CN210440090U

CN210440090U - Steam turbine engine

Info

Publication number: CN210440090U
Application number: CN201920914159.2U
Authority: CN
Inventors: 农良希
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-18
Filing date: 2019-06-18
Publication date: 2020-05-01
Anticipated expiration: 2029-06-18

Abstract

The utility model relates to a steam turbine engine. The steam turbine engine comprises a shaft-wound turbine, a steam generator for providing steam for the shaft-wound turbine and a water pump for pumping water for the steam generator; one part of power of the shaft type turbine is used for driving the water pump, and the other part of power is output through the rotating shaft. The utility model discloses a steam turbine engine rational utilization steam provides power, has partly power to drive the water pump and pumps water in the steam generator pipeline in succession, and another part power take off does not need additionally to add the motor drive water pump for other components and parts work, simple structure, easily small-size, miniaturized, efficient.

Description

Steam turbine engine

Technical Field

The utility model relates to an engine, concretely relates to steam turbine engine.

Background

For turbine engines or steam turbines, the kinetic energy is direct energy, the thermal energy is indirect energy, and the energy must be converted by an intermediary, such as steam generated by a boiler to drive a steam turbine. Existing steam turbines for thermal power plants include axial turbines, boilers, water pumps, motors, and the like. The heat generated by the fire coal provides heat energy for the boiler, and the motor drives the water pump to continuously pump water into the boiler. High-temperature and high-pressure steam generated by the boiler is led into the high-pressure turbine to do work, the temperature and the pressure of the steam coming out of the high-pressure turbine are reduced to some extent, and the steam needs to enter a reheater for heating. The heated steam is introduced into the medium-pressure turbine to do work, the temperature and the pressure of the steam coming out of the medium-pressure turbine are reduced, the steam needs to enter the reheater again to be reheated, then the low-pressure turbine is driven, and the heat energy generated by the fuel is converted into mechanical energy as much as possible to be output so as to drive the generator to generate electricity. The traditional steam turbine needs to be additionally provided with a motor-driven water pump, and is complex in structure and large in occupied space.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a steam turbine engine to the above-mentioned defect among the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a steam turbine engine includes a shaft turbine, a steam generator for supplying steam to the shaft turbine, and a water pump for pumping water from the steam generator.

In the above technical scheme:

the power output by the shaft-winding turbine is partially used for driving the water pump and partially used for driving a load. And a rotating shaft of the water pump penetrates through two ends of the water pump, one end of the rotating shaft is driven by the shaft type turbine, and the other end of the rotating shaft outputs power. The water pump can be provided with a plurality ofly, and at this moment, a plurality of water pumps share same root pivot. Preferably, the water pump is a plunger pump. The plunger pump has small volume, can provide higher pressure, has higher efficiency and is beneficial to the arrangement of the rotating shaft.

The water supply line of the steam turbine engine needs to ensure sufficient water quantity, so the water inlet pipeline of the water pump should be connected with the water storage tank. In order to realize the cyclic utilization of water resources, a condenser is connected between a steam outlet of the axial turbine and the water storage tank through a pipeline.

Since the rotor of the shaft-wound turbine has several thousand and several ten thousand revolutions per minute, the water pump is difficult to bear the high revolution speed. And a speed reducer is connected between the axial turbine and the water pump in a transmission way.

And a starting motor for driving the shaft turbine can be further arranged on one side of the shaft turbine back to the output end of the shaft turbine. The output shaft of the starting motor is used for driving the rotor of the shaft type turbine to rotate, and is mainly used for starting the operation of the shaft type turbine, and the shaft type turbine drives the water pump to provide water required initially for the steam generator so as to generate steam. When enough steam pushes the shaft type turbine, the starting motor is closed, and the continuous circulating operation of the whole system can be realized.

The steam generator is preferably a coil steam generator. The heat exchange tube inside the steam generator is spirally coiled and can also be coiled on the surface of a reheating object to absorb heat, thereby generating high-temperature and high-pressure steam. The heat exchange tube of the steam generator is made of a seamless steel tube, and water can be directly heated to a supercritical state without a steam drum. Water flows into the heat exchange tube from one end of the steam generator, absorbs heat to become steam and then flows out from the other end. The heat source and the water flow direction reversely flow through the heat exchange tube to exchange heat.

