CN109441829A - A kind of Multistage centrifugal pump rotor displacement control system - Google Patents
A kind of Multistage centrifugal pump rotor displacement control system Download PDFInfo
- Publication number
- CN109441829A CN109441829A CN201811447110.7A CN201811447110A CN109441829A CN 109441829 A CN109441829 A CN 109441829A CN 201811447110 A CN201811447110 A CN 201811447110A CN 109441829 A CN109441829 A CN 109441829A
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- CN
- China
- Prior art keywords
- rotor
- pump
- impeller
- middle section
- control system
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- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
- F04D1/08—Multi-stage pumps the stages being situated concentrically
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0077—Safety measures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
Abstract
A kind of Multistage centrifugal pump rotor displacement control system, it is related to being centrifuged pump technical field.It includes the pump housing, and rotor is rotatably equipped in the pump housing, and the pump housing includes suction casing, middle section and Spit Section, suction casing is located on the left of Spit Section, middle section is located at left and right sides of Spit Section, and suction casing is equipped with suction inlet, and Spit Section is equipped with discharge opening, middle section is equipped with several impellers, impeller is fixedly mounted on rotor, and middle section is equipped with guide vane corresponding with impeller, and rotor right-hand end is equipped with shaft end nut, bearing (ball) cover is equipped on the right side of shaft end nut, bearing (ball) cover is equipped with Eddy-current sensor system.It is capable of measuring rotor and stator shaft orientation gap or immediate movement changes; when rotor displacement reaches the early warning value of setting, the system can be sounded an alarm; prompt needs maintenance down to replace bearing, parts with frication pair, causes the huge damage and related adverse effect of pump house system so as to avoid because excessive axial displacement causes pump rotor that direct severe friction occurs in the case where running at high speed to stator.
Description
Technical field
The present invention relates to centrifugation pump technical fields, and in particular to a kind of Multistage centrifugal pump rotor displacement control system.
Background technique
Centrifugal multistage pump multiple centrifugal pump is that the pump of more than two centrifugal pumps with said function gathers together, fluid channel structure
On, show that the medium pressure relief opening of the first order is communicated with the import of the second level, the medium pressure relief opening of the second level and the third level into
Mouth communicates, and such concatenated mechanism forms centrifugal multistage pump multiple centrifugal pump.The meaning of centrifugal multistage pump multiple centrifugal pump is to improve setting pressure.
The axial displacement of existing centrifugal multistage pump multiple centrifugal pump is a highly important signal, and excessive axial displacement can be such that high speed transports
Turn state lower rotor part and stator severe friction, huge damage can be caused to pump, threatens pump house operator safety.Main pump is broken
Bad shut down can seriously affect enterprise's production, cause beyond measure economic loss.Pump house operator can not under existence conditions
Whether reach inspection standard by unaided eye discrimination abrasion loss.
Summary of the invention
In view of the defects and deficiencies of the prior art, the present invention intends to provide a kind of displacements of Multistage centrifugal pump rotor to control
System processed, it can solve existing centrifugal multistage pump multiple centrifugal pump because bearing wear, balance disk wear and other parts wears are to a certain amount of
When cause larger axial displacement and defect that pump house operator can not differentiate under existence conditions.
To achieve the above object, the present invention is using following technical scheme: it includes the pump housing, rotational installation in the pump housing
There is rotor, the pump housing includes suction casing, middle section and Spit Section, and the left side of Spit Section, the middle section setting is arranged in the suction casing
In the left and right sides of Spit Section, the suction casing is provided with suction inlet, and the Spit Section is provided with discharge opening, the middle section setting
There are several impellers, the impeller is fixedly mounted on rotor, guide vane corresponding with the impeller is provided on the middle section,
The right-hand end of the rotor is equipped with shaft end nut, and bearing (ball) cover, the bearing end are provided on the right side of the shaft end nut
It covers and is provided with Eddy-current sensor system.
