Thin oil sealing waterproof device for bearing seat

Abstract

The utility model relates to the field of mechanical engineering, in particular to a bearing seat thin oil sealing waterproof device which comprises a roller body and a bearing seat. The waterproof structure comprises a water retaining ring and a water throwing cover; and the water retaining ring is arranged between the roller body and the bearing seat and is fixedly connected with the end face of the roller body through a bolt. According to the multi-stage waterproof structure design, the water retaining ring with the inclined boss and the split type water throwing cover are arranged between the roller body and the bearing seat, water flow is guided to be discharged through the water outlet by centrifugal force, and external water is effectively prevented from invading the bearing seat in cooperation with an annular gap formed by dynamic rotation; the problem that a traditional sealing structure is prone to failure in a high-pressure flushing environment is solved, through the synergistic effect of dynamic oil control and the sealing assembly, the W-shaped oil grooves which are spirally distributed are formed in the shaft body, the throttling effect of the oil retainer ring and the throttling effect of the oil retainer ring are combined, a small amount of leaked oil liquid is recycled to a lubricating system through centrifugal force and gravity, and oil liquid waste and environmental pollution are reduced.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical engineering, specifically relating to a thin oil sealing and waterproofing device for bearing housings. Background Technology

[0002] In industrial production, bearings are key components of mechanical equipment, and their operating condition directly affects the performance and lifespan of the equipment. For bearings operating in humid, wet, or flushing environments, such as papermaking machinery, mining equipment, and food processing machinery, the sealing and waterproofing performance of the bearing housing and the reliability of the lubrication system are of paramount importance.

[0003] In existing technologies, common structures such as oil seals and labyrinth seals are prone to sealing failure when faced with high-pressure flushing or high-humidity environments. This allows water and impurities to enter the bearing housing, contaminate the lubricating oil, and accelerate bearing wear. Although thin oil lubrication can provide good lubrication and heat dissipation, traditional systems lack effective waterproof design. Once water enters, it will emulsify the lubricating oil, reduce lubrication performance, and even cause bearing corrosion and seizure. After seal failure, frequent replacement of lubricating oil and seals is required, increasing downtime and maintenance costs, affecting production efficiency. Lubricating oil leakage may pollute the environment, and the treatment of water-containing lubricating oil also faces environmental pressure. Utility Model Content

[0004] To overcome the problems of insufficient waterproofing of existing sealing structures, low reliability of lubrication systems, high maintenance costs, and high environmental pollution risks, a thin oil sealing waterproofing device for bearing housings is proposed.

[0005] The technical solution of this utility model is: a bearing housing thin oil sealing and waterproof device, including a roller body and a bearing housing; it also includes a waterproof structure, which includes a water-blocking ring and a water-spraying cover;

[0006] A water-retaining ring is located between the roller body and the bearing housing and is fixedly connected to the end face of the roller body by bolts. The side of the water-retaining ring facing the bearing housing has an annular boss, and the annular boss is inclined at an angle of 15°-30° to the axis of the shaft body.

[0007] The water-spraying cover is fixedly connected to the outer bearing end cover by bolts. The inner wall of the water-spraying cover and the outer wall of the boss of the water-blocking ring form an annular gap of 0.5-2mm. The bottom of the water-spraying cover is provided with a drain outlet, which is connected to an external water collection device.

[0008] The sealing structure includes an oil baffle ring and an oil baffle plate;

[0009] The oil retainer ring is sleeved on the shaft body and located between the bearing body and the inner bearing end cover;

[0010] The oil retainer ring is embedded in the inner hole of the outer bearing end cover and is clearance-fitted with the outer wall of the shaft.

[0011] The first W-shaped oil groove and the second W-shaped oil groove are respectively opened on the outer wall of the shaft body. The first W-shaped oil groove is located between the inner bearing end cover and the bearing body, and the second W-shaped oil groove is located between the outer bearing end cover and the bearing body.

[0012] The labyrinth seal is formed by the outer peripheral boss of the inner bearing end cover and the inner hole groove of the bearing seat, including at least 3 sets of staggered bosses and grooves to form a tortuous channel with a channel gap of 0.5-1.5mm.

