CN204794616U - Magnet steel is fixed towards piece and two poles of earth permanent magnetism motor of diving in step - Google Patents
Magnet steel is fixed towards piece and two poles of earth permanent magnetism motor of diving in step Download PDFInfo
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- CN204794616U CN204794616U CN201520446343.0U CN201520446343U CN204794616U CN 204794616 U CN204794616 U CN 204794616U CN 201520446343 U CN201520446343 U CN 201520446343U CN 204794616 U CN204794616 U CN 204794616U
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Abstract
Magnet steel is fixed towards piece and two poles of earth permanent magnetism motor of diving in step belongs to dive motor technical field. Include towards piece body (20), evenly offered towards the outer circumference of piece body (20) on a plurality of actuating lever fixed orifices (21), the magnet steel fixed slot has been seted up on dashing piece body (20) in that actuating lever fixed orifices (21) is radial inboard, the magnet steel fixed slot is by the symmetry setting in a set of N utmost point magnet steel fixed slot (22) and a set of S utmost point magnet steel fixed slot (23) constitution towards piece body (20) both sides, the magnet steel fixed slot is wide for the outside, it is inboard narrow trapezoidal, a plurality of N utmost point magnet steel fixed slot (22) and a plurality of S utmost point magnet steel fixed slot (23) all become the arc shooting. The two poles of the earth permanent magnetism motor of diving in step, rotor (8) are fixed towards the piece including the foretell magnet steel of magnet steel, initial the two poles of the earth utmost point permanent magnetism scheme that has adopted in the conceptual design of well with the dive motor, efficiency and power factor are than conventional diving motor national standard, and external each advanced unit improves a lot.
Description
Technical field
Magnet steel fixes punching and the two poles of the earth permanent-magnet synchronous submersible motor, belongs to submersible motor technical field.
Background technology
Permagnetic synchronous motor is realized by permanent magnet due to its excitation structure, does not need stator additionally to provide exciting current.Thus the power factor of motor can be done quite high (can reach 1 in theory).Stator current due to idle component extremely low, so stator current is also remarkable lower than same number of poles, with capacity asynchronous motor, more obvious when high number of poles motor especially, can little 25%-40%, stator copper loss therefore can be made to reduce 30%-50%.Because rotor no current passes through, therefore unlike asynchronous machine, rotor has electric current, causes lossy, and this part loss generally can account for 5 ~ 10% of total losses in asynchronous machine.Therefore permagnetic synchronous motor total losses generally reduce 10%-20% than asynchronous machine.Simply say, asynchronous starting permanent magnet synchronous motor (Line-startPermanentMagnetSynchronousMotor, LSPMSM) be exactly place permanent magnet in the rotor of three phase induction motor, the asynchronous torque relying on damping rotor windings to produce realizes starting.During normal operation, the rotating magnetic field produced by rotor permanent magnet magnetic pole and stator winding interacts, and produce constant torque, the rotating speed of motor is synchronous speed, and now rotor damping winding no longer works.
Well diving magneto, due to the impact by hole diameter, contour structures is slender type, i.e. motor external diameter very little (being generally no more than φ 350), this also makes the rotor of motor internal thinner, and to ensure that rotor has must rigidity, armature spindle again can not be too thin, and this also causes the space between punching body internal-and external diameter at full stretch.And asynchronous starting permanent magnet synchronous motor needs asynchronous starting ability on the one hand, need again the ability maintaining synchronous operation on the other hand, this makes that rotor exists started squirrel-cage and permanent magnet simultaneously.The design space of punching body is natively little, and in iron core, magnet steel is inlayed in design again, and make structure become particularly complicated, design difficulty increases greatly.
