A device for clamping a double crown type shaft diameter blade

Abstract

This invention discloses a device for clamping double-crowned shaft diameter blades, comprising: a top clamping mechanism for clamping the tip shaft of the double-crowned shaft diameter blade; a rotating rod, horizontally positioned with one end fixedly connected to the top clamping mechanism; a fixed upright, vertically positioned with its upper end rotatably connected to the other end of the rotating rod; and a bottom clamping mechanism, positioned opposite to and below the top clamping mechanism, fixedly connected to the lower end of the fixed upright, for clamping the root shaft of the double-crowned shaft diameter blade, and cooperating with the top clamping mechanism to clamp the double-crowned blade, thereby measuring the blade's shape parameters. This invention can simulate the installation method of blades in an engine to position and clamp the blades, thereby measuring the working surfaces of the blade root edge and blade body, ensuring that the overall quality of the blades meets the requirements.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of aviation blade manufacturing, and particularly relates to a device for clamping a double-crown type shaft-diameter blade. BACKGROUND

[0002] An aero-engine is the heart of an airplane and also a difficulty in airplane manufacturing. Among them, the aero-engine blade accounts for about 30% of the aero-engine manufacturing. Due to the complex curved surface, large size, and harsh working environment of the aero-engine blade, the performance of the aero-engine is mainly subject to the manufacturing level of the aero-engine blade.

[0003] In order to ensure the service life and performance of the aero-engine, the material of the aero-engine blade is usually made of alloy or high-temperature alloy. Due to the requirements of the aerodynamic characteristics of the blade, the blade must have strict size and surface integrity processing requirements. Therefore, the aero-engine blade needs to have reasonable processing technology and detection during the processing, so as to ensure the processing precision of the blade.

[0004] The shaft-diameter type blade in the aero-engine needs to measure various parameters of the blade shape during the manufacturing process. The blade body of the blade has a cylindrical shaft structure at one end or both ends, and is installed on the engine ring through the cylindrical shaft to guide the gas passing through the engine flow channel.

[0005] The two ends of the double-crown blade are shafts, namely the tip shaft and the root shaft. Due to the complexity of the blade structure, the existing clamp first positions the blade and then clamps the blade shaft during the measurement of the blade shape parameters. The operation procedure is complex, and the clamp is easy to loosen, difficult to install, and time-consuming. SUMMARY

[0006] The purpose of the present application is to provide a device for clamping a double-crown type shaft-diameter blade, which solves the problems of complex operation procedure, easy loosening, complex installation, and long time consumption of the existing clamp, so as to meet the needs of timely and rapid measurement and evaluation of the blade in the production site.

[0007] The present application adopts the following technical scheme: a device for clamping a double-crown type shaft-diameter blade, comprising:

[0008] a top clamping mechanism for clamping the tip shaft of the double-crown type shaft-diameter blade,

[0009] a rotating rod horizontally arranged, one end of which is fixedly connected with the top clamping mechanism,

[0010] a fixed vertical rod vertically arranged, the upper end of which is rotationally connected with the other end of the rotating rod,

[0011] The bottom clamping mechanism is arranged below the top clamping mechanism and is fixedly connected with the lower end of the fixed vertical rod, is used for clamping the blade root shaft of the double-crown type shaft diameter blade, and is matched with the top clamping mechanism to clamp the double-crown type blade, and then the blade shape parameters are measured.

[0012] The top clamping mechanism comprises:

[0013] The positioning column is vertically arranged, and the upper end of the positioning column is fixedly connected with one end of the rotating rod,

[0014] The positioning sleeve is vertically arranged and is a hollow column structure, the top of the positioning sleeve is closed, the positioning sleeve is arranged below the positioning column and is integrally connected with the lower end of the positioning column, and the inner cavity of the positioning sleeve is used for the blade tip shaft of the double-crown blade to extend from below to above and be abutted,

[0015] The locking mechanism is arranged on the periphery of the positioning sleeve and is used for clamping the blade tip shaft of the blade.

[0016] Further, a plurality of first positioning holes are arranged on the outer wall of the positioning sleeve and penetrate the cylindrical section in the radial direction,

[0017] The locking mechanism comprises:

[0018] The first ring is arranged on the periphery of the positioning sleeve, a second positioning groove is arranged on the inner wall of the first ring and surrounds the first ring, and the second positioning groove is arranged in correspondence with the first positioning hole,

[0019] A plurality of third steel balls are arranged in the first positioning holes in correspondence, are used for corresponding to the first positioning hole and the second positioning groove and rolling outward and releasing the blade tip shaft of the double-crown blade when the first ring moves downward, and are used for corresponding to the first positioning hole and the second positioning groove and moving inward and being limited on the blade tip shaft of the double-crown blade when the first ring moves upward.

