The linear motor oil pumping machine of built-in stator
Affiliated technical field
The utility model relates to a kind of linear motor oil pumping machine, is mainly used in oil field sucker-rod pumping technical field.
The employing linear electric motor are that the pumping unit of power is compared with traditional beam pumping unit, and advantage is a lot.Linear electric motor to-and-fro motion mode meets the motion mode of oil well pump needs, and essential transformation through motion mode when having overcome electric rotating machine and driving promptly overcome motor rotation mode outputting power, essentially pass through switching mechanism and change straight line motion into.Linear motor oil pumping machine can reduce power consumption, and saves the pumping unit manufacture cost.Therefore the patent application of linear motor oil pumping machine is a lot.As Chinese patent 96217638.9, Chinese patent 99256966.4 and Chinese patent 01204055.X, all relate to the patent application of linear motor oil pumping machine.These linear motor oil pumping machines generally are made up of rope hanger, wire rope, sheave block, support, electric mover, motor stator and Equilibrator.Linear motor stator electric is fixed on the support inboard, and electric mover is installed in the middle of the motor stator.Propping up top of the trellis has sheave block, and wire rope connects rope hanger and electric mover by sheave block.Equilibrator directly is connected the linear motor rotor lower end, and linear motor rotor and Equilibrator are installed in the same side of support.Chinese patent 99256966.4 is exactly this structure that adopts.Though, in Shen Qing the patent, improving to some extent on the balance mode or on the sheave block position afterwards, all not outstanding the variation do not have material alterations.The patented technology scheme of being applied for, useful effect is not fairly obvious.Topmost shortcoming is on the structure that these linear motor oil pumping machines exist: linear motor stator electric is fixed on the support inboard, and electric mover is installed in the middle of the motor stator.The conventional construction that this is for a long time to be adopted, this structure is continued to use now always.This structure outermost surface is a support, the inboard fixedly linear motor stator electric of support, and mover is in the middle of stator.During linear electric motor work, produce a large amount of heats.Heat can not finely distribute between two stators, assembles in linear electric motor, and after linear electric motor work a period of time, temperature rises, and working efficiency descends, and consumes a large amount of electric energy.In addition, analyze from the force structure of support, the huge pulling force of sucker rod makes support produce the curved incline distortion; Support also bears the alternate load that bring in magnetic field in addition.Be reinforcing bracket, can only adopt relatively large number shaped steel welding support, increase the support resistance to flexure.Cause increasing weight support frame, consume great deal of steel.Stator is fixed on the linear motor oil pumping machine of support inboard, maximum shortcoming is: owing to constitute the permanent magnet of motor stator or claim electric motor primary, be fixed together with support, become same carrier, it is big that gap between deformation of timbering rear motor mover and the stator becomes, sometimes cause permanent magnet to come off, electric efficiency is greatly reduced.
The model utility content
The purpose of this utility model is: in order to overcome the unreasonable structure that the linear motor oil pumping machine permanent magnet is fixed on the support inboard, reduce the shortcoming of electric efficiency; The heat that produces when overcoming machine operation can not finely distribute, and motor heats up, and working efficiency descends, the problem that consumes a large amount of electric energy; Overcome the shortcoming that deformation of timbering rear motor air gap changes.The utility model provides a kind of linear motor oil pumping machine of built-in stator.The heat that the linear motor oil pumping machine of this built-in stator produces in the time of can not only improving the support force situation and can make linear electric motor work is distributed well, guarantees that the machine operation temperature is normal.
The technological scheme that its technical problem that solves the utility model adopts is: the linear motor oil pumping machine of built-in stator is made up of rope hanger, flexible linking device, pulley, cylinder, support, electric mover, motor stator and Equilibrator.Propping up top of the trellis has pulley and cylinder, and the flexible linking device two ends connect rope hanger and electric mover.Flexible linking device is walked around pulley and cylinder.Other has flexible linking device to connect Equilibrator.Described flexible linking device comprises wire rope, band rope, line belt, chain etc.It is characterized in that: erect in the support and be fixed with mainboard, mainboard thickness is between the 15-45 millimeter, and width is between the 300-1300 millimeter, and height is between the 5000-12000 millimeter.Linear motor stator electric is fixed on the mainboard bi-side, and stator is a permanent magnet.Electric mover is in the motor stator outside.Be fixed with guide rail along the mainboard setting, rail length is between the 5000-12000 millimeter.The effect of guide rail is: the restriction electric mover can only move up and down along guide rail, produces shift phenomenon and mainboard generation friction when preventing the electric mover motion.Be fixed with guiding wheel seat and upper saw pulley on the mover, between two movers the connection leading screw arranged, connecting on the leading screw has Regulation spring, and fixes with nut.
