Compressor rotor blade tip size measuring device

Abstract

The invention belongs to the technical field of machining and manufacturing, and particularly relates to a gas compressor rotor blade tip size measuring device which comprises a reinforced magnetic gauge stand, a suspension support is connected to the middle of the upper surface of the reinforced magnetic gauge stand, the suspension support is of an L-shaped structure, and a through hole is formed in the middle of the upper surface of the suspension support; the reinforced magnetic gauge stand can be tightly adsorbed on metal surfaces of a machine tool workbench, a measuring platform and the like by virtue of strong magnetic adsorption capacity, so that a stable bottom support is formed, the conditions of displacement, sliding and the like of the device in the measuring process are avoided, and a stable foundation is laid for all subsequent adjusting and measuring links; and the damping bracket between the suspension bracket and the spherical cavity can effectively absorb external vibration of an industrial field, prevent the vibration from being transmitted to a measuring structure through an elastic buffering effect, avoid measuring head offset or data fluctuation caused by the vibration, and reduce factors which interfere with the measuring precision from the source.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of mechanical processing and manufacturing, in particular to a compressor rotor tip size measuring device. BACKGROUND

[0002] In gas turbine manufacturing, the compressor rotor is an extremely important component in the compressor. Air enters the low pressure compressor through the intake device and is compressed there. Then the air enters the high pressure compressor where it is compressed to the required parameters. The compressed air from the high pressure compressor enters the flame tube in the combustion chamber, mixes with the fuel and burns.

[0003] In recent years, gas turbine manufacturing technology has developed rapidly. In order to ensure the appropriate air compression ratio in the gas generator, the gap between the compressor rotor tip and the inner wall of the compressor casing is particularly important, which requires high precision machining to achieve the purpose. However, due to the limitations of machine tools, costs and other conditions, some tasks of processing the tip size fall on the medium and large horizontal lathes and grinding machines. Moreover, since many tip sizes have angle requirements, the angled blade needs to be measured first from the fixed reference surface on the rotor to determine an axial size, and then the outer diameter size of the point on the fixed axial size point is measured. At present, after discussing multiple measurement schemes with professional measuring tool manufacturers, there is no effective special measuring tool that can guarantee the precision of the outer diameter size of the point on the inclined surface.

[0004] Therefore, the present application provides a compressor rotor tip size measuring device. SUMMARY

[0005] In order to make up for the deficiencies of the prior art and solve at least one technical problem raised in the background art.

[0006] The technical solution adopted by this invention to solve its technical problem is as follows: A compressor rotor blade tip size measuring device of this invention includes a reinforced magnetic base. A suspension bracket is connected to the middle of the upper surface of the reinforced magnetic base. The suspension bracket has an L-shaped structure. A through hole is opened in the middle of the upper surface of the suspension bracket. A shock-absorbing bracket is placed on the top surface of the L-shaped structure of the suspension bracket. The lower surface of the shock-absorbing bracket corresponds to the through hole on the surface of the suspension bracket. A spherical cavity is connected through the through hole on the surface of the suspension bracket. A locking stop is provided on the upper surface of the spherical cavity. The spherical cavity has an extension end at the bottom of its lower surface, which extends through to the bottom of the through hole and is attached to the lower surface of the suspension bracket by a nut. A tubular component is movably sleeved on the outer arc surface of the spherical cavity. A spherical ring plate is provided on the lower end face of the tubular component, which abuts against the surface of the spherical cavity. A limiting ring is provided in the middle of the inner arc surface of the tubular component. One end of the snap-fit ​​stop is snapped into the inner arc surface of the tubular component. An installation groove is opened on one side of the outer arc surface of the tubular component. The bottom of the outer arc surface of the spherical cavity is placed on the surface of the shock-absorbing bracket.

[0007] A shaft is movably connected through the mounting groove along one side of the tubular component. A pin protrusion is fixedly installed at one end of the shaft in the mounting groove. A swing arm is movably connected to one side surface of the pin protrusion. The swing arm is placed on one side of the suspension bracket. A locking component is fixedly installed on the end face of the swing arm away from the pin protrusion.

