Self-locking double-seal end cap
By using a self-locking double-seal end cap design, adjusting the pressure plate and locking nut to press the outer ring of the bearing, combined with a double-skeletal oil seal, the problem of lubricating oil leakage caused by bearing wear in belt conveyors is solved, achieving stable bearing operation and effective sealing of lubricating oil.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA PETROLEUM & CHEMICAL CORP
- Filing Date
- 2025-06-23
- Publication Date
- 2026-06-23
AI Technical Summary
In existing technologies, wear of the input shaft bearings of belt conveyors leads to increased clearance, causing the input shaft to move erratically, resulting in lubricating oil leakage, which affects equipment operation and the environment. Furthermore, traditional felt seals are not very effective.
Design a self-locking double-seal end cap, which uses an adjusting pressure plate, a pressure cap, a locking nut, and a skeleton oil seal. The outer ring of the bearing is pressed by the locking nut and the locking back cap, and the double skeleton oil seal prevents lubricating oil leakage.
It effectively prevents bearing movement, prevents lubricant leakage, reduces lubricant filling costs, protects the environment, and ensures normal equipment operation.
Smart Images
Figure CN224397085U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sealing, specifically to a self-locking double-sealing end cap. Background Technology
[0002] Due to structural factors, the bearings on the input shaft of the belt conveyor wear after 2-3 years of operation, resulting in a 2-5mm runout. Continued use will increase this runout and runout during operation, causing oil leakage from the end cover into the gearbox. This reduces the lubricating oil in the gearbox, rendering it ineffective for lubrication. This leads to abnormal noise due to dry running and environmental pollution. The main causes are twofold: First, the input shaft bearing is a 32314 tapered roller bearing. Wear increases the clearance, leading to increased runout and wear between the journal and bearing seat. In severe cases, this can cause journal breakage, requiring shutdown for repair and impacting oil production. Second, the original design involved cutting felt into long strips at the outermost end of the end cover and forcibly inserting them into the gap between the input shaft and the end cover. After a period of operation, the felt hardens, losing its initial elasticity, and eventually, lubricating oil leaks from the end cover. For example, a search reveals that utility model patent CN211398565U discloses a sealing strip structure with a felt layer, including an edge sealing part and a contact sealing part. The contact sealing part includes an upper sealing cavity and a lower contact strip. The sealing cavity includes a smaller first sealing cavity on the left and a larger second sealing cavity on the right. The edge sealing part is fixed to the felt layer, and the felt layer completely covers the outer side of the sealing cavity. The first sealing cavity and the second sealing cavity are separated by a partition column, and an auxiliary sealing cavity with a circular opening is formed between the partition column and the second sealing cavity. The felt layer is sewn to the edge sealing part, and a ribbed structure is provided on the edge sealing part. This utility model adopts a double-chamber contact seal, combined with the compression seal of the auxiliary sealing cavity and the partition column, resulting in a good overall sealing effect. However, in essence, it is an optimized felt seal design, but it is not suitable for sealing the narrow gap between the input shaft and the end cap as described in this patent.
[0003] Therefore, the task of this utility model is to address the deficiencies of the prior art by creating a structurally sound end cap that simultaneously possesses the following basic characteristics: (1) ensuring that the bearing always operates within the standard range, avoiding shaft slippage due to increased bearing clearance; (2) ensuring effective long-term sealing measures to prevent lubricating oil leakage from the end cap. Utility Model Content
[0004] The technical problem this utility model aims to solve is to provide a structurally sound end cap that ensures the bearing always operates within its standard range, preventing shaft slippage due to increased bearing clearance, while also ensuring effective long-term sealing to prevent lubricating oil leakage from the end cap. The technical solution adopted by this utility model to solve the above-mentioned technical problem is as follows:
[0005] A self-locking double-sealed end cap includes an adjusting pressure plate, a pressure cap, an oil seal baffle, a small oil seal, a large oil seal, a locking nut, a locking back cap, a pressure cap bolt, and an oil seal baffle bolt. The outer ring of the adjusting pressure plate has a gap with the inner ring of the bearing housing, and the end face of the adjusting pressure plate is in contact with the end face of the outer ring of the bearing. An oil seal seat for installing the small oil seal is provided on the front side of the adjusting pressure plate near the bearing. The pressure cap is located behind the adjusting pressure plate, and its outer circumference is fixed to the bearing housing by pressure cap bolts. A locking nut and a locking back cap are installed on the front side of the pressure cap's central hole, and an oil seal seat for installing the large oil seal is provided on its rear side. The inner walls of the locking nut and the locking back cap have a gap with the input shaft. The locking nut and the locking back cap push forward against the adjusting pressure plate to press the outer ring of the bearing, preventing bearing displacement. The oil seal baffle is located on the oil seal side of the pressure cap, and its outer circumference is fixed to the pressure cap by oil seal baffle bolts.
