High-temperature-resistant elastic sealing pipeline compensator

Abstract

The utility model relates to a high-temperature-resistant elastic sealing pipeline compensator, and belongs to the field of aircraft high-pressure guide pipes. The compensator comprises a shell, a lubricating block, a sealing connecting assembly and a clamping ring. Openings of the two shells are opposite, concentric lubricating blocks are inserted into the openings, the sealing connecting assembly is of a drum-shaped structure with the two ends flared and the middle closed, the lubricating blocks of the shells are inserted into the flared structures at the two ends respectively, and the lubricating blocks are in interference fit with the sealing connecting assembly. The shells which are connected together can be stretched and bent, and the middle closing opening is exposed between the two shells; an annular groove is formed in the inner edge of the opening, a clamping ring is installed in the annular groove, and the end, extending out of the annular groove, of the clamping ring abuts against the sealing connecting assembly to prevent the sealing connecting assembly from disengaging in the using process; the shell and the sealing connection assembly are coaxial.

Description

Technical Field

[0001] The utility model relates to a high-temperature resistant elastic sealing pipeline compensator, belonging to the field of aircraft high-pressure conduits. Background Art

[0002] When the aircraft high-pressure duct system is working, the pipe will be deformed due to temperature changes, mechanical vibrations, etc. In order to reduce the stress in the pipe, compensation elements need to be arranged to compensate for its deformation. The common compensation method is the bellows compensator, which uses the elastic deformation performance of the bellows to achieve the effect of compensating displacement. Its specific structures mainly include free-type compensators, tie rod compensators, pressure-balanced compensators, and ball joints.

[0003] 1) The free-type compensator has a simple structure and can compensate for axial and radial displacements. However, since the bellows tends to stretch when pressurized, it will produce a pressure thrust on the pipeline support or equipment, and has high requirements on the strength of the pipeline fixing system.

[0004] 2) Tie rod type pipeline compensators and pressure balance type compensators have added axial tensile limit function on the basis of free type compensators. They have complex structure and large outer dimensions. As thin-walled parts, the exposed structure of bellows is prone to surface defects of bellows, causing premature failure.

[0005] 3) The spherical joint structure is widely used in pipelines. It has the advantages of compact structure, long service life, and bellows embedded structure. However, since the spherical joint can only achieve angle compensation, it cannot compensate for displacement in the straight pipe system. Utility Model Content

[0006] The purpose of the utility model is to provide a pipeline compensator which can realize axial, radial and angular self-limiting and high-temperature resistant elastic sealing.

[0007] The technical solution of this utility model:

[0008] The utility model provides a high temperature resistant elastic sealing pipeline compensator, comprising: a shell, a lubricating block, a sealing connection component, and a clamping ring;

[0009] The openings of the two shells are opposite to each other, and concentric lubricating blocks are inserted into the openings. The sealing connection component is a drum-shaped structure with expanded openings at both ends and a closed opening in the middle. A lubricating block of a shell is inserted into each of the expanded openings at both ends. The lubricating block and the sealing connection component are interference-fitted, so that the connected shells can be stretched and bent while realizing the sealing connection function, and the closed opening in the middle is exposed between the two shells. An annular groove is provided on the inner edge of the opening, and a snap ring is installed in the annular groove. One end of the snap ring extending out of the annular groove abuts against the sealing connection component to prevent the sealing connection component from falling out during use.

[0010] The housing, the lubrication block and the sealing connection assembly are coaxial.

[0011] Furthermore, the outer surface of the expansion structure is spherical; a circle of stopping structure is arranged inside the outer opening of the shell, and the top of the stopping structure is arranged as a concave spherical surface. The stopping structure is against the expansion, and the concave spherical surface of the stopping structure cooperates with the spherical surface of the expansion to form a revolving pair.

[0012] Further, the sealing connection assembly includes a sealing ring and a support ring;

[0013] The support ring is sleeved inside the sealing ring. The support ring is concentric and has the same shape as the sealing ring and is located on the axis of the pipeline compensator. Both are drum-shaped structures with expanded ends and closed middle.

[0014] Furthermore, the lubricating block is a graphite lubricating block.

[0015] Furthermore, a gap is provided between the sealing ring and the supporting ring to prevent the sealing ring from being greatly deformed and causing plastic deformation.

