Main bearing temperature monitoring device

Abstract

The utility model discloses a main bearing temperature monitoring device, which belongs to the technical field of engines and comprises a main bearing temperature sensor, a signal acquisition device and an engine monitor. The fixing piece of the main bearing temperature sensor comprises a fixing bolt, a straight-through hole is formed in the fixing bolt in the axial direction, a temperature probe is installed at the top end of the main bearing temperature sensor, the bottom of the temperature probe is electrically connected with an electrical wiring harness, and the electrical wiring harness penetrates through the straight-through hole of the fixing piece and forms a signal collection wiring harness which is connected to a junction box. The junction box is connected to the engine monitor through the CAN communication wire harness, the engine monitor comprises a temperature display screen and an audible and visual alarm, when the monitored temperature exceeds 90 DEG C, the audible and visual alarm is started, when the monitored temperature exceeds 100 DEG C, the audible and visual alarm is started, a main bearing shutdown signal is sent at the same time, and main bearing damage caused by high temperature can be effectively avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of engines, and particularly relates to a main bearing temperature monitoring device. Background Art

[0002] The "Specification for Ships Powered by Natural Gas Fuel" of the China Classification Society requires that for engines with the lower part of the piston directly communicating with the crankcase, if it cannot be proved that the gas concentration in the crankcase will not exceed the LEL under any circumstances, an oil mist detector or an equivalent device (such as a bearing temperature detector) is required to be installed in the crankcase to monitor the hot spots in the crankcase. Since the oil mist detector has a high price, a bearing temperature detector can also be used to monitor the hot spots in the crankcase.

[0003] The temperature of the traditional main bearing is monitored by installing a thermocouple and using a temperature inspection instrument to cyclically display the main bearing temperature in the form of a liquid crystal screen, a digital tube, etc. It is impossible to effectively and timely give a temperature warning. When the main bearing quickly generates high heat due to reasons such as poor lubrication and metal fatigue, an audible and visual warning cannot be generated in time, resulting in damage to the main bearing. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a main bearing temperature monitoring device. The utility model can monitor the temperature in the crankcase in real time, give an audible and visual alarm in time when the temperature is too high, and reduce the speed of the equipment and stop it, which can effectively solve the problems in the background art.

[0005] The technical solution adopted by the utility model to solve the problems it exists is as follows:

[0006] A main bearing temperature monitoring device, characterized in that it includes a main bearing temperature sensor 1, a signal acquisition device 2 and an engine monitor 3;

[0007] The main bearing temperature sensor 1 is installed in a sensor installation hole opened inside the engine main bearing cover 4, and is fixedly connected by screwing the external thread of the fixing bolt 13 of the main bearing temperature sensor 1 with the internal thread of the sensor installation hole;

[0008] The surface of the external thread of the fixing bolt 13 is coated with thread locking glue;

[0009] The fixing member of the main bearing temperature sensor 1 includes a fixing bolt 13, and a straight through hole is axially arranged inside the fixing bolt 13. A temperature probe 11 is installed at the top of the main bearing temperature sensor 1, the bottom of the temperature probe 11 is electrically connected to an electrical wire harness 14, the electrical wire harness 14 passes through the straight through hole of the fixing member, and the electrical wire harness 14 forms a signal acquisition wire harness 21 and is connected to a junction box 22, and the junction box 22 is connected to the engine monitor 3 through a CAN communication wire harness.

[0010] The engine monitor 3 includes a temperature display screen 31 and an acoustic-optic alarm 32.

[0011] Preferably, the sensor mounting hole of the main bearing cap 4 is a through hole located in the middle position of the main bearing cap, and a thread is provided inside the mounting hole.

[0012] Preferably, the signal acquisition device 2 includes a signal acquisition wire harness 21 and a junction box 22.

[0013] Preferably, a CAN communication conversion module is provided inside the junction box 22. The electrical wire harness 13 of the main bearing temperature sensor 1 is connected to the input end of the CAN communication module inside the junction box 22, and the output end of the CAN communication module is connected to the engine monitor.

[0014] Preferably, a controller is provided inside the engine monitor, and the controller is electrically connected to the temperature display screen 31 and the acoustic-optic alarm 32.

[0015] Preferably, the specific number of the main bearing temperature sensors 1 corresponds to the number of main journal necks of the engine main bearings 5.

