CN116952567A - Fatigue test device and method for power closed gear rack - Google Patents
Fatigue test device and method for power closed gear rack Download PDFInfo
- Publication number
- CN116952567A CN116952567A CN202311077243.0A CN202311077243A CN116952567A CN 116952567 A CN116952567 A CN 116952567A CN 202311077243 A CN202311077243 A CN 202311077243A CN 116952567 A CN116952567 A CN 116952567A
- Authority
- CN
- China
- Prior art keywords
- load
- rack
- shaft
- driving
- gear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009661 fatigue test Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 10
- 229910001018 Cast iron Inorganic materials 0.000 claims abstract description 25
- 238000012360 testing method Methods 0.000 claims abstract description 14
- 238000010998 test method Methods 0.000 claims abstract description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 32
- 230000008569 process Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000002474 experimental method Methods 0.000 claims description 3
- 230000033001 locomotion Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000013441 quality evaluation Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/021—Gearings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/023—Power-transmitting endless elements, e.g. belts or chains
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention discloses a power closed gear rack fatigue test device and a test method thereof, wherein the test device comprises a cast iron platform; a guide rail sliding block module is arranged on the cast iron platform; a rack is movably arranged on the guide rail sliding block module; the rack is respectively meshed with the load gear and the driving gear; the load gear and the driving gear are respectively arranged on the load shaft and the driving shaft; the load shaft and the driving shaft are respectively connected with the load assembly and the driving assembly; the load assembly and the driving assembly are connected with a common direct current bus, and the load assembly and the driving assembly are fixed on a cast iron platform; the load assembly and the drive assembly are controlled by a control system. The power closed gear rack fatigue test device and the method can accurately realize the reciprocating motion of the gear rack, visually reflect the fatigue wear condition of the gear rack, provide adjustable load torque and dragging rotating speed, and can autonomously set the operation condition of the gear rack; the degree of automation is high, and the repeatability of test data is good.
Description
Technical Field
The invention belongs to the technical field of mechanical engineering, and particularly relates to a power closed gear rack fatigue test device and a test method thereof.
Background
The gear rack is widely applied to various numerical control machine tools, milling machines, drilling machines, lathes, cutting machines and the like, has the advantages of large bearing capacity, high precision, large load, infinite splicing, high-speed operation, stable operation, high transmission precision, high transmission efficiency, accurate transmission ratio, large power range, large torque transmission, low noise, long service life and the like, and is suitable for quick and accurate positioning structures and heavy load, high precision, high rigidity, high speed, long stroke occasions. Has wide application range and good development prospect.
The main parts and components of aircraft, ships, automobiles, power machines, engineering machines, metallurgy, petroleum and other machines, railroad bridges and the like mostly work under cyclically varying loads, and fatigue is a main failure mode thereof. Some parts and components operate above or below room temperature, or operate in corrosive media, or are loaded in a manner such as not pulling, pressing and bending, but contact rolling, etc., and different environmental factors can cause different fatigue damages to the parts and components. The most common are contact fatigue, high temperature fatigue, thermal fatigue, corrosion fatigue, fretting fatigue, and the like. The fatigue problem has become one of the urgent problems in engineering applications.
The operation working conditions of the gear rack mostly have high acceleration reciprocating motion, contact stress also changes periodically, fatigue failure is more easy to generate, but research on the gear rack at home and abroad mostly only has a gear rack mechanism integrated in various mechanical equipment, only the stability and the applicability of the gear rack to the whole mechanical equipment are explored, and corresponding performance test and quality evaluation are not carried out on the gear rack independently. The research and development of the fatigue equipment for the gear rack is helpful for more clearly revealing the fatigue failure process and the generation mechanism of the gear rack, evaluating the performances of new materials and new processes for the gear rack, and avoiding the fatigue failure phenomenon of the gear rack in advance in future application. The safety and the reliability of the application of the gear rack mechanism are improved, and the gear rack mechanism has very important practical significance and engineering application value.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a power closed gear rack fatigue test device and a test method thereof, so as to solve the problem that the prior art does not independently perform corresponding performance test and quality evaluation on a gear rack.