[0016] Furthermore, the clamping ring is assembled in the housing, and the inner diameter of the clamping ring is smaller than the outer diameters of the sealing ring and the supporting ring, so as to prevent the parts from falling out and stop.

[0017] Furthermore, the sealing ring is a thin-walled metal ring, and the thin-walled metal ring and the graphite lubricating block are interference-fitted to achieve sealing.

[0018] Furthermore, the clamping ring is two semicircular rings.

[0019] Beneficial effects of the utility model:

[0020] The product adopts metal sealing ring and graphite lubricating block elastic seal, which solves the pressure thrust effect generated when bellows seal is used. Compared with other bellows compensator structures with self-limiting function, it solves the problems of complex structure, large size, heavy weight, easy breakage of tie rods during vibration of tie rod type compensators and pressure balance type compensators, and the problem that spherical joints cannot compensate for the displacement of linear pipe systems; the graphite lubricating block has a high operating temperature and can be used in high temperature areas; the product adopts non-metallic sealing ring to realize the lubrication function, and the required compensation load is small, which is conducive to meeting the pipeline compensation needs; through the reasonable design of the dimensions of each part, it is ensured that the product has a stopping function and that the product will not be over-compensated. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of a high-temperature resistant elastic sealing pipeline compensator. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In high-temperature and high-pressure pipelines, the deformation of the pipeline caused by temperature changes and vibrations during operation requires compensation by pipeline compensators to ensure the safe operation of the pipeline. The straight pipe compensators in high-pressure pipelines are generally free-type pipeline compensators, tie-rod-type pipeline compensators, and pressure-balanced pipeline compensators, but the free-type compensators have no infinite position function, the tie-rod-type compensators and pressure-balanced pipeline compensators have large outer dimensions and heavy weight, and the tie-rod mechanism is prone to breakage failure in a vibrating environment.

[0024] The utility model provides a high temperature resistant elastic sealing pipeline compensator, such as Figure 1 As shown, it includes: housing 1 (2 pieces), snap ring 4 (4 pieces), lubricating block 2 (2 pieces), sealing ring 3 (1 piece), support ring 5 (1 piece) 5 kinds of 10 components are assembled together. The schematic diagram of its structure is shown in the figure below. Its structural features are as follows:

[0025] The sealing connection function is achieved by setting the interference between the sealing ring and the lubricating block;

[0026] A gap is provided between the sealing ring and the support ring, which allows the sealing ring to deform to a certain extent to achieve the sealing connection function, while preventing the sealing ring from deforming too much and causing plastic deformation;

[0027] The sealing ring and the support ring can slide freely in the housing equipped with the lubricating block to achieve axial compensation function;

[0028] The sealing ring has the same center as the supporting sphere and is located on the axis of the pipeline compensator, so that the parts can rotate around the center of the sphere to achieve angular and radial compensation;

[0029] A circle of stopping structure is arranged inside the outer opening of the shell, and the top of the stopping structure is arranged as a concave spherical surface. The stopping structure presses against the sealing ring and can play a role of compression limiting. The concave spherical surface of the stopping structure cooperates with the spherical surface of the expanded opening to form a spherical rotating pair, so that the sealing ring can rotate in the shell.

[0030] The clamping ring is assembled in the housing, and its inner diameter is smaller than the outer diameters of the sealing ring and the supporting ring, so as to prevent the parts from falling out and stop.

[0031] The graphite lubricating block has a lubricating function, which reduces the product compensation load and is conducive to meeting the pipeline compensation requirements.

[0032] The utility model provides a high temperature resistant elastic sealing pipeline compensator, which adopts the interference fit of metal elastic sealing ring and graphite lubricating block to play the role of elastic sealing. Since the graphite material can be used reliably at higher temperatures, the product can realize the sealing connection function at higher temperatures. A support ring is assembled inside the elastic sealing ring to limit the deformation of the elastic sealing ring and prevent its plastic deformation. The performance is stable during use; a new stop structure is designed, and the stop is performed by assembly, which reduces the deformation of parts caused by welding.

[0033] This high-temperature resistant elastic sealing pipeline compensator has axial, radial, angular compensation and self-limiting functions; the sealing function is achieved through the elastic sealing structure, which solves the pressure thrust generated by the bellows; through the lubrication of graphite, the product compensation load is reduced, which is conducive to meeting the pipeline compensation needs.

