CN204239321U - With the self-balance type multistage centrifugal pump of axial-force testing device - Google Patents
With the self-balance type multistage centrifugal pump of axial-force testing device Download PDFInfo
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- CN204239321U CN204239321U CN201420651874.9U CN201420651874U CN204239321U CN 204239321 U CN204239321 U CN 204239321U CN 201420651874 U CN201420651874 U CN 201420651874U CN 204239321 U CN204239321 U CN 204239321U
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Abstract
The utility model discloses the self-balance type multistage centrifugal pump of band axial-force testing device, the some impellers comprising main shaft and be set on main shaft and anti-impeller, described impeller and anti-impeller are arranged on two ends, described main shaft ground symmetrically, and described impeller and anti-impeller are respectively arranged with stator and return guide vane; The two ends of described main shaft are arranged with fore bearing body and rear bearing body respectively, described fore bearing body and rear bearing body are connected inlet segment and time slow inlet segment respectively, the middle part of described main shaft is provided with water exit end, and described time slow inlet segment is connected with described water exit end by screen pipe; Be provided with thrust-bearing in described rear bearing body, described thrust-bearing is set on the termination of main shaft, and its inside is provided with axial-force testing device.The utility model effectively balances impeller and to be in operation the end thrust produced, thus eliminates the axial thrust balancing devices such as Balance disc or balancing drum; Axial-force testing device is set and achieves the measurement of on-the-spot Multipoint synchronous and test process automation.
Description
Technical field
The utility model relates to centrifugal pumping apparatus industry field, specifically a kind of self-balance type multistage centrifugal pump with axial-force testing device.
Background technique
On existing market, most of multistage centrifugal pump is in running, pressure difference is caused to accumulate thus form powerful axial force because it is equipped with multiple impeller, seal clearance leakage failure will be caused to increase if axial force can not obtain active balance, centrifugal pump operational efficiency is reduced; The inefficacy of seal clearance simultaneously can cause axial force to increase, and pump damage of components, affects the normal work of centrifugal pump.
The design of current most of pump adopts traditional balancing axial thrust method to open equalizing orifice as thrust bearing, impeller or arranges balance tube, establishes the back of the body (pair) blade, adopts the method balancing axial thrusts such as sound friction balance auxiliary structure, but above method all has some limitations:
Thrust bearing effectively can solve the axial force balance problem of axially less miniature pump, simple, but applicable situation narrow limitation is large, is not suitable for middle high parameter and multistage centrifugal pump application; Adopt the structure of equalizing orifice and balance tube to increase the leakage of pump, volumetric efficiency reduces, and the backflow of equalizing orifice has destruction to impeller inlet fluid flow state, and the method is to being adapted at small size single stage pump uses; The method of the back of the body (pair) blade balance axial force will make pump efficiency reduce, and this structure may make back blade produce the axial force exceeding prophyll wheel, and axial force direction is changed; What sound friction balance pair adopted is end face high pressure sealing, is difficult in operation realize.
In view of prior art exists above-mentioned defect, therefore, have and to be developedly a kind ofly can test axial force and the effective multistage centrifugal pump of axial force balance.
Model utility content
The purpose of this utility model is the defect overcoming above-mentioned prior art, provides a kind of and can test axial force and the effective multistage centrifugal pump of axial force balance.
The technical solution of the utility model is achieved in that the self-balance type multistage centrifugal pump of band axial-force testing device, the some impellers comprising main shaft and be set on main shaft and anti-impeller, it is characterized in that, described impeller and anti-impeller are arranged on two ends, described main shaft ground symmetrically, and described impeller and anti-impeller are respectively arranged with stator and return guide vane; The two ends of described main shaft are arranged with fore bearing body and rear bearing body respectively, described fore bearing body and rear bearing body are connected inlet segment and time slow inlet segment respectively, the middle part of described main shaft is provided with water exit end, and described time slow inlet segment is connected with described water exit end by screen pipe; Be provided with thrust-bearing in described rear bearing body, described thrust-bearing is set on the termination of main shaft, and its inside is provided with axial-force testing device.
