Lubricating system

Abstract

The invention relates to a lubricating system which comprises a liquid storage part used for containing lubricating liquid; the lubricating part is provided with a liquid outlet, and at least part of the liquid outlet is arranged close to the top end of the bearing in the vertical direction; the power module comprises a lubricating pump and a power takeoff which are connected with each other, the lubricating pump is connected between the liquid storage part and the lubricating part, and the power takeoff can drive the lubricating pump to operate. According to the lubricating system, the transmission system can be lubricated in the transportation process, a power source does not need to be additionally arranged, and the lubricating system is low in cost and wide in application range.

Description

Technical Field

[0001] The present application relates to the technical field of wind power generation, and in particular to a lubrication system. Background Art

[0002] The transmission system of an existing wind turbine generator set usually includes one or more structures such as a main shaft, a bearing, a bearing seat, and a gear box, wherein the main shaft is usually inserted into the bearing and is rotatably connected to the bearing seat through the bearing. On this basis, in order to facilitate assembly operations, wind turbine generator sets are usually assembled in factories, connected to each other to form the main body of the transmission system, and then transported to the location where the wind turbine generator set is to be installed by a carrier. During transportation, the lubrication system that is set in conjunction with the transmission system usually lacks a power source and is difficult to operate, resulting in the transmission system being easily damaged during transportation and reduced reliability.

[0003] Therefore, there is an urgent need for a lubrication system that can be used during transportation and has a wide range of applications. Summary of the invention

[0004] An embodiment of the present application provides a lubrication system that can be used during transportation and does not require an additional power source. The lubrication system has low cost and a wide range of applications.

[0005] In the first aspect, according to an embodiment of the present application, a lubrication system is proposed and applied to a transmission system. The transmission system includes a bearing, including: a liquid storage portion for holding a lubricating liquid; a lubrication portion, which is provided with a liquid outlet, and in the vertical direction, at least part of the liquid outlet is arranged near the top of the bearing; a power module, including a lubrication pump and a power take-off connected to each other, the lubrication pump is connected between the liquid storage portion and the lubrication portion, and the power take-off can drive the lubrication pump to operate.

[0006] According to one aspect of the embodiment of the present application, the power module further includes a manual hydraulic pump connected between the liquid storage part and the lubrication part.

[0007] According to one aspect of an embodiment of the present application, the lubrication part includes a distributor, which is detachably connected to the liquid outlet and is provided with a plurality of sub-liquid outlets. In the vertical direction, the plurality of sub-liquid outlets are respectively arranged at the top end of the bearing and at the two opposite ends of the bearing in its own radial direction.

[0008] According to one aspect of the embodiments of the present application, each distributor includes three sub-liquid outlets, which are respectively arranged at the top end of the bearing in the vertical direction and at two opposite ends of the bearing in the horizontal direction.

[0009] According to one aspect of the embodiment of the present application, the lubrication part further includes a plunger sensor, which is disposed at the sub-liquid outlet and corresponds one-to-one with the sub-liquid outlet.

[0010] According to one aspect of an embodiment of the present application, the lubrication system further includes a liquid return pipeline, one end of which is connected between the lubrication pump and the lubrication part, and the other end is connected to the liquid storage part, and the liquid return pipeline is provided with a first reversing valve.

[0011] According to one aspect of an embodiment of the present application, the lubrication system further includes an automatic control module, which includes a liquid level detector and a controller. The liquid level detector is disposed in the bearing, and the controller is communicatively connected to the liquid level detector and the first reversing valve.

[0012] According to one aspect of an embodiment of the present application, the controller is configured to receive a liquid level height signal collected by a liquid level detector. When the liquid level height signal is lower than a preset value, the first reversing valve is controlled to disconnect the return liquid pipeline; when the liquid level height signal is higher than the preset value, the first reversing valve is controlled to open the return liquid pipeline.

[0013] According to one aspect of an embodiment of the present application, the lubrication system also includes a filtering module, which includes a liquid suction filter and a liquid return filter. The liquid suction filter is arranged between the lubrication pump and the liquid storage part, and the liquid return filter is arranged between the first reversing valve and the liquid storage part.

[0014] According to one aspect of an embodiment of the present application, the lubrication system further includes a throttle valve connected between the lubrication pump and the lubrication part.

