FIELD: transport engineering.
SUBSTANCE: invention relates to low-capacity turbocompressors-gas-expansion machines for transfer of hot contaminated gas-air mixture and for cooling air in vehicle air conditioning and air cooling system. proposed turbocompressor-gas-expansion machine has housing accommodating shaft installed inside housing on antifriction bearings with fitted on wheels of compressor and turbine-gas-expansion machine secured on ends of shaft. Bearings are grease packed. Bearing unit from side of compressor is installed with clearance relative to housing. clearance is divided by partition made of heat-insulating material into two spaces. Space from side of bearing unit communicates with atmosphere and with outlet of turbine-gas-expansion machine for cooling bearing by part of cooled air flow. Space from side of compressor is sealed to play part of heat shield.
EFFECT: simplified design, reduced overall dimensions of turbocompressor-gas-expansion machine, provision of normal temperature conditions for operation of bearing.
3 cl, 1 dwg
The present invention relates to refrigeration, and in particular to the turbo-expanders low productivity for pumping hot contaminated gas mixture and cooling air conditioning system and air cleaning of the vehicle.
Known Turkologist containing the oil pan and installed the shaft bearings located on it impellers of the turbine and compressor, made in the bearing housing longitudinal channels for the cooling air and the inlet of the turbine with nozzle device [USSR Author's certificate No. 172952, CL F04D 29/58, 1964].
The disadvantage of turboalternator is that the temperature of the cooling air during operation increases as part of the cooling air circulates in a closed circuit, which reduces the efficiency of cooling the bearing housing.
As a prototype selected turbofan, containing the oil pan and installed the shaft bearings located on it impellers of the turbine and fan, made in the bearing housing longitudinal channels for cooling air, and the sump is located in the inlet pipe of the turbine having an eccentric annular channel for supplying air to Solovay apparatus turbines [Author svidetel is in the USSR # 172952, CL F04D 29/58, 1964].
A disadvantage of the known device is the design complexity and large size due to the presence of complex and bulky oil pan, and the inability to use the turbo fan for pumping hot contaminated gas mixture and cooling air conditioning system and air cleaning of the vehicle because of the possibility of getting contaminated gas mixture and drops of oil in the highway clean cooled air.
The task to be solved by the invention is the simplification and reduction of the dimensions of the design of the turbo-expander by using compact high-speed bearings with grease and ensure the normal temperature operating conditions of bearings.
The problem is solved in that the turbo-expander, mainly for pumping hot contaminated gas mixture and cooling air conditioning system and air cleaning vehicle, comprising a housing installed inside on ball bearings shaft attached to the ends of the impellers of the compressor and the turbine-expander according to the invention, the bearings are constructed with grease, bearing unit with the parties of the compressor is installed with a clearance relative to the housing, the gap is divided by a partition of insulating material into two cavities, the cavity side of the bearing unit in communication with the atmosphere and with the outlet of the turbine-expander with cooling of the bearing part of the stream of cooled air, and the cavity side of the compressor is airtight with the ability to perform the functions of a heat shield.
To improve cooling of the bearings on the end face of the bearing unit side walls made ribbing.
For enhanced cooling by creating turbulence in the air flow fins made in the form of concentric annular projections.
Comparative analysis of the proposed turbo-expander with prototype and other solutions in this field of technology shows that set forth in patent formula, the set of features not known from the existing art, on the basis of what can be concluded about its compliance with the criteria of the invention of "novelty."
When this is set out in the formula of the set of features not obvious to a person skilled from the current level of technology that allows to make a conclusion on the conformity of the decision criterion of the invention "inventive step".
Compliance with the proposed solution the criteria of the invention "industrial applicability" seen from below is shown the specific example of the turbo-expander.
The invention is illustrated by the drawing, which schematically represented in the turbo-expander in the section.
The list of symbols on the drawing:
1 - body;
2 - bearing;
3 - shaft;
4 - the impeller of the compressor;
5 - impeller turbine-expander;
6 - compressor;
7 - turbine-expander;
8 - bearing unit;
9 - wall;
10, 11 - cavity;
12 - channel.
