CN110207644B - Rotor disc stack assembly method and apparatus - Google Patents
Rotor disc stack assembly method and apparatus Download PDFInfo
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- CN110207644B CN110207644B CN201810166237.5A CN201810166237A CN110207644B CN 110207644 B CN110207644 B CN 110207644B CN 201810166237 A CN201810166237 A CN 201810166237A CN 110207644 B CN110207644 B CN 110207644B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/22—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes
- G01B21/24—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes for testing alignment of axes
Abstract
The invention relates to a method and a device for assembling a rotor disc stack. Wherein the rotor disc stack assembly method comprises the steps of: sequentially acquiring the coaxiality and the deviation degree of the mounting edge of each stage of the rotor disc in the n stages of the rotor discs relative to a reference; calculating a deviation matrix of the n-level rotor disc; extracting a coaxiality deviation function FE of the nth-stage rotor disc relative to the 1 st-stage rotor disc by taking the installation angle beta (i) as a variable from a deviation matrix of the nth-stage rotor disc; acquiring an unbalance deviation function FU of the n-level rotor disc by taking the installation angle beta (i) as a variable; acquiring a total deviation function F (FE + k) FU according to the coaxiality deviation function FE and the unbalance deviation function FU, wherein the independent variable of the total deviation function is the installation angle beta (i) of each stage of the rotor disc; the minimum value is calculated by using the total deviation function as an objective function, and the calculated value is the installation angle β (i) of the corresponding rotor disk. The invention can improve the assembly precision and the assembly efficiency of the rotor disc stacking assembly.
Description
Technical Field
The invention relates to a method and a device for assembling a rotor disc stack.
Background
One of the keys to the assembly of the stack of rotor disks of an engine is the control of concentricity. In a traditional coaxiality control method, end jump and radial jump of a single-stage rotor disc installation seam allowance are measured, a high point angle of the single-stage rotor disc is recorded, and high points of two adjacent rotor discs are enabled to be staggered by 180 degrees during assembly. The coaxiality control method is simple and efficient for the stacking assembly of two stages of rotor disks.
For stacked assembly of rotor disks above three levels, staggering 180 ° is not an optimal mounting angle. During actual assembly, a trial assembly method is adopted, namely, different installation angles are repeatedly tried, and then whether the jitter of the monitoring surface is out of tolerance is measured. Typically, more than two trials are required to arrive at a satisfactory installation angle. The trial assembly method is effective, but has low efficiency, and the main reasons are that (1) the rotor disks at all stages are in interference fit, and part mounting edges need to be heated or cooled. (2) During repeated assembly and disassembly, tools such as a puller, a presser and the like are required. (3) The connecting bolts among the partial disks have limited screwing space, and can be screwed only by using a special tool. Furthermore, the final installation angle obtained by the trial installation method can meet the technical requirements but may not be the optimal installation angle.
Therefore, in order to improve the efficiency and accuracy of the assembly of aeroengine rotor disks in a stack, a more efficient method is needed to optimize the process of assembling the rotor disks in a stack.
Disclosure of Invention
The invention provides a rotor disc stacking and assembling method and device capable of improving assembling precision.
The invention provides a rotor disc stacking and assembling method, which comprises the following steps:
sequentially acquiring the coaxiality and the deviation degree of the mounting edge of each stage of the rotor disc in the n stages of the rotor discs relative to a reference; calculating a deviation matrix of the n-level rotor disc; extracting a coaxiality deviation function FE of the nth-stage rotor disc relative to the 1 st-stage rotor disc by taking the installation angle beta (i) as a variable from a deviation matrix of the nth-stage rotor disc;
acquiring an unbalance deviation function FU of the n-level rotor disc by taking the installation angle beta (i) as a variable;
acquiring a total deviation function F (FE + k) FU according to the coaxiality deviation function FE and the unbalance deviation function FU, wherein the independent variable of the total deviation function is the installation angle beta (i) of each stage of the rotor disc;
calculating the minimum value by taking the deviation total function as an objective function, wherein the calculated value is the corresponding mounting angle beta (i) of the rotor disc;
wherein n is an integer greater than or equal to 1; k is a coefficient; β (i) is an installation angle of the ith stage rotor disk relative to the 1 st stage rotor disk; i represents the number of stages of the rotor disc and takes a value of 1-n.
Optionally, the method for sequentially acquiring the coaxiality and the deviation degree of the mounting edge of each stage of the rotor disc in the n stages of the rotor discs relative to the reference comprises the following steps:
performing reference alignment on the ith-stage rotor disc;
measuring end jump and radial jump of the mounting edge of the ith-level rotor disc, and fitting the size and angle of coaxiality and the size and angle of perpendicularity of the mounting edge of the ith-level rotor disc relative to a reference by a least square method;
wherein, the value of i is 1-n, and n is an integer greater than or equal to 1.
Optionally, the calculated deviation matrix of the n-level rotor disk is:
wherein, dRiA rotation deviation matrix of the mounting edge of the ith-stage rotor disc relative to a reference; dPiA translation matrix of the mounting edge of the i-th stage rotor disc relative to a datum; siA transformation matrix generated when the ith stage rotor disk rotates relative to the ith-1 stage rotor disk; sjA transformation matrix generated when the j-th stage rotor disk rotates relative to the j-1 st stage rotor disk; i and j represent the stage number of the rotor disc, the value is 1-n, and n is an integer greater than or equal to 1; 0TIs the transposition of the zero matrix;
and i is the coordinate of the circle center of the mounting edge of the ith-stage rotor disc, and the value of i is 1-n.
Optionally, a method for extracting a coaxiality deviation function FE of the nth-stage rotor disk relative to the 1 st-stage rotor disk by taking the installation angle β (i) as a variable from the deviation matrix is as follows:
in the deviation matrix, the deviation matrix is obtained,
is a translation matrix of the nth stage rotor disk relative to the 1 st stage rotor disk, which can also be expressed as [ dX, dY, dZ]And dX, dY and dZ respectively represent the translation quantity functions of the nth stage rotor disk relative to the 1 st stage rotor disk in the horizontal coordinate direction, the vertical coordinate direction and the vertical coordinate direction;
the coaxiality deviation function FE of the nth-stage rotor disc relative to the 1 st-stage rotor disc by taking the installation angle beta (i) as a variable is as follows:
the dX is an abscissa displacement function of the nth-stage rotor disc relative to the 1 st-stage rotor disc, the variable is an installation angle beta (i) of the ith-stage rotor disc relative to the 1 st-stage rotor disc, the value of i is 1-n, and n is an integer greater than or equal to 1;
dY is a vertical coordinate displacement function of the nth stage rotor disc relative to the 1 st stage rotor disc, the variable is a mounting angle beta (i) of the ith stage rotor disc relative to the 1 st stage rotor disc, the value of i is 1-n, and n is an integer greater than or equal to 1.
