CN114964023A - Tool and method for measuring size of main bearing of large-diameter tunneling machine - Google Patents

Tool and method for measuring size of main bearing of large-diameter tunneling machine Download PDF

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CN114964023A
CN114964023A CN202210771779.1A CN202210771779A CN114964023A CN 114964023 A CN114964023 A CN 114964023A CN 202210771779 A CN202210771779 A CN 202210771779A CN 114964023 A CN114964023 A CN 114964023A
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main bearing
diameter
value
distance
detection position
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Inventor
刘飞香
程永亮
麻成标
何其平
王婷
崔二飚
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China Railway Construction Heavy Industry Group Co Ltd
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China Railway Construction Heavy Industry Group 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
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
    • G01B11/12—Measuring arrangements characterised by the use of optical techniques for measuring diameters internal diameters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • G01B11/2408—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures for measuring roundness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes

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  • General Physics & Mathematics (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

The invention provides a tool for measuring the size of a main bearing of a large-diameter tunneling machine, which comprises a distance meter internally provided with a displacement detection module and an angle detection module and a supporting device for supporting the distance meter. The invention also provides a method for measuring the size of the main bearing of the large-diameter tunneling machine, which comprises the following steps: arranging a measuring tool and a measured main bearing on the same horizontal plane at intervals; setting the current detection position as a first detection position A' and recording a first distance value a and a first angle value alpha; moving the measuring tool to a second detection position B' along the circumference of the main bearing to be measured, and recording a second distance value B and a second angle value beta; moving a ranging tool to a third detection position C' along the circumference of the main bearing to be detected, and recording a third distance value C and a third angle value gamma; and calculating the inner diameter, the outer diameter, the ovality or the taper of the main bearing to be measured according to the first distance value a, the second distance value b, the third distance value c, the first angle value alpha, the second angle value beta and the third angle value gamma.

Description

Tool and method for measuring size of main bearing of large-diameter tunneling machine
Technical Field
The invention relates to the technical field of size measurement, in particular to a tool and a method for measuring the size of a main bearing of a large-diameter heading machine.
Background
The main bearing is one of the most critical core parts of the heading machine, and the main bearing can cause long-term shutdown and even rejection of the heading machine once the main bearing fails. The main bearing of the heading machine bears large load, high impact and severe environment in the service process, and the heading machine is inconvenient to shut down and maintain in the operation process, so that the heading machine needs a main bearing with higher quality and more precision.
The inner diameter and the outer diameter of a main bearing of the tunneling machine need to be detected in the production process, and the measurement of the inner diameter and the outer diameter of domestic large parts is usually carried out by adopting a traditional mechanical method, such as a pipe ruler, a large inside micrometer, a large caliper, a pi ruler, an electronic caliper and a coordinate machine; or measuring the circumference of the measured piece by using a roller, and then calculating the diameter and the like. The ovality of the main bearing is generally measured by adopting a pipe ruler at multiple points, and the taper measurement needs to be performed by a meter on a machine tool.
At present, measuring tools such as pipe gauges, micrometers, calipers and the like generally use measuring rod structures, and are easy to bend and deform after being used for a period of time, so that the measuring precision is reduced, and the measuring size is inaccurate; in addition, along with the continuous expansion of the diameter of a measured workpiece, the length and the weight of the measuring rod are continuously increased, the measuring rod is heavy and difficult to lift, so that the measuring difficulty is increased, and the measuring precision is low; in addition, the workpiece needs to be turned over when the ovality of the reverse side of the workpiece is measured. And the adopted pi ruler has low measurement precision and the three-coordinate machine has high price, so a new measurement method needs to be provided for measuring the external dimension of the main bearing.
Disclosure of Invention
The invention aims to provide a tool and a method for measuring the size of a main bearing of a large-diameter heading machine, aiming at the defects of the prior art.
