Device for mounting fan impeller shaft bearing

Abstract

The utility model discloses a device for installing a bearing of a fan impeller shaft. One end of the main screw is provided with triangular threads matched with fan impeller shaft axis threads, the other end of the main screw is provided with a nut, the center of the spacer bush is provided with internal threads matched with the triangular threads, the outer edge of the spacer bush is provided with countersunk external threads, the outer wall of the spacer bush is provided with a handle, one end of the bearing installation sleeve is internally contracted and provided with inner wall threads, and the other end of the bearing installation sleeve is provided with a sleeve-shaped opening matched with a bearing in size. When the device is used, the mounting sleeve is selected according to the specification of the bearing, the mounting sleeve, the spacer bush and the main screw are assembled, then the main screw is in butt joint with the axis of a fan impeller shaft, the main screw penetrates through a new bearing, the spacer bush handle is rotated to push the mounting sleeve to enable the bearing to be stably pressed into a mounting station, and finally the main screw is reversely rotated to retreat from the device. The device is convenient and accurate to install, good centering performance can be guaranteed, and installation errors are avoided; the applicability is high, and the mounting sleeve can be replaced to adapt to bearings of different specifications; the bearing structure is protected, the service life is prolonged, and the fan impeller shaft bearing installation problem is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary technology for the installation of fan bearings in tobacco drying machines, specifically a device for installing fan impeller shaft bearings. Background Technology

[0002] The HDT airflow drying machine on the cigarette factory's tobacco (stem) drying machine is a key piece of equipment in the tobacco (stem) drying process. It mainly uses hot airflow to implement a convection drying process for the tobacco (stem). Through full contact between the high-temperature hot air and the tobacco (stem), the moisture in the tobacco (stem) evaporates rapidly under the action of heat transfer, thereby achieving the purpose of drying. However, this drying machine operates continuously in a high-temperature environment for a long time. During the production process, its internal temperature is always maintained at a high level to meet the process requirements of drying tobacco (stem). But when there is no production task, the equipment will gradually cool down to room temperature. This frequent hot and cold alternation process puts great stress on the equipment's components. Long-term exposure to the stress changes of thermal expansion and contraction can easily cause changes in the microstructure of the equipment parts, resulting in a decrease in the strength of the parts.

[0003] As a crucial component of the HDT airflow drying machine, the impeller of the blower is characterized by its large size and heavy weight. This presents numerous challenges to the installation of the blower impeller shaft bearings. During installation, the impeller's large size and heavy weight make precise positioning and installation difficult. Improper methods such as direct, forceful hammering during installation can severely impact the fit between the shaft and bearing, resulting in poor alignment. Poor alignment causes uneven loads on the bearing during operation, significantly shortening its lifespan and potentially leading to bearing failure. This disrupts the normal operation of the entire drying machine, reduces production efficiency, and increases equipment maintenance costs.

[0004] On the other hand, the bearing size and specifications of the fan impeller will vary due to a variety of factors, and the fans in the silk making workshop will also have different usage scenarios. In the silk making workshop, different process links, different fan loads, different fan speeds, or installation space limitations will all affect the impeller size and specifications. Therefore, the size and specifications of the bearings used are also diverse. Summary of the Invention

[0005] To address the shortcomings and defects of the existing technology, the inventors, through research and development, have provided a device for installing wind turbine impeller shaft bearings. This solves the problems of difficult installation of wind turbine impeller shaft bearings and the lack of safe, convenient, and precise bearing installation tools in the aforementioned background technology. Specifically, this utility model is implemented as follows:

[0006] A device for installing a bearing on a wind turbine impeller shaft includes: a main screw, one end of which has a triangular thread adapted to the thread of the wind turbine impeller shaft, enabling it to connect to the shaft center and be on the same axis; the other end is a nut; a spacer, the center of which has an internal thread adapted to the triangular thread, allowing the spacer to be connected and installed with the main screw, and the spacer can be moved along the thread direction of the main screw by rotating the spacer; the outer edge of the spacer opening has a countersunk external thread for connecting and installing with a bearing mounting sleeve; several spacer handles are vertically arranged on the outer wall of the spacer; a bearing mounting sleeve, one end of which has an inwardly tapered opening and an internal thread on the inner wall, the internal thread connecting and combining with the external thread of the spacer; the other end is a sleeve-shaped opening, the size of which is adapted to the size of the bearing to be installed, the thickness of which does not exceed the thickness of the inner or outer ring of the bearing, and can be aligned with the inner or outer ring of the bearing to be installed.

