Cooler assembly, lubricating system and wind generating set

Abstract

The utility model provides a cooler assembly, a lubricating system and a wind generating set, the cooler assembly is suitable for the lubricating system, the lubricating system is connected with a gearbox, the cooler assembly comprises a cooler body and a control valve assembly, and the cooler body is provided with an air inlet; the control valve assembly is arranged at the air inlet, when the lubricating system stops running, the control valve assembly is conducted, so that the cooler body is communicated with the outside atmosphere through the air inlet, due to the fact that the control valve assembly can be conducted when the unit stops, no lubricating oil is reserved in the cooler body, and when the unit is started again, the control valve assembly can be switched on, so that the cooling effect is improved. The cooler body can be conducted in a low-temperature environment, normal operation of a unit is guaranteed, and the service life of the internal structure of the gearbox and the service life of sealing pieces are prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind power generation, and in particular relates to a cooler assembly, a lubrication system and a wind power generator set. Background Art

[0002] Wind power generation is a green energy source that has attracted much attention. The gearbox is a key component of a wind turbine generator set. In order to increase the service life of the gearbox, gearbox lubrication is an indispensable component. The lubrication system satisfies the lubrication and cooling of the gearbox, wherein cooling is to neutralize the heat generated during the operation of the gearbox. However, the lubrication system may include a cooler. When the unit is running, the cooler is filled with lubricating oil to cool the lubricating oil. The internal structure space of the cooler is small. When the unit is shut down, lubricating oil is easily retained inside the cooler; when the outside temperature is low, the lubricating oil retained in the cooler will solidify. When the unit is started again, the lubricating oil in the cooler in a solidified state will block the lubricating oil circuit, thereby causing the cooler to fail to work properly, and the gearbox cannot be lubricated and cooled, which eventually causes the gearbox lubricating oil temperature to be too high and the unit to shut down due to a fault, seriously affecting the normal operation of the unit. Utility Model Content

[0003] One of the main purposes of the present disclosure is to provide a cooler assembly, a lubrication system and a wind turbine generator set, so as to avoid lubrication oil remaining in the cooler and causing solidification, thereby improving the reliability of the lubrication system.

[0004] In view of the above objectives, the present disclosure provides the following technical solutions:

[0005] In one aspect of the present disclosure, a cooler assembly is provided, which is applicable to a lubrication system, wherein the lubrication system is connected to a gear box, and the cooler assembly comprises a cooler body and a control valve assembly, wherein the cooler body is provided with an air inlet; the control valve assembly is arranged at the air inlet, and when the lubrication system stops running, the control valve assembly is turned on, so that the cooler body is connected to the outside atmosphere through the air inlet.

[0006] According to an exemplary embodiment of the present disclosure, the control valve assembly includes a valve body and a control module, the outlet of the valve body is in communication with the air inlet, and the control module is capable of controlling the valve body to open.

[0007] Optionally, the control valve assembly further includes an air filter, and the air filter is arranged at the inlet of the valve body.

[0008] Specifically, the control valve assembly further includes a cover body, the cover body is arranged outside the air filter and the valve body, and the cover body is provided with a cover body vent hole.

[0009] Furthermore, the control valve assembly also includes a pressure sensor, which can monitor the oil inlet pressure of the gear box, and the control module can control the opening of the valve body according to the monitoring value of the pressure sensor.

[0010] According to another exemplary embodiment of the present disclosure, the valve body is an electric ball valve; and / or the air inlet is arranged on the top wall of the cooler body.

[0011] On the other hand, the present disclosure provides a lubrication system suitable for a wind turbine generator set, wherein the lubrication system is connected to a gearbox, and the lubrication system comprises a drive unit and a cooler assembly, wherein the drive unit drives the lubricating oil in the lubrication system to form an oil supply and return path; a first lubrication oil circuit is arranged between the drive unit and the oil outlet of the gearbox, and the cooler assembly is arranged on the first lubrication oil circuit.

[0012] An exemplary embodiment of the present disclosure is that the gearbox has an inner cavity, the gearbox includes a lubrication channel capable of connecting the inner cavity and the first lubrication oil circuit, the lubrication channel is provided with an oil outlet connected to the inner cavity, the lubrication channel includes a first channel...an Nth channel that are connected in sequence and have diameters that decrease in sequence, the first channel is connected to the first lubrication oil circuit, the oil outlet is provided in the Nth channel, wherein the length of the Nth channel is L, the radius of the Nth channel is R, and L / R≥200 is satisfied, and N is a natural number greater than 2.

