CN201209567Y - Low temperature-lifting energy-conserving total lift submersible pump - Google Patents

Abstract

The utility model relates to a low-temperature rise energy saving full lift submersible motor pump which comprises a motor, a water pump and an outer shell; the motor is arranged in the outer shell; the cylinder wall of the lower end of the outer shell is provided with a water inlet hole; the shell of the motor and the outer shell are made of metal sheets, and a circular groove is arranged between the shell of the motor and the outer shell; the water pump is arranged on the upper end of the outer shell, and consists of an upper pump type scroll, a pump cover, an end plate, an impeller, a scroll type guide vane, a shaft sleeve and a partition board which are subsequently arranged at the upper part of a motor shaft except the upper pump type scroll. Scroll type structures with quite large flow channel cross sectional area are adopted as the flow channels of the upper pump type scroll and the scroll type guide vane. The low-temperature rise energy saving full lift submersible motor pump is characterized by high efficiency, low reactive consumption, low temperature rise within the full lift, large overflow spacing in the use for waste water and waste pumps and strong solid passing capability, and is an integrated submersible motor pump combined with the functions of energy saving, low temperature rise and full lift.

Description

Low-temperature-rise energy-saving total-head electric diving pump

One, technical field

The utility model relates to a kind of low-temperature-rise energy-saving total-head electric diving pump, belongs to the pump technical field;

Two, background technique:

Submerged Motor Pumps is that pump and motor organically combine an integral body at one, mainly is divided into two kinds by the medium of being carried: the sewage dirt Submerged Motor Pumps and the small-sized diving electric pump (being commonly called as clean waterpump) of pumping clear water of pumping sewage dirt.

At present, the structure that the sewage dirt Submerged Motor Pumps of domestic production adopts be pump partly down, power motor is partly at last mode of structure, i.e. " lower suction type ", this mode of structure helps water is pumped.Because NBS need examine the sewage dirt Submerged Motor Pumps to pump the ability of solid matter, solid matter passing capacity just, therefore, the sewage dirt Submerged Motor Pumps generally all is to adopt single-stage pump, lift is lower, by related standard requirements (as JB5118-2001), no matter watt level, lift generally is no more than 40 meters, and what indivedual lifts were higher also is no more than 50 meters.The mode that it is single-stage pump that the pump of this structure partly adopts 1 volute to add 1 impeller realizes.Whole electric pump must be immersed in the water, and by the stationary water cooling, radiating effect is general, the running of can not dewatering; The pressure that bears because of mechanical seal is exactly the lift of being pumped, and therefore, mechanical seal is fragile.

At present, the small-sized diving electric pump of domestic production (being commonly called as clean waterpump) owing to do not examine the solid matter passing capacity, can adopt multistage pump, improves its lift, and the mode of structure that clean waterpump adopts generally has following several:

1) pump is down, and motor is at last mode of structure, i.e. " lower suction type ": for single-stage pump, the mode that adopts 1 volute to add 1 impeller realizes, for multistage pump,, adopts 1 volute to add n impeller and realize with (n-1) mode of individual stator according to what of progression n; Pump must be immersed in the water, and by the stationary water cooling, radiating effect is general, the running of can not dewatering; The pressure that bears because of mechanical seal is exactly the lift of being pumped, and therefore, mechanical seal is fragile, multistage pump particularly, and because of the lift height, mechanical seal is fragile especially.Because the pressure that mechanical seal can be born is 6-8kg, therefore, lift generally can not be above 60 meters.

2) pump is last, motor under mode of structure, promptly " go up the pump formula ": for single-stage pump, the mode that adopts 1 final stage stator to add 1 impeller realizes, for multistage pump,, adopts 1 final stage stator to add n impeller and realize with (n-1) mode of individual stator according to what of progression n; Pump must be immersed in the water, and by stationary water cooling, radiating effect is general, because of motor down, working order can not appear dewatering; Because of the pressure that mechanical seal is born, no matter how high lift is, is barometric pressure, and mechanical seal is not fragile, but water can not pump, to water base occasion that pumps being not suitable for using.

