Rotating speed triggering device of wind driven generator

Abstract

The utility model discloses a rotating speed triggering device of a wind driven generator. The rotating speed triggering device comprises a connecting nut pipe, a triggering nail and a threaded hole, wherein the connecting nut pipe is in threaded connection with a hub connecting bolt; the triggering nail is arranged at the front end of the connecting nut pipe; and the distance between the trigger nail and the speed measurement sensor is 3mm to 5mm. Through the above scheme, the device has the advantages of simple structure, reliable triggering, low investment cost, convenient adjustment and the like, and has very high practical value and popularization value in the technical field of wind driven generator rotation speed measurement.

Description

TECHNICAL FIELD

[0001] The utility model relates to wind driven generator rotation speed measurement technical field especially a kind of wind driven generator rotation speed trigger device. BACKGROUND

[0002] The rotation speed measurement of wind driven generator is very important in wind power generation system, which is directly related to the operation state of generator, power output and the safety and efficiency of system. At present, the rotation speed measurement method in prior art mainly includes direct measurement method and indirect measurement method. Among them, the direct measurement method is to measure the rotation speed by sensor installed on the shaft of generator. The advantage of this method is high measurement accuracy, which can reflect the change of rotation speed in real time. The indirect measurement method is to indirectly calculate the rotation speed by measuring other physical quantities (such as voltage, frequency, etc.) related to rotation speed. The advantage of this method is that it does not need to directly contact rotating parts, which is suitable for some occasions where direct measurement is difficult. Among them, the direct measurement method is accurate and reliable, but it needs to lay corresponding sensor equipment in advance. The present technology is mainly aimed at the modification of offshore large megawatt (8.5MW) unit, the main shaft 200 and bearing seat 100 (laid in cabin) are a whole, the wind driven generator hub 300 is connected with the main shaft 200 in cabin by hub connecting bolt 400. Among them, it is more difficult to lay traditional speed measuring fluted disc on the main shaft 200 or wind driven generator hub 300, that is, the diameter of the required speed measuring fluted disc is large, and the installation space is limited, and the later precision adjustment is not convenient.

[0003] Therefore, it is urgent to provide a wind driven generator rotation speed trigger device with simple structure and reliable triggering. UTILITY MODEL CONTENT

[0004] In view of the above problems, the purpose of the utility model is to provide a wind driven generator rotation speed trigger device, and the technical scheme adopted by the utility model is as follows:

[0005] A wind driven generator rotation speed trigger device is arranged on the hub connecting bolt between the main shaft and the wind driven generator hub, and cooperates with the sensor mounting bracket on the cabin of wind driven generator. A speed measuring sensor is arranged on the sensor mounting bracket. The wind driven generator rotation speed trigger device comprises a connecting nut pipe connected with the hub connecting bolt by thread, a trigger spike arranged at the front end of the connecting nut pipe, and a threaded hole arranged in the connecting nut pipe. The distance between the trigger spike and the speed measuring sensor is 3mm-5mm.

[0006] Further, a gasket is arranged between the rear end of the connecting nut pipe and the hub connecting bolt.

[0007] Compared with the prior art, the utility model has the following beneficial effects:

[0008] (1) The utility model discloses a plurality of wheel hub connecting bolts between the main shaft and the wind driven generator wheel hub are used as mounting points, and the utility model discloses a plurality of wheel hub connecting bolts are arranged around the front end of the main shaft, and the center of the track of the rotating wheel hub connecting bolt is on the axis of the main shaft, so that the accuracy and reliability of the speed measurement can be ensured.

[0009] (2) The utility model discloses a connecting nut pipe and a trigger nail are arranged, and the lengths of the protruding parts of the dozens or hundreds of wheel hub connecting bolts are uneven, the connecting nut pipe is rotated, the dozens of trigger nails are leveled, and the accuracy and reliability of the speed measurement can be ensured. Meanwhile, the connecting nut pipe and the trigger nail have small occupied area, low investment cost and convenient and reliable adjustment.

[0010] In conclusion, the utility model has the advantages of simple structure, reliable triggering, low investment cost, convenient adjustment and the like, and has high practical value and popularization value in the field of wind driven generator rotation speed measurement technology. DRAWINGS

[0011] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as the limitation to the protection scope, and the related drawings can also be obtained by the drawings for the person skilled in the art without the creative labor.

