CN203743018U - Centrifugal pump stopping safety protection device - Google Patents
Centrifugal pump stopping safety protection device Download PDFInfo
- Publication number
- CN203743018U CN203743018U CN201420147446.2U CN201420147446U CN203743018U CN 203743018 U CN203743018 U CN 203743018U CN 201420147446 U CN201420147446 U CN 201420147446U CN 203743018 U CN203743018 U CN 203743018U
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- centrifugal
- water pump
- shaft
- magnetic clutch
- pumping
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Abstract
The utility model discloses a centrifugal pump stopping safety protection device, which comprises a water pump and a motor which is connected with the water pump, and is characterized in that the centrifugal pump stopping safety protection device is provided with a damping device which is connected with a water pump main shaft and/or a motor main shaft, wherein the damping device comprises an electromagnetic clutch and a centrifugal damper which is connected on the rear end of the electromagnetic clutch, the centrifugal damper comprises an outer brake drum, a moving friction plate and torque levers, the outer brake drum is fixedly arranged on a shaft which is arranged on the rear end of the electromagnetic clutch, the moving friction plate and the torque levers are movably arranged on the shaft which is arranged on the rear end of the electromagnetic clutch, the outer brake drum and the moving friction plate are matched to mount, a spring is arranged between the outer brake drum and the moving friction plate, the torque levers at least have three, and is rotatably connected on the shaft which is arranged on the rear end of the electromagnetic clutch, each torque lever comprises a centrifugal rod and an application rod which are connected to be an L shape, and the application rod is arranged on the side of the moving friction plate.
Description
Technical field
The utility model relates to a kind of centrifugal pump termination of pumping Safeguard, particularly the high-lift aqueduct water pump assembly termination of pumping Safeguard of the long distance of a lot of volts in a kind of Mountain Area.
Background technique
In the high-lift pipeline water delivery engineering of massif head of district distance, water hammer accident be comparatively general phenomenon, especially pipeline discrepancy in elevation big rise and fall, engineering with a varied topography.The example that accident produces is also diversified, and in pumping station system, because power-off or other reasons make the unexpected termination of pumping of water pump, the generation pressure rise in various degree again after declining of the pressure in pressure supply water pipe, causes pump-stopping water hammer.Water hammer accident all can cause disaster in various degree, gently causes pipe burst (being booster), and causing supplies water interrupts, and impact is normal produces and life; Heavy cause to flood and ruin the serious consequence such as pumping plant, pumping station sinking.Under individual cases, also can destroy pipeline 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 comprises and prevents the destruction of water hammer pressure to pressure piping and annex thereof; Prevent that too fast water pump and the motor of causing of unit speed reversal from destroying.For this reason, existing " Code for design of pumping cstations " GB50265-2010 regulation: " centrifugal pump maximum inversion speed should not exceed 1.2 times of rated speed, and the endurance that exceedes rated speed should not exceed 2min." often the protectiving scheme of employing is to adopt hydraulic butterfly valve, buffer valve, control valve for water pump and water pump to install flywheel moment additional at present.When accidental shutdown, hydraulic butterfly valve, buffer valve and control valve for water pump are all first to allow valve in the time of termination of pumping, close rapidly several angle, reduce inflow-rate of water turbine, and when the interior aqueous reflux of pipeline, water pump reversion can be not too fast.Meanwhile, low-angle overcurrent can reduce the protection pipeline that boosts after valve.Installing flywheel moment additional is the inertia by increasing water pump flywheel, the time that the time that after prolongation accidental shutdown, the positive rotary speed of water pump reduces and speed reversal increase.For the aqueduct of large-scale high-lift long distance, after Pump Failure, impeller all will reverse under normal circumstances, still can reverse even if install flywheel moment water pump additional.The obvious Shortcomings part of existing protectiving scheme: 1) increased the investment of water pump assembly or motor; 2) set up and make after inertial flywheel extend the starting time of motor, when serious, cause difficulty in starting; 3) after increase inertial flywheel, also increased water delivery energy consumption, improved the cost of water transfer system simultaneously; 4) after increase inertial flywheel, be forward and backward time and the reduction speed reversal of water pump assembly after relative prolongation accidental shutdown, but speed reversal is uncontrollable.
Summary of the invention
For the above-mentioned defect existing in prior art, the utility model provides a kind of centrifugal pump termination of pumping Safeguard that can limit water pump speed reversal in the time of centrifugal pump termination of pumping, subdue water hammer pressure, it does not need to increase water pump assembly or motor rotary inertia, does not extend the motor start-up time, does not increase water delivery energy consumption yet.
