CN107132019B - A kind of experiment coke pushing kinetic stability research device and research method - Google Patents
A kind of experiment coke pushing kinetic stability research device and research method Download PDFInfo
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- CN107132019B CN107132019B CN201710193580.4A CN201710193580A CN107132019B CN 107132019 B CN107132019 B CN 107132019B CN 201710193580 A CN201710193580 A CN 201710193580A CN 107132019 B CN107132019 B CN 107132019B
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- piston shoes
- pushing
- pushing ram
- coke
- fastening screw
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/06—Multidirectional test stands
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
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Abstract
The present invention relates to experiment coke oven coke-pusher device field, specifically a kind of experiment coke pushing kinetic stability research device and research method.The present apparatus includes: pedestal, braced frame, rear support roller, pinion stand, driving gear, pushing ram, coke pushing head, bolt group, piston shoes top, piston shoes middle part, piston shoes bottom, pad brick, front support roller.Power source is driving gear, provides power by the rack gear of pushing ram upper surface for pushing ram.The mountable acceleration transducer in pushing ram tail portion simultaneously connects data collection system.Coke pusher piston shoes part by it is upper, in, bottom three parts constitute, can control respectively piston shoes turn about the X axis, around Y-axis rotation, move along Z-direction and piston shoes bottom and the inclination angle of horizontal plane etc..This coke pushing stability study device can realize the research to the stable all multivariables of coke pushing are influenced in laboratory conditions, provide experiment condition support for pushing ram structural stability and Vibration Damping Technology Study, support to instruct pushing ram structural improvement to provide experiment.
Description
Technical field
The present invention relates to experiment coke oven coke-pusher device field, specifically a kind of experiment is ground with coke pushing kinetic stability
Study carefully device and research method.
Technical background
At present coke production mostly use for first by coal send to carbonizing chamber air-isolation heat 20 to 30 hours after again by coke pushing
The production method that machine is released and collected.Wherein when pushing coke, the major part of ram puts in carbonizing chamber, after completion coke pushing again
Reversely withdraw from.In this process, ram not only results in briquette along with violent vibration and noise, long-term mechanical oscillation
Collapsing influences coke quality, more causes fatigue rupture to mechanical equipment itself, influences the service life and work of entire coke pusher
Make reliability.It is badly in need of the special ram for experimental study to solve this problem to complete accordingly to test, finds simultaneously
Vibration cause is further solved, safety in production hidden danger is solved.Patent document is consulted, it is related to the present invention to have: Authorization Notice No.
CN202099241U, entitled " ram applied to testing coke oven " and Authorization Notice No. CN202099242U, entitled " examination
It tests coke oven and is coaling with coke pushing and make all-in-one machine firm by ramming ".But both rams both for 200KG or more large-scale experiment Coke-oven Design simultaneously
And only it is capable of measuring the curent change situation in work.In addition Authorization Notice No. CN102838998A, it is entitled " to open the door real in the side 40kg
Test coke oven coke-pusher machine " for testing the coke pushing current and coke pushing resistance of ram.There is not yet being used in current patent document
The experiment ram of pushing ram structural research.
Summary of the invention
The purpose of the present invention is overcoming the prior art to be not easy to be studied under operating conditions, mechanical structure change it is difficult,
The high predicament of research cost.It proposes a kind of for studying ram different structure under laboratory environment to coke pushing kinetic stability
The device and research method of influence.
