Tool for measuring outer diameter of rotor with odd number of blades

Abstract

The utility model discloses a tool for measuring the outer diameter of a rotor with odd number of blades, which is used for measuring the outer diameter of the rotor with holes in the middle and asymmetrically distributed odd number of blades. The micro-taper mandrel and the inner hole of the rotor are in gapless fit; zero-clearance flexible rotation between the rotating stand and the mandrel is achieved through the mode that tapered roller bearings and thrust bearings are installed on the mandrel and the rotating stand. The measuring meter is fixed on the movable meter frame and moves to a required axial cross section on the rotating frame along with the meter frame; a proper scale measuring head is arranged, so that the measurement position is convenient to observe; an outer diameter reference value is determined through the meter calibration piece; and finally, obtaining the outer diameter of the odd-number blade rotor section through the reading of the measuring meter.

Description

Technical Field

[0001] The utility model relates to the field of turbojet engine measuring tools, in particular to a measuring tool for measuring the outer diameter of an odd-numbered blade rotor. Background Art

[0002] The rotor is a critical component of a turbojet or turbofan engine. The rotor blades' envelope surfaces include cylindrical, conical, and curved surfaces, requiring high precision for the rotor's cross-sectional outer diameter. To meet assembly clearance requirements, the rotor blade's cross-sectional outer diameter must be inspected both during machining and before assembly.

[0003] The number of rotor blades can be odd or even. The outer diameter of the rotor with even blades can be measured with measuring instruments such as vernier calipers, while the blades of the rotor with odd blades are asymmetrically distributed and cannot be measured directly with a vernier caliper. They cannot be tested on-site and can only be sent to the metrology room for three-coordinate testing, which has high testing costs. Utility Model Content

[0004] The purpose of this utility model is to design a turbojet engine odd-blade rotor outer diameter measuring tool in order to solve the above problems, which can quickly, conveniently and accurately detect the outer diameter of a specified section of an odd-blade rotor with a hole in the middle of the rotor.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] The utility model provides an odd-blade rotor outer diameter measuring tool, comprising a positioning mandrel, a tapered roller bearing, a bushing, a locking nut, a flange shoulder nut, a thrust ball bearing, a rotating frame, two hexagon socket screws, a movable table frame, a gauge and one hexagon socket screw; the rotating frame is connected to the positioning mandrel through the tapered roller bearing and rotates around the positioning mandrel, and a sliding groove is provided at the other end, along which the movable table frame slides, and the gauge is fixed on the movable table frame; the inner ring of the tapered roller bearing is press-fitted onto the rear end of the positioning mandrel by an interference fit, and the large end of the inner ring is close to the positioning mandrel. The shaft end face, outer ring, and rotating frame inner bore are fitted onto the outer ring of the tapered roller bearing with an interference fit. The outer diameter of the loose ring of the thrust ball bearing is mounted on the inner bore of the bushing with a transition fit, and the tight ring is mounted on the positioning mandrel with a transition fit. A flange shoulder nut mounted on the positioning mandrel applies axial pressure to the thrust ball bearing, transmitting force to the outer ring end face of the tapered roller bearing through the bushing, pre-tightening the tapered roller bearing to zero clearance. The locking nut locks the flange shoulder nut to ensure it is locked and does not loosen. The hexagon socket screw secures the gauge to the movable gauge frame. During measurement, the rotor's outer diameter to be measured is first calibrated with a calibration piece. The gauge is then wound around the mandrel once to obtain the rotor's cross-sectional outer diameter measurement.

[0007] As a preferred embodiment of the present invention, the positioning mandrel has a slight taper at one end and a two-step cylinder with an external thread at the other end. The slight taper of the positioning mandrel creates a gapless fit, ensuring that the center of the measuring tool and the center of the rotor coincide. Furthermore, the diameters of the front portion of the mandrel are grouped according to the rotor aperture tolerance, ensuring that the axial position of the slightly taper mandrel exposed to the hole is within a certain range, ensuring that the mandrel can position the entire length of the hole without gaps.