In order to achieve the above purpose, the invention adopts the following technical scheme:
in a first aspect, a power-closed rack and pinion fatigue test apparatus includes a cast iron platform; a guide rail sliding block module is arranged on the cast iron platform; a rack is movably arranged on the guide rail sliding block module; the rack is respectively meshed with the load gear and the driving gear; the load gear and the driving gear are respectively arranged on the load shaft and the driving shaft; the load shaft and the driving shaft are respectively connected with the load assembly and the driving assembly; the load assembly and the driving assembly are connected with a common direct current bus, and the load assembly and the driving assembly are fixed on a cast iron platform; the load assembly and the drive assembly are controlled by a control system.
Further, the guide rail slide block module comprises a guide rail and a slide block; the guide rail is arranged on the cast iron platform through the matching of the guide rail mounting plate and the guide rail stop block; and the sliding block is provided with a rack mounting plate, and the rack is fixed on the rack mounting plate.
Further, a counter bore is formed in the rack mounting plate; the guide rail slide block module is in locking connection with the rack mounting plate through the counter bore; the rack and the rack mounting plate are positioned by a rack stop block.
Further, the load gear and the drive gear are fixed to the load shaft and the drive shaft, respectively, by a lock washer and a round nut.
Further, the drive assembly includes a drive motor; the driving motor is connected with the driving end speed reducer through a flange plate; the driving end speed reducer is connected with the driving shaft through a driving end coupler; the drive shaft is supported by bearings in the inboard and outboard axle boxes.
Further, the load assembly includes a load motor; the load motor is connected with a load end speed reducer, the load end speed reducer is connected with one end of a torque sensor through a speed reducer shaft, the other end of the torque sensor is connected with a load shaft through a load end coupler, and two sides of the load shaft are respectively arranged in an inner side shaft box and an outer side shaft box.
Further, the outer axle housing includes a first left end cap, a first axle housing, and a first right end cap; the first left end cover and the first right end cover are respectively positioned at two sides of the first axle box body;
a trapezoid groove is formed in the first left end cover, a felt ring is embedded in the trapezoid groove, and the felt ring is sleeved on the load shaft or the driving shaft; two first cylindrical roller bearings are arranged in the box body; the outer rings of the two first cylindrical roller bearings are respectively locked by a first left end cover and a first right end cover, and the inner rings of the two first cylindrical roller bearings are locked with a first round nut through a first stop washer; the inner ring of the first cylindrical roller bearing is sleeved on the load shaft or the driving shaft.
Further, the inner axle box comprises a second left end cover, a second right end cover and a second axle box body; the second left end cover and the second right end cover are respectively arranged at two sides of the second shaft box body;
a trapezoid groove is formed in the second left end cover, and the left felt ring is fixed on the bearing retainer ring through the trapezoid groove in the second left end cover; the inner ring of the bearing retainer ring is provided with threads, and the inner rings of the two second cylindrical roller bearings are locked through threaded connection; the two second cylindrical roller bearings are supported by the axle box body, and the outer rings of the two second cylindrical roller bearings are locked by the second left end cover and the second right end cover; the second right end cover is provided with a trapezoid groove, and the right felt is sleeved on the load shaft or the driving shaft through the trapezoid groove on the second right end cover.
Further, the inner axle box and the outer axle box are both fixed on an axle box seat; the axle box seat is fastened on the cast iron platform through bolts.
In a second aspect, a test method of a power closed rack and pinion fatigue test device is characterized by comprising the following steps:
s1, fixing a load gear and a driving gear on a load shaft and a driving shaft respectively through a stop washer and a round nut;
s2, sleeving two sides of a load shaft and a driving shaft into a first cylindrical roller bearing and a second cylindrical roller bearing respectively, further respectively loading two sides of the load shaft and the driving shaft into an outer shaft box and an inner shaft box, fixing the outer shaft box and the inner shaft box on shaft box seats, and adjusting the distance between the two shaft box seats;
s3, connecting the load shaft and the driving shaft with the load assembly and the driving assembly respectively;
s4, in the test process, setting the output rotating speed and torque of a driving motor, driving a driving gear to move by a driving shaft, driving a rack to reciprocate, and applying torque load by a load gear;
s5, monitoring the torque and the rotating speed in real time through a torque sensor, and uploading the torque and the rotating speed to a client through a control system;
and S6, after the experiment is completed, the outer axle box is disassembled, then the round nut and the stop washer on the axle are taken out, the load gear and the driving gear can be taken out, and then the screw and the rack stop block on the rack mounting plate are loosened to replace the rack.
