An emergency shutdown device for a fault of a thin oil lubricated bearing
By designing an emergency shutdown device for thin oil lubricated bearing failures, the system utilizes a high-level oil tank and a fault responder to achieve automatic lubricant delivery and shutdown. This solves the problem of the inability to shut down the thin oil lubricated bearing system in a timely manner when a failure occurs, reduces the risk of bearing damage and safety accidents, and improves the reliability of the system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANDAN IRON & STEEL GROUP CO LTD
- Filing Date
- 2025-08-12
- Publication Date
- 2026-08-04
AI Technical Summary
Existing thin oil lubricated bearing systems cannot be shut down in time when a failure occurs, resulting in a high risk of bearing damage and safety accidents. Furthermore, existing optimized designs cannot completely prevent lubrication system failures.
Design an emergency shutdown device for thin oil lubricated bearing failure, including components such as a high-level oil tank, a fault responder, and limit switches. The device achieves automatic delivery of lubricating oil through the oil outlet pipe and the overflow pipe of the high-level oil tank, and automatically shuts down the machine when the lubrication system fails.
It enables timely shutdown in case of bearing lubrication system failure, prevents bearing damage, reduces the risk of safety accidents, has a simple structure, low operating costs, safe operation, convenient maintenance, and improves the reliability of bearing operation.
Smart Images
Figure CN224592405U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an emergency shutdown device for a bearing that fails due to a thin oil lubrication system, and belongs to the technical field of thin oil bearing lubrication equipment. Background Technology
[0002] Bearings are one of the key components for the operation of a fan. A reliable lubrication system must be designed during the operation of the bearings to ensure the safe and reliable continuous operation of all components of the fan.
[0003] The safe and reliable operation of the bearing lubrication system directly affects the operational safety of the fan. Therefore, the probability of lubrication system failure can be reduced by optimizing the design of pipeline joints, improving the reliability of equipment such as oil pumps and radiators, designing double-redundant oil pumps, and increasing and optimizing pipeline maintenance and inspection cycles.
[0004] Due to the unique external piping design of bearing lubrication systems, and the characteristics of daily inspection and periodic disassembly and maintenance, although the reliability of the lubrication system has been greatly improved through redundant design of the lubricating oil pump and reliable design of other components on the lubricating oil pipeline, some limitations still exist, and it is still impossible to completely eliminate the occurrence of lubrication system failures caused by external factors. Once a bearing lubrication system fails, the bearing will experience dry friction, which will not only damage the bearing, but more seriously, cause the connected parts of the bearing to stop rotating, potentially leading to a serious safety accident. In this situation, an emergency shutdown must be performed immediately to avoid significant losses to the company. Bearing lubrication system failures mostly occur due to unreliable external piping interface connections, wear and loosening of interface fasteners under harsh working environments, or untimely maintenance. Although pipeline reliability has been greatly improved through optimized design, it is still difficult to completely eliminate lubrication failure events due to factors such as continuous operation of the fan. Therefore, it is essential to design an emergency shutdown device for failures in thin oil-lubricated bearings to ensure the safety of the fan. Utility Model Content
[0005] The technical problem to be solved by this utility model is to provide an emergency shutdown device for a thin oil lubricated bearing failure. This device can shut down the machine in a timely manner when the bearing lubrication system fails, and ensure good lubrication of the fan bearing during the shutdown process.
[0006] The technical solution to the above technical problem is:
[0007] An emergency shutdown device for a thin oil-lubricated bearing failure includes an oil inlet pipe, an oil return pipe, a main oil tank, a main oil tank supply pipe, and an oil pump. The oil inlet pipe and the oil return pipe are respectively connected to the bearing lubrication channels at both ends of the fan. The oil inlet end of the oil inlet pipe is connected to the main oil tank supply pipe, and the oil outlet end of the oil return pipe is connected to the oil return port on the top surface of the main oil tank. The oil pump is installed in the main oil tank supply pipe. The device also includes an elevated oil tank, an elevated oil tank outlet pipe, a overflow pipe, and a fault responder. The elevated oil tank is located above the fan and the bearing. The elevated oil tank outlet pipe is connected to the connection between the oil inlet pipe and the main oil tank supply pipe. The upper end of the overflow pipe is connected to the upper part of the elevated oil tank, and the lower end of the overflow pipe is connected to the overflow port on the top surface of the main oil tank. The fault responder is installed in the elevated oil tank outlet pipe.
