JP3086359B2 - Lubricating device for resholm type turbocharger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating device for a Richolm type supercharger.

[0002]

2. Description of the Related Art FIG. 2 to FIG. 4 show an example of a conventionally-considered rechargeable supercharger. In a casing 1, an input shaft 2, a male rotor 3, and a female rotor 4 are provided. As will be described later, the rotation of the input shaft 2 causes the male rotor 3 and the female rotor 4 to rotate. A helical ridge 3a is formed on the outer periphery of the male rotor 3 and a helical concave groove 4a is formed on the outer periphery of the female rotor 4.
When the male rotor 3 and the female rotor 4 rotate, air is sucked in from one end on the left side in FIG. 3 and the air is compressed between the male rotor 3 and the female rotor 4. Compressed air is discharged from the other end on the right side in FIG. 3 in a direction orthogonal to the axis.

[0003] At one end on the right side of the input shaft 2 in FIG.
A damper pulley 5 exposed outside the casing 1 is fixed, and a speed increasing gear 6 is fixed to the other end on the left side of the input shaft 2 in the casing 1 in FIG. An end of the input shaft 2 on the side of the damper pulley 5 is rotatably supported by a pulley-side bearing 7, and an end of the input shaft 2 on the side of the speed increasing gear 6 is rotatably supported by a gear-side bearing 8. I have. The above-mentioned damper pulley 5 is configured to transmit the rotation of the output shaft of the engine,
The input shaft 2 is driven to rotate.

A discharge side male rotor shaft 9 is fixed coaxially to the male rotor 3 on the right air discharge side in FIG. 3 of the male rotor 3, and the discharge side male rotor shaft 9 is a male rotor discharge side bearing 10. It is rotatably supported by. The male rotor 3 is also provided on the left air intake side of the male rotor 3 in FIG.
A male rotor shaft 11 on the suction side is fixed coaxially with the male rotor shaft 11, and the male shaft 11 on the suction side is rotatably supported by a male rotor suction side bearing 12.

On the right air discharge side of the female rotor 4 in FIG. 3, a discharge female rotor shaft 13 is fixed coaxially with the female rotor 4, and the discharge female rotor shaft 13 is fixed to a female rotor discharge bearing 14. It is rotatably supported by. A suction-side female rotor shaft 15 is fixed coaxially to the female rotor 4 on the left air suction side of the female rotor 4 in FIG.
The suction side female rotor shaft 15 is rotatably supported by a female rotor suction side bearing 16.

In the vicinity of the pulley-side bearing 7, the male rotor discharge-side bearing 10, the male rotor suction-side bearing 12, the female rotor discharge-side bearing 14, and the female rotor suction-side bearing 16, lip seals 17, 18, 19, 20 and 21 are individually attached.

A speed-increasing pinion 22 meshing with the speed-increasing gear 6 is fixed to the discharge-side female rotor shaft 13, and a female rotor timing gear 23 aligned with the speed-increasing pinion 22 is provided.
Discharge side female rotor shaft 1 through the boss portion of speed-up pinion 22
It is fixed to 3. A male rotor timing gear 24 is fixed to the discharge-side male rotor shaft 9 adjacent to the male rotor discharge-side bearing 10.
Is engaged with the female rotor timing gear 23 to form a speed increasing device 25.

For example, three helical protrusions (four in FIG. 2) are formed on the outer periphery of the male rotor 3 while five helical recesses are formed on the outer periphery of the female rotor 4 (FIG. 2). 2), the ratio of the diameter of the female rotor timing gear 23 to the diameter of the male rotor timing gear 24 is 5: 3, and the rotation of the input shaft 2 is It is transmitted to the discharge-side female rotor shaft 13 and the female rotor 4 via the pinion 22, and when the female rotor 4 rotates at a rotation speed of, for example, 21,000 revolutions per minute, the male rotor 3 becomes five-thirds per minute. It rotates at a high speed of 35,000.

[0009] In the above-mentioned reshroom type turbocharger,
Since the high-speed rotation is performed, the pulley-side bearing 7,
It is necessary to reliably lubricate the male rotor discharge side bearing 10, male rotor suction side bearing 12, female rotor discharge side bearing 14, female rotor suction side bearing 16, lip seals 17, 18, 19, 20, 21 and the like.

For this reason, an oil supply port 26 is provided in the casing 1, and lubricating oil from the oil supply port 26 is supplied to the respective oil supply sections through an oil supply passage 27 formed in the wall of the casing 1. In the figure, reference numerals 28 and 29 denote waste oil ports provided in the lower part of the casing 1.

