Compressor with simplified balancing and method of manufacturing such a compressor

Abstract

A compressor includes a housing with a first and second area; a motor incorporated into the first area and a diaphragm pump unit incorporated into the second area; the diaphragm pump unit including at least one diaphragm body and a drive unit; an armature of the motor being operatively connected to the drive unit through a drive axle; and the diaphragm pump unit having a first imbalance U1 and the motor having a second imbalance U2, wherein the size of the second imbalance U2 is designed in such a way that the sum of the first imbalance U1 and the second imbalance U2 in the system consisting of the motor and the drive unit coupled with the drive axle statically and dynamically results in zero. A related method for manufacturing the compressor is also disclosed.

Claims

1. A compressor comprising: a housing with a first area and a second area; a motor incorporated into the first area and a diaphragm pump unit incorporated into the second area; the diaphragm pump unit including at least one diaphragm body and a drive unit, the drive unit including a swash plate, an eccentric, and a swash plate axle having a first end joined to the swash plate and a second end joined to the eccentric; the motor including an armature and a drive axle, the armature being joined to the drive axle for rotation therewith, the drive axle having an end operatively connected to the eccentric so that rotation of the drive axle rotates the eccentric, the swash plate axle, and the swash plate around a central axis of the drive axle; rotation of the drive unit around the central axis defining a first imbalance U1, and rotation of the armature and drive axle around the central axis defining a second imbalance U2, wherein a size of the second imbalance U2 is designed in view of the first imbalance U1 in such a way that a sum of the first imbalance U1 and the second imbalance U2 in a system consisting of the diaphragm pump unit and the motor statically and dynamically results in zero; wherein the second imbalance U2 is generated by at least two milled grooves on the armature or by placing at least two local weights on the armature.

2. The compressor according to claim 1, wherein the eccentric has at least one weight.

3. The compressor according to claim 2, wherein the eccentric has two weights, wherein the weights of the eccentric are arranged opposite one another with regard to the drive axle.

4. The compressor according to claim 3, wherein the weights of the eccentric are arranged parallel to the drive axle, the weights being arranged at a distance A from each other.

5. The compressor according to claim 2, wherein the at least one weight of the eccentric is spherical.

6. The compressor according to claim 2, wherein the at least one weight of the eccentric is incorporated into the eccentric.

7. The compressor according to claim 2, wherein the at least one weight of the eccentric is configured to be screwed into the eccentric.

8. The compressor according to claim 2, wherein the at least one weight of the eccentric is integrally formed with the eccentric.

9. A method for manufacturing a compressor according to claim 1 comprising the following steps: providing the diaphragm pump unit having the first imbalance U1; providing the motor; connecting the eccentric to the drive axle to thereby connect the motor to the drive unit; determining the dynamic imbalance of the motor and the drive unit in a connected state; and generating the second imbalance U2.

10. The method according to claim 9, wherein the dynamic imbalance is determined in tests performed on the compressor according to claim 1 or with a simulation.

11. The method according to claim 9, further including the steps of: determining a residual imbalance on at least one compressor manufactured according to the method before designing the second imbalance U2; and setting the second imbalance U2 as a target value using the residual imbalance.

12. The compressor according to claim 1, wherein the at least two milled grooves or the at least two local weights are arranged on opposite sides of the armature with regard to at least one of an x-axis, a y-axis, and a z-axis.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The disclosure will now be explained in more detail with reference to the enclosed drawings, which show:

(2) FIG. 1 is a side diagrammatical view of a compressor according to the state of the art,

(3) FIG. 2 is a diagrammatical side view of a first embodiment of a compressor according to the present disclosure,

(4) FIGS. 3a and 3b are respective top and bottom isometric views of a first embodiment of an eccentric useful with the compressor, and

(5) FIGS. 4a and 4b are respective top and bottom isometric views of a second embodiment of an eccentric with the compressor.

DETAILED DESCRIPTION

(6) FIG. 2 shows a compressor 2 according to the disclosure that differs from the compressor 2 shown in FIG. 1 especially in that milled grooves 28 have been inserted in the armature of the motor 30. With regard to the x-axis, the two milled grooves 28 shown here are arranged on opposite sides. Moreover, the milled grooves are arranged offset along the z-axis, especially symmetrically with regard to the center of the motor. Elements and reference numerals common to the devices of FIGS. 1 and 2 are not repeated herein for brevity.

(7) FIGS. 3a, 3b, 4a, and 4b show embodiments of the eccentric 24. FIG. 3a shows a top view of an eccentric 24 of a first embodiment, FIG. 3b the corresponding view from below. The eccentric 24 has a drilled hole on the top and bottom, dimensioned in each case to receive the drive axle 18 or the swash plate axle 20. A plane running through the axes of the two drill holes forms a symmetry plane of the eccentric. Furthermore, the eccentric 24 has four weights 26, executed here as screw-in weights. Along the z-axis, the weights 26 are kept at a distance A to one another. FIGS. 4a and 4b show a top view of an embodiment of the eccentric 24 and a view from below. In this embodiment, threaded holes for placing two screw-type weights 26 are provided, which are also at a distance A to one another along the z-axis. An imbalance can be selectively achieved by the screw-type weights.

LIST OF REFERENCE SIGNS

(8) 2 Compressor

(9) 4 Housing

(10) 6 First area

(11) 8 Second area

(12) 10 Motor

(13) 12 Diaphragm pump unit

(14) 14 Drive unit

(15) 16 Swash plate

(16) 18 Drive axle

(17) 20 Swash plate axle

(18) 22 Diaphragm body

(19) 24 Eccentric

(20) 26 Weight

(21) 28 Milled groove

(22) 30 Armature

(23) 32 Magnet

(24) 34 Brush

(25) A Distance

(26) U1 First imbalance

(27) U2 Second imbalance

(28) α Angle