CN113084706A - Automatic measurement method for grinding blade tips of multistage stationary blades of gas compressor - Google Patents
Automatic measurement method for grinding blade tips of multistage stationary blades of gas compressor Download PDFInfo
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- CN113084706A CN113084706A CN202110282957.XA CN202110282957A CN113084706A CN 113084706 A CN113084706 A CN 113084706A CN 202110282957 A CN202110282957 A CN 202110282957A CN 113084706 A CN113084706 A CN 113084706A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The embodiment of the application provides an automatic measurement method for grinding blade tips of multistage stationary blades of a compressor, which belongs to the technical field of measurement of blades of the compressor and specifically comprises a casing fixedly provided with the stationary blades to be measured, an X-Z coordinate system is established, 0 point in each direction is determined, a trigger type measuring head extends into the casing and is positioned between two blades to serve as a measurement initial position, a blade body profile of each stationary blade touches the trigger type measuring head through a rotary workbench, the trigger type measuring head is adjusted to be far away from the blades to be measured to a certain distance, then the trigger type measuring head is adjusted to be over against the blade tips of the blades to be measured and slowly approach the blade tips, and when the contact touches the blade tips, the X coordinate displayed on a machine tool is the; when the multistage stationary blades of the compressor are measured, the measuring steps are repeated, and the L value and the N value are correspondingly modified according to the stationary blades of the corresponding stages. Through the processing scheme of this application, the multistage quiet leaf blade of measurable quantity realizes automatic measurement, improves measurement of efficiency, measurement stability and measurement accuracy.
Description
Technical Field
The application relates to the technical field of gas compressor measurement, in particular to an automatic measurement method for grinding of multistage stationary blade tips of a gas compressor.
Background
The aeroengine and the gas turbine compressor static blade have two structures, one is provided with an inner ring, one end of the blade is fixed on a casing, the other end of the blade is fixed on the inner ring, and the blade does not need to be subjected to blade tip grinding. The other is a cantilevered vane, one end of which is fixed to the casing and the other end of which is not fixed, and the vane of this configuration usually requires integral tip grinding after assembly in order to ensure full tip runout and clearance. The blade tip grinding of the stator blade casing assembly is usually carried out on a vertical grinding machine, the blade tip diameter needs to be measured to determine the cutting feed amount of a grinding wheel before grinding, and the blade tip diameter needs to be measured to judge whether the blade tip diameter is in place or not after grinding, so that the measurement of the blade tip diameter plays an important role in the blade tip grinding process.
The stator blade and the casing are mostly assembled in a tenon-mortise fit mode, in order to prevent blade resonance in the working process, stator blades with different tenon widths can be installed to ensure that certain gaps exist in the circumferential direction of the mortise, so that the circumferential distance of the blade tips is not completely equal, and the automatic measurement of the size of the whole circle of blade tips can not be realized by rotating the same angle.
The patent CN110732918A adopts a lever dial indicator to play a meter, and measures the distance from a point to be measured of the blade tip to a radial reference surface, thereby indirectly obtaining the radius of the blade tip. The method has the following defects in practical operation: the operation is complicated, the method is not suitable for measuring the size of the multi-blade tip, the scheme can only manually move a measuring head of the dial indicator to the blade tip, the machine tool coordinate can reflect the real blade tip size after the measuring head contacts the blade tip and also needs to deflect a pointer of the dial indicator by 0.001mm, and for the integral blade tip grinding of the multi-stage compressor, for example, 17 stages, each stage measures 50 blade data, and the workload is huge depending on the manual measurement; the method is not easy to observe and is not suitable for measuring the blade tips of the multistage stationary blades, the compressor casings with the multistage stationary blades are quite high, some casings even reach 1.5m, when the dial indicator extends into the casings, an outside operator is difficult to clearly see the measuring head of the dial indicator, and the measuring head is difficult to rapidly move to the measured position of the blade tips; the measurement reliability is low, the dial indicator is adsorbed on a machine tool upright post through magnetic force, slight movement cannot be avoided in the moving process and the static blade tip touching process, and the movement can bring large errors to the following measurement results.
Disclosure of Invention
In view of this, the embodiment of the present application provides an automatic measurement method for grinding a blade tip of a compressor multistage stationary blade, so as to solve technical problems of complicated measurement operation, unsuitability for multistage multi-blade measurement, uneasiness for observation, low reliability and the like in the measurement process of the blade tip of the compressor multistage stationary blade, and at least partially solve problems existing in the prior art.
