RU2383754C1 - Gas compressor plant turbo unit - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: invention relates to machine building and can be used in production of gas turbine drives of gas compressor plants. Proposed turbo unit comprises drive engine with engine mount frame and supercharger arranged on common frame support surfaces. Supercharger shaft is rigidly and directly coupled with drive engine free turbine shaft. Free turbine shaft thrust bearing seat accommodates single thrust bearing for engine free turbine and supercharger shafts. Engine free turbine exhaust scroll is rigidly coupled with supercharger housing. Single bearing housing is furnished with heat insulator casing.

EFFECT: higher reliability, improved operating performances, lower production costs.

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Description

The invention relates to the field of mechanical engineering and can be used to create gas pumping units (GPU) with a gas turbine drive.

The turboblock is the basic assembly unit of the GPU, around which the remaining nodes (blocks) and structural elements are assembled.

A known design of a GPU turbo-block, which includes a drive engine with an under-engine frame and a supercharger mounted on a common frame on supporting surfaces. The torque from the shaft of the free turbine of the drive motor to the rotor of the supercharger is transmitted using a tansmission consisting of couplings of a free turbine and a supercharger and an intermediate shaft (see the book by A.I. Apanasenko et al. Installation, testing and operation of gas pumping units in a block-container version. - L .: Nedra, 1991, p. 19-23).

The structural layout of this turbo block has become classic, but its in-depth analysis has revealed a number of significant drawbacks associated with the presence of a transmission in it. These include:

- Increasing the dimensions (length) of the turboblock and, accordingly, the dimensions of the installation site;

- The need for balancing the elements of the transmission, which is technologically complex and time-consuming operation;

- The need for autonomous oil supply for bearings of a free turbine and supercharger;

- Relatively high transmission costs due to the use of high-strength steels and manufacturing technology requiring high-precision equipment.

Obviously, these shortcomings reduce the technical and operational characteristics of the turbo block, and taking into account the manufacture and installation of the transmission, they significantly increase the cost of development.

An object of the present invention is to remedy these drawbacks.

The technical result is achieved in that in a turbo block of a gas pumping unit containing a drive engine with a sub-motor frame mounted on a common frame on supporting surfaces, the compressor shaft is directly and rigidly connected to the shaft of the free turbine of the drive engine, while in the place of the thrust bearing for the shaft of the free turbine of the engine a single support bearing is installed for the shafts of the free turbine of the engine and the supercharger, the exhaust coil of the free turbine of the engine is rigidly fixed to the supercharger housing And a single bearing housing is provided with a thermal jacket.

All features of the invention are essential:

- The direct connection of the shafts of the supercharger and the free turbine eliminates the transmission from the design of the turboblock;

- A rigid connection of the shafts of the supercharger and the free turbine can significantly simplify the balancing of the shafts and ensure high reliability of the kinematic chain;

- The installation of a single support bearing for the shafts of a free turbine and a supercharger can reduce the number of support bearings on the shafting and use one oil system for a free turbine and a supercharger;

- The connection of the exhaust coil of the free turbine with the blower housing eliminates the need for additional equipment to mount it;

- The use of a heat-shielding casing for a single bearing eliminates the heating of the bearing from the exhaust coil of a free turbine located next to it.

The invention is illustrated in the drawing, which shows a longitudinal section of the design of the turboblock, which indicates: 1 - a supercharger, 2 - a free turbine of a drive engine, 3 - a supercharger shaft, 4 - a free turbine shaft, 5 - an exhaust coil of a free turbine, 6 - a supercharger body, 7 - a single bearing for the shafts of a free turbine and a supercharger, 8 - a heat-shielding casing of a single bearing, 9 - a joint unit for the shafts of a free turbine and a supercharger, made in the form of a gear clutch.

During operation of the turboblock, the torque from the shaft of the free turbine 4 is transmitted through the gear coupling to the shaft of the supercharger 3. Heat flows from the wall of the exhaust coil are taken over by the heat-shielding casing 8, providing the design mode of operation of a single bearing 7.

The invention allows a free turbine and a supercharger to be combined into one assembly unit, which makes it possible in the factory to carry out prototyping of the assembly, center the shafts, transport it as a unit and install it in the unit without additional operations.

In general, the use of this technical solution will improve the reliability of the system, dramatically improve the technical and operational characteristics of the turbo block, and reduce the cost of its production.

Claims (1)

Turbo-block of a gas-pumping unit, comprising a drive engine with an under-engine frame and a supercharger mounted on a common frame on the supporting surfaces, characterized in that the supercharger shaft is directly and rigidly connected to the shaft of the free turbine of the drive engine, while in the location of the support bearing for the shaft of the free turbine of the engine a single support bearing is installed for the shafts of the free turbine of the engine and the supercharger, the exhaust snail of the free turbine of the engine is rigidly fixed to the pump housing I, as a single bearing housing is provided with a thermal jacket.

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