[0008] The locking assembly includes a ball seat body fixedly installed on one side of the swing arm. A base is threaded to the bottom of the inner arc surface of one side of the ball seat body. A main knob is sleeved on one side of the outer arc surface of the ball seat body. A fixing nut is connected to the middle of the upper surface of the main knob. A protrusion is provided on the inner arc surface of the main knob.

[0009] One end of the protrusion extends into the interior of the ball seat body. The inner arc surface of the protrusion is fitted with a locking top plate. One end of the locking top plate extends into the interior of the ball seat body. A locking pressure block is fixedly installed on one end of the locking top plate. A universal ball joint is movably engaged at the top of the inner arc surface of the ball seat body.

[0010] A damping ring is fitted onto the bottom surface of the outer arc of the universal ball joint. The lower surface of the damping ring has a contact portion. The upper surface of the locking block has a groove. The top of the locking block has a trapezoidal platform. One end of the trapezoidal platform is engaged with the contact portion surface under the damping ring.

[0011] A spring is fixedly installed in the groove of the locking block, and the end of the spring away from the locking block is fixedly installed on the contact part. The damping ring is pressed against the outer arc surface of the universal ball joint.

[0012] A base plate is fixedly installed on one end face of the universal ball joint. A transition arc plate is provided on one side surface of the base plate. A sliding arc groove is opened on one side surface of the transition arc plate. A connecting rod is slidably engaged on the inner arc surface of the sliding arc groove.

[0013] One bottom surface of the adapter arc plate is movably connected to a connecting sleeve via a pivot. A hanging lug is provided on one edge of the upper surface of the connecting sleeve. A rocker plate is movably connected to one side surface of the hanging lug via a pivot.

[0014] One end of the rocker plate is connected to the connecting rod, the inner arc surface of the connecting sleeve is connected to the dial indicator rod, the outer arc surface of the dial indicator rod is fitted with the actuating arm, and a dial indicator is fixedly installed on one side of the actuating arm.

[0015] The beneficial effects of this invention are as follows: 1. The reinforced magnetic base, with its strong magnetic adsorption capability, can be tightly adsorbed onto metal surfaces such as machine tool worktables and measuring platforms, forming a stable bottom support. This prevents the device from shifting or sliding during the measurement process, laying a stable foundation for all subsequent adjustments and measurements. Furthermore, the shock-absorbing bracket between the suspension bracket and the spherical cavity can effectively absorb external vibrations in the industrial environment. Through elastic buffering, it blocks the transmission of vibrations to the measuring structure, avoiding probe offset or data fluctuations caused by vibration, and reducing factors that interfere with measurement accuracy from the source.

[0016] 2. The universal ball joint allows for omnidirectional and arbitrary angle adjustment, flexibly adapting to any angle, whether the blade tip slope is acute, obtuse, or irregularly inclined. This enables subsequent testing components to precisely align with the measurement angle. Combined with the arc-shaped sliding of the connecting rod within the sliding groove and the telescopic adjustment of the dial indicator rod, a multi-level fine-tuning system is formed. This system can precisely calibrate the attitude of the dial indicator probe, ensuring that the probe and the blade tip slope are completely perpendicular and in contact. This solves the problem of dimensional measurement errors caused by inaccurate slope contact and angle calibration deviations in traditional measurements.

[0017] 3. The locking assembly uses a main knob and a fixing nut. The main knob pushes the locking block through the protrusion on the inner wall, causing the damping ring to press tightly against the surface of the universal ball joint. The friction force is used to initially fix the angle. Subsequently, the fixing nut is used to lock the position of the main knob, forming a secondary anti-loosening guarantee. This double locking structure can firmly fix the adjusted angle, avoid attitude deviation caused by vibration or slight collision during the measurement process, prevent data drift, and ensure that the device remains stable during the measurement process, meeting the stringent requirements of compressor clearance control for machining accuracy. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is an overall perspective view of the present invention; Figure 2 This is a diagram illustrating the top structure of the reinforced magnetic base of the present invention; Figure 3 This is the overall planar front view of the present invention; Figure 4 This is a schematic diagram of the cross-sectional structure of the spherical cavity in this invention; Figure 5 This is a schematic diagram of the swing arm structure in this invention; Figure 6 This is a cross-sectional structural diagram of the locking assembly in this invention; Figure 7 This is a schematic diagram of the transition arc plate structure of the present invention; Figure 8 This is a schematic diagram of the structure of the watchmaking rod in this invention.