The embodiment of the application provides an automatic measurement method for grinding of a blade tip of a multistage stationary blade of a gas compressor, which comprises the following steps:
s1, fixing the casing provided with the stator blade to be tested on a workbench of the vertical grinding machine tool and aligning the casing;
s2, establishing an X-Z coordinate system by taking the vertical downward direction of the machine tool upright of the vertical grinding machine tool as a Z axis and the horizontal plane direction of the machine tool upright as an X axis;
s3, mounting the trigger type measuring head on a main shaft of the vertical grinding machine tool, enabling the trigger type measuring head to point to the casing along the X-axis direction, and fixing the angular position of the main shaft, wherein the trigger type measuring head comprises a measuring needle, a contact and a measuring head main body;
s4, operating a handle of the vertical grinding machine tool, touching a B surface of the contact with a radial B reference surface, wherein the B reference surface is an end surface spigot circular surface of the casing, and determining a 0 point in the X direction in the X-Z coordinate system according to a diameter measured value phi D of the B reference surface;
s5, operating a handle of the vertical grinding machine tool, moving the trigger type measuring head to an A reference surface of the casing in the Z direction, enabling the A surface of the contact to be in contact with the A reference surface, and setting the position as a Z-direction 0 point in the X-Z coordinate system;
s6, setting the distance from the measuring point of the blade tip of the stator blade to be measured to the point 0 in the Z direction to be L, so that the trigger type measuring head extends into the casing and moves downwards from the point 0 in the Z direction by L;
s7, after the trigger measuring head moves downwards L, adjusting the angle of the workbench, and adjusting the relative position relation between the trigger measuring head and the blade tip to be measured to enable the trigger measuring head to be located between two stationary blade blades and serve as the initial position for measurement of the trigger measuring head;
s8, moving the trigger type measuring head along the X direction to enable a contact of the trigger type measuring head to extend into a space between two blades by 2 +/-0.5 mm;
s9, slowly rotating the workbench in one direction until the blade body profile of the stator blade to be measured touches the trigger type measuring head to stop;
s10, moving the trigger type measuring head out along the X axis and in the direction far away from the blade tip of the static blade to be measured, and stopping when the distance from the blade tip position is 5 +/-0.5 mm;
s11, continuing to rotate the workbench by a certain angle in the same direction, enabling the contact to just face the blade tip of the stator blade to be measured, recording the rotation angle as alpha, and adopting the alpha when measuring the rest stator blade;
s12, slowly moving the trigger type measuring head along the X direction to be close to the blade tip of the static blade to be measured, and when the contact touches the blade tip of the static blade to be measured, displaying an X coordinate on a machine tool, namely the radius of the blade tip to be measured;
s13, keeping the trigger type measuring head away from the blade tip to be measured by 5 +/-0.5 mm along the X direction;
s14, rotating the table by β °, so that the trigger probe is aligned with a gap of a next blade to be measured, where β is 180/N, and N is the number of a circle of blades;
and S15, repeating the steps S7-S14 to finish the measurement of the size of the blade tip of one circle, and automatically measuring the blades of the other circles through the macro program of the vertical grinding machine.
According to a specific implementation manner of the embodiment of the application, when the multistage stationary blade of the compressor is measured, the steps S4-S15 are repeated, the L value is modified into the distance from the measuring point of the blade tip of the next stage stationary blade to be measured to the 0 point in the Z direction, and the N value is modified into the number of the blades of the corresponding stage.
According to a specific implementation manner of the embodiment of the present application, in the step S1, the casing is fixed on the workbench of the vertical grinding machine in a manner that the casing is clamped on a clamp, and the clamp is fixed on the workbench through a pressure plate or magnetic force.
According to a specific implementation manner of the embodiment of the present application, the method further includes: when the trigger mechanism in the measuring head main body is triggered, the state of a closed active circuit connected with the trigger mechanism in the measuring head main body is changed, and an acousto-optic signal is sent out to indicate the working state of the trigger measuring head.
According to a specific implementation manner of the embodiment of the application, the condition that the trigger mechanism is triggered is that the stylus swings or the stylus moves towards the inside of the trigger type measuring head.
