A fluoroplastic magnetic pump anti-dry running protection bearing housing structure

Abstract

This utility model discloses a fluoroplastic magnetic pump anti-dry-run protection bearing housing structure, specifically relating to the field of magnetic pumps, including a pump cover, a first bearing housing, and a second bearing housing. The fluoroplastic magnetic pump anti-dry-run protection bearing housing structure of this utility model, by setting spiral cooling channels in the first bearing housing, intermediate ring, and second bearing housing respectively, allows coolant to flow sequentially through, forming a continuous cooling circuit. This maximizes the absorption and removal of heat from the bearing area. The spiral channel design increases the heat exchange area and coolant flow, significantly improving heat dissipation efficiency and achieving rapid cooling of the bearing area. This solves the key problem of rapid bearing burnout due to frictional overheating during dry running of the magnetic pump. This utility model can quickly and accurately suppress bearing temperature rise in the early stages of dry running of the magnetic pump, effectively preventing bearing burnout and significantly improving the operational reliability and service life of the fluoroplastic magnetic pump under harsh operating conditions.

Description

Technical Field

[0001] This utility model relates to the field of magnetic pumps, and in particular to a fluoroplastic magnetic pump anti-dry running protection bearing housing structure. Background Technology

[0002] Magnetic drive pumps are sealed pumps that utilize the principle of magnetic coupling to achieve contactless torque transmission, and are widely used in applications involving the transportation of flammable, explosive, toxic, highly corrosive, or valuable media. Their core advantage lies in the complete elimination of shaft seal leakage points. However, during normal operation, the medium flows through the bearing cavity to lubricate and cool the sliding bearing, keeping the bearing cavity temperature within the normal range. When the magnetic drive pump operates dry, the lack of medium lubrication and cooling within the bearing cavity causes the sliding bearing friction pair to rapidly generate high temperatures, leading to overheating of the bearing material, accelerated wear, and even melting and seizing. Utility Model Content

[0003] The main objective of this invention is to provide a fluoroplastic magnetic pump anti-dry running protection bearing housing structure, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A fluoroplastic magnetic pump anti-dry-run protection bearing housing structure includes a pump cover, a first bearing housing, and a second bearing housing. Both the first and second bearing housings have bearing cavities for mounting sliding bearings and have shaft holes for the pump shaft to pass through. The pump cover has a first mounting groove and a second mounting groove on its left and right sides of a central circular hole, respectively. The first and second bearing housings are fixedly mounted in the first and second mounting grooves by bolts, respectively. An intermediate ring is provided between the first and second bearing housings. The pump cover has a storage cavity inside, and the side wall of the storage cavity has a liquid outlet channel communicating with the inner wall of the first mounting groove. The first and second bearing housings have a first spiral cooling channel and a second spiral cooling channel, respectively. The first spiral cooling channel has a first inlet hole and a first outlet hole at both ends, and the second spiral cooling channel has a second outlet hole and a second inlet hole at both ends, respectively. A third insertion tube communicating with the second outlet hole is fixedly installed on the left side of the second bearing housing, and a tube communicating with the first inlet hole is fixedly installed on the outside of the first bearing housing. The first insert is connected to the liquid outlet channel. A third spiral cooling channel is formed inside the intermediate ring. A third liquid inlet and a third liquid outlet are formed at both ends of the third spiral cooling channel. A second insertion port communicating with the third liquid inlet is formed at the left end of the intermediate ring. A fourth insert communicating with the third liquid outlet is fixedly installed at the right end of the intermediate ring. A second insert communicating with the first liquid outlet is fixedly installed at the right end of the first bearing seat. The second insert is inserted into the second insertion port. A fourth insert communicating with the third liquid outlet is fixedly installed at the left end of the second bearing seat. The pump cover has a first insertion port connected to the second liquid inlet hole. The fourth insertion tube is inserted into the first insertion port. A condenser tube is fixedly installed on the upper end of the pump cover. A conveying channel is opened on the right side inside the pump cover. One end of the conveying channel extends through to the second mounting groove. The third insertion tube is inserted into the conveying channel. The other end of the conveying channel extends through to the outside of the pump cover and is connected to one end of the condenser tube. A liquid inlet channel communicating with the outside is opened at the top of the storage cavity. The other end of the condenser tube is connected to the liquid inlet channel. Heat dissipation fins are fixedly installed on the outer surface of the condenser tube.

