WO2022165866A1 - 一种风电变桨导电滑环 - Google Patents

一种风电变桨导电滑环 Download PDF

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Publication number
WO2022165866A1
WO2022165866A1 PCT/CN2021/077218 CN2021077218W WO2022165866A1 WO 2022165866 A1 WO2022165866 A1 WO 2022165866A1 CN 2021077218 W CN2021077218 W CN 2021077218W WO 2022165866 A1 WO2022165866 A1 WO 2022165866A1
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Prior art keywords
slip ring
rotor
stator
conductive
conductive shaft
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PCT/CN2021/077218
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English (en)
French (fr)
Inventor
高德山
张广璐
孙涛
王丰成
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华研风电设备制造（大连）有限公司
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Publication of WO2022165866A1 publication Critical patent/WO2022165866A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/08—Slip-rings

Definitions

  • the utility model relates to a conductive slip ring, in particular to a variable pitch conductive slip ring for wind power generators.
  • Conductive slip rings also known as rotary electrical interfaces, electrical rotary joints, can be used in any system that requires the transmission of power and data signals from a fixed structure to a rotating structure during unrestricted continuous rotation. Often used in electromechanical systems that require unlimited, continuous or intermittent rotation to transmit power and data signals, it can simplify and improve system performance without damaging wires.
  • the conductive slip ring is the main electrical device that realizes the transmission of signals and power to the rotating body.
  • the structure is composed of a ring body (also called a collector ring), a brush, a conductive slip ring bracket, a bearing, and a bearing end cover. When the conductive slip ring is working, the ring body and the brush keep sliding contact to realize the signal and power. transmission.
  • the conductive slip ring is specially designed to connect and transmit energy and electrical signals for the rotating body.
  • the pitch conductive slip ring of the wind turbine is the key equipment for connecting the wind turbine nacelle and the hub power and signal.
  • the rotor part is connected with the stator part through the bearing to form the main structure in which the rotor and the stator rotate relative to each other. , so that the conductive shaft of the slip ring can rotate with the rotor casing, and the conductive ring on the conductive shaft of the slip ring and the brush installed on the stator casing form a relatively rotating friction pair, so as to realize the unrestricted rotation to connect the power and the signal. Function.
  • the above conductive slip ring structure is currently commonly used in the industry, and can also meet the requirements of slip ring operation in terms of performance.
  • Due to the relatively high precision requirements for the rotation of the slip ring conductive shaft The structure in which both ends of the body are supported by bearings at both ends of the conductive shaft of the slip ring causes a relatively high dependence on the machining and assembly accuracy of the stator housing, which will inevitably increase the production cost.
  • the pitch conductive slip ring is the core component of the wind turbine pitch, and the friction pair inside the slip ring is unavoidable to wear with the rotation of the fan. Yes, maintenance has become a top priority.
  • the conductive slip ring structure widely used in the industry presents a problem in the face of maintenance and replacement, that is, the maintenance of the friction pair of the conductive slip ring is difficult, especially when the conductive shaft of the slip ring needs to be replaced, due to structural reasons , to replace the conductive shaft, the rotor housing and the bearing connecting the rotor and the stator must be disassembled.
  • Frequent maintenance and replacement of the conductive shaft requires special personnel to operate, which not only wastes manpower, but also requires downtime during the replacement process, and the production work also leads to termination. Further, this maintenance operation will also damage the cooperation structure between the slip ring rotor and the stator to a certain extent, and may also cause damage to the components, and even re-assembly will adversely affect the reliable operation of the slip ring.
  • the purpose of the utility model is to provide a pitch-variable conductive slip ring with a single-end support structure of a conductive shaft, which includes a stator part and a rotor part. It is characterized in that: the front end of the stator casing is connected to the rotor casing through a bearing, the stator casing is fixedly connected to one end of the slip ring conductive shaft through the bearing, and one end of the slip ring conductive shaft is fixedly connected to the rotor casing, and the sliding ring conductive shaft is fixedly connected to the rotor casing. The other end of the ring conductive shaft is not connected with the end of the stator housing.
  • the characteristic of the pitch conductive slip ring of the utility model is that only one bearing is used to realize the mutual connection between the stator housing, the rotor housing and the conductive shaft, and the use of bearings is reduced compared with the traditional structure of the pitch conductive slip ring. The number and the processing difficulty of the stator casing are reduced, and the cost is saved. Since only one end of the slip ring conductive shaft is connected to the stator casing, the slip ring conductive shaft can be used without removing the rotor casing and connecting the rotor and the stator bearing. Easy to install or remove.
  • the front end of the conductive shaft of the slip ring is provided with a fixed flange. Except for the fixed flange, the outer diameter of the conductive shaft of the slip ring is smaller than the size of the following positions: the diameter of the inner hole of the rotor housing, the diameter of the inner hole of the bearing and the The diameter of the opening at the front end of the stator housing.