The power sealing gear rack fatigue test device and the test method thereof provided by the invention have the following beneficial effects:
1. the power closed gear rack fatigue test device and the method can accurately realize the reciprocating motion of the gear rack, visually reflect the fatigue wear condition of the gear rack, provide adjustable load torque and dragging rotating speed, and can autonomously set the operation condition of the gear rack; the degree of automation is high, and the repeatability of test data is good.
2. The invention adopts servo control, the load motor and the driving motor are servo motors, and the output rotating speed and torque and the output rotating speed-time curve can be changed at will so as to meet the requirements of different working conditions.
3. The invention adopts the control of power closure, is beneficial to the full utilization of energy, reduces the energy consumption and is more beneficial to ensuring the accuracy of monitoring data.
4. The space between the driving gear and the load gear can be adjusted so as to meet different running periods, the residual space is fully utilized, and the speed reducer output by the hollow shaft is adopted, so that the space utilization rate is improved.
5. The trapezoid groove is formed in the end cover, and the felt ring is arranged, so that the bearing is more fully lubricated, and the possibility of oil leakage is reduced; the round nut and the stop washer are adopted, so that the disassembly is more convenient and quick;
6. the symmetrical distribution of the bearing and the axle box is beneficial to improving the bearing capacity of the system and increasing the reliability of the system.
Drawings
Fig. 1 is a schematic diagram of a front view structure of a power seal rack and pinion fatigue test device of the invention.
Fig. 2 is a schematic top view of the power-closed rack and pinion fatigue test device of the invention.
FIG. 3 is a schematic diagram of the axial structure of the power-closed rack and pinion fatigue test device of the present invention.
FIG. 4 is a cross-sectional view of an outboard axlebox of a power seal rack and pinion fatigue test apparatus of the present invention.
FIG. 5 is a cross-sectional view of an inboard axle housing of the power seal rack and pinion fatigue test apparatus of the present invention.
FIG. 6 is a graph of speed/torque versus time for a power closed rack and pinion fatigue test apparatus of the present invention.
Wherein, 1, an outer axle box; 2. a round nut; 3. a stop washer; 4. a load gear; 5. a load shaft; 6. an inner axle box; 7. a load end coupling; 8. a drive end coupling; 9. a torque sensor; 10. a decelerator shaft; 11. a cast iron platform; 12. a rack mounting plate; 13. a guide rail mounting plate; 14. a rack; 15. a guide rail slide block module; 16. a shaft box seat; 17. a torque sensor support seat; 18. a driving end speed reducer mounting seat; 19. a drive end speed reducer; 20. loading a speed reducer mounting seat; 21. a load end decelerator; 22. a driving motor; 23. a load motor; 24. a drive shaft; 25. a rack stop; 26. a guide rail stop; 27. a drive gear;
101. a first left end cap; 102. a felt ring; 103. a first cylindrical roller bearing; 104. a first axle housing; 105. a first stop washer; 106. a first round nut; 107. a first right end cap;
601. a second left end cap; 602. a left felt ring; 603. a bearing retainer ring; 604. a second cylindrical roller bearing; 605. a right felt ring; 606. a second right end cap; 607. and a second shaft box body.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and all the inventions which make use of the inventive concept are protected by the spirit and scope of the present invention as defined and defined in the appended claims to those skilled in the art.
Example 1
Referring to fig. 1, this embodiment provides a power seal rack and pinion 14 fatigue test device, and this embodiment can accurately realize rack and pinion 14's reciprocating motion to provide adjustable load torque, drag rotational speed, can independently set up rack and pinion 14's operating mode, degree of automation is high, and test data's reproducibility is good, and it specifically includes:
the cast iron platform 11, the cast iron platform 11 is taken as a bearing platform, and a plurality of T-shaped grooves are formed in the bearing platform;
the cast iron platform 11 is provided with a guide rail slide block module 15, the guide rail slide block module 15 is movably provided with a rack 14, and the rack 14 can move on the guide rail slide block module 15;
the rack 14 is respectively meshed with the load gear 4 and the drive gear 27, and the load gear 4 and the drive gear 27 are respectively arranged on the load shaft 5 and the drive shaft 24; the load shaft 5 and the drive shaft 24 are connected to the load assembly and the drive assembly, respectively;
referring to fig. 2 and 3, the load assembly and the drive assembly are connected by a common dc bus, and the load assembly and the drive assembly are fixed to cast iron platform 11; the load assembly and the drive assembly are controlled by a control system.
