A ramming eccentric shaft bearing heat dissipation device

Abstract

This utility model relates to the field of auxiliary heat dissipation technology and equipment for bearing devices, and more specifically, to a heat dissipation device for a tamped eccentric shaft bearing. It includes an automatic oil replenisher, lubrication pipelines, and several mounting positions. The lubrication pipelines connect the automatic oil replenisher and the mounting positions, each mounting position housing a different bearing. The inner ring of each bearing is connected to the outer wall of the eccentric shaft. The inner cavities of the mounting positions and the inner cavity of the automatic oil replenisher form a communicating vessel structure. Each bearing has multiple rolling elements, with the rolling elements at the bottom of the bearing immersed in lubricating oil. The inner cavities of the mounting positions are connected to the inner cavity of the automatic oil replenisher through the lubrication pipelines, forming a closed oil circuit device based on the communicating vessel principle, thereby achieving lubrication and heat dissipation for the entire bearing. This utility model features compact installation, simple structure, reliable lubrication and heat dissipation effect, and reasonable cost, greatly improving bearing life and equipment operational stability.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary heat dissipation technology and equipment for bearing devices, and more specifically, to a heat dissipation device for a tamped eccentric shaft bearing. Background Technology

[0002] Small and medium-sized tamping equipment used in railway construction generally employs an eccentric shaft structure to generate vibration force. The bearings in this part need to operate continuously under high-speed, heavy-load, and impact conditions. Currently, the commonly used grease lubrication method for this type of equipment relies on manual, periodic grease replenishment. However, this method has the following significant drawbacks: during prolonged continuous operation, due to low heat dissipation efficiency, the bearing temperature easily rises, leading to grease liquefaction and loss, making it difficult to form a stable and effective lubricating film. This, in turn, accelerates bearing wear and may even cause failure. To maintain equipment operation, frequent interruptions for grease replenishment or forced reduction of continuous working time are necessary, severely impacting construction efficiency. Although existing technologies can improve this problem through centralized lubrication systems, their complex structure and high cost make them unsuitable for the economic and space constraints of small and medium-sized tamping equipment. Therefore, there is an urgent need for a simple, reliable, and cost-effective eccentric shaft bearing heat dissipation and lubrication device to improve bearing life and equipment operational stability. Summary of the Invention

[0003] The purpose of this invention is to address the problems existing in the prior art by providing a heat dissipation device for tamping eccentric shaft bearings. This invention includes an automatic oil replenisher, lubrication pipelines, and several mounting positions. The lubrication pipelines connect the automatic oil replenisher to the mounting positions, each mounting position housing a different bearing. The inner ring of each bearing is connected to the outer wall of the eccentric shaft. The inner cavities of the mounting positions and the inner cavity of the automatic oil replenisher form a communicating vessel structure. Each bearing has multiple rolling elements, with the rolling elements at the bottom of the bearing immersed in lubricating oil. The inner cavities of the mounting positions are connected to the inner cavity of the automatic oil replenisher via the lubrication pipelines, forming a closed oil circuit device based on the communicating vessel principle, thereby achieving lubrication and heat dissipation for the entire bearing. This invention features compact installation, simple structure, reliable lubrication and heat dissipation, and reasonable cost, significantly improving bearing life and equipment operational stability.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A heat dissipation device for a tamping eccentric shaft bearing includes an automatic oil replenisher, a lubrication pipeline, and several mounting positions. The lubrication pipeline connects the automatic oil replenisher and the mounting positions. Each mounting position is equipped with a different bearing. The inner ring of each bearing is connected to the outer wall of the eccentric shaft. The inner cavities of the mounting positions and the inner cavity of the automatic oil replenisher form a communicating vessel structure. The bearing is provided with several rolling elements that convert sliding friction into rolling friction. The rolling elements at the bottom of the bearing are immersed in lubricating oil. The inner cavities of the mounting positions are connected to the inner cavity of the automatic oil replenisher through the lubrication pipeline, thus forming a closed oil circuit device based on the communicating vessel principle.

[0006] Furthermore, when the automatic oil replenisher is stationary, the oil level inside the automatic oil replenisher and the oil level in all the installation positions tend to be at the same horizontal level, so that the global oil level is level.

