CN102810935B - Over-speed protector for ventilator of traction motor - Google Patents
Over-speed protector for ventilator of traction motor Download PDFInfo
- Publication number
- CN102810935B CN102810935B CN201210268865.7A CN201210268865A CN102810935B CN 102810935 B CN102810935 B CN 102810935B CN 201210268865 A CN201210268865 A CN 201210268865A CN 102810935 B CN102810935 B CN 102810935B
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- force
- force transmiting
- rotating shaft
- dish
- transmiting disk
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- 230000001012 protector Effects 0.000 title abstract 5
- 230000005540 biological transmission Effects 0.000 claims abstract description 21
- 238000013016 damping Methods 0.000 claims abstract description 6
- 238000009423 ventilation Methods 0.000 claims description 43
- 230000001681 protective effect Effects 0.000 claims description 11
- 230000003137 locomotive effect Effects 0.000 abstract description 9
- 239000004677 Nylon Substances 0.000 description 10
- 229920001778 nylon Polymers 0.000 description 10
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 208000034423 Delivery Diseases 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses an over-speed protector for a ventilator of a traction motor. The over-speed protector comprises two force transmission disks connected through a rope, the two force transmission disks are sleeved on two rotating shafts respectively, an elastic component is pressed in front of each force transmission disk, a locking device is arranged in front of each elastic component and fastened on each rotating shaft, the rear end face of each force transmission disk is squeezed by a damping power disk, each damping power disk is fixedly connected with the corresponding rotating shaft, and the force transmission disks and the elastic components are in running fit with the corresponding rotating shafts. By the aid of the tension change mechanism of a soft rope rotating transmission mechanism, the ventilator can be automatically protected from over-speed; and when faults are eliminated, the over-speed protector enables a transmission device to restore the function of normal transmission of rotating force of the ventilator. The over-speed protector is applicable to protection of the ventilator of the locomotive traction motor.
Description
Technical field
The present invention relates to diesel locomotive traction electric machine ventilation blower technical field.
Background technology
On railway locomotive, locomotive running gear drives by traction electric machine and realizes locomotive operation, and traction electric machine needs wind cooling temperature lowering to use safely to guarantee traction electric machine, on locomotive, be therefore configured with mechanically operated traction electric machine ventilation blower.Usual employing provides the traction electric machine ventilation blower of rotary power by diesel engine of locomotive machine driving.As shown in Figure 1, in figure, the axle of right part is the line shaft of Diesel Engine Mechanical transmission, the axle of figure left part is the axle of traction electric machine ventilation blower, two axle heads install identical force transmiting disk and flake down post 6 respectively, middle to be flexible coupling transmitting rotary power by nylon rope, to be flexible coupling and effectively to overcome two rotating shaft out-of-alignment errors.This structure effect when diesel engine runs is fine, and transferring power makes traction electric machine ventilation blower avoid impacting and realizes soft rotation.When the fault that diesel engine generation rotating speed is out of control, then ventilation blower also can be caused hypervelocity to rotate by driving, and generation serious consequence makes ventilating vane fracture even to fly out by centrifugal action ventilation blower is destroyed.Usually, as long as diesel engine generation rotating speed hardover failure, ventilation blower all can be scrapped.This is traction electric machine fan drive unsolved problem all the time in prior art.
Why can bring disaster to traction electric machine ventilation blower when diesel engine of locomotive generation rotating speed hardover failure, reason is that ventilation blower connects mechanical-force-transmission to the actuating force from diesel engine by nylon rope, when diesel engine generation rotating speed fault, ventilation blower can be driven speed fling lifting suddenly, cause ventilation blower to exceed design speed, excessive centrifugal force causes ventilating vane to fracture and is destroyed by ventilation blower.
Summary of the invention
Technical problem solved by the invention is to provide a kind of when occurring when the state that diesel engine fault exceeds the speed limit, and can take off the fast traction electric machine ventilation blower protected take off fast protective device to ventilation blower.
The technical solution used in the present invention is that a kind of traction electric machine ventilation blower takes off fast protective device; comprise two force transmiting disks connected by rope; two force transmiting disks are set with in two rotating shafts; suppressed by flexible member before force transmiting disk; be provided with locking device before flexible member, locking device is anchored on rotating shaft, and force transmiting disk rear end face extrudes by damping power plate; dampened power dish and rotating shaft are connected, and force transmiting disk, flexible member all coordinate with axis of rotation.
