CN204168096U - A New Type 13.8kV60Hz Full Speed Brushless Excitation Steam Generator - Google Patents

Abstract

This utility model discloses a novel 13.8kV 60Hz full-speed brushless excitation generator, which includes a full-speed generator (7), an excitation generator (5), and a coupling (4). The full-speed generator (7) consists of a frame, a rotor (1), end cover A (2), a stator A (3), and an air cooler (6). The stator A (2) is installed inside the frame, and an air outlet is provided below the frame, which is connected to the air cooler (6). The excitation generator (5) consists of a stator B, an armature, a rotating rectifier disk, end cover B, and a housing. The stator B is installed inside the housing, and end covers B are installed at both ends of the housing. The main shaft of the armature B is connected to the main shaft of the rotor B through a coupling, and the armature is connected to the rotating rectifier disk. An air inlet duct (8) and an air outlet duct (9) are provided below the excitation generator frame. The beneficial effects of this utility model are: it has the advantages of long service life, high reliability, and reasonable motor structure design.

Description

A New Type 13.8kV60Hz Full Speed Brushless Excitation Steam Generator

technical field

The utility model relates to a full-speed brushless excitation steam generator, in particular to a novel 13.8kV60Hz full-speed brushless excitation steam generator.

Background technique

The voltage 13.8kV class, 60Hz turbo generator is mainly aimed at countries where the power grid frequency is 60Hz. There are few domestic manufacturers of small and medium capacity 60Hz and 13.8kV turbo generators in my country. The main reason is that the technology is immature and the production equipment cannot meet the processing needs. For a generator with a voltage level of 13.8kV, the insulation requirements for each part of the generator are higher; at the same time, for its full-speed motor, on the premise of satisfying the electromagnetic performance, it also needs to meet the mechanical requirements, and mechanical analysis of each component is required. The speed of the full-speed two-pole steam generator is as high as 3600r/min, which requires high requirements on the material of the rotating parts and the precision of the processing equipment.

Utility model content

The purpose of the utility model is to overcome the shortcomings of the prior art and provide a new 13.8kV60Hz full-speed brushless excitation steam generator with long service life, high reliability and reasonable motor structure design.

The purpose of this utility model is achieved through the following technical solutions: a new 13.8kV60Hz full-speed brushless excitation steam generator, which includes a full-speed generator, an excitation generator and a coupling, and the full-speed generator is composed of a machine Base, rotor, end cover A, stator A, air cooler, the stator A is installed in the machine base, the two ends of the machine base are provided with end covers A, the rotor is installed in the stator A, the An air outlet is provided under the machine base, and the air outlet is connected to the air cooler. The excitation generator includes a stator B, an armature, a rotating rectifier disc, an end cover B and a casing. The stator B is installed on the machine In the casing, end caps B are installed at both ends of the casing, and the armature is installed in the stator B. The main shaft of the armature B is connected with the main shaft of the rotor B through a coupling, and the armature is connected with the rotating rectifier disc. An air inlet duct and an air outlet duct are arranged below the exciter base.

The iron core of the stator A is made of silicon steel sectors laminated after insulation, and fixed to the machine base with positioning ribs, and the stator core is divided into multiple sections in the axial direction by section steel, with non-magnetic The steel pressure finger and the pressure ring are clamped, and the teeth and yoke of the air outlet section of the stator core are equipped with resistance temperature measuring elements; the stator A coil adopts a basket-shaped half coil, and the coil is made of double glass fiber-wrapped flat copper wire. The end is made of triangular brackets and interlayer pads bound with polyester glass rope to form a solid whole, and a Pt100 type resistance temperature measuring element is installed between the upper and lower layer wire rods in the designated slot.