[0007] Furthermore, the mounting end of the bearing mounting sleeve is provided with an annular inner groove, and the inner wall thread is provided on the inner wall of the annular inner groove. The sleeve opening is a double-layered sleeve opening, and the spacing of the double-layered sleeve opening is adapted to the inner and outer rings of the bearing to be installed, so that during installation, the surface of the inner sleeve opening corresponds to the inner ring of the bearing to be installed, and the surface of the outer sleeve opening corresponds to the outer ring of the bearing to be installed.

[0008] Furthermore, the bearing mounting sleeve is available in various sizes to correspond to bearings of different sizes. When the diameter of the bearing mounting sleeve is smaller than the diameter of the spacer, the front section of the bearing mounting sleeve extends forward, and the length of the front section is longer than the installation depth of the fan impeller shaft bearing.

[0009] Furthermore, the edge of the sleeve opening at one end of the bearing mounting sleeve is chamfered.

[0010] Furthermore, the length of the spacer or bearing mounting sleeve is longer than the installation depth of the fan impeller shaft bearing.

[0011] The working principle of this utility model is as follows: The main screw is used to mate with the shaft of the fan impeller where the bearing needs to be installed. Its size and specifications, as well as the specifications of the triangular thread, are compatible with the shaft thread. By operating the nut at the tail of the main screw, it can be mated with the shaft of the impeller. The spacer also has an internal thread compatible with the triangular thread and is fitted onto the main screw before use. The bearing mounting sleeve is then assembled and mated with the spacer. The bearing mounting sleeve is a replaceable component and can be selected for installation. The specifications of the bearing mounting sleeve are selected according to the size of the bearing to be installed. After selecting the appropriate bearing mounting sleeve and assembling it with the inner thread of the spacer through the outer thread, the bearing installation operation can be performed. The front end of the main screw passes through the bearing to be installed. After the main screw is connected to the shaft thread of the fan impeller, it ensures that the device is in place with the bearing. During installation, the spacer handle ensures good alignment. Then, manually operate the spacer handle to rotate the spacer along the triangular thread towards the bearing. The sleeve-shaped opening of the bearing mounting sleeve installed in front of the spacer contacts the bearing. The cross-section of the bearing mounting sleeve's opening matches the shape, size, and thickness of the bearing's inner or outer ring, ensuring good contact with its surface. As the spacer rotates, the bearing mounting sleeve pushes the bearing along the axis of the main screw towards the center of the fan impeller shaft. The bearing surface experiences uniform force, aligning with the installation direction, allowing the bearing to be smoothly and steadily pressed into the impeller shaft's installation position. The entire process is smooth, the installation angle is precise, and there is no damage to the bearing structure. After the bearing is in place, reverse the rotation of the main screw to push the entire assembly out of the shaft center position, completing the bearing installation. If another fan has a different bearing specification, simply replace it with the appropriate bearing mounting sleeve to install that bearing, thus adapting to different bearing specifications.

[0012] The beneficial technical effects of this utility model are as follows:

[0013] (1) Convenient and precise installation: The main screw is threadedly connected to the impeller shaft of the fan, ensuring that the device and the impeller shaft are on the same axis, guaranteeing good alignment during installation. The spacer moves along the thread direction of the main screw by rotation, driving the bearing mounting sleeve to smoothly push the bearing into the fan impeller shaft, making the bearing installation angle precise and the force uniform, avoiding poor alignment and bearing damage caused by improper installation, and reducing errors and uncertainties during installation.

[0014] (2) Strong applicability: The bearing mounting sleeve is available in various sizes and specifications, and can be selected and replaced according to different specifications of bearings. It can be adapted to the installation of impeller shaft bearings of different models of fans, which improves the versatility and practicality of the device and reduces the cost for enterprises to equip bearings of different specifications with various installation tools.

[0015] (3) Protect the bearing structure: The thickness and shape of the sleeve opening of the bearing mounting sleeve are adapted to the inner or outer ring of the bearing, and the edge of the sleeve opening is chamfered. During the installation process, it can make good contact with the surface of the inner or outer ring of the bearing, so that the overall surface of the bearing is evenly stressed, and the bearing structure will not be damaged. This extends the service life of the bearing, reduces equipment wear caused by installation, and indirectly reduces maintenance costs. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural view of a device for installing bearings on a wind turbine impeller shaft according to the present invention.

[0017] Figure 2 This is a front view of the structural configuration of a wind turbine impeller shaft bearing installation according to the present invention.