According to a specific implementation manner of the embodiment of the present application, in the step S6, the trigger probe needs to be configured not to collide with any stationary blade in the X direction before moving down.
According to a specific implementation manner of the embodiment of the application, the alignment of the casing is performed by adopting a dial indicator, and the circular runout of the casing relative to the rotating shaft of the workbench is adjusted to be qualified.
According to a specific implementation of the embodiment of the present application, the contact is shaped as a sphere or a prism.
According to a specific implementation manner of the embodiment of the application, the contact is in the shape of a regular quadrangular prism, and the length of the edge length ranges from 3 mm to 5 mm.
According to a particular implementation of the embodiments of the present application, the stylus length is less than the minimum vane tip radius.
Advantageous effects
The application provides an automatic measurement method for grinding of the tips of multistage stationary blades of a gas compressor, which can realize automatic measurement, greatly improve the measurement efficiency and reduce the workload.
The method is suitable for multi-stage blade measurement, and the blade tips of different stages can be measured only by inputting the L value and the number N of the blades of the corresponding stage.
The measuring accuracy improves, and trigger formula gauge head direct mount is on the lathe main shaft, and it is more stable to measure, and the measuring result direct reflection is the lathe main shaft coordinate value for it is more convenient to record the measuring result.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic illustration of a stationary blade vertical grinding apparatus according to an embodiment of the present invention;
fig. 2 is a structural diagram of a trigger probe according to an embodiment of the present invention;
fig. 3 is an enlarged view of the trigger probe shown in fig. 2 at P;
FIG. 4 is a schematic illustration of grinding dimensions of a casing according to an embodiment of the invention;
FIGS. 5A-D are schematic diagrams of automatic measurement steps for grinding of a compressor multistage stationary blade tip in accordance with an embodiment of the present invention.
In the figure: 1. a machine tool upright post; 2. a main shaft; 3. a trigger probe; 3-1, measuring a needle; 3-2, a contact; 3-3, a probe main body; 4. a case; 5. a work table; 6. a stationary vane.
Detailed Description
The embodiments of the present application will be described in detail below with reference to the accompanying drawings.
The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The present application is capable of other and different embodiments and its several details are capable of modifications and/or changes in various respects, all without departing from the spirit of the present application. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present application, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present application, and the drawings only show the components related to the present application rather than the number, shape and size of the components in actual implementation, and the type, amount and ratio of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.
In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.
The embodiment of the application provides an automatic measurement method for grinding of a blade tip of a multistage stationary blade of a compressor, which is described in detail below with reference to the accompanying drawings.
Referring to fig. 1, the structural diagram of the stationary blade vertical grinding equipment is shown, the automatic measurement method is completed based on a vertical grinding machine tool, the vertical grinding machine tool mainly comprises a machine tool upright post 1, a main shaft 2, a trigger type measuring head 3 and a workbench 5, the trigger type measuring head 3 is directly connected with the main shaft 2 of the machine tool, the measurement is more stable by the connection method, and the measurement result is directly reflected to the coordinate value of the machine tool main shaft 2, so that the measurement result is more convenient to record, and the measurement precision is improved. The specific measurement steps are as follows:
s1, the casing 4 with the stator blades is mounted on a special fixture (not shown), the fixture is fixed on the table 5 of the vertical grinding machine by a pressing plate/magnetic force, and the casing 4 is aligned. In this embodiment, the casing 4 is aligned by using the dial indicator, and the circular runout of the casing 4 relative to the rotation axis of the table 5 is adjusted to be qualified.
And S2, establishing an X-Z coordinate system by taking the vertical downward direction of the machine tool upright post 1 of the vertical grinding machine tool as a Z axis and the horizontal plane direction of the machine tool upright post 1 as an X axis.
And S3, mounting the trigger type measuring head 3 on the main shaft 2 of the vertical grinding machine tool, enabling the trigger type measuring head 3 to point to the casing 4 along the X-axis direction, and fixing the angular position of the main shaft 2, wherein the trigger type measuring head 3 comprises a measuring needle 3-1, a contact 3-2 and a measuring head main body 3-3, and is shown in figures 2-3.
