CN100498264C - Vibration measuring device of shedding cam - Google Patents
Vibration measuring device of shedding cam Download PDFInfo
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- CN100498264C CN100498264C CNB2006100858520A CN200610085852A CN100498264C CN 100498264 C CN100498264 C CN 100498264C CN B2006100858520 A CNB2006100858520 A CN B2006100858520A CN 200610085852 A CN200610085852 A CN 200610085852A CN 100498264 C CN100498264 C CN 100498264C
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- shedding cam
- shedding
- accelerometer
- cam
- mounting platform
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Abstract
A vibration measuring device of a shedding cam comprises a mounting platform, the shedding cam which is connected with the mounting platform in a pivot mode, and a servo motor which is arranged on the mounting platform, wherein an output shaft of the servo motor is connected with the shedding cam, a sliding groove is formed in the mounting platform, a pin shaft is slidably arranged in the sliding groove, a roller driven member is coaxially and fixedly connected onto the pin shaft, the axial lead of the roller driven member is parallel to the axial lead of a rotating shaft of the shedding cam, a spring is further arranged in the sliding groove, the spring provides pressing force for the pin shaft, the outer circumferential surface of the roller driven member abuts against the contour surface of the shedding cam, and an accelerometer is arranged on the pin shaft. The roller follower drives the pin shaft to move in the sliding groove along with the change of the radius of the shedding cam, the rotary motion of the shedding cam is converted into the linear motion of the roller follower, and the accelerometer can detect the acceleration change condition reflected by the linear motion.
Description
Technical field
The present invention relates to a kind of device of on the air-jet loom shedding cam vibration situation of shedding mechanism being measured that is used in.
Background technology
In the prior art, shedding mechanism is the poorest physical construction of working condition on the air-jet loom, the elementary model frequency of open loop system is lower than 10 hertz, and about 750 rev/mins of the operating frequency of air-jet loom, the operating frequency of shedding mechanism is about 0.5-0.8 with the ratio of the model frequency of system.The cam shedding mechanism of air-jet loom is a High speed cam driven member mechanism, and shedding cam is the motor of shedding mechanism, if it is insuperior that shedding cam is made, to produce vibration, the vibration transfer of shedding cam is to heald frame, the warp end break of air-jet loom mainly occurs in the heald frame adjacent domain, and heald frame has been given warp thread violent vibration transfer, has aggravated the friction of warp thread in harness eye.The radius precision of shedding cam is 0.005-0.02mm, also lack the means of measuring high precision shedding cam radius at present in the air-jet loom field, so when selecting to use, can't judge accurately whether the shedding cam quality of processing is qualified, the vibrative size of shedding cam can be as the standard of weighing the shedding cam manufacturing accuracy, and the present measuring instrument that also occurs the magnitude of vibrations of measurement shedding cam in the air-jet loom field, the source of trouble that also just can't determine shedding mechanism is a shedding cam, is difficult to find out vibrative reason.
Summary of the invention
The object of the invention provides a kind of vibration measurement device of shedding cam, and it can measure the vibration situation of shedding cam.
Technical scheme of the present invention is: a kind of vibration measurement device of shedding cam, comprise mounting platform, be pivotally connected to the shedding cam on the described mounting platform, be arranged at the servomotor on the described mounting platform, the output shaft of described servomotor is in transmission connection mutually with shedding cam, have sliding tray on the described mounting platform, be mounted slidably bearing pin in the described sliding tray, the coaxial roller follower that is fixedly connected with on the described bearing pin, the axial line of described roller follower parallels with the axial line of the rotating shaft of shedding cam, also be provided with spring in the described sliding tray, described spring provides snap-in force to bearing pin, the external peripheral surface of roller follower and the contour surface of shedding cam are offseted, and described bearing pin is provided with in order to measure the accelerometer of bearing pin acceleration radially.
Described accelerometer is positioned at the top of sliding tray, and the bearing of trend of described accelerometer is along the bearing of trend setting perpendicular to sliding tray.
Described accelerometer sticks on the outside surface of bearing pin.
Described accelerometer is electrically connected with the measuring and calculating unit.
The present invention compared with prior art, have following advantage: roller follower is with the variation of shedding cam radius, driving bearing pin moves in sliding tray, the gyration of shedding cam promptly converts the straight moving of roller follower to, accelerometer may detect the acceleration change situation that this rectilinear motion reflects, because accelerometer just is installed on the vertical direction with sliding tray, so can collect correct signal easily.
1, this measurement mechanism is convenient and practical, and the data of using measuring vibrations are as examination criteria, for the manufacture level that detects shedding cam provides practical method;
2, adopt this measurement mechanism, can study the relation of kinetic stability of the opening follower of the quality of shedding cam and air-jet loom, be suitable for the technological transformation of existing air-jet loom shedding mechanism;
3, judge that by measurement result which type of theoretical curve is best curve, helps selecting the design curve of cam.