Optionally, the method for performing the reference alignment on the i-th stage rotor disk is as follows:
mounting the ith-grade rotor disc on a rotor disc stacking and assembling device, and acquiring the end jump and the radial jump of the datum of the ith-grade rotor disc; obtaining the coaxiality and the angle of the datum of the i-th-stage rotor disc and the verticality and the angle of the datum of the i-th-stage rotor disc by adopting least square fitting; if the coaxiality and the verticality of the reference of the ith-level rotor disk exceed the preset range, aligning and adjusting the rotor disk of the ith-level rotor disk, and fitting the coaxiality and the verticality of the reference of the ith-level rotor disk by adopting a least square method until the coaxiality and the verticality are within the preset range;
wherein the value of i is 1-n; n is an integer of 1 or more.
Optionally, the unbalance amount deviation function FU of the n-stage rotor disk with the installation angle β (i) as a variable is:
wherein q (i) is the unbalance amount of the ith-stage rotor disc and is obtained by measurement of a balancing machine; α (i) the angle of the ith stage rotor disk relative to zero, obtained by balancing machine measurements; β (i) is an installation angle of the ith stage rotor disk relative to the 1 st stage rotor disk; omega is the rotation speed of the balancing machine.
The invention provides a rotor disc stack assembly for implementing a rotor disc stack assembly method according to some embodiments, the rotor disc stack assembly comprising an assembly platform for carrying a rotor disc, the assembly platform comprising:
the top of the tilt adjusting plate is used for mounting a rotor disc;
the adjusting plate is arranged below the inclination adjusting plate;
the aligning mechanism is connected with the aligning plate and is used for driving the aligning plate and the inclination adjusting plate to move along a horizontal plane; and the combination of (a) and (b),
and the inclination adjusting mechanism is connected with the inclination adjusting plate and is used for driving the inclination adjusting plate to perform pitching motion relative to the aligning plate.
Optionally, the mounting platform comprises a connector, the connector comprising:
an inner ring connected to the tilt adjustment plate; and the combination of (a) and (b),
an outer ring connected to the aligning plate and the inner ring;
wherein the inner ring is tiltable relative to the outer ring.
Optionally, the connector is a joint bearing.
Optionally, the centering mechanism comprises:
a first link assembly connected to the aligning plate for pushing the aligning plate to move along a horizontal plane; and the combination of (a) and (b),
and the first motor is in driving connection with the first link assembly.
Optionally, the first link assembly comprises:
the first rod is connected with the first motor through a first spherical pair; and the combination of (a) and (b),
the first ends of the two second rods are connected with the first rod through a second spherical pair; the second ends of the two second rods are connected with the aligning plate through a third spherical pair.
Optionally, the tilt mechanism comprises:
the second connecting rod assembly is connected to the tilt adjusting plate and used for pushing the tilt adjusting plate to perform pitching motion; and the combination of (a) and (b),
and the second motor is in driving connection with the second connecting rod assembly.
Optionally, the second link assembly comprises:
the third rod is connected with the second motor through a fourth spherical pair; and the combination of (a) and (b),
the first ends of the fourth rods are connected with the third rods through fifth spherical pairs; and the second end of the fourth rod is connected with the inclination adjusting plate through a sixth spherical pair.
Optionally, the assembly platform comprises two centering mechanisms and two tilt adjusting mechanisms.
Optionally, the rotor disc stack assembly device comprises an air floatation mechanism for carrying said assembly platform.
Optionally, the air floating mechanism includes:
the base is provided with an air cavity, the base is provided with an air inlet and an air outlet, the air inlet is used for introducing air into the air cavity, and the air outlet is used for discharging the air in the air cavity; and the combination of (a) and (b),
the rotary table is arranged above the base, is used for bearing the assembling platform and can rotate relative to the base;
wherein, the gas that the gas vent of base was discharged is used for floating the revolving stage.
Alternatively,
the air cavity is an annular air cavity arranged in the base;
the exhaust hole is equipped with a plurality ofly along annular air cavity, the exhaust hole includes:
a first hole communicating with the air cavity; and the combination of (a) and (b),
a second hole communicating with the first hole and blowing gas toward the turntable;
wherein the flow area of the second aperture is smaller than the flow area of the first aperture for pressurizing the gas flow.
Alternatively,
the top of the base is provided with a conical groove;
the bottom of the rotary table is provided with a conical bottom matched with the conical groove;
and under the floating state of the rotary table, a floating gap for accommodating the air flow blown out from the air exhaust hole is formed between the conical groove and the matching surface of the conical bottom.
Optionally, the conical groove is provided with a buffer hole, and the buffer hole is communicated with the air cavity and is used for blowing the air flow to the conical bottom.
Optionally, a mutually matched sealing structure is arranged between the base and the turntable, and is used for sealing a floating gap formed between the matching surfaces of the conical groove and the conical bottom.
Optionally, the rotor disc stacking and assembling device comprises a data acquisition mechanism for acquiring the radial jump and the end jump of the rotor disc on the assembling platform.
Optionally, the data acquisition mechanism comprises:
a sensor for measuring a radial run out and an end run out of the rotor disc;
and the adjusting frame is used for driving the sensor to move relative to the rotor disc so as to carry out position adjustment.
Optionally, the adjusting bracket comprises:
the upright post is arranged on one side of the assembling platform;
the sliding block is arranged on the upright post and can slide up and down along the upright post;
the sliding rod is arranged on the sliding block and can horizontally slide relative to the sliding block; and the combination of (a) and (b),
and the universal adjusting rod is connected to the sliding rod, and the sensor is arranged on the universal adjusting rod.
Optionally, the data acquisition mechanism includes two adjusting brackets, and the two adjusting brackets are arranged on two sides of the assembling platform relatively.
Optionally, the sensor comprises:
a first sensor for measuring a reference end jump of the rotor disc;
a second sensor for measuring a radial run-out of a datum of the rotor disc;
a third sensor for measuring an end jump of the mounting edge of the rotor disc; and the combination of (a) and (b),
a fourth sensor for measuring the radial run out of the mounting edge of the rotor disk.
Based on the technical scheme, the invention at least has the following beneficial effects:
in some embodiments, both the geometric deviation (function of coaxiality) and the unbalance (function of unbalance) are taken into account, i.e. the unbalance is added while the coaxiality of the mounting edge with respect to the reference axial direction is taken into account, so that the final unbalance is ensured within the tolerance range, the geometric deviation is avoided, and the accuracy of the rotor disc stack assembly can be improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic view of a rotor disk stack assembly apparatus according to some embodiments of the invention.
Fig. 2 is a schematic view of an assembly platform of a rotor disk stack assembly apparatus according to some embodiments of the invention.
