressing part, the liquid is further prevented from leaking along the shaft, and the sealing is reliable. The pressing part is installed to the specified position of the rotor, the sealing seat is moved by the lifting seat, the sealing seat is sealed with the pressing part, the pressing part is limited, the sealing effect at the specified position of the rotor is realized, the accuracy of the sealing position is improved, and the sealing effect is improved.

Description

Technical Field

[0001] This invention belongs to the field of pump body maintenance technology, and specifically relates to a sealing structure. Background Technology

[0002] Vertical pumps are machines used to transport or pressurize fluids. During operation, a mechanical seal or packing seal is generally required between the rotor and stator. Under normal operating conditions, the mechanical seal or packing seal is sufficient to meet the requirements. However, when the unit is under maintenance, the mechanical seal or packing seal needs to be replaced. At this time, the mechanical seal or packing seal needs to be opened, losing its sealing function, and water inside the pump will leak axially. Therefore, a temporary seal is required to prevent the pump's working environment from being compromised.

[0003] Currently, during online maintenance of large vertical pumps, most systems employ pneumatic rubber seals. Air is injected through the inflation port, causing the rubber ring around the rotor to expand. The expanded rubber ring fills the gap between the rotor and stator, achieving a seal. However, when sealing is required at specific locations, the rubber seal is difficult to position accurately, resulting in poor sealing performance and failing to meet the requirements of different operating conditions and media. Summary of the Invention

[0004] To address the problems of inaccurate positioning and poor sealing performance of rubber seals when sealing at specific locations in existing technologies, this invention provides a sealing structure. A lifting seat moves the sealing seat, and a pressing part limits its movement, enabling the sealing seat to be positioned precisely and sealed at the designated location. This structure meets the requirements of various operating conditions and media, and offers high reliability. The specific technical solution is as follows: A sealing structure includes: a pressing part, a first telescopic sealing part, a sealing seat, and a lifting seat; the pressing part is disposed on a rotor; the first telescopic sealing part wraps around the outer side of the pressing part along its circumference, and at least a portion of the first telescopic sealing part is in contact with the outer wall of the pressing part; the sealing seat is disposed on the outer side of the first telescopic sealing part along its circumference, and is sealed to the first telescopic sealing part, and is used to seal the pressing part; the lifting seat is disposed on the outer side of the first telescopic sealing part along its circumference, and is sealed to the first telescopic sealing part and the sealing seat, and is used to drive the sealing seat to move axially along the rotor.

[0005] In addition, the sealing structure in the above-mentioned technical solution provided by the present invention may also have the following additional technical features: Optionally, the pressing part includes: a mounting part and a contact part; the mounting part is detachably disposed on the rotor, and the outer side wall of the mounting part is in contact with the first telescopic seal part; the contact part is disposed on the mounting part along the circumference of the mounting part.

[0006] Optionally, the sealing structure further includes a receiving groove; the receiving groove is disposed circumferentially on the end face of the sealing seat near the pressing part, and the shape of the receiving groove is adapted to the shape of the contact part.

[0007] Optionally, the lifting seat includes: a base and a drive assembly; the base is disposed circumferentially on the outside of the first telescopic sealing part along the pressing part, and the base is sealed to the first telescopic sealing part; the drive assembly is disposed around the outside of the first telescopic sealing part, and the drive assembly is sealed to both the base and the sealing seat, and the drive assembly is used to drive the sealing seat to lift.

[0008] Optionally, the drive assembly includes: a mounting base, a second telescopic seal, and a lifting device; the mounting base is disposed on the base along the circumference of the pressing part; the second telescopic seal is disposed along the circumference of the pressing part, and the second telescopic seal is simultaneously sealed to both the sealing seat and the mounting base; the lifting device is embedded in the second telescopic seal, and the lifting device is used to drive the sealing seat to move axially along the rotor.

[0009] Optionally, the drive component includes: a vent; the vent is mounted on the mounting base and is connected to the lifting device, and is used to drive the lifting device to extend and retract.

[0010] Optionally, the sealing structure further includes a limiting part; the limiting part is disposed between the mounting base and the sealing part, the limiting part is connected to the mounting base, and the limiting part is used to limit the sealing base.

[0011] Optionally, the second telescopic sealing part includes: a first sealing sleeve and a second sealing sleeve; the first sealing sleeve is wrapped around the outside of the first telescopic sealing part and is sealed to the sealing seat and the mounting seat; the second sealing sleeve is wrapped around the outside of the first sealing sleeve and is sealed to the sealing seat and the mounting seat; wherein, the lifting device is disposed in the cavity enclosed by the first sealing sleeve, the second sealing sleeve and the mounting seat.