3) " in load the pump lower suction type " structure: had a lot of producers generally to adopt, this structure has two-layer housing---electric machine casing and frame, and motor and pump are in frame, motor is last, and pump is following, and current are wrapping motor casing and discharging, because of being the circulating water cooling, it is preferable to dispel the heat, and temperature rise is lower; The running of can dewatering, water also can pump; For single-stage pump, the mode that adopts 1 final stage stator to add 1 impeller realizes, for multistage pump, according to progression n what, adopts 1 final stage stator to add n impeller and realizes with (n-1) mode of individual stator; The pressure that bears because of mechanical seal is exactly the lift of being pumped, and mechanical seal is fragile, multistage pump particularly, and mechanical seal is fragile especially, because the pressure that mechanical seal can be born is 6-8kg, therefore, lift generally can not be above 60 meters.

4) " in load onto the pump lower suction type " structure: the deficiency that exists at above-mentioned three kinds of organization plans, the applicant improves this, and applied for Chinese patent " 200510003009.9; 200520006024.4; low-temperature-rise energy-saving submer-sible electric pump " in 2005, the organization plan of this Submerged Motor Pumps is: be provided with two-layer housing---electric machine casing and frame, all be that metal book plate is made, motor and pump are in frame, motor is following, and pump is last, and current are wrapping motor casing and discharging, because of being the circulating water cooling, motor casing is again that metal book plate is made, and it is splendid to dispel the heat, and temperature rise is very low; The running of can dewatering, water also can pump; For single-stage pump, the mode that adopts 1 final stage stator to add 1 impeller realizes, for multistage pump, according to progression n what, adopts 1 final stage stator to add n impeller and realizes with (n-1) mode of individual stator; No matter the many height of lift are barometric pressure to the pressure that bears because of mechanical seal, and mechanical seal is not fragile.

" in load onto the pump lower suction type " structure of this model utility original creation, not only can be used for small-sized diving electric pump, can also realize the multipolarity of sewage pump, reach the high-lift of sewage pump, but owing to be subjected to the influence of stator and this body structure of multi-stage impeller, the solid matter passing capacity is low, also not the high-lift sewage dirt pump of real meaning, only be regarded as " arranging husky Submerged Motor Pumps ".

In sum, there are the following problems for present small-sized diving electric pump and sewage dirt Submerged Motor Pumps:

1) when using lift to be lower than rated head, temperature rise will cause motor to damage above permitted value;

2) electric pump efficient is not high, wastes energy;

3) when using lift to be lower than the 85-90% of rated head when following, because of flow increases, motor overload may cause burn-down of electric motor.

4) weight is too heavy;

5) common sewage dirt Submerged Motor Pumps all adopts the lower suction type structure, has only single-stage pump, can not realize high-liftization of sewage dirt Submerged Motor Pumps;

6) though adopt the Submerged Motor Pumps of lower suction type structure water can be pumped, owing to be that the pressure that causes mechanical seal to bear increases along with increasing of lift from the bottom water inlet, the mechanical seal life-span reduces.When pressure surpassed 0.6kg, the mechanical seal meeting was too big because of the pressure that bears, and water burns motor to cause it to break into.

7) adopt the Submerged Motor Pumps of " in load the pump lower suction type " structure, though temperature rise is lower, the pressure that mechanical seal is born increases along with increasing of lift, and the mechanical seal life-span reduces.When pressure surpassed 0.6kg, the mechanical seal meeting was too big because of the pressure that bears, and water burns motor to cause it to break into.

8) adopt the sewage dirt Submerged Motor Pumps of " in load onto the pump lower suction type " structure, because of being subjected to the influence of stator and this body structure of multi-stage impeller, the solid matter passing capacity is low, also is not the high-lift sewage dirt pump of real meaning, only is regarded as " arranging husky Submerged Motor Pumps ".

Three, model utility content

The purpose of this utility model is to overcome the deficiency that exists in the above-mentioned technology, and a kind of new type low temperature rise energy-saving total-head electric diving pump is provided.

The utility model is in original application patent (200510003009.9,200520006024.4) the basis on, " go up pump formula volute " and " the voluted type stator " bigger with cross section of fluid channel replace " final stage stator " and " stator " respectively, solved the sewage dirt Submerged Motor Pumps solid matter passing capacity low problem of employing " in load onto the pump lower suction type " structure, high-lift with the sewage dirt Submerged Motor Pumps of realizing having big passing capacity; Simultaneously, further improved the pump efficiency of sewage dirt Submerged Motor Pumps and small-sized diving electric pump (being commonly called as clean waterpump).