Specifically, the guide rail slider module 15 of this embodiment includes a guide rail and a slider, the guide rail is disposed on the cast iron platform 11 through the cooperation of the guide rail mounting plate 13 and the guide rail stopper 26, the guide rail mounting plate 13 is embedded in a T-shaped groove on the cast iron platform 11, the rack mounting plate 12 is mounted on the slider, and the rack 14 is fixed on the rack mounting plate 12.
The rack mounting plate 12 is provided with a counter bore; the guide rail slide block module 15 is in locking connection with the rack mounting plate 12 through the counter bore; the rack 14 is positioned with the rack mounting plate 12 by a rack stop 25.
The load gear 4 and the drive gear 27 are fixed to the load shaft 5 and the drive shaft 24, respectively, by a lock washer 3 and a round nut 2.
As a preferred embodiment, the driving assembly is used for driving the driving shaft 24 and the driving gear 27 to rotate, and comprises a driving motor 22, a driving end speed reducer 19 and a driving end coupler 8, wherein the driving motor 22 is a servo motor;
specifically, the driving motor 22 is connected with the driving end reducer 19 through a flange, the driving end reducer 19 is a shaft output reducer, the driving end reducer is connected with the driving shaft 24 through the driving end coupler 8, the driving shaft 24 is supported by bearings in the inner axle box 6 and the outer axle box 1, and the axle boxes are fixed on the axle box seat 16.
The driving end speed reducer 19 is fixed on the driving end speed reducer mounting seat 18, and the driving end speed reducer mounting seat 18 is fixed on the cast iron platform 11 through bolts.
As one preferable of the present embodiment, the load assembly includes a load motor 23, a load end decelerator 21, a decelerator shaft 10, a torque sensor 9, a torque sensor support 17, and a load end coupling 7.
Specifically, the load motor 23 is connected with the load end speed reducer 21 through a flange, the load end speed reducer 21 is a hollow shaft output speed reducer, the speed reducer shaft 10 connects the torque sensor 9 with the load end speed reducer 21, the speed reducer shaft 10 is respectively matched with the hollow shaft of the speed reducer and the input shaft of the torque sensor 9 through key connection, the output shaft of the torque sensor 9 is connected with the load shaft 5 through the load end shaft coupling 7, and the load shaft 5 is supported by bearings in the inner axle box 6 and the outer axle box 1.
The load end speed reducer 21 is mounted on the load speed reducer mounting base 20, and the load speed reducer mounting base 20 is fixed on the cast iron platform 11 through bolts.
The torque sensor 9 is fixed on the cast iron platform 11 through a torque sensor supporting seat 17.
The inner axle box 6 and the outer axle box 1 are both fixed on an axle box seat 16; the axle box seat 16 is fastened to the cast iron platform 11 by bolts. Specifically, the axle box seat 16 is fixed in a T-shaped groove of the cast iron platform 11, and can move in the groove before fastening, so that the distance between the two axle box seats 16, namely the center distance between the two gears, can be adjusted automatically.
The driving shaft 24 and the load shaft 5 of the present embodiment are designed with threaded portions for mounting the stop washer 3 and the round nut 2, and the stop washer 3 and the round nut 2 cooperate with each other to reliably fix the gear in the axial direction.
Wherein, referring to fig. 4, the outboard axle housing 1 includes a first left end cover 101, a first axle housing 104, and a first right end cover 107;
the first left end cover 101 and the first right end cover 107 are respectively positioned at two sides of the first axle box 104;
the first left end cover 101 is provided with a trapezoid groove, a felt ring 102 is embedded in the trapezoid groove, and the felt ring 102 is sleeved on the load shaft 5 or the driving shaft 24; two first cylindrical roller bearings 103 are arranged in the box body; the outer rings of the two first cylindrical roller bearings 103 are respectively locked by a first left end cover 101 and a first right end cover 107, and the inner rings of the two first cylindrical roller bearings 103 are locked with a first round nut 106 through a first stop washer 105; the inner ring of the first cylindrical roller bearing 103 is sleeved on the load shaft 5 or the driving shaft 24, so that the axial movement of the first cylindrical roller bearings is prevented.
