Turbine blade mounting disc in sand blasting process

Abstract

The utility model relates to a steam turbine blade mounting disc in a sand blasting process, which comprises a mounting chassis, an annular inner reference convex ring is formed on the upper end surface of the inner ring of the mounting chassis, and an annular inner positioning concave platform is formed on the upper end surface of the mounting chassis on the outer side of the inner reference convex ring; an outer ring of the inner positioning concave table is provided with an annular outer positioning concave table which is sunken downwards, an annular outer reference convex ring is formed on the outer ring of the outer positioning concave table, an annular outer pressing plate is fixedly connected to the portion, on the outer side of the outer reference convex ring, of the mounting base plate, and the outer pressing plate abuts against the upper end face of the outer reference convex ring. The inner ring of the outer pressing plate is positioned above the outer positioning concave table; an annular inner pressing plate with a Z-shaped section is arranged above the inner reference convex ring, the annular inner pressing plate comprises an arc-shaped fixed pressing plate, and a movable pressing plate is inserted into a notch of the fixed pressing plate. The mounting disc is simple in structure, the steam turbine blade can be quickly mounted and connected to the mounting disc, and the surface sand blasting efficiency of the steam turbine blade can be improved.

Description

Technical fields:

[0001] This utility model relates to the technical field of carriers for surface treatment, and more specifically to a mounting plate for turbine blades in a sandblasting process. Background technology:

[0002] Steam turbine blades are a key component of a steam turbine, responsible for converting the thermal energy of steam into mechanical energy, directly affecting the turbine's efficiency and safety. The manufacturing process of steam turbine blades includes billet preparation, die forging, heat treatment, rough milling, laser cladding, straightening, flaw detection, and surface treatment. Among these, surface treatment often employs sandblasting to form a compressive stress layer on the blade surface, improving fatigue resistance. During sandblasting, the blades need to be arranged in a ring, such as... Figure 1 The mounting chassis 1 has, from the inside out, an inner reference convex ring 11, an inner positioning recess 12, an outer positioning recess 13, and an outer reference convex ring 14. The turbine blades 8 are positioned within the inner positioning recess 12 and the outer positioning recess 13. The root of the turbine blade 8 abuts against the upper surface of the inner reference convex ring 11, and the crown abuts against the inner wall of the outer reference convex ring 14. Then, annular inner and outer pressure plates press against the root and crown of the turbine blade 8 respectively, and are connected to the mounting... The chassis 1 is fixedly connected to the turbine blades 8 for positioning. The inner and outer pressure plates are generally fixed to the mounting chassis 1 with bolts. Therefore, multiple inner mounting screw holes 15 and outer mounting screw holes 16 are opened on the mounting chassis 1. In actual use, the inner and outer pressure plates need to be repeatedly installed and disassembled, which is quite troublesome. Moreover, sand is easy to enter into the inner mounting screw holes 15 or outer mounting screw holes 16, which affects the installation of the inner and outer pressure plates. Therefore, the mounting plate needs to be optimized to facilitate the installation and positioning of the turbine blades 8. Utility Model Content:

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a mounting plate for turbine blades in a sandblasting process. The mounting plate has a simple structure, enables the rapid installation and connection of turbine blades onto the mounting plate, and improves the efficiency of sandblasting treatment on the surface of turbine blades.

[0004] A mounting plate for turbine blades in a sandblasting process includes a mounting base. An annular inner reference convex ring is formed on the upper end face of the inner ring of the mounting base. An annular inner positioning recess is formed on the upper end face of the mounting base outside the inner reference convex ring. An outer positioning recess is formed on the outer ring of the inner positioning recess and is recessed downwards to form an annular shape. An annular outer reference convex ring is formed on the outer ring of the outer positioning recess. An annular outer pressure plate is fixed to the mounting base outside the outer reference convex ring. The outer pressure plate abuts against the upper end face of the outer reference convex ring. The inner ring of the outer pressure plate is located above the outer positioning recess.

