GB2201363A

GB2201363A - Mounting of a machine on a stand

Info

Publication number: GB2201363A
Application number: GB08801855A
Authority: GB
Inventors: Gunter Neuhaus; Wilfried Wengorz; Emil Aschenbruck
Original assignee: MAN Gutehoffnungshutte GmbH
Current assignee: MAN GHH Immobilien GmbH
Priority date: 1987-02-27
Filing date: 1988-01-28
Publication date: 1988-09-01
Anticipated expiration: 2008-01-28
Also published as: SE466617B; GB8801855D0; CH676876A5; DE3706389C1; GB2201363B; SE8800481L; SE8800481D0

Description

A J Z 1 - 22'01363 MOUNTING OF A MACHINE ON A STAND The present invention

relates to a method of mounting a machine in a settable position-on a stand, especially a rotary power machine or a processing machine.

During setting-up of rotary power machines and processing machines, such as axial compressors, radial compressors, gears, motors, turbines and so forth, mounting lugs of the machine housing are mounted on supports of a base frame. A bearing surface of a base plate of the stand is usually machined on a portal milling machine. Limits in respect of the base plate machining result from the endeavour to build increasingly larger machines and thus base plates of larger area, i.e. a machining on a gantry milling machine is not possible above. a certain size of the base plate.

Moreover, machining costs are very high in the case of smaller units using precision milling machines.

Consideration has therefore been given to more economical solutions, in particular by simplification of machining of the bearing surfaces and thereby reducti on in transit times in production and in costs.

It has already been proposed (DE-PS 35 23 868) to leave the upper side of the mounting lug support of the machine stand and the underside of a mounting lug shim unmachined. At least three aligning screws were then arranged at the underside of the shim and upright flat steel bars, which were welded to the support and the shim, were arranged at three or more sides of the shim. This welded construction,-however, was dependent on precise welding work and often required a finishing - treatment.

v 1k In an alternative solution, the intermediate space between base plate and mounti'ng lug was filled with cast epoxide resin. Due to the limited temperature stability, however, this solution was not applicable to, for example, the mounting of gas turbines.

A distancing arrangement is disclosed in US-PS 1 380 347, i.e. an arrangement for the-orienting and mounting in which slant position compensation between machine and stand is performed with use of two plates, one having a convex underside and the other plate a concave upper side. The hei-ght adjustment is carried out with a wedge, which has an elongate hole so as to be effective in only one plane.

The manufacture of equipment for this arrangement is expensive in view of the plates for compensation of the slant position, namely the plate with a convex underside and the plate with a concave upper side. Moreover, a third element is needed for the compensation of the height position.

There is thus a-need for a play-free mounting of a machine in conjunction with a simple method of alignment and with fulfilment of the criteria of usability without temperature limitation, minimisation of fitting operations during final assembly, compensation for the slant position between the stand and the machine with the saving of milling operation, and height compensation during mounting of the machine on the stand.

According to a first aspect of the present invention there is provided a method of mountin"g a machine _in a settable position -on a stand, the method comprising the steps of disposing two wedge-shaped washers one above the other and between two mutually facing bearing surfaces respectively of the machine and the stand, setting the 1 1 T -,k- 4 1 orientation of the machine relative to the vertical by rotation of at least one of the washers, and setting the height of the macM ine by relative linear displacement of the washers.

In this method,position setting is achieved with just one pair of wedgeshaped washers with a dual function, namely adjustment of slant position and adjustment of height. A play-free mounting may thus be obtained with elements which are relatively economic to;manufacture.

In a preferred example of the method of the invention, the method serves for the aligning and mounting of a rotary power machine or a processing machine on a stand, the. machine and stand including a welded base frame with machine supports, base plates, bearing plates with fitting keys and central screws for the connection of machine housing mounting lugs with the stand. With the aid of two wedge-shaped-washers, which are disposed one above the other and are arranged between the base plate and the bearing plate, correction of the spatial slant position is effected through rotation of the washers and height compensation is effected through displacement of the washers in the zero position planes. Preferably, each machine support with the base plate machined at the bearing side is welded to the base frame, and the bearing plate with shim and fitting key is secured to the machine housing mounting lugs by clamping means comprising a central bolt which can receive an assembly aid in the form of a spacer sleeve and retaining -member. The pair of washers is laid, in the lowest parallel state, on the bearing surface of the base plate, whereupon the machine is placed in position by its mounting lugs, aligned with the use of an auxiliary device and mounted free of play by means of the washers.

