CN212206940U - Impact-resistant fatigue life testing machine for ceramic balls - Google Patents
Impact-resistant fatigue life testing machine for ceramic balls Download PDFInfo
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- CN212206940U CN212206940U CN202020633586.6U CN202020633586U CN212206940U CN 212206940 U CN212206940 U CN 212206940U CN 202020633586 U CN202020633586 U CN 202020633586U CN 212206940 U CN212206940 U CN 212206940U
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Abstract
The utility model discloses a ceramic ball impact fatigue life testing machine, which comprises a shell, a lifting transmission device and a power supply system; the ball inlet and the ball outlet are arranged on the shell, and the ball outlet is positioned below the ball inlet; the collision plate is arranged between the ball inlet and the ball outlet; the lifting transmission device is provided with a transmission belt and a lifting hopper arranged on the transmission belt; the ball inlet and the ball delivery port are arranged on the lifting transmission device, and the ball inlet is positioned below the ball delivery port; the first conveying assembly is used for receiving the ceramic balls from the ball outlet and transferring the ceramic balls to the ball inlet, and the ceramic balls enter the lifting bucket through the ball inlet; and the second conveying assembly extends into the ball feeding port and is used for receiving the ceramic balls from the elevator bucket and conveying the ceramic balls to the ball feeding port. Promote the development of the ceramic ball industry to the aspects of high strength, high wear resistance and high impact toughness, and promote the common progress of the ceramic ball industry and the cement industry.
Description
Technical Field
The utility model relates to a ceramic ball field of shocking resistance especially relates to a fatigue life testing machine shocks resistance of ceramic ball.
Background
The impact fatigue life index of the ceramic ball is an important index of the wear-resistant alumina ceramic ball for the cement grinding system.
At present, equipment for detecting the impact-resistant fatigue life of ceramic balls does not exist, and the acceptance of ceramic (ceramic ball) ball products is realized through manual operation, namely, the ceramic balls are thrown out from a free falling body with the height of 6 meters or a certain height and impact on a steel plate, and whether the ceramic balls are damaged or not is observed after a certain number of times.
The test process has several problems, one is that the field of the test is difficult to select, and the test is difficult to realize in a common laboratory; secondly, the influence factor of a person is large in the test process; and thirdly, the labor hour consumption of the test is high, the test can be realized only by 2 persons, the ball needs to be thrown down after being continuously conveyed to a certain height, and the impact fatigue life of the ceramic ball is difficult to measure for thousands of times in the test process.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, an object of the utility model is to provide a fatigue life testing machine shocks resistance of ceramic ball.
A ceramic ball impact fatigue life tester, comprising: the device comprises a shell, a lifting transmission device and a power supply system;
the ball inlet and the ball outlet are arranged on the shell, and the ball outlet is positioned below the ball inlet;
the collision plate is arranged between the ball inlet and the ball outlet;
the lifting transmission device is provided with a transmission belt and a lifting hopper arranged on the transmission belt, the higher end of the transmission belt is close to the ball inlet, and the lower end of the transmission belt is close to the ball outlet;
the ball inlet and the ball delivery port are arranged on the lifting transmission device, and the ball inlet is positioned below the ball delivery port;
the first conveying assembly is used for receiving the ceramic balls from the ball outlet and transferring the ceramic balls to the ball inlet, and the ceramic balls enter the lifting bucket through the ball inlet;
and the second conveying assembly extends into the ball feeding port and is used for receiving the ceramic balls from the elevator bucket and conveying the ceramic balls to the ball feeding port.
Further, the lift bucket comprises a base plate connected with a conveying belt;
the bottom plate is oppositely provided with side plates, one ends of the side plates are connected through a ball receiving plate, and the other ends of the side plates are connected through a ball guide plate;
the ball storage space is enclosed by the bottom plate, the side plates, the ball receiving plate and the ball guide plate, the included angle between the ball receiving plate and the bottom plate is 60-85 degrees, and the included angle between the ball guide plate and the bottom plate is not less than 140 degrees.