The turbo-expander includes a housing 1 mounted inside the bearing 2 shaft 3 attached to the ends of the impellers 4, 5 compressor 6 and the turbine-expander 7, respectively. The bearing 2 is made with grease and mounted in a bearing unit 8. Bearing unit 8 from the compressor 6 is installed with a clearance relative to the housing 1. When this gap is divided by a partition 9 of insulation material on the two cavities 10 and 11. The cavity 10 from the side of the bearing unit 8 communicates with the atmosphere and with the outlet of the turbine-expander 7 and the cooling of the bearings 2 part of the stream of cooled air. The cavity 11 from the compressor 6 are sealed with the ability to perform the functions of a heat shield. For the passage of air into the cavity 10 in the node 8 is made channels 12.
The operation of the turbo-expander is as follows.
Work the net who is uh, passing through the turbine-expander 7, rotates the impeller 5 and is cooled. Through the shaft 3, the rotation of the wheel 5 is transmitted to the impeller 4 of the compressor 6, engaged in pumping hot and contaminated air / gas mixture. Part of the flow of cooled air (about 10%) from the outlet of the turbine-expander 7 is fed into the cavity 10, cools the bearings 2 and prevents the ingress of possible leaks of contaminated gas mixture through the bearing unit 8 turbine-expander 7 (highway clean air). The presence between the bearing unit 8 and the compressor 6 of the partition 9 and the air cavity 11 provides thermal insulation of the bearing unit 8 on the hot side of the compressor 6.
The use of the invention can significantly improve the physical characteristics of the turbo-expander and to simplify its design. The presence of insulation and air cooling of the bearing unit provides the right conditions for long-term operation of rolling bearings with grease.
1. The turbo-expander, mainly for pumping hot contaminated gas mixture and cooling air conditioning system and air cleaning vehicle, comprising a housing installed inside on ball bearings shaft attached to the ends number of workers who themselves compressor and turbine-expander, characterized in that the bearings are constructed with grease, bearings on the compressor side is installed with a clearance relative to the housing, the gap is divided by a partition of insulating material into two cavities, the cavity side of the bearing unit in communication with the atmosphere and with the outlet of the turbine-expander for cooling of the bearing part of the stream of cooled air, and the cavity side of the compressor is airtight with the ability to perform the functions of a heat shield.
2. The turbo-expander according to claim 1, characterized in that the end face of the bearing unit side walls made ribbing.
3. The turbo-expander according to claim 2, characterized in that the fins are made in the form of concentric annular projections.
FIELD: power engineering, possible use in devices for using cold of natural gas at outlet of cryogenic gas expansion machine for ecologically safe cooling of air in chambers of refrigerator.
SUBSTANCE: method for utilization of cold, generated during expansion of natural gas in at least one cryogenic gas expansion machine with diversion of mechanical energy includes letting cold gas prior to feeding to consumer through at least one heat exchanger with cooling in this heat exchanger of intermediate fire and explosion safe liquid coolant. Heat exchanger is made with direct contact of substances. Cooling of air in cooling chamber is performed by letting cold liquid coolant through heat exchanger of refrigerator, which is returned to heat exchanger for cooling by natural gas. Draining of liquid coolant is compensated by natural gas by means of feeding liquid coolant into its circulation contour when level of liquid coolant decreases in heat exchanger. System for utilization of cold, generated during expansion of natural gas with diversion of mechanical energy contains at least one cryogenic gas expansion machine with device for receipt of mechanical energy, connected to source of high pressure natural gas, heat exchanger for cooling of liquid coolant, at least one chamber of refrigerator with heat exchanger and accumulating vessel for liquid coolant with device for controlling level of liquid coolant, connected to pipeline, connecting outlet for liquid coolant of heat exchanger for cooling of liquid coolant to at least one heat exchanger of refrigerator chamber. Vessel is made with possible connection to liquid coolant storage and through valve for discharging gas - to atmosphere when a signal is received by valve from device for controlling level of liquid coolant.
EFFECT: improved efficiency, increased ecological safety and explosion safety of cold utilization.
2 cl, 3 dwg
FIELD: refrigeration equipment, particularly used to utilize secondary energy and natural source energy having low potential, namely for combined heat and cold production.
SUBSTANCE: refrigeration plant comprises body, turbine, compressor, supply pump, evaporative and condensation chambers and capillary system for working liquid throttling. The body is separated into power and cooling sections by solid partition. Evaporative, working and condensation chambers are created in the power section. Inside surfaces of side evaporative chamber walls and partition are covered with wick. Inner surface of end wall is provided with grooves and covered with thin porous material layer. Shaft extends through body walls, power and cooling sections, solid partition and wick layers. Feed pump rotor is put on shaft end so that the pump is communicated with working liquid reservoir. Arranged in cooling sections are low-temperature evaporative chamber and compressive condensation chamber communicated by compressor to which vapor flow is fed. Compressor rotor is put on shaft.