The utility model is achieved by the following technical solution: a kind of centrifugal pump termination of pumping Safeguard, comprise water pump and the motor being connected with water pump, it is characterized in that: be provided with damping device and be connected with Pump Shaft and/or electric machine main shaft, described damping device comprises magnetic clutch and is connected to the centrifugal damper of described magnetic clutch rear end, described centrifugal damper comprises the outer brake drum on the axle of the rear end that is fixedly mounted on magnetic clutch, movably be arranged on the movable friction plate on the axle of rear end of magnetic clutch, afterburning lever, described outer brake drum and movable friction plate coordinate to be installed, between brake drum and movable friction plate, be provided with spring outside, described afterburning lever is at least three, it is rotatably connected on the axle of rear end of magnetic clutch, each afterburning lever comprises and connects into L shaped centrifugal bar and force application rod, described force application rod is positioned at described movable friction plate side.
In the utility model, in the time that water pump assembly is worked, magnetic clutch in damping device is in separated state, motor can normally start, do not increase motor starting time, when water pump assembly power-off termination of pumping, magnetic clutch adhesive, centrifugal damper rotates with Pump Shaft/electric machine main shaft immediately, in the time that water pump speed reversal approaches setting speed, centrifugal damper applies braking moment to Pump Shaft and/or electric machine main shaft, the speed reversal of restriction water pump assembly, reaching the reversion of restriction water pump assembly does not exceed the speed limit, prevent from flying the object of anecdote event, in pipeline, water body refluence has reduced pipeline pump-stopping water hammer pressure simultaneously, realize the object of pipeline pump-stopping water hammer protection, thereby realize restriction and water hammer safety protection to water pump assembly speed reversal.
The setting of the damping device in the utility model can adopt various ways, as adopted the following form that arranges: as described in water pump and/or motor be two ends shaft structural types, the outside that the magnetic clutch of described damping device is arranged on Pump Shaft and/or electric machine main shaft goes out on axle head.The outside that the magnetic clutch of damping device is arranged on Pump Shaft and/or electric machine main shaft goes out on axle head, in the time that water pump assembly is worked, magnetic clutch is in separated state, damping device is inoperative, in the time of water pump assembly power-off termination of pumping, magnetic clutch is inhaled the centrifugal damper of merga pass Pump Shaft and/or electric machine main shaft is applied to braking moment.The outside that described damping device can be arranged on separately Pump Shaft or electric machine main shaft goes out on axle head, also can go out in the outside of Pump Shaft and/or electric machine main shaft on axle head and arrange simultaneously.
Damping device in the utility model can also adopt form is set as follows: between Pump Shaft and the joining end of electric machine main shaft, be provided with gear drive or belt gear or chain drive and connect with water pump spindle and motor shaft respectively, described damping device passes through described gear drive or belt gear or chain drive and connects with water pump spindle and motor shaft.In the time that water pump assembly is worked, magnetic clutch is in separated state, damping device is inoperative, in the time of water pump assembly power-off termination of pumping, magnetic clutch is inhaled the centrifugal damper of merga pass braking force is passed to water pump spindle and motor shaft through above-mentioned driving mechanism, thereby water pump assembly is realized to rotating speed restriction.The above-mentioned form that arranges is suitable for shutting down the water pump assembly that rear speed reversal is large, and described driving mechanism can select suitable velocity ratio to increase the braking force of centrifugal damper according to actual needs.
Described magnetic clutch is Normally closed type magnetic clutch, magnetic clutch power-off adhesive, and energising separates.
In order to ensure the damping of centrifugal damper, described afterburning lever is four that evenly arrange.
In order to ensure the damping of centrifugal damper, described centrifugal bar is provided with the centrifugal-block of adjustable position.
The utility model is simple in structure, use is reliable; it can apply braking moment immediately at centrifugal pump pumping accident; in extending the water pump assembly return time; can control water pump reversing rotating speed within specified or any rotating speed; reduce ducted water hammer pressure, reach the object of the protection of termination of pumping water pump assembly and protecting water hammer.The utility model has been avoided the unfavorable factor of bringing by increasing the rotary inertia of water pump, motor and flywheel in conventional scheme, because the damping device in the utility model rotates not together in the time that water pump assembly is worked, thereby do not increase the load of motor, do not increase energy consumption, motor also can normally start, and can effectively reduce construction investment and reduce water delivery cost.
