Gear box thin oil filtering device
By designing an integrated gearbox thin oil filtration device, the problem of large installation space and easy damage of the filter device in wind turbines is solved, achieving a compact structure, high reliability, and adapting to the cleaning and filtration requirements of large megawatt-level lubricating oil.
Patent Information
- Application Number
- CN202421283980.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-06-06
AI Technical Summary
In the gearbox lubrication system of wind turbine generator sets, the existing filter devices have large installation space and are prone to damage, resulting in increased maintenance costs and difficult to meet the needs of the large megawatt level.
A gearbox thin oil filtering device is designed, which achieves compact structure and space saving by integrating the filter and integrated valve block. This device integrates the oil inlet, oil outlet, temperature control valve and other components on the integrated valve block, and connects the exhaust port through the air channel, reducing the external space occupied.
It improves the integration and reliability of the device, reduces installation space requirements and maintenance costs, and adapts to the large megawatt-level lubricating oil cleaning and filtration requirements.
Smart Images
Figure CN222377182U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of lubrication of a gear box of a wind power generator set, and particularly relates to a gear box thin oil filtering device. Background Art
[0002] In the lubrication system of the gearbox of a wind turbine generator set, the filter device plays a role in filtering and cleaning the lubricating oil circulating inside the gearbox, and is an important component in the lubrication system of the wind turbine gearbox. In recent years, the megawatt level of wind turbines has developed towards large megawatts, and the flow rate of the gearbox lubrication system has increased, which has increased the total mass of the lubrication system products and the required installation space, which is inconsistent with the reduction of the internal space of the cabin. At the same time, in actual use, the exhaust pipe of the filter device is often damaged, which leads to increased maintenance costs. Utility Model Content
[0003] The utility model provides a gear box thin oil filtering device to overcome the defects of the prior art, which can improve integration and reliability.
[0004] The purpose of the utility model is achieved through the following technical solutions:
[0005] A gearbox oil filtering device, comprising:
[0006] The filter has a filter chamber disposed therein, and the lower portion of the filter has an exhaust port connected to the upper end of the filter chamber;
[0007] An integrated valve block, the integrated valve block is arranged at the lower end of the filter, and is provided with a first temperature-controlled three-way regulating valve, a second temperature-controlled three-way regulating valve, two oil inlets, two first oil outlets and two second oil outlets, the two oil inlets are both connected to the inlet of the filter chamber, the inlets of the first temperature-controlled three-way regulating valve and the second temperature-controlled three-way regulating valve are both connected to the outlet of the filter chamber, the first outlets of the first temperature-controlled three-way regulating valve and the second temperature-controlled three-way regulating valve are both connected to the gear box through the two first oil outlets, the second outlets of the first temperature-controlled three-way regulating valve and the second temperature-controlled three-way regulating valve are both connected to the cooler through the two second oil outlets, and the temperature detection ends of the first temperature-controlled three-way regulating valve and the second temperature-controlled three-way regulating valve are respectively connected to the inlets of the first temperature-controlled three-way regulating valve and the second temperature-controlled three-way regulating valve;
[0008] The exhaust port is connected to any first oil outlet, and the output end of the cooler is connected to the gear box.
[0009] In one embodiment, two oil inlets are respectively arranged at the front end and the rear end of the integrated valve block, two first oil outlets are both arranged at the right end of the integrated valve block, two second oil outlets are both arranged at the left end of the integrated valve block, the first temperature-controlled three-way regulating valve and the second temperature-controlled three-way regulating valve are both arranged at the front end of the integrated valve block, and the first temperature-controlled three-way regulating valve and the second temperature-controlled three-way regulating valve are respectively located on the left and right sides of the oil inlet.
[0010] The beneficial effects of adopting the above technical solution are: two oil inlets, two first oil outlets, two second oil outlets, a first temperature-controlled three-way regulating valve and a second temperature-controlled three-way regulating valve are reasonably arranged on the integrated valve block, so that the integrated valve block can be connected to the gearbox through the same end and can also be connected to the cooler through the same end, thereby facilitating the layout of external pipelines and further helping to further improve the degree of integration.
[0011] In one embodiment, two one-way valves are disposed at the lower portion of the integrated valve block, and the input ends and output ends of the two one-way valves are respectively connected to the oil inlet and the inlet of the filter chamber.
