Box lubrication fine filter integrated assembly

Abstract

The utility model relates to a box body lubrication fine filter integrated assembly, it includes liquid path a and sets up filter core integrated part and pump body on liquid path a, filter core integrated part includes parallelly connected setting fine filter screen group and filter assembly, filter assembly includes series connection setting rear coarse filter group and front middle filter group, filter core integrated part export connects liquid path d, front middle filter group has bypass check valve in parallel, the utility model discloses reasonable in design, compact structure and convenient to use.

Description

Technical Field

[0001] This utility model relates to an integrated assembly for box lubrication fine filtration, specifically, to a device that integrates a 3μm fine filtration height into an existing wind power thin oil filtration system. Background Technology

[0002] Currently, wind power thin oil lubrication filtration systems generally rely on filter elements with medium or low precision, while high-precision fine filtration systems require additional selection, resulting in the need to reserve installation space and control systems.

[0003] When the filter element fails, it cannot be used and there is no safety redundancy. If a fine filter is used alone, it will increase costs and require frequent replacement. If a traditional coarse filter and fine filter are connected in series, it will increase system resistance and there is still no safety redundancy.

[0004] In addition, current fine filtration systems require separate configurations of motor pump units, filter valve assemblies, and piping assemblies, resulting in high component costs. They also occupy a large space, and the electrical control system requires dedicated space for its control unit. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an integrated lubrication and fine filtration assembly for a housing, which solves the problem of high integration of fine filtration and can filter out most of the impurity particles and water particles larger than 3μm in the oil.

[0006] The integrated lubrication and fine filtration device for the gearbox consists of a filter element, a filter valve block, and connecting blocks. When the wind power lubrication system starts normally, the oil can partially pass through the 3μm fine filter element, achieving deep impurity and moisture filtration.

[0007] To solve the above problems, the technical solution adopted by this utility model is as follows: In order to simplify the filtration system, achieve staged filtration, and increase filtration safety redundancy, a box-type lubrication fine filter integrated assembly is provided, including a liquid path a, a filter element integration part and a pump body disposed on the liquid path a. The filter cartridge integration section includes a fine filter array and a filter assembly arranged in parallel; The filter assembly includes a post-coarse filter group and a pre- and middle filter group arranged in series. Filter element integration section outlet connection liquid path d; The front and middle filter units are connected in parallel with a bypass check valve; A differential pressure collector is installed between the two ends of the filter element integration section to collect the pressure difference between the inlet and outlet of the filter element integration section. The starting pressure of the bypass check valve is greater than the set pressure of the differential pressure collector; The filtration levels of the post-coarse filter group, the pre-medium filter group, and the fine filter group increase sequentially.

[0008] As a further improvement to the above technical solution: To ensure safe operation of the hydraulic circuit, a safety hydraulic circuit is provided at the pump outlet. The system includes hydraulic circuit d, safety hydraulic circuit, and pump body connection housing. The housing is a gearbox.

[0009] A main check valve is installed at the pump outlet to prevent oil backflow.

[0010] A vent joint is installed on liquid line a to prevent negative pressure.

[0011] To achieve fine filtration, there is a liquid path c between the inlet of the pre- and intermediate filter groups and the inlet of the fine filter group; To enable the grading process and avoid prolonged operation of the fine filter, a two-stage check valve is installed on liquid path c.

[0012] To enable emergency filtration, the inlet of the fine filter assembly is also connected to liquid path b; Both the inlets of fluid lines a and b are connected to directional control valve A. Directional control valve A is a two-position, three-way solenoid directional control valve.

[0013] The inlet of directional valve A is connected to the outlet of the pump body.

[0014] A main check valve is installed between the inlet of directional valve A and the outlet of the pump body.

[0015] The reversing valve A is electrically connected to the differential pressure acquisition device, thereby converting the pressure signal into an electrical signal.

[0016] This invention integrates a 3μm filter element with other grades of filter elements into the filter cartridge for parallel use. The pressure difference generated by the system itself enables fine filtration of part of the oil, achieving deep cleaning of some oil impurities and moisture.

[0017] This invention achieves filter safety redundancy and enables multi-stage combined use, thereby addressing the technical problem of unusable filters due to main filter failure or replacement.

[0018] This invention saves on parts and electrical control costs, as well as installation space. By directly integrating 3μm fine filtration into the existing filter cartridge, this device reduces the need for motor pump units, filter cartridges, piping assemblies, and electrical components compared to current common solutions.

[0019] This utility model is reasonably designed, low in cost, sturdy and durable, safe and reliable, simple to operate, time-saving and labor-saving, cost-saving, compact in structure and easy to use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the hydraulic principle of this utility model.

