CS242686B1 - Circulation lubrication system of gear pump - Google Patents

Abstract

The lubrication system of the submersible pump is designed for gear pumps for transporting viscous liquids or substances with lubricating ability for both directions of rotation. The circulating lubrication system is designed in such a way that individual pairs of lubricating grooves, vertical and longitudinal drilled channels and relief chambers in the area of gear engagement are interconnected, while the simple circulating lubrication system thus created is located in the pump body. Gear pumps with a circulating lubrication system can be used in all branches of industry where a substance with β lubricating ability is transported.

Description

The invention relates to a gear pump circulating lubrication system for conveying viscous liquids or substances having lubricating properties for both directions of rotation.

In known designs, the gear pump lubrication system is designed for only one direction of rotation.

One known solution where the gear pump bearings are lubricated uses a complex lubrication system that has tubes for the lubricating medium outside the gear pump body itself, causing frequent failures especially in heavier operations where pressure pipes are bent or even punctured for lubricating medium.

Another known solution is for contaminated viscous fluids and therefore a filter is placed in the lubrication circuit, from which the lubricating medium is distributed through the channel system in a complicated and laborious way. The softening chambers for excess lubricating medium are located at the ends of the cogwheels. are guided obliquely through the pin to the lubrication groove. This solution is also only for one rotation direction. The bearing arrangement of the gear journals relative to the relief chambers at their ends is partially unstable and the lower gear must be secured against lateral displacement relative to the upper gear.

The above-mentioned drawbacks are eliminated by the gear pump lubrication system according to the invention, characterized in that at least one pair of opposed lubricating grooves are formed in each of the gear journals parallel to its longitudinal axis and into which the lubricating medium is fed or drained according to the direction of rotation of the gear pump through an appropriate channel whose axis is perpendicular to the longitudinal axis of the gear journals, two opposing channels lying on a common axis are connected by a channel whose axis is perpendicular to the axis of the two opposite channels and opens into the relief chambers located in the engagement area of the gear pump gears · The lubrication grooves are terminated on both sides at a = b = 0.1 d · k

The gear pump circulating lubrication system thus designed reliably lubricates the sliding gear journals, using a simple and low-maintenance, self-lubricating lubrication system, universally suitable for both left and right-hand rotary versions of the pump, including the reverse version.

In the accompanying drawings, a gear pump lubrication system according to the invention is shown, in which Fig. 1 is a front view in partial sections BB, CC, DD, of a gear pump with sectional view AA, and Fig. 2 is a side view in section AA of a gearwheel. pump with rows BB, CC, DD,

In the molded housings 21,22,23.24 slidingly mounted are the pins 26.27 of the gears 251,252 whose lubrication is ensured by the conveyed viscous fluid supplied by the respective bore channels inside the pump casing. And from there, through the gaps in the toothed wheels 251.252, it is transferred to the pressure side marked with the letter V. From there, via the relief chambers 28,29, the channels 1.2,3.4.5 are further led to the lubrication grooves 11.12.16.17 of the bushings 21.2. For the direction of rotation indicated by the letter I, the excess viscous liquid is collected in opposed lubrication grooves 13,14.15,18 and is sucked into the relief chambers 30.31 in the suction chamber marked _S_channels 6.7.8,9,10 and returned to the circulation ·

In reverse operation of the gear pump indicated by the letter II, the same operation of the lubrication system occurs, but in FIG

242 686 in a valuable way. The space indicated by the letter JV_ will be changed to the suction space and the space marked by the letter S to the pressure space from which the liquid is pushed by the relief chambers 30,31 through the channels 6, 7,8, 9,1Ο to the lubrication grooves 13,14.15,18 of the bushings 21,22, 23.24. The liquid that passed through the .21, 22, 23, 24 capsules. The sprockets 26.27 of the gears 251.252 are again sucked into circulation by openings in the opposing lubrication grooves 11, 12, 17, and guided through the channels 1,2,3,4, 5 into the relief chambers 28.29.

To prevent increased leakage of lubricating fluid outside the bushings 21,22,23,24, the lubricating grooves 11, 12, 13, 14, 15, 16, 17 terminate on both sides at a = b = 0.1 d, where :

a - distance between the end of the lubrication groove and the end of the bushing b - distance between the end of the lubrication groove and the gear d - diameter of the pinion

Gear pumps with a circulating lubrication system according to the invention can be advantageously used wherever a viscous liquid or a substance with lubricating ability for both directions of rotation is conveyed. eg in petrochemistry, for the transport of oils and various lubricants.

Claims (2)

SUBJECT OF THE INVENTION 1. Gear pump circulating lubrication system for transporting viscosity fluids or substances β lubricating capability of rotation direction, consisting of lubrication grooves, relief chambers and ducts, characterized in that in each housing, ¢ 21,22,23,24 ) at least one pair of opposed lubrication grooves (11, 13) and (12,14) and (15,16) and (17,18) are provided for the inlet and outlet of the first and second toothed journals (291,232) lubricating medium according to the direction of rotation of the gear pump, in the body of which are formed on the one hand pairs of opposite first channels (2,7) and (3,6) and (4,8) and (5,9), whose axes are perpendicular to the longitudinal axis of the bushes (21,22,23,24) and second channels (1,10), whose axes are parallel to the longitudinal axis of the bushings (21,22,23,24) and which connect the corresponding pair of opposing first channels (2,7) ) and (3,6) and (4,8) and (3,9) on a common axis and open into the relief chambers (28,29,30,31) formed in the tooth engagement area gear wheels (251,252) · 2. The gear pump circulation lubrication system according to claim 1 _, wherein the lubrication grooves (11, 12, 13, 14, 15, 16, 17, 18) terminate at a distance (a) from the ends of the housings (21, 22, 22, 22). 23.24) and at a distance (b) from the toothed wheels (251,252), wherein a = b = 0.1d, where a is the end of the lubrication groove from the end of the bushing b -the distance of the lubrication groove end from the gear d-diameter of the gear pin.