Centralized lubricating device for vertical mill bearings

Abstract

The utility model belongs to the technical field of bearing lubrication, and particularly relates to a vertical mill bearing centralized lubricating device, which comprises an oil supply component, a lubricating oil supply component, a lubricating oil supply component and a lubricating oil supply component, the conveying pipeline comprises a main pipe which is connected with the oil supply assembly and used for conveying the lubricating oil from the oil supply assembly to the follow-up flow dividing pipeline. The first branch pipe is communicated with the main pipe and is used for conveying the lubricating oil into the grinding roller bearing; the second branch pipe is communicated with the main pipe and is used for conveying the lubricating oil into the hydraulic cylinder bearing; the control system comprises a multi-way valve which is installed at the joint of the main pipe, the first branch pipe and the second branch pipe and used for changing the flow direction of lubricating oil through movement of an internal valve block. And the controller is used for adjusting the switching frequency and the action sequence of the multi-way valve according to a preset program, so that independent grease supplementing of the grinding roller bearing and the hydraulic cylinder bearing is realized, the whole lubricating process is orderly and efficiently carried out, manual intervention is reduced, and the lubricating efficiency is improved.

Description

A centralized lubrication device for vertical mill bearings Technical Field

[0001] This utility model belongs to the field of bearing lubrication technology, specifically relating to a centralized lubrication device for vertical mill bearings. Background Technology

[0002] In large industrial equipment, vertical roller mills are widely used in industries such as cement, power, metallurgy, and mining. Their operating efficiency and stability have a significant impact on production benefits. The grinding roller bearings and hydraulic cylinder bearings in vertical roller mills are key moving components that endure high loads and high speeds for extended periods. Their lubrication condition directly affects the equipment's operating efficiency, service life, and safety.

[0003] Traditional vertical mill bearing lubrication methods mostly rely on manual, periodic oiling. However, these methods have many drawbacks:

[0004] 1. High maintenance costs: Manual lubrication is not only labor-intensive, but also makes it difficult to ensure the timeliness and accuracy of lubrication, which increases equipment maintenance costs and downtime.

[0005] 2. Low level of intelligence: Traditional lubrication systems usually use periodic grease replenishment to bearings, lacking real-time monitoring and intelligent control of key parameters such as lubricating oil flow, pressure and bearing temperature, making it difficult to adjust the lubrication strategy in a timely manner according to the actual operating status of the equipment. Summary of the Invention

[0006] To address the above problems, the purpose of this utility model is to provide a centralized lubrication device for vertical mill bearings, thereby solving the problems mentioned in the background art.

[0007] This utility model provides a centralized lubrication device for vertical mill bearings, including an oil supply assembly as a lubricating oil supply source and for providing power to the entire lubrication device; a delivery pipeline including a main pipe connected to the oil supply assembly for delivering lubricating oil from the oil supply assembly to subsequent branch pipelines; a first branch pipe connected to the main pipe for delivering lubricating oil to the inside of the grinding roller bearing; a second branch pipe connected to the main pipe for delivering lubricating oil to the inside of the hydraulic cylinder bearing; a control system including a multi-way valve installed at the junction of the main pipe, the first branch pipe, and the second branch pipe for changing the flow direction of lubricating oil by moving the internal valve block; and a controller for adjusting the switching frequency and action sequence of the multi-way valve according to a preset program, thereby realizing independent grease replenishment for the grinding roller bearing and the hydraulic cylinder bearing.

[0008] Preferably, the oil supply assembly includes an oil tank for storing lubricating oil and is equipped with a level gauge to monitor the oil level; and an oil pump connected to the oil tank for drawing lubricating oil from the oil tank and pressurizing it to deliver it to the main pipe.

[0009] Preferably, the delivery pipeline further includes flow meters installed on each branch pipe, the flow meters being used to monitor the flow rate of lubricating oil delivered to each bearing and to transmit the monitored flow signal to the controller.