[0034] The utility model innovatively designs a sealing connection component of a metal sealing ring and a support ring. The sphere centers of the two are the same and are both located on the axis of the product, thereby ensuring that the sealing connection component can slide and rotate freely in a housing equipped with a lubricating block, thereby realizing the axial, radial and angular compensation functions of the product. A reasonable gap is provided between the metal sealing ring and the support ring, which, on the one hand, allows a small amount of deformation to occur when the metal sealing ring and the lubricating block are interference-fitted, thereby playing a role of elastic sealing, and, on the other hand, provides support for the thin-walled metal sealing ring, thereby preventing the sealing ring from excessively deforming during use, thereby causing premature failure. The lubricating block is made of graphite material, which has the advantages of low friction coefficient, good temperature resistance and good wear resistance, thereby enabling the sealing connection component to slide freely in the lubricating block, and the required compensation load is small, and the use The invention has high temperature and long service life, and can meet the long service life and high reliability requirements of aircraft high temperature and high pressure pipeline compensation devices; a circle of stopping structure is arranged inside the outer opening of the outer shell, and the top of the stopping structure is arranged as a concave spherical surface, and the stopping structure abuts against the sealing ring, which can play a role of compression limit, and the concave spherical surface of the stopping structure cooperates with the spherical surface of the sealing connection component to form a spherical rotating pair, so that the sealing connection component can rotate in the outer shell; an annular groove is arranged on the inner edge of the opening of the outer shell, and a retaining ring is installed in the annular groove, and one end of the retaining ring extends out of the annular groove and abuts against the sealing connection component to prevent the sealing connection component from falling out during use, and plays a tensile limit function. The method adopts assembly process for stopping, which effectively reduces the deformation of parts caused by the welding process, improves the matching accuracy of parts, and improves the compensation function of the product.

[0035] The above is only a specific embodiment of the utility model, and the utility model is described in detail. The undetailed part is conventional technology. However, the protection scope of the utility model is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. The protection scope of the utility model shall be based on the protection scope of the claims.

Claims

1. A high temperature resistant elastic sealing pipeline compensator, characterized in that: include: Housing, lubrication block, sealing connection assembly, snap ring; The openings of the two shells are opposite to each other, and concentric lubricating blocks are inserted into the openings. The sealing connection component is a drum-shaped structure with expanded ends and closed middle. The expanded structures at both ends are respectively inserted with a lubricating block assembled on the shells. The lubricating block and the sealing connection component are interference fit, so that the connected shells can be stretched and bent while realizing the sealing connection function, and the closed middle is exposed between the two shells; an annular groove is provided on the inner edge of the opening, and a snap ring is installed in the annular groove. One end of the snap ring extending out of the annular groove abuts against the sealing connection component to prevent the sealing connection component from falling out during use; The housing, the lubrication block and the sealing connection assembly are coaxial; The sealing connection assembly includes a sealing ring and a support ring; The sealing ring is sleeved with the support ring, and both inner and outer surfaces of the two are spherical surfaces. The sphere centers are concentric and located on the axis of the pipeline compensator. Both are drum-shaped structures with expanded ends and closed in the middle.

2. The compensator according to claim 1, characterized in that The outer surface of the flared structure is a spherical surface; a circle of stopper structure is arranged inside the outer opening of the shell, the top of the stopper structure is arranged as a concave spherical surface, the stopper structure abuts against the flared opening, and the concave spherical surface of the stopper structure cooperates with the spherical surface of the flared opening to form a revolute pair.

3. The compensator according to claim 1, characterized in that: The lubricating block is a graphite lubricating block.

4. The compensator according to claim 1, characterized in that A gap is provided between the sealing ring and the supporting ring to prevent the sealing ring from being deformed significantly and causing plastic deformation.

5. The compensator according to claim 1, characterized in that: The clamping ring is assembled in the housing, and the inner diameter of the clamping ring is smaller than the outer diameters of the sealing ring and the supporting ring, so as to prevent the parts from falling out and stopping.

6. The compensator according to claim 3, characterized in that: The sealing ring is a thin-walled metal ring, and the thin-walled metal ring and the graphite lubricating block are interference-fitted to achieve sealing.

7. The compensator according to claim 1, characterized in that: The clasp is composed of two semicircular rings.

Images