Low-speed blade top grinding tool for rotor blade

Abstract

According to the low-speed blade top grinding tool for the rotor blade, the first clamping tool and the second clamping tool are arranged on the two sides of the wheel disc, and the first clamping tool and the second clamping tool clamp and fix the relative position of the wheel disc through the clamping force output unit; each locking part comprises a first side locking assembly and a second side locking assembly which are respectively provided with two output ends, and a rotor blade air inlet channel and a rotor blade air outlet channel which respectively extend into the space between the rotor blade and the wheel disc from two sides in the axial direction; each rotor blade is supported to the rotor blade through the four output ends of the first side locking assembly and the second side locking assembly, so that expansion of the rotor blade is achieved in cooperation with the wheel disc, all the freedom degrees of the rotor blade are limited, blade top grinding can be achieved at a low speed, and the grinding efficiency is improved. The problems that an existing rotor blade is low in low-speed grinding production efficiency and unstable in quality are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of rotor blades, and in particular relates to a low-speed blade tip grinding tool for rotor blades. Background Art

[0002] The radial clearance of the rotor blades directly affects the performance of the gas turbine. In order to ensure the tip clearance, the rotor blades need to be ground after assembly. At present, most aircraft engines use high-speed tip grinding equipment to grind the rotor blades. As described in patent CN101722459B, due to high-speed grinding, dynamic balancing is required first, and then the rotor blade assembly is fixed to a special grinding equipment through a special fixture for tip grinding. During the grinding process, it is necessary to ensure that the rotor is always in a stretched state. This method is extremely professional, highly dependent on high-precision equipment, and very expensive, and it is difficult to apply it universally.

[0003] Of course, there is also a simple low-speed grinding method. In order to grind the rotor blades under tension, each rotor blade is installed on a simulation disk, and the rotor blades are lifted up one by one with screws. Ordinary modified equipment is used to grind each level of simulation disks at low speed. This method has low production efficiency, is limited by the tooling accuracy of the simulation disk, has unstable quality, and is difficult to meet design requirements. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a low-speed blade tip grinding tool for rotor blades, so as to solve the problems of low production efficiency and unstable quality of the existing low-speed grinding of rotor blades.

[0005] To solve the above problems, the technical solution of the utility model is:

[0006] The utility model discloses a low-speed blade tip grinding tool for rotor blades, wherein a plurality of rotor blades are installed into the tenon groove of a wheel disc through the tenon teeth thereon, a preset taper is provided between the tenon groove and the axis of the wheel disc, and a rotor blade inlet passage and a rotor blade outlet passage inclined to the axis of the wheel disc are formed between the edge plate of each rotor blade and the outer diameter of the wheel disc, comprising:

[0007] A first clamping fixture and a second clamping fixture, wherein the clamping surfaces of the first clamping fixture and the second clamping fixture are respectively used to be attached to two side surfaces in the axial direction of the wheel disc;

[0008] A clamping force output assembly, connected to the first clamping fixture and the second clamping fixture, and used to output a clamping force toward the wheel disc to the first clamping fixture and the second clamping fixture;

[0009] The direction from the first clamping fixture to the wheel disc along the wheel disc axis is set as the first direction, and the direction from the second clamping fixture to the wheel disc along the wheel disc axis is set as the second direction;

[0010] A plurality of locking parts corresponding to the rotor blades one by one; the locking parts include a first side locking assembly and a second side locking assembly;

[0011] The first side locking assembly is disposed on the first clamping fixture, and two output ends of the first side locking assembly are arranged to extend into the rotor blade inlet passage and the rotor blade outlet passage of the corresponding rotor blade respectively along the first direction and output a tightening force to the corresponding rotor blade;

[0012] The second side locking assembly is disposed on the second clamping tool, and two output ends of the second side locking assembly are arranged to extend into the rotor blade inlet channel and the rotor blade outlet channel of the corresponding rotor blade respectively along the second direction and output the clamping force to the corresponding rotor blade.

[0013] The utility model is used for the low-speed blade tip grinding tool for rotor blades, wherein the first clamping tool and the second clamping tool are respectively provided with a first through hole and a second through hole corresponding to the shaft hole of the wheel disc;

[0014] The clamping force output assembly is arranged to pass through the first through hole, the shaft hole of the wheel disc and the second through hole.

