Self-contained gas-transfer energy complex of gas mains

FIELD: natural gas transportation mains.

SUBSTANCE: invention relates to gas-transfer energy complexes used for increasing pressure of natural gas transported along gas mains. Novelty in proposed self-contained gas-transfer energy complex of gas mains including at least one compressor station with at least one centrifugal gas charger driven by electric motor is that proposed complex contains power plant consisting of at least power turbine unit including turbine and multiple turbogenerator (with two or more pairs of poles) with common shaftline installed on magnetic supports. Leads of turbogenerator stator winding are electrically connected directly with ins of electric motor stator winding, and electric motor with gas charger have common shaftline installed on magnetic supports. Rated speed of shaftline is set equal to rated speed of gas charger, and rated output voltage frequency of turbogenerator ftg is equal to nch · pm/60 where nch is speed of shaftline of electric motor and charger, pm is number of pairs of electric motor poles, and number of pairs of poles ptg of turbogenerator is 60, ftg/ntg where ntg is speed of shaftline of turbine and turbogenerator. Proposed invention provides self-contained operation of complex with remote control. Groups of turbine-generator and charger and drive are simplified in design, power loses for production and transmission of energy and electric drive are brought to minimum.

EFFECT: increased efficiency as compared with known systems.

7 cl

 

The invention relates to pumping energy complexes, which are used to increase the pressure of natural gas during its transportation through trunk pipelines.

For pipelines with large bandwidth as pumping units are widely used centrifugal blowers, drive for which are high-speed turbines, such as gas, as well as asynchronous and synchronous motors. Advantages of the electric drive are ease of installation and maintenance, high reliability and service life, compact size, and a smaller proportion compared with other types. Analysis of gas-compressor units (Apatow, Usemenu “Some results of the work of compressor stations of main gas pipelines”, CRI gas industry, Moscow, 1965, p.28) shows that one of the most important factors reliable operation of compressor stations (CS) is the uninterrupted supply of electric energy. Because of the cessation and neconditionate parameters power supply occurred 30% of all forced stops electrically driven COP during the study period. The disadvantage of the existing gas compressor units is the availability of the system mesoamericana, which is a special service.

Known (prototype) pumping energy complex of the main pipeline containing a compressor station, including centrifugal blowers driven by synchronous motors connected to the power source - the power system. (Compressor station gas turbine drive. Sfermion and others, “Nedra, Leningrad branch, Leningrad, 1968, p.22.

This solution has several disadvantages.

The most significant of these is the need for power from the grid, which is unacceptable for CS trunk pipelines, remotely located from the existing electrical networks. When this material are also losses in transmission.

For the motor used in the prototype is rated shaft speed of 3000 revolutions per minute, while the nominal speed of the supercharger is the frequency of rotation of the shaft, close to 6,000 revolutions per minute (can vary within 5300-7800). For frequency conversion motor shaft rotation frequency of the rotating shaft of the supercharger requires such expensive and bulky equipment as the multiplier to the related system is alonebyte.

For the implementation of technical solutions for prototype also need the lubrication of plain bearings with the oil supply system.

The oil supply system is very costly and in addition require constant special service.

The claimed technical solution solves the problem of creating an Autonomous pumping energy complex with the opportunity to work with a remote control that does not require permanent dedicated service independent from the external power supply system and at the same time having a higher efficiency in General.

The problem is solved in that in the Autonomous pumping energy complex of the main pipeline, having in its structure at least one compressor station, including at least one centrifugal blower gas powered motor, what's new is that the complex further comprises a power plant, consisting of at least one power turbine unit containing the turbine and multi-pole (with two pairs of poles or larger) turbo-generator having a common propeller shaft mounted on the magnetic poles, the stator winding outputs of the turbo-generator is electrically connected directly to the inputs of the stator winding of the electric is dvigatelya, and the electric motor with a supercharger gas have a common propeller shaft mounted on magnetic bearings, nominal speed which is set equal to the nominal rotational speed of the compressor of the gas, and the nominal frequency of the output voltage of the turbogenerator fTgequal to nNan·pEDV/60, where nNan- frequency of rotation of a shaft of the motor and compressor, REDVthe number of pairs of poles of the motor, and the number of pairs of poles pTgthe turbine generator is 60 fTg/nTgwhere nTg- frequency of rotation of a shaft of the turbine and turbine generator.

To obtain the output voltage on the windings of the stator of a turbo-generator with a frequency of 100 Hz at a frequency of rotation of a shaft of the turbine and turbine generator 3000 rpm turbine generator performs four.

