CN213088117U - Embedded motor suitable for small-size turbine engine - Google Patents

Abstract

The utility model discloses an embedded motor suitable for small-size turbine engine, its characterized in that: the motor is installed inside the engine and comprises motor rotor magnetic steel, the engine comprises a plurality of gas compressors and an engine main shaft which are coaxially installed, the gas compressors and the motor rotor magnetic steel sleeves are arranged on the engine main shaft, and the motor rotor magnetic steel is located among the gas compressors. The utility model provides an embedded motor design suitable for small-size turbine engine has solved among the prior art motor power density low, and the generated power is little, weight, bulky and the better problem of cooling effect.

Description

Embedded motor suitable for small-size turbine engine

Technical Field

The utility model belongs to the technical field of gas turbine device, especially, relate to an embedded motor suitable for small-size turbine engine.

Background

The turbine engine distributed power generation system is a new research hotspot in recent years, has the characteristics of small volume, light weight, high efficiency, cleanness, reliability and the like, is widely applied to power devices, auxiliary power systems and the like of various aircrafts and vehicles, and has wide military and civil prospects. With the continuous progress of power electronic technology, the power consumption of airborne equipment of various aircrafts is also rapidly improved, and on the premise of keeping the size of the original engine unchanged basically, higher requirements are provided for the power generation capacity of the engine.

For a small turbine engine, the rotating speed of the main shaft of the engine is greatly higher than that of a large turbine engine, and the high rotating speed can obviously improve the power density of a generator, so that the influence of additional mass brought by a high-power motor on the whole engine is reduced. The generator is arranged in the turbine engine, so that the original vacant space can be fully utilized, and meanwhile, the generator is fully cooled by means of airflow generated during operation.

Application No.: 2018216163750, publication date: 2019.08.09, entitled "Integrated centrifugal compressor", discloses that the air intake enters from the side, but is spaced from the motor so that the motor cannot cool it by means of the intake air; application No.: 2008200508767, publication date: 2009.4.15, the patent name "thermal power generation core machine", structurally speaking they belong to the ground combustion engine, the air inlet and exhaust structure is the volute structure that the ground combustion engine will use, the structure weight is very big, the motor and the engine are two independent components.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art not enough, provide one kind and utilize the original inner space of engine, will start the generator and imbed the inside to the engine, realize motor and engine with the rotational speed operation to improve the power density of generator, reduce the required volume of motor, simultaneously, inside the generator was introduced to the high velocity draught that produces when moving the engine, carried out abundant refrigerated embedded motor that is applicable to small-size turbine engine to the generator.

In order to solve the technical problem, the technical scheme of the utility model is that: the utility model provides an embedded motor suitable for small-size turbine engine, includes motor and engine, and the motor is installed inside the engine, the motor includes electric motor rotor magnet steel, the engine includes a plurality of compressors of coaxial arrangement and engine main shaft, and a plurality of compressors and electric motor rotor magnetic steel bushing establish on the engine main shaft, and electric motor rotor magnet steel is located between a plurality of compressors.

Preferably, the motor further comprises a motor stator winding;

the engine also comprises a compressor casing, a compressor casing strut and a compressor impeller which are coaxially arranged;

the motor stator winding is sleeved on the outer side of the motor rotor magnetic steel and both the motor stator winding and the motor rotor magnetic steel are installed in the compressor casing, an airflow channel is formed between the motor stator winding and the compressor casing, the compressor casing pillar is installed at the bottom of the compressor casing, a cavity communicated with the interior of the compressor casing is formed in the compressor casing pillar, the compressor impeller is sleeved on the motor rotor magnetic steel, and the compressor impeller is located in the compressor casing.

Preferably, the compressor is a centrifugal compressor or an axial compressor.

Preferably, the motor is a permanent magnet direct current motor.

Compared with the prior art, the utility model has the advantages of:

(1) the utility model discloses utilize the original inner space of engine, imbed the motor to the inside of engine, its rotor magnet steel is directly installed on the main shaft of engine, realizes that motor and engine operate with the rotational speed, and the motor is for starting, the integrated design of electricity generation, and two kinds of modes all operate under the engine speed, do not need the speed change gear, and the maximum power position of electricity generation mode is under the engine design point rotational speed, and the rotational speed is the highest this moment, and power density is far higher than conventional power generation facility;

(2) the motor of the utility model is arranged at the inner side of the airflow channel of the engine, and can fully utilize the air which is generated by the compressor and flows at high speed to cool;

(3) the utility model discloses electric motor rotor and engine rotor formula structure as an organic whole, make full use of engine inner space, compact structure, it is small.

Drawings

Fig. 1 is a schematic view of a cross-sectional structure of an embedded motor suitable for a small turbine engine according to the present invention;

description of reference numerals:

1. the motor rotor magnetic steel 2, the compressor 3, the engine spindle 4, the motor stator winding 5, the compressor casing 6, the compressor casing strut 7, the compressor impeller 8 and the airflow channel.

Detailed Description

The following description of the embodiments of the present invention is provided in connection with the following embodiments:

it should be noted that the structures, ratios, sizes, etc. illustrated in the present specification are only used to cooperate with the contents disclosed in the specification for the understanding and reading of the people skilled in the art, and are not used to limit the limit conditions that the present invention can be implemented, and any modifications of the structures, changes of the ratio relationships or adjustments of the sizes should still fall within the scope that the technical contents disclosed in the present invention can cover without affecting the functions and the achievable purposes of the present invention.

Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

As shown in fig. 1, the embedded motor suitable for the small-sized turbine engine comprises a motor and an engine, wherein the motor is installed inside the engine, the motor comprises motor rotor magnetic steel 1, the engine comprises a plurality of gas compressors 2 and an engine spindle 3 which are coaxially installed, the plurality of gas compressors 2 are sleeved on the engine spindle 3, the motor rotor magnetic steel 1 is installed among the plurality of gas compressors 2, and one side of the motor rotor magnetic steel 1 is coaxially installed on the engine spindle 3. The motor rotor and the engine rotor are of an integrated structure, and means such as gears and the like for transmitting torque are not needed; and the motor is embedded in the engine and is coaxially installed with the rotor.

The electric machine can also be designed to be used only as a starter or only as a generator, depending on the actual requirements.

Specifically, the motor further comprises a motor stator winding 4;

the engine also comprises a compressor casing 5, a compressor casing strut 6 and a compressor impeller 7 which are coaxially arranged;

the motor stator winding 4 is sleeved on the outer side of the motor rotor magnetic steel 1 and both are installed in the compressor casing 5, an airflow channel 8 is formed between the motor stator winding 4 and the compressor casing 5, the compressor casing pillar 6 is installed at the bottom of the compressor casing 5, a cavity communicated with the inside of the compressor casing 5 is formed in the compressor casing pillar 6, and the compressor impeller 7 is sleeved on one side of the motor rotor magnetic steel 1. The motor is embedded in the engine, and the air inlet flow can be fully utilized for cooling.

The angle formed by the compressor casing 5 and the airflow channel 8 is not fixed, and the airflow channel 8 does not need to axially intake and exhaust air along the engine, and can also intake air and axially exhaust air along the diameter direction of the engine; or axial air inlet and radial air outlet; or radial air inlet and radial air outlet; the angle formed by the air inlet angle and the air outlet angle and the axis of the engine; the cooling effect can be generated by the contraction, expansion or circumferential airflow channels;

the number of the compressor casing struts 6 and the angle formed by the airflow channel 8 are not fixed, and the blocking effect on the airflow channel 8 can be avoided by adjusting the area of the airflow channel 8, namely adjusting the volume of the airflow channel.

The motor rotor magnetic steel 1 is directly arranged on a main shaft 3 of an engine, a corresponding motor stator winding 4 is arranged in a compressor casing 5, and a cable of the winding penetrates out of the engine through a compressor casing pillar 6; the compressor impeller 7, the motor stator winding 4, the motor rotor magnetic steel 1 and the compressor casing 5 are jointly installed to form a compressor unit body, and the compressor impeller 7 is located on one side of the compressor.

Specifically, the compressor 2 is a centrifugal compressor or an axial compressor. The installation position of the motor is not limited to the middle of the axial flow compressor and the centrifugal compressor, and the motor can also be installed in the middle of a plurality of axial flow compressors or a plurality of centrifugal compressors according to the requirement.

Specifically, the motor is a permanent magnet direct current motor.

The working principle of the utility model is as follows:

as shown in figure 1 of the drawings, in which,

1) and mounting the motor stator winding 4 on the compressor casing 5 to complete the assembly of the compressor stator component.

2) Sleeving the compressor 2 into the engine spindle 3, mounting the motor rotor magnetic steel 1 on the engine spindle 3 from the front part, and mounting the other part of the compressor casing 5 outside the compressor 2 from the front part to complete the assembly of the compressor part;

3) sleeving the compressor stator component mentioned in the step 1) on the motor rotor magnetic steel 1 from the front part, and sleeving the compressor impeller 7 on the motor rotor magnetic steel 1 from the front part to complete the whole assembly.

4) The airflow channel 8 is positioned outside the motor stator winding 4, the compressor casing support 6 penetrates through the airflow channel 8, and airflow generated when the engine works is utilized to cool the motor stator winding 4 and the axial flow compressor casing 5.

Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, and that the scope of the invention is defined by the appended claims.

Claims (4)

1. An in-line electric machine adapted for use in a small turbine engine, comprising: the motor is installed inside the engine and comprises motor rotor magnetic steel, the engine comprises a plurality of gas compressors and an engine main shaft which are coaxially installed, the gas compressors and the motor rotor magnetic steel sleeves are arranged on the engine main shaft, and the motor rotor magnetic steel is located among the gas compressors.

2. The in-line electric machine for a small turbine engine according to claim 1, wherein: the motor further comprises a motor stator winding;

the engine also comprises a compressor casing, a compressor casing strut and a compressor impeller which are coaxially arranged;

the motor stator winding is sleeved on the outer side of the motor rotor magnetic steel and both the motor stator winding and the motor rotor magnetic steel are installed in the compressor casing, an airflow channel is formed between the motor stator winding and the compressor casing, the compressor casing pillar is installed at the bottom of the compressor casing, a cavity communicated with the interior of the compressor casing is formed in the compressor casing pillar, the compressor impeller is sleeved on the motor rotor magnetic steel, and the compressor impeller is located in the compressor casing.

3. The in-line electric machine for a small turbine engine according to claim 1, wherein: the compressor is a centrifugal compressor or an axial-flow compressor.

4. The in-line electric machine for a small turbine engine according to claim 1, wherein: the motor is a permanent magnet direct current motor.

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