SU819465A1

SU819465A1 - End-face seal

Info

Publication number: SU819465A1
Application number: SU762380405A
Authority: SU
Inventors: Евгений Григорьевич Попов; Анатолий Данилович Зуев; Николай Федорович Бобиков; Михаил Александрович Шаров; Валерий Алексеевич Родионов; Анатолий Степанович Черкашин
Original assignee: Предприятие П/Я А-1697
Priority date: 1976-07-16
Filing date: 1976-07-16
Publication date: 1981-04-07

Description

(54) ТОРЦОВОЕ УПЛОТНЕНИЕ(54) MECHANICAL SEAL

1one

Изобретение относитс к уплотнительной технике, а именно к торцовым уплотнени м , преимущественно ходовой системы самоходной машины.The invention relates to a sealing technique, namely to mechanical seals, preferably a running gear system of a self-propelled machine.

Известны торцовые уплотнени дл вращающихс валов и корпусов, имеющие неподвижное и вращающеес уплотнительные кольца а также пружину, корпусные детали и вторичные уплотнительные элементы, у которых стопорение указанных колец от проворота осуществл етс щтифтом или щпонкой.Mechanical seals for rotating shafts and housings are known, having fixed and rotating sealing rings as well as a spring, body parts and secondary sealing elements, in which these rings are locked from turning by means of a pin or pin.

Наиболее близким рещением к предлагаемому вл етс торцовое уплотнение со стопор щими поверхност ми в виде выступов у подвижного в осевом направлении уплотнительного кольца и несквозных пазов у корпуса уплотнени , причем в зазорах между упом нутыми выступами и пазами установлены резиновые детали - демпферы, назназначение которых - не допустить контакта металлических стопор щих поверхностей между собой 1.The closest solution to the present invention is a mechanical seal with locking surfaces in the form of protrusions in the axially movable sealing ring and non-through grooves in the seal housing, and rubber parts — dampers — are used in the gaps between these protrusions and grooves; Allow metal locking surfaces to come in contact with each other 1.

Недостатком такой конструкции стопорени вл етс наличие открытых воздействию внещней среды радиальных Зазоров между демпферами и несквозными пазами корпусаThe disadvantage of this locking design is the presence of radial clearances between dampers and non-through slots of the housing open to the external environment.

уплотнени . Эти зазоры ничем не защищены и могут забиватьс пылью, абразивными частицами грунта, которые при загр знении , например, двух односторонне расположенных пазов из четырех имеющихс могут сдвинуть в радиальном направленииcompaction. These gaps are not protected by anything and can be clogged with dust, abrasive soil particles, which, when contaminated, for example, with two unidirectionally arranged grooves out of four available, can be moved in the radial direction.

уплотнительное кольцо, что приведет к течи масла, так как приработанный по сок упом нутого кольца сдвинетс относительно приработанного по ска сопр женного уплотНительного кольца. a sealing ring, which will lead to oil leaks, as the added-over juice of the mentioned ring will move relative to the running-in adjacent sealing ring.

0 Целью изобретени вл етс повыщение ресурса работы торцового уплотнени путем исключени проворотов уплотнительных колец относительно сопр женных деталей , а также уменьщени износа стопорных устройств и сохранени возможности посто нного перемещени вращающегос уплотнительного кольца.0 The aim of the invention is to increase the life of the mechanical seal by eliminating the twisting of the sealing rings relative to the mating parts, as well as reducing the wear of the locking devices and maintaining the possibility of constant movement of the rotating sealing ring.

Claims

This goal is achieved by the fact that the sealing rings and body parts of the seal have locking devices in the form of lubricated surfaces of an elliptical cylinder, mating with each other with a gap, without the use of additional parts. FIG. 1 shows the proposed mechanical seal, a longitudinal section; in fig. 2, section A-A of FIG. one; in fig. 3-section BB FIG. 1. The mechanical seal has a stationary 1 and a rotating 3 sealing rings pressed against it by a spring 2, located respectively in the housing 4 and in the casing 5 of the seal. Rubber rings 6 and 7 are placed between the sealing rings and the aforementioned parts. When the lubricant solidifies on the contact end surfaces of the metal sealing rings 1 and 3, which takes place at negative temperatures (-30 ° C and below), when moving the mash the moment arising on the working end surfaces of the rings 1 and 3 will tend to rotate them inside the rubber rings 6 and 7 and this is prevented by locking devices made in the form of the surfaces of an elliptical cylinder. If you do not interfere with the specified rotation of the sealing rings inside the rubber, then the surfaces of the metal sealing rings that mate with the rubber rings will wear out, since the starting points occur countless times and, as a result, oil leaks at the mentioned interfaces. Therefore, on the inner surface of the sealing ring 3 and on the outer surface of the ring 1 are located locking devices in the form of surfaces of an elliptical cylinder. Similar locking devices are located on the surfaces of the shaft 8 and the housing 4 mating with the indicated sealing rings. The locking devices are made in Hades of the surface of an elliptical cylinder to reduce wear of the locking surfaces. These stop surfaces are in a closed oil bath, which further reduces wear. The reduction in wear of the locking surfaces has a positive effect on the unhindered axial movement of the ring 3, which must remain pressed against the ring 1 even when the shaft 8 is axially moved. To ensure the said movement of the rings, their locking surfaces are made with a gap between them and similar shaft surfaces and enclosures. Due to the presence of axial movement and the absence of rotation of the sealing rings in the mating parts, the life of the sealing operation is increased by 2 times. Claims of the Invention Mechanical seal, mainly of the self-propelled driving system, includes a stationary sealing ring and a rotating sealing ring pressed against it, the first associated with the housing, and the second with the shaft locking devices, characterized in that, in order to increase the service life, the locking devices are made in the form of lubricated over awns elliptical cylinder formed on the mating surfaces of the rings, the housing and the shaft with clearances between these surfaces, information sources, the received note in the examination 1. Copyright certificate USSR № 191290, cl. F 16 J 15/34, 1965.

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