SU1516617A2 - Gear fluid machine - Google Patents

Abstract

The invention makes it possible to increase the volumetric and mechanical KPD. gear hydraulic machines. The angle α formed by the straight sections of gears passing through the geometric center of rotation, the extreme point of the side surface 9 of the elastic cuff and the edge of the inlet and outlet holes 12,13 from the side of the surface 9 are performed in a ratio T / 2≤α≤T - angular pitch gearing. The distance A between the extreme points of the holes 12,13 and the planes 14 passing through the centers of rotation 16, parallel to the center plane 11, passing through the geometric axes of the holes 12,13, the diameter is α holes 12,13 and the center-to-center distance is α are made according to the inequality 2A + DA. This embodiment provides a uniform pressing of the face compensators of the side surface of the gears. 2 Il.

Description

The invention relates to the field of mechanical engineering, in particular to gear hydromashich, and is an improvement of the known machine by author. W 1 | 63965.

The purpose of the invention is to increase the volumetric and mechanical efficiency.

Fig. 1 shows a gear hydromachine, a longitudinal section; figure 2 - section aa in figure 1.

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, and end compensators 6 with elastic cuffs 7 placed in figure grooves 8, while the lateral surface 9 of the end parts is elastic The cuffs 7 and the side surfaces associated with them 10 figured grooves 8 are made parallel to the central plane 11, passing through the geometrical axis of the inlet 12 and the outlet 13 holes. The angle o (formed by segments 1.A and 15 straight, passing through the geometric center 1b of rotation of each gear 3, the extreme point of the side surface 9 of the elastic cuff 7 and the edge of the inlet 12 and outlet 13 of the holes from the side of the side surface 9 of the elastic cuff 7 in accordance with the ratio t / 2 0 / tt, and the distance between the extreme points of the input 12 or output 13 holes and planes passing through the geometric centers 1b of rotation of the gears 3 parallel to the central plane 11, the diameter of the input 12 or output 13 holes TIFA and the intercentral distance is performed according to inequality

. 2a + d A, where t is the angular pitch of the toothed hook;

laziness;

a is the distance between the extreme point of the inlet 12 or outlet 13 and the plane passing through the center 1b of rotation of the gears 3 parallel to the center plane 11; d is the diameter of the inlet 12 or outlet 13; And - intercenter distance.

Gear hydromachine in pump mode works as follows.

d) Q

five

When the gears 3 rotate, the working fluid is trapped by the teeth of the gears 3 and in the interdental cavities is transferred from the low pressure cavity to the high pressure cavity. At the same time, the working fluid of high pressure enters the sub-cavity of the elastic cuff 7 and presses the end compensators 6 to the side surface of the gears 3. The angle between the 1C and 15 straight sections passing through the geometric center 1b of rotation of each gear 3, the extreme point of the side surface 9 elastic cuff 7 and the edge of the entrance 1 2 and exit 13 holes on the side of the side E of the elastic cuff 7 in accordance with the ratio t / 2 and the distance between the end points of the entrance 12 or outlet 13 holes and planes 1 passing through the geometric centers 1b of rotation of the gears 3 parallel to the center plane 11, the diameter of the input 12 or outlet 13 holes and the center distance, according to the inequality 2A + d And provides uniform compression of the end compensators 6 to the side surface gears 3 and, consequently, an increase in volumetric and mechanical efficiency. I

invention formula

Gear gidromashina on aut. St. N ° 1 + b39b5, characterized by the fact that. In order to increase the volumetric and mechanical efficiency, the angle o (formed by straight line segments passing through the geometric center of rotation of each gear, the extreme point of the side surface of the elastic cuff, and the edge of the inlet or outlet from the side surface of the elastic cuff, is in accordance with the ratio t / 2 i о (t, and the distance between the extreme points of the inlet and outlet orifices and the planes passing through the geometric centers of rotation of the gears parallel to the center plane passing through Res geometric axis of the input and output openings, the diameter of the input or output openings and the intercentral distance is performed according to inequality 2a + d A

t is the angular pitch of the gearing;

a is the distance between the extreme volume. which inlet or outlet

rotating through the center of rotation of the gears parallel to the central plane;

diameter of the inlet (outlet) hole; intercenter distance.

Claims (1)

Claim Gear hydraulic machine by auth. St. No. 1463965, characterized in that. in order to increase the volumetric and mechanical efficiency, the angle <K formed by the straight lines passing through the geometric center of rotation of each gear, the extreme point of the lateral surface of the elastic cuff and the edge of the inlet or outlet on the side of the lateral surface of the elastic cuff, is made in accordance with the ratio t / 2 έ cZ £ t, and the distance between the extreme points of the inlet and outlet and the planes passing through the geometric centers of rotation of the gears parallel to the central plane passing through h the geometric axis of the inlet and outlet, the diameter of the inlet or outlet and the center distance are made according to the inequality 2a + d> A 1516617 where t is the angular pitch of gearing; a is the distance between the extreme tomka of the inlet or outlet and the plane passing through the center of rotation of the gears parallel to the central plane; d is the diameter of the inlet (outlet) hole; A is the center distance. Figure 1