Oil leakage prevention sealing structure for bearing seat of drying hammer crusher
By designing a sealing mechanism and oil return device on the bearing seat of the drying hammer crusher, the oil leakage problem caused by wear is solved, and the effective collection and reuse of lubricating oil is achieved, which reduces production costs and improves safety.
Patent Information
- Application Number
- CN202420867151.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-24
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-04-24
AI Technical Summary
Large drying hammer crusher causes oil leakage in the bearing seat due to wear during operation. The existing solutions cannot completely solve the oil leakage problem, resulting in high production costs.
An oil leakage-proof sealing structure for the bearing seat of the drying hammer crusher is designed, including installing a sealing mechanism outside the end cover of the bearing seat, installing two skeleton oil seals, and setting up an oil return device to collect leaked lubricating oil.
It effectively prevents lubricant leakage caused by micro positive pressure in the spindle, reduces the waste of lubricant, reduces production costs, and avoids environmental pollution and safety accidents.
Smart Images
Figure CN222668899U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of electric power chemical equipment, and in particular relates to an oil leakage prevention sealing structure for a bearing seat of a drying hammer crusher. Background Art
[0002] Drying hammer crusher is a kind of equipment used for drying and crushing light industrial waste residue with high moisture content in chemical, electric power, biological, cement and other industries, integrating drying and crushing. The bearing seats of large-scale drying hammer crusher or similar equipment are generally lubricated by forced lubrication of oil stations. There are only simple seals on both sides of the bearings. During the operation of the equipment, the drying hammer crusher will vibrate, which will cause wear on the main shaft and sealing parts. When the main shaft and the oil seal lip are worn to a certain extent, oil leakage will inevitably occur.
[0003] At present, the method to solve the oil leakage of the bearing seat is basically to find a skeleton oil seal with better quality and wear resistance or to install an oil retaining ring on the main shaft, but none of them can completely solve the oil leakage problem. In order to maintain production, the lubricating oil needs to be regularly replenished, and the production cost is high. Therefore, the thin oil lubrication has to be changed to grease lubrication. The lubricating effect of grease is not as good as that of thin oil, and it accelerates the wear of bearings and other components, forming a vicious circle, which also greatly increases the production cost. Utility Model Content
[0004] The utility model aims to provide an oil leakage prevention sealing structure for a bearing seat of a drying hammer crusher, which solves the problem of oil leakage of the bearing seat caused by wear during operation of a large drying hammer crusher.
[0005] The technical scheme adopted by the utility model is to provide an oil leakage prevention device for a bearing seat of a drying hammer crusher, comprising a bearing seat, end covers are respectively arranged at both ends of the bearing seat, a circular sealing cover is buckled on the end cover on the side away from the crusher, a sealing cavity is formed between the sealing cover and the end cover, the rotor shaft of the crusher passes through the bearing seat, the end cover and the sealing cavity, and then passes through the center of the sealing cover, an oil return port is opened on the sealing cover body, the oil return port is located at the bottom of the sealing cavity, the oil return port is threadedly connected to an oil return hose, the other end of the oil return hose is connected to an oil return device, and the oil return device is connected to the oil tank through an oil pipe.
[0006] The utility model is also characterized in that:
[0007] A first skeleton oil seal is arranged between the inside of the sealing cover and the end cover, a second skeleton oil seal is arranged between the inside of the sealing cover and the first skeleton oil seal, and the first skeleton oil seal, the second skeleton oil seal and the sealing cover are arranged concentrically.
[0008] The oil return device comprises a receiving box, an oil pipe interface is arranged on the outer wall of the receiving box, and the oil pipe interface is connected with the oil tank through an oil pipe.
[0009] An observation port is arranged on the top of the storage box, and a ventilation cap is arranged on the top of the observation port.
[0010] A drain valve is provided at the bottom of the storage box.
[0011] A flange is welded on the outer edge of the sealing cover, screw holes corresponding to the flange are arranged on the end cover, and the sealing cover is bolted to the end cover through the flange.