A kind of experiment coke pushing kinetic stability research device, including pedestal, braced frame, rear support roller, pinion stand, drive
Moving gear, pushing ram, coke pushing head, bolt group, piston shoes top, piston shoes middle part, piston shoes bottom, pad brick and front support roller;It takes described
Pedestal is put in horizontal table top, and two braced frames are inserted into card slot on it, props up after braced frame top two sides are installed respectively
Roller and pinion stand are supportted, installation driving gear, successively installs front support at the front position of braced frame on pedestal on pinion stand
Roller and pad brick, are connected using interior exterior bayonet slot between above structure.The pushing ram head, which passes through, is welded to connect coke pushing head, pushing ram
Body of rod bottom surface is supported on rear support roller and front support roller, and body of rod top surface and driving Gear Contact, the middle part of pushing ram is equipped with square
Connected in star is attached between pushing ram and piston shoes top by bolt group, pushing ram and bolt group for being inserted into piston shoes top
Contact portion or so be respectively provided with two U-shaped through-holes in longitudinal direction, pass through the opposite position for changing bolt group on pushing ram in U-shaped through-hole
It sets and changes piston shoes to the bearing height of pushing ram, spiral shell is reinforced using annular knurl technique in the outer surface that wherein pushing ram is contacted with bolt group
The frictional force of bolt group.The lower section on the piston shoes top is equipped with cylindrical hole for being inserted into cylindrical body, piston shoes top and piston shoes middle part
Between be attached by cylindrical body, possess a rotational freedom between the two, can be (vertical with piston shoes bottom around Y direction
Direction) it relatively rotates, -45 ° of slewing area ~ 45 °, the first fastening is additionally provided in the middle part of piston shoes and at the coupling part on piston shoes top
Screw adjusts the damped coefficient for screwing degree and the revolute pair being adjusted of the first fastening screw;If screwing the first fastening spiral shell completely
Nail, then cannot rotate relative to each other between piston shoes top and piston shoes middle part and (rotate around Y-axis), forms rigid connection;If on piston shoes top
The first fastening screw is screwed after keeping a special angle between piston shoes middle part, then can make to keep specific angle between piston shoes bottom and pad brick
It spends, the region above the cylindrical hole on piston shoes top uses annular knurl technique, to increase the frictional force between the first fastening screw.
Lower section in the middle part of piston shoes is placed in the piston shoes bottom on pad brick by cylindrical pair connection, has special matched cylinder on piston shoes bottom
Slot, when assembly, are first put into the middle part of piston shoes, after screw front and rear cover.The second fastening screw on piston shoes bottom is for controlling revolute pair
Work.Wherein when the second fastening screw is tightened, (turned about the X axis, with piston shoes bottom with piston shoes bottom without relative rotation in the middle part of piston shoes
The parallel direction in portion), form rigid connection;When the second fastening screw is unscrewed, in the middle part of piston shoes and piston shoes bottom exists around X-direction
Revolute pair, can be relatively rotated.It is respectively equipped with load space before and after the piston shoes bottom, may be selected to put in load space
Set the mass block of different quality.In the case where not locked first fastening screw, pass through different quality in the load space of front and back
Proportion, may be implemented the state of piston shoes bottom front-rear direction (X-direction): lean forward, horizontal, hypsokinesis.In addition it is set on piston shoes bottom
There is the cover sheet for protecting that mass block is not run out in load space.
The tail end of a kind of above-mentioned experiment coke pushing kinetic stability research device, the pushing ram is equipped with card slot, can root
A section pushing ram is installed additional according to situation to extend whole coke pushing pole length.
A kind of research method of above-mentioned experiment coke pushing kinetic stability research device, comprising the following steps:
Step 1: correctly building experimental provision as required, and release bolt group is twisted when piston shoes bottom is exactly in contact with pad brick
Tight bolt group;
Step 2: connecting stepper motor for driving gear, installs acceleration transducer in the tail portion of pushing ram, passes through data
Capture card is connected to computer, carries out vibrating data collection;
Step 3: screwing the first fastening screw, the second fastening screw, and piston shoes part is rigid connection at this time, opens motor
Simulation coke pushing is completed, motor reversal pushing ram is recalled, this group of data acquisition is completed;
Step 4: keeping experimental provision motionless, unscrew the first fastening screw, and piston shoes are achievable at this time rotates around Y-axis, opens
Motor completes coke pushing, retracts movement, records experimental data;
Step 5: it keeps experimental provision motionless, unscrews the second fastening screw, piston shoes can be achieved at the same time into around X-axis, Y at this time
The rotation of axis opens motor and completes coke pushing, retracts movement, records experimental data;
Step 6: keeping experimental provision motionless, tighten the first fastening screw, and piston shoes are achievable at this time turns about the X axis, and opens
Motor completes coke pushing, retracts movement, records experimental data;
Step 7: keeping experimental provision motionless, adjusts the first fastening screw, so that piston shoes is disturbed Y-axis and rotates in underdamping, by force
The second fastening screw is tightened or unscrewed to damping state, does orthogonal test, records experimental data;
Step 8: the mass block of different quality is placed before and after the piston shoes bottom in load space, tilts piston shoes, constantly
Change front and back counterweight and repeats Step 5: six, seven;
Step 9: adjusting bolt group, increase or decrease the bearing height of piston shoes, makes pushing ram weight in flexible deformation
Multiple above-mentioned steps three to eight;
Step 10: restoring experimental bench after completing all steps, completes this experimental implementation, carries out vibration signal in computer
Data processing, compare different experiments group, analyze influence of the piston shoes support construction to pushing ram kinetic stability.
