Water pump shaft seal circulating cooling device

Abstract

The utility model relates to the technical field of shaft seal water pump devices, and discloses a water pump shaft seal circulating cooling device which comprises a pump body, the front end of the pump body is in threaded connection with a dustproof plate, a heat dissipation mechanism is arranged on the inner wall of the dustproof plate and used for dissipating heat during long-time operation, and a stabilizing mechanism is arranged on the inner wall of the pump body. The heat dissipation mechanism comprises a protection shell, the outer wall of the protection shell is fixedly connected to the inner wall of the dustproof plate, multiple limiting grooves are formed in the upper end and the lower end of the inner wall of the protection shell, fins are fixedly connected to the inner walls of the multiple limiting grooves, and an injection hole is formed in the right side of the top of the outer wall of the protection shell. Cooling media can be conveniently injected through the funnel at the top of the protective shell, the heat exchange area is increased through the fins, the fan blades installed in cooperation with the connecting shaft fixing grooves rotate to accelerate airflow, hot air is exhausted through the transmission block heat dissipation holes, and the defect that in the prior art, the cooling effect is low is overcome.

Description

Technical Field

[0001] This utility model relates to the technical field of shaft seal water pump devices, and in particular to a water pump shaft seal circulating cooling device. Background Technology

[0002] The water pump shaft seal circulating cooling device is a heat dissipation and protection system specifically designed for water pump shaft seal components. It is widely used in various fluid transportation equipment such as industrial circulating pumps, feed water pumps, and fine brine pumps. During the operation of the water pump, the shaft seal, as a key sealing component connecting the rotating shaft and the fixed pump body, continuously generates heat due to the friction caused by the high-speed rotation of the shaft system. It is also affected by the temperature conduction of the transported medium. If the shaft seal temperature is too high, it will not only lead to accelerated wear of the sealing surface and aging and failure of the sealing material, causing medium leakage, but also reduce the fitting accuracy between the shaft seal and the shaft sleeve due to thermal stress. In severe cases, it may even cause the shaft seal to burn out and the pump body to stop. The core function of the water pump shaft seal circulating cooling device is to efficiently remove the heat generated by the shaft seal through the continuous circulation of the cooling medium, control the shaft seal operating temperature within a safe range, thereby ensuring the stable sealing performance of the shaft seal, extending the service life of the shaft seal, and ensuring the reliability and continuity of the overall operation of the water pump.

[0003] Early water pump shaft seal cooling devices mostly adopted a single-chamber cooling structure, mainly composed of a single cooling chamber, inlet pipe, return pipe, and ordinary water tank. This structure only achieved heat dissipation through the natural flow of the cooling medium within the cooling chamber. Due to the lack of flow guidance design inside the cooling chamber, the medium flow velocity was slow and the heat exchange path was short, resulting in extremely low cooling efficiency, which could not meet the heat dissipation requirements of high-speed, high-load water pump shaft seals. At the same time, early devices did not have filtration or monitoring components, and impurities in the cooling medium would accumulate at the contact surface between the cooling chamber and the shaft seal, aggravating shaft seal wear. Furthermore, it was impossible to monitor the cooling medium level and shaft seal temperature in real time, often leading to malfunctions due to insufficient medium or excessive temperature. To solve these problems, existing water pump shaft seal circulating cooling devices have gradually been optimized into multi-component collaborative structures, adding a dual-chamber cooling tank to achieve segmented cooling of the cooling medium, equipping filters to intercept impurities, and installing temperature sensors and level switches for real-time monitoring. Furthermore, some units also use demineralized water as the cooling medium to avoid scaling problems. These improvements effectively enhance cooling stability and reduce shaft seal damage caused by impurities or medium types. However, existing units still have significant drawbacks. On the one hand, to extend the heat exchange path of the cooling medium, a coil-type cooling structure is adopted. However, the coil needs to undergo multiple bending processes to fit the installation space of the pump body and cooling box. In actual assembly, not only is it necessary to accurately calibrate the docking position of the coil with the shaft seal and pipeline, but cracks may also occur at the bending points due to assembly stress. In long-term use, cracks will lead to leakage of the cooling medium, directly affecting the service life of the unit. On the other hand, the multiple bending of the coil will cause local eddies and resistance to be generated in the flow of the medium, reducing the medium circulation speed. Especially under high load conditions, the heat exchange efficiency drops significantly, and it is unable to quickly remove the large amount of heat generated by the shaft seal. The cooling effect is difficult to meet the requirements of harsh operating conditions. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a water pump shaft seal circulating cooling device, which aims to improve the problems of low cooling effect, multiple bends in the coil, and difficulty in actual assembly that affect service life in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a water pump shaft seal circulating cooling device, including a pump body, a dustproof plate is threadedly connected to the front end of the pump body, a heat dissipation mechanism is provided on the inner wall of the dustproof plate, the heat dissipation mechanism is used to dissipate heat during long-term operation, and a stabilizing mechanism is provided on the inner wall of the pump body.

