JPS58180710A - Lubricating device of air motor - Google Patents

Abstract

PURPOSE:To both form a lubricating device to compact size and improve lubricating performance, by integrally providing an automatic oil supply mechanism of a lubricating oil reservoir part, lubricating oil atomizer nozzle and an oil passage or the like to the casing of an air motor. CONSTITUTION:Compressed air flowing into an air supply passage 9 is partly fed into a lubricating oil reservoir part 20 from an air introducing hole 35 provided to a point tapered part 30 of an oil atomizing member 29 through an air communication hole 36 provided to a casing side to press a liquid level of lubricating oil, and the lubricating oil flows in through an oil communication hole 24 from an oil filter 25 and is fed to a lubricating oil atomizer nozzle 26. The lubricating oil forcibly fed to the nozzle 26 is blown from an injection valve 32 into an atomized oil passage 33 of the member 29 under an atomized condition and mixed with compressed air flowing in an air hole 34 to flow into the passage 9 and into a turbine wheel chamber 3 and lubricate the sliding part between a rotor 5 and rotary blade 4 and the sliding part in a point end of the blade 4.

Description

DETAILED DESCRIPTION OF THE INVENTION By integrating an automatic oil supply mechanism such as an oil reservoir, a lubricant spray nozzle, and an oil passage, it is intended to make the lubricating device more compact and improve the lubricating performance of the device.

Among internal combustion engines such as diesel engines, air-start internal combustion engines, in particular air-started internal combustion engines that use a compressed air source attached to the engine, are usually equipped with a large number of movable rotary blades as a starting device. Vane type air motors are often used in which a rotor is rotatably housed in a cylinder and compressed air is introduced into the cylinder to rotate the rotor at full speed. Since the sliding parts between the rotor and the rotary blades and the sliding parts between the tips of the rotary blades and the inner surface of the cylinder are subject to severe wear, it is necessary to supply sufficient lubricating oil to these parts.

Therefore, in conventional air motors, a lubricating oil tank and a lubricating oil spray generating nozzle are provided at a location remote from the air motor, and the lubricating apparatus and the compressed air supply passage of the air motor are connected by gas piping. The lubricating oil spray generated by the oil supply device is mixed with compressed air and introduced into the cylinder to lubricate the sliding parts.

However, in such conventional air motor lubricating devices, the air motor and the oil supply device are provided separately, and therefore piping is required to connect the oil supply device and the air motor. (In order to prevent the piping from steadying, a support member for the piping is required.P) Since piping space is required around the air motor, it becomes difficult to install other internal combustion engine accessories. )
Since the lubricant spray part of the oil supply device and the sliding part of the air motor are connected by a long pipe, most of the lubricant spray liquefies on the way and is not sufficiently distributed. Due to various causes such as these, there have been problems such as an increase in the size of the device, an increase in the number of parts, and deterioration of lubrication performance.

The present invention focuses on problems such as the increase in the size of the lubricating device and the deterioration of the lubricating performance, which have been concerns in conventional air motors, and solves the aforementioned problems by completely forming the lubricating oil supply device in the casing of the air motor. It eliminates the
Its characteristic configuration is that a lubricating oil spray nozzle is provided in the driving air supply passage of the air motor, a lubricating oil reservoir is formed in the L-sing of the air motor, and one end of the lubricating oil reservoir is located inside the casing. The lubricating oil spray nozzle has an oil communicating hole that is open to the lubricating oil spray nozzle and has the other end communicating with the lubricating oil spray nozzle.

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

Figures 1 to 3 illustrate the case where the lubricating device of the present invention is air operated. An air motor (1) has a blade wheel chamber (
31, a rotor (
5), and the rotating shaft (6) of the rotor (5) is rotatably supported by a ball bearing (7) fitted in the main cylinder (2). Compressed air is introduced into the blade wheel chamber (3) from the compressed air supply passage (9) of the upper casing (8) fixed to the upper surface (2→) and the air inlet passage αC communicating with the passage (9). The rotor (5) is driven to rotate, and the used compressed air is passed through the air outlet passage U> provided at the bottom and the main cylinder (
2) is configured to discharge from the outlet passage OJ of the discharge bend 02 fixed to the lower surface (2b).

The main cylinder (2) has a clutch case a fixed to one end surface near the flywheel of the internal combustion engine.
4, and a pinion gear (5) that engages the output shaft of the rotor (5) with the ring gear of the flywheel via a known clutch mechanism provided in the clutch case I.
When the rotor (5) rotates when the engine is excited to start, the pinion gear (151 automatically moves in the direction indicated by the arrow) due to the action of the aforementioned pinion clutch mechanism, and the flywheel rotates around a predetermined circumference. When the speed is exceeded, the pinion gear (15) automatically returns in the direction of the arrow (■) and disengages from the ring gear.

On the other hand, α6) is an intermediate casing connected in contact with the opposite end face of the main cylinder f21, and the intermediate casing (161) has a hollow portion (lη) recessed inwardly from the outer end face within the intermediate casing (161). A lubricating oil reservoir (2) is formed by fluid-tightly sealing the side opening of the cavity Cl71 with a lid member (191) which is properly attached with a bolt (181).

The air motor (1) having the above configuration has oil holes 21+, 1221, 1231, and
The oil communicating hole (241) is connected to each other and formed, and one end of the oil communicating hole (241) is connected to the lubricating oil storage part (241).
)), which opens through the oil strainer (25) and communicates with the lubricating oil spray nozzle provided on the other end side or the upper part of the upper casing (8), and is connected to the middle of the passage. The lubricating oil spray nozzle (2) is equipped with a check valve to prevent backflow from the lubricating oil spray nozzle (2) to the reservoir side.