Further, the Eddy-current sensor system includes current vortex sensor, client display system, Central Pump Room
Control system, sacurity alarm system, the current vortex sensor are mounted on bearing (ball) cover, current vortex sensor respectively with client
Display system, Central Pump Room control system communication connection are held, the Central Pump Room control system and sacurity alarm system communication connect
It connects.
Further, the right end of the rotor is connect by angular contact ball bearing with the pump housing.
Further, the rotor is front shroud of impeller and middle section gap toward left end maximum displacement in impeller, and rotor exists
Past right end maximum displacement is back shroud of impeller and clearance between guide vanes in impeller.
The working principle of the invention: rotor tail end installs shaft end nut, leads to shaft end not because of axle center fabrication hole for solving
Flat and axial wood matter configures replacement problem；Shaft end nut is fixed material, and end face is smooth, it is ensured that the number of current vortex sensor detection
According to accurate；When the distance between shaft end nut and current vortex sensor probe change, shaft end nut and current vortex are passed
Magnetic field between sensor probe accordingly changes, and causes to shake voltage change, is finally completed the monitoring of rotor displacement.
Rotor displacement physical signal is converted into electric signal by current vortex sensor, is output to client display system,
Indicate that larger abrasion has occurred for bearing, friction pair when reaching early warning value by Central Pump Room control system analysis data rotor displacement,
It is sounded an alarm by sacurity alarm system, notice pump house operator on duty arranges the time to overhaul, expression when rotor displacement reaches shutdown value
Pump bearing, friction pair are damaged completely, and system high-frequency alarm needs hard stop to overhaul.
After adopting the above technical scheme, the invention has the following beneficial effects: multi-stage pump rotor displacement control system of the present invention can be surveyed
It measures rotor and stator shaft orientation gap or immediate movement changes, the system can issue when rotor displacement reaches the early warning value of setting
Alarm, prompt need maintenance down replace bearing, parts with frication pair, so as to avoid because excessive axial displacement cause pump rotor and
Direct severe friction occurs in the case where running at high speed and causes the huge damage and related adverse effect of pump house system for stator.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the structural schematic diagram of Eddy-current sensor system in the present invention；
Fig. 3 is the structural schematic diagram in part middle section in the present invention；
Fig. 4 is that output signal is transferred to client display system generation time-displacement curve in the present invention.
Description of symbols: rotor 1, suction casing 2, middle section 3, impeller 4, guide vane 5, Spit Section 6, angular contact ball bearing 7, axis
End nut 8, bearing (ball) cover 9, Eddy-current sensor system 10, front shroud of impeller 4-1, back shroud of impeller 4-2, current vortex sensor
10-1, client display system 10-2, Central Pump Room control system 10-3, sacurity alarm system 10-4.
Specific embodiment
Referring to shown in Fig. 1-Fig. 4, present embodiment the technical solution adopted is that: it includes the pump housing, in the pump housing
It is rotatably equipped with rotor 1, the pump housing includes suction casing 2, middle section 3 and Spit Section 6, and a left side for Spit Section 6 is arranged in the suction casing 2
The left and right sides of Spit Section 6 is arranged in side, the middle section 3, and the suction casing 2 is provided with suction inlet, and the Spit Section 6 is provided with
Discharge opening, the middle section 3 are provided with several impellers 4, and the impeller 4 is fixedly mounted on rotor 1, are arranged on the middle section 3
There is guide vane 5 corresponding with the impeller 4, the right-hand end of the rotor 1 is equipped with shaft end nut 8, rotor tail end installation axle
End nut 8 causes shaft end uneven and axial wood matter configuration replacement problem for solving because of axle center fabrication hole, the shaft end nut 8
Right side is provided with bearing (ball) cover 9, and shaft end nut 8 is fixed material, and end face is smooth, is provided with current vortex on the bearing (ball) cover 9
Sensing system 10.