Furthermore, the ball receiving plate and the ball guide plate of the adjacent elevator buckets are contacted.
Further, the ball outlet is provided with a hollow closed disc, a turntable is arranged in the disc, the turntable is controlled by a motor to rotate at a constant speed, and the turntable is provided with a plurality of accelerating channels;
and a ceramic ball outlet is arranged right above the collision plate relative to the disc, and when the ceramic balls reach the ceramic ball outlet, the linear velocity and the acceleration direction are both vertically downward.
Further, be equipped with the sieving mechanism between first conveying component and the income ball mouth, the sieving mechanism includes transmission channel, transmission channel includes the sieve of compriseing a plurality of connecting rods, the ball district is connected to the one end of sieve, the ball district is used for accepting the ceramic ball that comes from first conveying component, the other end of sieve connects out the ball district, go out the ball district and go into ball mouth intercommunication.
Furthermore, the distance between the connecting rods can be adjusted according to the particle size of the ceramic balls.
Further, the first conveying assembly comprises a lower conveying belt and a lower frequency conversion motor, the falling point of the ceramic ball is located in the middle of the lower conveying belt, and the lower frequency conversion motor can control the lower conveying belt to convey the ceramic ball to the positive direction or the negative direction.
The lower transmission band is externally provided with a protective cover, and the width of the protective cover is gradually reduced from one end of the ball outlet to the other end of the protective cover.
Furthermore, the lifting transmission device, the first transmission assembly and the second transmission assembly are in signal connection with the control system.
And the lifting transmission device, the first transmission assembly, the second transmission assembly and the motor are in signal connection with the control system.
Furthermore, the control system is provided with a touch screen control operation panel, a frequency converter, an encoder, a PLC host, an expansion unit, an analog input unit, a transformer and a filter, and can directly program input parameters and control the transmission speed and/or the ball feeding speed and/or the impact speed of the ceramic balls.
Compared with the prior art, the beneficial effect of this application lies in:
1. the utility model provides a selection problem in experimental place, also solved the uncertain factor among the manual test process, but this equipment labour saving and time saving and effectual anti fatigue life who measures ceramic ball replace the manual work to carry out the effective anti fatigue life who measures ceramic ball of thousands of times test, guide customer's production and use, promote the ceramic ball trade to high strength, high wearability, high impact toughness aspect development, promote the common progress of ceramic ball trade and cement trade.
2. The utility model discloses bottom plate, curb plate, ball receiving plate, ball guide plate enclose into a ball storage space, the contained angle between ball receiving plate and the bottom plate is 60-85, the contained angle between ball guide plate and the bottom plate is not less than 140, 60-85 degree angle can guarantee that ceramic ball catches ceramic ball smoothly when falling into the elevator bucket, when the top contained angle is not less than 140 degree upset, can pour ceramic ball smoothly; the bottom between the two lifting buckets is also provided with a gap, so that the ceramic balls are prevented from being extruded and collided when the lifting buckets are turned over.
3. The utility model discloses the carousel is provided with a plurality of channels with higher speed, can fall with arbitrary speed when making ceramic ball throw at arbitrary height.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of a control system module according to the present invention.
Fig. 3 is a control schematic diagram of the control system of the present invention.
Fig. 4 is a schematic structural diagram of the housing of the present invention.
Fig. 5 is a schematic structural diagram of the first conveying assembly of the present invention.
Fig. 6 is the structure diagram of the screening device of the present invention.
Fig. 7 is the schematic structural view of the lifting transmission device of the present invention.
Fig. 8 is a schematic view of the structure of the bucket.
Reference numerals shown in the drawings: 1-a control system; 2-a shell; 21-a collision plate; 22-a disc; 23-a turntable; 24-an acceleration channel; 25-an outlet; 26-a motor; 27-a ball inlet; 3-a ball outlet; 4-a first transfer assembly; 5-a screening device; 51-sieve plate; 52-goal area; 53-ball out zone; 6-lifting the conveying device; 7-a second transfer assembly; 8-a photoelectric counter; 9-a lift bucket; 91-side plate; 92-a ball receiving plate; 93-a ball guide plate; 10-ceramic balls.