The drive motor can be made asynchronous. Start asynchronous motor can be made from the thyristor starter, for which the input stator winding induction motor associated with the release of these devices.

To ensure the reliability of energy supply complex is composed of at least one backup power turbine Assembly.

To power the device for their own needs electric station may contain on one the m shaft with multi-pole turbine generator auxiliary two-pole turbo generator with frequency output power 50 Hz.

The claimed technical solution due to the presence of the power station achieved the independence of the power complex of electricity from the grid.

Parameters output voltage of the power plants are not standard, they are determined from the condition for the optimal operation mode of the gas blowers. For this purpose, the frequency of the output voltage of the turbogenerator fTgdetermined from the condition fTg=nNan·pEDV/60, where nNan- frequency of rotation of a shaft of the motor and compressor, REDVthe number of pairs of poles of the motor, and from the condition RTg=60fTg/nTgwhere nTg- frequency of rotation of a shaft of the turbine and turbo-generator, determine the number of pairs of poles pTgturbine generator.

In nominal mode, the speed of rotation of the shaft of the generator is equal to the rotation speed of high-speed turbine, which is rated to 3000 revolutions per minute. When performing turbo-generator according to the claimed technical solution four on the findings of a stator winding of a turbo-generator receives a voltage with a frequency of about 100 Hz, which through switchgear and reactors using current-carrying elements and switching equipment without frequency conversion serves on the inputs of the stator winding driving asynchronous engine in the La supercharger.

Four execution stator leads to a significant reduction of the mass of the core and the stator winding, and the vibration of the core under the action of a rotating magnetic field in the air gap. For example, the mass of the core chetyrehrazovoe turbine generator below 30 t than bipolar. Low vibration core allows not to use elastic suspension of its housing, which significantly simplifies the design and manufacture of turbine-generator. Four performance rotor eliminates raznostnoi body of the rotor with respect to the transverse axis and thereby eliminates the vibration of the rotor with dual frequency (100 Hz).

To ensure nominal operation mode of the gas blowers, the known technical solutions applied or frequency converters voltage or multipliers for frequency conversion motor shaft rotation frequency of the rotating shaft of the supercharger.

In contrast to the known technical solutions, in which the power supply voltage with a standard industrial frequency of 50 Hz is served on the inverter, and then to the motor winding, the claimed technical solution on the findings of a stator winding of a turbo-generator receives a voltage of the order of 100 Hz, which without frequency conversion is fed to the motor winding.

In Appl the reception technical solution, the connection shaft of the turbine and turbine generator direct drive, and the shafts of the compressor and drive motor without multiplier, allowing the turbine Assembly is simplified by the equipment. A significant factor is that the work gear and the multiplier is impossible without a system of oil supply. Thus, we have obtained the opportunity to opt-out system of oil supply required for operation and multiplier.

In addition, shafting mounted on magnetic bearings.

Known technical solutions, such as “Magnetic bearing” on the patent of the Russian Federation 2115835, “Magnetic bearing unit according to the patent of the Russian Federation 2129228, which indicated that the noncontact support device (magnetic bearing) can be used to create cars with active suspension of rotors, including pumping units, consisting of a drive motor and driven machine. In contrast to the known technical solutions, where only part of the equipment or one unit was mounted on magnetic bearings, in this technical solution, all the main equipment centre, such as power plants, and gas-pumping unit electric motor driven blower gas, mounted on magnetic bearings. This is a significant circumstance to achieve the result, as it gives you the option to unsubscribe from the oil system the lubrication of the bearings, when the availability is almost impossible to create standalone complex with remote control.

The proposed scheme of power asynchronous motors with frequency of 100 Hz minimises losses in nominal and close to the nominal operation modes of the compressor of the gas. Using an adjustable guide vanes of the compressor of the supercharger, you can modify its power without a noticeable decrease in efficiency in the range of rated power up to 70% of rated power. In this load range, the motor receives power directly from the bus power and operates at a constant frequency power of 100 Hz. The frequency Converter in this mode is not used. The start of the compressor, continuous operation even at minimum speed and a smooth transition in the power mode of the engine from the network 100 Hz (reverse transition) ensures that the frequency Converter. Power frequency Converter half the power of the motor, which gives the opportunity to apply mastered and cheaper equipment. The frequency Converter is used to soft start the motor and to switch to more economical operation of the compressor. Losses in the frequency Converter during the start of the complex have little effect on the overall energy balance.

