Off-line filtering device of gearbox and wind power generation device

Abstract

The utility model discloses a gear box off-line filtering device and a wind power generation device. The gear box off-line filtering device comprises a filtering mechanism, a flow control valve and a controller, the filtering mechanism is provided with a liquid inlet and a liquid outlet, the liquid inlet is communicated with a lubricating system of a gear box through a liquid inlet pipe, the liquid outlet is communicated with an oil tank of the gear box through a liquid outlet pipe, and the flow control valve is communicated with the liquid inlet pipe. The controller is arranged between the filtering mechanism and the lubricating system, electrically connected with the flow control valve and used for controlling opening and closing of the flow control valve and flow adjustment. According to the technical scheme, the flow control valve and the controller can be additionally arranged on the basis that the gear box is provided with the lubricating system to achieve the filtering function, components such as an oil pump and a motor do not need to be installed, system configuration is simplified, the installation size is reduced, and cost is reduced.

Description

Technical Field

[0001] This application relates to the field of gearbox filtration, and in particular to an offline gearbox filtration device and a wind power generation device. Background Technology

[0002] During operation, the internal gears, bearings, and other components of a gearbox rub against each other, generating metal shavings. External dust and impurities may also mix into the lubricating oil. If these impurities are not removed in time, they will accelerate component wear. Therefore, a filtration device is needed to remove impurities from the lubricating oil and maintain good lubrication.

[0003] In existing technologies, the offline filtration devices used in the gearbox lubrication systems of wind power generation units are typically equipped with independent pump sets to achieve individual filtration functions. Their working process involves drawing lubricating oil from the gearbox, pressurizing it with the pump set, and then delivering the lubricating oil to the offline filter element for filtration. However, due to the large number of components in the offline filtration device, its structure is complex, its installation dimensions are large, and its cost is high. Utility Model Content

[0004] The purpose of this application is to provide an offline gearbox filtration device and a wind power generation device, which can simplify system configuration, reduce installation size, and lower costs.

[0005] In a first aspect, this utility model provides an offline filtration device for a gearbox, comprising:

[0006] The filtration mechanism is provided with an inlet and an outlet. The inlet is connected to the lubrication system of the gearbox through an inlet pipe, and the outlet is connected to the oil tank of the gearbox through an outlet pipe.

[0007] A flow control valve is connected to the inlet pipe and is located between the filter mechanism and the lubrication system;

[0008] The controller is electrically connected to the flow control valve and is used to control the opening and closing of the flow control valve and to regulate the flow rate.

[0009] Beneficial effects: This offline gearbox filtration device connects the inlet of the filtration mechanism to the gearbox's lubrication system via an inlet pipe. The lubrication system continuously supplies lubricating oil with a certain pressure and flow rate to the inlet pipe. After the controller opens the flow control valve, the lubricating oil in the inlet pipe flows into the filtration mechanism for filtration under the pressure of the lubrication system. The filtered lubricating oil then flows from the outlet into the outlet pipe and back to the gearbox oil tank, achieving recycling.

[0010] By electrically connecting the controller to the flow control valve, the opening and closing of the flow control valve and the flow rate can be precisely controlled according to the actual operating conditions of the gearbox. When the lubricating oil is highly contaminated or the gearbox operating conditions are complex, the flow rate can be increased to improve filtration efficiency; when the lubricating oil is in good condition, the flow rate can be appropriately reduced to save energy. Precise control of the flow control valve by the controller avoids the complex control issues of traditional devices, ensures the filtration mechanism is in optimal working condition, optimizes the filtration effect, effectively removes impurities from the lubricating oil, reduces wear on internal gearbox components, and extends the service life of the gearbox.

[0011] Compared to existing devices, this device adds a flow control valve and controller to the gearbox's built-in lubrication system to achieve filtration, eliminating the need for components such as oil pumps and motors, thus simplifying system configuration, reducing installation size, and lowering costs.

[0012] In one alternative embodiment, the flow control valve is located at the inlet.

[0013] Beneficial effects: The relatively fixed and easily accessible location of the inlet allows for convenient installation, commissioning, and routine maintenance of the flow control valve, reducing maintenance costs and complexity. Simultaneously, it facilitates real-time monitoring and troubleshooting of the flow control valve, enabling timely detection and resolution of problems and ensuring the normal operation of the system.

[0014] Furthermore, installing the flow control valve at the inlet allows for precise control of the lubricating oil flow rate into the filtration unit. Because it's close to the source of the lubricating oil entering the filtration unit, the flow rate can be quickly and accurately adjusted based on the actual operating conditions of the gearbox, such as the degree of lubricating oil contamination and the gearbox's operating conditions. This ensures the filtration unit operates at its best, improving filtration efficiency. Controlling the flow rate at the inlet better matches the operating requirements of the gearbox lubrication system, reducing system pressure fluctuations and improving the overall system stability and reliability. In addition, the flow rate can be flexibly adjusted according to actual needs, achieving energy-saving operation and reducing energy consumption.