[0008] As a preferred embodiment of the present invention, the inner ring of the tapered roller bearing is press-fitted onto the rear end of the mandrel using an interference fit, with the large end of the inner ring abutting the end face of the mandrel. The outer ring and the inner hole of the rotating frame are sleeved onto the outer ring of the tapered roller bearing using an interference fit. The outer circle of the loose ring of the thrust bearing is mounted on the inner hole of the bushing using a transition fit, and the tight ring is also mounted on the mandrel using a transition fit. A flange shoulder nut mounted on the mandrel applies axial pressure to the thrust bearing, which is then transmitted to the end face of the outer ring of the tapered roller bearing through the bushing, pre-tightening the tapered roller bearing to achieve zero clearance and flexible rotation.

[0009] As a preferred embodiment of the present invention, there are three stepped holes on the bushing, the diameter of the small hole is larger than the diameter of the positioning core shaft by 1mm, the second stepped hole is tightly matched with the diameter of the thrust ball bearing seat ring, and the third stepped hole is larger than the diameter of the thrust shaft ball bearing seat ring by 1mm.

[0010] As a preferred embodiment of the present invention, a bearing mounting hole is provided at the lower end of the rotating frame, a connecting rod is provided in the middle, and a sliding groove and a threaded hole symmetrical with the axis of the tapered roller bearing mounting hole are opened at the upper end, and the center of the sliding groove is symmetrical with the axis of the lower end hole.

[0011] As a preferred embodiment of the present invention, the movable meter frame is equipped with a sliding boss, a waist-shaped groove, and a circular hole for inserting the meter rod. The circular hole is symmetrical with the centerline of the sliding boss, and two threaded holes are provided on the side of the circular hole. The sliding boss and the sliding groove are fitted with a clearance of less than 0.01mm. The meter rod and the circular hole have a clearance of 0.01mm. This method allows the movable meter frame to be moved, with the axis of the meter hole passing through the center of the positioning mandrel.

[0012] As a preferred embodiment of the present invention, the meter includes a meter probe, a gasket, a movable meter rod, and a fixed meter rod. The meter probe is arranged on the movable meter rod, the gasket is located between the meter probe and the movable meter rod, and the movable meter rod is arranged in the fixed meter rod and movably connected.

[0013] As a preferred embodiment of the present invention, the gauge probe is manufactured into an asymmetric flat-top V-shape with a V-bottom width of 0.5mm. During measurement, the flat top of the V-shape is perpendicular to the axis of the mandrel, ensuring a certain degree of rigidity of the probe while facilitating observation of the axial position of the blade at the measurement point. An adjustment washer is added between the gauge stem and the probe. By varying the thickness of the washer, the flat top of the V-shaped probe can be adjusted to form different angles with the dial. The inspector can adjust the direction between the gauge dial and the V-shaped probe according to the needs of convenient reading.

[0014] As a preferred embodiment of the present invention, the calibration piece is formed into a U-shape, with the U-shape depth T = MR (the distance M between the lower plane of the movable gauge frame and the axis of the core shaft, R being 1 / 2 of the diameter to be measured). During calibration, the upper plane of the U-shaped piece contacts the lower plane of the movable gauge frame, and the reading zero point of the gauge dial is adjusted. At this time, the reading zero point value of the gauge is 1 / 2 of the measured outer diameter. This value multiplied by 2 is the outer diameter reference value.

[0015] The beneficial effects of the utility model are that the measuring tool can quickly, conveniently and accurately detect the outer diameters of multiple sections of an odd-numbered blade rotor, shorten the detection cycle and reduce the detection cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the odd-blade rotor outer diameter measuring tool of the utility model;

[0017] Figure 2 This is a schematic structural diagram of the positioning core shaft in the odd-blade rotor outer diameter measuring tool of the present utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the bushing in the odd-blade rotor outer diameter measuring tool of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the rotating frame in the odd-blade rotor outer diameter measuring tool of the utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the movable table frame in the odd-blade rotor outer diameter measuring tool of the utility model;