[0005] The upper portion of the inner reference convex ring is provided with an annular inner pressing plate with a "Z" shaped cross section, which comprises a circular arc shaped fixed pressing plate, the inner ring of the fixed pressing plate is fixedly connected to the upper end surface of the mounting base, a movable pressing plate is inserted into the notch of the fixed pressing plate, the inner ring of the movable pressing plate abuts against the upper end surface of the mounting base and is formed with an inner supporting lug; the upper end surface of the inner ring of the fixed pressing plate is fixedly connected with a circular ring shaped limiting ring, the limiting ring abuts against the upper end surface of the inner ring of the movable pressing plate, the inner supporting lug of the movable pressing plate is screwed with an inner positioning bolt, and the end of the inner positioning bolt abuts against the mounting base.

[0006] Preferably, the outer pressing plate is composed of a plurality of circular arc shaped pressing plate units, the end portions of adjacent pressing plate units abut against each other.

[0007] The pressing plate unit comprises a horizontal plate abutting against the outer reference convex ring, the outer ring of the horizontal plate is formed with a clamping ring with a straight trapezoidal shaped cross section; a plurality of outer limiting rings with a parallelogram shaped cross section are fixedly connected to the mounting base outside the outer reference convex ring, the outer limiting ring and the outer reference convex ring are formed with an arc shaped clamping groove with a straight trapezoidal shaped cross section inside, and the clamping ring is inserted into the arc shaped clamping groove between the outer limiting ring and the outer reference convex ring.

[0008] Preferably, the outer limiting rings are uniformly distributed in a ring shape around the central axis of the mounting base, and the arc radian of the clamping ring is not greater than the arc radian between adjacent outer limiting rings.

[0009] All the clamping rings have at least one end located in the arc shaped clamping groove.

[0010] Preferably, an outer supporting lug is formed on one of the outer pressing plates, the outer supporting lug is screwed with an outer positioning bolt, and the end of the outer positioning bolt abuts against the mounting base.

[0011] Preferably, a plurality of threaded holes are formed on the mounting base inside the outer reference convex ring, a plurality of screws are inserted into the fixed pressing plate, and the screws are screwed and fixed in the mounting base of the mounting base.

[0012] Preferably, the central axis of the inner reference convex ring, the central axis of the outer reference convex ring, the central axis of the annular inner pressing plate and the central axis of the outer pressing plate are all on the same straight line.

[0013] The beneficial effects of the utility model lie in:

[0014] The mounting disc has a simple structure, can realize quick mounting and connection of the steam turbine blade on the mounting disc, and can improve the efficiency of sand blasting treatment on the surface of the steam turbine blade. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of the prior art sand blasting mounting disc;

[0016] Figure 2 It is a three-dimensional structure schematic view of the utility model;

[0017] Figure 3 It is a half cut structure schematic view of the utility model;

[0018] Figure 4 It is Figure 3 The partial enlarged structure schematic view of A in the middle.

[0019] In the drawing: 1, mounting base plate; 11, inner reference convex ring; 12, inner positioning concave table; 13, outer positioning concave table; 14, outer reference convex ring; 15, inner mounting screw hole; 16, outer mounting screw hole; 2, outer pressing plate; 21, pressing plate unit; 211, horizontal plate; 212, clamping ring; 213, outer supporting lug; 3, inner pressing plate; 31, fixed pressing plate; 32, movable pressing plate; 321, inner supporting lug; 4, limiting ring; 5, inner positioning bolt; 6, outer limiting ring; 7, outer positioning bolt; 8, steam turbine blade. Specific implementation:

[0020] Embodiment: see Figures 2 to 4 As shown in the drawing, a mounting disc of steam turbine blade in sand blasting process, including mounting base plate 1, the upper end face of the inner ring of mounting base plate 1 is formed with circular ring-shaped inner reference convex ring 11, the upper end face of mounting base plate 1 outside the inner reference convex ring 11 is formed with circular ring-shaped inner positioning concave table 12, the outer circle of inner positioning concave table 12 is formed with circular ring-shaped outer positioning concave table 13 which is concave downward, the outer circle of outer positioning concave table 13 is formed with circular ring-shaped outer reference convex ring 14, the outer side of outer reference convex ring 14 of mounting base plate 1 is fixedly connected with circular ring-shaped outer pressing plate 2, outer pressing plate 2 is abutted on the upper end face of outer reference convex ring 14, and the inner circle of outer pressing plate 2 is located above outer positioning concave table 13;

