CN110553571B

CN110553571B - Shafting centering parameter measuring method

Info

Publication number: CN110553571B
Application number: CN201910850031.9A
Authority: CN
Inventors: 率志君; 陈彬; 李玩幽; 王东华; 杜佳鑫; 刘思源; 郭宜斌; 姜晨醒
Original assignee: Harbin Engineering University
Current assignee: Harbin Engineering University
Priority date: 2019-09-10
Filing date: 2019-09-10
Publication date: 2021-03-30
Anticipated expiration: 2039-09-10
Also published as: CN110553571A

Abstract

The invention aims to provide a shafting centering parameter measuring method, which comprises the following steps: (1) a fastening caliper is arranged between the two flange shafts, and a laser displacement sensor is arranged in the vertical groove; (2) mark 4 stations. (3) Measuring the radial distance; (4) measuring the axial spacing distance between the 1# measuring point and the 2# measuring point to be delta 1; measuring the axial spacing distance between the 3# measuring point and the 4# measuring point to be delta 2; (5) and calculating the parallel misalignment amount of the two flange shafts at the current position. (6) And calculating the misalignment amount theta p1 of the two flange shaft angles at the current position. (7) Assuming that the current position is 0 deg., one measurement position is taken every 90 deg. in the circumferential direction 360 deg., steps 3-6 are repeated, and Hp1, θ p1, respectively, are recorded. And determining a parallel misalignment amount Hp and an angle misalignment amount theta p. When the shafting does not have the turning condition, the parallel misalignment amount and the angle misalignment amount of the shafting can be accurately measured by a simple measuring device, and reliable adjusting parameters are provided for shafting centering.

Description

Shafting centering parameter measuring method

Technical Field

The invention relates to a ship propulsion shafting alignment method.

Background

In engineering application, the misalignment of the shaft system is high in fault ratio, and a large part of misalignment of the shaft system is introduced in the installation process. Therefore, before the shafting is in service, shafting centering needs to be carried out, and the misalignment of the shafting is reduced as far as possible. At present, shafting centering mainly comprises two modes, one mode is static centering, and the other mode is dynamic centering. The dynamic centering can guarantee the actual effect of centering more accurately, but before dynamic centering, a shaft system needs to be guaranteed to be in a centering state which can not damage the shaft system when running in a short time, and in practical engineering application, the shaft system cannot directly reach the centering state after being hoisted. Therefore, the shafting needs to be statically centered before being dynamically centered.

When static centering is carried out on the misalignment amount of a measurement shafting flange, a measurement device needs to be fixed on one end flange, and then the other end flange is rotated through a barring structure to complete measurement (patent 'a tool for shafting centering measurement'. Pub. No. CN 20381111U). However, in the engineering, some shafting with finished hoisting has no turning condition or no turning mechanism at all. This makes the centering operation not smoothly completed.

Disclosure of Invention

The invention aims to provide a method for measuring a shaft system centering parameter in shaft system calibration when a shaft system does not have a barring condition.

The purpose of the invention is realized as follows:

the invention relates to a method for measuring an axis centering parameter, which is characterized by comprising the following steps:

(1) screwing bolts into the fastening bolt mounting holes at the two ends of the fastening caliper to mount the fastening caliper above the two flange shafts, and assuming that the position is a 0-degree mounting position of the fastening caliper;

(2) mark 4 stations: one side of the flange A with the shaft is the outer side of the flange A, and the side without the shaft is the inner side of the flange A; one side of the flange B with the shaft is the outer side of the flange B, and the side without the shaft is the inner side of the flange B; the marked 1# measuring point-marked 4# measuring point are all located in a vertical groove of the fastening caliper, the distance from the marked 1# measuring point to the outer side of the flange A is W1, the distance from the marked 2# measuring point to the inner side of the flange A is W2, the distance from the marked 3# measuring point to the inner side of the flange B is W3, and the distance from the marked 4# measuring point to the outer side of the flange B is W4;

(3) measuring the radial distance: installing a laser displacement sensor at a position corresponding to the No. 1 measuring point in the vertical groove of the fastening caliper, acquiring the radial distance from the laser displacement sensor to the arc surface of the flange, connecting the output signal end of the laser displacement sensor into a data acquisition instrument, and recording the reading H1 of the displacement sensor at the moment; then moving and installing the laser displacement sensors at measuring points 2#, 3#, and 4# in sequence, and recording readings H2, H3, and H4 respectively;

(4) measuring the axial spacing distance between the measuring points: measuring the axial spacing distance between the 1# measuring point and the 2# measuring point to be delta 1; measuring the axial spacing distance between the 3# measuring point and the 4# measuring point to be delta 2;

(5) calculating the parallel misalignment of two flange shafts at the current position: taking the radial distance H1 of the measuring point # 1 as a reference value, the parallel misalignment amount is Hp 1-H3-H1;