[0008] The emergency shutdown device for the aforementioned thin oil lubricated bearing failure comprises a fault responder consisting of a limit switch, a swing disk, and a swing rod. The wall of the high-level oil tank outlet pipe has a swing hole, which is tapered. The smaller diameter end of the swing hole is located on the inner wall of the high-level oil tank outlet pipe, and the larger diameter end is located on the outer wall. The swing rod is embedded in the swing hole, and its diameter matches the diameter of the smaller diameter end of the swing hole. The swing rod and the swing hole are in a rotating fit. The swing disk is located in the cavity of the high-level oil tank outlet pipe, and its diameter is smaller than the inner diameter of the high-level oil tank outlet pipe. The swing disk is placed horizontally and fixedly connected to one end of the swing rod. The limit switch is fixed to the outside of the high-level oil tank outlet pipe, and its trigger rod is connected to the other end of the swing rod. The signal wire of the limit switch is connected to the fan switch.
[0009] The emergency shutdown device for the above-mentioned thin oil lubricated bearing failure includes a check valve installed in the main oil tank oil delivery pipe, with the check valve located between the oil pump and the main oil tank.
[0010] The emergency shutdown device for the above-mentioned thin oil lubricated bearing failure has an exhaust valve installed on the top surface of the high-level oil tank, and a flow control valve and a sight glass installed in the overflow pipe between the high-level oil tank and the main oil tank.
[0011] The beneficial effects of this utility model are:
[0012] Under normal circumstances, the main oil tank of this invention provides thin oil lubrication to the bearings at both ends of the fan through the upper oil pipe and the return oil pipe. When the thin oil lubrication system fails, the oil pump stops working, and the oil in the high-level oil tank flows out through the high-level oil tank outlet pipe into the upper oil pipe to lubricate the bearings at both ends of the fan, preventing the bearings from being damaged due to lack of lubrication and causing safety failures. When the oil in the high-level oil tank outlet pipe flows downward, it drives the swing disk and swing rod to rotate. The swing of the swing rod causes the limit switch to activate, thereby stopping the fan.
[0013] This utility model has the advantages of simple structure, low operating cost, safe operation, convenient maintenance, and improved bearing reliability. It greatly reduces bearing damage caused by lubrication system failure, prevents safety accidents caused by bearing damage, and enables timely emergency shutdown, avoiding significant losses to enterprises. It is worthy of promotion and application in the industry. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model;
[0015] Figure 2 This is a schematic diagram of the normal operating state of the fault responder;
[0016] Figure 3 This is a schematic diagram of the emergency stop state of the fault responder.
[0017] The following components are marked in the diagram: 1. Fan; 2. Bearing; 3. Upper oil pipe; 4. Return oil pipe; 5. Main oil tank; 6. Main oil tank oil supply pipe; 7. Oil pump; 8. High-level oil tank; 9. High-level oil tank outlet pipe; 10. Drainage pipe; 11. Fault response device; 12. Check valve; 13. Exhaust valve; 14. Flow control valve; 15. Inspector; 16. Swing hole; 17. Limit switch; 18. Swing disc; 19. Swing rod. Detailed Implementation
[0018] This utility model consists of an upper oil pipe 3, a return oil pipe 4, a main oil tank 5, a main oil tank oil delivery pipe 6, an oil pump 7, a high-level oil tank 8, a high-level oil tank outlet pipe 9, a diffuser pipe 10, a fault responder 11, a check valve 12, an exhaust valve 13, a flow control valve 14, and a sight glass 15.
[0019] Figure 1 As shown, this utility model consists of an upper oil pipe 3, a return oil pipe 4, a main oil tank 5, a main oil tank oil delivery pipe 6, an oil pump 7, and a check valve 12, forming a bearing thin oil lubrication circuit under normal conditions.