Start mouse dragon and there is larger contradiction with the Position Design of permanent magnet.Due to the existence of rotor permanent magnet, its average torque-revolutional slip curve is caused to occur a lower Lower pit when the slow-speed of revolution, on the one hand in order to ensure that motor starts smoothly (this kind of motor cannot carry out reduced voltage starting to limit starting current as normal asynchronous), higher starting current needs to suppress by the optimal design of slot shape of rotor, on the other hand, permanent magnet consumption is reduced in order to improve pull up torque, need to increase stator winding circle, this makes manufacturing cost and man-hour increase; Simultaneously, owing to starting the existence of mouse cage winding, the space of so laying permanent magnet is restricted, if the section holes starting cage rotor sliver is on the one hand excessive, permanent magnet will be close to rotating shaft further, permanent magnet is not fully utilized, and needs to increase more permanent magnet thickness and ensures electromagnetic performance; If the cross section in cage rotor sliver hole is too small on the other hand, the electric current in rotor bar can be made excessive, the caloric value of rotor bar may be made excessive, just do not have the effect of asynchronous starting.
Simultaneously owing to being subject to the impact that hole diameter is thin, all Submersible Pumps are polarized pump, therefore the design of supporting well submersible motor is also necessary for bipolar machine, but the magnet steel that rotor is inlayed is owing to adopting the two poles of the earth magnet steel, also electromagnetic scheme is made to design more difficult, the stator yoke magnetic line of force is than comparatively dense, and therefore stator yoke ratio is easier to saturated, and we just need the yoke portion that more thickeies like this.But when motor overall dimension is certain, if the space of the thicker placement in yoke portion copper cash will be less; We know if the copper placed is few, can bring a lot of problem, such as specific electric load, stator copper loss, caloric value, efficiency etc.The path that the magnetic line of force is walked is long, if the smaller change leakage field of magnetic field energy is relatively large, therefore needs stronger magnetic field energy.
Utility model content
The technical problems to be solved in the utility model is: overcome the deficiencies in the prior art, a kind of magnet steel is provided to fix punching and the two poles of the earth permanent-magnet synchronous submersible motor, pole, the two poles of the earth permanent magnetism scheme is have employed first in the conceptual design of well submersible motor, efficiency and power factor be conventional diving motor GB comparatively, and external each advanced unit improves a lot.
The utility model solves the technical scheme that its technical problem adopts: punching fixed by this magnet steel, comprise punching body, the excircle of punching body evenly offers multiple starting bar fixing hole, starting bar constant aperture punching body to the inside offers magnet steel holddown groove, described magnet steel holddown groove is made up of the one group of N pole magnet steel holddown groove and one group of S pole magnet steel holddown groove being symmetricly set on punching body both sides, magnet steel holddown groove is narrow trapezoidal in wide, inner side, outside, multiple N poles magnet steel holddown groove and the equal camber arrangement of multiple S poles magnet steel holddown groove.
Preferably, four angles of described magnet steel holddown groove are fillet.
Preferably, the external diameter of described punching body is 110 ~ 115mm, and internal diameter is 70 ~ 75mm, and the spacing between the magnet steel holddown groove of adjacent S pole is 1 ~ 1.3mm; Spacing between the magnet steel holddown groove of adjacent N pole is 1 ~ 1.3mm.
Preferably, the external diameter of described punching body is 112mm, and internal diameter is 72mm, and the spacing between the magnet steel holddown groove of adjacent S pole is 1.2mm; Spacing between the magnet steel holddown groove of adjacent N pole is 1.2mm.
Preferably, the diameter of starting bar fixing hole is 5mm.
Preferably, the spacing between adjacent N pole magnet steel holddown groove and S pole magnet steel holddown groove is 5 ~ 20mm.
Preferably, the spacing of the excircle of described N pole magnet steel holddown groove or S pole magnet steel holddown groove and punching body is 7 ~ 8mm.
Preferably, described punching body offers five N pole magnet steel holddown grooves and five S pole magnet steel holddown grooves.
A kind of the two poles of the earth permanent-magnet synchronous submersible motor, comprise fixing stators and rotators in the enclosure, described rotor comprises magnet steel and punching fixed by as above above-mentioned magnet steel, starting bar is fixed in starting bar fixing hole to be formed and starts mouse cage, magnet steel is inlayed to be fixed in corresponding magnet steel holddown groove and is formed the two poles of the earth rotor, and motor shaft and rotor coaxial are fixed, shell closed at both ends, form the water-filling cooling chamber being filled with cooling water in the enclosure, rotor is positioned at water-filling cooling chamber.