[0012] The beneficial effect of adopting the above technical solution is: a one-way valve is provided to prevent the lubricating oil from flowing back to impact the pump while buffering the impact of the lubricating oil on the filter element.
[0013] In one embodiment, the filter includes a cylinder with a filter chamber, a first cover plate sealedly connected to the lower end of the cylinder, and a second cover plate sealedly connected to the upper end of the cylinder, a filter element is arranged in the filter chamber, and an air duct is arranged on the cylinder for connecting the inner side of the second cover plate and the exhaust port.
[0014] The beneficial effects of adopting the above technical solution are: the cylinder, the first cover and the second cover are assembled to form a closed filter; the inner side of the second cover and the exhaust port are connected through the airway in the cylinder to reduce the external space occupied.
[0015] In one embodiment, the integrated valve block is an aluminum cast valve block, the cylinder is an aluminum refrigeration drawn cylinder, the first cover plate is a carbon steel plate, and the second cover plate is an aluminum cast plate.
[0016] The beneficial effect of adopting the above technical solution is: such an arrangement can reduce the mass, thereby facilitating the lightweighting of the product.
[0017] In one embodiment, the first temperature-controlled three-way regulating valve includes a first three-way regulating valve and a first temperature-sensitive bag for sensing the temperature of the lubricating oil in the first three-way regulating valve, and the first temperature-sensitive bag acts on the valve core in the first three-way regulating valve. The second temperature-controlled three-way regulating valve includes a second three-way regulating valve and a second temperature-sensitive bag for sensing the temperature of the lubricating oil in the second three-way regulating valve, and the second temperature-sensitive bag acts on the valve core in the second three-way regulating valve.
[0018] The beneficial effects of adopting the above technical solution are as follows: the first temperature-sensing package is affected by the temperature rise of the lubricating oil in the first three-way regulating valve, and will expand to act on the valve core in the first three-way regulating valve, thereby realizing the state adjustment of the first three-way regulating valve; the second temperature-sensing package is affected by the temperature rise of the lubricating oil in the second three-way regulating valve, and will expand to act on the valve core in the second three-way regulating valve, thereby realizing the state adjustment of the second three-way regulating valve; by adjusting the states of the first three-way regulating valve and the second three-way regulating valve, it is convenient to allow the lubricating oil to enter the cooler through the two second oil outlets and then be discharged into the gear box when the temperature of the lubricating oil is high.
[0019] In one embodiment, a differential pressure transmitter is provided on the integrated valve block, and two detection ends of the differential pressure transmitter are respectively connected to the inlet and the outlet of the filter chamber.
[0020] The beneficial effect of adopting the above technical solution is that the two detection ends of the pressure difference transmitter are respectively connected to the inlet and outlet of the filter chamber to send out an electrical signal when the pressure difference between the inlet and outlet of the filter chamber is large, thereby reminding to replace the filter element.
[0021] In one embodiment, two first connectors for installing a pressure gauge are provided on the integrated valve block, and the inner sides of the two first connectors are respectively connected to the inlet and the outlet of the filter chamber.
[0022] The beneficial effect of adopting the above technical solution is that after the pressure gauge is connected to the first joint, the pressure at the inlet and the pressure at the outlet of the filter chamber can be measured by the pressure gauge.
[0023] In one embodiment, two second connectors for installing a particle counter are provided on the integrated valve block, and the inner sides of the two second connectors are respectively connected to the inlet and the outlet of the filter chamber.
[0024] The beneficial effect of adopting the above technical solution is that after the particle counter is connected to the second joint, the cleanliness of the lubricating oil at the inlet and outlet of the filter chamber can be measured by the particle counter.
[0025] In one embodiment, a sewage ball valve communicating with the upper inlet of the filter chamber is disposed at the lower portion of the integrated valve block.
[0026] The beneficial effect of adopting the above technical solution is that after the sewage ball valve is opened, the dirt filtered by the filter element in the filter chamber and the dirt that may exist in the integrated valve block can be easily discharged.
