Auxiliary measuring device for installation depth of generator bearing

Abstract

The utility model discloses a generator bearing installation depth auxiliary measuring device, which comprises a bottom plate of which a part of the bottom surface is attached to the end surface of a moving shaft, the end part is located at the inner side of a fixed shaft, the bottom surface is a flat plane, and the end surface, deviating from the bottom surface, of the bottom plate is provided with a chute; the magnetic attraction piece is embedded in the bottom plate and used for magnetically attracting the bottom plate to the end face of the moving shaft; the sliding rail is arranged in the sliding groove in a sliding mode and slides towards the inner side wall of the fixed shaft in the plane parallel to the end face of the movable shaft. The depth gauge is fixedly arranged on the sliding rail and comprises a measuring rod extending between the movable shaft and the fixed shaft, and the end portion of the measuring rod abuts against the end face of the bearing outer ring. According to the invention, a method of placing a cushion block for measurement is replaced, the working efficiency is greatly improved, and the measurement precision is improved.

Description

Technical Field

[0001] The present application relates to the technical field of depth measurement, and in particular to an auxiliary measurement device for the installation depth of a generator bearing. Background Art

[0002] In recent years, wind turbines have been increasingly developing towards high-power and large-size models, and semi-direct-drive wind turbines have gradually become the focus of industry development. The so-called semi-direct-drive wind turbines are composed of generators, main shaft systems, and gearboxes.

[0003] The semi-direct drive spindle system is divided into a moving shaft and a fixed shaft. During actual assembly, the fixed shaft is heated first and then inserted into the outer ring of the bearing. The height of the fixed shaft is higher than that of the moving shaft. After inserting into the outer ring of the bearing, the relative distance between the end face of the moving shaft and the bearing surface needs to be measured. Since the height of the fixed shaft is higher than that of the moving shaft, the measuring reference surface of the depth gauge cannot be directly placed on the end face of the moving shaft, and the installation depth of the bearing relative to the moving shaft cannot be measured.

[0004] The existing measurement method requires raising the height of the moving shaft and placing a pad on the end face of the moving shaft, that is, below the depth gauge, to ensure that the height after raising is greater than the fixed shaft height, thereby meeting the conditions for depth gauge measurement. This method is cumbersome to operate and has low measurement accuracy. The bearing installation accuracy has high requirements, and deviations will affect the normal service life of the generator.

[0005] Therefore, in view of the above technical problems, how to improve the measurement accuracy and increase the measurement efficiency is a technical problem that technical personnel in this field need to solve. Utility Model Content

[0006] The purpose of the present application is to provide a generator bearing installation depth auxiliary measurement device, which replaces the existing pad height measurement method, greatly improves the measurement accuracy and improves work efficiency.

[0007] To achieve the above objectives, the present application provides a generator bearing installation depth auxiliary measurement device, comprising:

[0008] A bottom plate, part of the bottom surface of which is in contact with the end surface of the moving shaft, and the end portion of which is located inside the fixed shaft, the bottom surface being a flat plane, and a slide groove being arranged on the end surface of the bottom plate away from the bottom surface;

[0009] A magnetic attraction member, embedded in the bottom plate, used for magnetically attracting the bottom plate to the end surface of the moving shaft;

[0010] A slide rail, slidably disposed in the slide groove, and sliding in a plane parallel to the end surface of the movable shaft toward the inner side wall of the fixed shaft;

[0011] The depth gauge is fixedly arranged on the slide rail and comprises a measuring rod extending between the moving shaft and the fixed shaft, and the end of the measuring rod abuts against the end surface of the outer ring of the bearing.

[0012] Preferably, the magnetic attraction member is an electromagnet, and the electromagnet is powered on and off by a switch to control whether the bottom plate is adsorbed on the moving shaft.

[0013] Preferably, the number of the slide grooves is two and they are arranged in parallel, and the two slide rails are slidably arranged in the two slide grooves.

[0014] Preferably, the depth gauge further comprises a positioning plate fixed on the two slide rails, and the plane where the positioning plate is located is parallel to the end face of the moving shaft.

[0015] Preferably, the measuring rod is vertically arranged on the positioning plate, passes through the bottom plate and extends between the moving shaft and the fixed shaft.

[0016] Preferably, an inner groove for providing a moving space for the measuring rod is provided on the bottom plate, so that the measuring rod can slide within the length range of the sliding groove.

[0017] Preferably, the measuring rod is slidably arranged along its length direction to adapt to measurements at different depths.

[0018] Preferably, the measuring rod uses the end surface of the moving shaft as a reference surface.