[0020] Further, a third positioning groove is arranged on the upper side wall of the first ring,

[0021] The locking mechanism further comprises:

[0022] The second ring is arranged on the periphery of the positioning column and is arranged above the first ring, a fourth positioning groove is arranged on the lower side wall of the second ring, and the third positioning groove and the fourth positioning groove form an adjustment area in correspondence,

[0023] The force receiving rod is horizontally arranged and has an elliptical cross section. The force receiving rod is located in the adjusting area formed by the third positioning groove and the fourth positioning groove. When the force receiving rod is rotated to a vertical arrangement of the long side after receiving an external force, the first ring is pushed downward to move downward, so that the third steel ball is released from clamping the blade tip shaft. When the force receiving rod is rotated to a vertical arrangement of the short side after receiving an external force, the first ring moves upward, so that the third steel ball is pressed toward the blade and clamps the blade tip shaft.

[0024] Further, a fifth positioning groove is vertically and penetratively arranged on the outer edge of the first ring, and a sixth accommodating groove is vertically and penetratively arranged on the outer edge of the second ring. The fifth positioning groove and the sixth accommodating groove form a reset area.

[0025] The locking mechanism further comprises two horizontally arranged reset rods and a vertically arranged third elastic member in the reset area. The two ends of one reset rod are respectively arranged on the upper side of the second ring, and the two ends of the other reset rod are respectively arranged on the lower side of the first ring. The two ends of the third elastic member are hung on the middle part of the two reset rods. The third elastic member is used to pull the first ring upward to reset.

[0026] Further, the third positioning groove and the fourth positioning groove are each provided with two symmetrical positioning grooves, and the force receiving rod is also provided with two force receiving rods. The two force receiving rods are fixedly connected by a lever. The lever is semicircular and located at the periphery of the first ring and the second ring. The lever is used to rotate upward or downward around the line connecting the two force receiving rods, thereby driving the force receiving rod to rotate.

[0027] Further, the plurality of first positioning holes are arranged radially, and three third steel balls are arranged in each first positioning hole. The outer third steel ball is used to roll outward and leave a gap for the inner third steel ball to move, so that the inner third steel ball releases the blade tip shaft of the double-crown blade. The outer third steel ball is also used to press the inner third steel ball inward to move and abut against the blade tip shaft of the double-crown blade.

[0028] Further, the top opening of the second ring is inwardly contracted and forms a through hole for the positioning column to pass through, so that the inner cavity of the second ring forms an accommodating cavity. The accommodating cavity is provided with an upper rotating disc on the upper side and a lower rotating disc on the lower side. A semicircular rotating groove is arranged on the lower side of the upper rotating disc and the upper side of the lower rotating disc. The two rotating grooves form a rotating cavity. A plurality of fourth steel balls are arranged in the rotating cavity. The plurality of fourth steel balls are used to reduce the friction between the upper rotating disc and the lower rotating disc. The upper rotating disc and the lower rotating disc are used to cooperate with each other to ensure that the rotating axis of the second ring does not deviate when the first ring moves downward under force, thereby ensuring that the first ring coincides with the axis of the blade when rotating.

[0029] Furthermore, the fixed upright and the rotating rod are connected to each other by a positioning rod. The positioning rod is vertically set and its lower end is locked inside the fixed upright by a positioning pin. The right end of the rotating rod is sleeved on the positioning rod. The rotating rod is used to move upward along the positioning rod to move the top clamping mechanism upward, thereby allowing the tip shaft of the double-crown blade to extend into the top clamping mechanism. A limit block is provided at the right end of the rotating rod. The limit block is fixedly connected to the upper end of the fixed upright and is used to abut against the right end face of the rotating rod and restrict its rotation.

[0030] Furthermore, the bottom retaining mechanism includes:

[0031] The lower support has a horizontally penetrating lower receiving groove on its lower side and a fixing hole on its top.

[0032] The fixing post, vertically positioned above the lower support and integrally connected to it, has its axis aligned with the axis of the fixing hole. The inner cavity of the fixing post allows the blade root shaft of the double-crown blade to pass through from top to bottom and extend into the lower receiving groove. The upper edge of the fixing post abuts against the lower side of the blade root edge plate of the double-crown blade.

[0033] The lower clamping mechanism, located in the lower receiving groove of the lower support, is used to clamp the lower end of the blade root shaft of the double-crown blade passing through the fixed column, thus restricting the radial rotation of the double-crown blade.

[0034] The upper clamping mechanism, located on the upper side of the lower support and outside the fixed column, is used to limit the curved surface of the root axis of the double-crown blade.