Compared with prior art, the beneficial effects of the present invention are:
1. the present invention reduces and simplifies ram, while remaining the primary structure and working method of practical ram,
Convenient for studying in laboratory environments ram vibrational state.
2. the present invention is to structure change has been carried out at pushing ram support piston shoes, for studying piston shoes support construction to pushing ram
The influence of kinetic stability.The piston shoes can be adjusted in multiple dimensions, while control multiple groups freedom degree.The present invention can not only be ground
Study carefully influence of each auxiliary connection to coke pusher stability of vibration on piston shoes, it can also be used to study different factors to device mass motion
The coupling of stability.
Detailed description of the invention
Fig. 1 is axonometric drawing of the invention.
Fig. 2 is front view of the invention.
Fig. 3 is pushing ram structure chart.
Fig. 4 is the section amplification figure for prolonging A ~ A line in Fig. 3.
Fig. 5 is the front view of piston shoes part.
Fig. 6 is the left view of piston shoes part.
Fig. 7 is piston shoes middle part, bottom substance schematic diagram.
In figure: 1- pedestal;2- braced frame;3- rear support roller;4- pinion stand;5- drives gear;6- pushing ram;7- coke pushing
Head;8- bolt group;9- piston shoes top;9-1- piston shoes upper body;The first fastening screw of 9-2-;9-3- cylindrical body;10- piston shoes
Middle part;11- piston shoes bottom;The second fastening screw of 11-1-;11-2- end cap;11-3- cover sheet;11-4- piston shoes bottom section body;
12- pads brick;13- front support roller.
Specific embodiment
Present invention is further described in detail with specific embodiment with reference to the accompanying drawing.
As shown in Figure 1 and 2, main support part of the invention is the braced frame 2 and front support roller 13 of plate.First take out
Pedestal 1 installs braced frame 2 and front support roller 13 in corresponding installation card slot on it respectively, keeps two after the installation is completed
Support frame frame 2 is parallel, installs rear support roller 3 and pinion stand 4 on it.Installation driving gear 5, will drive gear on pinion stand 4
Connect stepper motor.
As shown in figure 3, pushing ram 6 is front and back unsymmetric structure, wherein being front end close to the part of U-shaped through-hole.By coke pushing
First 7 by being welded to connect on pushing ram 6.The tail portion of pushing ram 6 is equipped with card slot, surveys if you need to carry out long range coke pushing stability
Examination, can connect same pushing ram in its tail portion groove position to increase the length of coke pushing, and there is rack gear in pushing ram upper surface, driving
Gear 5 provides power by rack and pinion engagement, to pushing ram.
As shown in Fig. 5 ~ 7, the piston shoes of the present apparatus share three parts composition, respectively piston shoes top 9, piston shoes middle part 10 and cunning
Sole portion 11.Piston shoes middle part 10 and piston shoes bottom 11 are taken, by 10 bottom column part alignment piston shoes bottom 11 in the middle part of piston shoes
In cylinder groove, install and fix front and rear cover 11-2, complete in the middle part of piston shoes the fixation of 10 and piston shoes bottom 11, at this time between the two without
Relative displacement can only carry out the rotation for disturbing X-axis.Second fastening screw 11-1 and cover sheet 11-3 is installed.
It takes 10 in the middle part of piston shoes top 9 and piston shoes, is inserted into cylindrical body 9-3 after being aligned cylindrical hole, adjusts piston shoes top 9 and piston shoes
The first fastening screw 9-2 is locked after the angle at middle part 10.
Pad brick 12 is placed as shown in Figure 1, piston shoes bottom 11 is placed in 12 top of pad brick, the insertion of piston shoes top 9 at this time pushes away
In the corresponding rectangular channel of burnt bar 6, adjustment pushing ram 6 to suitable height is inserted into and tightens bolt group 8, fixed pushing ram 6 and piston shoes
Top 9.
Experiment porch, which is built, to be finished, and is installed acceleration transducer in the tail end of pushing ram 6 and is connected data collection system, beats
Motor-driven gear is opened, starts to test.
