CN114857397A

CN114857397A - Throttling assembly

Info

Publication number: CN114857397A
Application number: CN202110155917.9A
Authority: CN
Inventors: 戴佳莉; 王光强; 孟祥海
Original assignee: AECC Commercial Aircraft Engine Co Ltd
Current assignee: AECC Commercial Aircraft Engine Co Ltd
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2022-08-05

Abstract

The utility model provides a throttle subassembly for pipeline throttle, including throttle spare and sealing ring spare, throttle spare is for having the external diameter, the throttle plate in inner bore diameter, sealing ring spare is the shape memory alloy material, including C type sealing washer and ring seat, C type sealing washer provides the sealed face with pipeline seal fit, the ring seat has interior week side and periphery side, the periphery side is connected with C type sealing washer, throttle spare is located the interior week side of ring seat and is connected with ring seat detachably, above-mentioned throttle subassembly can keep with the well sealed of throttle pipeline, need not change the sealing washer simultaneously, effective resources are saved, replacement simple to operate.

Description

Throttling assembly

Technical Field

The invention relates to the field of pipeline throttling of aero-engines.

Background

An air pipeline of an aircraft engine is an important component of an engine air system, and the air pipeline ensures the sealing and reliable conveying of air media under certain environmental conditions. When an engine is tested, performance indexes of different air flows are required to be tested, and the change of the air flow in a pipeline is usually realized by replacing the orifice plates with different apertures.

A common orifice plate is shown in fig. 1, and is generally made of a copper plate material and has an annular structure, and the orifice plate 10 realizes throttling through an inner ring opening through hole 11. For the throttling of a specific pipeline, a through hole 11 with a specific size is needed, effective sealing between a copper plate material and the pipeline cannot be realized, and if the throttling orifice plate 10 is used alone, the problem of air leakage easily exists. The common solution is that the orifice plate 10 cooperates with a metal seal ring 20 to achieve sealing with the pipeline. As shown in fig. 2, most of the metal seal rings 20 are C-shaped in cross section, and the inner peripheral surface of each metal seal ring is fitted with the orifice plate 10, and the outer peripheral surface of each metal seal ring is tightly attached to the pipeline to realize sealing.

The metal sealing ring is extruded by the pipeline to generate plastic deformation in the sealing process, and the metal sealing ring is not repeatedly used after being disassembled once in order to ensure the sealing property of the pipeline in the actual use process. In an aircraft engine air pipeline, metal sealing rings belong to the finished products mostly, so the metal sealing rings are abandoned only once used, and a large amount of resource waste is caused. In addition, the orifice plate can not be used universally, when the throttling requirement of the pipeline changes in engineering practice, the orifice plate with different apertures needs to be replaced to change the air flow in the pipeline, but the orifice plate and the metal sealing ring need to be used simultaneously, the relationship between the orifice plate and the metal sealing ring is close, the metal sealing ring needs to be disassembled when the orifice plate is replaced, the type selection and the assembly process between the orifice plate and the metal sealing ring are complicated, the metal sealing ring with a proper size needs to be selected to be matched with the orifice plate when the orifice plate is replaced every time, the outer periphery of the orifice plate needs to be pressed into the inner periphery of the metal sealing ring, the working hours are consumed, and the efficiency is low.

Disclosure of Invention

An object of the present invention is to provide a throttle assembly that can maintain good sealing with a throttle pipe without replacing a metal seal ring, effectively saving resources, and improving installation efficiency.

The throttling assembly for achieving the purpose is used for pipeline throttling and comprises a throttling piece and a sealing ring piece, wherein the throttling piece is a throttling plate with an outer diameter and an inner bore diameter, the sealing ring piece is made of shape memory alloy and comprises a C-shaped sealing ring and a ring seat, the C-shaped sealing ring provides a sealing surface which is in sealing fit with the pipeline, the ring seat is provided with an outer peripheral side and an inner peripheral side, the outer peripheral side is connected with the C-shaped sealing ring, and the throttling piece is located on the inner peripheral side of the ring seat and is detachably connected with the ring seat through the outer peripheral side of the throttling piece.