EFFECT: increased performance.
FIELD: power engineering; power generating installations.
SUBSTANCE: the invention is pertaining to the field of power engineering, in particular, to the power generating installations utilizing the energy of the overpressure of the rock gas with realization of the gas-turbine-expansion effect. The gas-turbine-expansion installation for utilization of the compressed rock gas energy contains in series mounted on the high-pressure rock gas mains: the electric heater for preheating of the gas; the turbo-expander kinematically linked with the electric power generator; the power storage battery with a capability of its recharge from the electric generator at the turbo-expander operation in the recharge mode and at connection to the heater in the initial moment of the installation operation with the subsequent switching-off from the heater at the turbo-expander reaching its operational mode. The electrical heater is the resistive heater and connected to the electric power generator through the control unit, which is electrically connected to the temperature sensing devices mounted on the inlet and the outlet of the turbo-expander. Utilization of the invention ensures simplification of the design chart of the power gas-turbine-expansion installation and the capability to regulate the preset temperatures of the gas at the inlet and the outlet of the turbo-expander.
EFFECT: the invention ensures simplification of the design chart of the power gas-turbine-expansion installation and the capability to regulate the preset temperatures of the gas at the inlet and the outlet of the turbo-expander.
2 cl, 2 dwg
FIELD: pipeline systems for gas distribution, particularly with the use of excessive gas pressure reduced in gas-distribution stations and adapted to obtain electric energy, cold and ice without fuel combustion.
SUBSTANCE: method involves using gas cooled by expanding thereof in expander without external work performing as cooling agent to cool air in refrigerator compartments and in ice generator. Part of cold gas passes in ice generator heat-exchanger connected to energy-cooling plant outlet or to collector linked with outlet of each energy-cooling plant to obtain consumer-demanded gas temperature at ice generator outlet. System for above method implementation includes gas refrigerator with compartments and heat-exchangers arranged in each compartment. The heat-exchangers are connected one to another in series. Outlet of above heat-exchangers is connected to pipeline which conveys gas to consumer. The system is provided with at least one ice generator having heat-exchanger linked to outlet of corresponding energy-cooling plant or with collector connected to outlet of each energy-cooling plant and with pipeline adapted to convey gas to consumer. Energy-cooling plant has turboexpander and electric generator, energy drive with impeller machine, gas refrigerator and ice generator used in the system.
EFFECT: increased efficiency of gas cold usage and environmental safety.
31 cl, 5 dwg
FIELD: cooling and heating equipment; devices used for cooling and heating atmospheric air fed to domestic or industrial rooms.
SUBSTANCE: proposed cooling turbine includes casing, centrifugal multi-stage compressor, multi-stage peripheral-admission turbine whose blades are located between cover shields provided with circular projections over periphery and cover disks. Centrifugal compressor is provided with straightening apparatus at its inlet which has spiral blades with intake holes over periphery of rotor. Multi-stage peripheral-admission turbine is provided with outlet apparatus at its inlet which has spiral blades with outlet holes over periphery of rotor; rotor is mounted on revolving shaft. Working blades are secured on cover shields of rotor. Located in initial row of immovable disks as far as middle one are immovable straightening apparatus with spiral blades of diffuser which are located on fixed axle inside rotor. Located in subsequent row of immovable disks, after middle one, are immovable nozzle sets provided with spiral blades of contraction and secured on fixed axle inside rotor. Middle dividing disk is non-rotating and is rigidly secured on the same axle inside rotor. Rotating blades located on opposite sides of dividing disk are also secured on cover shields of rotor. Fixed axle has hole for passage of additional cooler or heater. On side of drive unit, end tenon of rotor is located between two bearings.
EFFECT: enhanced efficiency under any climatic conditions.
FIELD: cooling equipment, particularly refrigerators including turbo-expanders operating within wide range of cooling temperatures.
