FIELD OF INVENTION
The present invention relates to a quarter split guide bearing support arrangement with position locking in vertical motors. More particularly the invention relates to a quarter split guide bearing support arrangement for enhancing a high reduction in weight and cost of the bearing assembly.
BACKGROUND OF THE INVENTION
BHEL Bhopal manufactures vertical motors for driving cooling water pump and lift irrigation pumps. The motors are equipped with a top thrust and guide bearing arrangement and bottom guide bearing arrangement. The bearings are submerged in oil. The bearings work on the principle of hydrodynamic lubrication where in load bearing oil film is developed between sliding surfaces. A guide bush is provided on the rotor which is the rotating part. The guide pads or guide bearing is the stationary part. Oil film is formed between these two components. The radial load of the rotor is transmitted through the oil film to guide bearing which in turn transmits to guide bearing support. From the guide bearing support the load is transmitted the bearing bracket and then to stator frame.
The motors are with keyed shaft extension or with flanged shaft extension. The guide bearing support is a single piece item which is assembled from the bottom of the

machine. In case of flanged shaft the diameter of the flange determines the inside diameter of the guide bearing support and subsequently the size of the guide bearing, guide bush and bearing bracket. A larger flange requires all these components to be made bigger which increases weight and cost of the components.
To overcome this issue a novel method of splitting the guide bearing support in four parts and assembling on the bearing bracket with position locking has been developed.
OBJECTS OF THE INVENTION
Therefore, it is an object of the invention to propose quarter split guide bearing support arrangement with position locking in vertical motors, which is capable of reducing the overall size of the bearing assembly preventing increased weight and cost of the components.
SUMMARY OF THE INVENTION
To overcome the issue of bigger size guide bearing support and guide pads in case flanged shaft extension motors a novel method of quarter splitting guide bearing support has been developed. The guide bearing support is first manufactured as a single piece. A plate is rolled and then welded to form a cylinder. Four number

mounting plates are welded to the guide bearing support. The mounting plate is used to connect the guide bearing support to the lower bracket. The inside diameter of the single piece ring is machined to suit guide bearing pivot diameter. Spigot seating is machined on the mounting plate. The mounting plate has two number holes for fixing screws with lower bracket. Two numbers dowel arrangement for position locking are provided on the mounting plate. The guide bearing support is then split into four segments. The segments can now be individually assembled on the lower bracket. The spigot seating on mounting plate of split guide bearing support is matched with recess in the lower bracket and fixed with two fixing screws. The mounting plate is then dowelled together with lower bracket. This prevents rotation of split guide bearing support. The combination of spigot seating and dowel arrangement position locks the split guide bearing support. This arrangement does not require guide bearing support inside diameter to be bigger than the flange diameter there by reducing the overall size of the bearing assembly.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Figure 1 shows the motor with flanged shaft extension;
Figure 2 shows the bearing assembly with split guide bearing support and
position locking;
Figure 3 shows existing guide bearing assembly;
Figure 4 Shows new guide bearing assembly.

DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION
Vertical motor with flanged shaft extension (4) is shown in Fig. 1. Bearing assembly with split guide bearing support (2) is shown in Fig. 2. 3D view of existing guide bearing and new guide bearing is shown in Fig. 3. and Fig. 4 respectively.
Machined guide bearing support (2) is mounted on bearing bracket through spigot seating as shown in Fig. 2. Four groups of two dowel holes (5) Drilled and Reamed φ16 X 50 deep in assembled condition of guide bearing support (2) and
bearing bracket (1) for position locking. After the combined drilling of bearing bracket (1) and guide bearing support (2), marking to be done on guide bearing support (2) and corresponding in bearing bracket (1) and separate out the guide support (2) for making it in quarter split form. After splitting the guide bearing support (2) in four part from single cylindrical guide bearing support, each segment shall mount separately at marked location in bearing bracket (1) and dowelled (5) it at location where previously drilled for locking the guide pad support. Dowelling prevents rotation of split guide bearing support (2) when motor is in running condition. Guide pads (3) are mounted on each guide pad support segment and adjusted separately. Four number mounting plates (6) are welded to the guide bearing support (2). The mounting plate (6) is used to connect the guide bearing support (2) to the lower bracket through the fixing holes

(7). Spigot seating (8) is machined on the mounting plate (6) to match with the recess machined in the lower bracket (1). The bearings, submerged in oil, work on the principle of hydrodynamic lubrication. Oil film (9) is developed between guide pads (3) and a guide bush (10) provided on the rotor. Advantage of this arrangement is that it does not require guide bearing support inside diameter to be bigger than the flange diameter there by reducing the overall size of the bearing assembly.

WE CLAIM
1. Quarter split guide bearing support arrangement with position locking in vertical motors, the said arrangement comprising;
rolling a plate and then welding it in the shape of a cylindrical ring to form a guide bearing support as a single unit;
welding four numbers of mounting plates (6) to the guide bearing support;
machining inside diameters of the single piece ring to suit guide bearing pivot diameter;
machining spigot seating (8) on the mounting plate (6);
making two number of holes (7) on the mounting plate (6);
fixing the mounting plate (6) with bearing bracket (1) through said holes (7) with screws;
providing two numbers dowel holes (5) on the mounting plate (6);
drilling and reaming four groups of 2 dowel holes in assembled condition of guide bearing support (2) and bearing bracket (1) to create position locking;
creating marking after combined drilling and reaming on guide bearing support (2) and corresponding bearing bracket (1) and separating the guide bearing support (2) wherein,

the guide bearing support (2) in the form of a single piece ring is then splitted into four segments, when the said segments (2) are individually assembled on the lower bracket (1) such that spigot seating (8) on mounting plate (6) of split guide bearing support (2) matches with recess machined in the lower bracket (1) and being fixed by fixing screws wherein the mounting plate (6) is then dowelled together with the lower bracket (1) at marked location to prevent rotation of split guide bearing support (2) when motor is in running condition and to lock guide pad support wherein guide pads (3) are mounted on each guide pad support segment and adjusted separately.
2. The arrangement as claimed in claim 1, wherein the drilled and reamed dowel holes are of 16 mm dia., and 50 mm deep.