CN1023339C - Power saving safety coupling - Google Patents
Power saving safety coupling Download PDFInfo
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- CN1023339C CN1023339C CN 88108545 CN88108545A CN1023339C CN 1023339 C CN1023339 C CN 1023339C CN 88108545 CN88108545 CN 88108545 CN 88108545 A CN88108545 A CN 88108545A CN 1023339 C CN1023339 C CN 1023339C
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Abstract
The present invention relates to a mechanical energy-saving and overload protection device, which belongs to the technical field of mechanical transmission. The shaft coupling is composed of a rotor, vanes, a shell and steel balls, wherein the steel balls are respectively arranged in cavities separated by the vanes; the cavities are enclosed by the rotor and the shell; the rotor is connected with a motor shaft; the shell is connected with a speed reducer or an input shaft of a working machine. The present invention can replace an ordinary shaft coupling so as to realize soft starting of the working machine. The shaft coupling created by the present invention is suitable for machines with load starting. The present invention has the advantages of good starting performance, energy saving and equipment investment saving, and furthermore, the torque to be transferred can be adjusted.
Description
The invention is a kind of mechanical energy-conservation and overload protection arrangement, belongs to the mechanical transmissioning technology field.
The power saving safety coupling of the invention is installed between squirrel-cage asynchronism Wechselstrommotor and working machine or the retarder, replaces common coupling, realizes the soft start of working machine.This coupling is applicable to the machine of bringing onto load starting, as the conveyor roller machine of the aerator in the traveller of blower, water pump, belt comveyer, flight conveyer, stirrer, hoist, oxygen fishpond, boiler grate transmission, sintering mineral powder machine, steel rolling mill and electric motor car, ship etc.
Modern machines much is a full load starting, for example blower and Centrifugal water pump, and moment is very big during starting, and required moment is less relatively during the steady running of starting back.For the ease of starting with avoid starting current excessive and burn motor, generally adopt the much bigger motor of power more required, thereby cause the phenomenon of " low load with strong power " in the long-term running such as blower and water pump than steady running.And for example belt comveyer and sintering machine are in use for a certain reason and laden stops, when starting once more, just need lay down load, take a lot of work for fear of time-consuming, often match the much bigger motor of power, thereby also cause the phenomenon of " low load with strong power " in the long-term operation.These situations have all reduced circuit power factor, increase power consumption, cause energy waste.For the travelling mechanism of hoist, the inertial resistance square during starting is very big, for the ease of starting, and the general wound AC machine that adopts than squirrel-cage AC motor costliness, and be equipped with starting rheostat, and making the equipment complexity, cost improves, and easy break-down.Many machines when work often because unexpected the overload damaged important component; even burn motor; bring about great losses, though there is safety coupling can protect important spare part unlikely damage when overload of machine at present, itself is damaged safety coupling inevitably.
For this reason, the invention provides a kind of power saving safety coupling, this coupling will be not affixed by the connection diaxon, but come transmitting torque when working by the frictional force that the steel ball of placing in its housing is produced, thereby can make motor under any circumstance all be similar to starting under no load, can make electric motor starting power consumption and starting heating value reduce about 65%, and can realize the even acceleration starting of working machine.Owing to change full load starting into starting under no load, thereby can match and the identical or approximate motor of working machine steady running power, avoided using for starting at present big interconnected cage motor of power to join the un-reasonable phenomenon of the less working machine of power thus, thereby both improved circuit power factor, energy efficient, can reduce cost of equipment again.Because the moment of torsion of this coupling transmission can be regulated, thereby can realize the overload protection again, and not damage any part.
The invention realizes by following manner:
Fig. 1～Fig. 3 is the fundamental diagram of the coupling of the invention.
Fig. 1 remains static for coupling; Fig. 2 is in starting state; Fig. 3 is the run-in synchronism state.
The power saving safety coupling of the invention mainly is made up of rotor 21, blade 3, housing 35 and steel ball 19. Wherein: rotor 21 links with motor shaft, housing 35 links with reducer input shaft or working machine power shaft, blade is between housing and rotor, blade 3 symmetries are installed on the rotor 21, lobe numbers is minimum to be 2, the space that blade 3 encloses rotor and housing is divided into the cavity identical with lobe numbers, after the cavity that steel ball 19 is separated by blade is counted five equilibrium, is divided in these cavitys.