[0015] According to one aspect of an embodiment of the present application, the bearing includes a first bearing and a second bearing, and the lubrication part includes a first liquid outlet and a second liquid outlet respectively arranged corresponding to the first bearing and the second bearing; the lubrication system also includes a second reversing valve, one end of the second reversing valve is connected between the first liquid outlet and the second liquid outlet, and the other end is connected to the liquid storage part.

[0016] The lubrication system provided in the embodiment of the present application includes a liquid storage portion for storing lubricating liquid, a lubrication portion for conveying the lubricating liquid to the bearing to be lubricated, and a power module for driving the flow of the lubricating liquid and providing power therefor, wherein the power module includes a mechanical lubrication pump and a power take-off. During the transportation of the transmission system, the input end of the power take-off can be directly or indirectly connected to the engine of the vehicle, and the mechanical lubrication pump is driven to operate by the engine of the vehicle to pump the lubricating liquid in the liquid storage portion into the bearing to be lubricated. The structure is simple and reliable, and it can provide lubrication for the transmission system in transportation without adding an additional power source. It has a wide range of applications and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0018] Figure 1 is a structural schematic diagram of a lubrication system provided by an embodiment of the present application;

[0019] Figure 2 It is a structural schematic diagram of a lubrication system provided in another embodiment of the present application.

[0020] in:

[0021] 100-lubrication system; 200-bearing;

[0022] 10-liquid storage unit; 20-lubricating unit; 30-power module; 40-liquid return line; 50-automatic control module; 60-filter module; 70-throttle valve; 80-first bearing; 90-second bearing;

[0023] 21-liquid outlet; 22-distributor; 23-plunger sensor; 24-second reversing valve; 31-lubricating pump; 32-power take-off; 33-manual hydraulic pump; 41-first reversing valve; 51-liquid level detector; 52-controller; 61-liquid suction filter; 62-liquid return filter;

[0024] 211-first liquid outlet; 212-second liquid outlet; 221-sub-liquid outlet;

[0025] Y - vertical direction. DETAILED DESCRIPTION

[0026] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0027] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structures in the molding mold and molding method of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the meaning of "multiple" is more than two, and the terms "installation" and "connection" 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 directly connected or indirectly connected; the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inside", "outside", etc. are only for the convenience of describing this application 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 cannot be understood as a limitation on this application. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0028] In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] In the existing wind turbine generator set, taking the structure of a semi-direct drive unit as an example, the unit is usually provided with an impeller, a main shaft, a gearbox and a generator connected in sequence, wherein the main shaft is usually rotatably connected to the bearing seat through the cooperation of two or more bearings to transmit the torque to the subsequent gearbox and generator. At the same time, since the installation location of the wind turbine generator set is usually relatively remote, its construction environment cannot be stably guaranteed. The main shaft, bearings, bearing seats and gearboxes are usually assembled in the factory to form a transmission system and then transported to the installation site of the unit by a carrier.

[0030] On this basis, the applicant found that the transmission system of existing wind turbines is usually transported by large vehicles. During the transportation process, there is usually not enough space or cost budget to set up the power source to drive the lubrication system, resulting in the bearings inside the transmission system not being well lubricated and easily damaged during transportation, resulting in a decrease in the overall reliability of the transmission system.

[0031] In order to solve the above problems, an embodiment of the present application proposes a lubrication system, in which power is obtained from the engine of the transport vehicle through a power take-off to drive the lubrication system. Good lubrication can be achieved during transportation without adding an additional power source. It has low cost and a wide range of applications.

[0032] It can be understood that the following embodiments of the present application only illustrate the application of the lubrication system in the transmission system of a wind turbine set as an example, but the lubrication system provided in the embodiments of the present application is not limited to the following embodiments, and can also be used in other occasions where lubrication is required during transportation, and to protect it.

[0033] In order to better understand this application, Figure 1 to Figure 2 The lubrication system provided by the present application is described in detail.

[0034] See also Figure 1 , Figure 1 It is a structural schematic diagram of a lubrication system provided by an embodiment of the present application.