[0019] Compared with the above background technology, the present application fits the bottom surface of the bottom plate with the end surface of the moving shaft, and stably adsorbs it on the end surface of the moving shaft through a magnetic suction piece. At the same time, the bottom plate is located inside the fixed shaft, and the height of the fixed shaft does not affect the setting of the bottom plate. Thus, the end surface of the moving shaft is used as the reference surface, and the slide rail on the bottom plate and the depth gauge are used to complete the measurement of the installation depth of the outer ring of the bearing at different positions. This device replaces the method of placing a pad for measurement, greatly improving work efficiency and measurement accuracy.

[0020] Specifically, the device includes a bottom plate, a magnetic suction piece, a slide rail and a depth gauge. Part of the bottom surface of the bottom plate is attached to the end surface of the moving shaft, and its end is located inside the fixed shaft, that is, the bottom plate is located inside the fixed shaft, thereby avoiding the influence of the fixed shaft height on the depth gauge. The bottom surface is a flat plane, so that the end surface of the moving shaft can be used as a reference plane for measurement; and a slide groove is provided on the end surface of the bottom plate away from the bottom surface, and the slide rail is slidably arranged in the slide groove, and slides toward the inner wall of the fixed shaft in a plane parallel to the end surface of the moving shaft, thereby driving the depth gauge on the slide rail to move. The depth gauge includes a measuring rod with one end extending between the moving shaft and the fixed shaft, and the end of the measuring rod is against the end surface of the outer ring of the bearing, thereby measuring the relative height of the moving shaft and the outer ring of the bearing. The bottom plate is adsorbed on the end surface of the moving shaft by a magnetic suction piece, which is convenient and fast to use and has high stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0022] Figure 1 An installation position diagram of a generator bearing installation depth auxiliary measurement device provided in an embodiment of the present application;

[0023] Figure 2 A schematic diagram of the three-dimensional structure of a generator bearing installation depth auxiliary measurement device provided in an embodiment of the present application;

[0024] Figure 3 This is a schematic diagram of the installation position of the magnetic attraction component provided in an embodiment of the present application.

[0025] In the figure: 1, fixed shaft 2, bearing outer ring 3, bottom plate 4, moving shaft 5, slide groove 6, slide rail 7, positioning plate 8, measuring rod 9, inner groove 10, magnetic suction part. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] It should be noted that in this embodiment, the directions or positional relationships indicated by "upper", "lower", "front", "back", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] like Figure 1 As shown, in this embodiment, a generator bearing installation depth auxiliary measurement device is provided. The device is installed on the end surface of the moving shaft 4 and is located on the inner side of the fixed shaft 1 as a whole, thereby avoiding the problem of being unable to measure the depth due to the fixed shaft 1 being too high.

[0030] For details, please refer to Figure 2 The device includes a bottom plate 3, a magnetic attraction member 10, a slide rail 6 and a depth gauge. Part of the bottom surface of the bottom plate 3 fits with the end surface of the moving shaft 4 to ensure that the two have the same reference surface, and the depth measurement is performed based on this reference surface. Of course, the bottom surface needs to be a flat plane, that is, the plane where the bottom surface is located fits with the end surface of the moving shaft 4, thereby improving the measurement accuracy of the depth gauge.

[0031] A slide groove 5 is provided on the end surface of the bottom plate 3 away from the bottom surface, and a slide rail 6 is slidably provided in the slide groove 5, and slides toward the inner wall of the fixed axis 1 in a plane parallel to the end surface of the movable axis 4. It should be noted that the slide groove 5 is usually a linear groove, and the slide rail 6 ensures that there is no hysteresis during the sliding process, thereby improving the sliding effect of the slide rail 6. At the same time, the matching accuracy of the slide groove 5 and the slide rail 6 is high, which prevents measurement errors caused by the matching accuracy of the two.

[0032] It should be noted that, since the fixed shaft 1 is fixed on the bearing outer ring 2 , in order to meet the measurement conditions, the slide rail 6 needs to slide toward the inner wall of the fixed shaft 1 , thereby driving the depth gauge to reach the bearing outer ring 2 .

[0033] The magnetic element 10 is embedded in the bottom plate 3. Figure 3 , the bottom plate 3 can be magnetically attracted to the end surface of the moving shaft 4, and the disassembly and assembly are convenient and quick, and the stability is high.

[0034] On the basis of the above embodiment, the depth gauge is fixed on the slide rail 6 and can slide with the slide rail 6. The depth gauge includes a measuring rod 8 extending between the movable shaft 4 and the fixed shaft 1, and after the measuring rod 8 slides to a certain position, its end can abut against the end face of the bearing outer ring 2. By recording the scale of the measuring rod 8 on the end face or bottom face of the movable shaft 4 at this time, the installation height of the bearing relative to the movable shaft 4 can be directly measured.