In order to achieve the aim, the invention provides a measuring tool for the size of a main bearing of a large-diameter heading machine, which comprises a distance meter and a supporting device, wherein the distance meter is internally provided with a displacement detection module and an angle detection module;
the supporting device comprises a rotating shaft, a lifting adjusting assembly, supporting legs and cushion blocks; one end of the rotating shaft is connected with the distance measuring instrument, and the other end of the rotating shaft is fixedly connected with one end of the lifting adjusting assembly; the other end of the lifting adjusting component is fixedly connected with one end of the supporting leg so as to be supported by the supporting leg; the lower extreme of landing leg still is equipped with the cushion, and the cushion sets up to the cushion that has high plane degree to guarantee detection device overall structure's plane degree.
Optionally, the legs are provided in at least three pieces.
Optionally, the lifting adjusting assembly is vertically arranged and comprises a fixing rod and a lifting rod, a mounting hole for mounting the lifting rod is formed in the fixing rod, and an internal thread is formed in the mounting hole; be equipped with on the lifter with internal thread assorted external screw thread, the lifter is through the screwed connection with the dead lever, realizes carrying out altitude mixture control for the dead lever.
Optionally, the lifting adjusting assembly further includes a locking member for locking and fixing the fixing rod and the lifting rod to each other.
The invention also provides a method for measuring the size of the main bearing of the large-diameter tunneling machine, which comprises the following steps:
step one, arranging the measuring tool and the measured main bearing on the same horizontal plane at intervals, and arranging the detection position of the distance meter and the surface to be measured of the measured main bearing on the same horizontal position;
step two, starting the distance measuring instrument, setting the current detection position as a first detection position A', and simultaneously recording a first distance value a and a first angle value alpha;
moving the measuring tool to a second detection position B' in a mode of circumferential displacement along the main bearing to be detected, and recording a second distance value B and a second angle value beta detected by the current detection position;
moving the ranging tool to a third detection position C' in a mode of circumferential displacement along the main bearing to be detected, and recording a third distance value C and a third angle value gamma detected by the current detection position;
and step five, calculating the inner diameter, the outer diameter, the ovality or the taper of the main bearing to be measured according to the first distance value a, the second distance value b, the third distance value c, the first angle value alpha, the second angle value beta and the third angle value gamma.
Optionally, the inner diameter or the outer diameter of the measured main bearing is calculated by the following method:
s1.1, taking a distance meter as a 0 point, and establishing a rectangular coordinate system of a first detection position A ', a second detection position B ' and a third detection position C ' as follows: a' (x) 1 ,y 1 )、B'(x 2 ,y 2 )、C'(x 3 ,y 3 ) Wherein: x is the number of 1 ＝a，y 1 ＝0，x 2 ＝b*cosβ，y 2 ＝b*sinβ，x 3 ＝c*cos(β+γ)，y 3 ＝c*sin(β+γ)；
S1.2, according to the general equation of a circle: a x 2 +A*y 2 +B*x+C*y+D＝0，
A＝x 1 (y 2 -y 3 )-y 1 (x 2 -x 3 )+x 2 y 3 -x 3 y 2
B＝(x 1 2 +y 1 2 )(y 3 -y 2 )+(x 2 2 +y 2 2 )(y 1 –y 3 )+(x 3 2 +y 3 2 )(y 2 -y 1 )
C＝(x 1 2 +y 1 2 )(x 2 -x 3 )+(x 2 2 +y 2 2 )(x 3 -x 1 )+(x 3 2 +y 3 2 )(x 1 -x 2 )
D＝(x 1 2 +y 1 2 )(x 3 y 2 -x 2 y 3 )+(x 2 2 +y 2 2 )(x 1 y 3 –x 3 y 1 )+(x 3 2 +y 3 2 )(x 2 y 1 -x 1 y 2 )
Calculating the inner diameter or the outer diameter of the measured main bearing by adopting the following formula:
Figure BDA0003724445670000021
optionally, the ovality of the inner diameter or the outer diameter of the measured main bearing is calculated by the following method:
carrying out multi-point measurement on the detected bearing 1 during the ellipticity measurement, carrying out the same outer diameter measurement in the measurement process, substituting measurement data into a diameter calculation formula to obtain a plurality of diameter values, substituting the maximum diameter value and the minimum diameter value into an ellipticity calculation formula, and determining the ellipticity of the detected bearing 1;
the ellipticity calculation is as follows:
ovality is (D) max -D min )/D Standard of merit 。
Optionally, the taper of the inner diameter or the outer diameter of the measured main bearing is calculated by the following method:
adjusting the whole distance measuring instrument to be flush with the upper end face of the main bearing ring to be measured, emitting laser by the distance measuring instrument, adjusting the height of the laser distance measuring instrument height adjusting device downwards, recording the distance data of the laser distance measuring instrument, recording the displacement data H of the laser distance measuring instrument by the displacement sensor, and obtaining the maximum diameter value D of the detected bearing max And the value D at the minimum diameter min And substituting the maximum diameter value and the minimum diameter value of the detected bearing into a taper calculation formula to determine the external conicity of the detected bearing. The taper measurement formula is as follows:
taper ═ D max -D min )/H。
Compared with the prior art, the invention has the following beneficial effects:
the invention realizes the measurement of different sizes of the main axis to be measured by carrying out multi-point detection on different sizes of the main bearing to be measured according to the requirements of different sizes (outer diameter size, inner diameter size, outer diameter surface taper and the like) of the main bearing to be measured, and the invention is provided with: the measuring rod structure is not needed, deformation influence does not exist, the measuring rod can adapt to measurement of workpieces with larger diameters, the outer diameter, the inner diameter, the ovality and the taper of the main bearing can be measured simultaneously, and the measuring method is simple and convenient to operate.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention is described in further detail below.
Drawings
FIG. 1 is a schematic structural diagram of a detection apparatus according to the present invention.
Wherein:
1.2, a distance measuring instrument, 2, a lifting adjusting component, 2.1, a rotating shaft, 2.2, a lifting adjusting component, 2.3, a supporting leg, 2.4 and a cushion block.
Detailed Description
In order to make the aforementioned objects, features, advantages, and the like of the present invention more clearly understandable, embodiments of the present invention will be described in detail below.
The invention provides a tool for measuring the size of a main bearing of a large-diameter tunneling machine, which comprises a distance meter 1 internally provided with a displacement detection module and an angle detection module and a supporting device 2 for supporting the distance meter 1;
the supporting device 2 comprises a rotating shaft 2.1, a lifting component 2.2, supporting legs 2.3 and cushion blocks 2.4; one end of the rotating shaft 2.1 is connected with the distance measuring instrument 1, and the other end of the rotating shaft is fixedly connected with one end of the lifting adjusting component 2.2; the other end of the lifting adjusting component 2.2 is fixedly connected with one end of the supporting leg 2.3 so as to be supported by the supporting leg 2.3; the lower extreme of landing leg 2.3 still is equipped with cushion 2.4, and cushion 2.4 sets up to the cushion that has high plane degree to guarantee detection device overall structure's plane degree.
Optionally, the legs 2.3 are provided in at least three pieces.
Optionally, the lifting adjusting assembly 2.2 is vertically arranged and comprises a fixing rod and a lifting rod, wherein a mounting hole for mounting the lifting rod is formed in the fixing rod, and an internal thread is formed in the mounting hole; be equipped with on the lifter with internal thread assorted external screw thread, the lifter is through the screwed connection with the dead lever, realizes carrying out altitude mixture control for the dead lever.
Optionally, the lifting adjusting assembly 2.2 further comprises a locking member for locking and fixing the fixing rod and the lifting rod to each other.
The invention also provides a method for measuring the size of the main bearing of the large-diameter tunneling machine, which comprises the following steps:
step one, arranging the measuring tool and a measured main bearing on the same horizontal plane at intervals, and arranging the detection position of a distance meter and the surface to be measured of the measured main bearing on the same horizontal position;
step two, starting the distance measuring instrument, setting the current detection position as a first detection position A', and simultaneously recording a first distance value a and a first angle value alpha;
moving the measuring tool to a second detection position B' in a mode of circumferential displacement along the main bearing to be detected, and recording a second distance value B and a second angle value beta detected by the current detection position;
moving the ranging tool to a third detection position C' in a mode of circumferential displacement along the main bearing to be detected, and recording a third distance value C and a third angle value gamma which are obtained by detection of the current detection position;
and step five, calculating the inner diameter, the outer diameter, the ovality or the taper of the main bearing to be measured according to the first distance value a, the second distance value b, the third distance value c, the first angle value alpha, the second angle value beta and the third angle value gamma.