[0006] The heat dissipation mechanism includes a protective shell, the outer wall of which is fixedly connected to the inner wall of the dustproof plate. Multiple limiting grooves are formed around the inner wall of the protective shell, and fins are fixedly connected to the inner walls of each limiting groove. A funnel is connected to the top of the outer wall of the protective shell. A connecting shaft is provided at the front end of the pump body, and multiple fixing grooves are formed on the outer wall of the connecting shaft. Fan blades are fixedly connected to the inner walls of each fixing groove. A transmission block is fixedly connected to the front side of the outer wall of the dustproof plate, and heat dissipation holes are formed on the outer wall of the transmission block.

[0007] As a further description of the above technical solution:

[0008] The stabilizing mechanism includes a rotating shaft, the front and rear ends of which are fixedly connected to the front and rear sides of the inner wall of the pump body, respectively. An angular contact ball bearing is rotatably connected to the front end of the outer wall of the rotating shaft. A buffer pad is fixedly connected to the front side of the first angular contact ball bearing. An angular contact ball bearing is fixedly connected to the front side of the buffer pad. A cylindrical roller bearing is rotatably connected to the rear side of the outer wall of the rotating shaft. A limit shaft is rotatably connected to the outer wall of the rotating shaft.

[0009] As a further description of the above technical solution:

[0010] The pump body has an output block threaded to its rear end on its outer wall, and an injection pipe is provided on the top right side of the outer wall of the dustproof plate.

[0011] As a further description of the above technical solution:

[0012] An injection tube is fixedly connected to the left side of the output block, and a pressure relief tube is connected to the right side of the injection tube.

[0013] As a further description of the above technical solution:

[0014] The top front side of the inner wall of the output block is connected to a transmission pipe, and the rear end of the transmission pipe is connected to the front side of the inner wall of the pressure relief pipe.

[0015] As a further description of the above technical solution:

[0016] The pump body has a fixed plate threaded to both the left and right sides of its outer wall, and a fixed base is fixedly connected to the bottom of its outer wall.

[0017] As a further description of the above technical solution:

[0018] The bottom front and rear sides of the output block are fixedly connected to brackets, and the rear end of the inner wall of the output block is rotatably connected to an output shaft.

[0019] As a further description of the above technical solution:

[0020] The output shaft is fixedly connected to a limiting sleeve at its rear end. Impeller 1 and impeller 2 are rotatably connected to the front and rear sides of the outer wall of the output shaft, respectively. A connector is provided at the front end of the connecting shaft.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, the funnel at the top of the protective shell facilitates the injection of cooling medium, the fins increase the heat exchange area, and the fan blades installed in the connecting shaft fixing groove accelerate the airflow, while the heat dissipation holes of the transmission block discharge hot air, forming a highly efficient heat dissipation system, significantly improving the cooling effect and solving the defect of low cooling effect in the prior art.