[0021] Figure 6 This is a schematic structural diagram of area A in the odd-blade rotor outer diameter measuring tool of the present invention;

[0022] Figure 7 This is a schematic diagram of the structure of the gauge probe in the odd-blade rotor outer diameter measuring tool of the utility model;

[0023] Figure 8 This is a schematic diagram of the structure of the gasket in the odd-blade rotor outer diameter measuring tool of the utility model;

[0024] Figure 9This is a schematic structural diagram of the calibration component of the odd-blade rotor outer diameter measuring tool of the present invention;

[0025] In the figure: 1- gauge probe, 2- washer, 3- movable gauge rod, 4- fixed gauge rod, 5- hexagon socket screw 1, 6- gauge, 7- movable gauge frame, 8- hexagon socket screw 2, 9- swivel frame, 10- thrust ball bearing, 11- flange shoulder nut, 12- lock nut, 13- bushing, 14- tapered roller bearing, 15- positioning mandrel, 16- bearing mounting hole, 17- sliding groove, 18- threaded hole 1, 19- sliding boss, 20- waist-shaped groove, 21- round hole, 22- threaded hole 2. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the embodiments of the present invention. It should be understood that the described embodiments are only a portion of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0029] In the description of the present utility model, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use, or are directions or positional relationships commonly understood by those skilled in the art. These directions or positional relationships are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present utility model.

[0030] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0031] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0032] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings.

[0033] Example 1

[0034] like Figure 1-9 As shown, this embodiment provides an odd-blade rotor outer diameter measuring tool, including a positioning core shaft 15, a tapered roller bearing 14, a bushing 13, a locking nut 12, a flange shoulder nut 11, a thrust ball bearing 10, a rotating frame 9, a second hexagon socket screw 8, a movable meter frame 7, a gauge 6, and a first hexagon socket screw 5; the rotating frame 9 is connected to the positioning core shaft 15 through the tapered roller bearing 14, and rotates around the positioning core shaft 15. The other end is provided with a sliding groove, and the movable meter frame 7 slides along this groove, and the gauge 6 is fixed on the movable meter frame 7; the inner ring of the tapered roller bearing 14 is press-fitted onto the rear end of the positioning core shaft 15 by an interference fit, and the large end of the inner ring is close to the positioning core shaft. The end face of the shaft 15, the outer ring and the inner hole of the rotating frame 9 are sleeved on the outer ring of the tapered roller bearing 14 with an interference fit; the outer circle of the loose ring of the thrust ball bearing 10 is installed on the inner hole of the bushing 13 in a transition fit manner, and the tight ring is installed on the positioning core shaft 15 in a transition manner; the thrust ball bearing 10 is axially pressurized by the flange shoulder nut 11 installed on the positioning core shaft 15, and the force is transmitted to the outer ring end face of the tapered roller bearing 14 through the bushing 13, so as to pre-tighten the tapered roller bearing 14 and form zero clearance; the locking nut 12 locks the flange shoulder nut 11 to ensure that the flange shoulder nut 11 is locked and not loose; the hexagon socket screw 5 fixes the gauge 6 to the movable gauge frame 7.

[0035] As a preferred embodiment of the present invention, the positioning mandrel 15 has a slight taper at one end and a two-step cylinder with an external thread at the other end. The slight taper of the positioning mandrel 15 creates a gapless fit, ensuring that the center of the measuring tool and the center of the rotor coincide. Furthermore, the diameters of the front portion of the positioning mandrel 15 are grouped according to the tolerance of the rotor aperture, ensuring that the axial position of the slightly taper positioning mandrel 15 exposed to the aperture is within a certain range, ensuring that the positioning mandrel 15 can perform its positioning function along the entire length of the aperture, creating a gapless fit.

