JPS5931320Y2 - Bucket mounting part for centrifuge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a known centrifugal separator used for separating liquids containing a plurality of components having different specific gravities, and particularly to a mounting portion of a packet thereof.

First, the configuration of a centrifugal separator implementing this invention will be explained based on FIGS. 1 to 3.

In FIGS. 1 and 2, a rotor 1 is horizontally fixed to the upper end of a vertical rotating shaft 2. As shown in FIG.

The rotor 1 has a plurality of arms protruding from its outer periphery at equal intervals to form packet receiving sections 3 between them, and pins 4 are fixed to both sides of each receiving section 3, respectively.

Reference numeral 5 denotes a packet, the upper end of which is open, and pin receiving portions 6 that engage with the pins 4 are formed on both sides of the upper portion.

The pin receiving portions 6 are formed below the projecting portions 7 on both sides of the upper portion of the packet 5, and are semicircular recesses along the outer periphery of the pin 4 as shown in FIG.

The centrifugal separator that implements this invention has the above-mentioned configuration, and to explain how to use it, first, while the rotor 1 is stopped, put packets 5 into each packet receiver 3, and insert the pin receivers 6 into each pin. 4 and put the liquid to be separated into each packet 5.

Next, start the rotating shaft 2, gradually increase the rotation, and rotate the rotor 1.
When rotated at high speed, each packet 5 becomes horizontal with the pin 4 as the center as shown by the chain line in Figure 1, and the liquid flows into the packet 5.
is pressed against the bottom of the container and centrifugal force causes components with higher specific gravity to be separated at the bottom.

After sufficient separation has been achieved in this manner, when the rotor 1 smoothly slows down and stops, each packet 5 rotates downward around the pin 4 and becomes vertical.

In the above action, complete centrifugation cannot be achieved unless the packets move smoothly when they change from vertical to horizontal after starting and when they return from horizontal to vertical when stopped.

However, the shapes of the outer circumferential surface of the conventional pin 4 and the inner circumferential surface of the pin receiving part 6 are either a straight cylindrical surface as shown in FIG. 2 or 5a, or a conical surface as shown in FIG. It has become.

However, in terms of actual machining accuracy, it is extremely difficult to finish the contact surface between the outer peripheral surface of the pin 4 and the inner peripheral surface of the pin receiver 6 into a completely parallel surface as shown in Figures 5a and 6a. can be,
This is exaggerated as shown in s, c, d, e in Figure 5 and s, c in Figure 6.

Therefore, as is clear from the above figures, the pin 4 and the receiving part 6 are likely to make a strong contact on either the outer end or the inner end on one side and hardly contact on the other side, which is called uneven contact. When such uneven contact occurs, strong stress acts on the uneven contact surface due to the large centrifugal force load that acts on the packet 5 during operation, destroying the uneven contact surface, preventing the packet 5 from moving smoothly. This causes an inconvenience in that the liquid in the packet 5 is agitated and complete separation cannot be performed.

In order to solve the above-mentioned problem, this invention consists of the outer peripheral surface of either or both of the pin 4 of the rotor 1 and the pin receiving part 6 of the packet 5 by a curved part of a circular arc or a plurality of straight lines approximating this. The present invention provides a packet attachment part that can prevent uneven contact between a pin and a pin receiving part by having a rotating surface formed of a polygonal line, and can obtain smooth movement of the packet.

Each embodiment of this invention will be described in detail below with reference to FIGS. 7 and 8 of the accompanying drawings.

FIG. 7 shows a case where either the pin 4 or the pin receiving part 6 is a straight cylindrical surface or a part of a cylindrical surface.
In FIG. 7, a indicates that the outer periphery of the pin 4 is an axially arcuate surface, and b indicates that the pin receiving portion 6 is an axially arcuate surface.

