JPH0149549B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application] The present invention relates to a centrifugal separator, and particularly to a support device for the bucket, and by supporting the lower end of the support device at one point, when the bucket is rotated. In this case, the time required to reach an equilibrium state can be shortened.

[Prior art and its problems] In a centrifugal separator, in order to absorb the unbalance of the contents contained in the bucket, the support device that supports the bucket is equipped with a mechanism shown in Fig. 4 to allow oscillating motion. An elastic support device as shown in Fig. 1 is employed.

As shown in the figure, in the conventional support device of this type, a support base 2 that rotatably supports a bucket 1 and has an electric motor 21 attached thereto as a driving means is attached to the bottom of a body 3 via springs 4, 4. Or,
A configuration in which support is provided by other elastic support means is adopted.

In this conventional device, even if the contents stored in the bucket 1 are unbalanced, the springs 4 absorb this unbalance, and the contents are fixed to the support base 2 at the beginning of the rotation of the bucket 1. When it reaches a high-speed rotation state without applying any unreasonable force, it reaches a substantially equilibrium state and continues to rotate.

However, this conventional system has a problem in that it takes a long time from the beginning of the rotation of the bucket 1 until it reaches an equilibrium state.

This is because the fulcrum of the oscillating rotation that occurs at the beginning of rotation is not constant, and as the rotation speed increases, the fulcrum of the oscillating rotation gradually concentrates on one point. This is because a certain amount of time is required until the fulcrum of swing rotation is fixed at one point.

[Technical Problem] The present invention is directed to a centrifugal system in which a bucket 1 is rotatably supported by a support 2 and this support 2 is elastically supported to allow swinging motion. In order to shorten the time required from the initial stage of rotation to the equilibrium state in the 'separator', the technical challenge is to ensure that the fulcrum of the oscillating rotation is fixed at a constant level at the initial stage of rotation. Take it as a challenge.

[Technical Means] The technical means of the present invention taken to solve the above-mentioned technical problem is ``The support base 2 is provided with a shaft portion 22 coaxial with the rotation center of the bucket, and the lower end of this shaft portion 22 is It was supported in a spherical pair by a fixed part. (See Figure 1) [Operation] The above technical means of the present invention operates as follows.

The bucket bag 1 is supported by a support base 2, which is elastically supported between a fixed part and supported in a spherical pair by a shaft part 22 provided on the support base 2. be done.

Therefore, the bucket bag 1 is rotatable with respect to the support base 2, and can also swing around the lower end of the shaft portion 22. When the bucket 1 is filled with contents and rotated, the bucket 1 makes a grinding motion in response to the unbalance of the contents at the beginning of the rotation of the bucket 1. Here, the center of the grinding motion is the shaft portion 2
Since it is a spherical pair of the lower end of 2 and the fixed part,
fixed at one point.

Generally speaking, the higher the rotation speed of a rotating body, the greater the force required to maintain its axis of rotation in a constant posture.However, since the axis of rotation of bucket 1 always passes through the fixed point, As the rotation speed increases, the axis of rotation of the bucket 1 is shifted to coincide with a vertical line passing through the fixed point.

[Effects] Since the present invention has the above configuration, it has the following unique effects.

The axis of rotation of the bucket 1 always passes through the fixed point, and as the rotation of the bucket 1 increases, the axis of rotation of the bucket 1 shifts to coincide with the vertical line passing through the fixed point. Compared to the previously mentioned conventional type which does not pass through a fixed point, the time required for the bucket 1 to reach an equilibrium state is shorter. Therefore, less noise is generated until the equilibrium state is reached.

[Example] Hereinafter, an example of the present invention will be described based on FIGS. 2 and 3.

The embodiment shown in the figure is a deoiling machine for removing oil from small parts. It is housed in an upper case 31 that is integrated with 2. The support stand 2 includes a frame portion 23 to which the electric motor 21 is attached, and a bearing portion 24 that rotatably supports the rotating shaft 11 of the bucket 1.
The center portion of the bottom of the upper case 31, which is previously formed into a cylindrical shape with a bottom, is fixed to the peripheral portion of the bearing portion 24.

The support stand 2 protrudes downward from an opening formed at the top of the lower case 32, has a plurality of arms 25, 25 extending downward from the lower edge of the frame 23, and is a plate constructed between the lower ends of these arms 25, 25. The shaft portion 22 projects downward from the center of the frame 26.

The fixing structure of the lower end of the shaft portion 22 is a spherical pair as shown in FIG. It is fitted into the concave portion 33.

Furthermore, in this embodiment, on the outer periphery of the shaft portion 22,
A coil spring 41 is installed between the plate frame 26 and the bottom of the lower case 32 so as to be coaxial with the plate frame 26.
A rubber cylinder 42 is interposed therebetween, and a coil spring 41 is positioned on the outer periphery of the rubber cylinder 42. Furthermore, a concave groove 43 that opens toward the outer circumferential side is carved and wound in the middle of the outer circumferential surface of the rubber tube 42 .

The combination of the coil spring 41 and the rubber tube 42 provides a biasing force for maintaining the bucket bag 1 in an upright position, similar to the springs 4 and 4 of the previously described conventional examples. Since the groove 43 is provided on the outer periphery, the elastic return force is weak (the elastic modulus is small) until the groove 43 is crushed so that it disappears. In the state in which the opposing side walls of the groove 43 are in contact with each other), the elastic return force is strong (the elastic modulus is large). Therefore, when the degree of swing of the bucket 1 exceeds a certain limit, the elastic modulus increases rapidly, so even if the eccentricity of the contents in the bucket 1 increases, the bucket 1 does not tilt excessively. Also, by using only this rubber tube 42, the bucket 1
When applying force to maintain an upright posture, use the rubber tube 4.
Since the material of 2 is rubber, there is a problem in terms of durability, and if used for a long period of time, the rubber tube 42 will be permanently deformed. Since the coil spring 41 is provided on the outer periphery of the rubber cylinder 42, the permanent deformation of the rubber cylinder 42 described above can be prevented.

Further, in the above embodiment, as shown in FIG. 2, an inner cover 35 is provided which is rotatably supported relative to the outer cover 34 attached to the upper case 31, and the outer cover 34 is closed. In this state, the inner lid 35 is tightly fitted into the opening at the upper end of the bucket 1.

Therefore, when the outer lid 34 and the inner lid 35 are opened, the machined parts are stored in the bucket 1, and these lids are closed, the electric motor 21 is operated to rotate the bucket 1, and the above-mentioned action is performed. The rotation of the bucket 1 reaches an equilibrium state, and the oily components of the parts housed in the bucket 1 rise up the tapered inner circumferential surface of the bucket 1 and pass through a large number of through holes 12 formed at the upper end thereof. , 12 to the outside, and then to the outside from a drain pipe 36 provided at the bottom of the upper case 31. In addition, in the case of this embodiment, it is also possible to accommodate a separate container within the bucket 1.

Although the above embodiments relate to deoiling machines, the present invention also applies to other types of centrifuges, e.g.
Needless to say, it can also be used in dehydrators, etc.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing the principle of the present invention, Fig. 2 is a sectional view of an embodiment of the invention, Fig. 3 is a detailed sectional view of the main part thereof, and Fig. 4 is an explanatory diagram of a conventional example. In the figure, 1...Bucket, 2...Support stand, 22...Shaft part.

Claims (1)

[Claims] 1 In a type of centrifugal separator in which a bucket 1 is rotatably supported by a support 2 and this support 2 is elastically supported to allow swinging motion, an axis coaxial with the center of rotation of the bucket 1 is used. Part 22
A centrifugal separator is provided with a support base 2, and the lower end of the shaft part 22 is supported by a fixed part in a spherical pair.