[0035] In the first aspect, according to an embodiment of the present application, a lubrication system 100 is proposed, which is applied to a transmission system, wherein the transmission system includes a bearing 200, and the lubrication system 100 includes a liquid storage portion 10, a lubrication portion 20 and a power module 30, wherein the liquid storage portion 10 is used to hold lubricating liquid; the lubrication portion 20 is provided with a liquid outlet 21, and in the vertical direction Y, at least part of the liquid outlet 21 is arranged close to the top of the bearing 200; the power module 30 includes a lubrication pump 31 and a power take-off 32 connected to each other, the lubrication pump 31 is connected between the liquid storage portion 10 and the lubrication portion 20, and the power take-off 32 can drive the lubrication pump 31 to operate.

[0036] An embodiment of the present application provides a lubrication system 100, which can be used to achieve lubrication of bearings 200 in a transmission system during transportation. The lubrication system 100 mainly includes a liquid storage portion 10 for containing lubricating liquid, a lubrication portion 20 for transporting the lubricating liquid to the bearings 200 to be lubricated, and a power module 30 for providing power for the flow of the lubricating liquid.

[0037] Specifically, the liquid storage part 10 may be a box structure with good sealing performance and correspondingly provided with a plurality of openings, for containing a fluid substance capable of lubricating the bearing 200, such as lubricating grease, etc. Optionally, in an embodiment where a gear box is connected to the transmission system to be lubricated, the original oil tank at the gear box may be directly used as the liquid storage part 10 to reduce costs and facilitate the connection of the lubrication part 20.

[0038] The lubricating part 20 is used to transport the lubricating liquid in the liquid storage part 10 to the bearing 200 to be lubricated. Specifically, the lubricating part 20 may include at least one liquid outlet 21, which corresponds to the bearing 200 to be lubricated and is arranged close to each other. At the same time, the number of liquid outlets 21 may also correspond to the number of bearings 200. In order to enable the lubricating liquid flowing out of the liquid outlet 21 to provide a good lubricating effect on the entire bearing 200, the liquid outlet 21 may be located above the bearing 200 in the vertical direction Y, and may be located directly above the rotating shaft of the bearing 200, so that the lubricating liquid flowing into the bearing 200 from above can naturally flow downward under the action of gravity, forming a more complete infiltration effect.

[0039] Optionally, a structure for recovering lubricating fluid may be provided below the bearing 200 to guide the lubricating fluid flowing down from the bearing 200 back to the fluid storage portion 10, thereby realizing the recycling of the lubricating fluid, thereby reducing the loss of lubricating fluid and reducing costs.

[0040] The power module 30 is used to deliver the lubricating liquid in the liquid storage part 10 into the lubricating part 20, and enable it to flow along the lubricating part 20 to the bearing 200 to be lubricated. The power module 30 includes a lubrication pump 31 for directly providing pressure and driving force for the lubricating liquid and a power take-off 32 for driving the lubrication pump 31 to operate, wherein the lubrication pump 31 is connected between the liquid storage part 10 and the lubrication part 20. The power take-off 32 is also called PTO (Power Take Off), which is usually composed of a combination of a gearbox, a clutch and a control component, and the gearbox includes one or more sets of speed gears. The power take-off 32 can be interconnected with the low-gear gear of the gearbox and / or the output shaft of the auxiliary box in the vehicle used in the transport transmission system, and the power provided by the vehicle engine is output to the mechanical lubrication pump 31 to drive the lubrication pump 31 to operate.

[0041] It can be understood that only the bearing 200 is used as an example to illustrate the component that needs lubrication here, but the present application is not limited to this. It can also be applied to the lubrication of other components, such as the gear teeth in the gear box, etc., or it can also be applied to the lubrication of other mechanical structures during transportation. It only needs to set the connecting pipeline and the liquid outlet 21 at the corresponding position. The present application does not make any specific limitation on this.

[0042] The lubrication system 100 in the embodiment of the present application can be directly or indirectly connected to the engine or other power source of the transport vehicle through the power take-off 32, and the power output by the power source is transmitted to the lubrication pump 31. The bearing 200 can be lubricated during transportation without adding an additional power source, thereby reducing the probability of damage to the bearing 200, and the structure is reliable and the cost is low.

[0043] In some optional embodiments, the power module 30 further includes a manual hydraulic pump 33 , which is connected between the liquid storage portion 10 and the lubrication portion 20 .