Optionally, the inner diameter or the outer diameter of the measured main bearing is calculated by the following method:
s1.1, taking a distance meter as a 0 point, and establishing a rectangular coordinate system of a first detection position A ', a second detection position B ' and a third detection position C ' as follows: a' (x) 1 ,y 1 )、B'(x 2 ,y 2 )、C'(x 3 ,y 3 ) Wherein: x is the number of 1 ＝a，y 1 ＝0，x 2 ＝b*cosβ，y 2 ＝b*sinβ，x 3 ＝c*cos(β+γ)，y 3 ＝c*sin(β+γ)；
S1.2, according to the general equation of a circle: a x 2 +A*y 2 +B*x+C*y+D＝0，
A＝x 1 (y 2 -y 3 )-y 1 (x 2 -x 3 )+x 2 y 3 -x 3 y 2
B＝(x 1 2 +y 1 2 )(y 3 -y 2 )+(x 2 2 +y 2 2 )(y 1 –y 3 )+(x 3 2 +y 3 2 )(y 2 -y 1 )
C＝(x 1 2 +y 1 2 )(x 2 -x 3 )+(x 2 2 +y 2 2 )(x 3 -x 1 )+(x 3 2 +y 3 2 )(x 1 -x 2 )
D＝(x 1 2 +y 1 2 )(x 3 y 2 -x 2 y 3 )+(x 2 2 +y 2 2 )(x 1 y 3 –x 3 y 1 )+(x 3 2 +y 3 2 )(x 2 y 1 -x 1 y 2 )
Wherein: A. b, C, D are all calculated parameters.
Optionally, the inner diameter or the outer diameter of the measured main bearing is calculated by using the following formula:
Figure BDA0003724445670000041
optionally, the ovality of the inner diameter or the outer diameter of the measured main bearing is calculated by the following method:
carrying out multi-point measurement on the detected bearing 1 during the ellipticity measurement, carrying out the same outer diameter measurement in the measurement process, substituting measurement data into a diameter calculation formula to obtain a plurality of diameter values, substituting the maximum diameter value and the minimum diameter value into an ellipticity calculation formula, and determining the ellipticity of the detected bearing 1;
the ellipticity calculation is as follows:
ovality is (D) max -D min )/D Standard of merit
Wherein: d Standard of merit The diameter size is required for the design of the bearing to be tested.
Optionally, the taper of the inner diameter or the outer diameter of the measured main bearing is calculated by the following method:
adjusting the whole distance measuring instrument to be flush with the upper end face of the main bearing ring to be measured, emitting laser by the distance measuring instrument, adjusting the height of the laser distance measuring instrument height adjusting device downwards, recording the distance data of the laser distance measuring instrument, recording the displacement data H of the laser distance measuring instrument by the displacement sensor, and obtaining the maximum diameter value D of the detected bearing max And the value D at the minimum diameter min And substituting the maximum diameter value and the minimum diameter value of the detected bearing into a taper calculation formula to determine the external conicity of the detected bearing. The taper measurement formula is as follows:
taper (D) max -D min )/H。
The process of measuring the inner diameter of the detected bearing is specifically described below, and the process of measuring the outer diameter of the detected bearing is similar to the process of measuring the inner diameter of the detected bearing, and the difference is only that the measuring tool is arranged at a position close to the outer diameter of the detected bearing.
Example 1:
the specific measurement process of the inner diameter size of the main bearing of the large-diameter tunneling machine by applying the measurement method of the size of the main bearing of the large-diameter tunneling machine is as follows:
1. will measure the frock and arrange in the position that is close to by the detection bearing internal diameter, rotatory measurement frock measures respectively: the rectangular coordinate systems of a 5m, B7 m, C9 m, β 30 °, γ 40 ° and the three detection positions a ', B ', and C ' are respectively: a' (x) 1 ,y 1 )、B'(x 2 ,y 2 )、C'(x 3 ,y 3 ) Wherein x is 1 ＝5，y 1 ＝0，x 2 ＝4.33，y 2 ＝3.5，x 3 ＝3.08，y 3 ＝8.46；