[0006] Furthermore, the outer ring of the adjusting pressure plate and the inner ring of the bearing housing have a gap of 0.05 to 0.1 mm.
[0007] Furthermore, both the small oil seal and the large oil seal are skeleton oil seals.
[0008] Furthermore, the small oil seal is configured as a single oil seal.
[0009] Furthermore, the large oil seal is configured as a double oil seal.
[0010] Furthermore, the thickness of the locking nut is greater than that of the locking cap.
[0011] Furthermore, the locking nut is provided with two symmetrical blind holes.
[0012] Furthermore, the locking cap has two symmetrical through holes.
[0013] Furthermore, the adjusting pressure plate is bowl-shaped.
[0014] Furthermore, the edge of the adjusting plate is provided with two symmetrical screw holes.
[0015] Compared with the prior art, the present invention has the following main advantages:
[0016] 1. This utility model, by adding a locking nut and a locking back cap, drives the adjusting pressure plate to press the outer ring of the bearing, ensuring that the bearing always works within the standard range, avoiding the phenomenon of shaft slippage due to increased bearing clearance, reducing wear on the journal and bearing seat, preventing journal breakage, and ensuring normal crude oil production.
[0017] 2. This utility model changes the traditional method of sealing with felt strips. By adjusting the first skeleton seal of the pressure plate and the second skeleton seal of the pressure cap, it fundamentally prevents lubricating oil from leaking from the end cap, which not only reduces the cost of lubricating oil filling, but also protects the environment and ensures the normal operation of the equipment.
[0018] 3. This utility model makes the removal operation time-saving and labor-saving by setting screw holes on the adjusting pressure plate.
[0019] 4. This utility model can be widely used in the treatment of leakage in equipment such as oil pumping units. Attached Figure Description
[0020] Figure 1 This is an exploded structural diagram of the present invention;
[0021] Figure 2 This is a schematic diagram of the assembly structure of this utility model;
[0022] Figure 3 This is a schematic diagram of the adjusting pressure plate structure of this utility model;
[0023] In the diagram: 1-Adjusting pressure plate, 2-Locking nut, 3-Locking back cap, 4-Pressure cap, 5-Oil seal baffle, 6-Oil seal baffle bolt, 7-Input shaft, 8-Bearing seat, 9-Bearing, 10-Small oil seal, 11-Pressure cap bolt, 12-Large oil seal, 13-Conical sleeve, 14-Pulley, 15-Oil seal position, 16-Screw hole, 17-Blind hole, 18-Through hole. Detailed Implementation
[0024] The present invention will now be described in detail with reference to the embodiments and accompanying drawings. Example 1
[0025] See Figure 1 , Figure 2 and Figure 3A self-locking double-sealed end cap includes an adjusting pressure plate 1, a pressure cap 4, an oil seal baffle 5, a small oil seal 10, a large oil seal 12, a locking nut 2, a locking back cap 3, a pressure cap bolt 11, and an oil seal baffle bolt 6. The outer ring of the adjusting pressure plate 1 has a gap with the inner ring of the bearing seat 8, and the end face of the adjusting pressure plate 1 is in contact with the end face of the outer ring of the bearing 9. The adjusting pressure plate 1 has an oil seal seat for installing the small oil seal 10 near the bearing 9 on its central hole side. The pressure cap 4 is located behind the adjusting pressure plate 1, and the outer circumference of the pressure cap 4... The pressure cap 4 is fixed to the bearing housing 8 by the pressure cap bolt 11. The pressure cap 4 has a locking nut 2 and a locking back cap 3 installed on the front side of its center hole, and an oil seal seat for installing the large oil seal 12 is provided on the rear side. The inner walls of the locking nut 2 and the locking back cap 3 are both provided with a gap from the input shaft 7. The locking nut 2 and the locking back cap 3 push forward against the adjusting pressure plate 1 to press the outer ring of the bearing 9 tightly to prevent the bearing 9 from shifting. The oil seal baffle 5 is located on the oil seal side of the pressure cap 4. The outer circumference of the oil seal baffle 5 is fixed to the pressure cap 4 by the oil seal baffle bolt 6. Example 2