(6) calculating the misalignment amount theta p1 of two flange shaft angles at the current position: taking the radial distance H1 of the measuring point # 1 as a reference value, the angle difference θ p1 is (arctan (| H1-H2|) + arctan (| H3-H4|)) 180/3.14;

(7) at this moment, the parallel misalignment and the angle misalignment of the current position are calculated, then the position of the tight caliper is respectively adjusted to 90 degrees, 180 degrees and 270 degrees along the circumferential direction of the flange, the steps 3-6 are repeated, and Hp1 and theta p1 calculated at each position are respectively recorded;

(8) determining a parallel misalignment Hp, an angle misalignment theta p: calculating a parallel misalignment amount Hp ═ max (Hp1) -min (Hp1))/2 from the data measured in steps 3-7; the angle misalignment amount θ p becomes max (θ p 1).

The invention has the advantages that: the method is an effective supplement of the traditional static centering method, and can accurately measure the parallel misalignment amount and the angle misalignment amount of the shafting through a simple measuring device when the shafting does not have the barring condition, so as to provide reliable adjusting parameters for shafting centering.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2a is a horizontal axis, fig. 2b is a top view, fig. 2c is a front view and fig. 2d is a side view of the sizing caliper.

Detailed Description

The invention will now be described in more detail by way of example with reference to the accompanying drawings in which:

with reference to fig. 1-2, an embodiment of the present invention includes the following steps:

step 1, according to a schematic diagram of the shafting misalignment measurement test in fig. 1, bolts are screwed in through fastening bolt mounting holes at two ends of the fastening caliper, so that the fastening caliper is mounted right above two

flange shafts

2 and 3, and the position is assumed to be a mounting position of the fastening caliper at 0 degree.

And 2, marking 4

measuring points

8, 9, 10 and 11. According to the scheme shown in the attached figure 1, the shaft side of the flange A1 is the outer side of the flange A1, and the shaft-free side is the inner side of the flange A1; similarly, the shaft side of the flange B4 is the outer side of the flange B4, and the shaft-free side is the inner side of the flange B4; the distance from a mark 1# measuring point 8 to the outer side of a flange A1 is W1, the distance from a mark 2# measuring point 9 to the inner side of a flange A1 is W2, the distance from a mark 3# measuring point 10 to the inner side of a flange B4 is W3, and the distance from a mark 4# measuring point 11 to the outer side of a flange B4 is W4;

and 3, measuring the radial distance. Installing a laser displacement sensor at a position corresponding to the 1# measuring point 8 in the vertical groove 7 of the fastening caliper, connecting an output signal end of the laser displacement sensor into the data acquisition instrument 12, and recording the reading H1 of the displacement sensor at the moment; then sequentially moving and installing the laser displacement sensors at

measuring points

9, 10 and 11 of No. 2, No. 3 and No. 4, and respectively recording readings H2, H3 and H4;

and 4, measuring the axial spacing distance between the measuring points. Taking the left end face of the fastening caliper as a reference surface, measuring the distance from the center line of the measuring point 8 # to the reference surface as D1, measuring the distance from the center line of the measuring point 9 # to the reference surface as D2, measuring the distance from the center line of the measuring point 10 # to the reference surface as D3, and measuring the distance from the center line of the measuring point 11 # to the reference surface as D4; then, the axial spacing distance between point # 1, point 8, and point # 2, point 9 is Δ 1 — D2-D1; measuring the axial spacing distance between the measuring point No. 3 10 and the measuring point No. 4 11 as D4-D3;

and 5, calculating the parallel misalignment amount of the two flange shafts at the current position. Taking the radial distance H1 of the 1# measuring point 8 as a reference value, the parallel misalignment amount is Hp 1-H3-H1;

and 6, calculating the misalignment amount theta p1 of the angles of the two

flange shafts

2 and 3 at the current position. Taking the radial distance H1 of the 1# measuring point 8 as a reference value, the angle neutral amount theta p1 is (arctan (delta 1/| H1-H2|) + arctan (delta 2/| H3-H4|)) 180/3.14;

and 7, completing the calculation of the parallel misalignment and the angle misalignment of the current position, then respectively adjusting the position of the tightening caliper to 90 degrees, 180 degrees and 270 degrees along the circumferential direction of the flange, repeating the steps 3-6, and respectively recording Hp1 and theta p1 obtained at each position.

And 8, determining the parallel misalignment Hp and the angle misalignment theta p. Calculating a parallel misalignment amount Hp ═ max (Hp1) -min (Hp1))/2 from the data measured in steps 3-7; the angle misalignment amount θ p becomes max (θ p 1).

Claims

1. A shafting centering parameter measuring method is characterized in that:

(8) determining a parallel misalignment Hp, an angle misalignment theta p: calculating a parallel misalignment amount Hp ═ max (Hp1) -min (Hp1))/2 from the data measured in steps 3-7; the angle misalignment amount θ p becomes max (θ p 1); max () is a take maximum function and min () is a take minimum function.