2. The coordinates of the three detection positions are calculated to be A ' (5,0), B ' (4.33,3.5) and C ' (3.08, 8.46).
3. Let A be x 1 (y 2 -y 3 )-y 1 (x 2 -x 3 )+x 2 y 3 -x 3 y 2 ＝1.05，
B＝(x 1 2 +y 1 2 )(y 3 -y 2 )+(x 2 2 +y 2 2 )(y 1 –y 3 )+(x 3 2 +y 3 2 )(y 2 -y 1 )＝145.45，
C＝(x 1 2 +y 1 2 )(x 2 -x 3 )+(x 2 2 +y 2 2 )(x 3 -x 1 )+(x 3 2 +y 3 2 )(x 1 -x 2 )＝26.04，
D＝(x 1 2 +y 1 2 )(x 3 y 2 -x 2 y 3 )+(x 2 2 +y 2 2 )(x 1 y 3 –x 3 y 1 )+(x 3 2 +y 3 2 )(x 2 y 1 -x 1 y 2 )＝-18.60，
The inner diameter of the detected bearing is calculated by the following formula:
Figure BDA0003724445670000051
example 2:
the specific measurement process of the ovality of the inner diameter of the main bearing of the large-diameter tunneling machine by applying the measurement method of the size of the main bearing of the large-diameter tunneling machine is as follows:
the r1 inner diameter of the detected bearing is obtained according to the steps of the embodiment 1, the steps of the embodiment 1 are repeated, the diameter values of the other three positions are obtained, namely r 2-10.81 m, r 3-10.50 m and r 4-11.70 m, and if the designed standard value of the inner diameter of the detected bearing is 11m, the detected bearing is visitedDetecting ovality of a bearing max -D min )/D Standard of merit Calculated (11.70-10.50)/11 is 0.11.
Example 3:
the specific measurement process of the inner diameter taper of the main bearing of the large-diameter heading machine by applying the method for measuring the size of the main bearing of the large-diameter heading machine is as follows:
the measuring tool is arranged at a position close to the inner diameter of the detected bearing, the measurement is adjusted to be flush with the upper end face of a ferrule of the detected bearing, the distance meter emits laser and downwards adjusts the height of a laser distance meter height adjusting device, the distance data of the laser distance meter is recorded, the displacement data H of the laser distance meter is recorded to be 0.8 through a displacement sensor, and the maximum diameter D of the detected bearing is obtained max 6.2 and minimum diameter D min That is, the taper (D) is obtained max -D min )/H＝0.25。
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A tool for measuring the size of a main bearing of a large-diameter heading machine is characterized by comprising a distance meter (1) internally provided with a displacement detection module and an angle detection module and a supporting device (2) for supporting the distance meter (1);
the supporting device (2) comprises a rotating shaft (2.1), a lifting component (2.2), supporting legs (2.3) and cushion blocks (2.4); one end of the rotating shaft (2.1) is connected with the distance measuring instrument (1), and the other end of the rotating shaft is fixedly connected with one end of the lifting adjusting component (2.2); the other end of the lifting adjusting component (2.2) is fixedly connected with one end of the supporting leg (2.3) so as to be supported by the supporting leg (2.3); the lower extreme of landing leg (2.3) still is equipped with cushion (2.4), and cushion (2.4) set up to the cushion that has high plane degree to guarantee detection device overall structure's plane degree.
2. Measuring tool according to claim 1, characterized in that the leg (2.3) is provided with at least three pieces.
3. The measurement tool according to claim 1, wherein the lifting assembly (2.2) is vertically arranged and comprises a fixed rod and a lifting rod, wherein a mounting hole for mounting the lifting rod is formed in the fixed rod, and an internal thread is formed in the mounting hole; be equipped with on the lifter with internal thread assorted external screw thread, the lifter is through the screwed connection with the dead lever, realizes carrying out altitude mixture control for the dead lever.
4. Measuring tool according to claim 3, characterized in that the lifting assembly (2.2) further comprises a locking member for locking and fixing the fixing rod and the lifting rod to each other.
