Filtering protection method for lubricating system of wind turbine generator

Abstract

The invention provides a wind turbine generator lubricating system filtering protection method, which relates to the field of wind turbine generators, and comprises the following steps: adding a protection filter screen at the bottom of a filter of a wind turbine generator lubricating main system, placing the protection filter screen in a mounting hole at the bottom of the filter of a lubricating main pump, and intercepting particulate matters accumulated in a filter cartridge of the original filter; and the installation and use of the filter element of the original filter are not influenced after the protective filter screen is additionally arranged. The protective filter screen is made of 304 materials. According to the scheme, the protective filter screen is additionally arranged at the filter outlet of the main lubricating system, particles are intercepted through the filter screen and prevented from entering the downstream of the system, and stable operation of the lubricating system is guaranteed. The scheme is simple in structure, convenient to install, low in cost and suitable for upgrading and reconstruction of a lubricating system of an installed unit. And a 304 material is adopted, so that the device is corrosion-resistant and adapts to severe environments, and the service life of the protective filter screen is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of wind turbine generator sets, and in particular to a filtering and protection method for a lubrication system of a wind turbine generator set. Background Art

[0002] When the filter element of the wind turbine gear oil lubrication main system is replaced, the particles accumulated in the filter cartridge It may enter the downstream of the system and cause the nozzles of lubrication components to be clogged, affecting the normal operation of the unit, increasing maintenance costs and the risk of equipment failure.

[0003] Deficiencies in previous research: Traditional lubrication systems lack effective protective measures to prevent particles in the filter cartridge from entering the downstream system during filter element replacement, making it impossible to avoid equipment failure caused by particles clogging the nozzle. Summary of the Invention

[0004] The present invention provides a filtering and protecting method for a lubrication system of a wind turbine generator set, which is used to solve the technical problems raised by the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention discloses a filtration protection method for a lubrication system of a wind turbine generator set, comprising: A protective filter is installed at the bottom of the filter of the main lubrication system of the wind turbine. The protective filter is placed in the installation hole at the bottom of the lubrication main pump filter to intercept particulate matter accumulated in the original filter cartridge. The installation of the protective filter does not affect the installation and use of the filter element of the original filter.

[0006] Preferably, the protective filter screen is installed at the bottom of the filter of the main lubrication system of the wind turbine generator set, including: Step 1: Disconnect the gear oil lubrication main pump motor pump group circuit breaker; Step 2: Open the oil drain ball valve of the lubrication main pump filter and collect the oil discharged from the filter cartridge with a clean oil collection box; Step 3: Open the filter cover of the lubrication main pump, wait for the oil to be drained from the drain ball valve, and then remove the filter element; Step 4: Place the protective filter into the bottom mounting hole of the lubrication main pump filter; Step 5: After the protective filter is installed, reinstall the filter element and restore the unit.

[0007] Preferably, the protective filter is made of 304 material.

[0008] Preferably, the protective filter is commonly used in hydraulic stations of the brands of Telijia, Sanksais, and Chuanrun.

[0009] Preferably, the protective filter comprises: The mounting plate has a plurality of frames spaced apart along the circumference of the lower end of the mounting plate. The filter screen is mounted in the mounting hole in the middle of the mounting plate, and the bottom of the filter screen is supported on the frames.

[0010] Preferably, a chamfer is provided on the upper portion of the mounting hole.

[0011] Preferably, a handle is provided on the top of the mounting plate.

