A new type of anti-fixed axle box bearing assembly for locomotive

Abstract

The invention relates to the technical field of locomotive axle boxes, and discloses a novel anti-fixing axle box bearing assembly for locomotives, comprising an axle box, wherein the axle box is provided with a bearing sliding outer ring, a bearing rolling inner ring and a bearing inner ring in sequence from the outside to the inside, and a detection mechanism is provided on the axle box, wherein the detection mechanism comprises a push rod penetrating the box body, and a shell is provided outside the push rod. Under normal operation, the running resistance of the rolling bearing is much smaller than the running resistance of the sliding bearing. When the inner rolling bearing fails, the rotation resistance increases rapidly. When it exceeds the running resistance of the sliding bearing, the axle box bearing will automatically switch to the sliding bearing working mode, and use the outer sliding bearing to work, so as to maintain the continued operation of the locomotive without stopping for rescue on the way, and ensure that the locomotive can quickly run to a station section with maintenance capabilities for fault handling. The scheme has a novel structure and adopts two modes of operation to ensure the normal operation of the axle box.

Description

Technical Field

[0001] The invention relates to the technical field of locomotive axle boxes, in particular to a new type of anti-seizure axle box bearing assembly for locomotives. Background Art

[0002] At present, the domestic railway has developed by leaps and bounds, and the railway lines are busy, with passenger and freight trains running together, and high-speed trains and ordinary trains running together on some lines. If a locomotive cannot run due to a fault, it needs to be rescued, which will affect the transportation order. In order to minimize the impact, it is necessary to safely drive the faulty locomotive off the railway as soon as possible, quickly open the occupied section, and minimize the impact on the railway transportation order.

[0003] The bogie drive unit is a key component of the locomotive. The drive unit is mainly composed of traction motor, axle box, axle box, gear box, driving gear, driven gear, etc. If the wheelset axle box bearing, rolling bearing, traction motor bearing and other components are burned or stuck during operation, and the wheelset is stuck and cannot rotate, rescue measures must be taken. According to the current rescue cases of the drive unit, the incidence of axle box bearing failure is relatively high.

[0004] When a fault occurs, there are usually two ways to rescue. The first is to use a professional rescue vehicle to lift the faulty drive or bogie, lift the wheels off the ground, and then cut off the faulty motor through the locomotive control system, or the locomotive is not started and towed to the maintenance site by other locomotives;

[0005] The disadvantages are: (1) When using a rescue vehicle, the locomotive speed needs to be limited to no more than 25 km / h on the straight section of the main line, no more than 20 km / h on the curve of the main line, and no more than 15 km / h when passing through a switch; (2) The main safety risks of using a rescue vehicle are deformation and damage of the substitute vehicle, separation of the wheels from the vehicle, derailment, etc.; (3) It is only suitable for short-distance rescue.

[0006] The second type is to adopt a rescue and return disposal plan where the wheelset at the fault position is suspended off the rail surface. The implementation of this plan has high technical requirements and requires the guidance of professionals. The implementation process is complicated. To achieve the suspension of the wheelset, it is generally necessary to first remove or cut off the axle box spring, and then tie the entire drive device to the frame through the axle box body, iron chain, sling, etc.

[0007] The disadvantages are: (1) The implementation process of the plan is cumbersome and requires high technical requirements, which requires guidance from professionals; (2) Long-distance transportation has high safety risks and is only suitable for short-distance rescue; (3) The operating speed of the faulty locomotive is limited and cannot exceed the maximum operating speed of 30 km / h, making it difficult to improve the efficiency of rescue locomotive transportation; (4) The additional vertical and lateral loads generated during locomotive operation require high strength and stiffness of the slings and rigging.

[0008] Axle box bearings are designed to transmit all vertical forces, lateral forces and longitudinal forces from the rotating parts (axles) and non-rotating parts (axle boxes) of the wheelset. There are two types of axle box bearing structures widely used on railway locomotives and rolling stock, double-row cylindrical roller bearings and double-row tapered roller bearings. When axle box bearings become stuck during operation, the vehicle must be stopped for rescue, occupying the route, seriously affecting the transportation order, and requiring the use of external rescue devices such as rescue vehicles for auxiliary rescue, which is time-consuming and labor-intensive;

[0009] Therefore, based on the above technical problems, it is necessary for technicians in this field to develop a new anti-seizure axle box bearing assembly for locomotives. Summary of the invention

[0010] The object of the present invention is to provide a novel anti-seizure axle box bearing assembly for locomotives to solve the problems raised in the above-mentioned background technology.