[0035] The beneficial effects of this invention are:

[0036] 1. This invention can simulate the installation method of blades in an engine to position and clamp the blades, and then measure the working surfaces of the blade root edge plate and blade body to ensure that the overall quality of the blades meets the requirements.

[0037] 2. The present invention clamps the blades through a top clamping mechanism and a bottom clamping mechanism. After clamping, the blades can be moved freely, and the position of the blades and the entire device can be adjusted according to the site conditions, thereby adjusting the position of the blades, which has the advantages of timeliness and flexibility.

[0038] 3. The present invention has a clever and compact structure, is easy to use, has stable positioning, reliable clamping, and simple operation, which can improve the efficiency of detection.

[0039] 4. This invention simulates the installation method and measures the blade profile parameters in the installation mode, which can better ensure the true pass rate; the flexibility is greatly improved when combined with measurement methods such as optical scanning and coordinate measuring machine; this invention can be used as a coordinate measuring machine holder for coordinate measuring machine measurement; it can also be installed in a profile measuring tool to measure the blade profile using a profile template. Attached Figure Description

[0040] Figure 1 Structure diagram of the present application;

[0041] Figure 2 Sectional view of the bottom clamping mechanism of the present application;

[0042] Figure 3 Detail view of the bottom clamping mechanism of the present application;

[0043] Figure 4 Structure diagram of the lower clamping mechanism of the present application;

[0044] Figure 5 Structure diagram of the lower support of the present application;

[0045] Figure 6 Structure diagram of the double-crown blade of the present application;

[0046] Figure 7 Sectional view of the bottom clamping mechanism of the present application;

[0047] Figure 8 Sectional view of the top clamping mechanism of the present application;

[0048] Figure 9 Structure diagram of the lower circular ring of the present application;

[0049] Figure 10 Sectional view of the top clamping mechanism of the present application;

[0050] Figure 11 Side view of the top clamping mechanism of the present application;

[0051] Figure 12 Position diagram of the power rod of the present application.

[0052] Wherein: 1, lower support; 2, fixed column; 3, lower clamping mechanism; 4, upper clamping mechanism; 5, double-crown blade;

[0053] 31, sliding bottom plate; 32, left clamping block; 33, limiting plate; 34, baffle; 35, screw rod; 36, positioning pin; 37, second elastic member; 38, right clamping block;

[0054] 41, lower circular ring; 42, first steel ball; 43, upper circular ring; 44, second steel ball; 45, power rod; 46, fixed rod; 47, first elastic member; 48, connecting rod;

[0055] 51, blade tip shaft; 52, blade root rim plate; 53, blade root shaft; 54, first locking clamping groove; 55, second locking clamping groove;

[0056] 6, top clamping mechanism; 61, rotating rod; 62, fixed vertical rod; 63, positioning column; 64, positioning sleeve;

[0057] 7, bottom clamping mechanism;

[0058] 8, locking mechanism; 81, first ring; 82, third steel ball; 83, second ring; 84, force rod; 85, reset rod; 86, third elastic member; 87, push rod; 88, upper rotating disc; 89, fourth steel ball; 90, lower rotating disc; 91, positioning rod. DETAILED DESCRIPTION

[0059] The application will be described in detail below with reference to the drawings and specific embodiments.

[0060] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. The "trend" in the present application is described according to the trend when the present application is in the Figure 1 state.

[0061] The application discloses a device for clamping double-crown type shaft diameter blades, as shown in Figure 1 and 6 , which comprises a top clamping mechanism 6, a rotating rod 61, a fixed vertical rod 62 and a bottom clamping mechanism 7.

[0062] The top clamping mechanism 6 is used for clamping the blade tip shaft of the double-crown type shaft diameter blade, the rotating rod 61 is horizontally arranged, one end of the rotating rod 61 is fixedly connected with the top clamping mechanism 6, and the fixed vertical rod 62 is vertically arranged, and the upper end of the fixed vertical rod 62 is rotationally connected with the other end of the rotating rod 61.

[0063] The bottom clamping mechanism 7 is arranged opposite to the top clamping mechanism 6 and is located below the top clamping mechanism 6. The bottom clamping mechanism 7 is fixedly connected to the lower end of the fixed upright 62. The bottom clamping mechanism 7 is used to clamp the root shaft of the double-crown type blade and cooperates with the top clamping mechanism 6 to clamp the double-crown type blade, thereby measuring the blade shape parameters.

[0064] like Figure 8 , 10 As shown in Figure 11, the top holding mechanism 6 includes: a positioning post 63, a positioning sleeve 64, and a locking mechanism 8.