[0044] Corresponding to the power take-off 32 used during transportation, a manual hydraulic pump 33 manually driven by a staff member may also be provided in the lubrication system 100. The manual hydraulic pump 33 is connected between the liquid storage part 10 and the lubrication part 20 similarly to the lubrication pump 31. It can generate internal pressure through manual operation to pump the lubricating liquid in the liquid storage part 10 into the lubrication part 20 and transport it to the liquid outlet 21 along the same pipeline.

[0045] After being transported to the installation site of the existing wind turbine generator set, the various components usually need to be stored on site for a certain period of time depending on the construction progress, environmental conditions, etc. Based on this, by providing a manual hydraulic pump 33 in the lubrication system 100, the bearings 200 can be lubricated regularly by manual drive under storage conditions, thereby effectively improving the scope of application and practicality of the lubrication system 100.

[0046] Optionally, the manual hydraulic pump 33 and the aforementioned lubrication pump 31 in the lubrication system 100 can be located in different branch lines, and the two ends of the two branch lines, that is, the two ends close to the liquid storage part 10 and the lubrication part 20, can be connected to each other and connected to the liquid storage part 10 and the lubrication part 20 through the same interface, so as to share the commonly used components in the lubrication system such as the filter assembly and the one-way valve, and further reduce the cost. Alternatively, the aforementioned ends can also be separately arranged and connected to the liquid storage part 10 or the lubrication part 20, respectively, so that the two branch lines are independent of each other and reduce the possibility of mutual influence. This application does not make any specific limitation on this.

[0047] In some optional embodiments, the lubrication part 20 includes a distributor 22, which is detachably connected to the liquid outlet 21 and is provided with a plurality of sub-liquid outlets 221. In the vertical direction Y, the plurality of sub-liquid outlets 221 are respectively arranged at the top of the bearing 200 and at the two side ends opposite to each other in the radial direction of the bearing 200.

[0048] The lubrication part 20 in the embodiment of the present application is used to transport the lubricating liquid to the bearing 200 to be lubricated. On this basis, in order to further improve the coverage and wetting effect of the lubricating liquid on the bearing 200, the lubricating liquid can be injected from multiple different positions corresponding to each bearing 200.

[0049] Specifically, the lubricating part 20 may be provided with a distributor 22 at the position of the liquid outlet 21, the liquid inlet of the distributor 22 is connected with the liquid outlet 21, and the liquid outlet of the distributor 22 may be provided with a plurality of sub-liquid outlets 221. The distributor 22 can divide the lubricating liquid flowing into the inside of the distributor 22 from the liquid outlet 21 into a plurality of streams corresponding to the number of the sub-liquid outlets 221 according to a preset ratio, and keep the flow rate of each sub-liquid outlet 221 at a preset ratio, for example, the same or similar, so that the lubricating liquid can be distributed to different lubrication potentials and lubricate different areas of the bearing 200 at the same time.

[0050] It can be understood that different distributors 22 can be selected in the lubrication part 20 according to the flow ratio of the lubricating liquid flowing out of each sub-outlet 221 as needed. By adjusting the structure or model of the distributor 22, the flow rates of each sub-outlet 221 can be made the same or in a preset ratio. For example, the discharge volume of the corresponding sub-outlet 221 can be calculated according to the amount of lubricating liquid required for each lubrication point, and then the corresponding distributor 22 can be selected according to the discharge volume data of each position.

[0051] It can be understood that, under storage conditions, that is, in an embodiment using a manual hydraulic pump 33, the distributor 22 may not be provided. Since the flow channel in the distributor 22 is narrow, for example, the width may be only about 1 mm, and the pressure that the manual hydraulic pump 33 can generate has a certain upper limit, in order to increase the possibility that the lubricating liquid can smoothly flow into the bearing 200, when using the manual hydraulic pump 33, the distributor 22 in the lubrication part 20 can be removed, so that the lubricating liquid flows directly into the bearing 200 from the liquid outlet 21. Alternatively, it can be directly connected to the position of the liquid outlet 21 through a branched pipeline, and multiple lubrication points can be set up through the pipeline.

