Tail bearing device
By using rolling bearings and floating seal rings in the tail bearing assembly, the problems of poor sealing and rapid wear are solved, the replacement cycle of vulnerable parts is extended, the operating cost is reduced, and the equipment's operating rate is improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KUNMING CIBA MINING MACHINERY
- Filing Date
- 2025-07-23
- Publication Date
- 2026-07-21
AI Technical Summary
Existing tail bearing devices have poor sealing performance, wear out quickly, require frequent replacement of vulnerable parts, have a short service life, and occupy a large space, affecting equipment operating rate and cost.
It adopts a structure of rolling bearings and floating seal rings. The support shaft is fixed, while the outer ring of the rolling bearing rotates with the bearing body. Combined with the floating seal ring as a rotary seal, it reduces wear and can be lubricated to improve the sealing effect and service life.
It improves the service life and sealing effect of the support shaft, extends the replacement cycle of vulnerable parts, reduces operating costs, and increases the operating rate of the equipment.
Smart Images
Figure CN224533272U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of bearing technology, specifically, it relates to a tail bearing device. Background Technology
[0002] Tail bearing assemblies are crucial components of various mineral processing equipment such as trough washing machines, spiral classifiers, and spiral conveyors. Installed at the tail end of the equipment, they are immersed in liquid (slurry) and require high sealing performance. The quality of the seal directly affects the service life of the tail bearing assembly and the operating rate of the equipment. Due to the special nature of its installation location, the tail bearing assembly can only be used immersed in liquid (slurry). Existing tail bearing assemblies must be used with a centrifugal pump and a water seal system. This type of tail bearing assembly has the following problems: the support shaft and the sealing ring rotate relative to each other, and the sealing ring is mostly made of rubber, which wears down simultaneously with the support shaft. The wear rate is fast, and the sealing capacity decreases rapidly. Fine sand particles from the slurry can enter the tail bearing assembly, damaging the bearing and causing damage to the tail bearing assembly. During operation, the tail bearing cannot be replenished with lubricating oil, leading to insufficient oil and accelerated wear. Impure water in the water seal system is also a factor that damages the tail bearing. Due to the interaction of multiple factors, the service life of the tail bearing device is only 1 to 3 months, after which it must be replaced after shutdown, which is time-consuming, labor-intensive and costly; the bearing housing is large in volume and long in length, which increases the ineffective length of the water tank. Summary of the Invention
[0003] To overcome the problems existing in the background technology, this utility model discloses a tail bearing device. The tail bearing device has a bearing housing connected to a bearing body, and a support shaft is set inside the bearing housing. The support shaft is fixed and the rolling bearing is placed inside the bearing body. Instead, the outer ring of the rolling shaft rotates with the bearing body, so that the support shaft has no wear and the service life of the support shaft is improved. A floating seal ring is used as a rotary seal, which improves the sealing effect and service life by 2 to 3 times under the same working conditions. Lubricating oil can be added to the tail bearing device during operation, which increases the life cycle of the rolling bearing. The bearing body is fixed inside the main shaft of the main machine, which reduces the volume and length of the bearing housing and avoids occupying too much space. The tail bearing device has fewer vulnerable parts, and the vulnerable part "floating seal ring" has a long service life and a long replacement cycle, which improves the life cycle of the tail bearing device, reduces the use cost, and improves the operating rate of the equipment.
[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: The tail bearing assembly is characterized by comprising a bearing housing, rolling bearings, a bearing body, a support shaft, a floating seal ring, and an oil pipe assembly; the bearing housing is connected to the bearing body, the rolling bearings are disposed within the bearing body, the support shaft is disposed within the bearing housing, two sets of rolling bearings are disposed around the support shaft, a pressure cap is disposed on the side of the bearing body, an end cap is disposed on the side of the support shaft, the support shaft and the bearing housing are connected by an elastic cylindrical pin, the floating seal ring is disposed within the bearing housing and the bearing body, and the oil pipe assembly is connected to the bearing housing.
[0005] Preferably, the rolling bearing includes an outer ring, an inner ring, and rollers; the rollers are disposed between the outer ring and the inner ring.
