Laser ranging tool, laser ranging assembly and wind generating set

Abstract

The utility model discloses a laser ranging tool, a laser ranging assembly and a wind generating set, and relates to the technical field of laser ranging, the laser ranging tool is provided with a ranging and polishing groove, the side wall of the ranging and polishing groove converges towards the groove bottom to form a reference ranging point, and the reference ranging point is provided with a laser ranging module. According to the technical scheme provided by the utility model, the laser distance measuring tool is arranged on one of the fan main shaft and the hub, the laser distance measuring device is arranged on the other one of the fan main shaft and the hub and is opposite to the laser distance measuring tool along the axial direction, and the laser distance measuring device is arranged on the other one of the fan main shaft and the hub. Laser emitted by the laser distance measuring device irradiates a reference distance measuring point in the distance measuring lighting groove, so that real-time monitoring of circumferential sliding and axial opening of the junction surface of the fan main shaft and the hub can be realized, and the problem of hysteresis of regular inspection by personnel is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of laser ranging, in particular to a laser ranging tooling, a laser ranging component and a wind turbine generator set. Background Art

[0002] In recent years, when a wind turbine unit bears a large load, the phenomena of circumferential slip and axial opening at the joint surface of the main shaft and the hub of the fan often occur, which easily leads to the flange bolts bearing shear force and alternating stress, increasing the probability of flange bolt fracture and further increasing the risk of hub dropping.

[0003] At present, in the industry, the detection of the slip of the joint surface between the main shaft and the hub and the monitoring of the opening are mainly carried out by means of regular inspection by personnel. However, this method not only increases the workload of on-site operators, but also has a certain lag. Summary of the Utility Model

[0004] The main object of the utility model is to provide a laser ranging tooling, a laser ranging component and a wind turbine generator set, aiming to solve the problem of lag in the circumferential slip and axial opening monitoring of the joint surface between the main shaft and the hub of the fan by the existing method of regular inspection by personnel.

[0005] To achieve the above object, the laser ranging tooling provided by the utility model is formed with a ranging and light-emitting groove, and the side walls of the ranging and light-emitting groove converge towards the groove bottom to form a reference ranging point for the laser ranging device to emit light and irradiate.

[0006] The technical solution provided by the utility model is to arrange the laser ranging tooling on one of the main shaft of the fan or the hub of the fan, and arrange a laser ranging device on the other one, and make them axially opposite to each other. The laser emitted by the laser ranging device irradiates the reference ranging point in the ranging and light-emitting groove. If the hub of the fan has an axial opening movement, the distance between the reference ranging point and the laser ranging device changes and can be directly monitored. If the hub of the fan has a circumferential slip movement, the reference ranging point deviates from the laser ranging device, and instead, the side wall of the ranging and light-emitting groove is axially aligned with the laser ranging device, and the measured distance by the laser ranging device changes and can also be directly monitored. Thus, the real-time monitoring of the circumferential slip and axial opening of the joint surface between the main shaft and the hub of the fan can be realized, overcoming the problem of lag in regular inspection by personnel.

[0007] In one embodiment, the ranging and light-emitting groove includes two opposite ranging and light-emitting side walls, and a boundary line is formed at the intersection of the bottoms of the two ranging and light-emitting side walls;

[0008] The reference ranging point is formed on the boundary line.

[0009] According to the above technical solution, compared with other closed - type ranging and lighting grooves, the ranging and lighting groove in this embodiment is defined by two ranging and lighting side walls. When machining the ranging and lighting groove, it can be formed by simple milling, and the machining difficulty is relatively low.

[0010] In one embodiment, the two ranging and lighting side walls are arranged in a planar extension.

[0011] According to the above technical solution, on the one hand, the machining difficulty of the ranging and lighting side walls arranged in a plane is lower than that of other types of lighting side walls. On the other hand, the algorithm for calculating the actual distance after the laser ranging device shines on the ranging and lighting side walls is also relatively simple.

[0012] In one embodiment, the side wall surface of the ranging and lighting groove is set as a frosted surface.

[0013] According to the above technical solution, the frosted surface is still a continuously extended surface macroscopically, but microscopically, there are fine particles on the frosted surface. The fine particles will enhance the reflection effect of the laser. That is, even if the laser emitted by the laser ranging device acts on the ranging and lighting side walls arranged obliquely, due to the existence of the fine particles, the scattered or reflected laser is more likely to be received by the receiving part of the laser ranging device.

