Temperature detection device for engine

Abstract

The utility model provides a temperature detection device for an engine, which is applied to the field of temperature detectors, and is characterized in that the temperature detection device comprises a temperature sensor, a detection probe inserted into a bearing bush of the engine and a junction box arranged outside a shell of the engine, and the detection probe is connected with the junction box through a connecting wire body; the connecting wire body penetrates through a shell of the engine; the sealing ring is arranged at the joint of the connecting wire body and the shell of the engine; the engine heating source detection device has the technical effect of realizing direct detection of the engine heating source.

Description

Technical Field

[0001] The utility model relates to the field of temperature detectors, in particular to a temperature detection device for an engine. Background Art

[0002] An engine is a commonly used power source in mechanical devices. The output shaft of the engine usually needs to rotate at a high speed, and a large amount of heat is generated due to friction. Therefore, installing a temperature sensor on the engine to detect the temperature of the engine has become a necessary task to ensure the safe operation of the equipment.

[0003] Since lubricating oil is usually provided inside the engine, the outer shell of the engine generally has good sealing performance. The existing temperature sensors are usually installed on the outer surface of the engine shell. Although this method can play a certain role in detecting the temperature of the engine, the heat generation of the engine is mainly caused by the friction of the rotating shaft, and its heat is mainly concentrated inside the engine. The heat needs to pass through the engine shell during the process of reaching the temperature sensor, and the temperature cannot be directly detected, resulting in the problem of potential safety hazards due to untimely detection of temperature rise. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a temperature detection device for an engine, and its advantage is to realize the direct detection of the heat source of the engine.

[0005] To achieve the above object and other related objects, the utility model provides the following technical solution: A temperature detection device for an engine, comprising:

[0006] A temperature sensor, including a detection probe inserted into the bearing shell of the engine and a junction box arranged outside the shell of the engine. The detection probe is connected to the junction box through a connecting wire body, and the connecting wire body penetrates through the outer shell of the engine; and,

[0007] A sealing ring arranged at the connection between the connecting wire body and the outer shell of the engine.

[0008] Through the above technical solution, when the engine is working, heat is generated due to the friction between the rotating shaft and the bearing shell. Since the detection probe is in direct contact with the bearing shell, the heat can quickly reach the detection probe after the bearing shell is heated, and is transmitted to the rear end through the connecting wire body and the junction box connected to the detection probe, thus solving the problem that the detected temperature is lower than the internal temperature of the engine and the detection result is inaccurate due to heat dissipation and the lag of the engine shell temperature rise during the process of the heat generated by the bearing shell diffusing to the outside of the shell. The sealing ring is used to isolate the internal and external spaces of the engine and prevent the lubricating oil inside the engine from leaking. This solution directly obtains the temperature of the heat source by detecting the temperature of the engine bearing shell, and can accurately know the heat generation situation of the engine in a short time.

[0009] In an embodiment of the present utility model, it further includes an elastic member for applying a squeezing force to the detection probe so that the end thereof fits against the bearing shell of the engine.

[0010] Through the above technical solution, the elastic member applies a squeezing force to the detection probe so that it always abuts against the bearing shell, thereby avoiding poor contact between the detection probe and the bearing shell caused by vibration during the use of the engine, and thus ensuring the accuracy of the detection result.

[0011] In an embodiment of the present utility model, it further includes a connecting sleeve fixed to the bearing shell of the engine. The detection probe is arranged through the connecting sleeve. An abutting ring is fixed on the detection probe. The elastic member is arranged as a spring. The spring is sleeved on the detection probe and its two ends respectively abut against the connecting sleeve and the abutting ring.

[0012] Through the above technical solution, the spring applies a squeezing force to the abutting ring, and further applies a squeezing force to the detection probe so that it always abuts against the bearing shell, thereby avoiding poor contact between the detection probe and the bearing shell caused by vibration during the use of the engine, and thus ensuring the accuracy of the detection result.