[0013] According to an exemplary embodiment of the present disclosure, the lubrication system further includes a temperature control valve and a second lubricating oil circuit, the inlet of the temperature control valve is connected to the oil outlet of the gear box, the first oil outlet of the temperature control valve is connected to the first lubricating oil circuit, the second oil outlet of the temperature control valve is connected to the inlet of the second lubricating oil circuit, the outlet of the second lubricating oil circuit is connected to the oil outlet of the cooler assembly, and the temperature control valve is configured such that: when the lubricating oil temperature is less than a first predetermined value, the first oil outlet is blocked; when the lubricating oil temperature is greater than the first predetermined value, the first oil outlet is opened.

[0014] In another aspect of the present disclosure, a wind turbine generator set is provided, wherein the wind turbine generator set comprises the lubrication system as described above.

[0015] According to another exemplary embodiment of the present disclosure, the wind turbine generator set comprises a medium-speed permanent magnet generator set or a doubly-fed wind turbine generator set.

[0016] The cooler assembly, lubrication system and wind turbine generator set provided by the present disclosure have at least the following beneficial effects: the cooler assembly provided in this embodiment, since the control valve assembly can be turned on when the unit is shut down, so that no lubricating oil is retained in the cooler body, when the unit is started again, the cooler body can be turned on in a low temperature environment, ensuring the normal operation of the unit and improving the service life of the internal structure of the gear box and the sealing components. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or other objects and advantages of the present disclosure will become more apparent through the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0018] Figure 1 A schematic structural diagram of a lubrication system provided by an exemplary embodiment of the present disclosure.

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of the cooler assembly.

[0020] Figure 3 Schematic diagram of the internal lubrication channel of a gear box according to an embodiment of the present disclosure.

[0021] Description of reference numerals:

[0022] 1. Drive unit; 2. Gear box;

[0023] 3. Temperature control valve; 4. Cooler assembly;

[0024] 6. The first lubricating oil circuit;

[0025] 7. Second lubricating oil circuit; 21. Oil inlet;

[0026] 22. Oil outlet; 23. First channel;

[0027] 24. Second channel; 25. Fourth channel;

[0028] 41. Cooler body;

[0029] 42. Control valve assembly; 421. Valve body;

[0030] 422. Air filter; 423. Cover body. DETAILED DESCRIPTION

[0031] Example embodiments will now be described more fully with reference to the accompanying drawings. However, it should not be understood that the implementation of the present disclosure is limited to the embodiments set forth herein. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0032] The gearbox 2 is an important transmission component of the wind turbine generator set. In order to ensure the stable operation of the gearbox 2, the wind turbine generator set also includes a lubrication system for providing lubricating oil to the gearbox 2 and / or cooling the operating parts of the gearbox 2. The lubrication system includes a cooler, which is a key component during the normal operation of the gearbox 2 and is usually installed on the top of the nacelle to facilitate heat dissipation.

[0033] The lubrication channels in the gearbox 2 are complicated, and some of them are narrow and long with bends. Therefore, when the unit is shut down, part of the lubricating oil in the cooler will flow back to the gearbox 2 under the action of gravity. After part of the lubricating oil flows back to the gearbox 2, negative pressure will be generated in the cooler, which will result in the lubricating oil in the cooler not being able to flow back to the gearbox 2. In the cold winter, for example but not limited to, when the ambient temperature is below -20°, the lubricating oil in the cooler will become semi-solid, thus blocking the oil circuit of the cooler. When the unit is started again, the cooler cannot operate normally because the lubricating oil solidified at low temperature blocks the oil circuit, which leads to cooler failure, and finally the lubricating oil temperature in the gearbox 2 is too high, causing a fault shutdown, which seriously affects the normal operation of the unit.