Fig. 3 is a schematic view of a centering mechanism in an assembly platform of a rotor disk stack assembly according to some embodiments of the invention.
Fig. 4 is a schematic view of a tilt adjustment mechanism in an assembly platform of a rotor disk stack assembly apparatus according to some embodiments of the invention.
Fig. 5 is a schematic view of a top plate in an assembly platform of a rotor disk stack assembly according to some embodiments of the invention.
Fig. 6 is a schematic view of an air-floating mechanism of a rotor disk stack assembly apparatus according to some embodiments of the invention.
Fig. 7 is a schematic view of a data acquisition mechanism of a rotor disk stack assembly apparatus according to some embodiments of the invention.
Fig. 8 is a schematic fitting diagram of data collected by a rotor disk stack assembly apparatus according to some embodiments of the invention.
Fig. 9 is a schematic view of an off-center fit of data collected by a rotor disk stack assembly apparatus according to some embodiments of the invention.
Fig. 10 is a schematic view of a tilt fit of data collected by a rotor disk stack assembly apparatus according to some embodiments of the invention.
The reference numbers in the drawings:
1-assembling a platform;
11-a tilt adjusting plate;
12-aligning plate;
13-a connector;
14-a centering mechanism; 141-a first electric machine; 142-a first rod; 143-a second rod;
15-a tilt adjusting mechanism; 151-a second motor; 152-a third rod; 153-fourth bar;
16-a base plate;
2, an air floatation mechanism;
21-a base; 211-an air cavity; 212-an air intake; 213-a first well; 214-a second aperture; 215-buffer holes; 216-annular seal groove;
22-a turntable; 221-conical bottom; 222-an annular boss; 223-connecting grooves;
23-a floating gap;
3-a data acquisition mechanism;
31-a sensor;
32-an adjusting bracket; 321-upright post; 322-a slider; 323-sliding bar; 324-universal adjusting rod;
4-a base;
a-a jitter curve; b-a jitter fit curve; c-radial run out curve; d-radial run-out fitting curve; e-end face run-out curve; f-face run-out fitting curve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention.
In the description of the present invention, the coaxiality also refers to the degree of eccentricity between the two stages of rotor disks, and the perpendicularity also refers to the degree of inclination between the two stages of rotor disks.
The reference of the rotor disk refers to the front mounting edge of the rotor disk (close to the rotor disk of the previous stage), and the mounting edge in each embodiment described below refers to the rear mounting edge of the rotor disk (close to the rotor disk of the next stage). The front mounting edge and the rear mounting edge of the rotor disc both comprise end faces and radial faces.
In general, the stack optimization method of the rotor disks uses geometric deviation, namely, coaxiality of front and rear ends (front end: one end of the first stage rotor disk, rear end: one end of the last stage rotor disk) of each stage of rotor disks after assembly as a main measurement index, unbalance of each stage of rotor disks is not considered in an assembly link, and the coaxiality of the final rotor disks is qualified but the unbalance is over-bad.
At least one embodiment of the invention provides a method of assembling a stack of rotor disks, comprising the steps of:
and sequentially acquiring the coaxiality and the deviation degree of the mounting edge of each stage of the rotor disc in the n stages of the rotor discs relative to the reference.
And calculating the deviation matrix of the n-stage rotor disks according to the coaxiality and the deviation degree of the mounting edge of each stage of the n-stage rotor disks relative to the reference.
And extracting a coaxiality deviation function FE of the nth-stage rotor disc relative to the 1 st-stage rotor disc by taking the installation angle beta (i) as a variable from the deviation matrix of the nth-stage rotor disc.
The method specifically comprises the following steps: and calculating a translation matrix and a rotation matrix generated by each stage of the rotor disc through the coaxiality and the verticality of the mounting edge of each stage of the rotor disc relative to the reference, and superposing the translation matrix and the rotation matrix of each stage of the rotor disc to obtain a coaxiality deviation function FE of the nth stage of the rotor disc relative to the 1 st stage of the rotor disc by taking the mounting angle beta (i) as a variable.
For example: n is 5 (but not limited thereto), there are 5-stage rotor disks, and here, a coaxiality deviation function FE of the 5 th stage rotor disk with respect to the 1 st stage rotor disk by the mounting angle β (i) is extracted from the deviation matrix of the 5 th stage rotor disk.
Acquiring an unbalance deviation function FU of the n-stage rotor disc with the installation angle beta (i) as a variable. For example: n is 5, there are 5-stage rotor disks, where the unbalance amount deviation function FU of the 5-stage rotor disk with the installation angle β (i) as a variable is obtained.
And acquiring a total deviation function F (FE + k) FU according to the coaxiality deviation function FE and the unbalance deviation function FU, wherein the independent variable of the total deviation function is the optimal installation angle beta (i) of each stage of the rotor disc.
And calculating the minimum value by taking the deviation total function as an objective function, wherein the calculated value is the mounting angle beta (i) corresponding to each stage of the rotor disc. For example: n is 5, there are 5 stages of rotor disks, where the installation angles β (i) of the rotor disks of each stage are β (1), β (2), β (3), β (4), β (5).
Wherein n is an integer greater than or equal to 1; k is a coefficient; β (i) is an installation angle of the ith stage rotor disk relative to the 1 st stage rotor disk; i represents the number of stages of the rotor disc and takes a value of 1-n.
In some embodiments, the method for sequentially acquiring the coaxiality and the deviation degree of the mounting edge of each stage of the n stages of rotor disks relative to the reference is as follows:
performing reference alignment on the ith-stage rotor disc;
and measuring the end jump and the radial jump of the mounting edge of the ith-level rotor disc, and fitting the size and the angle of the coaxiality and the size and the angle of the perpendicularity of the mounting edge of the ith-level rotor disc relative to the reference by a least square method.
Wherein the value of i is 1-n.
For example: n is 5, and there are 5-stage rotor disks.
Firstly, i is equal to 1, and the reference alignment is carried out on the 1 st-stage rotor disc; and acquiring the coaxiality and the angle of the mounting edge of the 1 st-stage rotor disc relative to the reference and the perpendicularity and the angle.
Then, performing reference alignment on the 2 nd-stage rotor disc, wherein i is 2; and acquiring the coaxiality and the angle of the mounting edge of the 2 nd-stage rotor disc relative to the reference and the perpendicularity and the angle.
i is 3, and performing reference alignment on the 3 rd stage rotor disc; and acquiring the coaxiality and the angle of the mounting edge of the 3 rd-class rotor disc relative to the reference and the perpendicularity and the angle.
Performing reference alignment on a 4 th-stage rotor disc, wherein i is 4; and acquiring the coaxiality and the angle of the mounting edge of the 4 th-stage rotor disc relative to the reference and the perpendicularity and the angle.
