A turbine support wax injection protection device and method

Abstract

A turbine support wax pouring protection device and method, the wax pouring protection device comprises a disc-shaped pressing plate, a draw pin, a supporting rod, a sealing ring; the sealing ring is connected with the pressing plate through a plurality of connecting plates; the sealing ring is used for plugging the hole body of the upper annular wall plate; one end of the draw pin is provided with external threads, the end penetrates through the center of the pressing plate and is screwed with a nut; the other end of the draw pin is fixedly connected with the middle part of the supporting rod; the two ends of the supporting rod are used for abutting on the arc-shaped block of the turbine support; further comprising a first rubber ring, a second rubber ring and a cover; the first rubber ring is used for being press-connected between the upper mounting edge of the turbine support and the outer ring body, and the lower end surface of the first rubber ring abuts against the support plate of the turbine support; the second rubber ring is used for being press-connected between the lining plate of the turbine support and the outer ring body, and the upper end surface of the second rubber ring abuts against the support plate of the turbine support; the cover is used for buckling on the rectangular platform of the turbine support and plugging the hole on the rectangular platform.

Description

Technical Field

[0001] This invention relates to the field of aero-engine turbine support processing technology, and in particular to a turbine support wax injection protection device and method. Background Technology

[0002] Combination Figures 1 to 3 The diagram shows the structure of a turbine support in an aero-engine. The turbine support has a complex structure, and during manufacturing, metal filings and other debris can enter the turbine support's cavities through more than two hundred holes of varying sizes. The numerous irregularly shaped cavities within the turbine support easily trap metal filings and other debris. To prevent metal filings and other debris from entering the turbine support cavities during machining, the traditional process is wax filling.

[0003] Waxing is a traditional process. For example, patent application CN114055688A discloses a method and waxing device for enhancing the processing rigidity of heat insulation cylinders. Wax is used as a filler and works in conjunction with a rigid ring to improve the processing rigidity of the heat insulation cylinder, effectively reducing vibration and deformation during the precision machining process of parts.

[0004] Given the wax pouring process, for Figures 1 to 3 When waxing the turbine support shown, the cavity is treated by filling it with cloth strips and sealing all the holes on the turbine support that connect to the outside with adhesive tape. The entire process, from cleaning impurities from the solid wax → heating to melt the wax → filling with cloth strips → sealing the holes with adhesive tape → wax pouring → solidification → machining → heating to melt the wax again → cleaning up excess wax, cloth strips, and adhesive tape, takes 8-9 hours. During wax pouring, because the melted liquid wax is very hot, the adhesive tape often falls off easily after being heated, causing leakage while pouring. It is necessary to clean it thoroughly, re-apply the adhesive tape, and then pour the wax again, often repeating this process several times to complete the wax pouring, which is extremely inefficient. After machining the turbine support, the wax must be melted off and cleaned thoroughly, leaving no protection during subsequent assembly processes and transfers between processes. Iron filings and other debris can also enter the turbine support cavity during this period. Cleaning these debris later takes a long time and is extremely difficult. Summary of the Invention

[0005] The main objective of this invention is to provide a turbine support wax injection protection device and method to solve the above-mentioned technical problems.

[0006] To achieve the above object, in one aspect, the application provides a turbine support wax injection protection device, comprising a disc-shaped pressing plate, a draw bolt, a supporting rod, and a sealing ring; the sealing ring is connected with the pressing plate through a plurality of connecting plates; the sealing ring is used for pressing on the upper annular wall plate of the turbine support to block the hole of the upper annular wall plate; one end of the draw bolt is provided with external threads, the end penetrates through the center of the pressing plate and is screwed with a nut; the other end of the draw bolt is fixedly connected with the middle part of the supporting rod; the two ends of the supporting rod are used for abutting against the arc-shaped blocks of the turbine support; further comprising a first rubber ring, a second rubber ring, and a cover; the first rubber ring is used for pressing between the upper mounting edge of the turbine support and the outer ring body, and the lower end surface of the first rubber ring abuts against the support plate of the turbine support; the second rubber ring is used for pressing between the lining plate of the turbine support and the outer ring body, and the upper end surface of the second rubber ring abuts against the support plate of the turbine support; the cover is used for buckling on the rectangular platform of the turbine support and blocking the hole on the rectangular platform.

