CS236360B1 - Connection for dosing and distribution of lubricating medium - Google Patents

Abstract

The solution concerns a connection for dosing and distributing lubricating medium, especially machine tools, allowing to minimize the supply of lubricating medium to lubricating points in an automatic cycle. The essence of the invention lies in the fact that the source (19) of the lubricating medium pressure is connected via the control valve (4) to the differential housing (21) of the distribution slide (1) by a line (20), and to the supply slides (2, 3) by a line (22), whereby the right half-space of the dosing slide (2) is connected to the left half-space of the differential housing (21) of the distribution slide (1) and the left half-space of the dosing slide (2) is connected by a line (13) to the right recess of the distribution slide housing (1), and where the left half-space of the dosing slide (3) is connected by a line (6) to the right half-space of the differential housing (21) and the right half-space of the dosing slide (3) is connected by a line (15) to the left recess of the distribution slide housing (1).

Description

BACKGROUND OF THE INVENTION The present invention relates to a circuit for dispensing and distributing lubricating medium, in particular machine tools, to minimize the supply of lubricating medium to the lubrication points in an automatic cycle, and to provide controllable delivery including signaling in the event of a malfunction.

Due to the variety of applications and requirements for lubrication circuits, a variety of device designs are known for this purpose, from the simplest, manually operated, spring-operated pistons, slide valves to expensive and complex electronic lubrication circuits and wiring.

Spring-type lubrication systems allow parameter control and reliability to a limited extent, depending on the design of the springs used.

The disadvantage of simple slide valves is that they do not allow the supply of very small quantities in a certain period of time, since at low adjusting speeds of the spool the stop occurs in the middle position of the slide and thus of the entire lubrication system. Another disadvantage is that it is completely clogged by a lubrication point

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238 360 system blocked thereby interrupted delivery to other lubrication points.

The drawbacks of the invention are based on the fact that the pressure source of the lubricating medium is connected via a control valve to the differential housing of the manifold via a control valve, and to the metering slide in the right half of the metering slide. with the left half-space of the differential slide housing and the left half-area of the metering slide connected to the right recess of the manifold housing, and wherein the left-half of the second metering slide is connected to the right half-space of the differential housing and the right half-space of the second metering slide bushings of the separating slide.

This solution considers the need for six lubrication points, but the present invention can be utilized for the needs of any number of lubrication points.

The connection according to the invention makes it possible to reliably and reliably ensure the supply of lubricating medium to the lubrication points, even in very small quantities, and, if a less significant lubrication point is clogged, it enables the lubricant to be supplied to other important points without interruption.

An exemplary embodiment of the connection for dispensing and distributing the lubricating medium according to the invention is shown schematically in the attached figure.

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The circuit according to the invention consists of three basic parts, a manifold 1 with a differential collar and a housing 21, and two metering valves,

An exemplary embodiment for dosing and distributing lubricant in this case for six lubrication points is based on the lubricant medium pressure source 19, which is connected via vision 20 via control valve 4 to distributor valve 1, dosing valves 2.2 e, differential switch 2.

The right half of the metering slide 2 is interconnected by conduit 12 with the left half of the differential housing 21 of the manifold 1. The left half of the metering slide 2 is interconnected by the line 15 3 with the right recess of the manifold housing 1. Similarly, the left-hand half-space of the metering spool 2 is guided by the line 6, connected to the right-hand half-space of the differential housing 21 of the spool 1.

• The right half-space of the metering slide 2 3® is connected via a line 15 to the left recess of the manifold housing 1 formed in such a way that when the transfer slide 1 is moved to the left extreme position, this half-space is connected to the outlet of the lubrication point M4. The left half-space of the distributor slide 1 is connected via a line Q to the recess of the housing of the metering slide 2 formed in such a way that when the metering slide 2 is moved to the left extreme position, this half-space is connected to the outlet of the lubrication point M5. when moved to the rightmost position, this half-space is connected via a line 22 to a pressure source 19 of the lubricating medium.

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Similarly, the right half-space of the spool 1 is connected via line 8 to the recess of the housing of the metering spool 2, so that when the metering spool 2 is moved to its extreme positions, either the M6 _f or the line 22 is connected.

Nejpouzdrech metering valves 2 and 2 are formed of the grooves 14.2 lines connected ^{to the} distributor slide valve is formed to connect with the right half-space metering slide «^ respectively, with the left half space metering slide 2 when the metering spool 2 moves to the left limit position and a metering slide 2 at the rightmost position. The outlets of the lubrication points M2 and connecting the right or left half-space of the differential sleeve 21 are connected to each other by the line 10 when the distributor slide 1 is moved.

• which is equipped with a nozzle 1.6.

In the lubrication circuit thus formed, the lubrication medium proceeds from the pressure source 19 via the control valve 4 via a line 20 to the distributor slide 1, the metering slide 2,2 and the differential switch 2 which is set so that the lower pressure signal value is lower than the lowest media 'is necessary for flawless function of insertion.

