CN109211425B

CN109211425B - Air-cooled total temperature sensing part tail attachment assembly

Info

Publication number: CN109211425B
Application number: CN201811187176.7A
Authority: CN
Inventors: 袁帅; 李昊轩; 王�义; 耿欣; 张灿
Original assignee: AECC Shenyang Engine Research Institute
Current assignee: AECC Shenyang Engine Research Institute
Priority date: 2018-10-12
Filing date: 2018-10-12
Publication date: 2020-04-21
Anticipated expiration: 2038-10-12
Also published as: CN109211425A

Abstract

The application belongs to the field of high-temperature tests of aeroengines, and particularly relates to an air-cooled total-temperature sensing part tail attachment assembly. The method comprises the following steps: plugging, connecting pipes, round tables, pressing covers and compensation lines. According to the tail-attached component of the air-cooled total temperature sensing part, the wave-proof sleeve and the glass wire sleeve are separately fixed at the switching position of the thermocouple and the compensation wire, compared with the conventional glue dipping and bonding of the wave-proof sleeve and the glass wire sleeve, the process flow is simplified, the staggered layer operation of secondary glue sealing in a narrow space is omitted, most importantly, the insulation failure caused by short circuit of the wave-proof sleeve and the thermocouple or the compensation wire is avoided, and the fault hidden danger of the sensing part is eliminated; compared with the previous simple compression and bonding, the wedge-shaped extrusion fixing mode of the wave-proof sleeve is not easy to loosen and fall off, is more firm and durable, the wave-proof sleeve is directly connected with the shell of the sensed part, the continuity of the shielding layer is achieved, meanwhile, the direct bearing of the wave-proof sleeve is facilitated, the tail line is prevented from being broken due to the fact that the joint of the compensation line and the coupling wire is pulled due to stress, and the reliability of the tail attachment and the sensed part is improved.

Description

Air-cooled total temperature sensing part tail attachment assembly

Technical Field

The application belongs to the field of high-temperature tests of aeroengines, and particularly relates to an air-cooled total-temperature sensing part tail attachment assembly.

Background

In the research and development process of heat engines such as aero-engines or gas turbines, the technical problem of high-temperature testing is inevitable, and the total temperature pneumatic parameter testing of a high-temperature flow field is one of the high-temperature flow field testing. The air-cooled total temperature sensitive part is the first-selected technical means of the total temperature measurement of the current high-temperature runner, but the tail line is damaged if the field operation personnel are slightly careless in dismounting and mounting of the sensitive part in the using process, the contact failure is caused, and the tail glue removal of the sensitive part in the maintenance process is labor-consuming and time-consuming and also influences the attractiveness of the sensitive part.

Accordingly, a technical solution is desired to overcome or at least alleviate at least one of the above-mentioned drawbacks of the prior art.

Disclosure of Invention

The utility model aims at providing an air-cooled total temperature is felt portion and is attached subassembly to solve at least one problem that prior art exists.

The technical scheme of the application is as follows:

an air-cooled total temperature sensing portion tail attachment assembly, comprising:

the plug is fixedly connected with the main body of the sensed part, and a through hole is formed in the center of the plug;

one end of the connecting pipe is fixedly connected with the plug, and the other end of the connecting pipe is provided with an inner conical opening;

the circular truncated cone is of a conical annular structure, is matched and installed with the inner conical opening of the connecting pipe through an outer conical surface and is provided with an inner hole;

the gland is fixedly connected with the connecting pipe through the bottom of the gland, and a stepped through hole is formed in the gland;

the compensation line is connected with a main thermocouple of the sensing part led out by the plugged through hole and sequentially penetrates through the connecting pipe, the inner hole of the circular truncated cone and the gland.

Optionally, the compensation wire comprises a positive wire and a negative wire, and after a thin glass fiber sleeve is sleeved on the outer side of each wire respectively, a thick glass fiber sleeve is sleeved on the outer side of each wire to form a first wire bundle.

Optionally, the first wire harness is coiled in the junction tube and then penetrates out of the inner hole.

Optionally, sealant is poured at one end of the connecting pipe connected with the plug, the amount of the sealant poured can bury the switching point of the compensation wire and the main thermocouple of the sensitive part, and the thin glass wire sleeve and the thick glass wire sleeve are fixed.