  • the slip ring conductive shaft when installed, it sequentially passes through the inner hole of the rotor casing, the inner hole of the bearing and the front end opening of the stator casing, and is fixed to the rotor casing through the fixing flange at the front end of the slip ring conductive shaft connect.
  • the second end of the slip ring conductive shaft is connected with the encoder through a coupling.
  • the rotor part includes a rotor-side electrical interface
  • the stator part includes a stator-side electrical interface, so that the stator-side electrical interface is electrically connected to the conductive shaft of the slip ring through the stator cable;
  • the rotor cable is electrically connected to the conductive shaft of the slip ring.
  • the utility model has the advantages that the function of the slip ring conductive shaft rotating with the slip ring rotor casing in the stator casing is realized by means of single-end support, the production process of the slip ring is optimized, the production cost of the slip ring is reduced, and the slip ring is increased. The ease of maintenance of the ring reduces the maintenance cost of the slip ring.
  • FIG. 1 is a schematic diagram of the structure of the slip ring body of the present invention.
  • the present utility model provides a wind power generation pitch conductive slip ring
  • the body structure mainly includes a rotor casing (1), a bearing (2), a stator casing (3), a slip ring conductive shaft (6) ), the stator-side electronic interface (7), the rotor-side electrical interface (8), the encoder (9) and the coupling (10).
  • the stator housing (3) includes a front end (4) of the stator housing and an end (5) of the stator housing; the front end (4) of the stator housing is connected to the rotor housing (1) through a bearing (2), and the stator housing (3)
  • the bearing (2) is fixedly connected to one end of the slip ring conductive shaft (6), one end of the slip ring conductive shaft (6) is fixedly connected to the rotor housing (1), and the slip ring conductive shaft (6) ) has no connection with the end (5) of the stator housing.
  • slip ring conductive shaft (6) can be installed or removed from the rotor side without removing the rotor housing (1) and the bearing (2).
  • One end of the slip ring conductive shaft (6) fixed on the rotor casing (1) extends from the front end (4) of the stator casing to the end (5) of the stator casing to the end of the slip ring conductive shaft (6). another side.
  • the coupling (10) is located at the end (5) of the stator housing, and the other end of the slip ring conductive shaft (6) is connected with the encoder (9) through the coupling (10).
  • the coupling (10) used to connect the conductive shaft (6) of the slip ring and the encoder (9) usually needs to have the following characteristics: zero backlash, the coupling as a whole is not allowed to have backlash during the transmission process; low inertia, On the basis of ensuring the transmission strength, the weight of the coupling should be reduced as much as possible; the encoder coupling with good elasticity and precision needs to absorb the deviation between the shaft and the shaft during the installation process; Clockwise and counterclockwise rotation characteristics are exactly the same.
  • stator part is provided with a stator-side electrical interface (7), so that the stator-side electrical interface (7) forms an electrical connection with the slip ring conductive shaft (6) through a stator cable (not shown in FIG. 1 ); similarly
  • the rotor part is provided with a rotor-side electrical interface (8), so that the rotor-side electrical interface (8) forms an electrical connection with the slip ring conductive shaft (6) through a rotor cable (not shown in Figure 1).
  • the other end of the slip ring conductive shaft (6) and the end of the stator housing (5) In the case of no connection, the outer diameter of the slip ring conductive shaft (6) is less than Dimensions for the following locations: rotor housing (1) bore diameter, bearing (2) bore diameter and stator housing (3) front opening diameter.
  • the flange is fixedly connected to the rotor housing (1); when the slip ring conductive shaft (6) is disassembled, the slip ring can be removed as long as the fixed flange at the front end of the slip ring conductive shaft (6) is released from the fixed connection to the rotor housing (1).
  • the conductive shaft (6) is drawn out from the front opening of the stator housing (3), the inner hole of the bearing (2), and the inner hole of the rotor housing (1) in sequence.
  • the pitch conductive slip ring of the utility model is characterized in that only one bearing (2) is used to realize the mutual connection relationship among the stator housing (3), the rotor housing (1) and the slip ring conductive shaft (6). That is, at the connection between the rotor casing (1) and the stator casing (3), one end of the slip ring conductive shaft (6) of the conductive slip ring is first connected to the rotor casing (1) by a fixed way, and the rotor casing ( 1) The front end of the stator housing (3) is connected through the unique bearing (2) adopted in the wind power generation pitch conductive slip ring proposed by the present invention.
  • one end of the slip ring conductive shaft (6) is also fixedly connected to the stator housing (3) at a position located at the front end (4) of the stator housing through the bearing (2).
  • the slip ring conductive shaft (6) it is located at the position of the stator housing end (5), and the other end of the slip ring conductive shaft (6) is not connected to the stator housing end (5). That is to say, once the fixed connection device (not shown in FIG. 1 ) of the slip ring conductive shaft (6) and the rotor casing (1) is released, the slip ring conductive shaft (6) can be easily removed from the inside of the device Pull out, so it is very convenient to replace.
  • the utility model adopts the single-end support method to realize the function of the slip ring conductive shaft rotating with the slip ring rotor casing in the stator casing, which not only optimizes the slip ring production process , the production cost of the slip ring is reduced, and the convenience of maintenance of the slip ring is further increased while the maintenance cost of the slip ring is reduced.