Description of drawings
Accompanying drawing 1 is the lifting curve of shedding cam;
Accompanying drawing 2 is the vibration survey curve instance graph of shedding cam;
Accompanying drawing 3 is looked synoptic diagram for structure master of the present invention;
Accompanying drawing 4 is the schematic top plan view of each parts on mounting platform of the present invention and its;
Accompanying drawing 5 is the side vibration measurement device structural representation of shedding cam;
Wherein: 1, servomotor; 2, mounting platform; 3, shedding cam; 4, roller follower; 5, spring; 6, accelerometer; 7, load amplifier; 8, analog to digital converter; 9, measuring and calculating unit; 10, computing machine; 11, bearing pin; 12, sliding tray; 13, accelerometer.
Embodiment
Shown in accompanying drawing 3-accompanying drawing 4, a kind of vibration measurement device of shedding cam, comprise mounting platform 2, be pivotally connected to the shedding cam 3 on the described mounting platform 2, be arranged at the servomotor 1 on the described mounting platform 2, the output shaft of described servomotor 1 is in transmission connection mutually with shedding cam 3 usefulness keys, have sliding tray 12 on the described mounting platform 2, be mounted slidably bearing pin 11 in the described sliding tray 12, the coaxial roller follower 4 that is fixedly connected with on the described bearing pin 11, the axial line of described roller follower 4 parallels with the axial line of the rotating shaft of shedding cam 3, described sliding tray 12 also is provided with spring 5,5 pairs of bearing pins 11 of described spring provide snap-in force, and the external peripheral surface of roller follower 4 and the contour surface of shedding cam 3 are offseted.
Described bearing pin 11 is provided with in order to measure the accelerometer 6 of bearing pin 11 acceleration radially, and described accelerometer 6 is mutually bonding with the external peripheral surface of bearing pin 11.
Described accelerometer 6 is electrically connected with measuring and calculating unit 9, measuring and calculating unit 9 is received on the computing machine 10, between accelerometer 6 and measuring and calculating unit 9, also be connected with load amplifier 7, analog to digital converter 8, the output signal of accelerometer 6 is converted to digital signal behind load amplifier 7 and analog to digital converter 8, digital signal is finally imported in the computing machine 10, the data of the measuring and calculating 9 pairs of collections in unit are carried out signal Processing, and the accelerating curve of correspondence when demonstrating shedding cam 3 revolution on the display screen of computing machine 10.
The characteristics of motion of the shedding cam 3 in the air-jet loom harness motion adopts cosine curve (shown in accompanying drawing 1) or cycloidal curve morely, and the expression formula of curve is as follows:
In the formula:
R
bThe base radius of expression cam;
H represents the lift of cam;
Φ
OCam angle when the lift of expression cam is H.
Cam mechanism on the air-jet loom is the driving mechanism of the whole open loop system of air-jet loom, in order to realize the harness motion of the heald frame on the air-jet loom.Usually air-jet loom is converted into the to-and-fro movement that realizes heald frame from shedding cam 3 and adopts cam swing mechanism, be that shedding cam 3 passes through oscillating follower, motion is passed to heald frame, and the contour vibration curve of measurement shedding cam 3 promptly is the gordian technique of air-jet loom.Accompanying drawing 2 is depicted as the instance graph of the contour vibration measurement curve of shedding cam 3, curve shown in the figure is non-smooth curve, illustrate that measuring curve is full of transient oscillation, curve is that the vibration of various frequencies covers, the motion of shedding cam 3 is pause-rising-pause-decline processes, when pausing the rising conversion, acceleration suddenlys change to zero from maximum deceleration, promptly produce vibration, vibration is ubiquity on each constantly a lot of position of measuring on the curve, this jumping phenomenon is being measured corresponding zone on the curve, and the increase of acceleration sudden change not causing acceleration absolute value is measured curve and static curve and just demonstrated very big different.
The present invention also can measure the side vibration situation of shedding cam 3 when practical application, promptly on the upper side of shedding cam 3, adhere to accelerometer 13, and the output signal of degree of will speed up meter 13 converts digital signal to through load amplifier 7 and analog to digital converter 8, in the digital signal input computing machine 10, carry out signal Processing with the 9 pairs of image data in measuring and calculating unit, when shedding cam 3 revolutions, measure the side vibration state of shedding cam 3 by accelerometer 13, determine the moving state of string of the side of shedding cam 3 from the acceleration information that records, so that further improve designed openings cam 3.