[0012] Optionally, the first sealing sleeve is an elastomer; the second sealing sleeve is an elastomer.

[0013] Optionally, the first sealing sleeve is a rubber body; the second sealing sleeve is a rubber body.

[0014] The sealing structure of the present invention has the following advantages compared with the prior art: This sealing structure uses a lifting seat to move the sealing seat and a pressing part to limit its movement. This allows the sealing seat to be positioned and sealed at a designated location, preventing leakage of liquid from the pump along the shaft and ensuring high reliability. At the same time, the first telescopic sealing part does not affect the movement of the sealing seat and can assist the sealing seat in sealing, achieving a double sealing effect. This improves the overall sealing performance of the sealing structure and can meet the needs of different working conditions and media. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a sealing structure according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the second telescopic sealing part of a sealing structure according to an embodiment of the present invention; in, Figures 1 to 2 The correspondence between the reference numerals and component names in the attached drawings is as follows: 10. Pressing part; 101. Mounting part; 102. Contact part; 11. First telescopic sealing part; 12. Sealing seat; 13. Lifting seat; 131. Base; 132. Drive assembly; 1321. Mounting seat; 1322. Second telescopic sealing part; 1322a. First sealing sleeve; 1322b. Second sealing sleeve; 1323. Lifting device; 1324. Vent; 14. Receiving groove; 15. Limiting part. Detailed Implementation

[0016] In the description of this application, it should 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", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0018] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 invention according to the specific circumstances.

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] See also Figures 1-2 As shown, according to an embodiment of this application, a sealing structure is provided, comprising: a pressing part 10, a first telescopic sealing part 11, a sealing seat 12, and a lifting seat 13; the pressing part 10 is disposed on a rotor; the first telescopic sealing part 11 wraps around the outside of the pressing part 10 along its circumference, and at least a portion of the first telescopic sealing part 11 is in contact with the outer wall of the pressing part 10; the sealing seat 12 is disposed around the outside of the first telescopic sealing part 11 along its circumference, and the sealing seat 12 is sealed to the first telescopic sealing part 11, and is used to seal the pressing part 10; the lifting seat 13 is disposed around the outside of the first telescopic sealing part 11 along its circumference, and the lifting seat 13 is sealed to the first telescopic sealing part 11 and the sealing seat 12, and is used to drive the sealing seat 12 to move axially along the rotor. A sealing structure is formed by sealing the lifting seat 13, the sealing seat 12, and the first telescopic sealing part 11 together. The lifting seat 13 drives the sealing seat 12 to move, and the first telescopic sealing part 11 extends as the sealing seat 12 rises. When the sealing seat 12 rises to a position where it fits against the pressing part 10, the sealing part and the pressing part 10 seal, preventing liquid leakage along the shaft from the pump. The first telescopic sealing part 11 then fits against the pressing part 10, further improving the sealing performance and preventing axial leakage, resulting in a good sealing effect. The first telescopic sealing part 11 fits against the pressing part 10 to ensure that even if the sealing seat 12 is not in contact with the lower surface of the pressing part 10, a seal can still be formed between the sealing seat 12 and the pressing part 10, further preventing liquid leakage along the shaft, ensuring a reliable seal. By installing the pressing part 10 to the designated position of the rotor, and then using the lifting seat 13 to drive the sealing seat 12 to move, the sealing seat 12 and the pressing part 10 are sealed. By limiting the pressing part 10, the sealing effect at a specific position on the rotor is achieved, improving the accuracy of the sealing position and enhancing the sealing effect to meet the usage requirements of different working conditions.

[0021] Furthermore, the first telescopic sealing part 11 adopts a bellows structure to ensure that at least part of the tube body can fit against the outer wall of the pressing part 10 when the first telescopic sealing part 11 is extended and shortened, thus avoiding leakage and ensuring a reliable structure.

[0022] In one embodiment, the mounting portion 101 is detachably mounted on the rotor, and the outer wall of the mounting portion 101 is in contact with the first telescopic seal portion 11; the contact portion 102 is disposed on the mounting portion 101 circumferentially. The first telescopic seal portion 11 is used to seal the mounting portion 101. When the lifting seat 13 drives the sealing seat 12 to rise, the sealing seat 12 and the contact portion 102 are in contact to perform a sealing function, preventing liquid leakage inside the pump body, and the sealing effect is good.

[0023] Specifically, the first telescopic sealing part 11 is a metal bellows. The minimum inner diameter of the metal bellows is equal to the outer diameter of the mounting part 101 to ensure the sealing performance of the first telescopic sealing part 11.

