KR101473303B1 - A cutting oil purification apparatus which unified structure of gear pump and impeller pump - Google Patents

Abstract

The present invention provides a cutting oil purifying apparatus in which a gear pump and an impeller pump are unified. The cutting oil purifying apparatus includes: a lower supporter (10) of which the lower part protrudes toward the inside of an oil storage tank (1) and has a cutting oil inlet (12) and of which the upper part is fixed and connected to the upper side of the oil storage tank (1) and has a chip outlet (16); an upper supporter (20) which is fixed and connected to the upper part of the lower supporter (10); a driving motor (30) which is fixed and connected to the upper side of the upper supporter (20) and has a driving shaft (36) extending to the inside of the lower supporter (10); a rotor (140) which is connected to the driving shaft (36) of the driving motor (30) and is mounted inside the lower supporter (10); an impeller (160) which is located inside the lower supporter (10) and opposed to the cutting oil inlet (12) of the lower supporter (10) and is mounted at the lower end of the rotor (140); and a gear pump which is connected to the driving shaft (36) of the driving motor (30) and is mounted at the upper supporter (20) to forcedly send the cutting oil which is inhaled by the impeller (160) and is separated from the chips by the centrifugal force transferred by the rotor (140).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cutting oil purification apparatus for a gear pump and an impeller pump,

The present invention relates to a cutting oil purifying apparatus, and more particularly, to a method and apparatus for purifying cutting oil discharged during a cutting process, in which a chip for reducing a pumping force of a gear pump is removed in advance, To an apparatus for purifying a coolant in which a gear pump and an impeller pump are integrated.

Normally, a cutting tool is supplied to a spindle, a tool, and a workpiece in order to increase the cutting effect and lubricate and cool the tool. Such a cutting oil is recovered and then purified and then reused. Since the recovered cutting oil is mixed and recovered with fine chips generated during the cutting process, it is necessary to separate the cutting oil and the chip using an appropriate purification device.

In this coolant purifier, a pump for sucking and circulating coolant, which is discharged in the cutting process and temporarily stored in the water tank, is mounted. An impeller pump is widely used as a circulation pump. On the other hand, in order to maintain the accuracy of the cutting process and extend the service life of the machine tool, it is necessary to supply a high-pressure cutting oil to forcibly discharge chips generated during the cutting process. The impeller pump is not suitable for obtaining such a high pressure.

A gear pump, such as a trochoid pump using a trochoid curve, is widely used as a means for supplying high-pressure cutting oil to a purifying device. A representative example of a coolant supply apparatus using a conventional gear pump is shown in Fig. This technology has been proposed in Korean Patent Laid-Open Publication No. 2013-0037938 and includes a suction pump 30 for sucking cutting oil from a storage tank 10 through a suction pipe 25 and supplying the suction oil to a filter 40, And a circulation pump 50 for supplying the cutting oil that has passed through the circulating pump 50 to the machine tool. In particular, the suction pump is an impeller and the circulation pump is a gear pump.

However, when the cutting oil purifying device is configured in such a manner, the suction pump and the circulating pump are separated and installed, which is disadvantageous in that the whole device becomes large and complicated. Furthermore, the main reason for using a gear pump as a circulation pump is to utilize the high-pressure pumping force in circulating the cutting oil. The suction pump is responsible for suction of the coolant in the reservoir, In the case of using only the cutting oil supplied only to the machine tool, there is a problem in that the installation cost of the whole apparatus increases due to the double installation of the pump.

Korean Patent Publication No. 2013-0037938

SUMMARY OF THE INVENTION It is an object of the present invention to provide a coolant purifier capable of making full use of the characteristics of an impeller pump and a gear pump as a compact device.

In order to achieve the above object, the lower part provided with the coolant inflow port (12) protrudes into the lower oil tank (1) and the upper part provided with the chip outlet (16) is fixed to the upper surface of the lower oil tank A lower support (10) to be joined; An upper support 20 fixedly coupled to the upper portion of the lower support 10; A drive motor (30) fixed to the upper surface of the upper support (20) and having a drive shaft (36) extending into the lower support (10); A plurality of through holes 146 through which the cleaned cutting oil is discharged are installed on the upper side of the lower support body 10 and are connected to the drive shaft 36 of the drive motor 30, A rotating body 140 provided with a rotating shaft 140; An impeller 160 positioned inside the lower support 10 facing the coolant inlet 12 of the lower support 10 and mounted at the lower end of the rotator 140; The centrifugal force is transmitted to the rotating body 140 by the centrifugal force after being sucked by the impeller 160 and then being connected to the driving shaft 36 of the driving motor 30, A gear pump unit for forcedly feeding the separated cutting oil; The present invention will be described with reference to the accompanying drawings.

