Segmented grease injection device and method for cylindrical roller bearing of motor train unit

Abstract

The invention discloses a segmented grease injection device for a cylindrical roller bearing of a motor train unit, and belongs to the technical field of grease injection lubrication of bearings of rail transit vehicles. The inner ring positioning and centering piece can be coaxial with the inner ring of the cylindrical roller bearing and is used for supporting the cylindrical roller bearing; wherein the probe component can be arranged on the outer ring of a cylindrical roller bearing in a sleeving manner and is coaxial with the cylindrical roller bearing, a plurality of porous probe structures are formed in the circumferential direction of the front end of the probe component and are used for probing into gaps between two adjacent cylindrical rollers and a raceway surface, and grease is injected through probe holes in different positions of the porous probe structures; according to the invention, the difficulty of uniform filling of lubricating grease is effectively solved, the demand of dispersing grease in a raceway in the earlier stage of a cylindrical roller bearing is met, then manpower is liberated, the process efficiency is improved, dust fall intervention of external impurities is reduced, and the reliability and stability of a grease injection process are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bearing lubrication of rail transit vehicles, and particularly relates to a segmented grease injection device and method for a motor train unit cylindrical roller bearing. BACKGROUND

[0002] The grease filling process of the axle box bearing of the high-speed motor train unit is a key link in the bearing assembly process. If too much grease is injected, the bearing will generate instantaneous grease extrusion during actual operation, which will cause friction and heat generation, resulting in early warning and alarm failures. In severe cases, it will cause the train to slow down and stop, affecting the safe operation of the train. If too little grease is injected, poor lubrication will occur during the extended maintenance of the motor train unit, and even earlier in the bearing operation, which will cause rapid mechanical wear of internal components, affect the service life of the bearing, and cause fatigue failure of the bearing. At this time, the wheelset must be replaced in time to prevent further "cutting shaft" failure.

[0003] The existing cylindrical roller bearings of the motor train unit all use two-end press injection of grease, and then a relatively simple rotation is performed to evenly distribute the grease. Even after the bearing is pressed onto the wheelset, the wheelset with the bearing installed needs to be run on the test bench or undergo test running on the whole vehicle before being put into formal operation. These measures are all to avoid the problem of uneven distribution of grease after the bearing is stored. Even so, short mileage running cannot meet the demand for sufficient and uniform distribution of grease. Each roller and the raceway may not be fully and uniformly lubricated. Unlike tapered roller bearings, cylindrical roller bearings do not have a "pumping effect", and the oil in the middle cannot be dispersed to the raceways on both sides by pumping. The oil stored in the middle gap of the double-row cylindrical roller bearing and the space of the sealing cover at both ends can only enter the raceway surface to be stirred by the changing temperature and pressure inside and the dragging of the rotating parts. A little better basic oil is separated from the soap base to meet the lubrication of the bearing raceway, and the initial lubrication effect is very slow. According to the operation statistics, test comparison and disassembly inspection, even if the total amount of grease injection is the same, the operation effect of the bearing will be significantly different if the distribution of the grease is different. Therefore, segmented grease injection of the bearing is particularly important.

[0004] At present, in order to lubricate the bearing uniformly, segmented grease injection can be performed during bearing assembly, but most manufacturers perform this process manually. The machine is difficult to perform segmented grease injection on the inside of the bearing, and it is difficult to accurately control the output of the specified amount of grease. The manual segmented grease injection method has the following problems: 1. It consumes manpower and time; 2. The stability and reliability of manual labor are poor; 3. When assembling such precise rotating parts, the presence of people in the environment will adversely affect the dust amount, which poses a potential risk to the lubrication of the bearing.

[0005] Therefore, in view of the above problems, it is necessary for the present invention to provide a segmented grease injection device and method for cylindrical roller bearings of high-speed trains that can uniformly disperse grease. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology. First, it solves the problem of uniform grease filling and meets the need for grease to be dispersed in the raceway in the early stage of cylindrical roller bearings. Second, it frees up manpower and reduces the problem of dust interference from external impurities.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This invention discloses a segmented grease injection device for cylindrical roller bearings in high-speed trains, comprising:

[0009] A probe component connected at one end to a grease pump; and

[0010] The inner ring positioning and centering component is coaxial with the inner ring of the cylindrical roller bearing and is used to support the cylindrical roller bearing.

[0011] The probe component can be sleeved on the outer ring of the cylindrical roller bearing and coaxial with it. The front end of the probe component has a plurality of porous probe structures formed circumferentially, which are used to probe into the gap between two adjacent cylindrical rollers and the raceway surface, and to inject grease through the probe openings at different positions of the porous probe structures.