[0013] The lip seal ring has an inner skeleton double lip structure and is embedded in the outer end hole of the outer bearing end cover. The lip is interference-fitted with the outer wall of the shaft, and the fit clearance is ≤0.1mm.

[0014] In the static sealing assembly, the mating surface between the inner bearing end cover and the bearing housing is sealed by a first O-ring, and the mating surface between the outer bearing end cover and the bearing housing is sealed by a second O-ring, and both mating surfaces are coated with heat-resistant silicone-based sealant.

[0015] Furthermore, the water-blocking ring is made of stainless steel, and the water-spraying cover is a split stainless steel structure. The outer diameter of the boss of the water-blocking ring is 5-10mm larger than the inner diameter of the water-spraying cover, and the inclined surface of the boss faces the drain port of the water-spraying cover.

[0016] Furthermore, the first W-shaped oil groove and the second W-shaped oil groove have opposite spiral directions, with a spiral helix angle of 10°-20°, and the oil groove cross-section is rectangular or trapezoidal. The groove depth of the two W-shaped oil grooves is 2-5mm, the groove width is 5-10mm, and they are both spirally distributed along the circumference of the shaft.

[0017] Furthermore, the lip seal is made of nitrile rubber or fluororubber, with a Shore A hardness of 70-90 and an interference fit of 0.2-0.5mm.

[0018] Furthermore, the height of the boss in the labyrinth seal is 2-5mm, the depth of the groove is 3-6mm, and the radial gap between adjacent bosses and grooves is 0.5-1.5mm.

[0019] Furthermore, the inner diameter of the drain outlet of the water-spraying cover is 8-15mm, and the axis of the drain outlet is inclined downward at an angle of 5°-15° to the horizontal plane.

[0020] Furthermore, the outer diameter of the oil baffle ring is 2-5mm larger than the outer diameter of the inner ring of the bearing body, and the thickness of the oil baffle ring is 5-10mm.

[0021] Furthermore, the first and second O-rings are made of hydrogenated nitrile rubber with a Shore A hardness of 70-80 and a cross-sectional diameter of 3-5 mm.

[0022] Furthermore, the heat-resistant silicone-based sealant has a temperature range of -40℃ to 200℃, a tensile strength ≥3MPa, and an elongation at break ≥200%.

[0023] This utility model also provides a bearing housing sealing and lubrication system, which includes the bearing housing thin oil sealing and waterproofing device as described above, and also includes a thin oil station, a pipeline system and a monitoring system.

[0024] A thin oil station includes an oil supply pump set, an oil tank, an oil cooler, an oil filtration system, and an oil-water separator;

[0025] The fuel supply pump assembly includes at least two fuel supply pumps, wherein:

[0026] The first set of oil supply pumps independently drives the lubrication points of the Yanke drying cylinder reduction gearbox, Yanke drying cylinder bearings, and vacuum roller bearings;

[0027] The second set of oil supply pumps drives the lubrication points of the bearing bodies on the rollers, in addition to the lubrication points mentioned above.

[0028] The oil tank is internally divided into an oil inlet chamber and an oil return chamber. The oil inlet chamber is connected to each lubrication point through the oil supply pipe, and the oil return chamber is connected to the oil return port on each bearing housing through the oil return pipe.

[0029] The oil cooler uses a plate heat exchanger and is equipped with an automatic temperature control module. The cooling water pipes of the oil cooler adopt a double sealing structure, including an inner rubber sealing ring and an outer metal bellows seal.

[0030] Oil filtration system, including coarse filter, fine filter and magnetic mesh filter;

[0031] A coarse filter with a precision of 50-100μm is located at the inlet of the oil inlet chamber;

[0032] A fine filter with a precision of 5-10μm is installed on the main oil supply line;

[0033] A magnetic mesh filter, located in the oil return chamber, is used to adsorb ferromagnetic impurities;

[0034] The oil-water separator is connected to the oil return chamber. Based on the working principle of vacuum dehydration and degassing, it removes free water, emulsified water, and most of the water and gas dissolved in the oil. It automatically starts when the moisture sensor detects that the moisture content in the oil exceeds 0.1%, and automatically stops working when the residual water content is 120ppm (0.012%), and automatically opens the bypass oil circuit.