[0065] The positioning post 63 is vertically arranged, and its upper end is fixedly connected to one end of the rotating rod 61. The positioning sleeve 64 is vertically arranged and is a hollow columnar structure. The top of the positioning sleeve 64 is closed. The positioning sleeve 64 is located on the lower side of the positioning post 63 and is integrally connected to the lower end of the positioning post 63. The inner cavity of the positioning sleeve 64 is used for the blade tip shaft of the double-crown blade to extend from bottom to top and be abutted. The locking mechanism 8 is sleeved on the outer periphery of the positioning sleeve 64 and is used to clamp the blade tip shaft.

[0066] Multiple first positioning holes are radially opened on the outer wall of the positioning sleeve 64 along the cylindrical cross section. The locking mechanism 8 includes: a first ring 81 and multiple third steel balls 82. The first ring 81 is sleeved on the outer periphery of the positioning sleeve 64. A second positioning groove is opened on the inner wall of the first ring 81 around it. The second positioning groove is corresponding to the first positioning hole.

[0067] Multiple third steel balls 82 are correspondingly placed in each of the first positioning holes. When the first ring 81 moves downward, the multiple third steel balls 82 are used to make the first positioning holes correspond to the second positioning grooves, and the third steel balls 82 roll outward and release the tip shaft of the double-crown blade. The multiple third steel balls 82 are also used to make the first positioning holes and the second positioning grooves misaligned when the first ring 81 moves upward, and to press the third steel balls 82 inward and abut against the tip shaft of the double-crown blade to limit its movement.

[0068] The upper side wall of the first ring 81 is provided with a third positioning groove, and the locking mechanism 8 also includes: a second ring 83 and a force-bearing rod 84.

[0069] The second ring 83 is sleeved around the positioning post 63 and located above the first ring 81. The lower side wall of the second ring 83 is provided with a fourth positioning groove. The third positioning groove and the fourth positioning groove cooperate with each other to form an adjustment area.

[0070] The force-bearing rod 84 is horizontally positioned, and its cross-section is elliptical. The force-bearing rod 84 is located within the adjustment area formed by the cooperation of the third positioning groove and the fourth positioning groove. When the force-bearing rod 84 is rotated to a vertical position after being subjected to external force, it pushes the first ring 81 downward, causing the first ring 81 to move downward, thereby releasing the third steel ball 82 from clamping the blade tip shaft. The force-bearing rod 84 is also used to move the first ring 81 upward when it is rotated to a vertical position after being subjected to external force, thereby squeezing the third steel ball 82 toward the blade and clamping the blade tip shaft.

[0071] The outer edge of the first ring 81 is vertically perforated with a fifth positioning groove, and the outer edge of the second ring 83 is vertically perforated with a sixth receiving groove. The fifth positioning groove and the sixth receiving groove cooperate to form a reset area. The locking mechanism 8 also includes: two horizontally arranged reset rods 85 located in the reset area and a vertically arranged third elastic member 86. The two ends of one reset rod 85 respectively abut against the upper side of the second ring 83, and the two ends of the other reset rod 85 respectively rest on the lower side of the first ring 81. The two ends of the third elastic member 86 are hung in the middle of the two reset rods 85. The third elastic member 86 is used to pull the first ring 81 upward to reset.

[0072] Two third and four positioning slots are provided and are arranged symmetrically to each other. Two force-bearing rods 84 are also provided. The two force-bearing rods 84 are fixedly connected by a lever 87. The lever 87 is semi-circular and located outside the first ring 81 and the second ring 83. The lever 87 is used to rotate upward or downward about the line connecting the two force-bearing rods 84 as the axis, thereby driving the force-bearing rods 84 to rotate.

[0073] Multiple first positioning holes are arranged radially, and three third steel balls 82 are placed in each first positioning hole. The outermost third steel ball 82 is used to roll outward and leave a gap for the innermost third steel ball 82 to move, so that the innermost third steel ball 82 loosens the tip axis of the double-crown blade. The outermost third steel ball 82 is also used to press the innermost third steel ball 82 inward to move inward and abut against the tip axis of the double-crown blade.

[0074] The top opening of the second ring 83 narrows inward to form a through hole for the positioning post 63 to pass through, thereby forming a receiving cavity inside the second ring 83. The receiving cavity contains an upper rotating disk 88 on the upper side and a lower rotating disk 90 on the lower side. Semi-circular rotating grooves are formed on the lower side of the upper rotating disk 88 and the upper side of the lower rotating disk 90. ​​The two rotating grooves cooperate to form a rotating cavity. Multiple fourth steel balls 89 are arranged in the rotating cavity. The multiple fourth steel balls 89 are used to reduce the friction between the upper rotating disk 88 and the lower rotating disk 90. ​​The upper rotating disk 88 and the lower rotating disk 90 cooperate to ensure that the rotation axis of the second ring 83 does not deviate when the first ring 81 moves downward under force, thereby ensuring that the first ring 81 coincides with the axis of the blade when it rotates.