1.1 4 The mounting is secured by tightening the clamping means so that the bearing plate, washers and base plate are arrested, the assembly aid being removed.

For preference, every angle in the range of W' to twice the angle of inclination-of the wedge-shaped washers is settable through rotation of the washers as well as through rotation of, for example, the upper washer on the lower washer.

According to a second aspect of the invention there is provided an assembly comprising a stand, a machine mounted on the stand, and two wedge-shaped washers disposed one above the other and between two mutually facing bearing surfaces respectively of the machine and the stand, at least one of the washers being rotatable to set the orientation of the machine relative to the vertical and the washers being relatively linearly displaceable to set the height of the machine.

In a preferred embodiment the machine and stand include a welded base frame with machine supports, base plates, bearing plates with fitting keys and -central screws for the connection of machine housing mounting lugs with the stand.

For preference, the two wedge-shaped washers, with a central cut- out, are arranged above the machined base plate of each machine support and the bearing plate, which is disposed thereabove and connected with the machine housing mounting lug, the mutually touching washers having the same angle of inclination and being rotatable radially and displaceable axially.

According to a third aspect of the present invention there is provided an assembly according to the second aspect of the invention in combination with lifting means for exerting a lifting force on the 0 1 1 T k..

machine to permit relative movement of the washers, the lifting means comprising a spacer sleeve and retaining member mountable on a clamping bolt of the clamping means and a lifting jack operable to apply the lifting force to the retaining member and the spacer sleeve.

Preferably, the lifting means comprises the spacer sleeve, a retaining nut and a -screw jack, the last-mentioned being co-operable with an intermediate base of the stand.

By means of a method exemplifying the present invention, the machining of base plates on a gantry milling machine is redundant and, for orienting the machine on the stand, a rapid and exact adaptation of slant position and height is possible during final assembly.

An example of the method and an embodiment of the assembly of the present invention will now be more particularly described with reference to the accompanying drawings, in which:

Fig. 1 is a cross-section of part of an assembly embodying the invention, showing a machine of the assembly in its final mounted position on a stand of the assembly; and Fig. 2 is a cross-section of the assembly, at right angles to the section of Fig. 1, showing a phase in setting the position of the machine on the stand.

Referring now to the drawings, there is shown part of a machine housing with mounting, lugs 20 and part of a stand with welded supports 19, on ly one 1 ug 20 and one support 19 bei ng i I I ustrated. The supports, which are manufactured as convenient units, each carry a base or support plate 14, an upper bearing surface of which can be machined on a small milling machine. Subsequently, the supports 19 are wF--Ided 51 - 6 to a base frame (not shown). Since these welding seams are relatively distant from the bearing surface of the plate 14, there is unlikely to be any influence on the planeness of the plate 14. However, an equal height position and parallelism of the individual supports and their base plates cannot be guaranteed in view of the base frame distortion caused by the welding, so that height position and slant position of th e machine must be compensated for.

For this purpose, arranged between each plate 14 and machine housing lug 20 is a respective pair of wedge-shaped washers 1 and 2.

The two washers have equal angles of inclination or wedge angles and are not fixed in the external shape due to their function.

Any angle between 0' and twice the wedge angle of the washers can be set through rotation of, for example, the upper washer 1 on the lower washer 2. If the two washers are rotated As a unit, then is any slant position within the limits of the afore-mentioned angular range can be set.

Height adjustment is achieved by displacement of the individual washers, within the limits imposed by central apertures therein and a bolt 7 passing therethrough, in the zero position plane (sectional plane with full wedge angle).

To facilitate ad 1 justment of slant position and height, handles 3 are provided on the washers 1 and 2.

In performance of a method exemplifying the invention, after the stand with base frame and supports 19 has been produced, the machine and stand ar-e prepared for mounting. A mounting plate 4 with a shim 6 and a fitting key 5 is fastened to each lug 20 of the machine housing by means of the central bolt 7, a washer 8 and a nut 9. An assembly Ir 1 - 7 aid, in the form of a spacer tube 15 and a retaining nut 16, is also mounted on each bolt 7.

