Horizontal-axis electrical machine
View Patent ↗A horizontal-axis electrical machine has an built-in stator concentrically surrounded by a number of parallel retaining rings that spaced apart from one another in the axial direction and are connected on their outer circumference on opposing sides in each case by means of retaining structures to a base frame which extends in the axial direction. A horizontally acting spring, which has the form of a perpendicular, longitudinal plate, is fixed on the one hand with its ends to the associated retaining ring, and is firmly connected on the other hand with its freely flexible central part to the base frame by means of connecting elements, being provided within each of the retaining structures. Improved oscillation isolation between the built-in stator and the base frame is achieved in such an electrical machine by vertically acting spring elements disposed between the ends of the spring and the associated retaining ring.
1. A horizontal-axis electrical machine comprising:
a stator;
a plurality of parallel retaining rings concentrically surrounding the stator and axially spaced from each other;
a base frame; and
a plurality of retaining structures connecting an outer circumference of each of the plurality of retaining rings to the base frame at opposing sides,
wherein each retaining structure includes:
a horizontally acting spring including a plate disposed perpendicular and longitudinal with respect to a respective retaining ring of the plurality of retaining rings, the plate having a first end part, a second end part and a flexible central part;
a connecting unit connecting the central part to the base frame;
a first vertically acting spring element disposed between the first end part and the respective retaining ring; and
a second vertically acting spring element disposed between the second end part and the respective retaining ring.
2. The electrical machine as recited in claim 1 , wherein the connecting unit includes a u-shaped retaining element disposed at a right angle on the base frame, and a tubular piece extending horizontally between the spring and the retaining element.
3. The electrical machine as recited in claim 2 , wherein the tubular piece is a rectangular tube.
4. The electrical machine as recited in claim 2 , wherein the tubular piece is welded to the spring and the retaining element.
5. The electrical machine as recited in claim 4 , wherein the retaining element is welded to the base frame.
6. The electrical machine as recited in claim 1 , wherein the respective retaining ring, the first and second spring elements and the spring are connected to one another by welding.
7. The electrical machine as recited in claim 1 , wherein the first and second spring elements extend horizontally between the spring and the respective retaining ring and engage on both sides of the respective retaining ring.