[0035] Piping system, including main oil supply pipe and return oil pipe;

[0036] The main oil supply pipe connects to the oil inlet of each lubrication point through a branch oil supply pipe with a flow regulating valve. The oil inlet is located on the upper part of the bearing housing.

[0037] The return oil pipe connects to the return oil port at the bottom of the bearing housing and communicates with the return oil chamber of the oil tank. A check valve and a return oil filter are installed on the return oil pipe.

[0038] The monitoring system includes a sensor array and a host computer system.

[0039] The sensor group includes:

[0040] Temperature transmitters are installed at the oil tank, the main oil supply pipe, and the return oil ports of each bearing housing.

[0041] Pressure transmitters are installed at the oil supply pump outlet and in each oil supply branch pipe;

[0042] A moisture sensor is located in the oil return chamber and at the outlet of the oil-water separator.

[0043] The level transmitter is located on top of the oil tank;

[0044] The host computer system communicates with each sensor via signal lines and is configured with:

[0045] The oil temperature monitoring module uses a temperature probe to monitor the oil outlet temperature in real time and can automatically adjust the cooling water supply to the oil cooler to ensure that the oil outlet temperature does not exceed 50°C. When the oil temperature exceeds 70°C, an alarm is triggered to prompt the operator to check the cooling device. During the initial start-up in cold seasons such as winter, if the oil temperature is detected to be below 40°C, the electric heater in the oil tank will be activated immediately to heat the oil to 40°C and then automatically stop heating.

[0046] The oil pressure monitoring module triggers an alarm and switches to the backup pump when it detects that the oil supply pressure is lower than 0.3MPa.

[0047] The moisture monitoring module automatically starts the oil-water separator when it detects that the moisture content in the oil return chamber exceeds 0.1%, and shuts it off when the moisture content is below 0.012%.

[0048] The liquid level monitoring module triggers a refueling alarm when it detects that the liquid level in the tank is below the lower limit.

[0049] The beneficial effects of this utility model are:

[0050] 1. This utility model adopts a multi-level waterproof structure design, and sets a water-blocking ring with an inclined boss and a split water-throwing cover between the roller body and the bearing seat. It uses centrifugal force to guide the water flow through the drain outlet and, together with the annular gap formed by dynamic rotation, effectively prevents external water from entering the bearing seat, thus solving the problem that traditional sealing structures are prone to failure under high-pressure flushing environment.

[0051] 2. Through the synergistic effect of dynamic oil control and sealing components, W-shaped oil grooves are spirally distributed on the shaft. Combined with the throttling effect of the oil retainer ring and oil retainer, a small amount of leaked oil is recovered to the lubrication system by centrifugal force and gravity, reducing oil waste and environmental pollution. At the same time, the labyrinth seal and lip seal form multiple barriers. Together with the O-ring seal and heat-resistant silicone sealant, the overall sealing performance of the bearing housing is significantly improved, reducing the risk of oil leakage.

[0052] 3. The integrated lubrication system precisely distributes oil volume through grouped oil supply pumps, automatically controls oil temperature with plate-type oil coolers, and ensures oil cleanliness with multi-stage filtration and oil-water separation devices. This solves the problems of insufficient heat dissipation and easy emulsification of traditional thin oil lubrication, thereby reducing bearing operating temperature and extending life. The intelligent monitoring system collects parameters such as oil temperature and oil pressure in real time, and controls equipment start-up and shutdown and fault alarms in a coordinated manner, reducing the frequency of manual inspections and improving maintenance efficiency and equipment reliability. Attached Figure Description

[0053] Figure 1 The diagram shown is a cross-sectional view of this utility model.

[0054] Figure 2 The diagram shown is a schematic diagram of the first centralized thin oil lubrication system layout of this utility model;

[0055] Figure 3 The diagram shown is a schematic diagram of the second centralized thin oil lubrication system layout of this utility model;

[0056] Figure 4 The diagram shown is of the centralized thin oil lubrication system of this utility model.