Further, described thrust axis bearing sleeve comprises bearing outer ring and bearing inner race, is provided with gap between described bearing outer ring and bearing inner race.
Further, described axial-force testing device comprises left foil gauge and right foil gauge, and described left foil gauge and right foil gauge are pasted in the described gap stated between bearing outer ring and bearing inner race.
Further, described foil gauge adopts strain gauge, and described strain gauge is connected with processing terminal by signaling line.
Further, described processing terminal is computer, the electrical signal that described strain gauge exports is transferred to bridge road circuit successively by signaling line, eliminator, and amplifier and A/D converter are finally input in computer has the Axial Force Calculating program of setting in computer to process.
Further, described computer is also provided with alarm, when axial force exceedes limit value, exportable switching value, drives alarm to report to the police.
Compared with prior art, the utility model has the following advantages:
1, being symmetrical arranged of impeller and anti-impeller makes positive and negative two groups of impellers end thrust produced that is in operation substantially be balanced, and eliminates high pressure drop, easily washes away, the easy to wear and axial thrust balancing devices such as the Balance disc that rate of fault is high or balancing drum;
2, eliminate small―gap suture Balance disc device, be applicable to the occasion that medium character is more severe, application increases;
3, structure of the present utility model makes wearing and tearing and system interference be reduced, the remaining end thrust of fraction is born by thrust-bearing, pump shaft uniform force, and profit peak value is effectively reduced, improve rigidity and the critical speed of rotation of pump rotor, pump operation stationarity and reliability are improved;
4, without balance disk wear and axial pulse, impeller and stator are in best Shaft alignment state all the time, continue Effec-tive Function, extend the life-span of pump;
5, axial force testing employing strain measurement method is highly sensitive, speed fast, it is accurate to measure, the on-the-spot Multipoint synchronous of little, the easy realization of volume is measured, and test process automation.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the self-balance type multistage centrifugal pump of the utility model band axial-force testing device;
Fig. 2 is the overall structure schematic diagram of the self-balance type multistage centrifugal pump of the utility model band axial-force testing device;
Embodiment
Below in conjunction with accompanying drawing, concrete case study on implementation of the present utility model is illustrated:
As depicted in figs. 1 and 2, with the self-balance type multistage centrifugal pump of axial-force testing device, comprise main shaft 1 and the some impellers 3 be set on main shaft 1 and anti-impeller 10, described impeller 3 and anti-impeller 10 are arranged on two ends, described main shaft 1 ground symmetrically, and described impeller 3 and anti-impeller 10 are respectively arranged with the stator 4 and return guide vane 11 that coordinate respectively with it, described stator 47 and return guide vane are also arranged on the two ends 1 of described main shaft 1 symmetrically, arrange to this symmetry properties and can effectively balance the end thrust produced in multistage centrifugal pump operation, reach cancellation high pressure drop, easily wash away, the axial thrust balancing deviceses such as the Balance disc that easy to wear and rate of fault is high or balancing drum, make structure more simple, save material and data, reduce manufacture cost.
The two ends of described main shaft 1 are arranged with fore bearing body 12 and rear bearing body 13 respectively, described fore bearing body 12 and rear bearing body 13 are connected inlet segment 2 and time slow inlet segment 8 respectively, the middle part of described main shaft 1 is provided with water exit end 6, and described time slow inlet segment 6 is connected with described water exit end 6 by screen pipe 7; Be provided with thrust-bearing 14 in described rear bearing body 13, described thrust-bearing 14 is set on the termination of main shaft 1, and its inside is provided with axial-force testing device 15.
Particularly, described thrust axis bearing sleeve 14 comprises bearing outer ring 16 and bearing inner race 17, is provided with gap between described bearing outer ring 16 and bearing inner race 17.Described axial-force testing device 15 comprises left foil gauge 18 and right foil gauge 19, and described left foil gauge 18 and right foil gauge 19 are pasted in the described gap stated between bearing outer ring 16 and bearing inner race 17.Described foil gauge adopts strain gauge, and described strain gauge is connected with processing terminal by signaling line 20.Described processing terminal is computer, the electrical signal that described strain gauge exports is complied with by signaling line and is transferred to bridge road circuit for 20 times, eliminator, amplifier and A/D converter are finally input in computer has the Axial Force Calculating program of setting in computer to process.Described computer is also provided with alarm (for providing in figure), when axial force exceedes limit value, exportable switching value, drives alarm to report to the police.