[0021] The upper side of inner reference convex ring 11 is provided with annular inner pressing plate 3 with the cross section of "Z" shape, and annular inner pressing plate 3 includes circular arc-shaped fixed pressing plate 31, the inner circle of fixed pressing plate 31 is fixedly connected to the upper end face of mounting base plate 1, movable pressing plate 32 is inserted into the slot of fixed pressing plate 31, and the two side walls of movable pressing plate 32 are parallel and abutted on the side walls of the end portions of fixed pressing plate 31 respectively; the inner circle of movable pressing plate 32 is abutted on the upper end face of mounting base plate 1 and is formed with inner supporting lug 321; the upper end face of the inner circle of fixed pressing plate 31 is fixedly connected with circular ring-shaped limiting ring 4, limiting ring 4 is abutted on the upper end face of the inner circle of movable pressing plate 32, inner positioning bolt 5 is screwed on the inner supporting lug 321 of movable pressing plate 32, and the tail end of inner positioning bolt 5 is pressed on mounting base plate 1.

[0022] The outer pressing plate 2 is composed of several circular arc-shaped pressing plate units 21, and the end portions of adjacent pressing plate units 21 are abutted together.

[0023] The pressure plate unit 21 includes a horizontal plate 211 abutting against the outer reference convex ring 14. The outer ring of the horizontal plate 211 is formed with a snap ring 212 with a cross-section of a right trapezoid. Several outer limiting rings 6 with a cross-section of a parallelogram are fixed to the mounting base 1 outside the outer reference convex ring 14. An arc-shaped slot a with a cross-section of a right trapezoid is formed in the outer limiting ring 6 and the outer reference convex ring 14. The snap ring 212 is inserted into the arc-shaped slot a between the outer limiting ring 6 and the outer reference convex ring 14. Based on the limiting of the snap ring 212, the pressure plate unit 21 can form a ring to limit the crown part of the turbine blade 8. The above-mentioned structure makes the outer pressure plate 2 easy to disassemble and install, which is beneficial for cleaning sand particles on the mounting plate.

[0024] The outer limiting rings 6 are evenly distributed in a ring around the central axis of the mounting chassis 1, and the arc radius of the locking ring 212 is not greater than the arc radius between adjacent outer limiting rings 6; that is, the prerequisite for the pressure plate unit 21 to enter the arc-shaped locking groove a.

[0025] At least one end of all the described snap rings 212 is located within the arc-shaped snap groove a.

[0026] A horizontal outer support lug 213 is formed on a section of the outer pressure plate 2. An outer positioning bolt 7 is screwed onto the outer support lug 213. The end of the outer positioning bolt 7 presses against the mounting base 1. The outer positioning bolt 7 can further limit the pressure plate unit 21 and prevent it from rotating.

[0027] The mounting base 1 on the inner side of the inner reference convex ring 11 has several threaded holes, and several screws are inserted into the pressure plate 31. The screws are screwed and fixed inside the mounting base 1. The pressure plate 31 can be disassembled.

[0028] The central axis of the inner reference convex ring 11, the central axis of the outer reference convex ring 14, the central axis of the annular inner pressure plate 3, and the central axis of the outer pressure plate 2 are all on the same straight line.

[0029] Working principle: This structure is a mounting plate for turbine blades in the sandblasting process. An outer pressure plate 2 is set on the outer side of the mounting plate, and an inner pressure plate 3 is set on the inner side. The inner pressure plate 3, together with the mounting base 1, positions and fixes the turbine blades 8 arranged in a ring. When installing the turbine blades 8, the moving pressure plate 32 on the inner pressure plate 3 can be moved to open the slot on the fixed pressure plate 31. The turbine blades 8 can then enter the arrangement position through the slot, driving the two ends of the turbine blades 8 to abut against the inner reference convex ring 11 and the outer reference convex ring 14 respectively. Then, the turbine blades 8 are moved to the lower side of the inner pressure plate 3 and the outer pressure plate 2. When the turbine blades 8 are fully distributed in a ring, the moving pressure plate 32 is moved to press against the inner pressure plate 32 and is positioned by tightening the inner positioning bolt 5, thus completing the loading of the turbine blades 8.