[0014] The present utility model also proposes a laser ranging assembly, including the laser ranging tooling as described in any one of the above and a laser ranging device. The laser ranging device is arranged facing the ranging and lighting groove of the laser ranging tooling to shine light on the reference ranging point in the ranging and lighting groove.

[0015] The present utility model also proposes a wind turbine generator, including:

[0016] A main shaft of the wind turbine;

[0017] A wind turbine hub arranged on the main shaft of the wind turbine; and,

[0018] The laser ranging assembly as described in the above embodiment, one of the laser ranging tooling and the laser ranging device in the laser ranging assembly is arranged on the main shaft of the wind turbine, and the other is arranged on the wind turbine hub.

[0019] The technical solution provided by the present utility model arranges the laser ranging tooling on one of the main shaft of the wind turbine or the wind turbine hub, and arranges the laser ranging device on the other one, which can realize real - time monitoring of the circumferential slip and axial opening of the joint surface between the main shaft and the hub of the wind turbine, overcoming the problem of lag in regular inspection by personnel.

[0020] In one embodiment, the laser ranging tooling is arranged on the end face of the main shaft of the wind turbine;

[0021] The laser ranging device is arranged on the circumferential side wall of the fan hub.

[0022] According to the above technical solution, the end face provided by the main shaft of the fan is generally arranged axially. Installing the laser ranging tooling on the end face of the main shaft of the fan can obtain a good axial orientation, thereby reducing the repeated debugging of the laser ranging device.

[0023] In one embodiment, a transfer bracket is further arranged between the laser ranging device and the fan hub.

[0024] According to the above technical solution, the laser ranging device usually has an installation structure. By detachably installing the installation structure to the transfer bracket and then welding the transfer bracket or connecting it to the fan hub by other means, the transfer installation of the laser ranging device can be realized, and the laser ranging device can be detachably replaced.

[0025] In one embodiment, the transfer bracket is adhesively bonded to the fan hub.

[0026] According to the above technical solution, the adhesive bonding method can not only provide a stable connection foundation, but also allow the operator to disconnect the connection relatively easily when replacing the transfer bracket.

[0027] In one embodiment, the transfer bracket has an installation part, and the installation part extends radially along the fan hub;

[0028] The laser ranging device is arranged on the installation part.

[0029] According to the above technical solution, by arranging the installation part to extend radially, an installation foundation for the laser ranging device to face axially can be provided, so that laser ranging devices of more specifications can be adapted. Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0031] Figure 1 It is a schematic structural diagram of an embodiment of the laser ranging component provided by the present invention;

[0032] Figure 2 It is a schematic structural diagram of another embodiment (circumferential slip of the fan hub) of the laser ranging component provided by the present invention.

[0033] Explanation of the reference numerals in the drawings:

[0034] 100, Laser distance measurement component; 1, Laser distance measurement tooling; 11, Distance measurement light-emitting groove; 111, Distance measurement light-emitting side wall; 112, Reference distance measurement point; 2, Laser distance measurement device;

[0035] 200, Fan main shaft; 300, Fan hub; 400, Adapter bracket; 410, Installation part.

[0036] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0038] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0039] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0040] In recent years, when wind turbines are under large loads, the phenomena of circumferential slip and axial opening at the joint surface between the main shaft and the hub of the wind turbine often occur (circumferential slip means that the hub deflects and misaligns relative to the main shaft of the wind turbine in the circumferential direction, while axial opening means that the hub disengages from the main shaft of the wind turbine in the axial direction). This easily causes the flange bolts to bear shear force and alternating stress, which increases the probability of flange bolt fracture and further increases the risk of hub dropping.

[0041] Currently, in the industry, the detection of slip and monitoring of opening at the joint surface between the main shaft and the hub are mainly carried out through regular inspections by personnel. However, this method not only increases the workload of on-site operators but also has a certain lag.

[0042] Analyzing the above reasons, it can be seen that there is a lack of methods or equipment in the existing technology that can simultaneously monitor the circumferential slip and axial opening at the joint surface between the main shaft and the hub of the wind turbine in real time. In view of this, the present utility model proposes a laser ranging tooling, a laser ranging assembly, and a wind power generating set, aiming to solve the problem of lag in monitoring the circumferential slip and axial opening at the joint surface between the main shaft and the hub of the wind turbine by the existing method of regular inspections by personnel. Among them, Figure 1 is a schematic structural diagram of an embodiment of the laser ranging assembly provided by the present utility model; Figure 2 is a schematic structural diagram of another embodiment (circumferential slip of the wind turbine hub) of the laser ranging assembly provided by the present utility model.