[0036] As a preferred embodiment of the present invention, the inner ring of the tapered roller bearing 14 is press-fitted onto the rear end of the positioning mandrel 15 using an interference fit, with the large end of the inner ring abutting the end face of the positioning mandrel 15. The outer ring and the inner hole of the rotating frame 9 are sleeved onto the outer ring of the tapered roller bearing 14 using an interference fit. The outer circle of the loose ring of the thrust ball bearing 10 is mounted on the inner hole of the bushing 13 in a transitional fit, and the tight ring is also mounted on the positioning mandrel 15 in a transitional fit. The thrust ball bearing 10 is axially pressed by the flange shoulder nut 11 mounted on the positioning mandrel 15, and the force is transmitted to the outer ring end face of the tapered roller bearing 14 through the bushing 13, thereby pre-tightening the tapered roller bearing 14 to form zero clearance and flexible rotation.

[0037] As a preferred embodiment of the present invention, there are three stepped holes on the bushing 13, the diameter of the small hole is greater than the diameter of the positioning core shaft 15 at the matching point by 1 mm, the second stepped hole is tightly matched with the diameter of the thrust ball bearing 10 seat ring, and the third stepped hole is greater than the diameter of the thrust ball bearing 10 seat ring by 1 mm.

[0038] As a preferred embodiment of the present invention, a bearing mounting hole 16 is provided at the lower end of the rotating frame 9, a connecting rod is provided in the middle, and a sliding groove 17 and a threaded hole 18 are provided at the upper end, which are symmetrical with the axis of the mounting hole of the tapered roller bearing 14, and the center of the sliding groove 17 is symmetrical with the axis of the lower end hole.

[0039] As a preferred embodiment of the present invention, the movable meter frame 7 is equipped with a sliding boss 19, a waist-shaped groove 20, and a circular hole 21 for inserting the meter rod. The circular hole 21 is symmetrical with the centerline of the sliding boss 19, and a second threaded hole 22 is provided on the side of the circular hole 21. The sliding boss 19 and the sliding groove 17 are fitted with a clearance of less than 0.01 mm, while the meter rod and the circular hole 21 have a clearance of 0.01 mm. This method allows the movable meter frame 7 to be moved, with the axis of the meter hole passing through the center of the positioning mandrel 15.

[0040] As a preferred embodiment of the present invention, the gauge 6 includes a gauge probe 1, a washer 2, a movable gauge stem 3, and a fixed gauge stem 4. The gauge probe 1 is disposed on the movable gauge stem 3, the washer 2 is located between the gauge probe 1 and the movable gauge stem 3, and the movable gauge stem 3 is disposed within the fixed gauge stem 4 and movably connected thereto. During measurement, the rotor outer diameter to be measured is first calibrated using a calibration device. The gauge 6 then rotates once around the positioning mandrel 15, and the rotor cross-sectional outer diameter measurement value is obtained from the gauge.

[0041] As a preferred embodiment of the present invention, the gauge probe 1 is fabricated into an asymmetric flat-top V-shape with a V-shaped base width of 0.5mm. During measurement, the flat top of the V is perpendicular to the axis of the mandrel, ensuring a certain degree of rigidity for the probe while facilitating observation of the axial position of the blade being measured. An adjustment washer 2 is provided between the gauge stem and the probe. By varying the thickness of the washer 2, the flat top of the V-shaped probe forms different angles with the dial. The inspector can adjust the direction between the gauge dial and the V-shaped probe 1 as needed for convenient reading.

[0042] The measurement steps are as follows:

[0043] Step 1: The positioning core shaft 15 is connected to the rotating frame 9 through the tapered roller bearing 14 to form a zero-clearance and relatively rotatable structure. Figure 1 As shown, the inner ring of the tapered roller bearing 14 is press-fitted with a small interference fit onto the step at the first small end of the core shaft 15. The large end of the inner ring abuts the shaft shoulder, ensuring no axial or radial displacement relative to the positioning core shaft 15. The inner bore of the rotating frame 9 is press-fitted with a small interference fit onto the outer ring of the tapered roller bearing 14. The outer diameter of the seat ring of the thrust ball bearing 10 is tightly fitted into the inner bore of the bushing 13. The outer diameter of the bushing 13 is then installed into the inner bore of the rotating frame 9 with a small clearance fit. The assembly is then mounted on the small end of the positioning mandrel 15. The retainer, balls, and collar of the thrust ball bearing 10 are then installed. The flange nut 11 is then screwed onto the external thread of the positioning mandrel 15. An appropriate torque is applied to sequentially transmit force through the flange end face of the flange nut 11 to the end face of the thrust ball bearing 10, the bushing 13, and the outer ring of the tapered roller bearing 14. This creates a certain preload on the outer ring, rollers, and inner ring of the tapered roller bearing 14, allowing for seamless and flexible rotation. Finally, the flange nut 11 is tightened with the lock nut 12 to ensure it remains secure. This method creates a seamless and freely rotatable gap between the turret 9 and the positioning mandrel 15.