[0015] The utility model is used for the low-speed blade tip grinding tool for rotor blades, wherein the clamping force output assembly comprises a central pull rod and a locking nut;

[0016] The central pull rod comprises an abutment section, an intermediate section and a threaded section connected in sequence;

[0017] The middle section is penetrated through the first through hole, the axial hole of the wheel disc and the second through hole; the abutment section is used to abut against the side of the first clamping tool facing away from the wheel disc; the locking nut is threadedly connected to the threaded section, and is used to tighten to the side of the second clamping tool facing away from the wheel disc.

[0018] The utility model is used for the low-speed blade tip grinding tool for rotor blades, the first side locking assembly and the second side locking assembly are both locking and tightening assemblies, and the locking and tightening assemblies include a first tightening force output member, a first locking plate, a second tightening force output member and a second locking plate;

[0019] The first tightening force output member is arranged on the corresponding first clamping tool or the second clamping tool; the connecting end of the first locking piece is connected to the output end of the first tightening force output member, and the extending end of the first locking piece is configured to extend into the opening on the corresponding side of the rotor blade inlet passage and tighten to the rotor blade;

[0020] The second clamping force output member is arranged on the corresponding first clamping tool or the second clamping tool; the connecting end of the second locking plate is connected to the output end of the second clamping force output member, and the extending end of the second locking plate is configured to extend into the opening on the corresponding side of the rotor blade outlet channel and tighten to the rotor blade.

[0021] In the low-speed blade tip grinding tool for rotor blades of the utility model, the first tightening force output member is a first jackscrew, the first jackscrew is threadedly connected to the corresponding first clamping tool or the second clamping tool, and the protruding end of the first jackscrew is connected to the connecting end of the first locking piece;

[0022] The second tightening force output member is a second top screw, the second top screw is threadedly connected to the corresponding first clamping tool or the second clamping tool, and the protruding end of the second top screw is connected to the connecting end of the second locking plate.

[0023] The utility model is used for the low-speed blade tip grinding tool for rotor blades, and the extending end of the first locking piece is provided with a first tightening fitting surface, and the first tightening surface includes a first inner arc surface and a first outer arc surface, the first inner arc surface is adapted to the outer diameter of the wheel disc at the rotor blade inlet passage, and the first outer arc surface is adapted to the lower surface of the rotor blade edge plate at the rotor blade inlet passage.

[0024] The utility model is used for the low-speed blade tip grinding tool for rotor blades, and the extension end of the second locking piece is provided with a second tightening fitting surface, and the second tightening surface includes a second inner arc surface and a second outer arc surface, and the second inner arc surface is adapted to the outer diameter of the wheel disc at the rotor blade outlet passage, and the second outer arc surface is adapted to the lower surface of the rotor blade edge plate at the rotor blade outlet passage.

[0025] In the low-speed blade tip grinding tool for rotor blades of the utility model, both the extending end of the first locking piece and the extending end of the second locking piece are provided with a flexible bonding layer.

[0026] In the low-speed blade tip grinding tool for rotor blades of the utility model, the clamping surfaces of the first clamping tool and the second clamping tool are respectively provided with clamping structures matching with two corresponding side surfaces on the axial direction of the wheel disc.

[0027] The low-speed blade tip grinding tool for rotor blades of the utility model further comprises a plurality of elastic members, wherein the elastic members are respectively arranged between adjacent rotor blades.

[0028] Due to the adoption of the above technical solution, the utility model has the following advantages and positive effects compared with the prior art:

[0029] The utility model discloses an embodiment of the utility model by arranging a first clamping tool and a second clamping tool on both sides of the wheel disc, both of which clamp the wheel disc and fix the relative position through a clamping force output unit; and further arranging locking parts corresponding to the rotor blades one by one, each locking part includes a first side locking component and a second side locking component, both of which are provided with two output ends, which extend into the rotor blade air inlet channel and the rotor blade air outlet channel between the rotor blade and the wheel disc from both sides in the axial direction, that is, each rotor blade is supported to the rotor blade through a total of four output ends of the first side locking component and the second side locking component, so as to cooperate with the wheel disc to realize the expansion of the rotor blade and limit its all degrees of freedom, so that blade tip grinding can be realized at low speed. Since there is no need to use a simulation disk to position the blade, the operation is simple and the production efficiency is improved. Moreover, in the case of radial tension of the rotor blade, the low-speed grinding accuracy is higher, because there is no need to consider the radial deformation of the rotor blade caused by the centrifugal force during high-speed grinding, the dimensional accuracy of the rotor blade after grinding is improved, and the problems of low production efficiency and unstable quality of the existing low-speed grinding of rotor blades are solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of a low-speed blade tip grinding tool for rotor blades of the utility model;