[0011] In the above-mentioned resholl type supercharger, air is sucked from one end (left side in FIG. 3) of both rotors 3 and 4 and compressed toward the speed increasing device 25, and the compressed air is compressed toward the speed increasing device 25. , The temperature of each part rises toward the speed increasing device 25 side, so that the speed increasing device 25 operates under severe conditions of high speed and high temperature. Will be done.

For this reason, it is necessary to reliably lubricate and cool the periphery of the speed increasing device 25. In particular, when the male rotor timing gear 24 and the female rotor timing gear 23 mesh with each other, the male rotor 3 and the female rotor It is necessary to perform reliable lubrication and cooling in order to adversely affect the clearance between the four and lower the compression efficiency and to cause noise due to tooth noise.

[0013]

However, conventionally, lubrication of the male rotor timing gear 24 and the female rotor timing gear 23 is performed by using one or both of the male rotor timing gear 24 and the female rotor timing gear 23 with the casing 1.
Since the lubrication method is adopted by immersing the lubricating oil in the lubricating oil stored therein, the old lubricating oil always rotates while being attached to the male rotor timing gear 24 and the female rotor timing gear 23, In addition to the problem that good lubrication and cooling are not performed, there is a problem that the male rotor timing gear 24 and the female rotor timing gear 23 wastefully lubricate the lubricating oil, resulting in a loss of driving energy.

The present invention ameliorates these conventional disadvantages,
It is an object of the present invention to provide a lubricating device for a Richolm type supercharger capable of satisfactorily lubricating and cooling a male rotor timing gear and a female rotor timing gear without causing energy loss.

[0015]

According to the present invention, there is provided an input shaft provided on one side in a casing and having a damper pulley fixed to an exposed end penetrating through the casing, and an input shaft provided on the other side in the casing and meshing with each other. A male rotor and a female rotor that draw air from the non-input shaft side, compress toward the input shaft side, and discharge in a direction perpendicular to the shaft, a speed increasing gear fixed to the rotor side end of the input shaft, and a female rotor A speed increasing pinion fixed to a side shaft and meshing with the speed increasing gear; a female rotor timing gear fixed to a boss portion of the speed increasing pinion; and a male rotor fixed to the male rotor side shaft and meshing with the female rotor timing gear. A lubricating device for a resholl type supercharger having a timing gear, wherein the lubricating device is connected to an oil supply passage provided in the casing, and the female rotor timing gear and the female rotor timing Ya and lubricating device of Lysholm type superchargers, characterized in that a fueling nozzle for jetting a lubricating oil toward the chewing away side valley in the meshing portion of, but related to.

[0016]

When lubricating oil is injected from a lubricating nozzle toward a disengaged valley in a meshing portion between a male rotor timing gear and a female rotor timing gear, a lubricating oil film is formed by the meshing of the male rotor timing gear and the female rotor timing gear. Since new lubricating oil is directly supplied to the gear surface on the disengaged disengagement side, the peripheral surfaces of the male rotor timing gear and the female rotor timing gear are always covered with the new lubricating oil, and good lubrication can be performed. Since new lubricating oil is sprayed on the surface of the gear on the disengaging side, which is the hottest, effective cooling can be performed.

Further, since the male rotor timing gear and the female rotor timing gear do not have the effect of stirring the lubricating oil for spraying the lubricating oil, the loss of driving energy can be reduced.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention applied to the resholl type supercharger shown in FIG. 3. As in FIG. 3, an input shaft 2, a male rotor 3, and a female rotor are provided in a casing 1. 4 is provided, and a speed increasing device 25 is provided by rotation of the input shaft 2.
In the configuration in which the male rotor 3 and the female rotor 4 are rotated via the gears, the male rotor timing gear 24 and the female rotor timing gear 23 provided in the speed increasing device 25 are provided.
A casing is formed such that an oil supply nozzle 32 configured to inject lubricating oil toward a disengagement side valley 31 of an engagement part 30 that rotates and meshes in the direction of an arrow communicates with an oil supply passage 27 provided in the casing 1. 1 Secure inside. In the case shown in the figure, a narrow injection port 33 is formed in the oil supply nozzle 32 so that the lubricating oil is injected toward the valley portion 31 on the disengagement side. Numeral 34 in the drawing indicates a valley portion on the biting side of the biting portion 30.

