High-bearing-capacity self-lubricating dustproof type fan shaft assembly with double tapered roller bearings

Abstract

The utility model relates to a high-load-bearing self-lubricating dustproof type fan shaft assembly with double tapered roller bearings, which is characterized by comprising a belt pulley and a fan shaft, a cylindrical boss is arranged at the center of the belt pulley, a cylindrical counter bore is arranged in the cylindrical boss along the axis, two bearings are arranged on two sides of the cylindrical counter bore, and the fan shaft is arranged on the fan shaft. The fan shaft penetrates through two bearings, and the two bearings are sealed through oil seals and dustproof covers respectively. The open type single-row tapered roller bearing is adopted, high radial and high axial loads can be borne, and stable operation of the fan shaft assembly under complex working conditions is ensured. Grease is coated during assembly, the grease sealing performance is considered, the design of the oil seal and the dustproof cover is combined, grease leakage and impurity invasion are effectively reduced, and the service life of the bearing is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of fan shafts, in particular to a high-load self-lubricating and dust-proof double tapered roller bearing fan shaft assembly. Background Art

[0002] With the continuous progress and development of China's industrial field, higher requirements are put forward for the reliability of engines, and the operating conditions of engines are becoming more and more severe. As a result, the silicone oil clutch fan installed on the fan shaft component at the front end of the engine to reduce the engine temperature is constantly increasing in weight. As the core component of the fan shaft component, the life of the bearing directly determines the life of the fan shaft component. The bearings used in traditional fan shaft components are difficult to bear high radial and axial loads, while the single-row tapered roller bearings used in high-speed railways, ships, amusement facilities, etc. have higher load-carrying capacities.

[0003] In workplaces such as mines, construction sites, and garbage disposal stations, the working environment is filled with a large amount of dust and mud. Once these impurities invade the bearings inside the fan shaft components, they will damage the lubrication system and material properties of the bearings, resulting in the failure of the bearings in a short time.

[0004] The failure of the bearings will not only affect the heat dissipation effect of the fan, but may also cause serious damage to the entire engine system. The traditional fan shaft components with low load-carrying capacity and low dust-proof performance can no longer fully meet the usage requirements. Therefore, how to improve the dust-proof and sealing performance of the bearings of the fan shaft components, enhance their load-carrying capacity and durability, has become an urgent problem to be solved in the current design field of fan shaft components. Content of the Utility Model

[0005] The purpose of the utility model is to provide a high-load self-lubricating and dust-proof double tapered roller bearing fan shaft assembly to solve the problems of poor dust-proof performance and high failure rate in the prior art.

[0006] The utility model is realized by the following technical solutions: A high-load self-lubricating and dust-proof double tapered roller bearing fan shaft assembly, characterized in that it includes a pulley and a fan shaft. A cylindrical boss is provided at the center of the pulley. A cylindrical counterbore is provided along the axis inside the cylindrical boss. Two bearings are provided on both sides of the cylindrical counterbore. The fan shaft passes through the two bearings, and the two bearings are respectively sealed by oil seals and dust covers.

[0007] Further, a step is provided at one end of the fan shaft. The oil seal is provided at the stepped end of the fan shaft, and the dust cover is provided at the non-stepped end of the fan shaft.

[0008] Further, a spacer is sleeved on the step of the fan shaft for fixing and supporting the fan shaft. The spacer is provided between the step of the fan shaft and the bearing.

[0009] Furthermore, a spacer sleeve is arranged between the bearings for separating the inner rings of the two bearings.

[0010] Furthermore, a pressing plate is also arranged at the end of the fan shaft without a step. A nut is arranged outside the pressing plate, and the nut is in threaded fit with the fan shaft. The two bearings are pressed and installed on the step of the fan shaft through the nut and the pressing plate.

[0011] Furthermore, the dust cover is arranged outside the pressing plate, and the oil seal is sleeved on the spacer ring.

[0012] Furthermore, the bearing is an open single-row tapered roller bearing.

[0013] For the high-load self-lubricating and dust-proof double tapered roller bearing fan shaft assembly of the present utility model, its beneficial effects include:

[0014] Improving the load-bearing capacity: By adopting an open single-row tapered roller bearing, it can withstand high radial and axial loads, ensuring the stable operation of the fan shaft assembly under complex working conditions.