[0026] See Figure 1 , Figure 2 and Figure 3 A self-locking double-sealed end cap includes an adjusting pressure plate 1, a pressure cap 4, an oil seal baffle 5, a small oil seal 10, a large oil seal 12, a locking nut 2, a locking back cap 3, a pressure cap bolt 11, and an oil seal baffle bolt 6. The outer ring of the adjusting pressure plate 1 has a gap with the inner ring of the bearing seat 8, and the end face of the adjusting pressure plate 1 is in contact with the end face of the outer ring of the bearing 9. The adjusting pressure plate 1 has an oil seal seat for installing the small oil seal 10 near the bearing 9 on its central hole side. The pressure cap 4 is located behind the adjusting pressure plate 1, and the outer circumference of the pressure cap 4... The pressure cap 4 is fixed to the bearing housing 8 by the pressure cap bolt 11. The pressure cap 4 has a locking nut 2 and a locking back cap 3 installed on the front side of its center hole, and an oil seal seat for installing the large oil seal 12 is provided on the rear side. The inner walls of the locking nut 2 and the locking back cap 3 are both provided with a gap from the input shaft 7. The locking nut 2 and the locking back cap 3 push forward against the adjusting pressure plate 1 to press the outer ring of the bearing 9 tightly to prevent the bearing 9 from shifting. The oil seal baffle 5 is located on the oil seal side of the pressure cap 4. The outer circumference of the oil seal baffle 5 is fixed to the pressure cap 4 by the oil seal baffle bolt 6.
[0027] Based on the above technical solution, the following further technical measures will be adopted:
[0028] Adjust the outer ring of the pressure plate 1 to leave a gap of 0.05 to 0.1 mm between it and the inner ring of the bearing housing 8 so that the pressure plate 1 can be properly installed into the bearing housing 8. Example 3
[0029] See Figure 1 , Figure 2 and Figure 3A self-locking double-sealed end cap includes an adjusting pressure plate 1, a pressure cap 4, an oil seal baffle 5, a small oil seal 10, a large oil seal 12, a locking nut 2, a locking back cap 3, a pressure cap bolt 11, and an oil seal baffle bolt 6. The outer ring of the adjusting pressure plate 1 has a gap with the inner ring of the bearing seat 8, and the end face of the adjusting pressure plate 1 is in contact with the end face of the outer ring of the bearing 9. The adjusting pressure plate 1 has an oil seal seat for installing the small oil seal 10 near the bearing 9 on its central hole side. The pressure cap 4 is located behind the adjusting pressure plate 1, and the outer circumference of the pressure cap 4... The pressure cap 4 is fixed to the bearing housing 8 by the pressure cap bolt 11. The pressure cap 4 has a locking nut 2 and a locking back cap 3 installed on the front side of its center hole, and an oil seal seat for installing the large oil seal 12 is provided on the rear side. The inner walls of the locking nut 2 and the locking back cap 3 are both provided with a gap from the input shaft 7. The locking nut 2 and the locking back cap 3 push forward against the adjusting pressure plate 1 to press the outer ring of the bearing 9 tightly to prevent the bearing 9 from shifting. The oil seal baffle 5 is located on the oil seal side of the pressure cap 4. The outer circumference of the oil seal baffle 5 is fixed to the pressure cap 4 by the oil seal baffle bolt 6.
[0030] Based on the above technical solution, the following further technical measures will be adopted:
[0031] Adjust the outer ring of the pressure plate 1 to leave a gap of 0.05 to 0.1 mm between it and the inner ring of the bearing housing 8 so that the pressure plate 1 can be properly installed into the bearing housing 8.