[0006] Preferably, the floating seal ring includes a left ring and a right ring; the left ring is disposed inside the bearing housing, and the right ring is disposed inside the bearing body. The left ring includes a first friction ring and a first O-ring, and the right ring includes a first friction ring and a second O-ring.
[0007] Preferably, the bearing includes a baffle and baffle bolts; the baffle is installed on the side of the bearing body by the baffle bolts.
[0008] As a preferred embodiment, the bearing includes an arc-shaped annular groove; the arc-shaped annular groove is disposed on the side of the bearing body, and the side of the bearing body is provided with two sets of arc-shaped annular grooves.
[0009] As a preferred embodiment, the shaft hole and pin hole are provided; the shaft hole extends through the surface of the support shaft, and the pin hole extends through the outer surface of the bearing seat. After the shaft hole and pin hole coincide, an elastic cylindrical pin is inserted and installed through the pin hole.
[0010] Preferably, the bearing includes a spacer; the spacer is disposed between the two sets of rolling bearings.
[0011] Preferably, the bearing includes: end cap bolts and pressure cap bolts; the end cap is installed on the right end of the support shaft by the end cap bolts, and the pressure cap is installed on the right side of the bearing body by the pressure cap bolts.
[0012] The beneficial effects of this utility model are as follows: The bearing housing of the tail bearing device is connected to the bearing body, and the support shaft is set inside the bearing housing. The support shaft is fixed and stationary. The rolling bearing is set inside the bearing body, and the outer ring of the rolling shaft rotates with the bearing body, so that the support shaft has no wear and improves the service life of the support shaft. The floating seal ring is used as a rotary seal, which improves the sealing effect and service life by 2 to 3 times under the same working conditions. Lubricating oil can be added to the tail bearing device during operation, which increases the life cycle of the rolling bearing. The bearing body is fixed inside the main shaft of the main machine, which reduces the volume and length of the bearing housing and avoids occupying too much space. The number of vulnerable parts in the tail bearing device is reduced, and the vulnerable part "floating seal ring" has a long service life and a long replacement cycle, which improves the life cycle of the tail bearing device, reduces the use cost, and improves the operating rate of the equipment. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a magnified view of a portion of the bearing housing; Figure 3 This is a magnified view of a portion of the support shaft; Figure 4 Schematic diagram of the floating seal ring; Figure 5 This is a magnified view of a portion of the bearing housing; Figure 6 This is a schematic diagram of the structure of a rolling bearing; Figure 7 This is a schematic diagram showing the connection relationship between the oil pipe assembly and the bearing housing. In the diagram, the components are: spindle 1, spindle bolt 2, rolling bearing 3, bearing body 4, rolling bearing outer ring 5, rolling bearing inner ring 6, gland 7, gland bolt 8, end cover 9, end cover bolt 10, spacer 11, support shaft 12, floating seal ring 13, baffle 14, baffle bolt 15, sealing ring 16, bearing seat 17, elastic cylindrical pin 18, oil pipe assembly 19, water tank 20, roller 21, shaft hole 121, left ring 131, right ring 132, friction surface 133, first friction ring 1311, second O-ring 1312, first friction ring 1321, second O-ring 1322, pin hole 171, fixing bolt 172, and arc-shaped ring groove 173. Detailed Implementation
[0014] To make the above objectives, technical solutions and beneficial effects clearer and more explicit, the present invention will be described in detail below with reference to the accompanying drawings.