[0043] Please refer to Figure 1 and Figure 2 , in an embodiment of the present utility model, the laser ranging tooling 1 is formed with a ranging and light-emitting groove 11, and the side walls of the ranging and light-emitting groove 11 converge towards the groove bottom to form a reference ranging point 112, and the reference ranging point 112 is used for the laser ranging device 2 to emit light and irradiate.

[0044] Based on the principle of laser ranging, when the emitted laser from the emitting part of the laser ranging device 2 acts on the laser acting surface of the laser ranging tooling 1, there will be reflected laser received by the receiving part of the laser ranging device 2. By obtaining the time from laser emission to reception, the distance between the laser ranging device 2 and the laser ranging tooling 1 can be determined. Whether the laser acting surface of the laser ranging tooling 1 is an inclined surface or a flat surface, measurement can be carried out;

[0045] It should be noted that in the initial state, the laser ranging tooling 1 is installed on the component to be measured. The laser ranging device 2 is used to align axially with the reference ranging point 112 for light projection, and the reference distance can be measured. Whether the laser ranging tooling 1 moves axially or radially along with the component to be measured, the distance measured by the laser ranging device 2 will change. (Among them, when moving axially, the distance between the laser ranging device 2 and the reference ranging point 112 changes directly. When moving radially, the laser emitted by the laser ranging device 2 hits the side wall of the ranging light projection groove 11, so that the distance measured by the laser ranging device 2 also changes);

[0046] Among them, the component to be measured includes but is not limited to the fan main shaft or the fan hub. It can be understood that when the laser ranging tooling 1 and the laser ranging device 2 are applied to the circumferential slip and axial opening monitoring of the fan main shaft and the fan hub, the problem of hysteresis in the circumferential slip and axial opening monitoring of the joint surface of the fan main shaft and the hub by the existing method of regular inspection by personnel can be solved. However, it is not limited to this. The laser ranging tooling 1 proposed in this application can be applied to any scenario that requires the detection of two displacements, namely radial and axial. This embodiment does not limit it;

[0047] Among them, "the side walls of the ranging light projection groove 11 converge towards the groove bottom to form the reference ranging point 112" includes that multiple side walls of the ranging light projection groove 11 converge towards the groove bottom, so that the reference ranging point 112 is directly formed at the convergence point. For example, the ranging light projection groove 11 can include a conical groove or a pyramidal groove. It can be understood that with the ranging light projection groove 11 arranged in this way, the laser ranging tooling 1 can be used to detect axial displacement and radial displacement in any direction. Of course, it also includes that two opposite side walls of the ranging light projection groove 11 intersect to form an intersection line, and any point on the intersection line belongs to the reference ranging point 112;

[0048] The application embodiment does not limit the size of the reference ranging point 112. If a slight radial offset of the component to be measured is allowed, the reference ranging point 112 can be set larger, so that when the component to be measured offsets within the allowed radial range, the laser emitted by the laser ranging device 2 can still hit the reference ranging point 112. That is to say, the size of the laser ranging point is related to the allowed radial displacement of the component to be measured.

[0049] For the technical solution provided by the present utility model, the laser ranging tooling 1 is arranged on one of the fan main shaft or the fan hub, and the laser ranging device 2 is arranged on the other one, and is axially opposite to the laser ranging tooling 1. The laser emitted by the laser ranging device 2 irradiates the reference ranging point 112 in the ranging light-irradiating groove 11. If the fan hub has an axial opening movement, the distance between the reference ranging point 112 and the laser ranging device 2 changes and can be directly monitored. If the fan hub has a circumferential sliding movement, the reference ranging point 112 deviates from the laser ranging device 2, and the side wall of the ranging light-irradiating groove 11 is axially aligned with the laser ranging device 2. The measured distance by the laser ranging device 2 changes and can also be directly monitored. Therefore, it is possible to realize the real-time monitoring of the circumferential sliding and axial opening of the joint surface between the fan main shaft and the hub, overcoming the problem of lag in regular inspection by personnel.

[0050] Specifically, in one embodiment, the ranging light-irradiating groove 11 includes two opposite ranging light-irradiating side walls 111. The bottoms of the two ranging light-irradiating side walls 111 intersect to form a boundary line, and the reference ranging point 112 is formed on the boundary line.

