An early warning device for engine main bearings and connecting rod bearings

Abstract

The present invention discloses a warning device for engine main bearing shells and connecting rod bearing shells, which includes a main bearing shell temperature monitoring system and a connecting rod bearing shell monitoring system. The main bearing shell temperature monitoring system includes a main bearing shell temperature acquisition device, an engine speed sensor, a control unit and a safety alarm system. The main bearing shell temperature acquisition device includes a main bearing cap and a main bearing shell temperature sensor. The main bearing shell temperature sensor is arranged on the main bearing cap. The output ends of the main bearing shell temperature sensor and the engine sensor are respectively electrically connected to the input ends of the control unit and the safety alarm system. The connecting rod bearing shell monitoring system includes a connecting rod bearing shell temperature monitoring device and a connecting rod bearing shell oil fluid monitoring device. This warning device for engine main bearing shells and connecting rod bearing shells can conduct on-line monitoring of the lubricating oil state between the connecting rod bearing shell and the crankshaft connecting rod journal, as well as the temperatures of the main bearing shell and the connecting rod bearing shell, and effectively prevent losses caused by severe wear of the main bearing shell and the connecting rod bearing shell.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and particularly to an early warning device for engine main bearings and connecting rod bearings. Background Art

[0002] With the increasing emphasis on environmental protection and energy conservation, engine exhaust emissions and fuel consumption rates have received more and more attention. To reduce engine exhaust emissions and fuel consumption and meet increasingly stringent laws and regulations, engines are developing in the direction of lightweight, compact and high torque, which directly leads to the unit load borne by the crankshaft connecting rod journal of the engine being several times higher than that of traditional engines. When there are small foreign objects, poor lubrication or dimensional deviation in the friction pairs of the engine, it will cause damage or burning of the main bearings or connecting rod bearings. This will not only affect the normal operation of the engine, but in severe cases, it will cause the failure or scrapping of the crankshaft, connecting rod and even the entire engine.

[0003] Research has found that when the main bearings and connecting rod bearings work abnormally, the temperature of the bearing surface will gradually increase, and the Fe content in the lubricating oil flowing out of the working surface during abnormal wear will increase sharply. If the working temperature of the main bearings and connecting rod bearings and the lubricating oil flowing out of their working surfaces are effectively monitored, the working state of the bearings can be predicted in advance. When an abnormality occurs, an early warning can be given in advance, and timely intervention can be made for possible faults to avoid greater damage.

[0004] Currently, in the industry, an oil analysis device is mainly installed on the engine oil pan to monitor the viscosity, moisture and Fe content of the oil. This monitoring method is relatively one-sided. Most of the components of the engine are cast iron and steel parts, and the oil pan collects the lubricating oil from all lubricating parts. The monitoring indicators can only reflect the viscosity and moisture of the lubricating oil, and cannot determine whether the abnormality is caused by the bearing components through the analysis of metal components. Therefore, the existing structure cannot meet the requirements of monitoring the bearings. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the existing defects and provide an early warning device for engine main bearings and connecting rod bearings, which can on-line monitor the lubricating oil state between the connecting rod bearings and the crankshaft connecting rod journal, and the temperatures of the main bearings and connecting rod bearings, effectively prevent the losses caused by severe wear of the main bearings and connecting rod bearings, and can effectively solve the problems in the background art.

[0006] To achieve the above object, the present invention provides the following technical solutions: An early warning device for engine main bearings and connecting rod bearings, comprising a main bearing temperature monitoring system and a connecting rod bearing monitoring system. The main bearing temperature monitoring system includes a main bearing temperature acquisition device, an engine speed sensor, a control unit and a safety alarm system. The main bearing temperature acquisition device includes a main bearing cap and a main bearing temperature sensor. The main bearing temperature sensor is arranged on the main bearing cap. The output ends of the main bearing temperature sensor and the engine sensor are respectively electrically connected to the input ends of the control unit and the safety alarm system. The connecting rod bearing monitoring system includes a connecting rod bearing temperature monitoring device and a connecting rod bearing oil monitoring device. The connecting rod bearing temperature monitoring device includes an oil collection device and a connecting rod bearing temperature sensor. The oil collection device includes an observation window and an engine oil collection tank. The observation window is installed outside the engine. The engine oil collection tank and the connecting rod bearing temperature sensor are both installed on the observation window. The detection rod of the connecting rod bearing temperature sensor extends into the engine oil collection tank. The connecting rod bearing oil monitoring device includes a constant temperature pretreatment device and a total iron content detection device. An oil property sensor for measuring lubricating oil parameters is installed on the constant temperature pretreatment device. The total iron content detection device is provided with a total iron sensor for detecting the total iron content in the oil.

