CN113074680A - Device and method for measuring axial maximum play amount of rotor - Google Patents

Device and method for measuring axial maximum play amount of rotor Download PDF

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Publication number
CN113074680A
CN113074680A CN202010010223.1A CN202010010223A CN113074680A CN 113074680 A CN113074680 A CN 113074680A CN 202010010223 A CN202010010223 A CN 202010010223A CN 113074680 A CN113074680 A CN 113074680A
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rotor
engine
load
delta
measuring
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CN113074680B (en
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刘浩
车俊龙
王鹏
陈静荣
贺艳均
邓锐
范骏鹏
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AECC Commercial Aircraft Engine Co Ltd
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AECC Commercial Aircraft Engine Co Ltd
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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
    • G01B21/02—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 length, width, or thickness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00—Testing of engines

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  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The invention provides a device and a method for measuring the maximum axial movement amount of a rotor, wherein the device comprises an engine stator component, an engine rotor component, a lifting appliance, a meter frame, a displacement sensor, a load display instrument and a load applying device, the meter frame is fixed on the engine stator component, the displacement sensor is installed on the meter frame, the lifting appliance is connected to the engine rotor component, the load display instrument is installed on the lifting appliance, and the load applying device is installed on the load display instrument and applies tensile force along the axis of an engine. The measuring method of the invention has the advantages that the axial play amount of the rotor is accurately measured, the repeatability of the measuring result of the measuring method in the measuring method of the maximum axial play amount of the rotor is good, the requirements of the measuring method on equipment, tools and personnel are low, and the measuring method is easy to realize. The measuring method has universality for measuring the axial play quantity of the rotor with a similar rotor-stator structure.

Description

Device and method for measuring axial maximum play amount of rotor
Technical Field
The invention relates to the field of engine assembly and engine measurement, in particular to a device and a method for measuring the maximum axial movement amount of a rotor.
Background
FIG. 1 is a schematic view of a prior art rotor support system. As shown in fig. 1, the stator assembly 10 and the rotor assembly 20 of the aero-engine of the type described above have a ball bearing 30 at one end of the rotor support system as a thrust fulcrum and a rod bearing 40 at the other end.
The maximum axial play amount of the rotor is an important index for judging whether the ball bearing is assembled in place and avoiding scraping and grinding of the rotor and the stator in the working process of the engine. By fixing the stator assembly 10, applying an axial load to the rotor assembly 20 measures the variation of the rotor assembly 20 relative to the stator assembly 10 to obtain the maximum axial play of the rotor, however, different measurement methods and loads result in different maximum axial play of the rotor.
In view of the above, those skilled in the art have devised a method for measuring the maximum axial play of a rotor, which is intended to overcome the above technical problems.
Disclosure of Invention
The invention aims to overcome the defects that different measuring methods and loads obtain different maximum axial play amounts of a rotor in the prior art, and provides a measuring device and a measuring method for the maximum axial play amount of the rotor.
The invention solves the technical problems through the following technical scheme:
the device for measuring the maximum axial displacement of the rotor is characterized by comprising an engine stator component, an engine rotor component, a lifting appliance, a meter frame, a displacement sensor, a load display instrument and a load applying device, wherein the meter frame is fixed on the engine stator component, the displacement sensor is installed on the meter frame, the lifting appliance is connected to the engine rotor component, the load display instrument is installed on the lifting appliance, and the load applying device is installed on the load display instrument and applies tensile force along the axis of the engine.
According to one embodiment of the invention, the load display instrument is connected to the spreader and the load applying device and displays the load applied by the load applying device along the engine axis.
According to one embodiment of the invention, the measuring rod of the displacement sensor is vertically contacted with the end face of the engine rotor assembly to measure the movement amount of the engine rotor assembly relative to the engine stator assembly.
According to one embodiment of the invention, the engine stator assembly is mounted on a rigid mount.
According to one embodiment of the invention, one end of the engine stator assembly and one end of the engine rotor assembly are connected through an engine ball bearing, and the other end of the engine stator assembly and the other end of the engine rotor assembly are connected through an engine rod bearing.
The invention also provides a method for measuring the maximum axial play amount of the rotor, which is characterized in that the measuring method adopts the device for measuring the maximum axial play amount of the rotor, and the method for measuring the maximum axial play amount of the rotor applies axial load to the rotor assembly through fixing the stator assembly and measures the variation of the rotor assembly relative to the stator assembly;
when the load is not less than the threshold value, the increment of the rotor assembly relative to the variation of the stator assembly is in direct proportion to the increment of the load, and the axial load is applied in sequence according to the same increment; and when the increment of the variation of the rotor assembly relative to the stator assembly is not changed for three times continuously, measuring to obtain the axial maximum play amount of the rotor.