[0034] The gear box 2 has an inner cavity, and the gear set is rotatably disposed in the gear box 2, but the invention is not limited thereto. In order to facilitate lubrication of the parts to be lubricated in the gear box 2, the gear box 2 includes a lubrication channel, and the arrangement of the lubrication channel is as follows: Figure 3 As shown, the lubrication channel can connect the oil source and the inner cavity of the gear box 2 to guide the lubricating oil in the oil source to the inner cavity and lubricate the parts to be lubricated. The lubrication channel is provided with an oil outlet 22, and the oil outlet 22 is close to the parts to be lubricated, for example but not limited to, the parts to be lubricated are gears or bearings, and the lubricating oil flowing out of the oil outlet 22 can fall on the parts to be lubricated, and then be used to lubricate the parts to be lubricated. In this embodiment, different gear boxes 2 have different lubrication methods, for example but not limited to, the lubricating oil flowing out of the oil outlet can be sprayed or dripped on the parts to be lubricated, which is not too limited here.

[0035] In this embodiment, the lubrication channel of the gear box 2 includes a first channel...an Nth channel which are connected in sequence and have decreasing diameters in sequence, that is, the diameter of the first channel 23 is greater than the diameter of the second channel 24, the diameter of the second channel 24 is greater than the diameter of the third channel, the diameter of the third channel is greater than the diameter of the fourth channel 25..., wherein the first channel 23 is connected to the oil source, and the oil outlet 22 is arranged in the Nth channel.

[0036] Continue to refer to Figure 3The oil inlet of the lubrication channel of the gearbox 2 is located in the upper left corner of the figure (shown by the dotted line). The first channel 23 can be a main oil circuit, and then branched into multiple branches. At the end of each branch, the oil outlet 22 is shown as an example, wherein the Nth channel can be the second channel 24, for example but not limited to, Figure 3 The Nth channel can also be the fourth channel 25, for example Figure 3 The two branches extending downward on the left side, but not limited to this. The Nth channel can also be the fifth channel, or the sixth channel, etc., which can be selected according to actual needs.

[0037] The lubricating oil in the oil source can enter the lubrication channel through the oil inlet 21, flow to the Nth channel through the first channel 23, and leave the lubrication channel through the oil outlet 22 and enter the inner cavity of the gearbox 2 to provide lubrication for the components to be lubricated.

[0038] As an example, the length of the Nth channel is L, and the radius of the Nth channel is R, which satisfies L / R ≥ 200, and N is a natural number greater than 2. This configuration makes the Nth channel form a long and narrow channel, and the lubricating oil is easy to adhere to the channel wall of the Nth channel. After the unit is shut down, part of the lubricating oil in the cooler can flow back to the gear box 2. When part of the lubricating oil flows back, negative pressure is easy to be generated in the cooler. The oil droplets in the long and narrow channel are subject to the upward negative pressure suction, the adsorption force of the long and narrow channel, and the downward gravity. Since the oil droplets are small, the oil droplets are easy to be balanced in the Nth channel and stay in the Nth channel. When the outside temperature is low, for example, when the ambient temperature is below -20°, the oil droplets solidify and block the Nth channel, which causes the lubrication channel in the cooler to be blocked. When the unit is started again, the lubricating oil in the gear box 2 cannot smoothly enter the cooler, resulting in cooler failure.

[0039] In this embodiment, the lubrication channel may be a plurality of channels connected by grooves in the housing wall of the gear box 2, or may be an external tube body on the housing wall to form a lubrication channel, both of which are within the protection scope of the present disclosure.

[0040] Reference Figure 1 and Figure 2 The present disclosure provides a cooler assembly 4, which is suitable for a lubrication system, and the lubrication system is connected to a gear box 2. The cooler assembly 4 includes a cooler body 41 and a control valve assembly 42. The cooler body 41 is provided with an air inlet; the control valve assembly 42 is provided at the air inlet. When the lubrication system stops running, the control valve assembly 42 is turned on, so that the cooler body 41 is connected to the outside atmosphere through the air inlet. In this embodiment, the cooler assembly 4 is provided above the gear box 2, but it is not limited thereto.

[0041] During normal operation of the wind turbine generator set, the cooler body 41 can integrate the heat generated by the gear box 2 to keep the lubricating oil in the gear box 2 within an appropriate temperature range, so that the cooler body 41 can provide good cooling for the gear box 2 .

[0042] In this embodiment, the cooler assembly 4 is disposed above the gear box 2. For example but not limited to, the cooler assembly 4 is disposed on the top of the nacelle, but not limited thereto.