[0011] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a new type of anti-fixing axle box bearing assembly for locomotives, comprising an axle box, wherein the axle box is provided with a bearing sliding outer ring, a bearing rolling inner ring and a bearing inner ring from the outside to the inside in sequence, and the axle box is provided with a detection mechanism, and the detection mechanism includes a push rod passed through the box body, the outer shell of the push rod is provided with a shell, the top of the push rod is provided with an insulating cap, and the insulating cap is provided with a moving contact, the moving contact is connected to a power line, a static contact is provided above the moving contact, and the static contact is connected to a fault mode signal line.

[0012] Preferably, a return spring is provided on the inner wall of the shell, and the return spring is pressed against the insulating cap and the push rod.

[0013] Preferably, a temperature sensor probe for temperature detection is integrated in the push rod (10) to monitor the operating temperature of the bearing in real time under fault mode, providing a basis for the driver's control.

[0014] Preferably, a shaft end device is provided on the right side of the axle box, and the shaft end device is used to connect the transmission shaft.

[0015] Preferably, the bearing sliding outer ring and the bearing rolling inner ring are combined into a sliding bearing component, and the bearing rolling inner ring and the bearing inner ring are combined into a rolling bearing component.

[0016] Preferably, an oil groove is provided on the working surface of the sliding bearing component, and the oil groove is used to store lubricating oil.

[0017] Preferably, the sliding bearing component is provided with sliding bearing grease, and the rolling bearing component is provided with rolling bearing grease.

[0018] Preferably, the push rod is slidably connected to the axle box, and a groove is provided on the surface of the sliding outer ring of the bearing, and the groove matches the end face of the push rod.

[0019] Preferably, the fault mode signal line is connected to the locomotive cab control terminal; wherein, in the fault mode, the fault mode signal line (7) feeds back a fault signal to the locomotive cab control terminal, and the locomotive cab control terminal prompts the driver of the axle box bearing fault; the driver takes the following measures according to the bearing temperature:

[0020] When the bearing temperature is below 90 degrees Celsius, no other measures are applied;

[0021] When the bearing temperature is higher than 90 degrees Celsius, reduce the locomotive speed and request rescue at the nearest station.

[0022] Preferably, the resistance between the bearing sliding outer ring and the bearing rolling inner ring is greater than the resistance between the bearing rolling inner ring and the bearing inner ring.

[0023] Preferably, the bottom end of the push rod and the groove are both rounded.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) The present invention is a new type of anti-seizure axle box bearing assembly for locomotives, which is provided with sliding bearing components and rolling bearing components. Under normal operation, the running resistance of the rolling bearing is much smaller than the running resistance of the sliding bearing. When the inner rolling bearing fails, the rotational resistance increases rapidly. When it exceeds the running resistance of the sliding bearing, the axle box bearing will automatically switch to the sliding bearing working mode, and use the outer sliding bearing to work, so as to maintain the continued operation of the locomotive without stopping for rescue on the way, ensuring that the locomotive can quickly run to a station with maintenance capabilities for fault handling. This solution has a novel structure and adopts two modes of operation to ensure the normal operation of the axle box and can effectively prevent seizure.

[0026] (2) The present invention is a new type of anti-fixed axle box bearing assembly for locomotives, which is provided with a detection mechanism. When a rolling bearing component fails, the resistance increases. When the resistance is greater than the resistance of the outer sliding bearing component, the sliding outer ring of the bearing slides with the rolling inner ring of the bearing, thereby pushing the push rod to move upward. At this time, the moving and static contacts on the push rod come into contact, and the bearing fault signal is transmitted to the locomotive microcomputer, prompting the driver of the axle box bearing failure and changing the operation mode. At this time, the axle box bearing is changed to the sliding bearing mode, which can still ensure the normal operation of the locomotive. The present solution has a novel structure, saves time and effort, and can promptly feedback the axle box situation to the driver.

[0027] (3) The present invention is a new type of anti-seizure axle box bearing assembly for locomotives, which can restore the normal operation of the faulty locomotive without being attached to other locomotives, saving the cost of sending out locomotives for rescue missions. It is particularly suitable for the parking position of the locomotive with a drive device failure, which is far away from the nearest maintenance workshop or company capable of replacing the drive device, and requires long-distance and long-term line rescue. The rescue method of the present invention has more prominent advantages. The use of the axle box bearing device of the present invention can increase the operating speed of the faulty locomotive during the transportation and rescue process, greatly improve the rescue efficiency, and reduce the impact on the railway transportation order.

