CN203272158U

CN203272158U - Downdraft submersible electric pump

Info

Publication number: CN203272158U
Application number: CN 201320294806
Authority: CN
Inventors: 宋飞; 胡薇; 单丽; 温旭; 张解
Original assignee: Hefei Hengda Jianghai Pump Co Ltd
Current assignee: Hefei Hengda Jianghai Pump Co Ltd
Priority date: 2013-05-28
Filing date: 2013-05-28
Publication date: 2013-11-06
Anticipated expiration: 2023-05-28

Abstract

The utility model relates to a downdraft submersible electric pump which comprises a sinking pump and a submersible motor which are coaxial. The downdraft submersible electric pump is of a lower-motor upper-pump structure. A rotor shaft of the motor extends to the outer portion of a sucking cover, a guide vane tube and an impeller are arranged on the extending rotor shaft in a sleeved mode, and the impeller is placed below the guide vane tube. The guide vane tube is of an inverted cone frustum shape and comprises a clamping tube formed by an inner tube and an outer tube, more than three guide vans are connected in a cavity between the inner tube and the outer tube in an evenly-distributed mode, the large diameter end of the inner tube is connected with the lower end of a lower guide bearing seat of the submersible electric pump, the large diameter end of the outer tube is connected with the lower end of the sucking cover, the small diameter end of the inner tube is connected with a sealing seat, and the guide vane tube does not rotate along with the rotor shaft. The small diameter end of the outer tube of the guide vane tube is connected with the small diameter end of an impeller outer shell which is of a horn shape, the small diameter side of the impeller outer shell is arranged outside the impeller in a covering mode, and the large diameter end of the impeller outer shell is connected with a base. The base is of a hollow-out shape. The eventual residual water level of the downdraft submersible electric pump is only 0.5-1 meter, a booster pump is of no need, and using cost is lowered.

Description

The lower suction type Submerged Motor Pumps

Technical field

The utility model belongs to the Submerged Motor Pumps technical field, complex ore draining lower suction type Submerged Motor Pumps after being specifically related to the forced-ventilated water of mine production and flooding well.

Background technique

At present, the forced-ventilated water that the mine produces and flood well after complex ore draining great majority be all to adopt pump formula Submerged Motor Pumps (Fig. 6) on the lower machine of vertical installation, both submersible motor below, submersible pump is up.On motor,, there is very high height at the suction port dried up end due to pump intake, causes it to have residuary waters degree of depth problem, i.e. a thoroughly draining.Only have in actual use depth of water talent in below 1 meter can followingly carry out various operations to the bottom, pump formula Submerged Motor Pumps on the lower machine of present vertical installation, particularly under large-scale double suction on machine the residuary waters degree of depth of pump formula Submerged Motor Pumps generally many at 5-10 rice, can not satisfy user's demand.The way of head it off: below pump formula Submerged Motor Pumps on lower machine with a little booster pump, when depth of water Submerged Motor Pumps to certain the time is inoperable, just begin to start little booster pump, utilize booster pump to draw water to Submerged Motor Pumps, then Submerged Motor Pumps continues to fetch water to the destination again.But this solution has 3 deficiencys: (1) needs to increase a booster pump, so cost of production will rise; (2) electric pressure of large-scale electric underwater pump is generally all 6/10kV, and the electric pressure of booster pump is all generally 380/660V, thus need the user to prepare two cover power-supply system and control system, thus increased user's user cost; (3) when booster pump and Submerged Motor Pumps are worked simultaneously, can't work if booster pump breaks down suddenly, will cause so the damage of Submerged Motor Pumps, thereby bring larger loss for the user.

The model utility content

In order to solve the problem of above-mentioned three aspects that on existing lower machine, pump formula Submerged Motor Pumps exists, the utility model provides a kind of lower suction type Submerged Motor Pumps that improves structure.

