Integrated automatic centering flexible shaft end dynamic seal

Abstract

The utility model discloses integrated automatic centering flexible shaft end dynamic sealing device relates to precision dynamic sealing piece industry technical field, including transmission screw, automatic centering block, compression adjusting ring, spray wear -resisting layer axle sleeve, adjusting nut, automatic pre -tight spring, flexible sealing material, filling mouth, actuating sealing ring, axle sleeve sealing ring, gland sealing ring, adjustable center distance gland, valve, transmission key, hold axle ware, spray wear -resisting layer axle sleeve outside sets hold axle ware, and hold axle ware is connected with spray wear -resisting layer axle sleeve transmission through transmission key, and adjustable center distance gland is correspondingly arranged with spray wear -resisting layer axle sleeve, in the utility model, the assembly has realized the promotion of sealing effect, can reach the sealing state of trace leakage even zero leakage, has changed the situation that traditional sealing mode is sealed invalid or leakage exceeds the standard under the complex working condition such as special medium, low speed, satisfies the demand of sealing precision in industrial production.

Description

Technical Field

[0001] This utility model relates to the technical field of precision dynamic sealing components, specifically to an integrated automatic centering flexible shaft end dynamic sealing device. Background Technology

[0002] In the dynamic sealing scenarios of shaft ends of industrial fluid transmission and mixing equipment, the industry widely adopts technical solutions such as braided packing, mechanical seals or labyrinth seals. These sealing methods provide basic sealing protection for equipment operation under normal working conditions and are the mainstream application forms in the field of shaft end sealing of current equipment.

[0003] In existing technologies, braided packing, mechanical seals, or labyrinth seals are widely used for dynamic sealing of shaft ends in industrial fluid transmission or mixing equipment. However, for many special media, such as materials with high viscosity like latex or gas-liquid mixtures, for applications with large shaft diameters where disassembly and assembly are extremely difficult, and for working conditions where the rotational speed is very slow and it is difficult for the liquid film of the mechanical seal on the end face to form, traditional packing seals or mechanical seals are difficult to achieve an effective dynamic sealing effect.

[0004] In view of the above, this application is hereby submitted. Utility Model Content

[0005] The purpose of this invention is to provide an integrated automatic centering flexible shaft end dynamic sealing device to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides an integrated automatic centering flexible shaft end dynamic sealing device, including a transmission screw, an automatic centering block, a compression adjusting ring, a wear-resistant sprayed bushing, an adjusting nut, an automatic pre-tightening spring, flexible sealing material, a filling port, an actuating sealing ring, a bushing sealing ring, a gland sealing ring, an adjustable center distance gland, a valve, a transmission key, and a shaft clamp.

[0007] Furthermore, a shaft clamp is fitted on the outside of the wear-resistant layer bushing. The shaft clamp is connected to the wear-resistant layer bushing via a transmission key. An adjustable center distance cover is arranged correspondingly to the wear-resistant layer bushing. Flexible sealing material is filled in the gap between the adjustable center distance cover and the wear-resistant layer bushing. An automatic centering block is located inside the adjustable center distance cover and is adapted to the outer wall of the wear-resistant layer bushing.

[0008] Furthermore, the compression adjusting ring is sleeved on the outside of the flexible sealing material, the adjusting nut is threadedly connected to the adjustable center distance gland, and one end of the adjusting nut abuts against the compression adjusting ring.

[0009] Furthermore, the transmission screw passes through the adjustable center distance gland, and the end of the transmission screw is connected to the shaft clamp to achieve the transmission cooperation between the two. The wear-resistant bushing, the adjustable center distance gland, the flexible sealing material, and the transmission mechanism composed of the transmission screw, the transmission key, and the shaft clamp are integrated and assembled into a whole before leaving the factory.

[0010] Furthermore, an automatic pre-tightening spring is installed inside the adjustable center distance gland, with one end of the automatic pre-tightening spring corresponding to the flexible sealing material to compensate for its pre-tightening force.

[0011] Furthermore, the filling port is connected to an adjustable center distance gland, and a valve is installed at the filling port to control the opening and closing of the filling port.

