JPS5857227B2 - centrifuge - Google Patents

Description

[Detailed description of the invention] The present invention relates to a centrifuge.

Conventionally, in a centrifugal separator, centrifugal force and electrostatic charge are applied to processing liquids such as fuel oil and lubricating oil to destroy emulsions and colloids of impurities such as solids and water. A centrifugal separator that improves the separation effect of heavy liquids including Since a moving contact member is used, there are problems such as troublesome maintenance of the sliding conductive parts since the rotary cylinder rotates at high speed.

The present invention was proposed in view of the above circumstances, and aims to provide a centrifugal separator that improves the separation effect of heavy liquids and facilitates maintenance. A plurality of annular positive electrode plates and negative electrode plates are fixedly fixed and protruded coaxially around the rotating shaft in the radial direction and alternately stacked at constant intervals in the axial direction, and an armature winding coaxially fixed to the rotating shaft; a stationary side field surrounding the armature winding with an appropriate gap; and a circuit for connecting the output to the positive electrode and the negative electrode.

One embodiment of the present invention will be explained with reference to the drawings. Fig. 1 is a longitudinal sectional view thereof, Fig. 2 is a perspective view of the electrode plate in Fig. 1, and Fig. 3 is a perspective view of the electrode plate in Fig. 1.
4 are plan views showing the positive electrode plate and negative electrode plate of FIG. 1, respectively.

In the above figure, 1 is a rotary cylinder that is coaxially fitted to the upper end of the vertical rotating shaft 9 and separates the stock liquid into heavy liquid and light liquid under centrifugal force and a strong electrostatic field, and 2 is a rotary cylinder. 1 is an annular rotating barrel lid that partially closes the upper end opening; 3 is a bag nand for fixing the rotating barrel lid 2 to the upper opening of the rotating barrel 1; 4 is an annular flow rate adjusting plate 5 that connects the rotating barrel lid 2; A cap nut 6 for fixing to the center opening of the rotary body cover 2 is provided coaxially inside the rotary body cover 2 with an appropriate gap, and forms a heavy liquid passage 14 opening upward between the rotary body cover 2 and the rotary body cover 2. The wooden panel 7 is coaxially fixed to the rotating body 1 and has a liquid passageway 11 for supplying the liquid solution into the rotating body 1 through a vertical center hole. When the guide cylinder 8 forming the light liquid passage 15 that opens upwardly in the guide cylinder 8 is provided protruding in the radial direction around the guide cylinder 7, the S
A plurality of annular positive electrode plates and negative electrode plates are stacked alternately with a constant gap 13 in the axial direction, each having the same shape, and a conductor 8' protruding in the diametrical direction from the inner periphery. It has a diametrically protruding insulator 8''.

10 is the upper part of the guide cylinder 7, 12 is a separation chamber formed in the rotary shell 1, 16 is a rotor fitted on the rotary shaft 9 below the rotary shell 1 and is made of armature windings, and 17 is an appropriate radial direction. A stator made of a field that surrounds the rotor 16 with a gap, contact members 18 and 19 each fixed to the bottom surface of the rotating body 1 via an insulator, 20 a conductor, and 21 and 22, respectively. A rectifying capacitor and a diode attached to the bottom surface of the rotary shell 1, 23 a conductor, 24 a plurality of bolts for fixing the bottom surface of the guide tube 7 to the bottom surface of the rotary shell 1 via an insulator, 25 a guide tube The positive electrode rod 25 is made up of two positive electrode rods that are implanted in symmetrical positions on the bottom surface of 7 and extend upward.
are in contact with conductors 8'8' which protrude in the diametrical direction from the inner periphery of the positive electrode plate 8 which is alternately laminated with the negative electrode plate 8,
The two negative electrode rods 26 are conductors 8'8' that protrude in the diametrical direction of the inner circumference of the negative electrode plates 8 alternately stacked between the positive electrode plates.
are in contact with each other.

27 is a ball bearing 28 in which an inner race is fitted to the rotating shaft 9.
It is a cylindrical body whose lower open end is fitted into the outer race on the stationary side, and has a stator 17 on the inner periphery of the upper opening.

Reference numeral 29 denotes a plurality of radial springs arranged at equal intervals around the outer circumference of the cylindrical body 27, and the springs 29 apply an elastic centering force to the cylindrical body 27.