The rotary blade 142 of the rotating body 140 may have a triangular cross section.

The lower support 10 may be provided with an annular chip membrane 150 and the rotator 140 may be located within the chip membrane 150.

The present invention has the advantage of greatly simplifying the apparatus itself by reducing the size of the apparatus itself by proposing a monolithic coolant purification apparatus in which a gear pump, a rotating body and an impeller are sequentially mounted on a drive shaft of the drive motor.

Further, the present invention is configured such that the gear pump is directly involved in the discharge of the coolant, thereby making it possible to effectively utilize the high-pressure characteristics of the gear pump unlike the prior art.

1 is a schematic overall configuration diagram of a coolant purifier according to the present invention;
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cutting oil purifying apparatus.
3 is a schematic view of a rotating body in a cutting oil purifying apparatus according to the present invention.
4 is a block diagram of a coolant purifier using a conventional gear pump.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the technical features of the present invention, A detailed description thereof will be omitted.

Fig. 1 is a schematic overall configuration diagram of a cutting oil purifying apparatus according to the present invention. As shown in the drawings, the present invention includes a lower support 10 and an upper support 20, a drive motor 30, And an impeller 160, and a gear pump unit.

The lower support 10 is a part for supporting each component of the present invention. The lower part is protruded into the lower oil tank 1 and the upper part is fixedly coupled to the upper surface of the lower oil tank 1. A chip discharge port 16 for discharging chips filtered by the cutting oil is provided on one side of the upper portion exposed to the outside of the lower oil tank 1, A coolant inflow port 12 through which the coolant temporarily stored in the storage tank 1 flows is provided. The coolant inlet port 12 and the chip outlet port 16 are in communication with each other.

The upper support 20 is fixedly coupled to the upper portion of the lower support 10 as a portion where the drive motor 30 and the gear pump are mounted. Unlike the lower support 10, the upper support 20 may not have a closed structure.

The drive motor 30 is fixedly coupled to the upper surface of the upper support 20 as a part for providing a driving force to the coolant purifier according to the present invention. The drive shaft (36) of the drive motor (30) extends to one side of the interior of the lower support (10). The drive motor may be a conventional motor. Reference numeral 34 denotes a coupling.

The rotating body 140 is a part temporarily storing in the storage tank 1 and then providing a rotational force to the suctioned coolant. The rotating body 140 is located in the inner space of the lower support 10 in the state where it is axially connected to the drive shaft 36 of the drive motor 30 extending into the lower support body 10, A through hole 146 through which the chip is removed and the purified cutting fluid is discharged is provided, and a rotary blade 142 is provided on the central portion. The through holes 146 may be annularly arranged with respect to the axial center of the rotating body 140.

On the other hand, the rotary blade 142 provided in the rotating body 140 provides the strongest centrifugal force to the suctioned cutting oil, but must operate stably even if it is operated for a long time under the influence of chips. Considering only the former condition, it is appropriate to have a plurality of blade structures. In this case, the latter condition may not be satisfied. Accordingly, in order to provide a suitable centrifugal force to the cutting oil but to ensure stable operation for a long time even under the influence of chips, the present invention can be applied to the rotary blade 142 of the rotating body 140, And a cross section AA 'is formed in a triangular prism shape.

In addition, the present invention does not exclude the case where the chip filter 150 is provided as a means for suppressing the influence of the chip on the rotating body 140 as much as possible. The chip filter membrane 150 is installed inside the lower support body 10 and the rotating body 140 is located inside the chip filter membrane 150. It is preferable that the chip filter 150 be formed in an annular structure so as to completely surround the rotating body 140, and it is preferable that the chip filter 150 has a conventional network structure.

The impeller 160 is mounted at the lower end of the rotating body 140 as a portion for sucking the cutting oil. More specifically, it is positioned inside the lower support 10 opposite to the coolant inlet 12 provided at the lower side of the lower support 10. 1, the cutting oil sucked by the impeller 160 is positioned on the upper portion of the impeller 160 and passes through the hole 176 of the fixing plate 170 coupled to the lower portion of the lower support 10, 14). The holes 176 may be formed of a plurality of holes.

The gear pump part is a part for forcibly feeding the purified cutting oil separated from the chip, and is mounted on the upper support body 20 at the lower part of the drive motor 30. [ The gear pump unit may include a discharge plate 220, a gear pump 240, and a guide plate 260, and will be described in detail with reference to FIG. 2 attached hereto.