The lower suction type Submerged Motor Pumps comprises coaxial submersible pump and submersible motor, and is pump structure on lower machine; The outer cover of submersible pump and submersible motor is provided with suction hood, and the electric pump water inlet is positioned at the top of submersible pump; The rotor shaft of motor extends the suction hood outside, is arranged with stator cylinder and impeller on overhanging rotor shaft, and impeller is positioned at stator cylinder below, and impeller is connecting rotor shaft by key, and rotates with rotor shaft; The stator cylinder is the rounding cone table shape, comprise the clamp that is formed by inner and outer tubes, the uniform stator that is connecting more than three in cavity between inner and outer tubes, the larger diameter end of inner tube and the larger diameter end of outer tube are flange end, the larger diameter end of inner tube is connecting the lower leading axle bearing lower end of submersible motor, and the larger diameter end of outer tube is connecting the lower end of suction hood, and the smaller diameter end of inner tube is connecting sealing seat, sealed socket sleeve is located on the rotor shaft of motor, and the stator cylinder does not rotate with rotor shaft; The smaller diameter end of the outer tube of stator cylinder is connecting the smaller diameter end of impeller housing, and it is horn-like that impeller housing is, and its minor diameter one side is located at the outside of impeller, and its larger diameter end is connecting an axial end of base; Base is cylindrical tube shape, and the sidewall of base and the axial the other end are Openworks shape.

Uniformly between the inner and outer tubes of stator cylinder connecting six stators.

The axial middle part of impeller housing is the trunnion of smooth transition, and throat pipe diameter is less than the diameter at the axial two ends of impeller housing; The outside of impeller housing is all laid stiffening rib vertically.

The sidewall of base is the grid-like of hollow out, and the axial the other end of base is the palisade shape of hollow out.Useful technique effect of the present utility model embodies in the following areas:

1. the utility model lower suction type Submerged Motor Pumps final residue water level only has 0.5～1 meter, can complete the demand that satisfies the user;

2. the utility model lower suction type Submerged Motor Pumps does not need to use booster pump, has reduced cost, and the user do not need standby two cover power-supply system and control system again, thereby has reduced user's user cost; On the other hand, can not damage Submerged Motor Pumps because of the fault of booster pump, lack a fault point, thereby increase the Security of Submerged Motor Pumps.

Description of drawings

Fig. 1 is the utility model lower suction type Submerged Motor Pumps structural representation.

Fig. 2 is the I place enlarged view of Fig. 1.

Fig. 3 is stator barrel structure schematic diagram.

Fig. 4 is the understructure schematic diagram.

Fig. 5 is the impeller housing schematic diagram.

Fig. 6 is pump formula Submerged Motor Pumps structural representation on common lower machine.

Sequence number in upper figure: 1 electric pump water inlet, 2 submersible pumps, 3 stator cylinders, 4 mechanical seals, 5 sealing seats, 6 bases, 7 lower suction type Submerged Motor Pumps lowest working water levels, 8 impeller housings, 9 impellers, 10 rotary shaft lip seals, 15 suction hoods, 16 submersible motors, 17 outer tubes, 18 inner tubes.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further described by example.

