Mechanical sealing element for centrifugal pump
By using an electric telescopic rod and pressure plate assembly in the centrifugal pump, combined with an internal gear and inclined block design, the problem of improper seal installation is solved, ensuring a stable seal installation and improving the sealing performance and service life of the centrifugal pump.
Patent Information
- Application Number
- CN202520168857.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-01-24
AI Technical Summary
Existing centrifugal pumps are prone to deviations when installing seals, which can lead to decreased sealing performance, loosening of seals, and compromised sealing effectiveness.
The pressing assembly includes a second electric telescopic rod and a pressing plate. The electric telescopic rod drives the pressing plate to squeeze the main body of the seal into the centrifugal pump seal mounting body. The design of the electric telescopic rod, internal gear and sliding groove ensures that the seal is fully installed in place, and the seal is stabilized by the cooperation of the inclined block and spring.
It effectively prevents improper installation of seals, improves the sealing effect of seals, and ensures long-term stable operation.
Smart Images
Figure CN223648113U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to mechanical seal technical field, concretely relates to mechanical seal spare for centrifugal pump. BACKGROUND
[0002] Mechanical seal spare for centrifugal pump is a kind of key shaft seal device, mainly used to prevent the fluid leakage in pump, and avoid the external pollutants into pump, in industrial production and equipment operation, mechanical seal of centrifugal pump plays a vital role, compared with traditional soft packing seal, mechanical seal has longer service life, lower friction power consumption and more stable sealing performance;
[0003] But in the prior art in use, centrifugal pump may appear deviation in the manual installation of sealing element process when installing sealing element, lead to sealing performance decline, if sealing element is not installed in place, sealing element may appear loose in the subsequent use centrifugal pump work process, affect the sealing effect of sealing element, in view of this, we propose mechanical seal spare for centrifugal pump. UTILITY MODEL CONTENTS
[0004] The utility model discloses a mechanical seal spare for centrifugal pump, which solves the above-mentioned shortcomings and provides a mechanical seal spare for centrifugal pump.
[0005] To achieve the above object, the utility model provides mechanical seal spare for centrifugal pump, including centrifugal pump sealing element installation body and fixed shaft, the sealing element main body needs to be installed in the middle of centrifugal pump sealing element installation body and fixed shaft, the inside of centrifugal pump sealing element installation body is equipped with pressing assembly, and the pressing assembly is used to press the sealing element main body in the inside of centrifugal pump sealing element installation body, the pressing assembly includes second electric telescopic handle and pressing plate, the second electric telescopic handle drives the pressing plate and extrudes the sealing element main body, and the sealing element main body is extruded to the deep place of the inside cavity of centrifugal pump sealing element installation body.
[0006] As a further improvement of the technical solution, the fixed shaft is provided with an installation column outside the shaft center, two sliding grooves are symmetrically arranged outside the installation column, a first electric telescopic rod is fixedly connected to the inner wall of each sliding groove, a sliding block is fixedly connected to the end of the first electric telescopic rod, the outer wall of the sliding block is slidably connected to the inner wall of the sliding groove, an open sliding groove is arranged outside the sliding block, a second electric telescopic rod is fixedly connected to the inner wall of the open sliding groove, a pressing plate is fixedly connected to the end of the second electric telescopic rod, the outer side of the pressing plate is attached to the outer side of the sealing element main body, and the outer wall of the pressing plate is slidably connected to the inner wall of the open sliding groove.
[0007] As a further improvement to this technical solution, an internal gear is fixedly connected to the end of the mounting column, and three first gears mesh with the inner wall of the internal gear. A second gear meshes between the three first gears, and the axis of the second gear is fixedly connected to the axis of the end of the fixed shaft.
[0008] As a further improvement to this technical solution, multiple mounting blocks are uniformly fixedly connected to the outer side of the sealing element body. Each of the mounting blocks has a square groove on its surface. A spring is fixedly connected to the inner wall of the square groove. An inclined block is fixedly connected to the end of the spring. The outer wall of the inclined block is slidably adapted to the inner wall of the square groove.
