Motor-fan unit

FIELD: electrical engineering.

SUBSTANCE: proposed motor-fan unit that can be used, for instance, in mining mechanical engineering is built around squirrel-cage induction motor and has frame with stator and rotor mounted therein. Novelty is that rotor carries fan blades, stator and rotor have conical surfaces, angles at vortices of stator and rotor cones are greatly different with respect to their contact between mentioned conical surfaces in absence of their wedging to afford antifriction bearing function, and stator mounts cleat preventing rotor-to-stator shift , for instance in axial direction.

EFFECT: simplified design at enhanced operating reliability of motor-fan unit.

1 cl, 2 dwg

 

The invention relates to ventilators and can be applied in mining engineering.

Famous fans, used for passing a dead-end workings (oven, salable, drifts and other), having in its composition frame, on which is installed a separate motor and a separate fan connected coupling [1].

The disadvantage of this design is its complexity.

The objective of the invention is to simplify the design and increase the reliability in operation.

This problem is solved by the fact that the motor-fan designed for meringue asynchronous motor with squirrel-cage rotor, comprising a housing in which are mounted the stator and the rotor contact surface of the stator and rotor is made conical. The angles at the vertex of the cones of the stator and rotor are slightly different in size. The stator is mounted strap to prevent shift between the stator and the rotor.

The invention is illustrated by drawings, where figure 1 shows the General construction of the motor-fan figure 2 - scheme of the mutual location of the packages of the rotor and stator.

The motor-fan, designed on the basis of the asynchronous motor with squirrel-cage rotor, includes a housing 1 in which is mounted the stator 2 and the rotor 3. On the rotor 3 mounted blades 4 voltage is A. The contacting surface of the stator 2 and the rotor 3 is made conical. Angle α1at the apex of the cone of the stator 2 and the angle α2at the top of the cone rotor 3 are slightly different from each other in value. On the stator 2 5.

The device works in the following way:

When the motor is started and the voltage applied to the stator 2, mounted in the housing 1, the rotor 3 with the blades of the fan 4 is driven. Due to the slight difference in angles α1and α2at the apex of the cones of the rotor 3 and stator 2 is achieved good contact between the conical surfaces is a function of the sliding bearing between the conical surfaces), and also achieved the desired smallest gap between the surfaces of induction. On the other hand, a slight difference in the angles α1and α2at the vertex of the conical surfaces of the rotor 3 and stator 2 guarantees the absence of jamming these surfaces in contact. Strap 5, mounted on the stator 2, serves to prevent shifting of the rotor 3 relative to the stator 2.

The motor-fan is a one-piece design, which is installed on the frame as a conventional electric motor and connected to the electricity network as an asynchronous motor with squirrel-cage rotor, combining p and functions of the motor and fan.

Sources of information

1. Maemowiki. Design of induction motors. Kuibyshev book house, 1970

The motor-fan, designed on the basis of the asynchronous motor with squirrel-cage rotor, comprising a housing in which is mounted a stator and a rotor, wherein the rotor mounted fan blades, the surface of the stator and rotor are made conical, with the angles at the vertex of the cones of the stator and rotor are different from each other in magnitude to achieve contact between the said conical surfaces in the absence of jamming with the enforcement functions of the sliding bearing and the stator plate is installed to prevent shift between the rotor and stator.



 

Same patents:

FIELD: electromechanical engineering; automatic control systems for maintaining temperature and moisture content of electrical machine windings within desired optimal values.

