Monitoring device for sliding yaw system of wind turbine generator and wind turbine generator

Abstract

The utility model discloses a wind turbine generator sliding yaw system monitoring device and a wind turbine generator, the sliding yaw system comprises a cabin support, a yaw gear ring, a brake caliper body and a friction plate, the friction plate is extruded between the cabin support and the upper end face of the yaw gear ring along the vertical direction, the brake caliper body is fixedly connected with the cabin support, and the brake caliper body is fixedly connected with the cabin support. The friction plate is limited between the cabin support and the brake caliper body in the transverse direction and provided with a blind hole extending upwards by a certain depth from the bottom face, and a through hole is formed in the position, corresponding to the blind hole, of the cabin support. The monitoring device comprises a piezoelectric plate and a signal emitter which are installed in the blind hole and connected with each other, and a signal receiver installed in the through hole, and the piezoelectric plate and the upper end face of the yaw gear ring are spaced by a certain distance. According to the monitoring device, the problem that the abrasion loss of the sliding yaw bearing of the wind turbine generator is difficult to measure is solved, the convenience of maintenance work is improved through automatic early warning, and the safety and the reliability of operation of the wind turbine generator are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power generation, and particularly relates to a monitoring device for a sliding yaw system of a wind turbine and a wind turbine. Background Art

[0002] The yaw system of a wind turbine has two forms: a rolling bearing and a sliding bearing. In recent years, due to the lower cost of the sliding bearing and the problem of no hydraulic leakage, the yaw system of a wind turbine has increasingly adopted the form of a sliding bearing. The sliding bearing is generally made of wear-resistant and pressure-resistant materials. The upper friction plate of the sliding bearing is relatively thin and is placed between the nacelle support and the yaw ring to play a role in anti-wear and support. Since the nacelle of the wind turbine presses on the sliding bearing, the space is very narrow and the nacelle weight is very high, making it difficult to lift. Therefore, it is difficult for the staff to detect the wear amount of the sliding bearing. If the wear amount is too large, it will cause the nacelle support to collide with the ring gear, resulting in an accident. Therefore, a reasonable method for monitoring the wear amount of the sliding bearing of the yaw system is needed to realize the safety monitoring of the sliding yaw system of the wind turbine. [[ID=IO]]Summary of the Utility Model

[0003] The purpose of the utility model is to propose a monitoring device for a sliding yaw system to solve the problems existing in the prior art.

[0004] To achieve the above purpose, the utility model proposes a monitoring device for a sliding yaw system of a wind turbine. The sliding yaw system includes a nacelle support, a yaw ring, a brake caliper body, and a friction plate. The friction plate is vertically squeezed between the nacelle support and the upper end face of the yaw ring. The brake caliper body is fixedly connected to the nacelle support, so that the friction plate is horizontally limited between the nacelle support and the brake caliper body. The friction plate is provided with a blind hole extending upward from the bottom surface to a certain depth. The nacelle support is provided with a through hole at a position corresponding to the blind hole. The monitoring device includes a piezoelectric sheet and a signal transmitter connected to each other installed in the blind hole and a signal receiver installed in the through hole. The piezoelectric sheet is spaced from the upper end face of the yaw ring by a certain distance.

[0005] Further, the upper end of the signal receiver is connected to the unit control cabinet through an electric wire.

[0006] Further, the friction plate is provided with a hole for signal transmission between the signal transmitter and the signal receiver.

[0007] Further, the piezoelectric sheet is spaced from the upper end face of the yaw ring by 3-6 mm.

[0008] The utility model also provides a wind turbine, which includes the monitoring device for the sliding yaw system of the wind turbine.

[0009] The monitoring device of the sliding yaw system of the wind turbine of the present utility model solves the problem that it is difficult to measure the wear amount of the sliding yaw bearing of the wind turbine, improves the convenience of maintenance work through automatic early warning, and improves the safety and reliability of the operation of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The following drawings of the present utility model are used as a part of the present utility model to understand the present utility model. The embodiments and descriptions of the present utility model are shown in the drawings to explain the device and principle of the present utility model. In the drawings,

[0011] Figure 1 is a schematic structural diagram of the monitoring device of the sliding yaw system of the wind turbine according to the embodiment of the present utility model.

[0012] Reference numerals:

[0013] 1. Piezoelectric sheet;

[0014] 2. Signal transmitter;

[0015] 3. Signal receiver;

[0016] 4. Electric wire;

[0017] 5. Cabin support;

[0018] 6. Yaw gear ring;

[0019] 7. Brake caliper body;

[0020] 8. Friction plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. The described embodiments are only preferred embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] It should be understood that unless otherwise defined, the technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the technical field of the present utility model. The purpose of the terms used herein is only to describe specific embodiments and is not a limitation of the present utility model. Terms such as "part" and "component" herein can represent a single part or a combination of multiple parts. The singular forms of "a", "an" and "the" are also intended to include the plural forms unless the context clearly indicates otherwise. Ordinal numbers such as "first" and "second" are merely identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" does not imply the existence of a "second component" by itself, and the term "second component" does not imply the existence of a "first component" by itself. When the terms "comprise" and / or "include" are used in this specification, they indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations. Terms such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "center", "vertical", "horizontal" and similar expressions are for illustrative purposes only and not limitations. The terms "connect", "install", "connect to", "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The features described in one embodiment herein can be applied alone or in combination with other features to another embodiment, unless the feature is not applicable or otherwise stated in that other embodiment.