[0009] As a further improvement to this technical solution, the outer wall of the centrifugal pump seal mounting body is uniformly provided with multiple opening grooves, and the inner walls of the multiple opening grooves are all engaged and adapted to the outer wall of the inclined block.
[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0011] In this mechanical seal for centrifugal pumps, by placing the seal body between the centrifugal pump seal mounting body and the fixed shaft, the second electric telescopic rod is opened. The second electric telescopic rod drives the pressing plate to press the seal body into the depth of the centrifugal pump seal mounting body cavity, preventing the sealing effect of the seal body from being affected due to improper installation of the seal body. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0013] Figure 2 This is a schematic diagram of the sliding groove structure of this utility model;
[0014] Figure 3 This is a schematic diagram of the inclined block structure of this utility model;
[0015] Figure 4 This is a schematic diagram of the sliding block structure of this utility model;
[0016] Figure 5 This is a schematic diagram of the internal gear structure of this utility model.
[0017] The labels in the diagram represent the following: 1. Centrifugal pump seal mounting body; 10. Opening groove; 11. Fixed shaft; 2. Pressing assembly; 20. Mounting column; 201. Sliding groove; 202. Internal gear; 21. First electric telescopic rod; 22. Sliding block; 221. Opening sliding groove; 23. Second electric telescopic rod; 24. Pressing plate; 25. First gear; 26. Second gear; 27. Mounting block; 271. Square groove; 28. Spring; 29. Inclined block; 3. Seal body. Detailed Implementation
[0018] 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, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0019] Mechanical seals for centrifugal pumps are a key shaft sealing device, primarily used to prevent fluid leakage within the pump and to prevent external contaminants from entering the pump. In industrial production and equipment operation, mechanical seals play a crucial role in centrifugal pumps. Compared to traditional soft packing seals, mechanical seals have a longer service life, lower frictional power consumption, and more stable sealing performance. However, loosening or other issues can affect the sealing effect. Therefore, the specific procedure is as follows: The second electric telescopic rod 23 drives the pressing plate 24 to press against the seal body 3.
[0020] Please see Figures 1-5 As shown, this embodiment provides a mechanical seal for a centrifugal pump, including a centrifugal pump seal mounting body 1 and a fixed shaft 11. A seal body 3 needs to be installed between the centrifugal pump seal mounting body 1 and the fixed shaft 11. A pressing component 2 is provided inside the centrifugal pump seal mounting body 1. The pressing component 2 is used to press the seal body 3 inside the centrifugal pump seal mounting body 1. The pressing component 2 includes a second electric telescopic rod 23 and a pressing plate 24. When installing the seal, deviations may occur during manual installation, leading to a decrease in sealing performance. If the seal is not installed in place, it may squeeze the seal body 3 deep into the inner cavity of the centrifugal pump seal mounting body 1 during subsequent use of the centrifugal pump, preventing the seal body 3 from being improperly installed and affecting the sealing effect of the seal body 3.
[0021] The improvement in this embodiment is as follows:
[0022] Place the sealing body 3 between the centrifugal pump sealing mounting body 1 and the fixed shaft 11, open the second electric telescopic rod 23, and the second electric telescopic rod 23 drives the pressing plate 24 to press the sealing body 3, pressing the sealing body 3 into the depth of the centrifugal pump sealing mounting body 1, so as to prevent the sealing effect of the sealing body 3 from being affected due to improper installation of the sealing body 3.