[0010] Preferably, the system also includes temperature sensors, which include a first temperature sensor mounted on a rocker arm connected to the grinding roller for monitoring the temperature of the grinding roller bearing and a second temperature sensor mounted on a tie rod between the grinding roller and the hydraulic cylinder for monitoring the temperature of the hydraulic cylinder bearing. The controller monitors the temperature sensors.

[0011] Preferably, the end of the first branch pipe away from the main pipe extends through the rocker arm into the interior of the grinding roller bearing housing, so that the lubricating oil entering the interior of the grinding roller bearing housing through the first branch pipe is evenly distributed under the action of the rotation of the grinding roller sleeve.

[0012] Preferably, the part of the pull rod that contacts the hydraulic cylinder bearing has a through-hole for the passage of the second branch pipe, and the outer wall of the second branch pipe has a plurality of drip holes for grease replenishment to the hydraulic cylinder bearing.

[0013] Preferably, the multi-way valve is an electric multi-way valve or a pneumatic multi-way valve, and its switching action is realized by the controller through an electric actuator or a pneumatic actuator.

[0014] The beneficial effects of this invention are as follows: Power and lubricating oil are provided through the oil supply assembly; the delivery pipeline is rationally distributed to different bearings; and the control system precisely controls the switching frequency and action sequence of the multi-way valve, thereby achieving independent grease replenishment for the grinding roller bearings and hydraulic cylinder bearings. This ensures the entire lubrication process is orderly and efficient, reducing manual intervention and improving lubrication efficiency. The oil supply, delivery, and control are integrated into a single, complete centralized lubrication device with a compact structure, facilitating installation and maintenance, and saving equipment space. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the isometric three-dimensional structure of this utility model;

[0016] Figure 2 is an enlarged structural schematic diagram of point A in this utility model;

[0017] Figure 3 is a top view of the structure of this utility model;

[0018] Figure 4 is a cross-sectional structural diagram of this utility model;

[0019] Figure 5 is an enlarged structural schematic diagram of point B in this utility model;

[0020] Figure 6 is a side view of the structure of this utility model;

[0021] Figure 7 is an enlarged structural diagram of point C in this utility model.

[0022] In the diagram: 1. Oil supply assembly; 2. Delivery pipeline; 3. Main pipe; 4. First branch pipe; 5. Grinding roller bearing; 6. Second branch pipe; 7. Hydraulic cylinder bearing; 8. Multi-way valve; 9. Controller; 10. Oil tank; 11. Oil pump; 12. Flow meter; 13. First temperature sensor; 14. Second temperature sensor; 15. Rocker arm; 16. Grinding roller bearing housing; 17. Grinding roller sleeve; 18. Channel; 19. Oil drip hole; 20. Hydraulic cylinder; 21. Grinding disc; 22. Electric motor. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0024] The electric motor 22 drives the grinding disc 21 to rotate through the reducer. The material falls from the feed port into the center of the grinding disc 21 through the airlock feeder. As the grinding disc 21 rotates, the material moves towards the edge of the grinding disc 21 under the action of centrifugal force. When it passes through the annular groove on the grinding disc 21, it is crushed by the grinding roller. The grinding roller applies sufficient pressure to the material under the pressure provided by the hydraulic system, so that the material is subjected to the combined action of squeezing and shearing, thereby achieving crushing. During the operation, the grinding roller needs to rotate relative to the rocker arm 15. If they are directly connected, the contact surface between the two will generate a large friction force, resulting in energy loss and equipment overheating. After the bearings are installed, the rolling elements (such as balls or rollers) inside the bearings can generate rolling friction between the grinding roller and the rocker arm 15. Compared with sliding friction, the resistance of rolling friction is greatly reduced, thereby reducing energy consumption and equipment wear. In addition, there is relative movement at the connection between the rocker arm 15 and the hydraulic cylinder 20. When in direct contact, the sliding friction resistance is large. By installing the bearings, the sliding friction is converted into rolling friction, the friction coefficient is significantly reduced, and energy loss is reduced. The bearings achieve low-friction transmission through the rolling elements (such as balls or rollers), improving energy transmission efficiency. The output power of the hydraulic cylinder 20 is more efficiently converted into the swinging or lifting motion of the rocker arm 15, and the equipment response speed is accelerated. The bearing between the rocker arm 15 and the grinding roller is called the grinding roller bearing 5, and the bearing between the rocker arm 15 and the hydraulic cylinder 20 is called the hydraulic cylinder bearing 7. As key moving parts, the grinding roller bearing 5 and the hydraulic cylinder bearing 7 in the vertical mill are subjected to high load and high speed conditions for a long time. Their lubrication status is directly related to the operating efficiency, service life and safety of the equipment. Traditional vertical mill bearing lubrication methods mostly use manual periodic oiling. However, these methods have many drawbacks: 1. High maintenance costs: Manual lubrication is not only labor-intensive, but also makes it difficult to guarantee the timeliness and accuracy of lubrication, increasing equipment maintenance costs and downtime. 2. Low level of intelligence: Traditional lubrication systems usually use periodic grease replenishment of bearings, lacking real-time monitoring and intelligent control of key parameters such as lubricating oil flow, pressure, and bearing temperature, making it difficult to adjust lubrication strategies in a timely manner according to the actual operating status of the equipment.