[0007] Furthermore, the bottom of the automatic oil replenisher has an oil outlet, which is connected to the lubrication pipeline. An automatic control valve is installed at the oil outlet to open and close the lubrication pipeline passage according to the liquid level.

[0008] Furthermore, the automatic control valve is a float valve, which includes a float, a valve needle, and a valve seat. The valve needle is installed in the valve seat, and the valve seat divides the automatic oil replenisher into an upper oil storage area and a lower oil replenishment area. The lower oil replenishment area is connected to the lubrication pipeline.

[0009] Furthermore, each mounting position has an oil inlet, which connects the inner cavity of the mounting position to the lubrication pipeline.

[0010] Furthermore, the automatic oil replenisher is fixedly installed on the body of the tamping equipment by a bracket, and the installation position of the automatic oil replenisher is higher than the position of the bearing; by installing the automatic oil replenisher higher than the bearing, when the oil level drops due to consumption, the pressure difference formed by the height difference of the liquid surface can quickly drive the oil to replenish, so as to keep the liquid level line horizontal.

[0011] Furthermore, the height of the oil is located at 1 / 3 to 2 / 3 of the height of the rolling element at the lower part of the bearing.

[0012] Furthermore, the oil is immersed up to half the height of the rolling element below the bearing.

[0013] Furthermore, the mounting position is box-shaped, and the eccentric shaft includes a main journal whose axis coincides with the rotation center line, and an eccentric journal whose axis deviates from the rotation center line. The axis of the main journal coincides with the horizontal center line of the mounting position.

[0014] Furthermore, the maximum outer diameter of the bearing is smaller than the width and height of the mounting position.

[0015] Furthermore, the bearing mounted on the eccentric journal rotates around the rotation center line of the eccentric shaft, and the outer edge of its rotation path forms a circular motion trajectory. The width and height of the mounting position are both greater than the diameter of the circular motion trajectory.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention connects an automatic oil replenisher to several mounting positions via lubrication lines. Different bearings are installed at each mounting position, with the inner rings of each bearing connected to the outer wall of an eccentric shaft. The inner cavities of the mounting positions and the automatic oil replenisher form a communicating vessel structure. Each bearing has multiple rolling elements, with the bottom rolling elements immersed in lubricating oil. The inner cavities of the mounting positions are connected to the automatic oil replenisher via lubrication lines, creating a closed oil circuit device based on the communicating vessel principle, thus achieving lubrication and heat dissipation for the entire bearing system. This invention features compact installation, simple structure, reliable lubrication and heat dissipation, and reasonable cost, significantly improving bearing life and equipment operational stability. Attached Figure Description

[0018] Figure 1 This is an overall structural diagram of the present invention;

[0019] Figure 2 This is a partial structural diagram of the present invention;

[0020] Figure 3 This is an installation diagram of the present invention;

[0021] Figure 4 This is a partial enlarged view of the installation of this utility model;

[0022] Figure 5 This is a schematic diagram of the operation of this utility model.

[0023] The labels in the diagram are as follows: 1. Automatic oil replenisher; 11. Oil outlet; 2. Mounting position; 21. Oil inlet; 3. Bearing; 31. Rolling element; 4. Eccentric shaft; 5. Lubrication line; 6. Liquid level line; 7. Flywheel. Detailed Implementation

[0024] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] In the description of this utility model, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Example 1:

[0027] Please see Figure 1-4 A heat dissipation device for a tamping eccentric shaft bearing includes an automatic oil replenisher 1, a lubrication pipeline 5, and several mounting positions 2. The lubrication pipeline 5 connects the automatic oil replenisher 1 and the several mounting positions 2. Each mounting position 2 is equipped with a different bearing 3. The inner ring of each bearing 3 is connected to the outer wall of the eccentric shaft 4. The inner cavity of the several mounting positions 2 and the inner cavity of the automatic oil replenisher 1 form a communicating vessel structure. The bearing 3 includes several rolling elements 31 that convert sliding friction into rolling friction. The rolling elements 31 located at the bottom of the bearing 3 are immersed in oil.

[0028] The lubrication line 5 connects the automatic oil replenisher to the mounting positions 2 of each bearing. Each mounting position 2 is equipped with an independent bearing 3. The inner ring of each bearing 3 is interference-fitted with the eccentric shaft 4, while the outer ring is fixed in the seat hole of the mounting position 2. The inner cavities of several mounting positions 2 are connected to the inner cavity of the automatic oil replenisher 1 through the lubrication line 5, forming a closed oil circuit device based on the principle of communicating vessels.

