CN113894205A

CN113894205A - Blade plug flaring device and method

Info

Publication number: CN113894205A
Application number: CN202111156147.6A
Authority: CN
Inventors: 张军全; 温学兵; 杨柳川; 王冬; 冯永龙; 王震; 白变琴; 张小莉
Original assignee: AECC Aviation Power Co Ltd
Current assignee: AECC Aviation Power Co Ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-01-07
Anticipated expiration: 2041-09-29
Also published as: CN113894205B

Abstract

The invention discloses a device and a method for flaring a blade plug, wherein the device for flaring the blade plug comprises a bottom plate, a support, a guide plate, a guide sleeve and a punch, wherein the support and the support are both arranged on the bottom plate; one end of the guide plate is hinged with the top of the support, the guide sleeve is arranged at the other end of the guide plate and provided with a punch mounting hole, and the punch is arranged in the punch mounting hole and can freely slide along the punch mounting hole; and a fastening device for fixing the support and the guide plate relatively is connected between the support and the guide plate, and after the support and the guide plate are relatively fixed, the punch is opposite to the support. The flaring device for the blade plug can ensure that the plug is firmly installed and prevent the plug from falling off when the opening of the blade plug is flared.

Description

Blade plug flaring device and method

Technical Field

The invention relates to the technical field of flaring of a gas turbine blade process hole, in particular to a blade plug flaring device and method.

Background

The modern gas turbine requires continuous improvement of thrust-weight ratio and high performance, the most effective method for improving the performance and the thrust-weight ratio is to improve the temperature of a turbine inlet of the gas turbine, but the most effective method for improving the temperature of the turbine inlet is to improve the temperature of a turbine front inlet only by high-temperature alloy, and the most effective method for improving the temperature of the turbine inlet is to adopt a hollow cooling structure for a turbine high-pressure guide blade, so that the temperature born by the guide blade can be improved by 150-700 ℃. With the increase of the cooling temperature, the structure of the inner cavity of the blade is more and more complex, the shape of the ceramic core is more and more complex, the requirement that the residual mold core in the inner cavity of the blade is cleaned, the surface of a part cannot have corrosion depth exceeding the requirement, the mold core is removed by simple pressurization, the requirement of a high-quality product cannot be met, the method for solving the problem is to leave a process hole on the edge plate surface of the part during blank casting, and the process hole is blocked after the ceramic core is removed. The technical hole is plugged by the plug, and a special tool is required to expand the orifice of the plug so as to ensure that the plug is firmly installed and prevent the plug from falling off.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a blade plug flaring device and a blade plug flaring method.

The technical scheme adopted by the invention is as follows:

a flaring device for a blade plug comprises a bottom plate, a support, a guide plate, a guide sleeve and a punch, wherein the support and the support are arranged on the bottom plate; one end of the guide plate is hinged with the top of the support, the guide sleeve is arranged at the other end of the guide plate and provided with a punch mounting hole, and the punch is arranged in the punch mounting hole and can freely slide along the punch mounting hole; and a fastening device for fixing the support and the guide plate relatively is connected between the support and the guide plate, and after the support and the guide plate are relatively fixed, the punch is opposite to the support.

Preferably, the top of support is equipped with and supplies the baffle embedding and carry out spacing mounting groove to the baffle, and after support and baffle position relatively fixed, the baffle with the bottom of mounting groove is hugged closely.

Preferably, one end of the guide plate is hinged with the top of the support through a hinge shaft, and the axis of the hinge shaft is perpendicular to the axis of the support.

Preferably, the guide sleeve is a stepped shaft, the guide sleeve comprises a large-diameter section and a small-diameter section, a guide sleeve mounting hole connected with the small-diameter section in a positioning mode is formed in the guide plate, and the punch mounting hole is formed along the axis of the guide sleeve.

Preferably, the fastening device adopts a long square head screw, the long square head screw is in threaded connection with the support, a first long hole which can enable a long square head of the long square head screw to penetrate through is formed in the guide plate, the length direction of the first long hole is perpendicular to a rotating shaft of the guide plate, the width of the first long hole is larger than the diameter of the long square head screw and the width of the long square head, and the width of the first long hole is smaller than the length of the long square head screw.

Preferably, the punch is provided with a long groove along the length direction thereof, the side wall of the guide sleeve is in threaded connection with a limit screw, the limit screw penetrates through the side wall of the guide sleeve and extends into the long groove, and the diameter of the limit screw is smaller than the width of the long groove.

