SU1263952A2 - Device for filling liquid to end face seal of apparatus - Google Patents

Abstract

THE DEVICE FOR - SUPPLEMENT BY LIQUID OF MECHANICAL SEAL OF THE DEVICE according to the author. St. No. 1113618, characterized in that, in order to increase reliability, the separating element of the accumulator is made in the form of a cylinder with a piston, the rod of which is provided with a supporting disc, the cylinder being located coaxially to the walls of the accumulator and an annular abutment is made on its outer surface, and the elastic element is located between the annular an anvil and a supporting disk, wherein the device is equipped with a pressure sensor, the inputs of which are communicated with. cavities of greater and lesser pressure of the accumulator, and an outlet with an actuator of pressure relief connected to the cavity of greater pressure of the accumulator.

Description

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The invention relates to devices for ensuring reliable functioning of mechanical seals installed in the rotating shaft from the working cavity of apparatus with displacing devices, rotary mixers or pumps, can be used at chemical, petrochemical, food, pharmaceutical and other industrial plants. is an improvement of the invention on the main author. St. No. 1113618. The purpose of the invention is to increase reliability by eliminating the influence of aggressiveness. environment on the elements of the device, as well. protect the device from excessive pressure transfer.

The drawing schematically shows the proposed device.

The accumulator is divided by piston 2 into two cavities — a cavity 3 of greater pressure and a cavity 4 of lower pressure. A cavity 3 of greater pressure is connected to the chamber of the mechanical seals and the outlet of the power supply unit - by the pressure pipe of the feed pump 6. The cavity 4 of a lower pressure is connected to the working cavity of the apparatus 7. The spring 8 acts on the piston 2 in such a way as to create the necessary excess (differential) pressure cavity 3 above the pressure in the cavity 4. The differential pressure sensor 9 is connected to the cavity 3 by the positive inlet and accumulator 1 to the negative one. The output of the 9 coejui-ieii sensor 9 with the switching on element (relay, starter) of the pump 6. In the power supply input um also races Khodnev container 10 with the gate conductors, kostyo coupled to vsasyvayu1tsim patrublo. l-pump 6.

The drive 1 is made in the form of a sealant, a cylindrical tank 11, inside

Secondly, a cylinder 13 is sealed on the lid 12, inside which there is a piston 2 with o-rings and a rod 14, a support disk 15 is mounted on the latter, between which and a ring stop 16 a compression spring 8 is installed on the outer surface of the cylinder 13. The device is equipped with an actuator 17 for depressurization (adjustable ventille) connected to the cavity 3 with shafts and a container 10 with a barrier fluid, as well as with the pressure differential sensor 8, the inputs of which are communicated with cavities 3 and 4.

The device works as follows.

The predetermined pressure drop in the cavity is about 4 and the volume; the length; the diameter (AibKc due to the spring 8 compression, since the spring 2 on both sides is equal. The sensor 9 switches on the pump 6, which fills the barrier liquid from the tank 10 with the cavity 3 of the storage device 1 and a mechanical seal chamber 5, developed and the pressure required to overcome and back-up in the working cavity of the alumina 7 and compress the spring 8. The spring 8 is installed between the annular abutment 16 and d) by the porous disk 15, which is compressed under the pressure of the slack in the cavity 3 on gilop ady nopijiHH 2, s which comes and plosh. s ppoka 14. But dostmzhekim g.redelpogo drop dav.1epp. the corresponding value is its hall. The initial value is the compression of the spring 8, the sensor is 9 c), the pump 6. The sensor includes 18 lvvleniya, set to a higher drop, the pressure, which is

Claims (1)

DEVICE FOR FILLING WITH THE LIQUID OF THE END-SEAL OF THE UNIT according to ed. St. No. 1113618, characterized in that, in order to increase reliability, the separating element of the drive is made in the form of a cylinder with a piston, the rod of which is equipped with a support disk, the cylinder being located coaxially with the walls of the drive and an annular stop is made on its outer surface, and the elastic element is located between the ring emphasis and a supporting disk, while the device is equipped with a pressure sensor, the inputs of which are communicated with. cavities of a larger and lower pressure of the accumulator, and the output with the actuator pressure relief connected to the cavity of a higher pressure of the accumulator. > TO? On the cover 12, a cylinder 13 is tightly fixed, inside of which there is a piston 2 with sealing rings and a stem 14, a support disk 15 is mounted on the latter, between which and an annular stopper 16, a compression spring 8 is installed on the outer surface of the cylinder 13. The device is equipped with an actuator 17 for pressure relief (adjustable valve) connected to the cavity 3 of the accumulator 1 and the capacity of 10 with the shutter fluid, as well as to the differential pressure sensor 18, the inputs of which are connected to the cavities 3 and 4. The device operates as follows ⁵ 30 m. The predetermined pressure drop in the cavities 3 and 4 is provided only by the compression spring 8, since the piston 2 has equal areas on both sides. The sensor 9 includes a pump 6, which fills the shutter fluid from the tank .10 cavity 3 of the drive 1 and the chamber 5 of the mechanical seal, developing the pressure necessary to overcome the back pressure in the working cavity of the apparatus 7 and compress the spring 8. The spring 8 is installed between the ring stop 16 and the support disk 15, is compressed under the influence of fluid pressure in the cavity 3 on the area of the piston 2, which includes the area of the rod 14. Upon reaching the maximum pressure drop corresponding to the set value of compression of the spring 8, the sensor 9 turns off the pump 6. A pressure sensor 18 is configured to operate, configured for a higher pressure drop, which acts on the pressure relief device 17 to control the opening of the valve. Excess fluid drains into tank 10. ί