Self-lubricating sealing bearing assembly

Abstract

The utility model discloses a self-lubricating sealing bearing assembly, and belongs to the technical field of self-lubricating bearings. The sealing structure comprises a bearing body arranged on a main shaft, a movable sealing piece positioned between the bearing body and the main shaft, a bushing gland fixed on the bearing body by adopting a bolt, and a rubber sealing ring positioned between the bearing gland and the main shaft, the micropore shaft sleeve and the polytetrafluoroethylene bushing are located in an annular gap between the main shaft and the bearing body, an automatic oil injector and an oil injection hole are arranged on the side edge of the bearing body, and the automatic oil injector is communicated with the annular gap between the main shaft and the bearing body through the oil injection hole. The fully-closed self-lubricating bearing adopts the structural design of the fully-closed self-lubricating bearing, the sealing performance is improved by matching with the secondary sealing and the movable sealing element at the end part, and the reliability of the self-lubricating bearing can be improved and the service life of the self-lubricating bearing can be prolonged while the water retaining, sealing and self-lubricating functions are realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the related technical field of self-lubricating bearing, especially to a self-lubricating sealed bearing assembly. BACKGROUND

[0002] At present, with the development of industrial equipment, the cooling tower is widely used in the field of electric power, chemical industry, cooling air conditioning and the like, and the fan and the motor bearing of the cooling tower are exposed to the hot and humid environment for a long time. Due to the humid environment, the bearings supporting the fan shaft are damaged due to moisture in a short time, and the rust damage problem of the bearings is increasingly serious, resulting in increased maintenance cost and reduced operation efficiency. According to statistics, the downtime caused by bearing failure accounts for as high as 30% of the total downtime every year. This not only affects the stable operation of the cooling tower system, but also poses a potential threat to production safety.

[0003] The bearing lubrication mainly includes grease lubrication and oil lubrication. The grease lubrication needs to be regularly filled with lubricating grease, and the oil lubrication needs to set up a slinger pump or immerse the bearing in an oil pool for forced lubrication through an oil wedge. The oil liquid will also be strongly splashed, which not only wastes lubricating oil but also pollutes the environment. Under the two lubrication modes, the bearing lubrication effect is not ideal. In order to solve the problems existing in the prior art, the self-lubricating bearing provided in Chinese patent CN221547658U realizes self-compensation of the lubricant. However, since multiple oil grooves need to be arranged inside the bearing outer ring to realize the self-lubrication function, the end cover is sealed by a skeleton oil seal. After a long time of operation and wear, the sealing surface leaks water and oil, resulting in unsatisfactory sealing performance and water blocking performance. SUMMARY

[0004] The utility model provides a kind of self-lubricating sealed bearing assembly, to solve the above technical problems.

[0005] The specific technical scheme provided by the utility model is as follows:

[0006] The self-lubricating sealed bearing assembly provided by the utility model includes a bearing body mounted on a main shaft, a dynamic seal located between the bearing body and the main shaft, a shaft bushing cover fixed on the bearing body by bolts, a rubber seal ring located between the bearing cover and the main shaft, a microporous shaft sleeve and a polytetrafluoroethylene shaft bushing located in the annular gap between the main shaft and the bearing body. The side of the bearing body is provided with an automatic oiler and an oil injection hole, and the automatic oiler is connected with the annular gap between the main shaft and the bearing body through the oil injection hole.

[0007] Optionally, the micro-hole sleeve is arranged close to the bearing body, the polytetrafluoroethylene shaft liner is arranged close to the main shaft, the main shaft is provided with a shaft shoulder, and the dynamic seal is limited by the shaft shoulder and the bearing body.

[0008] Optionally, the dynamic seal is a double-mirror seal arranged in a sealing groove of the bearing body.

[0009] Optionally, the lower end of the micro-hole sleeve is provided with an O-shaped sealing ring between the polytetrafluoroethylene shaft liner and the bearing body.

[0010] Optionally, the upper end of the micro-hole sleeve is provided with a polytetrafluoroethylene sealing pad between the polytetrafluoroethylene shaft liner and the bearing body.

[0011] Optionally, the shaft liner gland is provided with a convex column abutting on the polytetrafluoroethylene sealing pad, and the polytetrafluoroethylene sealing pad and the O-shaped sealing ring are arranged at two ends of the micro-hole sleeve respectively.

[0012] Optionally, the upper end of the polytetrafluoroethylene shaft liner is provided with a locking round nut fixed on the main shaft by screw connection.

[0013] Optionally, the locking round nut and the shaft shoulder cooperate to fix the polytetrafluoroethylene shaft liner and the main shaft.

[0014] Optionally, the micro-hole sleeve and the polytetrafluoroethylene shaft liner are both provided with lubricating holes, and the projections of the lubricating holes arranged on the micro-hole sleeve and the polytetrafluoroethylene shaft liner on the main shaft do not overlap.

