CN202833204U

CN202833204U - Submerging pump

Info

Publication number: CN202833204U
Application number: CN201220448461.1U
Authority: CN
Inventors: 王准; 丁恒利; 邵必勇; 黄华昌
Original assignee: Shanghai Kaiquan Pump Group Co Ltd
Current assignee: Shanghai Kaiquan Pump Group Co Ltd
Priority date: 2012-09-04
Filing date: 2012-09-04
Publication date: 2013-03-27
Anticipated expiration: 2022-09-04

Abstract

The utility model discloses a submerging pump which comprises a pump body, an impeller and a motor. The pump body is composed of an upper portion, a middle portion and a lower portion, a vortex opening is arranged in the upper end of the pump body, the motor, a motor base, an adjusting device and a base are from top to bottom sequentially arranged at the lower portion of the pump body, the motor is arranged on the motor base, the motor base is fixed on the base, the adjusting device is arranged between the motor base and the base. The submerging pump further comprises a thrust bearing which is installed on a bearing rack, the thrust bearing encircles a pump shaft and is arranged at the middle portion of the pump body to bear axial force and increase rigidity of the pump shaft. For the pump body with large flux and head of delivery and under the condition of the long pump shaft, the submerging pump has the advantages of effectively reducing vibration amplitude of the pump shaft, increasing the rigidity of the whole pump shaft, conveniently increasing motor capacity of a water pump to improve the flux and the head of delivery, and thereby overall improving efficiency of the water pump, prolonging service life of parts and device maintenance period and saving money for whole project investment.

Description

A kind of submersible pump

Technical field

The utility model relates to a kind of submersible pump, and this submersible pump is arranged on pump housing bottom with motor, and thrust-bearing is arranged on pump housing middle part, and is provided with the bearing for the axis body vibration damping on the motor shaft.

Background technique

Existing underwell pump and underground cavern are all higher to flow and the lift requirement of pump with submersible pump, this power of motor that requires submersible pump to be equipped with also must increase, especially for multistage pump, the requirement of power and the installation of multi-stage impeller all can make the length of the pump housing and pump shaft increase thereupon.

When powerful motor device running, the Oscillation Amplitude of pump shaft is also larger, and amplitude not only can make the pump shaft wearing and tearing, also can make motor stator and mutually mutual friction of rotor, causes rotor output uneven, causes the output power loss, and then affects the water pump whole efficiency; Generation of vibration axially and power radially can cause pump shaft and on every side parts generate heat because of friction, especially for bearing part, excess Temperature can make the bearing sharp wear;

Moreover the vibration that continues can make submersible pump basis vibration-generating, cause the soil rigidity variation, and fang bolt is loosening; These reasons all can make the maintenance period of equipment shorten.Because the running environment of submersible pump, its installation and removal are all relatively more difficult, the short operating cost that has greatly increased whole project that means of maintenance period.

The Oscillation Amplitude of existing submersible pump axis body when reducing pump operation, some submersible pumps will be installed in motor bottom be used to the thrust-bearing that bears axial force, although but this pump body structure has reduced the amplitude of whole pump shaft lower end, but the amplitude of pump shaft upper end is still bigger than normal, and the rigidity of pump shaft integral body is not enough; Moreover, thrust-bearing is carrying larger axial force in submersible pump, the miscellaneous part degree of wear is higher relatively, belongs to easy-abrasion part, its frequency of maintenance is also relatively high, the position of thrust-bearing is arranged on motor bottom undoubtedly its installation and maintenance is caused very large difficulty.

The model utility content

The purpose of this utility model is to provide a kind of pump shaft good rigidly and the little submersible pump of Oscillation Amplitude for the problem of above-mentioned submersible pump existence, is particularly useful for the large flow of down-hole, underground cavern, high-lift medium transport; Motor is installed in pump housing bottom, and arranges thrust-bearing at pump housing middle part, overcome the shortcoming that the pump shaft Oscillation Amplitude is large and rigidity is not enough in traditional large-scale submersible pump, thereby realize the purpose of this utility model.

The technical problem that the utility model solves can realize by the following technical solutions:

A kind of submersible pump, comprise the pump housing, impeller and motor, the pump housing is divided into the upper, middle and lower, and pump housing upper end is provided with the whirlpool mouth, and pump housing bottom is disposed with motor, motor cabinet, controlling device and base from top to bottom, motor is placed on the motor cabinet, motor cabinet is fixed on the base, and controlling device is arranged between motor cabinet and the base, comprises that also one is installed in the thrust-bearing on the bearing bracket stand, thrust-bearing is arranged on the middle part of the pump housing around pump shaft, in order to bear axial force and to increase the rigidity of pump shaft;

Preferably, pump housing top is provided with a seal, and the seal upper end is connected with a link press span, also is provided with a mechanical seal between seal and the described pump shaft.

Preferably, the seal lower end is connected with bearing bracket stand.

Preferably, motor and impeller are coaxial construction, and an end of pump shaft connects motor, and the other end connects impeller.

Preferably, the top of the pump housing, middle part, bottom are provided with sliding bearing, middle sliding bearing and properties of journal bearing lubricated around pump shaft respectively.

Particularly preferred, upper sliding bearing is arranged between whirlpool mouth and the pump shaft, and middle sliding bearing is arranged between bearing bracket stand and the pump shaft, and properties of journal bearing lubricated is arranged between motor cabinet and the pump shaft.

The beneficial effects of the utility model are:

For the pump housing of large flow, lift, in the situation that pump shaft is long, effectively reduced the Oscillation Amplitude of pump shaft, increased the rigidity of pump shaft integral body, be convenient to increase in the water pump power of motor to improve flow and lift; The efficient of water pump be can improve on the whole, parts working life and plant maintenance cycle prolonged, for whole project investment is reduced expenses.

