JPS63277801A - Electric generator installed in piping - Google Patents

Abstract

PURPOSE:To shorten the length in the axial direction of the titled device which is used in the steel plant, the chemical product plant or the like by inserting rotor blades on the outside surface of the cylinder in which a stator and a rotor are installed. CONSTITUTION:A stator 1 and a rotor 3 of an electric generator are installed in a cylinder 2. The cylinder 2 is housed in the outside pipe 17. The turbine rotor is formed by inserting rotor blades 7 on the outside surface of the cylinder 2. The turbine casing is formed by inserting stator blades 6 on the inside surface of the outside pipe 17. From this measure it becomes possible that the electric generator and the turbine are arranged at the same position in the axial direction and the length of the device in the axial direction is shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a turbine and a generator in a piping built-in power generation device installed inside a piping through which steam or gas flows.

[Conventional technology]

FIG. 2 shows a vertical cross-sectional view of a power generation device with built-in piping that generates electricity using a turbine as a prime mover that operates using steam or gas used in steel or chemical plants.

In the figure, the turbine casing 11 is an inlet pipe 12a.
The generator, which is connected in communication with the turbine rotor 13 and has a built-in turbine rotor 13 therein, is composed of a stator 14 and a rotor 15, and is connected to the low pressure side of the turbine.

That is, the turbine rotor 13 and the generator rotor 15 are directly connected by an integral rotating shaft S. The outer pipe 16 is arranged at a distance from the outer diameter side of the stator frame 17 that houses the stator 14, and one end is connected to the turbine casing 1 and the other end is connected to the turbine casing 1, and the other end is an outflow pipe 18. Side piping 12
b. 19a is a bearing plaque on the inflow side, and 19b is a bearing plug on the outflow side.

Bearings 20a and 20b are held by the bearings 20a and 20b, respectively, and the aforementioned rotating shaft S is supported by these bearings 20g and 20b. Further, 21a is an inflow side guide, and 21b is an outflow side guide.

In such a structure, steam or gas flowing in the direction of arrow P from the inflow side piping 2a performs work inside the turbine, and then a part of the steam or gas flows into the space between the outer piping 16 and the stator frame 17 as shown by the solid arrow. The other part enters the outflow pipe 18 through the inflow side bearing bracket 19 as shown by the dashed arrow.
Flow hole 19 in a. The flow enters the inside of the generator and flows through the gap between the stator 14 and the rotor 15, exits through the flow hole 192 of the bearing plate 19b, enters the outflow pipe 18, and merges with the flow shown by the solid line arrow. After that, the outflow side piping 12
Flows to b in the direction of arrow Q. The turbine is now in operation, and the generator directly connected to the turbine is rotated to generate electricity.

[Problem that the invention seeks to solve]

According to the above-mentioned structure, one end of the rotating shaft on which the generator rotor is attached is extended and the turbine rotor is fitted to the tip of the rotating shaft, which makes the entire generator very long and may cause the turbine rotor to overrun. There was a problem in that the dangerous speed of the rotating shaft could not be set high because it was in a parts state.

It is an object of the present invention to solve the above-mentioned problems and to provide a compact power generation device with built-in piping by reducing the axial dimension of the entire device as much as possible.

[Means for solving problems]

In this invention, for the above-mentioned purpose, the axial dimensions of the turbine and generator are shortened as follows. That is,
A generator is constructed by housing a rotor surrounding the outer periphery of a stator with a gap in a cylindrical body, and supporting this cylindrical body via bearings on fixed shafts fixed to an inflow side cover and an outflow side cover. , rotor blades are implanted on the outer peripheral surface of the cylindrical body of this generator to form a turbine rotor, and stationary blades are implanted on the inner peripheral surface of the outer piping housing the generator to form a turbine casing. The turbine was constructed using

[Effect]

In this invention, the axial dimension of the device is extremely reduced by making the generator a peripheral rotating type, installing rotor blades on the rotating part, and installing stationary blades on the corresponding stationary side to form a turbine. It became very small. And even though the outer diameter is slightly larger, the device as a whole has become more compact.