According to one embodiment of the invention, the variation of the rotor assembly relative to the stator assembly is equal to the sum of the axial play of the rotor and the deformation of the rotor assembly and the stator assembly caused by the axial load, namely delta3＝δ0+δ1+δ2；
Wherein, delta1Representing the amount of deformation of the rotor assembly caused by the axial load P; delta2Represents the deformation of the stator assembly caused by the axial load P; delta0Representing the axial play of the rotor; delta3Representing the amount of change in the rotor assembly relative to the stationary assembly.
According to one embodiment of the invention, when the axial load reaches a threshold value Q, the engine ball bearing is in an extreme position, and the corresponding axial play amount of the rotor is the maximum axial play amount δ of the rotor0max，
I.e. delta0max＝ΔY(P≥Q)。
According to one embodiment of the invention, when the axial load is greater than or equal to the threshold value Q, the increment of the variation of the rotor assembly relative to the stator assembly is proportional to the increment of the load;
maximum axial play delta of rotor0maxIs composed of
δ0max＝δ3-(k1-k2)P(P≥Q)。
According to one embodiment of the invention, the measuring method comprises the following steps:
S1mounting a measuring device of the axial maximum play amount of the rotor;
S2the load applying device does not apply tension, the reading of the load display instrument is zero, the engine rotor assembly presses the engine ball bearing to the limit position by means of self weight, and the reading Y of the displacement sensor at the moment is recorded0；
S3The load applying device applies tension for the first time along the axis of the engine to enable the reading of the load display instrument to be delta P, and the reading Y of the displacement sensor at the moment is recorded1Calculating the variation quantity delta Y of the readings of the displacement sensor1＝Y1-Y0；
S4The load applying device applies tension for the second time along the axis of the engine to enable the number of readings of the load display instrument to be 2 delta P, namely the number change quantity of the load display instrument is delta P, and the number Y of the displacement sensor at the moment is recorded2Calculating the displacement sensor representationAmount of change of number Δ Y2＝Y2-Y1。
According to an embodiment of the invention, said step S1The method specifically comprises the following steps:
S11adjusting the axis of the engine to be in a vertical state;
S12connecting the engine stator component with the rigid seat;
S13connecting the lifting appliance and the engine rotor assembly;
S14connecting the load display instrument with the lifting appliance;
S15connecting the load applying device with the load display instrument;
S16fixing the meter frame to the engine stator assembly;
S17a displacement sensor is arranged on the gauge stand, and a measuring rod of the displacement sensor vertically falls on the end surface of the engine rotor assembly;
S18and the axis of the load applying device is adjusted to coincide with the engine axis.
According to one embodiment of the invention, the measuring method further comprises the steps of:
S5if the index variation of the displacement sensor is the same, that is, Δ Y2＝△Y1If the axial play amount of the rotor is delta Y ═ Y1-Y0；
S6If the indication number variation of the displacement sensor is different, that is, delta Y2≠△Y1The load applying device continuously applies tension along the axis of the engine, the indication variation of the load display instrument is delta P every time, the indication of the displacement sensor is recorded, and the variation delta Y of the indication of the displacement sensor is calculated;
S7setting a load applying device to apply tension along the engine for the ith time, and recording the reading Y of the displacement sensoriCalculating the variation DeltaY of the index of the displacement sensori＝Yi-Yi-1(i ≧ 2), when the index change amount of the displacement sensor is the same three times in succession, that is, Δ Yi＝ΔYi-1＝ΔYi-2At this time, the load applying device stops applying the tensile force.
S8Recording the maximum axial movement quantity delta Y ═ delta Y of the rotori-2＝Yi-2-Y0。
The positive progress effects of the invention are as follows:
the device and the method for measuring the maximum axial play amount of the rotor can accurately measure the maximum axial play amount of the rotor by analyzing the structure and the measurement principle of the engine.
The device and the method for measuring the axial maximum play amount of the rotor have the following advantages:
firstly, the axial play amount of the rotor measured by the measuring method is accurate;
secondly, the repeatability of the measuring result of the measuring method in the measuring method of the axial maximum play amount of the rotor is good;
the measuring method has low requirements on equipment, tools and personnel and is easy to realize;
and fourthly, the measuring method has universality for measuring the axial play quantity of the rotor with the similar rotor-stator structure.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings in which like reference numerals denote like features throughout the several views, wherein:
FIG. 1 is a schematic view of a prior art rotor support system.
