CN2246722Y

CN2246722Y - Internal cooling high-lift downdraft pump

Info

Publication number: CN2246722Y
Application number: CN 95207957
Authority: CN
Inventors: 龙云乾
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-04-22
Filing date: 1995-04-22
Publication date: 1997-02-05
Anticipated expiration: 2005-04-22

Abstract

The utility model relates to an internal cooling high-lift downdraft pump. A water filling wet motor is used, the motor is provided with a metal respirator with the cavity of the motor and the cavity of a casing are communicated, and the metal respirator has the filtering function, so water can enter the inner part of the motor and play roles in cooling and lubricating bearings. A water jacket used as a water flow channel is arranged between the motor and the casing, so the motor can be cooled fully. The utility model has the advantages of long service life, high efficiency, high delivery lift, simple structure and low cost.

Description

The high-lift downdraft pump of inner-cooled

The utility model belongs to a kind of lower suction type submersible pump.

Existing lower suction type submersible pump adopts the motor of dry type machinery oil sealing more, this submersible pump machinery oil sealing easy break-down, in case seal failure, motor will be damaged because of watered and wetting, and complicated integral structure, the cost height, inner ball bearing needs regularly to clean to change oil, particularly its motor cooling is insufficient, and when water pump was in the operating mode operation of not diving under water, motor is very easy to be burnt.

The utility model aim to provide a kind of simple in structure, volume is little, self cooling performance is good, the life-span is long, lift is high lower suction type submersible pump.

For achieving the above object, the utility model adopts following structure (describing in conjunction with Fig. 1 embodiment): it comprises the motor 18 that is contained in the housing 15 of bringing the mouth of a river 3 and water outlet 34 into, the impeller that links with motor coaxle, guide wheel, it is characterized in that, described water intake 3 is located at lower housing portion, water outlet 34 is located at housing top, motor is fixed on housing inner chamber top, motor shaft 26 outputs are towards housing inner chamber bottom and several grades of coaxial the linking of impeller, described motor 18 is the water-filling wet type electric motor, its top is equipped with motor cavity is communicated with the housing inner chamber, and has a metal resuscitation apparatus 23 of filtering function, output shaft position, its underpart is provided with the oil sealing 33 with motor cavity and the isolation of housing inner chamber, be provided with certain interval between motor sidewall and the housing, formation can be used as the tubular annular water jacket 14 of flow channel, certain interval is also established with the case top of taking the mouth of a river out of in the motor top, and motor shaft position and lower end is equipped with guide bearing and the thrust bearing that available water is lubricated respectively 26 about.

The utility model working principle is: the wheel rotation that drives the bottom during motor rotation, from lower housing portion water intake inspiration water, the water outlet that is routed to case top through the water jacket between motor and the housing is gone out, the clear water that wet type electric motor running Central Plains is injected reduces if leak the water yield from the bottom oil sealing, then the water in the water jacket promptly can enter motor internal after filtration by resuscitation apparatus, play the cooling motor effect on the one hand, on the one hand to the bearing lubricate, when the water expanded by heating of motor internal, can outwards release by resuscitation apparatus again, press in reducing, the resuscitation apparatus here can play the effect of the inner water yield of self-regulation motor.

The utility model adopts the water-filling wet type electric motor to form the inner-cooled submersible pump, do not need the existing the sort of complex structure of submersible pump dry type motor, demanding mechanical oil sealing, but also the water cooling motor that can utilize motor internal to inject, lubricating bearings, water jacket between motor and the housing forms water-flowing path from bottom to top on the one hand, can take away the heat that produces in the machine operation on the one hand, motor is played the effect of abundant cooling, even can't immerse in the water at the shallow table water of submersible pump suction operation face, and be in the rugged environment of improper ventilation, the water that the bottom sucks also can play good cooling action to motor, guarantees its long proper functioning.Because the utility model adopts the guide bearing and the thrust bearing of water lubrication, axial carrying capacity is big, and it is strong to add self refrigerating function again, so can improve lift.This submersible pump long service life, efficient height, the lift height, simple in structure, cost is low.

