Lubricating structure for bearing box of high-temperature fan

Abstract

The utility model discloses a high-temperature fan bearing box lubricating structure which comprises a gland, a supporting box, a base and a sealing mechanism. The gland is detachably connected with the supporting box to form a cylindrical box body, bearing positions are arranged on two sides of the box body, bearings are fixedly connected in the bearing positions, and the rotating shaft penetrates through the bearings to be assembled and connected with the bearings. Sealing mechanisms are arranged on the inner side and the outer side of each bearing position, the sealing mechanisms and the bearing positions jointly form a lubricating cavity, and the cavity is filled with lubricating grease. The sealing mechanism comprises an end cover, an oil seal and a sealing cover, the end cover is coaxially connected with the oil seal, the sealing cover is fixed to the end cover through a connecting bolt, and a filling port is formed in one side of the supporting box and used for supplementing lubricating grease. The lubricating structure can effectively prevent the oil leakage problem in the high-temperature environment, prolong the lubricating period, improve the operation stability of the fan bearing and prolong the service life of the fan bearing, and is suitable for fan equipment lubrication in the high-temperature environment.

Description

Technical Field

[0001] This utility model relates to the field of machinery, specifically to a lubrication structure for a high-temperature fan bearing housing. Background Technology

[0002] In high-temperature industries such as metallurgy and chemical engineering, high-temperature fans are widely used as crucial heat transfer equipment for air and gas transport in high-temperature environments. For example, in hydrogen fluoride production, high-temperature fans are used to transfer heat generated in the combustion chamber to the reactor. The fan's bearing housing, as a vital component supporting the fan shaft and reducing friction, typically requires excellent lubrication to withstand high-load operation in high-temperature environments. Currently, many high-temperature fan bearing housings use mechanical oil for lubrication. However, mechanical oil lubrication presents several problems in practical applications, particularly severe oil leakage.

[0003] Under prolonged high-temperature operation, the viscosity of the mechanical oil in the high-temperature fan bearing housing decreases, leading to poor sealing and easy lubrication leakage. Furthermore, long-term oil leakage causes oil stains to accumulate on the ground and around the equipment, increasing the burden of cleaning and maintenance and affecting the safety of the working environment. In addition, due to the unstable sealing effect of the mechanical oil lubrication system, companies typically need to replenish the lubricating oil daily to ensure the normal operation of the fan. For example, in a hydrogen fluoride production company, its high-temperature fan bearing housing uses mechanical oil lubrication, requiring approximately 15 liters of oil to be replenished daily, consuming 450 liters of mechanical oil per month, directly increasing lubrication costs.

[0004] It is evident that existing high-temperature fan bearing housing mechanical oil lubrication structures have significant drawbacks: severe oil leakage leads to environmental pollution, frequent maintenance, and increased costs. These issues have prompted the industry to urgently demand new lubrication structures that can ensure effective bearing lubrication while preventing oil leakage in high-temperature environments, thereby improving equipment safety and reducing maintenance and operating costs. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a lubrication structure for a high-temperature fan bearing housing.

[0006] This utility model is achieved through the following technical solution:

[0007] This utility model discloses a lubrication structure for a high-temperature fan bearing housing, comprising a pressure cap, a support box, a base, and a sealing mechanism. The pressure cap and the support box are detachably and fixedly connected to form a cylindrical housing. Bearing positions are provided on both sides of the housing, located at the central axis of the housing. Bearings are fixedly connected to two bearing positions, and a rotating shaft passes through the two bearings and is fitted to them. Sealing mechanisms are provided on both the inner and outer sides of each bearing position. The two sealing mechanisms and the bearing positions of the housing together form a chamber filled with grease. The base is located below the support box.

[0008] This structure effectively ensures the uniform distribution of grease around the bearing, improving lubrication and extending bearing life. Furthermore, the bearing housing arrangement meets lubrication requirements while facilitating disassembly and maintenance, minimizing disruption to equipment operation.

[0009] Furthermore, the aforementioned pressure cap and support box are each semi-cylindrical in shape, and the aforementioned bearing positions are located at both ends of the pressure cap and support box. The bearing positions of the pressure cap and support box are semi-cylindrical through holes, which together form a cylindrical cavity. The two aforementioned sealing mechanisms are located on both sides of the cylindrical cavity, arranged in a mirror symmetrical manner. The volume of the aforementioned cylindrical cavity is greater than the volume of the bearing, and its cylindrical length is greater than the thickness of the bearing. The aforementioned bearing is located at the center of the cylindrical cavity, and its circumference is fixedly connected to the cylindrical cavity through a sleeve.