[0015] In one alternative implementation, the flow control valve is a flow pressure reducing valve.

[0016] Beneficial effects: In offline gearbox filtration systems, flow-reducing valves ensure that the pressure and flow rate of lubricating oil entering the filtration mechanism are unaffected by system pressure fluctuations or load changes, providing stable operating conditions for the filtration mechanism and thus improving filtration efficiency and effectiveness. Flow-reducing valves also limit the pressure of lubricating oil entering the filtration mechanism, preventing damage to filter elements (such as filter cartridges) due to excessive pressure, extending the service life of filter elements, and reducing equipment maintenance costs.

[0017] At the same time, the flow pressure reducing valve can automatically adjust the flow rate according to actual needs, avoiding unnecessary waste of lubricating oil flow and pressure while meeting filtration requirements, thereby reducing system energy consumption and achieving energy-saving operation.

[0018] In addition, by stabilizing pressure and flow, the flow pressure reducing valve helps reduce pressure shocks and flow fluctuations, thereby reducing wear and failure probability of related components and improving the reliability and stability of the entire gearbox offline filtration device.

[0019] In one optional embodiment, the gearbox offline filtration device further includes a temperature sensor electrically connected to the controller. The temperature sensor is used to send the detected lubricating oil temperature value in the oil tank to the controller. The controller controls the opening and closing of the flow control valve and the flow regulation based on the received lubricating oil temperature value compared with a preset temperature value.

[0020] Beneficial effects: In low-temperature environments, lubricating oil viscosity increases and its fluidity decreases. When the temperature sensor detects a low lubricating oil temperature in the tank, it transmits this temperature data to the controller. The controller analyzes the data and reduces the opening of the flow control valve, decreasing the flow of lubricating oil into the filtration mechanism. This prevents excessive filtration pressure caused by high lubricating oil viscosity, which could damage the filter element. Simultaneously, it ensures effective filtration, preventing impurities from being difficult to remove from the low-temperature, high-viscosity lubricating oil.

[0021] When the lubricating oil temperature is too high, it indicates that the gearbox may be operating under high load or that there is an abnormality in the lubrication system, resulting in an increase in impurities. The temperature sensor feeds the high-temperature data back to the controller, which then increases the opening of the flow control valve to improve the filtration flow rate and promptly remove the large amount of impurities generated by the high temperature, ensuring the normal operation of the gearbox.

[0022] In one optional embodiment, when the lubricating oil temperature is greater than or equal to the preset temperature value, the controller controls the flow control valve to open.

[0023] When the lubricating oil temperature is lower than the preset temperature, the controller controls the flow control valve to close.

[0024] Beneficial effects: When the lubricating oil temperature is high (greater than or equal to the preset temperature), the lubricating oil viscosity is low due to the higher temperature. At this time, opening the flow control valve increases the lubricating oil flow rate, improving the filtration effect. It also effectively removes heat, preventing further temperature increases that could damage gears, bearings, and other components in the gearbox, thus extending equipment lifespan. Conversely, when the lubricating oil temperature is low (below the preset temperature), closing the flow control valve prevents excessive pressure on the filter element and related equipment during filtration due to the high viscosity of the lubricating oil at low temperatures, thus protecting the equipment.

[0025] In addition, opening the flow control valve when the lubricating oil temperature is high allows the lubricating oil to flow in a better state, which helps the filter element to remove impurities and contaminants from the oil more effectively, improves filtration efficiency, ensures the cleanliness of the lubricating oil, and provides good lubrication conditions for the gearbox.

[0026] In one alternative implementation, the controller controls the flow control valve to gradually open from a closed state to an open state.

[0027] Beneficial effects: If the flow control valve opens completely and instantaneously, a large amount of lubricating oil will rush into the filter mechanism in a short period of time, causing a sudden pressure change and pressure surge within the filter mechanism. This may damage the filter mechanism and affect the normal operation and service life of the equipment. Gradually opening the flow control valve allows the lubricating oil to enter the filter mechanism slowly, allowing the pressure inside the filter mechanism to rise gradually, avoiding sudden pressure changes and protecting the equipment.

[0028] If the flow control valve is opened suddenly, the flow rate of lubricating oil entering the filter mechanism may increase suddenly, exceeding the processing capacity of the filter mechanism and affecting the filtration effect.

[0029] In one optional implementation, the preset temperature value is greater than or equal to 15°C.

[0030] Beneficial effects: The viscosity of lubricating oil increases as temperature decreases. When the temperature is too low, the lubricating oil becomes viscous and its fluidity decreases. Setting the preset temperature value at 15℃ or above ensures that the lubricating oil has good fluidity, allowing it to circulate smoothly in the gearbox and filter, effectively transmitting power and reducing energy loss. At the same time, it ensures that the lubricating oil can pass smoothly through the filter mechanism during the filtration process, improving filtration efficiency.