[0075] The fixed upright 62 and the rotating rod 61 are connected to each other by a positioning rod 91. The positioning rod 91 is vertically set and its lower end is locked in the fixed upright 62 by a positioning pin. The right end of the rotating rod 61 is sleeved on the positioning rod 91. The rotating rod 61 is used to move upward along the positioning rod 91 to move the top clamping mechanism 6 upward, thereby allowing the tip shaft of the double-crown blade to extend into the top clamping mechanism 6. A limit block is provided at the right end of the rotating rod 61. The limit block is fixedly connected to the upper end of the fixed upright 62. The limit block is used to abut against the right end face of the rotating rod 61 and restrict its rotation.

[0076] like Figures 2-5 As shown in Figures 7 and 8, the bottom clamping mechanism 7 includes: a lower support 1, a fixed column 2, a lower clamping mechanism 3, and an upper clamping mechanism 4.

[0077] The lower support 1 has a horizontally penetrating lower receiving groove on its lower side, and a fixing hole is provided on the top of the lower support 1. The fixing column 2 is vertically arranged, located on the upper side of the lower support 1, and integrally connected with the lower support 1. The axis of the fixing column 2 coincides with the axis of the fixing hole. The inner cavity of the fixing column 2 is used for the blade root shaft 53 of the double crown blade 5 to pass through from top to bottom and extend into the lower receiving groove. The upper edge of the fixing column 2 is used to abut against the lower side of the blade root edge plate 52 of the double crown blade 5.

[0078] The lower clamping mechanism 3 is located in the lower receiving groove of the lower support 1. The lower clamping mechanism 3 is used to clamp the lower end of the blade root shaft 53 of the double crown blade 5 that passes through the fixed column 2, thereby restricting the radial rotation of the double crown blade 5.

[0079] The upper clamping mechanism 4 is located on the upper side of the lower support 1 and on the periphery of the fixing column 2. The upper clamping mechanism 4 is used to limit the curved surface of the root axis 53 of the double crown blade 5.

[0080] The upper holding mechanism 4 includes: a lower ring 41 and multiple first steel balls 42.

[0081] The lower ring 41 is sleeved around the periphery of the fixed post 2. A first receiving groove is provided around the inner wall of the lower ring 41. Multiple first receiving holes are provided on the outer wall of the fixed post 2, radially through the cylindrical section. The multiple first receiving holes are provided in correspondence with the first receiving groove.

[0082] Multiple first steel balls 42 are correspondingly placed in multiple first receiving holes. When the lower ring 41 moves downward, the multiple first steel balls 42 are used to make the first receiving groove correspond to the first receiving hole, and the first steel balls 42 roll outward and loosen the axial curved surface of the shaft diameter blade. The multiple first steel balls 42 are also used to make the first receiving groove and the first receiving hole misaligned when the lower ring 41 moves upward, and to press the first steel balls 42 inward and abut against the axial curved surface of the shaft diameter blade to limit its movement.

[0083] The upper holding mechanism 4 also includes: an upper ring 43 and multiple second steel balls 44.

[0084] The upper ring 43 is sleeved around the periphery of the fixed post 2 and located above the lower ring 41. A second receiving groove is provided around the inner wall of the upper ring 43, and a third receiving groove is provided around the outer wall of the fixed post 2.

[0085] Multiple second steel balls 44 are located within the receiving area formed by the cooperation of the second and third receiving grooves, and the multiple second steel balls 44 are used to hold the upper ring 43 around the periphery of the fixed post 2.

[0086] The lower side wall of the upper ring 43 is provided with a fourth receiving groove, and the upper side wall of the lower ring 41 is provided with a fifth receiving groove. The fourth and fifth receiving grooves cooperate with each other to form an active area.

[0087] like Figure 9 and 12 As shown, the upper clamping mechanism 4 also includes a power rod 45, which is horizontally arranged and has an elliptical cross-section. The power rod 45 is located within the active area formed by the fourth and fifth receiving grooves. When the power rod 45 is rotated to a vertical position after being subjected to external force, it pushes the lower ring 41 downward, causing the lower ring 41 to move downward, thereby causing the second steel ball 44 to release the axial curved surface of the blade. The power rod 45 is also used to move the lower ring 41 upward when it is rotated to a vertical position after being subjected to external force, thereby pressing the second steel ball 44 against the axial curved surface of the blade.

