A stationary blade grinding tool

Abstract

A stationary blade grinding tool, which relates to a positioning tool, includes a main body, a clamping hook, a positioning mechanism and a limiting mechanism; a radially arranged clamping groove and two guide holes are processed on the main body, the clamping groove matches the inclined surface of the stationary blade, the two guide holes are respectively provided with clamping hooks, the clamping groove is arranged between the two guide holes, a radial positioning mechanism for controlling the up and down movement of the clamping hook is arranged in the main body below the guide holes, the clamping ends of the two clamping hooks match the clamped parts of the stationary blade, and a limiting mechanism for horizontally limiting the stationary blade is also installed on the main body. The invention has a simple structure, is easy to process, and is convenient for clamping and alignment during stationary blade grinding.

Description

Technical Field

[0001] The invention relates to a positioning tool, in particular to a stationary blade grinding tool. Background Art

[0002] Gas turbines can be widely used in many fields such as ship propulsion, natural gas pipeline transportation, and natural gas power generation. At present, the high-pressure 2nd stage stator blades of gas turbines are made of martensitic stainless steel, which is a difficult-to-process material. At the same time, when grinding the stator blades, due to the complex surface, they cannot be clamped directly. It is necessary to design special fixtures or other devices for grinding according to actual conditions. Summary of the invention

[0003] The present invention aims to overcome the deficiencies of the prior art and to provide a stationary blade grinding tool which is simple to operate, easy to process and convenient to clamp.

[0004] The technical solution of the present invention is:

[0005] A stationary blade grinding tool comprises a main body, a clamping hook, a positioning mechanism and a limiting mechanism; a radially arranged clamping groove and two guide holes are processed on the main body, the clamping groove matches the inclined surface of the stationary blade, clamping hooks are arranged in the two guide holes respectively, the clamping groove is arranged between the two guide holes, a radial positioning mechanism for controlling the up and down movement of the clamping hook is arranged in the main body below the guide holes, the clamping ends of the two clamping hooks cooperate with the clamped parts of the stationary blades, and a limiting mechanism for horizontally limiting the stationary blades is also installed on the main body.

[0006] Furthermore, the positioning mechanism includes a pull block and a preload member; a movable hole that penetrates the guide hole is also processed on the main body located below the guide hole, the pull block is arranged in the movable hole, the ends of the two clamping hooks are respectively rotatably connected to the pull block, and the knob on the pull block has a preload member, and the upper end of the preload member rests on the main body.

[0007] Furthermore, the limiting mechanism comprises a stopper, a limiting hole in the horizontal direction is processed on the main body, a movable stopper for horizontally limiting the stationary blade is arranged in the limiting hole, and the stopper is connected to the main body.

[0008] Compared with the prior art, the present invention has the following effects

[0009] The invention not only solves the problem of difficult clamping during stationary blade grinding, but also simplifies the machining and alignment work that the operator needs to do. It has the characteristics of easy use, simple operation, improved machining efficiency, reduced part deformation, simple structure and easy machining.

[0010] The present invention is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0012] Figure 2 is a cross-sectional view of the present invention;

[0013] Figure 3 A cross-sectional view of the main body;

[0014] Figure 4 for Figure 3 Side view of

[0015] Figure 5 for Figure 3 A top view of

[0016] Figure 6 It is the front view of the clamping hook;

[0017] Figure 7 for Figure 6 Side view of. DETAILED DESCRIPTION

[0018] See also Figure 1-Figure 2 As shown, a stationary blade grinding tool of the present embodiment includes a main body 1, a clamping hook 2, a positioning mechanism B and a limiting mechanism C; a radially arranged clamping groove 1-1 and two guide holes 1-2 are processed on the main body 1, the clamping groove 1-1 matches the stationary blade 8, and clamping hooks 2 are respectively arranged in the two guide holes 1-2, and the clamping groove 1-1 is arranged between the two guide holes 1-2. A radial positioning mechanism B for controlling the up and down movement of the clamping hook 2 is arranged in the main body 1 located below the guide holes 1-2, and the clamping ends of the two clamping hooks 2 cooperate with the clamped parts of the stationary blades. A limiting mechanism C for horizontally limiting the stationary blades is also installed on the main body 1.

[0019] like Figure 2 and Figure 3 As shown, the angle dimension of the clamping groove 1-1 is consistent with the angle dimension of the inclined surface of the stationary blade 8. The inclined surface of the stationary blade 8 is placed close to the main body 1, and the clamping hook 2 is driven downward by controlling the positioning mechanism B to clamp the upper surface of the stationary blade 8 and fix the stationary blade. During the grinding process, the stationary blade 8 is limited in the horizontal direction by the limiting mechanism C.