Finally, carrying out reference alignment on the 5 th-stage rotor disc, wherein i is 5; and acquiring the coaxiality and the angle of the mounting edge of the 5 th-stage rotor disc relative to the reference and the perpendicularity and the angle.
In some embodiments, the deviation matrix of the n-stage rotor disks calculated according to the coaxiality and the deviation degree of the mounting edge of each stage of the n-stage rotor disks relative to the reference is as follows:
wherein, dRiA rotation deviation matrix of the mounting edge of the ith-stage rotor disc relative to the reference; dPiA translation matrix of the mounting edge of the ith-stage rotor disc relative to a datum; siAn intermediate transformation matrix generated when the ith stage rotor disk rotates relative to the ith-1 stage rotor disk; sjIs jthAn intermediate transformation matrix generated when the stage rotor disk rotates relative to the j-1 th stage rotor disk; i and j represent the stage number of the rotor disc, the value is 1-n, and n is an integer greater than or equal to 1; 0TIs the transposition of the zero matrix;
and i is the coordinate of the circle center of the mounting edge of the ith-stage rotor disc, and the value of i is 1-n.
In some embodiments, the method for extracting the coaxiality deviation function FE of the nth stage rotor disk relative to the 1 st stage rotor disk with the installation angle β (i) as a variable from the deviation matrix is as follows:
in the deviation matrix, the deviation matrix is obtained,
is a translation matrix of the nth stage rotor disk relative to the 1 st stage rotor disk, which can also be expressed as [ dX, dY, dZ]And dX, dY and dZ respectively represent the translation function of the nth stage rotor disk relative to the 1 st stage rotor disk in the directions of an abscissa X, an ordinate Y and an ordinate Z.
The coaxiality deviation function FE of the nth-stage rotor disc relative to the 1 st-stage rotor disc by taking the installation angle beta (i) as a variable is as follows:
the dX is an abscissa displacement function of the nth-stage rotor disc relative to the 1 st-stage rotor disc, the variable is an installation angle beta (i) of the ith-stage rotor disc relative to the 1 st-stage rotor disc, and the value of i is 1-n; n is an integer of 1 or more.
dY is a vertical coordinate displacement function of the nth-stage rotor disc relative to the 1 st-stage rotor disc, the variable is an installation angle beta (i) of the ith-stage rotor disc relative to the 1 st-stage rotor disc, and the value of i is 1-n; n is an integer of 1 or more.
In some embodiments, the reference alignment is performed on the rotor disks of each stage in sequence by:
mounting the ith-grade rotor disc on a rotor disc stacking and assembling device, and acquiring the end jump and the radial jump of the datum of the ith-grade rotor disc; obtaining the coaxiality and the angle of the reference of the i-th-level rotor disc and the verticality and the angle (the coaxiality and the angle of the reference of the i-th-level rotor disc relative to the assembling platform and the verticality and the angle) by adopting least square fitting; if the coaxiality and the verticality of the datum of the ith-grade rotor disk exceed the preset range, aligning and adjusting the ith-grade rotor disk, and fitting the coaxiality and the verticality of the datum of the ith-grade rotor disk by adopting a least square method until the coaxiality and the verticality are within the preset range.
Wherein the value of i is 1-n; n is an integer of 1 or more.
In some embodiments, the unbalance amount deviation function FU of the n-stage rotor disk with the installation angle β (i) as a variable is:
wherein q (i) is the unbalance amount of the ith-stage rotor disc and is obtained by measurement of a balancing machine; α (i) the angle of the ith stage rotor disk relative to zero ("zero" refers to the custom position on the stage rotor disks, representing 0 degrees), obtained by balancing machine measurements; β (i) is an installation angle of the ith stage rotor disk relative to the 1 st stage rotor disk; omega is the rotation speed of the balancing machine.
FxAs a function of the imbalance in the X direction of the abscissa, FyAs a function of the imbalance in the Y direction of the ordinate.
As shown in fig. 1, at least another embodiment of the present invention provides a rotor disk stacking and assembling apparatus capable of measuring a mounting run-out value of each stage of a rotor disk before assembling, calculating an optimal mounting angle, and completing assembling at one time according to the mounting angle during assembling.
As shown in fig. 1 and fig. 2, in some embodiments, a rotor disk stack assembling apparatus of a rotor disk stack assembling method includes an assembling platform 1 for carrying a rotor disk, and the assembling platform 1 includes an inclination adjusting plate 11, an aligning plate 12, an aligning mechanism 14, and an inclination adjusting mechanism 15.
Wherein the top of the tilt plate 11 is used for mounting the rotor disc. The adjusting plate 12 is arranged below the inclination adjusting plate 11. Alternatively, as shown in fig. 5, the assembly platform 1 includes a connecting member 13, and the tilt adjusting plate 11 and the aligning plate 12 are connected by the connecting member 13.
The aligning mechanism 14 is connected with the aligning plate 12 and is used for driving the aligning plate 12 and the tilt adjusting plate 11 to move along a horizontal plane so as to adjust the concentricity of the rotor disc.
The inclination adjusting mechanism 15 is connected with the inclination adjusting plate 11 and used for driving the inclination adjusting plate 11 to rotate in a pitching mode relative to the centering plate 12 and adjusting the perpendicularity of the rotor disc.
The tilt adjusting plate 11 and the aligning plate 12 are combined to form a top plate of the assembling platform 1.
In some embodiments, the connector 13 comprises an inner ring and an outer ring.
Wherein the inner ring is connected to the tilt plate 11. The outer ring is connected to the aligning plate 12 and the inner ring. The inner ring is capable of pitching rotation relative to the outer ring.
Optionally, the connecting element 13 is a joint bearing. The tilt adjusting plate 11, the aligning plate 12 and the knuckle bearing are combined to form a top plate of the assembly platform 1. The tilt adjusting plate 11 is connected with an adjustable inner ring of the joint bearing. The adjusting plate 12 is fixedly connected with the outer ring of the joint bearing. The top plate of the assembly platform 1 adjusts the relative inclination rotation of the inclination adjusting plate 11 relative to the centering plate 12 through the joint bearing, so that the inclination angle of the inclination adjusting plate 11 can be adjusted while the center is adjusted.
In some embodiments, as shown in fig. 3, the centering mechanism 14 includes a first link assembly and a first motor 141.
The first link assembly is connected to the aligning plate 12 for pushing the aligning plate 12 to move along a horizontal plane. The first motor 141 is drivingly connected to the first link assembly for driving the first link assembly as a power input for driving.
In some embodiments, the first link assembly includes a first rod 142 and two second rods 143.
