A generator and a temperature detection warning device thereof

Abstract

A generator and a temperature detection warning device thereof, the generator comprises a temperature detection warning device, which is installed on the generator and comprises: a temperature detection module comprising a test element and a first resistor, the test element is installed on a temperature rise heating part of the generator and is connected in series with the first resistor to form a voltage division circuit, the voltage division circuit is connected with a positive terminal and a ground terminal of the generator respectively; a warning circuit comprising a first triode, the gate of the first triode is connected with the temperature detection module, the source of the first triode is connected with an indicator terminal of the generator, and the drain of the first triode is grounded; wherein when the resistance value of the test element increases with the temperature rise of the temperature rise heating part and is large enough to drive the voltage division circuit to the voltage division sufficient to drive the first triode, the indicator terminal of the generator is conducted to ground, so that the whole vehicle charging indicator is lighted to alarm.

Description

Technical Field

[0001] This invention relates to automotive alternators, and more particularly to an alternator and its temperature detection and warning device. Background Technology

[0002] Commercial vehicles, especially off-road vehicles, operate under complex and harsh conditions. Alternators typically use ball bearings for transmission. Initial bearing matching calculations often fail to obtain accurate parameters such as vibration and impact acceleration, leading to generator failure before the design life. Bearing failure and disintegration can cause rotor rubbing in the generator, posing safety hazards such as fires. Furthermore, rotor rubbing motors are not worth analyzing due to bearing disintegration, and the motors cannot be repaired, resulting in high failure costs.

[0003] Continuing to use a generator beyond its design lifespan can lead to bearing failure due to the bearings exceeding their design lifespan. Furthermore, it is difficult for customers to perform maintenance and inspections of the generator as required, thus increasing the probability of generator failure.

[0004] Existing technologies include embedding color-changing rubber in the generator's external casing to identify the generator's operating environment temperature. However, this method cannot autonomously identify and warn of abnormal bearing conditions; it can only detect abnormal bearing usage during maintenance inspections, requiring replacement. Furthermore, it cannot accurately identify abnormal operating temperatures, hindering subsequent improvements. Another approach uses decoupled one-way pulleys. In cases of rotor rubbing, the excessive torque required for dragging can be mitigated by the decoupled one-way pulley slipping to prevent fires and other safety hazards. However, decoupled one-way pulleys still require bearings, and with limited pulley diameter, introducing them increases the likelihood of generator failure. Bearing matching verification based on experience and some market application information reveals issues where actual applications exceed matching boundaries. Current risk management relies on manual inspections, which carries the risk of missed or falsely detected bearing malfunctions, and the lack of automatic warnings makes the risks uncontrollable. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a generator and its temperature detection and warning device, which addresses the above-mentioned problems in the prior art.

[0006] To achieve the above objectives, the present invention provides a temperature detection and warning device, installed on a generator, comprising:

[0007] The temperature detection module includes a test element and a first resistor. The test element is installed on the heat-generating part of the generator and is connected in series with the first resistor to form a voltage divider circuit. The voltage divider circuit is connected to the positive terminal and the ground terminal of the generator respectively.

[0008] The warning circuit includes a first transistor, the gate of which is connected to the temperature detection module, the source of which is connected to the indicator light terminal of the generator, and the drain of which is grounded.

[0009] When the resistance of the test element increases with the temperature of the heating element until the voltage of the voltage divider circuit is sufficient to drive the first transistor, the indicator light terminal of the generator is grounded, causing the vehicle charging indicator light to illuminate as an alarm.

[0010] The aforementioned temperature detection and warning device further includes a delayed warning module, comprising a delayed power supply, an LED light, and a delayed circuit connected in series. The delayed circuit includes a second transistor, a third transistor, and a capacitor. The gate of the second transistor is connected to the voltage divider circuit, the source of the second transistor is connected to the positive terminal of the generator, and the drain of the second transistor is connected to the capacitor. The gate of the third transistor is connected to the capacitor, the source of the third transistor is connected to the LED light, and the drain of the third transistor is connected to the temperature detection module.

[0011] The temperature detection and warning device described above further includes a temperature conversion and storage module connected to the temperature detection module, used to read the electrical signal of the temperature detection module, perform digital conversion, and store it.

[0012] In the aforementioned temperature detection and warning device, the testing element is a resistance temperature detector (RTD) or a thermocouple.

[0013] In the aforementioned temperature detection and warning device, the testing element is a resistance temperature detector (RTD), the temperature rise and heating part of the generator includes a front bearing, stator, or rectifier bridge, one end of the RTD is mounted on the front bearing, stator, or rectifier bridge of the generator, the temperature detection module is installed inside the regulator, and the other end of the RTD is connected to the temperature detection module.

[0014] In the aforementioned temperature detection and warning device, the heat-generating part of the generator is the front bearing, and one end of the thermal resistor is fixed to the outer ring of the front bearing by means of a connection structure, welding, gluing, or riveting.