[0043] The cooler assembly 4 provided in this embodiment includes a cooler body 41 and a control valve assembly 42. The control valve assembly 42 is installed at the air inlet of the cooler body 41. When the wind turbine generator set is shut down, the control valve assembly 42 is adjusted to a conducting state so that the cooler body 41 can be connected to the outside through the air inlet. At this time, negative pressure is no longer generated in the cooler body 41, and the oil droplets in the elongated channel will no longer be subject to the upward negative pressure suction force. The lubricating oil will flow downward into the gear box 2 under the action of gravity, so that there is no lubricating oil remaining in the cooler body 41. When the wind turbine generator set is restarted, the lubricating oil can smoothly pass through the cooler assembly 4. It can be understood that the cooler assembly 4 provided in this embodiment, because the control valve assembly 42 can be turned on when the unit is shut down, so that there is no lubricating oil remaining in the cooler body 41, the lubrication channel of the cooler body 41 is avoided from being blocked in a low temperature environment. When the unit is restarted, the cooler body 41 can be turned on in a low temperature environment, ensuring the normal operation of the unit and improving the service life of the internal structure and seals of the gear box 2.

[0044] As an example, in this embodiment, the wind turbine generator set includes a tower, a nacelle installed on the top of the tower, and an impeller and a generator connected to the nacelle. The impeller is connected to the generator through a main shaft, and the rotation of the impeller drives the generator to generate electricity. A cooler assembly 4 is arranged on the top of the nacelle, and the cooler assembly 4 includes a cooler body 41 and a control valve assembly 42. An air inlet is arranged on the top of the cooler body 41, and the control valve assembly 42 is arranged at the air inlet to adjust the control valve assembly 42 to be turned on or off as needed.

[0045] The control valve assembly 42 is set to be in a closed state in normal operation. When the wind turbine generator set operates normally, the control valve assembly 42 remains in a closed state to prevent the lubricating oil from leaking out of the cooler body 41 through the air inlet, and also prevents foreign matter from entering the cooler body 41 through the air inlet, thereby improving the reliability of the cooler assembly 4.

[0046] When the wind turbine generator set is shut down, the control valve assembly 42 is adjusted to the open state. At this time, the cooler body 41 is connected to the outside through the air inlet. Under the action of gravity, the lubricating oil in the cooler body 41 flows smoothly into the gear box 2, avoiding the retention of lubricating oil in the cooler body 41, thereby avoiding the blockage of the lubrication cooling channel due to the condensation of lubricating oil in the cooler body 41.

[0047] As an example, in this embodiment, the air inlet is arranged on the top wall of the cooler body 41, so as to avoid accidental leakage of the lubricating oil in the cooler body 41 through the air inlet, further improving the reliability of the cooler assembly 4, but not limited to this.

[0048] Further, in order to improve the convenience of the cooler assembly 4, the control valve assembly 42 includes a valve body 421 and a control module, and the valve body 421 is arranged at the air inlet. Specifically, the outlet of the valve body 421 is connected to the air inlet, and the control module can remotely control the valve body 421 to open, so as to facilitate the operator on land to control the valve body 421 on the cabin, thereby realizing the opening or closing of the valve body 421.

[0049] As an example, the valve body 421 and the control module can be remotely controlled, for example but not limited to, the transmission between the valve body 421 and the control module can be wired or wireless, all of which are within the protection scope of the present disclosure and will not be described in detail here.

[0050] As an example, the valve body 421 in this embodiment is an electric ball valve, but the present invention is not limited thereto.

[0051] In order to further improve the reliability of the cooler assembly 4, the control valve assembly 42 also includes a pressure sensor (not shown), which can monitor the oil inlet pressure of the gearbox 2. The control module can control the valve body 421 to open according to the monitoring value of the pressure sensor.

[0052] As an example, when the unit is shut down, the lubrication system stops running, and the pressure sensor monitors the oil inlet pressure of the gearbox 2 in real time. When the oil inlet pressure is a predetermined value, for example but not limited to, the control module receives the pressure value of the pressure sensor and controls the valve body 421 to open. At this time, the cooler body 41 is connected to the atmosphere, and the lubricating oil in the cooler body 41 will flow back to the gearbox 2 under the action of gravity, thus solving the problem of vacuum inside the cooler. Optionally, the predetermined value can be 0, but is not limited thereto.

