SU1671972A1 - Pinion hydraulic machine - Google Patents

Abstract

The invention relates to mechanical engineering, in particular to gear hydraulic machines, and can be used in hydraulic systems for various purposes. The purpose of the invention is to improve the starting characteristics, increase reliability and durability. Gear hydromachine comprises body 1, in cylindrical bores 2 of which gears 3 of external gearing are placed with pins 4 mounted in bearings / P / 5 of sliding, on outer radial surface 6 of which annular cavities / KP / 7 are made, connected by channels / K / 8 s inner radial surface / VRP / 9 P 5 and compensators 10 end gaps with elastic cuffs 11, and P 5 are matched to each other along flat surfaces / PP / 12, one of K 8 in each P 5 is perpendicular to its PP 12, and on GRP 9 P 5 lubricants are made Anavi / CM / 13 and 14 of different volume, connected to K 8 with KP 7, while K 8 connecting SM 14 of a smaller volume with KP 7 are also made perpendicular to PP 12 P 5. 3 Il.

Description

The invention relates to mechanical engineering, and in particular to gear hydraulic machines.

The purpose of the invention is to improve the starting characteristics, increase reliability and durability.

Figure 1 shows a longitudinal section of a gear hydraulic machine with straight lubricant grooves; Fig. 2 shows a sliding bearing with straight lubrication grooves; Fig. 3 shows a sliding bearing with a screw lubricating groove.

The gear hydromachine comprises a housing 1, in cylindrical bores 2 of which gears 3 of external engagement are located with trunnions 4. mounted in sliding bearings 5, on the outer radial surface 6 of which annular cavities 7 are made.

channels 8 with the radial surface 9 of the bearings 5 and the compensators 10 of the end gaps with elastic cuffs 1i, the slide bearings are coupled to each other along flat surfaces 12, one of the channels 8 in each bearing 5 is perpendicular to its flat surface 12. a On the inner radial surface 9 of the sliding bearings 5, lubricant grooves of different sizes 13 and 14 are connected, connected by radial channels 8 to an annular cavity 7, while radial channel 8 connecting the lubricating groove 14 (less The connectors have an annular cavity 7, are also made perpendicular to the flat surface 12 of the sliding bearings 5, and the lubricating grooves 13 can be made screw.

ABOUT

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Gear hydromachine mode in the engine works as follows. When high pressure working fluid is supplied to the high pressure cavity, it acts on the lateral surfaces of the teeth of gears 3, creates a torque, under the action of which gears 3 turn, performed useful work. At the same time, the working fluid under pressure enters the pressure chambers of the elastic cups 11, pressing the compensators 10 to the ends of the gears 3, and through the technological gaps for lubricating the trunnions 4 of the gears 3 fill all the existing hydraulic machine cavities, including annular cavities 7, radial channels 8 and lubricating grooves 13 and 14. When the hydraulic engine is stopped, the supply of working fluid from the pump is turned off and the lubricant layer from the bearings 5 is displaced due to the inertia of movement of the drive unit. However, the subsequent start of the hydraulic engine in friction pairs The journal 4 - bearing 5 retains the oil on the film, which is necessary for initial lubrication, which is provided by the fluid in the annular cavities 7, and in the process of rotation an oil wedge is created and the effect of oil starvation is eliminated.

Claims (1)

Invention Formula 1 Gear hydraulic machine containing body in cylindrical bores of which external gears are placed meshing with trunnions mounted in bearings, on the outer radial surface of which are made annular cavities connected by channels with internal radial surface bearings, and face gap compensators with elastic cuffs, the sliding bearings being coupled to each other along flat surfaces, one of the channels in each bearing is made perpendicular to its flat surface, characterized in that, in order to improve the starting characteristics, increase reliability and durability, lubrication grooves of different volume and configuration, connected by radial channels with an annular cavity, are made on the inner radial surface of the sliding bearings. 2 Hydraulic machine pop. 1, characterized in that the radial channel connecting the lubricant groove of a smaller volume with the annular cavity is made perpendicular to the flat surface of the sliding bearings. 5 10, eleven eight FIG. 2 7/5 9 P P