JPH0539256Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a spray oil feeder that sprays and mixes lubricating oil into compressed air flowing through a flow path.

[Conventional technology]

Conventionally, in this type of spray oil feeder, compressed air that flows into an inlet flows through a flow path that communicates between the inlet and the outlet, and the flow is accelerated by a throttle hole provided in the middle of the flow path. flows out to the exit.

As shown in FIG. 3, the throttle hole 41A provided perpendicularly to the flow path communicating between the inflow and outflow ports is a diameter-reducing portion that communicates with the inflow port side of the flow path and gradually decreases in diameter from above to below. 41B and an enlarged diameter part 41C that is connected to the smallest diameter side of the reduced diameter part 41B and whose diameter gradually increases, and is opened in the throttle hole 41A.
2A is a reduced diameter part 41 whose opening end 42B is an aperture hole 41A.
The dripping path is provided hanging from above so as to be located at the connecting portion 41D of the enlarged diameter portion 41C, and the vicinity of the opening end 42B of the dripping path 42A is brought into a negative pressure state by the speed increasing action of the compressed air flowing through the throttle hole 41A. 42A of lubricating oil is aspirated and spray mixed into the compressed air.

[Problem that the invention attempts to solve]

However, when the pressure difference between the inlet side pressure and the outlet side pressure is small, the compressed air that flows from the inlet through the flow path to the throttle hole 41A flows along the wall surface of the enlarged diameter portion 41C of the throttle hole 41A. Therefore, the lubricating oil sucked from the dripping path 42A due to the speed increasing action of the compressed air is not caught up in the compressed air and is not atomized, but is mixed with the compressed air in the form of oil droplets, and the lubricating oil is atomized and released into the compressed air. There was a problem that good spray mixing could not be obtained.

The present invention solves this problem by allowing compressed air to flow linearly between the reduced diameter part and the enlarged diameter part of the throttle hole to ensure good entrainment of lubricating oil. The object of the present invention is to provide a spray lubrication device that is capable of atomizing and spraying and mixing.

[Means for solving problems]

Therefore, in the present invention, a flow path is formed by communicating between the inflow and outflow ports in a fuel supply main body having an inflow port and an outflow port for compressed air, and the flow path is located at a position below the position of the flow path that communicates between the inflow and outflow ports. In addition to providing a tank for storing lubricating oil, an oil dripping chamber is provided to drip the lubricating oil stored in the tank to a position above the flow path position, and a flow of compressed air is provided in the middle of the flow path that communicates between the inlet and outlet. A throttle member with a throttle hole in the vertical direction that increases the speed is installed, and one end opens to the oil dripping chamber and the other end is a throttle so that the lubricating oil dripped from the oil dripping chamber can be sprayed into the compressed air flowing through the flow path. A drip passage that opens into the throttle hole of the member is provided concentrically with the throttle hole and hangs down from the oil drip chamber, and the diameter of the throttle hole of the throttle member gradually decreases downward from the part that communicates with the inlet side of the flow path. The reduced diameter part is connected to the smallest diameter side of the reduced diameter part, and the same diameter part with the same diameter as the minimum diameter of the reduced diameter part is connected to the side opposite to the side where the reduced diameter part is connected to the same diameter part. The other end of the drip path, which opens into the throttle hole, is located between the constricted diameter part of the throttle hole and the continuous part of the same diameter part, and near the upper part thereof. Become.

[Effect]

