High-rotating-speed octopole generator

Abstract

The high-rotating-speed octopole generator comprises a generator body, a front end cover and a rear end cover are arranged at the two ends of the generator body respectively, a stator and a rotor are arranged in the generator body, and a wire outlet box is arranged at the top of the generator body; the stator adopts a double-layer winding; the stator coil adopts a glass fiber wrapped enameled wire, and the end part of the stator coil is half-lapped by a layer of glass fiber tape; the rotor has eight poles, a rotor winding is arranged on the rotor, and the rotor winding adopts a glass fiber covered wire; by adopting the stator with the double-layer winding, the generator can output three-phase alternating current with the frequency of 120Hz and the voltage of 600V at the rotating speed of 1800r / min; by adopting the stator coil with the enameled wires wrapped by the glass fibers, and the end part of the stator coil is half-lapped by one layer of the glass fiber tape, the insulation and corrosion resistance of the stator coil can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of industrial generators, in particular to a high-speed eight-pole generator. Background Art

[0002] An octopole generator is a synchronous motor with eight magnetic poles and is typically used in applications requiring high power, high torque, and high efficiency.

[0003] At present, the eight-pole generator used in harsh environments such as rail grinding rail cars requires a speed of 1800r / min, a frequency of 120Hz, and a voltage of 600V. The generator has a high speed and large vibration, and dust can easily enter the generator. Therefore, higher requirements are placed on the reliability of the generator, the insulation and strength of the winding, etc. Usually, the eight-pole generator has a speed of 750r / min, a frequency of 50Hz, a voltage of 400V, an IP23 protection level, and the stator and rotor use enameled wire windings, which cannot meet the requirements of use in this situation.

[0004] For example, the Chinese patent publication number: CN104167842A discloses an eight-pole medium frequency generator, which was applied by our company in the early years, including an exciter rotor, a bearing mounted on the generator shaft to form a rotor, a rotating rectifier module mounted on the exciter rotor, an outlet box mounted on the top of the stator, and an exciter stator mounted on the rear end cover. The rear end cover is connected to the stator by bolts, and the bearing cover is used to position the bearing axially. The bearing is a ball bearing, the stator winding is a formed winding, and the rotor punching is an integral sheet. Platinum thermal resistor temperature sensors are buried in the three-phase stator windings, and moisture-proof heating belts are tied at both ends of the stator windings. The advantages of the present invention are: the generator has a compact structure and high reliability, and is particularly suitable for use in harsh environments such as the field; the patent cannot currently meet the requirements for use in harsh environments such as rail grinding rail cars, so it is improved to propose a high-speed eight-pole generator. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a high-speed eight-pole generator, which aims to solve the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-speed eight-pole generator, comprising a body, a front cover and a rear cover are respectively arranged at both ends of the body, a stator and a rotor are arranged inside the body, and an outlet box is arranged on the top of the body; the stator adopts a double-layer winding; the stator coil adopts glass fiber enameled wire, and the end of the stator coil is half-wrapped with a glass fiber tape; the rotor is eight-pole, and a rotor winding is arranged on the rotor, and the rotor winding adopts glass fiber wrapped wire.

[0007] Furthermore, a balancing ring is provided at both ends of the rotor winding.

[0008] Furthermore, the balance ring is provided with eight groups of holes, two holes in each group, a total of 16 holes, and the 16 holes connect the balance ring to the fixing rods on the eight poles of the rotor, thereby connecting the fixing rods of the rotor into one.

[0009] Furthermore, an exciter is arranged inside the machine body near the rear end cover, and the exciter consists of an exciter stator and an exciter rotor. A permanent magnet machine is arranged outside the rear end cover, and the permanent magnet machine consists of a permanent magnet machine stator and a permanent magnet machine rotor.

[0010] Furthermore, the exciter rotor, the permanent magnet machine rotor and the generator rotor are coaxial.

[0011] Furthermore, a digital voltage regulator is also provided in the outlet box.

[0012] Furthermore, the stator winding of the permanent magnet machine is connected to the stator winding of the exciter through a digital voltage regulator, the rotor winding of the exciter is connected to the rotor winding of the generator through a rotary regulator, and the U and W phases on the stator winding of the generator are connected to the digital voltage regulator.

