RU2462651C1 - Compensator of angular shifts of air pipeline elements - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: compensator of angular shifts of air pipeline elements relates to aviation equipment, in particular, to pipelines of an air conditioning system (ACS) of an airplane and serves to absorb temperature expansions of air in ACS pipelines of aircrafts. The compensator of angular shifts of air pipeline elements comprises a pipe from two spheroid tips, one of which is detachable, two tightening devices, made of a clamping bushing and a cap flange. In cap flanges and clamping bushings of both tightening devices there are shaped toroid grooves arranged, where metal sealing rings are installed, having a shape of a toroid with an inner conical cut. Edges of sealing rings are pressed to the spherical surface of the pipe tip with the help of a threaded connection of the cap flange and the clamping bushing. Along the thread of a detachable tip and in the threaded joint of the cap flange and the clamping bushing there is an anaerobic sealant in the form of a locking and sealing element.

EFFECT: when using the invention, extent of joint tightness along spheroid surfaces increases, repairability of a compensator of angular shifts due to movability of its elements, compensation of assembly errors.

2 cl, 5 dwg

Description

The compensator for the angular displacements of the elements of the air pipeline relates to aircraft, in particular to the piping of the air conditioning system (KSKV) of the aircraft, and is used to absorb the temperature expansion of air in the pipelines of the KSKV aircraft. Known compensator for the angular movements of the elements of the pipelines of the bellows type used on aircraft TU-214. The disadvantages of this compensator are the small angles of rotation of the compensation, the large complexity of manufacturing, large dimensions and weight.

Known compensator for the angular movement of pipelines (USSR author's certificate No. 870844), consisting of a pipe with a spherical tip, a seal in the form of an oil seal with a thrust ring, a flange and a pressure sleeve. The disadvantage of this compensator is unregulated in operation and low degree of compaction during installation, achieved by a related change in the thickness of the two elements.

The closest technical solution to the proposed one is a compensating device for pipelines (patent RU 2293900 C2).

This compensating device contains two pipes connected by a telescopic connection, each of which has a ball connection at the end, onto which sealing assemblies are installed, consisting of metal adjusting rings and thermally expanded graphite rings, and a ring compression mechanism in the form of a union nut.

The disadvantage of this design is the presence of a large number of parts of complex shape, manufactured with high accuracy. In addition, the mechanical properties of the graphite rings used as a sealant do not allow them to be pressed against ball (spheroid) tips with high specific pressure to create the necessary tightness standards. As a result, a permissible leak at the joints is up to 20 l / min in existing structures with graphite gaskets. The use of sealing elements having a higher coefficient of linear expansion to increase the tightness of the compensator can lead to jamming of the compensator at temperature jumps above the calculated one.

The objective of the invention is to increase the tightness of the joints on the spheroid tips of the pipe compensator link while maintaining their ability to compensate for angular movements, increasing their mobility zone, as well as increasing the degree of tightness of these joints during operation due to the constant pressure of the sealing lip against the spheroidal surface and grinding during operation of sealed surfaces, reducing the number and complexity of angular transitions included in the compensator item elements.

The problem is solved in that the compensator for the angular displacements of the elements of the air pipeline consists of a pipe with two spheroid tips, one of which is removable and mounted on the other end of the pipe, two clamping devices, consisting of a pressure sleeve and a flange, while in the flange and pressure the bushings of both clamping devices have profiled toroidal grooves in which metal sealing rings are installed, having the shape of a torus with an internal conical section, the edges of the sealant GOVERNMENTAL rings are pressed against the spherical surface of the tip of the pipe with a threaded connection and the compression flange clamping sleeve and threadably removable tip and a threaded joint compression flange and clamping sleeve located anaerobic sealant as the sealing member and the X's.

The compensator for the angular movements of the elements of the air pipeline allows you to compensate for the linear expansion of the pipes by the angular movement of the clamping device along the spheroidal tip. Sealing along spheroidal tips is carried out by pressing the outer edge of the sealing rings due to their elastic rotation around the annular axis, and along the toroidal grooves of the clamping device due to the pulling force. The clamping device is controlled by an anaerobic sealant. The required degree of tightness is achieved by pulling together the flange and the pressure sleeve.