[0018] Figure 3 A three-dimensional cross-sectional view of a component structure of a spacer used for mounting bearings on a wind turbine impeller shaft;

[0019] Figure 4 A perspective view of a double-layer bearing mounting sleeve for mounting wind turbine impeller shaft bearings;

[0020] Figure 5 A schematic diagram of the structure of a double-layer bearing mounting sleeve during bearing installation;

[0021] Figure 6 A partial cross-sectional perspective view of a bearing mounting sleeve for mounting a wind turbine impeller shaft bearing;

[0022] Figure 7 This is a schematic diagram of the structure of a spacer used for mounting bearings on a wind turbine impeller shaft;

[0023] Figure 8 A three-dimensional cross-sectional view of the structural components of the bearing mounting sleeve used for the corresponding small bearing.

[0024] Figure 9 A schematic diagram of the structure for installing a bearing using a bearing mounting sleeve for a medium-sized bearing;

[0025] Figure 10 This is a schematic diagram of the structure for installing a bearing using a bearing mounting sleeve for a corresponding small bearing.

[0026] in:

[0027] 1—Main screw, 11—Triangular thread, 12—Nut

[0028] 2—Spacer, 21—Internal thread, 22—Spacer handle, 23—External thread

[0029] 3—Bearing mounting sleeve, 31—Inner wall thread, 32—Sleeve-shaped opening, 33—Annular inner groove, 34—Double-layer sleeve opening;

[0030] 4—Bearing, 41—Inner ring, 42—Outer ring. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0032] Example 1: In the yarn processing workshop, the impeller shaft bearing of an HDT airflow yarn dryer is worn and needs to be replaced. The installation work is accomplished using a device for installing the impeller shaft bearing.

[0033] The maintenance personnel first confirm the dimensions of the new bearing 4, and then select a matching bearing 4 mounting sleeve 3 according to the dimensions. This device's bearing 4 mounting sleeve 3 comes in various sizes to meet the installation requirements of bearings 4 of different specifications. After selecting the bearing 4 mounting sleeve 3 corresponding to the dimensions of the new bearing 4, the inner thread 31 of the bearing 4 mounting sleeve 3 is aligned with the countersunk external thread 23 of the spacer 2 and tightened, making it an integral part of the spacer 2 installation.

[0034] Subsequently, spacer 2 is fitted onto main screw 1, with the internal thread 21 at the center of spacer 2 matching the triangular thread 11 at one end of main screw 1. Several spacer handles 22 are vertically arranged on the outer wall of spacer 2. Operating the spacer handles 22 causes spacer 2 to rotate around the triangular thread 11 and retract to a suitable position, exposing the end of main screw 1; the front end of main screw 1 passes through the new bearing 4 to be installed, awaiting installation.

[0035] The triangular thread 11 at one end of the main screw 1 is compatible with the thread of the impeller shaft. The maintenance personnel operate the nut 12 at the tail of the main screw 1 to connect the main screw 1 with the shaft of the impeller shaft, ensuring that the two are on the same axis and ensuring good alignment during installation.

[0036] Then, manually rotate the spacer handle 22, causing the spacer 2 to rotate and move along the triangular thread 11 of the main screw 1 towards the bearing 4. The sleeve-shaped opening 32 of the bearing 4 mounting sleeve 3 installed in front of the spacer 2 contacts the bearing 4. Because the cross-section of the sleeve-shaped opening 32 is adapted to the shape, size, and thickness of the inner ring 41 or outer ring 42 of the bearing 4, and the edge of the sleeve opening is chamfered, the entire surface of the bearing 4 is subjected to uniform force during the pushing process, and the direction is directly opposite to the installation direction. As the spacer 2 continues to rotate and advance, the bearing 4 mounting sleeve 3 pushes the bearing 4 to move smoothly along the axis of the main screw 1 towards the inside of the fan impeller shaft until the bearing 4 reaches the accurate installation position.

[0037] After bearing 4 is installed in place, the maintenance personnel rotate the main screw 1 in reverse to remove the entire device from the center of the fan impeller shaft. At this point, the installation of bearing 4 is successfully completed.

[0038] The entire installation process was very smooth, with precise installation angles, effectively avoiding misalignment and damage to bearing 4 caused by improper installation. If other fans in the workshop need to be replaced with bearings 4 of different specifications later, maintenance personnel only need to replace the corresponding bearing 4 mounting sleeve 3 to continue using the device for installation work, which is both efficient and convenient.