In order to make full use of the counter-bending ability of mainboard, mainboard is erect the direction of installing and is in support: mainboard side is to the direction of well head and rope hanger.
Equilibrator can adopt flexible linking device to be connected the linear motor rotor lower end, also can be fixed on the electric mover periphery.Flexible linking device comprises chain, wire rope, band rope etc.
Beneficial effect of the present utility model really is, overcome existing linear motor oil pumping machine stator outside, and mover causes deformation of timbering in interior unreasonable structure, causes permanent magnet generation deformation, the shortcoming that motor gas-gap can change; The heat that produces during machine operation can not distribute, the shortcoming that working efficiency descends; In addition, by facts have proved, press the pumping unit that the utility model scheme is made, also obtained beyond thought effect: the permanent magnet that the mainboard both sides are fixing, the magnetic loop of motor is reasonable, makes two row's permanent magnets improve magnetic about 10%, effectively provide kinetic energy for mover, increase mover thrust, electric efficiency greatly improves, saving power.In addition, the mainboard that permanent magnet is posted on the two sides bears magnetic field and brings immense pressure, and pressure is cancelled out each other.For this reason, support does not bear the load that bring in magnetic field, has reduced the alternate load that bring in magnetic field that support bears.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a plan view of the present utility model, represents the linear motor oil pumping machine overall structure of built-in stator and each zero, position component and annexation.Especially represent the relation between mainboard (9), guide rail (10) and mover (8) and the support (7).
Fig. 2 is a right elevation, represents the relation between mainboard (9), guide rail (10), the mover (8) from a side.
Fig. 3 is the partial enlarged drawing of right elevation, more clearly from vertically reflecting the relation between mainboard (9), guide rail (10) and mover (8) and the upper saw pulley (15).
Fig. 4 is the drawing in side sectional elevation of Fig. 3, from laterally reflecting the relation between mainboard (9), guide rail (10) and mover (8) and the upper saw pulley (15).
In the drawings, 1. well head, 2. rope hanger, 3. band rope, 4. pulley, 5. cylinder, 6. roller seat, 7. support, 8. mover, 9. mainboard, 10. guide rail, 11. bases, 12. Regulation springs, 13. the connection leading screw, 14. guiding wheel seats, 15. upper saw pulleys, 16. Equilibrators, 17. hangers, 18. stators.
Consult accompanying drawing 1 and Fig. 2.The linear motor oil pumping machine of built-in stator, rope hanger (2) connects the sucker rod and the band rope (3) of production wellhead (1).Band rope (3) belongs to one of flexible linking device.Band rope (3) is walked around pulley (4), cylinder (5), and the other end connects hanger (17), and hanger (17) connects linear motor rotor (8).Cylinder (5) is fixed on the roller seat (6) at support (7) top.Support (7) is high 12000 millimeters, adopts shaped steel to be welded.As adopt welding such as pipe, angle steel, channel-section steel, rectangular tube.Equilibrator (16) is fixed together with electric mover (8).Erect in the linear motor oil pumping machine support (7) of built-in motor stator and be fixed with mainboard (9).Mainboard (9) is to be welded into by steel plate.Mainboard (9) thickness is at 20 millimeters, and width is 500 millimeters, 12000 millimeters of height.Linear motor stator electric (18) is fixed on mainboard (9) bi-side, and motor stator (18) is made by permanent magnet material.Electric mover (8) is in motor stator (18) outside.Be fixed with guide rail (10) on the edge of mainboard (9), guide rail (10) length is 12000 millimeters.Guide rail (10) adopts crane runway.Mainboard (9) is erect installation in support, it erects fixing direction is that mainboard (9) side is to well head (1) and rope hanger (2).Consult accompanying drawing 3, accompanying drawing 4.For increasing the stationarity of mover (8) when moving up and down, on mover (8), be fixed with guiding wheel seat (14) and upper saw pulley (15).When electric mover (8) moved, upper saw pulley (15) was gone up at guide rail (10) and is rotated, and the gap between electric mover (8) and the motor stator (18) is remained unchanged.Adopt 8 connection leading screws (13) to connect between two movers (8), be with 2 Regulation springs (12) on the every connection leading screw, and compress with nut.