[0012] Furthermore, the actuating seal ring is located at the end of the flexible sealing material, the bushing seal ring is fitted on the outside of the bushing with the wear-resistant layer sprayed on, and the gland seal ring is located at the connection part of the adjustable center distance gland.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. The component achieves a significant improvement in sealing performance, enabling a sealing state with minimal or even zero leakage. This changes the situation where traditional sealing methods fail or leak excessively under complex working conditions such as special media and low speeds, thus meeting the sealing precision requirements in industrial production.

[0014] 2. The device adopts an integrated design, allowing all core components to undergo comprehensive commissioning and testing at the manufacturing plant. This calibrates the sealing performance and operating parameters to their optimal state, reducing reliability risks caused by operational errors and component compatibility issues during on-site installation. Simultaneously, the compact structural design further enhances overall stability, significantly reducing the probability of failure during long-term operation and improving the operational reliability and service life of the sealing device.

[0015] 3. The flexible sealing material used is matched with the wear-resistant sprayed bushing, and the wear on the shaft or bushing is almost negligible. This avoids the high replacement costs caused by wear of shaft components. In addition, the daily loss is only the extrusion of a very small amount of flexible sealing material, which greatly reduces material consumption costs. At the same time, it reduces material waste caused by seal failure, resulting in a decrease in overall operating costs.

[0016] 4. The integrated automatic centering structure simplifies the installation and commissioning process. It eliminates the need for complicated positioning and calibration procedures and can quickly achieve accurate installation with the help of the automatic centering function. This eliminates the high dependence on professional technicians and cumbersome installation steps of traditional sealing devices, greatly shortens the equipment downtime for installation and maintenance, and improves production efficiency.

[0017] 5. By optimizing the sealing structure and material combination, the device effectively reduces the frictional resistance between the sealing surfaces, thereby reducing the rotational torque and reducing the energy consumption required to drive the equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the integrated automatic centering flexible shaft end dynamic sealing device. Figure 2 This is an enlarged view of the compression adjusting ring in an integrated automatic centering flexible shaft end dynamic sealing device. Figure 3 This is an enlarged view of the automatic pre-tightening spring in an integrated automatic centering flexible shaft end dynamic sealing device. Figure 4 This is an enlarged view of the filling port in an integrated automatic centering flexible shaft end dynamic seal device.

[0019] In the diagram: 1. Transmission screw; 2. Automatic centering block; 3. Compression adjusting ring; 4. Wear-resistant sprayed bushing; 5. Adjusting nut; 6. Automatic pre-tightening spring; 7. Flexible sealing material; 8. Filling port; 9. Actuating seal ring; 10. Bushing seal ring; 11. Gland seal ring; 12. Adjustable center distance gland; 13. Valve; 14. Transmission key; 15. Shaft clamp. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-4This utility model provides a technical solution: an integrated automatic centering flexible shaft end dynamic sealing device, including a transmission screw 1, an automatic centering block 2, a compression adjusting ring 3, a wear-resistant sprayed bushing 4, an adjusting nut 5, an automatic pre-tightening spring 6, flexible sealing material 7, a filling port 8, an actuating sealing ring 9, a bushing sealing ring 10, a gland sealing ring 11, an adjustable center distance gland 12, a valve 13, a transmission key 14, and a shaft clamp 15. The shaft clamp 15 is fitted on the outside of the wear-resistant sprayed bushing 4, and the shaft clamp 15 is connected via... The transmission key 14 is connected to the wear-resistant sprayed bushing 4. The adjustable center distance pressure cover 12 is arranged correspondingly to the wear-resistant sprayed bushing 4. Flexible sealing material 7 fills the gap between the adjustable center distance pressure cover 12 and the wear-resistant sprayed bushing 4. The automatic centering block 2 is located inside the adjustable center distance pressure cover 12 and is adapted to the outer wall of the wear-resistant sprayed bushing 4. The wear-resistant sprayed bushing 4 serves as the core rotating base of the device. Its inner wall is in contact with the main shaft of the equipment, and its outer wall is sequentially equipped with a bushing seal ring 10, a shaft clamp 15, and flexible sealing material 7. The bushing surface is coated with a wear-resistant layer, which directly bears the sealing friction and media erosion. The shaft clamp 15 is sleeved at the middle position of the outer side of the wear-resistant sprayed bushing 4 and is circumferentially fixed to the bushing through the transmission key 14, realizing synchronous rotation of the two. Its outer side is connected to the end of the transmission screw 1 to receive the rotational power transmission.