Next, the operation of the apparatus shown in FIG. 1 will be described.

When lubricating oil is injected from the oil supply nozzle 32 toward the meshing side valley 31 with respect to the meshing portion 30 of the male rotor timing gear 24 and the female rotor timing gear 23 rotating as indicated by the arrow. The lubricating oil film is cut by the engagement of the male rotor timing gear 24 and the female rotor timing gear 23, so that new lubricating oil is directly supplied to the gear surface on the disengaged side. The peripheral surface of the gear 23 is always covered with the new lubricating oil from the disengagement side valley 31 to the engagement side valley 34, so that good lubrication is performed and the temperature of the disengagement side valley 31 becomes the highest. By spraying new lubricating oil on the gear surface, cooling can be performed effectively.

Further, as described above, the meshing portion 3 of the male rotor timing gear 24 and the female rotor timing gear 23
By injecting the lubricating oil toward the valley portion 31 on the disengaging side of 0, since the male rotor timing gear 24 and the female rotor timing gear 23 do not have the effect of stirring the lubricating oil, the driving energy is reduced. Loss can also be reduced.

It should be noted that the present invention is not limited to only the above-described embodiment. The oil supply nozzle 32 communicates with the oil supply passage, and the male rotor timing gear 24 and the female rotor timing gear 2 are connected.
The casing 1 may be formed with an opening toward the disengagement side valley 31 of the meshing portion 30 with the engaging portion 3, and other various changes may be made without departing from the gist of the present invention. It is.

[0024]

According to the present invention, lubrication is performed from the refueling nozzle toward the disengagement side valley portion with respect to the meshing portion between the male rotor timing gear and the female rotor timing gear which constitute the speed increasing device of the Richolm type supercharger. Because I try to inject oil,
The lubricating oil film is cut by the engagement of the male rotor timing gear and the female rotor timing gear. New lubricating oil is directly supplied to the gear surface on the disengaged side, and accordingly, the peripheral surfaces of the male rotor timing gear and the female rotor timing gear. Is always covered with new lubricating oil, so that good lubrication can be performed, and effective cooling is achieved by spraying new lubricating oil on the gear surface at the hottest disengaged side valley. Can be performed.

Further, since the lubricating oil is injected toward the disengaged valley of the meshing portion between the male rotor timing gear and the female rotor timing gear, the male rotor timing gear and the female rotor timing gear are lubricated. Since the effect of stirring the oil is eliminated, there is an effect that the loss of driving energy can be reduced.

[Brief description of the drawings]

FIG. 1 is a view in the direction of arrow I in FIG. 3 showing one embodiment of the present invention.

FIG. 2 is a schematic perspective view showing a principle configuration of a Richolm type supercharger.

FIG. 3 is a schematic plan cross-sectional view of a Richolm type supercharger.

FIG. 4 is a perspective view of FIG. 3 viewed from an IV direction.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 casing 2 input shaft 3 male rotor 4 female rotor 5 damper pulley 6 speed-increasing gear 22 speed-increasing pinion 23 female rotor timing gear 24 male rotor timing gear 25 speed-increasing device 27 oil supply passage 30 meshing portion 31 biting side valley 32 oiling nozzle

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hiroyuki Sugimoto 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Inside Mazda Co., Ltd. (58) Field surveyed (Int. Cl. ⁷ , DB name) F02B 33/36 F01M 9/10 F02B 1/08 F02B 39/14 F04C 18/16 F04C 29/02

Claims (1)

(57) [Claims] 1. An input shaft provided on one side in a casing and having a damper pulley fixed to an exposed end penetrating through the casing, and an input shaft provided on the other side in the casing meshing with each other to rotate the air from the side opposite to the input shaft by rotation. A male rotor and a female rotor that are sucked and compressed toward the input shaft side and discharged in a direction perpendicular to the shaft, a speed increasing gear fixed to the rotor side end of the input shaft, and a speed increasing gear fixed to the female rotor side shaft. A speed increasing pinion meshing with the high speed gear, a female rotor timing gear fixed to the boss of the speed increasing pinion, and a male rotor timing gear fixed to the male rotor side shaft and meshing with the female rotor timing gear. A lubricator for a supercharger,
An oil supply nozzle, which is connected to an oil supply passage provided in the casing and injects lubricating oil toward a disengagement side valley in an engagement portion between the female rotor timing gear and the female rotor timing gear, is provided. Lubricating device for Richolm type supercharger.