Drive shaft Operating Instructions BA 42/07

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1 Drive shaft Operating Instructions BA 42/07

2 Contents Contents 1 General Safety labels Safety instructions Specified application Design/Types Drying transformer Drying transformer in furnace Drying transformer in tank Installation of the drive shaft Installation of the drive shaft covering Installation of the guard plate for the horizontal drive shaft Installation of the telescopic protective tube for the vertical drive shaft Installation of the protective tube for vertical drive shaft with isolator Installation of the drive shaft with cardan joints Installation of the drive shaft with cardan joints Installation of the telescopic protective tube for drive shafts with cardan joints (fig. 10) Installation of the drive shaft with insulator NOTE! The product may have been modified after this document went to press. We expressly reserve the right to make changes to the technical data, the design or the scope of delivery. In general, the information provided and the arrangements agreed during processing of the relevant offers and orders are binding. 2 BA 42/07 Drive shaft

3 1 General 1 General 1.1 Safety labels The following safety labels relating to the operation of the drive shaft are used in these operating instructions. These labels must be observed at all times! WARNING! Refers to a potentially hazardous situation that may result in death or severe injury. ATTENTION! Refers to a potentially harmful situation that may result in damage to the the product or adjacent equipment. NOTE! Contains important information and special notes. 1.2 Safety instructions All warnings and safety instructions must be observed at all times! Failure to follow the safety instructions may lead to accidents and severe personal injury. Please read these operating instructions before commissioning the equipment! Please read the operating instructions before putting the drive shaft into service. As the operator, you are responsible for ensuring that users of the equipment have fully understood the operating and safety instructions. Train your staff! Before asking staff to work with the drive shaft, provide training regarding general and special safety instructions and accident prevention regulations. 1.3 Specified application WARNING! Failure to motor drive, on-load tap-changer and transfomer! Installation and commissioning of the drive shaft may only be carried out by qualified, skilled personnel and under strict observation of these Operating Instructions. It is the responsibility of the user to ensure that the drive shaft is used for the specified application only. For safety reasons, do not carry out any unauthorized work, i. e. during installation, modification, commissioning and alteration of the drive shaft without first consulting MR! The trouble-free operation of motor drive, on-load tap-changer and transformer may be put at risk. NOTE! The serial numbers of motor-drive, on-load tap-changer or off-circuit tap-changer, drive shafts and bevel gear must correspond. BA 42/07 Drive shaft 3

4 2 Design/Types 2 Design/Types The drive shaft is the mechanical connection between motordrive and on-load tap-changer head or off-circuit tap-changer head. The change from the vertical to the horizontal direction is performed by the bevel gear (see dimension drawing ). Accordingly, the vertical drive shaft has to be mounted between motor-drive and bevel gear and the horizontal drive shaft between bevel gear and on-load tap-changer or off-circuit tap-changer. The drive shaft is designed as a square tube and is coupled at both ends by two coupling brackets and one coupling bolt to the driving end of the drive shaft ends of the unit to be connected. ATTENTION! When mounting the drive shaft make sure that the shaft ends to be connected are exactly aligned. Otherwise the trouble-free operation of the motor-drive and the onload tap-changer off-circuit tapchanger cannot be guaranteed. Minor axial displacement can be tolerated as long as it does not exceed 35 mm per 1000 mm square shaft length (that corresponds to 2 ). Square tubes, coupling brackets, coupling bolts, screws, and locking washers are corrosion-resistant. We therefore recommend not to apply the same external coating to these parts as to the transformer tank. The square tubes and the vertical guard plate are supplied in overlengths (graded standard lengths). These parts must be cut to the correct length when mounted on the transformer. In rare cases the inner tube of the telescopic protective tube has to be cut. Graded standard lengths of square tubes, see table 1 Standard length Motor-drive Manual drive not admissible 1) Maximum total shaft length of the drive - last pole = 15 m! Table 1 1) l> 2000 only possible for vertical installation without shaft protection! Telescopic protective tubes for manual drives with vertical dimensions V1>2462 should be delivered vertically, similar to the motor drive unit with intermediate bearing. 3 Drying transformer 3.1 Drying transformer in autoclave CAUTION! If drying the transformer in a autoclave, the drive shaft must not be dried as well. 3.2 Drying transformer in tank If you are drying the active part in the transformer tank, the drive shaft may remain attached to the transformer during drying. 4 BA 42/07 Drive shaft

