CN103867457B - Centrifugal-pump stopping safety protection method and device - Google Patents
Centrifugal-pump stopping safety protection method and device Download PDFInfo
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- CN103867457B CN103867457B CN201410123340.3A CN201410123340A CN103867457B CN 103867457 B CN103867457 B CN 103867457B CN 201410123340 A CN201410123340 A CN 201410123340A CN 103867457 B CN103867457 B CN 103867457B
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Abstract
The invention discloses a centrifugal-pump stopping safety protection method and device. The centrifugal-pump stopping safety protection method is characterized by including the steps that a damping device is arranged to be connected with a water pump main shaft and/or a motor main shaft of a water pump unit, when the water pump unit works, the damping device has no effect, when the water pump unit is powered off to be stopped, braking torque is applied to the water pump main shaft and/or the motor main shaft of the water pump unit through the damping device to limit the reverse rotation speed of the water pump unit, and water pump unit protection and water hammer protection are achieved. According to the centrifugal-pump stopping safety protection method and device, the braking torque can be immediately applied when a centrifugal pump is stopped due to faults, the reverse rotation time of the water pump unit is prolonged, meanwhile, the reverse rotation speed of the water pump can be controlled within a rated rotation speed range or any rotation speed range, the water hammer pressure in a pipe is reduced, the aims of water pump unit protection and water hammer protection after the pump is stopped are achieved, motor loads are not increased, energy consumption is not increased, and the project investment and the water delivery cost can be effectively reduced.
Description
Technical field
The present invention relates to a kind of centrifugal pump termination of pumping safety protecting method, high particularly to a kind of Mountain Area more than fluctuating distance
Lift aqueduct termination of pumping water pump assembly security protection and the method for abatement water hammer.The invention still further relates to it is a kind of defeated for Mountain Area
The device of waterpipe water pump in pump station security protection.
Background technology
In Mountain Area distance high-lift pipeline water delivery engineering, water hammer accident is more universal phenomenon, especially
It is pipeline discrepancy in elevation big rise and fall, engineering with a varied topography.The example that accident produces is also diversified, in pumping station system, because
Power-off or other reasonses and make the unexpected termination of pumping of water pump, the pressure in pressure pipe produces on different degrees of pressure after declining again
Rise, lead to pump-stopping water hammer.Water hammer accident all can cause different degrees of disaster, gently then cause pipe burst (i.e. booster), cause
Supply water and interrupt, impact is normal to be produced and live；Heavy then cause to flood ruin pumping plant, pumping station sinking etc. serious consequence.Under individual cases,
Also pipeline can be destroyed because of water hammer accident, cause current to wash out building, damage equipment, injure the secondary disasters such as operator.
Pumping accident protecting water hammer mainly includes preventing the destruction to pressure pipeline and its adnexa for the water hammer pressure；Prevent unit
Speed reversal is too fast to cause water pump and motor to destroy.For this reason, existing " Code for design of pumping cstations " gb50265-2010 regulation: " from
Heart pump maximum inversion speed is not to be exceeded 1.2 times of rated speed, and the persistent period exceeding rated speed is not to be exceeded 2min.”
At present frequently with protectiving scheme be that flywheel moment is installed additional using hydraulic butterfly valve, Slow Close Valve, control valve for water pump and water pump.Thing
Therefore hydraulic butterfly valve, Slow Close Valve and control valve for water pump are all first to allow valve close certain angle rapidly in termination of pumping when shutting down,
Reduce inflow-rate of water turbine, in pipeline during aqueous reflux, water pump reversion will not be too fast.Meanwhile, low-angle excessively stream can reduce the liter after valve
Pressure protective conduit.Install the inertia that flywheel moment is by increasing water pump flywheel additional, after extending accidental shutdown, the positive rotary speed of water pump subtracts
Little time and the time of speed reversal increase.For the aqueduct of large-scale high-lift distance, under normal circumstances in water pump
After power-off, impeller all will reverse, even if install flywheel moment water pump additional still can invert.Existing protectiving scheme is clearly present
Weak point: 1) increased the investment of water pump assembly or motor；2) starting time making motor after setting up inertial flywheel is prolonged
Long, cause difficulty in starting when serious；3) also increase water delivery energy consumption after increasing inertial flywheel simultaneously, improve the one-tenth of water transfer system
This；4) forward and backward time of water pump assembly and reduce speed reversal after simply relatively extending accidental shutdown after increasing inertial flywheel,
But speed reversal is uncontrollable.