Preferably, the pillar comprises a pillar body, one end of the pillar body is positioned with the bottom plate through a positioning hole, a limiting plate is arranged on the pillar body, and the limiting plate is fixedly connected with the bottom plate through a screw.

Preferably, the guide sleeve is in clearance fit with the punch.

Preferably, the axes of the post and punch are coaxial or parallel.

The invention also provides a blade plug flaring method which is carried out by adopting the blade plug flaring device and comprises the following processes:

lifting the guide plate around the hinge part;

arranging a plug at the top of the support;

the blade is sleeved on the support column from the top of the support column downwards along the inner cavity of the blade, the plug is made to extend out of the fabrication hole of the blade edge plate, and the blade is only contacted with the plug;

the guide plate and the support are relatively fixed by a fastening device, and the punch abuts against the top of the plug at the moment;

and applying an acting force on the punch head to expand the top end opening of the plug head, enabling the plug head to be tightly matched with the blade flange plate, and finishing the flaring of the blade plug head. The invention has the following beneficial effects: according to the blade plug flaring device, the support column is arranged, the plug can be placed at the top of the support column, meanwhile, the support column structure can enable the support column to be conveniently inserted into the inner cavity of the blade, the upper end of the plug extends out of the fabrication hole of the blade edge plate, other structures on the blade are suspended and do not contact with other parts, and the other parts of the part can be prevented from being damaged in punching; one end of the guide plate is hinged with the top of the support, so that the blades can be conveniently placed and taken down by rotating the guide plate, the support and the guide plate can be relatively and fixedly connected by arranging the fastening device, the stability of the relative position is ensured, and the punching quality is ensured in the subsequent punching; the guide sleeve is arranged to stably guide the punch, the punch can freely slide along the punch mounting hole, resistance in punching can be reduced, and punching effect is guaranteed. The flaring device for the blade plug can ensure that the plug is firmly installed and prevent the plug from falling off when the opening of the blade plug is flared. Drawings

FIG. 1 is a front view of the construction of a blade plug flaring device of the present invention;

FIG. 2 is a top view of the construction of the blade plug flaring device of the present invention;

FIG. 3 is a front view of a base plate of the blade plug flaring device of the present invention;

FIG. 4 is a left side view of a bottom plate of the blade plug flaring device of the present invention;

FIG. 5 is a front view of a support post of the blade plug flaring device of the present invention;

FIG. 6 is a top view of a support post of the blade plug flaring device of the present invention;

FIG. 7 is a front view of a support of the blade plug flaring device of the present invention;

FIG. 8 is a top view of a support of the blade plug flaring device of the present invention;

FIG. 9 is a left side view of a support of the blade plug flaring device of the present invention;

FIG. 10 is a front view of a guide plate of the blade plug flaring device of the present invention;

FIG. 11 is a left side view of a guide plate of the blade plug flaring device of the present invention;

FIG. 12 is a front view of a guide sleeve of the blade plug flaring device of the present invention;

FIG. 13 is a left side view of a guide sleeve of the blade plug flaring device of the present invention;

FIG. 14 is a front view of a punch of the blade plug flaring device of the present invention;

FIG. 15 is a rectangular head screw view of the blade plug flaring device of the present invention;

FIG. 16 is a front view of a cotter pin of the blade plug flaring device of the present invention;

FIG. 17 is a front view of a hinge shaft of the blade plug flaring device of the present invention;

FIG. 18 is a front view of a knurled high-head screw of the blade plug flaring device of the present invention;

in the figure, 1-bottom plate, 1-1-pillar mounting hole, 1-2-support mounting hole, 2-pillar, 2-1-column, 2-2-limiting plate, 3-support, 3-1-mounting groove, 3-2-mounting bottom plate, 3-3-fixing hole, 3-4-first hinge shaft mounting hole, 4-guide plate, 4-1-first long hole, 4-2-guide sleeve mounting hole, 4-3-first limit screw mounting hole, 4-4-second hinge shaft mounting hole, 5-guide sleeve, 5-1-punch mounting hole, 5-2-second limit screw mounting hole, 5-3-small diameter section, 5-4-large diameter section, 6-punch, 6-1-long groove, 7-hexagon socket head cap screw, 8-long square head screw, 9-cotter pin, 10-flat washer, 11-hinge axis, 11-1-cotter pin mounting hole and 12-knurled high head screw.

Detailed Description

The invention is further described below with reference to the figures and examples.