[0031] Figure 2 It is a schematic diagram of a wheel disc clamping tool for a low-speed blade tip grinding tool for rotor blades of the utility model;

[0032] Figure 3 It is a schematic diagram of a taper lock piece of a low-speed blade tip grinding tool for rotor blades of the utility model;

[0033] Figure 4 Another schematic diagram of the taper lock piece of the low-speed blade tip grinding tool for rotor blades of the utility model;

[0034] Figure 5 It is a cross-sectional view of a low-speed blade tip grinding tool for rotor blades of the utility model;

[0035] Figure 6 It is a schematic diagram of a top support of a tapered locking piece of a low-speed blade tip grinding tool for rotor blades according to the utility model.

[0036] Explanation of the accompanying drawings: 1. wheel clamping tool; 101. first clamping tool; 102. second clamping tool; 103. disc-shaped structure; 104. columnar structure; 105. through hole; 106. clamping structure; 107. screw hole; 2. center pull rod; 3. locking nut; 4. locking and tightening assembly; 401. tapered locking plate; 402. first locking plate; 4021. first inner arc surface; 4022. first outer arc surface; 403. first top screw. DETAILED DESCRIPTION

[0037] The following is a further detailed description of a low-speed blade tip grinding tool for rotor blades proposed by the utility model in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the utility model will become more apparent from the following description and claims.

[0038] See also Figures 1 to 6 In one embodiment, a low-speed blade tip grinding tool for rotor blades is provided. The radial clearance of the rotor blades directly affects the performance of the gas turbine. In order to ensure the blade tip clearance, the rotor blades need to be ground after assembly. Based on this, the present embodiment provides a low-speed blade tip grinding tool for rotor blades. The corresponding rotor blades are installed into the tenon grooves of the wheel disc through the tenon teeth thereon. There is a preset taper between the tenon groove and the axis of the wheel disc, and a rotor blade inlet channel and a rotor blade outlet channel inclined to the axis of the wheel disc are formed between the edge plate of each rotor blade and the outer diameter of the wheel disc.

[0039] The low-speed blade tip grinding tool specifically includes a first clamping tool, a second clamping tool, a clamping force output assembly and a plurality of locking parts.

[0040] The clamping surfaces of the first clamping fixture and the second clamping fixture are respectively used to fit the two side surfaces in the axial direction of the wheel disc. The clamping force output assembly is connected to the first clamping fixture and the second clamping fixture, and is used to output the clamping force toward the wheel disc to the two first clamping fixtures and the second clamping fixtures.

[0041] The direction from the first clamping fixture toward the wheel disc along the axis of the wheel disc is set as the first direction, and the direction from the second clamping fixture toward the wheel disc along the axis of the wheel disc is set as the second direction.

[0042] The locking portion corresponds to the rotor blade one by one, and the locking portion may specifically include a first side locking assembly and a second side locking assembly. The first side locking assembly is disposed on the first clamping fixture, and the two output ends of the first side locking assembly are arranged to extend into the rotor blade inlet passage and the rotor blade outlet passage of the corresponding rotor blade respectively along the first direction and output the clamping force to the corresponding rotor blade. The second side locking assembly is disposed on the second clamping fixture, and the two output ends of the second side locking assembly are arranged to extend into the rotor blade inlet passage and the rotor blade outlet passage of the corresponding rotor blade respectively along the second direction and output the clamping force to the corresponding rotor blade.

[0043] In this embodiment, a first clamping fixture and a second clamping fixture are arranged on both sides of the wheel disc, and the two clamping fixtures are used to clamp and fix the relative position of the wheel disc through a clamping force output unit. A locking part corresponding to each rotor blade is further arranged, and each locking part includes a first side locking component and a second side locking component, and both are provided with two output ends, which extend into the rotor blade inlet passage and the rotor blade outlet passage between the rotor blade and the wheel disc from both sides in the axial direction, respectively, that is, each rotor blade is supported to the rotor blade through a total of four output ends of the first side locking component and the second side locking component, so as to cooperate with the wheel disc to achieve the expansion of the rotor blade and limit its full degree of freedom, so that the blade tip grinding can be achieved at low speed. Since there is no need to use a simulation disk to position the blade, the operation is simple and the production efficiency is improved. Moreover, in the case of radial tension of the rotor blade, the low-speed grinding accuracy is higher, because there is no need to consider the radial deformation of the rotor blade caused by the centrifugal force during high-speed grinding, the dimensional accuracy of the rotor blade after grinding is improved, and the problem of low production efficiency and unstable quality of the existing low-speed grinding of rotor blades is solved.