Content of the invention
For drawbacks described above present in prior art, the invention provides one kind can be in centrifugal pump termination of pumping time limit controlling the water circulation
Pump speed reversal, the centrifugal pump termination of pumping safety protecting method of abatement water hammer pressure, it does not need to increase water pump assembly or motor
Rotary inertia, do not extend the motor start-up time, do not increase water delivery energy consumption yet.
The present invention is achieved by the following technical solution: a kind of centrifugal pump termination of pumping safety protecting method, its special it
Place is: setting damping unit is connected with the Pump Shaft of water pump assembly and/or electric machine main shaft, when water pump assembly works, described
Damping unit is inoperative, and when water pump assembly power-off termination of pumping, described damping unit is to the Pump Shaft of water pump assembly and/or electricity
Owner's axle applies braking moment to limit the speed reversal of water pump assembly, realizes water pump assembly protection and protecting water hammer.
In the inventive method, it is inoperative when water pump assembly works for damping unit, when water pump assembly power-off termination of pumping,
Damping unit ability applies braking moment to limit the reversion speed of water pump assembly to the Pump Shaft of water pump assembly and/or electric machine main shaft
Degree, thus realize the restriction to water pump assembly speed reversal and water hammer security protection.
Damping unit in the inventive method can adopt following structure: described damping unit includes electromagnetic clutch and company
It is connected on the centrifugation antivibrator of described electromagnetic clutch rear end, described centrifugation antivibrator includes being fixedly mounted on electromagnetic clutch electromagnetism
Movable friction plate on outer brake drum on the axle of the rear end of clutch, the axle of rear end being movably mounted to electromagnetic clutch,
Afterburning lever, described outer brake drum and movable friction plate cooperation are installed, and are provided with spring between outer brake drum and movable friction plate,
Described reinforcing lever is at least three, and it is rotatably connected on the axle of the rear end of electromagnetic clutch, each afterburning lever bag
Include the centrifugation bar connecting into l shape and force application rod, described force application rod is located at described movable friction plate side.When water pump assembly works,
The electromagnetic clutch of damping unit separates, and now damping unit is inoperative, when water pump assembly power-off termination of pumping, damping unit
Electromagnetic clutch is inhaled merga pass centrifugation antivibrator and is applied braking moment to the Pump Shaft of water pump assembly and/or electric machine main shaft,
Thus limiting the speed reversal of water pump assembly.
Described electromagnetic clutch is normally closed type electromagnetic clutch.
In the present invention, a kind of centrifugal pump termination of pumping safety device be the technical scheme is that it include water pump and with
The motor that water pump connects, it is characterized in that: it is provided with damping unit and be connected with Pump Shaft and/or electric machine main shaft, described damping
Device includes electromagnetic clutch and is connected to the centrifugation antivibrator of described electromagnetic clutch rear end, and described centrifugation antivibrator includes solid
On outer brake drum that Dingan County is contained on the axle of the rear end of electromagnetic clutch, the axle of rear end being movably mounted to electromagnetic clutch
Movable friction plate, afterburning lever, described outer brake drum and movable friction plate cooperation are installed, outer brake drum and movable friction plate it
Between be provided with spring, described reinforcing lever be at least three, it is rotatably connected on the axle of the rear end of electromagnetic clutch, each
Afterburning lever includes centrifugation bar and the force application rod connecting into l shape, and described force application rod is located at described movable friction plate side.