[0051] It should be noted that in this embodiment, due to the existence of the boundary line in the ranging light-irradiating groove 11, it means that the laser ranging tooling 1 has a certain setting direction. That is, the relative direction of the two ranging light-irradiating side walls 111 needs to be consistent with one of the movement monitoring directions of the component to be measured, so as to ensure that when the component to be measured drives the laser ranging tooling 1 to deviate along the movement monitoring direction, the laser light spot of the laser ranging device 2 can act on the ranging light-irradiating side wall 111, thereby monitoring its position deviation.

[0052] According to the above technical solution, compared with other closed-type ranging light-irradiating grooves 11, the ranging light-irradiating groove 11 in this embodiment is defined by two ranging light-irradiating side walls 111. When machining the ranging light-irradiating groove 11, it can be formed by simple milling, and the machining difficulty is relatively low.

[0053] In the above embodiment, the surface shapes of the two ranging light-irradiating side walls 111 can be concave arc surfaces or convex arc surfaces. Different surface shapes mean that when the laser ranging tooling 1 has an equal displacement along the radial direction, the change amount of the distance measured by the laser ranging device 2 is different. In this embodiment, the two ranging light-irradiating side walls 111 are arranged in a planar extension. Such a setting, on the one hand, the machining difficulty of the ranging light-irradiating side wall 111 arranged in a plane is lower than that of other types of light-irradiating side walls, and on the other hand, the algorithm for calculating the actual distance after the laser ranging device 2 irradiates the ranging light-irradiating side wall 111 is also relatively simple.

[0054] In one embodiment, the side wall surface of the ranging and lighting groove 11 is set as a frosted surface. It should be noted that the frosted surface is still a continuously extended surface macroscopically, but microscopically, there are fine particles on the frosted surface, and the fine particles will enhance the reflection effect of the laser. That is, even if the laser emitted by the laser ranging device 2 acts on the inclined ranging and lighting side wall 111, due to the existence of the fine particles, the scattered or reflected laser is more likely to be received by the receiving part of the laser ranging device 2.

[0055] The present utility model further provides a laser ranging assembly 100, which includes the laser ranging tooling 1 and the laser ranging device 2 as described in any one of the above. The laser ranging device 2 is arranged facing the ranging and lighting groove 11 of the laser ranging tooling 1 to irradiate the reference ranging point 112 in the ranging and lighting groove 11. The specific structure of the laser ranging tooling 1 refers to the above-mentioned embodiment. Since the laser ranging assembly 100 adopts all the technical solutions of the above-mentioned all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated herein one by one. Among them, the laser ranging device 2 is arranged facing the ranging and lighting groove 11 of the laser ranging tooling 1, and its orientation belongs to the axial direction of the laser ranging tooling 1, that is, the axial direction of the component to be measured.

[0056] The present utility model further provides a wind turbine generator, which includes a wind turbine main shaft, a wind turbine hub and the laser ranging assembly 100 of the above-mentioned embodiment. The wind turbine hub is arranged on the wind turbine main shaft. One of the laser ranging tooling 1 and the laser ranging device 2 in the laser ranging assembly 100 is arranged on the wind turbine main shaft, and the other is arranged on the wind turbine hub. Since the wind turbine generator adopts all the technical solutions of the above-mentioned all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated herein one by one. Among them, the laser ranging device 2 is arranged facing the ranging and lighting groove 11 of the laser ranging tooling 1, and its orientation belongs to the axial direction of the laser ranging tooling 1, that is, the axial direction of the wind turbine main shaft and the wind turbine hub.

[0057] According to the technical solution provided by the present utility model, the laser ranging tooling 1 is arranged on one of the wind turbine main shaft and the wind turbine hub, the laser ranging device 2 is arranged on the other, and the laser ranging device 2 is connected to the system of the wind turbine generator, so as to realize the real-time monitoring of the circumferential slip and axial opening of the joint surface between the wind turbine main shaft and the hub, and overcome the problem of hysteresis in the regular inspection by personnel.

[0058] In the above technical solution, the laser ranging tooling 1 can be set on the main shaft of the fan or on the hub of the fan. Conversely, the laser ranging device 2 can be set on the hub of the fan or on the main shaft of the fan. Specifically, in one embodiment, the laser ranging tooling 1 is set on the end face of the main shaft of the fan; the laser ranging device 2 is set on the circumferential side wall of the hub of the fan.

[0059] It should be noted that the laser ranging device 2 can be directly fixedly installed on the wind turbine hub, or can be installed on the wind turbine hub through a detachable solution. This embodiment does not limit this.