[0027] The beneficial effects of the utility model are:
[0028] The utility model integrates the oil inlet, the first oil outlet, the second oil outlet, the first temperature-controlled three-way regulating valve and the second temperature-controlled three-way regulating valve and other components or structures into an integrated valve block, and then installs them on the filter, so that the structure is more compact and the required installation space is smaller, which is beneficial to improving the integration of the product; in addition, the gas discharged from the exhaust port can be discharged into the gear through the first oil outlet and then discharged, rather than being directly discharged after being connected to the gear box through the exhaust pipe, which is beneficial to reducing the damage of the exhaust pipe due to the vibration of the gear box, thereby helping to improve the reliability of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.
[0030] in:
[0031] Figure 1 A schematic structural diagram of an embodiment of the utility model is shown;
[0032] Figure 2 The schematic diagram of the utility model is shown;
[0033] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale.
[0034] Reference numerals:
[0035] 1-cylinder, 2-integrated valve block, 3-second oil outlet, 4-second temperature-controlled three-way regulating valve, 5-check valve, 6-drain ball valve, 7-pressure differential transmitter, 8-oil inlet, 9-first temperature-controlled three-way regulating valve, 10-first cover plate, 11-hose, 12-exhaust port, 13-second cover plate, 14-filter, 15-first oil outlet. DETAILED DESCRIPTION
[0036] The utility model will be further described below in conjunction with the accompanying drawings.
[0037] The utility model provides a gear box oil filter device, such as Figure 1 and Figure 2 As shown, including:
[0038] A filter 14, wherein a filter chamber is disposed in the filter 14, and an exhaust port 12 communicating with an upper end of the filter chamber is disposed at a lower portion of the filter 14;
[0039] An integrated valve block 2, the integrated valve block 2 is arranged at the lower end of the filter 14, and is provided with a first temperature-controlled three-way regulating valve 9, a second temperature-controlled three-way regulating valve 4, two oil inlets 8, two first oil outlets 15 and two second oil outlets 3, the two oil inlets 8 are both connected to the inlet of the filter chamber, the inlets of the first temperature-controlled three-way regulating valve 9 and the second temperature-controlled three-way regulating valve 4 are both connected to the outlet of the filter chamber, the first outlets of the first temperature-controlled three-way regulating valve 9 and the second temperature-controlled three-way regulating valve 4 are both connected to the gear box through the two first oil outlets 15, the second outlets of the first temperature-controlled three-way regulating valve 9 and the second temperature-controlled three-way regulating valve 4 are both connected to the cooler through the two second oil outlets 3, and the temperature detection ends of the first temperature-controlled three-way regulating valve 9 and the second temperature-controlled three-way regulating valve 4 are respectively connected to the inlets of the first temperature-controlled three-way regulating valve 9 and the second temperature-controlled three-way regulating valve 4;
[0040] The exhaust port 12 is connected to any first oil outlet 15, and the output end of the cooler is connected to the gear box.
[0041] It can be understood that the utility model integrates the components or structures such as the oil inlet 8, the first oil outlet 15, the second oil outlet 3, the first temperature-controlled three-way regulating valve 9 and the second temperature-controlled three-way regulating valve 4 into the integrated valve block 2, and then installs them on the filter 14 to make the structure more compact and the required installation space smaller, which is beneficial to improve the integration of the product; in addition, the gas discharged from the exhaust port 12 can be discharged into the gear through the first oil outlet 15 and then discharged, rather than being directly discharged through the exhaust pipe connected to the gear box, which is beneficial to reduce the damage of the exhaust pipe due to the vibration of the gear box, thereby helping to improve the reliability of the product.
[0042] In one embodiment, two oil inlets 8 are respectively arranged at the front end and the rear end of the integrated valve block 2, two first oil outlets 15 are both arranged at the right end of the integrated valve block 2, two second oil outlets 3 are both arranged at the left end of the integrated valve block 2, the first temperature-controlled three-way regulating valve 9 and the second temperature-controlled three-way regulating valve 4 are both arranged at the front end of the integrated valve block 2, and the first temperature-controlled three-way regulating valve 9 and the second temperature-controlled three-way regulating valve 4 are respectively located on the left and right sides of the oil inlet 8.