Preferably, magnet steel surface has the Ni-Cu-Ni coating of 0.12 ~ 0.17mm; Epoxy resin is perfused with between described magnet steel and magnet steel holddown groove.
Preferably, motor shaft be provided with guide bearing by guide shaft bearing between two ends and shell up and down, guide bearing all offers with in guide shaft bearing the bosh be communicated with in water-filling cooling chamber.
Preferably, described stator, rotor and motor shaft are all vertically arranged, and motor shaft lower end is fixed with thrust bearing, below thrust bearing, be provided with core-regulating mechanism.
Preferably, described core-regulating mechanism comprises support pin of spherical end and aligning bearing, support pin of spherical end is vertically fixed on the top of aligning bearing, the upper end of support pin of spherical end is the sphere projected upwards, there is in the middle part of seat ring on the downside of thrust bearing an aligning fixed part, the upper end of support pin of spherical end abuts aligning fixed part, and the downside of aligning fixed part is the sphere matched with support pin of spherical end upper end.
A base is also installed in the below of shell, support pin of spherical end and aligning bearing, be arranged in base, at aligning bearing built with pressure regulator, the bottom of lower leading axle bearing offers the first Cooling Holes being communicated with water-filling cooling chamber and base intracavity, aligning bearing offers the second Cooling Holes being communicated with base intracavity and aligning bearing inner chamber.
Compared with prior art, the beneficial effect that the utility model has is:
1, start mouse dragon and there is larger contradiction with the Position Design of magnet steel, due to the existence of magnet steel, rotor average torque-revolutional slip curve is caused to occur a lower Lower pit when the slow-speed of revolution, this kind of motor cannot carry out reduced voltage starting to limit starting current as normal asynchronous, in order to ensure that motor starts smoothly, magnet steel of the present utility model fix punching magnet steel holddown groove is set to outside wide, inner side is narrow trapezoidal, and multiple N poles magnet steel holddown groove and the arrangement of multiple S poles magnet steel holddown groove equal camber, thus suppress higher starting current, and this structure can bring the rotor structure that pole embrace is larger, namely allow permanent magnet spread a little more as far as possible, thus stronger magnetic field energy is provided, the stator yoke magnetic line of force overcoming the two poles of the earth rotor compares comparatively dense, stator yoke ratio is easier to saturated, the problem that the path walked of the magnetic line of force is long.
2, due to rotor design requirement, magnet steel distribution comparatively dense, magnetic bridge width only has narrower, magnetic bridge is the connecting portion of adjacent N pole magnet steel holddown groove and the connecting portion of adjacent S pole magnet steel holddown groove, magnetic bridge rigidity may be not, in conjunction with processing cost and difficulty of processing, we have carried out stress analysis to it, position, magnetic bridge place is that punching body is met an urgent need the position of Relatively centralized, especially the outside portion of magnetic bridge is the position that stress is concentrated the most, namely the most easily there is the accidents such as fracture in this position, four of magnet steel holddown groove angles are all set to fillet by the present embodiment, the stress effectively reduced is concentrated, improve the rigidity of punching body.
3, due to rotor design requirement, magnet steel distribution comparatively dense, magnetic bridge width only has narrower, and its rigidity may not, and in conjunction with processing cost and difficulty of processing, carry out stress analysis to it, the spacing between the magnet steel holddown groove of adjacent S pole is 1 ~ 1.3mm; Spacing between the magnet steel holddown groove of adjacent N pole is 1 ~ 1.3mm, both magnetic bridge adopted the width of 1 ~ 1.3mm, intensity needs can be met, also can lay more magnet steel, overcome and it is believed that well submersible motor also can not arrange the wrong understanding starting mouse cage when the two poles of the earth rotor in the past.