In such a device, when the rotating shaft 9 is rotated at high speed,
The raw liquid such as fuel oil, lubricating oil, etc. is supplied from the upper end opening of the guide cylinder upper part 10 through the raw liquid passage 11 into the separation chamber 12, and is preseparated in the separation chamber 12 by the action of centrifugal force. The emulsion and colloid are destroyed by the action of a strong electrostatic field on the electrode plates 88 stacked vertically in the area, and the impurities grow agglomerated and further receive a centrifugal separation effect, moving toward the outer periphery, becoming a heavy liquid, and impurities. The removed liquid flows in the direction of the rotation axis and becomes light liquid and is discharged to the outside through the light liquid passage 15, and the heavy liquid is discharged to the outside through the heavy liquid passage 14.

Therefore, if there is a lot of water in the stock solution, most of it is pre-separated and the stock solution with less water content is subjected to the action of a strong electrostatic field, causing it to coagulate and move to the outer periphery, so that the voltage between the electrode plates is The destruction of emulsification and the agglomeration and growth of impurities are sufficiently carried out without deterioration of the content, and the three functions of preliminary centrifugation, electrostatic voltage application and centrifugation can be carried out simultaneously in the same rotating drum.

In addition, at this time, the armature winding that constitutes the rotor 16 generates a high voltage due to the high speed rotation of the rotating shaft 9, and this high voltage output is passed through the conductor 20, the contact member 18-19, and the conductor 20. It is rectified by a rectifier circuit consisting of a diode 22 and a capacitor 21, and is applied to the positive and negative electrode plates 88 via a conductor 23, a bolt 24, a positive electrode rod 25, and a negative electrode rod 26, and these members are all integrated with the rotating shaft 9. Since the current circuit does not include any mechanically sliding energizing members such as brushes and slip rings, problems such as wear and failure do not occur, and maintenance is extremely easy.

Furthermore, in this device, the rotating shaft 9 vibrates greatly when it exceeds the first critical speed, but since the stator 17 is elastically supported by the spring 29 via the cylindrical body 27, the rotating shaft 9 vibrates greatly. Despite the large amplitude vibrations of the rotor 16 caused by large vibrations, the stator 17 automatically follows the rotation of the rotor 16 and aligns itself, ensuring safe operation of the device. In addition, the gap between the two can be kept constant at all times to ensure stable output from the armature.

In short, according to the present invention, when fixed in the rotating barrel of a centrifugal separator and protruding coaxially around the rotating shaft in the radial direction, the buried plates S are stacked alternately at constant intervals in the axial direction. a plurality of positive electrode plates and negative electrode plates, an armature winding located below the rotating body and coaxially fixed to the rotating shaft, and surrounding the armature winding with an appropriate gap. Fixed side field magnet,
By including a circuit fixed to the rotating shaft side and connecting the output of the armature winding to the positive electrode and the negative electrode, a centrifugal separator with a high separation effect and easy maintenance can be obtained. Above all, it is extremely useful.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention, FIG. 2 is a perspective view showing the electrode plate of FIG. 1, and FIGS. 3 and 4 are the positive electrode plate and negative electrode of FIG. 1, respectively. It is a top view which shows a board. 1... Rotating barrel, 2... Rotating barrel lid, 34
...Bag nut, 5...Flow rate adjustment plate, 6
... Water tray, 7 ... Guide cylinder, 8 ...
... Electrode plate, 8' ... Conductor, 8" ...
... Insulator, 9 ... Rotating shaft, 10 ...
・Top of guide tube, 11...Standard solution passage, 12...
...Separation chamber, 13...Gap, 14...
・Heavy liquid passage, 15...Light liquid passage, 16...
...Rotor, 17...Stator, 18, 19...
...Contact member, 20...Conductor, 21...
... Capacitor, 22 ... Diode, 23
...Conductor, 24...Volt, 25...
...Positive electrode rod, 26...Negative electrode rod, 27.
... Cylindrical body, 28 ... Ball bearing, 29 ...
····Spring.

Claims (1)

[Claims] 1. A plurality of annular plate-shaped positive electrode plates that are fixed in the rotating body of a centrifuge and protrude coaxially around the rotating shaft in the radial direction, and are stacked alternately at constant intervals in the axial direction. and a negative electrode plate, an armature winding disposed below the rotary drum and coaxially fixed to the rotary shaft, a stationary side field surrounding the armature winding with an appropriate gap, and the above-mentioned 1. A centrifugal separator comprising: a rotating shaft fixed to a rotating shaft side and connecting an output of the armature winding to the positive electrode and the negative electrode.