[0043] It can be understood that the two oil inlets 8, the two first oil outlets 15, the two second oil outlets 3, the first temperature-controlled three-way regulating valve 9 and the second temperature-controlled three-way regulating valve 4 are reasonably arranged on the integrated valve block 2 so that the integrated valve block 2 can be connected to the gearbox through the same end and can also be connected to the cooler through the same end, thereby facilitating the layout of external pipelines and further helping to further improve the degree of integration.
[0044] It should be noted that the interiors of the two first oil outlets 15 are connected, and the interiors of the two second oil outlets 3 are connected; two oil inlets 8 are provided to facilitate multi-port oil inlet; the two oil inlets 8 are respectively located at the front end and the rear end of the integrated valve block 2 to facilitate the series connection of multiple filters 14 through the integrated valve block 2.
[0045] In one embodiment, two one-way valves 5 are disposed at the lower portion of the integrated valve block 2 , and the input ends and output ends of the two one-way valves 5 are respectively connected to the oil inlet 8 and the inlet of the filter chamber.
[0046] It can be understood that the one-way valve 5 is provided to prevent the lubricating oil from flowing back to impact the pump and to buffer the impact of the lubricating oil on the filter element.
[0047] It should be noted that the two one-way valves 5 are respectively located at the lower ends of the two filter elements, and the one-way valves 5 are connected to the integrated valve block 2 by means of threaded connection.
[0048] In one embodiment, the filter 14 includes a barrel 1 provided with a filter chamber, a first cover plate 10 sealed to the lower end of the barrel 1, and a second cover plate 13 sealed to the upper end of the barrel 1, two filter elements are arranged in the filter chamber, and an air duct is arranged on the barrel 1 for connecting the inner side of the second cover plate 13 and the exhaust port 12.
[0049] It can be understood that the cylinder 1, the first cover and the second cover are assembled to form a closed filter 14; the inner side of the second cover 13 and the exhaust port 12 are connected through the airway in the cylinder 1 to reduce the external space occupation.
[0050] It should be noted that the top of the second cover plate 13 is a dome structure. After the air gathers at the top, it can be discharged from the internal air duct of the cylinder 1 to the exhaust port 12. At the same time, the exhaust port 12 can be connected to the first oil outlet 15 through the hose 11 to achieve self-exhaust; in addition, a mounting hole is provided on the center line of the rear end of the cylinder 1 to facilitate lightweight installation of the product.
[0051] In one embodiment, the integrated valve block 2 is an aluminum cast valve block, the cylinder 1 is an aluminum cold-drawn cylinder, the first cover plate 10 is a carbon steel plate, and the second cover plate 13 is an aluminum cast plate.
[0052] It can be understood that such a configuration is used to reduce the mass, thereby facilitating lightweighting of the product.
[0053] In one embodiment, the first temperature-controlled three-way regulating valve 9 includes a first three-way regulating valve and a first temperature-sensing bag for sensing the temperature of the lubricating oil in the first three-way regulating valve, and the first temperature-sensing bag acts on the valve core in the first three-way regulating valve. The second temperature-controlled three-way regulating valve 4 includes a second three-way regulating valve and a second temperature-sensing bag for sensing the temperature of the lubricating oil in the second three-way regulating valve, and the second temperature-sensing bag acts on the valve core in the second three-way regulating valve.
[0054] It can be understood that the first temperature-sensing package will expand due to the temperature rise of the lubricating oil in the first three-way regulating valve, so as to act on the valve core in the first three-way regulating valve, thereby realizing the state adjustment of the first three-way regulating valve; the second temperature-sensing package will expand due to the temperature rise of the lubricating oil in the second three-way regulating valve, so as to act on the valve core in the second three-way regulating valve, thereby realizing the state adjustment of the second three-way regulating valve; by adjusting the states of the first three-way regulating valve and the second three-way regulating valve, it is convenient to allow the lubricating oil to enter the cooler through the two second oil outlets 3 and then be discharged into the gear box when the temperature of the lubricating oil is high.
[0055] It should be noted that temperature-sensitive materials are arranged in the first temperature sensing package and the second temperature sensing package, and the first temperature sensing package and the second temperature sensing package can indirectly act on the valve cores in the first three-way regulating valve and the second three-way regulating valve respectively through the springs in the first three-way regulating valve and the second three-way regulating valve.