[0057] The markings in the attached diagram are as follows: 1. Water-retaining ring; 2. Water-slinging cover; 3. Oil-retaining ring; 4. Oil-retaining ring; 5. First W-shaped oil groove; 6. Second W-shaped oil groove; 7. Labyrinth seal; 8. Lip seal; 9. First O-ring seal; 10. Bearing housing; 11. Oil inlet; 12. Heat-resistant silicone sealant applied to the mating surface; 13. Second O-ring seal; 14. Outer bearing end cover; 15. Bearing body; 16. Oil return port; 17. Inner bearing end cover; 18. Drain outlet; 19. Shaft body; 20. Roller body. Detailed Implementation

[0058] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0059] Please see Figure 1 This utility model provides an embodiment of a bearing housing thin oil sealing and waterproofing device, which includes a roller body 20 and a bearing housing 10; it also includes a waterproofing structure, which includes a water-blocking ring 1 and a water-spraying cover 2;

[0060] A water-blocking ring 1 is located between the roller body 20 and the bearing seat 10 and is fixedly connected to the end face of the roller body 20 by bolts. The water-blocking ring 1 has an annular boss on the side facing the bearing seat 10, and the annular boss is inclined at an angle of 15°-30° to the axis of the shaft body 19.

[0061] The water-spraying cover 2 is fixedly connected to the outer bearing end cover 14 by bolts. The inner wall of the water-spraying cover 2 and the outer wall of the boss of the water-blocking ring 1 form an annular gap of 0.5-2mm. The bottom of the water-spraying cover 2 is provided with a drain outlet 18, which is connected to an external water collection device.

[0062] The sealing structure includes an oil baffle ring 3 and an oil baffle 4;

[0063] Oil baffle ring 3 is sleeved on shaft 19 and located between bearing body 15 and inner bearing end cover 17;

[0064] The oil baffle ring 4 is embedded in the inner hole of the outer bearing end cover 14 and is clearance-fitted with the outer wall of the shaft body 19.

[0065] The first W-shaped oil groove 5 and the second W-shaped oil groove 6 are respectively opened on the outer wall of the shaft body 19. The first W-shaped oil groove 5 is located between the inner bearing end cover 17 and the bearing body 15, and the second W-shaped oil groove 6 is located between the outer bearing end cover 14 and the bearing body 15.

[0066] The labyrinth seal 7 is formed by the outer peripheral boss of the inner bearing end cover 17 and the inner hole groove of the bearing seat 10, including at least 3 sets of staggered bosses and grooves to form a tortuous channel with a channel gap of 0.5-1.5mm.

[0067] The lip seal 8 has an inner skeleton double lip structure and is embedded in the outer end hole of the outer bearing end cover 14. The lip is interference-fitted with the outer wall of the shaft 19 and the fit clearance is ≤0.1mm.

[0068] In the static sealing assembly, the mating surface between the inner bearing end cover 17 and the bearing housing 10 is sealed by a first O-ring seal 9, and the mating surface between the outer bearing end cover 14 and the bearing housing 10 is sealed by a second O-ring seal 13, and both mating surfaces are coated with heat-resistant silicone-based sealant 12.

[0069] When the equipment is running, the roller 20 drives the water-blocking ring 1 to rotate at high speed. The inclined boss of the water-blocking ring 1 (with an inclination angle of 15°-30° to the axis of the shaft 19) guides external water such as spray water and flushing water to the outside of the boss. Using centrifugal force, the water flows along the inner wall of the water-spinning cover 2 to the bottom and is discharged into the external water collection device through the drain port 18 at the bottom of the water-spinning cover 2, thus avoiding direct contact between water and the sealing surface of the bearing seat 10.

