A seal structure for a straight duct section of a gas turbine inlet passage

Abstract

This utility model belongs to the field of gas turbine technology, and specifically relates to a sealing structure for a straight section of a gas turbine inlet. This sealing structure includes an inlet, characterized in that: a movable pipe fitting is installed in the inlet, and an elastic washer is provided on the inner side of the movable pipe fitting. Elongated grooves are respectively formed at both ends of the elastic washer, and the elastic washer is fitted into the groove of the fixed pipe fitting. The beneficial effect of this utility model is that when the gas turbine unit generates forward expansion during operation, the movable pipe fitting moves forward close to the elastic washer, absorbing this forward expansion and ensuring the safe and stable operation of the unit.

Description

Technical Field

[0001] This utility model belongs to the field of gas turbine technology, and specifically relates to a sealing structure for a straight pipe section of a gas turbine intake. Background Technology

[0002] A gas turbine is a rotary power machine that uses a continuously flowing gas as its working fluid to drive a high-speed rotating impeller, converting thermal energy into mechanical energy. During operation, a gas turbine generates forward expansion. Over long periods of operation, this expansion can cause stress concentration, leading to component damage. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides a sealing structure for the straight pipe section of a gas turbine intake.

[0004] This utility model is achieved through the following technical solution: A sealing structure for a straight section of a gas turbine inlet duct includes an inlet duct, characterized in that: a movable pipe fitting is installed in the inlet duct, an elastic washer is provided on the inner side of the movable pipe fitting, and long grooves are respectively opened at both ends of the elastic washer, and the elastic washer is fitted into the groove of the fixed pipe fitting.

[0005] The fixed pipe fitting has several measuring ports.

[0006] The movable pipe fitting has an integral flange at its end.

[0007] The beneficial effects of this utility model are: when the gas turbine unit generates forward expansion during operation, the moving pipe moves forward in close contact with the elastic washer, which can absorb this forward expansion and ensure that the unit can operate safely and stably. Attached Figure Description

[0008] The present invention will be further described below with reference to the accompanying drawings.

[0009] Appendix Figure 1 This is a schematic diagram of the structure of this utility model; Appendix Figure 2 This is a schematic diagram of the elastic washer structure of this utility model; In the diagram, 1 is the air intake, 2 is the movable pipe, 3 is the elastic gasket, 4 is the long groove, 5 is the fixed pipe, 6 is the groove, 7 is the measuring port, and 8 is the flange. Detailed Implementation

[0010] The attached figure shows a specific embodiment of this utility model. The connection method of this embodiment is as follows: a movable pipe 2 is installed in the air intake duct 1, and an elastic washer 3 is provided on the inner side of the movable pipe 2. The elastic washer 3 has long grooves 4 at both ends. The elastic washer 3 is fitted into the groove 6 of the fixed pipe 5. Several measuring ports 7 are provided on the fixed pipe 5. A flange 8 is integrally connected to the end of the movable pipe 2.

[0011] This invention employs a gas turbine inlet straight pipe section sealing structure, designing three components in the straight section of inlet 1 to absorb the forward expansion generated during gas turbine operation. A movable pipe fitting 2 connects to the compressor front casing. An elastic washer 3 seals the movable pipe fitting 2 and a fixed pipe fitting 5 to prevent air leakage. The fixed pipe fitting 5 connects to the flared end of inlet 1 and has a groove 6 for fixing the elastic washer 3. The fixed pipe fitting 5 has multiple measuring ports 7 for measuring engine intake flow rate, pressure, etc. Before use, the elastic washer 3 needs to be compressed to its minimum diameter and fixed before assembling with the movable pipe fitting 2. After assembly, the fixing device for securing the elastic washer 3 is removed. The elastic washer 3 expands and adheres tightly to the movable pipe fitting 2. During operation, the forward expansion of the gas turbine is transferred to the movable pipe fitting 2, which then moves forward against the elastic washer 3 to absorb the forward expansion. By absorbing the forward expansion generated during unit operation, the safe and stable operation of the unit can be ensured.

Claims

1. A sealing structure for a straight section of a gas turbine inlet duct, comprising an inlet duct (1), characterized in that: The air intake (1) is equipped with a movable pipe (2), and an elastic washer (3) is provided on the inner side of the movable pipe (2). Long grooves (4) are opened at both ends of the elastic washer (3), and the elastic washer (3) is fitted into the groove (6) of the fixed pipe (5).

2. The sealing structure for the straight section of the gas turbine inlet duct according to claim 1, characterized in that: The fixed pipe fitting (5) has several measuring ports (7).

3. The sealing structure for the straight section of the gas turbine inlet duct according to claim 1, characterized in that: The movable pipe fitting (2) has a flange (8) integrally connected to its end.

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