[0023] 2. In this utility model, the first angular contact ball bearing, the buffer pad, and the second angular contact ball bearing are connected in series at the front end of the outer wall of the rotating shaft, and the cylindrical roller bearing is on the rear side, forming a multi-bearing cooperative bearing structure, which greatly improves the ability to bear radial loads. The buffer pad can absorb vibration and impact forces, and the limiting shaft restricts the displacement of the rotating shaft, avoiding overload damage, reducing equipment failures, improving operational reliability, and solving the defect of low structural reliability. Attached Figure Description

[0024] Figure 1 This is a perspective view of a water pump shaft seal circulating cooling device proposed in this utility model;

[0025] Figure 2 This is a front view of a water pump shaft seal circulating cooling device proposed in this utility model;

[0026] Figure 3 This is a side view of a water pump shaft seal circulating cooling device proposed in this utility model;

[0027] Figure 4 This is a rear view of a water pump shaft seal circulating cooling device proposed in this utility model;

[0028] Figure 5 This is a structural exploded view of the heat dissipation mechanism of a water pump shaft seal circulating cooling device proposed in this utility model;

[0029] Figure 6 This is a structural exploded view of the stabilization mechanism of a water pump shaft seal circulating cooling device proposed in this utility model;

[0030] Figure 7 This is a schematic diagram of the impeller structure of a water pump shaft seal circulating cooling device proposed in this utility model.

[0031] In the diagram: 1. Pump body; 2. Heat dissipation mechanism; 201. Protective shell; 202. Limiting groove; 203. Fins; 204. Funnel; 205. Connecting shaft; 206. Fan blade; 207. Fixing groove; 208. Transmission block; 209. Heat dissipation hole; 3. Stabilizing mechanism; 301. Rotating shaft; 302. Angular contact ball bearing one; 303. Buffer pad; 304. Angular contact ball bearing two; 305. Cylindrical roller bearing; 306. Limiting shaft; 4. Dustproof plate; 5. Output block; 6. Injection pipe; 7. Pressure relief pipe; 8. Transmission pipe; 9. Fixing plate; 10. Fixing base; 11. Bracket; 12. Output shaft; 13. Limiting sleeve; 14. Impeller one; 15. Impeller two; 16. Connector. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0033] Reference Figure 1 , Figure 2 and Figure 5 The present invention provides an embodiment of a water pump shaft seal circulating cooling device, comprising a pump body 1, which serves as the installation base and main support structure of the entire device. A dustproof plate 4 is threadedly connected to the front end of the pump body 1. The dustproof plate 4 is used to prevent external dust from entering the device and affecting the operation of the components. A heat dissipation mechanism 2 is provided on the inner wall of the dustproof plate 4. The heat dissipation mechanism 2 is used to achieve heat dissipation during long-term operation. A stabilizing mechanism 3 is provided on the inner wall of the pump body 1. The stabilizing mechanism 3 is used to enhance the stability of the pump body 1 during operation.

[0034] The heat dissipation mechanism 2 includes a protective shell 201, which provides installation space for internal heat dissipation components and forms a closed heat dissipation cavity. The outer wall of the protective shell 201 is fixedly connected to the inner wall of the dustproof plate 4. This connection method is used to achieve a stable assembly between the protective shell 201 and the dustproof plate 4. Multiple limiting grooves 202 are formed around the inner wall of the protective shell 201. The limiting grooves 202 are used to position and fix the fins 203. Fins 203 are fixedly connected to the inner walls of the multiple limiting grooves 202. The fins 203 are used to increase the heat dissipation area to improve the heat exchange efficiency. A funnel 204 is connected to the top of the outer wall of the protective shell 201. The funnel 204 is used to facilitate the cooling medium. Inside the protective shell 201, the pump body 1 has a connecting shaft 205 at its front end. The connecting shaft 205 is used to transmit power and drive the fan blades 206 to rotate. The outer wall of the connecting shaft 205 has multiple fixing grooves 207 for installing and positioning the fan blades 206. The inner walls of the multiple fixing grooves 207 are all fixedly connected to the fan blades 206. The fan blades 206 are used to accelerate airflow to enhance heat dissipation. The front side of the outer wall of the dustproof plate 4 is fixedly connected to a transmission block 208 for guiding airflow. The outer wall of the transmission block 208 has heat dissipation holes 209 for allowing hot air inside the device to be discharged to achieve heat dissipation.