[0031] In one alternative embodiment, the temperature sensor is located inside the oil tank.

[0032] Beneficial effects: Placing the temperature sensor inside the oil tank allows for direct and accurate measurement of the lubricating oil temperature. The sensor can detect and transmit the signal to the controller immediately. Since the oil tank is the main container for storing lubricating oil, its temperature represents the average temperature of the lubricating oil throughout the entire lubrication system, providing precise temperature data for the control system to accurately assess the gearbox's lubrication and heat dissipation.

[0033] Meanwhile, the oil tank usually has a relatively spacious interior, which facilitates the installation and fixation of the temperature sensor. Moreover, the oil tank's location is relatively fixed and easily accessible, making it convenient to inspect, calibrate, and replace the temperature sensor during equipment maintenance and repair, thus reducing maintenance costs and difficulty.

[0034] In one optional embodiment, the gearbox offline filtration device further includes a pressure sensor electrically connected to the controller. The pressure sensor is used to detect the lubricating oil pressure value at the inlet and send the lubricating oil pressure value to the controller. The controller controls the opening and closing of the flow control valve and the flow rate adjustment based on the received lubricating oil pressure value compared with the preset pressure value.

[0035] Beneficial effects: Excessive inlet pressure can damage the filtration mechanism, such as causing filter element rupture or seal damage. By installing a pressure sensor on the gearbox offline filtration device, the pressure sensor monitors the inlet pressure in real time. When the detected pressure exceeds the preset pressure value, the controller will control the flow control valve to reduce its opening or close, thereby reducing the inlet pressure and preventing damage to the filtration mechanism due to pressure overload, thus extending the service life of the filtration mechanism.

[0036] Insufficient inlet pressure may lead to insufficient filtration flow, affecting the filtration effect and failing to effectively remove impurities from the lubricating oil. When the pressure sensor detects that the pressure is lower than the preset pressure value, the controller will control the flow control valve to increase the opening, thereby increasing the inlet pressure and flow rate, ensuring the normal operation of the filtration mechanism and guaranteeing filtration efficiency and quality.

[0037] Secondly, this utility model also provides a wind power generation device, comprising:

[0038] cabin;

[0039] Offline gearbox filtration device, wherein the filtration mechanism is located inside the engine compartment.

[0040] Beneficial effects: This wind power generation device places the gearbox offline filtration device inside the nacelle. Compared with existing devices, this device adds a flow control valve and controller to the gearbox's built-in lubrication system to achieve the filtration function. It eliminates the need to install components such as oil pumps and motors, simplifying system configuration, reducing installation size, and lowering costs. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of the structure of an offline gearbox filtration device in related technologies;

[0043] Figure 2 This is a schematic diagram of the structure of an offline gearbox filtration device in one embodiment provided in this application;

[0044] Figure 3 This is a schematic diagram of the offline gearbox filtration device in one embodiment provided in this application.

[0045] Explanation of reference numerals in the attached figures:

[0046] Related technical figure labels:

[0047] 100', Filter element; 200', Pump assembly; 300', Inlet pipe; 400', Outlet pipe; 500', Connecting pipe.

[0048] Reference numerals in the accompanying drawings:

[0049] 100. Filtration mechanism; 110. Liquid inlet; 120. Liquid outlet;

[0050] 200. Inlet pipe;

[0051] 300. Lubrication system;

[0052] 400. Discharge tube;

[0053] 500, fuel tank;

[0054] 600. Flow control valve;

[0055] 700, Controller;

[0056] 800. Temperature sensor;

[0057] 900. Pressure sensor. Detailed Implementation

[0058] Offline filtration systems used in the gearbox lubrication systems of wind power generators are typically equipped with independent pump sets for individual filtration. Their workflow involves drawing lubricating oil from the gearbox, pressurizing it with the pump set, and then delivering it to the offline filter element for filtration. However, due to the numerous components in the offline filtration system, its structure is complex, its installation dimensions are large, and its cost is high.

[0059] During the research and development process of this application, in order to reduce the installation size of the offline filtration device, attempts were made to adopt methods such as... Figure 1 The gearbox offline filtration device shown has a pump assembly 200' positioned on one side of the filter element 100'. The pump assembly 200' is connected to the filter element 100' via a connecting pipe 500'. The pump assembly 200' is connected to the gearbox's oil tank via an inlet pipe 300', and the filter element 100' is connected to the gearbox's oil tank via an outlet pipe 400'. When using the gearbox offline filtration device, the pump assembly 200' pressurizes the oil, drawing lubricating oil from the oil tank and delivering it to the filter element 100' via the inlet pipe 300' and connecting pipe 500' for filtration. The filtered lubricating oil is then returned to the gearbox's oil tank via the outlet pipe 400'. By placing the pump assembly 200' on one side of the filter element 100', making the pump assembly 200' close to the filter element 100', the installation size of the offline filtration device can be reduced. However, the offline filtration device still needs to be driven by the pump assembly 200' and other drive mechanisms, resulting in a complex structure, large installation size, and high cost of the offline filtration device.

