CN221169678U

CN221169678U - Electric heat energy driving device

Info

Publication number: CN221169678U
Application number: CN202323424337.9U
Authority: CN
Inventors: 刘晓艳; 宋西春
Original assignee: Shandong Construction Planning And Design Institute Co ltd
Current assignee: Shandong Construction Planning And Design Institute Co ltd
Priority date: 2023-12-14
Filing date: 2023-12-14
Publication date: 2024-06-18
Anticipated expiration: 2033-12-14

Abstract

The utility model belongs to the technical field of auxiliary equipment of generators, in particular to an electric power heat energy driving device which comprises a turbine, a main air supply path and a main air exhaust path, wherein a negative pressure chamber is arranged on the main air exhaust path in series; the air inlet end of the branch air supply channel is connected with the main air supply channel, the air outlet end of the branch air supply channel and the air outlet end of the main air exhaust channel are connected with a turbine exhaust fan together, and the turbine exhaust fan is driven to rotate by high-pressure steam in the branch air supply channel to accelerate the main air exhaust channel. The turbine exhaust fan is driven by the branch air supply path of the high-pressure steam, accelerates the main exhaust path to exhaust, ensures that the exhaust speed is slightly higher than the air supply speed of the turbine by the main air supply path, and forms negative pressure in the negative pressure chamber at the moment, thereby eliminating the obstruction of the air outlet end of the turbine on the high-pressure steam and improving the energy conversion efficiency.

Description

Electric heat energy driving device

Technical Field

The utility model belongs to the technical field of auxiliary equipment of generators, and particularly relates to an electric power and heat energy driving device.

Background

At present, thermal power generation is still the main power generation mode in China, the turbine is driven by high-pressure flowing steam to drive the rotor of the generator set to rotate so as to generate power, in the secondary process, the high-pressure steam enters from the air inlet end of the turbine and is discharged from the air outlet end of the turbine, if the power of the turbine is required to be improved, the pressure and the flow rate of the steam are increased at the air inlet end of the turbine, a large amount of steam is accumulated at the air outlet end of the turbine to form a local high-pressure state after passing through the turbine, so that the pressure difference between the front end and the rear end of the turbine cannot reach a preset difference value, and the energy conversion efficiency is reduced.

Disclosure of Invention

The utility model aims to provide an electric power heat energy driving device which can improve the energy conversion efficiency in the thermal power generation process.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the electric heat energy driving device comprises a turbine, a main air supply path and a main air exhaust path, wherein a negative pressure chamber is arranged on the main air exhaust path in series;

The air inlet end of the branch air supply channel is connected with the main air supply channel, and the air outlet end of the branch air supply channel and the air outlet end of the main air exhaust channel are connected with a turbine exhaust fan.

Optionally, the main air supply line is provided with a main valve and a second throttle valve, the branch air supply line is connected to the main air supply line between the main valve and the second throttle valve, and the branch air supply line is provided with a first throttle valve.

Optionally, the turbine exhaust fan includes first exhaust fan group and the second exhaust fan group of coaxial setting, first exhaust fan group cluster is established on main exhaust road, and the second exhaust fan group cluster is established on branch air supply road, connect the blast pipe behind the gas outlet parallel connection of first exhaust fan group and second exhaust fan group.

Optionally, turbine air discharge fan includes first body, second body and the tubule section of integrative setting, the tubule section is located between first body and the second body, the inboard rotation of tubule section is installed the axis body, and the side of axis body just is located the inside fixed mounting of first body and has first leaf group, the side of axis body just is located the inboard fixed mounting of second body and has second leaf group, the top fixedly connected with first air inlet branch of first body, the side of first body just is close to first body bottom and is connected with first air inlet branch, the bottom fixedly connected with second air inlet branch of second body, the side of second body just is close to the top fixed mounting of second body has second air inlet branch.

Optionally, the tubule section and the bottom of the first pipe body, the tubule section and the top of the second pipe body all form step surfaces, and the side of the shaft body is provided with a first bearing and a second bearing respectively for the two step surfaces.

Optionally, the first leaf group and the second leaf group have symmetrical structures.

Optionally, the first and second vane groups are each a multi-stage impeller group.

