JPH03181347A - Revolving body of centrifugal separator - Google Patents

Abstract

PURPOSE:To surely and automatically control the life of the revolving body of centrifugal separator by constituting the revolving body by providing the data holding unit capable of reading and storing the data of the number of operation and the integrated operational time of the revolving body. CONSTITUTION:In the revolving body 2 of centrifugal separator which is freely exchangeable and separates a sample 1 having different densities using centrifugal force, the revolving body 2 is constituted by providing the data holding unit 3 capable of reading and storing the data of number of operation and the integrated operational time of the revolving body 2. As a result, the control of the life of revolving body is surely and automatically carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rotating body for a centrifugal separation machine.

[Conventional technology]

The rotating bodies used in centrifuges called ultracentrifuges operate at ultra-high speeds, for example 83,000 mi, in order to obtain high centrifugal acceleration.
Since it is necessary to rotate at n-'', the centrifugal stress acting on the rotating body is designed to exceed the fatigue limit of the material, such as Ti alloy or extra-super duralumin, and has a finite life.

Therefore, 1. Normally, a rotating body has a specified lifespan (for example, 5,000 times or 10,000 hours) based on the number of times it has been used and the cumulative amount of time it has been used, and a rotating body that has reached the end of its lifespan must be discontinued and disposed of at that point. It has become.

[Problem to be solved by the invention]

Conventionally, in order to manage the number of times the rotating body was used and the cumulative time, the user had to write it down in a notebook, etc., each time.
In addition to being a heavy burden on the user, there was also the risk of omissions in information. Also, US Pat, No. 4,772,
254Sep, 20, 1988,
By embedding multiple permanent magnets in the rotating body and identifying the rotating body by polarity, it is possible to record and manage the usage status in the memory provided inside the centrifuge body. Cannot be used in separators. Another disadvantage is that if the battery used to back up this memory becomes over-discharged, the recorded information will disappear.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a rotating body for a centrifuge that enables reliable and automated life management.

[Means for Solving the Problems] The above object is achieved by forming the rotating body with a data holding device that can read and write data on the number of times the rotating body has been operated and the cumulative operating time.

[Effect]

Since the above means is provided, the rotating body itself can record the number of times it has been used, the cumulative rotation time, etc., and there is no need to worry about the recorded contents being erased due to over-discharge of the battery, as was the case in the past.

〔Example〕

The present invention will be explained below based on the illustrated embodiments. An embodiment of the present invention is shown in FIGS. 1-4.

A rotating body 2 for a centrifuge that uses centrifugal force to separate samples l with different densities.
A data holding device 3 capable of reading and writing data on the number of operations and cumulative operating time is provided. By doing this, the rotating body itself can record the number of times it has been used, the cumulative rotation time, etc., which eliminates the need to reduce the recorded content due to over-discharge of the battery as in the past, and ensures reliable and automated life management. It is possible to obtain a rotating body 2 for a centrifuge that enables the following.

That is, the tube 4 in which the sample 1 to be separated is sealed is inserted into the rotating body 2, and the rotating body 2 is placed on the hub 5 and rotated at high speed by the opening device 6. A rotating chamber 7 in which the rotating body 2 rotates is depressurized during rotation to reduce windage loss, and is vacuum-sealed by a bellows 8. In addition, the temperature of the rotating body 2 is measured by a heat-sensitive ring 9, and is cooled by an evaporator 10 to maintain a constant temperature (see Figure 1).
A data holding device 3 is provided at the bottom of the rotating body 2, and a magnetic head 12 is mounted on a base 11 in the rotating chamber 7.
(see Figures 1 and 2). As shown in FIG. 3, the data holding device 3 has a structure in which a magnetic thin film 14 is deposited on the outer surface of a cylindrical sleeve 13, and the surface is protected with a coating material 15. In addition, in FIG. 2, 16 is a shaft.

By doing this, as shown in FIG. 4, when the rotating body 2 starts rotating, the magnetic head 12 reads data such as the number of operations and operation time recorded in the data storage device 3. The zero-rotating body 2 rotates at high speed and decelerates after the separation of the sample is completed.

When the rotation speed becomes low, the arithmetic unit 19 adds the current operation details to the data read at the start of rotation, and the magnetic head 12 writes the data into the data holding device 3. This allows the rotating body 2 itself to always have the latest usage data.

In this way, according to this embodiment, it is possible to record the number of times of use, cumulative rotation time, etc. on the centrifuge itself, so even if one rotating body is used in multiple centrifuges, it can be accurately recorded. The usage status can be recorded, and there is no need to worry about the recorded contents being erased due to over-discharge of the battery, and reliable life management can be performed automatically.

FIG. 5 shows another embodiment of the invention.

In this embodiment, the data holding device 3a includes a disk 20 provided at a predetermined position on a rotating body 2, a magnetic thin film 14 deposited on the surface of the disk 20, and a coating material 15 applied on the magnetic film 14. It was formed with. By doing so, the number of times of use, cumulative rotation time, etc. can be recorded in the data holding bag W3a, and the same effects as in the case described above can be achieved.

That is, the same effect can be obtained even if the data holding device 3a is not cylindrical as described above. The data holding bag [3a of this embodiment has a magnetic thin film 14 deposited on the surface of the disk 20, and the surface is protected with a coating material 15.

Further, the data holding device does not have to be located on the bottom surface of the rotating body, but may be provided at any part of the rotating body as long as it can be read and written by the magnetic head.

〔Effect of the invention〕

As described above, the present invention makes it possible to reliably and automatically manage the lifespan of a rotating body for centrifugal separation, and to obtain a rotary body for centrifugal separation that enables reliable and automated lifespan management. can.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional side view of one embodiment of the rotating body for centrifugal separation of the present invention, FIG. 2 is a cross-sectional view taken along line A-A in FIG.
The figure is an enlarged view of the main part of Fig. 1, Fig. 4 is a block diagram according to one embodiment, and Fig. 5 is a vertical sectional side view of the main part of the rotor of another embodiment of the centrifugal separation rotor of the present invention. It is. 1 is a sample, 2 is a rotating body for centrifugation, 3.3a is a data holding device, 5 is a hub, 11 is a base, 12 is a magnetic head, 13 is a sleeve, 14 is a magnetic thin film, 15 is a coating material, 20 is disk.

Claims (1)

[Claims] 1. A replaceable rotating body for a centrifuge that separates samples with different densities by using centrifugal force, wherein the rotating body comprises:
A rotating body for a centrifuge, characterized in that a data holding device is provided that can read and write data on the number of times the rotating body has been operated and the cumulative operating time. 2. The rotating body for a centrifuge according to claim 1, wherein the data holding device is arranged to face a magnetic head provided on a base that supports the rotating body via a hub. 3. The data holding device is formed of a cylindrical sleeve provided at a predetermined position of the rotating body, a magnetic thin film deposited on the outer surface of the sleeve, and a coating material applied on the magnetic thin film. A rotating body for a centrifuge according to claim 1, which is a rotating body for a centrifuge according to claim 1. 4. The data holding device is formed of a disk provided at a predetermined position of the rotating body, a magnetic thin film deposited on the surface of the disk, and a coating material applied on the magnetic thin film. A rotating body for a centrifuge according to claim 1.