[0012] The beneficial effects of the utility model are as follows: the oil leakage prevention sealing structure of the bearing seat of the drying hammer crusher is achieved by adding a sealing mechanism outside the bearing seat end cover and installing two skeleton oil seals in the sealing mechanism, so that the two skeleton oil seals form a normal pressure accommodating space, which can prevent most of the lubricating oil leaking due to the slight positive pressure in the main shaft, and at the same time an oil return device is arranged, even if a small amount of lubricating oil leaks out, it can be collected and recovered through the oil return device, so as to avoid the waste of lubricating oil, save the cost of equipment maintenance and repair, greatly save the production cost, and at the same time avoid the hidden dangers of environmental pollution, safety accidents and the like caused by the leaked lubricating oil, also improve the production working environment to a great extent, reduce the oil pollution in the workshop, ensure the physical and mental health of the workers, reduce the unnecessary workload of the workers in the production process such as replenishing oil and cleaning oil pollution, and reduce the production intensity. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 The utility model is an overall schematic diagram of the oil leakage prevention sealing structure of the bearing seat of the drying hammer crusher.
[0014] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle.
[0015] In the figure: 1. sealing cover, 2. rotor shaft, 3. oil return device, 4. oil return port, 5. oil return hose, 6. observation port, 7. storage box, 8. oil pipe interface, 9. drain valve, 10. bearing seat, 11. first skeleton oil seal, 12. second skeleton oil seal, 13. oil tank. DETAILED DESCRIPTION
[0016] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.
[0017] The utility model provides a drying hammer crusher bearing seat anti-leakage sealing structure, such as Figure 1 and Figure 2As shown, it includes a bearing seat 10, and end covers are respectively provided at both ends of the bearing seat 10. A circular sealing cover 1 is buckled on the end cover 14 on the side away from the crusher. Optionally, the bearing seat end cover 14 can be removed first during installation, and the corresponding stopper and internal thread are machined on the outside of the end cover 14 according to the size of the flange connected to the sealing cover 1. The outer edge of the sealing cover 1 can be connected to the flange by threading or welding, and screw holes corresponding to the flange are opened on the end cover 14. The sealing cover 1 is bolted to the end cover 14 through the flange so that the sealing cover 1 can be detachably connected to the end cover 14 of the bearing seat 10. A sealed cavity is formed between the sealing cover 1 and the end cover 14. An axial hole matching the rotor shaft 2 is opened at the center of the sealing cover 1. After the rotor shaft 2 of the crusher passes through the bearing seat 10, the end cover 14 and the sealed cavity, it passes through the center of the sealing cover 1. A first skeleton oil seal 11 is arranged between the inside of the sealing cover 1 and the end cover 14, and a second skeleton oil seal 12 is arranged between the inside of the sealing cover 1 and the first skeleton oil seal 11. The first skeleton oil seal 11, the second skeleton oil seal 12 and the sealing cover 1 are arranged concentrically. The two skeleton oil seals form a multi-channel sealing structure between the sealing cover 1 and the end cover 14, which further strengthens the sealing degree of the bearing seat, and forms a normal pressure accommodating space between the first skeleton oil seal 11 and the second skeleton oil seal 12. When the skeleton sealing lip of the main shaft is worn, it can effectively prevent further leakage of the lubricating oil and avoid a large amount of thin oil leakage under the condition of slight positive pressure in the main shaft. An oil return port 4 is provided on the cover body of the sealing cover 1. The oil return port 4 is located at the bottom of the sealing cavity. The oil return port 4 can use a DN20 short wire and is welded to the bottom of the outer side of the sealing cavity. The oil return port 4 is threadedly connected to the oil return hose 5. The other end of the oil return hose 5 is connected to the oil return device 3. The oil return device 3 is fixedly arranged on the bottom bracket of the bearing seat 10. The oil return device 3 is connected to the oil tank 13 through an oil pipe. Even if some lubricating oil seeps out through multiple seals, it can flow into the oil return device 3 through the oil return port 4, and then return to the oil tank 13 through the set oil pipe for recovery, and can be reused after recovery.
[0018] Among them, the oil return device 3 includes a storage box 7, and an oil return pipe interface 8 is arranged on the outer wall of the storage box 7. The oil return pipe interface 8 is connected to the oil return pipe. The other end of the oil return pipe extends to the oil return tank. The leaked lubricating oil is recovered and sent back to the oil tank through the oil return pipe. An observation port 6 is arranged on the top of the storage box 7, and a breathable cap is arranged on the observation port 6. A drain valve 9 is arranged at the bottom of the storage box 7. When in use, the storage of the lubricating oil inside the storage box 7 can be observed in time through the observation port 6. If the oil return hose 5 is found to be blocked, it can be unblocked by opening the breathable cap on the top observation port 6 for normal use. The unblocked oil and impurities can be cleaned by opening the drain valve 9 at the bottom of the storage box 7 after the equipment is operated. On the other hand, during the operation of the equipment, internal pressure will be built up in each container. If necessary, the breathable cap on the observation port 6 can be opened to balance the internal pressure to avoid accidents and ensure the normal operation of the equipment.