The Eddy-current sensor system 10 includes current vortex sensor 10-1, client display system 10-2, center pump
Room control system 10-3, sacurity alarm system 10-4, the current vortex sensor 10-1 are mounted on bearing (ball) cover 9, current vortex
Sensor 10-1 respectively with client display system 10-2, Central Pump Room control system 10-3 communication connection, the Central Pump Room
Control system 10-3 and sacurity alarm system 10-4 communication connection, when between shaft end nut 8 and current vortex sensor 10-1 probe
Magnetic field of distance when changing between shaft end nut 8 and current vortex sensor 10-1 probe it is corresponding change, cause to shake
Voltage change is swung, the monitoring of the displacement of rotor 1 is finally completed；Rotor 1 physical signal is displaced by current vortex sensor 10-1 to turn
It is changed to electric signal, is output to client display system 10-2, data are analyzed by Central Pump Room control system 10-3, rotor 1 is displaced
It indicates that larger abrasion has occurred for bearing, friction pair when reaching early warning value, is sounded an alarm by sacurity alarm system 10-4.
The right end of the rotor 1 is connect by angular contact ball bearing 7 with the pump housing.
The rotor 1 is front shroud of impeller 4-1 and 3 gap of middle section toward left end maximum displacement in impeller 4, and rotor 1 is in leaf
Past right end maximum displacement is back shroud of impeller 4-2 and 5 gap of guide vane in wheel 4.
When the displacement of rotor 1 is forward or back over maximum displacement feasible value (shutdown value), in multistage pump operational process
Rotor 1 and stator can occur severe friction and cause the damage pumped.
Because of bearing clearance etc. (related to pump configuration design), new pump allows a certain amount of 1 axial displacement of rotor, therefore sets
Pump operation allows rotor 1 to be displaced normal value；When the secondary abrasion of pump friction, when the abrasion of angular contact ball bearing 7 is gradually worn out, axial displacement
Increase；Safe abrasion loss is allowed in setting, when bearing reaches the axial displacement early warning value of maximum allowable abrasion loss at this time, need to be stopped in due course
Machine maintenance.When the displacement of rotor 1 is more than maximum displacement feasible value (shutdown value), it is necessary to horse back shutdown maintenance.
As shown in figure 4, the 0-t1 period, axial displacement is maintained at normal value hereinafter, time period pump operates normally；t1-
The t2 period, axial displacement is between normal value and early warning value, and time period pump bearing, friction vice division chief are in mild wear state；
T2-t3 period, axial displacement reach early warning value, and pump bearing, friction vice division chief are sent out in state of wear by sacurity alarm system at this time
Early warning alarm out；More than the t3 period, axial displacement reaches shutdown value, and pump bearing, friction vice division chief are in the state of being seriously worn at this time
There are larger security risks, are issued by sacurity alarm system and shut down alarm；Hard stop is needed to handle.
The secondary abrasion feelings of bearing, friction can not be determined by solving operator by displacement wear monitoring early warning, dock reason
Condition safeguards multistage pump to realize the control to multistage pump axial displacement in time.
The above is only used to illustrate the technical scheme of the present invention and not to limit it, and those of ordinary skill in the art are to this hair
The other modifications or equivalent replacement that bright technical solution is made, as long as it does not depart from the spirit and scope of the technical scheme of the present invention,
It is intended to be within the scope of the claims of the invention.
Claims (4)
1. a kind of Multistage centrifugal pump rotor displacement control system, it is characterised in that: it includes the pump housing, rotational installation in the pump housing
There is rotor, the pump housing includes suction casing, middle section and Spit Section, and the left side of Spit Section, the middle section setting is arranged in the suction casing
In the left and right sides of Spit Section, the suction casing is provided with suction inlet, and the Spit Section is provided with discharge opening, the middle section setting
There are several impellers, the impeller is fixedly mounted on rotor, guide vane corresponding with the impeller is provided on the middle section,
The right-hand end of the rotor is equipped with shaft end nut, and bearing (ball) cover, the bearing end are provided on the right side of the shaft end nut
It covers and is provided with Eddy-current sensor system.
2. a kind of Multistage centrifugal pump rotor displacement control system according to claim 1, it is characterised in that: the current vortex
Sensing system includes current vortex sensor, client display system, Central Pump Room control system, sacurity alarm system, described
Current vortex sensor is mounted on bearing (ball) cover, and current vortex sensor is with client display system, Central Pump Room control respectively
System communication connection, the Central Pump Room control system and sacurity alarm system communication connection.