Flexible member comprises accumulator and pressure adjusting dish, and accumulator is held between force transmiting disk and pressure adjusting dish, and pressure adjusting dish front end is locking device.
Locking device comprises external screw thread and the hold-down nut of rotating shaft front end, and hold-down nut front end is provided with locking nut.
Dampened power dish and force transmiting disk contact-making surface are provided with drag devices.
Drag devices is that the projection that dampened power dish and force transmiting disk contact-making surface are arranged rubs grain.
Force transmiting disk bearing is provided with between force transmiting disk and rotating shaft.Dampened power dish and rotating shaft by spline axial location, and are interference fits.
Thrust bearing is provided with between dampened power dish and the shaft shoulder of rotating shaft.
Rotating shaft is diesel powered axle or traction electric machine ventilation blower force transmission shaft.
Described flexible member, locking device, dampened power dish are all installed on diesel powered axle.
The invention has the beneficial effects as follows, in the process that diesel engine of locomotive rotating speed is out of control, before also not causing ventilation blower damage, control the rotary driving force that fan propeller departs from diesel engine at once, avoid ventilation blower to exceed the speed limit and damage.Utilize the tension variation mechanism rotating tightrope transmission mechanism, make ventilation blower automatically take off speed and carry out self-protection; When after Failure elimination, de-fast protective device can make again transmission device recover the function of normal delivery ventilation blower revolving force.
Accompanying drawing explanation
Fig. 1 is that in prior art, ventilation blower is in transmission connection schematic diagram.
Fig. 2 is that ventilation blower of the present invention is in transmission connection schematic diagram.
Fig. 3 is that traction electric machine ventilation blower of the present invention takes off fast protective device structural representation.
Be labeled as in figure: 1-line shaft, 2-locking nut, 3-hold-down nut, 4-pressure adjusting dish, 5-accumulator, 6-flake down post, 7-force transmiting disk, 8-dampened power dish, 9-thrust plate, 10-bearing, 11-takes off fast body, 12-bearing plate washer, 13-bolt, 14-radial bearing disk, 15-thrust bearing, 16-force transmiting disk bearing, 17-ventilation blower force transmission shaft.
Embodiment
As Fig. 3; traction electric machine ventilation blower of the present invention takes off fast protective device; comprise two force transmiting disks 7 connected by rope; two force transmiting disks 7 are set with in two rotating shafts, suppressed, be provided with locking device before flexible member before force transmiting disk 7 by flexible member; locking device is anchored on rotating shaft; force transmiting disk 7 rear end face extrudes by damping power plate 8, and dampened power dish 8 and rotating shaft are connected, and force transmiting disk 7, flexible member all coordinate with axis of rotation.Wherein two rotating shafts are respectively diesel powered axle 1 or traction electric machine ventilation arbor.Carry out describing for diesel powered axle 1 below, flexible member, locking device, dampened power dish 8 are all installed on diesel powered axle 1.Certain above-mentioned parts also can two rotating shafts all be installed, or are arranged on traction electric machine ventilation arbor.Wherein with towards rope reverse, also namely two force transmiting disks 7 relative be reversed before, after the direction deviated from mutually with two force transmiting disks 7 is.
Under stable state, force transmiting disk 7 and dampened power dish 8 frictional force are enough large, and both synchronous axial system, power transmission is via line shaft 1, dampened power dish 8, force transmiting disk 7, nylon rope, another force transmiting disk 7.When diesel engine speed is out of control, along with diesel engine speed raises rapidly, the tension force that nylon rope 18 transmits also increases rapidly, when the tension force of nylon rope increases to certain numerical value, force transmiting disk 7 is greater than the pressure of flexible member by nylon rope tension force, resilient member contracts, between force transmiting disk 7 and dampened power dish 8, frictional force reduces until be separated from each other, both no longer synchronized rotations, dampened power dish 8 is synchronous with rotating shaft, force transmiting disk 7 and flexible member phase countershaft rotate, interruption of power transmission, and traction electric machine ventilation arbor avoids overspeed rotation.