Referring to fig. 1-4, the flaring device for the blade plug comprises a bottom plate 1, a support 2, a support 3, a guide plate 4, a guide sleeve 5 and a punch 6, wherein the support 2 and the support 3 are both arranged on the bottom plate 1; one end of the guide plate 4 is hinged with the top of the support 3, the guide sleeve 5 is arranged at the other end of the guide plate 4, the guide sleeve 5 is provided with a punch mounting hole 5-1, and the punch 6 is arranged in the punch mounting hole 5-1 and can freely slide along the punch mounting hole 5-1; the fixing device is used for fixing the support 3 and the guide plate 4 relatively, when the support 3 and the guide plate 4 are fixed relatively, the punch 6 is opposite to the pillar 2, the design of the structure can ensure that the punch 6 and the pillar 2 only apply force to the plug, so that the plug deforms and is tightly matched with the flange plate, other parts of the blade are not in contact with other parts, and the deformation of other parts during the process of punching the plug can be prevented. Before flaring of the blade plug, the guide plate is lifted around the hinge part, the plug is placed at the top end of the strut, and the bottom surface of the plug is ensured to be in contact with the plane of the top end of the strut; sleeving the support into the inner cavity of the blade to ensure that the plug extends out of the technical hole of the blade edge plate; after the blades are stably installed, the guide plate rotates around the hinge part and keeps a horizontal state, and the support 3 and the guide plate 4 are fastened by using the fastening device to ensure that the support plate is pressed; and properly adjusting the relative position of the blades, propping the punch head against the edge of the plug hole, knocking the top end of the punch head by using a wood hammer, expanding the port at the top end of the plug, and tightly matching with the edge plate to ensure that the plug does not fall off.

Referring to fig. 2, 7-9, as a preferred embodiment of the present invention, the top of the support 3 is provided with an installation groove 3-1 for the guide plate 4 to be inserted into and limit the guide plate 4, and after the support 3 and the guide plate 4 are relatively fixed, the guide plate 4 is tightly attached to the bottom of the installation groove 3-1. In general, the guide plate 4 and the installation groove 3-1 are provided with a clearance fit in the width direction, so that the position of the guide plate 4 can be secured.

Referring to fig. 1, 2, 9, 11, 16 and 17, as a preferred embodiment of the present invention, one end of the guide plate 4 is hinged to the top of the support 3 by a hinge shaft 11, and the axis of the hinge shaft 11 is perpendicular to the axis of the support 2. The hinge shaft 11 passes through a first hinge shaft mounting hole 3-4 on the support 3 and a second hinge shaft mounting hole 4-4 on the guide plate 4, so that the guide plate 4 is connected with the support 3, the end of the hinge shaft 11 is provided with a gasket 10 and the hinge shaft 11 is limited by a cotter pin 9 passing through the cotter pin mounting hole 11-1.

Referring to fig. 1, 2, 12 and 13, the guide sleeve 5 is a stepped shaft, the guide sleeve 5 includes a large diameter section 5-1 and a small diameter section 5-3, a guide sleeve mounting hole 4-2 for positioning and connecting with the small diameter section 5-3 is formed on the guide plate 4, and a punch mounting hole 5-1 is formed along the axis of the guide sleeve 5. The guide sleeve 5 is designed to be a stepped shaft in shape and can be limited by a step between the large-diameter section 5-1 and the small-diameter section 5-3.

Referring to fig. 1, 2, 10 and 15, the fastening device adopts a rectangular head screw 8, the rectangular head screw 8 is in threaded connection with the support 3, the guide plate 4 is provided with a first long hole 4-1 through which a rectangular head of the rectangular head screw 8 can pass, the length direction of the first long hole 4-1 is perpendicular to the rotating shaft of the guide plate 4, the width of the first long hole 4-1 is larger than the diameter of the screw rod of the rectangular head screw 8 and the width of the rectangular head, and the width of the first long hole 4-1 is smaller than the length of the rectangular head screw 8. The long square head screw 8 can be always connected to the first limit screw mounting hole 4-3 on the support 3 without being completely detached every time, so that the operation flow is reduced, and the use is more convenient.

Referring to fig. 14, as a preferred embodiment of the present invention, the punch 6 is provided with a long groove 6-1 along the length direction thereof, the side wall of the guide sleeve 5 is threadedly connected with a limit screw, the limit screw penetrates through the side wall of the guide sleeve 5 and extends into the long groove 6-1, and the diameter of the limit screw is smaller than the width of the long groove 6-1. The design of this structure can utilize limit screw to carry out extreme position's spacing to drift 6, can also guarantee drift 6's free removal simultaneously, guarantees that the process of punching a hole can go on smoothly.