[0032] Both the small oil seal 10 and the large oil seal 12 are skeleton oil seals with excellent sealing performance. Example 4
[0033] See Figure 1 , Figure 2 and Figure 3 A self-locking double-sealed end cap includes an adjusting pressure plate 1, a pressure cap 4, an oil seal baffle 5, a small oil seal 10, a large oil seal 12, a locking nut 2, a locking back cap 3, a pressure cap bolt 11, and an oil seal baffle bolt 6. The outer ring of the adjusting pressure plate 1 has a gap with the inner ring of the bearing seat 8, and the end face of the adjusting pressure plate 1 is in contact with the end face of the outer ring of the bearing 9. The adjusting pressure plate 1 has an oil seal seat for installing the small oil seal 10 near the bearing 9 on its central hole side. The pressure cap 4 is located behind the adjusting pressure plate 1, and the outer circumference of the pressure cap 4... The pressure cap 4 is fixed to the bearing housing 8 by the pressure cap bolt 11. The pressure cap 4 has a locking nut 2 and a locking back cap 3 installed on the front side of its center hole, and an oil seal seat for installing the large oil seal 12 is provided on the rear side. The inner walls of the locking nut 2 and the locking back cap 3 are both provided with a gap from the input shaft 7. The locking nut 2 and the locking back cap 3 push forward against the adjusting pressure plate 1 to press the outer ring of the bearing 9 tightly to prevent the bearing 9 from shifting. The oil seal baffle 5 is located on the oil seal side of the pressure cap 4. The outer circumference of the oil seal baffle 5 is fixed to the pressure cap 4 by the oil seal baffle bolt 6.
[0034] Based on the above technical solution, the following further technical measures will be adopted:
[0035] Adjust the outer ring of the pressure plate 1 to leave a gap of 0.05 to 0.1 mm between it and the inner ring of the bearing housing 8 so that the pressure plate 1 can be properly installed into the bearing housing 8.
[0036] Both the small oil seal 10 and the large oil seal 12 are skeleton oil seals with excellent sealing performance.
[0037] Small oil seal 10 is set as a single oil seal. Large oil seal 12 is set as a double oil seal. Example 5
[0038] See Figure 1 , Figure 2 and Figure 3 A self-locking double-sealed end cap includes an adjusting pressure plate 1, a pressure cap 4, an oil seal baffle 5, a small oil seal 10, a large oil seal 12, a locking nut 2, a locking back cap 3, a pressure cap bolt 11, and an oil seal baffle bolt 6. The outer ring of the adjusting pressure plate 1 has a gap with the inner ring of the bearing seat 8, and the end face of the adjusting pressure plate 1 is in contact with the end face of the outer ring of the bearing 9. The adjusting pressure plate 1 has an oil seal seat for installing the small oil seal 10 near the bearing 9 on its central hole side. The pressure cap 4 is located behind the adjusting pressure plate 1, and the outer circumference of the pressure cap 4... The pressure cap 4 is fixed to the bearing housing 8 by the pressure cap bolt 11. The pressure cap 4 has a locking nut 2 and a locking back cap 3 installed on the front side of its center hole, and an oil seal seat for installing the large oil seal 12 is provided on the rear side. The inner walls of the locking nut 2 and the locking back cap 3 are both provided with a gap from the input shaft 7. The locking nut 2 and the locking back cap 3 push forward against the adjusting pressure plate 1 to press the outer ring of the bearing 9 tightly to prevent the bearing 9 from shifting. The oil seal baffle 5 is located on the oil seal side of the pressure cap 4. The outer circumference of the oil seal baffle 5 is fixed to the pressure cap 4 by the oil seal baffle bolt 6.
[0039] Based on the above technical solution, the following further technical measures will be adopted:
[0040] Adjust the outer ring of the pressure plate 1 to leave a gap of 0.05 to 0.1 mm between it and the inner ring of the bearing housing 8 so that the pressure plate 1 can be properly installed into the bearing housing 8.
[0041] Both the small oil seal 10 and the large oil seal 12 are skeleton oil seals with excellent sealing performance.
[0042] Small oil seal 10 is set as a single oil seal. Large oil seal 12 is set as a double oil seal.
[0043] The thickness of the locking nut 2 is greater than that of the locking cap 3. Example 6
[0044] See Figure 1 , Figure 2 and Figure 3A self-locking double-sealed end cap includes an adjusting pressure plate 1, a pressure cap 4, an oil seal baffle 5, a small oil seal 10, a large oil seal 12, a locking nut 2, a locking back cap 3, a pressure cap bolt 11, and an oil seal baffle bolt 6. The outer ring of the adjusting pressure plate 1 has a gap with the inner ring of the bearing seat 8, and the end face of the adjusting pressure plate 1 is in contact with the end face of the outer ring of the bearing 9. The adjusting pressure plate 1 has an oil seal seat for installing the small oil seal 10 near the bearing 9 on its central hole side. The pressure cap 4 is located behind the adjusting pressure plate 1, and the outer circumference of the pressure cap 4... The pressure cap 4 is fixed to the bearing housing 8 by the pressure cap bolt 11. The pressure cap 4 has a locking nut 2 and a locking back cap 3 installed on the front side of its center hole, and an oil seal seat for installing the large oil seal 12 is provided on the rear side. The inner walls of the locking nut 2 and the locking back cap 3 are both provided with a gap from the input shaft 7. The locking nut 2 and the locking back cap 3 push forward against the adjusting pressure plate 1 to press the outer ring of the bearing 9 tightly to prevent the bearing 9 from shifting. The oil seal baffle 5 is located on the oil seal side of the pressure cap 4. The outer circumference of the oil seal baffle 5 is fixed to the pressure cap 4 by the oil seal baffle bolt 6.