[0010] This arrangement ensures that the grease is evenly filled in the gaps around the bearing, creating a stable lubrication environment and reducing frictional losses. Furthermore, the semi-cylindrical design facilitates the separation of the gland from the support housing and the replacement and maintenance of the bearing, reducing maintenance costs.

[0011] Furthermore, the aforementioned sealing mechanism includes:

[0012] The end cap includes a circular ring portion and a convex ring portion arranged coaxially. The outer diameter of the circular ring portion is larger than the diameter of the bearing position. The circular ring portion is used to form a chamber together with the bearing positions of the two sealing mechanisms and the housing. The convex ring portion is located on the side of the circular ring portion away from the bearing position.

[0013] Oil seal, wherein the oil seal is coaxially and fixedly connected to the protruding ring portion of the end cap;

[0014] The sealing cap is coaxially disposed on the side of the oil seal away from the end cover and is fixedly connected to each other by connecting bolts; there are several connecting bolts arranged in a circumferential array along the central axis of the end cover.

[0015] This design enhances the overall strength of the sealing mechanism, helps prevent grease leakage, and ensures a stable lubrication state within the chamber. Furthermore, the coaxial connection between the oil seal and the end cap further reduces seal loosening caused by vibration, thereby improving equipment reliability and seal life.

[0016] Furthermore, a grease filling port is provided at one bearing position of the aforementioned support box; the grease filling port is a threaded through hole fitted with a sealing bolt. The design of the grease filling port facilitates the replenishment of grease during equipment operation, reducing bearing wear caused by insufficient grease. The sealing bolt ensures that the sealing of the grease filling port is not affected after filling, thereby preventing grease leakage to the outside of the box.

[0017] Furthermore, the two end caps of the two sealing mechanisms located inside the support box are fixedly connected to each other by connecting rods; two connecting rods are provided, arranged in a mirror-symmetrical manner. This design ensures the stability of the sealing mechanism in high-temperature environments, helps to disperse the stress generated by bearing operation, makes the force on the end caps more uniform, further improves the sealing effect, and extends the service life of the sealing mechanism.

[0018] Furthermore, a sealing packing is provided at the connection between the end cover and the shaft. The use of the sealing packing further enhances the sealing performance at the connection between the end cover and the shaft, preventing grease leakage at high temperatures. In addition, the sealing packing has a certain degree of elasticity, which can absorb the minor vibrations generated during bearing operation, thereby reducing wear on the bearing and the sealing mechanism.

[0019] Furthermore, the aforementioned gland and support box are fixedly connected by bolts, and sealing gaskets are provided on the connection surfaces of the two. The sealing gaskets not only improve the connection strength between the gland and the support box, but also enhance its sealing performance, preventing thermal expansion under high-temperature conditions from causing the gaps at the connection surfaces to widen, and ensuring a stable and reliable lubrication environment inside the box.

[0020] The beneficial effects of this utility model are as follows:

[0021] The lubrication structure employs a combination of a sealing mechanism and a grease chamber. Through multiple sealing methods—end caps, oil seals, and sealing caps—the sealing performance of the bearing housing is significantly improved. Under high-temperature environments, the grease viscosity is more stable, making it less prone to evaporation and leakage, thus avoiding the common oil leakage problems associated with mechanical oil lubrication. This effectively maintains the cleanliness of the environment around the bearing housing, reducing oil contamination and the need for frequent cleaning.

[0022] By using grease instead of machine oil, lubrication durability is effectively improved, and the frequency of daily oil replenishment is reduced. The design includes a convenient grease filler port, simplifying operation and routine maintenance, further reducing maintenance time and costs. Compared to traditional designs that require frequent oil replenishment, this significantly reduces oil consumption and related operating costs.

[0023] This invention introduces a stable grease cavity into the high-temperature bearing housing, providing a uniform lubrication environment around the bearing, reducing bearing wear, and improving the operational stability of the fan equipment under high-temperature conditions. Simultaneously, the end caps, oil seals, and sealing caps are arranged symmetrically in a mirror-symmetric configuration with the connecting rod, enhancing the sealing structure's resistance to thermal expansion, further extending the service life of the bearings and sealing structure, and reducing the failure rate.