In the configuration of the present invention, the compressed air flowing through the throttle hole flows linearly in the same diameter part between the reduced diameter part and the enlarged diameter part, regardless of the pressure difference between the inlet side pressure and the outlet side pressure, and the compressed air flows straight through the throttle hole. The lubricating oil sucked from the dripping path whose other end opens between the contiguous part of the reduced diameter part and the same diameter part of the hole near the top is caught up in the compressed air and becomes fine, so the lubricating oil is always present in the compressed air. It is possible to obtain good spray mixing by atomizing and spray mixing.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In Fig. 1, reference numeral 1 indicates a lubricator main body, which has an inlet 2 connected to the compressed air pressure source side and an outlet 3 connected to the pneumatic actuator side. Continuous flow channels 4 and 5 are provided with openings on the lower surface, respectively. Reference numeral 6 denotes a tank member integrally fixed to the lower surface of the oil supply main body 1;
A space 7 is formed by recessing the side surface of the part where the oil filler body 1 is opened, and the flow passages 4 and 5 are communicated through this space 7 to form a flow passage for compressed air. At the same time, a small-capacity secondary tank 8 for storing lubricating oil is formed at the bottom of the space 7, that is, at the tank member 6. 9 is the flow path 4 of the oil supply main body 1
A throttle member disposed inside has a throttle hole 10A vertically penetrating therein for communicating with the flow path 4 via the flow hole 11 and speeding up the flow of compressed air. As shown in detail in FIG. 2, the aperture hole 10A
is connected to the smallest diameter side of the reduced diameter part 10B and the reduced diameter part 10B whose diameter is gradually reduced downward from the part where the communication hole 11 communicating with the flow path 4 communicates, and is the same as the minimum diameter of the reduced diameter part 10B. It is composed of an equal-diameter portion 10C and an enlarged-diameter portion 10D that gradually increases in diameter and is connected to the opposite side of the same-diameter portion 10C to the side on which the reduced-diameter portion 10B is connected. Reference numeral 14 denotes a lubricating oil discharging member disposed above the throttle member 9, which is a dripping chamber which is provided above the flow path position and has one end open to the oil dripping chamber 19 into which lubricant is dripped, and the other end opened into the throttle hole 10A. 14A is formed to penetrate and hang down from the oil dripping chamber 19 concentrically with the throttle hole 10A. As shown in detail in FIG. 2, the other end 14B of the drip path 14A opens into the aperture hole 10A.
A continuous portion 10 of the reduced diameter part 10B and the same diameter part 10C
It is located at E.

Reference numeral 16 denotes a rod-shaped plug member that is screwed and fixed to the lower opening of the flow path 4 of the oil supply main body 1, and has a throttle hole 1 inside.
A communication hole 17 is provided that communicates between the enlarged diameter portion 10D of 0A and the space 7 and forms a communication channel between the inlet and outlet. Reference numeral 18 denotes an oil passage whose one end communicates with the oil dripping chamber 19 and the other end communicates with the secondary tank 8. Reference numeral 20 denotes a primary tank that stores a large capacity of lubricating oil. The lid member 22 is fastened to the member 2 so as to close the lower opening of the cylindrical member 21 through the
3, it is fixed and formed. Reference numeral 24 designates an intermediate tank that is partitioned into the primary tank 20 and stores lubricating oil to be sent to the secondary tank 8, and is formed by sealingly sandwiching a small hollow cylindrical member 25 between the tank member 6 and the lid member 22. The intermediate tank 24 has a space 7 in a through hole 26 formed at the bottom of the recess of the tank member 6.
It is designed to communicate with 27 is a check valve,
It is arranged in a flow path 28 provided in the lid member 22 so as to communicate between the primary tank 20 and the intermediate tank 24, and is closed when the internal pressure of the primary tank 20 decreases, allowing lubricating oil to flow from the intermediate tank 24 to the primary tank 20. It is provided to block the flow path. 29 has one end connected to the flow path 4 in front of the throttle hole 10A and the other end connected to the intermediate tank 2.
4, an air supply passage 30 opens into the stored lubricating oil at one end, so that the stored lubricating oil is upwardly delivered to the secondary tank 8 by the action of the compressed air flowing out from the air supply passage 29 into the intermediate tank 24; This is an oil feed path which is fixed to the plug member 16, communicates with the space 7 above the secondary tank 8, and has its other end fitted externally to the other end of the air feed path 29 with a gap. Reference numeral 31 denotes a plug member that is removably screwed into an oil filler port 32 provided at the top of the primary tank 20, and constitutes lubricating oil filler means. Reference numeral 33 denotes a check valve that disconnects communication between the primary tank 20 and the flow path after the throttle hole 10A, that is, the space 7. The check valve 33 is axially pressed by the outer peripheral surface of the plug member 31 to operate to open, and also closes the plug member 31 to the oil filler port 32. It is provided so that it is closed by a spring 34 when it is separated from the holder.

