Generator rotor position detection device

Abstract

The utility model relates to the technical field of motors, in particular to a generator rotor position detection device, which comprises a device shell and a rotor, a sensing turntable is arranged between the device shell and the rotor, a detector is arranged between the sensing turntable and the device shell, a plurality of position sensing coils are arranged on one side of the detector, and the position sensing coils are arranged on the other side of the detector. An annular threaded groove is formed in the device shell, a positioning mechanism is arranged in the annular threaded groove, a plurality of positioning grooves are formed in the detector, data transmission equipment is arranged on the outer wall of one side of the device shell, a temperature detector is arranged on one side of the detector, and workers can conveniently clean the detector and the position sensing coil.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and more specifically, to a generator rotor position detection device. Background Art

[0002] A generator refers to a mechanical device that converts mechanical energy into electrical energy. It is driven by a water turbine, steam turbine, diesel engine or other power machinery, and converts the energy generated by water flow, air flow, fuel combustion or nuclear fission into mechanical energy and transmits it to the generator, and then the generator converts it into electrical energy. The general principle of its structure is: using appropriate magnetic-conducting and conductive materials to form a magnetic circuit and an electric circuit that mutually perform electromagnetic induction to generate electromagnetic power and achieve the purpose of energy conversion. When using a generator, a generator rotor position detection device is required to detect the position of the generator rotor, so as to control the commutation of the inverter power transistors.

[0003] As disclosed in a Chinese patent: a motor rotor position detection device, application number: 201621158366.2, comprising: a sensor and a magnetic wheel; the magnetic wheel is arranged on the motor main shaft and is coaxial with the motor main shaft; the magnetic wheel includes a wheel body and a magnetic layer arranged on the wheel body, the magnetic layer has a plurality of magnetic poles, the plurality of magnetic poles are equally spaced along the circumferential direction of the wheel body, and the adjacent magnetic poles have opposite polarities; the sensor is arranged on the motor housing and is used for detecting the change in the magnetic field direction generated by the plurality of magnetic poles when the magnetic wheel rotates, and calculating the angle rotated by the rotor according to the number of changes in the magnetic field direction to determine the rotor position. This motor rotor position detection device has a simple structure, small volume, low price and high detection accuracy; the output signal is a digital signal, and the motor controller does not need to perform complex signal processing, which can simplify the upper-level system; the installation accuracy requirement is lower than that of a resolver and is easy to install.

[0004] However, in the above technical solution, when the generator is running, a rotor position detection device is required to detect the rotor magnetic field position signal to control the commutation of the inverter power transistors. Therefore, the detection data of the rotor position detection device must be accurate enough. At present, the generator rotor position detection device is extremely sensitive to environmental conditions. Once the temperature is too high or too low, it will affect the detection data. As the generator is used for a long time, dust will inevitably accumulate on the rotor position detection device, and these dusts will hinder the heat dissipation of the rotor position detection device, thereby causing the temperature of the rotor position detection device to rise and affecting the detection data. Therefore, it is necessary to regularly remove and clean the rotor position detection device. At present, most of the rotor position detection devices on the market are fixed by a plurality of bolts, and it is extremely troublesome to disassemble and assemble a plurality of bolts during disassembly and assembly, which is not convenient for the staff to clean the rotor position detection device. Summary of the Utility Model

[0005] (I) Technical Problems to be Solved

[0006] The main purpose of the present utility model is to provide a generator rotor position detection device, which can effectively solve the problem that in the background technology, when the generator is running, a rotor position detection device is needed to detect the rotor magnetic field position signal to control the commutation of the inverter power tube. Therefore, the detection data of the rotor position detection device must be accurate enough. However, the current generator rotor position detection devices are extremely sensitive to environmental conditions. Once the temperature is too high or too low, it will affect the detection data. And with the long-term use of the generator, dust will inevitably accumulate on the rotor position detection device, and these dusts will hinder the heat dissipation of the rotor position detection device, thereby increasing the temperature of the rotor position detection device and affecting the detection data. Therefore, it is necessary to regularly remove and clean the rotor position detection device. Most of the rotor position detection devices on the current market are fixed by a plurality of bolts, and when disassembling and assembling, it is necessary to disassemble and assemble a plurality of bolts, which is extremely troublesome and inconvenient for the staff to clean the rotor position detection device.

[0007] (II) Technical solution

[0008] To achieve the above object, the technical solution adopted by the present utility model is as follows:

[0009] A generator rotor position detection device, comprising a device housing and a rotor. A sensing turntable is arranged between the device housing and the rotor. A detector is arranged between the sensing turntable and the device housing. A plurality of position sensing coils are arranged on one side of the detector. An annular thread groove is arranged on the device housing. A positioning mechanism is arranged in the annular thread groove. A plurality of positioning grooves are arranged on the detector. A data transmission device is arranged on the outer wall of one side of the device housing. A temperature detector is arranged on one side of the detector.

[0010] Preferably, the rotor is fixedly connected to the sensing turntable. The position sensing coils are located on the side of the detector close to the sensing turntable. The positioning grooves are trapezoidal.