[0056] Specifically, when the detected lubricating oil temperature is less than 45°C, the outlet of the first electric three-way regulating valve is connected to its first outlet and second outlet, and the outlet of the second electric three-way regulating valve is connected to its first outlet and second outlet, that is, the lubricating oil enters the gear box through the two first oil outlets 15, and also enters the cooler through the two second oil outlets 3; when the temperature is not less than 45°C, the first electric three-way regulating valve and the second electric three-way regulating valve start to operate, so that the flow rate from the outlet of the first electric three-way regulating valve to the first outlet gradually decreases until it tends to be completely closed, and at the same time, the flow rate from the outlet of the second electric three-way regulating valve to the first outlet gradually decreases until it tends to be completely closed, so that the lubricating oil enters the cooler from the second outlets of the first electric three-way regulating valve and the second electric three-way regulating valve for cooling and then enters the gear box.
[0057] In one embodiment, a differential pressure transmitter 7 is provided on the integrated valve block 2, and two detection ends of the differential pressure transmitter 7 are respectively connected to the inlet and outlet of the filter chamber; two pressure gauges are provided on the integrated valve block 2, and the detection ends of the two pressure gauges are respectively connected to the inlet and outlet of the filter chamber; two particle counters are provided on the integrated valve block 2, and the detection ends of the two particle counters are respectively connected to the inlet and outlet of the filter chamber.
[0058] It can be understood that the two detection ends of the pressure difference transmitter 7 are respectively connected to the inlet and outlet of the filter chamber to send out an electrical signal when the pressure difference between the inlet and outlet of the filter chamber is large, thereby reminding to replace the filter element; the integrated valve block 2 is provided with two first connectors for installing a pressure gauge, and the inner sides of the two first connectors are respectively connected to the inlet and outlet of the filter chamber, that is, after the pressure gauge is connected to the first connector, the pressure at the inlet and outlet of the filter chamber can be measured by the pressure gauge; the integrated valve block 2 is provided with two second connectors for installing a particle counter, and the inner sides of the two second connectors are respectively connected to the inlet and outlet of the filter chamber, that is, after the particle counter is connected to the second connector, the cleanliness of the lubricating oil at the inlet and outlet of the filter chamber can be measured by the particle counter.
[0059] In one embodiment, a sewage ball valve 6 communicating with the upper inlet of the filter chamber is disposed at the lower portion of the integrated valve block 2 .
[0060] It can be understood that after the sewage ball valve 6 is opened, the dirt filtered by the filter element in the filter chamber and the dirt that may exist in the integrated valve block 2 can be easily discharged.
[0061] In summary, the utility model considers the requirements of low cost, low weight and small installation space for products through different processing techniques;
[0062] The utility model integrates the one-way valve 5, the first temperature-controlled three-way regulating valve 9, the second temperature-controlled three-way regulating valve 4 and the filter 14 on the same integrated valve block 2, and connects the exhaust port 12 of the filter 14 with the first oil outlet 15, so that the entire filtering device has a more compact structure, requires less space, and has high reliability and stability, thereby reducing the subsequent maintenance cost;
[0063] The filter 14 and the integrated valve block 2 of the utility model are made of aluminum alloy as a whole, and the flow channel structure is designed to avoid a large pressure loss under the operation condition of the gearbox, so as to make the lubricating oil flow more efficient;
[0064] The utility model can adapt to different oil inlet and outlet positions of wind power gearboxes, and can be connected in series through existing structures to be compatible with the cleaning and filtration requirements of lubricating oil at a larger megawatt level.
[0065] In the description of the present invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0066] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments, and other arrangements may be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the features described in the various dependent claims and herein may be combined in a manner different from that described in the original claims. It may also be understood that the features described in conjunction with the individual embodiments may be used in other described embodiments.