4, fix punching due to this magnet steel and be subject to the impact that hole diameter is thin, start mouse dragon and there is larger contradiction with the Position Design of magnet steel, the starting bar being 5mm at starting bar fixing hole internal fixtion diameter forms startup mouse cage, fix while punching starts smoothly at this magnet steel of guarantee, ensure that the space of mounting magnetic steel is enough, magnet steel is fully utilized, raises the efficiency and power factor, starting bar can not be made again because electric current is excessive to cause serious heating, ensure carrying out smoothly of asynchronous starting.
5, magnet steel material is neodymium ferro-boron, and long period of soaking is easy to get rusty in water, and corrosion is the one of the main reasons that magnet steel demagnetization was lost efficacy, and therefore magnet steel must carry out preservative treatment.Coating is set on the surface of magnet steel, has effectively isolated magnet steel, make it directly not contact with water, improve the useful life of magnet steel.
6, magnet steel and N pole magnet steel holddown groove or S pole magnet steel holddown groove have the gap of 0.1mm diametrically, must shake in use procedure, and vibrations are one of major reasons for magnet steel inefficacy, for overcoming this problem, infusion epoxy resin between magnet steel and N pole magnet steel holddown groove or S pole magnet steel holddown groove, magnet steel can be completely fixed in original position after drying, in running, any movement can never be there is, effectively improve the useful life of magnet steel, and, epoxy resin is perfused with between magnet steel and N pole magnet steel holddown groove or S pole magnet steel holddown groove, can ensure can not enter water in all N poles magnet steel holddown groove or S pole magnet steel holddown groove, thus more effectively ensure that magnet steel can not get rusty because touching water.
Accompanying drawing explanation
Fig. 1 is the structural representation that punching fixed by this magnet steel.
Fig. 2 is the structural representation of rotor and stator.
Fig. 3 is the structural representation that punching fixed by this magnet steel.
Fig. 4 is the distribution schematic diagram of the magnetic line of force.
Wherein: 1, adpting flange 2, sand control ring 3, upper leading axle bearing 4, guide bearing 5, axle sleeve 6, bosh 7, stator 8, rotor 9, motor shaft 10, lower leading axle bearing 11, water-filling cooling chamber 12, first Cooling Holes 13, thrust bearing 14, support pin of spherical end 15, second Cooling Holes 16, base 17, aligning bearing 18, adjustment air bag 19, shell 20, punching body 21, starting bar fixing hole 22, N pole magnet steel holddown groove 23, S pole magnet steel holddown groove.
Embodiment
Fig. 1 ~ 4 are most preferred embodiments that this magnet steel fixes punching and the two poles of the earth permanent-magnet synchronous submersible motor, are described further below in conjunction with accompanying drawing 1 ~ 4 pair of the utility model.
With reference to Fig. 1 ~ 2, punching fixed by this magnet steel, comprise punching body 20, the excircle of punching body 20 evenly offers multiple starting bar fixing hole 21, the punching body 20 of starting bar fixing hole 21 radially inner side offers magnet steel holddown groove, described magnet steel holddown groove is made up of the one group of N pole magnet steel holddown groove 22 and one group of S pole magnet steel holddown groove 23 being symmetricly set on punching body 20 both sides, magnet steel holddown groove is narrow trapezoidal in wide, inner side, outside, and multiple N poles magnet steel holddown groove 22 and the equal camber of multiple S poles magnet steel holddown groove 23 arrange.Start mouse dragon and there is larger contradiction with the Position Design of magnet steel, due to the existence of magnet steel, rotor average torque-revolutional slip curve is caused to occur a lower Lower pit when the slow-speed of revolution, this kind of motor cannot carry out reduced voltage starting to limit starting current as normal asynchronous, in order to ensure that motor starts smoothly, magnet steel of the present utility model fix punching magnet steel holddown groove is set to outside wide, inner side is narrow trapezoidal, and multiple N poles magnet steel holddown groove 22 and the arrangement of multiple S poles magnet steel holddown groove 23 equal camber, thus suppress higher starting current, and this structure can bring the rotor structure that pole embrace is larger, namely allow permanent magnet spread a little more as far as possible, thus stronger magnetic field energy is provided, the stator yoke magnetic line of force overcoming the two poles of the earth rotor compares comparatively dense, stator yoke ratio is easier to saturated, the problem that the path walked of the magnetic line of force is long.