When describing the function we assume the basic initial position of the sliders 1,2. and 2 ⁱⁿ the rightmost position. In this case, the pressure medium passes through the line 20 through the distributor slide 1 to the line 12, moves the metering slide 2 to the left end position, and the medium from the left half-space of the metering slide with line 15 is fed to the lubrication point M1. When the metering slide 2 reaches the left end position, it is connected to the line

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12, in which there is still a pressure medium, a conduit 14 and, via a manifold slide 1, a conduit 15 which supplies the pressure medium d of the right half-space of the dispensing spool 2 which begins to move to the leftmost position. Thus, from the right-hand half-space of the metering slide 2 ^s ®, the lubricant medium is conveyed via lines 6, 10 to the lubrication point M2. By moving the metering slide 2 ^{, the} pressure medium is transferred via line 8 to the right half space of the dispensing slide 1, that is moving to the left, the medium from the left half space of this dispensing slide 1 with line 2 ^{and beyond the} middle position Mg and M5.

By moving the distributor slide 1 to the left, the pressure medium source 19 is connected via line 6 to the left half-space of the metering slide 2, this moves to the right and the dose from the right half-space moves through the line 15 to the lubrication point M4. By moving the metering slide to the right, a pressure medium source 19 is connected to the left half-space of the metering slide 2 via lines 6, 2 ^and 18, this moves to the right and the dose from the right half-chamber of this slide is moved to line M5. By moving the metering slide 2 to the right, the pressure medium source 19 is connected via line 9 to the left half-space of the dispensing slide 1, which is transported, conveying a dose of lubricating medium from the right half-space via line 8 to the lubrication point M6. dose from the right half-space of the differential housing 21 to the lubrication point M2, thereby closing the cycle.

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For very little lubrication medium supply to the lubrication points within a certain time interval, the distributor slide 1 runs very slowly. The stop of the diverting slide 1 in the middle position, as is the case with conventional slide valves, is prevented by the differential collar 25 of the diverting slide 1, the width of which is equal to the width of the groove 24 of the differential sleeve 21. passing through the middle position of the distributor slide 1 to the second extreme position.

If one of the less important lubrication points that is connected by lines 10 and 11 is clogged, the device works as follows. When the outlet is brought to the lubrication point M5 by moving the spool 1 to the left, M5. but it must be pushed through the hydraulic resistance into the lubrication point M6. The lubrication cycle continues, only the pressure increase on this resistor is registered on the differential pressure switch 2, whose upper switching value is set to this pressure.

In case of clogging of important lubrication points, which in this particular case M1.M4 leads to machine damage, the lubrication cycle stops due to resistance, the pressure rises above the upper limit of the differential pressure switch 2, which in this case gives a permanent impulse to registration of this state.

Claims (7)

SUBJECT OF THE INVENTION 236 360 Wiring for dosing and distributing lubricant, in particular for machine tools, characterized in that the lubricant medium pressure source (19) is connected via a control valve (4) to a differential bushing (21) of the manifold via line (20). and, on the other hand, by a guide (22) to the metering slide (2,3), wherein the right half-space of the metering slide (2) is connected to the left half-space of the differential housing (21) of the distributor slide (1); (13) with a right groove of the manifold housing (1), and wherein the left half-space of the metering spool (3) is connected by a guide (6) and the right half-space of the differential housing (21) and the right half-space of the metering slide with left recess of the manifold housing (1). 2. Lubrication medium distribution and distribution system according to claim 1, characterized in that the space under the right recess of the manifold housing (1) is connected to the outlet of the lubrication point (M1) and the space of the lubrication point (M1). under the left recess of the divider slide housing (1), in the case of moving the slide valve to the leftmost position, it is connected to the outlet of the lubrication point (M4). - 8 238 380 3. The lubrication medium distribution and distribution arrangement according to claim 1, characterized in that in the case of displacement of the metering slide (2) to the leftmost position, the left half-space of the metering slide (1) is connected to the groove of the metering slide housing. 2) and with the outlet of the lubrication point (&>) and if the metering slide (2) is moved to the rightmost position, this half-space is connected by a line (22) to the lubricating medium pressure source (19). 1) with a metering slide (3) and a lubrication point (M6). 4. Connection for dispensing and distributing the lubricating medium according to claim 3, characterized in that the outlets to the lubricating points (M3, M6) are connected by a line in which the nozzle (17) is arranged. 5. Connecting přodávkování and distributing lubricant ^from me dia according to claim 1, characterized in that the conduit / 20 / ME ^from pressurized lubricating dia is assigned to the differential pressure switch / 5 /. 6. The lubricant dosing and distribution circuit according to claim 1, wherein the outlets of the lubricating points (15, 12, 12) are alternately connected to the left or right half-space of the differential housing (21) of the manifold (1). 7 · Connection for dosing and distributing the lubricant Me ^DIA according to claim 6, characterized in that the lubrication points · terminals 4i2, M5 / are connected to a duct which is provided with the nozzle / 16 /.