In one embodiment, one of the ring seat and the orifice member is provided with an engaging portion, and the other is provided with an engaging portion.

In one embodiment, one of the engaging portion or the engaging engagement portion is a groove, and the other is a protrusion.

In one embodiment, the ring seat is provided with an opening on the axial side surface, the groove is communicated with the opening in circumferential abutting mode, and a lug extends out of the outer peripheral surface of the throttling element and enters from the opening to be matched with the groove.

In one embodiment, the axial side of the ring seat is provided with a groove, and the protruding part is a boss axially extending from the side of the throttling part, and the boss is in interference fit with the groove.

In one embodiment, one of the engaging portion or the engaging engagement portion is a hole, and the other is a shaft.

In one embodiment, the throttle assembly includes a series of throttle plates of the same outer diameter and different inner bore diameters, any of which is replaceably attachable to the collar.

In one embodiment, the memory alloy is a high temperature shape memory alloy. In one embodiment, the pipe orifice assembly further comprises an auxiliary for mounting an orifice plate, the auxiliary providing a plurality of jaws, the orifice providing a plurality of holes that mate with the plurality of jaws. Further, the auxiliary member further includes a handle connecting the plurality of claws.

The sealing ring piece made of the shape memory alloy material can be heated to the shape recovery temperature after being used, so that the deformation of the sealing ring piece at the working environment temperature is eliminated, the sealing ring piece can be repeatedly used, and resources are effectively saved; meanwhile, the throttling element is detachably connected with the sealing ring element and is a standardized series element connected with the sealing ring element, the throttling element can be replaced, the inner apertures of different throttling elements are changed according to throttling requirements, and the outer diameter of the throttling elements can be unchanged.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:

fig. 1 is a schematic view of a general orifice plate.

Fig. 2 is a schematic view of a general C-type metal seal ring.

FIG. 3 is an exploded schematic view of the throttle assembly.

FIG. 4 is a schematic view of an assembly of the throttling assembly.

Fig. 5 is a cross-sectional view of a throttle assembly.

Fig. 6 is a schematic view of the auxiliary element in the assembly process.

FIG. 7 is a schematic view of the throttle assembly in an engaged state.

FIG. 8 is a top view of the throttle assembly.

Fig. 9A is a schematic view of a first embodiment of a throttle member.

Fig. 9B is a schematic view of a second embodiment of the orifice member.

Fig. 9C is a schematic view of a third embodiment of the orifice member.

Description of the main reference numerals

10 orifice plate

20 metal sealing ring

11 through hole

30 throttling element

32 inner hole

36 lug

40 seal ring

41 ring seat

42C type sealing ring

43 opening

44 groove

48 holes

50 auxiliary member

51 claw

52 handle

Detailed Description

The present invention is further described in the following description with reference to specific embodiments and the accompanying drawings, wherein the details are set forth in order to provide a thorough understanding of the present invention, but it is apparent that the present invention can be embodied in many other forms different from those described herein, and it will be readily appreciated by those skilled in the art that the present invention can be implemented in many different forms without departing from the spirit and scope of the invention. It is noted that these and other figures which follow are merely exemplary and not drawn to scale and should not be considered as limiting the scope of the invention as it is actually claimed.

As shown in fig. 3 to 5, the throttling assembly includes a throttling element 30 and a seal ring 40, the throttling element 30 is a throttling plate having an outer diameter and an inner bore diameter, and the inner bores 32 with different inner diameter sizes on the throttling plate determine the throttling flow rate. The sealing ring member 40 is made of shape memory alloy, and comprises a C-shaped sealing ring 42 and a ring seat 41, wherein the C-shaped sealing ring 42 is as shown in fig. 2, and provides a sealing surface which is in sealing fit with a pipeline, namely, the outer peripheral surface of the sealing ring member 40 is tightly attached to the pipeline, sealing is realized by means of the extrusion force of the pipeline, the throttling component is assembled with the pipeline component after being assembled, and the sealing surface of the pipeline joint at two ends is in contact with the outer peripheral surface of the C-shaped sealing ring 42 to form a certain pressure and deform the pressure, so that the sealing ring member is tightly attached to the sealing surface to play a sealing role. To achieve a good seal with the pipeline. The ring seat 41 has an inner circumferential side and an outer circumferential side, the outer circumferential side is connected to the C-ring 42, and the orifice 30 is located on the inner circumferential side of the ring seat 41 and detachably connected to the ring seat 41 via the outer circumferential side of the orifice 30. The orifice 30 and the ring holder 41 are detachably connected to each other by providing one of the ring holder 41 and the orifice 30 with an engaging portion and the other with an engaging portion.

