Gas turbine test chassis

Abstract

A gas turbine test underframe comprises a rack, the front end of the rack is detachably connected with two front supports which are symmetrically arranged, each front support comprises a front support base, the two sides of each front support base are connected with vertical plates of a flat strip-shaped structure respectively, the upper portions of the vertical plates are connected with a fixing frame, and the fixing frames are fixedly connected with a gas turbine. The rear end of the rack is detachably connected with two symmetrically-arranged rear supports, each rear support comprises a rear supporting frame, the upper portion of each rear supporting frame is connected with a lower bearing seat, the upper portion of each lower bearing seat is connected with an upper bearing seat, a connecting shaft is arranged between each lower bearing seat and the corresponding upper bearing seat, and each connecting shaft makes linear contact with the corresponding lower bearing seat and the corresponding upper bearing seat. The device can offset stress generated by stretching and retracting along the Y axis during a gas turbine test, the ball head is in linear contact with the lower bearing seat and the upper bearing seat, stress generated to the device when the device is heated and expanded by a gas generator is reduced and eliminated, the strength of the device can be improved through the vertical upright rod and the inclined rod, deformation of the device is prevented, and the service life of the device is prolonged. And the gas turbine can be stably supported by the device.

Description

Technical Field

[0001] The utility model relates to the field of gas turbines, in particular to a gas turbine test chassis. Background Art

[0002] As an energy conversion device, gas turbines have a wide range of applications, including ship propulsion, power generation, and oil production. Before a gas turbine is used, various performance tests are required. A gas turbine typically consists of a gas generator and a power turbine. Traditional testing methods typically involve testing the entire unit, requiring both the gas generator and the power turbine to be manufactured before testing can begin. This approach presents several challenges: first, it impacts project timelines; second, if the gas generator performance does not meet specifications during the entire unit test, the entire unit cannot be tested. For these reasons, we adopt a phased testing approach. We first test the gas generator, replacing the power turbine with a tail nozzle. This ensures that the test conditions remain unchanged for the gas generator, allowing for initial performance testing of the gas generator. Once the gas generator meets performance standards, the entire unit is tested together with the power turbine.

[0003] The advantages of doing it separately are:

[0004] First, the test period can be shortened, and the gas generator test can be carried out simultaneously with the power turbine processing and manufacturing.

[0005] Secondly, the performance can be tested by components. The gas generator is the power source of the whole machine. Only when the performance of the gas generator meets the standards can the performance of the whole machine be successful.

[0006] Third, the temperature in the local area of the gas generator test can reach 300 degrees Celsius, which is very high and can easily cause damage to the engine. Performing the gas generator test first can prevent the gas generator blades from breaking and causing damage to the power turbine, which would cause greater losses.

[0007] Conventional test chassis, designed for the entire unit, are insufficient for the gas turbine support required for testing. Existing test chassis are limited in variety and lack impact-resistant structures, making them susceptible to deformation during operation. Furthermore, the inability to disassemble them increases the workload during installation and transportation.

[0008] The gas turbine test chassis is an indispensable component in gas turbine testing, providing support for the test and having the following functions:

[0009] 1. Strengthen the casing structure: The bracket can enhance the overall spatial rigidity and stability of the gas turbine casing structure.

[0010] 2. Support the gas turbine: The bracket bears the gravity and vibration load of the gas turbine to ensure its stable operation during the test.

[0011] 3. Transfer impact force: During the impact resistance process, the bracket can transfer the shear force generated by the impact to protect the gas turbine from damage.

[0012] The existing gas turbine test chassis is connected to the gas turbine using a rigid support method, which cannot adapt to step-by-step gas turbine testing. During the gas generator test, the flame ejected from the tail has a high temperature and the diameter of the gas generator tail expands severely. The rigid support method is subject to the following forces: first, the gas generator expands due to heat, which exerts force on the rigid support; second, the rigid support frame itself generates internal stress due to the high temperature of the flame; third, when the gas generator flame is skewed, the bracket is subjected to unbalanced force. The interaction of the above forces will cause damage to the bottom test chassis, causing immeasurable losses. Utility Model Content

[0013] In view of the above-mentioned deficiencies in the prior art, the utility model provides a gas turbine test chassis with a spherical bearing connection method, which eliminates or reduces various stresses generated on the device during gas generator testing.