[0020] In the diagram: 1. Reinforced magnetic base; 2. Suspension bracket; 3. Shock-absorbing bracket; 4. Spherical cavity; 401. Snap-fit ​​stop; 402. Extension end; 5. Along the tubular component; 501. Spherical ring plate; 502. Limiting ring; 503. Mounting groove; 6. Pin shaft and convex plate; 7. Swing arm; 8. Locking assembly; 81. Ball seat body; 82. Base; 83. Main knob; 831. Protrusion; 832. Fixing nut; 84. Locking top plate; 85. Locking pressure block; 851. Trapezoidal platform; 86. Universal ball joint; 87. Damping ring; 871. Contact part; 88. Spring; 9. Base support plate; 10. Transition arc plate; 101. Sliding arc groove; 11. Connecting rod; 12. Connecting sleeve; 13. Hanging lug; 14. Warping plate; 15. Dial indicator lever; 16. Actuating arm; 17. Dial indicator. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] like Figures 1 to 4As shown, this embodiment of the invention includes a reinforced magnetic base 1. A suspension bracket 2 is connected to the middle of the upper surface of the reinforced magnetic base 1. The suspension bracket 2 is L-shaped and has a through hole in the middle of its upper surface. A shock-absorbing bracket 3 is placed on the top surface of the L-shaped structure of the suspension bracket 2. The lower surface of the shock-absorbing bracket 3 corresponds to the through hole on the surface of the suspension bracket 2. A spherical cavity 4 is connected through the through hole on the surface of the suspension bracket 2. The upper surface of the spherical cavity 4 is provided with a locking part 401, and the bottom of the lower surface of the spherical cavity 4 is provided with an extension end 402. The extension end 402 at the bottom of the cavity 4 extends through to the bottom surface of the through hole and is attached to the lower surface of the suspension bracket 2 by a nut. The outer arc surface of the spherical cavity 4 is movably sleeved with the tubular member 5. A spherical ring plate 501 is provided along the lower end surface of the tubular member 5. The spherical ring plate 501 abuts against the surface of the spherical cavity 4. A limiting ring 502 is provided in the middle of the inner arc surface of the tubular member 5. One end of the locking stop 401 is locked into the inner arc surface of the tubular member 5. An installation groove 503 is opened on one side of the outer arc surface of the tubular member 5. The bottom of the outer arc surface of the spherical cavity 4 is placed on the surface of the shock-absorbing bracket 3.

[0023] The reinforced magnetic base 1 has a built-in strong magnetic adsorption structure, which adsorbs onto flat metal surfaces such as machine tool worktables and measuring platforms. The strong magnet is activated by a magnetic locking switch, forming a stable bottom support. The suspension bracket 2 adopts an integrated L-shaped structure design. Its horizontal section is fastened to the middle of the upper surface of the reinforced magnetic base 1 by bolts, and the vertical section extends upward to form a flat mounting support surface. A through hole is opened in the middle of the support surface. The shock-absorbing bracket 3 is made of elastic and wear-resistant material and fits snugly on the top surface of the L-shaped structure of the suspension bracket 2, and is directly opposite the position of the through hole. When the spherical cavity 4 is installed through, its bottom outer arc surface is in close contact with the shock-absorbing bracket 3. The elastic deformation of the shock-absorbing bracket 3 absorbs external vibrations and blocks the transmission of vibrations to the subsequent measuring structure, ensuring that the measurement accuracy is not disturbed.

[0024] The snap-fit ​​stop 401 at the top of the spherical cavity 4 is an annular protrusion structure, and the limiting ring 502 along the middle of the inner wall of the tubular component 5 is an annular groove. The two are snapped together by the protrusion and groove, allowing the tubular component 5 to rotate freely around the outer arc surface of the spherical cavity 4, while preventing axial separation. This provides flexible space for subsequent measurement and orientation adjustment. The spherical ring plate 501 along the lower end face of the tubular component 5 is an arc-shaped fitting structure that is perfectly matched with the outer arc surface of the spherical cavity 4. It remains tightly fitted during rotation, effectively preventing shaking along the tubular component 5 and ensuring the stability of the adjustment process.