In apparatus of the present invention, when water pump assembly works, the electromagnetic clutch in damping unit is in released state, motor
Can normally start, not increase motor starting time, during water pump assembly power-off termination of pumping, electromagnetic clutch adhesive, it is centrifuged antivibrator
Immediately rotate with Pump Shaft/electric machine main shaft, when water pump speed reversal is close to setting speed, centrifugation antivibrator is to Pump Shaft
And/or electric machine main shaft apply braking moment, limit water pump assembly speed reversal, reach restriction water pump assembly reversion do not exceed the speed limit,
Prevent from flying the purpose of anecdote event, in pipeline, water body refluence reduces pipeline pump-stopping water hammer pressure simultaneously, realizes pipeline pump-stopping water hammer
The purpose of protection, thus realize the restriction to water pump assembly speed reversal and water hammer security protection.
The setting of the damping unit in the present invention can adopt various ways, such as can adopt following setting forms: described water pump
And/or motor is two ends shaft version, the electromagnetic clutch of described damping unit is arranged on Pump Shaft and/or motor master
The outside of axle goes out on axle head.The electromagnetic clutch of damping unit is arranged on Pump Shaft and/or the outside of electric machine main shaft goes out axle head
On, when water pump assembly works, electromagnetic clutch is in released state, and damping unit is inoperative, when water pump assembly power-off stops
During pump, electromagnetic clutch is inhaled merga pass centrifugation antivibrator and is applied braking moment to Pump Shaft and/or electric machine main shaft.Described resistance
The outside that Buddhist nun's device can be provided separately within Pump Shaft or electric machine main shaft goes out on axle head it is also possible in Pump Shaft and/or motor
The outside of main shaft goes out and arranges on axle head simultaneously.
Damping unit in the present invention can also be using following setting form: in the union end of Pump Shaft and electric machine main shaft
Between be provided with gear drive or belt gear or chain-drive mechanism is coupled with pump shaft and motor shaft respectively, described resistance
Buddhist nun's device passes through described gear drive or belt gear or chain-drive mechanism is coupled with pump shaft and motor shaft.Work as water
During pump assembly work, electromagnetic clutch is in released state, and damping unit is inoperative, when water pump assembly power-off termination of pumping, electricity
Magnet clutch is inhaled merga pass centrifugation antivibrator and through above-mentioned drive mechanism, brake force is transmitted feed pump shaft and motor shaft, from
And water pump assembly is realized with rotating speed and limits.Above-mentioned setting form is suitable to the big water pump assembly of speed reversal after shutdown, according to reality
Border needs described drive mechanism that brake force that suitable gear ratio increase centrifugation antivibrator may be selected.
Described electromagnetic clutch is normally closed type electromagnetic clutch, electromagnetic clutch power-off adhesive, and energising separates.
In order to ensure to be centrifuged the damping of antivibrator, described reinforcing lever is four being uniformly arranged.
In order to ensure to be centrifuged the damping of antivibrator, described centrifugation bar is provided with the centrifugal-block of adjustable position.
The inventive method is simple, reliable, and it can apply braking moment immediately in centrifugal pump pumping accident, is extending water pump
While the unit return time, water pump can be controlled to reverse rotating speed within specified or any rotating speed, reduce the water hammer in pipeline
Pressure, reaches the protection of termination of pumping water pump assembly and the purpose of protecting water hammer.Present invention, avoiding in conventional scheme pass through increase water pump,
The unfavorable factor that the rotary inertia of motor and flywheel is brought, because the damping unit in the present invention is when water pump assembly works
Rotate not together, thus do not increase the load of motor, do not increase energy consumption, motor can also normally start, can effectively reduce work
Journey investment and reduction water delivery cost.All kinds of water hammer-resistants, anti-runaway water pump can be made using the present invention, effectively reduce pumping plant pipeline
The security protection expense of system and water delivery cost.