Specifically, the measuring head main body 3-3 is a cylindrical structure and is connected with the main shaft 2; the measuring needle 3-1 is positioned at one end of the measuring head main body 3-3 far away from the main shaft 2, the axis of the measuring needle 3-1 is vertical to the axis of the measuring head main body 3-3, and in order for the triggering type measuring head 3 to extend into the casing 4 and not to interfere with other blades during measurement, the length of the measuring needle 3-1 is required to be smaller than the minimum blade tip radius in the casing 4.
The contact 3-2 is connected to one end of the measuring pin 3-1, the shape of the contact can be a sphere or a prism, but the tip of the compressor is usually very thin, and if the sphere three-dimensional contact 3-2 is used, the requirement on the measuring position is very high, and the measuring point cannot be touched by a slight deviation. More preferably, the contact 3-2 is of a regular quadrangular prism structure, and the edge length range of the contact is 3-5 mm; the surface of the contact 3-2 is divided into a surface A and a surface B, wherein the surface B is the right opposite surface of the connection surface of the contact 3-2 and the measuring pin 3-1, and the surface A is four side surfaces vertical to the surface B.
A closed active circuit (not shown in the figure) is arranged in the probe main body 3-3 and is connected with a special trigger mechanism (not shown in the figure), and as long as the trigger mechanism generates a trigger action, the circuit state change is caused and an acousto-optic signal is sent out to indicate the working state of the trigger probe 3; the only condition for the trigger mechanism to generate the trigger action is that the measuring needle 3-1 of the trigger measuring head 3 generates tiny swing or moves towards the inside of the trigger measuring head 3, when the trigger measuring head 3 is connected to the machine tool spindle 2 and moves along with the spindle 2, as long as the contact head 3-2 on the measuring needle 3-1 contacts with the surface of a workpiece (any solid material) in any direction, the measuring needle 3-1 generates tiny swing or movement, and the trigger measuring head 3 can immediately generate an acousto-optic signal to indicate the working state of the trigger measuring head 3.
When the trigger measuring head 3 is adopted on the numerical control machine tool for measurement, the trigger measuring head 3 is directly installed on a main shaft 2 of the machine tool, then an operator manually controls the machine tool to move, a contact 3-2 on a measuring needle 3-1 of the trigger measuring head 3 is contacted with the surface of a workpiece, and a numerical control system of the machine tool records and displays the position coordinate value of the main shaft 2 in real time, so that the coordinate value of a measured point of the workpiece can be converted by combining the specific position relation of the contact 3-2 of the measuring needle 3-1 and the workpiece, and the coordinate value of the main shaft 2 of the machine tool. After the relative coordinate values of all measured points of the workpiece are obtained, the relative calculation is carried out according to the geometric position relation of all coordinate points, and the final measurement result can be obtained.
S4, referring to FIG. 4, the handle of the vertical grinding machine is operated to touch the B surface of the contact 3-2 to the radial B reference surface which is the end surface spigot circular surface of the casing 4, and the X-direction 0 point in the X-Z coordinate system is determined according to the diameter measured value φ D of the B reference surface.
S5, referring to fig. 4, the trigger probe 3 is moved to the reference plane a in the Z direction of the housing 4 by operating the handle of the vertical grinding machine, and the reference plane a is brought into contact with the surface a of the contact 3-2, and this position is set to be the Z direction 0 point in the X-Z coordinate system.
S6, the distance from the measuring point of the tip of the stator blade 6 to be measured to the point 0 in the Z direction is L, so that the trigger probe 3 extends into the casing 4 and moves down by L from the point 0 in the Z direction.
It should be noted here that, for the multi-stage vane, when the vane 6 of the other stage is measured, the L value is changed accordingly.
S7, after the trigger probe 3 moves down by L, adjust the angle of the table 5, and adjust the relative position relationship between the trigger probe 3 and the blade tip to be measured, so that the trigger probe 3 is located between the two stationary blades 6, as shown in fig. 5A, and is used as the initial position for measuring by the trigger probe 3.
It should be noted that the relative position relationship between the trigger probe 3 and the blade tip to be measured further includes a case where the contact 3-2 faces the blade tip, referring to fig. 5D, but since the blade tip and the contact 3-2 are both small in size, it takes time to adjust to a position where the contact 3-2 faces the blade tip, and therefore the trigger probe 3 is selected to be located between the two stationary blades 6 as an initial position.