[0025] To address the aforementioned technical problems, as shown in Figures 1-7, this utility model provides a centralized lubrication device for vertical mill bearings, including an oil supply assembly 1, a delivery pipeline, and a control system. Specifically, the oil supply assembly 1 includes an oil tank 10 for storing lubricating oil and an oil pump 11 connected to the oil tank 10 for drawing lubricating oil from the oil tank 10 and pressurizing and delivering it to the delivery pipeline. A level gauge is also installed on the oil tank 10 to monitor the oil level and promptly remind workers to add oil. The delivery pipeline is divided into three parts: a main pipe 3 connected to the oil pump 11; a first branch pipe 4 connected to the main pipe 3 for delivering lubricating oil to the inside of the grinding roller bearing 5; and a second branch pipe 6 connected to the main pipe 3 for delivering lubricating oil to the inside of the hydraulic cylinder bearing 7, as shown in Figure 1. The main pipe 3 is circular and surrounds the outer shell of the vertical mill. At each grinding roller, there are first branch pipes 4 and second branch pipes 6. The lubricating oil delivered from the main pipe 3 can be delivered to the grinding roller bearing 5 and the hydraulic cylinder bearing 7 through the first branch pipes 4 and the second branch pipes 6, respectively, as shown in Figures 3-4. When the lubricating oil reaches the inside of the grinding roller bearing seat 16 through the first branch pipe 4 and is sprayed out, the lubricating oil is evenly distributed inside the grinding roller bearing 5 as the grinding roller bearing 5 rotates, as shown in Figure 5. When the lubricating oil is guided along the second branch pipe 6 to the connection between the rocker arm 15 and the hydraulic cylinder bearing 7, it drips onto the hydraulic cylinder bearing 7 through the oil drip hole 19 and slides down the hydraulic cylinder bearing 7 under the action of gravity. At the same time, the lubricating oil is distributed at the hydraulic cylinder bearing 7 as the rocker arm 15 moves.To facilitate control over the frequency of lubrication of the grinding roller bearing 5 and the hydraulic cylinder bearing 7, flow meters 12 are installed on each branch pipe. The flow meters 12 are used in conjunction with the control system, which includes a controller 9 and a multi-way valve 8 installed at the junction of the main pipe 3, the first branch pipe 4, and the second branch pipe 6. The multi-way valve 8 is electrically or pneumatically driven and switched by the controller 9 through a corresponding actuator. The controller 9 adjusts the switching frequency and sequence of the multi-way valve 8 according to a preset program, thereby achieving independent lubrication of the grinding roller bearing 5 and the hydraulic cylinder bearing 7. Specifically, during initial use, both the hydraulic cylinder bearing 7 and the grinding roller bearing 5 need to be lubricated simultaneously. The controller 9 turns on the oil pump 11 and opens the valve port of the multi-way valve 8 leading to the first branch pipe 4, allowing lubricating oil to enter the interior of each grinding roller bearing 5 along the main pipe 3 and the first branch pipe 4. When the flow meter on a certain first branch pipe 4... When the flow meter 12 detects that the lubricating oil received by the corresponding grinding roller bearing 5 has reached the preset amount, it closes the valve port of the multi-way valve 8 corresponding to the grinding roller bearing 5 leading to the first branch pipe 4. When the values ​​monitored by the flow meters 12 corresponding to all grinding roller bearings 5 ​​reach the preset threshold, the controller 9 controls the valve ports of each multi-way valve 8 corresponding to the first branch pipe 4 to close, and opens the valve port of the multi-way valve 8 leading to the second branch pipe 6, so that the lubricating oil flows along the main pipe 3 to the second branch pipe 6 and reaches the hydraulic cylinder bearing 7. When the flow meter 12 on a certain second branch pipe 6 detects that the lubricating oil received by the corresponding hydraulic cylinder bearing 7 has reached the preset amount, it closes the valve port of the multi-way valve 8 corresponding to the hydraulic cylinder bearing 7 leading to the second branch pipe 6. When the values ​​monitored by the flow meters 12 corresponding to all hydraulic cylinder bearings 7 reach the preset threshold, the controller 9 controls the valve ports of each multi-way valve 8 corresponding to the second branch pipe 6 to close, and shuts down the oil pump 11 to end the grease replenishment. Because the lubrication intervals for the grinding roller bearing 5 and the hydraulic cylinder bearing 7 are usually different, and their lubrication intervals are affected by various factors, the lubrication interval for the grinding roller bearing 5 is affected by conditions such as rotational speed, operating temperature, and load. For example, under high speed, high temperature, or heavy load conditions, the grease ages faster, and the lubrication interval needs to be shortened; while the lubrication interval for the hydraulic cylinder bearing 7 is affected by factors such as pressure, frequency, and ambient temperature. For example, high-pressure, high-frequency operation or high-temperature environments will accelerate grease aging, requiring a shorter lubrication interval. In use, the lubrication interval needs to be adjusted according to the operating conditions of each bearing. When only the grinding roller bearing 5 is lubricated, the controller 9 only opens the valve ports of the first branch pipe 4 corresponding to each multi-way valve 8 during the lubrication period. When only the hydraulic cylinder bearing 7 is lubricated, the controller 9 only opens the valve ports of the second branch pipe 6 corresponding to each multi-way valve 8 during the lubrication period, thereby achieving independent lubrication for the grinding roller bearing 5 and the hydraulic cylinder bearing 7.