The lubricating oil spray/zzle (2) is produced by inserting an oil spraying member (support) made of a transparent material into a nozzle insertion hole (support) formed vertically from the upper surface of the upper casing (8), and The injection valve main body is provided with a small diameter end portion C1m inserted so as to cross the air supply passage (9), and a needle valve inside the oil spray member (2) via the upper gasket C3υ.
321 is screwed on, and the tip of the injection valve body C33 is inserted into the spray oil passage formed inside the oil spray member (2).

The oil spraying member has air holes (holes) formed in the narrow diameter portion (end) of the oil spray member in parallel with the air flow direction in the air supply passage (9), as shown in an enlarged view in FIG. The air hole is perpendicular to the spray oil passage, and one end opens facing the flow of compressed air below the air hole, and the other end opens to face the flow of compressed air. is provided with an air introduction hole C (51) that opens at the lower end of the narrow tip diameter portion (2).

The air introduction hole 035+ is the air supply passage (9)''
Fr: Part of the compressed air passing through the upper casing (8
), the main cylinder (2) and the air communicating hole 061 formed in the wall on the intermediate casing side lead to the lubricating oil reservoir part (■), and serve to increase the internal pressure of the lubricating oil reservoir part. , by inserting the tip of the oil spraying member into the opening (36a) of the air communication hole (support) 1 opened on the lower surface of the air inlet passage (9), the air communication hole (
361, compressed air is blown into the air communication hole (36).

In the figure, C37) is a check valve installed in the middle of the air communication passage (■), C31 is a drain plug, (41 is oil hole CL!) is a filler oil plug screwed onto the upper part of the intermediate casing αe,
This is a blind plug that seals the end opening of the n-hole.

In addition, a viewing window (4) is provided on the side of the upper casing (8).
υ is provided so that the state of oil spray from the injection valve C (21) can be visually confirmed through the viewing window (4υ) through the peripheral wall of the transparent oil spray member (c).

The air motor lubricating device of the present invention has the above-mentioned configuration. Next, its operation will be explained. First, when starting the engine, the air motor (1) is supplied with compressed air through the compressed air supply passage (9) to the blade wheel chamber (1). When compressed air is introduced into the rotor (5), the compressed air rotates the rotor (5), and the pinion gear (151) moves in the direction of the arrow (X) and meshes with the ring gear provided on the flywheel of the engine to rotate the crankshaft of the engine. Rotation encourages starting.

At this time, a part of the compressed air that has entered the air supply passage (9) is transferred from the air introduction hole (39) provided at the small diameter tip of the oil spray member to the air communication hole c provided on the casing side. The lubricating oil enters the lubricating oil reservoir (1) through the oil reservoir (1) through the oil reservoir (1), and presses the liquid level of the lubricating oil in the reservoir (a), so that the lubricating oil with increased pressure passes from the oil strainer (c) to the oil communication hole [ ] to the lubricating oil spray nozzle ■.

In this process, the lubricating oil force-fed to the lubricating oil spray nozzle (■) is blown into the spray oil passage Q of the oil spray member (■) from the injection valve G in an atomized state, and the air hole (i.e., )
The mixture flows into the air supply passage (9), enters the blade wheel chamber (3), and connects the rotor (5) and rotor blades (
4) Lubricate the sliding parts with the rotating blade (4) and the sliding parts at the tip of the rotor blade (4).
This reduces the sliding resistance of the portion and also suppresses wear.

Further, when the compressed air supply to the air supply passage (9) is cut off thereafter, the rotation of the rotor (5) is stopped and the lubricating oil reservoir (
2(+1) stops, the pressure in the reservoir (2) decreases, the lubricant supply to the lubricant spray nozzle 1 is cut off, and lubricant spraying stops.

As described above, the air motor lubrication device of the present invention includes a lubricant spray nozzle provided in the air supply passage for driving the air motor,
A lubricating oil reservoir is formed in the casing of the air motor, and an oil communication hole is formed inside the casing, one end opening to the lubricating oil reservoir and the other end communicating with the lubricating oil spray nozzle. Since the lubricating oil supply device is integrated with the air motor, there is no need for long piping to guide the lubricating oil spray to the air motor as in conventional air motors, and piping members and piping support members can be omitted. This greatly reduces the number of parts, making it easier to install the air motor, and the lubricating device is less bulky and more compact, reducing the space required to install the air motor.
In addition to making it easier to install other parts and equipment, the oil spray passage is further shortened and re-liquefaction of the lubricating oil spray is prevented.
The lubricating oil spray N is sufficiently distributed to every corner of the air motor sliding part, and the mechanical wear of the air motor is reduced.

[Brief explanation of drawings]

Fig. 1 is a schematic partial cross-sectional view showing an example of an internal combustion engine starting air motor to which the air motor lubricating device of the present invention is applied, Fig. 2 is a schematic cross-sectional view of the air motor shown in Fig. 1 viewed from the left, and Fig. 3 FIG. 2 is an enlarged sectional view showing details of a lubricating oil spray mixing portion. (1) Air motor, (2+ (8) (1) Casing. (9) Compressed air supply passage, (To) Oil communication hole. ■ Lubricant oil spray nozzle.

Claims (1)

[Claims] l A lubricating oil spray nozzle is provided in the compressed air supply passage of the air motor, and a lubricating oil reservoir is formed in the casing of the air motor, and one end is opened to the lubricating oil reservoir inside the casing, and the other end is open to the lubricating oil reservoir. An air motor lubricating device characterized in that an oil communication hole is formed to communicate with the lubricating oil spray nozzle.