[0007] As a preferred technical solution of the present invention, the main bearing temperature sensor is threadedly connected to the main bearing cap.

[0008] As a preferred technical solution of the present invention, the installation position of the engine oil collection tank is directly opposite to the connecting rod bearing.

[0009] As a preferred technical solution of the present invention, the connecting rod bearing oil monitoring device further includes an oil pipeline, a system main pump, data processing and control, and an industrial control host. The oil pipeline passes through the observation window and is connected to the inside of the engine oil collection tank. One end of the oil pipeline is connected to the system main pump. The output ends of the oil property sensor and the total iron sensor are respectively electrically connected to the input end of the data processing and control. The output end of the data processing and control is electrically connected to the input end of the industrial control host.

[0010] As a preferred technical solution of the present invention, a flow control valve is arranged on the total iron content detection device.

[0011] As a preferred technical solution of the present invention, a return oil pipeline is arranged between the total iron content detection device and the fuel tank.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: The early warning device for the main bearing shell and connecting rod bearing shell of the engine can realize the implementation monitoring of the working states of the main bearing shell and connecting rod bearing shell of the engine. By analyzing the temperature values of the main bearing shells and connecting rod bearing shells in each gear, the moisture in the oil, the viscosity of the oil, and the content of ferromagnetic particles, the working temperature of the connecting rod bearing shell and the wear condition between the connecting rod bearing shell and the connecting rod journal can be comprehensively judged. By comparing the change rate of the temperature values of the bearing shells in each gear when the operating condition of the engine changes with the set standard temperature value and temperature change rate, the possible abnormal conditions of a certain gear bearing shell can be accurately located, and early warnings can be made in a timely manner, effectively improving the reliability of the engine operation. Brief Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of the main bearing shell temperature monitoring system of the present invention;

[0014] Figure 2 It is a schematic structural diagram of the connecting rod bearing shell monitoring system of the present invention.

[0015] In the figure: 1 main bearing cap, 2 main bearing shell temperature sensor, 3 main bearing shell, 4 observation window, 5 oil collecting box, 6 connecting rod bearing shell temperature sensor, 7 oil pipeline. Detailed Embodiment

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments (for the convenience of description and understanding, the upper part above Figure 1 is described as the upper part). Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0017] Please refer to Figure 1-2, the present invention provides a technical solution: an early warning device for engine main bearings and connecting rod bearings, including a main bearing temperature monitoring system and a connecting rod bearing monitoring system. The main bearing temperature monitoring system includes a main bearing temperature acquisition device, an engine speed sensor, a control unit, and a safety alarm system. The engine speed sensor is installed on the engine rotating shaft. The main bearing temperature acquisition device includes a main bearing cap 1 and a main bearing temperature sensor 2. The main bearing temperature sensor 2 is threadedly connected to the main bearing cap 1, which facilitates the installation and removal of the main bearing temperature sensor 2. The output ends of the main bearing temperature sensor 2 and the engine sensor are respectively electrically connected to the input ends of the control unit and the safety alarm system. The installation position of the oil collection tank 5 is directly opposite to the connecting rod bearing, ensuring that the lubricating oil between the connecting rod bearing and the crankshaft connecting rod diameter can splash into the oil collection tank 5 smoothly. Among them, the engine speed sensor mainly monitors the working speed of the engine. The control unit and the safety alarm system mainly receive and process the data collected by the main bearing temperature sensor and the engine speed sensor, display the relevant data on the working panel, make judgments on the data, and give early warnings according to the situation.

[0018] The connecting rod bearing monitoring system includes a connecting rod bearing temperature monitoring device and a connecting rod bearing oil monitoring device. The connecting rod bearing temperature monitoring device includes an oil collection device and a connecting rod bearing temperature sensor 6. The oil collection device includes an observation window 4 and an oil collection tank 5. The observation window 4 is installed on the outside of the engine. Both the oil collection tank 5 and the connecting rod bearing temperature sensor 6 are installed on the observation window 4. The detection rod of the connecting rod bearing temperature sensor 6 extends into the oil collection tank 5. The connecting rod bearing oil monitoring device includes a constant temperature pretreatment device and a total iron content detection device. An oil property sensor for measuring the parameters of the lubricating oil is installed on the constant temperature pretreatment device, which is used to measure the viscosity, density, dielectric constant, and moisture of the lubricating oil. The total iron content detection device is provided with a total iron sensor for detecting the total iron content in the oil, which is used to judge the total iron content in the oil. The connecting rod bearing oil monitoring device also includes an oil pipeline 7, a system main pump, data processing and control, and an industrial control host. The oil pipeline 7 passes through the observation window 4 and is connected to the inside of the oil collection tank 5. One end of the oil pipeline 7 is connected to the system main pump. The output ends of the oil property sensor and the total iron sensor are both electrically connected to the input end of the data processing and control. The output end of the data processing and control is electrically connected to the input end of the industrial control host. Among them, the data processing and control processes the data collected by the oil property sensor and the total iron sensor. The industrial control host processes and controls the viscosity, density, dielectric constant, moisture, and total iron content of the lubricating oil, and displays the real-time data collected on the screen.