SUBSTANCE: turborefrigeration plant comprises turbo-expander, multi-compartment dynamic heat-exchanger, user of refrigeration, power source and centrifugal turbocompressor. Centrifugal turbocompressor is divided into low-pressure and high-pressure centrifugal stages. Low-pressure stage is mechanically linked with power source. High-pressure stage is mechanically connected to turboexpander. The first heat-exchanger compartment inlet communicates with outlet of user of refrigeration through channel, outlet thereof communicates with atmosphere. The second heat-exchanger compartment inlet is connected to low-pressure turbocompressor stage outlet and outlet thereof is linked with high-pressure turbocompressor stage inlet. The third heat-exchanger compartment inlet is connected to high-pressure turbocompressor stage outlet, outlet thereof is linked with turbo-expander inlet.
EFFECT: increased refrigeration performance, increased reliability of plant actuation and operation, simplified structure, increased operational economy.
FIELD: device adapted to reduce pressure in main gas pipeline, particularly for excessive gas energy utilization.
SUBSTANCE: used as electric machine is multipolar induction motor operating in generator mode and performing recovery of energy into supply main. Turbine, electric machine and velocity pickup are arranged in sealed chamber including bushing insulators connected with electric machine and velocity pickup from one side and with supply main through commutator from another side.
EFFECT: increased reliability and energy data.
FIELD: wave expander-compressors, possibly used in compression systems and plants with expansion machines.
SUBSTANCE: expander-compressor includes housing in which rotor is mounted on shaft. Rotor has energy-exchange ducts communicated at rotor rotation with branch pipes for supplying and discharging gas through gas supply nozzles and diffusers for discharging gas in respective gas distributing devices. Housing is in the form of stator having electric winding. Rotor having energy-exchange ducts is provided with short-circuit winding whose rods are arranged between outer surface of rotor and its energy-exchange ducts.
EFFECT: simplified design of wave type expander-compressor.
FIELD: refrigerating engineering.
SUBSTANCE: proposed method includes setting the turbine outlet temperature and continuous measurement of pressure and temperature after air bleed stages of engine compressor. Air temperature and pressure at turbine inlet, temperature and pressure at turbine outlet and rotational speed of rotor are calculated by means of system modulating unit. Then, degree of reduction of pressure in turbine, present magnitude of corrected rotational speed of rotor and optimal magnitude of corrected rotational of rotor corresponding to maximum efficiency of turbine are determined. Braking torque of rotor is changed by acting on braking unit till optimal and present magnitudes of rotational speed of rotor get equal. In case rated magnitude of air temperature at turbine outlet exceeds preset magnitude, flow rate of purging air is decreased or increased till magnitudes get equal. When these temperatures are equal, consumption of fuel is determined for each bleed stage and is analyzed for obtaining minimum consumption of fuel. Then, air temperature and pressure at turbine inlet, temperature and pressure at turbine outlet and rotational speed of rotor are determined by means of sensors. According to results thus, obtained, above-mentioned parameters are determined and processes are repeated till optimal and present magnitudes of corrected rotational speed of turbine rotor and preset and measured magnitudes of air temperature at turbine outlet get equal after which actual consumption of fuel is determined.
EFFECT: reduced consumption of fuel.
6 cl, 1 dwg
FIELD: mechanical engineering; axial-flow compressors.
SUBSTANCE: invention relates to disk of axial-flow compressor of turbomachine containing system of centripetal air takeoff for cooling of turning arranged in passage part of compressor. Said air takeoff system contains channels 9 made out of the limits of disk working section parallel to said section in thickened part forming projections out of the limits of working section on surface 7 of said disk. In proposed disk takeoff channels 9 are open in axial direction over radial extent.
EFFECT: simplified design of disk of axial-flow compressor.
7 cl, 3 dwg
FIELD: oil industry.
SUBSTANCE: unit comprises pump, driving electric motor, and heat conducting member that cooperates with the electric motor for its cooling. The unit is provided with the chamber filled with oil and connected with the base of the electric motor and is in communication with it through the central tube mounted inside it and radial space between the tube and wall of the chamber. The heat conducting member is made of a set of heat pipes shaped into disks with axial opening. The outer diameter of the chamber is less than that of the electric motor. The outer diameter of the heat pipes does no exceed the diameter of the electric motor.
EFFECT: enhanced reliability.
FIELD: mechanical engineering; turbomachine.