[0012] Furthermore, several of the porous probe structures are formed at intervals on the same virtual circle, the diameter of which is smaller than the diameter of the central circle formed by multiple cylindrical rollers.

[0013] Furthermore, the probe component includes a front probe, and a plurality of porous probe structures are formed circumferentially on one end face of the front probe. The porous probe structures have grease channels that communicate with the probe openings on their sidewalls.

[0014] Furthermore, the probe component also includes a mounting sleeve that can be fitted onto the outside of the front probe, one end of which has a mating section for coaxial connection with the outer ring of the cylindrical roller bearing.

[0015] Furthermore, the inner wall of the mounting sleeve is formed with a first connecting section and a second connecting section, the first connecting section being threadedly connected to the grease pump, and the second connecting section being threadedly connected to the front probe.

[0016] Furthermore, the mounting sleeve forms a accommodating cavity between the first connecting section and the second connecting section, which is used to pre-distribute the required grease evenly on the rear end face of the front probe during the grease injection process. The accommodating cavity is connected to the grease channel and the grease injection channel of the grease injection pump.

[0017] Furthermore, the inner ring positioning and centering component includes a base and a positioning sleeve mounted on the base for supporting the cylindrical roller bearing. The positioning sleeve has a connecting post for coaxial connection with the inner diameter of the inner ring of the cylindrical roller bearing.

[0018] Furthermore, the diameters and spacing of the various probe openings are equal.

[0019] Furthermore, the diameters and spacing of the various probe openings are not equal.

[0020] A method for segmented grease injection of cylindrical roller bearings in high-speed trains is invented, utilizing the segmented grease injection device for cylindrical roller bearings in high-speed trains described above:

[0021] In this method, the bottom of the cylindrical roller bearing is sealed and the top is open. A segmented grease injection probe is inserted into the cylindrical roller bearing from the top. The probe structure on the probe has flow holes along its length. The probe is aligned with the outer ring of the cylindrical roller bearing and the grease is discharged through the flow holes to achieve uniform grease injection into the internal gap of the cylindrical roller bearing.

[0022] In the above technical solution, the segmented grease injection device for cylindrical roller bearings of high-speed trains provided by the present invention has the following advantages:

[0023] This segmented grease injection device, firstly, connects the probe to the grease pump while ensuring coaxial connection with the outer ring of the cylindrical roller bearing. The inner ring positioning and centering component positions and supports the cylindrical roller bearing. The probe's multi-hole probe structure at its front end can penetrate the gap between two adjacent cylindrical rollers and the raceway surface. Grease injection is achieved through probe openings at different positions on the multi-hole probe structure, effectively solving the difficulty of uniform grease filling and meeting the requirement for initial grease dispersion within the raceway of cylindrical roller bearings. Secondly, it frees up manpower, improves process efficiency, reduces dust interference from external impurities, and increases the reliability and stability of the grease injection process.

[0024] In the above technical solution, the present invention provides a method for segmented grease injection of cylindrical roller bearings for high-speed trains, which has the following advantages:

[0025] This method introduces a segmented grease injection process from the source of bearing assembly, so that a certain amount of grease is distributed according to the calculated needs and adapted to different segmented grease injection schemes, filling the raceway surface in sections. In this way, it not only solves the problem of the process of grease evenly distributing the bearing, which consumes a lot of effort, but also solves the "pumping effect" that cylindrical bearings do not have in the early stage of use, allowing a thin film of grease to be distributed on the bearing raceway quickly, so that the bearing is in the best working condition from the beginning. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0027] Figure 1 This is an isometric view of the segmented grease injection device for cylindrical roller bearings of high-speed trains disclosed in this invention.

[0028] Figure 2 This is a cross-sectional view of the segmented grease injection device for cylindrical roller bearings of high-speed trains disclosed in this invention.

[0029] Figure 3 This is a schematic diagram of the overall structure of the probe disclosed in this invention;

[0030] Figure 4 This is a cross-sectional view of the probe disclosed in this invention;

[0031] Figure 5 This is the isometric view of the front-end probe disclosed in this invention;

[0032] Figure 6 This is a cross-sectional view of the front-end probe disclosed in this invention;

[0033] Figure 7 This is a partial enlarged view of the front-end probe disclosed in this invention;

[0034] Figure 8 This is a schematic diagram of an embodiment of the multi-hole probe structure of the front-end probe disclosed in this invention;

[0035] Figure 9 This is a schematic diagram of Embodiment 2 of the multi-hole probe structure of the front-end probe disclosed in this invention;

[0036] Figure 10 This is the isometric drawing of the mounting sleeve disclosed in this invention;

[0037] Figure 11 This is a sectional view of the mounting sleeve disclosed in this invention;

[0038] Figure 12 This is an isometric drawing of the inner ring positioning and centering component (with bearing) disclosed in this invention;

[0039] Figure 13 This is a cross-sectional view of the inner ring positioning and centering component (with bearing) disclosed in this invention.