Referring to Fig. 1, the lower suction type Submerged Motor Pumps comprises coaxial submersible pump 2 and submersible motor 16, and is pump structure on lower machine, and wherein submersible motor 16 is two shaft submersible motors; The outer cover of submersible pump 2 and submersible motor 16 is equipped with suction hood 15, and electric pump water inlet 1 is positioned at the top of submersible pump 2.Referring to Fig. 1, the rotor shaft of motor extends suction hood 15 outsides, is set with stator cylinder 3 and impeller 9 on overhanging rotor shaft, and impeller 9 is positioned at stator cylinder 3 belows, and impeller 9 is connecting rotor shaft by key, and rotates with rotor shaft.as seen from Figure 3, stator cylinder 3 is the rounding cone table shape, comprise the clamp that is formed by inner tube 18 and outer tube 17, interior uniform six stators that connecting of cavity between inner tube 18 and outer tube 17, the larger diameter end of inner tube 18 and the larger diameter end of outer tube are flange end, the larger diameter end of inner tube 18 is connecting the lower leading axle bearing lower end of submersible motor 16, the larger diameter end of outer tube 17 is connecting the lower end of suction hood 15, the smaller diameter end of inner tube 18 is connecting sealing seat 5, sealing seat 5 is set on the rotor shaft of motor, be separately installed with mechanical seal 4 and rotary shaft lip seal 10 between sealing seat 5 and rotor shaft, stator cylinder 3 does not rotate with rotor shaft, the smaller diameter end of the outer tube 17 of stator cylinder 3 is connecting the smaller diameter end of impeller housing 8, and impeller housing 8 is horn-like, and its minor diameter one side is located at the outside of impeller 9, and its larger diameter end is connecting an axial end of base 6, as seen from Figure 5, the axial middle part of impeller housing 8 is the trunnion of smooth transition, and throat pipe diameter is less than the diameter at impeller housing 8 axial two ends, and the outside of impeller housing 8 is all laid stiffening rib vertically.Base 6 is cylindrical tube shape, and the sidewall of base is the grid-like of hollow out, and the axial the other end of base 6 is the palisade shape of hollow out, sees Fig. 4.

Working principle of the present utility model is as follows: during higher than electric pump water inlet 1, the normal pump water conservancy project of the utility model is done when water level.When water level is positioned at the electric pump water inlet below 1, when lower suction type Submerged Motor Pumps lowest working water level 7 is above, under the effect of impeller 9, clamp and interlayer submersible pump 2, submersible motor 16 and suction hood 15 between arrival electric pump water inlet 1 place of water by stator cylinder 3, the utility model can work on, until water level arrives lower suction type Submerged Motor Pumps lowest working water level 7 shown in Figure 1, the residuary waters degree of depth at lower suction type Submerged Motor Pumps lowest working water level 7 places is below 1 meter.

Claims

1. the lower suction type Submerged Motor Pumps, comprise coaxial submersible pump and submersible motor, and be pump structure on lower machine; The outer cover of submersible pump and submersible motor is provided with suction hood, the electric pump water inlet is positioned at the top of submersible pump, it is characterized in that: the rotor shaft of motor extends the suction hood outside, be arranged with stator cylinder and impeller on overhanging rotor shaft, impeller is positioned at below the stator cylinder, impeller is connecting rotor shaft by key, and rotates with rotor shaft; The stator cylinder is the rounding cone table shape, comprise the clamp that is formed by inner and outer tubes, the uniform stator that is connecting more than three in cavity between inner and outer tubes, the larger diameter end of inner tube and the larger diameter end of outer tube are flange end, the larger diameter end of inner tube is connecting the lower leading axle bearing lower end of submersible motor, and the larger diameter end of outer tube is connecting the lower end of suction hood, and the smaller diameter end of inner tube is connecting sealing seat, sealed socket sleeve is located on the rotor shaft of motor, and the stator cylinder does not rotate with rotor shaft; The smaller diameter end of the outer tube of stator cylinder is connecting the smaller diameter end of impeller housing, and it is horn-like that impeller housing is, and its minor diameter one side is located at the outside of impeller, and its larger diameter end is connecting an axial end of base; Base is cylindrical tube shape, and the sidewall of base and the axial the other end are Openworks shape.

2. lower suction type Submerged Motor Pumps according to claim 1 is characterized in that: uniformly between the inner and outer tubes of stator cylinder connecting six stators.

3. lower suction type Submerged Motor Pumps according to claim 1, it is characterized in that: the axial middle part of impeller housing is the trunnion of smooth transition, and throat pipe diameter is less than the diameter at the axial two ends of impeller housing; The outside of impeller housing is all laid stiffening rib vertically.

4. lower suction type Submerged Motor Pumps according to claim 1, it is characterized in that: the sidewall of base is the grid-like of hollow out, the axial the other end of base is the palisade shape of hollow out.