CN2385134Y - Flexible coupling with butterfly diaphragm - Google Patents

Abstract

The utility model relates to a flexible coupling with a butterfly diaphragm, which is composed of a motive flange, a driven flange, a spacing shaft and a butterfly unit body. The utility model obtains flexibility by means of the bending deflection of the butterfly unit body. Independent bodies not connected mutually are formed by folding and riveting the butterfly diaphragm of the butterfly unit system are convenient for the on-scene single assembly, disassembly and repair. The motive flange and the driven flange have two forms of having installing edges and not having installing edges. The butterfly unit bodies are fixed on the installing edges or the end face of the flange by means of pins, screw bolts, etc. The spacing shaft is a drum shaft having a thin wall, the shaft sleeve sections of the motive flange and the driven flange can be all or most permitted to be retracted into the inner cavity of the spacing shaft, in order to cause the coupling to be concurrently used in the conditions of the conventional type and the compact type, so the utility model has the favorable damping performance.

Description

The butterfly diaphragm flexible shaft coupling

" metal laminate thin film butterfly unit body flexible coupling belongs to mechanical transmission fields to full name, is the flexible hitch bar that is used for connecting prime mover rotating shaft and driven machine rotating shaft.Because factors such as the load metamorphism in foozle, alignment error and the machine works, temperature distortion, between two axis that coupling connect, exist inevitably a certain amount of misalign the skew be that radial axis shifted by delta y, axis angle are to shifted by delta alpha axis axial offset delta x (Fig. 1), be referred to as the axis three-dimensional and misalign skew, the flexible ability that promptly can adapt to this skew of coupling is called compensation ability.Flexible coupling must possess enough bearing capacitys and compensation ability simultaneously, could be all the year round transmitting torque safely and reliably.

Prior art ring film coupling (Fig. 2, Fig. 3) (hereinafter to be referred as ring type) its outstanding advantage is: simple in structure, lightly, radially, the angular compensatory ability is big, vibration isolation, good damping result, noise free, exempt to lubricate, be applicable at a high speed, high temperature and corrosive environment is long-lived down, reliably working.Its major defect is: have only a semi-ring limit to bear pulling force in the circular membrane, the bearing capacity deficiency can only be transmitted usually less than 100,000 N.m, torque; The nose balance ability is also less than normal.Someone has conceived compact type ring film coupling scheme (Fig. 4), attempt be used to replace transformation labour just at the compact gear coupling (Fig. 5) of extensive use, run into Three Difficult Issues: 1. the nose balance ability can not show a candle to tooth-like; 2. its maximum load-carrying capacity of ring film made from the standard size material has only 6～70,000 N.m, much smaller than tooth-like N.m levels up to a million; 3. Zui Da difficulty is that maintenance replacing ring film is wanted resolving device, destroys shafting alignment.Thereby promote and be obstructed.

The design's purpose is to provide a kind of butterfly diaphragm flexible shaft coupling, and it has kept the above-mentioned whole advantages of ring type coupling, and its bearing capacity and compensation ability are apparently higher than ring type, and cost is then obviously cheap; With existing gauge material just can satisfy high-speed working condition and in, low-speed heave-load operating mode needs, the routine that both had been suitable for the interband distance is used, and can satisfy nervous space situations again and use, and can also satisfy the demand of transmitting axial force.