[0044] Step 2: Move the movable meter frame 7, and the meter 6 installed on the movable meter frame 7 is in the blade axial section measurement position. Figure 1 As shown, the upper end of the rotating frame 9 has a sliding groove 17 and a threaded hole 18 symmetrical with respect to the axis of the lower end hole, and the upper plane is parallel to the axis of the lower end hole; the movable table frame 7 has a waist-shaped groove 20 and a sliding boss 19, and the sliding boss 19 can slide along the sliding groove 17 on the rotating frame 9 to reach the axial position required for measurement, and then be locked with the hexagon socket screw 8.

[0045] Step 3: The contact condition of the probe at the axial position of the blade is easy to observe and read the data indicated by the dial pointer. Figure 1 As shown, the gauge probe 1 is fabricated into an asymmetrical flat-top V-shape, perpendicular to the rotor axis and with a top width of 0.5 mm. The flat top increases the circumferential contact width between the probe and the blade. The asymmetric V-shape facilitates alignment with the axial position when measuring the outer diameter of the rotor blade mid-section, facilitating observation and operation. Depending on the measurement situation and the operator or inspector's desired observation orientation, the required angle between the gauge probe 1 and the dial of the gauge 6 will vary. Washers 2 of varying thicknesses are screwed between the gauge probe 1 and the movable gauge stem 3 to adjust the angle to the desired observation angle.

[0046] Step 4: Use the calibration tool to determine the initial value of the outer diameter R. Figure 1As shown, the movable meter frame 7 is made with a hole symmetrical to the center of the sliding boss, which is slidably matched with the fixed meter rod 4 of the meter 6. The hole is perpendicular to the lower plane of the movable meter frame 7. The distance M between the lower plane and the center line of the positioning core shaft 9 is measured in advance and marked on the rotating frame. Figure 9 As shown, the calibration piece is U-shaped, with a depth T = MR (R = 1 / 2 of the diameter to be measured). The actual measured value is also pre-measured and laser-marked on the calibration piece. During calibration, first select a U-shaped calibration piece with the appropriate depth based on the measured rotor cross-section outer diameter. Based on the measured value, calculate the error ±α between R and (MT). During calibration, the dial pointer is positioned at the ±α scale mark to eliminate reading errors and set the zero point at the R value. The piece is then secured with a hexagon socket screw 5.

[0047] Step 5: Align the center of the measuring tool with the center of the rotor inner hole. Figure 1 As shown, the outer portion of the large end of the positioning core shaft 15 is slightly tapered, and the core shaft 9 is inserted into the rotor hole to play a gapless centering role, and the center of the measuring tool coincides with the center of the rotor inner hole.

[0048] Step 6: Measure the actual value of the blade outer diameter. Figure 1 As shown, while the positioning mandrel 15 is being inserted into the inner hole of the rotor, the gauge moves forward along the blade slot along with the rotating frame 9. When the positioning mandrel 15 is inserted into the rotor hole and is in place, there is no gap. Rotate the rotating frame 9 so that the probe is located on the blade; loosen Figure 2 The second hexagon socket screw 8 moves the movable table frame 7 so that the meter probe 1 is located at the axial position of the blade to be measured. Then, the meter rotates one circle with the rotating frame 9 and obtains the outer diameter of the rotor cross section from the meter 6.