Compared with the prior art, the utility model has the following beneficial effects:

According to the utility model, the negative pressure chamber is arranged in series on the main exhaust path, the turbine exhaust fan is arranged and driven by the branch air supply path of the high-pressure steam, so that the main exhaust path is accelerated to exhaust, the exhaust speed is slightly higher than the air supply speed of the turbine by the main air supply path, and at the moment, negative pressure is formed in the negative pressure chamber, so that the obstruction of the air outlet end of the turbine to the high-pressure steam is eliminated, and the energy conversion efficiency is improved; in the actual use process, the high-pressure steam quantity in the branch air supply path for driving the turbine exhaust fan to rotate is less than 3% of the high-pressure steam in the main air supply path, the energy conversion efficiency of the turbine is improved by more than 5%, and particularly in the high-power operation process, the energy conversion efficiency of the traditional turbine is lower, so that the energy conversion efficiency is improved by using the utility model.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an overall schematic of the present utility model;

FIG. 2 is a schematic perspective view of a turbine exhaust fan according to the present utility model;

FIG. 3 is a schematic diagram of the front view of the turbine exhaust fan of the present utility model;

FIG. 4 is a schematic cross-sectional view of the structure at A-A in FIG. 3;

Fig. 5 is a schematic perspective view of a double-vane shaft assembly of the turbine exhaust fan of the present utility model.

In the figure: 1. a turbine; 2. a main air supply path; 3. a branch air supply path; 4. a first throttle valve; 5. a main valve; 6. a second throttle valve; 7. a negative pressure chamber; 8. a turbine exhaust fan; 801. a first tube body; 802. a second tube body; 803. a thin tube section; 804. a first exhaust branch pipe; 805. a second exhaust branch pipe; 806. a first intake manifold; 807. a second intake manifold; 808. a shaft body; 809. a first leaf group; 810. a second leaf group; 811. a first bearing; 812. a second bearing; 9. and an exhaust pipe.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The electric heat energy driving device provided by the embodiment of the utility model is described.

As shown in fig. 1-5, an electric heat energy driving device comprises a turbine 1, a main air supply path 2 for supplying air to the turbine 1, a main exhaust path for guiding out exhaust air for the turbine 1, and a branch air supply path 3, wherein a negative pressure chamber 7 is connected in series on the main exhaust path; the air inlet end of the branch air supply path 3 is connected with the main air supply path 2, the air outlet end of the branch air supply path 3 and the air outlet end of the main air exhaust path are connected with a turbine exhaust fan 8 together, and the turbine exhaust fan 8 is driven to rotate by high-pressure steam in the branch air supply path 3 to accelerate the air exhaust of the main air exhaust path.

The main gas supply path 2 provides high-pressure steam to drive the rotor of the turbine 1 to rotate, so that the rotor of the generator set is driven to rotate, and power generation is realized; the branch air supply pipeline 3 is used for driving the turbine exhaust fan 8 to rotate, and accelerating exhaust is carried out on the main exhaust pipeline, so that negative pressure is formed in the negative pressure chamber 7 or the pressure in the negative pressure chamber 7 is kept at a small level.

Compared with the prior art, the electric power heat energy driving device provided by the utility model has the advantages that the negative pressure chamber 7 is connected in series on the main exhaust path, the turbine exhaust fan 8 is arranged, the turbine exhaust fan 8 is driven by the branch air supply path 3 of high-pressure steam, the main exhaust path is accelerated to exhaust, the exhaust speed is slightly higher than the air supply speed of the main air supply path 2 serving as the turbine 1, and at the moment, negative pressure is formed in the negative pressure chamber 7, so that the obstruction of the air outlet end of the turbine 1 to the high-pressure steam is eliminated, and the energy conversion efficiency is improved; in the actual use process, the high-pressure steam amount in the branch air supply path 3 for driving the turbine exhaust fan 8 to rotate is less than 3% of the high-pressure steam in the main air supply path 2, so that the energy conversion efficiency of the turbine 1 is improved by more than 5%, and particularly, in the high-power operation process, the energy conversion efficiency of the traditional turbine 1 is lower, and the energy conversion efficiency is improved by using the utility model.

In another embodiment of the present utility model, referring to fig. 1 to 5, a main air supply path 2 is provided with a main valve 5 and a second throttle valve 6, a branch air supply path 3 is connected to the main air supply path 2 between the main valve 5 and the second throttle valve 6, and a branch air supply path 3 is provided with a first throttle valve 4.

When the turbine 1 is used, the flow rates in the branch air supply pipeline 3 and the main air supply pipeline 2 are controlled by controlling the first throttle valve 4 and the second throttle valve 6, so that proper proportion is carried out, and the high-pressure steam flow rate in the branch air supply pipeline 3 is generally required to be lower than 3% of the high-pressure steam flow rate in the main air supply pipeline 2, so that the turbine 1 keeps high efficiency.

In another embodiment of the present utility model, referring to fig. 1-5, the turbine exhaust fan 8 includes a first exhaust fan set and a second exhaust fan set coaxially arranged, the first exhaust fan set is serially arranged on the main exhaust path, the second exhaust fan set is serially arranged on the branch air supply path 3, and air outlets of the first exhaust fan set and the second exhaust fan set are connected in parallel and then connected to the exhaust pipe 9.