The design's technological scheme is: a kind of butterfly diaphragm flexible shaft coupling, it comprises former moving flange [5], driven flange [9], spacing shaft [7] or [8], along the equally distributed plurality of elastic load-carrying unit of circumference---butterfly unit spare [4] and link [1], [2], [17] etc., mutual separate unit body---the butterfly unit body that do not correlate of the elastic carrier of described formation flexible coupling unit body for being formed by stacking with the butterfly-like diaphragm of high strength, every group of butterfly unit body is by 3 holes of multilayer, the superimposed back of 4 holes or 5 hole butterfly diaphragms forms with 2 groups of above riveted joint linings [13] or ball ring [14] riveted.Side opening in the inside and outside both sides of butterfly unit body is borrowed [1], [2], [17] etc. link is connected with former moving flange [5] or driven flange [9] etc., the hole of opposite side borrows pin links such as [2] to link to each other with spacing shaft [7] or [8], butterfly unit body [4], former driven flange [5], [9] and spacing shaft [7], [8] etc. three big important documents constitute butterfly diaphragm coupling assemblies, the former moving flange [5] of described coupling and driven flange [9] have band that the limit form is installed and are not with the two kinds of forms in limit of installing, flange has when the limit is installed, and butterfly unit body [4] is fixed on the installation limit of former moving flange [5] and driven flange [9] by pin [2]; When former, driven flange was sleeve-like (be not with the limit is installed), butterfly unit body [4] directly was fastened on the end face of former moving flange [5] or driven flange [9] by straight pin [17], bolt [1], hold-down ring [18] etc.The spacing shaft of described coupling [7], [8] are the drum thin wall shaft, its internal diameter is slightly larger than the axle sleeve section external diameter of former moving flange [5] and driven method [9], in order to when coupling is used for nervous space, the axle sleeve section of flange [5] and [9] is shunk the inner chamber of spacing shaft [7] into or [8]; Spacing shaft both can be the drum barrel thin wall-type spacing shaft [7] of segmented, placed the periphery of former moving flange and driven flange to make two sleeve-like flanges [5], [9] all be shunk the inner chamber of spacing shaft [7]; Also can be whole drum barrel thin wall-type spacing shaft [8], place on the middle position between flange [5] and [9], when needs satisfy nervous spatial condition, allow the axle sleeve section of flange [5] and [9] to be retracted the into inner chamber of spacing shaft [8], reach compact purpose.

The outstanding advantage of present design is:

1. a series of outstanding advantage of inheriting ring type comprehensively being had (as simple, light and handy, vibration damping, exempt to lubricate, reliably, longevity ... advantage), without exception.

2. under the equal spatial condition, the bearing capacity of butterfly, compensation ability all can reach more than half times of ring type respectively.

3. the diaphragm of butterfly can be used offcut under the equal conditions, its materials consumption even be 1/3 of ring type only, and be easy to stamping-out and be shaped; Spacing shaft [7] and two flanges [5], [9] all available seamless steel pipe manufacturing need not special forging, and the middle and small scale cost of production only is half of ring type.

4. the ring type of making of the standard band, its maximum are held ability only 6～7 * 10 ⁴N.m, and butterfly can bring up greater than 100 * 10 ⁴The huge coupling of N.m.

5. under the nervous spatial condition, ring type will be done the big decomposition operation of equipment in maintenance, when changing diaphragm, consumption worker consuming time, destruction equipment centering, and butterfly only need remove, unscrew the dismounting from the side of relevant pin, bolt, change the butterfly unit body when maintenance, 10～20 minutes only consuming time, do not influence equipment centering level at all.

6. the pin center at its two ends, load-carrying ring limit of ring type diaphragm is in same turning radius; in case meet with not normal, burst, impulsive load; when the fracture of diaphragm ring limit takes place; the pin that can cause encircling the two ends, limit bumps against in twos, causes the chain damage of equipment, and the pin at the carrier bar two ends of butterfly then is in different radiuses of rotation; after meeting with not normal load; diaphragm takes the lead in rupturing, and make coupling be in the drop out of gear state, thereby protection equipment exempts from chain destruction.

7. compare with tooth-like, except that one of nose balance, butterfly radially, angular compensatory ability, bearing capacity, vibration damping, vibration isolation, longevity, exempt to lubricate, cost etc. be better than everywhere tooth-like, tooth-like greasy filth problem, the flank of tooth gummed problem of existing, butterfly does not all exist.

8. unusual part also is to transmit big axial force.