[0060] Based on this, the inventors of this application have redesigned the offline filtration device for gearboxes. The inlet of the filtration mechanism is connected to the gearbox's lubrication system via an inlet pipe. The lubrication system continuously supplies lubricating oil with a certain pressure and flow rate to the inlet pipe. After the controller opens the flow control valve, the lubricating oil in the inlet pipe flows into the filtration mechanism for filtration under the pressure of the lubrication system. The filtered lubricating oil enters the outlet pipe from the outlet and then flows back to the gearbox oil tank, achieving recycling. Compared to existing devices, this device adds a flow control valve and controller to the gearbox's built-in lubrication system to achieve the filtration function, eliminating the need for components such as oil pumps and motors, simplifying system configuration, reducing installation size, and lowering costs.

[0061] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0062] To solve the above technical problems, the following will be combined with... Figures 2 to 3 The following describes embodiments of the present invention.

[0063] According to embodiments of the present invention, on the one hand, such as Figures 2 to 3 As shown, an offline gearbox filtration device is provided, including a filtration mechanism 100, a flow control valve 600, and a controller 700.

[0064] Specifically, such as Figure 2 and Figure 3 As shown, the filter mechanism 100 is provided with an inlet 110 and an outlet 120. The inlet 110 is connected to the lubrication system 300 of the gearbox through an inlet pipe 200. The outlet 120 is connected to the oil tank 500 of the gearbox through an outlet pipe 400.

[0065] Specifically, such as Figure 3 As shown, the flow control valve 600 is connected to the inlet pipe 200, and the flow control valve 600 is located between the filter mechanism 100 and the lubrication system 300.

[0066] Specifically, such as Figure 3 As shown, the controller 700 is electrically connected to the flow control valve 600. The controller 700 is used to control the opening and closing of the flow control valve 600 and to regulate the flow of the flow control valve 600.

[0067] This offline gearbox filtration device connects the inlet 110 of the filtration mechanism 100 to the gearbox lubrication system 300 via the inlet pipe 200. The lubrication system 300 continuously supplies lubricating oil with a certain pressure and flow rate to the inlet pipe 200. After the controller 700 opens the flow control valve 600, the lubricating oil in the inlet pipe 200 flows into the filtration mechanism 100 for filtration under the pressure of the lubrication system 300. The filtered lubricating oil enters the outlet pipe 400 from the outlet 120 and then flows back to the gearbox oil tank 500, achieving recycling.

[0068] Through the electrical connection between the controller 700 and the flow control valve 600, the opening and closing of the flow control valve 600 and the flow rate can be precisely controlled according to the actual operating conditions of the gearbox. When the lubricating oil is highly contaminated or the gearbox operating conditions are complex, the flow rate can be increased to improve filtration efficiency; when the lubricating oil is in good condition, the flow rate can be appropriately reduced to save energy. Precise control of the flow control valve 600 by the controller 700 avoids the complexity issues of traditional control methods, ensures that the filter mechanism 100 is in optimal working condition, optimizes the filtration effect, effectively removes impurities from the lubricating oil, reduces wear on internal gearbox components, and extends the service life of the gearbox.

[0069] Compared to existing devices, this device adds a flow control valve 600 and a controller 700 to the gearbox's built-in lubrication system 300 to achieve filtration function. It eliminates the need to install components such as oil pumps and motors, simplifying system configuration, reducing installation size, and lowering costs.

[0070] Specifically, the filter mechanism 100 can be selected from cartridge filter mechanism, centrifugal filter mechanism, magnetic filter mechanism, vacuum filter mechanism, etc. In this embodiment, the type of filter mechanism 100 is not specifically limited.

[0071] For example, the filter mechanism 100 uses a cartridge-type filter to filter the lubricating oil. It effectively intercepts various impurities and particles, offering a wide range of precision. Different precision levels of filter elements, such as 1μm, 3μm, 5μm, and 10μm, can be selected according to actual needs. The structure is relatively simple, filter element installation and replacement are convenient, and the cost is relatively low. It is suitable for offline filtration in general gearbox lubrication systems, meeting the filtration requirements of most conventional operating conditions and effectively protecting the precision components inside the gearbox. For instance, in the gearboxes of some wind power generation devices, if the gearbox operating environment is dusty but the filtration precision requirement is not extremely high, a cartridge-type filter mechanism with a precision of approximately 3μm can be selected. The cartridge-type filter mechanism can also filter water from the lubricating oil, improving the quality and performance of the lubricating oil.

[0072] Specifically, the inlet 110 is typically located on the side of the filter mechanism 100 near the gearbox lubrication system 300, so as to facilitate direct connection to the lubrication system 300 via the inlet pipe 200. The outlet 120 can be located on the side of the filter mechanism 100 near the gearbox oil tank 500, so that the filtered lubricating oil can flow back to the oil tank 500 via the outlet pipe 400. The inlet 110 and outlet 120 can also be located at other positions on the filter mechanism 100. In this embodiment, the positions of the inlet 110 and outlet 120 are not specifically limited.