[0014] The purpose of this utility model is achieved through the following technical solutions:

[0015] A gas turbine test chassis comprises a frame, wherein the front end of the frame is detachably connected to two symmetrically arranged front supports, the front supports comprising a front support base, both sides of the front support base are respectively connected to vertical plates with flat strip structures, the upper parts of the vertical plates are connected to fixed frames, and the fixed frames are fixedly connected to the gas turbine, and the rear end of the frame is detachably connected to two symmetrically arranged rear supports, the rear supports comprising a rear support frame, the upper part of the rear support frame is connected to a lower bearing seat, the upper part of the lower bearing seat is connected to an upper bearing seat, a connecting shaft is provided between the lower bearing seat and the upper bearing seat, and the connecting shaft is in line contact with the lower bearing seat and the upper bearing seat.

[0016] The front support base is a T-shaped structure, and the bottom of the front support base is connected to the frame through fasteners.

[0017] The vertical plates are symmetrically arranged on both sides of the vertical plate of the front support base, the fixing frame support plate at the lower part of the fixing frame is clamped between the two vertical plates, and two symmetrical clamping plates are respectively provided on the upper and lower sides of the vertical plates. The front support base, the fixing frame, the vertical plates and the clamping plates are fixed together by fasteners.

[0018] The lower part of the rear support frame is provided with a vertical upright rod and an inclined rod in an inclined direction.

[0019] The bottoms of the vertical rods and the diagonal rods are connected to the frame through fasteners.

[0020] The ball head at one end of the connecting shaft forms line contact with the bearing seat formed by the lower bearing seat and the upper bearing seat.

[0021] The connecting plate on one side of the connecting shaft is detachably connected to the gas turbine.

[0022] Beneficial effects: The vertical plate is a flat strip structure. The vertical plate can be freely extended and retracted in the Y-axis direction, which can offset the stress generated by the expansion and contraction along the Y-axis during the gas turbine test. The ball head forms a line contact with the lower bearing seat and the upper bearing seat, so that the two rear supports can only limit the displacement of the gas turbine in the Y-axis and Z-axis directions. When the diameter of the gas turbine expands due to heat, the gas turbine can freely extend and retract in the X-axis direction, avoiding the force exerted on the device by the gas generator when it expands due to heat. When the flame of the gas generator is skewed, the gas turbine can rotate relative to the device, and the unbalanced force exerted by the gas turbine on the device will also be reduced. When the device expands due to heat, part of the stress can also be eliminated. The front support and the rear support work together to firmly support the gas turbine and reduce or eliminate various stresses generated by the gas turbine on the device during the test. The vertical vertical poles and the inclined diagonal poles can increase the strength of the device to ensure that the device can firmly support the gas turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of the gas turbine test chassis described in the present utility model.

[0024] Figure 2 This is a schematic diagram of the front support structure described in the present utility model.

[0025] Figure 3 This is a schematic structural diagram of the front support base described in the present utility model.

[0026] Figure 4 This is a structural schematic diagram of the fixing frame described in the present utility model.

[0027] Figure 5 This is a schematic diagram of the rear support structure described in the present utility model.

[0028] Figure 6 This is a schematic diagram of the connection structure of the connecting shaft and the bearing seat described in the present invention.

[0029] Figure 7 This is a schematic structural diagram of the rear support frame described in the present utility model.

[0030] Figure 8 This is a schematic structural diagram of the lower bearing seat described in the present utility model.

[0031] Figure 9 This is a schematic diagram of the connecting shaft structure described in the utility model. DETAILED DESCRIPTION

[0032] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments:

[0033] refer to Figures 1 to 4 The device includes a frame 110, and two symmetrical front supports 200 are respectively provided at the front end of the frame 110. The front supports 200 include a front support base 210. The front support base 210 is a T-shaped structure. The bottom surface of the front support base 210 and the frame 110 are connected by bolts. When in use, they can be quickly installed, reducing the workload of installation and transportation.

[0034] refer to Figures 1 to 4 Two symmetrical vertical plates 230 are provided on both sides of the middle plate of the front support base 210. The vertical plates 230 are flat strip structures. Referring to the coordinate system of the upper part of the gas turbine 120, the width of the fixing frame 220 in the X-axis direction is much larger than the thickness in the Y-axis direction. Two symmetrical clamping plates 240 are provided on the outer sides of the bottom of the two vertical plates 230. Bolts fasten the front support base 210, the vertical plates 230, and the clamping plates 240 together.