Optionally, the inner hole is funnel-shaped, and the funnel wide mouth is at a side close to the body of the sensitive part.

Optionally, a step through hole is formed in the gland, a step fan-shaped column is arranged at the top of the gland, and a narrow section is arranged between the step through hole and the step fan-shaped column.

Optionally, still include and prevent ripples cover, prevent ripples cover establishes the outside of round platform to pass the ladder through-hole of gland, extend to the narrow section.

Optionally, a self-adhesive tape is arranged on the outer side of the first wire harness and bonded with the wave-proof sleeve to form a second wire harness.

Optionally, the second wire harness is spirally fastened to the narrow section by a metal wire, and a self-adhesive tape is disposed on the outer side of the metal wire.

Optionally, the heat-shrinkable tube is further included, and is used for extending the wave-proof sleeve and the thick glass fiber sleeve at the tail end of the second wiring harness to the outside of the heat-shrinkable tube.

The invention has at least the following beneficial technical effects:

the utility model provides an air-cooled total temperature is received sensing portion tail and is attached subassembly can improve the reliability that the tail attached and received sensing portion, and labour saving and time saving has higher economic value.

Drawings

FIG. 1 is a general schematic view of an air-cooled total temperature sensing portion attachment assembly of the present application;

FIG. 2 is an enlarged view of section I of FIG. 1;

FIG. 3 is a schematic view of a gland of the air cooled total temperature sensing portion attachment assembly of the present application;

FIG. 4 is a gland side view of the air cooled total temperature sensing portion tail attachment assembly of the present application;

wherein:

1-plugging; 2-pipe connection; 3-sealing glue; 4-a circular truncated cone; 41-inner hole; 5-pressing the cover; 51-cover bottom; 52-stepped through hole; 53-step sector column; 54-narrow section; 55-wide section; 6-a compensation line; 7-fine glass fiber sleeve; 8-thick glass wire sleeve; 9-wave-proof sleeve; 10-a wire; 11-self-adhesive tape; 12-heat shrinkable tube.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are a subset of the embodiments in the present application and not all embodiments in the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present application and for simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the scope of the present application.

The present application is described in further detail below with reference to fig. 1 to 4.

The application provides a subassembly is attached to air-cooled total temperature sensing portion tail, includes: the sealing device comprises a sealing plug 1, a connecting pipe 2, a circular truncated cone 4, a gland 5 and a compensation line 6.

The plug 1 is fixedly connected with the main body of the sensed part, and a through hole is arranged in the center of the plug 1; one end of the connecting pipe 2 is fixedly connected with the plug 1, and the other end is provided with an inner conical opening; the circular truncated cone 4 is of a conical annular structure and is matched with the inner conical opening of the connecting pipe 2 through an outer conical surface, and the circular truncated cone 4 is provided with an inner hole 41; the gland 5 is fixedly connected with the connecting pipe 2 through a cap bottom 51, and a stepped through hole 52 is formed in the gland 5; the compensation wire 6 is connected with a thermocouple of the main body of the sensitive part led out from the through hole of the plug 1, and the compensation wire 6 sequentially passes through the connecting pipe 2, the inner hole 41 of the circular truncated cone 4 and the gland 5.

Further, the plug 1 is a columnar metal block, the shape of the metal block is matched with the tail end of the sensed part, the plug 1 and the sensed part main body are preferably fixed through welding, a through hole in the center of the plug 1 is used for leading out a thermocouple of the sensed part main body, and a thermocouple protection tube and the plug 1 are welded and fixed.

The adapter tube 2 is a metal tube, and one end of the metal tube is fixedly connected with the plug 1 by welding, and advantageously, in the embodiment, the welding end face of the plug 1 is provided with a positioning convex ring to facilitate connection with the adapter tube 2. The other end of the connecting pipe 2 is provided with an inner conical opening, in the embodiment, the length of the inner conical opening is about 8mm, and the wall thickness of the inner conical opening is not less than 0.5 mm.

