SU815421A1 - Pulse-type feeder - Google Patents

Description

(54) PULSE FEEDER

The invention relates to the design of pulse feeders for supplying a metered quantity of lubricant to the sliding surfaces of machines and mechanisms and can be applied in the lubrication systems of machine tools, press-pressing equipment and other machines and mechanisms. A feeder is known, containing a poriun metering body, the rod cavity of which is permanently connected to the injection line, and the piston cavity is connected to the cavity in which the spring-loaded cylindrical slide is inserted, connecting the piston cavity alternately to the injection line or to the consumer line} is: a relatively small dosing accuracy of the lubricant, due to the fact that the valve of the feeder when you move to the left extreme position you additionally gives the consumer a portion of the lubricant. and when moving to the right extreme position, a part of the lubricant is sucked from the consumer line or from the cavity of the metering piston, i.e. an eolotnik with CBoitx movements introduces an error in the accuracy of the dose given; relatively large dimensions of the irrational arrangement of the metering piston and the spool in the housing; reliability in the presence of a check valve after the feeder installed, for example, to protect the lubricating system from gas penetration, T wine pressure, etc., since mixing the spool to the right extreme position in this case is difficult due to the increased discharge on the left side of the spool. The purpose of the invention is to increase the metering accuracy and reduce the size. This goal is achieved by the fact that the feeder, comprising a housing, a metering piston, the rod cavity of which is permanently connected to the injection line, and the piston cavity is connected to the cavity in which the spring-loaded valve is located, which connects the piston cavity alternately to the pressure line or consumer line , is equipped with a spring-loaded sealing piston, an axial channel is made in the spool, one end of the spool is in communication with the atmosphere, while the metering and sealing pistons are installed in the axial channel of the spool, and The lotus singing piston is installed on the side of the end communicated with the atmosphere. A spool with an axial channel, in which metering and sealing pistons of equal diameter are installed in combination with the annular end of the solonik on the sealing piston side with the atmosphere, eliminates the negative effect of the spool movement on the metering accuracy and reduces the feed size. , general view in section. The proposed feeder comprises a housing 1 with holes 2 and 3 suitable for supplying and discharging a lubricant, metering a piston in the form of a cuff 4 on the rod 5, a spool 6 spring 7, sealing the piston in the form of a cuff 8 on the rod 9, fitting 10, adjusting nut 11, retaining ring 12, locking ring 13, rubber ring 14, rubber ring 15. The spool 6 has an axial channel separated by a jumper 16 with a hole 17 serving as a stop for the spring 7. In the channel of the spool 6 there is a metering piston installed with one pillar 4, and on the other - spring 7 and seal Piston 8. Spring 7 at one end IIpaet in jumper 16 of spool 6 and the other into piston rod 9 8. Rod 9 is fixed in the housing to feed a rotary ring 13. The ring end of spool 6 on the side of the sealing piston 8 is connected to the atmosphere with the help of Installing rod 9 of housing I with a gap (not shown in the drawing). Dosing and sealing pores do not have the same diameter. The axial channel of the spool 6 is connected by holes 18 and 19 with the outer cylindrical surface of the spool 6. When the spool has 1 shafts under the influence of spring 7 in the extreme right position, version 18 connects the piston cavity 0 of the metering piston 4 with an orifice . When the spool 6 is positioned (under the effect of pressure force on the right end face of the spool), the extreme 19 position of the opening 19 through the circular opening on the spool 6 and the anal 21 connects the piston cavity 0 of the metering piston 4 to the opening 2, i.e. with injection line. The rod end of the pipe 4 and the right annular end of the spool 6 through the channels 22 and 23 in the housing are permanently connected to the injection line. The feeder operates as follows by the occurrence of pressure in the discharge line. The lubricant flows under the right annular end of the spool 6 and into the rod cavity of the piston 4, while the spool under the action of the strong spring 7 remains in the extreme right position and the piston 4 begins to move to the left position, issuing a dose of lubricant through openings 17, 18 and 3 in line to the consumer. When the piston 4 reaches the leftmost position, the pressure in the rod cavity increases, as a result of which the spool 6, overcoming the force of the spring 7, comes to the extreme left position, connecting the two cavities of the piston 4 to the pressure line. Due to the difference in areas under pressure, the piston begins to move in the opposite direction (charging of the feeder occurs), and the lubricant displaced from the rod end flows together with the lubricant supplied from the injection line to the piston cavity. With a pressure drop in the discharge line, the spool 6 under the action of the spring 7 moves to the right extreme position, connecting the piston cavity of the piston 4 to the consumer line. With repeated occurrence of pressure in the discharge line, the operation cycle of the feeder is repeated. Due to the fact that the left annular end of the spool 6 is connected with the atmosphere, the pistons 4 and 8 are made of the same diameter and their piston cavities are connected by an aperture 17. When the spool 6 moves to the extreme right or left position, it does not produce an injection (optional to the metering piston) or the suction action in the consumer line and thus does not introduce an error in the accuracy of the dispensed dose. in addition, it provides the ability to install, in necessary cases, behind the I feeder, a check valve in order to protect it, for example, from penetrating gases, temperature effects, etc. Adjusting the stroke of the piston 4, and together with this, and the delivered dose (Lubricant). the material is made by turning the adjusting nut 11, which through the interaction of its end face with the stop in the form of a ring t2 on the rod 5 of the upper piston 4 determines the stroke of the latter. In some cases, with small strokes commensurate with the stroke of the spool 6, the piston 4 can you Od from the axial channel of the spool 6, for example, when the spool moves to the extreme left position, or when the spool moves, the extreme right position. However, this does not reflect on the work of the dosing piston (and feeder), since the difference of its areas under pressure The use of the invention will significantly increase the accuracy of dosing of the feeder, expanding the scope of its application.

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Claims (1)

1 The invention The pulse feeder, comprising a housing, a metering piston, the rod cavity of which is permanently connected to the injection line, and the piston cavity is connected by a channel to the cavity in which the spring-loaded spool is located, which connects the piston cavity alternately to the injection line or the consumer line, tl and h and y. IH to and with the fact that, in order to improve metering accuracy and reduce dimensions, the feeder is equipped with a spring-loaded sealing piston, an axial channel is made in the spool, one end of the spool is in communication with the atmosphere, and the metering and the flap are installed in the axial channel a spool, the sealing piston being installed on the side of the end communicated with the atmosphere. Sources, information taken into account in the examination of I. USSR author's certificate Mi 485273, cl. F 16 N 27 / OO, 1964.