[0025] The operator can manually push the tubular component 5 to rotate it within a range of 0°-90° around the outer arc surface of the spherical cavity 4. By rotating, the tilt angle of the tubular component 5 is changed, initially adapting it to the installation height and measurement orientation of the compressor rotor. The arc-shaped fit design of the spherical ring plate 501 and the spherical cavity 4 ensures uniform force during rotation, avoids jamming, and maintains the axial stability of the tubular component 5. The mounting groove 503 on one side of the tubular component 5 has a U-shaped opening structure, with an internal shaft and pin protrusion 6 fixedly connected. One end of the swing arm 7 is movably connected to the pin protrusion 6 by a hinge, allowing it to swing horizontally or vertically within a range of 0-180° around the shaft. By pushing the swing arm 7, the operator moves the locking component 8 at its end. Combined with the angle adjustment along the tubular component 5, the locking component 8 is coarsely positioned in three-dimensional space, so that the subsequent test results are initially aligned with the preset measurement area of ​​the compressor rotor blade tip.

[0026] like Figure 5 and Figure 6 As shown, a shaft is movably connected through the mounting groove 503 on one side of the tubular component 5. A pin convex plate 6 is fixedly installed at one end of the shaft in the mounting groove 503. A swing arm 7 is movably connected to one side surface of the pin convex plate 6. The swing arm 7 is placed on one side of the suspension bracket 2. A locking assembly 8 is fixedly installed on the end face of the swing arm 7 away from the pin convex plate 6.

[0027] The locking assembly 8 includes a ball seat body 81 fixedly installed on one side of the swing arm 7. A base 82 is threadedly connected to the bottom of the inner arc surface of one side of the ball seat body 81. A main knob 83 is sleeved on one side of the outer arc surface of the ball seat body 81. A fixing nut 832 is connected to the middle of the upper surface of the main knob 83. A protrusion 831 is provided on the inner arc surface of the main knob 83. One end of the protrusion 831 extends into the interior of the ball seat body 81. A locking top plate 84 is fitted and connected to the inner arc surface of the protrusion 831. One end of the locking top plate 84 extends into the interior of the ball seat body 81. A locking pressure block is fixedly installed on one end of the locking top plate 84. The top of the inner arc surface of the ball seat body 81 is movably engaged with a universal ball joint 86. A damping ring 87 is fitted onto the bottom surface of the outer arc surface of the universal ball joint 86. The lower surface of the damping ring 87 is provided with a contact part 871. The upper surface of the locking block 85 is provided with a groove. The top of the locking block 85 is provided with a trapezoidal platform 851. One end of the trapezoidal platform 851 is engaged with the surface of the contact part 871 under the damping ring 87. A spring 88 is fixedly installed in the groove of the locking block 85. The end of the spring 88 away from the locking block 85 is fixedly installed on the contact part 871. The damping ring 87 is pressed against the outer arc surface of the universal ball joint 86.

[0028] The ball seat body 81 of the locking assembly 8 is a hollow spherical cavity 4 structure. The universal ball joint 86 installed inside is composed of a solid ball and a connecting shaft. The ball can rotate 360° at any angle within the ball seat body 81. The operator can manually rotate the connecting shaft of the universal ball joint 86 to drive the subsequent base support plate 9, transition arc plate 10 and detection components to rotate synchronously, adapting to the slope angle of the compressor rotor blade tip. The blade tip slope can be acute, obtuse or irregular, and can be adjusted by the multi-angle of the universal ball joint 86 to keep the detection end perpendicular or in contact with the slope.

[0029] After the universal joint 86 is adjusted to the target angle, turn the main knob 83 clockwise. The main knob 83 engages with the outer arc surface of the ball seat body 81 through the inner arc thread. When it is turned, the wedge-shaped protrusion 831 on its inner wall pushes into the ball seat body 81, pushing the locking top plate 84 to slide upward along the inner wall of the ball seat body 81. The top of the locking top plate 84 is fixedly connected to the locking pressure block 85, which simultaneously drives the locking pressure block 85 to move upward. The trapezoidal platform 851 at the top of the locking pressure block 85 fits against the contact part 871 at the bottom of the damping ring 87. As the trapezoidal platform 851 continues to rise, the damping ring 87 is pressed against the outer arc surface of the universal joint 86. The angle of the universal joint 86 is fixed by the friction between the damping ring 87 and the ball, ensuring that the adjusted angle does not shift.