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  • Motor Or Generator Current Collectors (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

本实用新型公开了一种具有新型结构的变桨导电滑环，包括定子部分、转子部分。其特征在于：定子壳体前端通过轴承连接转子壳体，所述定子壳体通过所述轴承与滑环导电轴一端固定连接，所述滑环导电轴一端与转子壳体固定连接，所述滑环导电轴另一端与所述定子壳体末端无连接。本实用新型变桨导电滑环的特点是只使用了一个轴承实现了定子壳体、转子壳体、导电轴之间的相互连接关系，相比于变桨导电滑环传统结构减少了轴承的使用数量和降低了定子壳体的加工难度，节约了成本，并且，由于滑环导电轴只有一端与定子壳体连接，滑环导电轴能够在不拆除转子壳体和连接转子与定子的轴承的情况下方便地安装或拆卸。

Description

一种风电变桨导电滑环 技术领域
本实用新型涉及一种导电滑环，特别涉及一种风力发电机用变桨导电滑环。
背景技术
导电滑环，也称作旋转电气接口、电气旋转关节，可用于任一要求无限制连续旋转时从固定结构到旋转结构传输电源和数据信号的系统中。常常被使用在要求无限制、连续或者间断旋转，传输电源和数据信号的机电系统中，能简化和改进系统性能，并且不损坏导线。目前，导电滑环是对旋转动态实现信号和功率传输的主要电器装置，主要由环体和电刷接触的方式，并做相对旋转运动实现对旋转体上进行信号和功率的传输，他的主要构造是由环体(也称集电环)、电刷、导电滑环支架、轴承、轴承端盖组合而成，导电滑环在工作的时候环体和电刷保持滑动接触，实现信号和功率的传输。导电滑环专门为旋转体连通、输送能源与电气信号，而对于风力发电领域，风力发电机机的变桨导电滑环是连通风力发电机机舱与轮毂电力和信号的关键设备。
目前风力发电机中绝大部分的变桨方式是采用电变桨，电变桨方式就是通过导电滑环向旋转的轮毂电机提供电源和通讯信号，而现有的传统变桨导电滑环通常采用这样的结构设计：
转子部分通过轴承与定子部分连接，形成转子与定子相对旋转的主结构，滑环的导电轴两端分别通过轴承固定在定子壳体上，然后滑环导电轴的一端再与转子壳体固定相连，使滑环导电轴能够随着转子壳体一同旋转，滑环导电轴上的导电环与安装在定子壳体上的电刷形成相对旋转的摩擦副，从而实现无限制旋转连通电力与信号的功能。
上述的导电滑环结构目前被业界普通使用，在性能上也能够满足滑环运行 的要求，但是，由于滑环导电轴旋转有比较高的精度要求，为了满足这一精度要求，传统的定子壳体两端通过轴承支撑滑环导电轴两端的结构造成了对定子壳体的加工和组装精度有比较高的依赖性，这样，势必增加了生产成本。同时，随着风电行业的发展，风力发电机的运行维护工作日益变的重要起来，变桨导电滑环作为风力发电机变桨的核心部件，滑环内部的摩擦副随着风机旋转磨耗是不可避免的，维护保养工作成为重中之重。风力发电机旋转的轮毂中存在大量机油，在不断旋转的过程中，机油会通过轮毂与导电滑环连接的部位渗透到导电滑环内部，从而污染滑环内部的核心部件，例如污染环道与刷丝，从而影响导电滑环的稳定性、缩短导电滑环的维护周期、降低导电滑环的使用寿命。