Fig. 2 is a schematic diagram of the measurement principle of the maximum axial play of the rotor.
Fig. 3 is a schematic diagram of measuring the axial play amount of the rotor of the measuring device for the axial maximum play amount of the rotor according to the present invention.
[ reference numerals ]
Engine stator assembly 10
Engine rotor assembly 20
Ball bearing 30
Rod bearing 40
Lifting appliance 100
Watch holder 200
Displacement sensor 300
Load display instrument 400
Load applying device 500
Rigid seat 600
Engine ball bearing 21
Engine rod bearing 22
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.
Further, although the terms used in the present invention are selected from publicly known and used terms, some of the terms mentioned in the description of the present invention may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein.
Furthermore, it is required that the present invention is understood, not simply by the actual terms used but by the meaning of each term lying within.
Fig. 2 is a schematic diagram of the measurement principle of the maximum axial play of the rotor. Fig. 3 is a schematic view of measuring the axial play amount of the rotor of the measuring device for the axial maximum play amount of the rotor according to the present invention.
As shown in fig. 2 and 3, the present invention provides a device for measuring the maximum rotor axial play amount, which comprises an engine stator assembly 10, an engine rotor assembly 20, a hanger 100, a meter frame 200, a displacement sensor 300, a load indicator 400 and a load applying device 500, wherein the meter frame 200 is fixed on the engine stator assembly 10, the displacement sensor 300 is mounted on the meter frame 200, the hanger 100 is connected to the engine rotor assembly 20, the load indicator 400 is mounted on the hanger 100, and the load applying device 500 is mounted on the load indicator 400 and applies a tensile force along the axis of an engine.
Preferably, the load display instrument 400 is connected to the spreader 100 and the load applying device 500 to display the load applied by the load applying device 500 along the engine axis.
Further, the measuring rod of the displacement sensor 300 vertically contacts with an end face of the engine rotor assembly 20, and measures the amount of play of the engine rotor assembly 20 relative to the engine stator assembly 10.
Here the engine stator assembly 20 is mounted on a rigid mount 600 to which the watch frame 200 can be secured. The rigid mount 600 is rigid and connects the stator assembly 10 of the engine to limit axial movement thereof.
One end of the engine stator assembly 10 and one end of the engine rotor assembly 20 are connected through an engine ball bearing 21, and the other end of the engine stator assembly 10 and the other end of the engine rotor assembly 20 are connected through an engine rod bearing 22. The engine rotor assembly 20 is supported by an engine ball bearing 21 and an engine rod bearing 22, the engine ball bearing 21 has a thrust function, and the engine rod bearing 22 can ensure that the engine stator assembly 10 and the engine rotor assembly 20 are axially overlapped with the engine.
According to the structural description, the invention also provides a method for measuring the maximum axial play amount of the rotor, which adopts the device for measuring the maximum axial play amount of the rotor, and the method for measuring the maximum axial play amount of the rotor applies an axial load to the rotor assembly by fixing the stator assembly to measure the variation of the rotor assembly relative to the stator assembly; when the load is not less than the threshold value, the increment of the rotor assembly relative to the variation of the stator assembly is in direct proportion to the increment of the load, and the axial load is applied in sequence according to the same increment; when the increment of the variation of the rotor assembly relative to the stator assembly is not changed for three times continuously, the maximum axial movement of the rotor is measured.
Preferably, the axial play of the rotor can be measured by fixing the stator assembly, applying an axial load P to the rotor assembly, and measuring the rotorVariation delta of assembly relative to stator assembly3。
The variation of the rotor assembly relative to the stator assembly is equal to the sum of the axial play of the rotor and the deformation of the rotor assembly and the stator assembly caused by the axial load, namely
δ3＝δ0+δ1+δ2(formula 1)
Wherein, delta1Representing the amount of deformation of the rotor assembly caused by the axial load P; delta2Represents the deformation of the stator assembly caused by the axial load P; delta0Representing the axial play of the rotor; delta3Representing the amount of change in the rotor assembly relative to the stationary assembly.
δ1The deformation of the rotor component caused by the axial load P is expressed by the calculation formula
Figure RE-GDA0002502014680000061
δ2The deformation of the stator component caused by the axial load P is expressed by the calculation formula
Figure RE-GDA0002502014680000062
Then there is
δ0＝δ3-(k1-k2) P (formula 4)
Let the parameter k be k ═ k1-k2(formula 5)
When the engine structure and the position of application of the load are determined, the parameter k is a constant value.