[0044] The specific structure of the low-speed blade tip grinding tool for rotor blades of this embodiment is further described below:

[0045] Because the outer circle formed by the blade tips of multiple rotor blades is ground, the supporting part needs to be avoided. Therefore, in this embodiment, the first clamping tool and the second clamping tool are respectively provided with a first through hole and a second through hole corresponding to the axial hole of the wheel disc.

[0046] The clamping force output assembly can be arranged to pass through the first through hole, the shaft hole of the wheel disc and the second through hole.

[0047] Among them, the clamping force output component may specifically include a central pull rod and a locking nut, the central pull rod includes an abutment section, an intermediate section and a threaded section connected in sequence, wherein the cross-section of the abutment section is larger than that of the intermediate section, thereby forming a step surface located on the abutment section.

[0048] The middle section of the central pull rod is inserted into the first through hole, the shaft hole of the wheel disc and the second through hole. The step surface of the abutment section is used to abut against the side of the first clamping fixture away from the wheel disc, and the locking nut is threadedly connected to the threaded section and is used to tighten to the side of the second clamping fixture away from the wheel disc, so that the abutment section can apply a clamping force to the second clamping fixture and the first clamping fixture by screwing in the thread.

[0049] In this embodiment, the first clamping fixture and the second clamping fixture can be the same wheel clamping fixture, and the wheel clamping fixture can specifically include a disc-shaped structure and a columnar structure coaxially connected thereto, and the first through hole and the second through hole mentioned above are through holes opened by the axis of the disc-shaped structure and the columnar structure. The side of the disc-shaped structure away from the columnar structure is a clamping surface. In order to ensure the stability of clamping, a clamping structure corresponding to the lateral side of the wheel disc can be provided on the clamping surface, and the clamping structure matches the side surface of the wheel disc in the axial direction. For example, when the side surface of the wheel disc is provided with an end face tooth, an inner ring protrusion corresponding to the end face tooth can be provided on the clamping surface, and a concave groove matching the corresponding end face tooth one by one is provided on the annular protrusion (or the same end face tooth is provided on the inner ring protrusion, and the connection with the end face tooth of the wheel disc is achieved by meshing). Of course, in other embodiments, the clamping structure between the clamping surface and the wheel disc can be adjusted according to the actual assembly situation, such as Hertz teeth, arc teeth, bolts, central pull rods, circumferential pull rods, etc., which are not specifically limited here.

[0050] In this embodiment, the first side locking assembly and the second side locking assembly are both locking and tightening assemblies. Further, an outer ring-shaped protrusion may be provided on the clamping surface of the wheel clamping tool to install the corresponding locking and tightening assembly.

[0051] The locking and tightening assembly may specifically include a first tightening force output member, a first locking plate, a second tightening force output member, and a second locking plate.

[0052] The first tightening force output member is arranged on the corresponding outer ring-shaped protrusion. The connection end of the first locking plate is connected to the output end of the first tightening force output member, and the insertion end of the first locking plate is configured to be inserted into the opening on the corresponding side of the rotor blade inlet passage and tightened to the rotor blade. The second tightening force output member is also arranged on the corresponding outer ring-shaped protrusion. The connection end of the second locking plate is connected to the output end of the second tightening force output member, and the insertion end of the second locking plate is configured to be inserted into the opening on the corresponding side of the rotor blade outlet passage and tightened to the rotor blade.

[0053] Specifically, the first tightening force output member can be a first top screw, the first top screw thread is connected to the screw hole on the outer ring annular protrusion, the protruding end of the first top screw is connected to the connecting end of the first locking plate, and the supporting force of the first top screw on the first locking plate can be adjusted by adjusting the screwing amount of the thread through a torque wrench. Specifically, it can be controlled by the torque value acting on the first top screw through the torque wrench.

[0054] Similarly, the second tightening force output member can be a second top screw, the second top screw threadedly connected to the screw hole connected to the outer ring annular protrusion, the protruding end of the second top screw is connected to the connecting end of the second locking plate, and the supporting force of the second top screw on the second locking plate can be adjusted by adjusting the screwing amount of the thread through a torque wrench. Specifically, it can be controlled by the torque value applied to the second top screw by the torque wrench, thereby ensuring that the two first top screws and the two second top screws are evenly stressed on the rotor blades.