The first rod 142 is connected to the first motor 141 through a first spherical pair. The first ends of the two second rods 143 are connected to the first rod 142 through a second spherical pair; the second ends of the two second rods 143 are connected to the center-adjusting plate 12 through a third spherical pair.
The first spherical pair, the second spherical pair and the third spherical pair are adopted, and the three spherical pairs can ensure the stability of the adjusting process.
Optionally, the two second bars 143 are arranged in parallel.
In some embodiments, as shown in fig. 4, the tilt mechanism 15 includes a second linkage assembly and a second motor 151.
The second connecting rod assembly is connected to the tilt adjusting plate 11 and used for pushing the tilt adjusting plate 11 to rotate in a pitching mode. The second motor 151 is drivingly connected to the second linkage assembly as a power input for the drive.
In some embodiments, the second linkage assembly includes a third rod 152 and a fourth rod 153.
The third rod 152 is connected to the second motor 151 through a fourth spherical pair. The first end of the fourth rod 153 is connected with the third rod 152 through the fifth spherical pair; the second ends of the fourth rods 153 are connected to the tilt adjusting plate 11 through the sixth spherical pair.
In some embodiments, the assembly platform 1 includes two centering mechanisms 14 and two tilt adjusting mechanisms 15, but is not limited to providing two centering mechanisms 14 and two tilt adjusting mechanisms 15.
Alternatively, one of the two aligning mechanisms 14 is used for adjusting the eccentricity of the aligning plate 11 and the tilt adjusting plate 12 in the X direction of the abscissa. The other of the two aligning mechanisms 14 is used for adjusting the eccentricity of the aligning plate 11 and the tilt adjusting plate 12 in the Y-direction of the ordinate.
One of the two tilt adjusting mechanisms 15 is used for adjusting the rotation of the tilt adjusting plate 12 around the abscissa X direction. The other tilt adjusting mechanism 15 of the two tilt adjusting mechanisms 15 is used for adjusting the rotation of the tilt adjusting plate 12 around the ordinate Y direction.
In some embodiments, the assembly platform 1 includes a bottom plate 16, and the first motor 141 in the aligning mechanism 14 and the second motor 151 in the tilt adjusting mechanism 15 are disposed on the bottom plate 16. The actuator end of the aligning mechanism 14 and the actuator end of the tilt adjusting mechanism 15 are connected with a top plate formed by the aligning plate 12 and the tilt adjusting plate 11.
Further, the two first motors 141 are perpendicular to the center of the base plate 16, and the two second motors 151 are perpendicular to the center of the base plate 16.
In some embodiments, as shown in fig. 1, 6, the rotor disk stack assembly device comprises an air floatation mechanism 2 for carrying an assembly platform 1. The air floating mechanism 2 is used for providing blowing force to float the assembling platform 1. Optionally, the assembly platform 1 and the air floating mechanism 2 are detachably connected.
In some embodiments, as shown in fig. 6, the air floating mechanism 2 includes a base 21 and a turntable 22.
An air cavity 211 is arranged in the base 21, the base 21 is provided with an air inlet hole 212 and an air outlet hole, the air inlet hole 212 is used for introducing air into the air cavity 211, and the air outlet hole is used for discharging the air in the air cavity 211.
The turntable 22 is disposed above the base 21 and is used for carrying the assembly platform 1. The gas exhausted from the exhaust hole of the base 21 is used for floating the turntable 22, and the turntable 22 can rotate relative to the base 21 under the driving of a power mechanism (not shown in the figure) for improving the measurement accuracy.
Alternatively, the bottom plate 16 of the assembly platform 1 may be fixedly connected with the turntable 22 of the air floating mechanism 2 in a detachable manner. Further, the top of the turntable 22 may be provided with a coupling groove 223 for coupling with the bottom plate 16 of the mounting platform 1.
In some embodiments, the air cavity 211 is an annular air cavity 211 disposed within the base 21. The air supply enters the annular air chamber 211 through an air inlet hole 212.
The plurality of exhaust holes are formed along the circumferential direction of the annular air chamber 211, and the exhaust holes include a first hole 213 and a second hole 214.
The first hole 213 communicates with the air chamber 211. The second hole 214 communicates with the first hole 213 and blows gas toward the turntable 22, and the turntable is floated by the gas when the gas blowing force is larger than the gravity of the turntable 22.
Wherein the flow area of the second aperture 214 is smaller than the flow area of the first aperture 213, the second aperture 214 acting as a damping pressurization aperture for pressurizing the gas flow. After passing into the annular gas chamber 211, the gas continues to be blown out through the first and second holes 213 and 214.
In some embodiments, the top of the base 21 is provided with a tapered groove; the bottom of the turntable 22 is provided with a conical bottom 221 adapted to the conical groove. The conical air pressure surface formed by the conical bottom 221 of the turntable 22 is matched with the air floating surface formed by the conical groove of the base 21, so that the concentricity of the turntable 22 and the base 21 is facilitated.
In the state where the turntable 22 is floated, a floating gap 23 for receiving the air flow blown out from the air discharge hole is formed between the tapered groove and the mating surface of the tapered bottom 221.
In some embodiments, the conical tank is provided with a buffer hole 215, and the buffer hole 215 communicates with the air chamber 211 for blowing an air flow toward the conical bottom 221 for buffering the floating and falling of the turntable 22.
In some embodiments, a mutually cooperating sealing structure is provided between the base 21 and the turntable 22 for sealing the floating gap 23 formed between the mating surfaces of the tapered groove and the tapered bottom 221.
Optionally, the outer wall of the conical groove is provided with an annular sealing groove 216; the bottom of the turntable 22 is provided with an annular boss 222 around the conical bottom 221; the annular boss 222 cooperates with the annular seal groove 216 for sealing the floating gap 23 formed between the mating surfaces of the tapered groove and the tapered bottom 221.
As shown in fig. 1, 7, in some embodiments, the rotor disk stack assembly device includes a data acquisition mechanism 3 for acquiring the radial jumps and the end jumps of each stage of the rotor disk on the assembly platform 1.
By using the radial jump and end jump data of the rotor discs of each stage acquired by the data acquisition mechanism 3, the coaxiality and the verticality (eccentricity and inclination) of the rotor discs are calculated by using the rotor disc stacking and assembling method provided by the embodiment of the invention, and the output of the final installation angle is finished.
In some embodiments, as shown in fig. 7, the data acquisition mechanism 3 includes a sensor 31 and an adjustment bracket 32.
The sensor 31 is used to measure the radial and end runout of the rotor disk. The adjusting bracket 32 is used to move the sensor 31 relative to the rotor disk for position adjustment.
In some embodiments, the adjustment bracket 32 includes a post 321, a slider 322, a slide bar 323, and a universal adjustment lever 324.