[0035] Specifically, the pump body 1 serves as the installation foundation and main support structure of the entire device. Its front end is threadedly connected to the dustproof plate 4. The dustproof plate 4 prevents external dust from entering the device to avoid affecting the operation of the components. The heat dissipation mechanism 2 installed on the inner wall of the dustproof plate 4 plays a heat dissipation role during long-term operation of the device. The stabilizing mechanism 3 set on the inner wall of the pump body 1 improves the stability of the pump body 1 during operation. In the heat dissipation mechanism 2, the protective shell 201 provides installation space for the internal heat dissipation components and forms a closed heat dissipation cavity. Its outer wall is fixedly connected to the inner wall of the dustproof plate 4 to achieve a stable assembly of the two. Multiple limiting grooves 202 around the inner wall of 01 position and fix the fins 203. The fins 203 improve heat exchange efficiency by increasing the heat dissipation area. The funnel 204 connected to the top of the outer wall of the protective shell 201 facilitates the injection of cooling medium into the protective shell 201. The connecting shaft 205 at the front end of the pump body 1 transmits power and drives the fan blades 206 to rotate. Multiple fixing grooves 207 on the outer wall of the connecting shaft 205 install and position the fan blades 206. The fan blades 206 enhance the heat dissipation effect by accelerating airflow. The transmission block 208 fixedly connected to the front side of the outer wall of the dustproof plate 4 guides the airflow.

[0036] Reference Figure 4 and Figure 6The stabilizing mechanism 3 includes a rotating shaft 301, which serves as the core transmission component for power transmission. The front and rear ends of the rotating shaft 301 are fixedly connected to the front and rear sides of the inner wall of the pump body 1, respectively. This connection method ensures the installation stability of the rotating shaft 301. An angular contact ball bearing 302 is rotatably connected to the front end of the outer wall of the rotating shaft 301. The angular contact ball bearing 302 is used to withstand radial and axial loads. A buffer pad 303 is fixedly connected to the front side of the angular contact ball bearing 302, which absorbs the impact force generated by vibration. An angular contact ball bearing 304 is fixedly connected to the front side of the buffer pad 303. Angle contact ball bearing 304 and angle contact ball bearing 302 work together to enhance load bearing capacity. A cylindrical roller bearing 305 is rotatably connected to the rear side of the outer wall of the rotating shaft 301. The cylindrical roller bearing 305 is used to further enhance the radial load bearing capacity. A limit shaft 306 is rotatably connected to the outer wall of the rotating shaft 301. The limit shaft 306 is used to limit the radial displacement range of the rotating shaft 301. An injection pipe 6 is fixedly connected to the left side of the output block 5. The injection pipe 6 is used to guide the medium into the output block 5. A pressure relief pipe 7 is connected to the right side of the injection pipe 6. The pressure relief pipe 7 is used to release pressure when the medium pressure is too high to ensure the safety of the device.

[0037] Specifically, the front and rear ends of the rotating shaft 301 of the stabilizing mechanism 3 are fixedly connected to the front and rear sides of the inner wall of the pump body 1 to ensure the installation stability of the rotating shaft 301. The rotating shaft 301, as the core transmission component, transmits power. The front end of the outer wall of the rotating shaft 301 is rotatably connected to the angular contact ball bearing 302. The angular contact ball bearing 302 bears radial and axial loads. The buffer pad 303 fixedly connected to its front side absorbs the impact force generated by vibration. The second angular contact ball bearing 304 fixedly connected to the front side of the buffer pad 303 cooperates with the first angular contact ball bearing 302 to enhance the load bearing capacity. The rear side of the outer wall of the rotating shaft 301 is rotatably connected to the cylindrical roller bearing 305 to further improve the radial load bearing capacity. The limiting shaft 306 rotatably connected to the outer wall of the rotating shaft 301 limits the radial displacement range of the rotating shaft 301. The front end of the connecting shaft 205 is provided with a connector 16. The connecting shaft 205 is used to directly fix the connector 16. The connector 16 is responsible for connecting to the output end of the motor.