[0070] When the shaft 19 rotates, the oil baffle ring 3 fitted on the shaft 19 blocks the thin oil thrown out by the bearing body 15. Together with the oil baffle ring 4 embedded in the inner hole of the outer bearing end cover 14, it forms the first oil control barrier. A small amount of leaked oil is captured by the first W-shaped oil groove 5 and the second W-shaped oil groove 6 on the outer wall of the shaft 19. The first W-shaped oil groove 5 is located between the inner bearing end cover 17 and the bearing body 15, and the second W-shaped oil groove 6 is located between the outer bearing end cover 14 and the bearing body 15. Under the centrifugal force of the spiral groove, the two flow towards the inner side of the bearing seat 10 and finally flow back to the lubrication system through the oil return port 16 at the bottom of the bearing seat 10.

[0071] The labyrinth seal 7 (formed by at least 3 sets of staggered bosses and grooves with a gap of 0.5-1.5mm) between the inner bearing end cover 17 and the bearing housing 10 uses the gap throttling effect to block tiny water droplets and dust through multiple tortuous channels; the lip seal ring 8 (double lip structure, interference fit with the shaft 19, gap ≤0.1mm) in the outer end hole of the outer bearing end cover 14 forms a sealing pressure zone when it rotates dynamically, further preventing the intrusion of external impurities;

[0072] The mating surfaces of the inner bearing end cover 17 and the bearing housing 10 are sealed by the first O-ring seal 9, and the mating surfaces of the outer bearing end cover 14 and the bearing housing 10 are sealed by the second O-ring seal 13. Both mating surfaces are coated with heat-resistant silicone sealant 12 to ensure that there is no oil leakage when the equipment is stopped or running at low speed.

[0073] Please see Figure 1 In this embodiment, the water-blocking ring 1 is made of stainless steel, and the water-spraying cover 2 is a split stainless steel structure. The outer diameter of the boss of the water-blocking ring 1 is 5-10mm larger than the inner diameter of the water-spraying cover 2, and the inclined surface of the boss faces the drain port 18 of the water-spraying cover 2.

[0074] Please see Figure 1 In this embodiment, the first W-shaped oil groove 5 and the second W-shaped oil groove 6 have opposite spiral directions, with a spiral helix angle of 10°-20°, and the oil groove cross-section is rectangular or trapezoidal. The groove depth of the two W-shaped oil grooves is 2-5mm, the groove width is 5-10mm, and they are both spirally distributed along the shaft 19.

[0075] Please see Figure 1 In this embodiment, the lip seal 8 is made of nitrile rubber or fluororubber, with a Shore A hardness of 70-90 and an interference fit of 0.2-0.5 mm.

[0076] Please see Figure 1 In this embodiment, the height of the boss of the labyrinth seal 7 is 2-5mm, the depth of the groove is 3-6mm, and the radial gap between adjacent bosses and grooves is 0.5-1.5mm.

[0077] Please see Figure 1In this embodiment, the inner diameter of the drain outlet 18 of the water-spraying cover 2 is 8-15mm, and the axis of the drain outlet 18 is inclined downward at an angle of 5°-15° to the horizontal plane.

[0078] Please see Figure 1 In this embodiment, the outer diameter of the oil baffle ring 3 is 2-5 mm larger than the outer diameter of the inner ring of the bearing body 15, and the thickness of the oil baffle ring 3 is 5-10 mm.

[0079] Please see Figure 1 In this embodiment, the first O-ring 9 and the second O-ring 13 are made of hydrogenated nitrile rubber with a Shore A hardness of 70-80 and a cross-sectional diameter of 3-5 mm.

[0080] Please see Figure 1 In this embodiment, the heat-resistant silicone sealant 12 has a temperature range of -40℃ to 200℃, a tensile strength ≥3MPa, and an elongation at break ≥200%.

[0081] This utility model also provides a bearing housing sealing and lubrication system, which includes the bearing housing thin oil sealing and waterproofing device as described above, and also includes a thin oil station, a pipeline system and a monitoring system.

[0082] A thin oil station includes an oil supply pump set, an oil tank, an oil cooler, an oil filtration system, and an oil-water separator;

[0083] The fuel supply pump assembly includes at least two fuel supply pumps, wherein:

[0084] The first set of oil supply pumps independently drives the lubrication points of the Yanke drying cylinder reduction gearbox, Yanke drying cylinder bearings, and vacuum roller bearings;

[0085] The second set of oil supply pumps drives the lubrication points of the bearing bodies 15 on the other rollers 20 besides the lubrication points mentioned above.