[0049] Step 7: Repeat steps 4 to 6 to measure the outer diameters of other sections of the rotor.

[0050] Although the present invention is described herein with reference to the illustrative embodiments of the present invention, the above embodiments are merely preferred embodiments of the present invention, and the embodiments of the present invention are not limited to the above embodiments. It should be understood that those skilled in the art can design many other modifications and implementations, which will fall within the scope and spirit of the principles disclosed in this application.

Claims

1. An odd-blade rotor outer diameter measuring tool, characterized by: The invention comprises a positioning core shaft (15), a tapered roller bearing (14), a bushing (13), a locking nut (12), a flange shoulder nut (11), a thrust ball bearing (10), a rotating frame (9), two hexagon socket screws (8), a movable table frame (7), a gauge (6), and one hexagon socket screw (5); the rotating frame (9) is connected to the positioning core shaft (15) through the tapered roller bearing (14) and rotates around the positioning core shaft (15); a sliding groove is provided at the other end, and the movable table frame (7) slides along the groove, and the gauge (6) is fixed on the movable table frame (7); the inner ring of the tapered roller bearing (14) is press-fitted on the rear end of the positioning core shaft (15) by an interference fit, and the large end of the inner ring is close to the end face of the positioning core shaft (15), and the outer ring is fixed to the rear end of the positioning core shaft (15). The ring and the inner hole of the rotating frame (9) are sleeved on the outer ring of the tapered roller bearing (14) by using an interference fit; the outer circle of the loose ring of the thrust ball bearing (10) is installed on the inner hole of the bushing (13) in a transition fit manner, and the tight ring is installed on the positioning core shaft (15) in a transition manner; the thrust ball bearing (10) is axially pressed by the flange shoulder nut (11) installed on the positioning core shaft (15), and the force is transmitted to the outer ring end face of the tapered roller bearing (14) through the bushing (13), so as to pre-tighten the tapered roller bearing (14) and form zero clearance; the locking nut (12) locks the flange shoulder nut (11) to ensure that the flange shoulder nut (11) is locked and does not loosen; the hexagon socket screw (5) fixes the meter (6) on the movable meter frame (7).

2. The odd-blade rotor outer diameter measuring tool according to claim 1, characterized in that: The gauge (6) comprises a gauge probe (1), a washer (2), a movable gauge rod (3), and a fixed gauge rod (4); the gauge probe (1) is arranged on the movable gauge rod (3); the washer (2) is located between the gauge probe (1) and the movable gauge rod (3); and the movable gauge rod (3) is arranged in the fixed gauge rod (4) and is movably connected.

3. The odd-blade rotor outer diameter measuring tool according to claim 2, characterized in that: The gauge probe (1) is in an asymmetrical V-shaped flat top shape.

4. The odd-blade rotor outer diameter measuring tool according to claim 1, characterized in that: One end of the positioning core shaft (15) is slightly tapered, and the other end is a two-step cylinder and a section of external thread.

5. The odd-blade rotor outer diameter measuring tool according to claim 1, characterized in that: The bushing (13) has three stepped holes, the diameter of the small hole is larger than the diameter of the positioning core shaft (15) by 1mm, the second stepped hole is tightly matched with the diameter of the thrust ball bearing (10) seat ring, and the third stepped hole is larger than the diameter of the thrust ball bearing (10) seat ring by 1mm.

6. The odd-blade rotor outer diameter measuring tool according to claim 1, characterized in that: The rotating frame (9) is provided with a bearing mounting hole (16) at the lower end, a connecting rod at the middle part, a sliding groove (17) and a threaded hole (18) at the upper end, and the center of the sliding groove (17) is symmetrical with the axis of the bearing mounting hole (16) at the lower end.

7. The odd-blade rotor outer diameter measuring tool according to claim 1, characterized in that: The movable meter frame (7) is provided with a sliding boss (19), a waist-shaped groove (20), and a circular hole (21) for fixing the meter (6), and a second threaded hole (22) is provided on the side of the circular hole (21).

Images