[0013] Furthermore, an air inlet side plate is provided on one side of the outlet box, and the air inlet side plate is composed of a support plate, filter cotton and a cover plate arranged in sequence from the inside to the outside; waist holes are provided on the support plate and the cover plate.

[0014] Furthermore, the outer end of the front end cover is connected to one end of the connecting ring.

[0015] Compared with the existing technology, the present invention has the following beneficial effects:

[0016] (1) The present invention adopts a double-layer winding stator so that the generator can output three-phase alternating current with a frequency of 120 Hz and a voltage of 600 V at a rotation speed of 1800 r / min; by adopting a stator coil made of glass fiber enameled wire and half-wrapping the end of the stator coil with a layer of glass fiber tape, the insulation and corrosion resistance of the stator coil can be improved; by arranging balancing rings at both ends of the rotor winding, the centrifugal force generated by the eight poles of the rotor can be balanced, thereby improving the stability of the rotor.

[0017] (2) The present invention provides an air inlet side plate on one side of the outlet box, and the air inlet side wall adopts a filter cotton design, which can effectively prevent dust larger than 20 microns from entering the generator, thereby improving the corrosion resistance of the generator winding; through the exciter, permanent magnet machine and digital voltage regulator, the voltage of the generator can be adjusted, thereby improving the dynamic performance of the generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a side structural schematic diagram of the present invention.

[0020] Figure 3 It is a schematic diagram of the structure of the air inlet side plate of the present invention.

[0021] Figure 4 It is a schematic diagram of the balance ring structure of the present invention.

[0022] In the figure, 1. connecting ring; 2. front end cover; 3. stator; 4. rotor; 5. outlet box; 6. exciter; 7. rear end cover; 8. permanent magnet machine; 9. balance ring; 10. air inlet side plate; 11. support plate; 12. filter cotton; 13. cover plate. DETAILED DESCRIPTION

[0023] like Figure 1-Figure 2 As shown, the present invention provides a technical solution: a high-speed eight-pole generator, including a body, a front cover 2 and a rear cover 7 are respectively arranged at both ends of the body, a stator 3 and a rotor 4 are arranged inside the body, and an outlet box 5 is arranged on the top of the body; the stator 3 adopts a double-layer winding, and the stator 3 with a double-layer winding enables the generator to output a three-phase alternating current with a frequency of 120Hz and a voltage of 600V at a speed of 1800r / min; the stator coil adopts glass fiber enameled wire, and the end of the stator coil adopts a glass fiber tape half-lapped layer, which can improve the insulation and corrosion resistance of the stator coil; the rotor 4 is eight-pole, and a rotor winding is arranged on the rotor 4. The rotor winding adopts glass fiber wrapped wire and has good insulation performance. A balance ring 9 is arranged at both ends of the rotor winding. The two balance rings 9 can balance the centrifugal force generated by the imbalance of the eight poles of the rotor 4, thereby improving the stability of the rotor 4.

[0024] Among them, an exciter 6 is arranged inside the body near the rear end cover 7, and the exciter 6 consists of an exciter stator and an exciter rotor. A permanent magnet machine 8 is arranged outside the rear end cover 7, and the permanent magnet machine 8 consists of a permanent magnet machine stator and a permanent magnet machine rotor.

[0025] The exciter rotor, the permanent magnet rotor and the generator rotor 4 are coaxial.

[0026] Among them, a digital voltage regulator is also provided in the outlet box 5. The winding of the permanent magnet machine stator is connected to the winding of the exciter stator through the digital voltage regulator to provide excitation voltage for the exciter stator. The winding of the exciter rotor is connected to the rotor winding of the generator through the rotary regulator to provide excitation voltage for the rotor 4 of the generator. The U and W phases on the stator winding of the generator are connected to the digital voltage regulator to provide detection voltage. Through the exciter 6, the permanent magnet machine 8 and the digital voltage regulator, the voltage of the generator can be adjusted to improve the dynamic performance of the generator.