The round platform 4 is a metal block in a conical annular structure, one end of the round platform 4 is provided with an outer conical surface matched with an inner conical opening of the connecting pipe 2, the round platform 4 is inserted into the connecting pipe 2, the round platform 4 is provided with a funnel-shaped inner hole 41, and a funnel wide opening of the inner hole 41 is arranged at a thin head of the round platform 4.

The gland 5 is made of metal materials, the cover bottom 51 is buckled outside the connecting pipe 2, is in transition fit and is welded and fixed with the connecting pipe 2, and a certain pressing force is applied when the gland 5 is welded with the connecting pipe 2 so as to prevent the circular truncated cone 4 from loosening after welding. Inside being provided with ladder through-hole 52 of gland 5, the minimum diameter of ladder through-hole 52 is not less than the minimum diameter of round platform 4

hole

41, and 5 tops of gland are provided with the fan-shaped post 53 of ladder concentric with ladder through-hole 52, and the fan-shaped post 53 of ladder is wide narrow down, is the shape of falling L, is provided with narrow section 54 between ladder through-hole 52 to the fan-shaped post 53 of ladder, and the fan-shaped post 53 downside of ladder is provided with wide section 55. In one embodiment of the present application, as shown in fig. 4, the stepped through bore 52 has a minimum diameter of 6.2mm, the stepped scalloped post 53 has a wall thickness of about 4mm, the narrow section 54 is about 11.5mm long, the fan angle is about 45 °, the wide section 55 is about 2.5mm long, and the fan angle is about 130 °.

The compensation line 6 is connected with a main body of the sensitive part led out from the through hole of the plug 1 by a thermocouple, the compensation line 6 comprises a positive lead and a negative lead, the outer side of each lead is respectively sleeved with a thin glass wire sleeve 7, and then integrally sleeved with a thick glass wire sleeve 8 to form a first wire harness 81, the first wire harness 81 is wound in the connecting pipe 2 in a proper amount and then penetrates out of the inner hole 41, and the funnel-shaped inner hole 41 of the circular truncated cone 4 is favorable for the winding of the first wire harness 81. One end of the connecting pipe 2 connected with the plug 1 is poured with high-temperature-resistant insulating sealant 3, the glue pouring amount of the sealant 3 can bury the compensation wire 6 and the switching point of the main thermocouple of the sensitive part, and the thin glass wire sleeve 7 and the thick glass wire sleeve 8 are fixed, and meanwhile, the round table 4 is not interfered to be inserted into the connecting pipe 2.

The air-cooled total temperature sensing part tail attachment assembly further comprises an anti-wave sleeve 9, wherein the anti-wave sleeve 9 penetrates into one side of the outer conical surface of the circular truncated cone 4, penetrates out of the thin head of the circular truncated cone 4, is turned inwards to return to one side of the outer conical surface of the circular truncated cone 4, penetrates through the stepped through hole 52 of the gland 5 and is stroked to the tail end of the narrow section 54 of the gland 5. The outer side of the part of the first wire harness 81 covering the wave-proof sleeve 9 is also wound with a proper amount of self-adhesive tape 11, the first wire harness 81 covering the wave-proof sleeve 9 forms a second wire harness 91, the second wire harness 91 is spirally fastened with the narrow section 54 of the gland 5 by the metal wire 10, and the self-adhesive tape 11 is wound outside the metal wire 10.

The tail of the air-cooled total temperature sensing part further comprises a heat shrink tube 12, the heat shrink tube 12 hoops the wave-proof sleeve 9 and the thick glass fiber sleeve 8 at the tail end of the second wiring harness 91, and the compensation wire 6 and the thin glass fiber sleeve 7 extend out of the heat shrink tube 12 for wiring.

The utility model provides a gas-cooled total temperature is received sensing portion tail and is attached subassembly, will receive sensing portion end closure and draw forth the thermocouple through shutoff 1, loosen for preventing thermocouple and the 6 switching of compensation line, 2 interior pouring sealant 3 of takeover bury the adapter, simultaneously sealed end, thin glass silk cover 7, thick glass silk cover 8 is soaked in the sealed glue 3 in the takeover 2 and is bonded fixedly, to 6 insulation protection of compensation line, it is fixed with 2 wedge extrusion of takeover through round platform 4 to prevent ripples cover 9, second pencil 91 is binded with gland 5 support part, play effects such as shielding wear-resisting and tensile.