[0055] In this embodiment, in order to ensure line contact between the first locking plate and the rotor blade, a first tightening fitting surface is provided at the extending end of the first locking plate, and the first tightening surface includes a first inner arc surface and a first outer arc surface. The first inner arc surface is adapted to the outer diameter of the wheel at the rotor blade inlet passage, and the first outer arc surface is adapted to the lower surface of the rotor blade edge plate at the rotor blade inlet passage.

[0056] Similarly, in order to ensure linear contact between the first locking plate and the rotor blade, a second tightening surface is provided at the extending end of the second locking plate, and the second tightening surface includes a second inner arc surface and a second outer arc surface. The second inner arc surface is adapted to the outer diameter of the wheel at the rotor blade outlet channel, and the second outer arc surface is adapted to the lower surface of the rotor blade edge plate at the rotor blade outlet channel.

[0057] By making the inner and outer arcs of the supporting and fitting surfaces of the first locking plate and the second locking plate consistent with the outer diameter of the wheel disc and the outer diameter of the lower surface of the blade edge plate, they are in line contact when tightened, avoiding damage to the rotor blade edge plate due to point contact when the force is uneven.

[0058] Furthermore, the first bracing and fitting surface of the first locking piece and the second bracing and fitting surface of the second locking piece may be provided with a flexible fitting layer to prevent the rotor blade edge plate from being damaged when subjected to force.

[0059] In this embodiment, both the first locking piece and the second locking piece can be tapered locking pieces, and the tapered locking piece individually tightens each blade. Due to the existence of processing tolerance, the gaps between the tenon and the tenon groove are inconsistent after processing. The locking piece with a tapered shape is designed, so that each blade can be tightened. Among them, the structural form of the tapered locking piece can be designed according to the structural characteristics of the tightening point of the blade and the wheel disc, and is not limited to the structural form given in this patent, but the locking piece needs to have a taper.

[0060] In this embodiment, the low-speed blade tip grinding tool also includes a plurality of elastic members, which are respectively arranged between adjacent rotor blades. The elastic members may specifically be elastic rubber pads, which are filled between adjacent blades, thereby eliminating the phenomenon of grinding vibration.

[0061] In order to ensure the grinding accuracy, the process can be carried out by removing less allowance and grinding in multiple times. The blade tip size and radial runout should be measured before and after each disassembly and assembly until it is ground to the design size.

[0062] The assembly process of the low-speed blade tip grinding tool of this embodiment is described below:

[0063] First, the tenon of the rotor blade is axially inserted into the tenon of the wheel disc, so that the tenon can limit the radial and circumferential movement of the rotor blade relative to the wheel disc, and the protrusion of the rotor blade can limit the axial movement; then, the first clamping fixture with end teeth, the wheel disc with the rotor blade installed, and the second clamping fixture with end teeth are successively passed through the center pull rod for vertical stacking and assembly, and finally locked and fixed by the locking nut.

[0064] Insert the tapered locking pieces into the area between the blade edge plate and the outer diameter of the wheel disc in sequence (the inlet and outlet sides of the rotor blades are tightened with tapered locking pieces), which is equivalent to tightening each rotor blade with four tapered locking pieces, and then tightening the tapered locking pieces to limit the position through the corresponding top screws. The size of the tightening force of each rotor blade can be controlled by the torque value of the torque wrench acting on the corresponding top screws, thereby ensuring that the rotor blades are uniformly stressed. After the blades are tightened by the tapered locking pieces, blade tip grinding can be achieved at low speed. At the same time, for the same rotor blades, the tooling structure can be reused, reducing production costs.

[0065] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims

1. A low-speed blade tip grinding tool for rotor blades, wherein a plurality of rotor blades are installed into the tenon groove of a wheel disc through the tenon teeth thereon, a preset taper is provided between the tenon groove and the axis of the wheel disc, and a rotor blade inlet passage and a rotor blade outlet passage inclined to the axis of the wheel disc are formed between the edge plate of each rotor blade and the outer diameter of the wheel disc, wherein: include: A first clamping fixture and a second clamping fixture, wherein the clamping surfaces of the first clamping fixture and the second clamping fixture are respectively used to be attached to two side surfaces in the axial direction of the wheel disc; A clamping force output assembly, connected to the first clamping fixture and the second clamping fixture, and used to output a clamping force toward the wheel disc to the first clamping fixture and the second clamping fixture; The direction from the first clamping fixture to the wheel disc along the wheel disc axis is set as the first direction, and the direction from the second clamping fixture to the wheel disc along the wheel disc axis is set as the second direction; A plurality of locking parts corresponding to the rotor blades one by one; the locking parts include a first side locking assembly and a second side locking assembly; The first side locking assembly is disposed on the first clamping fixture, and two output ends of the first side locking assembly are arranged to extend into the rotor blade inlet passage and the rotor blade outlet passage of the corresponding rotor blade respectively along the first direction and output a tightening force to the corresponding rotor blade; The second side locking assembly is disposed on the second clamping tool, and two output ends of the second side locking assembly are arranged to extend into the rotor blade inlet channel and the rotor blade outlet channel of the corresponding rotor blade respectively along the second direction and output the clamping force to the corresponding rotor blade.