Further, four angles of magnet steel holddown groove are fillet.Due to rotor design requirement, magnet steel distribution comparatively dense, magnetic bridge width only has narrower, magnetic bridge is the connecting portion of adjacent N pole magnet steel holddown groove 22 and the connecting portion of adjacent S pole magnet steel holddown groove 23, magnetic bridge rigidity may be not, in conjunction with processing cost and difficulty of processing, we have carried out stress analysis to it, position, magnetic bridge place is that punching body 20 is met an urgent need the position of Relatively centralized, especially the outside portion of magnetic bridge is the position that stress is concentrated the most, namely the most easily there is the accidents such as fracture in this position, four of magnet steel holddown groove angles are all set to fillet by the present embodiment, the stress effectively reduced is concentrated, improve the rigidity of punching body 20.
By the impact that hole diameter is thin, submersible motor external diameter is very little, this also makes rotor 8 thinner, and will ensure that rotor 8 has certain rigidity, and rotor 8 axle again can not be too thin, this also causes the space between punching body 20 internal-and external diameter very little, while there is squirrel-cage bar at punching edge, will design in iron core and inlay magnet steel and become particularly difficulty, the most magnet steel of magneto that market exists all adopts rotor 8 surface-mount type, this kind of magneto does not have cage-shaped structure mostly, and rotating speed is lower.Even if there is rotating speed higher, adopt inserted magnet steel, neither bipolar machine, and between punching body internal-and external diameter, space is comparatively large, designs relatively simple.In the present embodiment, the external diameter of punching body 20 is 110 ~ 115mm, internal diameter is 70 ~ 75mm, and due to rotor 8 designing requirement, magnet steel distribution comparatively dense, magnetic bridge width only has narrower, and its rigidity may be not, in conjunction with processing cost and difficulty of processing, stress analysis is carried out to it, preferably, selects the spacing between adjacent S pole magnet steel holddown groove 23 to be 1 ~ 1.3mm; Spacing between adjacent N pole magnet steel holddown groove 22 is 1 ~ 1.3mm.
As the scheme of the best, the external diameter of punching body 20 is 112mm, and internal diameter is 72mm, and the spacing between adjacent S pole magnet steel holddown groove 23 is 1.2mm; Spacing between adjacent N pole magnet steel holddown groove 22 is 1.2mm, while guarantee punching body 20 rigidity, can lay more magnet steel, thus provide stronger magnetic field energy.Be further, the diameter of starting bar fixing hole 21 is 5mm, fix punching due to this magnet steel and be subject to the impact that hole diameter is thin, start mouse dragon and there is larger contradiction with the Position Design of magnet steel, the starting bar being 5mm at starting bar fixing hole 21 internal fixtion diameter forms startup mouse cage, fix while punching starts smoothly at this magnet steel of guarantee, ensure that the space of mounting magnetic steel is enough, magnet steel is fully utilized, raise the efficiency and power factor, starting bar can not be made again because electric current is excessive to cause serious heating, ensure carrying out smoothly of asynchronous starting.
Spacing between adjacent N pole magnet steel holddown groove 22 and S pole magnet steel holddown groove 23 is 5 ~ 20mm, N pole magnet steel holddown groove 22 or S pole magnet steel holddown groove 23 are 7 ~ 8mm with the spacing of the excircle of punching body 20, through calculation and test, this structure can while guarantee punching body 20 rigidity, more magnetic field energy is provided, and make magnet steel as far as possible near stator, magnet steel can be made like this to be fully used.
The punching body 20 of the present embodiment offers five N pole magnet steel holddown grooves 22 and five S pole magnet steel holddown grooves 23.
