JPS58223455A - centrifuge - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a centrifugal separator with an improved support structure for a collector and an inlet for extracting a sample separated by a separation rotor.

FIG. 1 shows a longitudinal cross-sectional view of a conventional centrifuge with a continuous rotor for continuously separating samples;
4 is a separate rotor, a 3-piece collector, and a vertical shaft motor. The motor 4 is supported on a base 7 via a plurality of dampers 5, and a separation rotor 2 is fixed to the upper end of the shaft of the motor 4 at a position inside a cover 12 supported on the base 7 via legs 15. has been done. A cylindrical protrusion 8 having an opening 9 is protruded from the center of the upper surface of the separation rotor 2. Inside the opening 9, an inlet 1 supported in a non-rotating position with a gap δ2 around the periphery is provided. It is installed by drilling a hole in it. Further, the collector 3 is supported in a non-rotating state at the bottom of the cover 12 via an arm 6, and is fitted into the opening 14 of the bottom 13 with a gap δ1 left on the outer periphery of the cylindrical protrusion 8. . The collector 3 is configured to collect the sample (not shown) separated by the separation rotor 2 and discharged from the discharge port 10 formed in the cylindrical protrusion 8.

During centrifugation, the separation rotor 2 is driven to rotate via the motor 4, and when a sample is injected from the injection port 1 as shown by arrow A, the sample advances inside the separation rotor 2 as shown by the arrow and is centrifuged within the separation rotor 2. The supernatant sample is discharged from the discharge port 10 into the collector 3 as shown by arrow B.

ing.

In this case, the separation rotor 2 swings significantly when passing through a critical speed during acceleration, but the sample inlet 1 and the collector 3 are both non-rotating parts. Therefore, the gap δ1 between the opening 14 of the lower bottom 13 of the collector 3 and the cylindrical protrusion 8 of the separation rotor 2 and the gap δ2 between the sample injection port 1 and the opening 9 of the cylindrical protrusion 8 of the separation rotor 2 are large. It needs to be formed. For this reason, the supernatant after sample separation leaks out through the gap δ1, and when the amount of sample injection is increased, the sample does not completely enter the separation rotor 2, but leaks into the collector 3 through the gap δ2. Sometimes I put it away.

The present invention has been developed in view of the above-mentioned circumstances, and it is possible to prevent the supernatant of a sample after centrifugation from leaking from the gap between the separation rotor and the collector, or to increase the flow rate of the sample injected through the injection port. The object of the present invention is to provide a centrifugal separator that can prevent leakage through an opening in the center of the upper surface of a separation rotor.

The centrifugal separator of the present invention includes a vertical shaft motor supported on a base via a damper, a separation rotor fixed to the upper end of the shaft of the motor, and a center portion of the upper surface of the separation rotor supported in a non-rotating position. an inlet that is fitted into the opening of the cylindrical protrusion with a gap around it and installed with the opening facing downward; and a lower bottom part that is supported in a non-rotating position and has a gap around the outer periphery of the cylindrical protrusion. a collector fitted with an aperture formed to collect the sample separated through the separation rotor through an outlet provided in the cylindrical protrusion, the collector and the inlet being fitted; , which is supported by the housing of the motor.

In other words, we focused on the fact that when the separation rotor vibrates after it starts rotating and passes a critical speed, the non-rotating part of the motor housing also vibrates, and we decided to fix the collector and inlet of the non-rotating part to the housing. It is designed so that it vibrates together with the separation rotor, which is a rotating part, so that the gap between the two is made small, thereby preventing the sample from leaking through the gap.

Hereinafter, an embodiment of the centrifugal separator of the present invention will be explained with reference to FIG. 2, where the same parts as those of the conventional one are denoted by the same reference numerals, and the explanation of the same parts will be omitted. FIG. 2 shows a longitudinal cross-sectional view similar to FIG. 6 (the support portion of the inlet 1 is not shown). In addition, the gap a2 in the opening 99.14. δ1 is made smaller than in the conventional case of FIG. When the separation rotor 2 is rotationally driven by the motor 4 and vibrates, it vibrates using the damper 5 as a fulcrum. 2, it vibrates together with the separation rotor 2 with the damper 5 as the fulcrum. Therefore, the gap δ1.
There is no problem even if δ2 is made small.This allows the gap δ1.
It is possible to prevent sample leakage from δ2.

In this way, the centrifugal separator of this embodiment is configured so that the separating rotor, which is the rotating part of the continuous rotor, and the inlet and collector, which are the non-rotating parts, can swing together, so that the gap between the separating rotor and the collector can be reduced. The gap between the injection port and the separation rotor can be made narrower than before, and the gap between the injection port and the separation rotor can be made narrower than before, so even if the amount of sample to be injected is increased, it can be made smaller than before. Can prevent leakage.

As described above, the centrifugal separator of the present invention prevents the supernatant liquid of the sample after centrifugation from leaking through the gap between the separation rotor and the collector, and increases the flow rate of the sample injected through the injection port. This has the effect of preventing leakage from the opening at the center of the upper surface of the separation rotor.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a conventional centrifuge, and FIG. 2 is a longitudinal sectional view of an embodiment of the centrifugal separator of the present invention. 1... Inlet, 2... Mountain/separation rotor, 3... Collector, 4... Motor, 5... Damper, 7... Base. - space, 8... cylindrical protrusion, 9.14... opening, 10...
Discharge port, 11...No1 using, 13...
...Lower base, δ1. δ2... Gap. Fang 1 diagram

Claims (1)

[Claims] 1. A vertical shaft motor supported on a base via a damper, a separation rotor fixed to the upper end of the shaft of the motor, and a cylindrical protrusion opening at the center of the upper surface of the separation rotor supported in a non-rotating position. The inlet is fitted with a gap around the periphery and installed with the opening facing downward, and the opening at the bottom of the cylindrical protrusion is fitted with a gap around the outer periphery of the cylindrical protrusion, which is supported in a non-rotating position. and a collector configured to collect the sample separated through the separation rotor through an outlet provided in the cylindrical protrusion, wherein the collector and the inlet are connected to the housing of the motor. A centrifugal separator characterized by being supported.