[0030] The embodiments described above are illustrative of the present invention and are not intended to limit the present invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be as set forth in the claims.

Claims

1. A mounting plate for turbine blades in a sandblasting process, comprising a mounting base (1), wherein an annular inner reference protrusion (11) is formed on the upper end face of the inner ring of the mounting base (1), an annular inner positioning recess (12) is formed on the upper end face of the mounting base (1) outside the inner reference protrusion (11), an outer ring of the inner positioning recess (12) is formed and recessed downwards to form an annular outer positioning recess (13), and an annular outer reference protrusion (14) is formed on the outer ring of the outer positioning recess (13), characterized in that: An annular outer pressure plate (2) is fixed on the mounting base (1) on the outer side of the outer reference convex ring (14). The outer pressure plate (2) abuts against the upper end face of the outer reference convex ring (14), and the inner ring of the outer pressure plate (2) is located above the outer positioning recess (13). Above the inner reference convex ring (11) is an annular inner pressure plate (3) with a "Z" shaped cross section. The annular inner pressure plate (3) includes an arc-shaped fixed pressure plate (31). The inner ring of the fixed pressure plate (31) is fixed to the upper end face of the mounting chassis (1). A dynamic pressure plate (32) is inserted into the slot of the fixed pressure plate (31). The inner ring of the dynamic pressure plate (32) abuts against the upper end face of the mounting chassis (1) and is formed with an inner support ear (321). A circular limiting ring (4) is fixed to the upper end face of the inner ring of the fixed pressure plate (31). The limiting ring (4) abuts against the upper end face of the inner ring of the dynamic pressure plate (32). An inner positioning bolt (5) is screwed onto the inner support ear (321) of the dynamic pressure plate (32). The end of the inner positioning bolt (5) presses against the mounting chassis (1).

2. The mounting plate for turbine blades in a sandblasting process according to claim 1, characterized in that: The outer pressure plate (2) is composed of several arc-shaped pressure plate units (21), with the ends of adjacent pressure plate units (21) abutting each other; The pressure plate unit (21) includes a horizontal plate (211) abutting against the outer reference convex ring (14). The outer ring of the horizontal plate (211) is formed with a snap ring (212) with a cross-section in the shape of a right trapezoid. Several outer limiting rings (6) with a cross-section in the shape of a parallelogram are fixed on the mounting base (1) outside the outer reference convex ring (14). The outer limiting ring (6) and the outer reference convex ring (14) are formed with an arc-shaped slot (a) with a cross-section in the shape of a right trapezoid. The snap ring (212) is inserted into the arc-shaped slot (a) between the outer limiting ring (6) and the outer reference convex ring (14).

3. The mounting plate for turbine blades in a sandblasting process according to claim 2, characterized in that: The outer limiting rings (6) are evenly distributed in a ring around the central axis of the mounting chassis (1), and the arc of the snap ring (212) is not greater than the arc between adjacent outer limiting rings (6). All of the described snap rings (212) have at least one end located within the arcuate snap groove (a).

4. The mounting plate for turbine blades in a sandblasting process according to claim 2, characterized in that: A horizontal outer support lug (213) is formed on a section of the outer pressure plate (2). An outer positioning bolt (7) is screwed onto the outer support lug (213), and the end of the outer positioning bolt (7) presses against the mounting base (1).

5. The mounting plate for turbine blades in a sandblasting process according to claim 1, characterized in that: The mounting base (1) on the inner side of the inner reference convex ring (11) has several threaded holes formed, and several screws are inserted into the pressure plate (31). The screws are screwed and fixed inside the mounting base (1) of the mounting base (1).

6. The mounting plate for turbine blades in a sandblasting process according to claim 1, characterized in that: The central axis of the inner reference convex ring (11), the central axis of the outer reference convex ring (14), the central axis of the inner annular pressure plate (3), and the central axis of the outer pressure plate (2) are all on the same straight line.

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