Then there is
δ0＝δ3-kP (equation 6)
The axial play of the rotor is caused by the axial play of the ball bearing in the assembled state of the whole machine, and the condition that the ball bearing is at the limit position when the axial load reaches a threshold value Q is met, and the corresponding axial play of the rotor is the maximum axial play delta of the rotor0maxI.e. by
δ0maxΔ Y (P ≧ Q) (equation 7)
Then at different axial loads (P)1、P2) Relative change delta of lower rotor assembly relative to stator assembly3Is composed of
Figure RE-GDA0002502014680000071
Satisfy the requirement of
Figure RE-GDA0002502014680000072
If load (P)1、P2) Not less than the threshold value Q, then there is
Δδo＝0
Δδ3K Δ P (formula 10)
That is, when the load P is not less than the threshold Q, the increment of the variation of the rotor assembly relative to the stator assembly is proportional to the increment of the load.
Maximum axial play delta of rotor0maxIs composed of
δ0max＝δ3-(k1-k2) P (P is not less than Q) (formula 11)
Designing the rigid mount to make the parameters
Figure RE-GDA0002502014680000073
The engine stator component (ball bearing end) is vertically arranged on the rigid seat and is small enough (less than or equal to 0.001 mu m/Kg), the threshold Q of the ball bearing of the aero-engine is about 25Kg, the self weight W of the rotor component is far more than the threshold Q, the ball bearing can be judged to be at the front limit position, and the deformation delta of the rotor component can be judged1About 0, parameter k of the stator component1Sufficiently large, i.e. the amount of deformation delta of the stator assembly2Also about 0, and the initial distance of the rotor assembly relative to the stator assembly measured at this time may be set to zero.
Parameter k of rotor assembly of model aircraft engine1About 0.07 μm/Kg, rotor shaftThe measurement precision towards the maximum displacement is 0.01mm, and the load increment delta P is selected to be 30Kg, so that after the load P reaches the sum of the self weight W of the rotor and the threshold Q of the ball bearing, the increment delta of the variation of the rotor component relative to the stator component is obtained3Can be identified by a displacement sensor without influencing the precision of the axial maximum play of the rotor.
Since there is a rod bearing at the rear end of the rotor assembly, it is ensured that the load is applied backwards along the axis, with each increase in Δ P, the load P can be expressed as
P ═ i Δ P (i ≧ 1) (equation 12)
Increment delta of rotor assembly to stator assembly variation3Stopping increasing the load when the load is not changed for three times in succession can be expressed as
Δδ3(m)＝Δδ3(m+1)＝Δδ3(m +2) ═ constant (m.gtoreq.1) (equation 13)
And should satisfy
(m-1) Δ P ≦ m Δ P (W + Q) (formula 14)
When the load P is equal to m delta P, the load acting on the rotor-stator assembly is (m delta P-W), and the condition is satisfied
Q is less than or equal to (m delta P-W) < 2 delta P (formula 15)
Can judge the deformation delta of the stator component when the ball bearing is at the rear limit position2(m) about 0, the amount of rotor assembly deformation δ1(m) is less than 0.005mm, the maximum axial play amount of the rotor is delta0maxIs composed of
δ0max＝δ3(m)-δ1(m) (i ═ m) (equation 16)
And due to the deflection delta of the rotor assembly1(m) is small, and does not influence the measurement precision, so the maximum axial movement of the rotor is approximately
ΔY＝δ3(m) (equation 17)
More specifically, the method for measuring the maximum axial play amount of the rotor specifically comprises the following steps:
S1and a measuring device for mounting the axial maximum play amount of the rotor.
Wherein, the step S1The method specifically comprises the following steps:
S11adjusting the axis of the engine to be in a vertical state;
S12connecting the engine stator component with the rigid seat;
S13connecting the lifting appliance and the engine rotor assembly;
S14connecting the load display instrument with the lifting appliance;
S15connecting the load applying device with the load display instrument;
S16fixing the meter frame to the engine stator assembly;
S17a displacement sensor is arranged on the gauge stand, and a measuring rod of the displacement sensor vertically falls on one end face of the engine rotor assembly;
S18and the axis of the load applying device is adjusted to coincide with the engine axis.
