CN202578805U - Turbine sealing structure of turbine generator - Google Patents

Abstract

The utility model discloses a turbine sealing structure of a turbine generator. The turbine sealing structure comprises a generator shell (1) and a turbine cover shell (2), wherein a transmission shaft (3) penetrating into the generator shell (1) is arranged in the generator shell (1); a turbine (4) connected with one end of the transmission shaft (3) is arranged in the turbine cover shell (2); and a labyrinth sealing mechanism (5) is arranged on the transmission shaft (3). The turbine sealing structure is characterized in that a gas guide pipeline (6) is arranged outside the turbine generator; and one end of the gas guide pipeline (6) is communicated with the labyrinth sealing mechanism (5), and the other end of the gas guide pipeline (6) is communicated with a turbine outlet of an inner cavity of the turbine cover shell (2). The turbine sealing structure has the advantages of simplicity and convenience in manufacturing and assembly; by the turbine sealing structure, the turbine can be sealed reliably, and the cost is low; furthermore, gas leaked during labyrinth sealing can be guided to the turbine outlet; and loss of working medium gas can be prevented.

Description

Turbine sealing structure of a turbogenerator

technical field

The utility model relates to a turbine generator, in particular to a turbine generator sealing structure.

Background technique

At present, the turbine in the turbogenerator, as a high-density power component, has become the core component of many industrial products, especially in terms of energy saving and emission reduction, the turbine is more and more widely used as a tool for reusing residual energy. However, since the inlet of the turbine is generally high temperature and high pressure, the sealing of the turbine has always been a difficult problem. In order to prevent the leakage of the working fluid gas, the sealing is often achieved by installing piston ring oil seals and labyrinth seals on the rotating shaft. However, such The sealing effect is not ideal. In order to solve this problem, many manufacturers have designed extremely complicated multiple seals or used a large number of auxiliary equipment for sealing. Although it is feasible, such a seal will not only increase the The manufacturing cost is increased, and the service life is short, and at the same time, the sealing effect is still unsatisfactory.

Utility model content

The purpose of the utility model is to provide a turbine generator turbine sealing structure with reliable sealing and simple structure.

The purpose of this utility model is achieved through such a technical solution, a turbine generator turbine sealing structure, including a generator casing and a turbine casing, a transmission shaft penetrating through the generator casing is arranged in the generator casing, and A turbine connected to one end of the transmission shaft is arranged inside the turbine housing, a labyrinth sealing mechanism is arranged on the transmission shaft, and an air-inducing pipeline is arranged outside the turbine generator. One end of the air-inducing pipeline communicates with the labyrinth sealing mechanism, and the other end It communicates with the turbine outlet of the inner cavity of the casing.

In order to separate lubricating oil and working gas, an oil-gas separator is installed on the bleed air pipeline.

In order to ensure normal operation, there are two oil and gas separators, which are arranged side by side on the bleed air pipeline.

In order to facilitate online replacement of the oil-gas separator, manual valves are respectively arranged at both ends of the oil-gas separator.

Due to the adoption of the above technical solution, the utility model has the advantages of simple structure and convenient manufacture and installation. It not only makes the turbine seal more reliable, but also has low cost. At the same time, the gas leaked from the labyrinth seal is led back to the turbine outlet, preventing Loss of working gas.

Description of drawings

The accompanying drawings of the utility model are as follows:

Fig. 1 is the structural representation of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the specific embodiment of the utility model is described in further detail, but the utility model is not limited to these implementation modes, and any improvement or substitution on the basic spirit of this embodiment still belongs to the claims of the utility model Scope of protection claimed.

Embodiment 1: As shown in Fig. 1, a turbine generator turbine seal structure includes a generator casing 1 and a turbine casing 2, and a transmission shaft 3 penetrating through the generator casing 1 is arranged in the generator casing 1 , the turbine casing 2 is provided with a turbine 4 connected to one end of the transmission shaft 3, a labyrinth sealing mechanism 5 is provided on the transmission shaft 3, and an air induction pipeline 6 is arranged outside the turbine generator. One end communicates with the labyrinth sealing mechanism 5 , and the other end communicates with the turbine outlet of the inner chamber of the turbine housing 2 .

In the utility model, the working medium gas drives the turbine to rotate, and the high pressure of the working medium gas at the inlet of the turbine causes the working medium gas to enter the labyrinth sealing mechanism 5. It leads to the outlet of the turbine to realize the self-sealing of the turbine. In the utility model, in order to prevent the working fluid gas from leaking into the bearing, a piston ring oil seal 9 is provided on the rotating shaft 3, and the lubricating oil supply pressure is slightly greater than the outlet pressure of the turbine.

In order to separate the lubricating oil sucked into the bleed air pipe from the working gas and prevent the lubricating oil from entering the turbine, an oil-gas separator 7 is provided on the bleed air pipeline 6 .

Wherein, there are two oil-gas separators 7, which are arranged side by side on the bleed air pipeline 6. This is to ensure the normal operation of the structure. When one oil-gas separator is damaged, the other oil-gas separator can still work as usual.

Of course, in order to replace the damaged oil-gas separator online, manual valves 8 are respectively provided at both ends of the oil-gas separator 7 .

Claims (4)

1. A turbo-generator turbine sealing structure, including a generator casing (1) and a turbine casing (2), and a transmission shaft ( 3), a turbine (4) connected to one end of the transmission shaft (3) is arranged in the turbine casing (2), and a labyrinth sealing mechanism (5) is arranged on the transmission shaft (3), the characteristic is: the turbine generates electricity A bleed air pipeline (6) is arranged outside the machine, one end of the bleed air pipeline (6) communicates with the labyrinth sealing mechanism (5), and the other end communicates with the turbine outlet of the inner chamber of the turbine casing (2). 2. The turbine sealing structure of the turbogenerator according to claim 1, characterized in that: an oil-air separator (7) is arranged on the bleed air pipeline (6). 3. The turbine sealing structure of the turbogenerator according to claim 2, characterized in that: there are two oil-air separators (7), which are arranged side by side on the bleed air pipeline (6). 4. The turbine sealing structure of the turbogenerator according to claim 2 or 3, characterized in that: manual valves (8) are respectively provided at both ends of the oil-gas separator (7).

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