DK145243B - COMPRESSOR - Google Patents

Description

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The invention relates to a motor compressor of the kind mentioned in the preamble of claim 1. In the known motor compressors, the crank arm is one-piece, which has the disadvantage that the incorporation of the crank drive becomes difficult and that the alignment of the ~ 5 groove eyes becomes quite complicated. The same applies to a known crank structure, which is made up of disc shaped elements joined together in planes perpendicular to the axis.

The motor compressor according to the invention, as characterized in claim 1, has the advantage of the prior art that the shared crank arm makes the assembly of the crank drive quite simple and without difficulty enables alignment of the piston eyes. In addition, the damaging space can be adjusted and the lower crank arm as well as the drive shaft may be the same for different build sizes of the compressor.

15 By the measures specified in the subclaims, advantageous embodiments and improvements are possible.

It is particularly advantageous to design the motor shaft as a pipe with which one part (the lower) of the crank arm is firmly connected.

In the drawing there is shown an embodiment of the compressor according to the invention, which will be explained in more detail below.

FIG. 1 is a longitudinal section through the motor compressor; FIG. 2 is a section along line II-II of FIG. 1, FIG. 3 is a sectional view of an altered portion of FIG. 1, and FIG. 4 the same as FIG. 3, but seen from above.

The motor compressor is housed in a capsule 10 which consists of a lower part 11 and a upper part 12 which are hermetically tightly welded together. An electric motor 13 is provided in the capsule, the stator 14 of which is supported by springs 15 on a base plate 16 arranged in the lower part of the capsule. The springs 15 abut one side against bore-like recesses 17 on the stator 14 against a tapered pin 18 disposed thereon, and on the other side against a corresponding tapered pin 19 attached to the base plate 16. The rotor 19 of the electric motor 13 is arranged. on a tubular shaft 20 guided and mounted in a main bearing 2.

The main bearing 21 is part of a bearing member 22 which is relatively narrow and bridged, and which supports against the stator 14 with two support foot pads 24 and 25 which are diametrically 5 opposite each other. It is attached thereto by screws 26 and 27. The bearing member 22 only spans the upper part of the winding 28 of the electric motor on a narrow area due to its small width, so that this part of the winding is well cooled.

10 On the bearing member 22, the cylinder 30 of the piston compressor 31 is located. X cylinder 30 is provided with a through-hole bore 32, the axis of which is perpendicular to the motor shaft 20. In bore 32, a piston 33 which is tightly adjacent to the cylinder wall can slide. In a known manner, the plunger is connected by means of a plunger wedge 34 to a connecting rod 35, the eye 36 of which rests on the column 37 of the crank.

The crank arm 38 is designed for the weight compensation of the piston drive. It consists of two disc-shaped portions 38 'and 38 ", the outer dimensions of which are exactly the same. , eg. by welding or soldering. After mounting the crank drive, the upper portion 38 'of the crank arm is disposed adjacent to the lower portion 38 "of the crank arm and, after adjustment 25, is firmly connected to the portion 38". This may conveniently be done by welding or soldering or by screw connection 40 as shown in FIG. 3. Instead of the screw connection 40, other fasteners, e.g. riveting. It is also possible to use a bonding of the parts 38 'and 38! "

By appropriately adjusting the parts 38 'and 38 "of the crank arm 38, the damper space of the piston compressor 31 can be adjusted. The shaft 20 and the bottom 38" can be the same for different compressor sizes (building box principle) and only the upper 38' is varied.

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The bearing member 22 may be laid along the X-axis shown, or along the Y-axis perpendicular to the X-axis.