[0026] Furthermore, as shown in Figures 2-5, during use, to facilitate timely monitoring of the working status of each bearing, a first temperature sensor 13 is installed on the rocker arm 15 connected to the grinding roller to monitor the temperature of the grinding roller bearing 5; a second temperature sensor 14 is installed on the tie rod between the grinding roller and the hydraulic cylinder 20 to monitor the temperature of the hydraulic cylinder bearing 7. The first and second temperature sensors 13 and 14 can be non-contact sensors, such as infrared thermometers. The controller 9 is equipped with a human-machine interface, which provides an intuitive operating interface, allowing operators to easily set lubrication parameters and lubrication intervals for each bearing, view the temperature values ​​of the temperature sensors, and monitor lubrication. The controller 9 connects the first temperature sensor 13 and the second temperature sensor 14 to perform operations such as checking the sliding state, viewing historical records, and diagnosing faults. The controller 9 can dynamically control the operating status of the oil pump 11 and the multi-way valve 8 based on the temperature signals monitored by the first temperature sensor 13 and the second temperature sensor 14. Specifically, when the first temperature sensor 13 detects that the temperature of the grinding roller bearing 5 exceeds the preset temperature threshold, the controller 9 controls the oil pump 11 to run and opens the valve of the multi-way valve 8 to the first branch pipe 4 to replenish the grease to the grinding roller bearing 5 in a timely manner. For example, under normal conditions, the temperature of the grinding roller bearing 5 is between 60 and 80 degrees Celsius. When the grinding roller bearing 5 is short of oil, the temperature can rise to about 120 degrees Celsius in a short time.