Furthermore, the steam turbine engine can be provided with a control device. The control device can select different components and connection modes according to different heat sources of the steam generator, arrangement of a water supply pipeline and a steam pipeline and the like. For example, the control device comprises a controller, and an electromagnetic throttle valve, an electromagnetic pressure regulating valve, a temperature sensor and a pressure sensor which are respectively and electrically connected with the controller; the pressure sensor is arranged at the opening of the water pump; the temperature sensor is arranged on the coil pipe of the steam generator; the electromagnetic pressure regulating valve is arranged at the inlet of the shaft-wound turbine; the electromagnetic throttle valve is arranged at the inlet of the water pump. For another example, the control device includes a controller and an electromagnetic throttle valve; the electromagnetic throttle valve is arranged at the inlet of the water pump and is electrically connected with the controller. For another example, the control device comprises a controller and an electromagnetic overflow valve; the electromagnetic overflow valve is arranged at the inlet of the steam generator and is electrically connected with the controller.

Compared with the prior art, the utility model has the advantages that:

the utility model discloses a steam turbine engine, rational utilization steam provides power, has partly power to drive the water pump in succession toward steam generator pipeline pump water, and another part power take off does not need additionally to add the motor and for water pump water for pivot output, has practiced thrift equipment input cost, has reduced the occupation space of whole equipment.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments or the related art descriptions will be briefly described below.

FIG. 1 is a schematic view of the overall structure of a steam turbine engine.

Fig. 2 is an internal structural view of a main portion of the steam turbine engine.

Description of reference numerals:

the system comprises a water pump 1, a speed reducer 2, a shaft-type turbine 3, a starting motor 4, a steam generator 5, a control device 6, a condenser 7, a water storage tank 8, a rotating shaft 9, an electromagnetic throttle valve 61, a pressure sensor 62, an electromagnetic pressure regulating valve 63, a controller 64, an electromagnetic overflow valve 65 and a temperature sensor 66.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the following detailed description of the present invention, taken in conjunction with the accompanying drawings and the detailed description, is given in a non-limiting manner.

As shown in fig. 1 and 2, the steam turbine engine includes a turbine 3 around a shaft, a steam generator 5 for supplying steam to the turbine 3 around the shaft, a water pump 1 for pumping water to the steam generator, and a starter motor 4 for driving the turbine 3 around the shaft. The shaft-wound turbine 3 is connected with a steam generator 5 in a pipeline way, and the steam generator 5 is connected with the water pump 1 in a pipeline way. The starting motor 4 is arranged on the side of the shaft-winding turbine 3 facing away from the output end. A rotating shaft 9 of the water pump 1 penetrates through two ends of the water pump 1, one end of the rotating shaft 9 is driven by the shaft type turbine 3, and the other end of the rotating shaft outputs power. The two water pumps 1 are arranged, and the two water pumps 1 share the same rotating shaft 9. The water pump 1 is a plunger pump. The steam generator 5 is a coil type steam generator. The heat source acts on the steam generator 5, and after the internal heat exchange tube is heated to a certain temperature, the starting motor 4 is started to drive the plunger pump to pump water into the steam generator 5. The water flowing through the steam generator 5 is gradually heated into high-temperature high-pressure steam, and the high-temperature high-pressure steam enters the shaft-winding turbine 3 to push the rotor of the shaft-winding turbine 3 to rotate, so that the plunger pump is driven to pump water. After the rotor of the shaft-winding turbine 3 stably rotates, the starting motor 4 is closed, and the continuous circulating operation of the whole system can be realized. A speed reducer 2 is connected between the shaft-winding turbine 3 and the water pump 1 in a transmission way. Part of the power after the speed reduction transmission is output by the rotating shaft 9, and the other part of the power drives the plunger pump to continuously pump water to the steam generator 5. The axial turbine comprises a casing, a rotor and a rotating shaft; a movable chamber is arranged in the shell, and a fluid inlet pipe and a fluid outlet pipe which are communicated with the movable chamber are arranged on the side wall of the movable chamber; the rotor is arranged in the movable chamber and comprises a wheel disc and a plurality of blades surrounding the wheel disc, two adjacent blades are mutually staggered, and two blades separated by one position are mutually aligned; the rotor is fixedly connected with the rotating shaft.

The water inlet pipeline of the water pump 1 is connected with a water storage tank 8. A condenser 7 is connected between the steam outlet of the shaft-winding turbine 3 and the water storage tank 8 through a pipeline. The steam flowing out of the shaft-wound turbine 3 enters the condenser 7 through a pipeline, is condensed into liquid water in the condenser 7, and then returns to the water storage tank 8 through a pipeline.

The steam turbine engine also comprises a control device 6. The control device 6 has three configurations.

