Rail transit gearbox lubricating oil self-cleaning filtration system and method

Abstract

The application relates to the technical field of gearboxes, in particular to a rail transit gearbox lubricating oil self-cleaning filtering system and method, wherein the rail transit gearbox lubricating oil self-cleaning filtering system comprises a shell, an input shaft, an output shaft and a first connecting shell are installed on the shell, a first gear is installed on the output shaft, a second gear is installed on the input shaft, the first gear and the second gear are in meshing connection, a first bearing and a second bearing are installed in the shell, sealing covers are installed on the input shaft and the output shaft, a first connecting plate and a second connecting plate are installed in the shell, a filtering assembly is arranged on the side surface of the shell, and an adjusting assembly is installed in the filtering assembly. The self-cleaning filtering system solves the problems that the existing splashing lubrication and magnetic screw plug schemes cannot filter non-magnetic impurities, lubricating oil pollution is accelerated, bearings and gears are abnormally worn, the oil replacement period is short and the maintenance cost is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gearboxes, in particular to a rail transit gearbox lubricating oil self-cleaning filtration system and method. BACKGROUND

[0002] The rail transit gearbox is a core transmission device in the rail transit system, and is widely used in various types of rail vehicles such as electric locomotives, motor trains and subways. The gearbox is mainly responsible for transmitting the power generated by the motor to the wheels through a series of gears and shafting structures, thereby driving the vehicle to run. Under the working conditions of high speed and high load, the performance requirements of the gearbox are particularly strict, and it is necessary to ensure the transmission efficiency while improving the reliability, durability and maintenance convenience.

[0003] To this end, some new technical solutions are applied in the development of rail transit gearboxes, such as the use of splash lubrication technology to ensure the lubrication effect of the gearbox at high speed, the use of magnetic screw plug technology to adsorb ferromagnetic wear particles in the lubricating oil, and the use of NAS cleanliness level to measure the degree of oil particle pollution, MTBF average failure interval time to measure the reliability of bearings, and multi-stage composite filter element technology to filter large particle impurities, fine particles and oil sludge, and ferromagnetic particles. However, the existing gearboxes still have some problems, such as the inability of traditional splash lubrication and magnetic screw plug schemes to filter non-magnetic impurities, which leads to accelerated lubricating oil pollution, abnormal wear of bearings and gears, short oil change cycle (120,000 km) and high maintenance cost.

[0004] CN107806507B discloses a cooling device for a gearbox in a rail transit vehicle, which includes a vehicle body placed on a track, a gearbox transmission mechanism arranged in the vehicle body, a gearbox arranged in the gearbox transmission mechanism, an automatic heat absorption cooling mechanism arranged in the vehicle body, a temperature sensor arranged in the automatic heat absorption cooling mechanism, an automatic heat dissipation cooling mechanism arranged outside the gearbox, and a heat dissipation box, a blower and a protective filter screen arranged in the automatic heat dissipation cooling mechanism. Although the above device can realize the functions of cooling and filtering gas, it cannot filter the oil in the gearbox, cannot perform layered filtration and adjust the filtration performance of the device, and cannot use the pressure of splash fluid to dredge the filter screen and lubricate the bearings of the input shaft and the output shaft. SUMMARY

[0005] The present application proposes a rail transit gearbox lubricating oil self-cleaning filtration system and method, which solves the problem that the existing splash lubrication and magnetic screw plug schemes cannot filter non-magnetic impurities, leading to accelerated lubricating oil pollution, abnormal wear of bearings and gears, short oil change cycle and high maintenance cost.

[0006] The technical solution of the present application is as follows:

[0007] The rail transit gear box lubricating oil self-cleaning filter system, including the shell, the shell is installed with input shaft, output shaft and first connecting shell, the output shaft is installed with first gear, the input shaft is installed with second gear, the first gear and the second gear are engaged, the shell is installed with first bearing and second bearing, the input shaft and the output shaft are installed with sealing cover, the shell is installed with first link plate and second link plate, the side of the shell is provided with filter assembly, the filter assembly is installed with adjusting assembly, the bottom of the first connecting shell is provided with first through hole, the shell is provided with groove and second through hole.