[0028] (4) The present invention is a new type of anti-seizure axle box bearing assembly for locomotives, which has a fault reminder function. The driver can receive locomotive fault information through the locomotive microcomputer system and monitor the bearing temperature in real time, providing a basis for judgment for the driver. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the axle box bearing installation structure of the present invention;

[0030] Figure 2 It is a schematic diagram of the structure of the detection mechanism in the present invention;

[0031] Figure 3 It is a schematic diagram of the local structure of the failure mode in the present invention.

[0032] In the accompanying drawings: 1. axle box; 2. detection mechanism; 3. bearing sliding outer ring; 4. bearing rolling inner ring; 5. bearing inner ring; 6. shaft end equipment; 7. fault mode signal line; 8. power line; 9. moving contact; 10. push rod; 11. static contact; 12. return spring; 13. insulating cap; 14. rolling bearing grease; 15. sliding bearing grease. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0035] Example

[0036] See also Figure 1 , Figure 2 and Figure 3As shown, the present invention provides a new anti-fixing axle box bearing assembly technical solution for locomotives: comprising an axle box 1, wherein the axle box 1 is provided with a bearing sliding outer ring 3, a bearing rolling inner ring 4 and a bearing inner ring 5 in sequence from the outside to the inside, and a detection mechanism 2 is provided on the axle box 1. Specifically, the detection mechanism 2 can be used to detect the operating status inside the axle box 1, so that the driver can understand it in time. The detection mechanism includes a push rod 10 that is inserted into the box body, and the push rod 10 is provided with a shell. The top of the push rod 10 is provided with an insulating cap 13, and the insulating cap 13 is provided with a moving contact 9. The moving contact 9 is provided on the moving contact 9. The contact 9 is connected to a power line 8, a static contact 11 is provided above the moving contact 9, a fault mode signal line 7 is connected to the static contact 11, the fault mode signal line 7 is connected to the control end of the locomotive cab, an axle end device 6 is provided on the right side of the axle box 1, the axle end device 6 is used to connect the transmission shaft, the bearing sliding outer ring 3 and the bearing rolling inner ring 4 are combined into a sliding bearing component, the bearing rolling inner ring 4 and the bearing inner ring 5 are combined into a rolling bearing component, and the resistance between the bearing sliding outer ring 3 and the bearing rolling inner ring 4 is greater than the resistance between the bearing rolling inner ring 4 and the bearing inner ring 5.

[0037] In the fault mode, the fault mode signal line 7 feeds back the fault signal to the locomotive cab control terminal, and the locomotive cab control terminal prompts the driver of the axle box bearing fault; the driver takes the following measures according to the bearing temperature:

[0038] When the bearing temperature is below 90 degrees Celsius, no other measures are applied;

[0039] When the bearing temperature is higher than 90 degrees Celsius, reduce the locomotive speed and request rescue at the nearest station.

[0040] In this embodiment, under normal operation, the running resistance of the rolling bearing component is much smaller than the running resistance of the sliding bearing component. When a rolling bearing component fails, the rotational resistance between the bearing rolling inner ring 4 and the bearing inner ring 5 increases rapidly. When it exceeds the running resistance between the bearing sliding outer ring 3 and the bearing rolling inner ring 4, the bearing operation mode of the axle box 1 will automatically switch to the sliding bearing component working mode, and the sliding bearing component will be used to maintain the continued operation of the locomotive without stopping for rescue on the way, ensuring that the locomotive can quickly run to a station with maintenance capabilities for fault handling.

[0041] See also Figure 1 , Figure 2 and Figure 3 As shown, further, the inner wall of the housing is provided with a return spring 12, which is pressed against the insulating cap 13 and the top rod 10. A temperature sensor probe for temperature detection is integrated in the top rod (10) to monitor the operating temperature of the bearing in real time under the fault mode.

[0042] In this embodiment, the designed return spring 12 is used to limit the push rod 10 and the insulating cap 13 .

[0043] See also Figure 1-3 As shown, further, an oil groove is provided on the working surface of the sliding bearing component, and the oil groove is used to store lubricating oil. A sliding bearing grease 15 is provided in the sliding bearing component, and a rolling bearing grease 14 is provided in the rolling bearing component.

[0044] In this embodiment, the provided sliding shaft grease 15, rolling bearing grease 14 and oil groove provide sliding lubrication requirements for the bearing operation.

[0045] See also Figure 1 , Figure 2 and Figure 3 As shown, further, the push rod 10 is slidably connected to the axle box 1, and a groove is provided on the surface of the bearing sliding outer ring 3, the groove matches the end face of the push rod 10, and the bottom end of the push rod 10 and the groove are both rounded.