Referring to fig. 5, the inboard axle housing 6 includes a second left end cover 601, a second right end cover 606, and a second axle housing 607;
the second left end cover 601 and the second right end cover 606 are respectively arranged at two sides of the second shaft box 607;
the second left end cover 601 is provided with a trapezoid groove, and the left felt ring 602 is fixed on the bearing retainer ring 603 through the trapezoid groove on the second left end cover 601; the inner ring of the bearing retainer ring 603 is provided with threads, and the inner rings of the two second cylindrical roller bearings 604 are locked through threaded connection; two second cylindrical roller bearings 604 are supported by the axle box body, and the outer rings of the two second cylindrical roller bearings 604 are locked by a second left end cover 601 and a second right end cover 606; the second right end cover 606 is provided with a trapezoid groove, and the right felt 605 is sleeved on the load shaft 5 or the driving shaft 24 through the trapezoid groove on the second right end cover 606.
The bearing retainer ring 603 is arranged in the axle box of the embodiment and is used for adjusting the gap of the bearing in the axle box, and the bearing retainer ring 603 is connected with the axle through threads, so that the bearing retainer ring 603 is convenient to assemble and disassemble;
in the embodiment, the rack 14, the guide rail and the slide block are all designed with positioning stop blocks, and the tight fit among all the components is ensured by the bolt connection structure of the rack 14, the guide rail and the slide block; and the rack mounting plate 12 adopts high-strength aluminum alloy, so that the inertia of the whole system is reduced, and the response speed of the system is improved.
The design height of the shaft box seat 16 is lower than the meshing height of the gear rack 14, and the shaft box seat 16 can be removed when the gear rack 14 is replaced, so that the position precision in repeated installation is guaranteed, the coaxiality and parallelism of each component are guaranteed, the repeatability of experimental data is guaranteed, and the experimental operation difficulty is reduced.
As one preferable mode of the embodiment, the control system adopts a variable frequency speed regulation system, and comprises an active rectifying and motor module, so that three-phase alternating current can be rectified into direct current, the direct current can be fed back to a power grid, the direct current bus voltage can be subjected to closed-loop control, the stability of the rectified bus voltage can be kept, and the stability of a test speed-time curve is ensured.
The control system shares a direct current bus, and in the normal linkage test, the driving motor 22 controls the position and the speed and operates in an electric state; the load motor 23 outputs torque and operates in a power generation state. And according to the speed control loading torque, energy is exchanged on the direct current bus, and the rectifying module provides starting, braking and system loss.
The embodiment adopts a variable-frequency speed regulation system control, comprises an active rectifying and motor module, can rectify three-phase alternating current into direct current, can feed back the direct current to a power grid, performs closed-loop control on the voltage of a direct current bus, and keeps the voltage of the rectifying bus stable.
In the control system of the embodiment, the direct current bus is shared, and in a normal linkage test, the driving motor 22 is controlled by position and speed and operates in an electric state; the load motor 23 is torque controlled, operates in a generating state, loads torque according to speed control, energy is exchanged on the direct current bus, and the rectifying module provides starting, braking and system losses.
The control mode of the embodiment can select local/remote control, the system can be started to operate on a touch screen in the local state, and the remote control is controlled by a PC through TCP/IP and PLC communication.
The local control system of the embodiment can be selectively debugged, single and continuous in operation;
the adjustment means that the driving motor 22 is single-action position and speed control or the load motor 23 is single-action position and speed control;
the single driving motor 22 is in position and speed mode control, the load motor 23 is in torque mode control, and the operation is automatically stopped in a cycle period after the starting;
the continuous, i.e. drive motor 22 is in position + speed mode control, load motor 23 is in torque mode control, and the cycle runs until the test cycle is up or a stop button is pressed.
The remote control of this embodiment may set system parameter limits:
front and rear limit position limits, rotational speed limits, torque limits, acceleration limits, etc.;
and (3) limiting process parameters:
setting parameter values such as position, speed, torque, test cycle period and the like; starting and stopping the system;
operation mode selection:
single and continuous. And (3) displaying the system state: motor speed, voltage, current, torque, temperature, lubrication oil level, etc., test times statistics mode control, load motor 23 is torque mode control, and the cycle runs until the test cycle is up to or a stop button is pressed.