[0013] In an embodiment of the present utility model, it further includes fastening bolts for pressing and fixing the sealing ring to the outer shell of the engine. The sealing ring is deformed under pressure and is in close contact with the connecting wire body and the outer shell of the engine respectively.

[0014] Through the above technical solution, while the fastening bolts fix the sealing ring on the outer shell of the engine, they apply a squeezing force to the sealing ring to deform the sealing ring, and the sealing ring squeezes the connecting wire body to improve the sealing performance between the sealing ring and the connecting wire body.

[0015] In an embodiment of the present utility model, the detection probe includes: a housing; a platinum resistor disposed inside the housing, and magnesium oxide powder is filled between the platinum resistor and the housing.

[0016] Through the above technical solution, the resistance value of the platinum resistor linearly increases with temperature. By detecting the resistance value of the platinum resistor, the temperature of the bearing shell can be known. The housing is used to protect the platinum resistor, and the magnesium oxide powder plays a heat conduction role.

[0017] In an embodiment of the present utility model, the material of the housing is set as stainless steel.

[0018] Through the above technical solution, stainless steel is strong enough and can play a good protection effect while being convenient for heat transfer, so that heat can reach the position of the platinum resistor through the housing.

[0019] As described above, the temperature detection device for an engine of the present utility model has the following beneficial effects:

[0020] When the engine is working, heat is generated by friction between the rotating shaft and the bearing bush. Since the detection probe is in direct contact with the bearing bush, the heat can quickly reach the detection probe after the bearing bush heats up, and is transmitted backward through the connecting wire body and the junction box connected to the detection probe, thus solving the problem that the detected temperature is lower than the internal temperature of the engine and the detection result is inaccurate due to heat dissipation and the lag of the engine housing temperature rise during the process of heat generated by the bearing bush diffusing to the outside of the housing. The sealing ring is used to isolate the internal and external spaces of the engine and prevent the lubricating oil in the engine from leaking. This solution can directly obtain the temperature of the heat source by detecting the temperature of the engine bearing bush, and can accurately know the heat generation situation of the engine in a short time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It shows a schematic structural diagram of the temperature detection device for an engine disclosed in an embodiment of the present invention.

[0022] Figure 2 It shows a cross-sectional view of the temperature detection device for an engine disclosed in an embodiment of the present invention.

[0023] Figure 3 Shown as Figure 2 An enlarged schematic view of part A in

[0024] Explanation of the reference numerals of each technical feature in the drawings:

[0025] 1. Detection probe; 2. Junction box; 3. Connecting wire body; 4. Bearing bush; 5. Housing; 6. Sealing ring; 7. Elastic member; 8. Connecting sleeve; 9. Abutting ring; 10. Fastening bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0027] Please refer to Figure 1 , the present invention provides a temperature detection device for an engine, including:

[0028] A temperature sensor, including a detection probe 1 inserted into the bearing bush 4 of the engine and a junction box 2 arranged outside the housing of the engine. The detection probe 1 is connected to the junction box 2 through a connecting wire body 3, and the connecting wire body 3 penetrates through the housing 5 of the engine.

[0029] Please refer to Figure 2, the detection probe 1 includes: a housing and a platinum resistor built into the housing. The material of the housing is set as stainless steel, which has sufficient strength to play a protective role while having good heat conduction effect, enabling the heat generated by the bearing shell 4 to quickly pass through the housing and act on the platinum resistor. The resistance value of the platinum resistor increases linearly with temperature. By detecting the resistance value of the platinum resistor, the temperature of the bearing shell 4 can be known. Magnesium oxide powder is filled between the platinum resistor and the housing, and the magnesium oxide powder plays a role in heat conduction, enabling heat to quickly reach the platinum resistor from the housing.

