RU2162420C2 - Coupling with elastic blocks (design versions) - Google Patents

Abstract

FIELD: transport engineering; road vehicles; diesel locomotive drives. SUBSTANCE: proposed coupling with elastic blocks has two coupling members with holes accommodating elastic elements installed coaxially on shaft. Coupling has also even number of elastic elements, at least six. Coupling members are connected by means of projections and slots in form of corners, with equal even number of projections and slots, at least four. Support part of coupling is made in form of two replaceable bushings, one being nested in the other and made in form of hollow cylindrical cup. One of bushing in secured on shaft, and the other, on adapter of outer coupling member. Bushing are installed with clearance to provide displacement relative to each other. EFFECT: increased service life of diesel locomotive and reliability of its operation under heavy conditions. 4 cl, 3 dwg

Description

 The proposed technical solution relates to mechanical engineering, namely to the installation of power mechanisms of vehicles.

 Known coupling containing two coaxially mounted on the shaft of the coupling half, interconnected by means of protrusions and grooves having the shape of an angle, respectively made on them, and the teeth are located in horizontal sections of the grooves.

 / A.C.SSSR N350998, MKI F 10 D 1/10 from 2.06.71 /.

 The disadvantage of this clutch is its unreliability in the conditions of heavy duty in the drive of the auxiliary mechanisms of the locomotive, the inability to compensate for significant torsional vibrations of the drive and shaft displacement.

The closest in technical essence and the achieved result is a coupling consisting of two half-couplings with holes in which elastic bars are made made in the form of holes. / Kudryavtsev V.N. Machine parts. M.: Mechanical Engineering, 1980, p. 438 /
The disadvantages of such a clutch are the unreliability of operation in heavy duty conditions, the inability to compensate for significant torsional vibrations of the drive and shaft displacement.

 All this leads to the replacement of the drive after 1-1.5 years of operation of the diesel locomotive and unplanned repairs of the diesel locomotive.

This proposal is aimed at increasing the service life of the drive of the auxiliary mechanisms of the diesel locomotive and its reliability in heavy duty / transmission of more than 200 hp, at 3000 rpm in conditions of temperature fluctuations from -60 ^o C to +100 ^o C due to exclusion listed disadvantages.

 The technical result is achieved due to the fact that the coupling with elastic bars, containing half-coupling coaxially mounted on the shaft with holes in which the elastic bars are located, moreover, contains an even number of at least 6, and the supporting part of the coupling is made in the form of two replaceable bushings , one of which is located in the other, having the shape of a hollow glass, one of which is mounted on the shaft, and the other on the adapter of the outer coupling half, while the bushings are installed with a gap and can be moved relative to each other a.

The coupling is characterized in that the elastic elements are made of a material operating in a temperature mode from -60 ^o C to + 100 ^o C.

 The second variant of the coupling with elastic bars is characterized in that the half-couplings are interconnected by means of protrusions and grooves having the shape of corners, respectively, and contain an even and equal number of at least 4, and the protrusions are located in the longitudinal sections of the grooves, and the elastic elements are located in the nests between the teeth and the shell.

 Figure 1 presents the drive of the auxiliary mechanisms of the locomotive, a General view; figure 2 is a General view of the coupling of the first embodiment; in FIG. 3 is a general view of a clutch of the second embodiment.

 The auxiliary machinery drive consists of a drive shaft 10, with a coupling 9 fixed to it, connected at one end through a spacer ring to the diesel shaft, and the other through a gearbox 7 with a flange 8 and with a synchronous exciter 1, as well as with driven shafts 2, on which clutches 5 are fixed with flanges 4, which are connected to the hydraulic drive of the refrigerator fan 6; 3 - intermediate support.

 In FIG. 2 shows a General view of the coupling with elastic bars 18, consisting of a housing 12, a cover 13, a centering sleeve 14 with interchangeable sleeves 15 and 16; and the sleeve 16 is mounted on the adapter 17 of the shaft 2.