[0038] Reference Figure 2 , Figure 3 and Figure 7The top front side of the inner wall of the output block 5 is connected to a transmission pipe 8, which is used to transfer the medium between the output block 5 and the pressure relief pipe 7. The rear end of the transmission pipe 8 is connected to the front side of the inner wall of the pressure relief pipe 7. This connection structure is used to form a passage for the medium to flow. The left and right sides of the outer wall of the pump body 1 are threaded with fixing plates 9, which are used to enhance the connection stability between the pump body 1 and the external mounting structure. The bottom of the outer wall of the pump body 1 is fixedly connected to a fixing base 10, which is used to stably support the entire device on the mounting surface. The bottom front of the output block 5 A bracket 11 is fixedly connected to the rear side. The bracket 11 is used to provide auxiliary support for the output block 5 to improve its installation firmness. An output shaft 12 is rotatably connected to the rear end of the inner wall of the output block 5. The output shaft 12 is used to transmit power and drive the impeller to rotate. A limit sleeve 13 is fixedly connected to the rear end of the output shaft 12. The limit sleeve 13 is used to limit the axial displacement of the output shaft 12. Impeller 1 14 and impeller 2 15 are rotatably connected to the front and rear sides of the outer wall of the output shaft 12, respectively. Impeller 1 14 and impeller 2 15 are used to push the medium to flow through rotation to realize the transport of the medium.

[0039] Specifically, the front side of the top of the inner wall of the output block 5 is connected to the transmission pipe 8, and the rear end of the transmission pipe 8 is connected to the front side of the inner wall of the pressure relief pipe 7, forming a medium flow path to realize the transmission of medium between the output block 5 and the pressure relief pipe 7. The left and right sides of the outer wall of the pump body 1 are threaded to the fixing plate 9 to enhance the connection stability between the pump body 1 and the external installation structure. The bottom of the outer wall of the pump body 1 is fixedly connected to the fixing base 10 to stably support the entire device on the mounting surface. The bottom front and rear sides of the output block 5 are fixedly connected to the bracket 11 to provide auxiliary support for the output block 5 and improve its installation firmness. The rear end of the inner wall of the output block 5 is rotatably connected to the output shaft 12 to transmit power and drive the impeller to rotate. The rear end of the output shaft 12 is fixedly connected to the limiting sleeve 13 to limit the axial displacement of the output shaft 12.

[0040] Working principle: The cooling medium is injected into the protective shell 201 through the funnel 204 connected to the top of the outer wall of the protective shell 201. The injected cooling medium is in full contact with the fins 203 fixed by the limiting grooves 202 around the inner wall of the protective shell 201. The limiting grooves 202 firmly fix the fins 203. By increasing the contact area with the cooling medium, the fins 203 quickly absorb the heat generated by the shaft seal when the pump body 1 is running, which greatly improves the heat exchange efficiency. The connecting shaft 205 at the front end of the pump body 1 drives the fan blades 206 installed in the fixing grooves 207 on the outer wall to rotate. The fixing grooves 207 ensure that the fan blades 206 rotate stably. The fan blades 206 accelerate the air flow around the protective shell 201, which promotes the rapid cooling of the cooling medium after absorbing heat. The transmission block 208 on the front side of the outer wall of the dustproof plate 4 guides the airflow. The heat dissipation holes 209 on the outer wall exhaust the hot air inside the device, which enhances the cooling effect. The coil-free structure completely avoids the technical problems related to coils.