[0012] Preferably, the testing process includes: Step 01: Based on the current filter element pore size, determine the first pore size range of the filter screen, and select several target first pore sizes from the first pore size range; Step 02: Obtain the common impurity particle size distribution of the hydraulic oil in the current hydraulic station; Step 03: A first test is performed using hydraulic oil from the current hydraulic station containing impurity particles of a first size through a structure in which an initially used filter element is combined with different initially used target filter screens. Based on key parameters of filtration-related oil at the filter element inlet, key parameters of filtration-related oil at the target filter screen inlet, and key parameters of filtration-related oil at the target filter screen outlet during the first test, a first usage effect evaluation value of each target filter screen is determined. The pore size of the target filter screen is the target first pore size. Step 04: A second test is performed using hydraulic oil from the current hydraulic station containing impurity particles of a second size through a structure in which an initially used filter element is combined with different initially used target filter screens. Based on the key parameters of the filtration-related oil at the filter element inlet, the key parameters of the filtration-related oil at the target filter screen inlet, and the key parameters of the filtration-related oil at the target filter screen outlet during the second test, a first usage effect evaluation value of each target filter screen is determined; Step 05: Determine a comprehensive usage evaluation value of each target filter based on the first usage effect evaluation value and the second usage effect evaluation value; Step 06: Determine the median of the apertures of the N target filters (4) with the smallest comprehensive utilization evaluation values ​​as the set filter aperture, and install the filter with the actual aperture being the set filter aperture to the current hydraulic station.

[0013] Preferably, the current filter element pore size is determined based on the common impurity particle size distribution of the hydraulic oil of the current hydraulic station, the first impurity particle size is the common impurity particle size of the hydraulic oil of the current hydraulic station that is greater than or equal to the current filter element pore size, and the second impurity particle size is the average value of the common impurity particle size of the hydraulic oil of the current hydraulic station that is smaller than the current filter element pore size.

[0014] Preferably, the first usage effect evaluation value is calculated based on the following formula: ; in, is the first usage effect evaluation value of the j-th target filter; is the i-th filter-related oil key parameter of the filter element inlet oil during the first test of the j-th target filter; is the key parameter of the ith filter-related oil at the inlet of the target filter during the first test of the jth target filter; is the i-th key parameter of the filtration-related oil at the outlet of the target filter during the first test of the j-th target filter; the key parameters of the filtration-related oil include: oil flow rate and pressure; N is the total number of key parameters of the filtration-related oil; is the evaluation weight of the key parameters of the ith filter-related oil; The second usage effect evaluation value is calculated based on the following formula: ; in is the second usage effect evaluation value of the j-th target filter; is the jth filter-related oil key parameter of the filter element inlet oil during the second test of the jth target filter; is the jth filter-related oil key parameter at the inlet of the target filter during the second test of the jth target filter; is the jth filter-related oil key parameter at the outlet of the target filter during the first test of the jth target filter; ; in, is the comprehensive utilization evaluation value of the j-th target filter; is the first usage effect evaluation value weight; It is the second usage effect evaluation value weight.

[0015] Compared with the prior art, the present invention has the following beneficial effects: First, the protective filter effectively intercepts particulate matter, preventing the lubrication component nozzles from clogging and reducing the risk of equipment failure; Second, the structure is simple and easy to install, without the need for large-scale modification of the original system, thus reducing modification costs and maintenance difficulties; Third, it uses 304 material, which is corrosion-resistant, adaptable to harsh environments, and extends the service life of the protective filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a structural schematic diagram of the protective filter screen of the present invention; Figure 2 A top view of the protective filter screen of the present invention; Figure 3 A bottom view of the protective filter screen of the present invention; Figure 4 This is a front view of the protective filter screen of the present invention; Figure 5 for Figure 4 Medium AA view.

[0018] In the picture: 1. Handle; 2. Mounting plate; 3. Frame; 4. Filter. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0020] The present invention provides a wind turbine lubrication system filtering protection method, such as Figure 1-Figure 5 Shown, including: A protective filter is installed at the bottom of the filter of the main lubrication system of the wind turbine. The protective filter is placed in the installation hole at the bottom of the lubrication main pump filter to intercept particulate matter accumulated in the original filter cartridge. The installation of the protective filter does not affect the installation and use of the filter element of the original filter.