The above-mentioned only present invention preferably feasible embodiment, the non-therefore limitation scope of the present invention, according to above-described embodiment
Done various modifications are applied within this technical solution protection scope.
A kind of experiment research method of coke pushing kinetic stability research device, comprising the following steps:
Step 1: correctly building experimental provision as required, and release bolt group is twisted when piston shoes bottom is exactly in contact with pad brick
Tight bolt group;
Step 2: connecting stepper motor for driving gear, installs acceleration transducer in the tail portion of pushing ram, passes through data
Capture card is connected to computer, carries out vibrating data collection;
Step 3: screwing the first fastening screw, the second fastening screw, and piston shoes part is rigid connection at this time, opens motor
Simulation coke pushing is completed, motor reversal pushing ram is recalled, this group of data acquisition is completed;
Step 4: keeping experimental provision motionless, unscrew the first fastening screw, and piston shoes are achievable at this time rotates around Y-axis, opens
Motor completes coke pushing, retracts movement, records experimental data;
Step 5: it keeps experimental provision motionless, unscrews the second fastening screw, piston shoes can be achieved at the same time into around X-axis, Y at this time
The rotation of axis opens motor and completes coke pushing, retracts movement, records experimental data;
Step 6: keeping experimental provision motionless, tighten the first fastening screw, and piston shoes are achievable at this time turns about the X axis, and opens
Motor completes coke pushing, retracts movement, records experimental data;
Step 7: keeping experimental provision motionless, adjusts the first fastening screw, so that piston shoes is disturbed Y-axis and rotates in underdamping, by force
The second fastening screw is tightened or unscrewed to damping state, does orthogonal test, records experimental data;
Step 8: the mass block of different quality is placed before and after the piston shoes bottom in load space, tilts piston shoes, constantly
Change front and back counterweight and repeats Step 5: six, seven;
Step 9: adjusting bolt group, increase or decrease the bearing height of piston shoes, makes pushing ram weight in flexible deformation
Multiple above-mentioned steps three to eight;
Step 10: restoring experimental bench after completing all steps, completes this experimental implementation, carries out vibration signal in computer
Data processing, compare different experiments group, analyze influence of the piston shoes support construction to pushing ram kinetic stability.
Claims (3)
1. a kind of experiment coke pushing kinetic stability research device, it is characterised in that including pedestal (1), braced frame (2), rear branch
Support roller (3), pinion stand (4), driving gear (5), pushing ram (6), coke pushing head (7), bolt group (8), piston shoes top (9), piston shoes
Middle part (10), piston shoes bottom (11), pad brick (12) and front support roller (13), pedestal (1) are equipped with braced frame (2), are supporting
Frame (2) top two sides are installed by rear support roller (3) and pinion stand (4), installation driving gear (5) on pinion stand (4), the bottom of at respectively
Front support roller (13) and pad brick (12), pushing ram (6) head are successively installed at the front position of braced frame (2) on seat (1)
Portion connects coke pushing head (7), and the body of rod bottom surface of pushing ram (6) is supported on rear support roller (3) and front support roller (13), body of rod top surface
With driving gear (5) contact, the middle part of pushing ram (6) is equipped with groove and is used to be inserted into piston shoes top (9), pushing ram (6) and piston shoes
It is attached between top (9) by bolt group (8), the contact portion or so of pushing ram (6) and bolt group (8) is respectively provided with two
Longitudinal U-shaped through-hole changes piston shoes to pushing ram by changing the relative position of bolt group (8) on pushing ram (6) in U-shaped through-hole
Bearing height, the outer surface that pushing ram (6) is contacted with bolt group (8) use annular knurl technique strengthening stud group (8) frictional force,
The lower section on piston shoes top (9) is equipped with cylindrical hole for being inserted into cylindrical body (9-3), piston shoes top (9) and piston shoes middle part (10) it
Between be attached by cylindrical body (9-3), be additionally provided with first tightly at the coupling part of (10) and piston shoes top (9) in the middle part of piston shoes
Gu screw (9-2), the region above the cylindrical hole of piston shoes top (9) uses annular knurl technique, to increase and the first fastening screw
Frictional force between (9-2), the lower section at piston shoes middle part (10) are placed in the piston shoes bottom on pad brick (12) by cylindrical pair connection
(11), there are cylinder groove matched with cylindrical pair and end cap (11-2) on piston shoes bottom (11), it is tight that end cap (11-2) is equipped with second
Gu screw (11-1) is respectively equipped with load space before and after piston shoes bottom (11), may be selected to place different quality in load space
Mass block, the cover sheet (11-3) for protecting that mass block is not run out in load space is additionally provided on piston shoes bottom (11).