[0019] The utility model provides a drying hammer crusher bearing seat anti-leakage sealing structure. During the operation and production of the equipment, the end cover 14 of the bearing seat 10 performs the first sealing. When the main shaft or the bearing seat 10 skeleton sealing lip is worn, the leaked lubricating oil first flows into the sealing cavity between the sealing cover 1 and the end cover 14. Two skeleton oil seals are arranged in the sealing cavity, which can effectively play a reinforcing sealing role. A normal pressure accommodating space is formed between the two layers of skeleton oil seals, which prevents the further leakage of most of the lubricating oil. A small amount of lubricating oil at the leakage point flows out through the oil return port 4 at the bottom of the outer side of the sealing cavity, flows to the oil return device 3 for storage through the oil return hose 5, and is guided by the micro-positive pressure in the oil return device 3. The oil pipe on the outer wall of the storage box 7 returns to the oil tank 13 for recovery. Furthermore, the blockage of oil and impurities in the oil return device 3 can be observed in real time through the observation port 6 and the drain valve 9 arranged on the storage box 7, and the sewage is cleared and discharged in time to ensure the normal operation of the equipment.
[0020] The oil leakage prevention sealing structure of the bearing seat of the drying hammer crusher provided by the utility model runs smoothly during the production process, effectively prevents the oil leakage problem caused by the wear of the sealing lip of the main shaft or the bearing seat frame, and improves the operation efficiency of the crusher. The set oil return device can also further recover the leaked thin oil for a second time, eliminating the waste of lubricating oil and greatly saving production costs. More importantly, it avoids environmental pollution caused by oil leakage and safety accidents such as fire caused by overheating due to oil leakage to the transmission belt.
[0021] Example 1
[0022] The anti-leakage sealing structure of the bearing seat of the drying hammer crusher provided in Example 1 includes a bearing seat 10, and end covers are respectively arranged at both ends of the bearing seat 10. A circular sealing cover 1 is buckled on the end cover 14 on the side away from the crusher, and a flange is welded on the outer edge of the sealing cover 1. Screw holes corresponding to the flange are arranged on the end cover 14. The sealing cover 1 is bolted to the end cover 14 through the flange, and a sealed cavity is formed between the sealing cover 1 and the end cover 14. After the rotor shaft 2 of the crusher passes through the bearing seat 10, the end cover 14 and the sealed cavity, it passes through the center of the sealing cover 1. An oil return port 4 is arranged on the cover body of the sealing cover 1, and the oil return port 4 is located at the bottom of the sealed cavity. The oil return port 4 is threadedly connected to the oil return hose 5, and the other end of the oil return hose 5 is connected to the oil return device 3, and the oil return device 3 is connected to the oil tank 13 through an oil pipe.
[0023] Example 2
[0024] The anti-leakage sealing structure of the bearing seat of the drying hammer crusher provided in Example 2 includes a bearing seat 10, and end covers are respectively arranged at both ends of the bearing seat 10. A circular sealing cover 1 is buckled on the end cover 14 on the side away from the crusher. A flange is welded on the outer edge of the sealing cover 1, and a screw hole corresponding to the flange is arranged on the end cover 14. The sealing cover 1 is bolted to the end cover 14 through the flange, and a sealed cavity is formed between the sealing cover 1 and the end cover 14. After the rotor shaft 2 of the crusher passes through the bearing seat 10, the end cover 14 and the sealed cavity, it passes through the center of the sealing cover 1. An oil return port 4 is arranged on the cover body of the sealing cover 1, and the oil return port 4 is located at the bottom of the sealed cavity. The oil return port 4 is threadedly connected to the oil return hose 5, and the other end of the oil return hose 5 is connected to the oil return device 3. The oil return device 3 includes a storage box 7, and an oil pipe interface 8 is arranged on the outer wall of the storage box 7. The oil pipe interface 8 is connected to the oil tank 13 through an oil pipe.
