SU1652683A1 - Devices of displacement machine - Google Patents

Abstract

The invention relates to a downstream engineering. The aim of the invention is to increase efficiency. The device contains a cylinder 1, located in the piston 2 with a seal 3 and a driving rod 4 with the formation in the cylinder 1 of the working cavity 5 having suction and discharge valves 6 and 7. On the rod 4 there is mounted a disk 9 spring-loaded 8 from the side of the rod 9 relative to the piston 2 and with the formation between them of the chamber 10 of variable volume. The piston 2 has a channel in the form of a throttle flow hole 11c installed in it from the side of the working cavity 5 with a normally closed non-return valve 12. The variable volume chamber 10 is additionally communicated with the working cavity 5 by means of an additional throttle flow hole 13 in the piston 2, the cross section of which smaller cross-section of the throttle hole 11. The disk 9 has a seal 14. 1 sludge.

Description

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The invention relates to a downstream engineering.

The aim of the invention is to increase operating efficiency by reducing the opening delay of the suction valve and smoothly increasing the pressure in the variable volume chamber during injection.

SRI.

The drawing shows a schematic diagram of a cylinder-piston device for a volumetric machine.

The cylinder-piston device of the volumetric machine comprises a cylinder 1, located in the last piston 2 with a seal 3 and a driving shock 4 with formation in the cylinder 1 of the working cavity 5 having suction and discharge valves 6 and 7. A spring-loaded spring 18 is mounted on the rod 4 on the last side 9 with the possibility of its movement relative to the piston 2 and with the formation of a variable volume chamber 10 between them. In the piston 2 there is a channel in the form of a throttle flow hole 11c installed in it from the side of the working cavity 5 but mally closed check valve 12.

The variable volume chamber 10 is additionally communicated with the working field 5 by means of an additional throttle flow hole 13 in the piston 2, the cross section of which is smaller than the cross section of the first throttle hole 11. The disk 9 has a seal 14 and a stop is mounted between the piston 2 and the disk 9 15.

The cylinder piston device of the volumetric machine operates as follows.

When the piston 2 is in the extreme left position, the pressure in the working cavity 5 is equal to the discharge pressure. The pressure in the variable volume chamber 10 may be equal to or slightly lower than the pressure in the working cavity 5.

The spring 8 is in the compressed position. After starting the movement of the piston 2 with the stem 4 to the right, the discharge valve

7 closes and the pressure in the working cavity 5 decreases sharply. With a decrease in pressure in the working cavity 5 below the pressure in the chamber 10 of variable volume, the liquid from the latter under the action of a compressed spring

8 through the additional throttle hole 13 and simultaneously through the throttle hole 11 when the check valve 12 opens, it begins to flow into

working cavity 5. At the same time, the suction valve 6 opens and fluid flows through the latter into the working cavity 5. After

When the disk 9 interacts with the stop 15, the change in the volume of the chamber 10 stops and the relative equalization of pressures in the working cavity 5 and the chamber 10 of variable volume occurs.

When moving the piston 2 together

with the stem 4 to the left, the suction valve 6 closes, the pressure in the working cavity 5 increases, causing fluid to flow through the additional throttle orifice 13 and a gradual increase in pressure on the variable volume chamber 10. At the same time, the disk 9 moves and the spring 8 is compressed, and the discharge valve opens 7 and extrusion

fluid to be consumed

The piston with two throttles of g / and 11 and 13, the first of which has a check valve 12, and the second - the cross-sectional area smaller

the cross-sectional area of the orifice 11. reduces the lag time of the suction valve and smoothly increases the pressure in variable pressure cylinder 10 when the JHHH fluid is injected.

Claims (1)

Invention Formula The cylinder-piston device of the volumetric machine contains a cylinder, located in the last piston with a seal and a drive rod with the formation of a working cavity in the cylinder and a spring-loaded disk mounted on the rod with the possibility of its movement relative to the piston and forming a variable volume chamber between them. The third in the piston is a channel with a normally closed non-return valve installed on the side of the working cavity, characterized in that, in order to increase the efficiency of work by reducing the delay in opening the suction valve and smoothly increasing the pressure in the variable volume chamber when Hdi is not fouled, the disk is spring-loaded relative to the rod, the channel in the piston is designed as the throttle flow orifice, the variable volume chamber is additionally communicated with the working cavity by means of an additional throttle flow orifice made in the piston, the cross section of which is smaller than the cross section of the first throttle body and the disc is provided with a seal.