SUBSTANCE: novelty is that newly introduced in electrical machine computer unit are machine temperature and moisture content mathematical model unit, correction unit, measuring unit, comparison unit, and control action signal shaping unit. Applied to inputs of mathematical model unit are signals arriving from outputs of machine and drier current and voltage sensors, machine and fan shaft speed, cooling medium temperature, and cooling duct outlet air moisture content sensors, as well as control action correcting computation process of armature, main-pole, and interpole winding insulation local maximal temperature and moisture content. Correcting unit functions to compare calculated and measured values of mean temperature and moisture content of main-pole, compensating, and interpole winding insulation, mean calculated values of these parameters passed from mathematical-model unit, and their measured values picked off measurement unit being applied to correction unit input; control action correcting computation of mentioned parameters picked off correction unit is sent to mathematical-model unit. Comparison unit is used to compare calculated values of mentioned parameters with their desired values and to generate error signals applied to comparison unit input which present difference between calculated and desired values of mentioned parameters; applied to comparison unit inputs are calculated values of mentioned parameters arriving from mathematical-model unit output as well as desired values of these parameters. Output signal of control-action signal shaping unit is passed to input of machine cooling system fan controlled drive; comparison-unit output error signals, signal indicating device change-over to emergency running taken off correction unit, as well as signals picked off electrical-machine output power computing unit and from electrical-machine current sensor are passed from correction unit to shaping-unit inputs.

EFFECT: enlarged functional capabilities.

3 cl, 2 dwg

FIELD: electromechanical engineering; rotors of air-cooled electrical machines.

SUBSTANCE: proposed rotor is provided with guide vanes made of nonmagnetic material and tangentially disposed between poles, baffle plates in the form of semi-bowl, radial troughs disposed on butt-end surface of rotor, and axial ducts communicating with respective radial ones. Rotor incorporates provision for raising current density thereby enhancing electrical machine efficiency.

EFFECT: improved cooling conditions for all stator and rotor parts, reduced temperature and enlarged service life of windings.

5 cl, 4 dwg

FIELD: electrical and electromechanical engineering; closed-cycle cooling systems for turbogenerators and other electrical machines using fans as delivery members.

SUBSTANCE: proposed method for gas cooling of electrical machine using closed-cycle exhaust-ventilation system involves delivery of cooling gas from stator coolers and from rotor coolers through fans disposed either side of rotor barrel and through rotor ducts, whose inlets and outlets are disposed on different radii of rotor motion, over three parallel paths to rotor ducts and stator core ducts; gas heated within these ducts is conveyed to stator and rotor coolers through hot gas accumulating chamber organized in vicinity of stator end windings. In the process gas heated in rotor ducts and some portion of gas heated in stator ducts is conveyed by means of fans to stator coolers, and remaining portion of gas heated in stator ducts is passed directly to rotor coolers. For implementing this method, electrical machine is provided with cooling ducts in main area of stator core uniformly distributed over its circumference. Entrance in and exit from each duct is made on core outer surface so that they do not communicate with stator-to-rotor gap thereby eliminating intercommunication between stator and rotor cooling systems and affording uniform winding and iron temperature distribution through length and circumference of stator core. Hot gas formed in stator-to-rotor gap does not reach stator ducts which raises stator winding and iron cooling effectiveness. Proposed cooling system provides for reducing slot height and stator core outer diameter thereby enabling reduction of material input due to reduced consumption of electric steel, winding copper, and high-voltage insulating materials. Novelty is also that cooling of stator core butt-end part is organized over single-jet circuit in which gas flows over radial cooling ducts between iron stacks from stator core periphery to end windings thereby raising cooling effectiveness for stator core butt-ends and ensuring electrical machine running consuming reactive-power. Total gas flow circulating in electrical machine cools down stator end windings and its butt-end structural components which makes it possible to dispense with any additional delivery sources for cooling these components.

EFFECT: enhanced efficiency due to reduced windage loss, augmented cooling efficiency of stator core and winding, and reduced material input.