As described above, be only preferred embodiment of the present utility model, when can not limit the scope of the utility model enforcement with this, namely the simple equivalence change generally done according to the utility model claim and model utility description with modify, all still belong in scope that the utility model patent contains.
Claims (6)
1. be with the self-balance type multistage centrifugal pump of axial-force testing device, the some impellers comprising main shaft and be set on main shaft and anti-impeller, it is characterized in that, described impeller and anti-impeller are arranged on two ends, described main shaft ground symmetrically, and described impeller and anti-impeller are respectively arranged with stator and return guide vane; The two ends of described main shaft are arranged with fore bearing body and rear bearing body respectively, described fore bearing body and rear bearing body are connected inlet segment and time slow inlet segment respectively, the middle part of described main shaft is provided with water exit end, and described time slow inlet segment is connected with described water exit end by screen pipe; Be provided with thrust-bearing in described rear bearing body, described thrust-bearing is set on the termination of main shaft, and its inside is provided with axial-force testing device.
2. the self-balance type multistage centrifugal pump of band axial-force testing device as claimed in claim 1, it is characterized in that, described thrust axis bearing sleeve comprises bearing outer ring and bearing inner race, is provided with gap between described bearing outer ring and bearing inner race.
3. the self-balance type multistage centrifugal pump of band axial-force testing device as claimed in claim 2, it is characterized in that, described axial-force testing device comprises left foil gauge and right foil gauge, and described left foil gauge and right foil gauge are pasted in the described gap stated between bearing outer ring and bearing inner race.
4. the self-balance type multistage centrifugal pump of band axial-force testing device as claimed in claim 3, it is characterized in that, described foil gauge adopts strain gauge, and described strain gauge is connected with processing terminal by signaling line.
5. the self-balance type multistage centrifugal pump of band axial-force testing device as claimed in claim 4, it is characterized in that, described processing terminal is computer, the electrical signal that described strain gauge exports is transferred to bridge road circuit successively by signaling line, eliminator, amplifier and A/D converter are finally input in computer and are processed by the Axial Force Calculating program set in computer.
6. the self-balance type multistage centrifugal pump of band axial-force testing device as claimed in claim 5, is characterized in that, described computer is also provided with alarm, and when axial force exceedes limit value, exportable switching value, drives alarm to report to the police.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420651874.9U CN204239321U (en) | 2014-10-27 | 2014-10-27 | With the self-balance type multistage centrifugal pump of axial-force testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420651874.9U CN204239321U (en) | 2014-10-27 | 2014-10-27 | With the self-balance type multistage centrifugal pump of axial-force testing device |
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| CN204239321U true CN204239321U (en) | 2015-04-01 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108939182A (en) * | 2018-09-14 | 2018-12-07 | 长治市久安人工心脏科技开发有限公司 | A kind of magnetic dumping control and detection system for artificial heart axial-flow pump |
| CN111649003A (en) * | 2020-06-09 | 2020-09-11 | 长沙佳能通用泵业有限公司 | Self-balancing multi-stage pump composite pipe |
-
2014
- 2014-10-27 CN CN201420651874.9U patent/CN204239321U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108939182A (en) * | 2018-09-14 | 2018-12-07 | 长治市久安人工心脏科技开发有限公司 | A kind of magnetic dumping control and detection system for artificial heart axial-flow pump |
| CN108939182B (en) * | 2018-09-14 | 2023-10-13 | 长治市久安人工心脏科技开发有限公司 | Magnetic unloading control and detection system for artificial heart axial flow pump |
| CN111649003A (en) * | 2020-06-09 | 2020-09-11 | 长沙佳能通用泵业有限公司 | Self-balancing multi-stage pump composite pipe |
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| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Guo Juan Document name: Notification of Passing Examination on Formalities |
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| DD01 | Delivery of document by public notice |