[0011] Preferably, the positioning mechanism comprises a mechanism base. A plurality of first grooves and a plurality of second grooves are arranged on one side of the mechanism base. A first rotating push plate and a second rotating push plate are respectively arranged in the first grooves and the second grooves.

[0012] Preferably, a first wedge-shaped inclined surface is arranged on the inner wall of the mechanism base. A thread is arranged on the outer wall of the mechanism base. A plurality of sliding inserts are slidably arranged on the device housing. A second wedge-shaped inclined surface is arranged on one side of the sliding insert. Pressure plates are arranged on the outer walls of both sides of the sliding insert. Springs are arranged on the pressure plates.

[0013] Preferably, the inner wall of the mechanism base is in contact with the outer wall of one side of the sliding plug. The first groove and the second groove are arranged in an interlaced manner. The sides of the first rotating push plate and the second rotating push plate close to each other are rotatably connected to the mechanism base.

[0014] Preferably, the first wedge-shaped inclined surface is parallel to the second wedge-shaped inclined surface. One end of the sliding plug is located in the positioning groove. The spring is in a contracted state. One end of the spring is fixedly connected to the mechanism base.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] (1) When the temperature detector detects that the detector and the position sensing coil are continuously in a high-temperature state due to excessive stains, the rotor is turned off, and then the first rotating push plate is rotated so that the first rotating push plate forms a 90-degree angle with the mechanism base. Subsequently, the mechanism base is rotated by pushing the first rotating push plate, and the mechanism base moves away from the rotor through the thread and the annular thread groove, so that the mechanism base gradually leaves the annular thread groove. The mechanism base no longer presses the sliding plug, and the spring rebounds, so that the sliding plug leaves the positioning groove, releasing the fixation of the detector. Subsequently, the detector and the position sensing coil can be disassembled for cleaning. The disassembly and assembly are fast, which is convenient for the staff to clean the detector and the position sensing coil. Description of the Drawings

[0017] Figure 1 It is the overall structural schematic diagram of a generator rotor position detection device of the utility model;

[0018] Figure 2 It is the front view structural schematic diagram of a generator rotor position detection device of the utility model;

[0019] Figure 3 It is the sectional three-dimensional structural schematic diagram of the positioning mechanism in a generator rotor position detection device of the utility model;

[0020] Figure 4 It is the sectional structural schematic diagram of the positioning mechanism in a generator rotor position detection device of the utility model.

[0021] In the figure: 1. Device housing; 2. Rotor; 3. Sensing turntable; 4. Detector; 5. Position sensing coil; 6. Annular thread groove; 7. Positioning mechanism; 701. Mechanism base; 702. First groove; 703. Second groove; 704. First rotating push plate; 705. Second rotating push plate; 706. First wedge-shaped inclined surface; 707. Thread; 708. Sliding plug; 709. Second wedge-shaped inclined surface; 7010. Pressure plate; 7011. Spring; 8. Positioning groove; 9. Data transmission device; 10. Temperature detector. Detailed Embodiments

[0022] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] As Figure 1 and Figure 2 shown, a generator rotor position detection device includes a device housing 1 and a rotor 2. A sensing turntable 3 is arranged between the device housing 1 and the rotor 2. A detector 4 is arranged between the sensing turntable 3 and the device housing 1. A plurality of position sensing coils 5 are arranged on one side of the detector 4. An annular thread groove 6 is arranged on the device housing 1. A positioning mechanism 7 is arranged in the annular thread groove 6. A plurality of positioning grooves 8 are arranged on the detector 4. A data transmission device 9 is arranged on the outer wall of one side of the device housing 1. A temperature detector 10 is arranged on one side of the detector 4.

[0024] As Figure 3 and Figure 4 shown, in another embodiment of the present utility model, the positioning mechanism 7 includes a mechanism base 701. A plurality of first grooves 702 and a plurality of second grooves 703 are arranged on one side of the mechanism base 701. A first rotating push plate 704 and a second rotating push plate 705 are respectively arranged in the first grooves 702 and the second grooves 703;

[0025] The inner wall of the mechanism base 701 is provided with a first wedge-shaped inclined surface 706, the outer wall of the mechanism base 701 is provided with a thread 707, several sliding inserts 708 are slidably arranged on the device housing 1, a second wedge-shaped inclined surface 709 is arranged on one side of the sliding insert 708, pressing plates 7010 are arranged on the outer walls on both sides of the sliding insert 708, and springs 7011 are arranged on the pressing plates 7010. When it is necessary to disassemble the detector 4 and the position sensing coil 5 for cleaning, first rotate the first rotating push plate 704 so that the first rotating push plate 704 forms a right angle with the mechanism base 701, which is convenient for the staff to rotate the mechanism base 701. At this time, the outer wall on one side of the first rotating push plate 704 is closely attached to the inner wall of the first groove 702, and then the mechanism base 701 can be rotated by pushing the first rotating push plate 704. Subsequently, the mechanism base 701 moves away from the rotor 2 through the thread 707 and the annular thread groove 6, so that the mechanism base 701 gradually moves away from the annular thread groove 6. Then the mechanism base 701 no longer presses the sliding insert 708, and the spring 7011 rebounds, causing the pressing plate 7010 to move towards the annular thread groove 6. The pressing plate 7010 drives the sliding insert 708 to move, so that the sliding insert 708 moves out of the positioning groove 8, releasing the fixation of the detector 4. Subsequently, the detector 4 and the position sensing coil 5 can be disassembled for cleaning. After cleaning, the detector 4 and the position sensing coil 5 are placed back in place, and then the mechanism base 701 is placed in the annular thread groove 6, and the second rotating push plate 705 is rotated so that the second rotating push plate 705 forms a right angle with the mechanism base 701. Subsequently, the mechanism base 701 is gradually inserted into the annular thread groove 6 by using the second rotating push plate 705. Then the first wedge-shaped inclined surface 706 gradually presses the second wedge-shaped inclined surface 709, causing the sliding insert 708 to gradually move towards the detector 4. The spring 7011 expands and contracts, and the detector 4 is gradually aligned by using the sliding insert 708 to press the inclined surface of the trapezoidal positioning groove 8. Finally, the sliding insert 708 is completely inserted into the positioning groove 8, thereby fixing the detector 4.