[0008] As a preferred scheme of the present application, the shell, the first connecting shell, the first link plate and the second link plate are fixedly connected as a whole structure, the left side of the second link plate corresponds to the position of the filter assembly, the first through hole and the groove are both above the first bearing, and the first through hole and the second through hole are in communication with each other.

[0009] As a preferred scheme of the present application, the middle of the first link plate corresponds to the position of the first connecting shell, and the right side of the first link plate corresponds to the position of the second bearing.

[0010] As a preferred scheme of the present application, the filter assembly comprises a second connecting shell fixedly connected to the shell, the second connecting shell is installed with a protrusion, the lower side of the protrusion is abutted with a first supporting block, the first supporting block is sequentially installed with a first filter plate, a second supporting block, a second filter plate and a third supporting block, and the second supporting block and the third supporting block are both provided with mounting grooves.

[0011] As a preferred scheme of the present application, the length of the mounting groove is greater than the width of the first filter plate, and the widths of the first filter plate and the second filter plate are equal.

[0012] As a preferred scheme of the present application, the third supporting block is installed with a fixing bolt between the second connecting shell, and the second supporting block is annular.

[0013] As a preferred scheme of the present application, the adjusting assembly comprises a fixing rod fixedly connected to the second supporting block and the third supporting block, the fixing rod is fixedly provided with a spring sheet, and the outer side of the spring sheet is fixedly connected with a steel rope.

[0014] As a preferred scheme of the present application, the spring sheet is provided with a tapered cylinder and a circular cylinder, and the circular cylinder is fixedly provided with a pressing block.

[0015] As a preferred scheme of the present application, the spring piece is in a "C" shape, the spring piece, the conical cylinder and the cylinder are all in a mesh structure, and the conical cylinder, the cylinder and the extrusion block are fixedly connected as a whole structure.

[0016] Rail transit gear box lubricating oil self-cleaning filtering method, comprising the following steps:

[0017] S1: when the input shaft rotates, the second gear drives the first gear and the output shaft to rotate, and the splashed lubricating oil on the first gear flows into the filter assembly on the left side of the housing through the second connecting plate;

[0018] S2: the lubricating oil also flows into the first connecting shell through the middle of the first connecting plate, and flows into the second bearing through the right side of the first connecting plate, the lubricating oil flows into the cavity between the first bearing, the housing, the output shaft and the sealing cover through the first through hole in the first connecting shell, lubricates the first bearing, and finally the lubricating oil flows back to the device housing again through the second through hole;

[0019] S3: when splashing lubrication, the lubricating oil flows from the outside of the upper filter assembly to the middle, and then flows from the middle to the surrounding of the lower filter assembly, completing a filtration.

[0020] The working principle and beneficial effects of the present application are:

[0021] (1) The first connecting plate and the second connecting plate are arranged, so that the splashing fluid can use its own fluid pressure to deliver the lubricating oil to the first bearing, the second bearing and the filter assembly, realizing the function of lubricating the bearings of the input shaft and the output shaft by using the pressure of the splashing fluid. The power source of the filtering system is the splashing pressure (0.05-0.1 MPa) driven by gear rotation to drive oil circulation, without additional power pump, with energy saving rate of 100%, using the first through hole above the first bearing and the second through hole below the first bearing, and realizing the "filtration-backflow" independent loop through the oil inlet / backflow channel, avoiding the secondary pollution risk of traditional open filtration, solving the problems of traditional splashing lubrication and magnetic screw plug scheme that cannot filter non-magnetic impurities, leading to accelerated lubricating oil pollution, abnormal wear of bearings and gears, short oil change cycle and high maintenance cost.