[0040] Figure 14 This is a top view of the inner ring positioning and centering component (with bearing) disclosed in this invention.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Cylindrical roller bearing; 2. Front probe; 3. Mounting sleeve; 4. Grease pump; 5. Positioning sleeve; 6. Base; 7. Probe insertion position;

[0043] 2-1. Porous probe structure; 2-1-1. Probe opening; 2-2. Grease channel;

[0044] 3-1, First connecting section; 3-2, Second connecting section; 3-3, Fitting section. Detailed Implementation

[0045] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0046] See Figure 1 , 2 As shown;

[0047] An invention provides a segmented grease injection device for cylindrical roller bearings in high-speed trains. The cylindrical roller bearing 1 is composed of an inner ring, an outer ring, a cage, rollers, grease, and a sealing cover. The segmented grease injection device includes a probe component and an inner ring positioning and centering component.

[0048] The probe component has a front probe 2 and a mounting sleeve 3, and one end of the probe component is connected to the grease pump 4 through the mounting sleeve 3;

[0049] The inner ring positioning and centering component is coaxial with the inner ring of the cylindrical roller bearing 1 and supports the cylindrical roller bearing 1.

[0050] The probe component can be fitted onto the outer ring of the cylindrical roller bearing 1 and coaxial with it through the mounting sleeve 3. The front probe 2 of the probe component has several porous probe structures 2-1 formed circumferentially, which are used to probe into the gap between two adjacent cylindrical rollers and the raceway surface, and to inject grease through the probe openings 2-1-1 at different positions.

[0051] This segmented grease injection device employs a segmented grease injection probe component. Through several multi-hole probe structures 2-1 at the front end of the probe component, it addresses the challenge of uniformly filling grease into cylindrical roller bearings in high-speed trains. Furthermore, by integrating the probe component with the outer ring of the bearing, it achieves precise and uniform grease injection into the internal clearance of the cylindrical roller bearing 1. (See [link to relevant documentation]). Figure 5 As shown, preferably, several porous probe structures 2-1 are formed at intervals on the same virtual circle, the diameter of the virtual circle being smaller than the diameter of the central circle formed by multiple cylindrical rollers, and the probe insertion position 7 is as shown. Figure 14 As shown.

[0052] When the double-row cylindrical roller bearing 1 is greased on one side, see [reference needed]. Figure 13As shown, firstly, the positioning sleeve 5 of the inner ring positioning and centering component is fixed onto the base 6. Then, the bearing is inserted into the positioning sleeve 5 axially from top to bottom. The adapted probe component is then inserted into the bearing from top to bottom before the sealing cover is installed above the bearing. Simultaneously, the mounting sleeve 3 of the probe component is fixedly fitted onto the outer ring of the bearing and aligned. Each probe of the probe component has probe openings 2-1-1 of different diameters to accommodate different grease injection schemes and achieve precise control of grease injection.

[0053] See Figure 8 As shown, preferably, the diameters and spacing of the plurality of probe openings 2-1-1 are equal. In another preferred embodiment, see... Figure 9 As shown, the diameters and spacing of the several probe openings 2-1-1 are not equal; specifically, the diameters increase sequentially from top to bottom, and the spacing also increases sequentially from top to bottom. This structure allows for the replacement of different front-end probes 2 to obtain different grease filling effects for different grease injection schemes. The grease distribution area can be precisely controlled according to the roller and raceway profiles. Different probes have different flow orifice structures, and their opening diameters and spacings can be adapted and set based on calculations and experimental results.

[0054] See Figures 3-6 As shown:

[0055] Preferably, the probe component includes a front probe 2, and a plurality of porous probe structures 2-1 are formed circumferentially on one end face of the front probe 2. The porous probe structures 2-1 have grease channels 2-2 that communicate with probe openings 2-1-1 on their side walls. The grease channels 2-2 are connected to a grease pump 4. During use, the grease pump 4 pressurizes and continuously supplies grease.

[0056] See Figures 3-4 As shown in 10-11:

[0057] Preferably, the probe component also includes a mounting sleeve 3, which can be fitted onto the outside of the front probe 2. The mounting sleeve 3 has a mating section 3-3 at the end of the front probe 2, and is connected to the outside of the cylindrical roller bearing 1 through the mating section 3-3 and coaxially connected with its outer ring.