[0046] In this embodiment, the designed ejector pin 10 and the groove can position the ejector pin 10 .

[0047] Specifically, the working principle and use process of the present invention are as follows:

[0048] Under normal conditions, the rolling bearing components in the axle box 1 are running, and no sliding will occur between the bearing sliding outer ring 3 and the bearing rolling inner ring 4.

[0049] In the fault mode, the detection mechanism 2 detects that when the rolling bearing component of the axle box 1 fails, the resistance increases. When the resistance is greater than the resistance of the outer sliding bearing component, the bearing sliding outer ring 3 slides with the bearing rolling inner ring 4, thereby pushing the push rod 10 to move upward. At this time, the moving and static contacts on the push rod 10 touch, and the bearing fault signal is transmitted to the locomotive computer, prompting the driver of the axle box bearing failure and the operation mode is changed. At this time, the axle box bearing is changed to the sliding bearing mode, which can still ensure the normal operation of the locomotive. The driver can reduce the locomotive speed according to the situation and request a rescue at the nearest station until the entire work sequence is completed.

[0050] The novel anti-seizure axle box bearing assembly for locomotives of the present invention has a fault reminder function. The driver can receive locomotive fault information through the locomotive microcomputer system, monitor the bearing temperature in real time, and provide a judgment basis for the driver.

[0051] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0052] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations 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 orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0053] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-fixed axle box bearing assembly for a locomotive, characterized in that: The invention comprises an axle box (1), wherein a bearing sliding outer ring (3), a bearing rolling inner ring (4) and a bearing inner ring (5) are arranged in sequence from the outside to the inside of the axle box (1), and a detection mechanism (2) is arranged on the axle box (1), wherein the detection mechanism comprises a push rod (10) which is inserted into the axle box (1) body, wherein the push rod (10) is provided with a shell, an insulating cap (13) is arranged on the top of the push rod (10), and a moving contact (9) is arranged on the insulating cap (13), wherein the moving contact (9) is connected to a power line (8), and a static contact (11) is arranged above the moving contact (9), and a fault mode signal line (7) is connected to the static contact (11); the push rod (10) is slidably connected to the axle box (1), and a groove is arranged on the surface of the bearing rolling inner ring (4), and the groove matches the end surface of the push rod (10).

2. The anti-seizure axle box bearing assembly for locomotive according to claim 1, characterized in that: The inner wall of the housing is provided with a return spring (12), and the return spring (12) is pressed against the insulating cap (13) and the push rod (10).

3. The anti-seizure axle box bearing assembly for locomotive according to claim 1, characterized in that: A shaft end device (6) is provided on the right side of the axle box (1), and the shaft end device (6) is used to connect a transmission shaft.

4. The anti-seizure axle box bearing assembly for locomotive according to claim 1, characterized in that: The bearing sliding outer ring (3) and the bearing rolling inner ring (4) are combined into a sliding bearing component, and the bearing rolling inner ring (4) and the bearing inner ring (5) are combined into a rolling bearing component.

5. The anti-seizure axle box bearing assembly for locomotive according to claim 4, characterized in that: The working surface of the sliding bearing component is provided with an oil groove, and the oil groove is used for storing lubricating oil.

6. The anti-seizure axle box bearing assembly for locomotive according to claim 4, characterized in that: The sliding bearing component is provided with sliding bearing grease (15), and the rolling bearing component is provided with rolling bearing grease (14).

7. The anti-seizure axle box bearing assembly for locomotive according to claim 1, characterized in that: The fault mode signal line (7) is connected to the locomotive cab control terminal; wherein, in the fault mode, the fault mode signal line (7) feeds back a fault signal to the locomotive cab control terminal, and the locomotive cab control terminal prompts the driver of the axle box bearing fault; the driver takes the following measures according to the bearing temperature: When the bearing temperature is below 90 degrees Celsius, no other measures are applied; When the bearing temperature is higher than 90 degrees Celsius, reduce the locomotive speed and request rescue at the nearest station.

8. The anti-seizure axle box bearing assembly for locomotive according to claim 1, characterized in that: The resistance between the bearing sliding outer ring (3) and the bearing rolling inner ring (4) is greater than the resistance between the bearing rolling inner ring (4) and the bearing inner ring (5).

9. The anti-seizure axle box bearing assembly for locomotive according to claim 1, characterized in that: The bottom end of the push rod (10) and the groove are both arranged in a rounded shape; a temperature sensor probe for temperature detection is integrated in the push rod (10) to monitor the operating temperature of the bearing in real time in a fault mode.

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