For achieving the above object, concrete technological scheme of the present utility model is:

Described Submerged Motor Pumps comprises motor part, water pump part and frame, motor partly is installed in the frame, water pump partly is installed in the frame upper end, the water inlet is arranged on the barrel of frame lower end, electric machine casing and frame all adopt smooth metal book plate manufacturing, motor casing body thickness ≦ 1.2mm is provided with narrow annular channel between electric machine casing and the frame; Described water pump part is by last pump formula volute, pump cover and be enclosed in interior end plate, impeller, voluted type stator, axle sleeve, dividing plate by pump case and formed, except that last pump formula volute, above-mentioned each part is sleeved on the motor shaft successively, wherein pump cover is fixed on the water inlet joint that is connected with holder assembly on the bearing, and end plate is fixed on the pump cover, by pump cover seam location, first order impeller is arranged on the pump cover top, and be fixed on the motor shaft, and do not contact between the pump cover, leave the gap; The voluted type stator is installed above impeller, impeller is enclosed in the voluted type stator, with do not contact between the voluted type stator, leave the gap, be provided with axle sleeve, voluted type stator and dividing plate between per two impellers, dividing plate is arranged on the voluted type stator, back one-level impeller is installed on the dividing plate, also is fixed on the motor shaft, and axle sleeve is placed between two impellers on the motor shaft, make between back one-level impeller and the dividing plate not contact, leave the gap; Last pump formula volute is connected with the dividing plate of last level, and a last grade impeller is comprised in it, and does not contact between the impeller, leaves the gap.

The described runner of going up pump formula volute and voluted type stator all adopts the voluted type structure with big cross section of fluid channel.

The last pump formula volute side of described Submerged Motor Pumps sets out the mouth of a river, and is connected with water output connector, is provided with handle in last pump formula volute upper-end surface, and last pump formula volute, handle, dividing plate, voluted type stator, end plate are locked on the pump cover by bolt.

Described impeller adopts flat key to be connected with motor shaft.

Water pump in the described Submerged Motor Pumps partly can be single-stage or multistage.

Adopt the following advantage that the utlity model has of such scheme

1, adopt this new built-in type structure, because electric machine casing is book Hou Du ≦ 1.2mm very, circulating water stream is by the narrow annular channel between electric machine casing and the frame, being wrapped in whole electric machine casing discharges, the heat radiation of motor is fine, adopt " going up pump formula volute " to replace general " final stage stator " in addition, replace general " stator " with " voluted type stator ", improve efficient, reduced reactive loss, also just reduced heating, temperature rise further descends, therefore, in the total head scope temperature rise all very low, all can not surpass 90% of rated point temperature rise permitted value that NBS examines, greatly reduce electric machine temperature rise, improved the lift using scope of Submerged Motor Pumps;

2, adopt more smooth metal book plate to make electric machine casing and frame, because of flow path wall is smooth, greatly reduce the surface friction drag of current, improved electric pump efficient, electric pump efficient can improve more than 10%;

3, replace general " final stage stator " with " going up pump formula volute ", replace general " stator " with " voluted type stator ", can further improve electric pump efficient, be used for the solid matter passing capacity that the sewage dirt Submerged Motor Pumps also can improve the sewage dirt Submerged Motor Pumps;

4, no matter how high lift reach, and the pressure that its mechanical seal is born is barometric pressure, so its mechanical seal is not fragile;

5, complete machine is in light weight, compares with the conventional pump of same model, only reaches conventional pump 1/3～1/2 weight of same model.

