Long cantilever dual rail gas turbine operation guide rail device

Abstract

The application relates to a long cantilever double-track gas turbine operation guide rail device, which comprises double guide rails and a guide rail support structure, the double guide rails are symmetrically installed on both sides of the gas turbine, the upper and lower guide rails of the double guide rails are fixedly connected through connecting assemblies and are connected with support columns; a front support point of a gas generator is located on an axis horizontal plane and is located at the front end of the generator, a generator air inlet roller runs on the lower guide rail; a rear support point is located on an intercooler, a generator intermediate roller runs on the upper guide rail; two front and rear support points of a power turbine are located on the axis horizontal plane, and the power turbine and the front and rear rollers run on the upper guide rail. The front and rear rollers are respectively located in the two guide rail grooves and run along different tracks, the double-track operation guide rail device can reduce the risk of structural interference, the guide rail support tool can be fixed on both sides of the intercooler, the span of the support tool is effectively reduced, and the stability of a gas turbine inlet and outlet box body process is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a marine gas turbine generator unit, in particular to a gas turbine operation guide rail device. BACKGROUND

[0002] The gas turbine operation guide rail device is used to turn the two main structures of the gas generator and the power turbine from the horizontal direction to the vertical direction by using the gas turbine air inlet space, through the cooperation of the guide rail track and the operation tool, and to make the gas turbine run outside the box body. At present, the single rail type operation guide rail is used for the gas turbine box body, and the front and rear support rollers on the same side run in the same guide rail. There is an interference risk between the farthest point of the gas turbine contour and the chassis. Due to the small radius of the core machine area of the inter-cooled gas turbine, the guide rail support tool has a too long span and poor operation stability. SUMMARY

[0003] The present application provides a long cantilever double rail type gas turbine operation guide rail device, which adopts front and rear rollers located in two guide rail grooves and runs along different tracks. The double rail type operation guide rail device can reduce the risk of structural interference, the guide rail support tool can be fixed on both sides of the inter-cooler, effectively reducing the span of the support tool, and improving the stability of the gas turbine during entering and exiting the box body.

[0004] To achieve the above-mentioned purpose, the scheme of the present application is as follows: a long cantilever double rail type gas turbine operation guide rail device, comprising a double guide rail and a guide rail support structure, the double guide rail is symmetrically installed on both sides of the gas turbine, the upper and lower guide rails of the double guide rail are fixedly connected through a connecting assembly and connected with a support column; the front support point of the gas generator is located on the horizontal plane of the axis and at the front end of the generator, and the generator inlet roller runs in the lower guide rail; the rear support point is located on the inter-cooler, and the generator intermediate roller runs in the upper guide rail; the front and rear support points of the power turbine are located on the horizontal plane of the axis, and the power turbine and the front and rear rollers run in the upper guide rail.

[0005] Further, the guide rail support structure comprises a guide rail body, a generator lifting flange, a power turbine lifting flange, a roller assembly and a support assembly.

[0006] Further, the cavity of the guide rail body adopts a C-shaped structure and cooperates with the roller.

[0007] Further, the generator lifting flange is fixedly connected with the gas turbine inlet and is pulled by a lifting tool at the front end.

[0008] Further, the power turbine lifting flange is fixedly connected with the power turbine inlet and also serves as the support of the roller, and the rollers are installed on both sides.

[0009] Further, the roller assembly includes three specifications, namely the power turbine roller, the generator roller and the inter-cooler roller.

[0010] Further, the generator support in the support assembly is installed at the front end of the gas generator, and the rollers are installed on both sides.

[0011] The beneficial effects of the present application are:

[0012] The front and rear rollers of the present application are respectively located in two guide rail grooves and run along different trajectories. The double-track running guide rail device can reduce the risk of structural interference. The guide rail support tool can be fixed on both sides of the intercooler, effectively reducing the span of the support tool and improving the stability of the gas turbine in-box assembly process.