The course of work of the power saving safety coupling of the invention is as follows:
When motor starting, drive rotor 21 by motor shaft, thereby make blade 3 rotations that are installed on the rotor 21, steel ball 19 in blade 3 each cavity of promotion slides along the inner cylindrical surface of housing 35, the resisting moment that acts on this moment on the motor shaft only is steel ball and housing sliding friction torque, therefore, be similar to starting under no load.Rising along with motor speed, steel ball is close to inner walls under action of centrifugal force, the friction torque of steel ball and housing increases gradually, and housing is driven (be to wait and quicken to start) gradually, reach the run-in synchronism state until housing and rotor, this moment, there be not speed discrepancy in rotor and housing.Because moment of torsion is to transmit by the friction of steel ball and housing,, therefore, can controls overload limit moment, thereby reach the purpose of overload protection by the way of regulating the steel ball amount of fill so the amount of fill of steel ball 19 directly influences the size of carry-over moment.Generally, the diameter of steel ball is more than 4mm, and the amount of fill of steel ball is 90% of cavity volume between rotor and housing to the maximum.
Be to adapt to different needs, the power saving safety coupling of the invention can have multi-form, below in conjunction with accompanying drawing, the coupling of three kinds of forms is described:
Fig. 4 is the basic model of power saving safety coupling, is the D-D cutaway view of Fig. 5.
Fig. 5 is the A-A cutaway view of Fig. 4.
Fig. 6 is the power saving safety coupling of band brake wheel type.
Fig. 7 is the power saving safety coupling of belt leather belt wheel type.
In Fig. 4 and Fig. 5, rotor 21 connects with motor reel by key, for preventing that rotor is along the motor reel axial float, available holding screw 20 is fixed, in addition, to leave sufficient space between the right-hand member of rotor 21 and the half a coupler 6, can be for adopting shaft end pressure plate to be fixed; Blade 3 is fixed on the rotor 21 by the collar 4 and screw 13, spring washer 23; Housing 35 is made up of shell 2, left end cap 18, right end cap 5, and screw 10 and spring washer 11 are linked together shell 2 and left and right end cap 18,5. Between rotor 21 and left and right end cap 18 and 5 bearing shell 14 is housed, bearing shell 14 adopts interference fit with left and right end cap 18 and 5, and adopts matched in clearance with rotor 21. Like this, shell 2, left and right end cap 18 and 5 can relatively rotate with rotor 21 together with bearing shell 14. The right end cap 5 of housing can pass through pin 9, spring washer 22, cydariform resilient sleeve 7 and pad 8 and half a coupler 6 resilient connection, and half a coupler 6 connects with driven shaft (being reducer input shaft or working machine power shaft) by key, and fixing with holding screw 20. According to moment of torsion or the overload limit moment of torsion of required transmission, determine the charging quantity of steel ball 19, the quantity of steel ball 19 is by behind the number of blade five equilibrium, is divided in each cavity that the rotor 21 separated by blade 3 and housing 35 surround. Turn on the plug screw 12 on the shell, and progressively the rotary electric machine axle can be respectively charged into each cavity by the steel ball that five equilibrium is good, tightens then plug screw 12. Before the test run, inject the rubbing surface that an amount of lubricating grease is given bearing shell 14 by the fuel tap 1 on the left and right end cap.
The number of blade 3 be generally two or more than, leave gap a, b, c between blade 3 and shell 2, the left and right sides end cap 18,5, the gap preferably is not more than 1/4 of steel ball size, but is not less than 0.5mm.
When motor starting, motor shaft drives rotor 21 and rotates together with blade 3, and blade 3 promotes steel ball 19 and makes circular motion along the inner cylinder face of shell 2, and steel ball 19 is close to the housing inner cylinder face under the effect of centrifugal force, produce moment of friction, drives housing and rotates; Along with motor speed raises, steel ball centrifugal force increases, and moment of friction rises, and housing 35 drives working machine together with half a coupler 6 and does the even starting of accelerating, and after some seconds, housing 35 reaches synchronously with rotor 21, enters steady operating condition. If the overload that working machine take place to surpass allows or when stuck, then steel ball and housing skid, and do not damage parts, avoid burn-down of electric motor.
When overload is skidded, with screw 16, the bevel friction on the spring leaf 17 that pad 15 and spring washer 24 are fixed on the rotor left side and the left end cap 18 and send sound, thus notify the operator to shut down.
