Modular electrically driven compressor plant

FIELD: machine building.

SUBSTANCE: proposed plant comprises housing accommodating motor stator with multiphase winding, compressor compression radial-flow stage flow section fixed elements, housing cover accommodating stator elements of plant rotor magnetic suspension system bearings, and plant rotor carrying rotor elements of bearings and compressor and motor rotary assemblies. Note here that motor stator magnetic core is made up of sections, their number complying with that of compression stages. Magnetically and electrically not conducting separation cylinders are arranged between said sections. Note here that stator winding is shared by all sections and laid in core section and separation cylinder grooves. Every integrated rotary assembly of compressor and motor comprises impeller. Said impeller inlet has guide channels to feed gas to impeller inlet while motor rotor section is located there outside. Note also that magnetic coupling between motor and rotor sections is ensured by fixed cylinders made from electrically nonconducting materials with built-in cores made up of thin stacks of radial plates of electric steel.

EFFECT: decreased overall dimensions.

2 cl, 2 dwg

 

The invention relates to compressor technology and can be used as a unit for compression of various gases in many industries, such as gas-pumping unit at compressor stations.

Known compressor units, made in the form of multiple structures (compressor housings compression motors, multipliers), combined with different types of transmissions in a single compressor unit (see, for example, Snap V.B. have been Design and calculation of centrifugal compressors. - M.: Mechanical Engineering. 1995).

The disadvantages of the known units are:

- large metal units;

- the necessity of using a rotating seals;

- the need to ensure accurate alignment of the axes of the individual housings of the compressor, the motor, transmission and multipliers;

- the need to use aggregate measures of protection when compressed explosive gases because of the inevitable leakage of gas through the rotating seal;

- a large installation space for placing the component parts of the Assembly.

Known designs of compressor units in which the motor and compressor stage compression combined in a single structure, and the impellers of the centrifugal is tupana compression set console on the ends of the rotor of the electric motor on one or two sides. This arrangement of the compressor unit was named MOPICO (Motor Pipeline Compressor). In such compressor units, all rotating elements are in the same sealed enclosure, located in the environment of the process gas (see, for example, Mbrane, Icetomb. The use of active magnetic bearings in turbochargers and turbo-expanders gas industry. Compressors and Pneumatics. No. 7, 2001).

The drawbacks of such units are:

- ability to install a maximum of two compression stages of the centrifugal compressor;

the operation of the motor windings in the environment of the process gas, which can be aggressive and high blood pressure.

Also known centrifugal compressor unit having a motor, a compressor containing a driven shaft with a pre-installed system wheels with blades, the system formed by the engine and compressor, housed in an enclosure which is formed by the connection of its parts (see Patent RU 2333398 published 10.09.2008).

The disadvantages of this unit are:

- the presence of large dimensions;

- the big metal unit;

- a large installation space for placing the component parts of the Assembly.

An object of the invention is the creation of a technology in the manufacture and Assembly of modular con is e.g. compressor unit, combining in a single housing elements multistage centrifugal compressor and motor can be divided cavities of compressor and electrical windings of the stator of the motor.

The technical result of the invention is the reduction in weight and size characteristics, reducing the metal of the unit, improving the reliability of the compressor unit, the reduction of operating costs, reduction of quantities for maintenance and repair, reducing the number of controlled parameters.

The technical result of the invention is achieved due to the fact that the modular electrically-driven compressor includes a housing, which houses the stator of the motor with a multiphase winding, stationary items flowing parts of centrifugal compression stages of the compressor cover, which has a stator elements bearing system of the magnetic suspension of the rotor, and the rotor, the shaft of which is mounted a rotary elements of the bearing and rotor nodes centrifugal compressor and motor, the magnetic circuit of the stator of the motor is made in the form of sections, the number of which corresponds to the number of degrees of compression of the compressor, and between which there is amagnitude elektroprovodyashchie R is sdlaudio cylinders, moreover, the stator winding is common to all sections and laid in the grooves of the sections of the magnetic circuit and separating cylinders, each combined rotary component of a centrifugal compressor and an electric motor includes an impeller of a centrifugal compressor, inside the input part of which is formed by guide channels for gas flow at the impeller inlet, and outside there is a section of the rotor of the electric motor, and to provide magnetic coupling sections of the stator and rotor of the motor, the unit is equipped with spaced between the fixed cylinder made of elektroprovodyashchego material with embedded cores in the form of thin packages radially oriented electrical steel plates.

In addition, the section of the rotor of the motor is performed according to the type of rotor induction motor.