[0041] Furthermore, when the pump body 1 becomes unstable due to fluctuations in operating conditions, the first angular contact ball bearing 302 and the second angular contact ball bearing 304 are connected in series through the buffer pad 303. Utilizing the characteristic that the angular contact ball bearings can simultaneously bear radial and axial loads, the radial offset of the front end of the rotating shaft 301 is first constrained. The buffer pad 303 absorbs the impact force generated by the vibration of the pump body 1 through its own elastic deformation, avoiding load concentration caused by the rigid contact between the two bearings and reducing the bearing wear rate. At the same time, the cylindrical roller bearing 305 on the rear side of the outer wall of the rotating shaft 301 further enhances the radial load bearing capacity. Its larger contact area can evenly distribute the radial load on the rear side of the rotating shaft 301 onto the raceway, effectively resisting the radial force impact generated when the pump body 1 is unstable, and preventing the rotating shaft 301 from bending and deforming due to uneven radial force. The limiting shaft 306 can further limit the radial displacement range of the rotating shaft 301, avoiding the bearing assembly from exceeding the displacement tolerance due to overload under extreme operating conditions.

[0042] 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 spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A water pump shaft seal circulating cooling device, comprising a pump body (1), characterized in that: The front end of the pump body (1) is threaded with a dustproof plate (4), and the inner wall of the dustproof plate (4) is provided with a heat dissipation mechanism (2). The heat dissipation mechanism (2) is used to dissipate heat during long-term operation. The inner wall of the pump body (1) is provided with a stabilizing mechanism (3). The heat dissipation mechanism (2) includes a protective shell (201). The outer wall of the protective shell (201) is fixedly connected to the inner wall of the dustproof plate (4). Multiple limiting grooves (202) are opened around the inner wall of the protective shell (201). Fins (203) are fixedly connected to the inner walls of the multiple limiting grooves (202). A funnel (204) is connected to the top of the outer wall of the protective shell (201). A connecting shaft (205) is provided at the front end of the pump body (1). Multiple fixing grooves (207) are opened on the outer wall of the connecting shaft (205). Fan blades (206) are fixedly connected to the inner walls of the multiple fixing grooves (207). A transmission block (208) is fixedly connected to the front side of the outer wall of the dustproof plate (4). Heat dissipation holes (209) are opened on the outer wall of the transmission block (208).

2. The water pump shaft seal circulating cooling device according to claim 1, characterized in that: The stabilizing mechanism (3) includes a rotating shaft (301), the front and rear ends of which are fixedly connected to the front and rear sides of the inner wall of the pump body (1), respectively. An angular contact ball bearing (302) is rotatably connected to the front end of the outer wall of the rotating shaft (301), a buffer pad (303) is fixedly connected to the front side of the angular contact ball bearing (302), an angular contact ball bearing (304) is fixedly connected to the front side of the buffer pad (303), a cylindrical roller bearing (305) is rotatably connected to the rear side of the outer wall of the rotating shaft (301), and a limit shaft (306) is rotatably connected to the outer wall of the rotating shaft (301).

3. The water pump shaft seal circulating cooling device according to claim 1, characterized in that: The pump body (1) has an output block (5) threaded to the rear end of its outer wall, and an injection pipe (6) is provided on the top right side of the outer wall of the dustproof plate (4).

4. A water pump shaft seal circulating cooling device according to claim 3, characterized in that: An injection tube (6) is fixedly connected to the left side of the output block (5), and a pressure relief tube (7) is connected to the right side of the injection tube (6).

5. A water pump shaft seal circulating cooling device according to claim 4, characterized in that: The top front side of the inner wall of the output block (5) is connected to a transmission pipe (8), and the rear end of the transmission pipe (8) is connected to the front side of the inner wall of the pressure relief pipe (7).

6. A water pump shaft seal circulating cooling device according to claim 1, characterized in that: The pump body (1) has a fixed plate (9) threadedly connected to the left and right sides of its outer wall, and a fixed base (10) is fixedly connected to the bottom of its outer wall.

7. A water pump shaft seal circulating cooling device according to claim 3, characterized in that: The bottom front and rear sides of the output block (5) are fixedly connected to brackets (11), and the rear end of the inner wall of the output block (5) is rotatably connected to an output shaft (12).

8. A water pump shaft seal circulating cooling device according to claim 7, characterized in that: The output shaft (12) is fixedly connected to the rear end of the limiting sleeve (13), and the front and rear sides of the outer wall of the output shaft (12) are respectively rotatably connected to impeller one (14) and impeller two (15). The front end of the connecting shaft (205) is provided with a connector (16).

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