[0025] A first skeleton oil seal 11 is arranged between the inside of the sealing cover 1 and the end cover 14 , and a second skeleton oil seal 12 is arranged between the inside of the sealing cover 1 and the first skeleton oil seal 11 . The first skeleton oil seal 11 , the second skeleton oil seal 12 and the sealing cover 1 are arranged concentrically.
[0026] Example 3
[0027] The anti-leakage sealing structure of the bearing seat of the drying hammer crusher provided in Example 3 includes a bearing seat 10, and end covers are respectively arranged at both ends of the bearing seat 10. A circular sealing cover 1 is buckled on the end cover 14 on the side away from the crusher. A flange is welded on the outer edge of the sealing cover 1, and a screw hole corresponding to the flange is arranged on the end cover 14. The sealing cover 1 is bolted to the end cover 14 through the flange, and a sealed cavity is formed between the sealing cover 1 and the end cover 14. After the rotor shaft 2 of the crusher passes through the bearing seat 10, the end cover 14 and the sealed cavity, it passes through the center of the sealing cover 1. An oil return port 4 is arranged on the cover body of the sealing cover 1. The oil return port 4 is located at the bottom of the sealed cavity. The oil return port 4 is threadedly connected to the oil return hose 5, and the other end of the oil return hose 5 is connected to the oil return device 3. The oil return device 3 includes a storage box 7, and an oil pipe interface 8 is arranged on the outer wall of the storage box 7. The oil pipe interface 8 is connected to the oil tank 13 through an oil pipe. An observation port 6 is arranged on the top of the storage box 7, a breathable cap is arranged on the top of the observation port 6, and a drain valve 9 is arranged at the bottom of the storage box 7.
[0028] A first skeleton oil seal 11 is arranged between the inside of the sealing cover 1 and the end cover 14 , and a second skeleton oil seal 12 is arranged between the inside of the sealing cover 1 and the first skeleton oil seal 11 . The first skeleton oil seal 11 , the second skeleton oil seal 12 and the sealing cover 1 are arranged concentrically.
Claims
1. The anti-leakage oil sealing structure of the bearing seat of the drying hammer crusher is characterized by: The invention comprises a bearing seat (10), wherein end covers are respectively arranged at both ends of the bearing seat (10), and a circular sealing cover (1) is buckled on the end cover (14) on the side away from the crusher, and a sealed cavity is formed between the sealing cover (1) and the end cover (14). After the rotor shaft (2) of the crusher passes through the bearing seat (10), the end cover (14) and the sealed cavity, it passes through the center of the sealing cover (1), and an oil return port (4) is opened on the cover body of the sealing cover (1). The oil return port (4) is located at the bottom of the sealed cavity, and the oil return port (4) is threadedly connected to an oil return hose (5). The other end of the oil return hose (5) is connected to an oil return device (3), and the oil return device (3) is connected to an oil tank (13) through an oil pipe.
2. The anti-leakage oil sealing structure of the bearing seat of the drying hammer crusher according to claim 1 is characterized in that: A first skeleton oil seal (11) is arranged between the interior of the sealing cover (1) and the end cover (14), and a second skeleton oil seal (12) is arranged between the interior of the sealing cover (1) and the first skeleton oil seal (11); the first skeleton oil seal (11), the second skeleton oil seal (12) and the sealing cover (1) are arranged concentrically.
3. The anti-leakage oil sealing structure of the bearing seat of the drying hammer crusher according to claim 2 is characterized in that: The oil return device (3) comprises a storage box (7), an oil pipe interface (8) is provided on the outer wall of the storage box (7), and the oil pipe interface (8) is connected to the oil tank (13) through an oil pipe.
4. The anti-leakage oil sealing structure of the bearing seat of the drying hammer crusher according to claim 3 is characterized in that: The top of the storage box (7) is provided with an observation port (6), and the top of the observation port (6) is provided with a ventilation cap.
5. The anti-leakage oil sealing structure of the bearing seat of the drying hammer crusher according to claim 3 is characterized in that: A sewage discharge valve (9) is arranged at the bottom of the storage box (7).
6. The anti-leakage oil sealing structure of the bearing seat of the drying hammer crusher according to claim 1 is characterized in that: A flange is welded to the outer edge of the sealing cover (1), and screw holes corresponding to the flange are provided on the end cover (14). The sealing cover (1) is bolted to the end cover (14) via the flange.