5 4 Installation of the drive shaft 4 Installation of the drive shaft Proceed for installation as follows (see fig. 1): ATTENTION! Check to make sure that the motor protective switch is tripped before starting the coupling procedure, otherwise the motor drive can start up accidentally. Determine dimension A between the two shaft ends. Cut the square tube to the dimension LR = A - 9 mm. Deburr the cut. Loosely attach one coupling piece (2 coupling brackets) with 4 screws M6 x 25/w. s.10 and 4 locking washers and slide it onto the square shaft up to the dead stop. Tighten the screws with a torque of 9 Nm. See section 5.2 for installation of the telescopic protective tube! NOTE! Grease the coupling bolts, the coupling brackets and the ball heads (e. g. with adhesive grease ISOFLEX TOPAS L 32). Insert the coupling bolt into the lower shaft end and slide the square shaft over it together with the coupling piece (fig. 2). Provide the opposite end with a coupling bracket and the coupling bolt. Fit in the square shaft by the end and con-nect it with the second coupling bracket below by 4 self-locking screws M6/w.s. 10 and 4 locking washers. Set an axial clearance of 3 mm between the coupling bolt and the upper coupling piece (fig. 3). Preliminary tightening of the screws at approx. 6 Nm in preparation for the alignment. Carry out final tightening of the screws only after aligning the on-load tap-changer and the motor drive unit (see BA 138, chapter 4.3 "Coupling on-load tap-changer and motor drive"). Tighten the screws M6/w. s. 10 with a max. torque of 9 Nm. NOTE! The middle bore holes of the coupling brackets can be used for lead seals. Set axial clearance of 3 mm at one end! A - Dimension between shaft ends LR - Length of square tube Axial clearance of 3 mm M 2 3 BA 42/07 Drive shaft 5

6 5 Installation of the drive shaft covering 5 Installation of the drive shaft covering ATTENTION! According to IEC standard 60214, all driving shafts located on the outside of the transformer need to be protected with safety coverings. To protect the vertical drive shaft, it needs to be covered with a telescopic protective tube. The horizontal drive shaft needs to be protected with a guard plate. 5.1 Installation of the guard plate for the horizontal drive shaft Proceed for installation of the guard plate as follows (fig. 4): Determine dimension B over the connecting flanges of the housings. Cut down the guard plate to dimension LSB = B - 2 mm, Deburr the cut and protect it against corrosion by a coat of paint. To install the horizontal guard plate (uniform lengths between 400 and 2,300 mm), please pay attention to the following: Slide the guard plate over the connecting flanges on the onload tap-changer and the bevel gear and fasten at each end with a hose clip (5 Nm, fig. 5). 4 A Dimension between shaft ends LSR Length of the extended telescopic protective tubes B - Inside width between the housings LSB - Length of the guard plate LSB = B - 2 MR 5 6 BA 42/07 Drive shaft

7 5 Installation of the drive shaft covering 5.2 Installation of the telescopic protective tube for the vertical drive shaft To install the telescopic protective tube (uniform lengths between 200 and 1150 mm) please pay attention to the following (fig. 6). Determine dimension A (V1 = A + 453) between the shaft end of the ED and the bevel gear. Now shorten the inner tube on the non-slotted side as follows without deforming it. Ensure that it is deburred properly so that it can slide easily in the outer tube: for dimension A = mm shorten inner tube to size 200 (outer tube = 200) for dimension A = mm shorten inner tube to size A + 20 (outer tube = 200) for dimension A = mm use size 700 inner tube without shortening (outer tube = 1150) for dimension A = mm use 1150 size for both tubes without shortening Before the vertical drive shaft is installed, the adapter ring must be located around the bearing neck of the bevel gear and the coupling bolts must be pushed in (fig. 6). Now the two lower coupling brackets must be screwed onto the drive shaft. The two protective tubes (inner tube with slot facing downwards and outer tube pushed over inner tube) must now be pushed over the drive shaft mounted on the driven shaft of the motor-drive unit and this must be aligned with the bevel gear. Push in the upper coupling bolts. Then mount the upper coupling brackets with four self-locking screws (M6 x 25/w. s. 10) to the drive shaft with an axial play of 3 mm. Now attach (5 Nm) the lower protective tube (inner tube) with a hose clip on the bearing collar of the motor drive. Then push the upper protective tube over the adapter at the bevel gear and attach (5 Nm) on both slotted sides with hose clips. 5.3 Installation of the protective tube for vertical drive shaft with isolator The procedure for the installation with isolator is similar to section 4.2, except that in addition to the adapter ring at the bevel gear an insulated spacer ring must be positioned on the bearing collar of the motor drive before the drive shaft is installed. 6 Adapter ring BA 42/07 Drive shaft 7

8 6 Installation of the drive shaft with cardan joints 6 Installation of the drive shaft with cardan joints 6.1 Installation of the drive shaft with cardan joints Installation of the drive shaft with cardan joints is designed as vertical drive shaft between motor-drive and bevel gear. Technically, horizontal design is also possible. To install the cardan joints, please proceed as follows (fig. 10, page 10): The shorter cardan joint supplied must be connected to the ball head of the motor-drive unit via cardan joint bolts. The second cardan joint with O-ring must be fitted to the bevel gear. If a cardan joint is fitted to the upper gear unit, a cardan joint with an inner hub diameter of 25 mm must be used. The cardan joint bolt is secured (5 Nm) with the hose clip on the expansion bellows. NOTE! Make sure that the position of the opposite cardan joint straps corresponds! Do not allow the expansion bellows to be damaged when the cardan joint folds up. Provisionally connect the loose shaft ends of the joints to a piece of angle bar and align (fig. 7). Determine dimension A between the shaft ends. Cut down the square tube shaft to LR = A mm and deburr the cuts BA 42/07 Drive shaft