[0029] Specifically, the bearing 3 includes several rolling elements 31 that convert sliding friction into rolling friction. After initial lubrication, the oil level in the inner cavity of the mounting position 2 rises and eventually stabilizes at a preset height, ensuring that the rolling elements 31 at the bottom of the bearing 3 are immersed in the oil to complete lubrication and heat dissipation. When the lubrication level drops, the automatic oil replenisher 1 automatically replenishes oil through pressure difference.

[0030] It should be noted that the automatic oil replenisher 1 adopts a constant-level oil cup. The automatic oil replenisher 1 is the oil source and oil level control mechanism of this device. The automatic oil replenisher 1 stores sufficient lubricating oil inside. The bottom of the automatic oil replenisher 1 is connected to the bottom of each installation position 2 through a pipeline.

[0031] When the automatic oil replenisher 1 is stationary, the oil level inside the automatic oil replenisher 1 and the oil level in all installation positions 2 tend to be at the same level, so that the global oil level is level.

[0032] When the automatic oil replenisher 1 is running, the rolling elements 31 at the bottom of the bearing 3 are immersed in oil. The bearing 3 generates heat due to friction and oil agitation, leading to oil consumption and a drop in the oil level within the mounting position 2. When the oil level in a certain mounting position 2 falls below the preset height of the automatic oil replenisher 1, pressure is applied to the oil reservoir surface of the automatic oil replenisher 1, forcing oil through the lubrication pipe 5 into the mounting position 2 where the oil level is below the preset height, until the oil levels in all connected parts are restored to the same level. This process can be achieved without external power, ensuring stable and continuous oil bath lubrication of the bearing 3.

[0033] When tamping the eccentric shaft, first inject lubricating oil into the automatic oil replenisher 1. Under the action of the communicating vessel principle, the oil flows through the lubrication pipe 5 to fill the inner cavity of each mounting position 2 until the liquid level of all connected containers (i.e., the automatic oil replenisher 1 and each mounting position 2) reaches the preset height and is maintained on the same liquid level line 6. At this time, the rolling element 31 at the bottom of the bearing 3 is partially submerged in oil.

[0034] When the tamping equipment is started, the eccentric shaft 4 drives the bearing 3 and the rolling elements 31 on the bearing 3 to rotate. The rolling elements 31 immersed in the oil carry the lubricating oil and splash it onto the contact surfaces inside the bearing 3 that need lubrication. At the same time, the heat generated by friction is transferred to the oil, thereby achieving the technical effects of lubrication and heat dissipation.

[0035] During the long-term operation of the tamping equipment, the oil level can be automatically monitored through the connected liquid surface. When the oil consumption decreases, causing the liquid level in any installation position 2 to drop, the automatic oil replenisher 1 will immediately use the generated pressure difference to automatically replenish the lubricating oil in the installation position 2, so that the liquid level is always maintained at the initially set height, ensuring the oil immersion depth of the rolling element 31, thereby ensuring the continuity and reliability of the lubrication and heat dissipation effect of this device.

[0036] An oil outlet 11 is opened at the bottom of the automatic oil replenisher 1. The automatic oil replenisher 1 is connected to the lubrication pipeline 5 through the oil outlet 11. An automatic control valve is installed in the automatic oil replenisher 1 near the oil outlet 11. The automatic control valve opens and closes the passage of the lubrication pipeline 5 according to the liquid level.

[0037] Preferably, the automatic control valve is a float valve, which includes a float, a valve needle, and a valve seat. The valve needle is installed in the valve seat to achieve the fluid cut-off function. It should be noted that the valve seat divides the automatic oil replenisher 1 into an upper oil storage area and a lower oil replenishment area, and the lower part of the automatic oil replenisher 1 is connected to the lubrication pipeline 5.

[0038] When the oil level line 6 is kept at the preset horizontal height, the valve needle is located in the valve seat to form a sealing effect; when the liquid level in the installation position 2 drops, the liquid level in the lower part of the automatic oil replenisher 1 also drops, and the float of the float valve drops with the drop of the liquid level. The drop of the float drives the valve needle to leave the valve seat, thereby opening the passage so that the lubricating oil in the upper part of the automatic oil replenisher 1 flows into the lubrication pipeline 5.