[0023] Hereinafter, specific embodiments of the present utility model will be described in more detail with reference to the accompanying drawings. These drawings show representative embodiments of the present utility model and do not limit the present utility model.

[0024] The present utility model provides a monitoring device for a sliding yaw system of a wind turbine. As Figure 1As shown in the figure, the sliding yaw system includes a nacelle support 5, a yaw ring gear 6, a brake caliper 7 and a friction plate 8. The friction plate 8 is vertically squeezed between the nacelle support 5 and the upper end face of the yaw ring gear 6. The brake caliper 7 is fixedly connected to the nacelle support 5, so that the friction plate 7 is horizontally limited between the nacelle support 5 and the brake caliper 7. The friction plate 8 is provided with a blind hole extending upward from the bottom surface to a certain depth. The nacelle support 5 is provided with a through hole at a position corresponding to the blind hole. The monitoring device includes a piezoelectric sheet 1 and a signal transmitter 2 installed in the blind hole of the friction plate 8 and a signal receiver 3 installed in the through hole of the nacelle support 5. The piezoelectric sheet 1 and the signal transmitter 2 are connected to each other and the piezoelectric sheet 1 is spaced from the upper end face of the yaw ring gear 6 by a certain distance.

[0025] During the yaw operation of the wind turbine generator set, sliding friction occurs between the friction plate and the yaw ring gear, which will continuously cause wear of the friction plate. By setting the above monitoring device in the sliding yaw system of the unit, as the wear amount of the friction plate increases, the piezoelectric sheet will get closer and closer to the upper end face of the yaw ring gear. When the wear amount of the friction plate reaches the set threshold, the yaw ring gear contacts the piezoelectric sheet and bears the upper pressure, causing the piezoelectric sheet to generate an electric current to provide an electric signal for the signal transmitter, and the signal is received by the signal receiver and transmitted to the upper control system, so as to provide the function of monitoring the wear of the friction plate for the staff. The utility model solves the problem that it is difficult to measure the wear amount of the sliding yaw bearing of the wind turbine generator set, improves the convenience of maintenance work through automatic warning, especially can reduce the work difficulty in maintenance-difficult working environments such as offshore units; and improves the safety and reliability of the unit operation.

[0026] According to an embodiment of the present utility model, the upper end of the signal receiver 3 is connected to the unit control cabinet through a wire 4, so that the staff can receive the wear alarm information and realize the control of the wear amount of the friction plate. The friction plate 8 can be provided with a channel for signal transmission between the signal transmitter 2 and the signal receiver 3, and the channel can be communicated with the through hole of the nacelle support 5. The wear amount threshold of the friction plate can be set according to the specific structure of the sliding yaw system of the unit. For example, the clearance requirement between the nacelle support and the friction plate is taken as one of the consideration factors. Preferably, the piezoelectric sheet 1 is spaced from the upper end face of the yaw ring gear 6 by 3-6 mm.

[0027] The present utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of illustration and example, and are not intended to limit the present utility model within the scope of the described embodiments. In addition, those skilled in the art can understand that the present utility model is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present utility model, and these variations and modifications all fall within the scope of protection required by the present utility model. The scope of protection of the present utility model is defined by the appended claims and their equivalent scope.

Claims

1. A monitoring device for a sliding yaw system of a wind turbine, wherein the sliding yaw system comprises a nacelle bracket (5), a yaw gear ring (6), a brake caliper (7) and a friction plate (8), wherein the friction plate (8) is vertically squeezed between the nacelle bracket (5) and the upper end surface of the yaw gear ring (6), and the brake caliper (7) is fixedly connected to the nacelle bracket (5) so that the friction plate (8) is laterally limited between the nacelle bracket (5) and the brake caliper (7), characterized in that: The friction plate (8) is provided with blind holes extending a certain depth upward from the bottom surface. The nacelle bracket (5) is provided with through holes at positions corresponding to the blind holes. The monitoring device includes a piezoelectric sheet (1) and a signal transmitter (2) which are connected to each other and installed in the blind holes, and a signal receiver (3) installed in the through holes. The piezoelectric sheet (1) is spaced a certain distance from the upper end surface of the yaw ring gear (6).

2. The monitoring device for the sliding yaw system of a wind turbine according to claim 1, characterized in that: The upper end of the signal receiver (3) is connected to the unit control cabinet through an electric wire (4).

3. The monitoring device for the sliding yaw system of a wind turbine according to claim 1, characterized in that, The friction plate (8) is provided with a hole for signal transmission between the signal transmitter (2) and the signal receiver (3).

4. The monitoring device for the sliding yaw system of a wind turbine according to any one of claims 1-3, characterized in that The piezoelectric sheet (1) is spaced 3-6 mm from the upper end surface of the yaw ring gear (6).

5. A wind turbine unit, characterized in that, The wind turbine unit includes the monitoring device of the sliding yaw system of the wind turbine unit according to any one of claims 1 to 4.

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