CN213684253U

CN213684253U - Steam turbine for cogeneration heat supply

Info

Publication number: CN213684253U
Application number: CN202022321697.6U
Authority: CN
Inventors: 张昌顺; 高书强; 姜召星; 张凤雷; 冯业挺; 李�昊
Original assignee: Huaneng Jining High Tech Zone Thermal Power Co ltd; Jining Huayuan Thermal Power Co Ltd
Current assignee: Huaneng Jining High Tech Zone Thermal Power Co ltd; Jining Huayuan Thermal Power Co Ltd
Priority date: 2020-10-16
Filing date: 2020-10-16
Publication date: 2021-07-13
Anticipated expiration: 2030-10-16

Abstract

The utility model relates to a steam turbine for cogeneration supplies heat and uses belongs to steam turbine technical field, including casing, pivot, carousel, blade and steam nozzle, the pivot is rotated with the casing and is connected, and carousel fixed connection is in the pivot, and the even fixed connection of blade is on the lateral wall of carousel, and steam nozzle fixed connection is on the lateral wall of casing, and steam nozzle is towards the blade. The new steam that steam boiler produced directly spouts to the blade through steam nozzle to the drive pivot rotates, converts the heat energy of steam into the function of pivot, thereby the pivot is connected with generating set and is generated electricity, heat supply in the leading-in heat supply network of steam in the casing inner chamber, this structure steam directly spouts to the blade, thereby avoid among the prior art steam to spout from the side of blade into, one-level effect leads to turbine outlet department blade longer and longer, causes the bulky of steam turbine, area is big.

Description

Steam turbine for cogeneration heat supply

Technical Field

The utility model belongs to the technical field of the steam turbine technique and specifically relates to a steam turbine that is used for cogeneration to supply heat usefulness is related to.

Background

The cogeneration turbine is a turbine capable of simultaneously performing two tasks of heat supply and power generation, and a part of steam is extracted from the middle of the turbine and supplied to a user, namely, the turbine supplies heat while generating power. The steam turbine is a rotary steam power device, high-temperature and high-pressure steam passes through a fixed nozzle to become accelerated airflow and then is sprayed onto blades, so that a rotor provided with the blades rotates, and simultaneously, the rotor does work outwards. The blades of the existing steam turbine have unique profile, when high-energy fluid flows over the blades, the profile design can generate pressure difference, the pressure difference enables the blades to generate lift force, and the lift force drives the rotor to rotate, so that the lift force is converted into mechanical energy of the rotor. The fluid has three forms of energy, namely velocity, pressure and temperature, which all fall as the blades absorb energy from the fluid, and these fall are converted into mechanical energy of the rotor, but the low velocity jet does not produce effective lift. In order to increase the speed of rotation, the fluid flows through a set of stators fixed to the turbine casing, the flow area decreases along the stators and therefore the fluid speed increases, where the stators act as nozzles, the kinetic energy increases as the speed of the jet increases in the stators, the fluid in the stator sections does not transfer any static energy, the pressure and temperature of the jet decrease rapidly due to the constant total energy, the steam pressure decreases rapidly and its volume expands rapidly in proportion, in order to accommodate this expanding steam, the flow area must be increased, otherwise the flow rate becomes too high, which results in longer and longer blades at the turbine outlet. This results in a large turbine volume, large floor space and large plant area. We therefore propose a steam turbine structure of reduced volume.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the problem among the above-mentioned prior art, provide a steam turbine that is used for cogeneration to supply heat to use, can realize through following technical scheme:

the utility model provides a steam turbine for cogeneration supplies heat to use, includes casing, pivot, carousel, blade and steam nozzle, the pivot rotates with the casing to be connected, carousel fixed connection is in the pivot, the even fixed connection of blade is on the lateral wall of carousel, steam nozzle fixed connection is on the lateral wall of casing, steam nozzle is towards the blade.

The utility model discloses further set up to: the blade is in a quarter ellipse shape, one side of the plane of the blade is provided with a groove, the blade is arranged in an inclined mode, and the plane of the blade and the tangent plane of the contact point of the rotary table form an included angle of 60 degrees.

The utility model discloses further set up to: the plane of the blade is fixedly connected with a steam guide sheet used for guiding steam into the groove, and the steam guide sheet is radial.

The utility model discloses further set up to: the steam nozzle is provided with six, six steam nozzle intercommunication has the steam house steward, steam nozzle equidistant fixed connection is on the casing lateral wall.