Arrange locking device before its elastic element, its form can be the external screw thread of rotating shaft front end and hold-down nut 3, and hold-down nut 3 can adjust the pretightning force to flexible member, and hold-down nut 3 front end arranges locking nut 2, prevents hold-down nut 3 from axially collecting together.Locking device also can be the latch through line shaft 1, but its fastness is not as nut, and cannot adjust pressure.
Flexible member comprises accumulator 5 and pressure adjusting dish 4, and accumulator 5 is held between force transmiting disk 7 and pressure adjusting dish 4, is hold-down nut 3 before pressure adjusting dish 4.The wherein function of accumulator 5, rotates for accumulator 5 also power transmission of exerting pressure by the female 3 promotion pressure adjusting dishes 4 of rotary fixing screw and presses to force transmiting disk 7.Accumulator 5 is circle spring or rubber, or original paper of deformation occurs under stress for other.
The function of force transmiting disk 7 and dampened power dish 8: material force transmiting disk 7 and dampened power dish 8 being selected respectively to unlike material, to obtain suitable relative friction coefficient, both contact-making surfaces are also provided with drag devices, as adopted damping material to obtain larger coefficient of friction, dampened power dish 8 and force transmiting disk 7 contact-making surface arrange the protruding grain that rubs, or adaptive concavo-convex surface between two, can play the effect increasing friction.
Number of assembling steps is as follows: pass de-fast body 11 in from right toward left direction by bearing 10 and radial bearing disk 14 by line shaft 1; Then thrust plate 9 and bearing plate washer 12 are arranged on respectively the left end of de-fast body 11 and right-hand member fixing with what realize bearing 10 and thrust bearing 14.
On line shaft 1, dampened power dish 8, force transmiting disk 7, force transmiting disk bearing 16, accumulator 5, pressure adjusting dish 4 are installed successively from left to right; Then fix with hold-down nut 3, then carry out anti-loosening locking with locking nut 2.Wherein pass through axle spline joint transferring power between dampened power dish 8 and line shaft 1, or take integral structure according to space requirement and line shaft 1, between force transmiting disk 7 and line shaft 1, be provided with force transmiting disk bearing 16.Because the situation that de-speed occurs is minority, in order to structure is simply considered, the rotation between force transmiting disk 7 and line shaft 1 also can take the mode of applying coating on both planes of rotation.
First-selected selected accumulator 5, its coefficient of elasticity is determined, coefficient of friction between force transmiting disk 7 and dampened power dish 8 is determined, traction electrical apparatus ventilation blower bears maximum (top) speed and determines, according to the force value between the force transmiting disk 7 that experimental bench is determined and dampened power dish 8, rotary fixing screw mother 3 makes pressure adjusting dish 4 press to accumulator 5, and accumulator 5 promotes force transmiting disk 7 and compresses dampened power dish 8; Until the pressure of force transmiting disk 7 and dampened power dish 8 meets predetermined design of pressure, then on experimental bench, experiment and confirmation setup pressure value meet the requirements.If hold-down nut 3 can be readjusted undesirable and adjust the size with setup pressure value with this.
The operation principle of de-fast protective device: after this cover fan drive has set up force transmiting disk 7 and dampened power dish 8; just possesses the de-fast defencive function to traction electric machine ventilation blower; just the fan drive nylon rope and ventilation blower mandrel connector with de-fast defencive function can be connected, see Fig. 2.
Traction electric machine ventilation blower force transmission shaft 17 traction ventilation blower on the left of nylon rope 18 rotates, and right part is the fan drive with de-fast defencive function, and it drives line shaft 1 by diesel engine by machine driving.When diesel engine generation rotating speed hardover failure, the tension force raising rapidly nylon rope 18 transmission along with diesel engine speed also increases rapidly and drives traction electric machine ventilation blower rotating speed to raise rapidly.When the tension force of nylon rope increases to certain numerical value, force transmiting disk 7 will be subject to the displacement that tension force effect overcomes the pressure generation left direction of ring-like accumulator 5, the displacement of left direction causes separation between force transmiting disk 7 and dampened power dish 8 [by axle spline joint transferring power between dampened power dish 8 and line shaft 1] to cause the power transmitted by dampened power dish 8 to be cut off, and force transmiting disk 7 dallies on force transmiting disk bearing 16.At this moment the de-fast phenomenon produced limits the rotary speed of ventilation blower force transmission shaft 17, thus avoids the consequence of ventilation blower hypervelocity damage.