[0007] Preferably, the two ends of the supporting rod are provided with a stopper for clamping on the lower edge of the arc-shaped block of the turbine support.

[0008] Preferably, the sealing ring comprises a steel ring and a rubber sealing ring attached to the lower surface of the steel ring.

[0009] Preferably, the thickness of the rubber sealing ring is greater than or equal to 2 mm, the material of the steel ring is stainless steel, and the thickness of the steel ring is greater than or equal to 2 mm.

[0010] Preferably, a rubber skin is attached to the inner cavity bottom wall of the cover, and the thickness of the rubber skin is greater than or equal to 2 mm.

[0011] Preferably, four through holes are provided on the cover, and the cover is screw-connected with the four M6 threaded holes on the rectangular platform of the turbine support through the through holes.

[0012] Preferably, the cross section of the first rubber ring is in an inverted trapezoidal structure, and the cross section of the second rubber ring is in a trapezoidal structure.

[0013] Preferably, the thicknesses of the first rubber ring and the second rubber ring are both greater than or equal to 30 mm; the maximum width of the cross section of the first rubber ring is L1, which is at least 10 mm larger than the spacing between the upper mounting edge of the turbine support and the outer ring body; the maximum width of the cross section of the second rubber ring is L2, which is at least 10 mm larger than the spacing between the lining plate of the turbine support and the outer ring body.

[0014] In another aspect, the application further provides a turbine support wax injection protection method, which adopts the turbine support wax injection protection device described above and comprises the following steps:

[0015] Step S1: Insert the support rod into the central inner hole of the turbine support inner ring, so that both ends of the support rod abut against the arc-shaped block of the turbine support, and the pull stud extends vertically upward out of the central inner hole of the turbine support inner ring.

[0016] Step S2: Install the pressure plate above the inner ring of the turbine support, pass the threaded end of the rivet through the pressure plate, tighten the nut so that the sealing ring is pressed against the upper annular wall of the turbine support and the hole of the upper annular wall is sealed.

[0017] Step S3: Press the first rubber ring between the upper mounting edge of the turbine support and the outer ring body; rotate the turbine support 180 degrees, and then press the second rubber ring between the bushing of the turbine support and the outer ring body; the first rubber ring and the second rubber ring are distributed and abut against the upper and lower end faces of the support plate of the turbine support.

[0018] Step S4: Attach the cover to the rectangular platform supporting the turbine and seal the holes on the rectangular platform;

[0019] Step S5: Waxing. Melted liquid wax is poured into the holes in the lower annular wall of the turbine support. After the wax cools, the waxing protection device is removed, and the turbine support can then be machined.

[0020] Preferably, in step S2, when tightening the nut, the rubber sealing ring on the sealing ring is compressed and deformed by ≥1mm; in step S4, the cover is installed on the rectangular platform of the turbine support using screws, and the screws are tightened so that the rubber skin inside the cover is compressed and deformed by ≥1mm.

[0021] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0022] (1) In this invention, a sealing ring is used to seal the holes in the upper annular wall plate of the turbine support, and a first rubber ring and a second rubber ring are used to seal the cavity formed between adjacent support plates of the turbine support. A cover is used to seal the holes on the rectangular platform of the turbine support. Through the above sealing structure, the cavity of the turbine support is sealed to facilitate the wax filling operation. The elimination of the need for cloth strips and adhesive tape saves time spent on filling cloth strips, pasting adhesive tape, and cleaning cloth strips and adhesive tape after wax melting. This wax filling protection device can be used as a tooling for wax filling during turbine support production, and also for protection during assembly and inter-process handling after wax melting of the turbine support, preventing foreign matter from entering the turbine support cavity during this period. This wax filling protection device has good versatility and interchangeability, and is easy to install and remove. It can be used for wax filling and protection in the production of turbine supports for other models.

