A lubricating oil supply station for a blower

Abstract

The utility model discloses a kind of lubricating oil oil supply station for induced draft fan, belong to the technical field of boiler auxiliary machinery of thermal power plant.The oil supply station includes oil tank, induced draft fan oil pump, lubricating oil filtering device, automatic regulating hydraulic control oil circuit, double cooler, lubricating oil control valve group, system safety valve group and local control box.Induced draft fan oil pump pumps out oil from oil tank, in turn after filtering, hydraulic pressure adjustment, cooling, by lubricating oil control valve group is divided into two ways, respectively to induced draft fan motor bearing and fan bearing provide pressure stable, temperature suitable lubricating oil.The utility model uses joint oil station design, realizes to meet bearing lubrication and blade adjustment function simultaneously with one oil product, compact structure.It is through forced circulation lubrication and high efficiency cooling, effectively controls bearing temperature, overcomes the drawbacks of traditional lubricating grease lubrication, system built-in safety valve group guarantees pressure safety, significantly improves the reliability and stability of induced draft fan operation.

Description

Technical Field

[0001] This utility model relates to the field of thermal power plant technology, and in particular to a lubricating oil supply station for induced draft fans. Background Technology

[0002] In thermal power plants, induced draft fans are key equipment for ensuring the safe and stable operation of boilers. Reliable lubrication of their bearings is crucial for the long-term stable operation of the induced draft fan. Currently, traditional induced draft fan oil stations typically only lubricate the front and rear bearings of the fan motor, while the fan body bearings require periodic manual grease addition. This traditional method has significant drawbacks: First, the amount of grease added depends entirely on the operator's experience, making precise control difficult. Adding too much grease can increase bearing friction and hinder heat dissipation, leading to abnormally high bearing temperatures, potentially burning out the bearings and causing equipment failure. Second, grease has relatively poor lubrication and cooling effects, unlike lubricating oil which provides circulating cooling, resulting in harsh bearing conditions. Third, the independent grease addition system is separate from the hydraulic system for adjusting the induced draft fan blades, making the entire lubrication system complex, space-consuming, and inconvenient to maintain. These problems collectively affect the operational reliability and safety of the induced draft fan and even the entire boiler system. Utility Model Content

[0003] The purpose of this invention is to provide a lubricating oil supply station for induced draft fans, which solves the problems of poor lubrication effect, poor bearing temperature controllability, system complexity and low reliability in existing induced draft fan lubrication systems.

[0004] This utility model is achieved using the following technical solution: a lubricating oil supply station for an induced draft fan, characterized in that it includes an oil tank, an induced draft fan oil pump, an automatic regulating hydraulic control oil circuit, oil circuits for the front and rear bearings of the induced draft fan motor, an induced draft fan bearing oil circuit, a No. 1 cooler, a No. 2 cooler, a lubricating oil filter, a lubricating oil control valve group, a system safety valve group, a local control box, and a temperature sensor; the inlet of the induced draft fan oil pump is connected to the oil tank, and the outlet is connected sequentially to the lubricating oil filter, the automatic regulating hydraulic control oil circuit, the No. 1 cooler, and the No. 2 cooler via pipelines; the inlet of the lubricating oil control valve group is connected to the outlet pipeline of the No. 2 cooler, and its outlet is divided into two paths, which are respectively connected to the oil circuits for the front and rear bearings of the induced draft fan motor and the induced draft fan bearing oil circuit; the system safety valve group is connected in parallel to the outlet pipeline of the induced draft fan oil pump; the temperature sensor is installed inside the oil tank for detecting oil temperature; the local control box is electrically connected to the induced draft fan oil pump, the No. 1 cooler, the No. 2 cooler, and the temperature sensor.

[0005] Furthermore, the No. 1 cooler and the No. 2 cooler are connected in series to cool the lubricating oil together.

[0006] Furthermore, the No. 1 cooler and the No. 2 cooler are a dual-cooler structure connected in parallel, working together to control the lubricating oil temperature within a preset range.

[0007] Furthermore, the inlet end of the system safety valve assembly is connected to the outlet pipeline of the induced draft fan oil pump, and its outlet end is connected to the return oil tank. When the pump outlet oil pressure is higher than the set value, the pressure relief valve is opened.

[0008] Furthermore, the lubricating oil control valve assembly is used to regulate the lubricating oil pressure supplied to the front and rear bearing oil circuits of the induced draft fan motor and the induced draft fan bearing oil circuit.

[0009] Furthermore, the automatic adjustment hydraulic control circuit is used to meet the hydraulic requirements for adjusting the induced draft fan blades.

[0010] Furthermore, the local control box receives signals from the temperature sensor and automatically controls the operating status of cooler No. 1 and cooler No. 2 based on the signals.