The utility model also provides a kind of the two poles of the earth permanent-magnet synchronous submersible motor, comprise and be fixed on stator 7 in shell 19 and rotor 8, described rotor 8 comprises magnet steel and punching fixed by above-mentioned magnet steel, multiple magnet steel fixed punch sheet is superposition axially, starting bar is fixed in starting bar fixing hole 21 to be formed and starts mouse cage, magnet steel is inlayed to be fixed in corresponding magnet steel holddown groove and is formed the two poles of the earth rotor, motor shaft 9 and rotor 8 are coaxially fixed, shell 19 closed at both ends, in shell 19, form the water-filling cooling chamber 11 being filled with cooling water, rotor 8 and stator 7 are all positioned at water-filling cooling chamber 11.Rotor 8 is owing to adopting the two poles of the earth magnet steel, motor scheme is designed more difficult, the utility model is by larger rotor 8 structure of pole embrace, namely allow permanent magnet spread a little more as far as possible, thus stronger magnetic field energy is provided, overcome the stator 7 yoke portion magnetic line of force of the two poles of the earth rotor than comparatively dense, stator 7 yoke portion ratio is easier to saturated, the problem (see figure 4) that the path walked of the magnetic line of force is long.In the motor scheme design of well submersible motor, have employed the two poles of the earth permanent magnetism scheme first, and reach re-set target.In rotor 8 structural design of well submersible motor, have employed magnet steel first inserted, efficiency and power factor be conventional diving motor GB comparatively, and (see table one) is improved a lot in external each advanced unit.
Table one
。
With reference to Fig. 3, punching fixed by the magnet steel in the present embodiment is water-filling structure, particularly, shell 19 closed at both ends, in shell 19, form the water-filling cooling chamber 11 being filled with cooling water, rotor 8 and stator 7 are all positioned at water-filling cooling chamber 11, are added with impregnating fluid in cooling water.This magnet steel fixes the rotor 8 of punching because being inlaid with magnet steel, therefore has magnetic, easily adsorbs the foreign matters such as iron filings.And the air gap between motor stator 7 and rotor 8 only has 1mm, if the foreign matter of absorption is more on rotor 8, rotor 8 may be caused to operate and to have some setbacks, affect the serviceability of motor.If things go on like this, sweep hall possibly, hinder the serious consequences such as guide bearing 4, directly affect useful life and the reliability of motor.Through long-term observation and test, we find the source of these foreign matters, and mainly the structural member of the casting such as guide shaft bearing is in the immersion of water for a long time, gets rusty and then is shed in water.Now, the anticorrosion of motor cavity just becomes particularly important.For this problem, we attempt adding appropriate impregnating fluid in the water filled at motor cavity, by adding impregnating fluid, effectively preventing the structural member of the casting be in for a long time in the immersion of water from getting rusty, effectively improve useful life and the reliability of motor.
Guide bearing 4 is provided with by guide shaft bearing between the two ends up and down of motor shaft 9 and shell 19, specific to the present embodiment, guide shaft bearing comprises upper leading axle bearing 3 and lower leading axle bearing 10, guide bearing 4 with guide shaft bearing all offers the bosh 6 be communicated with in water-filling cooling chamber 11, guide bearing 4 and chromium plating axle sleeve 5 form fastness, during rotation, the continuous engaging friction of cooling water is paid, and effectively can improve its Cooling and Lubricator condition.A sand control ring 2 is fixed with in the upper end of motor shaft 9 in the present embodiment, concrete, sand control ring 2 is fixed on the upside of upper leading axle bearing 3, and be provided with sealing ring between the top of upper leading axle bearing 3 and motor shaft 9 and seal, sand control ring 2 fully ensures that magnet steel fixes punching operationally, sewage dirt in medium enters less than motor cavity, significantly the corrosion resistance, resistance to wear etc. of lifting motor, thus ensures the useful life of motor.And this magnet steel fixes punching operationally, vibrating noise is little, does not pollute water source, belongs to green product.The upper end of shell 19 is also fixed with an adpting flange 1, for connecting water pump.