The upright 321 is disposed on one side of the mounting platform 1. The slider 322 is provided on the column 321 and can slide in the vertical direction along the column 321. The slide bar 323 is provided on the slider 322 and is slidable in the horizontal direction with respect to the slider 322. The universal adjustment lever 324 is connected to the slide bar 323, and the sensor 31 is provided on the universal adjustment lever 324.
After the sliding block 322 is adjusted to a proper height, the sliding rod 323 is adjusted to a proper horizontal position, and then the universal adjusting rod 324 is adjusted to enable the sensor 31 to contact the surface of the part. The run-out data (radial run-out and end run-out data) is collected by the sensor 31 and transmitted to the computer, and the eccentricity and the angle of the radial surface of the reference and the inclination and the angle of the end surface of the reference are obtained by least square fitting, as shown in fig. 8 to 10.
The first motor 141 in the aligning mechanism 14 is controlled to adjust the eccentricity of the aligning plate 12, the second motor 151 in the tilt adjusting mechanism 15 is controlled to adjust the tilt of the tilt adjusting plate 11, and therefore the datum alignment of the parts is guaranteed.
After the datum alignment of the parts, measuring the end jump and the radial jump of the mounting edge of the single-stage rotor disc, and fitting the size and the angle of the eccentricity and the inclination of the mounting edge relative to the datum by a least square method.
In some embodiments, the aligning mechanism 14 and the tilting mechanism 15 of the rotor disc stacking and assembling device are adjusted by driving the connecting rod assembly through a motor, so that when the single-stage rotor disc is measured and aligned with the reference, the eccentricity and the inclination (coaxiality and perpendicularity) of the reference can be automatically aligned according to the spatial position of the part, and the deviation caused by manual alignment is avoided.
In some embodiments, the data acquisition mechanism 3 includes two adjusting frames 32, and the two adjusting frames 32 are oppositely disposed on two sides of the assembly platform 1.
Optionally, two sensors are provided on each of the adjustment brackets 32. That is, two sliding blocks 322 are disposed on the upright 321 of each adjusting frame 32, each sliding block 322 is connected to a sliding rod 323, each sliding rod 323 is connected to a universal adjusting rod 324, and each universal adjusting rod 324 is provided with a sensor.
Further, the sensor 31 includes a first sensor, a second sensor, a third sensor, and a fourth sensor.
The first sensor is used to measure a reference end jump of the rotor disk. The second sensor is used to measure the radial run-out of the datum of the rotor disk. The third sensor is used for measuring the end jump of the mounting edge of the rotor disc. The fourth sensor is used for measuring the radial run-out of the mounting edge of the rotor disc.
The sensor in each of the above embodiments may be a displacement sensor.
In some embodiments, the rotor disk stack assembly device comprises a base 4, the base 4 being configured to carry the air floating mechanism 2 and the assembly platform 1. The two adjusting brackets 32 have two upright posts 321 respectively disposed on two sides of the base 4.
Alternatively, the base 4 may employ a marble table.
The embodiment mainly comprises the alignment of a single-stage rotor disc reference, the measurement of the coaxiality and the perpendicularity of a mounting edge of the single-stage rotor disc relative to the reference, the input of the size and the phase of the unbalance of the single-stage rotor disc and the calculation of the optimal mounting angle of each stage of rotor disc.
A specific method of assembling a rotor disk stack after data acquisition using a rotor disk stack assembly apparatus provided in some embodiments of the present invention is described below.
1) The ith-level rotor disc is installed on the assembly platform 1 through a clamp, the slide block 322 is adjusted to a proper height, the adjusting slide bar 323 enables the universal adjusting rod 324 to have a distance of 10mm with the surface of the part, the joint angle of the universal adjusting rod 324 is adjusted, and the side head of the sensor 31 is enabled to contact the end face or the radial face of the part.
2) And starting an air source of the air floatation mechanism 2, floating the rotary table 22, rotating the rotary table 22, collecting end jump and radial jump data of the reference by the sensor 31, and performing least square fitting to obtain the coaxiality and perpendicularity of the reference.
3) If the fitted coaxiality (eccentricity) and the fitted perpendicularity (inclination) are out of tolerance, the aligning mechanism 14 adjusts and adjusts the coaxiality (eccentricity) of the aligning plate 11, and the inclination adjusting mechanism 15 adjusts and adjusts the perpendicularity (inclination) of the inclination adjusting plate 12. And measuring the end jump and the radial jump of the reference again, if the fitted coaxiality (eccentricity) and the fitted perpendicularity (inclination) are still out of tolerance, continuing to perform aligning and inclination adjusting action for rechecking, and if the fitted coaxiality (eccentricity) and the fitted perpendicularity (inclination) meet the tolerance requirement, performing the next step.
4) The sensor 31 collects the end jump and the radial jump of the mounting edge, and the magnitude and the phase of the coaxiality and the magnitude and the phase of the perpendicularity of the mounting edge relative to the reference are fitted by a least square method; and stored in variables.
5) Disassembling the current rotor disc, installing the next-stage rotor disc, and repeating the steps 2) to 4). So as to obtain the verticality and the coaxial size and phase of the next stage rotor disk.
6) And (3) adjusting the perpendicularity and the coaxiality of the installation edge of each stage of the rotor disc relative to the reference, calculating a deviation matrix of the n stage of the rotor disc, and extracting a coaxiality function of the loudness of the n stage of the rotor disc to the 1 st stage of the rotor disc.
7) And acquiring the size of the unbalance amount of each stage of the rotor disc and the angle relative to the zero point, and calculating the unbalance amount function of the n stages of the rotor discs.
8) And calculating a comprehensive deviation function (total deviation function) of the coaxiality function and the unbalance function, and solving the minimum value of the comprehensive deviation function, namely the corresponding rotor disc installation angle.
Through the above description of the various embodiments, the rotor disk stack assembly method and apparatus provided by the embodiments of the present invention have at least the following features and advantages.
1) Meanwhile, geometric deviation (coaxiality function) and unbalance (unbalance function) are considered, namely the coaxiality of the mounting edge relative to the reference axial direction is considered, the unbalance function is added, the final unbalance is ensured to be within a tolerance range, the geometric deviation is avoided, and the calculation result is more in line with the requirement of engine vibration control.
2) Before assembling each level of rotor disks, acquiring the jumping data of a reference and an installation edge to be tested, fitting by adopting the jumping data of the reference and the installation edge, then carrying out coordinate transformation to obtain a deviation matrix of each level of rotor disks, and calculating an assembly phase when the coaxiality is minimum, namely an optimal assembly position; the assembly is completed at one time according to the assembly angle during the assembly, so that the intermediate trial assembly links are reduced, and the assembly efficiency is greatly improved.