[0024] The sealing packing, oil seal, and multi-layer sealing structure in this invention can effectively adapt to high-temperature fluctuations and are not affected by expansion caused by high temperatures, making it particularly suitable for fan equipment operating under long-term high-temperature conditions. This design ensures stable sealing performance of the fan bearing housing, meeting the application requirements of high-temperature industrial environments.

[0025] In summary, this invention enables efficient and long-lasting lubrication of the bearing housing of high-temperature fans, avoids oil leakage problems, reduces the operating and maintenance costs of the equipment, and significantly improves the service life and working efficiency of the fan equipment. Attached Figure Description

[0026] Figure 1 : A three-dimensional structural schematic diagram of this utility model;

[0027] Figure 2 : Front view of this utility model;

[0028] Figure 3 : A cross-sectional view of this utility model;

[0029] Figure 4 : A three-dimensional structural cross-sectional view of this utility model;

[0030] Figure 5 : Schematic diagram of the internal structure of this utility model;

[0031] Figure 6 : A three-dimensional structural diagram of the sealing mechanism of this utility model;

[0032] Figure 7 : Front view of the sealing mechanism of this utility model;

[0033] Figure 8 : Exploded view of the sealing mechanism of this utility model;

[0034] In the diagram: 1-Gland, 2-Support box, 3-Base, 4-Sealing mechanism, 5-Injection port, 41-End cap, 42-Oil seal, 43-Sealing cap, 44-Connecting bolt, 21-Connecting rod, A-Shaft, B-Bearing. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0036] Example: Figure 1-8 As shown, a high-temperature fan bearing housing lubrication structure includes a pressure cover 1, a support box 2, a base 3, and a sealing mechanism 4. The pressure cover 1 and the support box 2 are detachably and fixedly connected to form a cylindrical housing. Bearing positions are provided on both sides of the housing, located at the central axis of the housing. Bearings are fixedly connected to the two bearing positions respectively, and a rotating shaft passes through the two bearings and is fitted and connected to the bearings. Sealing mechanisms 4 are provided on the inner and outer sides of each bearing position. The two sealing mechanisms 4 and the bearing positions of the housing together form a chamber filled with grease. The base 3 is located below the support box 2.

[0037] This structure effectively ensures the uniform distribution of grease around the bearing, improving lubrication and extending bearing life. Furthermore, the bearing housing arrangement meets lubrication requirements while facilitating disassembly and maintenance, minimizing disruption to equipment operation.

[0038] Furthermore, the aforementioned pressure cap 1 and support box 2 are each semi-cylindrical in shape, and the aforementioned bearing positions are located at both ends of the pressure cap 1 and support box 2. The bearing positions of the pressure cap 1 and support box 2 are semi-cylindrical through holes, which together form a cylindrical cavity. The two aforementioned sealing mechanisms 4 are located on both sides of the cylindrical cavity and are arranged in a mirror symmetrical manner. The volume of the aforementioned cylindrical cavity is greater than the volume of the bearing, and its cylindrical length is greater than the thickness of the bearing. The aforementioned bearing is located at the center of the cylindrical cavity, and its circumference is fixedly connected to the cylindrical cavity through a sleeve.

[0039] This arrangement ensures that the grease is evenly filled in the gaps around the bearing, creating a stable lubrication environment and reducing frictional losses. Furthermore, the semi-cylindrical design facilitates the separation of the gland 1 from the support box 2 and the replacement and maintenance of the bearing, reducing maintenance costs.

[0040] Furthermore, the aforementioned sealing mechanism 4 includes:

[0041] End cap 41, the end cap 41 includes a circular ring portion and a convex ring portion arranged coaxially. The outer diameter of the circular ring portion is larger than the diameter of the bearing position. The circular ring portion is used to form a chamber together with the two sealing mechanisms 4 and the bearing position of the housing. The convex ring portion is located on the side of the circular ring portion away from the bearing position.