SUBSTANCE: invention relates to axial-flow compressor furnished with centripetal air takeoff device 2 in passage part 5 of compressor. Said air is designed for cooling of turbine. Compressor has two rims of working blades 4, 7 which pass radially outwards to periphery of two sequential disks 3, 6 connected by outer shell 9 provided with holes 14, and rim of fixed straightening blades 8 arranged in passage part 5 between two rims of working blades. These holes serve as air inlets of said air intake device and they open in ring groove 12 provided under clearance 13 separating inner flanges 11 of straightening blades 8 from rim of inlet disk. Said ring groove communicates with passage part through said clearance. Ring groove 12 is furnished with fixed guides 20 providing turbulent centripetal motion of air circulating in ring groove 12 in direction of rotation of compressor to reduce relative velocity of air getting into holes 14 relative to said rotating holes. Guides are provided with blade sections fastened under inner flanges 11 of straightening blades 8.
EFFECT: improved cooling of compressor.
6 cl, 6 dwg
FIELD: oil producing industry.
SUBSTANCE: invention relates to submersible pumping sets with cooling systems of submersible oil-filled electric motors. Proposed submersible pumping set contains pump, gas separator and drive electric motor arranged in forced flow-around housing with holes on side surface. Centrifugal gas separator is furnished with additional screw unit after separating unit (in direction of liquid flow), inlet part of gas separating channel to remove gas-liquid mixture being formed by space with additional screw unit. Housing is made to provide flow of liquid pumped out of annular space through side holes of housing to inlet holes of gas separator.
EFFECT: improved reliability of pumping set owing to effective operation of force cooling system of drive motor when setting well in operating conditions.
4 cl, 2 dwg
FIELD: non-positive-displacement pumps.
SUBSTANCE: system comprises first openings (13) through which the compressed air is discharged from the compressor and is branched to flow into adjacent spaces (11) and (12) in housing (1).
EFFECT: expanded functional capabilities.
4 cl, 3 dwg
FIELD: oil producing industry; hydraulic machine building.
SUBSTANCE: invention relates to submersible centrifugal electric pumps designed for lifting formation fluids, particularly, oil from well to surface. Proposed submersible electric pump contains submersible electric motor enclosed in cooling jacket and protector and pump installed over motor. Cooling jacket is open from below and is secured on electric pump by upper end. Upper end of cooling jacket is secured on upper part of protector housing. Space of cooling jacket communicates with space of pump through holes made in protector housing. Upper part of protector housing is made widening, with outer diameter smaller than diameter of pump flange, and is connected with upper end of cooling jacket by means of union nut and inserts. Electric pump can contains suction pipeline whose upper end is connected with lower end of cooling jacket, and lower end is furnished with entrapping filter.
EFFECT: improved reliability in operation irrespective of location of electric pump relative to source to liquid to be pumped out.
3 cl, 3 dwg
FIELD: mechanical engineering; engine cooling systems.
SUBSTANCE: in proposed fan cooling unit of car engine use is made of pair of overlapping fans to provide uniform flow through radiator of heat exchanger and maximum capacity of fans at limited sizes of electric motors. One fan of each pair has support members placed in front in direction of air flow, and the other has support members placed behind in direction of air flow aimed at minimization of axial sizes of unit.
EFFECT: increased capacity of fans, reduced noise level.
FIELD: stators of gas-turbine engine for aircraft and ground employment.
SUBSTANCE: proposed stator has inner body connected with outer body by means of two flexible members and blowing cavity which is bounded by flexible member, taper and cylindrical perforated partitions; I/h=0.1-1.5, where I is distance between taper partition and other flexible member and h is distance between cylindrical perforated partition and outer surface of inner body.
EFFECT: enhanced reliability and economical efficiency due to enhanced efficiency of radial clearance control system.
FIELD: manufacture of compressors, namely of low-capacity high-pressure centrifugal compressors.
SUBSTANCE: centrifugal compressors includes housing 1 in which rotor 2 with impellers 3, diaphragms 4,5 and built-up diaphragms 6 - 11 are mounted. Impellers 3, diffusers 12, rotary elbows 14 b reverse guiding apparatuses 13 form stage 15. Heat insulation members 16 - 21 whose thickness increases from first to last stage are built in built-up diaphragms 6 - 11. Invention provides enhanced polytropic efficiency of centrifugal compressor due to lowered inner heat fluxes between stages of flow-through portion.
EFFECT: enhanced efficiency.