[0015] like Figure 1-7 As shown: The tail bearing assembly includes a rolling bearing 3, a bearing body 4, a support shaft 12, a floating seal ring 13, a sealing ring 16, a bearing seat 17, an elastic cylindrical pin 18, and an oil pipe assembly 19. The bearing housing 17 is connected to the bearing body 4. A rolling bearing 3 is disposed within the bearing body 4, and a support shaft 12 is disposed within the bearing housing 17. Two sets of rolling bearings 3 are disposed around the support shaft 12. A pressure cap 7 is disposed on the side of the bearing body 4, and an end cap 9 is disposed on the side of the support shaft 12. The support shaft 12 and the bearing housing 17 are connected by an elastic cylindrical pin 18. A floating seal ring 13 is disposed within the bearing housing 17 and the bearing body 4. An oil pipe assembly 19 is connected to the bearing housing 4. The rolling bearing 3 is disposed within the bearing body 4. The bearing housing 17 is installed within the water tank 20 by fixing bolts 172. The support shaft 12 is disposed within the bearing housing 17, and the bearing housing 17 and the support shaft 12 are fixed by elastic cylindrical pins 18. The elastic cylindrical pins 18 are disposed on the shaft... The bearing housing 17 is used to restrict the axial and radial displacement of the support shaft 12. The rolling bearing 3 consists of at least two parts, which are set on the support shaft 12 and cooperate with the bearing body 4. The two sets of rolling bearings 3 are separated by a spacer 11. The support shaft 12 is used to connect the rolling bearing 3 and the bearing housing 17 and bears the force transmission function. The pressure cap 7 is fixed on the bearing body 4 to restrict the axial displacement of the outer ring 5 of the rolling bearing. The end cap 9 is fixed on the support shaft 12 to restrict the axial displacement of the inner ring 6 of the rolling bearing. The right end of the support shaft 12 is equipped with an end cap 9 by an end cap bolt 10 to restrict the axial displacement of the inner ring 6 of the rolling bearing. The right side of the bearing body 4 is equipped with a pressure cap 7 by a pressure cap bolt 8 to restrict the axial displacement of the outer ring 5 of the rolling bearing.
[0016] The support shaft 12 and the bearing housing 17 are installed together by an elastic cylindrical pin 18. A shaft hole 121 is provided through the surface of the support shaft 12, and a pin hole 171 is provided through the outer surface of the bearing housing 17. After the shaft hole 121 and the pin hole 171 coincide, the elastic cylindrical pin 18 is inserted and installed through the pin hole 171. An annular groove is provided on the outer surface of the support shaft 12, and a sealing ring 16 is provided within the annular groove. The sealing ring 16 is used to prevent foreign objects from entering the bearing body 4 from the mating surface of the support shaft 12 and the bearing housing 17, thus preventing damage to the rolling bearing 3. The floating seal ring 13 includes a left ring 131 and a right ring 132. The left ring 131 is disposed within the bearing housing 17 and includes a first friction ring 1311 and a second O-ring 1312. The right ring 132 is disposed within the bearing body. Inside the bearing body 4, the right ring 132 includes a first friction ring 1321 and a second O-ring 1322; the friction surfaces 133 of the left ring 131 and the right ring 132 of the bearing body 4 are in contact with each other. The first friction ring 1311, the second O-ring 1312, the second friction ring 1321, and the second friction ring 1322 are cast from wear-resistant materials such as high-nickel alloy, which have good wear resistance and are ground with friction surfaces 133 to ensure good sealing performance. The side of the bearing body 4 is provided with two sets of arc-shaped ring grooves 173. When assembling the left ring 131 and the right ring 132, the arc-shaped ring grooves 173 can prevent the first O-ring 1312 on the left ring 131 from falling off the first friction ring 1311 and prevent the first O-ring 1312 on the right ring 132 from falling off the second friction ring 1311.
[0017] The baffle 14 is made of wear-resistant rubber and other materials. The baffle 14 is installed on the bearing body 4 by the baffle bolt 15. It is used to cover the movable gap between the bearing body 4 and the bearing seat 17, prevent large foreign objects from contacting the floating seal ring 13, and improve the service life of the floating seal ring 13. The oil pipe assembly 19 is set on the bearing seat 17 and is laid to the outside of the water tank 20 with a high-pressure hose, so as to facilitate the addition of lubricating oil to the tail bearing device.