[0030] If a secondary angle adjustment is required, turn the main knob 83 counterclockwise. The protrusion 831 will retract, the locking top plate 84 will lose its thrust, and the spring 88 in the groove of the locking block 85 will release its elastic potential energy, pulling the locking block 85 downward to reset. The pressure between the damping ring 87 and the universal ball joint 86 will disappear, and the universal ball joint 86 will return to its rotatable state. After the angle is finally determined, tighten the fixing nut 832 on the upper surface of the main knob 83. The fixing nut 832 is locked to the main knob 83 by the thread, preventing the main knob 83 from loosening due to vibration during the measurement process, and further ensuring the stability of the angle.

[0031] like Figure 7 and Figure 8 As shown, a base plate 9 is fixedly installed on one end face of the universal ball joint 86. A transition arc plate 10 is provided on one side surface of the base plate 9. A sliding arc groove 101 is opened on one side surface of the transition arc plate 10. A connecting rod 11 is slidably engaged on the inner arc surface of the sliding arc groove 101. A connecting sleeve 12 is movably connected to one bottom surface of the transition arc plate 10 through a rotating shaft. A hanging ear 13 is provided on one edge of the upper surface of the connecting sleeve 12. A rocker plate 14 is movably connected to one side surface of the hanging ear 13 through a rotating shaft. One end of the rocker plate 14 is connected to the connecting rod 11. A dial indicator rod 15 is connected to the inner arc surface of the connecting sleeve 12. An actuating arm 16 is sleeved on the outer arc surface of the dial indicator rod 15. A dial indicator 17 is fixedly installed on one side of the actuating arm 16.

[0032] The connecting shaft of the universal ball joint 86 is fastened to the base plate 9. After the angle is fixed, the base plate 9 drives the transition arc plate 10 on one side to maintain a synchronous posture. The sliding arc groove 101 on the surface of the transition arc plate 10 is an arc-shaped long hole. One end of the connecting rod 11 is bolted into the sliding arc groove 101 and can slide along the arc trajectory. During the sliding process, the two ends of the connecting plate 14 are hinged to the connecting rod 11 and the connecting sleeve 12 respectively, which drives the connecting sleeve 12 to swing at a small angle, so as to realize the fine adjustment of the angle of the connecting sleeve 12.

[0033] The connecting sleeve 12 is a hollow tubular structure. The internal sleeve rod 15 can be extended and retracted axially to finely adjust its length. By adjusting the extension length of the sleeve rod 15, the operator can rotate the sleeve rod 15 around its axis in conjunction with the rotation of the actuating arm 16. This causes the dial indicator 17 to be rigidly connected to the actuating arm 16 to adjust the probe direction, ultimately making the carbide probe of the dial indicator 17 completely fit with the blade tip slope at the "fixed axial dimension point" of the compressor rotor.

[0034] After the dial indicator 17 probe is stably attached and the device is not loose or shaking, observe the pointer deflection of the dial indicator 17. After the pointer stops, read the value. This value directly reflects the outer diameter of the blade tip at the measurement point. The deviation needs to be calculated by combining the blade angle diameter deviation with the preset reference value to complete the measurement of the outer diameter of the blade tip at this axial point.