[0015] The utility model has the advantages of the following beneficial technical effects:

[0016] The utility model discloses a self -lubricating sealing bearing assembly, including the bearing body of installation on the main shaft, the dynamic seal between the bearing body and the main shaft, the shaft liner gland fixed on the bearing body with bolt, the rubber sealing ring between the bearing gland and the main shaft, the micro -hole sleeve and polytetrafluoroethylene shaft liner in annular gap between the main shaft and the bearing body, the side of bearing body is provided with automatic oiler and oil injection hole, and the automatic oiler is connected with the annular gap between the main shaft and the bearing body through the oil injection hole, and it adopts the self -lubricating bearing structure design of full -enclosed type, and the improvement of sealing performance is realized to the secondary sealing and dynamic seal of cooperation end portion, can improve the reliability and service life of self -lubricating bearing when realizing water retaining, sealing and self -lubricating function. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic cross-sectional view of a self-lubricating sealed bearing assembly according to an embodiment of the present invention;

[0019] Figure 2 This is a structural schematic diagram of a dynamic seal according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0021] The following will be combined Figure 1~Figure 2 A self-lubricating sealed bearing assembly according to an embodiment of the present utility model is described in detail.

[0022] refer to Figure 1 、 Figure 2 As shown, a self-lubricating sealed bearing assembly provided by an embodiment of the present invention includes a bearing body 2 installed on a main shaft 1, a dynamic seal 3 located between the bearing body 2 and the main shaft 1, a shaft liner cover 5 fixed to the bearing body 2 by bolts 4, a rubber sealing ring 6 located between the bearing cover 5 and the main shaft 1, a microporous shaft sleeve 7 and a polytetrafluoroethylene shaft sleeve 8 located in the annular gap between the main shaft 1 and the bearing body 2, an automatic oiler 9 and an oil filling hole 10 are provided on the side of the bearing body 2, the automatic oiler 9 is connected to the annular gap between the main shaft 1 and the bearing body 2 through the oil filling hole 10, and then the self-lubrication of the microporous shaft sleeve 7 and the polytetrafluoroethylene shaft sleeve 8 located in the annular gap between the main shaft 1 and the bearing body 2 can be achieved by the automatic oiler 9.

[0023] refer to Figure 1 、 Figure 2As shown, the microporous sleeve 7 is positioned near the bearing body 2, and the polytetrafluoroethylene bushing 8 is positioned near the main shaft 1. That is, the microporous sleeve 7 is located outside the polytetrafluoroethylene bushing 8, and there is sliding contact between the microporous sleeve 7 and the polytetrafluoroethylene bushing 8. A shoulder 11 is provided on the main shaft 1, and the dynamic seal 3 is limited by the shoulder 11 and the bearing body 2. The dynamic seal 3 is a double-mirror seal, which is installed in a sealing groove 12 provided on the bearing body 2 using the shoulder 11. That is, the sealing groove 12 and the shoulder 11 cooperate with each other to limit the dynamic seal 3 between the main shaft 1 and the bearing body 2.

[0024] refer to Figure 1 、 Figure 2 As shown, the lower end of the microporous sleeve 7 is provided with an O-ring 13, which is located between the PTFE bushing 8 and the bearing body 2. The upper end of the microporous sleeve 7 is provided with a PTFE sealing gasket 14, which is located between the PTFE bushing 8 and the bearing body 2. The bushing gland 5 is provided with a boss 15, which abuts the PTFE sealing gasket 14. The PTFE sealing gasket 14 and the O-ring 13 are respectively located at the two ends of the microporous sleeve 7. The boss 15 realizes axial positioning of the PTFE sealing gasket 14 and the PTFE sealing gasket 14 and the O-ring 13 provide internal sealing.

[0025] refer to Figure 1 、 Figure 2 As shown, the upper end of the polytetrafluoroethylene bushing 8 is provided with a locking round nut 16, and the locking round nut 16 is fixed to the main shaft 1 by a threaded connection. The locking round nut 16 and the shaft shoulder 11 cooperate with each other to achieve the fixation between the polytetrafluoroethylene bushing 8 and the main shaft 1. Lubrication holes 17 are provided on both the microporous sleeve 7 and the polytetrafluoroethylene bushing 8. The projections of the lubrication holes provided on the microporous sleeve 7 and the lubrication holes provided on the polytetrafluoroethylene bushing 8 on the main shaft 1 do not overlap, that is, the lubrication holes provided on the microporous sleeve 7 and the lubrication holes provided on the polytetrafluoroethylene bushing 8 are staggered at intervals. Such an arrangement can improve the self-lubricating effect between the microporous sleeve 7 and the polytetrafluoroethylene bushing 8.