[0086] The oil tank is internally divided into an oil inlet chamber and an oil return chamber. The oil inlet chamber is connected to each lubrication point through the oil supply pipe, and the oil return chamber is connected to the oil return port 16 on each bearing housing 10 through the oil return pipe.

[0087] The oil cooler uses a plate heat exchanger and is equipped with an automatic temperature control module. The cooling water pipes of the oil cooler adopt a double sealing structure, including an inner rubber sealing ring and an outer metal bellows seal.

[0088] Oil filtration system, including coarse filter, fine filter and magnetic mesh filter;

[0089] A coarse filter with a precision of 50-100μm is located at the inlet of the oil inlet chamber;

[0090] A fine filter with a precision of 5-10μm is installed on the main oil supply line;

[0091] A magnetic mesh filter, located in the oil return chamber, is used to adsorb ferromagnetic impurities;

[0092] The oil-water separator is connected to the oil return chamber. Based on the working principle of vacuum dehydration and degassing, it removes free water, emulsified water, and most of the water and gas dissolved in the oil. It automatically starts when the moisture sensor detects that the moisture content in the oil exceeds 0.1%, and automatically stops working when the residual water content is 120ppm (0.012%), and automatically opens the bypass oil circuit.

[0093] Piping system, including main oil supply pipe and return oil pipe;

[0094] The main oil supply pipe is connected to the oil inlet 11 of each lubrication point through the oil supply branch pipe with a flow regulating valve. The oil inlet 11 is located on the upper part of the bearing housing 10.

[0095] The oil return pipe is connected to the oil return port 16 at the bottom of the bearing housing 10 and communicates with the oil return chamber of the oil tank. A one-way valve and an oil return filter are provided on the oil return pipe.

[0096] The monitoring system includes a sensor array and a host computer system.

[0097] The sensor group includes:

[0098] Temperature transmitters are installed at the oil tank, the main oil supply pipe, and the return oil port 16 of each bearing housing 10.

[0099] Pressure transmitters are installed at the oil supply pump outlet and in each oil supply branch pipe;

[0100] A moisture sensor is located in the oil return chamber and at the outlet of the oil-water separator.

[0101] The level transmitter is located on top of the oil tank;

[0102] The host computer system communicates with each sensor via signal lines and is configured with:

[0103] The oil temperature monitoring module uses a temperature probe to monitor the oil outlet temperature in real time and can automatically adjust the cooling water supply to the oil cooler to ensure that the oil outlet temperature does not exceed 50°C. When the oil temperature exceeds 70°C, an alarm is triggered to prompt the operator to check the cooling device. During the initial start-up in cold seasons such as winter, if the oil temperature is detected to be below 40°C, the electric heater in the oil tank will be started immediately to preheat the oil temperature to 40°C and then automatically stop heating.

[0104] The oil pressure monitoring module triggers an alarm and switches to the backup pump when it detects that the oil supply pressure is lower than 0.3MPa.

[0105] The moisture monitoring module automatically starts the oil-water separator when it detects that the moisture content in the oil return chamber exceeds 0.1%, and shuts it off when the moisture content is below 0.012%.

[0106] The liquid level monitoring module triggers a refueling alarm when it detects that the liquid level in the tank is below the lower limit.

[0107] Example 2: The difference from Example 1 is that:

[0108] Upgraded waterproof structural materials: Both the water-blocking ring 1 and the water-spraying cover 2 are made of 316L stainless steel, and the surface is electrolytically polished, which improves the acid corrosion resistance to twice that of conventional stainless steel, making it suitable for highly corrosive environments such as the wet end of papermaking machinery.

[0109] Enhanced sealing components: The lip seal 8 has been replaced with perfluororubber, extending the temperature range to -10℃ to 250℃ and providing stronger resistance to strong acids and alkalis; the heat-resistant silicone sealant of the static sealing components has been upgraded to food-grade, FDA certified, and meets the hygiene requirements of the food processing industry.