Brief description of the drawings
Fig. 1 is the utility model embodiment 1 structural representation;
Fig. 2 is the utility model embodiment 2 structural representation;
Fig. 3 is the utility model embodiment 3 structural representation;
Fig. 4 is the structural representation of the damping device in the utility model embodiment;
Fig. 5 is the left view of Fig. 4;
In figure, the 1st, motor, the 2nd, shaft inside motor, the 3rd, coupling, the 4th, shaft inside water pump, the 5th, water pump, the 6th, shaft outside motor, the 7th, damping device, the 8th, frame, the 9th, shaft outside water pump, the 10th, bearing support, the 11st, driving mechanism, the 12nd, protective housing, the 13rd, shell, the 14th, outer brake drum, the 15th, movable friction plate, the 16th, centrifugal-block, the 17th, afterburning lever, the 18th, spring, the 19th, the axle of the rear end of magnetic clutch, the 20th, magnetic clutch, the 21st, the output shaft of electric machine main shaft/Pump Shaft/driving mechanism, the 22nd, centrifugal bar, the 23rd, force application rod, the 24th, spring, the 25th, bearing pin.
Embodiment
Also by reference to the accompanying drawings the utility model is further described below by embodiment:
Embodiment 1
A kind of centrifugal pump termination of pumping safety protecting method; it is damping device to be set be connected with the electric machine main shaft of water pump assembly; in the time that water pump assembly is worked; described damping device is inoperative; in the time of water pump assembly power-off termination of pumping; described damping device applies the speed reversal of braking moment with restriction water pump assembly to electric machine main shaft, realizes water pump assembly protection and protecting water hammer.
As shown in Figure 1, be a kind of structural representation of centrifugal pump termination of pumping Safeguard, it comprises frame 8, is arranged on motor 1 and water pump 5 in frame 8, and water pump 5 is centrifugal pump.In the present embodiment, motor 1 is two ends shaft structural types, and the inner side shaft 2 of motor 1 connects with the inner side shaft 4 of water pump 5 by coupling 3, on the outside shaft 6 of motor 1, connects damping device 7.
As shown in Figure 4, Figure 5, described damping device 7 comprises magnetic clutch 20 and the centrifugal damper that is connected to described magnetic clutch 20 rear ends.Described magnetic clutch 20 adopts flange type, Normally closed type magnetic clutch, is prior art, and it can be by pumping plant 24V or 90V DC power control, magnetic clutch power-off adhesive, and energising separates.The front end of magnetic clutch 20 connects with the outside shaft 6 of motor 1.Described centrifugal damper comprises outer brake drum 14, movable friction plate 15, afterburning lever 17.Outer brake drum 14 is fixedly mounted on the axle 19 of rear end of magnetic clutch 20, its outside installation activity friction plate 15, movable friction plate 15 can move axially along axle 19, between brake drum 14 and movable friction plate 15, be provided with spring 18 outside, movable friction plate 15 can move axially under the effect of spring 18.Outer brake drum 14 and movable friction plate 15 are bowl-shape design, between outer brake drum 14 and movable friction plate 15, can contact cooperation.Afterburning lever 17 is at least three, conventionally can adopt three or four or five etc., by ensureing to be applied equilibrium of forces, set multiple afterburning lever 17 should be evenly arranged, in the present embodiment, afterburning lever 17 is four that are evenly arranged, and it is arranged on the outside of movable friction plate 15.Each afterburning lever 17 comprises and connects into L shaped centrifugal bar 22 and force application rod 23, and afterburning lever 17 is rotatably connected to by bearing pin 25 on the axle 19 of rear end of magnetic clutch 20, and the force application rod 23 of afterburning lever 17 is positioned at described movable friction plate 15 sides.On the centrifugal bar 22 of afterburning lever 17, centrifugal-block 16 is installed, the mounting point of centrifugal-block 16 is adjustable.Between afterburning lever 17 and axle 19, be also connected with spring 24.
