RU1770504C - Steam head for heated cylinders - Google Patents

Abstract

Usage: for supplying steam and draining condensate in the cylinders of pulp and paper industry machines. SUMMARY OF THE INVENTION: The steam head comprises a housing with an inner cylindrical surface, a coaxially disposed cup, an o-ring and a spring-loaded centering element. The centering element is made in the form of a split sleeve mounted between the glass and the body. The inner surface of the sleeve and the surface of the cup in contact with it are conical. The outer surface of the sleeve in contact with the inner surface of the housing is cylindrical. The spring of the centering element is mounted from the end of the split sleeve opposite to the location of the sealing ring. 1 ill.

Description

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WITH

The invention is intended for supplying steam and draining condensate, for example, to drying, glazing cylinders, calender rolls and can be used in the pulp and paper industry.

The closest analogue is the steam head according to ed. St. No. 371292, class D 21 F5 / 10, comprising a fixed housing with a rotating cup mounted therein, washers, o-rings, and a spring. The portion of the inner surface of the housing of the steam head and the surface of the sealing ring interacting with it are conical.

The disadvantages of this design include the difficulties encountered in its manufacture, and lack of reliability.

This is explained by the fact that it is extremely difficult to ensure the accuracy of machining of the outer and inner spherical surfaces to ensure their full fit. In practice, this cannot be achieved and reliable operation of the head cannot be achieved until the seal is run in on the ear of the operated steam head.

In addition, since the steam head housing has an additional rigid fastening along its outer part, additional sealing forces inevitably arise, which cannot be eliminated by the completely spherical shape of the rings.

The aim of the invention is to simplify the design while ensuring operational efficiency.

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Comparison of the claimed technical solution with the prototype shows that it is distinguished by the presence of a split otulka with a conical inner surface and the installation location of this sleeve, therefore it can be concluded that the novelty criterion is met.

An analysis of other technical solutions did not allow us to identify the use of split bushings with a Conical inner surface as a supporting element to increase the efficiency of the seals, therefore, this proposal, in our opinion, meets the criterion of significant differences.

The drawing shows a General view of the device in section.

The head contains a housing 1, supported by a centering element 2, made in the form of a split sleeve made of antifriction material with a cylindrical outer surface and a conical inner surface, a cup 3 with a section of a conical external surface, element A made in the form of a cylindrical spring, which compresses the split sleeve against the thrust rings 5 of the mechanical seal (ring) 6 installed between the end surfaces of the glass 3 and the cover of the housing 1, flange connection 7 and the rod 8, one end fixed to a support, for example Lindre 9, and the other conductive seed freely in the groove of the body 1 by a pin or finger 10. In order to feed steam or a mixture of hydrochloric parovod in the housing 1 there is pipe 11.

The device operates as follows.

When the shaft rotates, at the same time the cup 3 rotates, attached to the shaft pin with a collapsible flange connection 7. The housing 1 is stationary, rests on the supporting element 2 and is kept from turning by the finger 10 of the rod 8. The supporting element 2, made of antifriction material in the form split sleeve with an inner cone, rotates with the glass 3. Due to the presence of an elastic element (spring) 4, the end wall of the housing 1 is pressed against the end surface of the sealing ring 6, and the latter, in turn, to the end surface spine of the rotary cup 3.

Steamed or steam to the medium, entering through the pipe 11 of the steam head, enters the cylinder and partially penetrates through the annular gap between the rotating split sleeve 2 and the stationary housing 1. At the same time, it

acts as an additional lubricant between rubbing surfaces. The role of the seal between the vapor phase and the atmosphere is played by the mechanical seal ring b, which is pressed against

the end plane of the rotating cup 3 by the clamping force from the action of the elastic element (spring) 4 and the pressure of the medium in the head cavity.

To compensate for the wear of the outer surface of the split sleeve 2, it is enough to remove one of the mounting rings 5, and under the action of the spring, the split ring will move along the conical surface of the cup 3 and press against the inner surface of the housing 1.

Due to the fact that the body of the steam head is centered on a rotating cup using a supporting split sleeve, the outer surface of which is made

cylindrical, and internal to compensate for its conical wear, skewing of the housing relative to the mechanical seal is eliminated, and the durability and reliability of the seal are increased. Besides,

surface pre-running and any additional devices for unloading the weight of the voice are not required.

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Claims (1)

The claims A steam head for heated cylinders, comprising a housing with an inner cylindrical surface, a coaxially disposed cup, an o-ring and a spring-loaded centering element, characterized in that, in order to simplify the design while ensuring efficiency in operation, the centering the element is made in the form of a split sleeve installed between the glass and the body, the inner surface of the sleeve and the surface of the glass in contact with it are made conical, the outer surface the sleeve in contact with the inner surface of the housing is cylindrical, and the spring of the centering element is mounted at the end of the split sleeve opposite to the location of the o-ring. Se