[0039] When the oil is replenished to the required level, the liquid level at the bottom of the automatic oil replenisher 1 rises back to the preset height, the float also rises, and pushes the valve needle to close the passage and stop the oil supply.

[0040] Each mounting position 2 has an oil inlet 21, which connects the inner cavity of the mounting position 2 to the lubrication pipeline 5.

[0041] Oil is injected into the mounting position 2 through the oil inlet 21, so that the oil lubricates the bearing 3 located in the mounting position 2.

[0042] The automatic oil replenisher 1 is fixedly installed on the tamping equipment body via a bracket, and its installation position is higher than that of the bearing 3. By installing the automatic oil replenisher 1 above the bearing 3, when the oil level drops due to consumption, the pressure difference formed by the height difference of the liquid surface can quickly drive the oil to replenish, keeping the liquid level line 6 horizontal. No additional power pump or other devices are required, ensuring the timeliness and stability of oil replenishment provided by this device.

[0043] The oil level line 6 is located at 1 / 3 to 2 / 3 of the height of the rolling element 31 at the bottom of the bearing 3.

[0044] The lower limit of the oil level is the position of the oil level line 6 at 1 / 3 of the height of the rolling element 31 at the bottom of the bearing 3. This ensures that the rolling element 31 has sufficient contact surface to be immersed in the oil when rotating, thereby carrying enough oil to effectively splash lubricate and dissipate heat on all internal working surfaces of the bearing 3. This avoids insufficient lubrication and local overheating caused by low oil level.

[0045] The upper limit of the oil level is when the oil level line 6 is located at 2 / 3 of the height of the rolling element 31 at the bottom of the bearing 3. This can effectively prevent the oil level from being too high and avoid excessive oil immersion on the contact surface of the rolling element, which would lead to increased resistance, increased energy consumption, and reduced heat dissipation.

[0046] Preferably, the oil is immersed to half the height of the rolling element 31 below the bearing 3, ensuring that there is enough oil to be carried by the rolling element 31, while reducing the immersion area of ​​the rolling element 31 in the oil. This reduces the resistance during rotation and the heat generated when agitating the oil, improving transmission efficiency and further controlling the overall operating temperature of the bearing.

[0047] Because the eccentric shaft 4 generates a huge amount of heat during operation, such as Figure 3 As shown, the end of the eccentric shaft 4 away from the automatic oil replenisher 1 is connected to the flywheel 7. The flywheel 7 rotates with the eccentric shaft 4. During the rotation of the flywheel 7, air is drawn in and airflow is generated. The airflow is then delivered to the heat-generating part of the eccentric shaft 4, namely the bearing 3, and the heat generated by the bearing 3 is continuously carried away to achieve the purpose of cooling.

[0048] This invention achieves lubrication and heat dissipation of the entire bearing 3 by connecting the automatic oil replenisher 1 to each installation position in sequence through multiple lubrication pipelines 5. This invention is compact in installation, simple in structure, reliable in lubrication and heat dissipation, and reasonably priced, which greatly improves the service life of the bearing 3 and the operational stability of the equipment.

[0049] Example 2:

[0050] Please see Figure 1-5 A tamping eccentric shaft bearing heat dissipation device, according to embodiment 1, the mounting position 2 is box-shaped, the eccentric shaft 4 includes a main journal whose axis coincides with the rotation center line, and an eccentric journal whose axis deviates from the rotation center line, the axis of the main journal coincides with the horizontal center line of the mounting position 2.

[0051] During actual operation, the liquid level line 6 is located at 1 / 2 of the lowest rolling element 31 of the main journal. The static oil level line 6 in the mounting position 2 is located at the same level as the central axis of the lowest rolling element 31 of the bearing 3 at the main journal.

[0052] When the eccentric shaft rotates, the eccentric journal rotates to the lowest point, and the bearing 3 at that point moves to the lowest point. At this time, the rolling element 31 at that point is immersed in the oil to a depth greater than 1 / 2. When the eccentric journal rotates to the highest point, the rolling element 31 at that point is immersed in the oil to a depth less than 1 / 2.