[0052] In some optional embodiments, each distributor 22 includes three sub-liquid outlets 221, and the sub-liquid outlets 221 are respectively arranged at the top of the bearing 200 in the vertical direction Y and at two opposite ends of the bearing 200 in the horizontal direction.

[0053] As mentioned above, the lubrication part 20 in the embodiment of the present application may also be provided with a distributor 22 for distributing the lubricating liquid to different lubrication points. On this basis, in order to match the annular bearing 200, the distributor 22 and the bearing 200 may be arranged one-to-one, and each distributor 22 may have three sub-liquid outlets 221, and these three sub-liquid outlets 221 respectively form lubrication points above and on both sides of the bearing 200.

[0054] Specifically, on the basis that the bearing 200 is usually in a circular shape, the center of the bearing 200 is recorded as point A, and the three sub-liquid outlets 221 can be respectively located directly above point A in the vertical direction Y, and on both sides of point A in the horizontal direction, that is, the three are evenly spaced and distributed in the upper half of the bearing 200 along the circumference of the bearing 200, so that the lubricating liquid can provide lubrication to all parts of the bearing 200 more completely and comprehensively. Optionally, the flow rates at the three sub-liquid outlets 221 can be kept the same or similar, or the flow rates at the sub-liquid outlets 221 on both sides in the horizontal direction can be made the same or similar, and at the same time, the liquid output of the upper sub-liquid outlet 221 is made greater than that of the two lower sub-liquid outlets 221, and this application does not make any specific limitation on this.

[0055] See also Figure 2 , Figure 2 2 is a schematic diagram of a lubrication system according to another embodiment of the present application. In some optional embodiments, the lubrication unit 20 further includes a plunger sensor 23 , which is disposed at the sub-liquid outlet 221 and corresponds to the sub-liquid outlet 221 in a one-to-one manner.

[0056] The lubrication part 20 in the embodiment of the present application may further include a plunger sensor 23 , which is disposed at the sub-liquid outlet 221 and is used to monitor the flow of lubricating fluid at each sub-liquid outlet 221 , respectively, to further improve the reliability of the lubrication system 100 .

[0057] The plunger sensor 23 includes a hollow tubular member, in which a shuttle plunger capable of floating in the flowing fluid is arranged. When the lubricating fluid flows through the hollow tubular member, the shuttle plunger will float in the middle of the tubular member due to the pressure and buoyancy generated by the flow. If the flow of the lubricating fluid is blocked due to impurities or other reasons, the shuttle plunger will change its position and approach one of the two opposite ends of the tubular member in its own extension direction, and trigger the proximity switch arranged at the end to generate an alarm signal. By arranging the plunger sensor 23 corresponding to each sub-liquid outlet 221, the flow of the lubricating fluid at the liquid outlet can be monitored in real time, and timely processing can be carried out when problems such as blockage occur, thereby reducing the possibility of problems such as impurities in the lubricating fluid entering the bearing 200 or lubricating fluid overflowing, thereby further improving the reliability of the lubrication system 100.

[0058] It is understandable that, during the process of transporting the transmission system, the plunger sensor 23 can be connected to the alarm provided near the vehicle driving position, and the vehicle driver or other staff can receive the alarm signal in time through the alarm. Optionally, the alarm can be a signal light, a loudspeaker, etc., and the alarm signal can be issued by flashing the signal light, changing color, or playing a warning sound through the loudspeaker.

[0059] In some optional embodiments, the lubrication system 100 further includes a liquid return pipeline 40 , one end of which is connected between the lubrication pump 31 and the lubrication part 20 , and the other end is connected to the liquid storage part 10 , and the liquid return pipeline 40 is provided with a first reversing valve 41 .

[0060] The lubrication system 100 in the embodiment of the present application may also be provided with a liquid return pipeline 40 for providing a passage for the lubrication liquid in the lubrication part 20 to flow back to the liquid storage part 10 when the lubrication liquid in the lubrication part 20 is excessive, so as to prevent the lubrication liquid from overflowing.