[0015] The temperature detection and warning device described above includes a connecting structure comprising a housing, a compression spring, and a compression spring sheet. The compression spring sheet is connected to the thermal resistor. The compression spring is placed inside the housing and abuts against the compression spring sheet. The housing is threaded on the outside. The front end cover of the generator has a screw hole that matches the thread of the housing. The compression spring sheet fits against the outer ring of the front bearing of the generator.

[0016] In the aforementioned temperature detection and warning device, the thermal resistor is a Cu50 or Pt100 metal thermal resistor.

[0017] In the aforementioned temperature detection and warning device, when the temperature detected by the thermal resistor is greater than the set temperature, the first transistor is turned on.

[0018] To better achieve the above objectives, the present invention also provides a generator, which includes the temperature detection and warning device described above.

[0019] The technical effects of this invention are as follows:

[0020] This invention involves pre-embedding test leads in the heat-generating parts of an AC generator and connecting them to a temperature monitoring and warning device. The temperature of the components in the heat-generating parts is read through the test leads, and when the temperature exceeds a set value, the alarm function of the AC generator is triggered. The invention has a simple structure, is easy to modify, is reliable in application, and is low in cost.

[0021] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a generator structure according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of a temperature detection and warning device according to an embodiment of the present invention;

[0024] Figure 3 This is a circuit diagram of a temperature detection and warning device according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the connection structure according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the assembly of a temperature detection and warning device according to an embodiment of the present invention;

[0027] Figure 6A This is a schematic diagram of a regulator structure according to an embodiment of the present invention;

[0028] Figure 6B for Figure 6A Rear view;

[0029] Figure 7 This is a schematic diagram of a temperature detection and warning device according to another embodiment of the present invention.

[0030] Among them, the attached reference numerals

[0031] 1. Front cover

[0032] 2. Rear end cover

[0033] 3 stators

[0034] 4 rotors

[0035] 5 regulators

[0036] 6 Temperature detection and warning device

[0037] 61 Temperature Detection Module

[0038] 611 First Resistor

[0039] 612 test element

[0040] 62 Alarm Circuit

[0041] 621 first transistor

[0042] 622 protection resistor

[0043] 63 Delayed Alert Module

[0044] 631 Delay Power Supply

[0045] 632 LED lights

[0046] 633 Delay Circuit

[0047] 6331 second transistor

[0048] 6332 third transistor

[0049] 6333 capacitor

[0050] 64 Temperature Conversion Storage Module

[0051] 65 solder joints

[0052] 66 connection structure

[0053] 661 casing

[0054] 662 clamping spring

[0055] 663 compression spring

[0056] 664 Lock Nut

[0057] 665 cable guide cover

[0058] 7 rectifier bridge

[0059] 8 pulleys

[0060] 9 shields

[0061] 10 front bearing

[0062] 11-spindle

[0063] 12 temperature rise heating element

[0064] The positive terminal of the B+ generator

[0065] E generator grounding terminal

[0066] L generator indicator light terminal Detailed Implementation

[0067] The structural and working principles of the present invention will be described in detail below with reference to the accompanying drawings:

[0068] See Figure 1 , Figure 1 This is a schematic diagram of a generator structure according to an embodiment of the present invention. The generator of the present invention includes a front cover 1, a rear cover 2, a stator 3, a rotor 4, a regulator 5, a rectifier bridge 7, a pulley 8, and a protective cover 9. The stator 3 is mounted and supported on the front cover 1 and the rear cover 2. The rotor 4 is mounted and supported on the stator 3 via a rotating shaft 11 within the accommodating space enclosed by the front cover 1 and the rear cover 2. The pulley 8 is connected to one end of the rotating shaft 11, and the regulator 5 and the rectifier bridge 7 are located at the other end of the rotating shaft 11. The protective cover 9 is installed outside the regulator 5 and the rectifier bridge 7. The composition, structure, relative positions, connections, and working principles of other components of the generator of the present invention are all mature existing technologies, and therefore will not be described in detail here. This invention includes a temperature detection and warning device 6 within the generator regulator 5, and a pre-installed interface (e.g., solder joint 65) for a test element 612 on the outside of the regulator 5. A connection structure 66 for the test element 612 is also pre-installed on the front cover 1 of the generator. In this embodiment, the test element 612 can be brought into contact with the heat-generating part 12 of the generator (e.g., the outer ring of the front bearing 10) by tightening the housing 661 of the connection structure 66. A compression spring 663 can be used to adjust and ensure reliable contact, and a locking nut 664 can be used to lock and ensure the reliable connection of the connection structure 66. This temperature detection and warning device 6 can also be applied to the rear bearing, stator core, rectifier bridge 7, etc., to protect these components from failure due to overheating.