The first exhaust fan group and the second exhaust fan group work synchronously, and the first exhaust fan group and the second exhaust fan group are provided with a common shaft body 808, the rotation of the shaft body 808 is realized through the first exhaust fan group, and the discharge of the accelerated airflow is realized through the second exhaust fan.

In another embodiment of the present utility model, referring to fig. 1 to 5, the turbine exhaust fan 8 includes a first pipe 801, a second pipe 802 and a thin pipe 803 which are integrally arranged, the first pipe 801, the second pipe 802 and the thin pipe 803 are produced by adopting a casting process, then the inner wall is turned to form, the thin pipe 803 is located between the first pipe 801 and the second pipe 802, a shaft 808 is rotatably installed at the inner side of the thin pipe 803, a first vane group 809 is fixedly installed at the side of the shaft 808 and located inside the first pipe 801, a second vane group 810 is fixedly installed at the side of the shaft 808 and located at the inner side of the second pipe 802, the shaft 808, the first vane group 809 and the second vane group 810 form a double vane shaft assembly, so that the first vane group 809 and the second vane group 810 work synchronously, the top end of the first pipe 801 is fixedly connected with a first air inlet branch pipe 806, the side of the first pipe 801 is connected with a first exhaust branch pipe 804 near the bottom of the first pipe 801, the bottom of the second pipe 802 is fixedly connected with a second air inlet branch pipe 802 near the top of the second pipe 807, and the second air inlet pipe 802 is fixedly installed near the top of the second pipe 807.

In another embodiment of the present utility model, referring to fig. 1-5, the thin pipe section 803 and the bottom end of the first pipe body 801, the thin pipe section 803 and the top end of the second pipe body 802 form a step surface, and a first bearing 811 and a second bearing 812 are respectively installed on two step surfaces on the side surface of the shaft body 808, so that the shaft body 808 is rotatably installed by arranging the first bearing 811 and the second bearing 812.

In another embodiment of the present utility model, referring to fig. 1-5, the first blade set 809 and the second blade set 810 are symmetrical, and the air flows from the upper end or the lower end toward the middle.

In another embodiment of the present utility model, referring to fig. 1-5, the first blade set 809 and the second blade set 810 are multi-stage impeller sets, which improves the energy utilization efficiency of the branch air supply line 3 for separating high pressure steam.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. The utility model provides an electric power heat energy drive arrangement, includes turbine (1), main air supply circuit (2) and main exhaust circuit, its characterized in that: the main exhaust path is connected with a negative pressure cavity (7) in series;

The air inlet end of the branch air supply path (3) is connected with the main air supply path (2), and the air outlet end of the branch air supply path (3) and the air outlet end of the main air exhaust path are connected with a turbine exhaust fan (8) together.

2. The electric thermal energy drive of claim 1, wherein: the main air supply pipeline (2) is provided with a main valve (5) and a second throttle valve (6), the branch air supply pipeline (3) is connected to the main air supply pipeline (2) between the main valve (5) and the second throttle valve (6), and the branch air supply pipeline (3) is provided with a first throttle valve (4).

3. The electric heat energy driving device according to claim 1, wherein the turbine exhaust fan (8) comprises a first exhaust fan group and a second exhaust fan group which are coaxially arranged, the first exhaust fan group is arranged on the main exhaust path in a series manner, the second exhaust fan group is arranged on the branch air supply path (3) in a series manner, and air outlets of the first exhaust fan group and the second exhaust fan group are connected in parallel and then are connected with the exhaust pipe (9).

4. The electric heat energy driving device according to claim 1, wherein the turbine exhaust fan (8) comprises a first pipe body (801), a second pipe body (802) and a thin pipe section (803) which are integrally arranged, the thin pipe section (803) is located between the first pipe body (801) and the second pipe body (802), a shaft body (808) is rotatably installed on the inner side of the thin pipe section (803), a first blade group (809) is fixedly installed on the side surface of the shaft body (808) and located in the first pipe body (801), a second blade group (810) is fixedly installed on the side surface of the shaft body (808) and located in the inner side of the second pipe body (802), a first air inlet branch pipe (806) is fixedly connected to the top end of the first pipe body (801), a first exhaust branch pipe (804) is connected to the bottom of the first pipe body (801), a second air inlet branch pipe (802) is fixedly connected to the bottom end of the second pipe body (802), and a second air inlet branch pipe (807) is fixedly installed on the side surface of the second pipe body (802) and is close to the top of the second pipe body (807).

5. The electric thermal energy drive of claim 4, wherein: the side face of the shaft body (808) and the two step faces are respectively provided with a first bearing (811) and a second bearing (812).

6. The electric thermal energy drive of claim 4, wherein: the first leaf group (809) and the second leaf group (810) are of symmetrical structures.

7. The electric thermal energy drive of claim 4, wherein: the first (809) and second (810) sets of lobes are each multi-stage impeller sets.