[0058] The inner wall of the mounting sleeve 3 has a first connecting section 3-1 and a second connecting section (3-2). The diameters of the first connecting section 3-1 and the second connecting section 3-2 are smaller than the diameter of the mating section 3-3. The internal thread of the first connecting section 3-1 is connected to the external thread of the grease pump 4, and the internal thread of the second connecting section 3-2 is connected to the external thread of the front probe 2.

[0059] The mounting sleeve 3 is located between the first connecting section 3-1 and the second connecting section 3-2. After being connected to the grease pump 4 and the front probe 2, it forms a accommodating cavity, which is used to pre-distribute the required grease evenly on the rear end face of the front probe 2 during the grease injection process. The accommodating cavity is connected to the grease channel 2-2 and the grease injection channel of the grease pump 4.

[0060] In this structure, the front probe 2 is aligned with the bearing outer ring by the mounting sleeve 3, and the coaxiality of the front probe 2 and the mounting sleeve 3 can be precisely controlled by machining and thread fitting. During grease injection, the multi-hole probe 2-1 can be inserted into the bearing through the gap between each roller, raceway surface and cage, and is correctly positioned.

[0061] See Figures 12-14 As shown:

[0062] Preferably, the inner ring positioning and centering component includes a base 6 and a positioning sleeve 5. The positioning sleeve 5 is installed on the upper part of the base 6. The positioning sleeve 5 has a connecting column and a shoulder. The cylindrical roller bearing 1 is supported by the shoulder, and the inner diameter of the inner ring of the cylindrical roller bearing 1 is coaxially connected by the connecting column.

[0063] A method for segmented grease injection of cylindrical roller bearings in high-speed trains is invented. The method utilizes the aforementioned segmented grease injection device for cylindrical roller bearings in high-speed trains. The method employs a segmented grease injection probe component that is inserted into the interior of the cylindrical roller bearing. The probe structure of the probe component has flow holes along its length. The probe component is connected to the cylindrical roller bearing 1 through a mounting sleeve 3. The mounting sleeve 3 is aligned and positioned with the outer ring of the cylindrical roller bearing 1. Grease is discharged through the flow holes to achieve uniform grease injection into the internal gaps of the cylindrical roller bearing.

[0064] This method effectively solves the difficulty of uniformly filling the grease in the cylindrical roller bearing of the EMU. By setting a front probe 2 with replaceable flow orifices and combining it with outer ring positioning, it achieves precise and uniform grease injection into the internal clearance of the cylindrical roller bearing 1.

[0065] In the above technical solution, the present invention provides a segmented grease injection device for cylindrical roller bearings of high-speed trains, and the method of use is as follows:

[0066] When grease-filling a double-row cylindrical roller bearing on one side, first, fix the locating sleeve 5 onto the base 6, then insert the bearing axially into the locating sleeve 5. At this point, the lower part of the bearing is sealed or has not yet been grease-filled, while the upper part is open. Figure 12 , 13 As shown, after tightening the fitted front probe 2 and mounting sleeve 3 by thread (as shown), Figure 3 , 4 As shown, the front probe 2 can be inserted from top to bottom in front of the sealing cover on the bearing. At the same time, the mounting sleeve 3 is fixedly clipped to the outer ring of the bearing to achieve the centering effect. After the grease pump 4 is connected to the mounting sleeve 3 by threads, pressure can be applied and grease can be injected by controlling the flow rate.

[0067] Different front probes can be used for different grease injection schemes to achieve different grease filling effects. The grease distribution area can be laid out according to the roller and raceway profile. Different probes have different flow orifice structures (e.g., Figure 9 As shown, there are various schemes with different opening diameters (R1, R2, R3...), different opening distances (L1, L2, L3...), and different opening distances and diameters. The schemes can be adapted according to the calculation and test results.

[0068] See Figure 14 As shown, the probe is already aligned with the outer ring and mounting sleeve 3, and the coaxiality of the front probe 2 and mounting sleeve 3 is precisely controlled. It can be inserted into the bearing 1 through the gap between each roller, raceway surface and cage. After the multi-hole probe structure 2-1 is correctly positioned at the probe insertion position 7, the grease pump 4 starts to inject grease. The grease is squeezed out through the grease channel 2-2 into each small probe opening 2-1-1. Because the gap between the multi-hole probe structure 2-1 and the roller, raceway and cage inside the bearing is very small, the grease squeezed out from each probe opening 2-1-1 can stick to the roller, raceway and cage. This device can be pre-lubricated before connecting the grease pump to ensure that the multi-hole probe structure is filled with grease evenly and fully, and it is also conducive to the precise control of the grease injection amount.