这就需要频繁、定期地对导电滑环进行维护和更换。目前被业界广泛使用的导电滑环结构在面对维护和更换时凸显出一个问题，就是导电滑环的摩擦副维护保养比较困难，特别体现在滑环导电轴需要更换的时候，由于结构的原因，更换导电轴必须拆卸转子壳体与连接转子与定子的轴承。频繁地维护和更换导电轴，需要专人进行操作，这不仅浪费人力，而且更换过程还需要停机，生产工作也因此而导致终端。进一步地，这种维护操作还会在一定程度上破坏滑环转子与定子之间的配合结构，也有可能造成部件的损坏，即使再次组装也对滑环的可靠运行产生不良影响。
实用新型内容
本实用新型的目的在于提出一种具有导电轴单端支撑结构的变桨导电滑环，包括定子部分、转子部分。其特征在于：定子壳体前端通过轴承连接转子壳体，所述定子壳体通过所述轴承与滑环导电轴一端固定连接，所述滑环导电轴一端与转子壳体固定连接，所述滑环导电轴另一端与所述定子壳体末端无连接。本实用新型变桨导电滑环的特点是只使用了一个轴承实现了定子壳体、转 子壳体、导电轴之间的相互连接关系，相比于变桨导电滑环传统结构减少了轴承的使用数量和降低了定子壳体的加工难度，节约了成本，并且，由于滑环导电轴只有一端与定子壳体连接，滑环导电轴能够在不拆除转子壳体和连接转子与定子的轴承的情况下方便地安装或拆卸。
进一步地，所述滑环导电轴前端设有固定法兰，除该固定法兰外，所述滑环导电轴的外径尺寸小于下列位置的尺寸：转子壳体内孔直径、轴承内孔直径和定子壳体前端开孔直径。
进一步地，所述滑环导电轴安装时依次穿过转子壳体的内孔、轴承的内孔和定子壳体的前端开孔，并通过滑环导电轴前端的固定法兰与转子壳体固定连接。
进一步地，所述滑环导电轴的第二端通过联轴器与编码器连接。
进一步地，所述转子部分包括转子侧电气接口，所述定子部分包括定子侧电气接口，如此，定子侧电气接口通过定子电缆线与滑环导电轴形成电气连接；同样地，转子侧电气接口通过转子电缆线与滑环导电轴形成电气连接。
本实用新型的优点在于：采用单端支撑的方式实现了滑环导电轴在定子壳体内随滑环转子壳体旋转的功能，优化了滑环生产工艺，降低了滑环生产成本，增加了滑环的维护的方便性的同时降低了滑环的维护成本。
本专利将结合附图和实施例对本实用新型做详细描述。
附图说明
为了更清楚地说明本实用新型实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图做以简单地介绍，显而易见地，下面描述中的附图是本实用新型的一个实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本实用新型的滑环本体结构示意图。
具体实施例
如图1所示，本实用新型提供了一种风力发电变桨导电滑环，本体结构主要包括转子壳体(1)、轴承(2)、定子壳体(3)、滑环导电轴(6)、定子侧电子接口(7)、转子侧电气接口(8)、编码器(9)以及联轴器(10)。其中，定子壳体(3)包括定子壳体前端(4)和定子壳体末端(5)；定子壳体前端(4)通过轴承(2)连接转子壳体(1)，所述定子壳体(3)通过所述轴承(2)与滑环导电轴(6)一端固定连接，所述滑环导电轴(6)一端与转子壳体(1)固定连接，所述滑环导电轴(6)另一端与所述定子壳体末端(5)无连接。
其中，滑环导电轴(6)可以在不拆除转子壳体(1)及轴承(2)的情况下从转子侧安装或拆卸。