[0088] like Figure 7 and 8As shown, a sixth receiving groove is vertically opened through the outer edge of the upper ring 43, and a seventh receiving groove is vertically opened through the outer edge of the lower ring 41. The sixth and seventh receiving grooves cooperate to form a recovery area. The upper holding mechanism 4 also includes: two horizontally arranged fixing rods 46 located in the recovery area and a vertically arranged first elastic member. The two ends of one fixing rod 46 respectively abut against the upper side of the upper ring 43, and the two ends of the other fixing rod 46 respectively rest on the lower side of the lower ring 41. The two ends of the first elastic member are hung in the middle of the two fixing rods 46. The first elastic member is used to pull the lower ring 41 upward to reset.

[0089] The fourth and fifth receiving slots each have two slots, which are arranged symmetrically to each other. There are also two power rods 45. The two power rods 45 are fixedly connected by a connecting rod 48. The connecting rod 48 is semi-circular and located outside the lower ring 41 and the upper ring 43. The connecting rod 48 is used to rotate upward or downward about the line connecting the two power rods 45 as the axis, thereby driving the power rods 45 to rotate.

[0090] Multiple first receiving holes are arranged radially, and two first steel balls 42 are placed in each first receiving hole. The outer first steel ball 42 is used to roll outward and leave a gap for the inner first steel ball 42 to move, so that the inner first steel ball 42 loosens the axial curved surface of the axial blade. The outer first steel ball 42 is also used to press the inner first steel ball 42 inward to move inward and abut against the axial curved surface of the axial blade.

[0091] like Figure 4 As shown, the lower clamping mechanism 3 includes: a sliding base plate 31, a left clamping block 32, a right clamping block 38, and a limiting plate 33. The sliding base plate 31 is horizontally arranged, and a sliding groove is provided through the sliding base plate 31. The left clamping block 32 is fixedly connected to the left side of the sliding base plate 31, and a left clamping plate is fixedly connected to the upper edge of the left clamping block 32. The left clamping plate is used to extend into the first locking groove 54 of the shaft diameter type blade.

[0092] The right locking block 38 is located in the sliding groove and can slide left and right along the sliding groove. The upper edge of the right locking block 38 is fixedly connected to the right locking plate. The right locking plate is correspondingly set with the left locking plate and is used to extend into the second locking groove 55 of the shaft diameter type blade, and cooperate with the left locking plate to lock the lower end of the shaft of the shaft diameter type blade. The limiting plate 33 is located on the lower side of the sliding base plate 31. The lower side of the right locking block 38 passes through the sliding groove and is fixedly connected to the limiting plate 33. The limiting plate 33 is used to limit the right locking block 38.

[0093] The lower clamping mechanism 3 also includes: a baffle 34, a screw 35, a positioning pin 36, and a second elastic element 37.

[0094] The baffle 34 is located on the right side of the right locking block 38, and its lower end is fixedly connected to the right side of the sliding base plate 31. The screw 35 is horizontally set, and the left end of the screw 35 passes through the baffle 34 and abuts against the right locking block 38. The screw 35 is used to press the right locking block 38. The positioning pin 36 is horizontally set, and the left end of the positioning pin 36 is fixed to the right side of the left locking block 32. The second elastic member 37 is sleeved on the positioning pin 36. The two ends of the second elastic member 37 are fixedly connected to the left locking block 32 and the right locking block 38 respectively. The second elastic member 37 is used to push the right locking block 38 to reset to the right.

[0095] Double-crown axial diameter blades, also known as double-crown blades, such as... Figure 6 As shown, the double-crown blade has a shaft at both the upper and lower ends. The upper end is the blade tip shaft 51, and the lower end is the blade root shaft 53. There is a horizontally arranged blade root edge plate 52 near the blade root shaft 53. The left and right sides of the lowest end of the blade root shaft 53 are respectively provided with a first locking groove 54 and a second locking groove 55.

[0096] The present invention uses a top clamping mechanism 6 to fix the tip shaft 51 of the double-crown blade 5, and then uses a bottom clamping mechanism 7 to fix the root shaft 53 of the blade. When the blade body is relatively long, if only the root shaft 53 is fixed and the tip shaft 51 is not fixed, the tip shaft 51 will wobble. Such wobble will cause errors in the measuring equipment. Therefore, it is necessary to fix both the root shaft 53 and the tip shaft 51.

