JP2886190B2 - Oil purifier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an oil purifying apparatus that can be used for purifying lubricating oil for a diesel engine, for example.

<Prior Art> FIG. 3 shows a configuration diagram of a conventional oil cleaning apparatus. 1 is a centrifugal separator, 2 is an oil tank, 3 is a transport pump, and 4 is a filter. The used oil is introduced into the centrifuge 1 from the oil inlet, and coarse contaminants are removed from the oil by centrifugal force.
The centrifuged oil is temporarily stored in an oil tank 2 and further pumped up by a transport pump 3 and sent to a filter 4, where residual fine contaminants are filtered.

<Problems to be Solved by the Invention> However, in the above-described conventional apparatus, the oil that has passed through the centrifugal separator is temporarily stored in the oil tank 2 and is sent to the filter 4 by the transport pump 3 provided separately. Because
The transport pump 3 and a motor for driving the transport pump 3 are required, and there is a disadvantage that running costs and the like are increased. There is also a drawback that the oil tank 2 must be provided separately.

Accordingly, an object of the present invention is to provide an oil purifying apparatus which can solve the above-mentioned drawbacks of the conventional apparatus, can save energy and space, and can have a simple configuration by using fewer members.

<Means for Solving the Problems> In order to achieve the above object, the oil cleaning device of the present invention removes crude contaminants in oil from untreated oil supplied into the centrifugal separation chamber 13 through the introduction pipe 20. Centrifuges 10 for centrifugation
An oil purifier having at least a filter 4 for filtering fine contaminants from the oil from which coarse contaminants have been removed, which are conveyed from the centrifuge 10 through the oil transport pipe 40, The centrifugal separator 10 includes a container-like centrifugal separation chamber 13 that is horizontally rotated around the rotation axis X, and has a partition wall 14d just above the centrifugal separation chamber 13 and the centrifugal separation chamber 13. The pump chamber 14 is partitioned, and the pump chamber 14 includes:
An opening 14b is provided at the center of the partition wall 14d so that only oil near the center axis X of the centrifugal separation chamber 13 flows into the pump chamber 14, and near the side wall of the space inside the pump chamber 14. By opening the suction port 41 of the oil transport pipe 40,
It is characterized in that the oil after the removal of the coarse contaminants is carried from the inside of the pump chamber 14 to the filter 4.

<Operation> According to the first feature of the present invention, the untreated oil supplied to the container-like centrifugal separation chamber 13 of the centrifuge 10 through the introduction pipe 20 is rotated by the rotation of the centrifuge chamber 13. The coarse contaminants are centrifuged in the peripheral direction in the centrifuge chamber 13. The oil near the center of the centrifugal separation chamber 13 from which the coarse contaminants have been removed flows into the pump chamber 14 through the opening 14b at the center of the partition wall 14d. Oil (oil mixed with coarse contaminants) other than near the center of the centrifugal separation chamber 13 cannot enter the pump chamber 14 partitioned by the partition wall 14d.

The oil flowing into the pump chamber 14 (oil from which coarse contaminants have been removed) is conveyed to the filter 4 through an oil transport pipe 40 from a suction port 41 arranged near a side wall of the space inside the pump chamber 14, Further, fine contaminants are removed.

By the above operation, a tank for temporarily storing oil after centrifugation is not required.

Further, the pump chamber 14 is rotated by using the rotational drive of the centrifuge 10.
Can be performed, so that no pump is required and the configuration of the apparatus is simplified.

In particular, by separating the centrifugal separation chamber 13 and the pump chamber 14 above it with the partition wall 14d, oil containing coarse contaminants in the centrifuge separation chamber 13 is prevented from entering the pump chamber 14. The oil from which the coarse contaminants have been removed is introduced into the pump chamber 14 only through the opening 14b at the center, and the oil from which the coarse contaminants have been removed is sent to the filter 4 again.
Surely send only oil from which crude contaminants have been sufficiently removed,
It can be used for filtration of fine contaminants.

<Embodiment> FIG. 1 is an overall configuration diagram of an embodiment of the present invention, and FIG. 2 is a sectional view of a main part. Untreated oil inlet tube for centrifuge 10
A centrifuge 10 is provided with a recovery pipe 30 for overflow oil and an oil feed pipe 40 to the filter 4.

The centrifugal separator 10 is provided in a case 12 with a centrifugal separation chamber 13 rotated by a rotary drive source 11 such as a motor, and a pump chamber 14 rotated together with the centrifugal separation chamber 13. The centrifugal separation chamber 13 is formed in a container-like case 13a, and the central axis of the container-like case 13a is the rotation axis X. And the rotation axis X which is also the center of this case 13a
The untreated oil introduction pipe 20 hangs down through the ceiling of the case 12 in such a manner that the oil discharge port 20a at the lower end thereof is positioned at the lower center in the separation chamber 13.