[0019] In order to adjust the flow rate of the oil for easy detection, a flow control valve is provided on the total iron content detection device.

[0020] In order to save energy, a return oil pipeline is provided between the total iron content detection device and the fuel tank to transport the flowing lubricating oil back to the fuel tank.

[0021] When the engine is working, the lubricating oil between the connecting rod bearing and the connecting rod journal is thrown into the oil collection box 5 by the swing of the connecting rod. The connecting rod bearing temperature sensor 6 installed on the observation window 4 is immersed in the oil in the oil collection box 5 to collect the real-time working temperature of the connecting rod bearing, and is transmitted to the control unit and the safety alarm device through the wire harness. Combining with the engine working speed signal collected by the engine speed sensor, the temperature of each gear connecting rod bearing is judged whether it is safe and reliable to work according to the set temperature limit of the connecting rod bearing at different working speeds and the temperature difference limit of each gear connecting rod bearing. If the work is abnormal, an early warning will be given in time. At the same time, the main pump of the system guides the lubricating oil into the constant temperature pretreatment device and the total iron content detection device through the oil delivery pipe 7 immersed in the oil in the oil collection box 5, and measures the parameters such as the viscosity, density, dielectric constant, moisture, ferromagnetic particles, etc. of the lubricating oil. The measured parameters are analyzed by the data processing and control module, and combined with the calibrated parameters, it is judged whether the measured parameters are normal. If the work is abnormal, an early warning will be given in time.

[0022] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An early warning device for engine main bearing shells and connecting rod bearing shells, comprising a main bearing shell temperature monitoring system and a connecting rod bearing shell monitoring system, Characterized in that: The main bearing shell temperature monitoring system includes a main bearing shell temperature acquisition device, an engine speed sensor, a control unit and a safety alarm system. The main bearing shell temperature acquisition device includes a main bearing cap (1) and a main bearing shell temperature sensor (2). The main bearing shell temperature sensor (2) is threadedly connected to the main bearing cap (1). The main bearing shell temperature sensor (2) is arranged on the main bearing cap (1). The output ends of the main bearing shell temperature sensor (2) and the engine sensor are respectively electrically connected to the input ends of the control unit and the safety alarm system. The connecting rod bearing shell monitoring system includes a connecting rod bearing shell temperature monitoring device and a connecting rod bearing shell oil fluid monitoring device. The connecting rod bearing shell temperature monitoring device includes an oil fluid collection device and a connecting rod bearing shell temperature sensor (6). The oil fluid collection device includes an observation window (4) and an engine oil collection tank (5). The observation window (4) is installed on the outside of the engine. The engine oil collection tank (5) and the connecting rod bearing shell temperature sensor (6) are both installed on the observation window (4). The installation position of the engine oil collection tank (5) is directly opposite the connecting rod bearing. The detection rod of the connecting rod bearing shell temperature sensor (6) extends into the engine oil collection tank (5). The connecting rod bearing shell oil fluid monitoring device includes a constant temperature pretreatment device and a total iron content detection device. An oil fluid property sensor for measuring lubricating oil parameters is installed on the constant temperature pretreatment device. The total iron content detection device is provided with a total iron sensor for detecting the total iron content in the oil fluid.

2. The early warning device for engine main bearing shells and connecting rod bearing shells according to claim 1, Characterized in that: The connecting rod bearing shell oil fluid monitoring device further includes an oil pipeline (7), a system main pump, data processing and control, and an industrial control host. The oil pipeline (7) passes through the observation window (4) and is internally connected to the engine oil collection tank (5). One end of the oil pipeline (7) is connected to the system main pump. The output ends of the oil fluid property sensor and the total iron sensor are respectively electrically connected to the input end of the data processing and control. The output end of the data processing and control is electrically connected to the input end of the industrial control host.

3. The early warning device for engine main bearing shells and connecting rod bearing shells according to claim 1, Characterized in that: A flow control valve is arranged on the total iron content detection device.

4. The early warning device for engine main bearing shells and connecting rod bearing shells according to claim 1, Characterized in that: A return pipeline is arranged between the total iron content detection device and the fuel tank.

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