[0026] The working principle of this generator rotor position detection device:

[0027] In use, first, when the rotor 2 rotates, the rotor 2 drives the sensing turntable 3 to rotate. Then, the rotation data is detected by the detector 4 and the position sensing coil 5, and the data is transmitted to a specified device for processing by the data transmission device 9. The temperature detector 10 is used to detect the temperature at the detector 4 and the position sensing coil 5 to prevent high temperature from affecting the data. When the temperature detector 10 detects that the detector 4 and the position sensing coil 5 are continuously in a high temperature state due to excessive stains, the rotor 2 is turned off. Then, the first rotating push plate 704 is rotated so that the first rotating push plate 704 forms a ninety-degree angle with the mechanism base 701. Subsequently, the mechanism base 701 is rotated by pushing the first rotating push plate 704, and the mechanism base 701 moves away from the rotor 2 through the thread 707 and the annular thread groove 6, causing the mechanism base 701 to gradually move away from the annular thread groove 6. The mechanism base 701 no longer presses the sliding insert block 708, and the spring 7011 rebounds, causing the sliding insert block 708 to leave the positioning groove 8, releasing the fixation of the detector 4. Subsequently, the detector 4 and the position sensing coil 5 can be disassembled for cleaning. The disassembly and assembly are quick, facilitating the staff to clean the detector 4 and the position sensing coil 5.

[0028] Obviously, the above embodiments of the present utility model are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, based on the above description, other different forms of changes or variations can be made. It is impossible to list all the implementation manners here. Any obvious changes or variations derived from the technical solutions of the present invention still fall within the protection scope of the present invention.

Claims

1. A generator rotor position detection device, comprising a device housing (1) and a rotor (2), characterized in that: A sensing turntable (3) is arranged between the device housing (1) and the rotor (2), a detector (4) is arranged between the sensing turntable (3) and the device housing (1), a plurality of position sensing coils (5) are arranged on one side of the detector (4), an annular thread groove (6) is arranged on the device housing (1), a positioning mechanism (7) is arranged in the annular thread groove (6), a plurality of positioning grooves (8) are arranged on the detector (4), a data transmission device (9) is arranged on the outer wall of one side of the device housing (1), and a temperature detector (10) is arranged on one side of the detector (4).

2. A generator rotor position detection device according to claim 1, characterized in that: The rotor (2) is fixedly connected to the sensing turntable (3), the position sensing coil (5) is located on a side of the detector (4) close to the sensing turntable (3), and the positioning groove (8) is trapezoidal.

3. A generator rotor position detection device according to claim 2, characterized in that: The positioning mechanism (7) comprises a mechanism base (701), a plurality of first grooves (702) and a plurality of second grooves (703) are arranged on one side of the mechanism base (701), and a first rotating push plate (704) and a second rotating push plate (705) are respectively arranged in the first groove (702) and the second groove (703).

4. A generator rotor position detection device according to claim 3, characterized in that: The inner wall of the mechanism base (701) is provided with a first wedge-shaped inclined surface (706), the outer wall of the mechanism base (701) is provided with a thread (707), a plurality of sliding blocks (708) are slidably provided on the device housing (1), a second wedge-shaped inclined surface (709) is provided on one side of the sliding block (708), and pressure plates (7010) are provided on the outer walls of both sides of the sliding block (708), and a spring (7011) is provided on the pressure plate (7010).

5. A generator rotor position detection device according to claim 4, characterized in that: The inner wall of the mechanism base (701) is in contact with the outer wall of one side of the sliding block (708); the first groove (702) and the second groove (703) are arranged alternately; and the first rotating push plate (704) and the second rotating push plate (705) are rotatably connected to the mechanism base (701) on the side close to each other.

6. A generator rotor position detection device according to claim 5, characterized in that: The first wedge-shaped inclined surface (706) and the second wedge-shaped inclined surface (709) are parallel to each other, one end of the sliding block (708) is located in the positioning groove (8), the spring (7011) is in a contracted state, and one end of the spring (7011) is fixedly connected to the mechanism base (701).

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