[0069] In the above technical solution, the present invention provides a segmented grease injection method for cylindrical roller bearings in high-speed trains. This method, to ensure better dispersion of the grease on the raceway surface and to avoid poor lubrication problems from the initial stage of use, introduces a segmented grease injection process from the bearing assembly stage. A fixed amount of grease is distributed according to calculated requirements, adapting to different segmented grease injection schemes, and filling the raceway surface in sections. This solves the problem of the laborious process of evenly distributing grease in the bearing, and also addresses the "pumping effect" that cylindrical bearings lack in the early stages of use, allowing a thin grease film to quickly form on the bearing raceway, ensuring the bearing is in optimal operating condition from the outset.

[0070] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A segmented grease injection device for cylindrical roller bearings in high-speed trains, characterized in that, include: A probe component that is connected at one end to a grease pump (4); as well as The inner ring positioning and centering component is coaxial with the inner ring of the cylindrical roller bearing (1) and is used to support the cylindrical roller bearing (1). The probe component can be fitted onto the outer ring of the cylindrical roller bearing (1) and coaxial with it. The front end of the probe component has several porous probe structures (2-1) formed in the circumferential direction, which are used to probe into the gap between two adjacent cylindrical rollers and the raceway surface, and to inject grease through the probe openings (2-1-1) at different positions of the porous probe structure (2-1).

2. The segmented grease injection device for cylindrical roller bearings in high-speed trains according to claim 1, characterized in that: Several of the porous probe structures (2-1) are formed at intervals on the same virtual circle, the diameter of which is smaller than the diameter of the central circle formed by multiple cylindrical rollers.

3. The segmented grease injection device for cylindrical roller bearings in high-speed trains according to claim 1 or 2, characterized in that: The probe component includes a front probe (2), and a plurality of porous probe structures (2-1) are formed circumferentially on one end face of the front probe (2). The porous probe structure (2-1) has an oil channel (2-2) inside that communicates with the probe opening (2-1-1) on its side wall.

4. The segmented grease injection device for cylindrical roller bearings in high-speed trains according to claim 3, characterized in that: The probe component also includes a mounting sleeve (3) that can be fitted onto the outside of the front probe (2). One end of the mounting sleeve (3) has a mating section (3-3) for coaxial connection with the outer ring of the cylindrical roller bearing (1).

5. The segmented grease injection device for cylindrical roller bearings in high-speed trains according to claim 4, characterized in that: The inner wall of the mounting sleeve (3) has a first connecting section (3-1) and a second connecting section (3-2). The first connecting section (3-1) is threadedly connected to the grease pump (4), and the second connecting section (3-2) is threadedly connected to the front probe (2).

6. The segmented grease injection device for cylindrical roller bearings in high-speed trains according to claim 5, characterized in that: The mounting sleeve (3) is located between the first connecting section (3-1) and the second connecting section (3-2) and forms a accommodating cavity for pre-distributing the required grease evenly on the rear end face of the front probe (2) during the grease injection process. The accommodating cavity is connected to the grease channel (2-2) and the grease injection channel of the grease pump (4).

7. The segmented grease injection device for cylindrical roller bearings in high-speed trains according to claim 1, characterized in that: The inner ring positioning and centering component includes a base (6) and a positioning sleeve (5) mounted on the base (6) for supporting the cylindrical roller bearing (1). The positioning sleeve (5) has a connecting post for coaxial connection with the inner diameter of the inner ring of the cylindrical roller bearing (1).

8. The segmented grease injection device for cylindrical roller bearings of high-speed trains according to claim 1 or 2, characterized in that: The diameters and spacing of the probe openings (2-1-1) are equal.

9. The segmented grease injection device for cylindrical roller bearings of high-speed trains according to claim 1 or 2, characterized in that: The diameters and spacing of some of the probe openings (2-1-1) are not equal.

10. A method for segmented grease injection of cylindrical roller bearings for high-speed trains, utilizing the segmented grease injection device for cylindrical roller bearings of high-speed trains as described in any one of claims 1-9, characterized in that: In this method, the bottom end of the cylindrical roller bearing (1) is sealed and the top end is open. A segmented grease injection probe component is used to probe into the interior of the cylindrical roller bearing from the top end. The probe structure on the probe component has flow holes along the length direction. The probe component is aligned with the outer ring of the cylindrical roller bearing. The grease is discharged through the flow holes to achieve uniform grease injection into the internal gap of the cylindrical roller bearing.

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