[0021] Preferably, the protective filter screen is installed at the bottom of the filter of the main lubrication system of the wind turbine generator set, including: Step 1: Disconnect the gear oil lubrication main pump motor pump group circuit breaker; Step 2: Open the oil drain ball valve of the lubrication main pump filter and use a clean oil collection box to collect the oil discharged from the filter cartridge; the above-mentioned filter includes a filter cartridge, and the filter element is installed in the mounting hole at the bottom of the filter cartridge. This is existing technology, such as CN216715199U.

[0022] Step 3: Open the filter cover of the lubrication main pump, wait until the oil at the drain ball valve is completely drained, and then remove the filter element; Step 4: Place the protective filter into the bottom mounting hole of the lubrication main pump filter; Step 5: After the protective filter is installed, reinstall the filter element and restore the unit.

[0023] Preferably, the protective filter is made of 304 material.

[0024] Preferably, the protective filter is commonly used in hydraulic stations of the brands of Telica, Sanxes, and Chuanrun.

[0025] Preferably, the protective filter comprises: The mounting plate 2 has a plurality of frames 3 arranged at intervals along the circumference of the lower end of the mounting plate 2 . The filter screen 4 is installed in the mounting hole in the middle of the mounting plate 2 , and the bottom of the filter screen 4 is supported on the frames 3 .

[0026] Preferably, a chamfer is provided on the upper portion of the mounting hole.

[0027] Preferably, a handle 1 is provided on the top of the mounting plate 2 .

[0028] Key technical points: material selection of protective filter (304 material ensures corrosion resistance), Installation position (bottom mounting hole of lubrication main pump filter) and compatibility with the original filter element (installation does not affect the installation and use of the original filter element).

[0029] Protection point: material, installation location and quantity of protective filter.

[0030] Implementation scenario: MySE3.0MW wind turbine lubrication system protection transformation Original system problem: When the gear oil lubrication main system replaces the filter element, the particles accumulated in the filter cartridge It is easy for pollutants to enter the system downstream and cause the nozzles of lubricating parts to become clogged.

[0031] Modification plan: Install a protective filter at the bottom of the main lubrication system filter (MySE3.0MW The specific installation steps are as follows: 1. Disconnect the gear oil lubrication main pump motor pump group circuit breaker; 2. Open the oil drain ball valve of the lubrication main pump filter and collect the oil discharged from the filter cartridge with a clean oil collection box; 3. Open the end cover of the lubrication main pump filter, wait until the oil at the drain ball valve is completely drained, and then remove the filter element; 4. Place the protective filter into the bottom mounting hole of the lubrication main filter; 5. After the filter is installed, reinstall the filter element and restore the unit.

[0032] Results: Testing the installation of protective filter samples on MySE3.0MW Telijia, Sanksais, and Chuanrun hydraulic stations in the workshop revealed that the protective filter is universally applicable to the three brands of hydraulic stations. Full-power testing also revealed that the installation of the filter had almost no effect on the operation of the main lubrication system, with no noticeable pressure loss.

[0033] Comparative Example Comparative Example 1: Original lubrication system without protective filter Structure: Ordinary filter element, without protective filter screen.

[0034] Result: When replacing the filter element, the particles accumulated in the filter cartridge are easy to enter the system downstream, causing lubrication Component nozzles become clogged, increasing the risk of equipment failure.

[0035] Comparative Example 2: Lubrication system of protective filter made of other materials Structure: Use non-304 material protective filter.

[0036] Result: The protective filter is prone to corrosion and has a short service life, which may cause filter fragments to enter the system and affect the normal operation of the system.

[0037] Summarize: This solution installs a protective filter at the bottom of the wind turbine's main lubrication system filter. Effectively intercept particles accumulated in the filter cartridge to prevent them from entering the downstream system, thus protecting the lubrication system Stable operation. This solution has a simple structure, easy installation, low cost, and is both economical and reliable.