Description of drawings:

Fig. 1, the utility model example structure schematic representation

1, base 2, water strainer 3, water intake 4, following pump case

5, lower tumbler 6, following impeller 7, middle pump case 8, bolt

9, middle impeller 10, middle guide wheel 11, last pump case 12, last impeller

13, upper block 14, water jacket 15, housing 16, stator

17, rotor 18, motor assembly 19, loam cake 20, sealing cover

21, lifting bolt 22, guide shaft bearing 23, resuscitation apparatus 24, top guide bearing

25, water passage hole 26, motor shaft 27, coil 28, lower guide bearing

29, water passage hole 30, thrust bearing 31, thrust shaft block

32, stainless steel square position 33, oil sealing 34, water outlet 35, screw

Embodiment: present embodiment is fixed on top with wet type water-filling motor 18 water outlet 34, the bottom has the enclosing housing 15 inner chamber tops of water intake 3 also and between the housing to keep certain interval, formation can be as the water jacket 14 of flow channel, motor shaft 26 outputs are connected with last impeller 12 parallel to each other towards housing inner chamber lower shaft, middle impeller 9, following impeller 6, three grades of impellers are respectively equipped with upper block 13, middle guide wheel 10 and lower tumbler 5, the guide shaft bearing 22 that cooperates with guide bearing is equipped with at the motor top, the guide bearing that the position is adorned respectively about the motor shaft is the guide bearing 24 of Cuprum alloy, 28, have the recessed spiral chute of screw perforation up and down on the guide bearing, resuscitation apparatus 23 is positioned on the guide shaft bearing and communicates with the spiral notch opened on the top guide bearing 24, the motor shaft lower end is provided with the thrust bearing 30 that employing insulating varnish carbon one graphite bearing that cooperates with thrust shaft block 31 and stainless steel square position 32 are formed, thrust shaft block is provided with oil sealing 33, and water intake 3 is equipped with water strainer 2.

Water during the work of this submersible pump in the chuck can enter motor internal through the recessed spiral chute on the top guide bearing 24 from resuscitation apparatus, and recessed spiral chute also is for making current at the motor internal up/down perforation on the lower guide bearing 28.

Lower guide bearing can obtain the sufficient lubrication of water and can make water pump operation steadily reliable on the Cuprum alloy of adorning on this routine motor shaft, having overcome the dry type motor needs regularly cleaning to change oil and move jiggly deficiency because of using ball bearing, the thrust bearing of being made up of graphite and stainless steel square position is under the sufficient lubrication of water, friction ractor is very little, has improved the working efficiency and the axial carrying capacity of motor.

This example is established three grades of impellers and has not only been improved pump head, and can dwindle the water pump radial dimension.

Claims

1, the high-lift downdraft pump of inner-cooled, comprise the motor (18) that is contained in the housing (15) of bringing the mouth of a river (3) and water outlet (34) into, the impeller that links with motor coaxle, guide wheel, it is characterized in that, described water intake (3) is located at lower housing portion, water outlet (34) is on housing top, motor is fixed on housing inner chamber top, motor shaft (26) output is towards housing inner chamber bottom and several grades of coaxial the linking of described impeller, described motor (18) is the water-filling wet type electric motor, its top is equipped with motor cavity is communicated with the housing inner chamber, and has a metal resuscitation apparatus (23) of filtering function, output shaft position, its underpart is provided with the oil sealing (33) with motor cavity and the isolation of housing inner chamber, be provided with certain interval between motor sidewall and the housing, formation can be as the tubular annular water jacket (14) of water-flowing path, certain interval is also established with the case top of taking the mouth of a river out of in the motor top, and motor shaft (26) position and lower end up and down is equipped with available water lubricated guide bearing and thrust bearing respectively.

2, the high-lift downdraft pump of inner-cooled according to claim 1, it is characterized in that: the guide shaft bearing (22) that cooperates with described guide bearing is equipped with at described motor top, the guide bearing that the position is adorned respectively about the described motor shaft is the guide bearing (24) of Cuprum alloy, (28), have the recessed spiral chute of screw perforation up and down on the guide bearing, the guide shaft bearing (22) that is positioned on described resuscitation apparatus (23) goes up and communicates with the spiral notch opened on the top guide bearing, the thrust bearing (30) that cooperates with thrust shaft block (31) that establish described motor shaft lower end is made up of insulating varnish carbon-graphite bearing and stainless steel square position (32), and thrust shaft block is provided with described oil sealing (33).