Detailed Description
The embodiment provides a ceramic ball impact fatigue life testing machine, includes:
the device comprises a shell 2, a lifting transmission device 6 and a power supply system;
the ball inlet 27 and the ball outlet 3 are arranged on the shell 2, and the ball outlet 3 is positioned below the ball inlet;
the collision plate 21 is arranged between the ball inlet and the ball outlet 3, and the collision plate 21 is fixed between the ball inlet and the ball outlet 3 by a metal disc 22 with the diameter of 200mm and the thickness of 20 mm;
the lifting transmission device 6 is provided with a transmission belt and a lifting hopper 9 arranged on the transmission belt, the transmission belt is driven by a lifting motor, the higher end of the transmission belt is close to the ball inlet, and the lower end of the transmission belt is close to the ball outlet 3;
the ball inlet and the ball delivery port are arranged on the lifting transmission device 6, and the ball inlet is positioned below the ball delivery port; the ball outlet 3 is provided with a hollow closed disc 22, a rotary disc 23 is arranged in the disc 22, the rotary disc 23 is controlled by a motor 26 to rotate at a constant speed, and the rotary disc 23 is provided with a plurality of accelerating channels 24; the ceramic balls are fed into the center of the acceleration turntable 23, the turntable 23 centrifugally accelerates the relatively stationary ceramic balls at a constant angular velocity ω, and finally throws the ceramic balls out of the outlet 25 at a constant velocity of the linear velocity. The design has the advantages that the acceleration of the ceramic balls is started from 0, the problem that the ceramic balls collide with the rotary table 23 in the acceleration process does not exist (if the ceramic balls directly collide with the rotary table 23 after entering an acceleration system, the ceramic balls cannot be accelerated), the speed of the rotary table 23 is controllable, the ceramic balls are input from the middle of the acceleration rotary table 23, the process from rest to acceleration of the ceramic balls is realized through the acceleration of the rotary table 23, the automation is realized in the whole process, the output speed of the ceramic balls can be controlled at will, the speed of the thrown ceramic balls is controllable, the running time between each acceleration channel 24 is controllable, and the throwing direction of the ceramic balls is consistent and controllable; the rotary table 23 is controlled to rotate through the variable frequency motor 26 to perform uniform-speed circular motion, the collision plate 21 is arranged below the rotary table 23 in the centrifugal direction, the disc 22 is arranged right above the collision plate 21 relatively, the ceramic ball outlet 25 is arranged right above the ceramic ball outlet 25, when the ceramic balls reach the ceramic ball outlet 25, the linear velocity and the acceleration are vertical and downward, and the collision plate 21 is just positioned at the position where the ceramic balls fly out along the tangent line of the outlet 25, so that direct collision can be realized.
The first conveying assembly 4 is provided with a lower conveying belt and a lower frequency conversion motor and is used for receiving the ceramic balls from the ball outlet 3 and transferring the ceramic balls to the ball inlet; first conveying assembly 4 can realize corotation and reversal function, and as the alternative, the one end of keeping away from hoisting device at first conveying assembly 4 sets up the collecting vat, and the conveying belt corotation can be sent into sieving mechanism 5 with the ceramic ball that overflows and participate in the circulation, and the reversal can be sent into the collecting vat with overflowing the ceramic ball after the test that stops. Alternatively, the first conveying assembly includes a lower conveying belt, and a down-conversion motor, the ceramic balls having a falling point located at a middle portion of the lower conveying belt, and the down-conversion motor may control the lower conveying belt to convey the ceramic balls in a forward direction or a reverse direction. Alternatively, a recycling hopper is provided at the other end of the lower conveyor belt, and ceramic balls 10 are transported in the reverse direction to transport the ceramic balls 10 to the recycling hopper. As shown in fig. 6, in order to prevent ceramic balls from falling, a lower conveyor belt may be covered with a housing, the ceramic balls entering an elevator bucket 9, specifically the elevator bucket 9, via a ball inlet, the elevator bucket 9 including a bottom plate connected to the conveyor belt; the bottom plate is oppositely provided with side plates 91, one ends of the side plates 91 are connected through ball receiving plates 92, and