Thus, thanks to all the essential features you cannot get a new result - Autonomous energiebespa the group the possibility of complex operation with a remote control, and group equipment turbine - generator and the blower drive is simplified in structure, and loss of power production, power transmission, and the drive is minimized, which allows to achieve higher compared with the known solutions of efficiency.

Autonomous gas-pumping and energy complex of the main pipeline may be implemented as follows. For example, for chetyrehletnego the main pipeline Autonomous pumping energy complex, designed for a capacity of about 400 MW, contains 4 compressor stations with a nominal capacity of 96 MW each with centrifugal blowers gas with a nominal capacity of 16 MW, and the power plant includes 4 power turbine unit with a nominal capacity of 130 MW each, one of which is in nominal mode is in reserve. Electric station is placed in close proximity to compressor stations, either in the same building that provides a minimum power losses and high reliability of their power supply. As the turbine can be used in steam, steam or gas turbine, turbo-generator - synchronous electric machine with 4-pole of the second rotor.

In the initial period of operation for start-up power equipment complex, you can use diesel generator set (power source on the basis of a diesel engine and alternator).

In a particular embodiment, use as a blower can be used centrifugal compressor GC-340/60-85M (rated - power of 16 MW, the shaft rotation speed 6000 rpm), and the drive motor is a bipolar high-speed induction motor, designed to operate pumps, compressors, gas compressors, blowers and other high-speed machines.

In addition to consumers, operating at a frequency of 50 Hz from the auxiliary generators may be able to supply consumers at a frequency of 100 Hz, for example devices of electric heating equipment and premises, lighting, rectifier units. For consumers, operating at a frequency voltage 50 Hz, on the same shaft with the main four-pole turbine generators can be located two-pole turbogenerator own needs limited power output voltage frequency of 50 Hz.

Declare Autonomous pumping energy complex differs from existing ones in that it has Autonomous energaia the biscuits, his energy is excluded high-voltage lines and power transformers are excluded system mesoamericana that require special regular maintenance. Thanks to the proposed structure of the complex reached the remote control of the system while simplifying the structure and systems of work equipment. This loss of power production, power transmission, and the drive of the compressor is minimized, which allows to obtain a higher efficiency in General.

1. Autonomous gas-pumping and energy complex of the main pipeline, having in its structure at least one compressor station, including at least one centrifugal blower gas powered motor, wherein the complex further comprises a power plant, consisting of at least one power turbine unit containing the turbine and multi-pole turbogenerator having a common propeller shaft mounted on the magnetic poles, the stator winding outputs of the turbo-generator is electrically connected directly to the inputs of the stator winding of the electric motor and the electric motor with a supercharger gas have a common propeller shaft mounted on magnetic bearings, rated speed which is definitely what Lena is equal to the nominal the rotational speed of the compressor of the gas, and the nominal frequency of the output voltage of the turbogenerator fTg= nNan·pEDV/60, where nNan- frequency of rotation of a shaft of the motor and compressor, REDVthe number of pairs of poles of the motor, and the number of pairs of poles of the turbogenerator pTg= 60 fTg/nTgwhere nTg- frequency of rotation of a shaft of the turbine and turbine generator.

2. Autonomous pumping energy complex according to claim 1, characterized in that the turbine generator made four.

3. Autonomous pumping energy complex according to claim 1, characterized in that the electric motor is executed asynchronously.

4. Autonomous pumping energy complex according to claim 2, characterized in that the electric motor is executed asynchronously.

5. Autonomous pumping energy complex according to claim 3, characterized in that the input stator winding induction motor is connected with the output of the thyristor trigger.

6. Autonomous pumping energy complex according to claim 4, characterized in that the input stator winding induction motor is connected with the output of the thyristor trigger.

7. Autonomous pumping energy complex according to any one of claims 1 to 6, characterized in that the electrical station contains nomnom shaft with multi-pole turbine generator auxiliary two-pole turbogenerator.