Stator 7, rotor 8 and motor shaft 9 are all vertically arranged, motor shaft 9 lower end is fixed with thrust bearing 13, core-regulating mechanism is provided with below thrust bearing 13, whole rotor 8 can be supported by core-regulating mechanism, regulate the position of rotor 8 simultaneously, ensure that rotor 8 is in the center of stator 7 endoporus all the time, ensure the void dimension of stator 7 and rotor 8, effectively ensure that the useful life of stator 7 and rotor 8, improve the dependability of motor.Concrete, core-regulating mechanism comprises support pin of spherical end 14 and aligning bearing 17, support pin of spherical end 14 is vertically fixed on the top of aligning bearing 17, and the upper end of support pin of spherical end 14 is the sphere projected upwards, and has an aligning fixed part in the middle part of the seat ring on the downside of thrust bearing 13, the upper end of support pin of spherical end 14 abuts aligning fixed part, the downside of aligning fixed part is the sphere matched with support pin of spherical end 14 upper end, regulates thrust bearing 13 by support pin of spherical end 14, thus regulates whole rotor 8, structure is simple, reliable operation.Certain the present embodiment is also provided with a thrust bearing (not shown in FIG.) in the upper end of motor shaft 9, upper end thrust bearing can prevent the axially upwardly power (dynamical reaction) that water pump produces when starting from mentioning rotor 8, then again downside guide bearing 4 is produced and impact, improve useful life.Further, be also provided with a base 16 in the below of shell 19, base 16 effectively can increase motor radiating surface and motor filled water amount, and support pin of spherical end 14 and aligning bearing 17, be arranged in base 16.As further improving, at aligning bearing 17 built with pressure regulator, the pressure that autobalance motor is inside and outside, avoids the water-filling of motor internal and environment to exchange through sealing surface.Pressure regulator is for regulating air bag 18.The bottom of lower leading axle bearing 10 offers the first Cooling Holes 12 being communicated with water-filling cooling chamber 11 and base 16 inner chamber, aligning bearing 17 offers the second Cooling Holes 15 being communicated with base 16 inner chamber and aligning bearing 17 inner chamber.
Magnet steel material is neodymium ferro-boron, and long period of soaking is easy to get rusty in water, and corrosion is the one of the main reasons that magnet steel demagnetization was lost efficacy, and therefore magnet steel must carry out preservative treatment.For this problem, carry out surface treatment to magnet steel, there is the coating of 0.15mm on the surface of every block magnet steel, divides three layers, i.e. Ni-Cu-Ni coating.Effectively isolate magnet steel, made it directly not contact with water, improve the useful life of magnet steel.
Magnet steel and N pole magnet steel holddown groove 22 or S pole magnet steel holddown groove 23 have the gap of 0.1mm diametrically, must shake in use procedure, and vibrations are one of major reasons for magnet steel inefficacy, for overcoming this problem, epoxy resin is perfused with between magnet steel and N pole magnet steel holddown groove 22 or S pole magnet steel holddown groove 23, magnet steel can be completely fixed in original position after drying, in running, any movement can never be there is, effectively improve the useful life of magnet steel, and, epoxy resin is perfused with between magnet steel and N pole magnet steel holddown groove 22 or S pole magnet steel holddown groove 23, can ensure can not enter water in all N poles magnet steel holddown groove 22 or S pole magnet steel holddown groove 23, thus more effectively ensure that magnet steel can not get rusty because touching water.
The above, it is only preferred embodiment of the present utility model, be not restriction the utility model being made to other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the Equivalent embodiments of equivalent variations.But everyly do not depart from technical solutions of the utility model content, any simple modification, equivalent variations and the remodeling done above embodiment according to technical spirit of the present utility model, still belong to the protection range of technical solutions of the utility model.