[0042] Oil seal 42, which is coaxially and fixedly connected to the protruding ring portion of end cap 41;

[0043] The sealing cover 43 is coaxially disposed on the side of the oil seal 42 away from the end cover 41 and is fixedly connected to each other by connecting bolts 44. Several connecting bolts 44 are provided and arranged in a circular array along the central axis of the end cover 41.

[0044] This design enhances the overall strength of the sealing mechanism, helps prevent grease leakage, and ensures a stable lubrication state within the chamber. Furthermore, the coaxial connection between the oil seal 42 and the end cap 41 further reduces seal loosening caused by vibration, thereby improving the reliability of equipment operation and the lifespan of the seal.

[0045] Furthermore, a grease filling port 5 is provided at one bearing position of the aforementioned support box 2; the grease filling port 5 is a threaded through hole fitted with a sealing bolt. The design of the grease filling port 5 facilitates the replenishment of grease during equipment operation, reducing bearing wear caused by insufficient grease. The sealing bolt ensures that the sealing of the filling port is not affected after filling, thereby preventing grease from leaking to the outside of the box.

[0046] Furthermore, the two end caps 41 of the two sealing mechanisms 4 located inside the support box 2 are fixedly connected to each other by connecting rods 21; there are two connecting rods 21 arranged in a mirror symmetrical manner. This design ensures the stability of the sealing mechanism 4 in high-temperature environments, helps to disperse the stress generated by the bearing operation, makes the end caps 41 more evenly stressed, further improves the sealing effect, and extends the service life of the sealing mechanism 4.

[0047] Furthermore, a sealing packing is provided at the connection between the end cover 41 and the shaft. The use of the sealing packing further enhances the sealing performance at the connection between the end cover and the shaft, preventing grease leakage at high temperatures. In addition, the sealing packing has a certain degree of elasticity, which can absorb the minor vibrations generated during bearing operation, thereby reducing wear on the bearing and the sealing mechanism.

[0048] Furthermore, the aforementioned gland 1 and support box 2 are fixedly connected by bolts, and sealing gaskets are provided on the connection surfaces of the two. The sealing gaskets not only improve the connection strength between the gland and the support box, but also enhance its sealing performance, preventing thermal expansion under high-temperature conditions from causing the gaps on the connection surfaces to widen, and ensuring a stable and reliable lubrication environment inside the box.

[0049] In summary, this embodiment provides a high-temperature fan bearing housing lubrication structure to ensure good lubrication of fan bearings in high-temperature environments, extend equipment service life, and reduce maintenance frequency.

[0050] This embodiment includes the following specific structure:

[0051] Box structure:

[0052] The lubrication structure consists of a pressure cap 1, a support box 2, and a base 3. The pressure cap 1 and support box 2 are both semi-cylindrical and are bolted together to form a complete cylindrical housing. Sealing gaskets are installed on the connecting surfaces of the pressure cap 1 and support box 2 to ensure a tight seal and prevent grease leakage. Bearing positions are located on both sides of the housing, each a semi-cylindrical through-hole formed by the end faces of the pressure cap 1 and support box 2. A bearing is installed in the center of each bearing position for connection with a rotating shaft passing through it. The volume of the bearing position is larger than the volume of the bearing itself to hold sufficient grease to ensure lubrication during bearing operation.

[0053] Sealing mechanism:

[0054] Each bearing seat has a sealing mechanism 4 installed on its inner and outer sides. The sealing mechanism 4 includes an end cap 41, an oil seal 42, and a sealing cover 43. The end cap 41 consists of an annular portion and a convex ring portion, wherein the outer diameter of the annular portion is larger than the diameter of the bearing seat, and it fits with the bearing seat of the support box 2 to reliably fix the sealing mechanism to the bearing seat, thereby forming a sealed chamber. The convex ring portion is located on the side of the annular portion away from the bearing seat, and is used for coaxial fixed connection with the oil seal 42 to further improve the sealing performance. The sealing cover 43 is located on the side of the oil seal 42 away from the end cap 41, and is fixed to the end cap 41 by several connecting bolts 44 arranged circumferentially along the central axis of the end cap to ensure the stability and coaxiality of the entire sealing mechanism.