[0073] Specifically, seals can be installed at the connections between the inlet 110 and outlet 120 and the inlet pipe 200 and outlet pipe 400 to prevent lubricating oil leakage. O-rings, gaskets, etc., can be used as seals. In practical applications, appropriate sealing materials and structures can be selected based on the working pressure, temperature, and medium characteristics.

[0074] Specifically, the flow control valve 600 can be selected from ordinary throttle valves, speed control valves, overflow throttle valves, electric flow control valves, etc. In this embodiment, the type of flow control valve 600 is not specifically limited.

[0075] Specifically, the controller 700 can be an existing controller such as a PLC (Programmable Logic Controller), a microcontroller, or a computer control system. In this embodiment, the type of controller 700 is not specifically limited.

[0076] In one embodiment, such as Figure 2 As shown, the flow control valve 600 is installed at the inlet 110 of the filter mechanism 100.

[0077] The inlet 110 is relatively fixed and easily accessible. Installing the flow control valve 600 at the inlet 110 facilitates installation, commissioning, and routine maintenance, reducing maintenance costs and difficulty. Simultaneously, it also allows for real-time monitoring and troubleshooting of the flow control valve 600, enabling timely detection and resolution of problems and ensuring the normal operation of the system.

[0078] Furthermore, by installing the flow control valve 600 at the inlet 110, the flow rate of the lubricating oil entering the filter mechanism 100 can be precisely controlled directly. Because it is close to the source of the lubricating oil entering the filter mechanism 100, the flow rate can be quickly and accurately adjusted according to the actual operating conditions of the gearbox, such as the degree of lubricating oil contamination and the gearbox's operating conditions, ensuring the filter mechanism 100 is in optimal working condition and improving filtration efficiency. By controlling the flow rate at the inlet 110, the operating requirements of the gearbox lubrication system 300 can be better matched, reducing system pressure fluctuations and improving the stability and reliability of the entire system. In addition, the flow rate can be flexibly adjusted according to actual needs, achieving energy-saving operation and reducing energy consumption.

[0079] In one embodiment, in the gearbox offline filtration device, the flow control valve 600 is configured as a flow pressure reducing valve.

[0080] In the gearbox offline filtration device, the flow pressure reducing valve ensures that the pressure and flow rate of the lubricating oil entering the filter mechanism 100 are not affected by system pressure fluctuations or load changes, providing stable operating conditions for the filter mechanism 100, thereby improving filtration effect and efficiency. The flow pressure reducing valve can limit the pressure of the lubricating oil entering the filter mechanism 100, preventing damage to the filter elements (such as filter cartridges) of the filter mechanism 100 due to excessive pressure, extending the service life of the filter elements, and reducing equipment maintenance costs.

[0081] At the same time, the flow pressure reducing valve can automatically adjust the flow rate according to actual needs, avoiding unnecessary waste of lubricating oil flow and pressure while meeting filtration requirements, thereby reducing system energy consumption and achieving energy-saving operation.

[0082] In addition, by stabilizing pressure and flow, the flow pressure reducing valve helps reduce pressure shocks and flow fluctuations, thereby reducing wear and failure probability of related components and improving the reliability and stability of the entire gearbox offline filtration device.

[0083] In one embodiment, such as Figure 3As shown, the gearbox offline filtration device also includes a temperature sensor 800, which is electrically connected to the controller 700. The temperature sensor 800 is used to detect the temperature of the lubricating oil in the oil tank 500 and sends the detected lubricating oil temperature value to the controller 700. The controller 700 controls the opening and closing of the flow control valve 600 and the flow rate adjustment based on the comparison between the received lubricating oil temperature value and a preset temperature value.

[0084] At low temperatures, the viscosity of lubricating oil increases, and its flowability decreases. When the temperature sensor 800 detects a low temperature in the lubricating oil in the oil tank 500, it transmits the lubricating oil temperature data to the controller 700. After analysis, the controller 700 reduces the opening of the flow control valve 600, decreasing the flow rate of lubricating oil into the filter mechanism 100. This prevents damage to the filter element of the filter mechanism 100 due to excessively high filtration pressure caused by excessively high lubricating oil viscosity, while ensuring filtration effectiveness and preventing impurities from being difficult to filter out in low-temperature, high-viscosity lubricating oil.

[0085] When the lubricating oil temperature is too high, it indicates that the gearbox may be operating under high load or that the lubrication system 300 is malfunctioning, resulting in increased impurities. The temperature sensor 800 feeds back the high-temperature data to the controller 700, which then increases the opening of the flow control valve 600 to improve the filtration flow rate and promptly remove the large amount of impurities generated by the high temperature, ensuring the normal operation of the gearbox.