[0045] Based on the above technical solution, the following further technical measures will be adopted:
[0046] Adjust the outer ring of the pressure plate 1 to leave a gap of 0.05 to 0.1 mm between it and the inner ring of the bearing housing 8 so that the pressure plate 1 can be properly installed into the bearing housing 8.
[0047] Both the small oil seal 10 and the large oil seal 12 are skeleton oil seals with excellent sealing performance.
[0048] Small oil seal 10 is set as a single oil seal. Large oil seal 12 is set as a double oil seal.
[0049] The thickness of the locking nut 2 is greater than that of the locking cap 3.
[0050] The locking nut 2 has two symmetrical blind holes 17 to prevent lubricating oil leakage. Example 7
[0051] See Figure 1 , Figure 2 and Figure 3A self-locking double-sealed end cap includes an adjusting pressure plate 1, a pressure cap 4, an oil seal baffle 5, a small oil seal 10, a large oil seal 12, a locking nut 2, a locking back cap 3, a pressure cap bolt 11, and an oil seal baffle bolt 6. The outer ring of the adjusting pressure plate 1 has a gap with the inner ring of the bearing seat 8, and the end face of the adjusting pressure plate 1 is in contact with the end face of the outer ring of the bearing 9. The adjusting pressure plate 1 has an oil seal seat for installing the small oil seal 10 near the bearing 9 on its central hole side. The pressure cap 4 is located behind the adjusting pressure plate 1, and the outer circumference of the pressure cap 4... The pressure cap 4 is fixed to the bearing housing 8 by the pressure cap bolt 11. The pressure cap 4 has a locking nut 2 and a locking back cap 3 installed on the front side of its center hole, and an oil seal seat for installing the large oil seal 12 is provided on the rear side. The inner walls of the locking nut 2 and the locking back cap 3 are both provided with a gap from the input shaft 7. The locking nut 2 and the locking back cap 3 push forward against the adjusting pressure plate 1 to press the outer ring of the bearing 9 tightly to prevent the bearing 9 from shifting. The oil seal baffle 5 is located on the oil seal side of the pressure cap 4. The outer circumference of the oil seal baffle 5 is fixed to the pressure cap 4 by the oil seal baffle bolt 6.
[0052] Based on the above technical solution, the following further technical measures will be adopted:
[0053] Adjust the outer ring of the pressure plate 1 to leave a gap of 0.05 to 0.1 mm between it and the inner ring of the bearing housing 8 so that the pressure plate 1 can be properly installed into the bearing housing 8.
[0054] Both the small oil seal 10 and the large oil seal 12 are skeleton oil seals with excellent sealing performance.
[0055] Small oil seal 10 is set as a single oil seal. Large oil seal 12 is set as a double oil seal.
[0056] The thickness of the locking nut 2 is greater than that of the locking cap 3.
[0057] The locking nut 2 has two symmetrical blind holes 17 to prevent lubricating oil leakage.
