Method for mounting a drive shaft of a compressor

Abstract

The invention concerns a method for mounting a drive shaft (19) of a compressor, particularly a hermetical refrigerant compressor, which has a motor with a stator (1) and a rotor (23), connected with the drive shaft (19) and located in a rotor opening (4) of the stator (1), a first bearing support (8) and a second bearing support (29) being connected with the stator (1), a first bearing (15) for the drive shaft (19) being mounted in the first bearing support (8) and a second bearing (28) for the drive shaft (19) being mounted in the second bearing support (29). It is endeavoured to provide a method for mounting a drive shaft, in which the use of components with relatively large manufacturing tolerances will still result in a good alignment of the drive shaft in relation to the stator. For this purpose, at least the first bearing support (8) is provided with a positioning stop for the first bearing (15) after mounting the first bearing support (8) on the stator (1).

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a Continuation Application of currently pending U.S. application Ser. No. 11 / 135,873 filed on May 24, 2005, which is incorporated by reference herein in its entirety, and claims the benefit of the filing date thereof under 35 U.S.C. §120. The present application also claims the benefit of and incorporates by reference in its entirety essential subject matter disclosed in German Patent Application No. 10 2004 025 678.0, filed on May 26, 2004.FIELD OF THE INVENTION[0002]The invention concerns a method for mounting a drive shaft of a compressor, particularly a hermetical refrigerant compressor.BACKGROUND OF THE INVENTION[0003]Refrigerant compressors have become products manufactured in large numbers, and should therefore be manufactured in the most cost effective manner possible. As, however, refrigerant compressors are practically operating all the year round, the energy consumption of the motor, which is required for dr...

AI Technical Summary

Benefits of technology

[0010]With this method, a uniform air gap between the rotor and the stator is achieved, which can even be heavily reduced. Frictional losses in the bearings are avoided. This also applies, when relatively cheap sheet metal parts are used for the compressor, that is, parts with relatively large manufacturing tolerances. Firstly, the first bearing support is mounted on the stator. This gives the bearing support an unchangeable position in relation to the rotor opening. Then, the positioning stop for the first bearing can be manufactured with a fixed dependence on the position of the rotor opening. Thus, the positioning stop is not manufactured until after the mounting of the first bearing support, but after the manufacturing, it is no longer changed in relation to the rotor opening. When the first bearing is then aligned on the positioning stop, the first bearing has an exact concentrical alignment in relation to the rotor opening.

[0013]It is also advantageous, when a tool is used for manufacturing the positioning stop, at least a part of this tool being located concentrically in the rotor opening. The rotor opening itself is used for centring the tool for the manufacturing of the positioning stop. Thus, it is ensured that the positioning stop has exactly the desired alignment to the rotor opening.

[0016]Preferably, a bearing support is used, whose opening has short measure in relation to the bearing, the opening being extended to the measure of the bearing. When using a punch, this has the advantage that after fixing the bearing support only a fine punch step is required to bring the opening to the final measure. This further simplifies the manufacturing process, as only little material has to be removed, which means that the forces required to manufacture the final opening are smaller.

[0018]Preferably, the second bearing is mounted on the second bearing support, aligned centrically to the rotor opening by means of an auxiliary tool, which is fixed at least two alignment positions on the stator, the second bearing support then being fixed on the stator. Thus, an overcorrection is avoided.

Problems solved by technology

As, however, refrigerant compressors are practically operating all the year round, the energy consumption of the motor, which is required for driving the compressor unit, must be kept as small as possible.

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