5. A method for measuring the size of a main bearing of a large-diameter heading machine is characterized by comprising the following steps:
firstly, arranging the measuring tool according to any one of claims 1 to 4 and a measured main bearing on the same horizontal plane at intervals, and arranging a detection position of a distance meter and a surface to be measured of the measured main bearing on the same horizontal position;
step two, starting the distance measuring instrument, setting the current detection position as a first detection position A', and simultaneously recording a first distance value a and a first angle value alpha;
moving the measuring tool to a second detection position B' in a mode of circumferential displacement along the main bearing to be detected, and recording a second distance value B and a second angle value beta detected by the current detection position;
moving the ranging tool to a third detection position C' in a mode of circumferential displacement along the main bearing to be detected, and recording a third distance value C and a third angle value gamma detected by the current detection position;
and step five, calculating the inner diameter, the outer diameter, the ovality or the taper of the main bearing to be measured according to the first distance value a, the second distance value b, the third distance value c, the first angle value alpha, the second angle value beta and the third angle value gamma.
6. A method according to claim 5, wherein the inner or outer diameter of the measured main bearing is calculated by:
s1.1, taking a distance meter as a 0 point, and establishing a rectangular coordinate system of a first detection position A ', a second detection position B ' and a third detection position C ' as follows: a' (x) 1 ,y 1 )、B'(x 2 ,y 2 )、C'(x 3 ,y 3 ) Wherein: x is the number of 1 ＝a，y 1 ＝0，x 2 ＝b*cosβ，y 2 ＝b*sinβ，x 3 ＝c*cos(β+γ)，y 3 ＝c*sin(β+γ)；
S1.2, according to the general equation of a circle: a x 2 +A*y 2 +B*x+C*y+D＝0，
A＝x 1 (y 2 -y 3 )-y 1 (x 2 -x 3 )+x 2 y 3 -x 3 y 2
B＝(x 1 2 +y 1 2 )(y 3 -y 2 )+(x 2 2 +y 2 2 )(y 1 –y 3 )+(x 3 2 +y 3 2 )(y 2 -y 1 )
C＝(x 1 2 +y 1 2 )(x 2 -x 3 )+(x 2 2 +y 2 2 )(x 3 -x 1 )+(x 3 2 +y 3 2 )(x 1 -x 2 )
D＝(x 1 2 +y 1 2 )(x 3 y 2 -x 2 y 3 )+(x 2 2 +y 2 2 )(x 1 y 3 –x 3 y 1 )+(x 3 2 +y 3 2 )(x 2 y 1 -x 1 y 2 )；
Calculating the inner diameter or the outer diameter of the measured main bearing by adopting the following formula:
Figure FDA0003724445660000021
7. a method according to claim 6, wherein the ovality of the measured main bearing bore or outer diameter is calculated by:
carrying out multi-point measurement on the detected bearing 1 during the ellipticity measurement, carrying out the same outer diameter measurement in the measurement process, substituting measurement data into a diameter calculation formula to obtain a plurality of diameter values, substituting the maximum diameter value and the minimum diameter value into an ellipticity calculation formula, and determining the ellipticity of the detected bearing;
the ellipticity calculation is as follows:
ovality is (D) max -D min )/D Standard of merit 。
8. A method according to claim 6, wherein the taper of the measured main bearing bore or outer diameter is calculated by:
adjusting the whole distance measuring instrument to be flush with the upper end face of the main bearing ring to be measured, emitting laser by the distance measuring instrument, adjusting the height of the laser distance measuring instrument height adjusting device downwards, recording the distance data of the laser distance measuring instrument, recording the displacement data H of the laser distance measuring instrument by the displacement sensor, and obtaining the maximum diameter value D of the detected bearing max And the value D at the minimum diameter min And substituting the maximum diameter value and the minimum diameter value of the detected bearing into a taper calculation formula to determine the external conicity of the detected bearing. The taper measurement formula is as follows:
taper ═ D max -D min )/H。
CN202210771779.1A 2022-06-30 2022-06-30 Tool and method for measuring size of main bearing of large-diameter tunneling machine Pending CN114964023A (en)

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