In addition, also available cylindrical steel, iron staff replace steel ball 19, and excellent length should be slightly less than width of blade, and this moment, gap a, b, the c of 18,5 of blade 3 and shell 2, left and right sides end caps preferably were not more than 1/4 of cylindrical rod diameter, and were not less than 0.5mm.
Have groove 31 on the right end cap 5,, use the usefulness (when Installation and Debugging coupling and filling steel ball, needing rotating joint) of hand rotating joint so that insert club or other instrument.
In the occasion (as blower fan, water pump, belt comveyer etc.) of the non-Fraquent start of working machine, bearing shell 14 materials can be cast iron or wear resisting cast iron; At Fraquent start occasion (as conveyor roller, starter motor travelling mechanism), bearing shell 14 materials can be bronze or use rolling bearing instead; During production in enormous quantities, the oil-containing bearing shell that bearing shell 14 can adopt powder metallurgy to make, can cancel the oilhole in fuel tap 1 and the left and right sides end cap 18,5 this moment.
Fig. 6 is the power saving safety coupling of band brake wheel type, and it is applicable to the occasion that needs braking, as crane travel mechanism, and inclination band conveyer etc.Brake drum and driven half-coupling 6 are an integral body, and this structure helps the starting under no load of motor.There is a hole 30 the Brake drum top, is to annotate lubricating grease for the ease of filling valve, and other structure is identical with the basic model of Fig. 4.
Fig. 7 is the power saving safety coupling of belt pulley type, and it is applicable to the bel-drivenn occasion.Rotor 21 links with motor reel, has the v belt groove on the shell 2 or for the cydariform face, vee belt or flat pattern belt is installed in the above, cancels driven coupling 6 parts such as grade this moment.Epitrochanterian plug screw 25 can inject lubricating grease by oilhole from the left side, turns on to be positioned on the left end cap plug screw 12 and can to load steel ball.As replacing steel ball with rod iron, then plug screw 12 can be cancelled, and opens left end cap 18 and can load rod iron (or iron staff), and remaining part is identical with the basic model of Fig. 4.When belt pulley pattern power saving safety coupling was installed, right-hand member should be near motor, can not be opposite, otherwise filling steel ball inconvenience.
The power saving safety coupling of the invention has following advantage:
1. starting performance is good.Power saving safety coupling can make motor under any circumstance all be similar to starting under no load, and starting steadily realizes the even acceleration starting of working machine.Because starting current is little, thereby impact little to electrical network during starting.
2. the saving energy.Power consumption when power saving safety coupling can not only reduce electric motor starting and heating value reach about 2/3, the more important thing is and change full load starting into starting under no load, avoided being generally smooth starting and use the big motor of power to join the phenomenon of " low load with strong power " of the less working machine of power.In long-term operation, because motor rated power and working machine power demand are approaching, coupling rationally, improved power factor, thereby can play obvious energy-saving effect, Fig. 8 is the comparison of this coupling of employing with the current relative value that adopts common coupling, and horizontal ordinate is time (second) among the figure, and perpendicular coordinate is a current relative value.Curve A is common coupling (when a motor rated power＞working power), curve B is power saving safety coupling (when a motor rated power＞working machine power), C is power saving safety coupling (when a motor rated power=working machine power), electric current when D is steady running.
3. saving equipment investment.Because power saving safety coupling has solved the problem of full load starting difficulty, therefore can match lower-powered motor, thereby save cost of equipment, reduced equipment volume and weight.
4. the moment of torsion of Chuan Diing can be regulated, and realizes the overload protection easily.Power saving safety coupling can be by increasing and decreasing the torque limit that the steel ball loading is regulated transmission, to realize the different overloads protections that require.When working machine transshipped or be stuck, power saving safety coupling skidded automatically and does not damage any parts.
5. transmission efficiency height.Compare with fluid coupling, during the power saving safety coupling steady running (except that starting, deboost phase), driving and driven two ends are synchronous fully, no speed discrepancy, no frictional loss, efficient height; Efficiency by inputoutput test is more than 99%.Fraquent start subtracts and test (starting is 75 times in 15 minutes) proves that heating value is very low, does not have obvious temperature rise.
6. simple in structure, easily manufactured, the special-less process requirement.
7. easy for installation, transferring power quality height.Spring element is arranged in the power saving safety coupling, can compensate within the specific limits by the connection diaxon radially, axially and the angle skew, can reduce the centering requirement that is joined diaxon when installing, bring convenience to installation.Elastic element also makes power saving safety coupling have the bumper and absorbing shock performance, can improve the quality and the service life of a machine of transmission of power.