[0011] The lubricating oil supply station for an induced draft fan described in this utility model has the following advantages: This utility model innovatively adopts a "three-in-one" combined oil supply scheme, which can simultaneously meet the hydraulic needs of induced draft fan motor bearing lubrication, fan bearing lubrication, and induced draft fan blade adjustment using only one oil station and one type of oil. This greatly simplifies the system structure, makes the oil station layout compact, and significantly reduces the floor space required.

[0012] By forcibly circulating lubricating oil and subjecting it to fine filtration and dual cooling, this method completely replaces the traditional method of periodically adding grease. The lubricating oil effectively removes heat from the bearing and is continuously cooled by the cooler, keeping the bearing temperature within a controllable and excellent range, thus solving bearing temperature rise problems caused by grease issues.

[0013] The system is equipped with a lubricating oil control valve assembly and a system safety valve assembly, which can precisely regulate and stabilize the pressure in the lubrication pipeline, and automatically release pressure in case of overpressure to protect the system safety. Automated control logic ensures the stability and reliability of the oil supply process.

[0014] With the local control box and temperature sensor, the automatic start-up and shutdown of the gas station and the automatic adjustment of the cooling system can be realized, reducing manual intervention, lowering maintenance costs and workload, and improving the level of intelligent equipment management. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 A schematic diagram of a lubricating oil supply station for an induced draft fan; In the diagram: 1. Exhaust fan oil pump; 2. Automatic regulating hydraulic control oil circuit; 3. Exhaust fan motor front and rear bearing oil circuit; 4. Exhaust fan bearing oil circuit; 5. Cooler No. 1; 6. Cooler No. 2; 7. Lubricating oil filter device; 8. Lubricating oil control valve group; 9. System safety valve group; 10. Local control box; 11. Temperature sensor. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. Example

[0019] like Figure 1As shown, this embodiment provides a lubricating oil supply station for an induced draft fan, mainly composed of an oil tank, an induced draft fan oil pump 1, an automatic regulating hydraulic control oil circuit 2, oil circuits for the front and rear bearings of the induced draft fan motor 3, oil circuits for the induced draft fan bearings 4, a No. 1 cooler 5, a No. 2 cooler 6, a lubricating oil filter device 7, a lubricating oil control valve group 8, a system safety valve group 9, a local control box 10, and a temperature sensor 11. The oil tank stores lubricating oil. The inlet of the induced draft fan oil pump 1 is connected to the bottom of the oil tank via a pipe, and the outlet of the induced draft fan oil pump 1 is connected sequentially via pipes to the lubricating oil filter device 7, the automatic regulating hydraulic control oil circuit 2, the No. 1 cooler 5, and the No. 2 cooler 6. The inlet of the lubricating oil control valve group 8 is connected to the outlet of the No. 2 cooler 6 via a pipe, and the outlet of the lubricating oil control valve group 8 is divided into two paths: one path is connected via a pipe to the front and rear bearing oil circuits of the induced draft fan motor 3, and the other path is connected via a pipe to the induced draft fan bearing oil circuit 4. The system safety valve assembly 9 is connected to the outlet pipe of the induced draft fan oil pump 1 via a parallel pipeline; that is, the inlet of the system safety valve assembly 9 is connected to the outlet pipe of the induced draft fan oil pump 1, and the outlet is connected back to the oil tank. The temperature sensor 11 is installed inside or on the outer casing of the oil tank to monitor the lubricating oil temperature in the tank in real time. The local control box 10 is connected to the induced draft fan oil pump 1, cooler 5 (No. 1), cooler 6 (No. 2), lubricating oil control valve assembly 8, and temperature sensor 11 via electrical wiring to realize the start-up and shutdown operation and automatic control of the oil station.

[0020] The working principle of the lubricating oil supply station is as follows: When the induced draft fan starts, the induced draft fan oil pump 1 is activated through the local control box 10, and the oil pump draws lubricating oil from the oil tank. The lubricating oil first passes through the lubricating oil filter device 7 to remove impurities and particles, ensuring oil cleanliness. The filtered lubricating oil enters the automatic regulating hydraulic control oil circuit 2, which is used to regulate the hydraulic pressure to meet the adjustment needs of the induced draft fan blades. Subsequently, the lubricating oil flows through cooler 1 5 and cooler 2 6. These two coolers work together to control the lubricating oil temperature within the normal range through cooling water or air cooling. Temperature sensor 11 monitors the oil tank temperature in real time and feeds the signal back to the local control box 10 for automatic adjustment of the cooler's operating status. The cooled lubricating oil enters the lubricating oil control valve group 8, which stabilizes the lubricating oil pressure at the set value through a pressure regulating mechanism. The lubricating oil control valve assembly 8 divides the lubricating oil into two paths: one path delivers lubricating oil to the front and rear bearings of the induced draft fan motor via the front and rear bearing oil passage 3, for lubrication and cooling; the other path delivers lubricating oil to the main bearing of the induced draft fan via the bearing oil passage 4, also for lubrication and cooling. During the entire oil supply process, if the outlet oil pressure of the induced draft fan oil pump 1 exceeds the preset set value, the system safety valve assembly 9 automatically opens to release pressure, returning excess lubricating oil to the oil tank, thereby preventing system overpressure and ensuring oil circuit safety. During operation, the flow rate and pressure of the lubricating oil can be precisely adjusted via the lubricating oil control valve assembly 8, avoiding the drawbacks of relying on experience to determine the amount of grease added in the past, and achieving stable control of bearing temperature.