[0020] Figure 1 The upper oil pipe 3 and the return oil pipe 4 are connected to the bearing lubrication channels at both ends of the blower 1, respectively. The oil inlet end of the upper oil pipe 3 is connected to the main oil tank supply pipe 6, and the oil outlet end of the return oil pipe 4 is connected to the return port on the top surface of the main oil tank 5. The oil pump 7 and the check valve 12 are installed in the main oil tank supply pipe 6. The lubricating oil in the main oil tank 5 lubricates the bearings 2 at both ends of the blower 1 through the main oil tank supply pipe 6, the upper oil pipe 3, and the return oil pipe 4.
[0021] Figure 1 The emergency shutdown section of this utility model includes a high-level oil tank 8, a high-level oil tank outlet pipe 9, a spillway pipe 10, a fault responder 11, an exhaust valve 13, a flow control valve 14, and a sight glass 15.
[0022] Figure 1The display shows that the high-level oil tank 8 is located above the fan 1 and the bearing 2, and an exhaust valve 13 is installed on the top surface of the high-level oil tank 8 to discharge excess gas in the high-level oil tank 8.
[0023] Figure 1 The display shows that the high-level oil tank 8's high-level oil tank outlet pipe 9 is connected to the connection between the upper oil pipe 3 and the main oil tank oil supply pipe 6, and is used to supply lubricating oil to the upper oil pipe 3 when the lubrication system fails.
[0024] Figure 1 The overflow pipe 10 is connected at its upper end to the upper part of the high-level oil tank 8, and at its lower end to the overflow port on the top surface of the main oil tank 5. When the high-level oil tank 8 is full, excess oil flows back to the main oil tank 5 through the overflow pipe 10. A flow control valve 14 and a sight glass 15 are installed in the overflow pipe 10.
[0025] Figure 1 The display shows that the fault responder 11 is installed in the oil outlet pipe of the high-level oil tank 8. When a lubrication system failure occurs, it supplies lubricating oil to the upper oil pipe 3 to prevent the bearing 2 from being damaged due to lack of lubrication and to prevent safety failures. At the same time, it shuts down the fan 1 in a timely manner.
[0026] Figure 2 , 3 The fault responder 11 consists of a limit switch 17, a swing disk 18, and a swing rod 19. The wall of the high-level oil tank outlet pipe 9 has a swing hole 16, which is a conical hole. The smaller diameter end of the swing hole 16 is located on the inner wall of the high-level oil tank outlet pipe 9, and the larger diameter end is located on the outer wall of the high-level oil tank outlet pipe 9. The swing rod 19 is embedded in the swing hole 16, and the diameter of the swing rod 19 matches the diameter of the smaller diameter end of the swing hole 16. The swing rod 19 and the swing hole 16 are in a rotating fit. With this structure, the swing rod 19 can swing up and down in the swing hole 16 to activate the limit switch 17.
[0027] Figure 2 , 3 The display shows that the swing disk 18 is located in the cavity of the high-level oil tank outlet pipe 9. The diameter of the swing disk 18 is smaller than the inner diameter of the high-level oil tank outlet pipe 9. The swing disk 18 is placed horizontally and is fixedly connected to one end of the swing rod 19. When the oil in the high-level oil tank outlet pipe 9 flows in reverse, the oil can drive the swing disk 18 to move in the opposite direction, thereby causing the swing rod 19 to swing.
[0028] Figure 2 , 3The limit switch 17 is fixed to the outside of the oil outlet pipe 9 of the high-level oil tank. The trigger rod of the limit switch 17 is connected to the other end of the swing rod 19, and the signal wire of the limit switch 17 is connected to the switch of the fan 1. When the swing rod 19 swings to the upper or lower position, the swing rod 19 can open or close the limit switch 17, thereby controlling the start and stop of the fan 1.
[0029] The working process of this utility model is as follows:
[0030] Under normal lubrication conditions, a portion of the oil enters the high-level oil tank 8 through the upper oil pipe 3. When the high-level oil tank 8 is full of oil, the excess oil flows back to the main oil tank 5 through the overflow pipe 10, the flow control valve 14, and the sight glass 15.