The invention is illustrated by drawings.

Figure 1 shows the compensator for the angular displacements of pipelines.

Figure 2 shows a fragment of the compensator for the angular displacements of the pipeline with external elements "B" and "C" in the inoperative "unstretched" state.

Figure 3 shows a fragment of the compensator for the angular displacements of the pipeline with the remote element "G" in working condition.

Figure 4 shows a prototype.

Figure 5 shows an analogue fragment of the compensator.

The compensator for the angular movements of the elements of the air pipeline consists of a pipe 1 with two spheroid tips 2, one of which is removable 3 and mounted on anaerobic sealant 4, a compression device consisting of a pressure sleeve 5 with an external thread and a flange 6 with an internal thread corresponding to the pressure thread bushings 5, with toroidal grooves 7, in which metal O-rings 8 are installed, having a torus shape with an internal conical section, with one o-ring installed in the toroid flange of the flange 6, the second o-ring is located in the toroidal groove of the pressure sleeve 5, and the edges of the seals 8 are pressed against the spherical surface of the pipe ends 2 and 3 due to the threaded connection of the pressure sleeve 5 and the union nut 6.

The proposed compensator for the angular displacements of the elements of the air pipeline to absorb the thermal expansion of air in the KSKV pipeline consists of a pipe with spheroid tips 2 and 3, one of which 3 is removable and mounted on anaerobic sealant 4. At the same time, clamping devices consisting of a clamping device are installed on the spheroid pipe ends bushings 5 with an external thread and a profiled toroidal groove 7, in which a metal sealing ring 8 having the shape of a torus with an internal conical medium is installed of the flange 6 with an internal thread corresponding to the thread of the pressure sleeve, and with a profiled toroidal groove 7, in which a sealing ring 8 having the shape of a torus with an internal conical section is also installed. O-ring 8 is made in such a way that the conical section (chamfer) at the point of contact of the surface of the spheroidal tip makes an angle equal to 3 °. When tightening the clamping sleeve 5 and the flange 6, the sealing rings 8 installed in the toroidal profiled grooves 7 of the pressure sleeve 5 and the flange 6, due to elastic torsion around the ring axis of the torus, provide sealing with their edges on the surface of the spheroidal tip 2 and 3 and the torus surface along the torus surface of the groove 7. The seal is carried out due to the elastic torsion deformation of the seal 8 around the annular axis of the torus and the efforts of pressing the conical section of the torus with the clamping sleeve 5 and sleeve flange 6 on the spheroidal surface of the tip, while the degree of tightness during operation is ensured by a calibrated calculated torque of tightening the clamping device and is 150 ± 5 Nm (15 ± kgf / m). The metal seal is made of an elastic material, for example, bronze having elastic properties. Also, an anaerobic sealant is a locking and sealing element on the thread of the structure.

The advantage of the invention in comparison with the prototype is the ability to reduce the loss of air supplied to the KSKV system, by increasing the degree of tightness of joints on spheroidal surfaces; maintainability of the angular displacement compensator due to the dismountability of its elements and compensation of installation errors due to the use of a removable threaded spheroidal tip and its subsequent fixation by thread with an anaerobic sealant of the Anaterm type in the required position.

Claims (2)

1. The compensator for the angular movements of the elements of the air pipeline, consisting of a pipe with a spheroidal tip, a clamping device in the form of a cap flange and a pressure sleeve, a sealant, characterized in that a removable spheroidal tip and an additional clamping device are installed on the other end of the pipe, while shaped flanges and shaped sealing rings having a torus shape with an internal With a cut, the edges of the o-rings are pressed against the spherical surface of the pipe end using a threaded connection of the union flange and the pressure sleeve, and anaerobic sealant is located as a locking and sealing element along the thread of the removable tip and the threaded connection of the union flange and the pressure sleeve. 2. The compensator according to claim 1, characterized in that the o-rings are made of elastic material.

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