In one embodiment, one of the engaging portion or the engaging engagement portion is a groove, and the other is a protrusion. One embodiment referring to fig. 3, an opening 43 is provided at one side of the ring seat 41, and the groove 44 is circumferentially communicated with the opening 43, that is, the groove 44 is communicated with the opening 43 and is arranged in the circumferential direction of the opening 43, forming a circumferential groove. The outer peripheral surface of the orifice member 30 extends beyond the lug 36, and the lug 36 enters from the opening 43 and engages the groove 44. During installation, the lugs 36 of the throttling element 30 are firstly matched with the openings 43, the throttling element 30 is preliminarily positioned to the ring seat 41, and then the throttling element 30 is rotated, so that the lugs 36 are rotated into the circumferentially distributed grooves 44 from the openings 43, and the outer circumferential surface of the throttling element 30 is attached to the inner circumferential surface of the ring seat 41, so that the throttling element 30 is fixed on the ring seat 41. When it is desired to remove the orifice 30 from the ring seat 41, the orifice 30 is rotated in the opposite direction, the lugs 36 are unscrewed from the slots 44 and into the openings 43, and then the orifice 30 is removed from the ring seat 41.

To assist in the mounting of the throttle 30 to the ring seat 41, the throttle assembly further comprises an assist 50 for fitting the throttle plate. Referring to fig. 6 and 7, the auxiliary member 50 is provided with a plurality of claws 51, the throttling member 30 is provided with a plurality of holes 48 matched with the plurality of claws 51, and when in use, the plurality of claws 51 of the auxiliary member 50 are respectively inserted into the corresponding holes 48 of the throttling member 30, so that the auxiliary member 50 is fixed with the throttling member 30. The auxiliary element 50 further comprises a handle 52 connected to the plurality of claws 51, and the handle 52 is manually rotated to easily and conveniently screw the lugs 36 from the openings 43 into the circumferentially distributed grooves 44, thereby completing the installation of the orifice element 30 and the ring holder 41. When it is desired to remove the orifice 30 from the ring seat 41, the handle 52 is rotated in the opposite direction, and the lugs 36 are screwed out of the slots 44 into the openings 43, completing the removal of the orifice 30 from the ring seat 41. By means of the auxiliary part 50, the throttle part 30 and the ring seat 41 can be conveniently and quickly assembled and disassembled, the assembling and disassembling time is saved, and the working efficiency is improved. The auxiliary fitting of the throttling element includes, but is not limited to, the above-mentioned auxiliary element, for example, the auxiliary element may further include a long rod having a first rod-like element and a second rod-like element but the first rod-like element and the second rod-like element are not coaxial, the first rod-like element is held by hand during the installation process, the second rod-like element is engaged with the hole 48 of the throttling element 30, and the first rod-like element is rotated, the second rod-like element can drive the throttling element 30 to rotate, so as to engage or disengage the lug 36 with or from the groove 44.