Example 2
Referring to fig. 1 to 6, the present embodiment provides a test method of a power-closed rack and pinion 14 fatigue test apparatus, which is characterized by comprising the steps of:
step S1, fixing a load gear 4 and a driving gear 27 on the load shaft 5 and the driving shaft 24 respectively through a stop washer 3 and a round nut 2;
step S2, sleeving two sides of a load shaft 5 and a driving shaft 24 into a first cylindrical roller bearing 103 and a second cylindrical roller bearing 604 respectively, loading two sides of the load shaft 5 and the driving shaft 24 into an outer axle box 1 and an inner axle box 6 respectively, fixing the outer axle box 1 and the inner axle box 6 on an axle box seat 16, and adjusting the distance between the two axle box seats 16;
step S3, connecting the load shaft 5 and the driving shaft 24 with a load assembly and a driving assembly respectively;
step S4, during the test process, setting the output rotation speed and torque of the driving motor 22, driving the driving shaft 24 to drive the driving gear 27 to move, further driving the rack 14 to reciprocate, and applying torque load by the load gear 4;
step S5, monitoring the torque and the rotating speed in real time through a torque sensor 9, and uploading the torque and the rotating speed to a client through a control system;
and S6, after the experiment is completed, the outer axle box 1 is disassembled, the round nut 2 and the stop washer 3 on the axle are taken out, the load gear 4 and the driving gear 27 can be taken out, and then the screw on the rack mounting plate 12 and the rack stop 25 are loosened to replace the rack 14.
According to the invention, the motor drives the gear 27 to rotate, and the gear drives the rack 14 to reciprocate, so that the fatigue test of the rack and pinion 14 is performed. The driving motor 22 outputs rotating speed, the load motor 23 outputs torque, and meanwhile, the load motor 23 is connected with a direct current bus shared by the driving motor 22 to recover energy and realize power sealing; the running state of the gear rack 14 can be accurately displayed, the fatigue wear condition of the gear rack 14 is intuitively reflected, the automation degree is high, and the experimental data repeatability is good.
Although specific embodiments of the invention have been described in detail with reference to the accompanying drawings, it should not be construed as limiting the scope of protection of the present patent. Various modifications and variations which may be made by those skilled in the art without the creative effort are within the scope of the patent described in the claims.
Claims (10)
1. A power closed gear rack fatigue test device is characterized in that: comprises a cast iron platform (11); a guide rail sliding block module (15) is arranged on the cast iron platform (11); a rack (14) is movably arranged on the guide rail sliding block module (15); the rack (14) is respectively meshed with the load gear (4) and the driving gear (27); the load gear (4) and the driving gear (27) are respectively arranged on the load shaft (5) and the driving shaft (24); the load shaft (5) and the drive shaft (24) are respectively connected with a load assembly and a drive assembly; the load assembly and the driving assembly are connected through a direct current bus, and the load assembly and the driving assembly are fixed on the cast iron platform (11); the load assembly and the drive assembly are controlled by a control system.
2. The power-closed rack and pinion fatigue test device of claim 1, wherein: the guide rail and slide block module (15) comprises a guide rail and a slide block; the guide rail is arranged on the cast iron platform (11) through the matching of the guide rail mounting plate (13) and the guide rail stop block (26); the sliding block is provided with a rack mounting plate (12), and the rack (14) is fixed on the rack mounting plate (12).
3. The power-closed rack and pinion fatigue test device of claim 2, wherein: the rack mounting plate (12) is provided with a counter bore; the guide rail sliding block module (15) is in locking connection with the rack mounting plate (12) through the counter bore; the rack (14) and the rack mounting plate (12) are positioned by a rack stop block (25).
4. The power-closed rack and pinion fatigue test device of claim 1, wherein: the load gear (4) and the drive gear (27) are respectively fixed on the load shaft (5) and the drive shaft (24) through a stop washer (3) and a round nut (2).
5. The power-closed rack and pinion fatigue test device of claim 1, wherein: the drive assembly includes a drive motor (22); the driving motor is connected with the driving end speed reducer (19) through a flange plate; the driving end speed reducer (19) is connected with the driving shaft (24) through the driving end coupler (8); the drive shaft (24) is supported by bearings in the inner axle housing (6) and the outer axle housing (1).