[0020] Furthermore, the positioning mechanism B includes a pull block 4 and a pre-tightening member 5; a movable hole 1-3 penetrating the guide hole 1-2 is also processed on the main body 1 located below the guide hole 1-2, the pull block 4 is arranged in the movable hole 1-3, the ends of the two clamping hooks 2 are respectively rotatably connected with the pull block 4, the knob on the pull block 4 has a pre-tightening member 5, and the upper end of the pre-tightening member 5 rests on the main body 1. The clamping groove 2 contacts the main body 1 through the guide hole 1-2 on the main body 1 and is limited to only move up and down.

[0021] like Figure 1 and Figure 5As shown, the limiting mechanism C includes a stopper 7, and a horizontal limiting hole 1-4 is processed on the main body 1. A movable stopper 7 for horizontally limiting the stationary blade is arranged in the limiting hole 1-4, and the stopper 7 is connected to the main body 1. Preferably, the stopper 7 is connected to the main body 1 by a screw 6. Preferably, as Figure 2 As shown, the pre-tightening member 5 is a bolt, and the end of the screw rod of the bolt is against the main body 1.

[0022] Since the end of the screw rod of the bolt rests on the main body 1, the pull block 4 is driven downward by rotating the bolt, and the clamping hook 2 connected to the pull block 4 moves downward at the same time, clamping the upper surface of the stationary blade 8 to fix the stationary blade 8. During the grinding process, the stop block 7 is used to limit the horizontal direction of the stationary blade.

[0023] In the above implementation, if Figure 3 As shown in FIG. 1 , the top opening of the pressing groove 1-1 is a conical opening, and the cone angle θ of the conical opening is 40°. This arrangement ensures that the stationary blade 8 can be placed in the pressing groove 1-1. Figure 6 As shown, the clamping end of the clamping hook 2 has an inclined surface, and the angle β between the inclined surface and the upper surface of the clamping hook 2 is 55°. The clamping hook 2 can be made into an L-shaped hook, and the guide hole 1-2 is also made into a hole matching the shape of the clamping hook 2. The end face of the short arm of the clamping hook 2 is processed with an inclined surface and a straight surface connected thereto, such as Figure 1 As shown, the angle between the inclined surface of the clamping hook 2 and the upper surface is 55°, which is conducive to the matching of the inclined surface with the inclined surface on the stationary blade 8, and facilitates the clamping and fixing of the stationary blade 8 by the two clamping hooks 2.

[0024] The present invention has been disclosed as above with preferred implementation cases, but it is not intended to limit the present invention. Any technician familiar with the profession, without departing from the scope of the technical solution of the present invention, makes any simple modifications, equivalent changes and modifications to the above implementation cases based on the technical essence of the present invention, which are still within the scope of the technical solution of the present invention.

Claims

1. A stationary blade grinding tool, characterized in that: It comprises a main body (1), a clamping hook (2), a positioning mechanism (B) and a limiting mechanism (C); the main body (1) is processed with a radially arranged clamping groove (1-1) and two guide holes (1-2); the clamping groove (1-1) matches the stationary blade (8); the two guide holes (1-2) are respectively provided with a clamping hook (2); the clamping hook (2) is an L-shaped hook; the guide holes (1-2) are holes matching the shape of the clamping hook (2); the end face of the short arm of the clamping hook (2) is processed with an inclined surface and a straight surface connected thereto; the angle (β) between the inclined surface and the upper surface of the clamping hook (2) is 55°; the clamping groove (1-1) is arranged between the two guide holes (1-2); the main body ( 1) is provided with a radial positioning mechanism (B) for controlling the up and down movement of the clamping hook (2), the positioning mechanism (B) comprising a pull block (4) and a pre-tightening member (5); a movable hole (1-3) which is connected to the guide hole (1-2) is also processed on the main body (1) located below the guide hole (1-2), the pull block (4) is arranged in the movable hole (1-3), the ends of the two clamping hooks (2) are respectively rotatably connected to the pull block (4), the knob on the pull block (4) is provided with a pre-tightening member (5), the pre-tightening member (5) is a bolt, the end of the screw rod of the bolt is pressed against the main body (1), the clamping ends of the two clamping hooks (2) are matched with the clamped part of the stationary blade (8), and a limiting mechanism (C) for horizontally limiting the stationary blade (8) is also installed on the main body (1).

2. According to claim 1, a stationary blade grinding tool is characterized in that: The limiting mechanism (C) comprises a stopper (7); a limiting hole (1-4) in the horizontal direction is processed on the main body (1); a movable stopper (7) for horizontally limiting the stationary blade (8) is arranged in the limiting hole (1-4); and the stopper (7) is connected to the main body (1).

3. According to claim 2, a stationary blade grinding tool is characterized in that: The stopper (7) is connected to the main body (1) via a screw (6).

4. A stationary blade grinding tool according to claim 3, characterized in that: The pressing hook (2) and the pulling block (4) are connected via a pin.

5. A stationary blade grinding tool according to claim 1, 3 or 4, characterized in that: The top opening of the pressing groove (1-1) is a conical opening, and the cone angle (θ) of the conical opening is 40°.

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