According to the tail-attached component of the air-cooled total temperature sensing part, the wave-proof sleeve and the glass wire sleeve are separately fixed at the switching position of the thermocouple and the compensation wire, compared with the conventional glue dipping and bonding of the wave-proof sleeve and the glass wire sleeve, the process flow is simplified, the staggered layer operation of secondary glue sealing in a narrow space is omitted, most importantly, the insulation failure caused by short circuit of the wave-proof sleeve and the thermocouple or the compensation wire is avoided, and the fault hidden danger of the sensing part is eliminated; prevent ripples cover wedge extrusion's fixed mode and in the past simple compress tightly with bond and compare difficult pine and take off, more firmly durable, prevent that ripples cover directly links with the portion casing that receives the sensation, accomplished the shielding layer continuous, still help preventing the direct load of ripples cover simultaneously, avoided the junction of compensation line and even silk to result in the tail-line to break because of the atress is strained, improved the reliability that the tail attached and received the sensation portion, labour saving and time saving has higher economic value.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An air-cooled total temperature sensing part tail-attached component is characterized by comprising:

the seal plug (1), the said seal plug (1) is fixedly connected with body of the part to be sensed, the centre of the said seal plug (1) has through holes;

one end of the connecting pipe (2) is fixedly connected with the plug (1), and the other end of the connecting pipe (2) is provided with an inner conical opening;

the round platform (4) is of a conical annular structure and is installed in a matching manner with an inner conical opening of the connecting pipe (2) through an outer conical surface, and an inner hole (41) is formed in the round platform (4);

the gland (5), the said gland (5) is connected with said connecting pipe (2) fixedly through the bottom of the cover (51), there are ladder through holes (52) in the said gland (5);

the compensation wire (6) is connected with a main body of the sensitive part led out from the through hole of the sealing plug (1) through a thermocouple, and the compensation wire (6) sequentially penetrates through the connecting pipe (2), the inner hole (41) of the circular truncated cone (4) and the gland (5);

the compensation wire (6) comprises a positive wire and a negative wire, a thin glass wire sleeve (7) is sleeved on the outer side of each wire respectively, then a thick glass wire sleeve (8) is integrally sleeved on the outer side of each wire to form a first wire bundle (81), sealant (3) is poured at one end, connected with the sealing plug (1), of the connecting pipe (2), the sealant (3) is poured in an amount capable of burying the connection point of the compensation wire (6) and the thermocouple of the main body of the sensitive part, and the thin glass wire sleeve (7) and the thick glass wire sleeve (8) are fixed;

prevent ripples cover (9), prevent ripples cover (9) cover and establish the outside of round platform (4), first pencil (81) outside set up self-adhesive tape (11) with prevent ripples cover (9) bonding constitution second pencil (91).

2. The air-cooled total temperature sensitive part tail assembly according to claim 1, wherein the first wire harness (81) is wound in the adapter tube (2) and then is led out from the inner hole (41).

3. The air-cooled total temperature sensitive part tail assembly according to claim 2, wherein the inner hole (41) is funnel-shaped, and a funnel wide mouth is arranged on one side close to the sensitive part main body.

4. The air-cooled total temperature sensitive part tail assembly according to claim 3, wherein a stepped fan-shaped column (53) is arranged at the top of the gland (5), and a narrow section (54) is arranged between the stepped through hole (52) and the stepped fan-shaped column (53).

5. The air-cooled total temperature sensitive tail assembly according to claim 4, wherein the wave-proof sleeve (9) extends to the narrow section (54) through a stepped through hole (52) of the gland (5).

6. The air-cooled total temperature sensitive part tail assembly according to claim 5, wherein the second wire harness (91) is spirally fastened to the narrow section (54) by a wire (10), and a self-adhesive tape (11) is provided outside the wire (10).

7. The air-cooled total temperature sensitive part tail assembly according to claim 6, further comprising a heat shrink tube (12) for hooping the wave-proof sleeve (9) and the thick glass fiber sleeve (8) at the tail end of the second harness (91), wherein the compensation wire (6) and the thin glass fiber sleeve (7) extend out of the heat shrink tube (12).