SU1537948A1 - Metering device - Google Patents

Abstract

The invention can be used in lubrication systems for machine tools and other equipment. The dispenser allows to increase the reliability of work by excluding from the design of moving elements. The dispenser includes a housing with a bore communicated with the inlet and outlet channels, in which a spring-loaded batch feed device is installed, including a metering piston, a batch feed device with a piston in the form of an elastic sealing ring installed between the housing and the movable bushing with radial movement in the chamber, the supply is connected to the receiving cavity of the chamber through the valve, spring-loaded relative to the housing in the axial channel of the sleeve, and the channel of the outlet is connected to the metering cavity of the cameras s. 1 il.

Description

The invention relates to metering devices and can be used in lubricating systems of metal-cutting equipment.

The aim of the invention is to improve the reliability of an exception to the design of moving elements that are in rigid mechanical interaction.

 The drawing shows a constructive scheme of the dispenser.

The dispenser consists of a housing 1, a case cover 2, locking a cylindrical bore 3, in which between the movable sleeve 4 and the case cover 2 in the chamber 5 there is a dispensing piston 6 in the form of an elastic sealing ring. The supply channel 7 is connected to the receiving cavity 8 of the chamber 5 through the valve 9 with a spring

10, mounted in the axial channel 11 of the movable sleeve 4. The discharge channel 12 is connected to the metering cavity 13 of the chamber 5 by an annular gap 14.

The dispenser works as follows.

In the initial position, the sleeve 4 is located in the lower position with an emphasis on the housing 1. The dosing piston 6 is in a TZ free state, forming an end gap a in the chamber 5. The receiving cavity 8 of the chamber 5 is cut off from the supply channel 7 by the valve 9 and connected by a gap and to the metering cavity 13 of the chamber 5.

With increasing pressure in the supply line, to which the metering device connects the supply channel 7, pressure rises under the end face of the movable sleeve 4. Sleeve 4, overcoming force

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The spring 10 moves upward against the stop into the cover 2. At the same time, the gap a is eliminated, and then the partial deformation of the metering piston 6 in the chamber 5 is hermetically cut off the metering cavity 13 of the chamber 5 from its receiving part 8. After the movable sleeve 4 stops from overpressure in the channel

With the supply, the pressure in the axial channel 11 of the sleeve 4 rises. After the spring force 10 is overcome, the valve 9 opens and the oil enters the receiving cavity 8. Overcoming the thrusting forces of the metering piston 6 and the back pressure in the discharge channel 12, the oil causes the dosing porn 6 to move in the radial the direction in the chamber 5. During this movement, the oil from the metering cavity 13 is displaced by the piston 6 along the annular gap 14 into the drain channel 12 to the lubricant of the consumer.

At the end of its radial movement, the metering piston 6 abuts against the housing 1. Oil displacement is stopped, and the lubricant dose is equal to the volume of incoming oil into the chamber 5.

When the pressure in the supply line decreases, the pressure in the supply channel 7 and in the axial channel 11 of the sleeve 4 decreases. At the same time, valve 9, compartment receiving chamber 8 of chamber 5 from supply channel 7 is closed. After that, under the action of the force of the spring 10, the movable sleeve 4 returns to the lower position against the stop into the housing 1. During this movement, the metering piston 6 is freed from the efforts that deform its shape,

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and due to the elastic forces it takes its initial position in the chamber 5, in which the dispensing cavity 13 communicates with the receiving cavity 8 over the formed gap a and the dispensing cavity 13. The previously received oil from the receiving cavity 8 enters the dispensing cavity 13. The cycle of the dispenser's operation ends and resumes at the next increase in pressure in the supply line.

Claims (1)

Invention Formula A dispenser comprising a housing with a bore and channels for supplying and discharging lubricant, a batch feed device located in the bore of the housing with a metering piston, receiving and metering cavities connected to the supply and drain channels, respectively, a check valve located between the supply channel and the receiving cavity and spring-loaded with respect to the housing, characterized in that, in order to increase reliability, the batch feed device is made in the form of a movable sleeve with an axial channel installed to form chamber in the bore, the metering piston is formed as an elastic ring mounted in the chamber between the sleeve and. a housing with the possibility of radial movement; in this case, a shutoff valve is installed in the axial channel of the sleeve, and the receiving and metering cavities are formed by separating the chamber with an elastic ring. 12