Next, the operation of this configuration will be explained.

The compressed air flowing into the inlet 2 flows out from the flow path 4 through the throttle hole 10A of the throttle member 9, the communication hole 17 of the plug member 16, the space 7, and the flow path 5, and then flows out to the outlet 3. When this compressed air flows through the throttle hole 10A of the throttle member 9, the flow is accelerated and the vicinity of the opening of the drip path 14A is brought into a negative pressure state, and a part of the flow path in front of the throttle hole 10A is Also, a part of the flow path after the throttle hole 10A pressurizes the lubricating oil stored in the secondary tank 8, and flows through the space 7 and the check valve 33 to pressurize the lubricating oil stored in the primary tank 20. Acts under pressure. The lubricating oil stored in the primary tank 20 is
The liquid flows through the open check valve 27 and the flow path 28 and is stored in the intermediate tank 24 . The lubricating oil stored in the intermediate tank 24 is sent upward through the oil feed path 30 by the action of compressed air flowing through the air feed path 29 and stored in the secondary tank 8 . The lubricating oil stored in the secondary tank 8 flows through the oil passage 18 and the oil dripping chamber 19 and is sprayed from the dripping passage 14A due to the pressurizing action of the compressed air and the suction action due to the negative pressure generated when the compressed air flows through the throttle hole 10A. and then atomized and mixed into compressed air.

During this operation, when the lubricating oil stored in the primary tank 20 falls below the minimum allowable amount and the plug member 31 is removed from the oil filler port 32 in order to supply lubricating oil, the check valve 33 is closed by the biasing force of the spring 34. As a result, the internal pressure of the primary tank 20 decreases, and due to this decrease in internal pressure, the flow path 2
When the lubricating oil of No. 8 flows slightly toward the primary tank 20 side, the check valve 27 closes and blocks the lubricating oil flow path from the intermediate tank 24 to the primary tank 20. As described above, the lubricating oils stored in the intermediate tank 24 and the secondary tank 8 continue to be sprayed and mixed with the compressed air by flowing respectively. Primary tank 2
When the filling of lubricating oil to the tank 0 is completed and the plug member 31 is fixed to the oil filling port 32, the check valve 33 is opened and the primary tank 20 is communicated with the space 7, and the primary tank 2
The lubricating oil stored at zero is pressurized by compressed air to open the check valve 27 and flow out into the intermediate tank 24.

In this operation, the inlet 2 side pressure and the outlet 3
Regardless of the pressure difference between the side pressures, the compressed air flowing through the throttle hole 10A flows linearly through the same-diameter portion 10C, and the lubricating oil sucked from the dripping path 14A gets caught up in the compressed air and becomes fine, making it more compact than the conventional one. However, it is possible to obtain good spray mixing in which the lubricating oil is always atomized and mixed with the compressed air.

In addition, the other end 14B of the dripping path 14A is connected to the throttle hole 10.
A continuous portion 10 of the reduced diameter portion 10B and the same diameter portion 10C
Since it is located between E and the vicinity above it, the length of the same-diameter portion 10C through which compressed air flows linearly can be shortened, and good spray mixing can be obtained.
It is possible to suppress the enlargement of the diaphragm member 9 having 0A. Furthermore, the reduced diameter portion 41B of the aperture hole 41A
A drip path 42A is connected to the connecting portion 41D of the enlarged diameter portion 41C.
Compared to the conventional structure in which the opening end 42B of the dripping path 14A is located at the same position, the positioning of the other end 14B of the dripping path 14A can be easily manufactured without requiring high precision. In one embodiment, the other end 14B of the dripping path 14A is connected to the throttle hole 1.
Although it was provided to be located at the continuous part 10E of 0A,
Of course, it may be located anywhere between the continuous portion 10E and the vicinity above it.