其中，固定在转子壳体(1)的滑环导电轴(6)的一端自定子壳体前端(4)至定子壳体末端(5)的方向延伸至该滑环导电轴(6)的另一端。联轴器(10)位于定子壳体末端(5)，且滑环导电轴(6)的另一端通过联轴器(10)与编码器(9)连接。
用于连接滑环导电轴(6)与编码器(9)的联轴器(10)通常需要具备以下几个特点：零间隙，联轴器整体在传动过程中不允许有间隙；低惯量，在确保传动强度的基础之上，应尽可能降低联轴器的重量；弹性好，精密的编码器联轴器，需要吸收在安装过程中产生的轴与轴之间的偏差；结构紧凑，顺时针与逆时针回转特性完全相同。
其中，定子部分上设置有定子侧电气接口(7)，这样，定子侧电气接口(7)通过定子电缆线(图1中未示出)与滑环导电轴(6)形成电气连接；同样地，转子部分上设置有转子侧电气接口(8)，这样，转子侧电气接口(8)通过转子 电缆线(图1中未示出)与滑环导电轴(6)形成电气连接。
而且，为了实现滑环导电轴能够在不拆除转子壳体和连接转子与定子的轴承的情况下方便地安装或拆卸，在所述滑环导电轴(6)另一端与所述定子壳体末端(5)无连接的情况下，除滑环导电轴前端用于固定该滑环导电轴(6)与转子壳体(1)的固定法兰外，滑环导电轴(6)外径尺寸小于下列位置的尺寸：转子壳体(1)内孔直径、轴承(2)内孔直径和定子壳体(3)前端开孔直径。滑环导电轴(6)安装时依次穿过转子壳体(1)内孔、轴承(2)内孔和定子壳体(3)前端开孔，并通过滑环导电轴(6)前端的固定法兰与转子壳体(1)固定连接；滑环导电轴(6)拆卸时只要解除滑环导电轴(6)前端的固定法兰与转子壳体(1)固定连接，便能够将滑环导电轴(6)依次从定子壳体(3)前端开孔、轴承(2)内孔、转子壳体(1)内孔抽出。
本实用新型变桨导电滑环的特点是只使用了一个轴承(2)实现了定子壳体(3)、转子壳体(1)、滑环导电轴(6)之间的相互连接关系。即，在转子壳体(1)与定子壳体(3)连接处，导电滑环的滑环导电轴(6)的一端首先通过固定的方式连接转子壳体(1)，而转子壳体(1)再通过本发明提出的风力发电变桨导电滑环中所采用的唯一轴承(2)而连接定子壳体(3)的前端。并且滑环导电轴(6)的一端也通过该轴承(2)在位于定子壳体前端(4)的位置处与定子壳体(3)固定连接。对于滑环导电轴(6)的另一端而言，其位于定子壳体末端(5)的位置处，并且该滑环导电轴(6)的另一端与定子壳体末端(5)无连接。也就是说，一旦解除了滑环导电轴(6)与转子壳体(1)的固定连接装置(图1中未示出)后，滑环导电轴(6)即可非常方便地从装置内部抽出，因此更换起来非常方便。反过来说，当将需要更换的滑环导电轴(6)抽出后，只要将新的滑环导电轴(6)插入相应的位置，就能实现滑环导电轴的快速定位， 并且此后将其与转子壳体(1)重新固定，即可实现滑环导电轴的更换。
针对本实用新型提出的上述方案，实际上本实用新型采用的是单端支撑的方式来实现滑环导电轴在定子壳体内随滑环转子壳体旋转的功能，这样不仅优化了滑环生产工艺，降低了滑环生产成本，而且进一步地增加了滑环维护的方便性的同时降低了滑环的维护成本。
最后应说明的是：本专利并不局限于上述具体实施例，凡在本实用新型的精神和原则之内所作的任何修改、等同替换、改进等，均应包含在本实用新型的保护范围之内。

Claims (7)

  1. 一种变桨导电滑环,包括定子部分和转子部分，其特征在于：所述定子部分的定子壳体前端通过轴承连接所述转子部分的转子壳体，所述定子壳体通过所述轴承与滑环导电轴的第一端固定连接，所述滑环导电轴的第一端与转子壳体固定连接，所述滑环导电轴的第二端与所述定子壳体末端无连接，所述滑环导电轴能够在不拆除所述转子壳体和连接转子与定子的轴承的情况下方便地安装或拆卸。
  2. 根据权利要求1所述的变桨导电滑环，其特征在于：固定在转子壳体的滑环导电轴的第一端自定子壳体前端至定子壳体末端的方向延伸至该滑环导电轴的第二端。
  3. 根据权利要求1所述的变桨导电滑环，其特征在于：所述滑环导电轴的第一端设有固定法兰，除该固定法兰外，所述滑环导电轴的外径尺寸小于下列位置的尺寸：转子壳体内孔直径、轴承内孔直径和定子壳体前端开孔直径。
  4. 根据权利要求2所述的变桨导电滑环，其特征在于：所述滑环导电轴安装时依次穿过转子壳体的内孔、轴承的内孔和定子壳体的前端开孔，并通过滑环导电轴前端的固定法兰与转子壳体固定连接。
  5. 根据权利要求1所述的变桨导电滑环,其特征在于：所述滑环导电轴的第二端通过联轴器与编码器连接。
  6. 根据权利要求1所述的变桨导电滑环，其特征在于：所述转子部分包括转子侧电气接口，所述定子部分包括定子侧电气接口。
  7. 根据权利要求6所述的变桨导电滑环，其特征在于：定子侧电气接口通过定子电缆线与滑环导电轴形成电气连接；转子侧电气接口通过转子电缆线与滑环导电轴形成电气连接。
PCT/CN2021/077218 2021-02-04 2021-02-22 一种风电变桨导电滑环 WO2022165866A1 (zh)

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