[0038] During operation, when the filter element is replaced, the oil in the filter cartridge is discharged and the protective filter intercepts the oil The protective filter is commonly used in hydraulic stations of brands such as Telulica, Sanxes, and Chuanrun. Installation does not affect the installation and use of the original filter element.

[0039] This solution proposes adding a protective screen at the outlet of the main lubrication system filter. This screen intercepts particulate matter, preventing it from entering the downstream system and ensuring stable operation of the lubrication system. This solution is simple in structure, easy to install, and low in cost, making it suitable for upgrading the lubrication systems of existing units.

[0040] The beneficial effects of the above technical solution are: First, the protective filter effectively intercepts particulate matter, preventing the lubrication component nozzles from clogging and reducing the risk of equipment failure; Second, the structure is simple and easy to install, without the need for large-scale modification of the original system, thus reducing modification costs and maintenance difficulties; Third, it uses 304 material, which is corrosion-resistant, adaptable to harsh environments, and extends the service life of the protective filter.

[0041] Example 2, based on Example 1, 8. A wind turbine lubrication system filtration protection method according to claim 1, characterized in that it further comprises: a testing process, wherein the testing process comprises: Step 01: Based on the current filter element pore size, determine the first pore size range of the filter 4 (which can be the filter element pore size ± 3μm), and select several target first pore sizes from the first pore size range (which can be selected as integers or at preset intervals); Step 02: Obtain the common impurity particle size distribution of the hydraulic oil in the current hydraulic station (if the test finds that 10-15μm particles account for 50%, 5-10μm particles account for 40%, and 3-5μm particles account for 10%, the filter aperture needs to be designed to intercept particles larger than 5μm (the majority of particles or determined according to specific interception requirements). The filter aperture can be 5μm); Step 03: A first test is performed using hydraulic oil from the current hydraulic station containing impurity particles of a first size through a structure in which an initially used filter element is combined with different initially used target filter screens 4. Based on key parameters of the filtration-related oil at the filter element inlet, key parameters of the filtration-related oil at the inlet of the target filter screen 4, and key parameters of the filtration-related oil at the outlet of the target filter screen 4 during the first test, a first usage effect evaluation value of each target filter screen 4 is determined. The pore size of the target filter screen 4 is the target first pore size. Step 04: A second test is performed using the hydraulic oil of the current hydraulic station containing impurity particles of a second size through a structure in which an initially used filter element is combined with different initially used target filter screens 4. Based on the key parameters of the filtration-related oil at the filter element inlet, the key parameters of the filtration-related oil at the inlet of the target filter screen 4, and the key parameters of the filtration-related oil at the outlet of the target filter screen 4 during the second test, a first usage effect evaluation value of each target filter screen 4 is determined; Step 05: Determine the comprehensive usage evaluation value of each target filter 4 based on the first usage effect evaluation value and the second usage effect evaluation value; Step 06: Determine the median of the apertures of the N target filters 4 with the smallest comprehensive utilization evaluation values ​​as the set aperture of the filter 4, and install the filter 4 with the actual aperture being the set aperture of the filter 4 to the current hydraulic station.

[0042] Preferably, the current filter element pore size is determined based on the common impurity particle size distribution of the hydraulic oil of the current hydraulic station, the first impurity particle size is the common impurity particle size of the hydraulic oil of the current hydraulic station that is greater than or equal to the current filter element pore size, and the second impurity particle size is the average value of the common impurity particle size of the hydraulic oil of the current hydraulic station that is smaller than the current filter element pore size.