[Effect of idea]

As described above, according to the present invention, a flow path is formed by communicating between the inflow and outflow ports in the oil supply main body having the inflow and outflow ports for compressed air, and the flow path is formed below the flow path position communicating between the inflow and outflow ports. A tank for storing lubricating oil is provided at a position, and an oil dripping chamber is provided for dripping the lubricating oil stored in the tank at a position above the flow path position.
A throttle member having a vertical throttle hole that accelerates the flow of compressed air is installed in the middle of the flow path that communicates between the inlet and outlet, and the lubricating oil dripped from the oil dripping chamber is compressed to flow through the flow path. A drip path is provided concentrically with the oil dripping chamber, with one end opening into the oil dripping chamber and the other end opening into the throttle hole of the throttle member so that the air can be sprayed. A diameter-reducing part whose diameter gradually decreases downward from the part that communicates with the inlet side of the channel, and a same-diameter part that is connected to the smallest diameter side of the reduced-diameter part and has the same diameter as the minimum diameter of the reduced-diameter part. It consists of a converging diameter part of the part and an increasing diameter part that gradually increases in diameter on the opposite side, and the other end of the drip path opening into the aperture hole has the same diameter as the converging part of the aperture hole. Since the lubricating oil is located between the continuous part of the part and the upper vicinity thereof, it is possible to obtain good spray mixing in which the lubricating oil is always atomized and mixed with the compressed air.

In addition, since the other end of the dripping path is located between the reduced diameter part of the throttle hole and the continuous part of the same diameter part and the upper vicinity thereof, the length of the same diameter part through which compressed air flows linearly is increased. The length can be shortened and good spray mixing can be obtained.
It is possible to suppress the enlargement of the aperture member having the aperture hole. Furthermore, compared to the conventional method in which the opening end of the drip path is located at the contiguous part of the constricted diameter part and the expanded diameter part of the aperture hole, the other end of the drip path can be easily positioned without requiring high precision. It has an effect that can be manufactured.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of the present invention. Figure 1 is a longitudinal cross-sectional view of a spray lubrication device, Figure 2 is an enlarged cross-sectional view of section A in Figure 1, and Figure 3 is a conventional FIG. 3 is an enlarged cross-sectional view of an example. 2... Inflow port, 3... Outlet port, 4, 5... Channel, 10A... Throttle hole, 10B... Diameter reduction part, 10
C... Same diameter part, 10D... Expanded diameter part, 10E... Continuous part, 14A... Dripping path.

Claims (1)

[Scope of utility model claims] A tank in which a flow path is formed by communicating between the inflow and outflow ports in a lubricant main body having an inflow and an outflow port for compressed air, and lubricating oil is stored at a position below the flow path that communicates between the inflow and outflow ports. At the same time, an oil dripping chamber is provided for dripping the lubricating oil stored in the tank to a position above the flow path position, and a throttle hole is provided in the middle of the flow path that communicates between the inlet and outlet to accelerate the flow of compressed air. A throttling member having a vertical direction is arranged, and one end opens into the oil dripping chamber and the other end opens into the throttling hole of the throttling member so that the lubricating oil dripped from the oil dripping chamber can be sprayed into the compressed air flowing through the flow path. The opening drip passage is provided concentrically with the throttle hole and hangs down from the oil drip chamber, and the throttle hole of the throttle member has a diameter-reducing portion that gradually decreases in diameter downward from the part that communicates with the inlet side of the flow passage. An enlarged diameter part that is connected to the smallest diameter side of the diameter part and that gradually increases in diameter by being continuous to the opposite side of the same diameter part that has the same diameter as the minimum diameter of the reduced diameter part and the side where the reduced diameter part is connected to the same diameter part. A spray oil supply device comprising a dripping passage which opens into the throttle hole, and the other end of which is located in the vicinity of the upper part of the continuous part of the reduced diameter part of the throttle hole and the same diameter part.