The rotor is composed of a rotating shaft, a rotor coil, a retaining ring, a fan and a conductive rod. The two ends of the rotating shaft are respectively provided with journals, and the main part between the two journals is the rotor core, and the rotor core is provided with There are two symmetrical large teeth and two groups of small teeth. Balance screw holes are opened on the two large teeth. Single-stage paddle fans are installed at both ends of the rotor body. The fans include fan blades and fan seat rings. The seat ring is fixed on the rotating shaft of the rotor of the main generator by shrink fitting, and the fan blades are fixed on the fan seat ring with nuts.

One end of the armature is covered with a propeller fan.

The rotating rectifying disk includes a rectifying ring, a rotating diode, a breaker and a connecting copper bar, and the rotating diode, a breaking device and a connecting copper bar are all arranged on the rectifying ring to form a rectifying circuit, and the rectifying circuit is a three-phase Bridge full wave rectifier circuit.

The utility model has the following advantages: the full-speed brushless excitation steam generator of the utility model is provided with fans on both the rotor and the armature, and the air inlet and outlet ducts are arranged under the excitation generator, which increases the speed of the steam generator. Excellent cooling effect, prolonging the service life;, using materials suitable for the high speed requirements of the motor, reasonable structural design, convenient installation and maintenance, and can provide technical support for the brushless excitation turbogenerator market.

Description of drawings

Fig. 1 is the structural representation of the utility model

In the figure, 1-rotor, 2-end cover, 3-stator A, 4-coupling, 5-excitation generator, 6-air cooler, 7-full speed generator, 8-inlet air duct, 9-outlet air duct.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described, and the protection scope of the utility model is not limited to the following:

As shown in Figure 1, a novel 13.8kV60Hz full-speed brushless excitation steam generator includes a full-speed generator 7, an excitation generator 5 and a shaft coupling 4, and the full-speed generator 7 consists of a base, The rotor 1, the end cover A2, the stator A3, and the air cooler 6 are composed. The stator A2 is installed in the base, and the ends of the base are provided with end covers A2, and the rotor 1 is installed in the stator A3. An air outlet is arranged below the base, and the air outlet is connected to the air cooler 6. The excitation generator 5 includes a stator B, an armature, a rotating rectifier disc, an end cover B and a casing. The stator B Installed in the casing, in this embodiment, the stator B is installed on the stator base, the stator base is welded by steel plate and cast steel casing, in order to facilitate hoisting, the stator base is equipped with a lifting handle, and the stator magnetic pole The iron core is made of laminated 1mm steel plates, and is axially locked as a whole with magnetic pole rivets, and fixed on the casing with bolts in the radial direction. End covers B are installed at both ends of the casing, and the armature is installed on the stator B. Inside, the main shaft of the armature B is connected to the main shaft of the rotor B through a coupling, and the armature is connected to the rotating rectifying disc. An air inlet channel 8 and an air outlet channel 9 are arranged under the exciter frame.

In this embodiment, the iron core of the stator A3 is made of silicon steel sectors laminated after insulation, and fixed to the machine base with positioning ribs, and the stator core is divided into multiple sections in the axial direction by section steel. The ends are clamped by non-magnetic steel pressure fingers and pressure rings, and the teeth and yoke of the air outlet section of the stator core are equipped with resistance temperature measuring elements; the stator A (3) coil adopts a basket-shaped half coil, and the coil is composed of double The flat copper wire covered with glass fiber is stacked, and the end of the coil is bound by a triangular bracket and an interlayer spacer with a polyester glass rope to form a solid whole. And a Pt100 type resistance temperature measuring element is installed between the upper and lower wire rods in the designated slot, which can monitor the temperature of the three-phase winding at any time and improve the reliability of the full-speed generator.