3) Adopt automatic aligning and tilt adjusting mechanism, when single-disk measurement, when the alignment benchmark, through link mechanism and the automatic spatial position according to the part of motor, the off-centre and the slope of alignment benchmark avoid the deviation that manual alignment caused, and the benchmark alignment is efficient, and the degree of accuracy is better.
In the description of the present invention, it should be understood that the terms "first", "second", "third", etc. are used to define the components, and are used only for the convenience of distinguishing the components, and if not otherwise stated, the terms have no special meaning, and thus, should not be construed as limiting the scope of the present invention.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (24)
1. A method of assembling a stack of rotor disks, comprising the steps of:
sequentially acquiring the coaxiality and the deviation degree of the mounting edge of each stage of the rotor disc in the n stages of the rotor discs relative to a reference; calculating a deviation matrix of the n-level rotor disc; extracting a coaxiality deviation function FE of the nth-stage rotor disc relative to the 1 st-stage rotor disc by taking the installation angle beta (i) as a variable from a deviation matrix of the nth-stage rotor disc;
acquiring an unbalance deviation function FU of the n-level rotor disc by taking the installation angle beta (i) as a variable;
acquiring a total deviation function F (FE + k) FU according to the coaxiality deviation function FE and the unbalance deviation function FU, wherein the independent variable of the total deviation function is the installation angle beta (i) of each stage of the rotor disc;
calculating the minimum value by taking the deviation total function as an objective function, wherein the calculated value is the corresponding mounting angle beta (i) of the rotor disc;
wherein n is an integer greater than or equal to 1; k is a coefficient; β (i) is an installation angle of the ith stage rotor disk relative to the 1 st stage rotor disk; i represents the number of stages of the rotor disc and takes a value of 1-n.
2. A method of assembling a stack of rotor disks according to claim 1, wherein the method of sequentially acquiring the coaxiality and the deviation of the mounting edge of the rotor disk of each of the n stages of rotor disks from a reference is:
performing reference alignment on the ith-stage rotor disc;
measuring end jump and radial jump of the mounting edge of the ith-level rotor disc, and fitting the size and angle of coaxiality and the size and angle of perpendicularity of the mounting edge of the ith-level rotor disc relative to a reference by a least square method;
wherein, the value of i is 1-n, and n is an integer greater than or equal to 1.
3. A method of assembling a stack of rotor disks according to claim 1, wherein the calculated deviation matrix for n-stage rotor disks is:
wherein, dRiA rotation deviation matrix of the mounting edge of the ith-stage rotor disc relative to a reference; dPiA translation matrix of the mounting edge of the i-th stage rotor disc relative to a datum; siA transformation matrix generated when the ith stage rotor disk rotates relative to the ith-1 stage rotor disk; sjFor transformations effected by rotation of the j-th stage rotor disk relative to the j-1 th stage rotor diskA matrix; i and j represent the stage number of the rotor disc, the value is 1-n, and n is an integer greater than or equal to 1; o isTIs the transposition of the zero matrix;
and i is the coordinate of the circle center of the mounting edge of the ith-stage rotor disc, and the value of i is 1-n.
4. The method of assembling a stack of rotor disks according to claim 3,
the method for extracting the coaxiality deviation function FE of the nth-stage rotor disc relative to the 1 st-stage rotor disc by taking the installation angle beta (i) as a variable from the deviation matrix comprises the following steps:
in the deviation matrix, the deviation matrix is obtained,
is a translation matrix of the nth stage rotor disk relative to the 1 st stage rotor disk, which can also be expressed as [ dX, dY, dZ]And dX, dY and dZ respectively represent the translation quantity functions of the nth stage rotor disk relative to the 1 st stage rotor disk in the horizontal coordinate direction, the vertical coordinate direction and the vertical coordinate direction;
the coaxiality deviation function FE of the nth-stage rotor disc relative to the 1 st-stage rotor disc by taking the installation angle beta (i) as a variable is as follows:
the dX is an abscissa displacement function of the nth-stage rotor disc relative to the 1 st-stage rotor disc, the variable is an installation angle beta (i) of the ith-stage rotor disc relative to the 1 st-stage rotor disc, the value of i is 1-n, and n is an integer greater than or equal to 1;
dY is a vertical coordinate displacement function of the nth stage rotor disc relative to the 1 st stage rotor disc, the variable is a mounting angle beta (i) of the ith stage rotor disc relative to the 1 st stage rotor disc, the value of i is 1-n, and n is an integer greater than or equal to 1.
5. A method of assembling a stack of rotor disks according to claim 2, wherein the datum alignment of the i-th stage rotor disk is performed by:
mounting the ith-grade rotor disc on a rotor disc stacking and assembling device, and acquiring the end jump and the radial jump of the datum of the ith-grade rotor disc; obtaining the coaxiality and the angle of the datum of the i-th-stage rotor disc and the verticality and the angle of the datum of the i-th-stage rotor disc by adopting least square fitting; if the coaxiality and the verticality of the reference of the ith-level rotor disk exceed the preset range, aligning and adjusting the rotor disk of the ith-level rotor disk, and fitting the coaxiality and the verticality of the reference of the ith-level rotor disk by adopting a least square method until the coaxiality and the verticality are within the preset range;
wherein the value of i is 1-n; n is an integer of 1 or more.
6. A method of assembling a stack of rotor disks according to claim 1, wherein the unbalance deviation function FU of the n-stage rotor disks with the mounting angle β (i) as a variable is:
wherein q (i) is the unbalance amount of the ith-stage rotor disc and is obtained by measurement of a balancing machine; α (i) the angle of the ith stage rotor disk relative to zero, obtained by balancing machine measurements; β (i) is an installation angle of the ith stage rotor disk relative to the 1 st stage rotor disk; omega is the rotation speed of the balancing machine.
7. A rotor disc stack assembly arrangement for implementing the rotor disc stack assembly method of claim 5, comprising an assembly platform (1) for carrying rotor discs, the assembly platform (1) comprising:
a tilt adjusting plate (11) the top of which is used for mounting a rotor disc;
an adjusting plate (12) which is arranged below the inclination adjusting plate (11);
the aligning mechanism (14) is connected with the aligning plate (12) and is used for driving the aligning plate (12) and the inclination adjusting plate (11) to move along a horizontal plane;
the tilt adjusting mechanism (15) is connected with the tilt adjusting plate (11) and is used for driving the tilt adjusting plate (11) to perform pitching motion relative to the centering plate (12); and the combination of (a) and (b),
a connector (13), the connector (13) comprising:
an inner ring connected to the tilt plate (11); and the combination of (a) and (b),
an outer ring connected to the aligning plate (12) and the inner ring;
wherein the inner ring is tiltable relative to the outer ring.
8. The rotor disc stack assembly of claim 7, characterized in that the connecting piece (13) is a spherical plain bearing.