[0006] Preferably, a pump body is installed inside the storage cavity, and the output end of the pump body is connected to the liquid outlet channel.

[0007] Preferably, sealing rings are provided at both ends of the intermediate ring and between the first bearing seat and the second bearing seat, and a through hole is provided in the middle of the sealing ring.

[0008] Preferably, the first bearing housing and the second bearing housing of the bearing housing body are made of a metal material with good thermal conductivity.

[0009] Preferably, a temperature sensor is embedded in both the first bearing housing and the second bearing housing, and the temperature sensing end of the temperature sensor is located on the inner wall surface of the bearing cavity or adjacent to the bearing cavity.

[0010] Preferably, the pump body is provided with a control valve, and the signal input terminal of the control valve is electrically connected or signal-connected to the output terminal of the temperature sensor.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] This invention discloses a bearing housing structure for preventing dry running of a fluoroplastic magnetic pump. By incorporating spiral cooling channels within the first bearing housing, intermediate ring, and second bearing housing, and allowing coolant to flow sequentially through these channels, a continuous cooling circuit is formed. This maximizes the absorption and removal of heat from the bearing area. The spiral channel design increases the heat exchange area and coolant flow, significantly improving heat dissipation efficiency and achieving rapid cooling of the bearing area. This solves the critical problem of rapid bearing burnout due to frictional overheating during dry running of the magnetic pump. This invention can quickly and accurately suppress bearing temperature rise in the initial stage of dry running of the magnetic pump, effectively preventing bearing burnout and significantly improving the operational reliability and service life of the fluoroplastic magnetic pump under harsh operating conditions. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 For the present utility model Figure 1 Enlarged view of point A in the middle;

[0015] Figure 3 For the present utility model Figure 1 Enlarged view of point B in the middle;

[0016] Figure 4 For the present utility model Figure 1 Enlarged view of point C in the middle;

[0017] Figure 5 For the present utility model Figure 1 Enlarged diagram of point D in the middle.

[0018] In the diagram: 1. Pump cover; 2. First bearing housing; 3. Second bearing housing; 4. Intermediate ring; 5. Sealing ring; 6. Condenser tube; 7. Heat dissipation fins; 8. Pump body; 11. First mounting groove; 12. Second mounting groove; 101. Storage chamber; 102. Liquid outlet channel; 103. Conveying channel; 104. Liquid inlet channel; 21. First spiral cooling channel; 31. Second spiral cooling channel; 41. Third spiral cooling channel; 22. First liquid inlet hole; 23. First insertion tube; 24. First liquid outlet hole; 25. Second insertion tube; 32. Second liquid outlet hole; 33. Third insertion tube; 34. Second liquid inlet hole; 35. First insertion interface; 51. Through hole; 42. Third liquid inlet hole; 43. Second insertion interface; 44. Third liquid outlet hole; 45. Fourth insertion tube. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] like Figure 1-5As shown, a fluoroplastic magnetic pump anti-dry-run protection bearing housing structure includes a pump cover 1, a first bearing housing 2, and a second bearing housing 3. Both the first bearing housing 2 and the second bearing housing 3 have bearing cavities for mounting sliding bearings and have shaft holes for the pump shaft to pass through. The pump cover 1 has a first mounting groove 11 and a second mounting groove 12 on the left and right sides of the central circular hole, respectively. The first bearing housing 2 and the second bearing housing 3 are fixedly mounted in the first mounting groove 11 and the second mounting groove 12 by bolts, respectively. An intermediate ring 4 is provided between the first bearing housing 2 and the second bearing housing 3. A storage cavity 101 is provided inside the pump cover 1. The first bearing seat 2 and the second bearing seat 3 are respectively provided with a liquid outlet channel 102 communicating with the inner wall of the first mounting groove 11. The first spiral cooling channel 2 and the second spiral cooling channel 31 are respectively provided with a first liquid inlet 22 and a first liquid outlet 24 at both ends of the first spiral cooling channel 21. The second spiral cooling channel 31 is respectively provided with a second liquid outlet 32 ​​and a second liquid inlet 34 at both ends. A third insertion tube 33 communicating with the second liquid outlet 32 ​​is fixedly installed on the left side of the second bearing seat 3. A first insertion tube 23 communicating with the first liquid inlet 22 is fixedly installed on the outside of the first bearing seat 2. The first insertion tube 23 communicates with the liquid outlet channel 102. The intermediate ring 4 has a third spiral cooling channel 41 inside, with a third liquid inlet 42 and a third liquid outlet 44 at both ends. The left end of the intermediate ring 4 has a second insertion interface 43 communicating with the third liquid inlet 42. The right end of the intermediate ring 4 is fixedly fitted with a fourth insertion tube 45 communicating with the third liquid outlet 44. The right end of the first bearing seat 2 is fixedly fitted with a second insertion tube 25 communicating with the first liquid outlet 24. The second insertion tube 25 is inserted into the second insertion interface 43. The left end of the second bearing seat 3 is fixedly fitted with a first insertion interface 35 communicating with the second liquid inlet 34. The fourth insertion tube... The 45 is inserted into the first insertion interface 35. A condenser tube 6 is fixedly installed on the upper end of the pump cover 1. A conveying channel 103 is opened on the right side inside the pump cover 1. One end of the conveying channel 103 extends through to the second mounting groove 12. The third insertion tube 33 is inserted into the conveying channel 103. The other end of the conveying channel 103 extends through to the outside of the pump cover 1 and is connected to one end of the condenser tube 6. A liquid inlet channel 104 communicating with the outside is opened at the top of the storage cavity 101. The other end of the condenser tube 6 is connected to the liquid inlet channel 104. A heat dissipation fin 7 is fixedly installed on the outer surface of the condenser tube 6. The heat dissipation fin 7 dissipates heat and cools the coolant in the condenser tube 6.