2. The low-speed blade tip grinding tool for rotor blades according to claim 1, characterized in that: The first clamping fixture and the second clamping fixture are respectively provided with a first through hole and a second through hole corresponding to the shaft hole of the wheel disc; The clamping force output assembly is arranged to pass through the first through hole, the shaft hole of the wheel disc and the second through hole.

3. The low-speed blade tip grinding tool for rotor blades according to claim 2, characterized in that: The clamping force output assembly includes a central pull rod and a locking nut; The central pull rod comprises an abutment section, an intermediate section and a threaded section which are connected in sequence; The middle section is penetrated through the first through hole, the axial hole of the wheel disc and the second through hole; the abutment section is used to abut against the side of the first clamping tool facing away from the wheel disc; the locking nut is threadedly connected to the threaded section, and is used to tighten to the side of the second clamping tool facing away from the wheel disc.

4. The low-speed blade tip grinding tool for rotor blades according to claim 1, characterized in that: The first side locking assembly and the second side locking assembly are both locking and tightening assemblies, and the locking and tightening assemblies include a first tightening force output member, a first locking plate, a second tightening force output member and a second locking plate; The first tightening force output member is arranged on the corresponding first clamping tool or the second clamping tool; the connecting end of the first locking piece is connected to the output end of the first tightening force output member, and the extending end of the first locking piece is configured to extend into the opening on the corresponding side of the rotor blade inlet passage and tighten to the rotor blade; The second clamping force output member is arranged on the corresponding first clamping tool or the second clamping tool; the connecting end of the second locking plate is connected to the output end of the second clamping force output member, and the extending end of the second locking plate is configured to extend into the opening on the corresponding side of the rotor blade outlet channel and tighten to the rotor blade.

5. The low-speed blade tip grinding tool for rotor blades according to claim 4, characterized in that: The first tightening force output member is a first jackscrew, the first jackscrew is threadedly connected to the corresponding first clamping tool or the second clamping tool, and the protruding end of the first jackscrew is connected to the connecting end of the first locking piece; The second tightening force output member is a second top screw, the second top screw is threadedly connected to the corresponding first clamping tool or the second clamping tool, and the protruding end of the second top screw is connected to the connecting end of the second locking plate.

6. The low-speed blade tip grinding tool for rotor blades according to claim 4, characterized in that: The extending end of the first locking plate is provided with a first tight fitting surface, and the first tight fitting surface includes a first inner arc surface and a first outer arc surface, the first inner arc surface is adapted to the outer diameter of the wheel disc at the rotor blade inlet passage, and the first outer arc surface is adapted to the lower surface of the rotor blade edge plate at the rotor blade inlet passage.

7. The low-speed blade tip grinding tool for rotor blades according to claim 4, characterized in that: The extending end of the second locking piece is provided with a second tight fitting surface, and the second tight fitting surface includes a second inner arc surface and a second outer arc surface, the second inner arc surface is adapted to the outer diameter of the wheel disc at the rotor blade outlet channel, and the second outer arc surface is adapted to the lower surface of the rotor blade edge plate at the rotor blade outlet channel.

8. The low-speed blade tip grinding tool for rotor blades according to claim 4, characterized in that: The extending end of the first locking piece and the extending end of the second locking piece are both provided with a flexible bonding layer.

9. The low-speed blade tip grinding tool for rotor blades according to claim 1, characterized in that: The clamping surfaces of the first clamping fixture and the second clamping fixture are respectively provided with clamping structures matching with two corresponding side surfaces in the axial direction of the wheel disc.

10. The low-speed blade tip grinding tool for rotor blades according to claim 1, characterized in that: The invention also comprises a plurality of elastic members, wherein the elastic members are respectively arranged between adjacent rotor blades.

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