9 6 Installation of the drive shaft with cardan joints NOTE! Grease the coupling bolts, the coupling brackets and the ball heads (e. g. with adhesive grease ISOFLEX TOPAS L 32). Mount lower coupling brackets loosely on the square tube. Mount coupling bolt(s). Put in square tube and push completely down so that no axial play remains between coupling bolt and coupling bracket. Screw both coupling brackets with 4 self-locking screws M6 x 25/w. s.10) and 4 locking washers with a tightening torque of 9 Nm (fig. 8). This securely connects (no clearance) end of shaft and coupling piece. See section 6.2 for installation of the telescopic protective tube! Provide the upper shaft end with a coupling bolt. Connect the square tube and the shaft end by 2 coupling brackets and 4 self-locking screws M6 x 25/w. s.10 and 4 locking washers (fig. 9). Set an axial clearance of 3mm at one end between the coupling bolts and upper coupling brackets. Preliminary tightening of the bolts at approx. 6 Nm in preparation for the alignment. Carry out final tightening of the screws only after aligning the on-load tap-changer and the motor drive unit (see BA 138, chapter 4.3 "Coupling on-load tap-changer and motor drive"). Tighten the screws M6/w. s. 10 with a max. torque of 9 Nm. ATTENTION! By the correct coupling of motordrive and on-load tap-changer or off-circuit tap-changer you ensure that the on-load tap-changer is sure to switch over before the motordrive stops so that the position of the on-load tap-changer or off-circuit tap-changer and motor-drive are the same in any operating position. Otherwise there is a danger to motor-drive, on-load tap-changer and transformer. BA 42/07 Drive shaft 9

10 6 Installation of the drive shaft with cardan joints 6.2 Installation of the telescopic protective tube for drive shafts with cardan joints (fig. 10) Before beginning installation, each of the two telescope tubes must be shortened to dimension A/ mm (A is the dimension between the ends of the cardan joint). The adapter (item 1) on the bearing collar of the ED and the adapter (item 4) of the bevel gear must be mounted. Now slide the deburred and shortened (according to chapter 5.1) square tube over the upper cardan joint end as far as it will go. Before finishing installation, the following components have to be threaded from below onto the square tube, following the sequence as per description: 1. upper rotary protective tube (item 5), with the long end of the tube pointing up 2. adapter (item 3) 3. outer tube (item 7), with the slit side pointing down 4. inner tube (item 6) Now slide the adapter (item 2) and the lower rotary protective tube (item 5) with the long end of the tube pointing up over the inner tube. Bevel gear Set axial clearance of 3 mm at one end! LR = A LR A - Length of square tube - Distance between shaft ends Pos. Designation Unit 1 Adapter ring d82 x Adapter ring d87 x Adapter ring d92 x Adapter ring d71 x rotary protective tube 2 6 inner tube 1 7 outer tube 1 8 hose clip Motor-drive BA 42/07 Drive shaft

11 6 Installation of the drive shaft with cardan joints Mount a screw clamp on the square tube in order to avoid that the components slide off during the installation of the coupling brackets of the shaft tubes. To finish the installation of the telescope tube all the above mentioned components must be tightened. Proceed from top to bottom. For this purpose be sure that the plastic adapters are located on the respective end of the rotary protective tube and that the telescope tube is only slid into the upper or the lower rotary protective tube as far as the adapter is wide (item 3). Slide the rotary protective tube over the adapter (item 4) between the protective tube and the bevel gear. Then fit the adapter (item 3) between the rotary protective tube and the outer tube and secure the protective tube on both sides with hose clips (5 Nm, item 8). The installation of the lower protective tube between the ED and the inner tube has to be carried out with an adapter (item 2) and two hose clips (item 8). 1. Slide the rotary protective tube over the adapter (item 1) between the protective tube and the motor drive unit. 2. Fit the adapter (item 2) between the rotary protective tube and the inner tube. 3. Secure (5 Nm) the protective tube on both sides with hose clips. At the end, secure (5 Nm) the two telescope tubes towards each other with a hose clip. BA 42/07 Drive shaft 11

12 7 Installation of the drive shaft with insulator 7 Installation of the drive shaft with insulator A model with insulator of the vertical drive shaft is available (fig. 11) for insulating installation of the drive shaft. The insulator can also be used in connection with the joint shaft (fig. 12). Type with insulator ( max. = 2 ) Type with insulator ( max. = 20 ) from from BA 42/07 Drive shaft

13 M Bevel gearing Dimension drawing The direction of rotation is defined during ordering. BA 42/07 Drive shaft 13

16 Maschinenfabrik Reinhausen GmbH Phone Falkensteinstrasse 8 Fax Regensburg, Germany sales@reinhausen.com BA 042/07 EN 02/12 F

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