[0023] To ensure that the pressing assembly 2 completely presses the sealing body 3 into the centrifugal pump sealing mounting body 1, a mounting post 20 is provided at the outer center of the fixed shaft 11. Two sliding grooves 201 are symmetrically provided on the outer side of the mounting post 20. A first electric telescopic rod 21 is fixedly connected to the inner wall of each sliding groove 201. A sliding block 22 is fixedly connected to the end of the first electric telescopic rod 21. The outer wall of the sliding block 22 slides and adapts to the inner wall of the sliding groove 201. An open sliding groove 221 is provided on the outer side of the sliding block 22. A second electric telescopic rod 23 is fixedly connected to the inner wall of the open sliding groove 221. A pressing plate 24 is fixedly connected to the end of the rod 23. The outer side of the pressing plate 24 is in contact with the outer side of the sealing body 3. The outer wall of the pressing plate 24 slides to fit the inner wall of the opening groove 221. The first electric telescopic rod 21 drives the sliding block 22 at its end to slide on the inner wall of the sliding groove 201 until the sliding block 22 slides out of the inner wall of the mounting column 20. The two second electric telescopic rods 23 are opened. The second electric telescopic rods 23 drive the pressing plate 24 at its end to slide out of the inner wall of the opening groove 221. The pressing plate 24 squeezes the sealing body 3 and squeezes the sealing body 3 into the centrifugal pump sealing mounting body 1.
[0024] Among them, the first electric telescopic rod 21 and the second electric telescopic rod 23 are devices that convert the rotational motion of the motor into the linear reciprocating motion of the push rod. The core components of the electric telescopic rod include the motor, the reduction gear worm gear, the screw, the nut, etc. The motor is the power source, which generates mechanical energy through electrical energy to drive the operation of the entire system. This is common knowledge to those skilled in the art and will not be elaborated here.
[0025] Considering that the pressing plate 24 does not press the sealing body 3 fully, an internal gear 202 is fixedly connected to the end of the mounting column 20. Three first gears 25 mesh on the inner wall of the internal gear 202, and a second gear 26 meshes between the three first gears 25. The shaft of the second gear 26 is fixedly connected to the shaft of the fixed shaft 11. The mounting column 20 drives the internal gear 202 below to rotate, and the internal gear 202 drives the three first gears 25 meshing on the inner wall to rotate. The three first gears 25 rotate on the outer wall of the second gear 26. The rotation of the mounting column 20 drives the pressing plate 24 to squeeze along the outside of the sealing body 3, ensuring that the outside of the sealing body 3 is squeezed in place.
[0026] To strengthen the connection between the sealing body 3 and the centrifugal pump sealing mounting body 1, multiple mounting blocks 27 are uniformly fixedly connected to the outer side of the sealing body 3. Each mounting block 27 has a square groove 271 on its surface. A spring 28 is fixedly connected to the inner wall of the square groove 271. An inclined block 29 is fixedly connected to the end of the spring 28. The outer wall of the inclined block 29 slides to fit the inner wall of the square groove 271. The elastic force of the spring 28 causes the inclined block 29 to pop out towards the outer wall of the mounting block 27. The inclined block 29 slides on the inner wall of the square groove 271.
[0027] Considering that the inclined block 29 needs to be locked in the inner wall of the centrifugal pump seal mounting body 1, the outer wall of the centrifugal pump seal mounting body 1 is evenly provided with multiple opening slots 10. The inner walls of the multiple opening slots 10 are all locked and matched with the outer wall of the inclined block 29. The outer wall of the inclined block 29 slides along the inner wall of the opening slot 10 and is locked in the inner wall of the opening slot 10, thus firmly locking the seal body 3 in the inner wall of the centrifugal pump seal mounting body 1.
