Siwing-bucket-rotor for centrifugal separator, and centrifugal separator

Abstract

The invention provides a siwing-bucket-rotor for a centrifugal separator. The sliding resistance of hanging buckets during swinging is inhibited so that poor rotation is eliminated. The siwing-bucket-rotor for a centrifugal separator comprises a rotor body. The rotor body is equipped with a plurality of arms, a plurality of hanging buckets and holding pins. The arms extend from the inner rim to the outer rim. The hanging buckets of the same shape are held on the corresponding arms in a swinging manner for holding samples. The holding pins are arranged on the arms in a way that the pins extend toward the tangential direction of the rotary direction of the rotor body and, are used for holding the hanging buckets in a swinging manner. Two clamping portions supported by the holding pins are arranged on the hanging buckets, and are supported by holding pin shafts. The sliding surfaces of holding pins are configured in a way that the axial width of a contact area when the hanging buckets stop swinging and the axial width of the contact area when the hanging buckets swing to a horizontal position through centrifugal separation operation are not fixed. For instance, the axial width of the contact area when the hanging buckets are static is smaller than the axial width of the contact area when the hanging buckets are rotating.

Description

technical field [0001] The present invention relates to a swing rotor for a centrifuge and a centrifuge, and particularly relates to an improvement in the shape of a holding pin formed on the swing rotor for holding a swinging bucket. Background technique [0002] A swing-out rotor type centrifuge is used for the purpose of blood or urine testing, and a sample container accommodated in a swingable bucket is rotated. For centrifuges with flattened rotors, the maximum speed is mostly from 3000 to 5000 rpm. The swing-out rotor has: a hub extending coaxially with a drive shaft disposed in a centrifugal chamber; a rotor body disposed around the hub; and a plurality of arms extending from the rotor body. The arms are provided in multiple sets of a pair of arms facing each other, and each of the pair of arms rotatably supports a bucket holding a sample container. There are various types of swing rotors, but in general, holding pins are formed on the arms of the swing rotor, and p...

AI Technical Summary

Problems solved by technology

However, in the case of high friction, the bucket sometimes does not swing smoothly, and the worst case is that the bucket stops halfway

In particular, in a centrifuge that automatically loads and takes out sample containers, if the swing of the bucket does not return to the initial position, not only will it cause obstacles to the loading and unloading of the sample container, but it may also cause damage to the sample. Lubricating lubricant must be frequently applied to retaining pins to reduce friction

However, since frequent lubricant coating on the automatic centrifugal device that must work continuously will increase the maintenance time of the device, it is troublesome to implement, and the user is very eager to extend the maintenance cycle as much as possible.

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