[0021] Through the above structural design, this lubricating oil supply station demonstrates significant technical advantages. Firstly, by employing a combined oil station supply method, it uses only one station and one type of oil to simultaneously meet the lubrication needs of the induced draft fan motor bearings, the fan bearings, and the adjustment of the induced draft fan blades, achieving a three-in-one function. The station has a compact structure and a small footprint. Secondly, the lubricating oil filter device 7 and the dual cooler design ensure the cleanliness and cooling effect of the lubricating oil, allowing for controllable bearing temperature and preventing abnormal temperature rises due to improper grease addition. Thirdly, the coordination of the system safety valve group 9 and the lubricating oil control valve group 8 ensures the stability and safety of oil pressure, improving the reliability of the induced draft fan operation. Finally, the local control box 10 achieves automated control, simplifying operation and reducing maintenance costs. Therefore, this lubricating oil supply station not only overcomes the shortcomings of existing technologies but also improves the overall system stability and lifespan.

[0022] The above embodiments describe the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Modifications and variations made by those skilled in the art without departing from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A lubricating oil supply station for an induced draft fan, characterized in that, The system includes an oil tank, an induced draft fan oil pump (1), an automatic regulating hydraulic control oil circuit (2), oil circuits for the front and rear bearings of the induced draft fan motor (3), oil circuits for the induced draft fan bearings (4), a No. 1 cooler (5), a No. 2 cooler (6), a lubricating oil filter (7), a lubricating oil control valve group (8), a system safety valve group (9), a local control box (10), and a temperature sensor (11). The inlet of the induced draft fan oil pump (1) is connected to the oil tank, and the outlet is connected in sequence to the lubricating oil filter (7), the automatic regulating hydraulic control oil circuit (2), the No. 1 cooler (5), and the No. 2 cooler (6). Cooler (6); the inlet of the lubricating oil control valve group (8) is connected to the outlet pipe of the No. 2 cooler (6), and its outlet is divided into two paths, which are respectively connected to the front and rear bearing oil circuits (3) of the induced draft fan motor and the bearing oil circuit (4) of the induced draft fan; the system safety valve group (9) is connected in parallel to the outlet pipe of the induced draft fan oil pump (1); the temperature sensor (11) is installed in the oil tank for detecting the oil temperature; the local control box (10) is electrically connected to the induced draft fan oil pump (1), the No. 1 cooler (5), the No. 2 cooler (6) and the temperature sensor (11).

2. The lubricating oil supply station for an induced draft fan according to claim 1, characterized in that, The No. 1 cooler (5) and the No. 2 cooler (6) are connected in series to cool the lubricating oil together.

3. A lubricating oil supply station for an induced draft fan according to claim 2, characterized in that, The No. 1 cooler (5) and the No. 2 cooler (6) are a dual-cooler structure connected in parallel, working together to control the lubricating oil temperature within a preset range.

4. A lubricating oil supply station for an induced draft fan according to claim 1, characterized in that, The inlet end of the system safety valve group (9) is connected to the outlet pipeline of the induced draft fan oil pump (1), and its outlet end is connected to the return oil tank. When the pump outlet oil pressure is higher than the set value, it opens to release pressure.

5. A lubricating oil supply station for an induced draft fan according to claim 1, characterized in that, The lubricating oil control valve group (8) is used to regulate the lubricating oil pressure supplied to the front and rear bearing oil circuits (3) and the bearing oil circuit (4) of the induced draft fan motor.

6. A lubricating oil supply station for an induced draft fan according to claim 1, characterized in that, The automatic adjustment hydraulic control circuit (2) is used to meet the hydraulic requirements for adjusting the induced draft fan blades.

7. A lubricating oil supply station for an induced draft fan according to claim 1, characterized in that, The local control box (10) receives the signal from the temperature sensor (11) and automatically controls the operating status of cooler 1 (5) and cooler 2 (6) based on the signal.

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