Brief description
Fig. 1 is the structural representation of the embodiment of the present invention 1；
Fig. 2 is the structural representation of the embodiment of the present invention 2；
Fig. 3 is the structural representation of the embodiment of the present invention 3；
Fig. 4 is the structural representation of the damping unit in the embodiment of the present invention；
Fig. 5 is the left view of Fig. 4；
In figure, 1 is motor, and 2 is shaft inside motor, and 3 is shaft coupling, and 4 is shaft inside water pump, and 5 is water pump, and 6 is electricity
Shaft outside machine, 7 is damping unit, and 8 is frame, and 9 is shaft outside water pump, and 10 is bearing block, and 11 is drive mechanism, and 12 is anti-
Guard shield, 13 is shell, and 14 is outer brake drum, and 15 is movable friction plate, and 16 is centrifugal-block, and 17 is afterburning lever, and 18 is spring, 19
It is the axle of the rear end of electromagnetic clutch, 20 is electromagnetic clutch, 21 is the output shaft of electric machine main shaft/Pump Shaft/drive mechanism,
22 is centrifugation bar, and 23 is force application rod, and 24 is spring, and 25 is bearing pin.
Specific embodiment
Below by embodiment and combine accompanying drawing the present invention is further illustrated:
Embodiment 1
A kind of centrifugal pump termination of pumping safety protecting method, it is that setting damping unit is connected with the electric machine main shaft of water pump assembly,
When water pump assembly works, described damping unit is inoperative, and when water pump assembly power-off termination of pumping, described damping unit is to motor
Main shaft applies braking moment to limit the speed reversal of water pump assembly, realizes water pump assembly protection and protecting water hammer.
As shown in figure 1, being a kind of structural representation of centrifugal pump termination of pumping safety device, it includes frame 8, is arranged on
Motor 1 in frame 8 and water pump 5, water pump 5 is centrifugal pump.In the present embodiment, motor 1 is two ends shaft version, motor 1
Inner side shaft 2 coupled with the inner side shaft 4 of water pump 5 by shaft coupling 3, on the outside shaft 6 of motor 1 couple damping unit 7.
As shown in Figure 4, Figure 5, after described damping unit 7 includes electromagnetic clutch 20 and is connected to described electromagnetic clutch 20
The centrifugation antivibrator at end.Described electromagnetic clutch 20 adopts flange-type, normally closed type electromagnetic clutch, is prior art, and it can be by
Pumping plant 24v or 90v DC power control, electromagnetic clutch power-off adhesive, energising separates.The front end of electromagnetic clutch 20 and motor
1 outside shaft 6 couples.Described centrifugation antivibrator includes outer brake drum 14, movable friction plate 15, afterburning lever 17.Outer braking
Drum 14 is fixedly mounted on the axle 19 of the rear end of electromagnetic clutch 20, installation activity friction plate 15 outside it, movable friction plate 15
Can move axially along axle 19, be provided with spring 18 between outer brake drum 14 and movable friction plate 15, movable friction plate 15 is in spring
It is axially movable in the presence of 18.Outer brake drum 14 and movable friction plate 15 are bowl-shape design, and outer brake drum 14 and activity rub
Accessible cooperation between piece 15.Afterburning lever 17 is at least three, generally can adopt three or four or five etc., for ensureing institute
The balance of applying power, set afterburning lever 17 should be evenly arranged, and in the present embodiment, afterburning lever 17 is four being evenly arranged
Individual, it is arranged on the outside of movable friction plate 15.Each afterburning lever 17 includes centrifugation bar 22 and the force application rod connecting into l shape
23, afterburning lever 17 is rotatably connected to by bearing pin 25 on the axle 19 of rear end of electromagnetic clutch 20, afterburning lever 17
Force application rod 23 is located at described movable friction plate 15 side.Centrifugal-block 16, centrifugal-block 16 are provided with the centrifugation bar 22 of afterburning lever 17
Installation site scalable.It is also associated with spring 24 between afterburning lever 17 and axle 19.