[0021] A pump body 8 is installed inside the storage cavity 101, and the output end of the pump body 8 is connected to the liquid outlet channel 102.

[0022] Both ends of the intermediate ring 4 are provided with sealing rings 5 ​​between the first bearing seat 2 and the second bearing seat 3, and a through hole 51 is provided in the middle of the sealing ring 5.

[0023] The bearing housing body, the first bearing housing 2 and the second bearing housing 3, are made of a metal material with good thermal conductivity.

[0024] A temperature sensor, such as a Pt resistance thermometer, is drilled and embedded in the bearing housing body along the axial (or radial) direction. The sensing end of the temperature sensor must be precisely positioned so that it is in direct contact with or very close to the inner wall surface of the bearing cavity, ensuring that temperature changes in the working area of ​​the sliding bearing can be detected quickly and accurately.

[0025] A control valve is installed on the pump body 8. The signal input terminal of the control valve is electrically or signal-connected to the output terminal of the temperature sensor. When the magnetic pump is running normally, the bearing cavity temperature is lower than the set temperature, the control valve is closed, and no coolant flows. Once dry running occurs, the bearing temperature rises rapidly. When the temperature sensor detects that the temperature is higher than the set temperature, the control valve is energized and opens, and coolant (such as cold water) flows in through the liquid outlet channel 102 to the first liquid inlet 22, and then to the first spiral cooling channel 21. It strongly absorbs and carries away the heat of the first bearing seat 2, thereby rapidly reducing the temperature of the first bearing cavity area.

[0026] The working principle of this utility model is as follows: When the magnetic pump is running normally, the bearing cavity temperature is lower than the set temperature, the control valve is closed, and there is no coolant flow. Once dry running occurs, the bearing temperature rises rapidly. When the temperature sensor detects that the temperature is higher than the set temperature, the control valve is energized and opens, and coolant (such as cold water) flows in through the outlet channel 102 to the first inlet hole 22, and then flows to the first spiral cooling channel 21, strongly absorbing and carrying away the heat of the first bearing seat 2, thereby rapidly reducing the temperature of the first bearing cavity area. Then, the coolant flows through the first liquid outlet 24 into the third liquid inlet 42, and then into the third spiral cooling channel 41 to absorb the heat from the intermediate ring 4. It is then transported through the third liquid outlet 44 to the second liquid inlet 34, and then to the second spiral cooling channel 31, where it strongly absorbs and carries away the heat from the second bearing housing 3, thus rapidly reducing the temperature of the bearing cavity area. The coolant is then transported through the second liquid outlet 32 ​​and the transport channel 103 to the condenser 6 to cool it down. Finally, it is transported back to the storage chamber 101 for the next cooling cycle. The coolant circulates within the first spiral cooling channel 21, the third spiral cooling channel 41, and the second spiral cooling channel 31, absorbing the heat from the first bearing housing 2 and the second bearing housing 3. When the temperature sensor temperature drops below a safe value, the control valve closes. This process effectively prevents the bearing from burning out rapidly during the initial dry-running phase, thus protecting the bearing.