[0023] (2) In the present application, when sealing the strut plate cavity formed between adjacent strut plates of the turbine support, by designing the size ratio of the maximum cross-sectional width L1 of the first rubber ring and the maximum cross-sectional width L2 of the second rubber ring to the distance between the corresponding mounting positions to be at least 10 mm, after the first rubber ring and the second rubber ring are pressed in, the first rubber ring and the second rubber ring are expanded by relying on the elasticity of the rubber ring itself, without the need for other compression and fixation structures, so that the first rubber ring and the second rubber ring are convenient and fast to install and disassemble. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to the structures shown in these drawings without creative labor for those skilled in the art.

[0025] Figure 1 Structure diagram of turbine support in an aero-engine;

[0026] Figure 2 Structure diagram of turbine support in an aero-engine; Figure 1 Sectional view of A-A in the turbine support;

[0027] Figure 3 Structure diagram of turbine support in an aero-engine; Figure 2 View of B in the turbine support;

[0028] Figure 4 Structure diagram of the pressing plate, pull pin, supporting rod and sealing ring in the turbine support wax injection protection device provided by the present application;

[0029] Figure 5 Schematic diagram of the first rubber ring and the second rubber ring in the turbine support wax injection protection device provided by the present application;

[0030] Figure 6 Schematic diagram of the cover in the turbine support wax injection protection device provided by the present application;

[0031] Figure 7 Schematic diagram of the turbine support wax injection protection device cooperating with the turbine support.

[0032] BRIEF DESCRIPTION OF DRAWINGS: 100, inner ring body; 101, upper annular wall plate; 102, lower annular wall plate; 103, inner ring wall; 104, arc-shaped block; 105, upper mounting edge; 106, lining plate; 200, outer ring body; 300, strut plate; 301, rectangular platform; 302, threaded hole; 1, pressing plate; 2, pull pin; 3, supporting rod; 3a, stop opening; 4, sealing ring; 4a, steel ring; 4b, rubber sealing ring; 5, connecting plate; 6, nut; 7, first rubber ring; 8, second rubber ring; 9, cover; 9a, rubber skin; 9b, through hole. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present application.

[0034] It should be noted that all the direction indications (such as up, down, left, right, front, back, and the like) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, and the like between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the direction indications also change accordingly.

[0035] In addition, the descriptions of “first”, “second”, and the like in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined with “first”, “second” can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can realize it, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is also not within the protection scope required by the present application.

[0036] Combination Figures 1 to 3The structure diagram of the turbine support in the aero-engine is shown. The turbine support comprises an inner ring body 100 and an outer ring body 200, and a plurality of support plates 300 connecting the inner ring body 100 and the outer ring body 200. The inner ring body 100 is an integrated structure of an upper annular wall plate 101, a lower annular wall plate 102 and an inner ring wall 103. The inner ring wall 103 connects the upper annular wall plate 101 and the lower annular wall plate 102. The cross section of the inner ring body 100 is in the shape of a U-shaped groove, and the opening of the U-shaped groove faces the outer ring body 200. Different shaped hole bodies are arranged in the annular array on the upper annular wall plate 101 and the lower annular wall plate 102 respectively, and are connected to the U-shaped groove. A plurality of arc-shaped blocks 104 are integrally formed on the inner side of the inner ring wall 103. An upper mounting edge 105 is arranged on the upper surface of the upper annular wall plate 101 near the outer circle, and a backing plate 106 is arranged on the lower surface of the lower annular wall plate 102 near the outer circle. The support plate 300 is a hollow structure. A rectangular platform 301 is arranged at the connecting part of the support plate 300 and the outer ring body 200. A plurality of different types of hole bodies are arranged on the rectangular platform 301 and are connected to the inner cavity of the support plate 300. Four M6 threaded holes 302 are arranged on the rectangular platform 301. The U-shaped groove, the inner cavity of the support plate 300 and the support plate cavities formed between adjacent support plates 300 jointly constitute the cavity structure of the turbine support.

