CN2346110Y - Energy-saving asynchronous motor for beam pumping unit - Google Patents

Abstract

The utility model relates to an energy-saving asynchronous motor for a beam oil pumping machine, which is a novel asynchronous motor and solves the problem of energy saving of the motor. The utility model is characterized in that the energy-saving asynchronous motor is composed of a stator, a rotor and a winding, the power grade and the installation size of the energy-saving asynchronous motor both have universality, and the energy-saving asynchronous motor is mainly used for the energy saving and the driving of mechanical devices, such as beam oil pumping machines, machine tools, etc. The utility model is characterized in that the energy-saving asynchronous motor adopts a novel principle of energy saving, has the function of energy saving, and does not need an additional device. The utility model has the advantages of large energy-saving range and constant starting torque, has the functions of no-load, current limiting and starting, and has strong success property of real and virtual business.

Description

The beam-pumping unit energy-saving asynchronous motor

The design relates to the asynchronous motor that a kind of motor itself has power saving function.

The energy-conservation exciting curent method of saving that mainly contains of present asynchronous motor, reduce phase voltage as star angle transformation approach, add the reactance voltage drop method, other voltage drop methods, the bi-motor method adds electric capacity and improves several different methods such as power factor, but weak point is arranged all, as: need optional equipment, complex structure pollutes electrical network etc.

The design's order ground is: 1. propose a kind of asynchronous motor of the saving exciting curent of power-economizing method in the past that is different from, possess the function of angle star conversion simultaneously; 2. a kind of new motor current-limiting startup method is proposed.

The design's task is to realize like this, in stator core slot, be embedded with several and occupy the winding segments that the part groove is counted independent magnetic circuit, promptly whole winding is divided into several independently winding segments, each winding segments is multitudinous utmost point formula winding, each winding segments possesses independently lead-out wire, guide to the casing outside, the resistance value of each winding segments and additional power source parameter value match and make its electromagnetic load within permissible range, each winding segments just can insert power supply individually motor is normally moved like this, when zero load or underloading, only insert one or two winding segments and then can also just have been improved power factor by the excitatory exciting curent that reduced because of having only one or two magnetic circuit section with independent lead-out wire, reached purpose of energy saving, simultaneously, the magnetic of magnetic circuit is close also to reduce exciting curent and energy-conservation further owing to the magnetic line of force of work magnetic circuit section has reduced to work magnetic circuit section diffusion not, and low magnetic density fall in alternate can also the star angle conversion of each winding segments itself; When load strengthens, can insert the winding segments collaborative work of the quantity that adapts again, can remain under the High Power Factor operation and energy-conservation.Good groove cooperates and high machining accuracy, wherein magnetic conductor be for motor when starting, obtain constant starting torque and use by 50 all eddy current losses; It is close energy-conservation and make the magnetic circuit symmetry to reduce noise that magnetic slot-seal can reduce the average magnetic of air gap; Thereby overall effect has reached the purpose that has better effect than various method for saving energy in the past.

Energy-conservation amplitude was big when the advantage of this motor was unloaded and underloading, gravity is descending to overcome frictional resistance because oil field beam-pumping unit piston relies on oil well from principle reason, motor only need replenish a spot of insufficient section and insert a winding segments, its electric current is the part of whole winding no-load current, promptly saving exciting curent minimum is percent 50, and corresponding active loss, adding the magnetic line of force is not diffused into by the work magnetic circuit section and makes whole magnetic close lower in the work magnetic circuit section, no-load current further reduces, each alternately also possesses angle star translation function winding segments, therefore the design has overcome in the past always motor magnetic circuit and the winding custom prejudice as integral body energising operation, proposed the method for section of winding operation of the structure of winding segments, be a significant progress than in the past.

And can be angle star transformation approach, and other voltage drop methods and this method be superimposed on one and realize that energy-conservation amplitude is bigger.During the oil pumper piston stroking upward, the winding segments an amount of according to the size access of actual loading just can keep high power factor, reaches purpose of energy saving.

This motor possesses unloaded current limit starting function, insert a winding segments starting during starting under no load and can limit starting current for part, and then insert a plurality of winding segments, than the superior point of star angle transformation approach is the power failure that produces when not having the angle to change star, and can be included the conversion of star angle, thereby progression can be many, do not have the sort of electric network pollution of power electronics.

This motor meets International Electrotechnical Commission's (IEC) standard size and power grade, has good versatility, than the non-type bi-motor of size obvious improvement is arranged, and business success is arranged; This motor is that itself has power saving function, without additional equipment, and as inverter or reactor etc., thereby small investment; The design is owing to there is magnetic conductor to exist between end ring and rotor core, produce constant starting torque in 50 all eddy current losses, load starting successfully, motor that can not essential big seat No., just can under High Power Factor, move and energy-conservation, and starting process is carried out automatically; To sum up state this motor and obvious improvement is arranged than past oil pumper asynchronous motor power-saving technology.

Below in conjunction with accompanying drawing and specific embodiments this motor is described in further detail.

Fig. 1: beam-pumping unit energy-saving asynchronous motor.

Fig. 2: Fig. 1: the A-A cutaway view.

Fig. 3: oil pumper piston up-downgoing schematic diagram

Fig. 4: the energy-conservation winding of disc-type machine

Embodiment 1: see Fig. 1, Fig. 2 is barrel-shaped motor windings, and Fig. 4 is the disc-type machine winding, be 6 utmost point motors, per two utmost points constitute a winding segments 43, and each winding segments has one group of lead-out wire 431, alternate in the winding segments be star or angle, and the multitudinous extremely concentric or multitudinous utmost point that employing occupies the independent magnetic circuit section formula winding that changes is during 2P=6, three phase windings, the utmost point are organized number=9 mutually, are divided into three winding segments, 1: when the Z=36 groove, every group of coil number is 2, pole span=6 (1-7), Y1=(1-6), Y2=(1-8), when Z=72, every group of coil number-4, pole span=12 (1-13), Y1=(1-10), Y2=(1-12), Y3=(1-14), Y4=(1-16); During 21=4, be divided into two winding segments, be divided into 4 winding segments during 2P=8, to other numbers of poles, the number of phases can be implemented by above-mentioned rule and method; Each winding segments drive motors that can work independently, every section itself also can angle star changing-over, further energy-conservation; Its using method is: see Fig. 3, send descending automatically controlled signal when descent of piston, insert a winding segments 43 by 431 in lead-in wire; When piston stroking upward, send up automatically controlled signal, again the several windings section 43 that adapts of multiple access and load capacity; Having at magnetic conductor 421 between end ring 422 and rotor core 42 makes starting torque constant; Magnetic slot-seal 411 is close in order to reduce the average magnetic of air gap, and the noise reduction sound.

Claims (2)

1: the beam-pumping unit energy-saving asynchronous motor, by stator (41), rotor (42) and the magnetic conductor (421) between rotor end ring (422) and rotor punching, magnetic slot-seal (411) .. forms, it is characterized in that: in stator core (41) groove, be embedded with several and occupy the independent winding section (43) that the part groove is counted the independent magnetic circuit section, each winding segments (43) possess one group can be independently-powered independent lead-out wire (431), resistance value of each winding segments (43) and additional power source parameter value match and make its electromagnetic load within permissible range.

2: motor according to claim 1: it is characterized in that: winding segments (43) is multitudinous utmost point winding.

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