[0055] Grease-filled chamber:

[0056] In this structure, the sealed cavity between the pressure cap 1 and the bearing position of the support box 2 is filled with an appropriate amount of grease to reduce bearing wear at high temperatures and ensure long-term stable operation of the fan. The grease can be replenished through the filling port 5 on the support box 2. The filling port 5 is a threaded through hole equipped with a sealing bolt to ensure no leakage occurs after filling. Furthermore, the end caps 41 of the two sealing mechanisms 4 inside the support box 2 are fixedly connected to each other by two mirror-symmetrically arranged connecting rods 21, further enhancing the stability of the sealing structure and preventing structural deformation under high-temperature conditions.

[0057] Use of sealing packing:

[0058] A sealing packing is installed at the connection between the end cover 41 and the rotating shaft to improve the sealing performance at this location and prevent gaps from forming due to thermal expansion under high-temperature conditions. In addition, the sealing packing is elastic and can absorb minor vibrations during equipment operation, reducing wear on the sealing mechanism and bearings.

[0059] The high-temperature fan bearing housing lubrication structure in this embodiment achieves excellent lubrication of the bearing at high temperatures through a reasonable sealing design and the setting of the grease chamber. The cooperation between the end cap 41, oil seal 42, sealing cover 43, and connecting rod 21 of the sealing mechanism ensures the stability and sealing performance of the sealing structure, thereby effectively extending the service life of the equipment. At the same time, the addition port 5 facilitates the periodic replenishment of grease, simplifies the maintenance process, and makes this structure suitable for fan bearing lubrication applications under high-temperature conditions.

[0060] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lubrication structure for a high-temperature fan bearing housing, comprising a pressure cap (1), a support box (2), a base (3), and a sealing mechanism (4), characterized in that: The pressure cap (1) and the support box (2) are detachably and fixedly connected to form a cylindrical box. Bearing positions are provided on both sides of the box, located at the central axis of the box. Bearings are fixedly connected in the two bearing positions respectively. The rotating shaft passes through the two bearings and is fitted and connected to the bearings. Sealing mechanisms (4) are provided on the inner and outer sides of each bearing position. The two sealing mechanisms (4) and the bearing positions of the box together form a chamber, which is filled with grease. The base is located below the support box. The pressure cap (1) and support box (2) are respectively semi-cylindrical. The bearing positions are located at both ends of the pressure cap (1) and support box (2). The bearing positions of the pressure cap (1) and support box (2) are semi-cylindrical through holes. Together, they form a cylindrical cavity. The two sealing mechanisms (4) are located on both sides of the cylindrical cavity and are arranged in a mirror symmetrical manner. The volume of the cylindrical cavity is greater than the volume of the bearing, and its cylindrical length is greater than the thickness of the bearing. The bearing is located at the center of the cylindrical cavity, and its circumference is fixedly connected to the cylindrical cavity through a sleeve. The sealing mechanism (4) includes: End cap (41), the end cap (41) includes a circular ring portion and a convex ring portion arranged coaxially. The outer diameter of the circular ring portion is larger than the diameter of the bearing position. The circular ring portion is used to form a chamber together with the two sealing mechanisms (4) and the bearing position of the housing. The convex ring portion is located on the side of the circular ring portion away from the bearing position. Oil seal (42), wherein the oil seal (42) is coaxially and fixedly connected to the protruding ring portion of the end cap (41); A sealing cap (43) is coaxially disposed on the side of the oil seal (42) away from the end cap (41) and is fixedly connected to each other by connecting bolts (44); a number of connecting bolts (44) are provided and arranged in a circular array along the central axis of the end cap (41).

2. The lubrication structure for a high-temperature fan bearing housing as described in claim 1, characterized in that: A filling port (5) is provided at one bearing position of the support box (2); the filling port (5) is a threaded through hole and is fitted with a sealing bolt.

3. The lubrication structure for a high-temperature fan bearing housing as described in claim 1, characterized in that: The two end caps (41) of the two sealing mechanisms (4) located inside the support box (2) are fixedly connected to each other by a connecting rod (21); there are two connecting rods (21) arranged in a mirror symmetrical manner.

4. The lubrication structure for a high-temperature fan bearing housing as described in claim 1, characterized in that: A sealing filler is provided at the connection between the end cap (41) and the rotating shaft.

5. The lubrication structure for a high-temperature fan bearing housing as described in claim 1, characterized in that: The pressure cap (1) and the support box (2) are fixedly connected by bolts, and a sealing gasket is provided on the connection surface of the two.

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