[0061] Specifically, one end of the liquid return line 40 is connected between the lubrication pump 31 and the lubrication part 20, that is, connected to one side of the liquid outlet of the lubrication pump 31, and the other end of the liquid return line 40 can be connected to the liquid storage part 10, so that the lubricating liquid can flow back to the liquid storage part 10 through the liquid return line 40 before being pumped into the lubrication part 20 by the lubrication pump 31. The liquid return line 40 is mainly provided with a first reversing valve 41. By controlling the conduction direction of the first reversing valve 41, the flow direction of the lubricating liquid pumped out by the lubrication pump 31 can be controlled. In the first flow form, the first reversing valve 41 disconnects the liquid return line 40, and the lubricating liquid is driven by the lubrication pump 31 and flows to the liquid outlet 21. When the lubricating fluid reserve in the bearing 200 is sufficient or reaches a preset amount, the first reversing valve 41 can be controlled to change to the second flow form, so that the lubricating fluid pumped out by the lubrication pump 31 flows directly back to the liquid storage part 10 via the return line 40, thereby preventing the lubricating fluid from overflowing in the bearing 200 and further improving the reliability of the lubrication system 100.

[0062] In some optional embodiments, the lubrication system 100 further includes an automatic control module 50 , which includes a liquid level detector 51 and a controller 52 . The liquid level detector 51 is disposed in the bearing 200 , and the controller 52 is communicatively connected to the liquid level detector 51 and the first reversing valve 41 .

[0063] The lubrication system 100 in the embodiment of the present application can also realize the automatic control function of the whole system by setting an automatic control module 50, and the automatic control module 50 mainly includes a liquid level detector 51 for detecting the height of the lubricating liquid level in the lubricated parts and a controller 52 for receiving the signal of the liquid level detector 51 and controlling the first reversing valve 41 to change the state. The controller 52 can be connected to the liquid level detector 51 and the first reversing valve 41 in the return liquid pipeline 40 by communication, that is, it can be connected by direct connection of signal routing or by remote control.

[0064] It can be understood that, similar to the alarm method of the aforementioned plunger sensor 23, the controller 52 can also be set at the vehicle panel, and make different prompts when changing the state of the first reversing valve 41 or according to its different states, including prompt lights, prompt sounds, etc., and the present application does not make specific limitations on this.

[0065] Specifically, taking the lubricated part as at least one bearing 200 as an example, a liquid level detector 51 can be installed at a preset position in the cavity inside the bearing 200 for injecting lubricating liquid. For example, the distance between the installation position of the liquid level detector 51 and the bottom of the bearing 200 in the vertical direction Y is H1, and the height of the bearing 200 as a whole in the vertical direction Y is H2. The value of H1 can be about 0.7H2, that is, when the lubricating liquid submerges 70% of the bearing 200, it is considered that the bearing 200 is fully lubricated and the lubricating liquid is not easy to overflow.

[0066] The automatic control module 50 can realize automatic control of the entire lubrication system 100, so that the lubricating fluid stock in the bearing 200 can be maintained within a preset range during transportation, thereby further improving the lubrication effect and reducing the possibility of damage to the bearing 200 during transportation.

[0067] In some optional embodiments, the controller 52 is configured to receive a liquid level height signal collected by the liquid level detector 51, and when the liquid level height signal is lower than a preset value, the first reversing valve 41 is controlled to disconnect the return liquid pipeline 40; when the liquid level height signal is higher than the preset value, the first reversing valve 41 is controlled to open the return liquid pipeline 40.

[0068] On the basis of being provided with the aforementioned automatic control module 50, in the lubrication system 100 in the embodiment of the present application, when the liquid level detector 51 detects that the liquid level height in the bearing 200 is low and the lubricating fluid reserve is insufficient, the controller 52 is configured to receive the low liquid level signal and control the first reversing valve 41 to change to the aforementioned first flow form, and the lubrication pump 31 runs and pumps the lubricating fluid into the bearing 200.

[0069] As the liquid level in the bearing 200 rises, after the liquid level detector 51 detects that the liquid level has reached a preset height, the controller 52 is configured to receive the high liquid level signal and control the first reversing valve 41 to change to the aforementioned second flow form, so that the lubricating fluid flows back into the liquid storage part 10. At this time, the lubrication pump 31 can keep running, or temporarily stop running by disconnecting from the power take-off 32.