[0110] Lubrication system adjustment: The inner sealing ring of the cooling water pipe of the oil cooler is made of ethylene propylene diene monomer (EPDM) rubber to prevent chloride ion corrosion in the cooling water. At the same time, a pH sensor is added to the oil return chamber to monitor the corrosiveness of the oil in real time.

[0111] In this embodiment of the invention, it can operate stably in a highly corrosive environment with pH 2-12, extending the service life of the sealing components to 12,000 hours and reducing the risk of leakage and maintenance frequency caused by corrosion.

[0112] Example 3: The difference from Example 1 is that:

[0113] Dynamic sealing structure adjustment: The spiral helix angle of the first W-shaped oil groove 5 and the second W-shaped oil groove 6 is increased to 25°, the groove depth is increased to 6mm, and the spiral direction is right-handed to enhance the centrifugal force oil control effect when rotating at high speed (speed ≥ 4000r / min); the number of boss groups of the labyrinth seal 7 is increased to 5 groups, and the channel gap is reduced to 0.3mm to reduce oil leakage under high-speed conditions.

[0114] Lubrication system upgrade: The oil supply pump unit is driven by a variable frequency motor, which dynamically adjusts the oil supply volume (adjustment range 0-30L / min) according to the speed sensor signal to avoid dry friction of the bearing due to insufficient oil volume at high speed; a vortex flow meter is added to the return oil line to monitor the return oil flow in real time and feed it back to the host computer system.

[0115] In addition, in this embodiment of the invention, the monitoring system has a new function: a vibration acceleration sensor is added, which is linked with temperature and pressure parameters, and the bearing operating status is monitored in real time through spectrum analysis. When the vibration value exceeds 8.5 mm / s, an alarm is automatically triggered and the bearing is prompted to be replaced.

[0116] In this embodiment of the invention, it is applicable to high-speed rotating equipment, the oil recovery rate is increased to 95%, the bearing operating temperature is reduced by 15°C compared to Embodiment 1, and it can operate stably at a speed of 4500 r / min.

[0117] Example 4: The difference from Example 1 is that:

[0118] Intelligent lubrication system:

[0119] The oil supply pump unit is equipped with a pressure-flow dual closed-loop controller, which automatically adjusts the oil supply pump output through PLC, with a response time of <0.2s; the oil-water separation device integrates an adaptive control system, which automatically adjusts the separation efficiency according to the water content of the oil, increasing the separation speed by 30%.

[0120] Monitoring system upgrade:

[0121] The host computer system embeds an AI prediction model, which trains the bearing remaining life (RUL) algorithm using historical data. When abnormal metal abrasive concentration is detected, it provides an early warning of bearing wear failure 72 hours in advance. It supports 5G wireless communication, allowing users to remotely view real-time data and start / stop the equipment via a mobile app.

[0122] Modular structural design:

[0123] The water-spraying cover 2 has been changed to a quick-release buckle connection, reducing the disassembly time from 30 minutes to 5 minutes; the static sealing component adopts a pre-compressed O-ring module, eliminating the need to apply sealant during replacement, further improving maintenance efficiency.

[0124] In this embodiment of the invention, predictive maintenance of bearing condition can be achieved, the frequency of manual inspection is reduced by 70%, the fault response time is shortened to within 5 minutes, and the overall equipment efficiency (OEE) is improved by 12%.