[0086] Specifically, by monitoring the lubricating oil temperature in real time through the temperature sensor 800, the controller 700 can precisely control the flow control valve 600, avoiding unnecessary energy consumption. For example, when the lubricating oil temperature is within a suitable range and the amount of impurities is relatively stable, the controller 700 automatically adjusts the flow control valve 600 to maintain a low filtration flow rate and reduce system energy consumption.

[0087] In addition, the temperature sensor 800 continuously monitors the lubricating oil temperature. Once the lubricating oil temperature changes abnormally, the controller 700 can not only adjust the flow control valve 600, but also trigger an early warning mechanism to notify maintenance personnel to check whether there are faults in the gearbox and lubrication system 300, such as gear wear, bearing damage, or cooling system failure, so that timely measures can be taken to prevent the fault from escalating.

[0088] Specifically, the temperature sensor 800 can be selected from thermocouple temperature sensors, resistance temperature sensors, semiconductor temperature sensors, etc. In this embodiment, the type of temperature sensor 800 is not specifically limited.

[0089] Specifically, the temperature sensor 800 can be installed inside the oil tank 500, at the liquid inlet 110 of the filter mechanism 100, inside the gearbox, etc. In this embodiment, the installation location of the temperature sensor 800 is not specifically limited.

[0090] In one embodiment, when the lubricating oil temperature is greater than or equal to a preset temperature value, the controller 700 controls the flow control valve 600 to open; when the lubricating oil temperature is less than the preset temperature value, the controller 700 controls the flow control valve 600 to close.

[0091] When the lubricating oil temperature is high (greater than or equal to the preset temperature), the lubricating oil viscosity is low due to the higher temperature. At this time, the flow control valve 600 is opened to increase the lubricating oil flow rate, improving the filtration effect. It also effectively removes heat, preventing further temperature increases that could damage gears, bearings, and other components in the gearbox, thus extending the equipment's lifespan. Conversely, when the lubricating oil temperature is low (below the preset temperature), the flow control valve 600 is closed to prevent excessive pressure on the filter element and related equipment during filtration due to the high viscosity of the lubricating oil at low temperatures, thus protecting the equipment.

[0092] In addition, when the lubricating oil temperature is high, the flow control valve 600 is opened to ensure that the lubricating oil is in a better flow state. This helps the filter element to remove impurities and contaminants from the oil more effectively, improves the filtration efficiency, ensures the cleanliness of the lubricating oil, and provides good lubrication conditions for the gearbox.

[0093] In one embodiment, when the controller 700 controls the flow control valve 600 to move from a closed state to an open state, the controller 700 controls the flow control valve 600 to gradually open.

[0094] If the flow control valve 600 opens completely and instantaneously, a large amount of lubricating oil will rush into the filter mechanism 100 in a short period of time, causing a sudden pressure change within the filter mechanism 100 and generating a pressure surge. This may damage the filter mechanism 100, affecting the normal operation and service life of the equipment. Gradually opening the flow control valve 600 allows the lubricating oil to slowly enter the filter mechanism 100, allowing the pressure within the filter mechanism 100 to gradually increase, avoiding sudden pressure changes and protecting the equipment.

[0095] If the flow control valve 600 is opened suddenly, the flow rate of lubricating oil entering the filter mechanism 100 may suddenly increase, exceeding the processing capacity of the filter mechanism 100 and affecting the filtration effect.

[0096] For example, instantaneously opening the flow control valve 600 may subject the filter element to excessive pressure, leading to a decrease in filtration accuracy or even damage to the filter element. Gradually opening the flow control valve 600 allows the flow rate to increase smoothly, giving the filter mechanism 100 sufficient time to adapt to the flow rate change, ensuring the stability and reliability of the filtration effect.

[0097] Specifically, precise control of the opening process of the flow control valve 600 can be achieved through a control algorithm programmed in the controller 700. For example, an initial opening degree, a target opening degree, and an opening time can be set in the controller 700. Following a linear relationship, the controller 700 gradually increases the opening degree of the flow control valve 600 within the set time until the target opening degree is reached. For instance, if the flow control valve 600 is set to gradually open from 0% to 100% opening within 10 seconds, the controller 700 will increase the valve opening by 10% per second.

[0098] In one embodiment, the preset temperature value is set to be greater than or equal to 15°C.

[0099] The viscosity of lubricating oil increases as temperature decreases. When the temperature is too low, the lubricating oil becomes viscous and its fluidity decreases. Setting the preset temperature value at 15℃ or above ensures that the lubricating oil has good fluidity, allowing it to circulate smoothly in the gearbox and filter, effectively transmitting power and reducing energy loss. At the same time, it ensures that the lubricating oil can pass smoothly through the filter mechanism during the filtration process, improving filtration efficiency.