The invention is illustrated in the drawing, figure 1 of which shows the structure of a modular compressor unit with three compression stages; figure 2 shows a cross-section of the unit And in the plane of the section of the electric motor.

Modular electrically-driven compressor unit comprises a cylindrical housing 1, which is installed inside the stator of the motor, consisting of sections of the magnetic circuit 2, the number of which corresponds to the number of degrees of compression of the compressor, and set the between them separating emanicipated elektroprovoda cylinder 3, thus, the stator also has a General multiphase winding 4, which is laid in grooves (not shown) of the sections of the magnetic circuit 2 and the separating cylinder 3. To ensure magnetic coupling sections of the stator and the rotor 10 of the motor unit is equipped with a stationary conductive cylinders 5 which are coaxial with the core 2 between the sections of the stator and rotor 10. Each conductive cylinder 5 is made of non-ferromagnetic elektroprovodyashchego material, which is embedded in the magnetic circuit in the form of a thin packages of plates 18 electrical steel, radially oriented in the direction of the resultant magnetic field of the stator, and the plane of the plate packs 18 perpendicular to the direction of movement of the rotating magnetic field created multiphase winding 4 of the stator of the motor. Between the conductive cylinders 5 are in the form of sections of fixed elements 6 flow passages of centrifugal compression stages of the compressor diffuser, reverse guide system, circular camera). At the ends of the housing 1 is fixed to the cover 7, which has a stator elements 8 and 9 respectively radial and axial electromagnetic bearing system active magnetic bearings (SAMPA) of the rotor 10, and an auxiliary (backup) ball 11. On the shaft 16 of the rotor 10 is installed is as sections combined rotary nodes centrifugal compressor and motor, as well as rotary elements 12 and 13 respectively radial and axial electromagnetic supports the SUMP. United rotary hosts a centrifugal compressor and an electric motor includes an input part 14 of the impeller 15 of the centrifugal compressor (CC), the outside of which is a section of the rotor 10 of the electric motor, for example, the type of rotor induction motor, and the impeller 15 of the CC (figure 1). The input part 14 of the impeller 15 on the inner side is made with the guide channels 17 (2), in which the gas is fed to the inlet of the impeller 15 of the Central Committee.

The unit consider the example of execution of sections of the motor type asynchronous with the rotor winding in the form of a squirrel cage. The first phase switching unit is the inclusion of the SUMP, representing a five-channel system of automatic stabilization of the rotor 10 relative to the axis of the housing 1 of the machine. When turning on the SUMP activated radial bearings 8, 12 and axial bearing 9, 13, as a result of which the shaft 16 of the rotor 10 is stabilized relative to the axis of the housing 1 of the unit without mechanical contact with the fixed elements of the unit. In the second step of switching a multi-phase winding 4 of the stator of the motor is supplied from the frequency Converter or multiphase, for example, three-phase, AC power. Sectech of the magnetic core 2 of the stator produces a rotating magnetic field excitation, which at every moment of time is closed through a thin plate 18 electrical steel conductive cylinder 5 and the magnetic circuit of the rotor 10. As the magnetic field of the stator rotates, the clearance between the rotor 10 and the conductive cylinder 5 is formed also of a rotating magnetic field which induces in the winding rods of the rotor 10 electromotive force (EMF), causing the flow in the terminals of the winding of electric currents that interact with the rotating magnetic field, form the torque driving the rotor 10. Komprimierung gas flows from the suction side, passes through a section of a centrifugal compressor stages of compression and is delivered to the discharge side (the direction of gas flow shown by the arrows in figure 1 from left to right).

To reduce magnetic losses in the stator of the electric motor is provided for separating the cylinders 3, made of amagnitude elektroprovodyashchego material. With the purpose of saving of wrapping material by reducing the frontal parts of the multiphase winding 4 of the stator is made common to all sections of the motor. In the design of the unit provided the division with the gasket cavity, which are the windings of the motor, with the working cavity of the compressor. This feature is GNA for powerful units, using high-voltage winding and required the organization of system of cooling of the stator of the motor.

In the design of the unit can be applied to a motor of another type, for example, synchronous motor or brushless DC motor, and the design of the unit does not essentially change, and different options will only equipment motor controls.