8. can forward and reversely turn round.
9. reliable operation safeguards that letter makes (comparing with fluid coupling).
Claims (8)
1, a kind of power saving safety coupling that is used for mechanism driving, by rotor, blade, housing and steel ball are formed, blade is between rotor and housing, the blade symmetry is installed on the rotor, lobe numbers is more than 2 or 2, blade is divided into the space identical with lobe numbers with the space that rotor and housing are enclosed, it is characterized in that rotor and motor shaft link, housing and reducer input shaft or working machine input shaft link, behind the branches such as cavity that steel ball is separated by blade, be divided in these cavitys, said housing is by a shell and a left side, right end cap is formed, and blade and shell leave gap a between the end cap of the left and right sides, b and c, gap a, b and c are not less than 0.5mm, are not more than 1/4 of steel ball size.
2, coupling as claimed in claim 1, it is characterized in that said rotor connects with motor shaft by key, and Cock screw is fixed, blade pass is crossed the collar, screw and spring washer are fixed on the rotor, a said shell and a left side, right end cap is linked together by screw and spring washer, on a rotor and a left side, bearing shell is housed between the right end cap, bearing shell and left and right sides end cap adopt interference fit, and adopt Spielpassung with rotor, so that shell, left and right sides end cap can relatively rotate with rotor together with bearing shell, the right end cap and the half-coupling of housing pass through pin, spring washer, Peng's shape elastic sleeve and pad carry out resilient connection, half-coupling connects with driven shaft by key, and fix with Cock screw, the screw of the steel ball of packing into is arranged and with the plug screw of its sealing on shell.
3, coupling as claimed in claim 2 is characterized in that said half-coupling is the assemblying body of a half-coupling and Brake drum.
4, coupling as claimed in claim 2 is characterized in that having v belt groove or cydariform face to replace half-coupling on said shell.
5, as claim 1,2,4 and 4 described coupling, it is characterized in that gap between said right end cap and the half-coupling, e=2～10mm.
6, coupling as claimed in claim 5 is characterized in that said steel ball can replace with cylinder rod iron or iron staff, and the length of rod iron or iron staff is slightly less than width of blade.
7, coupling as claimed in claim 6 is characterized in that at the spring sheet of fixing the bevel friction on an energy and the left end cap on the rotor left side.
8,, it is characterized in that bearing shell is the oil-containing bearing shell that adopts powder metallurgy to make as claim 1,2,3 and 4 described coupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88108545 CN1023339C (en) | 1988-12-17 | 1988-12-17 | Power saving safety coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88108545 CN1023339C (en) | 1988-12-17 | 1988-12-17 | Power saving safety coupling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1043549A CN1043549A (en) | 1990-07-04 |
| CN1023339C true CN1023339C (en) | 1993-12-29 |
Family
ID=4835101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88108545 Expired - Fee Related CN1023339C (en) | 1988-12-17 | 1988-12-17 | Power saving safety coupling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1023339C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1082634C (en) * | 1998-02-20 | 2002-04-10 | 张力 | Improvement of couplings with soft starting and of force booster type |
| CN1182333C (en) * | 2001-03-16 | 2004-12-29 | 洪中元 | Centrifugal moment-limiting ball shaft coupling |
| CN104747617B (en) * | 2013-12-31 | 2017-04-26 | 北京新宇航世纪科技有限公司 | Improved device of flexible starting torque coupler |
| CN105650145B (en) * | 2016-04-12 | 2018-08-14 | 吉首大学 | A kind of sine wave shaft coupling with electromagnet |
| CN106195059B (en) * | 2016-08-31 | 2018-04-24 | 德阳立达基础件有限公司 | A kind of soft start steel-ball type safety coupling and its structure computation method |
| CN108972110B (en) * | 2017-10-25 | 2020-06-05 | 杭州富纯实业有限公司 | Steel ball driven torque limiter for electric construction drill equipment |
| CN108223615A (en) * | 2018-02-23 | 2018-06-29 | 李永耀 | flexible speed change clutch soft start transmission device |
| CN110397683B (en) * | 2019-08-19 | 2024-05-10 | 自然资源部天津海水淡化与综合利用研究所 | Safety coupling |
-
1988
- 1988-12-17 CN CN 88108545 patent/CN1023339C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1043549A (en) | 1990-07-04 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |