JPS5850160Y2 - Lubricating oil exchange device - Google Patents

Description

[Detailed description of the invention] This invention relates to a lubricating oil exchanging device for exchanging lubricating oil sealed in moving parts of mechanical parts with new lubricating oil, and in particular, for exchanging lubricating oil etc. for track links, track rollers, etc. This is suitable for use in the case of replacement.

This invention enables the sealing of relatively high viscosity lubricating oil by discharging the sealed lubricating oil using a vacuum pump, and then injecting new lubricating oil at the required pressure while keeping the lubricating oil sealing part at a near vacuum. The lubricating oil can be reliably discharged from the storage area, and new lubricating oil can be reliably injected even in places where the space in the enclosure is narrow. This is what I did.

Embodiments of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a replacement device according to the present invention, in which a lubricating oil storage tank 4 and a vacuum tank 5 are placed on a movable trolley 2, and an oil tank connected to an electric motor 6 and driven to rotate is placed on top of these tanks. It has a configuration in which a supply pump 7 and a vacuum pump 8 are arranged, and an oil supply port 9 and an oil drain port 10 that are connected to the parts to be lubricated through, for example, a hose are attached.

j=-12 is a drain pulp disposed at the bottom of the vacuum tank 5, 13.14 is a liquid level gauge for tanks 4 and 5, and 15 is a pressure gauge.

Each of the above-mentioned members is connected as shown in FIG.

That is, the suction side of the oil supply pump 7 is connected to the oil tank 4, the discharge side is connected to the oil supply port 9 via the switching valve 17, and the suction side of the vacuum pump 8 is connected to the vacuum tank 5. The oil socket 10 and the oil supply port 9 are each a switching valve 1.
8.19, the switching valve 19 and the oil supply port 9
A pressure gauge 15 is arranged in the pipe line between them.

Note that 20 indicates that the discharge pressure of the supply pump 7 is a predetermined value (for example, 3
This is a relief valve that returns the discharged oil to the tank 4 when it reaches the pressure (ky/cm).

Next, the operation according to the above-described configuration will be explained.

For example, as shown in FIG. 3, a pin 22 has links L' press-fitted at both ends into a bushing 21 press-fitted into a link L.
is loosely inserted, and seal members 23 and 24 are respectively disposed on the inner circumferential surface of both ends of the brush foot 210. The lubricating oil passage 25 provided in the pin 22 passes through the sealing portion between the inner circumferential surface of the bushing and the outer circumferential surface of the pin. The so-called S, A in which lubricating oil 27 is sealed in 26
,L.

To change the lubricant on the T-trunk link, first
Remove the sealing plugs 28 and 29 at both ends of 20, and connect the oil supply port 9 and oil drain port 10 to these, respectively.

Next, by opening only the switching valve 18 with the switching valves 17 and 19 closed, the sealed lubricating oil is transferred to the vacuum pump 8.
is sucked by the vacuum tank 5 and stored in the vacuum tank 5.

Next, when the switching valve 17 is opened while the switching valve 18 is closed and the enclosure section 26 is kept in a vacuum, the supply pump 7 supplies the tank 4.
The lubricating oil 27 inside is pressurized into the sealing part 26, and when the pressure inside the pipe reaches a predetermined value, the relief valve 20 opens and the oil discharged from the supply pump 7 is returned to the tank 4.

Thereafter, the switching valve 17 is closed, the supply port 9 and the socket 10 are removed from the pin 22, and the sealing plugs 28, 29 are screwed on, thereby completing the lubricating oil exchange.

To test the tightness of the sealing members 23, 24, open the switching valve 1 with the switching valve 17, 18 closed as described above.
8 to drain the lubricating oil, then close the switching valve 18, or open the switching valve 19 with the switching valves 17 and 18 closed to connect the sealing part 26 to the vacuum tank 5, and the sealing part 26 can be connected to the vacuum tank 5. The degree of vacuum in the section 26 is indicated by the pressure gauge 15, and the suitability of the sealing member can be determined based on the indicated value.

As described above, according to the present device, the oil supply port and the oil drain port are connected to the enclosed part filled with lubricating oil, and the waste oil is discharged into the vacuum tank by the vacuum pump, so the sealed space is Even if the lubricating oil enclosure is narrow and difficult to drain, the lubricating oil can be discharged reliably, and new lubricating oil is press-fitted while keeping the enclosed area in a vacuum, so there is no need to worry. It has the characteristic that it can be injected reliably without any problems.

Incidentally, if lubricating oil is press-fitted without creating a vacuum in the sealed part, the air remaining in the sealed part at the time of press-in will intervene in a compressed state near the sealing member, preventing the lubricating oil from entering, and damaging the sealed part. However, the present invention does not cause such inconvenience at all.

In addition, by installing pressure gauges in the vacuum tank and the lubricating oil enclosure, it is possible to test the sealing quality of the sealing member in the enclosure at the same time as the lubricating oil is replaced, making it extremely easy to manage the sealing members. It also has the advantage of being practical.

Although the case where the oil supply port and the drain oil socket are provided separately on the upper side has been described, the oil drain port 10 and the switching valve 18 can also be used by the oil supply port 9 and the switching valve 19. Good too.

In addition, in the above section, we have explained the case where the proposed device is applied to lubricating oil exchange of S, A, L, TI, and tanks, but it can also be applied to lubricating oil exchange of track rollers and other lubricating oils, and even oil exchange other than lubricating oil. It is possible.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an example of the present device, FIG. 2 is a piping connection diagram thereof, and FIG. 3 is a sectional view showing a track link to which the present device can be applied. 4 is an oil tank, 5 is a vacuum tank, 7 is an oil supply pump, 8
is a vacuum pump, 9 is an oil supply port, 10 is an oil drain port, 15 is a pressure gauge, and 17, 18, and 19 are switching valves.

Claims (2)

[Scope of utility model registration request] (1) It has an oil tank 4 for storing lubricating oil, etc., and a vacuum tank 5 connected to a vacuum pump 8, and the oil tank 4 is connected to an oil supply port 9 via an oil supply pump T and a switching valve 17.
The vacuum tank 5 is connected to the drain oil socket 10 via a switching valve 18, and the vacuum tank 5 and oil supply port 9 are connected via a switching valve 19, and the switching valve 19 and A lubricating oil exchange device comprising a pressure gauge 15 connected between oil supply ports 9. (2) The device according to claim 1, wherein the oil drain port 10 and the switching valve 18 are also used as the oil supply port 9 and the switching valve 19.