RU187972U1 - GAS TURBINE INPUT - Google Patents

Abstract

The utility model relates to the intake path of gas turbine engines and can be used for all types of gas turbines (GT). The technical result, which consists in increasing the efficiency of the GT, is achieved by reducing the coefficient of hydraulic resistance of the air-tight tube and the redistribution of air flows in the inlet section of the compressor GT.

Description

The utility model relates to the field of energy, namely, to the air intake path (VZT) of gas turbine engines (GTE) and can be used for all types of gas turbines (GT).

GTE used as a drive for power and power plants require a large amount of air for their work. After cleaning in an air-cleaning unit (HEU), air through an inlet device enters the GT compressor.

VZT is a multifunctional device consisting of a HEU, a noise suppression unit and air ducts. In this case, the distribution of incoming air parameters (speed, static pressure) over the inlet section of the gas turbine engine must be uniform. At the same time, these parameters directly depend on the geometric parameters of the VZT and the input device (BU). The presence of a complex VU is a consequence of the fact that when moving along the VZT, the air flow is unevenly distributed over the channel section; The task of averaging the air parameters at the inlet to the compressor of the GT is solved by the developed utility model.

For less resistance to VZT it is necessary:

- Avoid excessive length of VZT;

- minimize the number of turns;

- avoid reducing the cross section along the VZT;

- if possible, eliminate protruding segments of the skin or parts of the equipment protruding inward;

- avoid the presence of "sharp" edges and faces.

The implementation of these requirements in the general case ensures the stable operation of the gas turbine engine in the given parameters, which ensures maximum efficiency of equipment use, an increase in the operating life, and an increase in the operating time before going to repair. At the same time, the housing itself must have sufficient strength, wear resistance and adaptability during installation. Since the GT during operation is a noise source in a wide range of frequencies, the WU enclosure must effectively absorb it.

In the proposed utility model, the housing is made of a composite based on fiberglass and a polymer binder (hereinafter referred to as Fiberglass). This material has several advantages:

- the product can be performed in any shape, which in the case of a metal version requires sophisticated and expensive equipment;

- products have less weight with equal strength compared to the metal traditionally used for such structures;

The remaining qualities of fiberglass meet the operating conditions of the VU and the requirements for power plants.

The current model was developed as a modernization of the VZT GTE-110 installed at the facility of JSC Inter RAO-Electric Power Plants to replace the existing WU. The introduction of a utility model allowed us to significantly reduce losses in the VZT of the power plant, to improve the distribution of parameters in the inlet section of the gas turbine compressor.

In similar gas turbines of firms Siemens, General Electric, etc. VZT is used with a minimum length and, in most cases, without turns. The proposed WU form is designed for a VZT with an uneven distribution of flow parameters over the cross section. Technological solutions used in the model allow you to effectively deal with such irregularities, and the design involves setting up the elements responsible for the redistribution of the flow and selecting the best option for a particular object.

The WU form is the development of the recommended form for the inlet nozzles of turbomachines in // Aerodynamic calculation of boiler plants (normative method). Ed. S.I. Mochana. Ed. 3rd L., "Energy", 1977 //. The final geometry and arrangement of internal elements worked out in the course of experimental research. The design and materials used make it possible to modernize, make changes to the design, adapt the product to the conditions at the facility and customer requirements.

The toroidal shape of the back of the VU can significantly reduce stagnant zones and streamline air flows. The dividing rib is installed so that the amount of passing air from top to bottom is balanced. The proposed model has a smoothed central ring shape to optimize air entry into the compressor. In this case, the shape of the central ring, the position of the dividing rib can be changed to meet the relevant requirements of the customer and the conditions of the object. The shape of the transition element of the VU can also be changed to match the section of the VZT in front of the VU.

A general view of the proposed WU is presented in a graphic image. For clarity, the wall adjacent directly to the heat and noise cover of the turbine is not shown. In addition, the outer surface, which is a continuous sealed fiberglass wall, is not shown. On the graphic image, you can also notice the holes made in the inner wall of the VU (its transitional part). These holes are measures to improve the noise absorption properties of the WU.

Conventionally, the VU can be divided into the Confusor part (2) adjacent to the pre-installed noise attenuation block of the existing VZT, the Transition part (1), from which the air enters the GTE-110 Compressor and the Separation rib (3). Directly pairing the WU with the compressor is carried out using rubber diaphragms through the Central ring (4).

Claims (1)

The input device of the gas turbine, comprising a housing having a confuser and toroidal part, and a rib separating the air flows before entering the compressor, while the housing of the input device is made of a composite based on fiberglass and a polymer binder.

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