Claims

1. A centralized lubrication device for vertical mill bearings, characterized in that, include: The oil supply assembly (1) serves as a source of lubricating oil and provides power to the entire lubrication system. The delivery pipeline (2) includes: a main pipe (3) connected to the oil supply assembly (1) for delivering lubricating oil from the oil supply assembly (1) to the subsequent branch pipeline; a first branch pipe (4) connected to the main pipe (3) for delivering lubricating oil to the inside of the grinding roller bearing (5); and a second branch pipe (6) connected to the main pipe (3) for delivering lubricating oil to the inside of the hydraulic cylinder bearing (7). The control system includes: a multi-way valve (8) installed at the junction of the main pipe (3), the first branch pipe (4), and the second branch pipe (6) for changing the flow direction of lubricating oil by moving the internal valve block; and a controller (9) for adjusting the switching frequency and action sequence of the multi-way valve (8) according to a preset program, thereby realizing independent grease replenishment of the grinding roller bearing (5) and the hydraulic cylinder bearing (7).

2. The centralized lubrication device for vertical mill bearings according to claim 1, characterized in that: The oil supply assembly (1) includes: an oil tank (10) for storing lubricating oil and equipped with a level gauge to monitor the oil level; and an oil pump (11) connected to the oil tank (10) for drawing lubricating oil from the oil tank (10) and pressurizing it to deliver it to the main pipe (3).

3. The centralized lubrication device for vertical mill bearings according to claim 1, characterized in that: The delivery pipeline (2) also includes flow meters (12) installed on each branch pipe. The flow meters (12) are used to monitor the flow rate of lubricating oil delivered to each bearing and transmit the monitored flow signal to the controller (9).

4. The centralized lubrication device for vertical mill bearings according to claim 1, characterized in that: It also includes temperature sensors, including a first temperature sensor (13) mounted on a rocker arm (15) connected to the grinding roller and used to monitor the temperature of the grinding roller bearing (5) and a second temperature sensor (14) mounted on a tie rod between the grinding roller and the hydraulic cylinder (20) and used to monitor the temperature of the hydraulic cylinder bearing (7). The controller (9) dynamically controls the operation of the oil pump (11) and the multi-way valve (8) based on the temperature signals monitored by the first temperature sensor (13) and the second temperature sensor (14).

5. A centralized lubrication device for vertical mill bearings according to claim 1, characterized in that: The end of the first branch pipe (4) away from the main pipe (3) extends through the rocker arm (15) into the interior of the grinding roller bearing seat (16), so that the lubricating oil entering the interior of the grinding roller bearing seat (16) through the first branch pipe (4) is evenly distributed under the action of the rotation of the grinding roller sleeve (17).

6. A centralized lubrication device for vertical mill bearings according to claim 4, characterized in that: The part of the pull rod that contacts the hydraulic cylinder bearing (7) has a channel (18) through which the second branch pipe (6) passes. The outer wall of the second branch pipe (6) has multiple drip holes (19) evenly distributed to replenish grease to the hydraulic cylinder bearing (7).

7. A centralized lubrication device for vertical mill bearings according to claim 1, characterized in that: The multi-way valve (8) is an electric multi-way valve (8) or a pneumatic multi-way valve (8), and its switching action is realized by the controller (9) through an electric actuator or a pneumatic actuator.

Images