Below in conjunction with drawings and Examples the design is further described:

Fig. 1 is the three direction displacement signal of axle system;

Fig. 2, Fig. 3 are the ring film coupling signal of prior art;

Fig. 4 is in the prior art, and the ring film coupling of attempting being used under the nervous spatial condition is illustrated;

Fig. 5 is compact gear coupling signal of the prior art;

Fig. 6 is a kind of longitudinal profile of butterfly diaphragm flexible shaft coupling;

Fig. 7 is a kind of of II-II section among Fig. 6;

Fig. 8 is a kind of longitudinal profile signal of compact type butterfly diaphragm coupling;

Fig. 9 is a kind of of H-H section among Fig. 8 and Figure 10;

Figure 10 is a kind of longitudinal profile of butterfly film coupling;

Figure 11 is a kind of of G-G section among Figure 10;

Figure 12 is the I enlarged view among Fig. 6 Fig. 8 and Figure 10;

Figure 13 is a kind of longitudinal profile that can transmit the butterfly diaphragm flexible shaft coupling of axial force;

Figure 14 is a kind of of B-B section among Figure 10, Figure 13;

Figure 15 is the F-F section of Figure 14;

Among the figure: 1. bolt, 2. pin, 3. protective housing, 4. butterfly unit body (assembly), 5. former moving flange, 6. self-locking nut, 7. spacing shaft, 8. spacing shaft, 9. driven flange, 10. three hole butterfly diaphragms, 11. 5 hole butterfly diaphragms, 12. spacer rings, 13. the riveted joint lining, 14. ball rings, 15. locking plates, 16. distance ring, 17. straight pins, 18. hold-down rings, 19. four hole butterfly diaphragms, 20. supporting disks, 21,23. circlip for hole, 22. bearing support, 24. oil storage chambers, 25. blanking covers, 26. seal ring, 27. joint shaft bearings, 28. filter cores, 29 bar shaped diaphragms, 30. lock washers, 31. stage clips, 32. spacer sleeve, 33. the butterfly diaphragm, 34. enlarging riveted places provide the lightening core of big free gap on 35. spokes.

Embodiment 1, see Fig. 6, Fig. 7, Fig. 9, Figure 12, be a kind of butterfly diaphragm coupling that spacing is vertically arranged of routine, by not with former moving flange [5] and driven flange [9], 3 hole butterfly unit bodies [4] [10] or formations such as 3 big important documents such as 5 hole butterfly unit bodies [4] [11], drum spacing shaft [8] and link that the limit is installed.Each butterfly unit body by rivet lining [13] more than 2 groups, ball ring [14] becomes butterfly unit body [4] with butterfly diaphragm [10] or [11] enlarging riveted of some size shape unanimities; Straight pin [17] one by one behind location on the respective end face of former moving flange [5] or driven flange [9], will be screwed into each butterfly unit body [4] respectively with 2 groups of bolts [1] of hold-down ring [18] in the corresponding aperture of flange [5] and [9] and with locking plate [15] and lock; The former moving flange [5] that will have butterfly unit body [4] connects back fastening with one group of pin [2] and self-locking nut [6] with spacing shaft [8], distance ring [16] and protective housing [3]; The driven flange [9] that will have butterfly unit body [4] with same program connects with fastening with spacing shaft [8], distance ring [16], protective housing [3].Butterfly unit body decomposing program at the scene is: 1. remove whole pins [2] and nut [16] on the coupling outer rim, 2. withdraw from spacing shaft [8] and 2 distance rings from the side, 3. remove locking plate [15] and bolt [1], take out hold-down ring; 4. withdraw from straight pin [17], 5. take out butterfly unit body and protective housing and the butterfly unit body is detected.

