SU1536120A1 - Shaft end seal - Google Patents

Abstract

The invention relates to hydraulic engineering, in particular, devices for cooling the mechanical seals of pump shafts, preferably for high peripheral speeds. The purpose of the invention is to simplify the design of the mechanical seal by using the friction surface of the rotating face of the rotating disk of the disc friction to create circulation coolant. The mechanical shaft seal comprises a housing, a friction pair, an axially rotating rotary ring, and a ring rotating with the shaft and forming a gap relative to the housing, communicated with a coolant circulation system, radial channels formed in the housing for supplying and discharging the cooling medium and means circulation, the elements of which are made directly on the seal parts. The supply channel is made in the area of the inner diameter of the rotating ring, and the discharge channel is located outside the contact plane of the pair of friction, and the gap between the body and the rotating ring is made diffuser. 1 il.

Description

one

(21) 4322340 / 23-29

(22) 11/02/87

(46) 01/15/90. Bul № 2

(71) Sumy Scientific and Production Association of an Energy Pump Engineering Iasosenergomash

(72) B.V. Moskalenko, K.V. Lisitsyn and N.N. Perminov

(33) 62-762 (038.8)

(56) Golubev A.I. Face seals of rotating shafts. M .: Mashinostroenie, 1974, fig. 145 5, p. 190.

(54) SHAFT SEAL

(57) The invention relates to hydraulic engineering, in particular to devices for cooling the mechanical seals of pump shafts, preferably for high peripheral speeds. The purpose of the invention is to simplify the design of the mechanical seal by using the rotating friction disk of the mechanical face of the rotating face of the sealing disk to create circulation of the cooling fluid of the disk friction power. The mechanical shaft seal includes a housing, a pair of friction, including an axially movable ring and a ring rotating with the shaft and forming a gap relative to the housing, communicated with a coolant circulation system, radial channels formed in the housing for supplying and discharging the cooling medium and means circulation, the elements of which are made directly on the seal parts. The supply channel is made in the area of the inner diameter of the rotating ring, and the discharge channel is located outside the contact plane of the pair of friction, and the gap between the body and the rotating ring is made diffuser. 1 il.

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(/)

The invention relates to hydraulic engineering, and more specifically to devices for cooling the mechanical seals of pump shafts, preferably for high peripheral speeds.

The aim of the invention is to simplify the design of the end seal by using the rotating surface of the end face of a rotary disc to create circulation of the cooling fluid of the disk friction power of the end face.

The drawing shows a section of the mechanical seal.

The mechanical seal comprises a housing 1, in which an axially movable ring 2 is installed, which rotates together with the shaft 3, a ring 4, a cooling system 5.

Between the housing 1 and the rotating ring 4 there is a gap 7 with an inner surface 6 communicating with the cooling system 5 by the inlet 8 and the outlet 9 channels. The inlet 10 of the feed channel 8 is in the zone of the inner diameter of the rotating ring 4.

SP

with about

to

Seal works as follows.

When the shaft 3 rotates, the fluid due to the work of the friction forces on the rotating surface of the ring acquires kinetic energy, which is converted into pressure P1, which exceeds the pressure in the location zone of the inlet channel 8. When the gap 7 is made diffused, its hydraulic resistance decreases and conditions for kinetic conversion are improved energy to energy pressure. Under the action of differential pressure, the heated fluid from the seal chamber enters the cooling system 5, thereby ensuring the circulation in the circuit, and eliminates the need for additional devices, simplifying the design of the seal.

five

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Claims (1)

Invention Formula A mechanical shaft seal containing a body, a pair of friction, including an axially movable ring and a ring rotating with the shaft and forming a gap relative to the body, communicated with the coolant circulation system made in the body by radial channels for supplying and discharging the cooling medium, and The circulation circuit, the elements of which are made directly on the parts of the seal, characterized in that, in order to simplify the design, the inlet channel is made in the area of the inner diameter oc ring and the discharge channel is situated outside the plane of contact of the pair of friction, the gap between the housing and the rotary ring may be made diffuser.