Claims

1. A bearing housing thin oil sealing and waterproofing device, comprising a roller body (20) and a bearing housing (10); characterized in that: It also includes a waterproof structure, which includes a water-retaining ring (1) and a water-spraying cover (2). A water-blocking ring (1) is located between the roller body (20) and the bearing seat (10), and is fixedly connected to the end face of the roller body (20) by bolts. The water-blocking ring (1) has an annular boss on the side facing the bearing seat (10), and the annular boss is inclined at an angle of 15°-30° to the axis of the shaft body (19). The water-spraying cover (2) is fixedly connected to the outer bearing end cover (14) by bolts. The inner wall of the water-spraying cover (2) and the outer wall of the boss of the water-blocking ring (1) form an annular gap of 0.5-2mm. The bottom of the water-spraying cover (2) is provided with a drain outlet (18), which is connected to the external water collection device. The sealing structure includes an oil baffle ring (3) and an oil baffle ring (4); The oil retaining ring (3) is sleeved on the shaft body (19) and located between the bearing body (15) and the inner bearing end cover (17); The oil baffle (4) is embedded in the inner hole of the outer bearing end cover (14) and is clearance-fitted with the outer wall of the shaft (19); The first W-shaped oil groove (5) and the second W-shaped oil groove (6) are respectively opened on the outer wall of the shaft body (19). The first W-shaped oil groove (5) is located between the inner bearing end cover (17) and the bearing body (15), and the second W-shaped oil groove (6) is located between the outer bearing end cover (14) and the bearing body (15). The labyrinth seal (7) is formed by the outer peripheral boss of the inner bearing end cap (17) and the inner hole groove of the bearing seat (10), including at least 3 sets of staggered bosses and grooves to form a tortuous channel with a channel gap of 0.5-1.5mm. The lip seal (8) has an inner skeleton double lip structure and is embedded in the outer end hole of the outer bearing end cover (14). The lip is interference-fitted with the outer wall of the shaft (19) with a fit clearance ≤0.1mm. In the static sealing assembly, the mating surfaces of the inner bearing end cap (17) and the bearing housing (10) are sealed by the first O-ring seal (9), and the mating surfaces of the outer bearing end cap (14) and the bearing housing (10) are sealed by the second O-ring seal (13). Both mating surfaces are coated with heat-resistant silicone sealant (12).

2. The bearing housing thin oil sealing and waterproofing device according to claim 1, characterized in that: The water-blocking ring (1) is made of stainless steel, and the water-spraying cover (2) is a split stainless steel structure. The outer diameter of the boss of the water-blocking ring (1) is 5-10mm larger than the inner diameter of the water-spraying cover (2), and the inclined surface of the boss faces the drain outlet (18) of the water-spraying cover (2).

3. The bearing housing thin oil sealing and waterproofing device according to claim 1, characterized in that: The first W-shaped oil groove (5) and the second W-shaped oil groove (6) have opposite spiral directions, with a spiral helix angle of 10°-20°, and the oil groove cross-section is rectangular or trapezoidal. The groove depth of the two W-shaped oil grooves is 2-5mm, the groove width is 5-10mm, and they are both spirally distributed along the circumference of the shaft (19).

4. The bearing housing thin oil sealing and waterproofing device according to claim 1, characterized in that: The lip seal (8) is made of nitrile rubber or fluororubber with a hardness of Shore A 70-90 and an interference fit of 0.2-0.5mm.

5. The bearing housing thin oil sealing and waterproofing device according to claim 1, characterized in that: The height of the boss of the labyrinth seal (7) is 2-5mm, the depth of the groove is 3-6mm, and the radial gap between adjacent bosses and grooves is 0.5-1.5mm.

6. The bearing housing thin oil sealing and waterproofing device according to claim 1, characterized in that: The inner diameter of the drain outlet (18) of the water-splashing cover (2) is 8-15mm, and the axis of the drain outlet (18) is inclined downward at an angle of 5°-15° to the horizontal plane.

7. The bearing housing thin oil sealing and waterproofing device according to claim 1, characterized in that: The outer diameter of the oil baffle ring (3) is 2-5 mm larger than the outer diameter of the inner ring of the bearing body (15), and the thickness of the oil baffle ring (3) is 5-10 mm.

8. The bearing housing thin oil sealing and waterproofing device according to claim 1, characterized in that: The first O-ring (9) and the second O-ring (13) are made of hydrogenated nitrile rubber with a Shore A hardness of 70-80 and a cross-sectional diameter of 3-5 mm.

9. The bearing housing thin oil sealing and waterproofing device according to claim 1, characterized in that: The heat-resistant silicone sealant (12) has a temperature range of -40℃ to 200℃, a tensile strength of ≥3MPa, and an elongation at break of ≥200%.

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