6. The power-closed rack and pinion fatigue test device of claim 5, wherein: the load assembly comprises a load motor (23); the load motor (23) is connected with the load end speed reducer (21), the load end speed reducer (21) is connected with one end of the torque sensor (9) through the speed reducer shaft (10), the other end of the torque sensor (9) is connected with the load shaft (5) through the load end coupler (7), and two sides of the load shaft (5) are respectively arranged in the inner axle box (6) and the outer axle box (1).
7. The power-closed rack and pinion fatigue test device of claim 6, wherein: the outer axle box (1) comprises a first left end cover (101), a first axle box body (104) and a first right end cover (107); the first left end cover (101) and the first right end cover (107) are respectively positioned at two sides of the first axle box body (104);
a trapezoid groove is formed in the first left end cover (101), a felt ring (102) is embedded in the trapezoid groove, and the felt ring (102) is sleeved on the load shaft (5) or the driving shaft (24); two first cylindrical roller bearings (103) are arranged in the box body; the outer rings of the two first cylindrical roller bearings (103) are respectively locked by a first left end cover (101) and a first right end cover (107), and the inner rings of the two first cylindrical roller bearings (103) are locked with a first round nut (106) through a first stop washer (105); the inner ring of the first cylindrical roller bearing (103) is sleeved on the load shaft (5) or the driving shaft (24).
8. The power-closed rack and pinion fatigue test device of claim 6, wherein: the inner axle box (6) comprises a second left end cover (601), a second right end cover (606) and a second axle box body (607); the second left end cover (601) and the second right end cover (606) are respectively arranged at two sides of the second shaft box body (607);
the second left end cover (601) is provided with a trapezoid groove, and a left felt ring (602) is fixed on a bearing retainer ring (603) through the trapezoid groove on the second left end cover (601); the inner rings of the bearing retainer rings (603) are provided with threads, and the inner rings of the two second cylindrical roller bearings (604) are locked through threaded connection; the two second cylindrical roller bearings (604) are supported by the axle box body (607), and the outer rings of the two second cylindrical roller bearings (604) are locked by the second left end cover (601) and the second right end cover (606); the second right end cover (606) is provided with a trapezoid groove, and the right felt (605) is sleeved on the load shaft (5) or the driving shaft (24) through the trapezoid groove on the second right end cover (606).
9. The power-closed rack and pinion fatigue test device of claim 6, wherein: the inner axle box (6) and the outer axle box (1) are both fixed on an axle box seat (16); the axle box seat (16) is fastened on the cast iron platform (11) through bolts.
10. A test method using the power-closed rack and pinion fatigue test apparatus according to any one of claims 1 to 9, comprising the steps of:
s1, a load gear (4) and a driving gear (27) are respectively fixed on a load shaft (5) and a driving shaft (24) through a stop washer (3) and a round nut (2);
s2, sleeving two sides of a load shaft (5) and a driving shaft (24) into a first cylindrical roller bearing (103) and a second cylindrical roller bearing (604) respectively, further respectively installing two sides of the load shaft (5) and the driving shaft (24) into an outer axle box (1) and an inner axle box (6), fixing the outer axle box (1) and the inner axle box (6) on an axle box seat (16), and adjusting the distance between the two axle box seats (16);
s3, connecting a load shaft (5) and a driving shaft (24) with the load assembly and the driving assembly respectively;
s4, in the test process, setting the output rotating speed and torque of a driving motor (22), driving a driving gear (27) to move by a driving shaft (24), driving a rack (14) to reciprocate, and applying torque load by a load gear (4);
s5, monitoring the torque and the rotating speed in real time through a torque sensor (9), and uploading the torque and the rotating speed to a client through a control system;