S2The load applying device does not apply tension, the reading of the load display instrument is zero, the engine rotor assembly presses the engine ball bearing to the limit position by means of self weight, and the reading Y of the displacement sensor at the moment is recorded0。
S3The load applying device applies tension for the first time along the axis of the engine to enable the reading of the load display instrument to be delta P, and the reading Y of the displacement sensor at the moment is recorded1Calculating the variation quantity delta Y of the readings of the displacement sensor1＝Y1-Y0。
S4The load applying device applies tension for the second time along the axis of the engine to enable the reading of the load display instrument to be 2 delta P, namely the reading change quantity of the load display instrument is delta P, and the reading Y of the displacement sensor at the moment is recorded2Calculating the variation quantity delta Y of the readings of the displacement sensor2＝Y2-Y1。
S5If the index variation of the displacement sensor is the same, that is, Δ Y2＝△Y1If the axial play amount of the rotor is delta Y ═ Y1-Y0；
S6If the displacement sensor isThe number variations being different, i.e. DeltaY2≠△Y1The load applying device continuously applies tension along the axis of the engine, the indication variation of the load display instrument is delta P every time, the indication of the displacement sensor is recorded, and the variation delta Y of the indication of the displacement sensor is calculated;
S7setting a load applying device to apply tension along the engine for the ith time, and recording the reading Y of the displacement sensoriCalculating the variation DeltaY of the index of the displacement sensori＝Yi-Yi-1(i ≧ 2), when the index change amount of the displacement sensor is the same three times in succession, that is, Δ Yi＝ΔYi-1＝ΔYi-2At this time, the load applying device stops applying the tensile force.
S8Recording the maximum axial movement quantity delta Y ═ delta Y of the rotori-2＝Yi-2-Y0。
The invention discloses a device and a method for measuring the maximum axial play amount of a rotor, which apply axial load to a rotor assembly by fixing a stator assembly, measure the variation of the rotor assembly relative to the stator assembly, and analyze the constituent elements of the variation as the axial play amount of the rotor, the deformation of the rotor assembly caused by the axial load and the deformation of the rotor assembly caused by the axial load.
According to the characteristic that the axial play amount of the rotor is unchanged when the axial play amount of the rotor reaches a threshold value, the increment of the variation of the rotor assembly relative to the stator assembly is obtained in a reasoning mode and is in direct proportion to the increment of the load when the load is not smaller than the threshold value.
In summary, the device and the method for measuring the maximum axial play amount of the rotor can accurately measure the maximum axial play amount of the rotor by analyzing the structure and the measurement principle of the engine. The device and the method for measuring the axial maximum play amount of the rotor have the following advantages:
firstly, the axial play amount of the rotor measured by the measuring method is accurate;
secondly, the repeatability of the measuring result of the measuring method in the measuring method of the axial maximum play amount of the rotor is good;
the measuring method has low requirements on equipment, tools and personnel and is easy to realize;
and fourthly, the measuring method has universality for measuring the axial play quantity of the rotor with the similar rotor-stator structure.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims (12)

1. The device for measuring the axial maximum running amount of the rotor is characterized by comprising an engine stator assembly, an engine rotor assembly, a lifting appliance, a meter frame, a displacement sensor, a load display instrument and a load applying device, wherein the meter frame is fixed on the engine stator assembly, the displacement sensor is installed on the meter frame, the lifting appliance is connected onto the engine rotor assembly, the load display instrument is installed on the lifting appliance, and the load applying device is installed on the load display instrument and applies tensile force along the axis of the engine.
2. The device for measuring the maximum axial play amount of a rotor according to claim 1, wherein the load display instrument is connected to the hanger and the load applying device and displays the load applied by the load applying device along the engine axis.
3. The device for measuring the maximum axial play of a rotor as claimed in claim 1, wherein the measuring rod of the displacement sensor is vertically contacted with one end face of the engine rotor assembly to measure the play of the engine rotor assembly relative to the engine stator assembly.
4. The rotor axial maximum play measurement device of claim 1, wherein the motor stator assembly is mounted on a rigid mount.
5. The apparatus for measuring the maximum axial play of a rotor as claimed in claim 1, wherein one end of said engine stator assembly and one end of said engine rotor assembly are connected by an engine ball bearing, and the other end of said engine stator assembly and the other end of said engine rotor assembly are connected by an engine rod bearing.