[0015] Optimizing lubrication and dust prevention: Grease is applied during assembly and the grease sealing performance is considered. Combining the design of the oil seal and the dust cover can effectively reduce grease leakage and impurity intrusion, and extend the service life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. The following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0017] Figure 1 FIG. is a sectional view of a high-load self-lubricating and dust-proof double tapered roller bearing fan shaft assembly;

[0018] Figure 2 FIG. is an enlarged schematic view of the left bearing sealing structure;

[0019] Figure 3 FIG. is an enlarged schematic view of the right bearing sealing structure;

[0020] In the figure, 1 - fan shaft; 2 - pulley; 3 - spacer ring; 4 - oil seal; 5 - spacer sleeve; 6 - spacer block; 7 - screw; 8 - nut; 9 - pressing plate; 10 - dust cover; 11 - bearing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Generally, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model claimed, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0023] As Figures 1-3 shown, a high-load self-lubricating and dust-proof double-tapered roller bearing fan shaft assembly includes a pulley 2. A cylindrical boss is provided at the center of the pulley 2, and a cylindrical counterbore is provided along the axis inside the cylindrical boss. The outer rings of two open single-row tapered roller bearings 11 are press-fitted into the counterbore of the pulley 2 with interference. The open bearing 11 is a bearing 11 without a seal ring and lubricating grease. During assembly, grease needs to be applied for lubrication and the grease sealing performance needs to be considered. A fan shaft 1 is inserted into the inner bore of the bearing 11. A spacer 3 is sleeved on the bottom step of the fan shaft 1. The inner rings of the two bearings 11 are separated by a spacer sleeve 5. The inner rings of the bearings 11 are press-fitted onto the top step shaft of the fan shaft 1 through a nut 8 and a pressing plate 9. The left bearing 11 is sealed with an oil seal 4, and the right bearing 11 is sealed with a dust cover 10 to ensure that the grease does not leak during operation. At the same time, on the right side, a spacer block 6 is pressed against the end face of the pulley 2 with a screw 7. The spacer block 6 has a fan positioning step for positioning the fan, and a threaded hole on the flange surface for installing the fan on the fan shaft component.

[0024] During assembly, first, the outer rings of the two open single-row tapered roller bearings 11 are press-fitted into the counterbore of the pulley 2 with interference. Then, the fan shaft 1 is inserted into the inner bore of the bearing 11, and the spacer 3 is sleeved on the bottom step of the fan shaft 1. Next, the inner rings of the two bearings 11 are separated by a spacer sleeve 5, and the inner rings of the bearings 11 are press-fitted onto the top step shaft of the fan shaft 1 through a nut 8 and a pressing plate 9. Then, an oil seal 4 is installed on the left bearing 11 for sealing, and a dust cover 10 is installed on the right bearing 11 for sealing. Finally, the spacer block 6 is pressed against the end face of the pulley 2 with a screw 7 to complete the assembly of the entire fan shaft component assembly.

[0025] During use, since an open single-row tapered roller bearing 11 is adopted, the fan shaft component assembly can withstand the operating conditions of high radial and high axial loads. At the same time, due to the dust-proof design of the oil seal 4 and the dust cover 10, the entry of impurities such as dust and mud into the bearing interior is effectively reduced, extending the service life. In addition, since the bearing 11 is greased during assembly and the grease sealing performance is considered, the problem of grease leakage is reduced, ensuring the lubrication effect and stability of the bearing.

[0026] In the above embodiments, the basic principles, main features and advantages of the present invention are described. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, any changes and modifications made by those skilled in the art should fall within the protection scope of the appended claims of the present invention.

Claims

1. A high-load self-lubricating and dust-proof double tapered roller bearing fan shaft assembly, characterized in that, It includes a pulley (2) and a fan shaft (1). A cylindrical boss is provided at the center of the pulley (2). A cylindrical counterbore is provided along the axis inside the cylindrical boss. Two bearings (11) are provided on both sides of the cylindrical counterbore. The fan shaft (1) passes through the two bearings (11), and the two bearings (11) are respectively sealed by oil seals (4) and dust covers (10).

2. The high-load self-lubricating and dust-proof double-tapered roller bearing fan shaft assembly according to claim 1, wherein, One end of the fan shaft (1) is provided with a step. The oil seal (4) is arranged at the stepped end of the fan shaft (1), and the dust cover (10) is arranged at the non-stepped end of the fan shaft (1).

3. A high-load self-lubricating and dust-proof double tapered roller bearing fan shaft assembly according to claim 2, characterized in that, A spacer ring (3) is sleeved on the step of the fan shaft (1) for fixing and supporting the fan shaft (1). The spacer ring (3) is arranged between the step of the fan shaft (1) and the bearing (11).

4. A high-load self-lubricating and dust-proof double-tapered roller bearing fan shaft assembly according to claim 1, characterized in that, A spacer sleeve (5) is arranged between the bearings (11) for separating the inner rings of the two bearings.

5. A high-load self-lubricating and dust-proof double tapered roller bearing fan shaft assembly according to claim 3, characterized in that, A pressing plate (9) is further arranged at the non-stepped end of the fan shaft (1). A nut (8) is arranged outside the pressing plate (9). The nut (8) is in threaded cooperation with the fan shaft (1). The two bearings (11) are pressed onto the step of the fan shaft (1) by the nut (8) and the pressing plate (9).

6. The high-load self-lubricating and dust-proof double tapered roller bearing fan shaft assembly according to claim 5, wherein The dust cover (10) is arranged outside the pressing plate (9), and the oil seal (4) is sleeved on the spacer ring (3).

7. A high-load self-lubricating and dust-proof double tapered roller bearing fan shaft assembly according to claim 1, characterized in that, The bearing (11) is an open single-row tapered roller bearing.

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