[0035] refer to Figures 1 to 4 A fixing frame 220 is provided on the upper part of the two vertical plates 230, and a fixing frame support plate 223 is provided at the lower part of the fixing frame 220 in a direction perpendicular to the fixing frame 220. The fixing frame support plate 223 is clamped between the two vertical plates 230. Two symmetrical clamping plates 240 are respectively provided on the upper part of the two vertical plates 230, and bolts fasten the vertical plates 230 and the clamping plates 240 together.

[0036] refer to Figures 1 to 4 A fixed core shaft 221 is provided in the middle of the fixing frame 220, and a group of evenly distributed fixing holes 222 are provided on the end surface of the fixing frame 220. During the test, the two fixed core shafts 221 are inserted into the mounting holes on both sides of the gas turbine 120. Bolts are provided in the fixing holes 222, and the bolts fasten the vertical plate 230 and the gas turbine 120 together.

[0037] The two vertical plates 230 are flat strip structures. The width of the fixing frame 220 in the X-axis direction is much larger than the thickness in the Y-axis direction. There is a gap between the two vertical plates 230. The two vertical plates 230 will bend and deform when subjected to a small bending moment in the Y-axis direction. The fixing frame 220 can withstand a larger bending moment in the X-axis direction. When testing the gas turbine 120, the gas turbine 120 will expand and contract in the Y-axis direction. At this time, the vertical plates 230 on both sides will bend freely to offset the stress generated by the gas turbine 120 on the device. Therefore, the gas turbine 120 can expand and contract freely in the Y-axis direction. In the X-axis direction, the front support 200 can position the gas turbine 120.

[0038] The two clamping plates 240 at the upper and lower parts of the vertical plate 230 can increase the connection strength among the front support base 210 , the fixing frame 220 and the vertical plate 230 .

[0039] Two symmetrical rear supports 300 are respectively provided at the rear end of the frame 110. The rear support 300 includes a rear support frame 310. The rear support frame 310 is a V-shaped structure with a horizontal bottom and inclined sides. A vertical vertical rod 311 is provided at the lower part of the horizontal plane of the rear support frame 310. A flange plate is provided at the bottom of the vertical rod 311. The flange plate at the bottom of the vertical rod 311 is connected to the frame 110 by bolts. An inclined diagonal rod 312 is provided on the outer side of the inclined surface of the rear support frame 310. A flange plate is also provided at the bottom of the diagonal rod 312. The flange plate at the bottom of the diagonal rod 312 is connected to the frame 110 by bolts. The vertical vertical rod 311 and the inclined diagonal rod 312 can increase the strength of the device, prevent the support 300 from deforming in the force direction, and ensure that the device can stably support the gas turbine 120.

[0040] A lower bearing seat 320 is provided on the upper part of the rear support frame 310, and a lower bearing seat flange 321 is provided at the bottom of the lower bearing seat 320. The lower bearing seat flange 321 is matched with the shape of the rear support frame 310. The rear support frame 310 and the lower bearing seat 320 are fixed together by bolts. An upper bearing seat 340 is provided on the upper part of the lower bearing seat 320. The lower bearing seat 320 and the upper bearing seat 340 are fixed together by bolts. The lower bearing seat 320 and the upper bearing seat 340 form a complete bearing seat. A ball head 331 is provided on one side of the connecting shaft 330. The ball head 331 connects the bearing seat composed of the lower bearing seat 320 and the upper bearing seat 340. The ball head 331 forms a line contact with the lower bearing seat 320 and the upper bearing seat 340.

[0041] One side of the connecting shaft 330 has a connecting plate 332, and the connecting plate 332 is fixed to the gas turbine 120 by bolts.

[0042] The ball head 331 forms line contact with the lower bearing seat 320 and the upper bearing seat 340, so that the two rear supports 300 can only limit the displacement of the gas turbine 120 in the Y-axis and Z-axis directions. During the test, the rear side of the gas turbine 120 is relatively stable, and the rear diameter expands due to heat. The gas turbine 120 can freely expand and contract in the X-axis direction, avoiding the force exerted on the rigid support by the thermal expansion of the gas generator. When the gas generator flame is skewed, the gas turbine 120 can rotate relative to the device, and the unbalanced force exerted on the device by the gas turbine 120 will also be reduced. When the device expands due to heat, some stress can also be eliminated.