Claims (4)
1. traction electric machine ventilation blower takes off fast protective device, comprise two force transmiting disks (7) connected by rope, two force transmiting disks (7) are set with in two rotating shafts, it is characterized in that: described force transmiting disk (7) is front to be suppressed by flexible member, be provided with locking device before flexible member, locking device is anchored on rotating shaft, and force transmiting disk (7) rear end face extrudes by damping power plate, dampened power dish and rotating shaft are connected, and force transmiting disk (7), flexible member all coordinate with axis of rotation;
Described flexible member comprises accumulator (5) and pressure adjusting dish (4), and accumulator (5) is held between force transmiting disk (7) and pressure adjusting dish (4), and pressure adjusting dish (4) front end is locking device;
Described locking device comprises external screw thread and the hold-down nut (3) of rotating shaft front end, and hold-down nut (3) front end is provided with locking nut;
Dampened power dish and force transmiting disk (7) contact-making surface are provided with drag devices;
Described drag devices to be dampened power dish (8) with the projection that arranges on force transmiting disk (7) contact-making surface rub grain;
Force transmiting disk bearing (16) is provided with between described force transmiting disk (7) and rotating shaft;
Described dampened power dish (8) is located by spline circumference with rotating shaft.
2. traction electric machine ventilation blower as claimed in claim 1 takes off fast protective device, it is characterized in that: be provided with thrust bearing (15) between described dampened power dish (8) and the shaft shoulder of rotating shaft.
3. traction electric machine ventilation blower as claimed in claim 1 or 2 takes off fast protective device, it is characterized in that: described rotating shaft is diesel powered axle (1) or traction electric machine ventilation blower force transmission shaft (17).
4. traction electric machine ventilation blower as claimed in claim 3 takes off fast protective device, it is characterized in that: described flexible member, locking device, dampened power dish are installed on diesel powered axle (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210268865.7A CN102810935B (en) | 2012-07-29 | 2012-07-29 | Over-speed protector for ventilator of traction motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210268865.7A CN102810935B (en) | 2012-07-29 | 2012-07-29 | Over-speed protector for ventilator of traction motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102810935A CN102810935A (en) | 2012-12-05 |
| CN102810935B true CN102810935B (en) | 2015-01-21 |
Family
ID=47234553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210268865.7A Expired - Fee Related CN102810935B (en) | 2012-07-29 | 2012-07-29 | Over-speed protector for ventilator of traction motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102810935B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105179519A (en) * | 2015-10-21 | 2015-12-23 | 无锡港盛重型装备有限公司 | Distance limiter made from synthetic friction material |
| CN115441411A (en) * | 2022-09-16 | 2022-12-06 | 北京曙光航空电气有限责任公司 | A kind of aviation motor protection device and protection method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4437846A (en) * | 1979-10-23 | 1984-03-20 | Robert Bosch Gmbh | Speed limiting rotary coupling |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS516632Y2 (en) * | 1971-06-19 | 1976-02-23 | ||
| DE3205757A1 (en) * | 1982-02-18 | 1983-08-25 | Robert Bosch Gmbh, 7000 Stuttgart | THREE-PHASE GENERATOR WITH POWERFUL COUPLED FAN WHEEL |
| CN2656088Y (en) * | 2003-09-26 | 2004-11-17 | 上海浪石电动工具有限公司 | Beating type electric spanner anti electric machine rotation blocking device |
| CN201103643Y (en) * | 2007-09-18 | 2008-08-20 | 德阳市利通印刷机械有限公司 | Clutch brake |
-
2012
- 2012-07-29 CN CN201210268865.7A patent/CN102810935B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4437846A (en) * | 1979-10-23 | 1984-03-20 | Robert Bosch Gmbh | Speed limiting rotary coupling |
Non-Patent Citations (1)
| Title |
|---|
| JP昭和48-11283U 1973.02.08 * |
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| CN102810935A (en) | 2012-12-05 |
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Granted publication date: 20150121 Termination date: 20200729 |