[0053] Continue to refer to Figure 2In this embodiment, the control valve assembly 42 also includes an air filter 422, which is arranged at the inlet of the valve body 421. When the control valve assembly 42 is in a conducting state, the air filter 422 can filter particulate matter or moisture in the air to prevent particulate matter or moisture from entering the lubricating oil and affecting the cleanliness of the lubricating oil, thereby improving the service life of the cooler assembly 4, but not limited to this.

[0054] Continuing to refer to the accompanying drawings, the control valve assembly 42 also includes a cover 423, which is arranged outside the air filter 422 and the valve body 421, and the cover 423 is provided with a cover vent. The function of the cover 423 is to protect the valve body 421 and the air filter 422, and to prevent the valve body 421 or the air filter 422 from being damaged due to collisions during the hoisting process of the control valve assembly 42. In addition, by providing the cover 423, the valve body 421 and the air filter 422 can be prevented from being exposed to sunlight and sandstorms for a long time, thereby increasing the service life of the control valve assembly 42, but the present invention is not limited thereto.

[0055] Continue to refer to Figure 1 On the other hand, the present disclosure provides a lubrication system suitable for a wind turbine generator set, wherein the lubrication system is connected to a gearbox 2, and the lubrication system includes a drive unit 1 and a cooler assembly 4, wherein the drive unit 1 is used to drive the lubricating oil in the lubrication system to form an oil supply and return path. A first lubricating oil circuit 6 is provided between the drive unit 1 and the oil outlet of the gearbox 2, and the cooler assembly 4 is provided on the first lubricating oil circuit 6, and the cooler assembly 4 can be used to cool the lubricating oil passing through the first lubricating oil circuit 6. Under the action of the drive unit 1, the lubricating oil in the oil tank can enter the lubrication channel of the gearbox 2 through the oil inlet 21, and after contacting the gears or bearings in the gearbox 2, leave the gearbox 2 through the oil outlet 22 of the gearbox 2, and enter the cooler assembly 4 through the first lubricating oil circuit 6 for cooling.

[0056] The present disclosure arranges a cooler assembly 4 on the first lubricating oil circuit 6 of the lubricating system, so that the cooler assembly 4 can cool the lubricating oil passing through the first lubricating oil circuit 6, thereby keeping the lubricating oil in the gear box 2 within a suitable temperature range, allowing the wind turbine to operate normally and improving the operating reliability of the wind turbine, but is not limited to this.

[0057] The drive unit 1 can be used to drive the lubricating oil in the lubrication system to form a flow path for lubricating the gear box 2. The drive unit 1 may include an accumulator (not shown), and the drive unit 1 may also include auxiliary components such as a hydraulic pump. For example, but not limited to, in this embodiment, the lubricating oil in the oil tank is driven by the hydraulic pump to flow into the accumulator, but not limited to this. The drive unit 1 is used as a power source for the lubrication system, but not limited to this.

[0058] Continuing to refer to the attached drawings, in order to further improve the reliability of the lubrication system, the lubrication system also includes a temperature control valve 3 and a second lubrication oil circuit 7, the inlet of the temperature control valve 3 is connected to the oil outlet 22 of the gear box 2, the first oil outlet of the temperature control valve 3 is connected to the first lubrication oil circuit 6, and the second oil outlet of the temperature control valve 3 is connected to the second lubrication oil circuit 7. The temperature control valve 3 is set to: when the lubrication oil temperature is less than the first predetermined value, the first oil outlet is blocked, and the lubrication oil leaving the gear box 2 can enter the gear box 2 again after passing through the second lubrication oil circuit 7, without entering the cooler assembly 4 for cooling, which is beneficial to the rapid heating of the lubrication oil at the initial start of the unit, thereby improving the fluidity of the lubrication oil. When the lubrication oil temperature is greater than the first predetermined value, the first oil outlet is opened, and the lubrication oil leaving the gear box 2 can enter the cooler assembly 4 for cooling, which is beneficial to keeping the lubrication oil in an appropriate temperature range.