Claims
1. A gearbox oil filter device, characterized in that: include: A filter (14), wherein a filter chamber is provided in the filter (14), and an exhaust port (12) communicating with an upper end of the filter chamber is provided at a lower portion of the filter (14); An integrated valve block (2), the integrated valve block (2) being arranged at the lower end of the filter (14), the integrated valve block (2) being provided with a first temperature-controlled three-way regulating valve (9), a second temperature-controlled three-way regulating valve (4), two oil inlets (8), two first oil outlets (15) and two second oil outlets (3), the two oil inlets (8) being communicated with the inlet of the filter chamber, the inlets of the first temperature-controlled three-way regulating valve (9) and the second temperature-controlled three-way regulating valve (4) being communicated with the outlet of the filter chamber, and the first temperature-controlled three-way regulating valve (9) and the second temperature-controlled three-way regulating valve (4) being communicated with the outlet of the filter chamber. The first outlets of the first temperature-control three-way regulating valve (9) and the second temperature-control three-way regulating valve (4) are both connected to the gear box through the two first oil outlets (15); the second outlets of the first temperature-control three-way regulating valve (9) and the second temperature-control three-way regulating valve (4) are both connected to the cooler through the two second oil outlets (3); the temperature detection ends of the first temperature-control three-way regulating valve (9) and the second temperature-control three-way regulating valve (4) are respectively connected to the inlets of the first temperature-control three-way regulating valve (9) and the second temperature-control three-way regulating valve (4); Wherein, the exhaust port (12) is connected to any one of the first oil outlets (15), and the output end of the cooler is connected to the gear box.
2. A gearbox oil filter device according to claim 1, characterized in that: The two oil inlets (8) are respectively arranged at the front end and the rear end of the integrated valve block (2); the two first oil outlets (15) are both arranged at the right end of the integrated valve block (2); the two second oil outlets (3) are both arranged at the left end of the integrated valve block (2); the first temperature-controlled three-way regulating valve (9) and the second temperature-controlled three-way regulating valve (4) are both arranged at the front end of the integrated valve block (2); the first temperature-controlled three-way regulating valve (9) and the second temperature-controlled three-way regulating valve (4) are respectively located on the left and right sides of the oil inlet (8).
3. A gearbox oil filter device according to claim 1 or 2, characterized in that: Two one-way valves (5) are arranged at the lower part of the integrated valve block (2), and the input end and the output end of the two one-way valves (5) are respectively connected to the oil inlet (8) and the inlet of the filter chamber.
4. The gearbox oil filter device according to claim 1, characterized in that: The filter (14) comprises a barrel (1) provided with the filter chamber, a first cover plate (10) sealedly connected to the lower end of the barrel (1), and a second cover plate (13) sealedly connected to the upper end of the barrel (1), a filter element is provided in the filter chamber, and an air passage for connecting the inner side of the second cover plate (13) and the exhaust port (12) is provided on the barrel (1).
5. A gearbox oil filtering device according to claim 4, characterized in that: The integrated valve block (2) is an aluminum cast valve block, the cylinder (1) is an aluminum refrigeration drawn cylinder, the first cover plate (10) is a carbon steel plate, and the second cover plate (13) is an aluminum cast plate.
6. The gearbox oil filtering device according to claim 1, characterized in that: The first temperature-controlled three-way regulating valve (9) comprises a first three-way regulating valve and a first temperature-sensing package for sensing the temperature of the lubricating oil in the first three-way regulating valve, wherein the first temperature-sensing package acts on a valve core in the first three-way regulating valve. The second temperature-controlled three-way regulating valve (4) comprises a second three-way regulating valve and a second temperature-sensing package for sensing the temperature of the lubricating oil in the second three-way regulating valve, wherein the second temperature-sensing package acts on a valve core in the second three-way regulating valve.
7. The gearbox oil filtering device according to claim 1, characterized in that: The integrated valve block (2) is provided with a differential pressure transmitter (7), and two detection ends of the differential pressure transmitter (7) are respectively connected to the inlet and the outlet of the filter chamber.
8. The gearbox oil filtering device according to claim 1, characterized in that: The integrated valve block (2) is provided with two first connectors for installing a pressure gauge, and the inner sides of the two first connectors are respectively connected to the inlet and the outlet of the filter chamber.
9. The gearbox oil filter device according to claim 1, characterized in that: The integrated valve block (2) is provided with two second connectors for installing a particle counter, and the inner sides of the two second connectors are respectively connected to the inlet and the outlet of the filter chamber.
10. The gearbox oil filtering device according to claim 1, characterized in that: The lower part of the integrated valve block (2) is provided with a sewage discharge ball valve (6) which is in communication with the upper inlet of the filter chamber.