Claims (10)
1. punching fixed by a magnet steel, comprise punching body (20), the excircle of punching body (20) evenly offers multiple starting bar fixing hole (21), the punching body (20) of starting bar fixing hole (21) radially inner side offers magnet steel holddown groove, it is characterized in that: described magnet steel holddown groove is made up of one group of N pole magnet steel holddown groove (22) and one group of S pole magnet steel holddown groove (23) being symmetricly set on punching body (20) both sides, magnet steel holddown groove is that outside is wide, inner side is narrow trapezoidal, the all camber arrangements of multiple N pole magnet steel holddown groove (22) and multiple S pole magnet steel holddown groove (23).
2. punching fixed by magnet steel according to claim 1, it is characterized in that: four angles of described magnet steel holddown groove are fillet.
3. punching fixed by magnet steel according to claim 1, it is characterized in that: the external diameter of described punching body (20) is 110 ~ 115mm, and internal diameter is 70 ~ 75mm, and the spacing between adjacent S pole magnet steel holddown groove (23) is 1 ~ 1.3mm; Spacing between adjacent N pole magnet steel holddown groove (22) is 1 ~ 1.3mm.
4. punching fixed by magnet steel according to claim 3, it is characterized in that: the external diameter of described punching body (20) is 112mm, and internal diameter is 72mm, and the spacing between adjacent S pole magnet steel holddown groove (23) is 1.2mm; Spacing between adjacent N pole magnet steel holddown groove (22) is 1.2mm.
5. punching fixed by the magnet steel according to claim 3 or 4, it is characterized in that: the diameter of starting bar fixing hole (21) is 5mm.
6. punching fixed by the magnet steel according to claim 3 or 4, it is characterized in that: the spacing between adjacent N pole magnet steel holddown groove (22) and S pole magnet steel holddown groove (23) is 5 ~ 20mm.
7. punching fixed by the magnet steel according to claim 3 or 4, it is characterized in that: described N pole magnet steel holddown groove (22) or S pole magnet steel holddown groove (23) are 7 ~ 8mm with the spacing of the excircle of punching body (20).
8. punching fixed by the magnet steel according to any one of claim 1,3 and 4, it is characterized in that: described punching body (20) offers five N poles magnet steel holddown groove (22) and five S poles magnet steel holddown groove (23).
9. the two poles of the earth permanent-magnet synchronous submersible motor, it is characterized in that: comprise and be fixed on stator (7) in shell (19) and rotor (8), described rotor (8) comprises magnet steel and punching fixed by the magnet steel described in any one of claim 1 ~ 8, starting bar is fixed in starting bar fixing hole (21) to be formed and starts mouse cage, magnet steel is inlayed to be fixed in corresponding magnet steel holddown groove and is formed the two poles of the earth rotor, motor shaft (9) and rotor (8) are coaxially fixed, shell (19) closed at both ends, the water-filling cooling chamber (11) being filled with cooling water is formed in shell (19), rotor (8) is positioned at water-filling cooling chamber (11).
10. the two poles of the earth according to claim 9 permanent-magnet synchronous submersible motor, is characterized in that: magnet steel surface has the Ni-Cu-Ni coating of 0.12 ~ 0.17mm; Epoxy resin is perfused with between described magnet steel and magnet steel holddown groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520446343.0U CN204794616U (en) | 2015-06-26 | 2015-06-26 | Magnet steel is fixed towards piece and two poles of earth permanent magnetism motor of diving in step |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520446343.0U CN204794616U (en) | 2015-06-26 | 2015-06-26 | Magnet steel is fixed towards piece and two poles of earth permanent magnetism motor of diving in step |
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| Publication Number | Publication Date |
|---|---|
| CN204794616U true CN204794616U (en) | 2015-11-18 |
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| CN201520446343.0U Active CN204794616U (en) | 2015-06-26 | 2015-06-26 | Magnet steel is fixed towards piece and two poles of earth permanent magnetism motor of diving in step |
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| Country | Link |
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| CN (1) | CN204794616U (en) |
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- 2015-06-26 CN CN201520446343.0U patent/CN204794616U/en active Active
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