Embodiment 2: see Figure 10, Figure 11, Figure 14, Figure 15, be the another kind of conventional flexible coupling that spacing is vertically arranged, former moving flange [5] and driven flange [9], 4 hole butterfly unit bodies or the formations such as butterfly unit body, spacing shaft [8], protective housing [3] and link of intersecting on limit are installed by band.4 groups of riveted joints of 4 hole butterfly unit body and functions lining [13], ball ring [14] and some 4 measure-alike hole butterfly diaphragms [19] are formed, and during combination, after 4 groups of riveted joint linings passed diaphragm hole and ball ring one by one, the butterfly unit body was riveted in enlarging.Each intersect butterfly unit by some measure-alike bar shaped diaphragms [29] and some thickness and bar shaped diaphragm identical distance circle [12], with one after an interleaved mode is overlapped into butterfly, become intersection butterfly unit body with 4 groups of ball rings [14] and riveted joint lining [13] riveted, there be the poor of a slice in the bar shaped diaphragm number of intersection both wings, to guarantee butterfly unit body shape axisymmetricly.During the coupling general assembly, two holes borrow pin [2] to be connected mutually with spacing shaft [8] with nut [6] on the butterfly unit body tail fin.Two holes borrow pin [2] and nut [6] to be separately fixed on former moving flange [5] and the driven flange [9] on the butterfly unit body fore wing, former moving flange [5] and driven flange [9] are leaving very big free gap [35] corresponding to the fixing nut of butterfly unit body tail fin [6] position, do not hinder the free activity of nut before and after up and down.

Embodiment 3: see that Fig. 8, Fig. 9, Figure 12 are a kind of of compact type butterfly diaphragm coupling, by with the former moving flange [5] that the limit is installed and driven flange [9], 3 hole butterfly unit body [4] segmented spacing shaft [7] the three big important documents of etc.ing and link formation, have 4 obvious characteristics: 1. not with the sleeve-like flange [5] on installation limit, [9]-the provide essential condition of shortening coupling length for the compact type coupling.2. 3 hole butterfly unit bodies that do not correlate mutually-adorn at the scene for the compact design scheme, tear open, local overhauling, replacing butterfly unit body become a reality possibility.3. the means of fixation of butterfly unit body on flange [5], [9] is to have ensured that from structure shearing stress and impacting force that coupling is acted at work born respectively by straight pin [17] and bolt [1], be that straight pin [17] only bears shearing stress, bolt [1] mainly bears clamping (stretching) stress.Make the stress dispersion and provide adequate condition for decomposing the butterfly unit body from side direction under the near condition.4. the spacing shaft of segmented [7]-facilitate for connection installation, the centering of device on complete sets of equipment.As different from Example 1: 3 hole butterfly unit bodies [4] with the single hole on the tail fin with insert stage clip [31] and straight pin [17] successively after the antithesis hole on flange [5] or [9] end face is aimed at, after all in place, place hold-down ring [18] and be screwed into all bolts [1] and locking more successively along Zhou Suoyou butterfly unit body.

On-the-spot program of decomposing the butterfly unit body is: 1.. remove all pins [2] and nut [6] on the outer rim.2.. unscrew to encircle in (needn't remove) and go up all bolts [1].3.. be screwed into special-purpose gadgets from the tapped hole that pressure ring is reserved, promote the stage clip [31] that straight pin [17] is oppressed its place ahead, make straight pin [17] break away from butterfly unit body tail fin hole, hook goes out detection of butterfly unit body do and maintenance from the side.

Embodiment 4: see Figure 13, Figure 14, Figure 15, be a kind of double butterfly diaphragm flexible shaft coupling that can transmit axial force: technical measures are to set up a pair of ball pivot-joint shaft bearing [2] in the coupling center portion, the centre of sphere of bearing drop on intersect butterfly unit body [4] the axisymmetric plane in the heart, be fixed on flange [5] or [9] with circlip [21] after 2 bearing supports [22] clamping of the axial symmetry of joint shaft bearing [27] outer ring quilt, the inner ring of bearing [27] is bearing in the projecting shaft inside of supporting disk [20], matching gap is arranged therebetween, allow axial stretching, so that make nose balance, the outer rim of supporting disk [20] is connected with spacing shaft [8] with pin [2], the projecting shaft inside of supporting disk [20] is oil storage chamber [24], be provided with blanking cover [25], seal ring [26] and circlip [23], be stored in ointment in the chamber through pore filter core [28], flow to the slidingsurface of bearing [27] lentamente, for lubricated required all the year round.The existence of joint shaft bearing not only makes the alternating stress that acts on the butterfly unit body reach optimal allocation, avoids stress to concentrate and do change slightly just making the big axial force of this flexible coupling transmission.