The pump chamber 14 is provided directly above the centrifugal separation chamber 13 so as to rotate together with the rotation axis X as the centrifuge chamber 13 rotates. Then, the bottom wall of the case 14a of the pump chamber 14 is
As the partition wall 14d, the pump chamber 14 is partitioned from the centrifugal separation chamber 13, and an opening 14b is provided at the center of the partition wall 14d through which the rotation axis X passes. We accept incoming oil. From this opening 14b, only the oil near the center of the centrifugal separation chamber 13 from which the coarse contaminants have been centrifugally removed flows into the pump chamber 14, and the oil containing the coarse contaminants is blocked by the partition wall 14d. hand,
The pump room 14 cannot enter.

An overflow opening 14c is provided in the ceiling of the pump room 14. This overflow opening 14c and opening 1
Through the center of 4b, the introduction tube 20 hangs down into the centrifugation chamber 13. Further, a suction port 41 on the base end side of the oil transport pipe 40 to the filter 4 is opened in the pump chamber 14. Suction port 41
Is opened to the side near the side wall in the pump chamber 14. That is, the pump chamber 14 is opened at a high pressure position.

A receiving groove 15 for overflow oil is provided in the case 12 of the centrifuge 10. Opening of ceiling of pump room 14
The oil overflowing from 14c is received in the receiving groove 15, and further flows into the recovery pipe 30.

Now, when the rotation drive source 11 is started to drive and the untreated oil is introduced through the introduction pipe 20, the centrifugal separation chamber 13 and the pump chamber 14 rotate, whereby the introduced oil reduces the centrifugal force. receive. This centrifugal force separates the crude contaminants from the oil in the centrifugation chamber 13. Then, the oil is continuously introduced into the centrifugal separation chamber 13, so that the liquid level increases, and the centrifugally separated oil sequentially enters the pump chamber 14 through the central opening 14b. The oil containing the coarse contaminants is located near the periphery in the centrifugal separation chamber 13 and is blocked by the partition wall 14d and cannot enter the pump chamber 14.

The oil that has entered the pump chamber 14 is also continuously subjected to a large centrifugal force, and generates a large pressure outward. Due to the high pressure, the oil in the pump chamber 14 from which the coarse contaminants have been removed is pushed out from the suction port 41 into the oil transport pipe 40 and carried to the filter 4. The oil conveyed to the filter 4 is filtered for fine contaminants that have not been centrifuged there. This cleans the oil.

If the rotation speed of the centrifugal separator 10 is constant, the oil pressure near the oil transport pipe absorption port 41 in the pump chamber 14 becomes almost constant, and a special pressure regulating valve for adjusting the transport pressure is required. do not do. When the amount of filtered oil decreases due to clogging of the filter 4, the liquid level in the pump chamber 14 increases, and oil eventually overflows from the pump chamber 14.
By providing the overflow flow sensor in the recovery pipe 30, the maintenance time of the filter 4 can be easily known.

<Effect> According to the oil purifier of the first aspect of the present invention, the centrifugal force generated by the centrifugal separator 10 is also used as a pump action to filter the oil after centrifugal separation. Therefore, it is not necessary to separately provide a pump for transportation to the filter 4 or a tank for temporarily storing oil for transportation, and cost reduction, energy saving, and space saving can be achieved.

In addition, since the pump chamber 14 is configured immediately above the centrifugal separation chamber 13, it is possible to realize the dual use of the centrifugal force for the pump action with a very simple configuration.

In particular, the pump chamber 14 and the centrifugal separation chamber 13 are separated from each other by a partition wall 14d to prevent oil containing coarse contaminants from entering the pump chamber 14, and an opening 14b provided in the center of the partition wall 14d. Only the oil in the centrifugal separation chamber 13 is allowed to enter the pump 14, so only the oil from the center of the centrifuge separation chamber 13 where the coarse contaminants have been sufficiently removed is introduced into the pump chamber 14 and filtered. Machine 4 can be supplied.

[Brief description of the drawings]

1 is an overall configuration diagram of an embodiment of the present invention, FIG. 2 is a cross-sectional view of a main part, and FIG. 3 is a configuration diagram of a conventional device. 4: Filtration machine 10: Centrifuge 11: Rotary drive source 13: Centrifugal separation chamber 14: Pump chamber 14b: Opening 14d: Partition wall 15: Receiving groove 20: Untreated oil introduction pipe 30: Overflow oil recovery pipe 40 : Oil transport pipe 41: Suction port X: Rotating axis

Claims (1)

(57) [Claims] 1. A centrifuge 10 for centrifuging crude contaminants in oil from an untreated oil supplied into a centrifugation chamber 13 through an introduction pipe 20, and oil transport from the centrifuge 10. An oil purifier having at least a filter 4 for filtering fine contaminants from the oil after coarse contaminants removed through the pipe 40, wherein the centrifugal separator 10 has a rotating shaft X Constitute a container-shaped centrifugal separation chamber 13 that is horizontally rotated around the center, and a pump chamber 14 separated from the centrifugal separation chamber 13 by a partition wall 14d immediately above the centrifugal separation chamber 13. The pump chamber 14 is provided with an opening 14b at the center of the partition wall 14d so that only oil near the center axis X of the centrifugal separation chamber 13 flows into the pump chamber 14. Room 14
The suction port 41 of the oil transport pipe 40 is opened near the side wall of the inner space, so that the oil after the removal of the coarse contaminants is carried from the pump chamber 14 to the filter 4. Oil purifying equipment.