Referring to fig. 1, 5 and 6, the pillar 2 includes a column body 2-1, one end of the column body 2-1 is positioned with the bottom plate 1 through a positioning hole, the column body 2-1 is provided with a limiting plate 2-2, and the limiting plate 2-2 is fixedly connected with the bottom plate 1 through a screw. The limiting plates 2-2 limit the whole column body on one hand and can reduce the height of the whole column body on the other hand

As a preferred embodiment of the invention, the guide sleeve 5 and the punch are in clearance fit.

Referring to fig. 1 and 2, as a preferred embodiment of the present invention, the axes of the pillar 2 and the punch 6 are coaxial or parallel.

Examples

As shown in fig. 1 to 18, when the device is used for reaming a guide blade flange plate plug of a turbine of a certain type of gas turbine, a part (i.e., a blade) is clamped on the blade plug flaring device of the embodiment. The clamping steps are as follows: before a part is clamped, a guide sleeve 5 is sleeved on a punch 6, the guide sleeve 5 is assembled in a round hole (namely a guide sleeve mounting hole 4-2) in the front section of a guide plate 4, a positioning hole (namely a second limit screw mounting hole 5-2) in the hole wall of the guide sleeve 5 is ensured to be coaxial with a threaded hole (namely a first limit screw mounting hole 4-3) in the side surface of the guide plate 4, a groove (namely a long groove 6-1) in the punch 6 is adjusted to be level with a threaded hole (namely a second limit screw mounting hole 5-2) in the guide sleeve 5, a knurled high-head screw 12 is mounted on the first limit screw mounting hole 4-3 of the guide plate 4, the knurled high-head screw 12 is screwed down to enable the head of the knurled high-head screw to extend into the long groove 6-1 in the punch 6, and the punch 6 can be enabled to move up and down flexibly. Lifting the guide plate 4 around the hinge shaft 11, and sleeving the blade on the column 2-1 of the strut 2 along the front cavity of the blade to ensure that the bottom of the inner cavity of the blade is attached to the top surface of the column 2-1; the guide plate 4 is horizontally and stably placed around the hinge shaft 11, and the long square head screw 8 is rotated, so that the long square head screw 8 is perpendicular to the direction of the first long hole 4-1 on the guide plate 4, and the guide plate 4 is locked with the support 3. And (3) properly adjusting the position of the plug to be in contact with the conical surface at the top end (the lower end shown in figure 1) of the punch 6, and knocking the upper end of the punch 6 by using a tool to complete the reaming of the part.

Wherein, the pillar 2 and the support 3 are fixed on the bottom plate 1 by an inner hexagonal socket head cap screw 7, a guide sleeve mounting hole 4-2 on the guide plate 4 is aligned with the top end of the pillar 2, the guide plate 4 is connected with the support 3 by a hinge shaft 11, a flat gasket 10 is further arranged on the hinge shaft 11, and a cotter pin 9 passes through a cotter pin mounting hole 11-1 of the hinge shaft 11; the front end of the hinge shaft 11 is in a conical structure (namely, a chamfer structure is made), so that the assembly is convenient.

The blade plug flaring device can be used for plugging a process hole of a guide blade edge plate of a high-pressure turbine of a gas turbine by using a plug for positioning and mounting, and solves the problem that other parts of the guide blade are damaged in the flaring process. When the flaring of the plug is carried out, only the bottom of the plug is contacted with the top of the device strut, the rest parts of the blade are in a suspended state, the plug bears all force during operation, the better flaring is ensured, and the rest parts are in a suspended state and are free from the action of force.

The invention has the advantages that: the device combines the part structural feature to design, simple structure, convenient operation. When the device is used for positioning, clamping and flaring the plug, only the bottom plane of the plug is in contact with the upper end face of the support column, and other parts of the part are in a suspended state, so that only the plug part is stressed in the machining process, and the damage to other parts of the part can be avoided; the guide plate can rotate around the hinge shaft, so that the auxiliary work of blade clamping and dismounting is greatly reduced, and the processing efficiency is improved; a groove with the width of 6mm is designed in the middle of the side wall of the punch and is matched with a knurled high-head screw for use, so that the downward movement displacement of the punch is controlled, and the punch is prevented from falling off when the guide plate is lifted; the rectangular head screw has certain angles (namely chamfers) on two sides, the pressing force is gradually increased when the guide plate is locked, and the operation is convenient. The whole device is compact in structure and low in manufacturing cost, and meanwhile, the device can be used for plug flaring work of blades with other similar structures.