6. A method for measuring the maximum axial play amount of a rotor, which is characterized by using the device for measuring the maximum axial play amount of the rotor according to any one of claims 1 to 5, and measuring the variation of a rotor assembly relative to a stator assembly by fixing the stator assembly and applying an axial load to the rotor assembly;
when the load is not less than the threshold value, the increment of the rotor assembly relative to the variation of the stator assembly is in direct proportion to the increment of the load, and the axial load is applied in sequence according to the same increment; and when the increment of the variation of the rotor assembly relative to the stator assembly is not changed for three times continuously, measuring to obtain the axial maximum play amount of the rotor.
7. The method for measuring the maximum axial play of a rotor as claimed in claim 1, wherein the variation of the rotor assembly relative to the stator assembly is equal to the sum of the axial play of the rotor and the deformation of the rotor assembly and the stator assembly caused by the axial load, namely delta3＝δ0+δ1+δ2；
Wherein, delta1Representing the amount of deformation of the rotor assembly caused by the axial load P; delta2Representing the amount of deformation of the stator assembly caused by the axial load P; delta0Representing the axial play of the rotor; delta3Showing rotor assembly relative to stator assemblyThe amount of change in (c).
8. Method for measuring the maximum axial play of a rotor according to claim 7, wherein when the axial load reaches a threshold value Q, the ball bearings of the engine are in the extreme positions, and the corresponding axial play of the rotor is the maximum axial play δ of the rotor0maxI.e. delta0max＝ΔY (P≥Q)。
9. The method of claim 7, wherein when the axial load is equal to or greater than a threshold Q, the amount of change of the rotor assembly relative to the stator assembly is increased in proportion to the load increase;
maximum axial play delta of rotor0maxIs delta0max＝δ3-(k1-k2)P (P≥Q)。
10. The method for measuring the maximum axial play amount of a rotor according to claim 6, comprising the steps of:
S1mounting a measuring device of the axial maximum play amount of the rotor;
S2the load applying device does not apply tension, the reading of the load display instrument is zero, the engine rotor assembly presses the engine ball bearing to the limit position by means of self weight, and the reading Y of the displacement sensor at the moment is recorded0；
S3The load applying device applies tension for the first time along the axis of the engine to enable the reading of the load display instrument to be delta P, and the reading Y of the displacement sensor at the moment is recorded1Calculating the variation quantity delta Y of the readings of the displacement sensor1＝Y1-Y0；
S4The load applying device applies tension for the second time along the axis of the engine to enable the reading of the load display instrument to be 2 delta P, namely the reading change quantity of the load display instrument is delta P, and the reading Y of the displacement sensor at the moment is recorded2Calculating the reading of said displacement sensorAmount of change DeltaY2＝Y2-Y1。
11. The method for measuring the maximum axial play amount of a rotor according to claim 10, wherein the step S1The method specifically comprises the following steps:
S11adjusting the axis of the engine to be in a vertical state;
S12connecting the engine stator component with the rigid seat;
S13connecting the lifting appliance and the engine rotor assembly;
S14connecting the load display instrument with the lifting appliance;
S15connecting the load applying device with the load display instrument;
S16fixing the meter frame to the engine stator assembly;
S17a displacement sensor is arranged on the gauge stand, and a measuring rod of the displacement sensor vertically falls on one end face of the engine rotor assembly;
S18and the axis of the load applying device is adjusted to coincide with the engine axis.
12. The method for measuring the maximum axial play of a rotor as set forth in claim 11, further comprising the steps of:
S5if the index variation of the displacement sensor is the same, that is, Δ Y2＝△Y1If the axial play amount of the rotor is delta Y ═ Y1-Y0；
S6If the indication number variation of the displacement sensor is different, that is, delta Y2≠△Y1The load applying device continues to apply tension along the axis of the engine, the indication variation of the load display instrument is delta P every time, the indication of the displacement sensor is recorded, and the variation delta Y of the indication of the displacement sensor is calculated;
S7setting a load applying device to apply tension along the engine for the ith time, and recording the reading Y of the displacement sensoriCalculating the reading of the displacement sensorChange amount of (a) Yi＝Yi-Yi-1(i is more than or equal to 2), when the indication change quantity of the displacement sensor is the same for three times continuously, namely delta Yi＝ΔYi-1＝ΔYi-2At this time, the load applying device stops applying the tensile force.
S8Recording the maximum axial movement quantity delta Y ═ delta Y of the rotori-2＝Yi-2-Y0。
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CN102023091A (en) * 2010-10-22 2011-04-20 中国南方航空工业(集团)有限公司 Aircraft engine casing static test method and testing assembly thereof
CN106499728A (en) * 2015-09-08 2017-03-15 中航商用航空发动机有限责任公司 Turn the method for adjustment of stator component and its bias
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