[0026] The utility model discloses an embodiment provides a kind of self-lubricating sealed bearing assembly, including the bearing body being installed on main shaft, between the bearing body and the dynamic seal member of main shaft, the shaft bushing gland being fixed on the bearing body using bolt, between the bearing gland and the rubber seal ring of main shaft, microporous shaft sleeve and polytetrafluoroethylene shaft bushing in the annular gap between the main shaft and the bearing body, the side of the bearing body is provided with automatic oiler and oil injection hole, the automatic oiler is connected with the annular gap between the main shaft and the bearing body through the oil injection hole, it adopts the structure design of full-closed self-lubricating bearing, and the improvement of sealing performance is realized in coordination secondary seal and dynamic seal member of end portion, while realizing water retaining, sealing and self-lubricating function, the reliability and service life of self-lubricating bearing can also be improved.

[0027] The utility model discloses an embodiment provides a kind of self-lubricating sealed bearing assembly, solves the problem that cooling tower fan main bearing and motor bearing are frequently corroded and damaged due to long-term in humid environment, it adopts the structure design of full-closed self-lubricating bearing, fundamentally solves these difficulties by innovative secondary seal technology, improves the stability and reliability of mechanical system. The sealing assembly is divided into fixed end and assembly end two parts, and each end is divided into inner and outer two layers of seal, the outer seal of fixed end is dynamic seal member, double mirror surface sealing piece adopts hard alloy skeleton 9Cr18, 1Cr13 cobalt-chromium-tungsten material of surfacing, friction pair is graphite, and two mirror surfaces are processed with high precision, and mirror surface sealing ring has two functions, one is to play the role of double-sided sealing, and the other can be used as low-load axial thrust bearing;The inner seal is soft seal. The outer seal of assembly end is in the O-shaped groove in the shaft bushing gland inner ring, and the inner seal material is PTFE, which has very low friction coefficient, good self-lubricating performance, high temperature resistance, corrosion resistance, good elasticity and good sealing effect, etc.

[0028] The utility model discloses an embodiment provides a kind of self-lubricating sealed bearing assembly, adopts the combination of double mirror surface sealing piece, polytetrafluoroethylene shaft bushing and self-lubricating sealing grease, has very low friction coefficient, good corrosion resistance and high temperature resistance, so that the bearing can maintain efficient operation in harsh working environment, reduce maintenance cost.

[0029] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A self-lubricating sealed bearing assembly, characterized in that: The self-lubricating sealed bearing assembly includes a bearing body mounted on the main shaft, a dynamic seal located between the bearing body and the main shaft, a bearing cover fixed to the bearing body by bolts, a rubber sealing ring located between the bearing cover and the main shaft, a microporous sleeve and a polytetrafluoroethylene bushing located in the annular gap between the main shaft and the bearing body, an automatic oiler and an oil filling hole are provided on the side of the bearing body, and the automatic oiler is connected to the annular gap between the main shaft and the bearing body through the oil filling hole.

2. The self-lubricating sealed bearing assembly according to claim 1, characterized in that: The microporous sleeve is arranged close to the bearing body, the polytetrafluoroethylene bushing is arranged close to the main shaft, a shaft shoulder is arranged on the main shaft, and the dynamic seal is limited by the shaft shoulder and the bearing body.

3. The self-lubricating sealed bearing assembly according to claim 2, characterized in that: The dynamic seal is a double-mirror seal, and the double-mirror seal is installed in a sealing groove provided on the bearing body by using the shaft shoulder.

4. The self-lubricating sealed bearing assembly according to claim 3, characterized in that: An O-type sealing ring is provided at the lower end of the microporous sleeve, and the O-type sealing ring is located between the polytetrafluoroethylene bushing and the bearing body.

5. The self-lubricating sealed bearing assembly according to claim 4, characterized in that: A polytetrafluoroethylene sealing gasket is provided at the upper end of the microporous sleeve, and the polytetrafluoroethylene sealing gasket is located between the polytetrafluoroethylene bushing and the bearing body.

6. The self-lubricating sealed bearing assembly according to claim 5, characterized in that: The bearing gland is provided with a convex column, which abuts against the polytetrafluoroethylene sealing gasket. The polytetrafluoroethylene sealing gasket and the O-ring are respectively located at two ends of the microporous sleeve.

7. The self-lubricating sealed bearing assembly according to claim 5, characterized in that: A locking round nut is provided at the upper end of the polytetrafluoroethylene bushing, and the locking round nut is fixed on the main shaft by threaded connection.

8. The self-lubricating sealed bearing assembly according to claim 7, characterized in that: The locking round nut and the shaft shoulder cooperate with each other to achieve fixation between the tetrafluoroethylene bushing and the main shaft.

9. The self-lubricating sealed bearing assembly according to claim 7, characterized in that: Lubrication holes are provided on both the microporous sleeve and the polytetrafluoroethylene bushing, and the projections of the lubrication holes provided on the microporous sleeve and the lubrication holes provided on the polytetrafluoroethylene bushing on the main shaft do not overlap.

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