Claims

1. A blade plug flaring device is characterized by comprising a bottom plate (1), a support (2), a support (3), a guide plate (4), a guide sleeve (5) and a punch (6), wherein the support (2) and the support (3) are both arranged on the bottom plate (1); one end of the guide plate (4) is hinged with the top of the support (3), the guide sleeve (5) is arranged at the other end of the guide plate (4), the guide sleeve (5) is provided with a punch mounting hole (5-1), and the punch (6) is arranged in the punch mounting hole (5-1) and can freely slide along the punch mounting hole (5-1); and a fastening device for fixing the position of the support (3) and the guide plate (4) relatively is connected between the support (3) and the guide plate (4), and after the position of the support (3) and the position of the guide plate (4) are relatively fixed, the punch (6) is right opposite to the support (2).

2. The flaring device for the plug of the blade as claimed in claim 1, wherein the top of the support (3) is provided with a mounting groove (3-1) for the guide plate (4) to be embedded and for limiting the guide plate (4), and when the support (3) and the guide plate (4) are relatively fixed in position, the guide plate (4) is tightly attached to the bottom of the mounting groove (3-1).

3. A blade end cap flaring device according to claim 1, characterized in that one end of the guide plate (4) is hinged to the top of the support (3) by means of a hinge axis (11), the axis of the hinge axis (11) being perpendicular to the axis of the post (2).

4. The flaring device for the blade plugs as claimed in claim 1, wherein the guide sleeve (5) is shaped as a stepped shaft, the guide sleeve (5) comprises a large-diameter section (5-1) and a small-diameter section (5-3), a guide sleeve mounting hole (4-2) which is connected with the small-diameter section (5-3) in a positioning manner is formed in the guide plate (4), and the punch mounting hole (5-1) is formed along the axis of the guide sleeve (5).

5. The blade plug flaring device according to claim 1, wherein the fastening device adopts a rectangular head screw (8), the rectangular head screw (8) is in threaded connection with the support (3), a first long hole (4-1) through which a rectangular head of the rectangular head screw (8) can pass is formed in the guide plate (4), the length direction of the first long hole (4-1) is perpendicular to the rotating shaft of the guide plate (4), the width of the first long hole (4-1) is greater than the diameter of the screw rod of the rectangular head screw (8) and the width of the rectangular head, and the width of the first long hole (4-1) is less than the length of the rectangular head screw (8).

6. The flaring device for the blade plugs according to claim 1, wherein the punch (6) is provided with a long groove (6-1) along the length direction thereof, the side wall of the guide sleeve (5) is in threaded connection with a limit screw, the limit screw penetrates through the side wall of the guide sleeve (5) and extends into the long groove (6-1), and the diameter of the limit screw is smaller than the width of the long groove (6-1).

7. The flaring device for the blade plugs according to claim 1, wherein the support column (2) comprises a column body (2-1), one end of the column body (2-1) is positioned with the bottom plate (1) through a positioning hole, a limiting plate (2-2) is arranged on the column body (2-1), and the limiting plate (2-2) is fixedly connected with the bottom plate (1) through a screw.

8. The device for flaring blade plugs as claimed in claim 1, wherein the guide sleeve (5) is in clearance fit with the punch.

9. A blade plug flaring device according to claim 1, characterized in that the axes of the strut (2) and the punch (6) are coaxial or parallel.

10. A method for flaring a blade plug, which is characterized by being carried out by adopting the device for flaring a blade plug of any one of claims 1 to 9, and comprising the following steps of:

lifting the guide plate (4) around the hinged part;

arranging a plug at the top of the support column (2);

the blade is sleeved on the support column (2) from the top of the support column (2) downwards along the inner cavity of the blade, the plug is made to extend out of the fabrication hole of the blade edge plate, and the blade is only contacted with the plug;

the guide plate (4) and the support (3) are relatively fixed by a fastening device, and the punch (6) is abutted against the top of the plug at the moment;

and applying acting force on the punch (6) to expand the top end opening of the plug, enabling the plug to be tightly matched with the blade flange plate, and finishing flaring of the blade plug.