[0021] Figure 2This is a schematic diagram of a modified embodiment of the hydraulic principle of this utility model.

[0022] Figure 3 This is a schematic diagram of an embodiment of the hydraulic principle of this utility model.

[0023] The components include: 1. Differential pressure sensor; 2. Fine filter assembly; 3. Safety fluid circuit; 4. Housing; 5. Pump body; 6. Main check valve; 7. Vent connector; 8. Filter assembly; 9. Post-coarse filter assembly; 10. Pre- and intermediate filter assembly; 11. Bypass check valve; 12. Secondary check valve; 13. Directional valve A; 14. Solenoid valve B; 15. Throttling valve. Detailed Implementation

[0024] like Figure 1-3 As shown, the integrated lubrication and filtration assembly of this embodiment includes a liquid path a, a filter element integration part disposed on the liquid path a, and a pump body 5; to achieve basic circulation filtration.

[0025] As an improvement, the filter element integration section includes a fine filter screen group 2 and a filter element 8 arranged in parallel; it cleverly utilizes the pressure at the filter element inlet to adsorb impurities in the oil at the fine filter. The more the filter element is used, the more impurities accumulate in it, and the greater the inlet pressure becomes. At the same time, under this pressure, more impurities enter the fine filter. Its design is very ingenious.

[0026] The filter assembly 8 includes a rear coarse filter group 9 and a front-middle filter group 10 arranged in series. The ingenious part is that the coarse filter is placed after the middle filter instead of before it. Thus, during operation, the middle filter is the main filter and the coarse filter is a backup. With the help of the bypass check valve 11, the pressure is set so that if the middle filter fails, it can be automatically avoided and can still work normally until the middle filter is replaced.

[0027] Filter element integration section outlet connection liquid path d; The front and middle filter groups 10 are connected in parallel with a bypass check valve 11; A differential pressure collector 1 is installed between the two ends of the filter element integration section to collect the pressure difference between the inlet and outlet of the filter element integration section. The starting pressure of the bypass check valve 11 is greater than the set pressure of the differential pressure collector 1; it achieves emergency notification through alarm / SMS notification.

[0028] like Figure 2 As a preferred embodiment, the starting pressure of the secondary check valve 12 is less than the set pressure of the differential pressure collector 1, so that it does not work when the pressure is smooth, and only opens for filtration when the pressure is high or when pulsation occurs, and at the same time, it does not produce an alarm.

[0029] The filtration levels of the post-coarse filter group 9, the pre-medium filter group 10, and the fine filter group 2 increase sequentially and are reasonably allocated. This ensures normal operation, achieves fine filtration, and provides safe redundancy filtration, meaning that if a problem occurs during normal operation, filtration can be performed.

[0030] Pump body 5 outlet bypass has a safety fluid line 3; Liquid circuit d, safety liquid circuit 3, and pump body 5 are connected to housing 4.

[0031] A main check valve 6 is installed at the outlet of pump body 5 to prevent backflow.

[0032] A vent joint 7 is installed on liquid line a to balance the pressure.

[0033] There is a liquid path c between the inlet of the front and middle filter group 10 and the inlet of the fine filter group 2; A two-stage check valve 12 is installed on liquid circuit c, so that it only starts working after the main liquid circuit is pressurized. At the beginning, it does not need to work and runs empty. Then it works normally. It does not need to work at the beginning. Only after the system has been running for a period of time and cavitation, wear, etc. occur will it start fine filtration. This is perfectly suitable for the working conditions. When the temporary reversing valve A switches to liquid circuit b, the fine filter element works temporarily. Due to the existence of the two-stage check valve, it will not affect its operation, thus simplifying the liquid circuit.

[0034] exist Figure 2 In this example, the inlets of liquid lines a and b are both connected to directional valves A13; Pump body 5 is a variable pump; A throttle valve 15 is installed on liquid line b; The inlet of the fine filter assembly 2 is also connected to liquid path b; Under normal circumstances, liquid path a works. When the coarse filter and the medium filter both malfunction, the flow is switched and the fine filter works temporarily. The pump body pressurizes and forces filtration, which can also achieve filtration without stopping the machine. The coarse filter and the medium filter on liquid path a can be replaced. At the same time, switching is achieved through reversing valve A13, thereby increasing... Figure 1 The pressure at the inlet end of the fine filter mesh group 2 in the middle is adjusted so that the fine filter not only performs adsorption and filtration at the inlet end, but also promotes the impurities adsorbed at the end to the middle and rear ends, thereby making full use of the fine filter mesh core.