Damping device in the utility model be a kind ofly used for controlling, the device of restriction water pump assembly speed reversal, its working principle is: utilize the centrifugal-block 16 driving on afterburning lever 17 that rotates backward of motor shaft itself to rotate, thereby generation centrifugal force, afterburning lever 17 rotates around bearing pin 25 under the effect of centrifugal force, its force application rod 23 contacts with movable friction plate 15 and the outside brake drum 14 of promotion activity friction plate 15 moves, movable friction plate 15 contacts with outer brake drum 14 and produces friction, thereby motor shaft is produced to braking force.In the time that the rotational speed of motor shaft drops to OK range, when the thrust that the thrust of spring 18 and centrifugal-block 16 impose on movable friction plate 15 by afterburning lever 17 balances each other, between movable friction plate 15 and outer brake drum 14, lose friction, motor is no longer subject to frictional force damping, and water pump assembly rotates under rated speed.Otherwise if water pump assembly rotating speed rising overrun, centrifugal damper is got back to rated speed scope by the working procedure damping motor speed of above-mentioned introduction again.Centrifugal damper can change its damping force or braking force by the position of adjustment centrifugal-block 16, the rigidity of spring 18.
In the utility model, when water pump assembly is normally worked, the magnetic clutch 20 of damping device 7 separates, damping device is inoperative, in the time of water pump assembly power-off termination of pumping, magnetic clutch 20 adhesives of damping device 7 connect centrifugal damper, and by centrifugal damper, motor shaft is applied to braking moment, thereby the speed reversal of the time that the time that the positive rotary speed that extends water pump assembly reduces and speed reversal increase and control water pump assembly, guarantee that water pump reversion rotating speed is in rated speed or within the rotating speed of setting arbitrarily, and then reduce ducted water hammer pressure, realize the speed reversal to water pump assembly, the dual safety protection of the control of reversing time and reduction pipeline water hammer pressure.
Other parts in the present embodiment adopt prior art, do not repeat them here.
Embodiment 2
As shown in Fig. 2, Fig. 4, Fig. 5, be a kind of structural representation of centrifugal pump termination of pumping Safeguard, it comprises frame 8, is arranged on motor 1 and water pump 5 in frame 8, and water pump 5 is centrifugal pump.In the present embodiment, water pump 5 is two ends shaft structural types, and the inner side shaft 4 of water pump 5 connects with the inner side shaft 2 of motor 1 by coupling 3, on the outside shaft 9 of water pump 5, connects damping device 7.The structural type of the damping device 7 in the present embodiment is identical with the structure of the damping device 7 described in embodiment 1, does not repeat them here, and the front end of the magnetic clutch 20 of damping device 7 is connected with the outside shaft 9 of water pump 5.
In the present embodiment, damping device 7 is to realize speed reversal, the control of reversing time and the dual safety protection of reduction pipeline water hammer pressure to water pump assembly by the Pump Shaft of water pump assembly being applied to braking force.
Other parts in the present embodiment are identical with embodiment 1, do not repeat them here.
Embodiment 3
As shown in Fig. 3, Fig. 4, Fig. 5, be a kind of structural representation of centrifugal pump termination of pumping Safeguard, it comprises frame 8, is arranged on motor 1 and water pump 5 in frame 8, and water pump 5 is centrifugal pump.In the present embodiment, motor 1 and water pump 5 are single shaft structural type, between the joining end of the inner side of motor 1 shaft 2 and the joining end of the inner side shaft 4 of water pump 5, be provided with driving mechanism 11, described driving mechanism 11 can be gear drive or belt gear or chain drive or speed changer, the input end of described driving mechanism 11 connects with the inner side shaft 2 of motor 1 and the inner side shaft 4 of water pump 5 by coupling 3 respectively, and the output terminal of described driving mechanism 11 connects with damping device 7.The structural type of the damping device 7 in the present embodiment is identical with the structure of the damping device 7 described in embodiment 1, does not repeat them here, and the output shaft 21 of driving mechanism 11 connects with the front end of the magnetic clutch 20 of damping device 7.Driving mechanism 11 can arrange supporting structure according to actual needs.
In the present embodiment, damping device 7 passes to braking force by driving mechanism 11 Pump Shaft and the electric machine main shaft of water pump assembly, Pump Shaft and electric machine main shaft to water pump assembly apply braking moment, thereby realize speed reversal, the control of reversing time and the dual safety protection of reduction pipeline water hammer pressure to water pump assembly.
The present embodiment is applicable to the large water pump assembly of speed reversal after accidental shutdown, can select according to actual needs suitable velocity ratio to increase the braking force of centrifugal damper.
In order to ensure to use safety, described each driving mechanism is outer can be provided with protective housing.
Other parts in the present embodiment are identical with embodiment 1, do not repeat them here.