And S8, moving the trigger measuring head 3 along the X direction to enable the contact 3-2 of the trigger measuring head 3 to extend into the space between the two blades by 2 +/-0.5 mm.
S9, the table 5 is rotated slowly in one direction until the blade profile of one stationary blade 6 comes into contact with the trigger probe 3 and stops, as shown in fig. 5B.
S10, the trigger probe 3 is moved out in the direction of the X axis and away from the tip of the stationary blade 6, and is stopped at a distance of 5 ± 0.5mm from the tip position of the stationary blade 6, as shown in fig. 5C.
And S11, continuing to rotate the workbench 5 by a certain angle in the same direction, so that the contact 3-2 just faces the blade tip of the current stationary blade 6, recording the rotation angle as alpha as shown in FIG. 5D, and adopting alpha when measuring the rest stationary blade 6 blades.
And S12, slowly moving the trigger measuring head 3 along the X direction to be close to the tip of the current stationary blade 6, and when the contact 3-2 touches the tip of the current stationary blade 6, the X coordinate displayed on the machine tool is the radius of the current tip.
And S13, moving the trigger type measuring head 3 away from the current blade tip by 5 +/-0.5 mm along the X direction.
S14 and the table 5 rotate by β °, so that the trigger probe 3 is aligned with the next gap between the blades to be measured, where β is 180/N, where N is the number of one turn of blades.
And S15, repeating the steps S7-S14 to finish measurement of the size of the blade tip for one circle, and automatically measuring the blades of the blade by the macro program of the vertical grinding machine.
S16, when the multistage stationary blades of the compressor are measured, after the operation is completed, only the measurement of the stationary blade of the 1 stage is completed, the next stage stationary blade is measured, only the steps S4-S15 need to be repeated, the L value is modified into the distance from the measuring point of the blade tip of the next stage stationary blade to be measured to the 0 point in the Z direction, and the N value is modified into the number of the blades of the corresponding stage.
The embodiment of the invention provides an automatic measurement method for grinding the blade tips of the multistage stationary blades of the compressor, which is mainly applied to aeroengines and gas turbines and can realize automatic measurement and improve the working efficiency, aiming at the technical problems that the measurement operation in the measurement process of the stationary blade tips of the conventional compressor is complicated, is not suitable for multistage multi-blade measurement, is not easy to observe, has low reliability and the like; the method is suitable for multi-stage blade measurement, and the blade tips of different stages can be measured only by inputting the L value and the number N of the blades of the corresponding stage; through will trigger formula gauge head direct mount on the lathe main shaft, it is more convenient to record the measuring result, measures more stably, and measurement accuracy is higher.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. An automatic measurement method for grinding of a multistage stationary blade tip of a compressor is characterized by comprising the following steps:
s1, fixing the casing provided with the stator blade to be tested on a workbench of the vertical grinding machine tool and aligning the casing;
s2, establishing an X-Z coordinate system by taking the vertical downward direction of the machine tool upright of the vertical grinding machine tool as a Z axis and the horizontal plane direction of the machine tool upright as an X axis;
s3, mounting the trigger type measuring head on a main shaft of the vertical grinding machine tool, enabling the trigger type measuring head to point to the casing along the X-axis direction, and fixing the angular position of the main shaft, wherein the trigger type measuring head comprises a measuring needle, a contact and a measuring head main body;
s4, operating a handle of the vertical grinding machine tool, touching a B surface of the contact with a radial B reference surface, wherein the B reference surface is an end surface spigot circular surface of the casing, and determining a 0 point in the X direction in the X-Z coordinate system according to a diameter measured value phi D of the B reference surface;
s5, operating a handle of the vertical grinding machine tool, moving the trigger type measuring head to an A reference surface of the casing in the Z direction, enabling the A surface of the contact to be in contact with the A reference surface, and setting the position as a Z-direction 0 point in the X-Z coordinate system;
s6, setting the distance from the measuring point of the blade tip of the stator blade to be measured to the point 0 in the Z direction to be L, so that the trigger type measuring head extends into the casing and moves downwards from the point 0 in the Z direction by L;