[0043] When using this device, the gas turbine 120 is hoisted to a preset position, the two front supports 200 are installed on the front side of the frame 110 and fastened with bolts, the two rear supports 300 are installed on the rear side of the frame 110 and fastened with bolts, the fixed core shafts 221 on the left and right sides of the front support 200 are inserted into the positioning holes of the gas turbine 120, and the front support base 210 and the gas turbine 120 are fixed with bolts, the connecting shafts 330 on the left and right sides of the rear support 300 are fixed to the gas turbine 120, and the test is started. At the end of the test, the front support 200 and the rear support 300 are removed, and then the test is removed.

[0044] The vertical plate 230 is a flat strip structure. The vertical plate 230 can be freely extended and retracted in the Y-axis direction, which can offset the stress generated by the expansion and contraction of the gas turbine 120 along the Y-axis during the test. The ball head 331 forms a line contact with the lower bearing seat 320 and the upper bearing seat 340, so that the two rear supports 300 can only limit the displacement of the gas turbine 120 in the Y-axis and Z-axis directions. When the diameter of the gas turbine 120 is heated and expanded, the gas turbine 120 can be freely extended and retracted in the X-axis direction, avoiding the force generated by the gas generator when it is heated and expanded. When the gas generator is heated and expanded, the gas turbine 120 can be freely extended and retracted in the X-axis direction. When the flame is skewed, the gas turbine 120 can rotate relative to the device, and the unbalanced force exerted by the gas turbine 120 on the device will also be reduced. When the device expands due to heat, some stress can also be eliminated. The front support 200 and the rear support 300 work together to firmly support the gas turbine 120 and reduce or eliminate various stresses generated by the gas turbine 120 on the device during the test. The vertical uprights 311 and the inclined diagonal rods 312 can increase the strength of the device and ensure that the device can firmly support the gas turbine 120.

Claims

1. A gas turbine test chassis, characterized in that The invention comprises a frame (110), wherein the front end of the frame (110) is detachably connected to two symmetrically arranged front supports (200), the front support (200) comprises a front support base (210), and both sides of the front support base (210) are respectively connected to vertical plates (230) of a flat strip structure, the upper part of the vertical plates (230) is connected to a fixing frame (220), and the fixing frame (220) is fixedly connected to the gas turbine (120), and the rear end of the frame (110) is detachably connected to two symmetrically arranged rear supports (300), the rear support (300) comprises a rear support frame (310), the upper part of the rear support frame (310) is connected to a lower bearing seat (320), the upper part of the lower bearing seat (320) is connected to an upper bearing seat (340), a connecting shaft (330) is provided between the lower bearing seat (320) and the upper bearing seat (340), and the connecting shaft (330) is in line contact with the lower bearing seat (320) and the upper bearing seat (340).

2. A gas turbine test chassis according to claim 1, characterized in that The front support base (210) is a T-shaped structure, and the bottom of the front support base (210) is connected to the frame (110) through fasteners.

3. A gas turbine test chassis according to claim 1, characterized in that The vertical plates (230) are symmetrically arranged on both sides of the vertical plate of the front support base (210); the fixing frame support plate (223) at the lower part of the fixing frame (220) is clamped between the two vertical plates (230); two symmetrical clamping plates (240) are respectively provided on the upper and lower sides of the vertical plates (230); the front support base (210), the fixing frame (220), the vertical plates (230), and the clamping plates (240) are fixed together by fasteners.

4. A gas turbine test chassis according to claim 1, characterized in that The lower portion of the rear support frame (310) is provided with a vertical upright rod (311) and an inclined rod (312) in an inclined direction.

5. A gas turbine test chassis according to claim 4, characterized in that The bottoms of the vertical rod (311) and the diagonal rod (312) are connected to the frame (110) via fasteners.

6. A gas turbine test chassis according to claim 1, characterized in that The ball head (331) at one end of the connecting shaft (330) forms a line contact with the bearing seat formed by the lower bearing seat (320) and the upper bearing seat (340).

7. A gas turbine test chassis according to claim 1, characterized in that The connecting plate (332) on one side of the connecting shaft (330) and the gas turbine (120) are detachably connected.

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