[0027] 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 illustrative of the principles of this 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 claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fluoroplastic magnetic pump anti-dry-run protection bearing housing structure, characterized in that: The pump includes a pump cover (1), a first bearing seat (2), and a second bearing seat (3). Both the first bearing seat (2) and the second bearing seat (3) have bearing cavities. These bearing cavities are used to install sliding bearings and have shaft holes through which the pump shaft passes. A first mounting groove (11) and a second mounting groove (12) are respectively opened on the left and right sides of the central circular hole in the pump cover (1). The first bearing seat (2) and the second bearing seat (3) are respectively fixedly installed in the first mounting groove (11) and the second mounting groove (12) by bolts. An intermediate ring (4) is provided between the first bearing seat (2) and the second bearing seat (3). A storage cavity (101) is provided inside the pump cover (1). The side wall of the storage cavity (101) has a groove that connects to the first mounting groove (11). The inner wall of the bearing housing (2) is connected to the liquid outlet channel (102). The first bearing housing (2) and the second bearing housing (3) are respectively provided with a first spiral cooling channel (21) and a second spiral cooling channel (31). The first spiral cooling channel (21) is provided with a first liquid inlet (22) and a first liquid outlet (24) at both ends. The second spiral cooling channel (31) is provided with a second liquid outlet (32) and a second liquid inlet (34) at both ends. A third insertion tube (33) communicating with the second liquid outlet (32) is fixedly installed on the left side of the second bearing housing (3). A first insertion tube (23) communicating with the first liquid inlet (22) is fixedly installed on the outside of the first bearing housing (2). The first insertion tube (23) is connected to the liquid outlet channel. (102) Insertion: The middle ring (4) has a third spiral cooling channel (41) inside. The two ends of the third spiral cooling channel (41) are respectively provided with a third liquid inlet (42) and a third liquid outlet (44). The left end of the middle ring (4) is provided with a second insertion interface (43) communicating with the third liquid inlet (42). The right end of the middle ring (4) is fixedly installed with a fourth insertion tube (45) communicating with the third liquid outlet (44). The right end of the first bearing seat (2) is fixedly installed with a second insertion tube (25) communicating with the first liquid outlet (24). The second insertion tube (25) is inserted into the second insertion interface (43). The left end of the second bearing seat (3) is fixedly installed with a first insertion tube communicating with the second liquid inlet (34). Interface (35), the fourth insertion tube (45) is inserted into the first insertion interface (35), the upper end of the pump cover (1) is fixedly installed with a condenser tube (6), the right side of the pump cover (1) is provided with a conveying channel (103), one end of the conveying channel (103) extends through to the second mounting groove (12), the third insertion tube (33) is inserted into the conveying channel (103), the other end of the conveying channel (103) extends through to the outside of the pump cover (1) and is connected to one end of the condenser tube (6), the top of the storage cavity (101) is provided with a liquid inlet channel (104) communicating with the outside, the other end of the condenser tube (6) is connected to the liquid inlet channel (104), and the outer surface of the condenser tube (6) is fixedly installed with heat dissipation fins (7).

2. The fluoroplastic magnetic pump anti-run-dry bearing block structure according to claim 1, characterized in that: A pump body (8) is installed inside the storage chamber (101), and the output end of the pump body (8) is connected to the liquid outlet channel (102).

3. The fluoroplastic magnetic pump anti-run-dry bearing block structure of claim 1, wherein: The two ends of the intermediate ring (4) are provided with sealing rings (5) between the first bearing seat (2) and the second bearing seat (3), and the sealing ring (5) has a through hole (51) in the middle.

4. The fluoroplastic magnetic pump anti-run-dry bearing block structure of claim 1, wherein: The bearing housing body, the first bearing housing (2) and the second bearing housing (3), are made of a metal material with good thermal conductivity.

5. The fluoroplastic magnetic pump anti-run-dry bearing block structure of claim 1, wherein: Temperature sensors are embedded in both the first bearing housing (2) and the second bearing housing (3), and the temperature sensing end of the temperature sensor is located on the inner wall surface of the bearing cavity or adjacent to the bearing cavity.

6. The fluoroplastic magnetic pump anti-run-dry bearing block structure of claim 2, wherein: The pump body (8) is equipped with a control valve, and the signal input terminal of the control valve is electrically connected or signal-connected to the output terminal of the temperature sensor.

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