[0018] The tail bearing disclosed in this application can be installed on the main shaft of a trough-type ore washing machine or a spiral classifier. The main shaft 1 is set inside the water tank 20 of the trough-type ore washing machine or spiral classifier. The bearing body 4 of the tail bearing device is fixed on the main shaft 1. The bearing body 4 is connected to the main shaft 1 by a main shaft bolt 2. A rolling bearing 3 is set inside the bearing body 4. A bearing seat 17 is fixed inside the water tank 20. The support shaft 12 is fixed to the bearing seat 17 by a flexible cylindrical pin 18. The left ring 131 of the floating seal ring 13 is set inside the bearing seat 17, and the right ring 132 of the floating seal ring 13 is set inside the shaft. Inside the bearing body 4, the friction surfaces 133 of the left ring 131 and the right ring 132 are in contact with each other. When the main shaft 1 rotates, the bearing body 4 rotates with the main shaft 1, the outer ring 5 of the rolling bearing rotates with the bearing body 4, the support shaft 12 remains stationary, the right ring 132 rotates, and the left ring 131 does not rotate. The friction surfaces 133 of the right ring 132 and the left ring 131 generate sliding friction. Because the friction surfaces 133 of the right ring 132 and the left ring 131 have high cleanliness and tight contact, foreign objects can be prevented from entering the interior of the bearing body 4 through the friction surfaces 133. Because the first O-ring 1312 and the second O-ring 1322 are made of nitrile rubber and have elasticity, when the bearing body 4 rotates and causes vibration, the first O-ring 1312 and the second O-ring 1322 can compensate for the gap caused by the vibration of the bearing body 4, thereby preventing leakage of the floating seal ring 13. Furthermore, the first O-ring 1312 and the second O-ring 1322 also seal the arc-shaped annular groove 173 of the bearing housing 17 and the bearing body 4. Since the first O-ring 1312 and the second O-ring 1322 do not undergo relative rotational movement, wear on the first O-ring 1312 and the second O-ring 1322 is avoided. The sealing ring 16 seals the gap between the bearing housing 17 and the support shaft 12, thus achieving a seal for the tail bearing assembly.
[0019] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.
Claims
1. A tail bearing device, characterized in that: The system includes a bearing housing, rolling bearings, a bearing body, a support shaft, a floating seal ring, and an oil pipe assembly. The bearing housing is connected to the bearing body, the rolling bearings are housed within the bearing body, and the support shaft is housed within the bearing housing. Two sets of rolling bearings are provided, with the two sets of rolling bearings located around the support shaft. A pressure cap is provided on the side of the bearing body, and an end cap is provided on the side of the support shaft. The support shaft and the bearing housing are connected by a flexible cylindrical pin. The floating seal ring is located within both the bearing housing and the bearing body, and the oil pipe assembly is connected to the bearing housing.
2. The tail bearing device according to claim 1, characterized in that: The rolling bearing includes: an outer ring, an inner ring, and rollers; the rollers are disposed between the outer ring and the inner ring.
3. The tail bearing device according to claim 1, characterized in that: The floating seal ring includes a left ring and a right ring; the left ring is disposed inside the bearing housing, and the right ring is disposed inside the bearing body. The left ring includes a first friction ring and a first O-ring, and the right ring includes a first friction ring and a second O-ring.
4. A tail bearing device according to claim 1, characterized in that: include: baffle, baffle bolts; The baffle is installed on the side of the bearing body by baffle bolts.
5. A tail bearing device according to claim 1, characterized in that: include: Arc-shaped annular groove; the arc-shaped annular groove is provided on the side of the bearing body, and two sets of arc-shaped annular grooves are provided on the side of the bearing body.
6. A tail bearing device according to claim 1, characterized in that: include: Shaft hole, pin hole; The shaft hole extends through the surface of the support shaft, and the pin hole extends through the outer surface of the bearing seat. After the shaft hole and the pin hole coincide, the elastic cylindrical pin is inserted and installed through the pin hole.
7. A tail bearing device according to claim 1, characterized in that: include: Spacer ring; the spacer ring is disposed between two sets of rolling bearings.
8. A tail bearing device according to claim 1, characterized in that: include: End cap bolts and pressure cap bolts; the end cap is installed on the right end of the support shaft by end cap bolts, and the pressure cap is installed on the right side of the bearing body by pressure cap bolts.