[0013] According to the running trajectory of the gas turbine contour line, the running space in the gas turbine in-box assembly is smaller than that of the single-track guide rail device. The local stress of the guide rail under special working conditions is better than that of the single-track guide rail device. The double-track gas turbine running guide rail device has been applied in a certain intercooled gas turbine in-box assembly engineering project, and the effect is good. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a schematic diagram of the gas generator and the gas turbine guide rail;

[0015] Figure 2 is a left view of Figure 1 ;

[0016] Figure 3 is a schematic diagram of the power turbine and the gas turbine guide rail;

[0017] Figure 4 is a left view of Figure 3 ;

[0018] Figure 5 is a schematic diagram of the gas turbine guide rail;

[0019] Figure 6 is a schematic diagram of the gas generator running state;

[0020] wherein a is state one, b is state two, c is state three, and d is state four,

[0021] Figure 7 is a schematic diagram of the gas turbine running trajectory;

[0022] wherein a is the gas generator running trajectory, and b is the power turbine running trajectory;

[0023] Figure 8 is a schematic diagram of the generator lifting flange in the gas turbine guide rail support structure;

[0024] Figure 9 is a left sectional view of Figure 8 ;

[0025] Figure 10is a schematic diagram of a power turbine lifting flange in a gas turbine guide rail support structure;

[0026] Figure 11 is a left sectional view of Figure 10 ;

[0027] Figure 12 is a right view of Figure 10 ;

[0028] Figure 13 is a schematic diagram of a roller assembly in a gas turbine guide rail support structure;

[0029] wherein: a is a power turbine roller, b is a generator roller, and c is an intercooler roller;

[0030] Figure 14 is a schematic diagram of a generator intake support in a gas turbine guide rail support structure;

[0031] Figure 15 is a guide rail stress change trend diagram at front and rear rollers;

[0032] wherein: a is state two, b is state three, and c is state four;

[0033] Figure 16 is a guide rail strength calculation diagram;

[0034] wherein: a is a constraint state, b is a deformation cloud chart, and c is a stress cloud chart. DETAILED DESCRIPTION

[0035] The present application will be further described below in conjunction with the accompanying drawings and examples.

[0036] As shown in Figures 1 to 15 , a long cantilever double rail type gas turbine operation guide rail device of the present application comprises a hoisting track design scheme of double rails, a guide rail support structure design scheme, and special working condition guide rail strength simulation calculation, etc.

[0037] (1) Guide rail hoisting track design

[0038] A certain intercooled gas turbine main body is composed of a gas generator and a power turbine, wherein the intercooler has a large outer contour radius and is located in the middle and rear section of the gas generator, and the hoisting track of the double guide rails 1 can satisfy the lifting and back installation actions of the generator and the power turbine structures.

[0039] The front support point of the gas generator is on the axis horizontal plane, the generator air inlet support 3 is located at the front end of the generator, and the generator air inlet roller 2 runs on the lower guide rail; the rear support point is located on the intercooler, the installation hole center is 450 mm higher than the gas turbine axis, and the generator intermediate roller 4 runs on the upper guide rail; the front and rear support points of the power turbine are on the axis horizontal plane, the front and rear rollers 7 are raised to the position 450 mm above the axis through the support assembly, and the front and rear rollers 7 run on the upper guide rail. The support point and the double-layer guide rail 1 of the gas turbine cooperate in the manner as shown in Figures 1 to 5 .

[0040] As shown in Figure 6 , the gas generator roller running process includes the following states:

[0041] State one: the front and rear rollers run horizontally along the guide rail respectively;

[0042] State two: the front roller passes through the lower guide rail transition section, and the rear roller keeps horizontal running;

[0043] State three: the front roller runs vertically upward along the guide rail, and the rear roller keeps horizontal running;

[0044] State four: the front roller keeps vertical upward running along the guide rail, and the rear roller enters the upper guide rail transition section;

[0045] State five: the front and rear rollers keep vertical running along the guide rail.

[0046] The power turbine roller running process includes the following states:

[0047] State one: the front and rear rollers keep horizontal running along the upper guide rail;

[0048] State two: the front roller passes through the upper guide rail transition section, and the rear roller keeps horizontal running;

[0049] State three: the front roller runs vertically upward along the guide rail, and the rear roller keeps horizontal running;

[0050] State four: the front roller keeps vertical upward running along the guide rail, and the rear roller enters the upper guide rail transition section;

[0051] State five: the front and rear rollers keep vertical running along the guide rail.