[0058] The locking cap 3 has two symmetrical through holes 18 to meet the force requirements. Example 8
[0059] See Figure 1 , Figure 2 and Figure 3A self-locking double-sealed end cap includes an adjusting pressure plate 1, a pressure cap 4, an oil seal baffle 5, a small oil seal 10, a large oil seal 12, a locking nut 2, a locking back cap 3, a pressure cap bolt 11, and an oil seal baffle bolt 6. The outer ring of the adjusting pressure plate 1 has a gap with the inner ring of the bearing seat 8, and the end face of the adjusting pressure plate 1 is in contact with the end face of the outer ring of the bearing 9. The adjusting pressure plate 1 has an oil seal seat for installing the small oil seal 10 near the bearing 9 on its central hole side. The pressure cap 4 is located behind the adjusting pressure plate 1, and the outer circumference of the pressure cap 4... The pressure cap 4 is fixed to the bearing housing 8 by the pressure cap bolt 11. The pressure cap 4 has a locking nut 2 and a locking back cap 3 installed on the front side of its center hole, and an oil seal seat for installing the large oil seal 12 is provided on the rear side. The inner walls of the locking nut 2 and the locking back cap 3 are both provided with a gap from the input shaft 7. The locking nut 2 and the locking back cap 3 push forward against the adjusting pressure plate 1 to press the outer ring of the bearing 9 tightly to prevent the bearing 9 from shifting. The oil seal baffle 5 is located on the oil seal side of the pressure cap 4. The outer circumference of the oil seal baffle 5 is fixed to the pressure cap 4 by the oil seal baffle bolt 6.
[0060] Based on the above technical solution, the following further technical measures will be adopted:
[0061] Adjust the outer ring of the pressure plate 1 to leave a gap of 0.05 to 0.1 mm between it and the inner ring of the bearing housing 8 so that the pressure plate 1 can be properly installed into the bearing housing 8.
[0062] Both the small oil seal 10 and the large oil seal 12 are skeleton oil seals with excellent sealing performance.
[0063] Small oil seal 10 is set as a single oil seal. Large oil seal 12 is set as a double oil seal.
[0064] The thickness of the locking nut 2 is greater than that of the locking cap 3.
[0065] The locking nut 2 has two symmetrical blind holes 17 to prevent lubricating oil leakage.
[0066] The locking cap 3 has two symmetrical through holes 18 to meet the force requirements.
[0067] Adjust the pressure plate 1 to a bowl shape to enhance stability. Example 9
[0068] See Figure 1 , Figure 2 and Figure 3A self-locking double-sealed end cap includes an adjusting pressure plate 1, a pressure cap 4, an oil seal baffle 5, a small oil seal 10, a large oil seal 12, a locking nut 2, a locking back cap 3, a pressure cap bolt 11, and an oil seal baffle bolt 6. The outer ring of the adjusting pressure plate 1 has a gap with the inner ring of the bearing seat 8, and the end face of the adjusting pressure plate 1 is in contact with the end face of the outer ring of the bearing 9. The adjusting pressure plate 1 has an oil seal seat for installing the small oil seal 10 near the bearing 9 on its central hole side. The pressure cap 4 is located behind the adjusting pressure plate 1, and the outer circumference of the pressure cap 4... The pressure cap 4 is fixed to the bearing housing 8 by the pressure cap bolt 11. The pressure cap 4 has a locking nut 2 and a locking back cap 3 installed on the front side of its center hole, and an oil seal seat for installing the large oil seal 12 is provided on the rear side. The inner walls of the locking nut 2 and the locking back cap 3 are both provided with a gap from the input shaft 7. The locking nut 2 and the locking back cap 3 push forward against the adjusting pressure plate 1 to press the outer ring of the bearing 9 tightly to prevent the bearing 9 from shifting. The oil seal baffle 5 is located on the oil seal side of the pressure cap 4. The outer circumference of the oil seal baffle 5 is fixed to the pressure cap 4 by the oil seal baffle bolt 6.
[0069] Based on the above technical solution, the following further technical measures will be adopted:
[0070] Adjust the outer ring of the pressure plate 1 to leave a gap of 0.05 to 0.1 mm between it and the inner ring of the bearing housing 8 so that the pressure plate 1 can be properly installed into the bearing housing 8.
[0071] Both the small oil seal 10 and the large oil seal 12 are skeleton oil seals with excellent sealing performance.
[0072] Small oil seal 10 is set as a single oil seal. Large oil seal 12 is set as a double oil seal.
[0073] The thickness of the locking nut 2 is greater than that of the locking cap 3.
[0074] The locking nut 2 has two symmetrical blind holes 17 to prevent lubricating oil leakage.
[0075] The locking cap 3 has two symmetrical through holes 18 to meet the force requirements.
[0076] Adjust the pressure plate 1 to a bowl shape to enhance stability.
[0077] The edge of the adjusting plate 1 is provided with two symmetrical screw holes 16, which makes it convenient to remove the adjusting plate 1 during maintenance and inspection.