[0043] Preferably, the first usage effect evaluation value is calculated based on the following formula: ; in, is the first usage effect evaluation value of the j-th target filter 4; is the i-th filter-related oil key parameter of the filter element inlet oil during the first test of the j-th target filter 4; is the key parameter of the ith filter-related oil at the inlet of the target filter 4 during the first test of the jth target filter 4; is the i-th key filtration-related oil parameter at the outlet of the target filter 4 during the first test of the j-th target filter 4; the key filtration-related oil parameters include: any one or more of: oil flow rate, pressure, and oil impurity concentration (which can be (the weight of impurities in a certain volume of oil containing impurities divided by the weight of a certain volume of oil containing impurities); N is the total number of key filtration-related oil parameters; is the evaluation weight of the key parameters of the ith filtration-related oil (the weight corresponding to the oil flow rate and pressure is greater than 0 and less than 1, and the oil impurity concentration can be greater than -1 and less than 0); The second usage effect evaluation value is calculated based on the following formula: ; in is the second usage effect evaluation value of the j-th target filter 4; is the jth filter-related oil key parameter of the filter element inlet oil during the second test of the jth target filter 4; is the jth filter-related oil key parameter at the inlet of the target filter 4 during the second test of the jth target filter 4; is the jth filter-related oil key parameter at the outlet of the target filter 4 during the first test of the jth target filter 4; ; in, is the comprehensive utilization evaluation value of the j-th target filter 4; is the weight of the first usage effect evaluation value (the value is greater than 0 and less than 1); The second usage effect evaluation value weight (the value is greater than 0 and less than 1).

[0044] The beneficial effects of the above technical solution are: The filter element and screen pore size combination is determined based on the common impurity particle size distribution of hydraulic fluid. The first impurity particle size test (≥ the filter element pore size, which is set based on the filtration requirements of the hydraulic station's original filter) evaluates the large particle interception capacity, while the second impurity particle size test (< the filter element pore size) verifies the effect of changes in the filtrate's parameters as it passes through the screen.

[0045] Avoid high pressure loss caused by filter mesh with too small pore size (for example, a 10μm pore size filter increases system energy consumption by 30%).

[0046] Filter performance is quantified using multiple parameters, including flow rate and pressure. Flow rate reflects flow resistance, while pressure reflects energy consumption and clogging risk. This avoids biased decision-making due to a single parameter, enabling filter selection to balance filtration efficiency, energy consumption, and reliability. This is expected to reduce filter replacement costs by 15%-25%.

[0047] Filter pore size: This is determined through the "first pore size range → target first pore size → median optimization" process to ensure compatibility with the filter element and impurity distribution. For example, if the filter element pore size is 25μm, filter pore sizes of 20-30μm are screened and tested, ultimately selecting the median of 24μm as the optimal pore size.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A wind turbine lubrication system filtering protection method, characterized in that: include: A protective filter is installed at the bottom of the filter of the main lubrication system of the wind turbine. The protective filter is placed in the installation hole at the bottom of the lubrication main pump filter to intercept particulate matter accumulated in the original filter cartridge. The installation of the protective filter does not affect the installation and use of the filter element of the original filter.

2. A wind turbine lubrication system filtering and protection method according to claim 1, characterized in that: Installing a protective filter at the bottom of the filter in the main lubrication system of a wind turbine generator set includes: Step 1: Disconnect the gear oil lubrication main pump motor pump group circuit breaker; Step 2: Open the oil drain ball valve of the lubrication main pump filter and collect the oil discharged from the filter cartridge with a clean oil collection box; Step 3: Open the filter cover of the lubrication main pump, wait until the oil at the drain ball valve is completely drained, and then remove the filter element; Step 4: Place the protective filter into the bottom mounting hole of the lubrication main pump filter; Step 5: After the protective filter is installed, reinstall the filter element and restore the unit.

3. A wind turbine lubrication system filtering and protection method according to claim 1, characterized in that: The protective filter is made of 304 material.

4. A wind turbine lubrication system filtering and protection method according to claim 1, characterized in that: The protective filter is commonly used in hydraulic stations of the brands of Telijia, Sanxes and Chuanrun.

5. A wind turbine lubrication system filtering and protection method according to claim 1, characterized in that: The protective filter comprises: A mounting plate (2) is provided with a plurality of frames (3) at intervals along the circumference of the lower end of the mounting plate (2); a filter screen (4) is installed in a mounting hole in the middle of the mounting plate (2), and the bottom of the filter screen (4) is supported on the frames (3).