In addition, in Fig. 7, C indicates that the outer circumference of the pin 4 is formed by a polygonal line made up of three straight lines, forming a rotating surface with a shape similar to a circular arc surface, and d indicates that the receiving portion 6 similarly forms a polygonal surface made of three straight lines. It is a rotating surface due to

Further, e and f in FIG. 7 indicate that the outer periphery of the pin 4 and the receiving portion 6 are each formed into a shallow chevron-shaped rotating surface approximated to a circular arc surface by two straight lines.

In addition, the combination of the pin 4 in a and the receiving part 6 in b in Fig. 7, C
There are combinations of the pin 4 of 1 and the receiving part 6 of d, the combination of the pin 4 of e and the receiving part 6 of f, etc.

Further, Fig. 8 shows each embodiment in the case of a tapered pin 4 and a tapered receiving part 6, and a shows a case where the pin 4 has a tapered shape consisting of an arcuate surface, and the receiving part 6 has a linear tapered surface. In the case of b, the pin 4 is a linearly tapered surface, and the receiving portion 6 is a circularly tapered surface.

Further, C in FIG. 8 is a tapered surface of the pin 4 which is a rotating surface of a polygonal line that approximates an arc formed by three straight lines, and the receiving portion 6 is a linear tapered surface, and d is the opposite of C.

Furthermore, e is a combination of a pin 4 consisting of a tapered rotating surface shaped like a shallow chevron-shaped arc formed by two straight lines, and a pin receiving part 6 consisting of a linear tapered surface, and f in FIG. The opposite is the case.

In addition, there are combinations of the pin 4 shown in FIG.

This invention has the above-described structure, and as is clear from the embodiments shown in FIGS. 7 and 8, immediately after manufacture, the pin 4 and the pin receiving portion 6 are in contact at their central portions.

As the number of times this contact increases and the contact portion between the pin 4 and the pin receiving portion 6 wears out, the contact surface gradually expands from side to side and eventually reaches full contact.

Therefore, unlike the conventional pin and pin receiving portion, uneven contact does not occur, and there is no risk of the packet getting caught during rotation due to abnormal wear.

In addition, in the case of this device, since the packet is supported at the center of the rotor pin or the pin receiving part of the packet, the left and right sides of the packet are evenly supported, compared to when the packet hits only one of the contact surfaces. There is no risk of the packet tilting, and the center of rotation of the packet is always horizontal, so a stable operating condition can be maintained.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a known centrifugal separator implementing this invention, Fig. 2 is a vertical sectional front view taken along line A-A in Fig. 1, Fig. 3 is a side view of only the same packet, and Fig. 4 is 5 and 6 are enlarged longitudinal side views showing various states of the known packet attachment portion. FIGS. 1 and 8 are enlarged longitudinal side views of the packet attachment portion of the present invention. It is a vertical side view showing the side. 1...Rotor, 4...Pin, 5...
...Packet, 6...Pin receiver.

Claims (1)

[Claims for Utility Model Registration] 1. The liquid in the packet is centrifuged by engaging pins on both sides of the packet receiver provided on a horizontal rotor rotating at high speed with arc-shaped pin receivers on both sides of the packet. In a centrifugal separator configured to do so, the axial shape of one or both of the contact surfaces between the rotor pin and the packet pin receiver is configured with a curve that is part of a circular arc or a polygonal line consisting of multiple straight lines that approximates this. A packet receiver for centrifugal separation in which the pin and the pin receiver are in contact with each other at the center as a rotating surface. 2 Utility Model Registration Scope of claim 1 In the centrifugal one-machine packet mounting part, one of the pins or the pin receiver has a straight cylindrical surface, and the other part has a curved surface that contacts the middle of the cylindrical surface. Or, to approximate this, a surface of revolution composed of polygonal lines made up of multiple straight lines. 3 Utility Model Registration In the centrifugal separation packet attachment part as set forth in claim 1, either the pin or the pin receiving part is a tapered surface, and the other is a curve that contacts the middle of the tapered surface, or a curve that approximates this. The rotating surface is composed of a polygonal line made up of a plurality of straight lines, and is inclined with respect to the rotation center line along the tapered surface.