[0022] See Figure 1 The compression adjusting ring 3 is sleeved on the outside of the flexible sealing material 7. The adjusting nut 5 is threadedly connected to the adjustable center distance cover 12, and one end of the adjusting nut 5 abuts against the compression adjusting ring 3. The flexible sealing material 7 is located in the sealing functional area of ​​the integrated automatic centering flexible shaft end dynamic sealing device, specifically filling the annular gap between the adjustable center distance cover 12 and the wear-resistant layer sleeve 4. It is the core functional material for achieving dynamic sealing effect. The compression adjusting ring 3 has an overall annular structure and is coaxially sleeved on the outside of the flexible sealing material 7. Its inner wall is tightly fitted with the outer wall of the flexible sealing material 7, and its outer wall is clearance-fitted with the inner wall of the adjustable center distance cover 12. It is located in the installation cavity formed by the adjustable center distance cover 12. The adjustable center distance cover 12, as an important base component of the device, has an internal thread structure on its inner wall near the flexible sealing material 7. This thread structure is adapted to the adjusting nut 5 and provides installation and movement support for the adjusting nut 5.

[0023] See Figures 1-4 The automatic pre-tightening spring 6 is installed inside the adjustable center distance pressure cover 12. The automatic pre-tightening spring 6 can compensate for the pre-tightening force reduction of the flexible sealing material 7 due to long-term wear, aging or fluctuations in operating conditions in real time. This ensures that the sealing material always maintains a tight fit with the wear-resistant sleeve 4 and the adjustable center distance pressure cover 12, avoiding leakage gaps due to insufficient pre-tightening force. It eliminates the need for frequent manual shutdowns to adjust the sealing pressure. The automatic compensation function of the automatic pre-tightening spring 6 reduces the ineffective wear of the flexible sealing material 7, reduces the frequency of sealing material replacement, and indirectly extends the operating cycle of the entire sealing device.

[0024] See Figures 1-4 The filling port 8 is connected to the adjustable center distance gland 12. The combination structure of the filling port 8 and the valve 13 allows the valve 13 to be opened to replenish the flexible sealing material 7 during normal equipment operation. The sealing performance can be restored without stopping the machine and disassembling the equipment, which greatly reduces the production loss caused by downtime. When the sealing effect of the flexible sealing material 7 decreases due to wear and aging, the material can be accurately replenished through the filling port 8 without replacing the entire sealing component, reducing the consumption cost of sealing material and extending the operating cycle of the entire sealing device. The valve 13 can flexibly control the opening and closing of the filling port 8. When no material needs to be replenished, the valve 13 can be closed to effectively prevent the internal medium of the equipment from leaking through the filling port 8, avoiding the safety hazards and environmental pollution caused by the overflow of the medium. At the same time, it prevents external impurities from entering the sealing cavity through the filling port 8 and affecting the sealing effect.

[0025] See Figures 1-4 The actuating seal ring 9 is located at the end of the flexible sealing material 7, the bushing seal ring 10 is sleeved on the outside of the sprayed wear-resistant layer bushing 4, and the gland seal ring 11 is located at the connection part of the adjustable center distance gland 12. The actuating seal ring 9, the bushing seal ring 10 and the gland seal ring 11 form a multi-dimensional sealing protection, which respectively seals key leakage risk points such as the end of the flexible sealing material 7, the connection between the sprayed wear-resistant layer bushing 4 and the equipment, and the connection part of the adjustable center distance gland 12, greatly reducing the probability of media leakage.