Damping unit in the present invention is a kind of device for controlling, limiting water pump assembly speed reversal, and its work is former
Reason is: drive the centrifugal-block 16 on afterburning lever 17 to rotate using rotating backward of motor shaft itself, thus producing centrifugal force, plus
Power lever 17 rotates around bearing pin 25 under the influence of centrifugal force, and its force application rod 23 is contacted with movable friction plate 15 and promotes activity to rub
The outside brake drum 14 of pad 15 is mobile, and movable friction plate 15 contacts generation friction with outer brake drum 14, thus producing to motor shaft
Brake force.When the rotary speed of motor shaft drops to OK range, the thrust of spring 18 and centrifugal-block 16 pass through afterburning lever 17
When being applied to the thrust of movable friction plate 15 and balancing each other, lose friction between movable friction plate 15 and outer brake drum 14, motor is not
Damped by frictional force again, water pump assembly rotates under rated speed.Whereas if water pump assembly rotating speed increases to over normal model
Enclose, centrifugation antivibrator returns to rated speed scope further through the work process damping motor speed of above-mentioned introduction.Centrifugation antivibrator
Its damping force or brake force can be changed by the rigidity of the position of adjustment centrifugal-block 16, spring 18.
In the present invention, during water pump assembly normal work, the electromagnetic clutch 20 of damping unit 7 separates, and damping unit does not rise
Effect, when water pump assembly power-off termination of pumping, electromagnetic clutch 20 adhesive of damping unit 7 connection centrifugation antivibrator, and by from
Heart antivibrator applies braking moment to motor shaft, thus extending the time of positive rotary speed reduction and the speed reversal increasing of water pump assembly
Plus time and the speed reversal that controls water pump assembly it is ensured that water pump reverse rated speed or any rotating speed setting it
Interior, and then reduce the water hammer pressure in pipeline, realize to the speed reversal of water pump assembly, the control of reversing time and reduce pipeline
The dual safety protection of water hammer pressure.
Other parts in the present embodiment adopt prior art, will not be described here.
Embodiment 2
A kind of centrifugal pump termination of pumping safety protecting method, it is that setting damping unit is connected with the Pump Shaft of water pump assembly,
When water pump assembly works, described damping unit is inoperative, and when water pump assembly power-off termination of pumping, described damping unit is to water pump
Main shaft applies braking moment to limit the speed reversal of water pump assembly, realizes water pump assembly protection and protecting water hammer.
As Fig. 2, Fig. 4, shown in Fig. 5, be a kind of structural representation of centrifugal pump termination of pumping safety device, it includes machine
Frame 8, the motor 1 being arranged in frame 8 and water pump 5, water pump 5 is centrifugal pump.In the present embodiment, water pump 5 goes out axle construction for two ends
Form, the inner side shaft 4 of water pump 5 is coupled with the inner side shaft 2 of motor 1 by shaft coupling 3, and the outside shaft 9 of water pump 5 couples
Damping unit 7.The structure phase of the version of damping unit 7 in the present embodiment and the damping unit 7 described in embodiment 1
Same, will not be described here, the front end of electromagnetic clutch 20 of damping unit 7 is connected with the outside shaft 9 of water pump 5.
In the present embodiment, damping unit 7 is to be realized to water pump by applying brake force to the Pump Shaft of water pump assembly
The speed reversal of unit, the control of reversing time and the dual safety protection reducing pipeline water hammer pressure.
Other parts in the present embodiment are same as Example 1, will not be described here.
Embodiment 3
A kind of centrifugal pump termination of pumping safety protecting method, it is Pump Shaft and the motor of setting damping unit and water pump assembly
Main shaft connects, and when water pump assembly works, described damping unit is inoperative, when water pump assembly power-off termination of pumping, described damping
Device applies braking moment to limit the speed reversal of water pump assembly to the Pump Shaft of water pump assembly and electric machine main shaft, realizes water
Pump assembly protection and protecting water hammer.
As Fig. 3, Fig. 4, shown in Fig. 5, be a kind of structural representation of centrifugal pump termination of pumping safety device, it includes machine
Frame 8, the motor 1 being arranged in frame 8 and water pump 5, water pump 5 is centrifugal pump.In the present embodiment, motor 1 and water pump 5 are and singly go out
Axle construction form, is provided with driver between the union end of the union end of the inner side shaft 2 of motor 1 and the inner side shaft 4 of water pump 5
Structure 11, described drive mechanism 11 can be gear drive or belt gear or chain-drive mechanism or variator, described
The input of drive mechanism 11 is coupled with the inner side shaft 2 of motor 1 and the inner side shaft 4 of water pump 5 by shaft coupling 3 respectively, institute
The outfan stating drive mechanism 11 is coupled with damping unit 7.The version of damping unit 7 in the present embodiment and embodiment 1
Described in damping unit 7 structure identical, will not be described here, the electricity of the output shaft of drive mechanism 11 21 and damping unit 7
The front end connection of magnet clutch 20.Drive mechanism 11 can arrange supporting structure according to actual needs.