[0053] The box-shaped structure of mounting position 2 provides a closed mounting space for bearing 3, eccentric shaft 4 and lubricating oil, ensuring that the force center of the rotating main journal of eccentric shaft 4 is consistent with the support center of the stationary mounting position 2. This avoids abnormal wear caused by the rotational force of the eccentric journal during actual operation, ensures the accuracy of the relative positions of each component, and improves the stability and service life of the entire transmission system.

[0054] The maximum outer diameter of bearing 3 is smaller than the width and height of mounting position 2, so as to form a safe clearance between bearing 3 and the inner wall of mounting position 2. This ensures that when bearing 3 is installed, there is sufficient radial space between the outer ring of bearing 3 and the inner wall of mounting position 2. It should be noted that the above-mentioned safe clearance provides the necessary conditions for lubricating oil to form an oil bath in the rolling elements 31 of bearing 3, while avoiding collision between bearing 3 and mounting position 2, thus ensuring the smooth operation of the device.

[0055] The bearing 3, mounted on the eccentric journal, rotates around the rotation center line of the eccentric shaft 4. The outer edge of its rotation path forms a circular motion trajectory. The width and height of the mounting position 2 are both greater than the diameter of the circular motion trajectory, thereby ensuring that the outer ring of the bearing 3 will not collide or rub against the inner wall of the housing of the mounting position 2 during the entire process of high-speed rotation, thus providing a guarantee for the safe and stable operation of the equipment.

Claims

1. A heat dissipation device for a tamped eccentric shaft bearing, characterized in that: The device includes an automatic oil replenisher, lubrication lines, and several mounting positions. The lubrication lines connect the automatic oil replenisher and the mounting positions. Each mounting position is equipped with a different bearing. The inner ring of each bearing is connected to the outer wall of an eccentric shaft. The inner cavities of the mounting positions and the inner cavity of the automatic oil replenisher form a communicating vessel structure. The bearing is provided with several rolling elements that convert sliding friction into rolling friction. The rolling elements at the bottom of the bearing are immersed in lubricating oil.

2. The heat dissipation device for a tamped eccentric shaft bearing according to claim 1, characterized in that: The automatic oil replenisher has an oil outlet at its bottom, which is connected to the lubrication pipeline. An automatic control valve is installed at the oil outlet to open and close the lubrication pipeline according to the liquid level.

3. The heat dissipation device for a tamped eccentric shaft bearing according to claim 2, characterized in that: The automatic control valve is a float valve, which includes a float, a valve needle, and a valve seat. The valve needle is installed in the valve seat, and the valve seat divides the automatic oil replenisher into an upper oil storage area and a lower oil replenishment area. The lower oil replenishment area is connected to the lubrication pipeline.

4. The heat dissipation device for a tamped eccentric shaft bearing according to claim 1, characterized in that: Each mounting position has an oil inlet, which connects the inner cavity of the mounting position to the lubrication pipeline.

5. The heat dissipation device for a tamped eccentric shaft bearing according to claim 1, characterized in that: The automatic oil replenisher is fixedly installed on the tamping equipment body by a bracket, and the installation position of the automatic oil replenisher is higher than the position of the bearing.

6. The heat dissipation device for a tamped eccentric shaft bearing according to claim 1, characterized in that: The oil level is located at 1 / 3 to 2 / 3 of the height of the rolling element at the bottom of the bearing.

7. A heat dissipation device for a tamped eccentric shaft bearing according to claim 6, characterized in that: The oil is immersed up to half the height of the rolling element below the bearing.

8. The heat dissipation device for a tamped eccentric shaft bearing according to claim 1, characterized in that: The mounting position is box-shaped, and the eccentric shaft includes a main journal whose axis coincides with the rotation center line, and an eccentric journal whose axis deviates from the rotation center line. The axis of the main journal coincides with the horizontal center line of the mounting position.

9. A heat dissipation device for a tamped eccentric shaft bearing according to claim 8, characterized in that: The maximum outer diameter of each bearing is smaller than the width and height of the mounting position.

10. A heat dissipation device for a tamped eccentric shaft bearing according to claim 9, characterized in that: The bearing mounted on the eccentric journal rotates around the rotation center line of the eccentric shaft, and the outer edge of its rotation path forms a circular motion trajectory. The width and height of the mounting position are both greater than the diameter of the circular motion trajectory.

Images