The planeness of the bearing surface at the plate 14 is checked by Way of a lithographic image and the pair of washers 1 and 2, provided with the handles 3, is laid in the lowest parallel state on the plate 14. A screw jack, consisting of a bolt 17 and nut 18, is placed on an intermediate plate 21 of the support 19.

The machine with the plates 4 is then placed on the washers on the plates 14 of the stand. Orienting of the machine is performed with the aid of the screw jacks, which allows relative and/or conjunctive rotation of the washers of each pair and also relative rectilinear displacement of the washers, the latter displacement serving to adjust the distance cldesignated in Fig. 1. After the orienting, the plates 4 and 14 and the washers are brought into contact free of play. The assembly aids and jacks are removed and each pair of washers].and 2 is tightened together by way of the central bolt, a ball pan-10, a ball washer 11 and a nut 12. Subsequently, the orientation of the machine is checked and the handles 3 are removed. Finally, holes are drilled through the plates 4 and 14 and the washers and conical pins 13 are inserted in the holes. Finally, the play between each lug 20 and the associated washer 8 is checked.

k

Claims

1 A method of mounting a m-achine in a settable position on a stand, the method comprising the- steps of disposing two wedge-shaped washers one above the other and between two mutually facing bearing surfaces respectively of the machine and the stand, setting the orientation of the machine relative to the vertical by rotation of at least one of the washers, and setting the height of the machine by relative linear displacement of the washers.

2. A method as claimed in claim 1, comprising the preliminary steps of arranging clamping means to extend through the washers, mounting means of the machine and support means of the stand and exerting a lifting force on the machine to permit relative movement of the washers and the further step of tightening the clamping means to clamp the washers, mounting means and support means together after setting of the orientation and height of the machine, the step of disposing the washers comprising initially arranging the washers to provide the lowest available height of the machine.

3. A method as claimed in claim 2, the clamping means comprising a bolt and the step of exerting a lifting force comprising applying the force to a spacer sleeve and a retaining member placed on the bolt.

4. A method as claimed in any one of the preceding claims, wherein the washers a re so-arranged as to permit adjustment of the orientation of the machine relative to the vertical by any angle in the range C to the sum of the wedge angles of the two washers through relative rotation of the washers. the direction of any inclination of the S I 1 w P 1, IS - 9 machine to the vertical being adjustable through rotation of the washers together.

5. A method as claimed in claim 1 and substantially as herei-n'before described with reference to the accompanying drawings.

6. - An assembly comprising a stand, a machine mounted on the stand, -and two wedge-shaped washers disposed one above the other and between two mutually facing bearing surfaces respectively of the machine and the stand, at least one of the washers being rotatable to set the orientation of the machine relative to the vertical and the washers being relatively linearly displaceable to set the height of the machine.

7. An assembly as claimed in claim 6, wherein the wedge angles of the two washers are substantially equal.

8. An assembly as claimed in either claim 6 or claim 7, wherein each of the washers is provided with a central aperture for reception of clamping means for clamping the washers together.

9. An assembly as claimed in any one of claims 6 to 8, wherein the bearing surfaces are provided on a support plate of the stand and a mounting plate of the machine, the mounting plate being connected to a mounting lug of a housing of the machine.

10. An assembly as claimed in any one of claims 6 to 9, comprising a plurality of such bearing surfaces on the stand and a respective - 10 pair of such washers disposed between each bearing surface of the stand and a respective bearing surface of the machine.

11. An assembly substantially as hereinbefore described with reference to the accompanying drawings.

12. An assembly as claimed in claim 8 in combination with lifting means for exerting a lifting force on the machine to permit relative movement of the washers, the lifting means comprising a spacer sleeve and retaining member mountable on a clamping bolt of the clamping means and a lifting jack operable to apply the lifting force to the 10 retaining member and the spacer sleeve.

13. A comb i nation as claimed in claim 12 and substantially as hereinbefore described with reference to Fig. 2 of the accompanying drawings.

Published 1988 at The Patent Office, State House, 68171 High Holborn, London WC1R 4T.P. Further copies may be obtained from The Patent Office, Sales Branch, St Mary Cray, Orpington, Kent BR5 3RD. Printed by Multiplex techniques ltd, St Mary Cray, Kent, Con. 1/87.

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