First, when the heat source of the steam generator 5 is controllable, the control device 6 includes a controller 64, and an electromagnetic throttle valve 61, an electromagnetic pressure regulating valve 63, a temperature sensor 66, and a pressure sensor 62 electrically connected to the controller 64, respectively. The pressure sensor 62 is provided at the opening of the water pump 1. The temperature sensor 66 is arranged on the steam generator 5 coil. The electromagnetic pressure regulating valve 63 is provided at the inlet of the orbiting turbine 3. The electromagnetic throttle valve 61 is provided at the inlet of the water pump 1. The controller 64 is inputted with a preset temperature, when the temperature sensor 66 detects that the temperature of the steam coil rises above a set temperature value, the controller 64 controls the opening of the electromagnetic throttle valve 61 to control the amount of water entering the steam generator 5, thereby maintaining the steam temperature constant. The axial turbines 3 may be two in parallel. When the pressure sensor 62 detects that the water pressure flowing into the steam generator 5 is too low, the electromagnetic pressure regulating valve 63 can reduce the flow rate of the steam flowing into the shaft-type turbine 3 for ensuring the efficiency, or completely block the steam from entering one of the shaft-type turbines 3, so as to ensure that the steam pressure flowing into the shaft-type turbine 3 is constant. At the moment, the rotating speed and the power of the steam turbine engine can be controlled by controlling the heat quantity of the heat source.

Secondly, when the heat source of the steam generator 5 is not controllable, the control device 6 includes a controller 64 and an electromagnetic throttle valve 61. The electromagnetic throttle valve 61 is disposed at the inlet of the water pump 1 and electrically connected to the controller 64. The rotation speed and power of the steam turbine engine can be controlled by controlling the flow rate of the electromagnetic throttle valve 61.

Thirdly, the control device 6 comprises a controller 64 and an electromagnetic overflow valve 65 electrically connected with the controller 64. The electromagnetic overflow valve 65 is arranged at the inlet of the steam generator 5, and the electromagnetic overflow valve 65 is connected with the water storage tank 8 through a pipeline. The water pressure is controlled by adjusting the pressure split by the electromagnetic overflow valve 65, so that the rotating speed and the power of the steam turbine engine are controlled.

It should be noted that the above-mentioned preferred embodiments are only for illustrating the technical concepts and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention accordingly, and the protection scope of the present invention cannot be limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A steam turbine engine comprising a shaft turbine, a steam generator for providing steam to the shaft turbine, and a water pump for pumping water from the steam generator, wherein: the rotating shaft of the water pump penetrates through two ends of the water pump, one end of the rotating shaft is driven by the shaft type turbine, the other end of the rotating shaft outputs power, and part of the power output by the shaft type turbine is used for driving the water pump.

2. The steam turbine engine of claim 1, wherein: the water pump is provided with a plurality ofly, and same pivot is shared to a plurality of water pumps.

3. The steam turbine engine of claim 1 or 2, wherein: the water pump is a plunger pump.

4. The steam turbine engine of claim 1, wherein: and a water inlet pipeline of the water pump is connected with the water storage tank.

5. The steam turbine engine of claim 4, wherein: and a condenser is connected between a steam outlet of the axial turbine and the water storage tank through a pipeline.

6. The steam turbine engine of claim 1, wherein: and a speed reducer is connected between the axial turbine and the water pump in a transmission way.

7. The steam turbine engine of claim 1, wherein: and a starting motor for driving the shaft turbine is arranged on one side of the shaft turbine back to the output end of the shaft turbine.

8. The steam turbine engine of claim 1, wherein: the steam generator is a coil type steam generator.

9. The steam turbine engine of claim 1, wherein: a control device is also arranged; the control device comprises a controller, and an electromagnetic throttle valve, an electromagnetic pressure regulating valve, a temperature sensor and a pressure sensor which are respectively and electrically connected with the controller; the pressure sensor is arranged at the opening of the water pump; the temperature sensor is arranged on the coil pipe of the steam generator; the electromagnetic pressure regulating valve is arranged at the inlet of the shaft-wound turbine; the electromagnetic throttle valve is arranged at the inlet of the water pump;

or, the control device comprises a controller and an electromagnetic throttle valve; the electromagnetic throttle valve is arranged at the inlet of the water pump and is electrically connected with the controller;

or the control device comprises a controller and an electromagnetic overflow valve electrically connected with the controller; the electromagnetic overflow valve is arranged at the inlet of the steam generator and is connected with the water storage tank through a pipeline.