[0035] To solve the problem of mismatch in fine filtration flow, pump body 5 can be a variable pump, which can be a multi-stage frequency converter; To reduce the direct impact on the filter element, a throttle valve 15 is installed on liquid path b to match the flow rate corresponding to the fine filter element. The flow rate corresponding to the fine filter group 2 is small. Since a variable pump is used, and the fine filter only fails when both the medium and coarse filter elements fail, requiring an emergency filtration solution, it can be achieved by using a variable pump. Of course, an overflow valve can also be equipped.

[0036] The inlet of the reversing valve A13 is connected to the outlet of the pump body 5.

[0037] A main check valve 6 is installed between the inlet of the reversing valve A13 and the outlet of the pump body 5.

[0038] The reversing valve A13 is electrically connected to the differential pressure acquisition device 1.

[0039] exist Figure 3 In one embodiment, a solenoid valve 14 is connected in series on the fine filter group 2; thereby enabling the liquid circuit to be opened and closed according to the working conditions, thus realizing the timed operation of the fine filter and reducing its replacement rate and usage rate.

[0040] like Figure 1 Pump body 5 draws oil from tank 4. After passing through main check valve 6 (either before or after overflow valve 3), the oil passes through filter element 8 (10μm / 50μm) and fine filter screen group 2 (3μm). The filtered oil returns to tank 4. Vent joint 7 is used to remove air from the oil. Safety fluid circuit 3 acts as a safety valve to control system pressure.

[0041] Differential pressure acquisition device 1 (or two pressure sensors, differential pressure acquisition device, comparator or electronic pressure gauge, etc.) is used to detect the pressure difference before and after the filter element. When the pressure difference reaches a certain value, an alarm signal is issued to prompt the filter element to be replaced.

[0042] This utility model is described in detail for the purpose of making the disclosure clearer, and the prior art will not be listed one by one.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model 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 of the technical features. It is obvious to those skilled in the art that multiple technical solutions of this utility model can be combined. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model. All technical contents not described in detail in this utility model are publicly known technologies.

Claims

1. A housing lubrication and fine filter integrated assembly, characterized in that: Includes liquid path a, filter element integration unit and pump body installed on liquid path a (5); The filter element integration unit includes a fine filter screen group (2) and a filter assembly (8) arranged in parallel. The filter assembly (8) includes a post coarse filter group (9) and a pre-middle filter group (10) arranged in series. Filter element integration section outlet connection liquid path d; The front and middle filter group (10) is connected in parallel with a bypass check valve (11).

2. The integrated assembly for box lubrication and fine filtration according to claim 1, characterized in that: A differential pressure collector (1) is installed between the two ends of the filter element integration section to collect the pressure difference between the inlet and outlet of the filter element integration section. The starting pressure of the bypass check valve (11) is greater than the set pressure of the differential pressure collector (1); The filtration levels of the post coarse filter group (9), the pre-middle filter group (10), and the fine filter group (2) increase sequentially. The pump body (5) has a safety fluid circuit (3) bypassing the outlet; The liquid circuit d, the safety liquid circuit (3) and the pump body (5) are connected to the housing (4).

3. The integrated assembly for box lubrication and fine filtration according to claim 1, characterized in that: A main check valve (6) is installed at the outlet of the pump body (5).

4. The integrated assembly for box lubrication and fine filtration according to claim 1, characterized in that: A vent joint (7) is provided on liquid path a.

5. The integrated assembly for housing lubrication and fine filtration according to any one of claims 1-4, characterized in that: There is a liquid path c between the inlet of the front and middle filter group (10) and the inlet of the fine filter group (2); A two-stage check valve (12) is installed on liquid circuit c; The starting pressure of the secondary check valve (12) is less than the set pressure of the differential pressure collector (1).

6. The integrated assembly for box lubrication and fine filtration according to claim 5, characterized in that: The inlet of the fine filter assembly (2) is also connected to liquid path b; The inlets of liquid lines a and b are both connected to directional valve A (13); Pump body (5) is a variable pump; A throttle valve (15) is installed on liquid line b.

7. The integrated assembly for box lubrication and fine filtration according to claim 6, characterized in that: The inlet of the reversing valve A (13) is connected to the outlet of the pump body (5).

8. The integrated assembly for box lubrication and fine filtration according to claim 7, characterized in that: A main check valve (6) is installed between the inlet of the reversing valve A (13) and the outlet of the pump body (5).

9. The integrated assembly for box lubrication and fine filtration according to claim 7, characterized in that: The reversing valve A (13) is electrically connected to the differential pressure collector (1).

10. The integrated assembly for box lubrication and fine filtration according to claim 1, characterized in that: A solenoid valve (14) is connected in series on the fine filter group (2).

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