s6, after the experiment is completed, the outer axle box (1) is disassembled, the round nut (2) and the stop washer (3) on the axle are taken out, the load gear (4) and the driving gear (27) can be taken out, and then the screw and the rack stop block (25) on the rack mounting plate (12) are loosened to replace the rack (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311077243.0A CN116952567A (en) | 2023-08-24 | 2023-08-24 | Fatigue test device and method for power closed gear rack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311077243.0A CN116952567A (en) | 2023-08-24 | 2023-08-24 | Fatigue test device and method for power closed gear rack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116952567A true CN116952567A (en) | 2023-10-27 |
Family
ID=88451332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311077243.0A Pending CN116952567A (en) | 2023-08-24 | 2023-08-24 | Fatigue test device and method for power closed gear rack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116952567A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507180A (en) * | 2011-09-28 | 2012-06-20 | 郑州机械研究所 | Mobile constant-load gear-rack comprehensive performance test bed |
| CN105186763A (en) * | 2015-10-15 | 2015-12-23 | 苏州萨伯工业设计有限公司 | Motor bearing structure |
| CN106644459A (en) * | 2016-09-26 | 2017-05-10 | 中国矿业大学 | Sprocket fatigue test tester and test method |
| CN107036809A (en) * | 2017-04-20 | 2017-08-11 | 重庆齿轮箱有限责任公司 | One kind lifting gear-box experimental provision |
| CN112964465A (en) * | 2021-02-06 | 2021-06-15 | 中铁二院工程集团有限责任公司 | Rack meshing test device |
-
2023
- 2023-08-24 CN CN202311077243.0A patent/CN116952567A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507180A (en) * | 2011-09-28 | 2012-06-20 | 郑州机械研究所 | Mobile constant-load gear-rack comprehensive performance test bed |
| CN105186763A (en) * | 2015-10-15 | 2015-12-23 | 苏州萨伯工业设计有限公司 | Motor bearing structure |
| CN106644459A (en) * | 2016-09-26 | 2017-05-10 | 中国矿业大学 | Sprocket fatigue test tester and test method |
| CN107036809A (en) * | 2017-04-20 | 2017-08-11 | 重庆齿轮箱有限责任公司 | One kind lifting gear-box experimental provision |
| CN112964465A (en) * | 2021-02-06 | 2021-06-15 | 中铁二院工程集团有限责任公司 | Rack meshing test device |
Non-Patent Citations (1)
| Title |
|---|
| 王大康 等: "《机械设计基础》", vol. 4, 31 October 2020, 机械工业出版社, pages: 215 - 219 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103624555A (en) | Static pressure heavy-load direct-drive high-accuracy rotating table | |
| CN109470479B (en) | Friction performance test bed for large-shaft-diameter sliding bearing group with adjustable distance under dynamic load | |
| CN209264286U (en) | Petrochemical industry unit bearing failure diagnosis and residual service life prediction device | |
| CN204308694U (en) | A kind of can the swinging centreless grinding machine external of accurate Solid rocket engine | |
| CN210188570U (en) | Novel on-spot processing equipment | |
| CN203578783U (en) | Double-column fixed-beam numerical control vertical lathe | |
| CN116952567A (en) | Fatigue test device and method for power closed gear rack | |
| CN103089928A (en) | Bearing grease lubrication megawatt-level ten-shunting wind power acceleration box | |
| CN203572624U (en) | Axial static rigidity test system for ball screw assembly | |
| CN201603977U (en) | Ball screw jacking type automatic anti-playing idler rack | |
| CN103791033A (en) | Duplex double-arm type wind power speed increasing gearbox with bearings lubricated by grease | |
| CN109540518A (en) | Petrochemical industry unit bearing failure diagnosis and residual service life prediction device and its control circuit | |
| CN215148858U (en) | Clamping and fastening device for assembling gear box | |
| CN103894864A (en) | Vertical machining center | |
| CN214869214U (en) | Hybrid bearing main shaft unit mechanism for heavy crankshaft grinding machine | |
| CN215239263U (en) | Four-axis numerical control machine tool turntable device | |
| CN101733674B (en) | Actuating device for horizontal internal broaching machine | |
| CN115303474A (en) | Electric drive variable-pitch propeller device with large torque output | |
| CN109708876B (en) | Loading test device of drum type filter screen speed reduction driving device | |
| CN109482935B (en) | Automatic feeding mechanism of boring plane cutter arm | |
| Shishlyannikov et al. | Operational control and diagnostics of the equipment by the parameters of the electric drive power supply by the example of deep well pump units | |
| CN114018388B (en) | Multifunctional vibration detection comprehensive test bed | |
| CN103089929A (en) | Bearing grease lubrication megawatt-level quasi satellite semi-direct-driving wind power acceleration box | |
| CN215657879U (en) | High-precision dual-drive spindle control box | |
| CN102270002B (en) | System capable of controlling viscosity of electric spindle lubricant and method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |