Power-supply-free constant temperature device for rotating speed sensor of wind generating set

Abstract

The utility model provides a wind generating set rotation speed sensor power supply-free constant temperature device, which comprises a protection jacket, a heat exchange box, a liquid inlet pipe and a return pipe, the inner side wall of the protection jacket is matched with the rotation speed sensor in appearance, and an annular cavity capable of accommodating heat exchange media is arranged between the inner side wall and the outer side wall of the protection jacket; the upper end of the liquid inlet pipe and the upper end of the return pipe are respectively connected with the protective jacket and are communicated with the annular cavity of the protective jacket; the lower end of the liquid inlet pipe and the lower end of the backflow pipe are connected with the heat exchange box, and the lower end of the liquid inlet pipe is higher than the lower end of the backflow pipe. According to the utility model, the protective jacket can be sleeved on the rotating speed sensor of the wind generating set, the protective jacket and the heat exchange medium in the heat exchange box are naturally circulated, and the heat of the heat source where the heat exchange box is located is conveyed into the protective jacket, so that the constant-temperature environment of the rotating speed sensor is ensured; and no circuit lead exists, so that the electric appliance lead risk is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of wind generator set speed sensors, in particular to a power-free constant temperature device for a wind generator set speed sensor. Background Art

[0002] The impeller-side speed sensor of a wind turbine, installed near the hub, faces severe challenges in winter due to low temperatures. When temperatures drop too low, the speed sensor's sensitivity is significantly affected and can fail, posing a significant risk to the normal operation of the wind turbine.

[0003] In response to this, most wind farms generally use the solution of installing heating cables to insulate the speed sensor. This solution has played a role in resisting low temperatures to a certain extent, but it also has some problems that cannot be ignored:

[0004] First, when the weather warms up, the ambient temperature rises, but the heating tape may continue to release heat due to failure to stop heating in time or improper temperature adjustment; the speed sensor is more sensitive to temperature changes. Excessive temperature will affect the performance of its internal circuit and may even cause permanent damage, thereby affecting the normal monitoring and operation of the wind turbine.

[0005] Secondly, heating cables require an additional power source, which inevitably introduces risks with lead wires. In the complex environment of a wind farm, the lead wires can be affected by factors like wind and vibration, causing them to loosen or break. This not only affects the proper functioning of the heating cables but can also cause electrical faults like short circuits and leakage, posing a threat to the safe operation of the wind farm. Furthermore, laying the lead wires requires considerations such as waterproofing, moisture resistance, and corrosion resistance, increasing the difficulty and cost of construction and maintenance. Utility Model Content

[0006] The technical problem to be solved by the utility model is: how to ensure a constant temperature environment of a speed sensor and reduce the risk of electrical wiring.

[0007] The technical solution of the utility model to solve the above technical problems is as follows:

[0008] The utility model provides a power-free constant temperature device for a speed sensor of a wind turbine generator set, comprising a protective jacket, a heat exchange box, a liquid inlet pipe, and a return pipe. The inner side wall of the protective jacket matches the outer shape of the speed sensor, and an annular cavity capable of accommodating a heat exchange medium is provided between the inner side wall and the outer side wall of the protective jacket; the upper end of the liquid inlet pipe and the upper end of the return pipe are respectively connected to the protective jacket and communicate with the annular cavity of the protective jacket; the lower end of the liquid inlet pipe and the lower end of the return pipe are respectively connected to the heat exchange box, and the lower end of the liquid inlet pipe is higher than the lower end of the return pipe.

[0009] The beneficial effects of the utility model are:

[0010] By adopting the utility model, the protective jacket can be put on the speed sensor of the wind turbine generator set to play a role of heat preservation; the heat of the heat source where the heat exchange box is located is transferred to the protective jacket through natural circulation between the protective jacket and the heat exchange medium in the heat exchange box, thereby ensuring a constant temperature environment for the speed sensor; since the temperature of the heat exchange medium in the protective jacket is always lower than the heat source temperature and the natural circulation speed is slow, it is convenient to constrain the upper limit of the ambient temperature where the speed sensor is located, avoiding overheating failure and having good safety; in addition, the utility model does not have circuit leads, thereby avoiding the risk of electrical leads.

[0011] On the basis of the above technical solution, the present invention can also be improved as follows.

[0012] Furthermore, the protective jacket is cylindrical.

[0013] It is easy to make and helps to reduce costs.

[0014] Furthermore, a liquid inlet interface and a reflux interface are provided on the outer side wall of the protective jacket, the liquid inlet interface is connected to the upper end of the liquid inlet pipe, and the reflux interface is connected to the upper end of the reflux pipe.

[0015] Can be disassembled and assembled repeatedly for easy maintenance.

[0016] Furthermore, the liquid inlet interface is not lower than the reflux interface.

[0017] It is convenient for the heat exchange medium to flow to the return interface under the action of gravity after entering the protective jacket from the liquid inlet interface, thereby reducing the circulation resistance and promoting the natural circulation of the heat exchange medium.

[0018] Furthermore, the upper end of the liquid inlet pipe is fixed to the liquid inlet interface via a clamp or a thread; the upper end of the return pipe is fixed to the return interface via a clamp or a thread.

[0019] Improved stability and sealing.

[0020] Furthermore, an inner wall of the protective jacket is provided with an internal thread, and the speed sensor is provided with an external thread, and the internal thread of the protective jacket is connected to the external thread of the speed sensor.

[0021] It is easy to install and has good stability. It also prevents cold air from entering the gap between the protective jacket and the speed sensor, ensuring a constant temperature environment.

[0022] Furthermore, the heat exchange box is located in the heat dissipation area of the gear box of the wind turbine generator set.

[0023] The gearbox is an original device of the wind turbine generator set. The heat emitted by the gearbox is used to heat the heat exchange medium, without the need for a new heat source, thus saving costs.

[0024] Furthermore, the protective jacket includes an inner tube and an outer tube, the outer tube is sleeved on the inner tube; both ends of the inner tube are provided with outer flanging structures, and both ends of the outer tube are sealed and connected to the outer flanging structures.

[0025] It is easy to install. When the structure is damaged, the leaked heat exchange medium can flow down along the outer wall of the outer cylinder, while avoiding the heat exchange medium from leaking from the inner wall of the protective jacket when the structure is damaged, so as to protect the speed sensor from being eroded by the heat exchange medium.

[0026] Furthermore, both ends of the outer cylinder are welded to the outer flange structure.

[0027] Easy to install, strong structure and good sealing.

[0028] Furthermore, the heat exchange box is provided with a water outlet joint and a return joint, the lower end of the liquid inlet pipe is connected to the water outlet joint, and the lower end of the return pipe is connected to the return joint; one end of the return joint extends into the bottom of the heat exchange box.

[0029] The installation is convenient, and it is convenient to ensure that the liquid inlet at the lower end of the liquid inlet pipe is higher than the water outlet at the lower end of the return pipe, thereby promoting natural circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural diagram of the present utility model.

[0031] Figure 2 Schematic diagram of the structure of the protective jacket.

[0032] Figure 3 Schematic diagram of the cross section of the protective jacket.

[0033] In the accompanying drawings, the technical features represented by the reference numerals are as follows:

[0034] 1-Protective jacket; 2-Heat exchange box; 3-Liquid inlet pipe; 4-Return pipe; 5-Liquid inlet interface; 6-Return interface; 7-Internal thread; 8-External flange structure; 9-Speed sensor. DETAILED DESCRIPTION

[0035] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0036] This utility model refers to Figure 1-3 .

[0037] The utility model provides a power-free constant temperature device for a speed sensor of a wind turbine generator set, comprising a protective jacket 1, a heat exchange box 2, a liquid inlet pipe 3, and a return pipe 4. The inner side wall of the protective jacket 1 matches the outer shape of the speed sensor 9, and an annular cavity capable of accommodating a heat exchange medium is provided between the inner side wall and the outer side wall of the protective jacket 1; the upper end of the liquid inlet pipe 3 and the upper end of the return pipe 4 are respectively connected to the protective jacket 1 and communicate with the annular cavity of the protective jacket 1; the lower end of the liquid inlet pipe 3 and the lower end of the return pipe 4 are respectively connected to the heat exchange box 2, and the lower end of the liquid inlet pipe 3 is higher than the lower end of the return pipe 4.

[0038] principle:

[0039] During installation, the protective jacket 1 is higher than the heat exchange box 2. The protective jacket 1 is placed on the speed sensor 9 of the wind turbine generator set to play a role in heat preservation. The heat exchange box 2 is placed at the heat source of the wind turbine generator set. The heat source can be a gear box or other equipment provided by the wind turbine generator set. The wind turbine generator set, the heat source, etc. belong to the existing technology. The heat exchange box 2 and the protective jacket 1 are filled with heat exchange medium. The heat exchange medium can be water, air conditioning refrigerant, etc., and the medium whose density changes faster with temperature is preferred.

[0040] Note: Figure 1 It is a form of random display and does not represent the installed form.

[0041] During operation, if the ambient temperature is too low, the temperature difference between the inside and outside of the protective jacket 1 is large. At this time, the heat exchange medium in the heat exchange box 2 is affected by the heat source. The higher temperature heat exchange medium has a lower density and rises, thus rising along the liquid inlet pipe 3 until it enters the protective jacket 1. The heat exchange medium in the protective jacket 1 cools down and becomes more dense, so it flows back to the lower part of the heat exchange box 2 along the return pipe 4. Once it returns to the lower part of the heat exchange box 2, it is heated again, thus forming a natural circulation. The principle of this natural circulation is the same as that of rural earth heating.

[0042] With the present invention, the protective jacket 1 can be put on the speed sensor 9 of the wind turbine generator set to play a role in heat preservation; the heat exchange medium in the protective jacket 1 and the heat exchange box 2 is naturally circulated, and the heat of the heat source in the heat exchange box 2 is transferred to the protective jacket 1, thereby ensuring a constant temperature environment for the speed sensor 9; since the temperature of the heat exchange medium in the protective jacket 1 is always lower than the heat source temperature, and the natural circulation speed is slow, it is convenient to constrain the upper limit of the ambient temperature where the speed sensor 9 is located, avoiding overheating failure and having good safety; in addition, the present invention does not have circuit leads, thereby avoiding the risk of electrical leads.

[0043] Furthermore, the protective jacket 1 is cylindrical.

[0044] It is easy to make and helps to reduce costs.

[0045] Furthermore, a liquid inlet interface 5 and a reflux interface 6 are provided on the outer side wall of the protective jacket 1 . The liquid inlet interface 5 is connected to the upper end of the liquid inlet pipe 3 , and the reflux interface 6 is connected to the upper end of the reflux pipe 4 .

[0046] Can be disassembled and assembled repeatedly for easy maintenance.

[0047] Furthermore, the liquid inlet interface 5 is not lower than the reflux interface 6 .

[0048] It is convenient for the heat exchange medium to flow to the reflux interface 6 under the action of gravity after entering the protective jacket 1 from the liquid inlet interface 5, thereby reducing the circulation resistance and promoting the natural circulation of the heat exchange medium.

[0049] Furthermore, the upper end of the liquid inlet pipe 3 is fixed to the liquid inlet interface 5 through a clamp or a thread; the upper end of the return pipe 4 is fixed to the return interface 6 through a clamp or a thread.

[0050] Improved stability and sealing.

[0051] Furthermore, an internal thread 7 is provided on the inner side wall of the protective jacket 1 , and an external thread is provided on the speed sensor 9 . The internal thread 7 of the protective jacket 1 is connected to the external thread of the speed sensor 9 .

[0052] The installation is convenient and the stability is good. At the same time, the outside cold air is prevented from entering the gap between the protective jacket 1 and the speed sensor 9, thereby ensuring a constant temperature environment.

[0053] Furthermore, the heat exchange box 2 is located in the heat dissipation area of the gear box of the wind turbine generator set.

[0054] The gearbox is an original device of the wind turbine generator set. The heat emitted by the gearbox is used to heat the heat exchange medium, without the need for a new heat source, thus saving costs.

[0055] Furthermore, the protective jacket 1 includes an inner tube and an outer tube, and the outer tube is sleeved on the inner tube; both ends of the inner tube are provided with outer flanging structures 8, and both ends of the outer tube are sealed and connected to the outer flanging structures 8.

[0056] The installation is convenient. When the structure is damaged, the leaked heat exchange medium can flow down along the outer wall of the outer cylinder. At the same time, the heat exchange medium is prevented from leaking from the inner wall of the protective jacket 1 when the structure is damaged, thereby protecting the speed sensor 9 from being eroded by the heat exchange medium.

[0057] Furthermore, both ends of the outer cylinder are welded to the outer flange structure 8 .

[0058] Easy to install, strong structure and good sealing.

[0059] Furthermore, the heat exchange box 2 is provided with a water outlet joint and a return joint, the lower end of the liquid inlet pipe 3 is connected to the water outlet joint, and the lower end of the return pipe 4 is connected to the return joint; one end of the return joint extends into the bottom of the heat exchange box 2.

[0060] The installation is convenient, and it is convenient to ensure that the liquid inlet at the lower end of the liquid inlet pipe 3 is higher than the water outlet at the lower end of the return pipe 4, thereby promoting natural circulation.

[0061] In the description of the present invention, it should be understood that if there are descriptive terms indicating orientation, direction or positional relationship, such as: "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated in this specification is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of understanding the present invention and simplifying the description, and does not indicate or imply that the referred part, element or whole must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0062] In addition, if there are order description terms, such as "first", "second", etc., their use in this specification is to facilitate understanding or simplify the description. For example, in order to distinguish multiple technical features with the same type or function, but they have to be mentioned separately, this specification may use prefix or suffix order description terms to distinguish them. Therefore, it cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of such features. In the description of this utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0063] In the present invention, if terms describing the relative functional relationship of structures are used, such as "install", "connect", "connect", "fix", etc., they should be understood in a broad sense unless otherwise clearly specified and limited. For example, "install", "connect", "connect", etc. can be fixed connections, detachable connections, or integrated; can be mechanical connections or electrical connections; can be direct connections or indirect connections through an intermediate medium, can be internal connections between two elements or interactive relationships between two elements; "fix" can be fixed to form an integral body, or can be detachably fixed through fasteners; can be directly fixed or fixed through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above-mentioned descriptive terms in the present invention can be understood according to the specific circumstances, the context, the coherence of the preceding and following texts, etc.

[0064] In this utility model, if descriptive terms with ancillary or connecting meaning appear, for example, a first feature being "on" or "below" a second feature, these should not be interpreted as limiting unless otherwise expressly specified or limited. For example, "on" or "below" may refer to direct contact between the first and second features, or indirect contact between the first and second features through an intermediary. Those skilled in the art will understand the specific meanings of these descriptive terms in this utility model based on the specific circumstances, context, and coherence of the preceding and following texts.

[0065] Furthermore, when a first feature is “above,” “above,” or “above” a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is “below,” “below,” or “below” a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments, examples and features of different embodiments and examples described in this specification, unless there is any contradiction, and these combinations or combinations should all fall within the scope summarized by the present invention.

[0067] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are illustrative and cannot be understood as limiting the present invention. Changes, modifications, substitutions and variations of the above embodiments made by ordinary technicians in the field within the scope of information available from public channels and in combination with the technical inspiration given by the application documents are still within the scope of protection of the present application.

Claims

1. A wind turbine generator speed sensor temperature control device without power supply, characterized by: The invention comprises a protective jacket (1), a heat exchange box (2), a liquid inlet pipe (3), and a return pipe (4); the inner side wall of the protective jacket (1) matches the outer shape of the speed sensor (9); an annular cavity capable of accommodating a heat exchange medium is provided between the inner side wall and the outer side wall of the protective jacket (1); the upper end of the liquid inlet pipe (3) and the upper end of the return pipe (4) are respectively connected to the protective jacket (1) and communicate with the annular cavity of the protective jacket (1); the lower end of the liquid inlet pipe (3) and the lower end of the return pipe (4) are respectively connected to the heat exchange box (2), and the lower end of the liquid inlet pipe (3) is higher than the lower end of the return pipe (4).

2. The power-free constant temperature device for a wind turbine generator speed sensor according to claim 1, characterized in that: The protective jacket (1) is cylindrical.

3. The power-free constant temperature device for a wind turbine generator speed sensor according to claim 2, characterized in that: A liquid inlet interface (5) and a reflux interface (6) are provided on the outer wall of the protective jacket (1); the liquid inlet interface (5) is connected to the upper end of the liquid inlet pipe (3), and the reflux interface (6) is connected to the upper end of the reflux pipe (4).

4. The power-free constant temperature device for a wind turbine generator speed sensor according to claim 3, characterized in that: The liquid inlet interface (5) is not lower than the reflux interface (6).

5. The power-free constant temperature device for a wind turbine generator speed sensor according to claim 3, characterized in that: The upper end of the liquid inlet pipe (3) is fixed to the liquid inlet interface (5) via a clamp or a thread; the upper end of the return pipe (4) is fixed to the return interface (6) via a clamp or a thread.

6. The power-free constant temperature device for a wind turbine generator speed sensor according to claim 2, characterized in that: An internal thread (7) is provided on the inner side wall of the protective jacket (1), and an external thread is provided on the rotation speed sensor (9). The internal thread (7) of the protective jacket (1) is connected to the external thread of the rotation speed sensor (9).

7. The power-free constant temperature device for a wind turbine generator speed sensor according to claim 1, characterized in that: The heat exchange box (2) is located in the gear box heat dissipation area of the wind turbine generator set.

8. The power-free constant temperature device for a wind turbine generator speed sensor according to claim 1, characterized in that: The protective jacket (1) comprises an inner tube and an outer tube, wherein the outer tube is sleeved on the inner tube; both ends of the inner tube are provided with outer flange structures (8), and both ends of the outer tube are sealedly connected to the outer flange structures (8).

9. The power-free constant temperature device for a wind turbine generator speed sensor according to claim 8, characterized in that: Both ends of the outer cylinder are welded to the outer flange structure (8).

10. The power-free constant temperature device for a wind turbine generator speed sensor according to claim 1, characterized in that: The heat exchange box (2) is provided with a water outlet joint and a return joint, the lower end of the liquid inlet pipe (3) is connected to the water outlet joint, and the lower end of the return pipe (4) is connected to the return joint; one end of the return joint extends into the bottom of the heat exchange box (2).

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