[0060] According to the above technical solution, the end face provided by the main shaft of the fan is generally arranged axially. Installing the laser ranging tooling 1 on the end face of the main shaft of the fan can obtain a better axial orientation, thereby reducing the repeated alignment and debugging for the laser ranging device 2.

[0061] Furthermore, in one embodiment, a transfer bracket is also arranged between the laser ranging device 2 and the hub of the fan. The laser ranging device 2 usually has an installation structure. By detachably installing the installation structure on the transfer bracket and then welding the transfer bracket or connecting it to the hub of the fan by other means, the transfer installation of the laser ranging device 2 can be realized, and the laser ranging device 2 can be detachably replaced.

[0062] Furthermore, in one embodiment, the transfer bracket is adhesively bonded to the hub of the fan. The adhesive bonding method can not only provide a stable connection foundation, but also allow the operator to easily disconnect the connection when replacing the transfer bracket.

[0063] Specifically, AB glue can be used to connect the transfer bracket and the hub of the fan.

[0064] In one embodiment, the transfer bracket has an installation part, and the installation part extends radially along the hub of the fan; the laser ranging device 2 is arranged on the installation part.

[0065] It should be noted that this installation part is used to connect with the installation structure of the laser ranging device 2, and its specific structural form can be determined according to the installation structure of the laser ranging device 2. For example, when the installation structure includes threaded holes, the installation part can include connecting bolts. At the same time, the installation structure of the laser ranging device 2 is usually at the bottom, that is, axially opposite to the emitting part. This embodiment does not limit the specific structural form of the installation part. According to the above technical solution, through the radially extending arrangement of the installation part, an installation foundation for the laser ranging device 2 facing axially can be provided, so as to be compatible with more specifications of the laser ranging device 2.

[0066] In another embodiment, the laser distance measurement tooling 1 is arranged close to the edge of the fan main shaft. It can be immediately seen that during the sliding at the same axial angle, the linear displacement of the point close to the axis on the fan main shaft is smaller, while the linear displacement of the point far from the axis is larger, thereby improving the test accuracy of the laser distance measurement device 2.

[0067] The above description is only an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A laser ranging tooling, characterized in that, The laser ranging tooling is formed with a ranging and light-emitting groove (11). The side walls of the ranging and light-emitting groove (11) converge towards the groove bottom to form a reference ranging point (112), and the reference ranging point (112) is used for the laser ranging device (2) to emit light and irradiate.

2. The laser distance measurement tooling according to claim 1, characterized in that The ranging and light-emitting groove (11) includes two opposite ranging and light-emitting side walls (111), and the bottoms of the two ranging and light-emitting side walls (111) intersect to form an intersection line; The reference ranging point (112) is formed on the intersection line.

3. The laser distance measurement tooling according to claim 2, characterized in that The two ranging and light-emitting side walls (111) are arranged in a planar extension.

4. The laser distance measurement tooling according to claim 1, characterized in that, The side wall surface of the ranging and light-emitting groove (11) is set as a frosted surface.

5. A laser ranging component, characterized in that, It includes the laser ranging tooling as described in any one of claims 1 to 4 and the laser ranging device (2). The laser ranging device (2) is arranged towards the ranging and light-emitting groove (11) of the laser ranging tooling to emit light and irradiate the reference ranging point (112) in the ranging and light-emitting groove (11).

6. A wind power generating set, characterized in that, It includes: The main shaft of the fan (200); The fan hub (300), which is arranged on the main shaft of the fan (200); and, The laser ranging component as described in claim 5, wherein one of the laser ranging tooling and the laser ranging device (2) in the laser ranging component is arranged on the main shaft of the fan (200), and the other is arranged on the fan hub (300).

7. The wind turbine according to claim 6, characterized in that The laser ranging tooling is arranged on the end face of the main shaft of the fan (200); The laser ranging device (2) is arranged on the circumferential side wall of the fan hub (300).

8. The wind power generating set according to claim 7, characterized in that, A transfer bracket (400) is further arranged between the laser ranging device (2) and the fan hub (300).

9. The wind power generating set according to claim 8, wherein, The transfer bracket (400) is adhesively bonded to the fan hub (300).

10. The wind power generating set according to claim 8, characterized in that, The transfer bracket (400) has a mounting portion (410), and the mounting portion (410) extends along the radial direction of the fan hub (300); The laser ranging device (2) is arranged on the mounting portion (410).

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