[0069] See Figure 2 , Figure 3 , Figure 3 This is a circuit diagram of a temperature detection and warning device 6 according to an embodiment of the present invention. Figure 4This is a schematic diagram of the connection structure according to an embodiment of the present invention. The temperature detection and warning device 6 of the present invention is installed on a generator and includes: a temperature detection module 61, used to read the temperature of a test element 612, such as a thermistor, and control the AC generator charging indicator light to remain constantly lit as a warning. The temperature detection module 61 includes a test element 612 and a first resistor 611. The test element 612 is installed in the heat-generating part 12 of the generator and is connected in series with the first resistor 611 to form a voltage divider circuit. The voltage divider circuit is connected to the positive terminal B+ of the generator and the ground terminal E of the generator. The warning circuit 62 includes a first transistor 621. The gate of the first transistor 621 is connected to the temperature detection module 61 and can be located at the thermistor terminal of the voltage divider circuit. The source of the first transistor 621 is connected to the indicator light terminal L of the generator. The drain of the first transistor 621 is grounded, or the drain can be connected to a protective resistor 622 and then grounded. When the resistance of the test element 612 increases with the temperature of the heat-generating part 12 to the point that the voltage of the voltage divider circuit is sufficient to drive the first transistor 621, the indicator light terminal L of the generator is grounded, causing the vehicle charging indicator light to illuminate as an alarm.

[0070] This embodiment also includes a delayed warning module 63, used to facilitate checking the reason for the charging indicator light remaining constantly on, and to easily determine whether the alarm is caused by a fault in the heat-generating part 12 (such as a bearing). The delayed warning module 63 includes a delayed power supply 631, an LED light 632, and a delayed circuit 633 connected in series. The delayed circuit 633 includes a second transistor 6331, a third transistor 6332, and a capacitor 6333. The gate of the second transistor 6331 is connected to the voltage divider circuit, the source of the second transistor 6331 is connected to the positive terminal B+ of the generator, and the drain of the second transistor 6331 is connected to the capacitor 6333. The gate of the third transistor 6332 is connected to the capacitor 6333, the source of the third transistor 6332 is connected to the LED light 632, and the drain of the third transistor 6332 is connected to the temperature detection module 61. The time-delay power supply 631 is preferably a 1.5V button battery. When the voltage divider circuit drives the second transistor 6331, the generator voltage drives the third transistor 6332 to conduct, and the 1.5V time-delay power supply 631 drives the LED light 632 to light up. At the same time, the positive terminal B+ of the generator charges the capacitor 6333. When the vehicle power is cut off, the capacitor 6333 discharges, keeping the third transistor 6332 conducting and ensuring that the LED light 632 is lit. This LED light 632 can be set on the regulator 5 (see...). Figure 6A ).

[0071] The test element 612 can be a resistance temperature detector (RTD) or a thermocouple. In this embodiment, the test element 612 is preferably an RTD. The temperature rise heating part 12 of the generator can be a front bearing 10, a rear bearing, a stator 3, or a rectifier bridge 7, etc. One end of the RTD is installed on the front bearing 10, rear bearing, stator 3, or rectifier bridge 7 of the generator. The temperature detection module 61 is installed in the regulator 5. The other end of the RTD is connected to the temperature detection module 61. In this embodiment, one end of the RTD is tightened to fit against the surface of the front bearing 10 through the connecting structure 66 and secured by the locking nut 664. The RTD passes through the protective grooves reserved on the front cover 1 and the rear cover 2, and its other end is connected to the solder joint 65 on the regulator 5 at the rear of the generator and connected by soldering. The RTD is preferably a Cu50 or Pt100 metal RTD. The selection of the first resistor 611 and the first transistor 621 should ensure that the first transistor 621 conducts when the temperature detected by the RTD is greater than the set temperature. In this embodiment, when the bearing temperature rises to >170℃, the resistance of the thermal resistor increases. When the voltage divider circuit is sufficient to drive the first transistor 621, the L terminal of the generator is connected to ground, causing the vehicle charging indicator light to illuminate as a warning.

[0072] See Figure 4 , Figure 4 This is a schematic diagram of the connection structure 66 according to an embodiment of the present invention. In this embodiment, the heat-generating part 12 of the generator is preferably the front bearing 10. One end of the thermal resistor can be fixed to the outer ring of the front bearing 10 by the connection structure 66, welding, gluing, or riveting. The connection structure 66 in this embodiment includes a housing 661, a clamping spring 662, and a clamping spring 663. The clamping spring 662 is connected to the thermal resistor, and the clamping spring 663 is placed inside the housing 661 and abuts against the clamping spring 662. The housing 661 has threads on its exterior, and the front end cover 1 of the generator has pre-drilled screw holes adapted to the threads of the housing 661. The clamping spring 662 fits against the outer ring of the front bearing 10 of the generator. A locking nut 664 can further ensure reliable fitting. The locking nut 664 is located behind the housing 661, and tightening the locking nut 664 onto the front end cover 1 forms a fixed structure.