[0016] Preferably, the specific structure of the main shaft temperature sensor 1 is that the top is a temperature probe 11, a protection tube is provided outside the temperature probe, the bottom of the temperature probe is also connected to the upper end of a spring 12, the lower end of the spring 12 is connected to a fixing bolt 13, and a threaded connection buckle mechanism is provided inside the fixing bolt to fix the electrical wire harness 14.

[0017] Preferably, the electrical wire harness 14 is made of a polytetrafluoroethylene high-temperature silver-plated material.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] The present utility model provides a main bearing temperature detection device, which can, according to the feedback of sensors, monitor the temperature of the main bearings of an engine, especially the main bearings of a natural gas-powered ship engine, effectively trigger an alarm, timely detect potential faults, and effectively warn of major mechanical accidents such as poor lubrication, metal fatigue, and mechanical wear that are prone to generate high temperatures, thereby ensuring the safe and reliable operation of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0021] Figure 1 It is a schematic structural diagram of a main bearing temperature monitoring device of the present utility model.

[0022] Figure 2 It is a schematic installation diagram of the main bearing temperature sensor in the main bearing cap in a main bearing temperature monitoring device of the present utility model.

[0023] Figure 3 This is a schematic sectional view of the installation of the main bearing temperature sensor in the main bearing temperature monitoring device of the present utility model in the main bearing cover.

[0024] Figure 4 This is the specific structure of the main bearing temperature sensor in the main bearing temperature monitoring device of the present utility model.

[0025] In the figure: 1 is the main bearing temperature sensor, 11 is the temperature probe, 12 is the spring, 13 is the fixing bolt, 14 is the electrical harness, 21 is the signal acquisition harness, 22 is the junction box, 3 is the engine monitor, 31 is the temperature display screen, 32 is the audible and visual alarm, 4 is the main bearing cover, and 5 is the main bearing. Specific embodiments

[0026] As used in the specification and claims, certain terms are used to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in names as a way to distinguish components, but rather use the difference in functions of components as the criterion for distinction. As used throughout the specification and claims, the term "comprising" is an open-ended term and should be interpreted as "including but not limited to". "Substantially" means within an acceptable error range, and those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0027] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Referring to the attached drawings Figures 1 to 3 The present utility model will be further described in detail.

[0030] As Figure 1As shown in the figure, a main bearing temperature detection device includes a main bearing temperature sensor 1, a signal acquisition device 2, and an engine detector 3. The main bearing temperature sensor 1 includes a temperature probe 11, a fixing bolt 12, and an electrical harness 13.

[0031] As Figure 2 , 3 shown in the figure, the main bearing temperature sensor 1 is installed in the mounting hole at the middle position of the main bearing cap 4. The mounting hole is a through hole and is internally provided with threads. Threads are also provided on the outer side of the fixing bolt 12 in the main bearing temperature sensor 1, which can be connected to the internal threads of the mounting hole. Before screwing, apply thread locking adhesive on the outer side of the fixing bolt and then screw it for installation to fix the main bearing temperature sensor 1 into the main bearing cap 4.

[0032] As Figure 4 shown in the figure, the specific structure of the main bearing temperature sensor 1 includes a temperature probe 11, a spring 12, a fixing bolt 13, and an electrical harness 14. A protective tube is installed at the top of the temperature probe 11 to protect the temperature probe and prevent damage to the temperature probe 11 caused by problems such as high-temperature collision. The bottom of the temperature probe 11 is connected to the electrical harness 14. The electrical harness 14 passes through the hollow area of the spring 12 and the central through hole of the fixing bolt 13, and is fixed to the bottom of the main bearing temperature sensor 1 through a bottom snap structure.

[0033] The electrical harness 14 described above uses a polytetrafluoroethylene high-temperature silver-plated material and has the ability to resist high temperature and interference.

[0034] The number of specific main bearing temperature sensors corresponds one-to-one with the main journal of the main bearing 3. Multiple electrical harnesses 14 are combined into a signal acquisition harness 21, and the signal acquisition harness 21 is connected to a junction box 22. A CAN communication conversion module is provided inside the junction box 22, which can convert the electrical signals transmitted by the signal acquisition harness 21 into information conforming to the CAN communication protocol and transmit it to the engine monitor 3 through CAN communication.

[0035] The engine monitor 3 includes a temperature display screen 31 and an audible and visual alarm 32. The temperature display screen 31 real-time displays the temperature conditions at each main journal measured by each main bearing temperature sensor 1, and compares the current temperature conditions with the threshold temperature. When the temperature exceeds the threshold temperature, that is, when the temperature exceeds 90 degrees Celsius, the audible and visual alarm 32 is triggered for timely audible and visual alarm, facilitating relevant staff to make corresponding responses in a timely manner and take corresponding solutions. When the temperature exceeds the limit threshold temperature, that is, when the temperature exceeds 100 degrees Celsius, while triggering the audible and visual alarm 32, the internal controller of the engine detector 3 will send a speed reduction and shutdown signal to the main bearing 5 controller. This prevents major mechanical failures and thus causes relatively large losses.

[0036] The specific operation method of this device is as follows: Apply thread locking adhesive to the main bearing temperature sensor 1 and then screw it into the installation hole in the main bearing cover. After installing the main bearing cap and the main bearing bush, install them into the main journal of the main bearing 5. Connect the electrical harness 14 to the junction box 22, and then connect the power supply of the junction box 22 and the power supply of the engine detector 3. Turn on the main switch of the engine detector. After completing the startup of the device, the temperature display screen 31 starts to display the detected temperature value in real time, and the engine monitor 3 starts to monitor whether the temperature exceeds the threshold temperature.

[0037] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the relevant technical field, various changes can be made without departing from the gist of the present utility model.

Claims

1. A main bearing temperature monitoring device, characterized in that: It includes a main bearing temperature sensor (1), a signal acquisition device, and an engine monitor; The main bearing temperature sensor (1) is installed in a sensor installation hole formed inside the engine main bearing cap (4), and is fixedly connected by screwing the external thread of the fixing bolt (13) of the main bearing temperature sensor (1) with the internal thread of the sensor installation hole; The external thread surface of the fixing bolt (13) is coated with thread locking adhesive; The fixing member of the main bearing temperature sensor (1) includes a fixing bolt (13). A straight through hole is provided along the axial direction inside the fixing bolt (13). A temperature probe (11) is installed at the top of the main bearing temperature sensor (1). The bottom of the temperature probe (11) is electrically connected to an electrical wire harness (14). The electrical wire harness (14) passes through the straight through hole of the fixing member. The electrical wire harness (14) forms a signal acquisition wire harness (21) and is connected to a junction box (22). The junction box (22) is connected to the engine monitor through a CAN communication wire harness; The engine monitor includes a temperature display screen (31) and an audible and visual alarm (32).

2. The main bearing temperature monitoring device according to claim 1, characterized in that, The sensor installation hole of the main bearing cap (4) is a through hole located in the middle of the main bearing cap, and the inside of the installation hole is provided with threads.

3. The main bearing temperature monitoring device according to claim 1, characterized in that ,The signal acquisition device includes a signal acquisition wire harness (21) and a junction box (22).

4. The main bearing temperature monitoring device according to claim 1, characterized in that, A CAN communication conversion module is provided inside the junction box (22). The electrical wire harness (14) of the main bearing temperature sensor (1) is connected to the input end of the CAN communication module inside the junction box (22), and the output end of the CAN communication module is connected to the engine monitor.

5. The main bearing temperature monitoring device according to claim 1, characterized in that A controller is provided inside the engine monitor, and the controller is electrically connected to the temperature display screen (31) and the audible and visual alarm (32).

6. The main bearing temperature monitoring device according to claim 1, characterized in that The specific number of the main bearing temperature sensors (1) corresponds to the number of main journal bearings of the engine main bearing (5).

7. The main bearing temperature monitoring device according to claim 1, characterized in that, The specific structure of the main bearing temperature sensor (1) is that the top is a temperature probe (11). A protective tube is arranged outside the temperature probe. The bottom of the temperature probe is also connected to the upper end of a spring (12). The lower end of the spring (12) is connected to the fixing bolt (13). A threaded connection buckle mechanism is arranged inside the fixing bolt to fix the electrical wire harness (14).

8. The main bearing temperature monitoring device according to claim 1, characterized in that The electrical wire harness (14) is made of polytetrafluoroethylene high-temperature silver-plated material.

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