In the present embodiment, damping unit 7 by drive mechanism 11 by brake force pass to water pump assembly Pump Shaft and
Electric machine main shaft, the Pump Shaft to water pump assembly and electric machine main shaft apply braking moment, thus realizing the reversion to water pump assembly
Speed, the control of reversing time and the dual safety protection reducing pipeline water hammer pressure.
The present embodiment is applied to the big water pump assembly of speed reversal after accidental shutdown, and it is suitable to may be selected according to actual needs
Gear ratio increases the brake force of centrifugation antivibrator.
In order to ensure to use safety, outside described each drive mechanism, protective cover can be provided with.
Other parts in the present embodiment are same as Example 1, will not be described here.
Above-described embodiment is only used for that the present invention will be described, is not limited, those skilled in the art exists
Change also can be made, for example: the motor of water pump assembly and water pump can also be all provided with by the present invention on the basis of the embodiment of the present invention
It is set to two ends shaft version, the outside going out axle head and motor in the outside of water pump goes out axle head and is respectively mounted the embodiment of the present invention
Damping unit 7 described in 1, during water pump assembly termination of pumping, damping unit applies braking moment to Pump Shaft and electric machine main shaft simultaneously
To limit the speed reversal of water pump assembly.Again for example: the motor of water pump assembly and water pump can also be disposed as two by the present invention
Bring out axle construction form, the outside going out axle head and motor in the outside of water pump goes out axle head and is respectively mounted described in the embodiment of the present invention 1
Damping unit 7, drive mechanism as described in example 3 above is set between water pump and motor simultaneously, during water pump assembly termination of pumping,
Each damping unit applies braking moment to limit the speed reversal of water pump assembly to Pump Shaft and electric machine main shaft simultaneously.Additionally,
Damping unit in the present invention can also adopt other structures form of the prior art.
The present invention cannot be only used for the security protection of centrifugal pump, it is can also be applied to the speed limit of the hydraulic turbine.
Claims (6)
1. a kind of centrifugal pump termination of pumping safety protecting method, is characterized in that: the Pump Shaft of setting damping unit and water pump assembly and/
Or electric machine main shaft connects, when water pump assembly works, described damping unit is inoperative, when water pump assembly power-off termination of pumping, institute
State damping unit and braking moment is applied to limit the reversion speed of water pump assembly to the Pump Shaft of water pump assembly and/or electric machine main shaft
Degree, realizes water pump assembly protection and protecting water hammer；Described damping unit includes electromagnetic clutch (20) and is connected to described electromagnetism
The centrifugation antivibrator of clutch (20) rear end, described centrifugation antivibrator includes being fixedly mounted on the axle of the rear end of electromagnetic clutch
Movable friction plate (15) on outer brake drum (14) on (19), the axle (19) of rear end being movably mounted to electromagnetic clutch,
Afterburning lever (17), described outer brake drum (14) and movable friction plate (15) cooperation are installed, and rub in outer brake drum (14) and activity
Pad is provided with spring between (15), and described reinforcing lever (17) is at least three, and it is rotatably connected to electromagnetic clutch
On the axle (19) of rear end, each afterburning lever (17) includes connecting into centrifugation bar (22) and the force application rod (23) of l shape, described force
Bar (23) is located at described movable friction plate (15) side；Centrifugal-block is connected on afterburning lever；Described electromagnetic clutch is normally closed type electricity
Magnet clutch.