the other ends of the side plates 91 are connected through ball guide plates 93; the bottom plate, the side plate 91, the ball receiving plate 92 and the ball guide plate 93 enclose a ball storage space, the included angle between the ball receiving plate 92 and the bottom plate is 60-85 degrees, the included angle between the ball guide plate 93 and the bottom plate is not less than 140 degrees, the ball receiving plate 92 and the ball guide plate 93 adjacent to the lifting bucket 9 are in contact, the bottom between the two bucket lifting grooves is also provided with a gap, the squeezing collision of ceramic balls can be avoided during overturning, the lifting buckets 9 are uniformly arranged on a transmission belt and are driven by the variable frequency motor 26 to circularly operate, the angle of the lifting bucket 9 can be conveyed to the top end to overturn after the ceramic balls are received at the bottom end through multiple tests, further as an optional scheme, a screening device 5 is arranged between the first conveying assembly 4 and the ball inlet, the screening device 5 comprises a conveying channel, the conveying channel comprises a screening plate 51 consisting of a plurality of connecting rods (such as connecting rods), the distance between the connecting rods can be adjusted according to the particle size of the ceramic balls; one end of the sieve plate 51 is connected with a ball inlet area 52, the ball inlet area 52 is used for receiving ceramic balls from the first conveying assembly 4, the other end of the sieve plate 51 is connected with a ball outlet area 53, the ball outlet area 53 is communicated with a ball inlet, and as an alternative, the ball outlet area 53 is provided with an arc-shaped ball conveying plate to prevent the ceramic balls from being accumulated in the ball outlet area 53.
The second conveying assembly 7 is composed of an upper conveying belt and an upper variable frequency motor, the conveying belt extends into the ball conveying port and is used for receiving ceramic balls from the elevator bucket 9, the ceramic balls are conveyed to the ball inlet, the ceramic balls can be circularly conveyed into the shell 2, automatic continuous ball feeding is achieved, the ceramic balls are accelerated from 0 to complete an impact-resistant fatigue life test of the ceramic balls, and as an alternative, a photoelectric counter 8 is arranged on the second conveying assembly and can be selected from a JDM11-6H photoelectric counter to record the times of the impacted balls.
The ceramic ball impact-resistant fatigue life testing method further comprises a control system 1, the lifting transmission device 6, the first transmission component 4, the second transmission component 7 and the motor 26 are in signal connection with the control system 1, the control system 1 is specifically provided with a touch screen control operation panel, a frequency converter, an encoder, a PLC host, an expansion unit, an analog input unit, a transformer and a filter, wherein the motor 26, the lifting motor, the up-conversion motor and the down-conversion motor are collectively called as a mechanical and power unit, input parameters can be directly programmed, the mechanical and power unit is controlled to comprise a ceramic ball transmission speed and/or a ball inlet speed and/or an impact speed, the speed of throwing the ceramic balls out of a ceramic ball outlet 25 can be changed by changing the rotating speed of the turntable 23, the impact-resistant fatigue life testing method for the ceramic balls is provided in the embodiment, and comprises the following steps of randomly selecting a plurality of ceramic balls, and controlling the ceramic balls to vertically fall to the collision plate 21 at a speed of 8.90 +/-0.05 m/s, wherein the falling height difference is 3-5 m, the falling height is 4 m in the embodiment, the collision plate 21 is made of high-strength medium carbon steel with the hardness not lower than HRC60, and the specific acceleration mode is as follows: the ceramic balls are sent to the central position of the accelerating turntable 23 through the ball inlet, the turntable 23 centrifugally accelerates the relatively static ceramic balls at a constant angular velocity omega, and finally throws the ceramic balls out of the outlet 25 at a constant velocity of a linear velocity to collide with the collision plate 21;
and the first conveying assembly 4 is used for conveying the impacted ceramic balls into the lifting conveying device 6, the lifting conveying device is used for transferring the impacted ceramic balls to the ball inlet for impacting again, and the steps are sequentially circulated until the preset conditions are reached, and counting the impacting times of the damaged ceramic balls to calculate the average impact-resistant fatigue life of the ceramic balls.