6. A wind turbine lubrication system filtering and protection method according to claim 5, characterized in that: The upper portion of the mounting hole is chamfered.

7. A wind turbine lubrication system filtering and protection method according to claim 5, characterized in that: A handle (1) is provided on the top of the mounting plate (2).

8. A wind turbine lubrication system filtering and protection method according to claim 1, characterized in that: Also includes: A testing process, the testing process comprising: Step 01: Based on the current filter element pore size, determine the first pore size range of the filter screen (4), and select a number of target first pore sizes from the first pore size range; Step 02: Obtain the common impurity particle size distribution of the hydraulic oil in the current hydraulic station; Step 03: A first test is performed using the hydraulic oil of the current hydraulic station containing the first impurity particle size through a structure in which the initially used filter element is matched with different initially used target filter screens (4), and based on the key parameters of the filtration-related oil at the inlet of the filter element, the key parameters of the filtration-related oil at the inlet of the target filter screen (4), and the key parameters of the filtration-related oil at the outlet of the target filter screen (4) during the first test process, a first use effect evaluation value of each target filter screen (4) is determined, and the pore size of the target filter screen (4) is the target first pore size; Step 04: a second test is performed using the hydraulic oil of the current hydraulic station containing the second impurity particle size through the structure of the initially used filter element and the target filter screens (4) of different initially used combinations, and based on the key parameters of the filtration-related oil at the filter element inlet, the key parameters of the filtration-related oil at the inlet of the target filter screen (4), and the key parameters of the filtration-related oil at the outlet of the target filter screen (4) during the second test process, a first use effect evaluation value of each target filter screen (4) is determined; Step 05: Determine the comprehensive usage evaluation value of each target filter (4) based on the first usage effect evaluation value and the second usage effect evaluation value; Step 06: Determine the median of the apertures of the N target filters (4) with the smallest comprehensive evaluation values ​​as the set aperture of the filter (4), and the filter (4) with the actual aperture being the set aperture of the filter (4) is installed in the current hydraulic station.

9. A wind turbine lubrication system filtering and protection method according to claim 8, characterized in that: The current filter element pore size is determined based on the common impurity particle size distribution of the hydraulic oil of the current hydraulic station. The first impurity particle size is the common impurity particle size of the hydraulic oil of the current hydraulic station that is greater than or equal to the current filter element pore size, and the second impurity particle size is the average value of the common impurity particle size of the hydraulic oil of the current hydraulic station that is smaller than the current filter element pore size.

10. A wind turbine lubrication system filtering and protection method according to claim 8, characterized in that: The first usage effect evaluation value is calculated based on the following formula: ； in, is the first usage effect evaluation value of the j-th target filter (4); is the i-th filter-related oil key parameter of the filter element inlet oil during the first test of the j-th target filter (4); is the i-th filter-related oil key parameter at the inlet of the target filter (4) during the first test of the j-th target filter (4); is the i-th filter-related oil key parameter at the outlet of the target filter (4) during the first test of the j-th target filter (4); the filter-related oil key parameters include: oil flow rate and pressure; N is the total number of filter-related oil key parameters; is the evaluation weight of the key parameters of the ith filter-related oil; The second usage effect evaluation value is calculated based on the following formula: ； in is the second usage effect evaluation value of the j-th target filter (4); is the jth filter-related oil key parameter of the filter element inlet oil during the second test of the jth target filter (4); is the jth filter-related oil key parameter at the inlet of the target filter (4) during the second test of the jth target filter (4); is the jth filter-related oil key parameter at the outlet of the target filter (4) during the first test of the jth target filter (4); ； in, is the comprehensive utilization evaluation value of the jth target filter (4); is the first usage effect evaluation value weight; It is the second usage effect evaluation value weight.

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