2. a kind of centrifugal pump termination of pumping safety device, the motor be connected including water pump and with water pump, be is characterized in that: be provided with damping
Device is connected with Pump Shaft and/or electric machine main shaft, and described damping unit includes electromagnetic clutch (20) and is connected to described electricity
The centrifugation antivibrator of magnet clutch rear end, described centrifugation antivibrator includes the axle (19) being fixedly mounted on the rear end of electromagnetic clutch
On outer brake drum (14), be movably mounted to electromagnetic clutch the axle (19) of rear end on movable friction plate (15), afterburning
Lever (17), described outer brake drum (14) and movable friction plate (15) cooperation are installed, in outer brake drum (14) and movable friction plate
(15) it is provided with spring between, described reinforcing lever (17) is at least three, and it is rotatably connected to the rear end of electromagnetic clutch
Axle (19) on, each afterburning lever (17) includes connecting into centrifugation bar (22) and the force application rod (23) of l shape, described force application rod
(23) it is located at described movable friction plate (15) side；Centrifugal-block is connected on afterburning lever；Described electromagnetic clutch is normally closed type electromagnetism
Clutch.
3. centrifugal pump termination of pumping safety device according to claim 2, is characterized in that: described water pump and/or motor are
Two ends shaft version, the electromagnetic clutch (20) of described damping unit is arranged on the outer of Pump Shaft and/or electric machine main shaft
Side goes out on axle head.
4. centrifugal pump termination of pumping safety device according to claim 2, is characterized in that: in Pump Shaft and electric machine main shaft
Union end between be provided with gear drive or belt gear or chain-drive mechanism respectively with Pump Shaft and motor master
Axle couples, described damping unit pass through described gear drive or belt gear or chain-drive mechanism and Pump Shaft and
Electric machine main shaft couples.
5. the centrifugal pump termination of pumping safety device according to Claims 2 or 3 or 4, is characterized in that: described reinforcing lever
(17) it is four being uniformly arranged.
6. the centrifugal pump termination of pumping safety device according to Claims 2 or 3 or 4, is characterized in that: described centrifugation bar (22)
It is provided with the centrifugal-block (16) of adjustable position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410123340.3A CN103867457B (en) | 2014-03-28 | 2014-03-28 | Centrifugal-pump stopping safety protection method and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410123340.3A CN103867457B (en) | 2014-03-28 | 2014-03-28 | Centrifugal-pump stopping safety protection method and device |
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| CN103867457A CN103867457A (en) | 2014-06-18 |
| CN103867457B true CN103867457B (en) | 2017-01-25 |
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| CN105090053A (en) * | 2015-09-14 | 2015-11-25 | 云南大红山管道有限公司 | Variable segmented shutoff valve for protecting motor reversing rotation |
| CN105387099B (en) * | 2015-12-22 | 2017-02-15 | 扬州大学 | Brake device for high-flow inclined and horizontal water pump units, and application method |
| CN111114564B (en) * | 2020-02-07 | 2021-02-09 | 吕梁学院 | Tipping bucket type mine car convenient to dump based on coal mining |
| CN114508492A (en) * | 2022-03-18 | 2022-05-17 | 杭州水利水电勘测设计院有限公司 | Water pump based on permanent magnet speed regulation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3901457A (en) * | 1971-07-05 | 1975-08-26 | Abu Ab | Arrangement in centrifugal brakes for fishing reels |
| CN2554398Y (en) * | 2001-12-24 | 2003-06-04 | 姚平 | Water pump clutch with uniformly acceleration starting up and uniformly acceleration off function |
| CN102374241A (en) * | 2010-08-17 | 2012-03-14 | 韩飞 | Friction-type centrifugal coupler |
| DE102012211716A1 (en) * | 2011-08-03 | 2013-02-07 | Schaeffler Technologies AG & Co. KG | Clutch device e.g. normally-engaged friction clutch device, for frictional transmission of torque from internal combustion engine to input shaft of transmission for drive train of motor car, has lever element provided with torsion section |
| CN103629105B (en) * | 2013-12-19 | 2016-08-03 | 杜培文 | A kind of centrifugal pump pump-stopping water hammer means of defence and device |
| CN203743018U (en) * | 2014-03-28 | 2014-07-30 | 杜培文 | Centrifugal pump stopping safety protection device |
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