[0078] The basic working principle of this utility model is as follows:
[0079] During installation, a special wrench is used to tighten the two nuts (i.e., locking nut 2 and locking cap 3) onto the outer ring of bearing 9 via adjusting plate 1. When the pump is running normally (input shaft 7 rotates clockwise), the nuts can automatically tighten within a range of 6-8 mm, keeping the cup-shaped adjusting plate 1 pressed against the outer ring of bearing 9 (i.e., 32314 tapered roller bearing) for pre-tightening. This ensures that the position of bearing 9 and input shaft 7 remains within the standard acceptable range, preventing shaft slippage due to increased clearance in bearing 9. The two nuts are designed with one thick and one thin, with pin holes and a special wrench. A small oil seal 10 (∅70×∅80×5 or ∅80×∅90×5) (using a single oil seal) is installed at adjusting plate 1. This first oil seal prevents lubricating oil from leaking through the gap in the center ring of adjusting plate 1. To reduce lubricating oil leakage between adjusting plate 1 and bearing housing 8, the gap is 0.01 to 0.02 mm. The outermost end of the gland 4 is equipped with a large oil seal 12 (∅70×∅100×10 or ∅80×∅110×10) (using a double oil seal) as a second oil seal. The sealing effect of these two high-temperature resistant skeleton oil seals ensures no lubricating oil leakage. After one year of operation following installation and operation of the belt conveyor, this design showed no shaft shifting or leakage, demonstrating excellent performance. It not only reduces the frequency of lubricating oil replenishment but also protects the environment.
[0080] The sealing effect of this end cap, when used in various management areas, is far superior to that of the felt seals currently used. Furthermore, the double oil seal lip prevents external dust from entering, ensuring the cleanliness of the lubricating oil and reducing the frequency of oil changes, achieving the desired effect. If the adjusting plate 1 lacks screw holes 16, inspection and replacement can only be performed using a magnet, which is time-consuming and laborious. To facilitate maintenance and easy observation of the bearing 9, this invention features two symmetrical M8 screw holes 16 tapped at 180 degrees on the outer edge of the adjusting plate 1. When disassembling the adjusting plate 1, it can be easily removed for observation of the bearing 9.
Claims
1. A self-locking double-sealing end cap, characterized in that, The system includes an adjusting pressure plate, a pressure cap, an oil seal baffle, a small oil seal, a large oil seal, a locking nut, a locking back cap, pressure cap bolts, and oil seal baffle bolts. The outer ring of the adjusting pressure plate has a gap with the inner ring of the bearing housing, and the end face of the adjusting pressure plate is in contact with the end face of the outer ring of the bearing. An oil seal seat for installing the small oil seal is located on the front side of the adjusting pressure plate near the bearing. The pressure cap is located behind the adjusting pressure plate, and its outer circumference is fixed to the bearing housing by pressure cap bolts. A locking nut and a locking back cap are installed on the front side of the pressure cap's central hole, and an oil seal seat for installing the large oil seal is located on its rear side. The inner walls of the locking nut and the locking back cap have a gap with the input shaft. The locking nut and the locking back cap push forward against the adjusting pressure plate to press the outer ring of the bearing tightly, preventing bearing displacement. The oil seal baffle is located on the oil seal side of the pressure cap, and its outer circumference is fixed to the pressure cap by oil seal baffle bolts.
2. The self-locking double-sealing end cap according to claim 1, characterized in that, The outer ring of the adjusting pressure plate and the inner ring of the bearing housing have a gap of 0.05 to 0.1 mm.
3. The self-locking double-sealing end cap according to claim 1, characterized in that, Both the small and large oil seals are skeleton oil seals.
4. The self-locking double-sealing end cap according to claim 1, characterized in that, The small oil seal is configured as a single oil seal.
5. A self-locking double-sealed end cap according to claim 1, characterized in that, The large oil seal is configured as a double oil seal.
6. A self-locking double-sealing end cap according to claim 1, characterized in that, The thickness of the locking nut is greater than that of the locking cap.
7. A self-locking double-sealing end cap according to claim 1, characterized in that, The locking nut has two symmetrical blind holes.
8. A self-locking double-sealing end cap according to claim 1, characterized in that, The locking cap has two symmetrical through holes.
9. A self-locking double-sealing end cap according to claim 1, characterized in that, The adjusting pressure plate is bowl-shaped.
10. A self-locking double-sealing end cap according to claim 1, characterized in that, The edge of the adjusting pressure plate has two symmetrical screw holes.