[0022] (2) The device is provided with a filter assembly and an adjusting assembly, when the spring piece in the adjusting assembly is not installed with a cylinder, the spring piece is in a normal contraction state, so as to pull the first filter plate and the second filter plate inward by the steel rope, reducing the passing size of the debris, when the spring piece is installed with a conical cylinder and a cylinder, the spring piece is expanded, so as to expand the first filter plate and the second filter plate outward, increasing the passing size of the debris of the filter assembly, thereby changing the overall filtering effect of the device, and being capable of adjusting the filtering performance of the filter assembly in layers, enhancing the application range of the device. BRIEF DESCRIPTION OF DRAWINGS

[0023] The application will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] Figure 1 is a schematic diagram of the overall structure of the self-cleaning filter system of the lubricating oil of the rail transit gear box of the application;

[0025] Figure 2 is a schematic diagram of the internal structure of the shell of the application;

[0026] Figure 3 is a schematic diagram of the connection structure of the shell and the second connecting shell of the application;

[0027] Figure 4 is a schematic diagram of the connection structure of the second filter plate and the third support block of the application;

[0028] Figure 5 is a schematic diagram of the connection structure of the first and second adapter plates of the application;

[0029] Figure 6 is a schematic diagram of the connection structure of the first and second adapter plates of the application; Figure 5 is an enlarged schematic diagram of the structure at A in the above figure;

[0030] Figure 7 is an enlarged schematic diagram of the structure at B in the above figure; Figure 5

[0031] is a schematic diagram of the connection structure of the shell and the first bearing of the application; Figure 8

[0032] is an enlarged schematic diagram of the structure at C in the above figure; Figure 9 Figure 8 is a schematic diagram of the disassembled structure of the filter assembly of the application;

[0033] Figure 10 is a schematic diagram of the disassembled structure of the adjustment assembly of the application;

[0034] Figure 11 is a schematic diagram of the overall structure of the adjustment assembly of the application;

[0035] Figure 12 is a schematic diagram of the internal structure of the shell of the application.

[0036] Figure 13

[0037] ​​Reference numerals: 1. Outer shell; 2. Input shaft; 3. Output shaft; 4. First connecting shell; 5. Sealing cover; 6. First gear; 7. Second gear; 8. First bearing; 9. Second bearing; 10. First connecting plate; 11. Second connecting plate; 12. Groove; 13. First through hole; 14. Filter assembly; 1401. Second connecting shell; 1402. Protrusion; 1403. First support block; 1404. First filter plate; 1405. Second support block; 1406. Second filter plate; 1407. Third support block; 1408. Mounting groove; 15. Fixing bolt; 16. Adjusting assembly; 1601. Fixing rod; 1602. Spring plate; 1603. Steel rope; 1604. Conical cylinder; 1605. Cylindrical cylinder; 1606. Extrusion block; 17. Second through hole. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0039] Example 1:

[0040] like Figures 1-3 As shown, this embodiment proposes a self-cleaning filtration system for lubricating oil in a rail transit gearbox, including a housing 1. An input shaft 2, an output shaft 3, and a first connecting shell 4 are mounted on the housing 1. A first gear 6 is mounted on the output shaft 3, and a second gear 7 is mounted on the input shaft 2. The first gear 6 and the second gear 7 are meshed together. A first bearing 8 and a second bearing 9 are installed inside the housing 1. The first bearing 8 supports the output shaft 3, and the second bearing 9 supports the input shaft 2. Sealing covers 5 are mounted on both the input shaft 2 and the output shaft 3. A first connecting plate 10 and a... The second connecting plate 11 and the side of the outer shell 1 are provided with a filter assembly 14. The splashed fluid will flow into the first bearing 8 and the second bearing 9 and the filter assembly 14 through the first connecting plate 10 and the second connecting plate 11. The filter assembly 14 is used to filter the lubricating oil. An adjustment assembly 16 is installed in the filter assembly 14. The bottom of the first connecting shell 4 is provided with a first through hole 13. The outer shell 1 is provided with a groove 12 and a second through hole 17. The splashed lubricating oil will enter the first through hole 13 and then flow into the second through hole 17 through the first bearing 8, so as to flow back into the outer shell 1.