The backing plate 220 is a portion where the cleaned cutting oil is discharged. A space of a certain size is formed in the discharge plate 220, and a coolant discharge port 226 is formed at one side thereof and a discharge groove 224 is provided at a lower surface thereof. The discharge groove 224 and the coolant discharge port 226 communicate with the inner space of the discharge plate. In addition, an insertion hole 228 through which the drive shaft 36 of the drive motor 30 is inserted is provided at the center of the discharge plate. The discharge groove 224 may be formed as a pair of mutually opposed faces with respect to the insertion hole 228. Reference numeral 222 denotes a pressure regulating means.

The gear pump 240 includes a main body 242 and an outer gear 243 and an inner gear 244 which are inserted into the main body 242. A drive motor 30 is disposed at the center of the inner gear 244, The insertion hole 248 into which the drive shaft 36 of the drive shaft 36 is inserted is provided. The outer gear 246 is rotated by the gear teeth formed on the inner gear 244 and the outer gear 246 when the inner gear 244 rotates in accordance with the rotational force of the drive motor 30. [ When the inner gear 244 and the outer gear 246 rotate, the space 245 formed therebetween rotates, and the cleaned oil is sucked by the pressure difference generated thereby.

The induction plate 260 is fixedly coupled to the upper portion of the lower support 10 and specifically to the upper portion of the rotating body 140. The induction plate 260 has an insertion hole 268 through which the drive shaft 36 of the drive motor 30 is inserted, And a groove 266 through which the cleaned cutting oil is discharged is formed at one side of the insertion hole 268. The specific shape of the groove 266 is not limited to that shown in the drawings and can be changed. The discharge plate 220 and the gear pump 240 may be fixed to the induction plate 260 by separate fastening means.

The operation of the present invention having the above-described configuration will be schematically described with reference to the accompanying drawings and the foregoing description.

When the drive motor 30 is operated, the rotational force of the drive motor 30 is transmitted to the impeller 160 through the drive shaft 36. When the impeller 160 rotates, a suction force is generated due to the rotation. Accordingly, the cutting oil, which is discharged from the cutting process and temporarily stored in the water tank, is discharged through the cutting oil inlet 12 to the inner space (14).

The cutting oil flowing into the inner space 14 of the lower support body 10 is subjected to strong centrifugal force by the rotating body 140 rotating according to the operation of the drive motor 30 The centrifugal force acting on the chip is more strongly applied to the solid chip contained in the cutting oil, so that the chip is separated from the cutting oil (3), and the separated chip is pushed by the cutting oil continuously flowing from the lower part together with the centrifugal force, (4).

The chip which is not removed by the centrifugal force but moves to the rotating body 140 together with the cutting oil is finally filtered by the chip filter 150 and the cleaned oil (⑤) which has been completely removed by the chip is pumped to the pumping force of the gear pump part (⑥) through the through hole 146 of the rotating body 140, and then enters the discharge groove 266 of the induction plate 260 (⑦). The cleaned cutting oil passed through the induction plate 260 is discharged through the discharge groove 245 of the gear pump 240 and the discharge groove 224 of the discharge plate 220 through the cutting oil discharge port 226, Is inserted again into the cutting process of the illustrated machine tool (8). As this operation is continuously repeated, the coolant including the chips discharged through the cutting process is cleanly cleaned.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. It will be apparent that the present invention can be practiced with added features.

10: lower support 20: upper support
30: drive motor 140: rotating body
150: Chip filter 160: Impeller
240: Gear pump

Claims (3)

A lower support 10 having a lower portion where the coolant inlet 12 protrudes into the lower oil tank 1 and an upper portion where the chip outlet 16 is provided is fixedly coupled to the upper surface of the lower oil tank 1;
An upper support 20 fixedly coupled to the upper portion of the lower support 10;
A drive motor (30) fixed to the upper surface of the upper support (20) and having a drive shaft (36) extending into the lower support (10);
A plurality of through holes 146 through which the cleaned cutting oil is discharged are installed on the upper side of the lower support body 10 and are connected to the drive shaft 36 of the drive motor 30, A rotating body 140 provided with a rotating shaft 140;
An impeller 160 positioned inside the lower support 10 facing the coolant inlet 12 of the lower support 10 and mounted at the lower end of the rotator 140;
The centrifugal force is transmitted to the rotating body 140 by the centrifugal force after being sucked by the impeller 160 and then being connected to the driving shaft 36 of the driving motor 30, A gear pump unit for forcedly feeding the separated cutting oil;
Wherein the gear pump and the impeller pump are integrally structured. The method according to claim 1,
Wherein the rotating blade (142) of the rotating body (140) has a triangular cross section. The method according to claim 1,
The lower support (10) is provided with an annular chip filter membrane (150) and the rotating body (140) is located inside the chip filter membrane (150). The gear pump and the impeller pump Cutting oil purifier.

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