JP-7856651-B2 - Cyclone-type foreign matter separation device

JP7856651B2JP 7856651 B2JP7856651 B2JP 7856651B2JP-7856651-B2

Inventors

蚊野敏之
仲谷武
右田憲司
山本洋彰

Assignees

日本スピンドル製造株式会社

Dates

Publication Date: 20260511
Application Date: 20220427
Priority Date: 20210712

Claims (3)

The cyclone unit and An upper case provided on the top of the cyclone body, A connecting pipe that connects the inside of the cyclone body and the inside of the upper case, A defoaming pipe inserted into the aforementioned connecting pipe, In a cyclone-type foreign matter separation device equipped with, The defoaming pipe is provided with a vortex-holding means for holding the vortex generated inside the defoaming pipe . The vortex retention means is composed of a slit for introducing a vortex that swirls along the outer circumference of the defoaming pipe into the interior of the defoaming pipe. The slit is formed along the vertical direction on a part of the outer circumference of the defoaming pipe, The aforementioned slit is provided with brackets that connect the slit in the width direction. A cyclone-type foreign matter separation device characterized by the following features.
The cyclone-type foreign matter separation device according to claim 1, characterized in that the defoaming pipe is composed of two semi-cylindrical pipes of different diameters, which are eccentric to each other, and the slit is formed between the free ends of the two semi-cylindrical pipes along the vertical direction.
The cyclone-type foreign matter separation device according to claim 1 or 2 , characterized in that a round pipe or round bar is arranged vertically along the central axis of the defoaming pipe.

Description

The present invention relates to a cyclone-type foreign matter separation device for separating foreign matter such as metal powder from a processing liquid such as a coolant by centrifugal force. For example, when machining metal materials using a machine tool, a water-soluble coolant is supplied to the cutting area for cooling, lubrication, and efficient removal of cutting chips. Therefore, foreign matter such as metal chips and abrasives can become mixed into the coolant. Since coolant is reused, any foreign matter mixed into the coolant must be removed before reuse. One known method for removing this foreign matter is a cyclone-type foreign matter separator. This cyclone-type foreign matter separator comprises a cyclone body with a foreign matter discharge port opening at its lower end, a processing liquid introduction pipe having an inlet opening tangentially into the cyclone body, an upper case provided on the upper part of the cyclone body, a processing liquid discharge pipe opening into the upper case, and a connecting pipe connecting the inside of the cyclone body and the inside of the upper case. In the cyclone-type foreign matter separation device described above, the cyclone body comprises a cylindrical section and a conical section that extends downward from the lower end of the cylindrical section while gradually decreasing in diameter. When coolant containing foreign matter is injected into the cylindrical section of the cyclone body from the inlet of the processing liquid introduction pipe, this coolant descends along the inner surface of the cyclone body as a swirling flow. This generates a vortex flow inside the cyclone body, and foreign matter with a higher specific gravity than the coolant is sprayed against the inner surface of the cyclone body by centrifugal force and separated from the coolant. This separated foreign matter descends along the inner surface of the cyclone body and is discharged from the foreign matter outlet for collection. The vortex flow descending along the inner surface of the cyclone body then turns upward near the foreign matter discharge port, generating a vortex flow above the axial center of the cyclone body, moving from the foreign matter discharge port towards the upper case. This rising vortex flow includes a columnar air layer extending from the foreign matter discharge port through the connecting pipe into the upper case, and a purified coolant layer rising along the circumferential surface of this air layer. The coolant constituting the purified coolant layer is guided into the upper case along with the rising vortex flow, and from this upper case it is discharged into the treated liquid discharge pipe for reuse. However, in the cyclone-type foreign matter separator described above, the outlet of the connecting pipe opens directly into the interior of the upper case, causing the air layer and the coolant layer to mix at the outlet of this connecting pipe. As a result, air is drawn into the coolant, causing the coolant to foam violently inside the upper case and generating a large amount of air bubbles. Therefore, Patent Document 1 proposes a cyclone-type foreign matter separation device as shown in Figure 11. Specifically, Figure 11 is a longitudinal cross-sectional view of a cyclone-type foreign matter separation device proposed in Patent Document 1. In the illustrated cyclone-type foreign matter separation device 101, a gas-liquid separation pipe (defoaming pipe) 107 into which a vortex flow enters is arranged coaxially with the axial center O of the cyclone body 102 in the clean chamber S within the clean case (upper case) 104. Furthermore, a first storage section 121 for temporarily storing coolant that has passed through the gas-liquid separation pipe 107 is provided at the bottom of the upper case 104, surrounding the gas-liquid separation pipe 107, and a second storage section 122 for temporarily storing coolant flowing in from the first storage section 121 is also provided. With the cyclone-type foreign matter separator 101 configured as described above, the coolant, purified by the separation of foreign matter within the cyclone body 102, flows from the connecting pipe 106 into the gas-liquid separator pipe 107. However, since the coolant rises along the periphery of the columnar air layer, only this coolant passes through the small holes 107a of the gas-liquid separator pipe 107 and flows into the first storage section 121. Therefore, only the coolant that has flowed into the gas-liquid separator pipe 107 can be extracted individually, and since air is prevented from being entrained into this coolant, foaming of the coolant is prevented. Japanese Patent Publication No. 2005-007212 This is a longitudinal cross-sectional view of a cyclone-type foreign matter separation device according to Embodiment 1 of the present invention.This is a longitudinal cross-sectional view of the main part of a cyclone-type foreign matter separation device according