[0070] In some optional embodiments, the lubrication system 100 also includes a filter module 60, which includes a liquid suction filter 61 and a liquid return filter 62, wherein the liquid suction filter 61 is arranged between the lubrication pump 31 and the liquid storage part 10, and the liquid return filter 62 is arranged between the first reversing valve 41 and the liquid storage part 10.

[0071] The lubrication system 100 in the embodiment of the present application may further include a filtering module 60, which mainly includes a liquid suction filter 61 and a liquid return filter 62, wherein the liquid suction filter 61 is used to filter the lubricating liquid flowing from the liquid storage part 10 into the lubrication pump 31, and the liquid return filter 62 is used to filter the lubricating liquid flowing back to the liquid storage part 10 through the liquid return pipeline 40.

[0072] During the circulation of the lubricating fluid in the lubrication system 100, the problem of mixed impurities is inevitable. When the bearing 200 is lubricated during transportation, the lubricating fluid in the liquid storage part 10 flows due to the bumps of the vehicle and the impurities cannot be precipitated. By providing filters on the pipelines where the lubricating fluid flows out and flows back to the liquid storage part 10 in the lubrication system 100, the lubricating fluid can be fully filtered, reducing the possibility of impurities entering the lubrication pump 31 and the inside of the bearing 200, thereby improving the lubrication effect.

[0073] It can be understood that in the aforementioned embodiment in which a manual hydraulic pump 33 is provided, the lubrication system 100 can also be applied to storage conditions, in which the liquid storage portion 10 is fixed and the impurities therein are usually precipitated at the bottom of the lubricating liquid and rarely float up, thereby reducing the requirements for filtration, such as reducing the replacement / maintenance frequency of the filter element in the filter to reduce costs, etc. The present application does not make specific limitations on this.

[0074] In some optional embodiments, the lubrication system 100 further includes a throttle valve 70 , which is connected between the lubrication pump 31 and the lubrication part 20 .

[0075] The lubrication system in the embodiment of the present application may also include a throttle valve 70, which is arranged between the lubrication pump 31 and the lubrication part 20, and can limit the maximum instantaneous flow rate of the lubricating fluid flowing there. Since the lubrication pump 31 in the embodiment of the present application adopts a structural form of collecting vehicle power through the power take-off 32 for driving, the output power of the lubrication pump 31 is related to the output power of the vehicle engine. On this basis, in order to avoid excessive instantaneous impact of the lubricating fluid pumped out by the lubrication pump 31 and adverse effects on the bearing 200 or other components and valves in the lubrication system 100, a throttle valve 70 can be set between the lubrication pump 31 and the lubrication part 20, thereby further improving the reliability of the lubrication system 100.

[0076] In some optional embodiments, the bearing 200 includes a first bearing 80 and a second bearing 90, and the lubrication part 20 includes a first liquid outlet 211 and a second liquid outlet 212 respectively arranged corresponding to the first bearing 80 and the second bearing 90; the lubrication system 100 also includes a second reversing valve 24, one end of the second reversing valve 24 is connected between the first liquid outlet 211 and the second liquid outlet 212, and the other end is connected to the liquid storage part 10.

[0077] The lubrication system 100 in the embodiment of the present application can be used to lubricate the main transmission system of the wind turbine generator set under transportation conditions or storage conditions, for example, it can be used to lubricate the front and rear two bearings 200 arranged at intervals along the axial direction of the transmission system, that is, the bearing 200 can include a first bearing 80 and a second bearing 90. Correspondingly, the lubrication part 20 can be provided with a first liquid outlet 211 and a second liquid outlet 212 respectively arranged corresponding to the above two bearings, and the lubricating liquid flowing out of the two liquid outlets can lubricate the above two bearings respectively.

[0078] On this basis, a second reversing valve 24 may be provided between the first liquid outlet 211 and the second liquid outlet 212, and the other opening of the second reversing valve 24 is connected to the liquid storage part 10. Similar to the aforementioned first reversing valve 41, the second reversing valve 24 can switch between multiple flow forms. For example, in the third flow form, the second reversing valve 24 can form a passage between the first liquid outlet 211 and the second liquid outlet 212, so that the lubricating liquid pumped out by the lubrication pump 31 can flow out from the first liquid outlet 211 and the second liquid outlet 212 at the same time. In the fourth flow form, the second reversing valve 24 can conduct the middle position of the two liquid outlets to the liquid storage part 10, so that the lubricating liquid flows out from one of the two liquid outlets and lubricates the corresponding bearing 200, while the rest of the liquid flows directly back to the liquid storage part 10 via the second reversing valve 24.