[0027] The generator is driven by the prime mover. After starting, it relies on the voltage generated by the permanent magnet machine 8, which is rectified by the digital voltage regulator to provide excitation current to the magnetic field of the exciter 8. The armature voltage of the exciter 8 gradually increases, and is sent to the rotor 4 to generate a magnetic field after rectification by the rotating rectifier, so that the generator stator 3 establishes voltage. When the speed approaches the rated value, the digital voltage regulator makes the generator voltage rise rapidly and stabilizes the terminal voltage at the rated value.

[0028] The outer end of the front end cover 2 is connected to one end of the connecting ring 1, and the other end of the connecting ring 1 can be connected to the diesel engine, which can improve the coaxiality of the diesel engine and the generator and reduce vibration.

[0029] like Figure 3 As shown, an air inlet side plate 10 is provided on one side of the outlet box 5, and the air inlet side plate 10 is composed of a support plate 11, filter cotton 12 and a cover plate 13 arranged in sequence from the inside to the outside; waist holes are provided on the support plate 11 and the cover plate 13; the air inlet side plate 10 can effectively prevent dust larger than 20 microns from entering the interior of the generator, thereby improving the corrosion resistance of the internal windings of the generator.

[0030] like Figure 4 As shown, eight groups of holes are provided on the balancing ring 9, two holes in each group, for a total of 16 holes. Through these 16 holes, the balancing ring 9 can be connected to the fixing rods on the eight poles of the rotor 4, and the fixing rods of the rotor 4 can be connected as a whole. In this way, the centrifugal force generated by the ends of the rotor windings of the eight poles is zero, thereby improving the reliability of the rotor windings.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-speed eight-pole generator, comprising a body, characterized in that: A front cover (2) and a rear cover (7) are respectively arranged at both ends of the machine body, a stator (3) and a rotor (4) are arranged inside the machine body, and an outlet box (5) is arranged on the top of the machine body; the stator (3) adopts a double-layer winding; The stator coil is made of glass fiber enameled wire, and the end of the stator coil is half-wrapped with a glass fiber tape; the rotor (4) is eight-pole, and a rotor winding is arranged on the rotor (4), and the rotor winding is made of glass fiber enameled wire.

2. A high speed eight-pole generator according to claim 1, characterized in that: A balancing ring (9) is provided at both ends of the rotor winding.

3. A high speed eight-pole generator according to claim 2, characterized in that: The balancing ring (9) is provided with eight groups of holes, each group having two holes, for a total of 16 holes. The 16 holes connect the balancing ring (9) to the fixing rods on the eight poles of the rotor (4), thereby connecting the fixing rods of the rotor (4) into one body.

4. A high speed eight-pole generator according to claim 3, characterized in that: An exciter (6) is arranged inside the machine body near the rear end cover (7), and the exciter (6) is composed of an exciter stator and an exciter rotor. A permanent magnet machine (8) is arranged outside the rear end cover (7), and the permanent magnet machine (8) is composed of a permanent magnet machine stator and a permanent magnet machine rotor.

5. A high speed eight-pole generator according to claim 4, characterized in that: The exciter rotor, the permanent magnet rotor and the generator rotor (4) are coaxial.

6. A high speed eight-pole generator according to claim 5, characterized in that: A digital voltage regulator is also arranged in the outlet box (5).

7. A high speed eight-pole generator according to claim 6, characterized in that: The stator winding of the permanent magnet machine is connected to the stator winding of the exciter through a digital voltage regulator, the rotor winding of the exciter is connected to the rotor winding of the generator through a rotary regulator, and the U and W phases on the stator winding of the generator are connected to the digital voltage regulator.

8. A high speed eight-pole generator according to claim 7, characterized in that: An air inlet side plate (10) is provided on one side of the outlet box (5), and the air inlet side plate (10) is composed of a support plate (11), filter cotton (12) and a cover plate (13) arranged in sequence from the inside to the outside; waist holes are provided on the support plate (11) and the cover plate (13).

9. A high speed eight-pole generator according to claim 8, characterized in that: The outer end of the front end cover (2) is connected to one end of the connecting ring (1).

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