[0026] Working principle: The inner wall of the wear-resistant sprayed sleeve 4 fits against the main shaft of the equipment. When the main shaft rotates, it directly drives the wear-resistant sprayed sleeve 4 to rotate synchronously. The shaft clamp 15 is circumferentially fixed to the wear-resistant sprayed sleeve 4 through the transmission key 14, realizing the synchronous movement of the core rotating component of the device and the fixed base, avoiding relative sliding and damage to the sealing surface. The automatic centering block 2 on the inner side of the adjustable center distance pressure cover 12 is adapted to the outer wall of the wear-resistant sprayed sleeve 4. The automatic centering block 2 forms a radial constraint on the sleeve, guiding the wear-resistant sprayed sleeve 4 and the adjustable center distance pressure cover 12 to keep coaxial, ensuring uniform sealing gap. The wear-resistant layer on the surface of the wear-resistant sprayed sleeve 4 directly bears the sealing friction and media erosion, reducing the probability of component damage. The internal thread at the end of the adjustable center distance pressure cover 12 is adapted to the adjusting nut 5. Rotating the adjusting nut 5 can make it move axially, pushing the compression adjusting ring 3 sleeved on the outside of the flexible sealing material 7, uniformly transmitting the axial force to the flexible sealing material 7, and adjusting the sealing pressure to adapt to different working conditions.

[0027] When the sealing effect decreases due to the consumption of flexible sealing material 7, the valve 13 at the filling port 8 can be opened to accurately replenish the sealing gap without stopping the equipment, thus restoring the sealing performance. After replenishment, the valve 13 is closed to prevent internal media leakage and external impurities from entering, ensuring the cleanliness of the sealing cavity.

[0028] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An integrated automatic centering flexible shaft end dynamic sealing device, characterized in that: The assembly includes a transmission screw (1), an automatic centering block (2), a compression adjusting ring (3), a wear-resistant sprayed bushing (4), an adjusting nut (5), an automatic pre-tightening spring (6), a flexible sealing material (7), a filling port (8), an actuating sealing ring (9), a bushing sealing ring (10), a gland sealing ring (11), an adjustable center distance gland (12), a valve (13), a transmission key (14), and a shaft clamp (15). The wear-resistant sprayed bushing (4) is fitted with a shaft clamp (15) on its outer side. The shaft clamp (15) is connected to the wear-resistant sprayed bushing (4) via the transmission key (14). The adjustable center distance gland (12) is arranged correspondingly to the wear-resistant sprayed bushing (4). The flexible sealing material (7) fills the gap between the adjustable center distance gland (12) and the wear-resistant sprayed bushing (4). The automatic centering block (2) is located inside the adjustable center distance gland (12) and is adapted to the outer wall of the wear-resistant sprayed bushing (4).

2. The integrated automatic centering flexible shaft end dynamic sealing device as described in claim 1, characterized in that: The compression adjustment ring (3) is sleeved on the outside of the flexible sealing material (7), the adjustment nut (5) is threadedly connected to the adjustable center distance pressure cap (12), and one end of the adjustment nut (5) abuts against the compression adjustment ring (3).

3. The integrated automatic centering flexible shaft end dynamic sealing device as described in claim 1, characterized in that: The automatic pre-tightening spring (6) is installed inside the adjustable center distance pressure cover (12), and one end of the automatic pre-tightening spring (6) is correspondingly set with the flexible sealing material (7) to compensate for its pre-tightening force.

4. The integrated automatic centering flexible shaft end dynamic sealing device as described in claim 1, characterized in that: The filling port (8) is connected to the adjustable center distance pressure cap (12), and the valve (13) is installed at the filling port (8) and controls the opening and closing of the filling port.

5. The integrated automatic centering flexible shaft end dynamic sealing device as described in claim 1, characterized in that: The actuating seal ring (9) is located at the end of the flexible sealing material (7), the bushing seal ring (10) is sleeved on the outside of the sprayed wear-resistant bushing (4), and the gland seal ring (11) is located at the connection part of the adjustable center distance gland (12).

6. The integrated automatic centering flexible shaft end dynamic sealing device as described in claim 1, characterized in that: The transmission screw (1) is inserted through the adjustable center distance cover (12). The end of the transmission screw (1) is connected to the shaft clamp (15) to achieve the transmission cooperation between the two. The wear-resistant sprayed bushing (4), the adjustable center distance cover (12), the flexible sealing material (7) and the transmission mechanism composed of the transmission screw (1), the transmission key (14) and the shaft clamp (15) are integrated and assembled into a whole before leaving the factory.

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