[0012] Figure 1 It is the installation schematic view of the wind driven generator wheel hub in the prior art.

[0013] Figure 2 It is the installation schematic view of the bearing seat and the main shaft in the prior art.

[0014] Figure 3 It is the installation schematic view of the utility model.

[0015] Figure 4 It is the structural schematic view of the utility model.

[0016] Figure 5 It is the sectional view of the utility model.

[0017] In the above drawings, the component names corresponding to the reference signs are as follows:

[0018] 100, bearing seat; 200, main shaft; 300, wind driven generator wheel hub; 400, wheel hub connecting bolt; 1, rotation speed trigger assembly; 2, sensor mounting frame; 11, connecting nut pipe; 12, trigger nail; 13, threaded hole. DETAILED DESCRIPTION

[0019] For the purposes of the present application, the technical solutions and advantages thereof are more apparent, the present application will be further described below in conjunction with the drawings and embodiments, the embodiments of the present application include but are not limited to the following embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0020] In the present embodiment, the term "and / or" is merely a description of the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist simultaneously, and B exists alone.

[0021] The terms "first" and "second" and the like in the description and claims of the present embodiment are used to distinguish different objects, and are not used to describe the specific order of the objects. For example, the first target object and the second target object are used to distinguish different target objects, and are not used to describe the specific order of the target objects.

[0022] In the embodiments of the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design schemes. Rather, the use of "exemplary" or "for example" is intended to present relevant concepts in a concrete manner.

[0023] In the description of the embodiments of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. For example, a plurality of processing units refers to two or more processing units; a plurality of systems refers to two or more systems.

[0024] As Figures 1 to 5 As shown in the figure, the present embodiment provides a wind turbine speed triggering device, which is arranged on the hub connecting bolt 400 between the main shaft 200 and the hub 300 of the wind turbine, and cooperates with the sensor mounting bracket 2 on the nacelle of the wind turbine. Wherein, the speed sensor is arranged on the sensor mounting bracket 2. Here, in order to ensure more accurate and reliable speed measurement, the wind turbine speed triggering device is usually provided with 6 or more. In the present embodiment, the sensor mounting bracket 2 is installed on the nacelle, which is a non-rotating part.

[0025] Here, the wind turbine speed trigger device includes a connecting nut pipe 11 connected with the hub connecting bolt 400 by thread, a trigger pin 12 arranged at the front end of the connecting nut pipe 11, and a threaded hole 13 arranged in the connecting nut pipe 11. The distance between the trigger pin 12 and the speed sensor is 3-5 mm. In addition, a gasket can be arranged between the rear end of the connecting nut pipe 11 and the hub connecting bolt 400. The embodiment prevents the connecting nut pipe 11 from loosening by arranging the gasket. Meanwhile, the distance between the trigger pin 12 and the speed sensor can be adjusted by increasing the number of gaskets, thereby meeting the trigger distance (3-5 mm) requirement. When installing, the bolt fastening glue can be applied on the hub connecting bolt 400 and / or in the threaded hole 13.

[0026] The above embodiments are only preferred embodiments of the utility model, and are not a limitation on the protection scope of the utility model. Any change made by using the design principle of the utility model and on the basis of non-creative labor shall belong to the protection scope of the utility model.

Claims

1. A wind turbine generator speed triggering device, characterized in that, The wind turbine speed triggering device is mounted on the hub connecting bolt (400) between the main shaft (200) and the wind turbine hub (300), and cooperates with the sensor mounting bracket (2) on the nacelle of the wind turbine; a speed sensor is mounted on the sensor mounting bracket (2); several wind turbine speed triggering devices are provided; each wind turbine speed triggering device includes a connecting nut tube (11) that is threadedly connected to the hub connecting bolt (400), a trigger pin (12) located at the front end of the connecting nut tube (11), and a threaded hole (13) located in the connecting nut tube (11); the distance between the trigger pin (12) and the speed sensor is 3mm to 5mm.

2. The wind turbine generator speed triggering device according to claim 1, characterized in that, A washer is provided between the rear end of the connecting nut tube (11) and the hub connecting bolt (400).

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