 

Same patents:

The fan // 2241860
The invention relates to ventilyatorostroeniya and can be used as part of systems management products aviation and rocketry

The fan // 2194883

The invention relates to ventilation systems cooling (CO) power plants with open air tract, a feature of which is the lack of conditions for the axisymmetric flow of air entering the impeller ventilation unit (WU) and sufficient power pack offices (MTO) to build a full-profile devices release air to the atmosphere

Axial fan // 2184274
The invention relates to electrical engineering and ventilyatorostroeniya, namely the production of axial fans and fan installations, in which the motor and the fan are combined in a single unit with the formation of the combined unit is called an electric fan

The invention relates to ventilator settings variable performance and provides reliable and rigid positioning of the blades of the impeller, ease of adjustment, the possibility of local, remote and automatic control of the position of the blades by changing the angle of inclination when the fan stops or during rotation

Fan // 2176332
The invention relates to a fan used to circulate air in the refrigeration compartment of the refrigerator, and ensures safe operation and reduce the cost of installation

Duplicate fan // 2174195
The invention relates to ventilyatorostroeniya and can be used in the composition of thermal control systems upper stages by reducing the axial size and weight and simplify the design

The fan // 2170856
The invention relates to ventilyatorostroeniya and can be used as part of systems management products aviation and rocketry

Wave fan // 2161271
The invention relates to the field of Aerohydrodynamics, namely the fans

Duplicate fan // 2150031
The invention relates to ventilyatorostroeniya and can be used in the composition of thermal control systems

FIELD: natural gas transportation mains.

SUBSTANCE: invention relates to gas-transfer energy complexes used for increasing pressure of natural gas transported along gas mains. Novelty in proposed self-contained gas-transfer energy complex of gas mains including at least one compressor station with at least one centrifugal gas charger driven by electric motor is that proposed complex contains power plant consisting of at least power turbine unit including turbine and multiple turbogenerator (with two or more pairs of poles) with common shaftline installed on magnetic supports. Leads of turbogenerator stator winding are electrically connected directly with ins of electric motor stator winding, and electric motor with gas charger have common shaftline installed on magnetic supports. Rated speed of shaftline is set equal to rated speed of gas charger, and rated output voltage frequency of turbogenerator ftg is equal to nch · pm/60 where nch is speed of shaftline of electric motor and charger, pm is number of pairs of electric motor poles, and number of pairs of poles ptg of turbogenerator is 60, ftg/ntg where ntg is speed of shaftline of turbine and turbogenerator. Proposed invention provides self-contained operation of complex with remote control. Groups of turbine-generator and charger and drive are simplified in design, power loses for production and transmission of energy and electric drive are brought to minimum.

EFFECT: increased efficiency as compared with known systems.

7 cl

FIELD: in-flow ventilating systems.

SUBSTANCE: ventilating system includes ventilating unit 1, radiator unit 2, filtering unit 3 and distributing unit 4. Unit 1 includes main and reserve radial fans 6, 7 having inlet manifolds 8, impellers 9 with main and covering discs 11, 12, radial blades 10 and converging gap between manifold 8 and disc 12. Fans 6, 7 are separated by partition 17 in housing 16 for forming vortex cavities between manifold 8 and disc 12 and ducts 19. Vortex suppressing plates are mounted in said cavities. Surface area of cross sections of ducts 19. Surface area and diameter of impeller 9, distance between one wall 18 and blades 10 are mutually related by predetermined relations. When flow is directed to duct 19 of fans 6 or 7 by means of flaps 25 arranged in unit 4 or valves, it is possibly to perform maintenance of system without interrupting its operation.

EFFECT: reduced size, improved comfort of maintenance of system.

17 cl, 13 dwg

FIELD: non-positive-displacement pumps.

SUBSTANCE: centrifugal compressing device comprises engine (50) that set rotor (52) in rotation and at least one compressor that has housing of the stator and a set of wheels provided with blades (56) mounted on the driven shaft that is set in rotation inside the housing of the stator. The motor is mounted in pressure-tight crank case (86). The compressing device additionally has a set of active guiding axial and radial bearings (60), (62), (64), (66), and (67) of the rotor and driven shaft and means for cooling engine and guiding bearings by means of sucking gas supplied by the compressor at the outlet of the first compression stage. The cooling means have a set of inner pipelines (80-1), (80-2), (80-3), (80-4), (80-5) and (80-6) that supply cooling gas to the engine and bearings. The flow rate of the cooling gas supplied to the engine differs from that of the cooling gas supplied to the bearings and flow together upstream of the first compression stage .

EFFECT: enhanced reliability.

Fan unit // 2355916

FIELD: ventilation.

SUBSTANCE: invention relates to fan engineering and can be used as a component of space technology temperature control systems. The technical result is achieved by a fan unit comprising a casing including a cylindrical boring and two flanges with axial holes, two bushes are coaxial to the casing and connected to it by piers; an electric motor is set in each bush and its shaft is equipped by an impeller set inside the cylindrical boring. The casing consists of two parts; the first flange is fitted at the end face of the first casing part and the second one - of the second casing part. A bush with piers is placed in each casing part; the first flange is fitted with threaded holes; the flanges are contacting with each other and interconnected by screws screwed into the threaded holes and passing through the axial holes of the second flange with the screw heads being placed on the second flange side; the outer surface of the first casing part is cylindrical along the section from its free end face to the first flange and the first flange axial holes are projecting beyond the second flange outline.