s7, after the trigger measuring head moves downwards L, adjusting the angle of the workbench, and adjusting the relative position relation between the trigger measuring head and the blade tip to be measured to enable the trigger measuring head to be located between two stationary blade blades and serve as the initial position for measurement of the trigger measuring head;
s8, moving the trigger type measuring head along the X direction to enable a contact of the trigger type measuring head to extend into a space between two blades by 2 +/-0.5 mm;
s9, slowly rotating the workbench in one direction until the blade body profile of the stator blade to be measured touches the trigger type measuring head to stop;
s10, moving the trigger type measuring head out along the X axis and in the direction far away from the blade tip of the static blade to be measured, and stopping when the distance from the blade tip position is 5 +/-0.5 mm;
s11, continuing to rotate the workbench by a certain angle in the same direction, enabling the contact to just face the blade tip of the stator blade to be measured, recording the rotation angle as alpha, and adopting the alpha when measuring the rest stator blade;
s12, slowly moving the trigger type measuring head along the X direction to be close to the blade tip of the static blade to be measured, and when the contact touches the blade tip of the static blade to be measured, displaying an X coordinate on a machine tool, namely the radius of the blade tip to be measured;
s13, keeping the trigger type measuring head away from the blade tip to be measured by 5 +/-0.5 mm along the X direction;
s14, rotating the table by β °, so that the trigger probe is aligned with a gap of a next blade to be measured, where β is 180/N, and N is the number of a circle of blades;
and S15, repeating the steps S7-S14 to finish the measurement of the size of the blade tip of one circle, and automatically measuring the blades of the other circles through the macro program of the vertical grinding machine.
2. The automatic measuring method for grinding the blade tips of the multistage stationary blades of the compressor as claimed in claim 1, wherein when the multistage stationary blades of the compressor are measured, the steps S4-S15 are repeated, and the L value is modified to the distance from the measuring point of the blade tip of the next stage stationary blade to be measured to the 0 point in the Z direction, and the N value is modified to the number of the blades of the corresponding stage.
3. The automatic measurement method for grinding the tips of the multiple stages of stationary blades of the compressor as claimed in claim 1, wherein in the step S1, the casing is fixed on the worktable of the vertical grinding machine by clamping the casing on a clamp fixed on the worktable by a pressing plate or magnetic force.
4. The compressor multistage stationary blade tip grinding automatic measurement method according to claim 1, further comprising: when the trigger mechanism in the measuring head main body is triggered, the state of a closed active circuit connected with the trigger mechanism in the measuring head main body is changed, and an acousto-optic signal is sent out to indicate the working state of the trigger measuring head.
5. The automatic compressor multistage stationary blade tip grinding measurement method according to claim 4, wherein the trigger mechanism is triggered when the stylus swings or moves toward the inside of the trigger probe.
6. The automatic compressor multistage stationary blade tip grinding measurement method according to claim 1, wherein in step S6, the trigger probe is required to be advanced in the X direction so as not to collide with any stationary blade.
7. The automatic measurement method for grinding the tips of the multistage stationary blades of the compressor as claimed in claim 1, wherein the alignment casing is aligned by a dial indicator, and the circular runout of the casing relative to the rotating shaft of the workbench is adjusted to be qualified.
8. The compressor multistage stationary blade tip grinding automatic measurement method as claimed in claim 1, wherein the contact is in the shape of a sphere or a prism.
9. The automatic compressor multistage stationary blade tip grinding measurement method as claimed in claim 8, wherein the contact is in the shape of a regular quadrangular prism, and the length of the prism is in the range of 3-5 mm.
10. The compressor multistage vane tip grinding automatic measurement method as claimed in claim 1, wherein the probe length is smaller than a minimum vane tip radius.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114234768A (en) * | 2021-12-13 | 2022-03-25 | 中船重工龙江广瀚燃气轮机有限公司 | Method for measuring size of blade tip of compressor rotor |
| CN115046486A (en) * | 2022-06-07 | 2022-09-13 | 中国航发航空科技股份有限公司 | Device and method for measuring diameter of blade grinding tip of high-pressure compressor casing |
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Cited By (2)
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| CN114234768A (en) * | 2021-12-13 | 2022-03-25 | 中船重工龙江广瀚燃气轮机有限公司 | Method for measuring size of blade tip of compressor rotor |
| CN115046486A (en) * | 2022-06-07 | 2022-09-13 | 中国航发航空科技股份有限公司 | Device and method for measuring diameter of blade grinding tip of high-pressure compressor casing |
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