[0039] Preferably, the bearing 4 mounting sleeve 3 has a double-layered sleeve opening 32 and a double-layered sleeve opening 34, meaning that the mounting end is provided with an annular inner groove 33. The spacing of the double-layered sleeve opening 34 is adapted to match the inner and outer rings 42 of the bearing 4 to be installed, so that during installation, the surface of the inner sleeve opening corresponds to the inner ring 41 of the bearing 4 to be installed, and the surface of the outer sleeve opening corresponds to the outer ring 42 of the bearing 4 to be installed. During installation, the double-layered sleeve opening 34 of the bearing 4 mounting sleeve 3 simultaneously contacts the surfaces of the inner ring 41 and the outer ring 42 of the bearing 4, making the bearing 4 more stable under force during the pushing and installation process. Furthermore, the design of the annular inner groove 33 prevents the sleeve opening surface from contacting the ball bearing area, reducing the probability of dust and other debris entering and adhering to the ball bearing surface or gaps, thereby protecting the bearing 4. However, it should be noted that omitting the annular inner groove 33 and using a thickened sleeve opening 32 to simultaneously contact the entire surface of the bearing 4 is also a feasible solution.

[0040] Preferably, the bearing 4 mounting sleeve 3 comes in various sizes to correspond to different sizes of bearings 4. When different sizes of bearings 4 need to be installed, it is convenient to select the correct size of the bearing 4 mounting sleeve 3 and then install it on the spacer 2. The edge of the sleeve opening 32 at one end of the bearing 4 mounting sleeve 3 is chamfered. It should be noted that the length of the spacer 2 is longer than the installation depth of the fan impeller shaft bearing 4 to ensure that the bearing 4 can be installed in place. It should also be noted that when the diameter of the bearing 4 mounting sleeve 3 is smaller than the diameter of the spacer 2, the front part of the bearing 4 mounting sleeve 3 extends forward, and the length of the front part is longer than the installation depth of the fan impeller shaft bearing 4 to ensure that the bearing 4 can be pushed into place.

[0041] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A device for installing bearings on a wind turbine impeller shaft, characterized in that... include: The main screw (1) has a triangular thread (11) at one end that is compatible with the thread of the impeller shaft of the fan, which can be connected to the impeller shaft and be on the same axis, and the other end is a nut (12). The spacer (2) has an internal thread (21) at its center, which is adapted to the triangular thread (11) so that the spacer (2) can be connected and installed with the main screw (1) and can be moved along the thread direction of the main screw (1) by rotating the spacer (2); the outer edge of the sleeve opening has a countersunk external thread (23) for connecting and installing with the bearing (4) mounting sleeve (3); several spacer handles (22) are vertically arranged on the outer wall of the spacer (2); The bearing (4) mounting sleeve (3) has an inwardly tapered opening at one end and an inner wall thread (31) on the inner wall. The inner wall thread (31) is connected and combined with the outer thread (23) of the spacer (2). The other end is a sleeve-shaped opening (32). The size of the bearing (4) mounting sleeve (3) is adapted to the size of the bearing (4) to be installed. The thickness of the sleeve-shaped opening (32) does not exceed the thickness of the inner ring (41) or the outer ring (42) of the bearing (4), and can be aligned with the inner ring (41) or the outer ring (42) of the bearing (4) to be installed.

2. The device for installing wind turbine impeller shaft bearings according to claim 1, characterized in that, The mounting end of the bearing (4) mounting sleeve (3) is provided with an annular inner groove (33), and the inner wall thread (31) is provided on the inner wall of the annular inner groove (33). The sleeve opening (32) is a double-layered double sleeve opening (34). The spacing of the double sleeve opening (34) is adapted to the inner and outer rings (42) of the bearing (4) to be installed, so that when installing, the surface of the inner sleeve opening corresponds to the inner ring (41) of the bearing (4) to be installed, and the surface of the outer sleeve opening corresponds to the outer ring (42) of the bearing (4) to be installed.

3. The device for installing wind turbine impeller shaft bearings according to claim 1, characterized in that, The bearing (4) mounting sleeve (3) is available in various sizes and specifications, corresponding to bearings (4) of various sizes and specifications. When the diameter of the bearing (4) mounting sleeve (3) is smaller than the diameter of the spacer (2), the front part of the bearing (4) mounting sleeve (3) extends forward, and the length of the front part is longer than the installation depth of the fan impeller shaft bearing (4).

4. The device for installing wind turbine impeller shaft bearings according to claim 1, characterized in that, The edge of the sleeve opening (32) at one end of the sleeve-shaped opening (32) of the bearing (4) mounting sleeve (3) is chamfered.

5. The device for installing a wind turbine impeller shaft bearing according to claim 1, characterized in that, The length of the spacer (2) or bearing (4) mounting sleeve (3) is longer than the installation depth of the fan impeller shaft bearing (4).

Images