[0097] When it is necessary to fix the blade, first move the rotating rod 61 upward, and then rotate it so that the bottom clamping mechanism 7 is located next to the top clamping mechanism 6. Then use the bottom clamping mechanism 7 to fix the blade root shaft 53. Then rotate the rotating rod 61 so that the top clamping mechanism 6 is directly above the bottom clamping mechanism 7. Then move the rotating rod 61 downward so that the blade tip shaft 51 of the double-crown blade extends into the top clamping mechanism 6 and then clamps the blade.

[0098] This invention uses a lower clamping mechanism 3 to clamp the blade root shaft 53, preventing radial rotation of the blade. Then, an upper clamping mechanism 4 holds the blade root shaft 53 in place, working in conjunction with the lower clamping mechanism 3 to fix the blade. When the upper clamping mechanism 4 holds the blade, a first steel ball 42 is used to clamp the blade root shaft 53. Since the first steel ball 42 can roll slightly, rolling during clamping will not damage the blade root shaft 53. Furthermore, a power rod 45 pushes the lower ring 41 downwards. Because the power rod 45 has an elliptical cross-section, when its long side rotates to a vertical position, it pushes the lower ring 41 downwards, forcing the second steel ball 44 to release the blade shaft, and vice versa. The principle and movement of the force-bearing rod 84 are similar to those of the power rod 45.

[0099] This invention uses two fixing rods 46 and a first elastic element 47 to fix the lower ring 41 and the upper ring 43 together. When the lower ring 41 moves downwards, the short side of the power rod 45 rotates to a vertical position, generating an upward pulling force on the lower ring 41, forcing it to return to its original position. To ensure smooth movement of the lower ring 41, three recovery zones are provided, correspondingly with six fixing rods 46 and three first elastic elements 47. The principle and movement of the reset rod 85 are similar to those of the fixing rods 46, and the principle and movement of the third elastic element 86 are similar to those of the first elastic element 47.

[0100] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for clamping double-crown type shaft diameter blades, characterized in that, include: The top clamping mechanism (6) is used to clamp the tip shaft of the double-crown type blade. The rotating rod (61) is horizontally positioned, with one end fixedly connected to the top clamping mechanism (6). A fixed upright (62) is vertically installed, and its upper end is rotatably connected to the other end of a rotating rod (61). The bottom clamping mechanism (7) is arranged opposite to the top clamping mechanism (6) and located below the top clamping mechanism (6). It is fixedly connected to the lower end of the fixed upright (62) and is used to clamp the root shaft of the double-crown type blade. It cooperates with the top clamping mechanism (6) to clamp the double-crown type blade and then measures the blade shape parameters of the double-crown type blade. The top holding mechanism (6) includes: The positioning column (63) is vertically set, and its upper end is fixedly connected to one end of the rotating rod (61). The positioning sleeve (64) is vertically arranged and is a hollow columnar structure with a closed top. It is located below the positioning post (63) and is integrally connected to the lower end of the positioning post (63). The inner cavity of the positioning sleeve (64) is used for the blade tip shaft of the double-crown type blade to extend from bottom to top and be abutted. The locking mechanism (8) is sleeved around the positioning sleeve (64) and is used to clamp the tip shaft of the double-crown type blade. Multiple first positioning holes are provided on the outer wall of the positioning sleeve (64) radially through the cylindrical cross-section. The locking mechanism (8) includes: The first ring (81) is sleeved around the periphery of the positioning sleeve (64), and a second positioning groove is formed on its inner wall around its circumference. The second positioning groove is correspondingly provided with the first positioning hole. Multiple third steel balls (82) are placed in each of the first positioning holes. When the first ring (81) moves downward, the first positioning hole and the second positioning groove correspond to each other, and the third steel ball (82) rolls outward and releases the tip shaft of the double-crown type blade. When the first ring (81) moves upward, the first positioning hole and the second positioning groove are misaligned, and the third steel ball (82) is pressed inward and abuts against the tip shaft of the double-crown type blade to limit its movement.

2. The device for clamping double-crown type shaft diameter blades according to claim 1, characterized in that, The upper sidewall of the first ring (81) is provided with a third positioning groove. The locking mechanism (8) further includes: The second ring (83) is sleeved around the positioning post (63) and located above the first ring (81). The lower side wall of the second ring (83) is provided with a fourth positioning groove. The third positioning groove and the fourth positioning groove cooperate with each other to form an adjustment area. The force-bearing rod (84) is horizontally set and has an elliptical cross-section. It is located in the adjustment area formed by the cooperation of the third positioning groove and the fourth positioning groove. When it is rotated to the vertical position of its long side after being subjected to external force, it pushes the first ring (81) downward so that the first ring (81) moves downward so that the third steel ball (82) releases its clamping on the blade tip shaft. It is also used to move the first ring (81) upward so that the third steel ball (82) is squeezed towards the double-crown type shaft diameter blade and clamps the blade tip shaft when it is rotated to the vertical position of its short side after being subjected to external force.