[0037] In combination Figures 4 to 6 The schematic diagram of a wax injection protection device for the turbine support provided by the embodiment is shown. The wax injection protection device comprises a disc-shaped pressing plate 1, a pull pin 2, a supporting rod 3, a sealing ring 4, the sealing ring 4 is connected with the pressing plate 1 through a plurality of connecting plates 5, the sealing ring 4 is used for being pressed on the upper annular wall plate 101 of the turbine support and plugging the hole body of the upper annular wall plate 101, one end of the pull pin 2 is provided with external threads, the end penetrates through the center of the pressing plate 1 and is screwed with a nut 6, the other end of the pull pin 2 is fixedly connected with the middle part of the supporting rod 3, the two ends of the supporting rod 3 are used for abutting on the arc-shaped blocks 104 of the turbine support, and the device further comprises a first rubber ring 7, a second rubber ring 8 and a cover 9, the first rubber ring 7 is used for being pressed between the upper mounting edge 105 of the turbine support and the outer ring body 200, and the lower end surface of the first rubber ring 7 abuts on the support plate 300 of the turbine support, the second rubber ring 8 is used for being pressed between the backing plate 106 of the turbine support and the outer ring body 200, and the upper end surface of the second rubber ring 8 abuts on the support plate 300 of the turbine support, and the cover 9 is used for being buckled on the rectangular platform 301 of the turbine support and plugging the hole bodies on the rectangular platform 301.

[0038] By using the above wax filling protection device, the sealing ring 4 is used to block the hole body of the upper annular wall plate 101 of the turbine support, the first rubber ring 7 and the second rubber ring 8 are used to seal the support plate cavity formed between the adjacent support plates 300 of the turbine support, and the cover 9 is used to block the hole on the rectangular platform 301 of the turbine support. The time for filling cloth strips and pasting adhesive tape is saved, and the time for cleaning the cloth strips and adhesive tape after wax filling is saved.

[0039] In combination Figure 4 As shown in the drawings, the supporting rod 3 is provided with a stopper 3a at both ends, which is used for clamping on the lower edge of the arc-shaped block 104 of the turbine support. The purpose of providing the stopper 3a is to better clamp the two ends of the supporting rod 3 on the arc-shaped block 104 of the turbine support, so as to avoid the radial movement of the supporting rod 3 when the nut 6 is tightened, and to avoid the situation that the supporting rod 3 slips off the arc-shaped block 104.

[0040] In combination Figure 4 As shown in the drawings, in order to make the sealing ring 4 have a better sealing effect on the hole body of the upper annular wall plate 101 of the turbine support, the sealing ring 4 is provided in the structure of a steel ring 4a and a rubber sealing ring 4b attached to the lower surface of the steel ring 4a. When the nut 6 is tightened, the tightening force of the nut 6 is controlled, and the compression amount of the rubber sealing ring 4b is controlled, so as to ensure the sealing effect.

[0041] In this embodiment, in order to ensure that the rubber sealing ring 4b has sufficient compression amount when compressed, the thickness of the rubber sealing ring 4b is ≥2mm; at the same time, in order to ensure the strength of the steel ring 4a, the material of the steel ring 4a is stainless steel, and the thickness of the steel ring 4a is ≥2mm.

[0042] In combination Figure 6 As shown in the drawings, the rubber skin 9a is attached to the inner cavity bottom wall of the cover 9, and four through holes 9b are provided on the cover 9, and the cover 9 is screw-connected with the four M6 threaded holes 302 on the rectangular platform 301 of the turbine support through the through holes 9b. When the cover 9 is installed, the rubber skin 9a is compressed by tightening the screw to block the hole on the rectangular platform 301. The compression amount of the rubber skin 9a is controlled to ensure the sealing effect. In order to ensure that the rubber skin 9a has sufficient compression amount when compressed, the thickness of the rubber skin 9a needs to be ≥2mm.

