CN115492690A - A light multi-shaft gas turbine starting structure and starting method - Google Patents

Abstract

A light-duty multi-shaft gas turbine starting structure and starting method, the starting structure includes a gas generator, a power turbine shaft, a clutch, a coupling and a generator; the gas generator and the power turbine shaft are connected through a clutch; the generator is connected through a coupling It is connected with the power turbine shaft; the clutch active component is connected with the power turbine shaft, and the clutch driven component is connected with the gas generator. The starting method is as follows: when the gas turbine needs to be started, first control the clutch to be in the engaged state, then use the generator as a motor to drive the power turbine shaft to rotate through the generator, and then drive the gas generator to rotate synchronously through the engaged clutch, and The oil supply and ignition steps are completed during the up-rotation period. When the rotation of the gas generator reaches the disengagement speed, the connection between the driving component and the driven component of the clutch is cut off, so that the gas generator continues to up-rotate under the control of the starting program. Idle speed until the start-up process of the gas turbine is completed.

Description

A light multi-shaft gas turbine starting structure and starting method

technical field

The invention belongs to the technical field of gas turbines, and in particular relates to a starting structure and a starting method of a light multi-shaft gas turbine.

Background technique

For some light multi-shaft gas turbines, due to the special structure, the power turbine shaft passes through the inside of the gas generator, so that the two ends of the gas generator cannot be directly connected to the external power device (starter motor).

At present, the traditional solution is to add a bevel gear to the gas generator, and transmit the power of the starter motor to the gas generator through a pair of bevel gears. However, since the entire transmission system needs to be equipped with bevel gears, transmission shafts, reduction gears, clutches, and couplings, etc., resulting in a complex structure of the transmission system, this starting method will significantly increase the overall product cost of the gas turbine, thereby reducing product competitiveness. .

Contents of the invention

Aiming at the problems existing in the prior art, the present invention provides a light-duty multi-shaft gas turbine starting structure and starting method. By installing an automatic or manual control clutch between the power turbine shaft and the gas generator, the generator is used as a motor to Drive the power turbine shaft, and then transmit the starting torque to the gas generator through the clutch to realize the start of the gas turbine, which not only simplifies the structure of the transmission system, but also effectively reduces the cost of the complete product of the gas turbine, which is conducive to the improvement of product competitiveness.

In order to achieve the above object, the present invention adopts the following technical solutions: a light multi-shaft gas turbine starting structure, including a gas generator, a power turbine shaft, a clutch, a shaft coupling and a generator; The clutch is connected and matched; the generator is connected with the power turbine shaft through a shaft coupling; the active assembly of the clutch is connected with the power turbine shaft, and the driven assembly of the clutch is connected with the gas generator.

Described clutch adopts the clutch of automatic control or the clutch of manual control.

A method for starting a light multi-shaft gas turbine, which adopts the starting structure of a light multi-shaft gas turbine, specifically: when the gas turbine needs to be started, firstly control the active assembly and the driven assembly of the clutch to be in the engaged state, and then use the generator as a motor , through the generator to drive the power turbine shaft to rotate, and then through the clutch in the engaged state to drive the gas generator to rotate up synchronously, and complete the oil supply and ignition steps during the up-rotation period, when the rotation of the gas generator reaches the disengagement speed, Cut off the connection between the active component and the driven component of the clutch, so that the gas generator continues to rise to the idle speed under the control of the starting program until the starting process of the gas turbine is completed.

Beneficial effects of the present invention:

In the starting structure and starting method of the light multi-shaft gas turbine of the present invention, an automatic control or manual control clutch is installed between the power turbine shaft and the gas generator, and the generator is used as a motor to drive the power turbine shaft, and then the starting The torque is transmitted to the gas generator to realize the start of the gas turbine, which not only simplifies the structure of the transmission system, but also effectively reduces the cost of the whole product of the gas turbine, which is conducive to the improvement of product competitiveness.

Description of drawings

Fig. 1 is a structural principle diagram of a light-duty multi-shaft gas turbine starting structure of the present invention;

In the figure, 1—gas generator, 2—power turbine shaft, 3—clutch, 3.1—driving component, 3.2—driven component, 4—coupling, 5—generator.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, a kind of light multi-shaft gas turbine starting structure comprises gas generator 1, power turbine shaft 2, clutch 3, shaft coupling 4 and generator 5; The generator 5 is connected with the power turbine shaft 2 through the shaft coupling 4; the active assembly 3.1 of the clutch 3 is connected to the power turbine shaft 2, and the driven assembly 3.2 of the clutch 3 is connected to the Gas generator 1 on.

Described clutch 3 adopts the clutch of automatic control or the clutch of manual control.

A method for starting a light multi-shaft gas turbine, which adopts the starting structure of a light multi-shaft gas turbine, specifically: when the gas turbine needs to be started, firstly control the active component 3.1 of the clutch 3 and the driven component 3.2 to be in the engaged state, and then generate electricity Engine 5 acts as an electric motor, drives the power turbine shaft 2 to rotate through the generator 5, and then drives the gas generator 1 to rotate synchronously through the clutch 3 in the engaged state, and completes the steps of oil supply and ignition during the upgrade period, when the gas generator When the rotation of 1 reaches the disengagement speed, the connection between the active component 3.1 and the driven component 3.2 of the clutch 3 is cut off, so that the gas generator 1 continues to rise to the idle speed under the control of the starting program until the starting process of the gas turbine is completed.

The solutions in the embodiments are not intended to limit the scope of patent protection of the present invention, and all equivalent implementations or changes that do not deviate from the present invention are included in the patent scope of this case.

Claims (3)

1. A light-duty multiaxis gas turbine starts structure which characterized in that: the device comprises a fuel gas generator, a power turbine shaft, a clutch, a coupler and a generator; the fuel gas generator is connected and matched with the power turbine shaft through a clutch; the generator is connected with the power turbine shaft through a coupler; the driving assembly of the clutch is connected to the power turbine shaft, and the driven assembly of the clutch is connected to the gas generator.

2. A light-weight multi-shaft gas turbine starting structure according to claim 1, wherein: the clutch adopts an automatically controlled clutch or a manually controlled clutch.

3. A light-weight multi-shaft gas turbine starting method using the light-weight multi-shaft gas turbine starting structure of claim 1, characterized by comprising: when the gas turbine needs to be started, firstly, a driving component and a driven component of the clutch are controlled to be in a joint state, then the generator is used as a motor, the power turbine shaft is driven to rotate by the generator, the gas generator is driven to synchronously rotate through the clutch in the joint state, the oil supply and ignition steps are completed during the rotation, when the rotation of the gas generator reaches the disengaging rotation speed, the connection between the driving component and the driven component of the clutch is cut off, and the gas generator continues to rotate to the slow vehicle rotation speed under the control of a starting program until the starting process of the gas turbine is completed.

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