The test method of the tester for the impact resistance fatigue life machine of the ceramic ball comprises the following steps,
step 1: randomly selecting a plurality of ceramic balls, putting the ceramic balls into the shell from the ball inlet, and controlling the ceramic balls to vertically fall to the collision plate at the speed of 8.90 +/-0.05 m/s, wherein the falling height difference is 3-5 m;
step 2: the first conveying assembly conveys the impacted ceramic balls into a lifting conveying device;
and step 3: the ceramic balls after impact are transferred to the ball inlet by the lifting transmission device to impact again, the operation is circulated in sequence, the number of times of impact when each damaged ceramic ball is damaged is counted until the preset condition is reached, the average impact-resistant fatigue life of the ceramic balls is further calculated, and the impact fatigue life of the ceramic balls is determined according to a formula (C-1):
in the formula (C-1), the average impact fatigue life of the N-ceramic ball is one time; n is a radical ofi-impact fatigue life/time of the ith ceramic ball.
The implementation takes the ceramic ball as an example to provide a specific implementation experiment by using the impact fatigue life testing machine for the ceramic ball of the embodiment, and the testing steps comprise:
randomly selecting a plurality of (such as 10) ceramic balls with qualified appearance quality to be loaded into a ball inlet hopper;
turning on a power switch, starting a belt reverse rotation button of the first conveying assembly, and cleaning sundries in a conveying channel of the testing machine;
adjusting parameters of a turntable motor to enable the ball throwing linear speed to be 8.90 +/-0.05 m/s;
the starting equipment is started by pressing the starting button, the balls are sent into the shell, when the damage number of the ceramic balls reaches a set value, a preset condition is reached, the impact is stopped when the set damage number reaches 3, the accumulated number Ni of the collision occurring when the previous 3 test balls fail is recorded respectively, the time point when each ceramic ball is broken can be automatically identified or manually counted, and the labor number and the labor amount are reduced compared with the prior art even if manual counting is adopted;
after the test is finished, recovering the test ball in the test channel and turning off the power supply;
and (4) calculating a result: the impact fatigue life of the ceramic ball is determined according to the formula (C-1):
since the number of collisions per ceramic ball is in the tens of thousands, all i have selected the number of 3 failed balls out of 10 balls to evaluate fatigue life, as: the number of ball failures of 1 st ball was 135000, the second was 152000, and the third was 181000, then the fatigue life of the batch of ceramic balls was:
7 × 135000/270+7 × 152000/216+18100/24 ═ 3500+4926+7542 ═ 15968 times
The principle is as follows: since the counter records the number of balls that are input into the acceleration system cumulatively, the number of times that all 1 st balls fail is N1, and the actual number of 1 st ball hits is N1/10;
the number of times recorded when the 2 nd ball failed was N2, and the actual number of times of collision of the 2 nd ball was (N2-N1)/9+ N1/10;
the number of times recorded when the 3 rd ball failed was N3, and the actual number of times of the 3 rd ball hit was (N3-N2)/8+ (N2-N1)/9+ N1/10;
then the average number of failures N of 3 balls is [ N1/10+ (N2-N1)/9+ N1/10+ (N3-N2)/8+ (N2-N1)/9+ N1/10]/3
After simplification
Wherein, the average impact fatigue life of the N-ceramic ball is one time; n is a radical ofi-impact fatigue life/time of the ith ceramic ball; when data is processed, it is smallThe number part takes an integer value according to the GB/T8170 numerical value reduction rule.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, but also covers other embodiments formed by any combination of the above-mentioned features or their equivalents without departing from the spirit of the present invention. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. A ceramic ball impact fatigue life testing machine is characterized by comprising
The lifting transmission device is provided with a transmission belt and a lifting bucket arranged on the transmission belt;
the ball inlet and the ball outlet are arranged on the shell, and the ball outlet is positioned below the ball inlet;
the collision plate is arranged between the ball inlet and the ball outlet;
the ball inlet and the ball delivery port are arranged on the lifting transmission device;
the first conveying assembly is used for receiving the ceramic balls from the ball outlet and transferring the ceramic balls to the ball inlet, and the ceramic balls enter the lifting bucket through the ball inlet;
and one end of the second conveying assembly extends into the ball feeding port and is used for receiving the ceramic balls from the elevator bucket and conveying the ceramic balls to the ball feeding port.
