CS215796B1 - gear pump - Google Patents

Abstract

The invention falls into the field of positive displacement pumps and solves the problem of reducing the labor, noise, friction and material consumption of the pump. It relates to a gear pump, where two gears are mounted in the housing and its essence is that the driven gear is provided with opposite recesses on both front surfaces and opposite identical recesses on the inner surfaces of the housing, while steel balls are loosely mounted in the recesses of the gear.

Description

1 215 706

The invention relates to a gear pump, in particular to its driven wheel. At the same time, the gear pumps which are produced consist of a housing in which the two gear wheels are broken in the shape of the two penetrating cylindrical sleeves so that the drive wheel is mounted on the shaft assembly while the driven wheel is mounted on the pivot pin. The two gears rotate in an unambiguous direction of rotation and engage the pumped liquid into the dental gaps, which it transfers around its periphery, where the dental gap forms, together with the cylindrical surface of the cavity, the pump casing, into the discharge part of the pump. The drive wheel shaft as well as the driven wheel pin are housed in sliding bearings lubricated by the transport fluid. The disadvantage of the present designs is the high precision of the drive wheel bearing relative to the wheel, particularly in terms of centering, since even a small deviation from the parallel shaft and the pin of the gears results in great wear on the tooth flanks of both wheels, thereby reducing the efficiency and life of the pump by that the friction of the functional surfaces of both the gears and the teeth of the two wheels increases. The labor of producing such gear pumps is high. The above drawbacks and drawbacks are substantially eliminated by the invention, which is a gear pump consisting of a split housing having a cavity of two intersecting cylindrical surfaces and, on the other hand, a suction channel and a discharge channel, and two gear wheels mounted rotatably in the pump cavity, the wheel is mounted on the drive shaft mounted in the plain bearings and provided with a gland at its outlet from the pump housing.

It is an object of the invention that the driven gear is provided with opposed recesses on both end faces, and that the fixed shield and the removable shield are provided with oppositely identical recesses on their inner surfaces, with loose steel balls in the recesses of the driven gear.

It is a further object of the invention that the recess is in the form of a cylindrical surface on which the conical surface is connected, or the recess is in the form of a cylindrical surface or a spherical surface. It is a further object of the invention that the recess is provided with a cage with corresponding sliding surfaces. It is an object of the invention that the driven gear is provided with an axial bore, and finally, the cages are provided with lubrication channels and grooves.

The higher effect of the invention is manifested by a considerable reduction in labor, reduced noise and reduced consumption of quality material. Further, the new drive wheel mounting allows for the self-infeeding wheel with respect to the drive wheel. Finally, the new drive wheel bearing design significantly reduces friction. An example of a particular embodiment of a gear pump according to the invention is shown schematically in the accompanying drawings, wherein Fig. 1 is an axial section view of a gear pump with a paid invention, Fig. 2 is a sectional view of the gear pump of Fig. 1 in the plane A - A and Figs. illustrates details of alternative embodiments of the drive gear of the pump of FIG. 1

According to the invention, the gear pump is formed by a body 1 provided with a cavity 2 in the form of two penetrating cylindrical surfaces. The body 1 is provided with labels on both sides where the shield 2 is provided at the point of passage of the drive shaft 2 with a plug 6 and a gland lid. The outer removable shield 6 is connected to the body 1 and the fixed shield 2 by means of bolts 8, with its

Claims (7)

The correct position with respect to the pump body 1 and the fixed shield 2 provides a centering pin. 2 A gear wheel 11 is engaged on the drive shaft 2 housed in both shields 4, 2 in the plain bearings 10, which engages the driven gear 12. Drive the gear 11 is mounted in one cylindrical cavity 2 of the pump body 1, while the driven gear 12 is received in the second cylindrical portion of the cavity 2 of the pump body 2. The driven gear 12 is provided with a bore 12 in its axis, which passes towards the outer faces of the driven gear 12, in the basic embodiment shown in FIG. 1, into two opposite, mutually mirror-like conical recesses 14 passing towards the outer faces of the driven gear. 12 in cylindrical shape. Corresponding recesses 14 are provided in the rigid screen 2 and the removable shield 4 so as to close the recess 14 of the driven gear 12. The supporting element of the rotational support of the driven gear 12 is formed by a pair of spheres 15 housed in recesses 14 on both sides of the driven gear 12. A spherical ball 16 can be inserted into the bore 13 by the supporting steel balls 15. Such a supporting element of the rotatable bearing of the driven gear 12 replaces the rotating constructions, allows self-centering of the two gears 11, 12, and reduces the frictional surface and thus the friction itself. significantly reduces the accuracy of execution. 3 to 6, embodiments are shown in which the recess 14 in the driven gear 12 and in the two shields 24 is cylindrical, as in the case of the embodiment of FIGS. 6. In these cases, the balls 15 are housed in cages 17 provided with sliding surfaces 18. The cages 16 of the cylindrical embodiment are provided with channels 19 connected to the axial bore 13 of the driven gear 12 so as to allow the entry of lubricating fluid into the friction surfaces of the steel balls on the one hand, they help to align the axial pressure on both sides of the pump body 1. OBJECT OF THE INVENTION A gear pump, comprising a body provided with a cavity of two penetrating cylindrical surfaces, and a fixed shield and a removable shield connected to the body and a fixed pump shield by bolts, where the pinion gears are pivotally mounted in the cavity of the pump body. wherein the drive gear is supported in the plain bearings on the drive shaft, sealed at the exit of the fixed shield by the gland and the gland, characterized in that the driven gear (12) is provided with opposed recesses (14) on both faces and a fixed shield ( 3) and the removable shield (4) are provided on their inner surfaces with opposite identical recesses (14), loosely steel balls (15) being accommodated in the recesses (14) of the driven gear (12) and both shields (3,4). 3 15 796 2. Cogwheels to the pump according to claim 1, characterized by a conical surface. in that the recess (14) of my shape is cylindrical ; 3. A gear pump according to claim 1, wherein the recess (14) is in the shape of a cylindrical surface, Gear pump according to claim 1, characterized in that the recess (14) has a spherical surface shape, 1 Gear pump according to Claims 1 to 4, characterized in that the recess (14) is provided with a cage (17) and corresponding sliding surfaces (18). 6. Gear pump according to claim 1, characterized in that the driven gear (12) is provided with an axial bore (13). The gear pump of clauses 1 to 6, characterized in that the cages (17) are provided with lubricating channels (19) and grooves. 2 drawings