CN206092441U - Gas -tight loses canned motor pump - Google Patents
Gas -tight loses canned motor pump Download PDFInfo
- Publication number
- CN206092441U CN206092441U CN201621013835.1U CN201621013835U CN206092441U CN 206092441 U CN206092441 U CN 206092441U CN 201621013835 U CN201621013835 U CN 201621013835U CN 206092441 U CN206092441 U CN 206092441U
- Authority
- CN
- China
- Prior art keywords
- motor
- rear end
- air bag
- compensation
- hollow shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a gas -tight loses canned motor pump, drag including impeller, spiral case, slide bearing, motor, motor rear end cavity, compensation gasbag, fungus, the motor includes rotor, stator, hollow shaft and motor shell, and slide bearing includes preceding slide bearing and back slide bearing, sets up respectively at the both ends of hollow shaft, and motor rear end cavity sets up in motor one end, and the setting of compensation gasbag is provided with the gasbag interface on the compensation gasbag in the cavity of motor rear end, and the fungus drags installs in the cavity of motor rear end through threaded fixing base (13), the fungus drags the setting between hollow shaft and compensation gasbag to it has the liquid inlet and outlet hole to open on fixing base (13). The utility model discloses a fluid pressure hanged down the cavitation erosion problem that leads to in gas -tight loses canned motor pump can effectively reduce the pump body.
Description
Technical field
The utility model is related to water pump field, more particularly to a kind of cavitation-preventive canned motor pump.
Background technology
At low temperature or liquid leakage, liquid air pressure will be reduced liquid, will be attached in the surface of solids being in contact with it
Near to form bubble, the gas for dissolving in a liquid is likely to precipitation and forms bubble, and the phenomenon of this generation bubble referred to as cavitates.Water
The process of pump generation bubble and bubbles burst is exactly the cavitation erosion process of water pump.Cavitation erosion can produce vibration and noise, when bubble is crumbled and fall,
Liquid particle clashes into mutually, while also impinging on metal surface, produces the noise of various frequencies, has in audible pump when serious and " splits
" explosive sound, cavitation erosion generates substantial amounts of bubble, plugs runner, because of mechanical denuding and the effect of electrochemical corrosion, destruction
Diaphragm on metal surface, and accelerate corrosion rate.Cavitation erosion is characterized in that and first form many tiny fiber crops in metal surface
Point, is then gradually expanded into cave.
The content of the invention
Goal of the invention：A kind of cavitation-preventive canned motor pump is proposed for above-mentioned prior art, and then prevents cavitation.
Technical scheme：A kind of cavitation-preventive canned motor pump, including impeller, spiral case, sliding bearing, motor, motor rear end cavity, benefit
Repay air bag, bacterium to drag, motor includes rotor, stator, hollow shaft and motor case, sliding bearing includes advancing slip dynamic bearing and rear slip
Bearing, is separately positioned on the two ends of hollow shaft, and motor rear end cavity is arranged on motor one end, and compensation air bag is arranged on motor rear end
In cavity, balloon interface is provided with compensation air bag, bacterium is dragged and is arranged in motor rear end cavity by threaded fixed seat, institute
State bacterium and drag and be arranged between hollow shaft and compensation air bag, and be provided with into outage in fixed seat.
Further, aerating device is provided with outside compensation air bag, aerating device includes pressure gauge, charging valve and tonifying Qi
Mouth and pipeline, inside compensation balloon interface check valve is provided with, and charging valve is opened balloon interface position check valve, filled for Top
Pressure gauge is set between air valve and compensation balloon interface.
Beneficial effect：Cavitation-preventive canned motor pump of the present utility model, installed additional on motor rear end cavity a bacterium drag and
Compensation air bag, using the compressive characteristics of gas, when fluid pressure declines, due to the effect of gas-liquid inside and outside differential pressure, internal gas
Air bag is caused to expand so that liquid Side Volume reduces, so as to increase liquid lateral pressure, it is to avoid cavitation erosion caused by pump inlet pressure is low is asked
Topic；Bacterium is dragged and is arranged on motor rear end cavity by fixed seat, and is provided with fixed structure into outage, and bacterium is dragged for limiting
Compensation air bag excessively expands, and inside compensation balloon interface check valve is provided with, and prevents gas from leaking, and outside is provided with inflation dress
Put, aerating device includes pressure gauge charging valve and associated pipe etc., pressure gauge is used to check the blowing pressure, charging valve
Balloon interface position check valve is opened for Top, so as to inflate into compensation air bag.
Description of the drawings
Fig. 1 is cavitation-preventive canned motor pump profile.