Claims

1. A device for measuring the tip size of a compressor rotor, characterized in that: The device includes a reinforced magnetic base (1), with a suspension bracket (2) connected to the middle of the upper surface of the reinforced magnetic base (1). The suspension bracket (2) is L-shaped, with a through hole in the middle of the upper surface. A shock-absorbing bracket (3) is placed on the top surface of the L-shaped structure of the suspension bracket (2). The lower surface of the shock-absorbing bracket (3) corresponds to the through hole on the surface of the suspension bracket (2). A spherical cavity (4) is connected through the through hole on the surface of the suspension bracket (2). The upper surface of the spherical cavity (4) is provided with a locking stop (401), and the bottom of the lower surface of the spherical cavity (4) is provided with an extension end (402). The bottom extension end (402) extends through to the bottom surface of the through hole and is attached to the lower surface of the suspension bracket (2) by a nut. The outer arc surface of the spherical cavity (4) is movably sleeved with a tubular member (5). A spherical ring plate (501) is provided on the lower end surface of the tubular member (5). The spherical ring plate (501) abuts against the surface of the spherical cavity (4). A limiting ring (502) is provided in the middle of the inner arc surface of the tubular member (5). One end of the snap-fit ​​stop (401) is snapped into the inner arc surface of the tubular member (5). An installation groove (503) is opened on one side of the outer arc surface of the tubular member (5). The bottom of the outer arc surface of the spherical cavity (4) is placed on the surface of the shock-absorbing bracket (3).

2. The compressor rotor blade tip size measuring device according to claim 1, characterized in that: A shaft is movably connected through the mounting groove (503) on one side of the tubular component (5). A pin convex plate (6) is fixedly installed at one end of the shaft in the mounting groove (503). A swing arm (7) is movably connected to one side surface of the pin convex plate (6). The swing arm (7) is placed on one side of the suspension bracket (2). A locking assembly (8) is fixedly installed on the end face of the swing arm (7) away from the pin convex plate (6).

3. The compressor rotor blade tip size measuring device according to claim 2, characterized in that: The locking assembly (8) includes a ball seat body (81) fixedly installed on one side of the swing arm (7). A base (82) is threadedly connected to the bottom of the inner arc surface of one side of the ball seat body (81). A main knob (83) is sleeved on one side of the outer arc surface of the ball seat body (81). A fixing nut (832) is connected to the middle of the upper surface of the main knob (83). A protrusion (831) is provided on the inner arc surface of the main knob (83).

4. The compressor rotor blade tip size measuring device according to claim 3, characterized in that: One end of the protrusion (831) extends into the interior of the ball seat body (81). The inner arc surface of the protrusion (831) is fitted with a locking top plate (84). One end of the locking top plate (84) extends into the interior of the ball seat body (81). A locking pressure block (85) is fixedly installed on one end of the locking top plate (84). A universal ball joint (86) is movably engaged at the top of the inner arc surface of the ball seat body (81).

5. The compressor rotor blade tip size measuring device according to claim 4, characterized in that: A damping ring (87) is fitted onto the bottom surface of the outer arc of the universal ball joint (86). The lower surface of the damping ring (87) is provided with a contact part (871). The upper surface of the locking block (85) is provided with a groove. The top of the locking block (85) is provided with a trapezoidal platform (851). One end of the trapezoidal platform (851) is engaged with the surface of the contact part (871) under the damping ring (87).

6. The compressor rotor blade tip size measuring device according to claim 5, characterized in that: A spring (88) is fixedly installed in the groove of the locking block (85). The end of the spring (88) away from the locking block (85) is fixedly installed on the contact part (871). The damping ring (87) is pressed against the outer arc surface of the universal ball joint (86).

7. The compressor rotor blade tip size measuring device according to claim 5, characterized in that: A base support plate (9) is fixedly installed on one end face of the universal ball joint (86). A transition arc plate (10) is provided on one side surface of the base support plate (9). A sliding arc groove (101) is opened on one side surface of the transition arc plate (10). A connecting rod (11) is slidably engaged on the inner arc surface of the sliding arc groove (101).

8. The compressor rotor blade tip size measuring device according to claim 7, characterized in that: The bottom side of the adapter arc plate (10) is movably connected to a connecting sleeve (12) via a rotating shaft. A hanging ear (13) is provided on one edge of the upper surface of the connecting sleeve (12). A rocker plate (14) is movably connected to one side of the hanging ear (13) via a rotating shaft.

9. The compressor rotor blade tip size measuring device according to claim 8, characterized in that: One end of the rocker plate (14) is connected to the connecting rod (11), the inner arc surface of the connecting sleeve (12) is connected to the dial indicator rod (15), the outer arc surface of the dial indicator rod (15) is sleeved with the actuating arm (16), and a dial indicator (17) is fixedly installed on one side of the actuating arm (16).

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