[0030] Please refer to Figure 2 and Figure 3 , it further includes an elastic member 7 for applying a squeezing force to the detection probe 1 to make its end fit against the bearing shell 4 of the engine; a connecting sleeve 8 is fixed to the bearing shell 4 of the engine by threads. The detection probe 1 penetrates through the connecting sleeve 8. A butting ring 9 is fixed on the housing of the detection probe 1. The elastic member 7 is set as a spring. The spring is sleeved on the detection probe 1 and its two ends are respectively abutted against the connecting sleeve 8 and the butting ring 9. The spring applies a squeezing force to the butting ring 9, and then applies a squeezing force to the detection probe 1 to make it always abut against the bearing shell 4, thereby avoiding poor contact between the detection probe 1 and the bearing shell 4 caused by the vibration of the engine during use, and thus ensuring the accuracy of the detection result.

[0031] Please refer to Figure 1 , it further includes a sealing ring 6 provided at the connection between the connecting wire body 3 and the outer shell 5 of the engine and a fastening bolt 10 for pressing and fixing the sealing ring 6 to the outer shell 5 of the engine. The sealing ring 6 is deformed under the extrusion of the fastening bolt 10 and is in close contact with the connecting wire body 3 and the outer shell 5 of the engine respectively, thereby ensuring the sealing effect.

[0032] When the engine of the present utility model is working, heat is generated by friction between the rotating shaft and the bearing shell 4. Since the detection probe 1 is in direct contact with the bearing shell 4, the heat of the bearing shell 4 can quickly reach the detection probe 1 after the temperature rises, and is transmitted backward through the connecting wire body 3 and the junction box 2 connected to the detection probe 1, thus solving the problem that the detected temperature is lower than the internal temperature of the engine and the detection result is inaccurate due to heat dissipation and the lag of the temperature rise of the engine outer shell 5 during the process of the heat generated by the bearing shell 4 diffusing to the outside of the shell. The sealing ring 6 is used to isolate the internal and external spaces of the engine and prevent the lubricating oil in the engine from leaking. This solution directly obtains the temperature of the heat source by detecting the temperature of the bearing shell 4 of the engine, and can accurately know the heat generation situation of the engine in a short time.

[0033] The above embodiments only illustratively explain the principle and its effects of the present utility model, rather than being used to limit the present utility model. All equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A temperature detection device for an engine, characterized in that: include: A temperature sensor comprises a detection probe (1) inserted into a bearing bush (4) of an engine and a junction box (2) arranged outside a housing of the engine, wherein the detection probe (1) is connected to the junction box (2) via a connecting wire (3), and the connecting wire (3) is arranged to penetrate an outer housing (5) of the engine; and A sealing ring (6) is provided at the connection between the connecting wire body (3) and the outer casing (5) of the engine.

2. The engine temperature detection device according to claim 1, characterized in that: It also includes an elastic member (7) for applying a squeezing force to the detection probe (1) so that the end of the detection probe (1) is in contact with the bearing bush (4) of the engine.

3. The engine temperature detection device according to claim 2, characterized in that: It also comprises a connecting sleeve (8) fixed to the bearing shell (4) of the engine, the detection probe (1) is arranged through the connecting sleeve (8), an abutment ring (9) is fixed to the detection probe (1), and the elastic member (7) is arranged as a spring, the spring sleeve is arranged on the detection probe (1), and the two ends are respectively abutted against the connecting sleeve (8) and the abutment ring (9).

4. The engine temperature detection device according to claim 1, characterized in that: It also includes a fastening bolt (10) for pressing and fixing the sealing ring (6) to the housing (5) of the engine. The sealing ring (6) is squeezed and deformed by the fastening bolt (10) to be in close contact with the connecting wire body (3) and the housing (5) of the engine.

5. The engine temperature detection device according to any one of claims 1 to 4, characterized in that: The detection probe (1) comprises: a shell; and a platinum resistor built into the shell, wherein magnesium oxide powder is filled between the platinum resistor and the shell.

6. The engine temperature detection device according to claim 5, characterized in that: The material of the shell is set to stainless steel.

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