[0028] In summary, the working principle of this solution is as follows:
[0029] In practical use, when the mechanical seal for a centrifugal pump requires installation of the seal body 3, the seal body 3 is placed between the centrifugal pump seal mounting body 1 and the fixed shaft 11. The two first electric telescopic rods 21 are opened, causing the sliding blocks 22 at their ends to slide against the inner wall of the sliding groove 201 until the sliding blocks 22 slide out of the inner wall of the mounting column 20. Then, the two second electric telescopic rods 23 are opened, causing the pressing plates 24 at their ends to slide out of the inner wall of the opening groove 221. The pressing plates 24 press against the seal body 3, pushing it into the centrifugal pump seal mounting body 1. The mounting column 20 is rotated, causing the lower internal gear 202 to rotate. The internal gear 202 then rotates the three first gears 25 meshing on the inner wall. The three first gears 25 rotate on the outer wall of the second gear 26. The rotation of the mounting column 20 drives the pressing plate 24 to press along the outer side of the sealing body 3, ensuring that the outer side of the sealing body 3 is pressed in place. When the sealing body 3 moves to the depth of the centrifugal pump sealing mounting body 1, when the inclined block 29 contacts the opening groove 10, the elastic force of the spring 28 drives the inclined block 29 to pop out towards the outer wall of the mounting block 27. The inclined block 29 slides on the inner wall of the square groove 271, and the outer wall of the inclined block 29 slides along the inner wall of the opening groove 10 and is stuck in the inner wall of the opening groove 10, firmly locking the sealing body 3 into the inner wall of the centrifugal pump sealing mounting body 1. This ensures that the sealing body 3 is installed as a whole between the centrifugal pump sealing mounting body 1 and the fixed shaft 11, preventing the sealing body 3 from being improperly installed and affecting the sealing effect of the sealing body 3.
[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A mechanical seal for a centrifugal pump, comprising a centrifugal pump seal mounting body (1) and a fixed shaft (11), characterized in that: A sealing body (3) needs to be installed between the centrifugal pump sealing mounting body (1) and the fixed shaft (11). The centrifugal pump sealing mounting body (1) is provided with a pressing assembly (2). The pressing assembly (2) is used to press the sealing body (3) inside the centrifugal pump sealing mounting body (1). The pressing assembly (2) includes a second electric telescopic rod (23) and a pressing plate (24). The second electric telescopic rod (23) drives the pressing plate (24) to press against the sealing body (3), pressing the sealing body (3) deep into the inner cavity of the centrifugal pump sealing mounting body (1).
2. The mechanical seal for a centrifugal pump according to claim 1, characterized in that: A mounting post (20) is provided at the outer center of the fixed shaft (11). Two sliding grooves (201) are symmetrically provided on the outer side of the mounting post (20). A first electric telescopic rod (21) is fixedly connected to the inner wall of each of the two sliding grooves (201). A sliding block (22) is fixedly connected to the end of the first electric telescopic rod (21). The outer wall of the sliding block (22) is slidably adapted to the inner wall of the sliding groove (201). An open sliding groove (221) is provided on the outer side of the sliding block (22). A second electric telescopic rod (23) is fixedly connected to the inner wall of the open sliding groove (221). A pressing plate (24) is fixedly connected to the end of the second electric telescopic rod (23). The outer side of the pressing plate (24) is in contact with the outer side of the sealing body (3). The outer wall of the pressing plate (24) is slidably adapted to the inner wall of the open sliding groove (221).
3. The mechanical seal for a centrifugal pump according to claim 2, characterized in that: An internal gear (202) is fixedly connected to the end of the mounting column (20). Three first gears (25) mesh with the inner wall of the internal gear (202). A second gear (26) meshes between the three first gears (25). The axis of the second gear (26) is fixedly connected to the axis of the end of the fixed shaft (11).
4. The mechanical seal for a centrifugal pump according to claim 1, characterized in that: Multiple mounting blocks (27) are uniformly fixedly connected to the outer side of the sealing body (3). Each mounting block (27) has a square groove (271) on its surface. A spring (28) is fixedly connected to the inner wall of the square groove (271). An inclined block (29) is fixedly connected to the end of the spring (28). The outer wall of the inclined block (29) slides and adapts to the inner wall of the square groove (271).
5. The mechanical seal for a centrifugal pump according to claim 4, characterized in that: The centrifugal pump seal mounting body (1) has a plurality of opening grooves (10) evenly provided on its outer wall, and the inner walls of the plurality of opening grooves (10) are all engaged and adapted to the outer wall of the inclined block (29).