EFFECT: ensuring repairability and increasing variety of the fan unit assembly patterns.

1 dwg

FIELD: electric engineering.

SUBSTANCE: invention relates to electric engineering, namely - to electric machines, and deals with the specific features of fixing elements design for electric motors, particularly, fan sets intended for heating, ventilation and/or air-conditioning plants. This invention proposes a device (40) for fixing electric motor (16) containing accommodating seat (41) for motor installation with a wall (42). According to the invention, the device (40) for fixing electric motor (16) implemented so that the first (18A) and second (18B) air pumping element can be rotated. The air pumping element includes accommodating seat (41) to install electric motor (16) and a wall (42). Besides, the obstructing elements (60, 62; 72, 74, 76; 80) are placed between the electric motor (16) and accommodating seat (41) wall (42). The obstructing elements are implemented so that they can obstruct air flowing between electric motor (16) and wall (42) of accommodating seat and air flow be redirected through electric motor (16).

EFFECT: improved cooling of electric motor and ensured control of different heating, ventilation and/or air conditioning equipment parameters.

21 cl, 9 dwg

Compression unit // 2455530

FIELD: machine building.

SUBSTANCE: compressor unit (1) comprises a compressor (5), a suction line (2) and a return line (3), a block (20) that controls the compressor (5). Moreover, in line (2) the suction is ensured by at least one device (21, 22) to detect amounts of non-gaseous fluid medium in the fluid to be compressed, on their way to the entrance to compressor (5), and detection device (21, 22) is connected to management block (20) ensuring signal transmission, and compressor unit (1) contains dissolution unit (30), which dissolves the amount of non-gas on its way to the entrance of compressor (5), while the dissolution is initiated when the amount of detected non-gaseous fluid exceeds a certain limit.

EFFECT: any damage caused by a number of non-gaseous fluid into the suction inlet to the compressor is excluded.

7 cl, 1 dwg

Fan // 2458254

FIELD: ventilation.

SUBSTANCE: vaneless fan 100 for creation of the air flow includes nozzle 1 installed on the housing of base 16 for creation of the air flow passing through it. Nozzle 1 has internal channel 10 for receiving the air from base 16 and outlet hole 12 through which the air flow is discharged. Nozzle 1 is essentially located orthogonally to the axis and forms hole 2 through which the air is injected from outer side of fan 100 due to the air flow leaving the outlet hole 12. Both nozzle 1 and base 16 have the depth in the direction of axis; at that, depth of base 16 does not exceed double depth of nozzle 1. As an alternative, fan 100 has the height measured from the end of base 16, which is the most distant from nozzle 1, to the end of nozzle 1, which is the most distant from base 16, and width which is perpendicular to the height. At that, both the height and the width are perpendicular to the axis, and width of base 16 does not exceed 75% of nozzle 1 width.

EFFECT: fan has compact design.

25 cl, 5 dwg

Fan // 2458255

FIELD: ventilation.

SUBSTANCE: vaneless fan includes nozzle 1 and device for creation of flow through it. Nozzle 1 has internal channel 10, outlet hole 12 for receiving the air flow from internal channel 10 and Koand surface 14 adjacent to outlet hole 12. The latter is located so that the air flow can be directed along that surface. Device for creation of the air flow through nozzle 1 is made in the form of impeller 30 brought into action with electric motor 22.

EFFECT: creation of more uniform air flow along the whole working surface of fan; more compact and safe design.

18 cl, 5 dwg

Blower assembly // 2460904

FIELD: engines and pumps.

SUBSTANCE: blower assembly 10 is designed to create air jet. Blower comprises outlet 14 arranged on bed. Said bed comprises outer housing 16 and case 64 of impeller 52 arranged in outer housing 16. Case 64 has air inlet 70 and air outlet and houses impeller 53 and its drive motor 56 to force airflow through case 64. Aforesaid outlet has inner chamber 86 to direct airflow from impeller case 64 and constricted section 26 for airflow to be forced out from blower 10. Flexible sealing element is arranged between outer housing 16 and case 64 of impeller 52.

EFFECT: reduced air loss and noise, increased airflow.

19 cl, 17 dwg

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

Up!