1 cl, 1 dwg

The invention relates to the field of electrical and electric engineering, in particular to two induction generators DC

The invention relates to the field of electrical engineering and can be used in electrical engineering

The invention relates to the field of electrical engineering, namely the cooling of electric machines, and can find application in electric vehicles of the closed type

The invention relates to the field of electrical engineering and can be used in cooling systems of high-voltage electrical machines, in particular, turbine generators with the use of high-voltage cables for the stator winding with a large number of turns and deep groove

Electric machine // 2141712
The invention relates to the field of electrical engineering, namely non-contact DC motor with air cooling and long ventilation, such as the garment industry

The invention relates to electrical engineering, and in particular to methods and means of cooling asynchronous electric machine with a stator and a single rotor

Electric machine // 2107377

FIELD: electric engineering, in particular, engineering of rotary contact devices.

SUBSTANCE: rotary contact device has contact couples made of smooth current-conductive rings and rings with leafs sliding along the latter, while these rings are held on electric-insulating bases, some of which, forming moving portion, can rotate relatively to others, which form immovable portion of device, rotary portion is made in form of electric engine rotor, meant for mounting devices and mechanisms, on external surface of rotor permanent magnets are glued, and magnetic duct is pressed into body together with winding, on rotor, sliding contacts are held, immovable portion of device has carrier, held on base, mounted on the body. In the carrier, rotation angle indicator may be held.

EFFECT: possible use of rotary contact device for rotation of devices and mechanisms held thereon, excluding separate engine and decreasing system dimensions.

2 cl, 2 dwg

Electric motor // 2248657

FIELD: electrical engineering; gearless drives primarily used for vehicles.

SUBSTANCE: proposed motor has circular stator core with permanent magnets symmetrically disposed on its outer and inner surfaces over its circumference in alternating polarity and through core thickness in opposing polarity; it also has double-section rotor one of whose sections encloses stator and functions as external section while other section is disposed inside stator and functions as internal section. In addition motor has commutator-type current distributor and current collector both mounted for contacting commutator-type distributor segments and are connected to area of electromagnets of mentioned rotor sections.

EFFECT: enhanced motor torque.

3 cl, 2 dwg

FIELD: electrical engineering; electric drives or power generators.

SUBSTANCE: proposed dynamoelectrical machine is set in rotary motion by means of magnetic induction acting in linear electric motors. It has ring-shaped rotor made in the form of flat ring and provided with at least one circular rail engageable with sliding guides; it also has stator that carries inductance coil and interacts with at least one part of rotor. Circular rail is disposed outside or inside with respect to stator.

EFFECT: simplified design, facilitated maintenance, enhanced reliability.

8 cl, 20 dwg

Induction motor // 2171542

Induction motor // 2171540
The invention relates to electrical engineering and can be used as asynchronous motors for a complete set of actuators for domestic and industrial use, in particular electric drives of pumps

The invention relates to electrical engineering, namely, to end electric machines with squirrel-cage rotor or permanent magnet and two stators and may find application in electric drive of industrial robots, transport, robocar or in electric vehicles and electric vehicles

FIELD: electrical engineering; electric drives or power generators.

SUBSTANCE: proposed dynamoelectrical machine is set in rotary motion by means of magnetic induction acting in linear electric motors. It has ring-shaped rotor made in the form of flat ring and provided with at least one circular rail engageable with sliding guides; it also has stator that carries inductance coil and interacts with at least one part of rotor. Circular rail is disposed outside or inside with respect to stator.

EFFECT: simplified design, facilitated maintenance, enhanced reliability.

8 cl, 20 dwg

Electric motor // 2248657

FIELD: electrical engineering; gearless drives primarily used for vehicles.

SUBSTANCE: proposed motor has circular stator core with permanent magnets symmetrically disposed on its outer and inner surfaces over its circumference in alternating polarity and through core thickness in opposing polarity; it also has double-section rotor one of whose sections encloses stator and functions as external section while other section is disposed inside stator and functions as internal section. In addition motor has commutator-type current distributor and current collector both mounted for contacting commutator-type distributor segments and are connected to area of electromagnets of mentioned rotor sections.

EFFECT: enhanced motor torque.