Description of drawings

Fig. 1 is that submersible pump described in the utility model is along the sectional view of axial direction.

Embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with embodiment, further set forth the utility model.

Be illustrated in figure 1 as submersible pump described in the utility model, be divided into top 100, middle part 200 and bottom 300, pump housing middle part 200 and bottom 300 are covered with one and suck cylindrical shell 360, and the bottom that sucks cylindrical shell 360 tops and link press span 140 is bolted to connection.

Pump shaft 130 is arranged on pump housing center, and its upper end from bottom to top connects second level impeller 160, first order impeller 150 and whirlpool mouth 110 successively, and the lower end connects submersible electric motor 310; Base 350 is installed in the bottom of submersible pump bottom 300 and is fixedly connected with sucking cylindrical shell 360 tail ends, and controlling device 340 is arranged on the base 350, is fixedly connected with base 350 with pump shaft 130 concentric settings and by bolt.

Be provided with motor cabinet 330 on the controlling device 340, motor cabinet 330 tops are fixedly connected with motor housing 331, and motor cabinet 330 centers are provided with through hole 330a, through hole 330a also is provided with the flange that is directed upwardly, the lower end of pump shaft 130 is passed from this through hole 330a, be provided with properties of journal bearing lubricated 320 between pump shaft 130 corresponding shaft parts and the flange, in order to avoiding pump shaft 130 wearing and tearing, and the vibration that pump shaft 130 produces when slowing down friction and buffer device running; Submersible electric motor 310 is fixedly mounted on the motor cabinet 330, also is provided with motor housing 331 around the submersible electric motor 310, and motor housing 331 is fixed on the motor cabinet 330.

Bearing bracket stand 213 is installed in the middle part 200 of the pump housing, and the center is provided with through hole 213a, also is provided with on the through hole 213a along the downward flange of axis, and pump shaft 130 passes from through hole 213a, and middle sliding bearing 220 is arranged between pump shaft 130 corresponding shaft parts and the flange.

Thrust collar base 212 is arranged on the bearing bracket stand 213 and with bearing bracket stand 213 around pump shaft 130 and is fixedly connected with, and thrust collar base 212 is provided with thrust collar 211, and thrust-bearing 210 is arranged between thrust collar 211 and the thrust collar base 212 in order to bear axial force; Thrust-bearing 210 can also increase the rigidity of pump shaft 130, the Oscillation Amplitude of pump shaft 130 when reducing the equipment operation.

100 places, pump housing top are provided with whirlpool mouth 110, first order impeller 150, second level impeller 160, upper sliding bearing 120 and link press span 140, be provided with direction inward flange 111 down on whirlpool mouth 110 internal surfaces, inward flange 111 is connected with the top of pump shaft 130, wherein the intersegmental sliding bearing 120 that also is provided with of the inwall of inward flange 111 and pump shaft 130 corresponding axis.

Link press span 140 upper ends are fixedly connected with second level impeller 160, and its lower end is connected with the upper end of seal 230, and seal 230 centers are provided with the through hole that passes for pump shaft 130, are provided with mechanical seal 231 in the through hole; The lower end of seal 23 is connected with the upper end of bearing bracket stand 213.

The submersible pump of large flow, lift often needs powerful motor, and motor is as the vibration source in the pump housing, powerful motor means that the Oscillation Amplitude of pump shaft will increase greatly, submersible electric motor 310 is arranged on 300 places, bottom of the pump housing, the part vibration that its running produces can be absorbed by base 350; Thrust-bearing 210 is arranged on 200 places, pump housing middle part, not only in order to bear the axial force of equipment, can also play certain clamping action to pump shaft 130, increases rigidity and the Oscillation Amplitude of pump shaft 130; Moreover, because the upper, middle and lower of pump shaft is equipped with sliding bearing, when slowing down pump shaft 130 axial rub, it also it is had certain absorbing effect.

Above demonstration and described basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. submersible pump, comprise the pump housing, impeller and motor, the described pump housing is divided into the upper, middle and lower, pump housing upper end is provided with the whirlpool mouth, described pump housing bottom is disposed with motor, motor cabinet, controlling device and base from top to bottom, described motor is placed on the motor cabinet, motor cabinet is fixed on the base, described controlling device is arranged between motor cabinet and the base, it is characterized in that, comprise that also one is installed in the thrust-bearing on the bearing bracket stand, described thrust-bearing is arranged on the middle part of the described pump housing around pump shaft, in order to bear axial force and to increase the rigidity of pump shaft;

2. a kind of submersible pump as claimed in claim 1 is characterized in that, described pump housing top is provided with a seal, and described seal upper end is connected with a link press span, also is provided with a mechanical seal between seal and the described pump shaft.

3. a kind of submersible pump as claimed in claim 2 is characterized in that, described seal lower end is connected with bearing bracket stand.

4. a kind of submersible pump as claimed in claim 1 is characterized in that, described motor and impeller are coaxial construction, and an end of described pump shaft connects motor, and the other end connects impeller.

5. a kind of submersible pump as claimed in claim 1 is characterized in that, the top of the described pump housing, middle part, bottom are provided with sliding bearing, middle sliding bearing and properties of journal bearing lubricated around pump shaft respectively.

6. a kind of submersible pump as claimed in claim 5 is characterized in that, described upper sliding bearing is arranged between described whirlpool mouth and the pump shaft, and middle sliding bearing is arranged between described bearing bracket stand and the pump shaft, and properties of journal bearing lubricated is arranged between described motor cabinet and the pump shaft.