The orifice member 30 and the ring seat 41 include, but are not limited to, a detachable connection as shown in fig. 3 to 5. For example, a groove is formed on one side of the ring seat 41, the protrusion is a boss formed by axially extending the side surface of the throttle 30, the boss is in interference fit with the groove, at this time, the axial surface on one side of the throttle 30 is attached to the opposite axial surface of the ring seat 41, the outer peripheral surface of the throttle 30 is attached to the inner peripheral surface of the C-shaped sealing ring 42, and the throttle 30 is fixed to the ring seat 41. The boss can be preferably an elastic piece, and when the boss is positioned in the groove, the boss is subjected to extrusion force of the wall surface, and the boss is tightly matched with the groove by virtue of elastic restoring force after the extrusion. The installation or dismantlement can be respectively with the help of auxiliary fixtures, through knocking into the recess with the elasticity boss during the installation, push out the boss from the recess during the dismantlement, also can realize being connected of throttling element 30 and ring seat 41. The boss can be a wedge, the groove is a wedge groove matched with the wedge, and other shapes matched with the boss and the groove can be selected. For another example, the engaging portion or the engaging and engaging portion may be a hole on one side and a shaft on the other side, so that the throttle 30 and the ring seat 41 are detachably connected by means of hole-shaft engagement: set up the screw hole that link up on the ring seat 41, the round pin axle of taking the screw thread extends out to the side of throttle 30, realizes being connected with dismantling of ring seat 41 with throttle 30 through threaded connection.

When the throttling assembly is installed as shown in fig. 8, the outer peripheral surface of the C-shaped seal 42 is a sealing surface that sealingly engages the pipeline, and the throttling element 30 provides an inner bore 32 for throttling. The throttle assembly comprises a series of throttle plates of the same outer diameter and different inner bore diameters, any of which is replaceably attachable to the collar 41, with the change in throttle flow being achieved by adjusting the size of the inner bore 32. Through setting up the throttle plate as a series of standardized accessories with seal ring 40 complex, can satisfy user's multiple demand, need not to select suitable throttle plate in addition again, select the aperture of suitable size and realize standardized cooperation with seal ring 40 fast in the throttle plate of a plurality of sizes when needing to change the throttle flow, improve installation effectiveness. A series of throttle plates having the same outer diameter and different inner diameters can be seen in fig. 9A to 9C, where the outer diameters of the

throttle plates

301, 302 and 303 are all the same to be fixed to the ring seat 41 of the same seal ring 40, but the

throttle plates

301, 302 and 303 have inner bores 32 of different inner diameters for varying the throttle flow. The first inner hole 321 with a larger inner diameter size as shown in fig. 9A is used for meeting the requirement when the pipeline needs a larger throttling flow; a third inner hole 323 with a smaller inner diameter size as shown in fig. 9C, for meeting the requirement when the pipeline needs a smaller throttling flow; the second bore 322, shown in fig. 9B, has a medium inner diameter for meeting the requirement of a medium throttle flow. Fig. 9A to 9C are merely examples of a series of throttle plates, and in practical applications, more throttle plates may be provided to meet different throttle requirements, so as to improve the universality of the throttle assembly. If the throttling requirement is changed, the sealing element 30 on the sealing ring piece 40 can be replaced quickly, and the sealing element matched with the new sealing element 30 does not need to be selected independently, so that the working time is saved, and meanwhile, the working efficiency is greatly improved due to simple installation steps.

When the sealing member 30 needs to be replaced, the throttling assembly is taken out of the pipeline, the sealing member 30 is taken down from the seal ring member 40, the sealing member 30 with proper throttling flow is selected to be matched with the seal ring member, the throttling assembly is formed, and the throttling assembly is installed in the pipeline again. When the seal ring member 40 is taken out from the pipeline, the seal ring member 40 is often deformed due to factors such as high temperature, but the seal ring member 40 is made of shape memory alloy, the shape memory alloy has shape memory through thermoelasticity, martensitic phase change and inversion thereof, and the deformation can be eliminated through the rise of the external temperature after the deformation, and the seal ring member is restored to the original shape again. Therefore, after the seal ring member 40 made of the shape memory alloy is taken down from the pipeline, the seal ring member is heated to the shape recovery temperature by the heating equipment, at the moment, the deformed seal ring member 40 can be recovered to the original shape, and the seal ring member can be reused after being naturally cooled to the normal temperature state. And selecting and assembling the standard throttling element 30 matched with the sealing ring piece 40, and then installing the assembled throttling component to the pipeline joint, so that the reuse of the sealing ring piece 40 is realized, and a large amount of resources are saved.