2. a kind of experiment coke pushing kinetic stability research device according to claim 1, it is characterised in that the coke pushing
The tail end of bar (6) is equipped with card slot, can install a section pushing ram (6) additional according to circumstances to extend whole coke pushing pole length.
3. a kind of a kind of research method of experiment coke pushing kinetic stability research device as described in claim 1, feature
Be the following steps are included:
Step 1: correctly building experimental provision as required, and release bolt group (8) is exactly in contact with pad brick to piston shoes bottom (11)
(12) when, bolt group (8) are tightened;
Step 2: connecting stepper motor for driving gear (5), installs acceleration transducer in the tail portion of pushing ram (6), passes through number
It is connected to computer according to capture card, carries out vibrating data collection;
Step 3: screwing the first fastening screw (9-2), the second fastening screw (11-1), and piston shoes part is rigid connection at this time, beats
It opens motor and completes simulation coke pushing, motor reversal pushing ram is recalled, this group of data acquisition is completed;
Step 4: keeping experimental provision motionless, unscrew the first fastening screw (9-2), and piston shoes are achievable at this time rotates around Y-axis, beats
It opens motor to complete coke pushing, retract movement, records experimental data;
Step 5: keep experimental provision it is motionless, unscrew the second fastening screw (11-1), at this time piston shoes can be achieved at the same time into around X-axis,
The rotation of Y-axis opens motor and completes coke pushing, retracts movement, records experimental data;
Step 6: it keeps experimental provision motionless, tightens the first fastening screw (9-2), piston shoes are achievable at this time turns about the X axis, and beats
It opens motor to complete coke pushing, retract movement, records experimental data;
Step 7: keep experimental provision it is motionless, adjust the first fastening screw (9-2), make system disturb Y-axis rotation in underdamping,
Heavy damping state is tightened or is unscrewed the second fastening screw (11-1), and orthogonal test is done, and records experimental data;
Step 8: the mass block of different quality is placed in load space before and after piston shoes bottom (11), tilts piston shoes, constantly
Change front and back counterweight and repeats Step 5: six, seven;
Step 9: adjusting bolt group (8), increase or decrease the bearing height of piston shoes, makes pushing ram weight in flexible deformation
Multiple above-mentioned steps three to eight;
Step 10: restoring experimental bench after completing all steps, completes this experimental implementation, carries out the number of vibration signal in computer
According to processing, different experiments group is compared, analyzes influence of the piston shoes support construction to pushing ram kinetic stability.
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1342740A (en) * | 2001-10-12 | 2002-04-03 | 太原理工大学 | Monitoring management system for coke pushing procedure |
JP2015131899A (en) * | 2014-01-10 | 2015-07-23 | 新日鐵住金株式会社 | Furnace width measuring device and coke pusher |
CN205368242U (en) * | 2016-02-17 | 2016-07-06 | 宣化钢铁集团有限责任公司 | Coke pushing crawler shoe device of coke pusher |
CN205740881U (en) * | 2016-06-08 | 2016-11-30 | 浙江福特机械制造有限公司 | Testing coke oven coal charging coke pusher |
-
2017
- 2017-03-28 CN CN201710193580.4A patent/CN107132019B/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1342740A (en) * | 2001-10-12 | 2002-04-03 | 太原理工大学 | Monitoring management system for coke pushing procedure |
JP2015131899A (en) * | 2014-01-10 | 2015-07-23 | 新日鐵住金株式会社 | Furnace width measuring device and coke pusher |
CN205368242U (en) * | 2016-02-17 | 2016-07-06 | 宣化钢铁集团有限责任公司 | Coke pushing crawler shoe device of coke pusher |
CN205740881U (en) * | 2016-06-08 | 2016-11-30 | 浙江福特机械制造有限公司 | Testing coke oven coal charging coke pusher |
Non-Patent Citations (1)
Title |
---|
SCP机推焦杆推焦受力分析及结构优化;乔海洋;《燃料与化工》;20170131;第48卷(第1期);第21-25页 * |
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