3. The device for clamping double-crown type shaft diameter blades according to claim 2, characterized in that, The first ring (81) has a fifth positioning groove vertically extending through its outer edge, and the second ring (83) has a sixth receiving groove vertically extending through its outer edge. The fifth positioning groove and the sixth receiving groove cooperate to form a reset area. The locking mechanism (8) further includes two horizontally arranged reset rods (85) and a vertically arranged third elastic member (86) located in the reset area. The two ends of one reset rod (85) abut against the upper side of the second ring (83), and the two ends of the other reset rod (85) rest on the lower side of the first ring (81). The two ends of the third elastic member (86) are hung in the middle of the two reset rods (85). The third elastic member (86) is used to pull the first ring (81) upward to reset.

4. The device for clamping double-crown type shaft diameter blades according to claim 3, characterized in that, The third and fourth positioning slots each have two slots, which are arranged symmetrically to each other. There are also two force rods (84). The two force rods (84) are fixedly connected by a lever (87). The lever (87) is semi-circular and located on the periphery of the first ring (81) and the second ring (83). The lever (87) is used to rotate upward or downward about the line connecting the two force rods (84) as the axis, thereby driving the force rods (84) to rotate.

5. The device for clamping double-crown type shaft diameter blades according to claim 1, characterized in that, Multiple first positioning holes are arranged radially, and three third steel balls (82) are placed in each first positioning hole. The outermost third steel ball (82) is used to roll outward and leave a gap for the innermost third steel ball (82) to move, so that the innermost third steel ball (82) loosens the blade tip axis of the double-crown type blade. The outermost third steel ball (82) is also used to press the innermost third steel ball (82) inward to move inward and abut against the blade tip axis of the double-crown type blade.

6. The device for clamping double-crown type shaft diameter blades according to claim 2, characterized in that, The top opening of the second ring (83) contracts inward to form a through hole for the positioning post (63) to pass through, thereby forming a receiving cavity inside the second ring (83). The receiving cavity is provided with an upper rotating disk (88) on the upper side and a lower rotating disk (90) on the lower side. Semi-circular rotating grooves are provided on the lower side of the upper rotating disk (88) and the upper side of the lower rotating disk (90). The two rotating grooves cooperate to form a rotating cavity. Multiple fourth steel balls (89) are provided in the rotating cavity. The multiple fourth steel balls (89) are used to reduce the friction between the upper rotating disk (88) and the lower rotating disk (90). The upper rotating disk (88) and the lower rotating disk (90) cooperate to ensure that the rotation axis of the second ring (83) does not deviate when the first ring (81) moves downward under force, thereby ensuring that the first ring (81) coincides with the axis of the double-crown type shaft diameter blade when it rotates.

7. The device for clamping double-crown type shaft diameter blades according to claim 1, characterized in that, The fixed upright (62) and the rotating rod (61) are connected to each other by a positioning rod (91). The positioning rod (91) is set vertically and its lower end is locked in the fixed upright (62) by a positioning pin. The right end of the rotating rod (61) is sleeved on the positioning rod (91). The rotating rod (61) is used to move upward along the positioning rod (91) so that the top clamping mechanism (6) moves upward, thereby allowing the tip shaft of the double-crown type axial diameter blade to extend into the top clamping mechanism (6). A limit block is provided at the right end of the rotating rod (61). The limit block is fixedly connected to the upper end of the fixed upright (62). The limit block is used to abut against the right end face of the rotating rod (61) and restrict its rotation.

8. The device for clamping double-crown type shaft diameter blades according to claim 1, characterized in that, The bottom holding mechanism (7) includes: The lower support (1) has a horizontally penetrating lower receiving groove on its lower side and a fixing hole on its top. The fixing column (2) is vertically arranged, located on the upper side of the lower support (1), and integrally connected with the lower support (1). Its axis coincides with the axis of the fixing hole. The inner cavity of the fixing column (2) is used for the blade root shaft (53) of the double-crown type blade to pass through from top to bottom and extend into the lower receiving groove. The upper edge of the fixing column (2) is used to abut against the lower side of the blade root edge plate (52) of the double-crown type blade. The lower clamping mechanism (3), located in the lower receiving groove of the lower support (1), is used to clamp the lower end of the blade root shaft (53) of the double-crown type blade passing through the fixed column (2), thereby restricting the radial rotation of the double-crown type blade. The upper clamping mechanism (4) is located on the upper side of the lower support (1) and on the periphery of the fixing column (2), and is used to limit the curved surface of the root axis (53) of the double crown type blade.

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