9. The rotor disc stack assembly arrangement of claim 7, characterized in that the centering mechanism (14) comprises:
a first link assembly connected to the aligning plate (12) for pushing the aligning plate (12) to move along a horizontal plane; and the combination of (a) and (b),
a first motor (141) drivingly connected to the first link assembly.
10. The rotor disc stack assembly of claim 9, wherein the first link assembly comprises:
a first rod (142) connected to the first motor (141) through a first spherical pair; and the combination of (a) and (b),
the first ends of the two second rods (143) are connected with the first rod (142) through a second spherical pair; the second ends of the two second rods (143) are connected with the aligning plate (12) through a third spherical pair.
11. The rotor disc stack assembly arrangement of claim 7, wherein the tilt mechanism (15) comprises:
the second connecting rod assembly is connected to the tilt adjusting plate (11) and used for pushing the tilt adjusting plate (11) to do pitching motion; and the combination of (a) and (b),
a second motor (151) drivingly connected to the second linkage assembly.
12. The rotor disc stack assembly of claim 11, wherein the second link assembly comprises:
a third lever (152) connected to the second motor (151) through a fourth spherical pair; and the combination of (a) and (b),
a fourth rod (153), a first end of the fourth rod (153) is connected with the third rod (152) through a fifth spherical pair; and the second end of the fourth rod (153) is connected with the inclination adjusting plate (11) through a sixth spherical pair.
13. Rotor disc stack assembly according to claim 7, characterized in that the assembly platform (1) comprises two centering mechanisms (14) and two tilt adjusting mechanisms (15).
14. Rotor disc stack assembly according to claim 7, comprising an air-floating mechanism (2) for carrying the assembly platform (1).
15. The rotor disc stack assembly arrangement of claim 14, characterized in that the air-floating mechanism (2) comprises:
the air conditioner comprises a base (21), wherein an air cavity (211) is arranged in the base (21), the base (21) is provided with an air inlet hole (212) and an air outlet hole, the air inlet hole (212) is used for introducing air into the air cavity (211), and the air outlet hole is used for discharging the air in the air cavity (211); and the combination of (a) and (b),
a turntable (22) which is arranged above the base (21), is used for bearing the assembling platform (1) and can rotate relative to the base (21);
wherein the gas exhausted from the exhaust hole of the base (21) is used for floating the turntable (22).
16. The rotor disk stack assembly of claim 15,
the air cavity (211) is an annular air cavity arranged in the base (21);
the exhaust hole is equipped with a plurality ofly along annular air cavity, the exhaust hole includes:
a first aperture (213) communicating with the air cavity (211); and the combination of (a) and (b),
a second hole (214) that communicates with the first hole (213) and blows gas toward the turntable (22);
wherein the second aperture (214) has a smaller flow area than the first aperture (213) for pressurising the gas flow.
17. The rotor disk stack assembly of claim 15,
the top of the base (21) is provided with a conical groove;
the bottom of the rotary table (22) is provided with a conical bottom (221) matched with the conical groove;
and in the floating state of the rotary table (22), a floating gap (23) for accommodating the air flow blown out from the air exhaust hole is formed between the conical groove and the matching surface of the conical bottom (221).
18. A rotor disc stack assembly arrangement according to claim 17, wherein the conical slot is provided with a relief hole (215), the relief hole (215) communicating with the air cavity (211) for blowing an air flow towards the conical bottom (221).
19. A rotor disc stack assembly arrangement according to claim 17, wherein a mutually cooperating sealing structure is provided between the base (21) and the turntable (22) for sealing a floating gap (23) formed between the mating surfaces of the conical groove and the conical bottom (221).
20. A rotor disc stack assembly as claimed in claim 7, comprising a data acquisition mechanism (3) for acquiring the radial jumps and the end jumps of the rotor discs on the assembly platform (1).
21. A rotor disc stack assembly as claimed in claim 20, wherein the data acquisition means (3) comprises:
a sensor (31) for measuring the radial run-out and the end run-out of the rotor disc;
an adjusting bracket (32) for moving the sensor (31) relative to the rotor disc for position adjustment.
22. A rotor disc stack assembly arrangement according to claim 21, wherein the adjusting bracket (32) comprises:
a column (321) provided on one side of the assembly platform (1);
a slider (322) which is provided on the column (321) and can slide up and down along the column (321);
a slide bar (323) provided to the slider (322) and capable of horizontally sliding with respect to the slider (322); and the combination of (a) and (b),
and a universal adjustment lever (324) connected to the slide bar (323), wherein the sensor (31) is provided on the universal adjustment lever (324).
23. A rotor disc stack assembly arrangement according to claim 21, wherein the data acquisition means (3) comprises two of the adjustment brackets (32), the two adjustment brackets (32) being arranged opposite each other on both sides of the assembly platform (1).
24. A rotor disc stack assembly arrangement according to claim 21, wherein the sensor (31) comprises:
a first sensor for measuring a reference end jump of the rotor disc;
a second sensor for measuring a radial run-out of a datum of the rotor disc;
a third sensor for measuring an end jump of the mounting edge of the rotor disc; and the combination of (a) and (b),
a fourth sensor for measuring the radial run out of the mounting edge of the rotor disk.
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| CN105870708A (en) * | 2016-06-01 | 2016-08-17 | 河北科瑞达仪器科技股份有限公司 | High-impedance coaxial connector for sensor |
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| JP2747566B2 (en) * | 1990-04-12 | 1998-05-06 | 株式会社竹中工務店 | Construction method of straight pillar |
| CN102102986B (en) * | 2009-12-18 | 2012-05-30 | 西安威而信精密仪器有限公司 | Roundness/cylindricality measurement workbench capable of automatically regulating center and inclination |
| CN105737773B (en) * | 2010-11-12 | 2019-04-19 | Ev 集团 E·索尔纳有限责任公司 | For measuring the thickness degree of wafer stacking and the measuring device and method of lattice defect |
| CN103899367B (en) * | 2014-02-14 | 2015-07-29 | 哈尔滨工业大学 | The stacking assembly method of aeroengine rotor and device |
| CN103791820B (en) * | 2014-02-14 | 2015-11-25 | 哈尔滨工业大学 | Based on aeroengine rotor assembly method and the device of the stacking principle of vector |
| CN205724168U (en) * | 2016-06-01 | 2016-11-23 | 河北科瑞达仪器科技股份有限公司 | A kind of sensor high impedance coaxial connector |
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| CN102538689A (en) * | 2011-12-29 | 2012-07-04 | 中国科学院上海光学精密机械研究所 | Centering and locating device of optical system and using method thereof |
| CN105870708A (en) * | 2016-06-01 | 2016-08-17 | 河北科瑞达仪器科技股份有限公司 | High-impedance coaxial connector for sensor |
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