Claims (4)
1, a kind of vibration measurement device of shedding cam, comprise mounting platform (2), be pivotally connected to the shedding cam (3) on the described mounting platform (2), be arranged at the servomotor (1) on the described mounting platform (2), the output shaft of described servomotor (1) is in transmission connection mutually with shedding cam (3), it is characterized in that: have sliding tray (12) on the described mounting platform (2), be mounted slidably bearing pin (11) in the described sliding tray (12), described bearing pin (11) is gone up the coaxial roller follower (4) that is fixedly connected with, the axial line of described roller follower (4) parallels with the axial line of the rotating shaft of shedding cam (3), also be provided with spring (5) in the described sliding tray (12), described spring (5) provides snap-in force to bearing pin (11), the external peripheral surface of roller follower (4) and the contour surface of shedding cam (3) are offseted, and described bearing pin (11) is provided with in order to measure the accelerometer (6) of bearing pin (11) acceleration radially.
2, the vibration measurement device of shedding cam according to claim 1, it is characterized in that: described accelerometer (6) is positioned at the top of sliding tray (12), and the bearing of trend of described accelerometer (6) is along the bearing of trend setting perpendicular to sliding tray (12).
3, the vibration measurement device of shedding cam according to claim 1 is characterized in that: described accelerometer (6) sticks on the outside surface of bearing pin (11).
4, the vibration measurement device of shedding cam according to claim 1 is characterized in that: described accelerometer (6) is electrically connected with measuring and calculating unit (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100858520A CN100498264C (en) | 2006-05-31 | 2006-05-31 | Vibration measuring device of shedding cam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100858520A CN100498264C (en) | 2006-05-31 | 2006-05-31 | Vibration measuring device of shedding cam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1932465A CN1932465A (en) | 2007-03-21 |
| CN100498264C true CN100498264C (en) | 2009-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100858520A Expired - Fee Related CN100498264C (en) | 2006-05-31 | 2006-05-31 | Vibration measuring device of shedding cam |
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| CN (1) | CN100498264C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100545607C (en) * | 2007-04-28 | 2009-09-30 | 江苏万工科技集团有限公司 | Dynamic simulation vibration measuring device of negative cam shedding mechanism |
| DE102008010885A1 (en) * | 2008-02-25 | 2009-08-27 | Krones Ag | Apparatus and method for monitoring the operability of a container treatment apparatus |
| CN101566520B (en) * | 2009-05-13 | 2010-12-01 | 北京航空航天大学 | A vibration and pressure test device suitable for RFID passive tags |
| CN103308270A (en) * | 2013-06-04 | 2013-09-18 | 江苏万工科技集团有限公司 | Measuring method and device thereof for dynamic characteristics of negative open system |
| CN104406787A (en) * | 2014-12-22 | 2015-03-11 | 吴江万工机电设备有限公司 | Device and method for theoretical profile test of cams of negative-type shedding mechanism |
| CN105092224A (en) * | 2015-06-23 | 2015-11-25 | 吴江万工机电设备有限公司 | Test device for shapes of passive type opening cams and manufacture precision |
| CN107084824B (en) * | 2017-03-20 | 2019-06-25 | 上海大学 | A kind of hydraulic fitting vibration testing device |
| CN108098586A (en) * | 2017-12-25 | 2018-06-01 | 重庆市银钢通科技有限公司 | A kind of chatter mark detection method and device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB897720A (en) * | 1957-10-02 | 1962-05-30 | English Electric Co Ltd | Improvements in and relating to mechanical impact and vibration testing machines |
| CN2709966Y (en) * | 2004-07-01 | 2005-07-13 | 苏州东菱振动试验仪器有限公司 | Table braking device of impact test equipment |
| JP2005257630A (en) * | 2004-03-15 | 2005-09-22 | Toyota Motor Corp | Pulsation generator and vibration measurement evaluation system |
-
2006
- 2006-05-31 CN CNB2006100858520A patent/CN100498264C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB897720A (en) * | 1957-10-02 | 1962-05-30 | English Electric Co Ltd | Improvements in and relating to mechanical impact and vibration testing machines |
| JP2005257630A (en) * | 2004-03-15 | 2005-09-22 | Toyota Motor Corp | Pulsation generator and vibration measurement evaluation system |
| CN2709966Y (en) * | 2004-07-01 | 2005-07-13 | 苏州东菱振动试验仪器有限公司 | Table braking device of impact test equipment |
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| CN1932465A (en) | 2007-03-21 |
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Effective date of registration: 20160715 Address after: 215223 Jiangsu Province, Wujiang District of Suzhou City Heng Shan Zhen Wan Ping Road Development Patentee after: Wujiang Wan Gong mechanical & electronic equipment corporation, Ltd Address before: 215223 Wujiang City, Jiangsu province wanpin town Patentee before: Jiangsu Wangong Science and Technology Group Co., Ltd. |
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Granted publication date: 20090610 Termination date: 20210531 |