[0052] The running track of the gas generator and the power turbine is as shown in Figure 7 , the outer contour line track of the gas turbine does not interfere with the bottom frame and the upper surface of the box body, and the scheme is feasible.

[0053] (2) Guide rail support structure design

[0054] As shown in Figures 8 to 14As shown, the guide rail support structure mainly comprises a guide rail body, a generator lifting flange 5, a power turbine lifting flange 6, a roller assembly, and a support assembly.

[0055] The cavity of the guide rail body adopts a C shape, cooperates with the rollers, and is connected with the support column. The gas turbine is symmetrically installed on both sides, and the upper and lower guide rails are fixedly connected through the connecting assembly. The generator lifting flange 5 is fixedly connected with the gas turbine inlet and can be pulled by the lifting tool at the front end. The power turbine lifting flange 6 is fixedly connected with the power turbine inlet and also serves as the support of the rollers, and the rollers are installed on both sides. The roller assembly includes three specifications, namely, the power turbine roller, the generator roller, and the intercooler roller. The generator support is installed at the front end of the gas generator, and the rollers are installed on both sides.

[0056] (3) Stress calculation of guide rail under special working conditions

[0057] For the second, third, and fourth states of the gas generator, the stress state of the guide rail is analyzed, in which the trends of the traction force, the front roller support force, and the rear roller support force with the change of the bend angle are as shown in Figure 15

[0058] The peak point working conditions of the guide rail stress in the three states are checked for strength. According to the calculation results, the stress at each position is much smaller than the material yield limit, and the deformation is very small, meeting the use requirements.

[0059] The limit stress calculation of the gas generator under the third state is as shown in the attached Figure 16 The maximum stress of the guide rail is 38 MPa, and the maximum deformation is about 0.3 mm.​

Claims

1. A long-span double rail gas turbine operation guide rail device, characterized by: The invention relates to a double guide rail and guide rail support structure, the double guide rail comprising a guide rail body, the guide rail support structure comprising a generator lifting flange, a power turbine lifting flange, a roller assembly and a support assembly, the double guide rail being symmetrically installed on both sides of a gas turbine, the upper and lower layers of the double guide rail being fixedly connected through a connecting assembly and connected with a support column; a front support point of the gas generator is located on the axis horizontal plane and at the front end of the gas generator, and a front roller of the gas generator runs on the lower layer of the guide rail; a rear support point of the gas generator is located on an intercooler, and a rear roller of the gas generator runs on the upper layer of the guide rail; two front and rear support points of the power turbine are located on the axis horizontal plane, and front and rear rollers of the power turbine run on the upper layer of the guide rail; the running process of the front and rear rollers of the gas generator comprises: state one: the front and rear rollers run horizontally along the lower layer of the guide rail and the upper layer of the guide rail respectively; state two: the front roller passes through a transition section of the lower layer of the guide rail, and the rear roller keeps horizontal running; state three: the front roller runs vertically upward along the lower layer of the guide rail, and the rear roller keeps horizontal running; state four: the front roller keeps vertical upward running along the lower layer of the guide rail, and the rear roller enters a transition section of the upper layer of the guide rail; and state five: the front and rear rollers keep vertical running along the lower layer of the guide rail and the upper layer of the guide rail respectively.

2. The long overhang dual rail gas turbine operational rail guide apparatus of claim 1, wherein: The cavity of the guide rail body adopts a C-shaped structure and cooperates with the roller.

3. The long overhang dual rail gas turbine operational rail guide apparatus of claim 1, wherein: The generator lifting flange is fixedly connected with the gas turbine inlet and is pulled by a lifting tool at the front end.

4. The long overhang dual rail gas turbine operational rail guide apparatus of claim 1, wherein: The power turbine lifting flange is fixedly connected with the power turbine inlet and simultaneously serves as a support roller, and rollers are installed on both sides.

5. The long overhang dual rail gas turbine operational rail guide apparatus of claim 1, wherein: The generator support in the support assembly is installed at the front end of the gas generator, and rollers are installed on both sides.

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