During machine works, coupling internal torque transfer route is: primary shaft → former moving flange [5] → pin [2] or bolt [1] and straight pin [17] → butterfly monomeric unit body [4] → pin [2] or bolt [1] and straight pin [17] → spacing shaft [7] or [8] → another group pin [2] or bolt [6] and straight pin [17] → organize separately butterfly unit body [4] → pin [2] or bolt [6] and cylinder [17] → driven flange [9] → driven shaft.Direct relation does not take place between the flange of spacing shaft and two rigidity [5] and [9], one shear deformation, displacement, vibration and power are all transmitted via flexible butterfly unit body and are absorbed, i.e. the Δ x of coupling, Δ y, the compensation of Δ α three-dimensional relies on the resiliently deformable of butterfly unit body to realize: nose balance Δ x is shared by the resiliently deformable of each butterfly unit body on 2 plane of rotation; Radial compensation Δ y changes into angular compensatory Δ α 1 and is superimposed with after the angular compensatory amount Δ α 2 again, is out of shape by the angular flexibility of the butterfly unit body on two plane of rotation and realizes.

Claims (4)

1. butterfly diaphragm flexible shaft coupling, it comprises former moving flange [5], driven flange [9], spacing shaft [7] or [8], along the equally distributed plurality of elastic load-carrying unit of circumference---butterfly unit body [4] and link [1], [2], [17] etc., it is characterized in that: separate unit body---the butterfly unit body [4] that mutually do not correlate of the elastic carrier element of described formation flexible coupling for being formed by stacking with the butterfly-like diaphragm of high strength, each butterfly monomer is by 3 holes of multilayer, 4 holes, the superimposed back of 5 hole butterfly diaphragms forms with 2 groups of above riveted joint linings [13] and ball ring [14] enlarging riveted; The spacing shaft of described coupling [7], [8] are the drum thin wall shaft, its internal diameter is slightly larger than the axle sleeve section external diameter of former moving flange [5] and driven flange [9], when needs satisfy nervous spatial condition, allow the axle sleeve section of flange [5], [9] to be retracted the into inner chamber of spacing shaft [7], [8].

2. butterfly diaphragm flexible shaft coupling according to claim 1, it is characterized in that: have on the former moving flange [5] of described coupling and the driven flange [9] when the limit is installed, butterfly unit body [4] is fixed on the installation limit of former moving flange [5] and driven flange [9] by pin [2]; The former moving flange of described coupling and driven flange are not with when the limit is installed, and butterfly unit body [4] directly is fastened on the end face of former moving flange [5] or driven flange [9] by straight pin [17], bolt [1] hold-down ring [18] etc.

3. butterfly diaphragm flexible shaft coupling according to claim 1 is characterized in that: set up 2 ball pivots in coupling central authorities---joint shaft bearing [27], the centre of sphere of bearing drop on butterfly unit body [4] the axisymmetric plane in the heart, be fixed on flange [5] or [9] inside with circlip [21] after 2 bearing supports [22] clamping of the axial symmetry of joint shaft bearing [27] outer ring quilt, the inner ring of bearing [27] is bearing on the projecting shaft of supporting disk [20], the outer rim of supporting disk [20] is connected with spacing shaft [8] with pin [2], the projecting shaft inside of supporting disk [20] is oil storage chamber [24], and filter core [28] is arranged on the wall of chamber.

4. butterfly diaphragm flexible shaft coupling according to claim 1 is characterized in that: there be the poor of a slice in the bar shaped diaphragm number of the intersection both wings of intersection butterfly unit body, guarantees butterfly unit body shape axisymmetricly.

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