[0073] See Figure 5 , Figure 5 This is a schematic diagram of the assembly of a temperature detection and warning device 6 according to an embodiment of the present invention. In this embodiment, the front cover 1 and rear cover 2 of the generator have embedded thermal resistor structures. A wire guide cover 665 can also be provided on the embedded groove. The connecting structure 66 is provided corresponding to the front bearing 10. One end of the thermal resistor is attached and fixed to the outer ring of the front bearing 10 through the connecting structure 66, and the other end of the thermal resistor is fixed to the solder point 65 on the regulator 5 (see...). Figure 6B ).

[0074] See Figure 7 , Figure 7 This is a schematic diagram of a temperature detection and warning device 6 according to another embodiment of the present invention. In this embodiment, the temperature detection and warning device 6 further includes a temperature conversion and storage module 64, connected to the temperature detection module 61, for reading the electrical signal from the temperature detection module 61, performing digital conversion, and storing it. The temperature conversion and storage module 64 can record the application temperature value of the heating element 12, such as the front bearing 10, for obtaining accurate operating conditions during the application matching and verification of the front bearing 10. The temperature conversion and storage module 64 has the function of digitally converting and storing the electrical signal detected by the temperature detection module 61. It can be programmed using a prior art reading and storage device to read the electrical signal from the temperature detection module 61, digitize it, and store it in a preset memory.

[0075] This invention can automatically alert to abnormal phenomena in the generator without requiring manual inspection; and it has no significant impact on the overall reliability of the generator. In-plant durability testing, by pre-embedding test elements 612, the temperature of the heat-generating part 12 (such as the bearing 10) is monitored, and a protection temperature is set on the test bench, achieving automatic shutdown protection when the temperature exceeds 190℃.

[0076] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A temperature detection and warning device, installed on a generator, characterized in that, include: The temperature detection module includes a test element and a first resistor. The test element is pre-embedded in the heat-generating part of the generator to monitor the temperature and is connected in series with the first resistor to form a voltage divider circuit. The voltage divider circuit is connected to the positive terminal and the ground terminal of the generator respectively. An alarm circuit is used to automatically alert the generator to abnormal phenomena. It includes a first transistor, the gate of which is connected to the temperature detection module, the source of which is connected to the indicator light terminal of the generator, and the drain of which is grounded. When the resistance of the test element increases with the temperature of the heating element until the voltage of the voltage divider circuit is sufficient to drive the first transistor, the indicator light terminal of the generator is grounded, causing the vehicle charging indicator light to illuminate and alarm; and a protection temperature is set, and the generator automatically shuts down for protection when the set temperature is exceeded. The test element is a resistance temperature detector (RTD). The temperature rise and heating part of the generator includes a front bearing, stator, or rectifier bridge. One end of the RTD is installed on the front bearing, stator, or rectifier bridge of the generator. The temperature detection module is installed inside the regulator. The other end of the RTD is connected to the temperature detection module. When the temperature detected by the RTD is greater than the set temperature, the first transistor is turned on. The heat-generating part of the generator is the front bearing, and one end of the thermal resistor is attached and fixed to the outer ring of the front bearing by a connection structure, welding, gluing or riveting. The connection structure includes a housing, a compression spring, and a compression spring sheet. The compression spring sheet is connected to the thermal resistor. The compression spring is placed inside the housing and abuts against the compression spring sheet. The housing is threaded on the outside. The front cover of the generator has screw holes that are compatible with the threads of the housing. The compression spring sheet fits against the outer ring of the front bearing of the generator. A lock nut ensures a reliable fit. The lock nut is located behind the housing and is tightened onto the front cover.

2. The temperature detection and warning device as described in claim 1, characterized in that, It also includes a delayed warning module, comprising a delayed power supply, an LED light, and a delayed circuit connected in series. The delayed circuit includes a second transistor, a third transistor, and a capacitor. The gate of the second transistor is connected to the voltage divider circuit, the source of the second transistor is connected to the positive terminal of the generator, and the drain of the second transistor is connected to the capacitor. The gate of the third transistor is connected to the capacitor, the source of the third transistor is connected to the LED light, and the drain of the third transistor is connected to the temperature detection module.

3. The temperature detection and warning device as described in claim 1, characterized in that, It also includes a temperature conversion and storage module, which is connected to the temperature detection module and is used to read the electrical signal of the temperature detection module, perform digital conversion, and store it.

4. The temperature detection and warning device as described in claim 1, characterized in that, The thermal resistor is a Cu50 or Pt100 metal thermal resistor.

5. A generator, characterized in that, Includes the temperature detection and warning device as described in any one of claims 1-4.

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