[0059] It can be understood that the temperature control valve 3 is provided with a first oil outlet and a second oil outlet, the first lubricating oil circuit 6 is connected to the first oil outlet and a cooler assembly 4 is provided on the first lubricating oil circuit 6, and the first lubricating oil circuit 6 can be used to allow high-temperature lubricating oil to flow through to cool the high-temperature lubricating oil. The second lubricating oil circuit 7 is connected to the second oil outlet, and the second lubricating oil circuit 7 is provided in parallel with the first lubricating oil circuit 6, and the second lubricating oil circuit 7 can allow low-temperature lubricating oil to flow through.

[0060] As an example, when the wind turbine generator set is initially started, since the gearbox 2 has just started running, not much heat is generated, especially when the ambient temperature is low, for example but not limited to, when the ambient temperature is below -20°C, the ambient temperature is less than the first predetermined value, and the heat generated by the gearbox 2 can be used to heat the lubricating oil so that the lubricating oil can quickly improve its fluidity. At this time, the second oil outlet of the temperature control valve 3 is connected and the first oil outlet is blocked, so that all the lubricating oil can flow into the second lubricating oil circuit 7 through the second oil outlet.

[0061] Furthermore, when the lubricating oil temperature is greater than a first predetermined value, the first oil outlet is opened, and at least part of the lubricating oil can enter the cooler assembly 4 through the first lubricating oil passage 6 for heat dissipation, which helps the lubricating oil to remain within an appropriate temperature range.

[0062] As time goes by, the heat generated during the operation of the gearbox 2 gradually increases. When the temperature of the lubricating oil reaches the second predetermined value, the first predetermined value is less than the second predetermined value. At this time, the first oil outlet of the temperature control valve 3 is connected and the second oil outlet is blocked, so that all the lubricating oil can enter the first lubricating oil circuit 6 through the first oil outlet and be cooled by the cooler assembly 4, so that the lubricating oil is kept within a suitable temperature range, avoiding the failure of the unit due to excessively high lubricating oil temperature, thereby improving the reliability of the operation of the wind turbine.

[0063] It can be understood that when the lubricating oil temperature is between the first predetermined value and the second predetermined value, the first oil outlet and the second oil outlet are both connected, and the lubricating oil can pass through the first lubricating oil passage 6 and the second lubricating oil passage 7.

[0064] As an example, the first predetermined value may be 40° C. to 50° C., and the second predetermined value may be 70° C. to 80° C., but the present invention is not limited thereto. This embodiment is described by taking the first predetermined value as 45° C. and the second predetermined value as 75° C. as an example.

[0065] When the temperature of the lubricating oil is less than 45°C, for example but not limited to, when the temperature of the lubricating oil is -20°C, the fluidity of the lubricating oil is insufficient, and the heat generated by the gearbox 2 is conducive to the heating of the lubricating oil, thereby improving the fluidity of the lubricating oil. Therefore, when the lubricating oil is less than 45°C, there is no need to cool it, and the lubricating oil can enter the gearbox 2 through the second lubricating oil path 7. As the wind turbine generator set operates, the heat generated by the gearbox 2 gradually increases. When the temperature of the lubricating oil is greater than 45°C, the first oil outlet of the temperature control valve 3 is connected, and at least part of the lubricating oil can enter the cooler assembly 4 through the first lubricating oil path 6 for cooling. When the temperature of the lubricating oil is greater than 75°C, in order to avoid component failure of the wind turbine generator set, the lubricating oil needs to be cooled quickly to prevent the lubricating oil from continuing to heat up, so that the lubricating oil is kept within a suitable temperature range. At this time, the second oil outlet is blocked, and the lubricating oil is cooled through the first lubricating oil path 6 to achieve rapid cooling, but this is not limited to this.

[0066] The present disclosure improves the versatility of the lubrication system by providing a temperature control valve 3 and a first lubrication oil circuit 6 and a second lubrication oil circuit 6 provided in parallel on the temperature control valve 3, so that the lubrication system can adapt to a wider temperature range, but is not limited thereto.

[0067] In another aspect of the present disclosure, a wind turbine generator set is provided, the wind turbine generator set comprising the above lubrication system, wherein the lubrication system can lubricate components such as gears, thereby improving the operational reliability of the wind turbine generator set.