[0100] It should be noted that temperature has a certain impact on filtration efficiency. When the lubricating oil temperature is low, impurities and contaminants in the lubricating oil may bind more tightly to it, increasing the difficulty of filtration. However, at temperatures of 15°C and above, impurities in the lubricating oil are more easily separated, and the filter element can more effectively intercept and remove impurities, thereby improving the cleanliness of the lubricating oil and providing better lubrication protection for the gearbox.

[0101] In one embodiment, the temperature sensor 800 is installed inside the oil tank 500.

[0102] By placing a temperature sensor 800 inside the oil tank 500, the temperature of the lubricating oil inside the tank 500 can be directly and accurately measured. The temperature sensor 800 inside the oil tank 500 can detect and transmit the signal to the controller 700 immediately. Since the oil tank 500 is the main container for storing lubricating oil, the temperature of the lubricating oil here can represent the average temperature state of the lubricating oil in the entire lubrication system 300, providing accurate temperature data for the control system to accurately determine the lubrication and heat dissipation status of the gearbox.

[0103] Meanwhile, the oil tank 500 typically has ample space, facilitating the installation and securing of the temperature sensor 800. Furthermore, the relatively fixed and easily accessible location of the oil tank 500 makes it convenient to inspect, calibrate, and replace the temperature sensor 800 during equipment maintenance and repair, reducing maintenance costs and complexity.

[0104] In one embodiment, such as Figure 2 and Figure 3As shown, the gearbox offline filtration device also includes a pressure sensor 900, which is electrically connected to the controller 700. The pressure sensor 900 is used to detect the lubricating oil pressure value at the inlet 110 and send the detected lubricating oil pressure value to the controller 700. The controller 700 controls the opening and closing of the flow control valve 600 and the flow regulation based on the comparison between the received lubricating oil pressure value and the preset pressure value.

[0105] Excessive pressure at the inlet 110 may damage the filter mechanism 100, such as causing filter element breakage or seal damage. By installing a pressure sensor 900 on the gearbox offline filter device, the pressure sensor 900 monitors the pressure at the inlet 110 in real time. When the detected pressure exceeds the preset pressure value, the controller 700 will control the flow control valve 600 to reduce its opening or close, thereby reducing the inlet pressure and preventing damage to the filter mechanism 100 due to pressure overload, thus extending the service life of the filter mechanism 100.

[0106] If the pressure at the inlet 110 is too low, the filtration flow rate may be insufficient, affecting the filtration effect and failing to effectively remove impurities from the lubricating oil. When the pressure sensor 900 detects that the pressure is lower than the preset pressure value, the controller 700 will control the flow control valve 600 to increase the opening, increasing the inlet pressure and flow rate, ensuring the normal operation of the filter mechanism 100, and guaranteeing filtration efficiency and quality.

[0107] In practical applications, the pressure sensor 900 continuously monitors the pressure at the inlet 110. If abnormal pressure fluctuations occur, such as a sudden increase or decrease in pressure, the controller 700 can issue an alarm in a timely manner, prompting the operator to check whether there is a fault in the system.

[0108] Specifically, the pressure sensor 900 can be a strain gauge pressure sensor, a piezoresistive pressure sensor, a capacitive pressure sensor, etc. In this embodiment, the type of pressure sensor 900 is not specifically limited.

[0109] Specifically, the pressure sensor 900 can be installed on the top of the filter mechanism 100 or at the liquid inlet 110. In this embodiment, the installation position of the pressure sensor 900 is not specifically limited.

[0110] The working principle of the gearbox offline filtration device in this embodiment is described as follows:

[0111] The inlet 110 of the filter mechanism 100 is connected to the gearbox lubrication system 300 via the inlet pipe 200. The lubrication system 300 provides lubricating oil with a certain pressure and flow rate to the inlet pipe 200. After the controller 700 controls the flow control valve 600 to open, the lubricating oil in the inlet pipe 200 flows into the filter mechanism 100 for filtration under the pressure of the lubrication system 300. The filtered lubricating oil enters the outlet pipe 400 from the outlet 120 and then flows back to the gearbox oil tank 500, realizing recycling.

[0112] The temperature sensor 800 is installed inside the oil tank 500 to monitor the temperature of the lubricating oil in the tank 500 in real time. When the oil temperature changes, the temperature sensor 800 transmits the lubricating oil temperature value to the controller 700. If the lubricating oil temperature value exceeds the preset temperature value (greater than or equal to 15°C), the controller 700 will control the flow control valve 600 to increase the circulation flow of the lubricating oil, allowing more lubricating oil to pass through the filter mechanism 100 for filtration. If the lubricating oil temperature value is lower than the preset temperature value (greater than or equal to 15°C), the controller 700 will control the flow control valve 600 to close.

[0113] Pressure sensor 900 is used to detect the lubricating oil pressure at inlet 110. Pressure sensor 900 sends the detected lubricating oil pressure value to controller 700, which compares it with a preset pressure value. When the lubricating oil pressure is too high, controller 700 controls flow control valve 600 to reduce its opening or close it to prevent damage to filter mechanism 100 due to pressure overload; when the lubricating oil pressure is too low, controller 700 controls flow control valve 600 to increase its opening to ensure sufficient pressure and flow for filter mechanism 100 to operate normally, guaranteeing filtration efficiency and quality.