3 cl, 2 dwg

FIELD: electric engineering, in particular, engineering of rotary contact devices.

SUBSTANCE: rotary contact device has contact couples made of smooth current-conductive rings and rings with leafs sliding along the latter, while these rings are held on electric-insulating bases, some of which, forming moving portion, can rotate relatively to others, which form immovable portion of device, rotary portion is made in form of electric engine rotor, meant for mounting devices and mechanisms, on external surface of rotor permanent magnets are glued, and magnetic duct is pressed into body together with winding, on rotor, sliding contacts are held, immovable portion of device has carrier, held on base, mounted on the body. In the carrier, rotation angle indicator may be held.

EFFECT: possible use of rotary contact device for rotation of devices and mechanisms held thereon, excluding separate engine and decreasing system dimensions.

2 cl, 2 dwg

Motor-fan unit // 2292623

FIELD: electrical engineering.

SUBSTANCE: proposed motor-fan unit that can be used, for instance, in mining mechanical engineering is built around squirrel-cage induction motor and has frame with stator and rotor mounted therein. Novelty is that rotor carries fan blades, stator and rotor have conical surfaces, angles at vortices of stator and rotor cones are greatly different with respect to their contact between mentioned conical surfaces in absence of their wedging to afford antifriction bearing function, and stator mounts cleat preventing rotor-to-stator shift , for instance in axial direction.

EFFECT: simplified design at enhanced operating reliability of motor-fan unit.

1 cl, 2 dwg

FIELD: naval electric engineering, in particular, immersed electric machines which may be used in composition of electric propulsion plant of underwater manned and unmanned small-dimension objects with unlimited immersion depth, and also as maneuvering propulsion devices, active rudders of any underwater or above-water objects.

SUBSTANCE: in combined electric propulsion plant, containing a screw built into hollow cylindrical rotor, stator with windings and bearing shields, combined in single structure, an asynchronous electric motor with hollow three-layered rotor is used, which is made in form of assembly of three concentric cylinders of varying thickness of various materials with predetermined electromagnetic properties, in accordance to the invention, external cylinder with thickness hext combines functions of working element and screen and has screw-groove profile on the surface, middle working cylinder with thickness hwrk, in which working vortex currents are induced, is made of separate segments in amount of nsegm, each segment has clean longitudinal grooves in axial direction in amount of ngrv, all segments are mutually closed on ends with current-conductive short-circuit rings, internal cylinder with thickness nin, acting as magnetic duct, composed of separate plates 0,5-2 mm thick and covered by protective sealing screen on the outside, while geometric dimensions of rotor elements are selected from ratios hext=(2-2,5)Δν≈2-3mm, hwrk=0,9Δ2, hin=(1,2-1,5)Δ3, hkν, ak=0,7-1mm, vk=3-3,5mm, nsegm=2p, hp=(0,6-0,7)Δ2, an=1,5-2mm, Vn=τ/4, where Δν, Δ2, Δ3 - depth of penetration of magnetic field into corresponding cylinder, hK, aK and vk - respectively, depth, width and step of screw groove, 2p - number of poles, hp, ap and vk - respectively, depth, width and distance between longitudinal grooves, τ - polar division of rotor, ν - harmonic of high order field.

EFFECT: suggested combined electric propulsion plant with asynchronous motor makes it possible to fully realize all advantages of asynchronous motors with multi-layer hollow rotor during their operation in composition of propulsion electric plats; motors of aforementioned design are simpler to manufacture as opposed to synchronous ones with constant magnets, are powered by standard three-phased network, controlled by standard launch-control equipment, have no negative influence on powering network, have reduced vibration, ensure best energy characteristics (efficiency and cos φ) with nominal load, and high launch momentum at low launch current, soft mechanical characteristic and high switching speeds improve main operational characteristics of the plant in transfer modes (launch, reverse, rotation frequency adjustment) and increase its efficiency as a whole.

3 cl, 3 dwg

Up!