 Figure 3 presents a General view and section along AA of the second variant of the coupling with elastic bars 25 and two identical coupling halves: the drive 20, mounted on the shaft 10, connected to the shaft of the diesel 11 through the spacer ring 19 and the driven 21, connected to the flange 8 of the gearbox 7 / Fig. 1/. The casing 26, mounted on the leading coupling half 20 with bolts 27, keeps the elastic bars 25 from falling out; in the driven coupling half 21, a centering sleeve 22 is installed with a replaceable cylindrical sleeve 23, in which a sleeve 24 is mounted, mounted on the shaft 10.

 These couplings are interchangeable, as they can work on driven shafts and on drive shafts.

Concrete example
Drive shaft coupling
number of control bars - 12
borehole diameter - 6 mm
bar taper - 28
number of teeth - 6
Output shaft coupling
number of control bars - 6
borehole diameter - 9 mm
bar taper - 45
Sectional dimensions of the sleeve 24:
R _circle = 25 mm
Chord Length = 20 mm
At the point of contact of two interchangeable sleeves, a pad of up to 1 mm in length is made on the surface of the sleeve 24. This increases the life of the bushings.

For elastic bars, the rubber mixture B-14-1 / TU 380051166 = 73 is used
Torque from the diesel engine is transmitted through the coupling 9 to the drive shaft 10 of the rear gearbox 7, and then with the help of the driven shafts 2 / splined shafts, which can be from 1 to 3 depending on the distance between the units / with elastic couplings 5 is transmitted to the hydraulic actuator 6 of the fan refrigerator and further on to the fan wheel. The presence of an intermediate support depends on the length of the shaft and its diameter.

 This drive can be used both from the side of the refrigerator, and from the side of the generator. The loads on the generator side are less than on the refrigeration chamber side. The differences will be in the diameter of the couplings, in the number of elastic bars, in the size of the holes in them, in the number of grooves and protrusions in the coupling.

 The proposed couplings rigidly fasten the shafts, while maintaining their mobility due to the mobility of the replaceable bushings relative to each other, which allows you to balance the emerging dynamic moments and reduce their level by 3-6 times, reduce labor costs for servicing the drive by 2-2.5 times, increase the overhaul time of the locomotive is 3-3.5 times.

 This allows you to repair the drive with the replacement of the supporting parts and shock absorbers only when the diesel locomotive undergoes factory repair, i.e. after 6 years of operation of the locomotive.

 The manufacturing technology of large-diameter couplings is associated with the complexity of manufacturing a mold for casting half couplings. Since the design of the outer and inner coupling halves is the same / the 2nd variant of the coupling /, they are cast in one mold, that is, the labor costs for manufacturing the mold are halved. This is an additional advantage of the proposed solution.

Claims (4)

 1. The coupling with elastic bars, containing two coaxially mounted on the shaft of the coupling half with holes in which the elastic elements are located, characterized in that it contains an even number of elastic elements equal to at least 6, and the supporting part of the coupling is made in the form of two replaceable bushings, one of which is located in another, having the form of a hollow cylindrical glass, one of which is mounted on the shaft, and the other on the adapter of the outer coupling half, while the bushings are installed with a gap and can be moved relative to each other a friend. 2. The coupling according to claim 1, characterized in that the elastic elements are made of material operating in a temperature mode from -60 to +100 ^o C.  3. A coupling with elastic bars, comprising two half-couplings coaxially mounted on the shaft with holes in which elastic elements are located, characterized in that the half-couplings are joined together by means of protrusions and grooves having the shape of corners, respectively, and containing them even and identical an amount equal to at least 4, and the protrusions are located in the longitudinal sections of the grooves, and the elastic elements are located in the nests between the teeth and the shell, and the supporting part of the coupling is made in the form of two replaceable bushings, one of which is located in another, having the form of a hollow cylindrical cup, while one of them is mounted on the shaft and the other on the adapter of the outer coupling half, while the bushings are installed with a gap and can be moved relative to each other. 4. The coupling according to claim 3, characterized in that the elastic elements are made of material operating in a temperature mode from -60 to +100 ^o C.

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