[0024] The receiving groove 14 is disposed along the circumference of the sealing seat 12 on the end face of the sealing seat 12 near the pressing part 10, and the shape of the receiving groove 14 is adapted to the shape of the contact part 102. By embedding the contact part 102 into the receiving groove 14 of the sealing seat 12 and making the two contact surfaces fit tightly together, the contact area between the pressing part 10 and the sealing seat 12 is increased, the sealing width is increased, and the sealing effect is improved.

[0025] Furthermore, inclined surfaces are provided on the contact portion 102 and inside the receiving groove 14 to guide the sealing action of the sealing seat 12, ensuring that the sealing seat 12 fits tightly with the pressing portion 10 after it moves into place, thereby further improving the sealing effect.

[0026] In another embodiment, the base 131 is disposed circumferentially around the first telescopic sealing part 11 on the outside of the pressing part 10, and the base 131 is sealed to the first telescopic sealing part 11; the drive assembly 132 is disposed around the outside of the first telescopic sealing part 11, and the drive assembly 132 is sealed to both the base 131 and the sealing seat 12, and is used to drive the sealing seat 12 to rise and fall. The base 131 is mounted on the pressing part 10 and sealed to the first telescopic sealing part 11 to fix the position of the base 131; the drive assembly 132 is mounted on the base 131 to ensure that when the drive assembly 132 is activated, the position of the base 131 does not change, and only the sealing seat 12 is driven to rise, thereby ensuring that the sealing seat 12 and the pressing part 10 are tightly fitted in the preset position, avoiding the problem of the sealing seat 12 not moving to the correct position, resulting in a gap between the sealing seat 12 and the pressing part 10, improving the reliability of the structure, and ensuring the sealing effect of the sealing seat 12.

[0027] Mounting base 1321 is disposed on base 131 along the circumference of pressing part 10; second telescopic seal is disposed along the circumference of pressing part 10, and second telescopic seal 1322 is simultaneously sealed to sealing seat 12 and mounting base 1321; lifting device 1323 is embedded in second telescopic seal 1322, and lifting device 1323 is used to drive sealing seat 12 to move axially along rotor. The lifting device 1323 is connected to mounting base 1321, and when the lifting device 1323 is raised, it can lift sealing seat 12, so that sealing seat 12 seals with pressing part 10. Second telescopic seal is fitted onto the outside of lifting device 1323, so that a sealed chamber is formed between mounting base 1321, sealing part and second telescopic seal 1322, preventing liquid from entering the pump and ensuring sealing effect.

[0028] A vent 1324 is provided on the mounting base 1321 and is connected to the lifting device 1323. The vent 1324 is used to drive the lifting device 1323 to extend or retract. By providing a vent 1324 on the mounting base 1321 and connecting the vent 1324 to the lifting device 1323, the second telescopic sealing part 1322 can be pneumatically driven to expand or contract, thereby driving the sealing seat 12 to rise or fall. Then, the pressing part 10 limits the sealing seat 12 to ensure that the sealing part moves to the accurate position, improving the reliability of the seal.

[0029] A limiting part 15 is disposed between the mounting base 1321 and the sealing part. The limiting part 15 is connected to the mounting base 1321 and is used to limit the sealing base 12. By setting the limiting part below the sealing base 12 for limiting and supporting, when the lifting device 1323 is depressurized, the second telescopic sealing part 1322 automatically resets under the gravity of the sealing base 12, ensuring that the second telescopic sealing part returns to its initial position. This facilitates control of the input inflation volume, eliminates the need for repeated trials, and improves operational efficiency.

[0030] It should be noted that when the inflation speed and inflation volume are constant, the inflation pressure is a fixed value. By installing a pressure gauge at the air vent 1324, it is easy to observe and adjust the inflation speed, thereby improving the convenience of operation.

[0031] The first sealing sleeve 1322a is wrapped around the outside of the first telescopic sealing part 11, and is sealed to the sealing seat 12 and the mounting seat 1321. The second sealing sleeve 1322b is wrapped around the outside of the first sealing sleeve 1322a, and is sealed to the sealing seat 12 and the mounting seat 1321. The lifting device 1323 is disposed in the cavity enclosed by the first sealing sleeve 1322a, the second sealing sleeve 1322b, and the mounting seat 1321. By sealing the first sealing sleeve 1322a and the second sealing sleeve 1322b with the mounting seat 1321 and the sealing seat 12, the lifting device 1323 is ensured to be in a sealed cavity, avoiding direct contact with liquid and extending its service life.