[0035] In summary of the above embodiments, the present application fits the bottom surface of the bottom plate 3 with the end surface of the moving shaft 4, and stably adsorbs the bottom plate 3 on the end surface of the moving shaft 4 through the magnetic suction member 110. At the same time, the bottom plate 3 is located inside the fixed shaft 1, and the height of the fixed shaft 1 does not affect the setting of the bottom plate 3. Thus, the end surface of the moving shaft 4 is used as the reference surface, and the slide rail 6 on the bottom plate 3 and the depth gauge are used to complete the measurement of the installation depth of the outer ring 2 of the bearing at different positions. This device replaces the method of placing a pad for measurement, greatly improving the work efficiency and measurement accuracy.

[0036] The magnetic attraction member 10 is an electromagnet or a magnet, which can directly adsorb the bottom plate 3 onto the end surface of the moving shaft 4. The present application takes the electromagnet as an example for introduction. The electromagnet can be powered on and off by a switch to control whether the bottom plate 3 is adsorbed onto the moving shaft 4. As for the specific structure and working principle of the switch and the electromagnet, the present application will not repeat them, and the specifics can be referred to the prior art.

[0037] In order to improve the sliding stability of the slide rail 6 and reduce the sliding error, the present application sets the number of the slide grooves 5 to two, and sets them in parallel, and the two slide rails 6 are slidably set in the two slide grooves 5 respectively.

[0038] At the same time, the depth gauge also includes a positioning plate 7 fixed on the two slide rails 6, please refer to Figure 2 The plane where the positioning plate 7 is located also needs to be parallel to the end face of the moving shaft 4, thereby ensuring that the measuring surface of the depth gauge can be parallel to the end face of the moving shaft 4, thereby ensuring the measuring accuracy of the depth gauge.

[0039] In addition, the measuring rod 8 is vertically arranged on the positioning plate 7, and the measuring rod 8 can slide along its length direction, so as to meet the measurement of different installation depths of the bearing outer ring 2. The measuring rod 8 passes through the bottom plate 3 and extends between the moving shaft 4 and the fixed shaft 1, and an inner groove 9 is provided on the top plate to provide a moving space for the measuring rod 8, so that the measuring rod 8 can slide within the length range of the slide groove 5.

[0040] It should be noted that, since the depth gauge is slidably arranged via the slide rail 6 , it can also be adapted to measure bearing outer rings 2 of different diameters, and has a wider scope of application.

[0041] The above-mentioned depth gauge can also be replaced by other measuring tools. For example, the depth gauge can be replaced by a dial indicator, which can be used to measure the end face runout of the bearing outer ring 2. The flatness requirement can also be achieved by moving the slide rail 6. These will not be described in detail here, and all fall within the scope of protection of this application.

[0042] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0043] Specific examples are used herein to illustrate the principles and implementation methods of the present application, and the description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A generator bearing installation depth auxiliary measurement device, characterized in that: include: A bottom plate, part of the bottom surface of which is in contact with the end surface of the moving shaft, and the end portion of which is located inside the fixed shaft, the bottom surface being a flat plane, and a slide groove being arranged on the end surface of the bottom plate away from the bottom surface; A magnetic attraction member, embedded in the bottom plate, used for magnetically attracting the bottom plate to the end surface of the moving shaft; A slide rail, slidably disposed in the slide groove, and sliding in a plane parallel to the end surface of the movable shaft toward the inner side wall of the fixed shaft; The depth gauge is fixedly arranged on the slide rail and comprises a measuring rod extending between the moving shaft and the fixed shaft, and the end of the measuring rod abuts against the end surface of the outer ring of the bearing.

2. The auxiliary measuring device for generator bearing installation depth according to claim 1, characterized in that: The magnetic attraction member is an electromagnet, and the electromagnet is powered on and off by a switch member to control whether the bottom plate is adsorbed on the moving shaft.

3. The auxiliary measuring device for generator bearing installation depth according to claim 1, characterized in that: The number of the slide grooves is two and they are arranged in parallel, and the two slide rails are slidably arranged in the two slide grooves.

4. The auxiliary measuring device for generator bearing installation depth according to claim 3, characterized in that: The depth gauge further comprises a positioning plate fixed on the two slide rails, and the plane where the positioning plate is located is parallel to the end surface of the moving shaft.

5. The auxiliary measuring device for generator bearing installation depth according to claim 4, characterized in that: The measuring rod is vertically arranged on the positioning plate, and penetrates through the bottom plate and extends between the moving shaft and the fixed shaft.

6. The auxiliary measuring device for generator bearing installation depth according to claim 5, characterized in that: The bottom plate is provided with an inner groove for providing a moving space for the measuring rod, so that the measuring rod can slide within the length range of the sliding groove.

7. The auxiliary measuring device for generator bearing installation depth according to claim 5, characterized in that: The measuring rod is slidably arranged along its length direction to adapt to the measurement of different depths.

8. The auxiliary measuring device for generator bearing installation depth according to any one of claims 1 to 7, characterized in that: The measuring rod takes the end surface of the moving shaft as a reference surface.

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