[0068] As an example, the wind turbine generator set provided in the present disclosure includes a medium-speed permanent magnet generator set or a doubly-fed wind turbine generator set.

[0069] The present disclosure provides a cooler assembly 4, thereby achieving a low-temperature opening effect of the cooler, avoiding blockage of the cooler due to solidification of lubricating oil in a low-temperature environment, ensuring the normal operation of the wind turbine gearbox 2, and thus improving the operating reliability of the wind turbine.

[0070] In the description of the present disclosure, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0071] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0072] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" 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, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0073] The features, structures or characteristics described in the present disclosure may be combined in one or more embodiments in any suitable manner. In the above description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, materials, etc. may be adopted. In other cases, known structures, materials or operations are not shown or described in detail to avoid blurring the various aspects of the present disclosure.

Claims

1. A cooler assembly, It is characterized in that Suitable for a lubrication system, the lubrication system is connected to a gear box (2), the cooler assembly (4) comprising: A cooler body (41), wherein the cooler body (41) is provided with an air inlet; A control valve assembly (42) is arranged at the air inlet. When the lubrication system stops running, the control valve assembly (42) is turned on, so that the cooler body (41) is connected to the outside atmosphere through the air inlet.

2. The cooler assembly according to claim 1, It is characterized in that The control valve assembly (42) comprises a valve body (421) and a control module. The outlet of the valve body (421) is in communication with the air inlet, and the control module is capable of controlling the valve body (421) to open.

3. The cooler assembly according to claim 2, It is characterized in that The control valve assembly (42) further comprises an air filter (422), wherein the air filter (422) is arranged at the inlet of the valve body (421).

4. The cooler assembly according to claim 2, It is characterized in that The control valve assembly (42) further comprises a pressure sensor, which is capable of monitoring the pressure of the oil inlet (21) of the gear box (2), and the control module is capable of controlling the valve body (421) to open according to the monitoring value of the pressure sensor.

5. The cooler assembly according to any one of claims 2 to 4, It is characterized in that The valve body (421) is an electric ball valve; and / or, The air inlet is arranged on the top wall of the cooler body (41).

6. A lubrication system, It is characterized in that Applicable to a wind turbine generator set, the lubrication system is connected to a gear box (2), and the lubrication system comprises: A drive unit (1) drives the lubricating oil in the lubricating system to form an oil supply and return path; The cooler assembly (4) according to any one of claims 1 to 5, wherein a first lubricating oil circuit (6) is provided between the drive unit (1) and the oil outlet (22) of the gear box (2), and the cooler assembly (4) is provided on the first lubricating oil circuit (6).

7. The lubrication system according to claim 6, It is characterized in that The gearbox (2) has an inner cavity, the gearbox (2) includes a lubrication channel capable of connecting the inner cavity and the first lubrication oil circuit, the lubrication channel is provided with an oil outlet (22) connected to the inner cavity, the lubrication channel includes a first channel (23) ... an Nth channel which are connected in sequence and have diameters that decrease in sequence, the first channel (23) is connected to the first lubrication oil circuit (6), the oil outlet (22) is provided in the Nth channel, wherein the length of the Nth channel is L, the radius of the Nth channel is R, and L / R ≥ 200, and N is a natural number greater than 2.

8. The lubrication system according to claim 7, It is characterized in that The lubrication system further comprises a temperature control valve (3) and a second lubricating oil circuit (7); the inlet of the temperature control valve (3) is connected to the oil outlet of the gear box (2); the first oil outlet of the temperature control valve (3) is connected to the first lubricating oil circuit (6); the second oil outlet of the temperature control valve (3) is connected to the inlet of the second lubricating oil circuit (7); the outlet of the second lubricating oil circuit (7) is connected to the oil outlet (22) of the cooler assembly (4); the temperature control valve (3) is configured such that: when the lubricating oil temperature is less than a first predetermined value, the first oil outlet is blocked; when the lubricating oil temperature is greater than the first predetermined value, the first oil outlet is opened.

9. A wind turbine generator set, It is characterized in that The wind turbine generator set comprises a lubrication system according to any one of claims 6-8.

10. The wind turbine generator set according to claim 9, It is characterized in that The wind turbine generator set includes a medium-speed permanent magnet generator set or a double-fed wind turbine generator set.

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