[0031] When the lubrication system fails, the oil pump 7 stops working, and the oil in the high-level oil tank 8 will enter the upper oil pipe 3 through the fault responder 11 to lubricate the bearing 2. The lubricated oil will return to the main oil tank 5 through the return oil pipe 4. At the same time, when the oil in the high-level oil tank 8 passes through the fault responder 11, the oil can drive the swing disk 18 to move downward, and the swing rod 19 will drive the limit switch 17 to operate, thus stopping the fan 1.
[0032] An embodiment of this utility model is as follows:
[0033] The main fuel tank 5 has a volume of 4m³. 3 ;
[0034] The volume of the high-level oil tank 8 is 1m³. 3 ;
[0035] The diameter of the upper oil pipe 3 is 50mm;
[0036] The diameter of return oil pipe 4 is 50mm;
[0037] The diameter of the oil outlet pipe 9 in the high-level oil tank is 20mm;
[0038] The diameter of the overflow pipe 10 is 50 mm.
Claims
1. An emergency shutdown device for a thin oil lubricated bearing failure, comprising an oil inlet pipe (3), an oil return pipe (4), a main oil tank (5), a main oil tank oil delivery pipe (6), and an oil pump (7), wherein the oil inlet pipe (3) and the oil return pipe (4) are respectively connected to the bearing lubrication channels at both ends of the fan (1), the oil inlet end of the oil inlet pipe (3) is connected to the main oil tank oil delivery pipe (6), the oil outlet end of the oil return pipe (4) is connected to the oil return port on the top surface of the main oil tank (5), and the oil pump (7) is installed in the main oil tank oil delivery pipe (6), characterized in that: It also has a high-level oil tank (8), a high-level oil tank outlet pipe (9), a overflow pipe (10), and a fault responder (11). The high-level oil tank (8) is located above the fan (1) and the bearing (2). The high-level oil tank outlet pipe (9) is connected to the connection between the upper oil pipe (3) and the main oil tank oil supply pipe (6). The upper end of the overflow pipe (10) is connected to the upper part of the high-level oil tank (8). The lower end of the overflow pipe (10) is connected to the overflow port on the top surface of the main oil tank (5). The fault responder (11) is installed in the high-level oil tank outlet pipe (9).
2. An emergency shutdown device for a failed oil lubricated bearing according to claim 1, characterized in that: The fault responder (11) consists of a limit switch (17), a swing disk (18), and a swing rod (19). The high-level oil tank outlet pipe (9) has a swing hole (16) on its wall. The swing hole (16) is a conical hole. The small-diameter end of the swing hole (16) is located on the inner wall of the high-level oil tank outlet pipe (9), and the large-diameter end of the swing hole (16) is located on the outer wall of the high-level oil tank outlet pipe (9). The swing rod (19) is embedded in the swing hole (16), and the diameter of the swing rod (19) matches the diameter of the small-diameter end of the swing hole (16). (19) is in rotational engagement with the swing hole (16). The swing disk (18) is located in the cavity of the oil outlet pipe (9) of the high-level oil tank. The diameter of the swing disk (18) is smaller than the inner diameter of the oil outlet pipe (9) of the high-level oil tank. The swing disk (18) is placed horizontally. The swing disk (18) is fixedly connected to one end of the swing rod (19). The limit switch (17) is fixed outside the oil outlet pipe (9) of the high-level oil tank. The trigger rod of the limit switch (17) is connected to the other end of the swing rod (19). The signal wire of the limit switch (17) is connected to the switch of the fan (1).
3. An emergency shutdown device for a failed oil lubricated bearing according to claim 1, characterized in that: A check valve (12) is installed in the main oil tank oil delivery pipe (6), and the check valve (12) is located between the oil pump (7) and the main oil tank (5).
4. The emergency shutdown device for a failed oil lubricated bearing according to claim 1, characterized in that: An exhaust valve (13) is installed on the top surface of the high-level oil tank (8), and a flow control valve (14) and a sight glass (15) are installed in the overflow pipe (10) between the high-level oil tank (8) and the main oil tank (5).