[0032] The first sealing sleeve 1322a and the second sealing sleeve 1322b are both elastic bodies. By making the first sealing sleeve 1322a and the second sealing sleeve 1322b elastic bodies, they deform under the action of the sealing seat 12, thereby preventing the second telescopic sealing part 1322 from separating from the mounting seat 1321, ensuring the sealing performance of the second telescopic sealing part 1322, and preventing air leakage. That is, after the second telescopic sealing part 1322 is inflated, its volume increases, lifting the sealing seat 12 and making the sealing seat 12 fit tightly with the pressing part 10; it also ensures that after depressurization, the second telescopic sealing part 1322 can quickly reset under the gravity of the sealing seat 12, improving the continuity of operation and increasing work efficiency.

[0033] It should be noted that by inflating the first sealing sleeve 1322a and the second sealing sleeve 1322b to deform them, the sealing seat 12 can also be lifted. That is, the first sealing sleeve 1322a and the second sealing sleeve 1322b can be used simultaneously with the lifting device 1323, or they can be used separately.

[0034] The first sealing sleeve 1322a and the second sealing sleeve 1322b are both made of rubber. By making the first sealing sleeve 1322a and the second sealing sleeve 1322b rubber, a rubber cavity is formed between the second telescopic sealing part 1322, the mounting seat 1321 and the sealing seat 12 when inflated. This provides good sealing performance and allows for easy elastic deformation, enabling the sealing part to be quickly lifted up, resulting in timely and efficient sealing.

[0035] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0036] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A sealing structure, characterized in that, The sealing structure includes: A pressing part, wherein the pressing part is disposed on the rotor; A first telescopic sealing part is wrapped around the outer side of the pressing part along the circumference of the pressing part, and at least a portion of the first telescopic sealing part is in contact with the outer side wall of the pressing part; A sealing seat is disposed circumferentially on the outside of the first telescopic sealing part along the pressing part, and the sealing seat is sealed to the first telescopic sealing part. The sealing seat is used to seal the pressing part. A lifting seat is provided on the outside of the first telescopic sealing part along the circumference of the pressing part. The lifting seat is sealed to the first telescopic sealing part and the sealing seat. The lifting seat is used to drive the sealing seat to move along the axial direction of the rotor. The lifting platform includes: A base is disposed circumferentially on the outside of the first telescopic sealing part along the pressing part, and the base is sealed to the first telescopic sealing part. A drive assembly is disposed around the outside of the first telescopic sealing portion, and the drive assembly is simultaneously sealed to the base and the sealing seat. The drive assembly is used to drive the sealing seat to rise and fall. The driving component includes: Mounting base, which is disposed on the base along the circumference of the pressing part; The second telescopic sealing part is arranged circumferentially along the pressing part, and the second telescopic sealing part is simultaneously sealed to the sealing seat and the mounting seat. A lifting device is embedded in the second telescopic seal and is used to drive the seal seat to move axially along the rotor.

2. The sealing structure according to claim 1, characterized in that, The pressing part includes: The mounting part is detachably mounted on the rotor, and the outer side wall of the mounting part is in contact with the first telescopic sealing part; A contact portion is provided on the mounting portion along the circumferential direction of the mounting portion.

3. The sealing structure according to claim 2, characterized in that, The sealing structure further includes: A receiving groove is provided along the circumference of the sealing seat on the end face of the sealing seat near the pressing part, and the shape of the receiving groove is adapted to the shape of the contact part.

4. A sealing structure according to claim 1, characterized in that, The driving component includes: A vent is provided on the mounting base and is connected to the lifting device. The vent is used to drive the lifting device to extend and retract.

5. A sealing structure according to claim 4, characterized in that, The sealing structure further includes: A limiting part is provided between the mounting base and the sealing part, the limiting part is connected to the mounting base, and the limiting part is used to limit the sealing base.

6. A sealing structure according to claim 4, characterized in that, The second telescopic seal includes: A first sealing sleeve is wrapped around the outside of the first telescopic sealing part, and the first sealing sleeve is sealed to the sealing seat and the mounting seat. The second sealing sleeve is wrapped around the outside of the first sealing sleeve, and the second sealing sleeve is sealed to the sealing seat and the mounting seat. The lifting device is disposed within the cavity enclosed by the first sealing sleeve, the second sealing sleeve, and the mounting base.

7. A sealing structure according to claim 6, characterized in that: The first sealing sleeve is an elastomer; The second sealing sleeve is an elastomer.

8. A sealing structure according to claim 7, characterized in that: The first sealing sleeve is a rubber body; The second sealing sleeve is a rubber body.

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