The model machine (belonging to the sewage dirt Submerged Motor Pumps) that adopts the technical solution of the utility model to produce, through entrust Ministry of Agriculture water pump quality inspection center detect (report number: No.S2007015), result who draws such as following table:

Sequence number	Index	Reference value	Measured value	Remarks
					1	Rated head m	≥28.4	31.51	With the NBS ratio
2	Rated flow t	18	25	With the NBS ratio
					3	Rated point temperature rise K	≤80	31.97	With the NBS ratio
4	Any lift point maximum temperature rise K	≤80	32.83	The NBS failed call
					5	Rated power kw	5.5	5.5	With the NBS ratio
6	The electric pump efficiency eta	33.23％	38.36％	With the NBS ratio
					7	The rated point electric current I	11	9.2	With the design load ratio
8	Any lift point maximum current I	13.2	10.34	The NBS failed call
					9	Power factor	≥0.86	0.8998	With the NBS ratio
10	Solid matter passing capacity mm	20	22	With the NBS ratio
					11	Weight kg	90	38	With the conventional pump ratio

Four, description of drawings

Fig. 1 is the utility model structural representation

Among the figure: the last pump formula of 1-volute, the supporting of 2-axle head, the 3-flat key, the 4-handle, the 5-hexagon head bolt, the 6-impeller, the 7-O RunddichtringO, the 8-pump case, the 9-impeller, the 10-motor shaft, the 11-screw, holder assembly on the 12-bearing, the 13-O RunddichtringO, the 14-lining, the 15-electric machine casing, the 17-stator, the 18-frame, the 19-bearing cap, the 20-elastic cable paper, the 21-bearing base, 22-outlet nut assembly, the 23-bearing, the 24-bearing, the 25-Lower shaft sleeve, the 26-bottom, the 27-O RunddichtringO, the 28-screw, the 29-bearing base, the 30-screw, the 31-screw, the 32-nut, the 33-stud bolt, the 34-screw, the 35-rotor iron core, the 36-bearing, the 37-double mechanical seal, the 38-inner frame revolves a lip seal, the 39-O RunddichtringO, the 40-joint of intaking, the 41-screw, the 42-pump cover, the 43-O RunddichtringO, the 44-end plate, the 45-O RunddichtringO, the 46-O RunddichtringO, 47-voluted type stator, the 48-axle sleeve, the 49-O RunddichtringO, the 50-dividing plate, the 51-water output connector, the 52-shaft end nut, the 53-floor clip.

Five, embodiment

Below in conjunction with accompanying drawing the utility model is elaborated:

As shown in Figure 1, Submerged Motor Pumps described in the utility model comprises the motor part, water pump part and frame 18, the motor part is mainly by holder assembly on the bearing 12, motor shaft 10, stator 17, rotor iron core 35, bearing base 29, compositions such as bearing base 21 and electric machine casing 15, and be contained in the frame 18, be provided with narrow annular channel between electric machine casing 15 and the frame 18, motor section is placed in the frame 18, water pump partly places frame 18 outer upper-end surfaces, the water pump part partly is connected as a whole by water inlet joint 40 with motor, electric machine casing 15 and frame 18 all adopt smooth sheetmetal to make, wherein electric machine casing 15 Bi Hou ≦ 1.2mm.

Frame 18 bottom barrels are provided with the water inlet, and frame is provided with bottom 26 outside 18 lower ends, are provided with screw 28, O RunddichtringO 27 in bottom 26 bottoms, and electric pump elastic cable paper 20 is drawn by outlet nut assembly 22 from above-mentioned bearing base 29 lateral aperture.

Lower end in the electric machine casing 15 is provided with bearing base 21, its simultaneously again in bearing base 29 above, be provided with bearing 23, bearing 24 in the bearing base 21, this two bearings is assemblied in the lower end of motor shaft 10 simultaneously again, the Lower shaft sleeve 25 that is enclosed within on the axle is arranged between this two bearings, on bearing 23, be provided with bearing cap 19; Electric machine casing 15 inwalls also are provided with lining 14, stator 17, and holder assembly 12 on the bearing is arranged outside electric machine casing 15 upper ends, are provided with bearing 36 on the bearing in the holder assembly 12, and this bearing is positioned on the motor shaft 10 simultaneously; Holder assembly 12 is equipped with O RunddichtringO 13 with electric machine casing 15 joints on the described bearing, holder assembly 12, electric machine casing 15 and bearing base 29 on the bearing, link to each other by nut 32 and stud bolt 33, bearing base 29 is fixedlyed connected with bottom 26, is fixedlyed connected with bearing base 21 by screw 31 by screw 30; Water inlet joint 40 is on holder assembly on the bearing 12, link to each other by screw 11,39 sealings of O RunddichtringO are arranged between the two, and form enclosed space, be provided with the lubricant oil of double mechanical seal 37 and lubricating mechanical sealing in this enclosed space, mechanical seal 37 also is enclosed within on the motor shaft 10 simultaneously; Between water inlet joint 40 and the motor shaft 10 inner frame is housed and revolves a lip seal 38.

