SU945545A1

SU945545A1 - Shaft staffing box

Info

Publication number: SU945545A1
Application number: SU802940164A
Authority: SU
Inventors: Валерий Иванович Лебедевич; Николай Матвеевич Быстров; Антон Самойлович Тимошук; Алексей Иванович Мильченко
Original assignee: Предприятие П/Я А-7899
Priority date: 1980-06-17
Filing date: 1980-06-17
Publication date: 1982-07-23

Description

Изобретение относитс к уплотнительной технике. Известна конструкци сальниковог уплотнени , содержаща корпус, нажи ную грундбуксу и набивку ПЗНедостатком данной конструкции вл етс неравномерное распределени радиального давлени по длине сальникового уплотнени . Наибольшую нагрузку несут первые кольца набивки вследствие ее трени , возникающего между набивкой и валом и,набивкой и корпусом. Известно также сальниковое уплот нение дл вращающихс валов, в корпусе которого между валом и подвижной в осевом направлении втулкой ра мещена камера с набивкой, поджимаемой в осевом направлении нажимным элементом 2. Недостатком указанного устройств вл етс неравномерность распределе ни радиального давлени по высоте набивки за счет трени ее по валу В момент поджати , а также возможность утечки рабочей среды по наружной поверхности втулки, что ведет к потере герметичности сальникового узла. Известно сальниковое уплотнение вала, содержащее корпус, подвижную в осевом направлении сальниковую камеру , набивку, нажимную грундбуксу и зафиксированную на валу от проворота втулкуО1. Однако известное устройство позвол ет использовать эффект самоуплотнени в зависимости от измен ющегос в рабочей полости давлени , однако потери на трение при вращении вала в этом случае не снижаютс . При создании усили зат га камера доходит до упора в гайку и далее усилие зат га расходуетс на преодоление сил статического трени между набивкой и валом, между набивкой и сальниковой камерой, т.е. среды. В этом случае набивка как и iThis invention relates to a sealing technique. The known design of the packing seal, comprising a housing, a packed bottom pack and a packing. The disadvantage of this design is the uneven distribution of the radial pressure along the length of the packing seal. The first packing rings bear the greatest load due to its friction that occurs between the packing and the shaft and the packing and the body. It is also known to have a gland seal for rotating shafts, in the casing of which between the shaft and axially movable sleeve there is a chamber with gasket pressed in axial direction by pressure element 2. The disadvantage of this device is the uneven distribution of radial pressure over the packing height due to friction its shaft At the time of preload, as well as the possibility of leakage of working medium on the outer surface of the sleeve, which leads to loss of tightness of the stuffing box. Known stuffing shaft seal, comprising a housing, an axially movable stuffing box, a gasket, a pressure box, and a sleeve O1 fixed on the shaft against rotation. However, the known device allows the use of a self-sealing effect depending on the pressure varying in the working cavity, however, the friction loss during rotation of the shaft in this case does not decrease. When creating an effort, the chamber comes as far as the nut and further the effort is spent to overcome the forces of static friction between the packing and the shaft, between the packing and the stuffing box, i.e. environment. In this case, the packing is like i

Claims

SUMMARY OF THE INVENTION · An stuffing box seal of a shaft, comprising a housing axially movable stuffing box, a shaft by means of an additional 15 bushing, a pressure packing follower and a lockphone. FIG. 1 presents a seal General view, section; in FIG. 2 from Vav On the shaft, section AA in figure 1. The packing gland consists of a housing 1, a pressure packing 2, la 3 with a key 4, which includes a groove 5 of the sleeve 6. Between the sleeve 6 and the chamber 7, which is hermetically connected to the lower end surface

1. Seals. Under. ed. Zhytomyr. M., Engineering, 1964,

131, Fig. 5-

1 by means of a bellows 8, a stuffing box 9 is located. The sleeve 6 is also sealed by its lower end surface to the shaft 3 through a bellows 10 and a pressure nut 11.

When preloading the pressure packing follower

2. British Patent Ν ’129434], CL F 2 V, published. 1972.

2, the stuffing box packing 9 is uniformly compressed along the entire length of the stuffing box packing due to the elimination of sliding friction of the packings 9 * on the sleeve, which is socked on the shaft from the crank, characterized in that, in order to increase the tightness of the packing by ensuring uniform compression along the entire length of the stuffing box, the stuffing box connected to the housing by means of a bellows, and the sleeve is axially displaceable on the shaft and sealed from the side of the cavity by means of an additional bellows on.

, Sources of information Taken into account in the examination

3. The Federal Republic of Germany patent No. 965545, class 47 f 23, published. 1957 (prototype).

FROM.

Aa

FIG. 2

VNIIIPI Order 5299/52

Circulation 990 Subscription

Branch of PPP Patent,

Uzhhorod, Project 4,