[0041] Example 2:

[0042] like Figures 1-13 As shown, based on the same concept as Embodiment 1 above, this embodiment also proposes a self-cleaning filtration system for lubricating oil in rail transit gearboxes.

[0043] In the embodiment, the shell 1, the first connecting shell 4, the first connecting plate 10 and the second connecting plate 11 are fixedly connected as a whole structure, the left side of the second connecting plate 11 corresponds to the position of the filter assembly 14, the first through hole 13 and the groove 12 are both above the first bearing 8, the filter assembly 14 can filter the lubricating oil, the first through hole 13 and the second through hole 17 are in communication with each other, and after lubrication, the first through hole 13 and the second through hole 17 in communication with each other can make the lubricating oil flow back to the inside of the device.

[0044] In the embodiment, the middle of the first connecting plate 10 corresponds to the position of the first connecting shell 4, and the right side of the first connecting plate 10 corresponds to the position of the second bearing 9, so that the first connecting plate 10 can guide the lubricating oil to the position of the second bearing 9, thereby realizing the lubrication function by using the splashing fluid.

[0045] In the embodiment, the filter assembly 14 includes a second connecting shell 1401 fixedly connected to the shell 1, a protrusion 1402 is installed in the second connecting shell 1401, a first supporting block 1403 is abutted below the protrusion 1402, a first filter plate 1404, a second supporting block 1405, a second filter plate 1406 and a third supporting block 1407 are sequentially installed below the first supporting block 1403, and installation grooves 1408 are formed in the second supporting block 1405 and the third supporting block 1407. Figure 8 As shown in the figure, the splashing lubricating oil will first flow into the upper first filter plate 1404 from the recessed area between the first supporting block 1403 and the second connecting shell 1401, then flow into the middle position of the lower third supporting block 1407 through the hole in the middle of the second supporting block 1405, and flow out from the middle to the outside, and the second filter plate 1406 is used to clean the impurities, and finally flows back to the inside of the shell 1 from the lower right of the second connecting shell 1401, completing a filtration.

[0046] In the embodiment, the length of the installation groove 1408 is greater than the width of the first filter plate 1404, the width of the first filter plate 1404 and the second filter plate 1406 is equal, a fixing bolt 15 is installed between the third supporting block 1407 and the second connecting shell 1401, and the second supporting block 1405 is annular. The annular structure of the second supporting block 1405 can supply lubricating oil to flow into the lower filtering area for layered filtration, and the fixing bolt 15 can be removed later to replace or clean the first filter plate 1404 and the second filter plate 1406.

[0047] In this embodiment, the adjustment component 16 includes a fixing rod 1601 fixedly connected to the second support block 1405 and the third support block 1407. A spring plate 1602 is fixedly mounted on the fixing rod 1601. A steel rope 1603 is fixedly connected to the outer side of the spring plate 1602. A cone 1604 and a cylinder 1605 are disposed inside the spring plate 1602. A pressing block 1606 is fixedly mounted on the cylinder 1605. Figures 11-13 It can be seen that the steel ropes 1603 on the upper and lower layers of spring plates 1602 are fixedly connected to the first filter plate 1404 and the second filter plate 1406, respectively. When the cone 1604 and the cylinder 1605 are not installed inside the spring plate 1602, as... Figure 12 As shown, at this time, the spring plate 1602 retracts normally, which in turn causes the steel ropes 1603 on the spring plate 1602 to pull the first filter plate 1404 or the second filter plate 1406. Each filter plate slides in the mounting groove 1408 and retracts towards the central axis of the first support block 1403, thereby narrowing the screen gap. When the conical cylinder 1604 and the cylindrical cylinder 1605 are installed inside the spring plate 1602, as... Figure 13 As shown, at this time, the spring plate 1602 expands and pushes the first filter plate 1404 or the second filter plate 1406 outward, so that the device can increase the sieve gap, thereby realizing the function of adjusting the filtration effect.