The water pump part mainly reaches the end plate 44, impeller, voluted type stator 47, axle sleeve 48, the dividing plate 50 that are surrounded by pump case 8 by pump cover 42 and last pump formula volute 1 and is formed, except that last pump formula volute 1, all be sleeved on the motor shaft 10, wherein pump cover 42 is fixed on the water inlet joint 40 that is connected with holder assembly 12 on the bearing by screw 41, pump cover 42 stop portions are equipped with O RunddichtringO 46, end plate 44 is contained on the pump cover 42, and its outer O type circle that is with seals 45; Pump in the utility model can be set to single-stage or multistage, embodiment as shown in the figure is a two stage pump, corresponding just have a both stage impellers, first order impeller 9 is above pump cover 42, be sleeved on the motor shaft 10, be connected with motor shaft 10 by flat key 3, and and pump cover 42 between form the gap, be not in contact with it; End plate 44 is provided with voluted type stator 47, first order impeller 9 just in voluted type stator 47, and and voluted type stator 47 between form the gap, any contact do not arranged with voluted type stator 47; Voluted type stator 47 is provided with dividing plate 50, second level impeller 6 is just on dividing plate 50, between two impellers, be provided with axle sleeve 48, axle sleeve 48 is placed on the motor shaft 10, play restriction second level impeller 6 axial positions, make between itself and the dividing plate 50 and form the gap, and any contact do not arranged with dividing plate 50; Dividing plate 50 is provided with pump formula volute 1, last 1 while of pump formula volute also above pump case 8, places second level impeller 6 in it, by the location of the seam on the dividing plate 50, make between itself and the second level impeller 6 and form the gap, and any contact do not arranged with second level impeller 6.Above second level impeller 6, in the upper end of motor shaft 10, be provided with floor clip 53 and shaft end nut 52, this shaft end nut 52 is a left hand thread, and each impeller is locked on the motor shaft 10 by axle sleeve 48.Last pump formula volute 1 is provided with a plurality of bolts 5, will go up pump formula volute 1, handle 4, dividing plate 50, voluted type stator 47, end plate 44 and be locked on the pump cover 42.

Be provided with axle head supporting 2 in last pump formula volute 1, be used for the supporting motor axle head, the side is provided with a water outlet that makes progress simultaneously, and is connected with water output connector 51.

The described runner of going up pump formula volute 1 and voluted type stator 47 all adopts the voluted type structure with big cross section of fluid channel, and its efficient is higher than general " final stage stator " and " stator ".

For guaranteeing the electric pump sealability, be respectively equipped with O RunddichtringO 7,49,43 at dividing plate 50 cylindricals and stop portion, pump cover 42 cylindricals.

During use, elastic cable paper 20 is connected power supply, electric pump is started working, the current of pumping water inlet from the frame 18 lower end barrels enters, by the narrow annular channel between electric machine casing 15 and the frame 18, be delivered to into water joint 40, because of motor shaft 10 impeller 6 and 9 high speed rotating, form negative pressure in first order impeller 9 water inlets, in water intake impeller 9,, form high-pressure water flow by impeller 6 and 9 and voluted type stator 47 and go up more than 1 pressurization of pump formula volute, discharge by water output connector 51, reach the purpose that current is transported to eminence.

Submerged Motor Pumps reaches " stator " because of " the not level stator " that adopts " going up pump formula volute " and " voluted type stator " to replace general pump generally to adopt respectively, all adopt voluted type structure with big cross section of fluid channel because of last pump formula volute and voluted type stator, it is big to cross ebb interval, the efficient height, the solid matter passing capacity is strong.Because of the efficient height, reactive loss reduces, and has also just reduced heating, reduced temperature rise, therefore, temperature rise is all very low in the total head scope, all can not surpass the rated point temperature rise that NBS examines permitted value 90%, greatly reduce electric machine temperature rise, improved the lift using scope of Submerged Motor Pumps.