2. The ceramic ball impact fatigue life tester of claim 1, wherein the elevator bucket comprises:
the bottom plate is connected with the conveying belt, and the side plates are arranged on the bottom plate oppositely;
one end of the side plate is connected through a ball receiving plate, and the other end of the side plate is connected through a ball guide plate;
the ball storage space is enclosed by the bottom plate, the side plates, the ball receiving plate and the ball guide plate, the included angle between the ball receiving plate and the bottom plate is 60-85 degrees, and the included angle between the ball guide plate and the bottom plate is not less than 140 degrees.
3. The ceramic ball impact fatigue life tester of claim 2, wherein the ball receiving plate and the ball guide plate of the adjacent elevator buckets are in contact.
4. The ceramic ball impact resistance fatigue life testing machine of claim 1, wherein the ball outlet is provided with a hollow closed disc, a turntable is arranged in the disc, the turntable is controlled by a motor to rotate at a constant speed, and the turntable is provided with a plurality of accelerating channels;
and a ceramic ball outlet is arranged right above the collision plate relative to the disc, and when the ceramic balls reach the ceramic ball outlet, the linear velocity and the acceleration direction are both vertically downward.
5. The impact fatigue life tester for ceramic balls according to claim 1, wherein a screening device is arranged between the first conveying assembly and the ball inlet, the screening device comprises a conveying channel, the conveying channel comprises a screen plate consisting of a plurality of connecting rods, one end of the screen plate is connected with a ball inlet area, the ball inlet area is used for receiving the ceramic balls from the first conveying assembly, the other end of the screen plate is connected with a ball outlet area, and the ball outlet area is used for sending the ceramic balls into the ball inlet.
6. The impact fatigue life tester of claim 5, wherein the distance between the connecting rods is adjustable according to the grain size of the ceramic ball.
7. The impact fatigue life tester of claim 1, wherein the first conveying assembly comprises a lower conveying belt and a down-conversion motor, the ceramic ball is located at a middle portion of the lower conveying belt, and the down-conversion motor can control the lower conveying belt to convey the ceramic ball in a forward direction or a reverse direction.
8. The ceramic ball impact fatigue life tester of claim 7, wherein a protective cover is arranged outside the lower transmission band, and the width of the protective cover is gradually reduced from one end of the ball outlet to the other end of the ball outlet.
9. The ceramic ball impact fatigue life tester of claim 1, further comprising a control system, wherein the lifting transmission device, the first transmission assembly and the second transmission assembly are in signal connection with the control system.
10. The ceramic ball impact fatigue life testing machine of claim 9, wherein the control system is configured with a touch screen control operation panel, a frequency converter, an encoder, a PLC host, an expansion unit, an analog input unit, a transformer, a filter, directly programmable input parameters, and controls the transmission speed and/or the ball feeding speed and/or the impact speed of the ceramic ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020633586.6U CN212206940U (en) | 2020-04-24 | 2020-04-24 | Impact-resistant fatigue life testing machine for ceramic balls |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020633586.6U CN212206940U (en) | 2020-04-24 | 2020-04-24 | Impact-resistant fatigue life testing machine for ceramic balls |
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| Publication Number | Publication Date |
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| CN212206940U true CN212206940U (en) | 2020-12-22 |
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| CN202020633586.6U Active CN212206940U (en) | 2020-04-24 | 2020-04-24 | Impact-resistant fatigue life testing machine for ceramic balls |
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- 2020-04-24 CN CN202020633586.6U patent/CN212206940U/en active Active
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