[0048] In this embodiment, the spring sheet 1602 is C-shaped. The spring sheet 1602, the cone 1604, and the cylinder 1605 are all mesh structures. The cone 1604, the cylinder 1605, and the extrusion block 1606 are fixedly connected as an integral structure. After the cone 1604 and the cylinder 1605 are installed inside the C-shaped spring sheet 1602, the extrusion block 1606 will fill the C-shaped notch of the spring sheet 1602, thereby achieving the clamping function and ensuring the stability of the filter structure.

[0049] The working method of the self-cleaning filtration system for lubricating oil in rail transit gearboxes of the present invention is as follows:

[0050] First, such as Figures 1-3 , Figures 6-13 As shown, when the input shaft 2 rotates, it drives the first gear 6 and the output shaft 3 to rotate via the second gear 7. Lubricating oil splashed from the first gear 6 flows through the first connecting plate 10 into the second connecting plate 11 on the left, then into the filter assembly 14. It then flows through the middle of the first connecting plate 10 into the groove 12, and finally into the first connecting housing 4. Lubricating oil on the right side of the first connecting plate 10 flows into the second bearing 9. The first through hole 13 in the first connecting housing 4 guides the lubricating oil to the cavity between the first bearing 8, the housing 1, the output shaft 3, and the sealing cover 5. After the first bearing 8 is lubricated, as... Figure 13 As shown, the lubricating oil will flow back into the device housing 1 through the second through hole 17.

[0051] In splash lubrication, the lubricating oil flows from the outside of the upper filter assembly 14 to the middle, and then from the middle to the periphery of the lower filter assembly 14, which is combined with Figures 3-12 As shown in the figure, the lubricating oil flows from the recessed area between the first supporting block 1403 and the second connecting shell 1401 into the first filter plate 1404 of the upper layer of the filter assembly 14, and then flows into the middle position of the third supporting block 1407 of the lower layer of the filter assembly 14 through the hole in the middle of the second supporting block 1405, and flows out from the middle to the outside, and is cleaned of impurities by the second filter plate 1406, and finally flows back to the inside of the shell 1 from the lower right of the second connecting shell 1401, completing a filtering cycle. As shown in the figure, Figures 10-13 As can be seen, the steel ropes 1603 on the upper and lower spring plates 1602 are fixedly connected with the first filter plate 1404 and the second filter plate 1406, respectively, when the conical cylinder 1604 and the cylindrical cylinder 1605 are not installed in the spring plate 1602, as shown in the figure, Figure 12 At this time, the spring plate 1602 normally contracts, and then the steel ropes 1603 on the spring plate 1602 pull the first filter plate 1404 or the second filter plate 1406, and each filter plate slides in the installation groove 1408 and contracts towards the central axis of the first supporting block 1403, thereby reducing the size of the impurity screen gap during filtering, and when the conical cylinder 1604 and the cylindrical cylinder 1605 are installed in the spring plate 1602, the spring plate 1602 expands and pushes the first filter plate 1404 or the second filter plate 1406 outward, increasing the size of the screen gap, thereby achieving the adjustment function of the filtering effect. After the conical cylinder 1604 and the cylindrical cylinder 1605 are installed in the "C"-shaped spring plate 1602, the extrusion block 1606 fills the "C"-shaped gap position of the spring plate 1602, thereby achieving the clamping function and ensuring the stability of the filtering structure.