3. a kind of Multistage centrifugal pump rotor displacement control system according to claim 1, it is characterised in that: the rotor
Right end is connect by angular contact ball bearing with the pump housing.
4. a kind of Multistage centrifugal pump rotor displacement control system according to claim 1, it is characterised in that: the rotor exists
Past left end maximum displacement is front shroud of impeller and middle section gap in impeller, after rotor is impeller toward right end maximum displacement in impeller
Cover board and clearance between guide vanes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811447110.7A CN109441829A (en) | 2018-11-29 | 2018-11-29 | A kind of Multistage centrifugal pump rotor displacement control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811447110.7A CN109441829A (en) | 2018-11-29 | 2018-11-29 | A kind of Multistage centrifugal pump rotor displacement control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109441829A true CN109441829A (en) | 2019-03-08 |
Family
ID=65554578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811447110.7A Pending CN109441829A (en) | 2018-11-29 | 2018-11-29 | A kind of Multistage centrifugal pump rotor displacement control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109441829A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110529401A (en) * | 2019-09-02 | 2019-12-03 | 丹东通博泵业有限公司 | Magnetic drive pump with pump shaft axial displacement monitoring device |
| CN110630527A (en) * | 2019-03-19 | 2019-12-31 | 长沙中联泵业有限公司 | Multistage pump axial force testing system and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201232640Y (en) * | 2008-08-06 | 2009-05-06 | 长沙佳能通用泵业有限公司 | Abrasion monitoring device for horizontal multistage pump and horizontal multiple stage centrifugal pump with the device |
| CN201265547Y (en) * | 2008-09-23 | 2009-07-01 | 长沙佳能通用泵业有限公司 | Balancing type single-suction horizontal multiple-stage centrifugal pump |
| CN105114334A (en) * | 2015-07-27 | 2015-12-02 | 北京化工大学 | Method for monitoring abrasion loss of impeller wear ring of multi-stage centrifugal pump based on computational fluid dynamics theory |
| WO2017088713A1 (en) * | 2015-11-23 | 2017-06-01 | 上海连成（集团）有限公司 | Multi-stage pump |
| CN208155287U (en) * | 2018-05-17 | 2018-11-27 | 成都威尔森科技发展有限责任公司 | A kind of rotating machinery displacement detecting instrument |
-
2018
- 2018-11-29 CN CN201811447110.7A patent/CN109441829A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201232640Y (en) * | 2008-08-06 | 2009-05-06 | 长沙佳能通用泵业有限公司 | Abrasion monitoring device for horizontal multistage pump and horizontal multiple stage centrifugal pump with the device |
| CN201265547Y (en) * | 2008-09-23 | 2009-07-01 | 长沙佳能通用泵业有限公司 | Balancing type single-suction horizontal multiple-stage centrifugal pump |
| CN105114334A (en) * | 2015-07-27 | 2015-12-02 | 北京化工大学 | Method for monitoring abrasion loss of impeller wear ring of multi-stage centrifugal pump based on computational fluid dynamics theory |
| WO2017088713A1 (en) * | 2015-11-23 | 2017-06-01 | 上海连成（集团）有限公司 | Multi-stage pump |
| CN208155287U (en) * | 2018-05-17 | 2018-11-27 | 成都威尔森科技发展有限责任公司 | A kind of rotating machinery displacement detecting instrument |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630527A (en) * | 2019-03-19 | 2019-12-31 | 长沙中联泵业有限公司 | Multistage pump axial force testing system and method |
| CN110630527B (en) * | 2019-03-19 | 2022-11-01 | 长沙中联泵业股份有限公司 | Multistage pump axial force testing system and method |
| CN110529401A (en) * | 2019-09-02 | 2019-12-03 | 丹东通博泵业有限公司 | Magnetic drive pump with pump shaft axial displacement monitoring device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190308 |