[0114] According to an embodiment of the present invention, on the other hand, as... Figures 2 to 3 As shown, a wind power generation device is also provided, including a nacelle (not shown) and a gearbox offline filtration device.

[0115] Specifically, the filter unit 100 is installed inside the cabin.

[0116] This wind power generation device places the gearbox offline filtration device inside the nacelle. Compared with existing devices, this device adds a flow control valve 600 and a controller 700 to the gearbox's built-in lubrication system 300 to achieve the filtration function. It eliminates the need to install components such as oil pumps and motors, simplifying the system configuration, reducing the installation size, and lowering costs.

[0117] The terms "upper" and "lower" are used to describe the relative positions of the various structures in the accompanying drawings. They are only for clarity of description and are not intended to limit the scope of implementation of this application. Any changes or adjustments to the relative positions without substantially altering the technical content shall also be considered within the scope of implementation of this application.

[0118] It should be noted that, in this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0119] Furthermore, in this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0120] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A gearbox off-line filter apparatus, characterized in that, The gearbox offline filtering device comprises a filtering mechanism (100) provided with an inlet (110) and an outlet (120), wherein the inlet (110) is communicated with a lubricating system (300) of the gearbox through an inlet pipe (200), and the outlet (120) is communicated with an oil tank (500) of the gearbox through an outlet pipe (400); a flow control valve (600) communicated with the inlet pipe (200) and arranged between the filtering mechanism (100) and the lubricating system (300); and a controller (700) electrically connected with the flow control valve (600) and used for controlling opening and closing and flow regulation of the flow control valve (600). The flow control valve (600) is arranged at the inlet (110). The flow control valve (600) is a flow pressure reducing valve. The gearbox offline filtering device further comprises a temperature sensor (800) electrically connected with the controller (700), wherein the temperature sensor (800) is used for sending a detected lubricating oil temperature value in the oil tank (500) to the controller (700), and the controller (700) controls opening and closing and flow regulation of the flow control valve (600) based on comparison between the received lubricating oil temperature value and a preset temperature value.

2. The gearbox off-line filter apparatus of claim 1, wherein, In a state that the lubricating oil temperature value is greater than or equal to the preset temperature value, the controller (700) controls the flow control valve (600) to be opened.

3. The gearbox off-line filter apparatus of claim 1, wherein, In a state that the lubricating oil temperature value is less than the preset temperature value, the controller (700) controls the flow control valve (600) to be closed.

4. The gearbox off-line filter device according to any one of claims 1 to 3, characterized in that, In a state that the controller (700) controls the flow control valve (600) to be switched from a closed state to an opened state, the controller (700) controls the flow control valve (600) to be gradually opened.

5. The gearbox off-line filter apparatus of claim 4, wherein, The preset temperature value is greater than or equal to 15℃. The temperature sensor (800) is arranged in the oil tank (500).

6. The gearbox off-line filter apparatus of claim 5, wherein, The gearbox offline filtering device further comprises a pressure sensor (900) electrically connected with the controller (700), wherein the pressure sensor (900) is used for detecting a lubricating oil pressure value at the inlet (110) and sending the lubricating oil pressure value to the controller (700), and the controller (700) controls opening and closing and flow regulation of the flow control valve (600) based on comparison between the received lubricating oil pressure value and a preset pressure value.

7. The gearbox off-line filter apparatus of claim 5, wherein, The gearbox offline filtering device comprises a filtering mechanism (100) provided with an inlet (110) and an outlet (120), wherein the inlet (110) is communicated with a lubricating system (300) of the gearbox through an inlet pipe (200), and the outlet (120) is communicated with an oil tank (500) of the gearbox through an outlet pipe (400); a flow control valve (600) communicated with the inlet pipe (200) and arranged between the filtering mechanism (100) and the lubricating system (300); and a controller (700) electrically connected with the flow control valve (600) and used for controlling opening and closing and flow regulation of the flow control valve (600).

8. The gearbox off-line filter apparatus of claim 4, wherein, The gearbox offline filtering device comprises a filtering mechanism (100) provided with an inlet (110) and an outlet (120), wherein the inlet (110) is communicated with a lubricating system (300) of the gearbox through an inlet pipe (200), and the outlet (120) is communicated with an oil tank (500) of the gearbox through an outlet pipe (400); a flow control valve (600) communicated with the inlet pipe (200) and arranged between the filtering mechanism (100) and the lubricating system (300); and a controller (700) electrically connected with the flow control valve (600) and used for controlling opening and closing and flow regulation of the flow control valve (600).

9. The gearbox off-line filter apparatus of claim 4, wherein, ​ 10. A wind power plant, characterized in that ​ ​ ​

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