To sum up, the utility model discloses a beneficial technological effect does:

the new steam that steam boiler produced directly spouts to the blade through steam nozzle to the drive pivot rotates, converts the heat energy of steam into the function of pivot, thereby the pivot is connected with generating set and is generated electricity, heat supply in the leading-in heat supply network of steam in the casing inner chamber, this structure steam directly spouts to the blade, thereby avoid among the prior art steam to spout from the side of blade into, one-level effect leads to turbine outlet department blade longer and longer, causes the bulky of steam turbine, area is big.

Drawings

Fig. 1 is an external view schematically showing the overall structure of the present embodiment;

FIG. 2 is a sectional view taken along section line A-A in FIG. 1;

fig. 3 is a schematic diagram for showing the internal structure of the present embodiment.

Reference numerals: 1. a housing; 2. a rotating shaft; 3. a turntable; 4. a blade; 5. a steam nozzle; 6. a groove; 7. a steam guide sheet; 8. a steam header.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Examples

As shown in fig. 1-3, for the utility model discloses a steam turbine for cogeneration heat supply usefulness, including casing 1, pivot 2, carousel 3, blade 4 and steam nozzle 5, pivot 2 rotates with casing 1 to be connected, and 3 fixed connection of carousel are in pivot 2, and the even fixed connection of blade 4 is on the lateral wall of carousel 3, and steam nozzle 5 fixed connection is on the lateral wall of casing 1, and steam nozzle 5 is towards the working face of blade 4. The new steam that steam boiler produced directly spouts to blade 4 through steam nozzle 5, thereby drive pivot 2 and rotate, convert the heat energy of steam into the function of pivot 2, thereby pivot 2 is connected with generating set and generates electricity, heat supply in the leading-in heat supply network of steam in the 1 inner chamber of casing, this structure steam directly spouts to blade 4, thereby avoid among the prior art steam to spout from the side of blade, one-level effect, lead to turbine exit blade 4 longer and longer, cause the bulky of steam turbine, and the floor area is big. Six steam nozzles 5 are arranged, the six steam nozzles 5 are communicated with a steam main pipe 8, and the steam nozzles 5 are fixedly connected to the side wall of the shell 1 at equal intervals.

The blade 4 is a quarter ellipse, one side of the plane of the blade 4 is provided with a groove 6, the blade 4 is arranged obliquely, and the plane of the blade 4 and the tangent plane of the contact point of the rotating disc 3 form an included angle of 60 degrees. After the steam is sprayed into the groove 6, the arc-shaped wall of the groove 6 is arranged to block the steam and prevent the steam from diffusing, so that the steam can drive the blades 4 to rotate better. The plane of the blade 4 is fixedly connected with a steam guide sheet 7 for guiding steam into the groove 6, and the steam guide sheet 7 is radial. The steam guide plate 7 is convenient for guiding steam to the inside of the groove 6, and in addition, the steam guide plate 7 further blocks the diffusion of the steam, so that the steam can better drive the blades to rotate.

Claims

1. The utility model provides a steam turbine for cogeneration supplies heat to use, its characterized in that, includes casing (1), pivot (2), carousel (3), blade (4) and steam nozzle (5), pivot (2) rotate with casing (1) and are connected, carousel (3) fixed connection is on pivot (2), the even fixed connection of blade (4) is on the lateral wall of carousel (3), steam nozzle (5) fixed connection is on the lateral wall of casing (1), steam nozzle (5) are towards blade (4).

2. A turbine for combined heat and power generation and supply according to claim 1, characterized in that the blades (4) are quarter-ellipse shaped, one side of the plane of the blades (4) is provided with a groove (6), the blades (4) are arranged obliquely, and the plane of the blades (4) forms an angle of 60 ° with the tangent plane of the contact point of the rotating disk (3).

3. A turbine for combined heat and power generation and supply according to claim 2, characterised in that steam guiding vanes (7) for guiding steam into the grooves (6) are fixedly attached to the plane of the blades (4), said vanes (7) being radial.

4. A turbine for combined heat and power generation and supply according to any one of claims 1 to 3, characterised in that six steam nozzles (5) are provided, six steam nozzles (5) being connected to a steam main (8), and the steam nozzles (5) being fixedly connected to the side wall of the casing (1) at equal intervals.