[0043] In combination Figure 5 As shown in the drawings, the cross section of the first rubber ring 7 is in an inverted trapezoidal structure, and the cross section of the second rubber ring 8 is in a trapezoidal structure. By setting the cross sections of the first rubber ring 7 and the second rubber ring 8 to be trapezoidal, the two side surfaces of the trapezoidal shape form guide surfaces, which facilitates the compression of the first rubber ring 7 and the second rubber ring 8 into the corresponding positions.

[0044] Furthermore, the thickness of both the first rubber ring 7 and the second rubber ring 8 is ≥30mm; the maximum cross-sectional width of the first rubber ring 7 is L1, which is at least 10mm larger than the distance between the upper mounting edge 105 of the turbine support and the outer ring 200; the maximum cross-sectional width of the second rubber ring 8 is L2, which is at least 10mm larger than the distance between the bushing 106 of the turbine support and the outer ring 200. After the first rubber ring 7 and the second rubber ring 8 are pressed in, they expand and tighten due to their own elasticity, without the need for other clamping and fixing structures, making the installation and removal of the first rubber ring 7 and the second rubber ring 8 convenient and quick.

[0045] Combination Figure 7 As shown, on the other hand, this embodiment also provides a method for wax injection protection of turbine supports, which uses the above-mentioned turbine support wax injection protection device and includes the following steps:

[0046] Step S1: Insert the support rod 3 into the central inner hole of the inner ring 100 of the turbine support, so that both ends of the support rod 3 abut against the arc-shaped block 104 of the turbine support, and the pull stud 2 extends vertically upward out of the central inner hole of the inner ring 100 of the turbine support.

[0047] Step S2: Install the pressure plate 1 above the inner ring 100 of the turbine support, pass the threaded end of the rivet 2 through the pressure plate 1, tighten the nut 6, so that the sealing ring 4 is pressed against the upper annular wall plate 101 of the turbine support, and the hole of the upper annular wall plate 101 is sealed.

[0048] Step S3: Press the first rubber ring 7 into the space between the upper mounting edge 105 of the turbine support and the outer ring 200; rotate the turbine support 180 degrees and press the second rubber ring 8 into the space between the liner 106 of the turbine support and the outer ring 200; the first rubber ring 7 and the second rubber ring 8 are distributed and abut against the upper and lower end faces of the support plate 300 of the turbine support.

[0049] Step S4: Attach the cover 9 to the rectangular platform 301 of the turbine support and seal the holes on the rectangular platform 301;

[0050] Step S5: Waxing. Melted liquid wax is poured into the holes on the lower annular wall plate 102 of the turbine support. After the wax cools, the waxing protection device is removed, and the turbine support can be machined.

[0051] To ensure a good seal, in step S2, when tightening the nut 6, the rubber sealing ring 4b on the sealing ring 4 is compressed and deformed by ≥1mm; in step S4, the cover 9 is installed on the rectangular platform 301 of the turbine support using screws, and the screws are tightened so that the rubber skin 9a inside the cover 9 is compressed and deformed by ≥1mm.

[0052] The above merely describes the preferred embodiments of the present application, and is not intended to limit the patent scope of the present application. Any equivalent structural changes made according to the content of the present application specification and drawings, or direct / indirect application in other related technical fields, are included in the patent protection scope of the present application.

Claims

1. A turbine support wax-filling protection device, characterized in that, Includes a disc-shaped pressure plate (1), a rivet (2), a support rod (3), and a sealing ring (4); The sealing ring (4) is connected to the pressure plate (1) by multiple connecting plates (5); the sealing ring (4) is used to press against the upper annular wall plate (101) of the turbine support to seal the holes of the upper annular wall plate (101); one end of the pull stud (2) is provided with an external thread, which passes through the center of the pressure plate (1) and is screwed with a nut (6); the other end of the pull stud (2) is fixedly connected to the middle of the support rod (3); the two ends of the support rod (3) are used to abut against the arc-shaped block (104) of the turbine support; It also includes a first rubber ring (7), a second rubber ring (8), and a cover (9); The first rubber ring (7) is used to press between the upper mounting edge (105) of the turbine support and the outer ring (200), and the lower end face of the first rubber ring (7) abuts against the support plate (300) of the turbine support. The second rubber ring (8) is used to press between the bushing (106) of the turbine support and the outer ring (200), and the upper end face of the second rubber ring (8) abuts against the support plate (300) of the turbine support. The cover (9) is used to fasten onto the rectangular platform (301) of the turbine support and to seal the holes on the rectangular platform (301).