Thus, thanks to the implementation of the stator of the electric motor in the form of sections corresponding to the number of compression stages of the compressor, separated by non-ferromagnetic elektroprovodyashchimi cylinders 3, total polyphase winding 4, the performance of the impeller 15 of the shaft 16 of the rotor 10 with the output part, inside of which is formed by the guide channels 18 for supplying gas to the inlet of the centrifugal wheel, and the outer part is a section of the rotor 10 of the electric motor, and the magnetic connection of the sections of the stator and the rotor 10 of the motor is carried out by introducing a fixed conductive cylinder 5 made of non-ferromagnetic elektroprovodyashchego material with embedded cores in the form of a thin packages of plates 18 electrical steel, received in a single housing 1 multistage compressor units, enough tech when izgotovlenie Assembly, to ensure the tightness of the working cavity of the compressor part of the unit and cavities, which are the windings of the motor.

1. Modular electrically-driven compressor unit, comprising a housing in which is installed the stator of the motor with a multiphase winding, stationary items flowing parts of centrifugal compression stages of the compressor cover, which has a stator elements bearing system of the magnetic suspension of the rotor, and the rotor, the shaft of which is mounted a rotary elements of the bearing and the rotary hosts a centrifugal compressor and an electric motor, characterized in that the magnetic circuit of the stator of the motor is made in the form of sections, the number of which corresponds to the number of degrees of compression of the compressor, and between which there is amagnitude elektroprovodyashchie separating cylinders, and the stator winding is common to all sections and laid in the grooves of the sections of the magnetic circuit and separating cylinders, each combined rotary component of a centrifugal compressor and an electric motor includes an impeller of a centrifugal compressor, inside the input part of which is formed by guide channels for gas flow at the impeller inlet, and outside there is a section of the rotor of the electric motor, and DL is providing magnetic coupling sections of the stator and rotor of the motor, the unit is equipped with spaced between the fixed cylinder, made of elektroprovodyashchego material with embedded cores in the form of thin packages radially oriented electrical steel plates.

2. The Assembly according to claim 1, characterized in that section of the rotor of the motor is performed according to the type of rotor induction motor.



 

Same patents:

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FIELD: electricity.

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7 cl, 10 dwg

FIELD: electricity.

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FIELD: electricity.

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2 cl, 2 dwg

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FIELD: electrical engineering.

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FIELD: electricity.

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2 cl, 3 dwg

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FIELD: electricity.

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2 cl, 3 dwg

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FIELD: electricity.

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7 dwg

FIELD: electricity.

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EFFECT: creation of inductor generator that has simple structure and able to generate electric energy in a form of one-phase or three-phase current with high coefficient of efficiency.

9 cl, 5 dwg

Electrical machine // 2454773

FIELD: electricity.

SUBSTANCE: electrical machine (8), first of all electrical engine, is designed for electrical control of vehicle structure parts position adjustment, namely as steering control servo drive. Electrical machine includes rotor (7) and shaft (10). Rotor (7) includes several plates (5) that are installed on the shaft separately or by preliminary assembled plate pack (6) or by several plate packs (6), note that the rotor (7) is connected to the shaft (10). The plates (5) have elastic projections (3) that serve for attachment of plates (5) or plate packs (6) to the shaft (10). Besides, the plates (5) of the pack (6) have centring projections (1) that serve for radial centring of plate pack (6) in relation to the shaft (10). The same method can be used for stator (15) attachment in the body part (16), note that centring projections (1) at the plates (5) of stator (15) plate pack (6) serve for centring of stator (15) plate pack (6) in relation to the shaft (10).

EFFECT: simplification of rotor mounting on the shaft and stator mounting in the body part of electrical machine and increase of its manufacturing effectiveness with the simultaneous provision of required radial centring of rotor plate pack and stator plate pack in relation to the shaft of electrical machine.

20 cl, 8 dwg

Electrical machine // 2454773

FIELD: electricity.

SUBSTANCE: electrical machine (8), first of all electrical engine, is designed for electrical control of vehicle structure parts position adjustment, namely as steering control servo drive. Electrical machine includes rotor (7) and shaft (10). Rotor (7) includes several plates (5) that are installed on the shaft separately or by preliminary assembled plate pack (6) or by several plate packs (6), note that the rotor (7) is connected to the shaft (10). The plates (5) have elastic projections (3) that serve for attachment of plates (5) or plate packs (6) to the shaft (10). Besides, the plates (5) of the pack (6) have centring projections (1) that serve for radial centring of plate pack (6) in relation to the shaft (10). The same method can be used for stator (15) attachment in the body part (16), note that centring projections (1) at the plates (5) of stator (15) plate pack (6) serve for centring of stator (15) plate pack (6) in relation to the shaft (10).

EFFECT: simplification of rotor mounting on the shaft and stator mounting in the body part of electrical machine and increase of its manufacturing effectiveness with the simultaneous provision of required radial centring of rotor plate pack and stator plate pack in relation to the shaft of electrical machine.