It is clean waterpump, sewage dirt Submerged Motor Pumps, built-in submerged motor pump, deep-well Submerged Motor Pumps, mining Submerged Motor Pumps, single-stage pump, multistage pump, centrifugal pump, screw pump, fire water pump etc. that the utility model can be used as small-sized diving electric pump.

Present embodiment only is among all embodiments of this patent; be not that this patent is done any pro forma restriction; any technological scheme content that does not break away from this patent; to any change, equivalent variations and modification that above embodiment did, all still belong to this patent protection domain according to the technical spirit of this patent.

Claims (9)

1, a kind of low-temperature-rise energy-saving total-head electric diving pump, this electric pump comprises the motor part, water pump part and frame (18), motor partly is installed in the frame (18), water pump partly is positioned at frame (18) upper end, the water inlet is arranged on the barrel of frame (18) lower end, be provided with narrow annular channel between electric machine casing (15) and the frame (18), it is the passage of current, it is characterized in that: described water pump part is by pump cover (42), last pump formula volute (1) and the end plate (44) that is surrounded by pump case (8), impeller (6), impeller (9), voluted type stator (47), axle sleeve (48), dividing plate (50) is formed, except that last pump formula volute (1), above-mentioned each part is sleeved on the motor shaft (10) successively, wherein pump cover (42) is fixed on the water inlet joint (40) that is connected with holder assembly (12) on the bearing, first order impeller (9) is arranged on pump cover (42) top, suit also is fixed on the motor shaft (10), with do not contact between the pump cover (42), leave the gap; End plate (44) is enclosed within outside the impeller (9) and contacts with pump cover (42) top, voluted type stator (47) is installed in end plate (44) top, impeller (9) is in voluted type stator (47), with do not contact between the voluted type stator (47), leave the gap, be provided with axle sleeve (48) between per two impellers, voluted type stator (47) and dividing plate (50), dividing plate (50) is arranged on the voluted type stator (47), back one-level impeller is installed on the dividing plate (50), axle sleeve (48) is placed on the motor shaft between two impellers (10), make between back one-level impeller and the dividing plate (50) not contact, leave the gap; Last pump formula volute (1) is connected with the dividing plate (50) of last level, and a last grade impeller is comprised in it, and does not contact between the impeller, leaves the gap.

2, low-temperature-rise energy-saving total-head electric diving pump according to claim 1 is characterized in that: the described runner of going up pump formula volute (1) and voluted type stator (47) all adopts the voluted type structure with big cross section of fluid channel.

3, low-temperature-rise energy-saving total-head electric diving pump according to claim 1 is characterized in that: electric machine casing (15) all adopts smooth metal book plate manufacturing, electric machine casing (15) Bi Hou ≦ 1.2mm with frame (18).

4, low-temperature-rise energy-saving total-head electric diving pump according to claim 1 is characterized in that: last pump formula volute (1) side of described Submerged Motor Pumps sets out the mouth of a river, and is connected with water output connector (51).

5, low-temperature-rise energy-saving total-head electric diving pump according to claim 1 is characterized in that: described impeller adopts flat key (3) to be connected with motor shaft.

6, low-temperature-rise energy-saving total-head electric diving pump according to claim 1 is characterized in that: the water pump in the described Submerged Motor Pumps partly can be single-stage or multistage.

7, low-temperature-rise energy-saving total-head electric diving pump according to claim 1, it is characterized in that: the last axle head of described motor shaft (10), be provided with floor clip (53) and shaft end nut (52), this shaft end nut (52) is a left hand thread, each impeller is locked on the motor shaft (10) by axle sleeve (48)

8, low-temperature-rise energy-saving total-head electric diving pump according to claim 1, it is characterized in that: this Submerged Motor Pumps upper end is provided with handle (4), and last pump formula volute (1), handle (4), dividing plate (50), voluted type stator (47), end plate (44) are locked on the pump cover (42) by bolt (5).

9, low-temperature-rise energy-saving total-head electric diving pump according to claim 1, it is characterized in that: described pump cover (42) stop portion is equipped with O RunddichtringO (46), end plate (44) is outer to be with O type circle sealing (45), is respectively equipped with O RunddichtringO (7,49,43) at dividing plate (50) cylindrical and stop portion, pump cover (42) cylindrical.

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