Centrifuge and swing bucket rotor
A centrifuge includes a swing rotor. Rotor arms of the swing rotor have recesses into which hangers of the swing rotor at least partially swing in a swung-out state. As a result, the centrifuge container and thus also the centrifuges are more compact, because the swinging-out requires less space. An inertial mass of the swing rotor is reduced due to the recesses provided therein, whereby energy consumption, primarily when starting the centrifuge, is significantly reduced.
1. A centrifuge, comprising:
a swing rotor, the swing rotor having a rotor base body with rotor arms that open into arm branches at outer ends, and are connected to a rotor hub at inner ends for coupling the swing rotor to a drive; and
hangers mounted so as to swing out between two of the rotor arms, the rotor arms having recesses into which the hangers and/or sample containers stored therein swing into in a swung-out state,
wherein two retaining pins are arranged on each of the arm branches and
wherein the hangers include pin receivers matching the retaining pins, the pin receivers and the retaining pins jointly forming pivot bearings, and
wherein the recesses extend along the rotor arms between their inner ends and their outer ends at a distance from the pivot bearings, and
wherein the recesses cover a region of the rotor arms which, with respect to a radius of the swing rotor, is located half-way between an axis of rotation of the swing rotor and a mounting of the hangers.
2. The centrifuge according to claim 1 ,
wherein the hangers are buckets which are provided with lids, and
wherein the lids swing into the recesses when the hangers are in the swung-out state.
3. The centrifuge according to claim 1 , wherein the recesses are configured as grooves.
4. The centrifuge according to claim 1 ,
wherein the recesses have a rounded cross-sectional shape and
wherein the recesses cover a region of the rotor arms that is radially half way between an axis of rotation of the swing rotor and an axis of rotation of the pivot bearings.
5. The centrifuge according to claim 1 , wherein the recesses extend over a length along the rotor arms which is shorter than a distance between the rotor hub and a mounting of the hangers.
6. The centrifuge according to claim 1 ,
wherein the recesses extend over a height across the rotor arms which is smaller than a height of the rotor arms at the recesses, and
wherein the recesses are bounded by upper and lower webs.
7. The centrifuge according to claim 1 , wherein two recesses arranged on different sides of the rotor arms are connected by a through hole.
8. The centrifuge according to claim 1 , wherein the rotor arms have a smaller cross sectional thickness at a location of the recesses than in regions outside the recesses.
9. The centrifuge according to claim 1 , wherein the swing rotor has at least three of the rotor arms and at least three of the hangers mounted between the at least three rotor arms.
10. The centrifuge according to claim 1 , wherein the swing rotor has four of the rotor arms and four of the hangers mounted between the four rotor arms.
11. A swing rotor for a centrifuge, comprising:
a rotor base body with rotor arms that open into arm branches;
a rotor hub for coupling the swing rotor to a drive;
two retaining pins arranged on each of the arm branches; and
buckets mounted so as to swing out between two of the rotor arms,
wherein the buckets include pin receivers matching the retaining pins, the pin receivers and the retaining pins jointly forming pivot bearings,
wherein the rotor arms have recesses into which the buckets and/or sample containers stored therein swing into in a swung-out state, the recesses being arranged at a distance from the pivot bearings, and
wherein the recesses cover a region of the rotor arms which, with respect to a radius of the swing rotor, is located half-way between an axis of rotation of the swing rotor and a mounting of the buckets.
12. The swing rotor according to claim 11 , wherein the recesses are grooves.
13. The swing rotor according to claim 11 , wherein the recesses extend over a length along the rotor arms which is shorter than a distance between the rotor hub and a mounting of the buckets.
14. The swing rotor according to claim 11 ,
wherein the recesses extend over a height across the rotor arms which is smaller than a height of the rotor arms at the recesses, and
wherein the recesses are bounded by upper and lower webs.
15. The swing rotor according to claim 11 , wherein two recesses arranged on different sides of the rotor arms are connected by a through hole.
16. The swing rotor according to claim 11 , wherein the rotor arms have a smaller cross sectional thickness at a location of the recesses than in regions outside the recesses.
17. The swing rotor according to claim 11 , wherein the swing rotor has at least three of the rotor arms and at least three of the buckets mounted between the at least three rotor arms.
18. The swing rotor according to claim 11 , wherein the swing rotor has four of the rotor arms and four of the buckets mounted between the four rotor arms.