[0052] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A rail transit gearbox lubricating oil self-cleaning filtration system comprising a shell (1), characterized in that: The shell (1) is provided with an input shaft (2), an output shaft (3) and a first connecting shell (4), the output shaft (3) is provided with a first gear (6), the input shaft (2) is provided with a second gear (7), the first gear (6) and the second gear (7) are in meshing connection, the shell (1) is provided with a first bearing (8) and a second bearing (9), the input shaft (2) and the output shaft (3) are provided with sealing covers (5), the shell (1) is provided with a first connecting plate (10) and a second connecting plate (11), the side of the shell (1) is provided with a filtering assembly (14), the filtering assembly (14) is provided with an adjusting assembly (16), the bottom of the first connecting shell (4) is provided with a first through hole (13), the shell (1) is provided with a groove (12) and a second through hole (17); The shell (1), the first connecting shell (4), the first connecting plate (10) and the second connecting plate (11) are fixedly connected as an integral structure, the left side of the second connecting plate (11) corresponds to the position of the filtering assembly (14), the first through hole (13) and the groove (12) are located above the first bearing (8), and the first through hole (13) and the second through hole (17) are in communication with each other; The middle of the first connecting plate (10) corresponds to the position of the first connecting shell (4), and the right side of the first connecting plate (10) corresponds to the position of the second bearing (9).

2. The rail transit gearbox lubricating oil self-cleaning filtration system according to claim 1, characterized in that, The filtering assembly (14) comprises a second connecting shell (1401) fixedly connected to the shell (1), the second connecting shell (1401) is provided with a protruding block (1402), the first supporting block (1403) is arranged below the protruding block (1402), the first filter plate (1404), the second supporting block (1405), the second filter plate (1406) and the third supporting block (1407) are sequentially arranged below the first supporting block (1403), and the second supporting block (1405) and the third supporting block (1407) are provided with mounting grooves (1408).

3. The rail transit gearbox lubricating oil self-cleaning filtration system according to claim 2, characterized in that, The length of the mounting groove (1408) is greater than the width of the first filter plate (1404), and the widths of the first filter plate (1404) and the second filter plate (1406) are equal.

4. The rail transit gearbox lubricating oil self-cleaning filtration system according to claim 3, characterized in that, The third supporting block (1407) and the second connecting shell (1401) are provided with a fixing bolt (15), and the second supporting block (1405) is annular.

5. The rail transit gearbox lubricating oil self-cleaning filtration system according to claim 4, characterized in that, The adjusting assembly (16) comprises a fixing rod (1601) fixedly connected to the second supporting block (1405) and the third supporting block (1407), the fixing rod (1601) is fixedly provided with a spring sheet (1602), and the outer side of the spring sheet (1602) is fixedly connected with a steel wire (1603).

6. The rail transit gearbox lubricating oil self-cleaning filtration system according to claim 5, characterized in that, The spring sheet (1602) is provided with a tapered cylinder (1604) and a circular cylinder (1605), and the circular cylinder (1605) is fixedly provided with an extrusion block (1606).

7. The rail transit gearbox lubricating oil self-cleaning filtration system according to claim 6, characterized in that, The spring sheet (1602) is in a "C" shape, the spring sheet (1602), the conical cylinder (1604) and the cylinder (1605) are all in a mesh structure, and the conical cylinder (1604), the cylinder (1605) and the extrusion block (1606) are fixedly connected into an integral structure.

8. A rail transit gearbox lubricating oil self-cleaning filtration method, using the rail transit gearbox lubricating oil self-cleaning filtration system of claim 1, characterized in that, It comprises the following steps: S1: when the input shaft (2) rotates, the second gear (7) drives the first gear (6) and the output shaft (3) to rotate, and the splashed lubricating oil on the first gear (6) flows into the filter assembly (14) on the left side of the housing (1) through the second connecting plate (11); S2: the lubricating oil also flows into the first connecting shell (4) through the middle of the first connecting plate (10), flows into the second bearing (9) through the right side of the first connecting plate (10), and flows into the cavity between the first bearing (8), the housing (1), the output shaft (3) and the sealing cover (5) through the first through hole (13) in the first connecting shell (4), lubricates the first bearing (8), and finally the lubricating oil flows back into the device housing (1) through the second through hole (17); S3: when splashing lubrication, the lubricating oil flows from the outside of the upper filter assembly (14) to the middle, and then flows from the middle to the surrounding of the lower filter assembly (14), completing a filtration.

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