The shape memory alloy is preferably a high-temperature shape memory alloy, the upper limit of the working temperature of the high-temperature shape memory alloy is higher than that of the common shape memory alloy, and the mechanical property of the high-temperature shape memory alloy can be kept under a certain high-temperature environment. Because the aircraft engine air pipeline comprises the high-temperature air flow channel and the low-temperature air flow channel, when the pipeline is located in a high-temperature environment, the deformation of the sealing element in the high-temperature environment is particularly serious, and therefore when the pipeline needing throttling is located in the high-temperature environment, the sealing ring piece 40 is made of a high-temperature shape memory alloy material, the original shape of the pipeline can be kept, the pipeline is not prone to plastic deformation, and the tolerance is improved. Meanwhile, the high-temperature shape memory alloy has stronger recovery property at the temperature higher than the shape recovery temperature, so that the sealing ring piece 40 can be quickly recovered to the original shape, the recovery time is saved, and the working efficiency is improved. Common shape memory alloys increase the phase transition point of the memory alloy in this way by adding Au, Pt or Pd, preferably of the TiNi-Pd family, to TiNi instead of Ni. The cold-drawing elongation of the TiNi-Pd series memory alloy reaches 7 percent, the TiNi-Pd series memory alloy has higher shape memory strain (5 to 6 percent), the shape recovery temperature can be increased by increasing the content of palladium so as to adapt to higher environmental temperature, the highest shape recovery temperature can reach 560 ℃ at present, and the TiNi-Pd series memory alloy is suitable for most pipelines of aeroengines.

Although the present invention has been disclosed in terms of the preferred embodiment, it is not intended to limit the invention, and variations and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. Therefore, any modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope defined by the claims of the present invention, unless the technical essence of the present invention departs from the content of the present invention.

Claims

1. A throttling assembly for throttling a conduit, comprising:

a throttle member (30) which is a throttle plate having an outer diameter and an inner bore diameter; and

the sealing ring piece (40) is made of shape memory alloy and comprises a C-shaped sealing ring (42) and a ring seat (41), the C-shaped sealing ring (42) provides a sealing surface matched with the pipeline in a sealing mode, the ring seat (41) is provided with an outer peripheral side and an inner peripheral side, the outer peripheral side is connected with the C-shaped sealing ring (42), and the throttling piece (30) is located on the inner peripheral side of the ring seat (41) and is detachably connected with the ring seat (41) through the outer peripheral side of the throttling piece (30).

2. A throttle assembly as set forth in claim 1 characterized in that one of said ring seat (41) and said throttle element (30) is provided with an engaging portion and the other is provided with an engaging portion engaged with said engaging portion.

3. The throttle assembly of claim 2, wherein one of the engaging portion or the engaging engagement portion is a groove and the other is a protrusion.

4. A choke assembly according to claim 3, characterized in that the ring seat (41) is provided with an opening (43) on its axial side, that the groove (44) communicates with the opening (43) in circumferential abutment, and that the choke element (30) has lugs (36) extending from its outer circumferential surface, the lugs (36) entering from the opening (43) and engaging the groove (44).

5. A throttle assembly as set forth in claim 4 characterized in that the axial side of the ring seat (41) is provided with a recess and the protrusion is an axially extending boss on the side of the throttle member (30), said boss being an interference fit with said recess.

6. The throttle assembly of claim 2, wherein one of the holes of the engaging portion or the engaging engagement portion is a shaft and the other is a shaft.

7. The throttle assembly of claim 1, characterized in that the throttle assembly comprises a series of throttle plates of the same outer diameter, different inner bore diameters, any of which is replaceably connectable to the collar (41).

8. The throttle assembly of claim 1, wherein the memory alloy is a high temperature shape memory alloy.

9. The throttle assembly of claim 1, characterized in that the throttle assembly further comprises an auxiliary member (50) for fitting a throttle plate, the auxiliary member (50) providing a plurality of claws (51), the throttle member (30) providing a plurality of holes (48) for cooperation with the plurality of claws (51).

10. The throttle assembly of claim 9, wherein the auxiliary member (50) further comprises a handle (52) connected to a plurality of jaws (51).