20 cl, 8 dwg

FIELD: electric engineering.

SUBSTANCE: invention relates to electric engineering and may be used in drive units of hair cutting machines. The actuating motor (1) contains U-shaped stator (100) with the first shelf (110) and second shelf (120) and, at least, one additional shelf (130) located between the first (110) and second (120) shape and armature. At least, one induction coil (140) is placed on the above mentioned, at least, one additional shelf (130). There are side sections (A, B) of the air gap between the first and second shelves (110, 120) and armature (150). The middle sections (a, b) of air gap are available between the additional shelf (130) and armature (150), which implemented to be tilted as the side sections (A, B) of air gap with regard to the longitudinal axis (L). The first spout (112) is provided for and located on one side of the first shelf (110) and faced from additional shelf, and a cut (122) made on the second shelf (120), denoting additional shelf (130) and to the first spout in response (122).

EFFECT: increased power and saving of copper and electrical steel.

17 cl, 5 dwg

FIELD: electric engineering.

SUBSTANCE: invention relates to electric engineering, namely, to electric machines, and may be used in industrial mechanisms requiring speed control. The technical result is achieved though the control circuit of single-phase valve electric drive, which includes transistor bridge switch with one of its diagonal being meant for connecting to winding, while the other diagonal of switch bridge being linked with a power source. The control inputs of switch are coupled with control element, which operates by algorithms ensuring its operation under pulse-duration modulation. At the same time, according to the invention, the control element contains micro controller with drive, connection points with transistor switch diagonal and with two microcontroller inputs through voltage stabiliser. The third microcontroller input is connected to control electrodes of transistor switch through the driver so that the diagonals are connected in turn to power supply poles.

EFFECT: increased efficiency of single-phase valve electric drive due to generation of maximum operating torque and start torque as well as current shape close to sinusoid, improved motor performance and simplified control of valve electric drive with reduced overall dimensions.

4 cl, 3 dwg, 1 tbl

FIELD: machine building.

SUBSTANCE: turbo-machine rotor comprises a shell whose end faces are rigidly attached to end caps fitted with pins resting on bearings, while the shell outer surface is fitted with means of securing the blades different by the fact the coaxial shaft and the shell are rigidly fastened together by at least two jumpers equidistant from each another and made in the form of plates of uniform thickness whose length corresponds to the length of the shell and which are directed along the longitudinal axis of the turbo-machine rotor while thickness of the jumpers gradually increases towards the surfaces being in contact with the shaft and the shell at the junctions with them. In this case the shaft is made hollow and the jumpers are oriented radially. In addition, areas of conjugation of the jumpers with the shaft and the shell are given a rounded shape of the surface. At the same time the means of securing the blades on the rotor are made in the form of a fish-bone lock. In addition, cross-section of the shell along its longitudinal axis is variable. In this case end caps are additionally fastened rigidly to the jumpers.

EFFECT: increase in the permissible peripheral velocity, axial and radial stiffness of the rotor, ensuring minimal weight and mass moments of inertia.

7 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: turbo-machine rotor comprises a shell whose end faces are rigidly attached to end caps fitted with pins resting on bearings, while the shell outer surface is fitted with means of securing the blades different by the fact the coaxial shaft and the shell are rigidly fastened together by at least two jumpers equidistant from each another and made in the form of plates of uniform thickness whose length corresponds to the length of the shell and which are directed along the longitudinal axis of the turbo-machine rotor while thickness of the jumpers gradually increases towards the surfaces being in contact with the shaft and the shell at the junctions with them. In this case the shaft is made hollow and the jumpers are oriented radially. In addition, areas of conjugation of the jumpers with the shaft and the shell are given a rounded shape of the surface. At the same time the means of securing the blades on the rotor are made in the form of a fish-bone lock. In addition, cross-section of the shell along its longitudinal axis is variable. In this case end caps are additionally fastened rigidly to the jumpers.

EFFECT: increase in the permissible peripheral velocity, axial and radial stiffness of the rotor, ensuring minimal weight and mass moments of inertia.

7 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: rotor assembly features surface heat emission exceeding 1 W/cm2. Note here that air or inert gas is cooled to -260°C - 40°C at, at least, 2 bar to create test atmosphere for rotor to be operated therein. In compliance with one version, cryogenic fluid is brought to selected temperature and pressure to create testing atmosphere. Note here that temperature varies from -260°C to 40°C at, at least, 2 bar to create test atmosphere for rotor to be operated therein.

EFFECT: operation in corrosive media.

4 cl, 5 dwg

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