Embodiment C] FIG. 1 is a longitudinal cross-sectional view of a power generator with built-in piping, which is an embodiment of the present invention, and the same parts as in FIG. 2, which shows a conventional structure, are given the same reference numerals. In this embodiment, the stator 1 of the generator
is fitted onto the fixed shaft S, and the bearings 20a and 20b provided at both ends of the fixed shaft S are respectively bearing plugs y and 19t.
, 192 to pivotally support the cylindrical body 2. This cylindrical body 2 has a turbine rotor U7 embedded in its outer peripheral surface and functions as a turbine rotor.

A rotor 3 of the generator is provided on the inner peripheral surface of the cylindrical body 2 and faces the stator 1 with a gap therebetween. Further, both ends of the fixed shaft S are fixed to the center portions of an inflow side cover 4a and an outflow oil cover 4b provided on both end surfaces of the outer pipe 17, respectively. The outer 1 pipe 17 has turbine stationary blades 6 implanted on its inner circumferential surface and functions as a turbine casing. The inflow side cover 4a is connected to the inflow side pipe 12a via the inflow pipe 5a, and the outflow side cover 4b is connected to the outflow pipe 5.
It is connected to the outflow side pipe 12b via b. 2
1a is an inflow side guide, and 21b is an outflow side guide. Here, a part of the steam or gas flowing from the inflow side 'ff2a in the direction of arrow P flows in the direction shown by the solid arrow. That is, it is guided by the inflow pipe 5a and the inflow side guide 21a, passes through the outer communication hole 41 of the inflow side cover 4a, and enters the inside of the turbine. The steam or gas indicated by this solid line arrow is the stationary blade 6. After passing between the rotor blades 7 and passing through the outer flow hole 42 of the outflow cover 4b, the flow passes through the outflow y5b and the darkness of the outflow side guide 2]b and reaches the outflow arrangement v12b.

Further, another part of the steam or gas flowing in from the inflow side piping 2a in the direction of arrow P flows in the direction shown by the broken line arrow.

That is, it passes through the inside of the inflow guide 21a, passes through the inner communication hole 43 of the inflow side cover 43, and the communication hole 191 of the inflow side bearing plaque l-19a, and enters the inside of the electric machine. The steam or gas indicated by the broken line arrow flows through the gap between the stator 1 and the rotor 3, and flows through the gap between the stator 1 and the rotor 3.
The flow passes through the flow hole 192 of b and the inner flow hole 44 of the inflow side cover 4b, and is guided by the outflow side guide 21b, enters the outflow pipe 5b, and further reaches the outflow 111 piping 12b, forming the flow shown by the solid line arrow. join together. During this process, the turbine becomes operational and the generator is rotated to generate electricity.

〔Effect of the invention〕

In this invention, the turbine is constructed on the outer periphery of the generator inside the piping, so the length in the axial direction of the power generation device of the conventional structure is extremely shortened, making the overall structure compact.Moreover, the turbine rotor is not in an overhanging state but has a fixed shaft structure. Because of this, the critical speed can be set higher, allowing higher speed operation, and it is possible to expect higher outputs with the same physique.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a power generator with built-in pipes which is an embodiment of the present invention, and FIG. 2 is a longitudinal cross-sectional view of a power generator with built-in pipes having a conventional structure.

Claims (1)

[Claims] 1) In a piping built-in power generation device in which a turbine and a generator are installed inside piping that circulates steam or gas,
A rotor that surrounds the outer periphery of a stator fitted to a fixed shaft with a gap is housed in a cylindrical body, and this cylindrical body is supported via bearings on a fixed shaft fixed to an inflow side cover and an outflow side cover. to constitute a generator, rotor blades are implanted on the outer peripheral surface of the cylindrical body of this generator to form a turbine rotor, and stationary blades are implanted on the inner peripheral surface of the outer piping that accommodates the generator. A power generation device with built-in piping, characterized in that a turbine is constructed by forming a turbine casing.