[0079] By setting a second reversing valve 24 in a portion of the pipeline connected to the first liquid outlet 211 and the second liquid outlet 212 of the lubrication part 20, the position and number of the liquid outlets of the lubricating liquid flow path can be controlled by switching the flow form of the lubricating liquid in the second reversing valve 24, that is, part of the bearings 200 can be selected for targeted lubrication, thereby further improving the reliability of the lubrication system 100.

[0080] In the embodiment of the present application, the need to lubricate two bearings 200 simultaneously or separately is used as an example for explanation, but it should be understood that the present application is not limited to this. There may be other components that need to be lubricated in the transmission system to be lubricated, and multiple liquid outlets 21 may be correspondingly arranged in the lubrication system 100, and corresponding reversing valves may be arranged in the pipelines between adjacent liquid outlets 21 to control the flow of the lubricating liquid. The present application does not make any specific limitation on this.

[0081] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A lubrication system, applied to a transmission system, wherein the transmission system includes a bearing, characterized in that: include: A liquid storage portion, used for containing lubricating liquid; The lubricating portion is provided with a liquid outlet, and in the vertical direction, at least part of the liquid outlet is arranged close to the top end of the bearing; The power module comprises a lubrication pump and a power take-off which are connected to each other. The lubrication pump is connected between the liquid storage part and the lubrication part, and the power take-off can drive the lubrication pump to operate.

2. The lubrication system according to claim 1, characterized in that: The power module further includes a manual hydraulic pump connected between the liquid storage portion and the lubrication portion.

3. The lubrication system according to claim 1, characterized in that: The lubrication part includes a distributor, which is detachably connected to the liquid outlet and is provided with a plurality of sub-liquid outlets. In the vertical direction, the plurality of sub-liquid outlets are respectively arranged at the top of the bearing and at two opposite ends of the bearing in its own radial direction.

4. The lubrication system according to claim 3, characterized in that: Each of the distributors comprises three sub-liquid outlets, and the sub-liquid outlets are respectively arranged at the top end of the bearing in the vertical direction and at two opposite ends of the bearing in the horizontal direction.

5. The lubrication system according to claim 3, characterized in that: The lubrication part further includes a plunger sensor, and the plunger sensor is disposed at the sub-liquid outlet and is disposed in a one-to-one correspondence with the sub-liquid outlet.

6. The lubrication system according to claim 1, characterized in that: The lubrication system further comprises a liquid return pipeline, one end of which is connected between the lubrication pump and the lubrication part, and the other end of which is connected to the liquid storage part. The liquid return pipeline is provided with a first reversing valve.

7. The lubrication system according to claim 6, characterized in that: The lubrication system further includes an automatic control module, which includes a liquid level detector and a controller. The liquid level detector is disposed in the bearing, and the controller is communicatively connected with the liquid level detector and the first reversing valve.

8. The lubrication system according to claim 7, characterized in that: The controller is configured to receive a liquid level signal collected by the liquid level detector, and when the liquid level signal is lower than a preset value, control the first reversing valve to disconnect the liquid return pipeline; When the liquid level signal is higher than a preset value, the first reversing valve is controlled to open the liquid return pipeline.

9. The lubrication system according to claim 6, characterized in that: The lubrication system further comprises a filter module, which comprises a liquid suction filter and a liquid return filter. The liquid suction filter is arranged between the lubrication pump and the liquid storage part, and the liquid return filter is arranged between the first reversing valve and the liquid storage part.

10. The lubrication system according to claim 1, characterized in that: The lubrication system further includes a throttle valve connected between the lubrication pump and the lubrication part.

11. The lubrication system according to claim 1, characterized in that: The bearing comprises a first bearing and a second bearing, and the lubricating portion comprises a first liquid outlet and a second liquid outlet respectively arranged corresponding to the first bearing and the second bearing; The lubrication system further includes a second reversing valve, one end of which is connected between the first liquid outlet and the second liquid outlet, and the other end of which is connected to the liquid storage part.

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