2. The turbine support wax injection protection device as described in claim 1, characterized in that: Stops (3a) are provided at both ends of the support rod (3), which are used to engage with the lower edge of the arc-shaped block (104) of the turbine support.

3. The turbine support wax injection protection device as described in claim 1, characterized in that: The sealing ring (4) includes a steel ring (4a) and a rubber sealing ring (4b) attached to the lower surface of the steel ring (4a).

4. The turbine support wax injection protection device as described in claim 3, characterized in that: The thickness of the rubber sealing ring (4b) is ≥2mm, and the steel ring (4a) is made of stainless steel with a thickness ≥2mm.

5. The turbine support wax injection protection device as described in claim 1, characterized in that: A rubber sheet (9a) is attached to the bottom wall of the inner cavity of the cover (9), and the thickness of the rubber sheet (9a) is ≥2mm.

6. The turbine support wax injection protection device as described in claim 1, characterized in that: The cover (9) is provided with four through holes (9b), and the cover (9) is screwed to the four M6 threaded holes (302) on the rectangular platform (301) supported by the turbine using the through holes (9b).

7. The turbine support wax injection protection device as described in claim 1, characterized in that: The first rubber ring (7) has an inverted trapezoidal cross-section, and the second rubber ring (8) has a regular trapezoidal cross-section.

8. The turbine support wax injection protection device as described in claim 1, characterized in that: The thickness of both the first rubber ring (7) and the second rubber ring (8) is ≥30mm; The maximum width of the cross section of the first rubber ring (7) is L1, which is at least 10 mm larger than the distance between the upper mounting edge (105) of the turbine support and the outer ring (200). The maximum width of the cross section of the second rubber ring (8) is L2, which is at least 10 mm larger than the distance between the turbine support liner (106) and the outer ring (200).

9. A method for wax injection protection of turbine supports, characterized in that, The turbine support wax injection protection device according to any one of claims 1 to 8 includes the following steps: Step S1: Place the support rod (3) into the central inner hole of the inner ring body (100) of the turbine support, so that the two ends of the support rod (3) abut against the arc block (104) of the turbine support, and the pull stud (2) extends vertically upward out of the central inner hole of the inner ring body (100) of the turbine support. Step S2: Install the pressure plate (1) above the inner ring (100) of the turbine support, pass the threaded end of the rivet (2) through the pressure plate (1), tighten the nut (6) so that the sealing ring (4) is pressed on the upper annular wall plate (101) of the turbine support and the hole of the upper annular wall plate (101) is sealed. Step S3: Press the first rubber ring (7) between the upper mounting edge (105) and the outer ring (200) of the turbine support; rotate the turbine support 180 degrees, and then press the second rubber ring (8) between the bushing (106) and the outer ring (200) of the turbine support; the first rubber ring (7) and the second rubber ring (8) are distributed and abut against the upper and lower end faces of the support plate (300) of the turbine support; Step S4: Attach the cover (9) to the rectangular platform (301) of the turbine support and seal the holes on the rectangular platform (301); Step S5: Waxing. Melted liquid wax is poured into the holes on the lower annular wall plate (102) of the turbine support. After the wax cools, the waxing protection device is removed, and the turbine support can be machined.

10. The method for wax injection protection of turbine supports as described in claim 9, characterized in that: In step S2, when tightening the nut (6), the rubber sealing ring (4b) on the sealing ring (4) is compressed and deformed by ≥1mm; in step S4, the cover (9) is installed on the rectangular platform (301) of the turbine support using screws, and the screws are tightened so that the rubber skin (9a) inside the cover (9) is compressed and deformed by ≥1mm.

Images