Above-described embodiment is only for describing the utility model, not be limited, those skilled in the art also can make change on the utility model embodiment's basis, for example: the utility model also can all be set to two ends shaft structural type by the motor of water pump assembly and water pump, the outside that goes out axle head and motor in the outside of water pump goes out axle head the damping device 7 described in the embodiment of the present invention 1 is installed respectively, when water pump assembly termination of pumping, damping device applies the speed reversal of braking moment with restriction water pump assembly to Pump Shaft and electric machine main shaft simultaneously.Again for example: the utility model also can all be set to two ends shaft structural type by the motor of water pump assembly and water pump, the outside that goes out axle head and motor in the outside of water pump goes out axle head the damping device 7 described in the embodiment of the present invention 1 is installed respectively, driving mechanism is as described in example 3 above set simultaneously between water pump and motor, when water pump assembly termination of pumping, each damping device applies the speed reversal of braking moment with restriction water pump assembly to Pump Shaft and electric machine main shaft simultaneously.
The utility model not only can be used for the safety protection of centrifugal pump, also can be applicable to the speed limit of water turbine.
Claims (6)
1. a centrifugal pump termination of pumping Safeguard, comprise water pump and the motor being connected with water pump, it is characterized in that: be provided with damping device and be connected with Pump Shaft and/or electric machine main shaft, described damping device comprises magnetic clutch (20) and is connected to the centrifugal damper of described magnetic clutch rear end, described centrifugal damper comprises the outer brake drum (14) on the axle (19) of the rear end that is fixedly mounted on magnetic clutch, movably be arranged on the movable friction plate (15) on the axle (19) of the rear end of magnetic clutch, afterburning lever (17), described outer brake drum (14) and movable friction plate (15) coordinate to be installed, between brake drum (14) and movable friction plate (15), be provided with spring outside, described afterburning lever (17) is at least three, it is rotatably connected on the axle (19) of the rear end of magnetic clutch, each afterburning lever (17) comprises and connects into L shaped centrifugal bar (22) and force application rod (23), described force application rod (23) is positioned at described movable friction plate (15) side.
2. centrifugal pump termination of pumping Safeguard according to claim 1, it is characterized in that: described water pump and/or motor are two ends shaft structural types, the outside that the magnetic clutch (20) of described damping device is arranged on Pump Shaft and/or electric machine main shaft goes out on axle head.
3. centrifugal pump termination of pumping Safeguard according to claim 1, it is characterized in that: between Pump Shaft and the joining end of electric machine main shaft, be provided with gear drive or belt gear or chain drive and connect with water pump spindle and motor shaft respectively, described damping device passes through described gear drive or belt gear or chain drive and connects with water pump spindle and motor shaft.
4. according to the centrifugal pump termination of pumping Safeguard described in claim 1 or 2 or 3, it is characterized in that: described magnetic clutch is Normally closed type magnetic clutch.
5. according to the centrifugal pump termination of pumping Safeguard described in claim 1 or 2 or 3, it is characterized in that: described afterburning lever (17) is even four of arranging.
6. according to the centrifugal pump termination of pumping Safeguard described in claim 1 or 2 or 3, it is characterized in that: described centrifugal bar (22) is provided with the centrifugal-block (16) of adjustable position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420147446.2U CN203743018U (en) | 2014-03-28 | 2014-03-28 | Centrifugal pump stopping safety protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420147446.2U CN203743018U (en) | 2014-03-28 | 2014-03-28 | Centrifugal pump stopping safety protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203743018U true CN203743018U (en) | 2014-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420147446.2U Expired - Fee Related CN203743018U (en) | 2014-03-28 | 2014-03-28 | Centrifugal pump stopping safety protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203743018U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867457A (en) * | 2014-03-28 | 2014-06-18 | 杜培文 | Centrifugal-pump stopping safety protection method and device |
-
2014
- 2014-03-28 CN CN201420147446.2U patent/CN203743018U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867457A (en) * | 2014-03-28 | 2014-06-18 | 杜培文 | Centrifugal-pump stopping safety protection method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20161205 Address after: 250013 Ji'nan, Lixia District, Shandong Lixia Road, No. 121 Patentee after: Shandong Survey and Design Institute of Water Conservancy Address before: 250013 Ji'nan, Lixia District, Shandong Lixia Road, No. 121 Patentee before: Du Peiwen |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 Termination date: 20180328 |