Specific embodiment
The utility model is done below in conjunction with the accompanying drawings further is explained.
As described in Figure 1, cavitation-preventive canned motor pump, including impeller 1, spiral case 2, sliding bearing, motor, motor rear end cavity 8, benefit
Air bag 9 is repaid, motor includes rotor 5, stator 6, hollow shaft 4 and motor case 14, and sliding bearing includes advancing slip dynamic bearing 3 and rear cunning
Dynamic bearing 12, is separately positioned on the two ends of hollow shaft 4, and motor rear end cavity 8 is arranged on motor one end, and compensation air bag 9 is arranged on
In motor rear end cavity 8.Cavitation-preventive canned motor pump also drags 7 including bacterium, and the bacterium drags 7 to be arranged on motor rear end cavity 8, and liquid enters
After entering impeller 1, the gap between impeller 1 and spiral case 2 flows into motor side, and passes sequentially through advancing slip dynamic bearing 3 and motor case
14 gaps, electric machine rotor gap, rear sliding bearing 12 and the gap of motor rear end cavity 8, return to impeller and enter from hollow shaft center
Mouthful.
Compensation air bag 9 generally adopts quality of rubber materials, and other elastic materials are equally effective, using the compressive characteristics of gas,
When fluid pressure declines, due to the effect of gas-liquid inside and outside differential pressure, internal gas cause compensation air bag 9 to expand so that liquid Side Volume
Reduce, so as to increase liquid lateral pressure, it is to avoid cavitation erosion problem caused by pump inlet pressure is low.Bacterium drags 7 by threaded fixed seat
On motor rear end cavity 8, and it is provided with fixed seat into outage, the fluid chamber of outage connection motor rear end cavity 8
With the gap of rear sliding bearing 12, bacterium drags 7 excessively to expand for limiting compensation air bag 9, and compensation air bag tonifying Qi interface encloses sealing by O
It is connected with motor rear end cavity 8, check valve is installed inside compensation balloon interface, prevent gas from leaking, outside is provided with inflation
Device, aerating device includes pressure gauge 10, charging valve 11 and associated pipe etc., and pressure gauge 10 is used to check inflation pressure
Power, charging valve 11 can open balloon interface position check valve when opening with Top, so as to inflate into compensation air bag 9.
The above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of without departing from the utility model principle, some improvements and modifications can also be made, these improve and
Retouching also should be regarded as protection domain of the present utility model.
Claims (2)
1. a kind of cavitation-preventive canned motor pump, it is characterised in that including impeller (1), spiral case (2), sliding bearing, motor, motor rear end
Cavity (8), compensation air bag (9), bacterium drag, and motor includes rotor (5), stator (6), hollow shaft (4) and motor case (14), slide
Bearing includes advancing slip dynamic bearing (3) and rear sliding bearing (12), is separately positioned on the two ends of hollow shaft (4), motor rear end cavity
(8) motor one end is arranged on, compensation air bag (9) is arranged in motor rear end cavity, is provided with air bag in compensation air bag (9) and is connect
Mouthful, bacterium drags (7) by threaded fixed seat (13) in motor rear end cavity (8), and it is hollow that the bacterium drags (7) to be arranged on
Between axle and compensation air bag, and it is provided with into outage in fixed seat (13).
2. cavitation-preventive canned motor pump according to claim 1, it is characterised in that inflation dress is provided with outside compensation air bag 9
Put, aerating device includes pressure gauge (10), charging valve (11) and gas supplementing opening (12) and pipeline, compensation balloon interface inside is installed
There is check valve, charging valve (11) opens balloon interface position check valve for Top, so as to inflation in compensation air bag (9), fill
Pressure gauge (10) is set between air valve (11) and compensation balloon interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621013835.1U CN206092441U (en) | 2016-08-31 | 2016-08-31 | Gas -tight loses canned motor pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621013835.1U CN206092441U (en) | 2016-08-31 | 2016-08-31 | Gas -tight loses canned motor pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206092441U true CN206092441U (en) | 2017-04-12 |
Family
ID=58478542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621013835.1U Withdrawn - After Issue CN206092441U (en) | 2016-08-31 | 2016-08-31 | Gas -tight loses canned motor pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206092441U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194768A (en) * | 2016-08-31 | 2016-12-07 | 徐州潜龙泵业有限公司 | Cavitation-preventive canned motor pump |
-
2016
- 2016-08-31 CN CN201621013835.1U patent/CN206092441U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194768A (en) * | 2016-08-31 | 2016-12-07 | 徐州潜龙泵业有限公司 | Cavitation-preventive canned motor pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170412 Effective date of abandoning: 20180810 |