JPS6023008Y2 - Chip deoiling device using centrifugal separation - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a device that uses centrifugal force to remove oil from oily chips discharged from a machine tool or the like.

Centrifugal oil removal equipment has a bowl-shaped basket with an oil passage hole in its side wall, rotates it at high speed, and then drops oily chips onto the bottom of the basket. After the chips rise up to the vicinity of the passage hole in the side wall and stay there for a certain period of time, they are pushed up by later chips that successively ascend along the bottom surface and fly out of the basket.

The oil is separated while remaining near the passage hole in the side wall.

However, if elongated chips or fine chips are entangled, the centrifugal force will not cause them to rise along the side wall, but will be pushed up by the next rising chips, causing them to accumulate in the scrape. There was a problem that the deoiling process of the chips did not proceed continuously from the time of dropping to the time of discharge, resulting in a decrease in processing capacity.

In order to solve this problem, it may be possible to increase the slope of the side wall of the basket, but this would increase the relative centrifugal force, shorten the residence time of chips in the basket, and prevent deoiling. It will fly out of the basket.

The purpose of this invention is to propose the above-mentioned oil removal device that allows the chips to remain in the basket for a certain period of time regardless of the shape or amount of chips, and discharges the chips outside the basket after oil removal is completed. .

In other words, this invention provides a compressed air injection device that blows air from the center of the screw conveyor that feeds the chips into the basket, through the inside of the screw shaft, and from the end of the shaft to the bottom of the basket. The main idea is to compensate for this by using the wind pressure of this air.

Next, this invention will be explained in detail based on drawings of embodiments.

FIG. 1 is a longitudinal sectional view of a deoiling device according to this invention.

A basket 1 to be rotated at high speed is bowl-shaped and has a large number of small-diameter oil holes 2 drilled in its vertical side wall to allow only oil to pass through.
The rotational force from the electric motor 4 is transmitted to the belt pulley provided at the bottom of the bearing 3, and the belt rotates at high speed.

Chips flying out from the upper end of the basket 1 rotating at high speed are collected in a box-shaped chip receiver 5 with an open top that surrounds the basket 1, and are dropped into a storage box (not shown) from a discharge port 6 connected to the chip receiver 5. Ru.

In addition, the oil scattered from the oil hole 2 is removed from the oil receiver 7, which consists of an oil receiver plate provided around the bottom of the basket 1 and the back surface of the chip receiver 5.
The oil is collected by the oil tank, and is configured to open at the bottom of the oil pan 7 and flow into an oil tank (not shown) through a discharge port 6.

A screw conveyor is used as a device for introducing oily chips into the basket 1.

That is, a funnel-shaped hopper 9 is installed above the basket 1, a screw shaft 10 is inserted into the cylindrical portion of the hopper 9, and the screw shaft 10 is mounted on a bearing 11 supported by a frame.
It is configured such that power is transmitted from an electric motor 13 to a belt pulley 12 fixedly installed at the upper end via a V-belt.
The chips put into the hopper 9 are sent out in fixed amounts.

Next, a device for feeding compressed air into the basket 1 will be described. In this invention, the hollow portion 20 of the screw shaft 10 is used as a feeding pipe.

That is, the screw shaft 10 is a tube with screw blades fixed to the outer periphery, and the nozzle 21 is located at the lower end of the shaft, and the injection port is inclined with respect to the bottom surface of the basket 1.

At the upper end of the screw shaft 10, there is a rotary joint 2.
2 is connected to the rotary joint 22, and a feed pipe 23 connected to a compressed air pump (not shown) is connected to the rotary joint 22.

From the compressed air pump, the feed pipe 23, joint 22,
The compressed air that passes through the screw shaft hollow part 20 and is ejected from the nozzle 21 to the bottom surface of the basket 1 hits the bottom surface of the basket together with the chips sent out by the screw conveyor.
Furthermore, the chips receive the centrifugal force caused by the high-speed rotation of the basket 1 on the inclined bottom surface along with the pressure of the compressed air, slide the bottom surface toward the side wall of the basket 1, rise, and are sequentially sent out, sliding the bottom of the basket 1 toward the side wall. (It is pushed up one after another by other chips, and finally jumps out from the top of basket 1.)

Therefore, the chips slide inside the basket 1 due to the centrifugal force and the wind pressure of the compressed air, gradually rise up the side wall where there are many oil holes 2, stay there for a certain period of time, and then are removed from the basket 1.
jumps out and falls into the chip receiver 5.

If the chips are uniformly small, there will be enough force to push the chips up on the side wall of the basket even without supplying compressed air. If the chips cannot rise with the chisel, adjust the amount of compressed air supplied to compensate for the insufficient chip push-up blade, and control the chips so that they stay on the side wall for a certain period of time and then fly out of the basket. be able to.

In other words, according to this invention, regardless of the shape or amount of chips, by adjusting the amount of compressed air to be supplied, the chips are released outside the basket after the required amount of time for oil removal on the side wall is always secured. Therefore, the ability to remove oil from chips remains constant.

In addition, conventionally, if a certain amount of chips were not continuously introduced, the
Although the process of deoiling and discharging does not proceed continuously, with this device, even if the chip injection is stopped midway through, the chips remaining on the side wall during deoiling can be discharged using only compressed air. Similarly, even when the basket stops, remaining chips can be discharged.

Furthermore, this compressed air can also be used to clean the inside of the basket.

The case where the screw shaft of the screw conveyor is used as a compressed air nozzle has been described above, but a separate radial nozzle is provided at the center of the screw conveyor, for example, below the tip of the screw shaft, and a compressed air hose is connected to this from the outside. The same effect as the above-mentioned structure can be obtained even if compressed air is ejected from a nozzle and blown onto the bottom of the basket together with the chips sent out from the conveyor.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a chip deoiling device according to this invention. In the diagram, 1... Basket, 2... Oil hole,
3, 11... Bearing, 4, 13... Electric motor, 5... Chip receiver, 6... Discharge port, 7
...Oil pan, 8...Oil drain port, 9...
...Hopper, 10...Screw shaft, 12.
...Belt wheel, 20 ... Screw shaft hollow part, 21 ... Nozzle, 22 ... Rotary joint, 23 ... Feeding pipe .

Claims (1)

[Scope of utility model registration request] It is equipped with a bowl-shaped basket that rotates at high speed with many oil holes in the side wall, a screw conveyor that feeds chips into the bottom of the basket, and a nozzle that sprays compressed air from the center of the tip of the screw conveyor to the bottom of the basket. A device for removing oil from chips by centrifugal separation and a compressed air injection device.