In this embodiment, the rotor 1 is composed of a rotating shaft, a rotor coil, a guard ring, a fan, and a conductive rod. The two ends of the rotating shaft are respectively provided with journals, and the main part between the two journals is the rotor core. Two symmetrical large teeth and two groups of small teeth are arranged on the core, and balance screw holes are respectively opened on the two large teeth. Fans are respectively installed at both ends of the rotor 1 body, and the fans include fan blades and fan seat rings. The fan seat ring is fixed on the rotating shaft of the main generator rotor by shrink fit, and the fan blades are fixed on the fan seat ring with nuts. Further, the groove wedge of the rotor 1 is made of hard aluminum alloy, and the two ends are made of forged copper groove wedge. For high speed requirements, the retaining ring is made of high-strength non-magnetic alloy steel forgings, and appropriate ventilation holes are drilled at the corresponding coil gaps to strengthen the cooling of the rotor 1 coil end. The fan on the rotor 1 body is Centrifugal fan with backward inclined blades is welded with high-quality steel to provide circulating power for the cooling of the generator.

In this embodiment, one end of the armature is covered with a propeller fan, and the rotating rectifying disc includes a rectifying ring, a rotating diode, a breaker and a connecting copper bar, and the rotating diode, a breaking device and a connecting copper bar are all arranged on the rectifying ring , to form a rectifier circuit, the rectifier circuit is a three-phase bridge full-wave rectifier circuit.

Claims (5)

1. a novel 13.8kV60Hz full rotating speed brushless excitation vapour sends out machine, it is characterized in that: it comprises full tacho generator (7), excitation generator (5) and shaft coupling (4), described full tacho generator (7) is by support, rotor (1), end cap A(2), stator A(3), air cooler (6) forms, described stator A(2) be arranged in support, described support two ends are provided with end cap A(2), described rotor (1) is arranged on stator A(3) in, an air outlet is provided with below described support, air outlet is connected with air cooler (6), described excitation generator (5) comprises stator B, armature, rotating rectifier dish, end cap B and casing composition, described stator B is arranged in casing, the two ends of casing are provided with end cap B, armature is arranged in stator B, the main shaft of described armature B is connected by shaft coupling with the main shaft of rotor B, armature is connected with rotating rectifier dish, an air inlet duct (8) and exhaust passage (9) are provided with below described seat for exciting dynamo.

2. the novel 13.8kV60Hz of one according to claim 1 full rotating speed brushless excitation vapour sends out machine, it is characterized in that: described stator A(3) iron core by silicon steel fanning strip through insulation after be overrided to form, and adopt positioning bar to be fixed on support, adopt shaped steel that stator core is divided into multistage vertically, adopt non-magnetic steel end finger and trim ring clamping between every two ends, teeth portion and the yoke portion of stator core wind outlet section are all provided with resistance temperature measurement element; Stator A(3) coil employing basket-type half coil, coil is built up by dual-fiberglass wrapped flat copper wire, end winding is formed with washing the colligation of glass rope by triangular supports and interlayer filler strip, forms a firm entirety, and between upper and lower layer line rod in specified slot, Pt100 type resistance temperature measurement element is housed.

3. the novel 13.8kV60Hz of one according to claim 1 full rotating speed brushless excitation vapour sends out machine, it is characterized in that: described rotor (1) is by rotating shaft, rotor coil, retaining ring, fan and conducting rod composition, described rotating shaft two ends are respectively equipped with axle journal, main part between two axle journals is rotor core, rotor core is provided with two symmetrical canine tooths and two groups of little teeth, two canine tooths have mass screw hole, single-stage paddle fan is equipped with at rotor (1) body two ends respectively, described fan comprises fan leaf and fan seat ring, fan seat ring hot jacket is fixed in the rotating shaft of main generator rotor, fan leaf nut is fixed on conjunction on fan seat ring.

4. the novel 13.8kV60Hz of one according to claim 1 full rotating speed brushless excitation vapour sends out machine, it is characterized in that: described armature one end cover has rotary propeller type fan.

5. the novel 13.8kV60Hz of one according to claim 1 full rotating speed brushless excitation vapour sends out machine, it is characterized in that: described rotating rectifier dish comprises collector ring, rotating diode, fuse and connection copper bar, rotating diode, fuse and connection copper bar are arranged on collector ring, composition rectification circuit, described rectification circuit is three-phase bridge full-wave rectifying circuit.