CN111398070A - Ceramic ball impact-resistant breakage rate testing machine and testing method - Google Patents
Ceramic ball impact-resistant breakage rate testing machine and testing method Download PDFInfo
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- CN111398070A CN111398070A CN202010330856.0A CN202010330856A CN111398070A CN 111398070 A CN111398070 A CN 111398070A CN 202010330856 A CN202010330856 A CN 202010330856A CN 111398070 A CN111398070 A CN 111398070A
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/303—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated only by free-falling weight
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
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- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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- G01N2203/0208—Specific programs of loading, e.g. incremental loading or pre-loading
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N2203/02—Details not specific for a particular testing method
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- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
The invention discloses a ceramic ball impact-resistant breakage rate testing machine and a testing method, wherein the ceramic ball impact-resistant breakage rate testing machine comprises a ball selector; the ball inlet and the ball outlet are arranged on the ball selector; the collision pool is positioned below the ball selector, and the ceramic balls fall into the collision pool through a ball outlet; the conveying assembly is used for receiving the ceramic balls from the collision pool, one end of the conveying assembly is close to the ball selector, and the conveying assembly transfers the ceramic balls to the direction of the ball selector or transfers the ceramic balls to the opposite direction of the ball selector according to instructions; the conveying assembly is provided with a screening device, and the screening device is positioned between a falling point for bearing the ceramic balls and the ball selector and is used for screening out the ceramic balls with the minimum grain size smaller than a preset value. The breaking rate index of the ceramic grinding body can be estimated in advance to guide the production and use of customers.
Description
Technical Field
The invention relates to the field of impact resistance of ceramic balls, in particular to a ceramic ball impact resistance breakage rate testing machine and a testing method.
Background
Although the advantages of the ceramic material are incomparable with other materials, the fatal weakness is obvious, namely the brittleness, which greatly influences the reliability and consistency of the material performance, and the characteristics also appear on the wear-resistant ceramic balls, wherein the brittleness is a main factor causing the grinding body to be broken, and the ceramic balls for cement grinding cannot be sufficient due to the relatively harsh use environment and working condition.
In order to ensure that the performance of the ceramic balls can meet the working condition of cement grinding, a special wear-resistant ceramic product must be found, equipment for detecting the breaking rate of a ceramic ball grinding body does not exist at present, users generally compare the quantity before loading and grinding with the quantity after grinding to calculate the breaking rate, the experimental period is long, about 40-60 days, and the quality of the ceramic balls cannot be judged in advance, so that the quality of the ceramic balls is detected and evaluated to estimate the breaking rate index of the ceramic balls in advance, and customers are guided to produce and use, and the ceramic ball grinding machine becomes one of the difficult problems which need to be solved jointly in the ceramic ball industry and the cement industry.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a ceramic ball impact-resistant breakage rate testing machine and a testing method.
According to an aspect of the present invention, there is provided a ceramic ball impact breakage tester including:
a ball selector;
the ball inlet and the ball outlet are arranged on the ball selector;
the collision pool is positioned below the ball selector, and the ceramic balls fall into the collision pool through a ball outlet;
the conveying assembly is used for receiving the ceramic balls from the collision pool, one end of the conveying assembly is close to the ball selector, and the conveying assembly transfers the ceramic balls to the direction of the ball selector or transfers the ceramic balls to the opposite direction of the ball selector according to instructions;
the conveying assembly is provided with a screening device, and the screening device is positioned between a falling point for bearing the ceramic balls and the ball selector and is used for screening out the ceramic balls with the minimum grain size smaller than a preset value.
Further, the conveying assembly comprises a lower conveying device, an upper conveying device and a lifting conveying device, wherein the lifting conveying device is provided with a conveying belt and a lifting hopper arranged on the conveying belt;
a ball inlet and a ball delivery port which are arranged on the lifting transmission device,
the lower conveying device is used for receiving the ceramic balls from the collision pool 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 upper conveying device 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 falling point of ceramic ball is located the middle part of transmission device down, transmission device can be with ceramic ball to positive direction or reverse direction transmission down, transmission device's one end is provided with promotes transmission device down, it is used for transmitting ceramic ball to transmission device to promote transmission device, and last transmission device 7 transmits ceramic ball to the ball selection ware.
Further, the screening device is positioned between the lower conveying device and the lifting conveying device, or the screening device is positioned between the lifting conveying device and the lower conveying device;
the screening device comprises a transmission channel, the transmission channel comprises a sieve plate consisting of a plurality of metal rectangular bars, one end of the sieve plate is connected with a ball inlet area, the ball inlet area is used for receiving ceramic balls from a lower transmission device, the other end of the sieve plate is connected with a ball outlet area, and the ball outlet area is used for sending the ceramic balls into a ball inlet.
Further, a bottom plate is connected with the conveying belt, and side plates are oppositely arranged on the bottom plate;
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.
Furthermore, the ball selector comprises a ball selecting chassis, and a container for receiving ceramic balls and a power mechanism for driving the container to rotate are arranged on the ball selecting chassis;
the ball selecting chassis is provided with a ball selecting hole, the container rotates to enable the ball inlet to coincide with the ball selecting hole, and the ceramic ball falls into the collision pool through the ball inlet and the ball selecting hole.
Further, a ceramic ball accelerating mechanism is arranged between the ball selecting chassis and the collision pool, the ceramic ball accelerating mechanism comprises a hollow closed disc, a rotary disc is arranged in the disc, the center of the rotary disc is communicated with a ball outlet, and the rotary disc is controlled by a motor to rotate at a constant speed;
the rotary table is provided with a plurality of accelerating channels, the disc is relatively positioned right above the collision pool and is provided with a ceramic ball outlet, and when the ceramic balls reach the ceramic ball outlet, the linear velocity and the direction of acceleration are both vertical and downward.
Furthermore, the device also comprises a control system, and the ball selector and the transmission assembly 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 P L C host, an expansion unit, an analog input unit, a transformer and a filter, and parameters can be directly programmed and input to control the transmission speed and/or the ball-entering speed and/or the impact speed of the ceramic balls, wherein the ball-entering speed refers to the speed of the ceramic balls entering the collision pool from the ball selector.
According to one aspect of the present invention, there is provided a ceramic ball impact breakage resistance test method, comprising the steps of,
comprises the following steps of (a) carrying out,
selecting a plurality of ceramic balls to fill the collision pool, weighing, and recording as m0；
Selecting a plurality of ceramic balls, loading the ceramic balls into a ball selector, weighing the ceramic balls and recording the weight as m1；
Circularly feeding the ceramic balls in the ball selector into the collision pool, enabling the ball feeding speed of the ball selector per minute to be 1 +/-0.05 kg/min, and controlling the speed of the ceramic balls to be 8.90 +/-0.05 m/s to vertically fall into the collision pool;
collecting undamaged ceramic balls, weighing and recording as m2The damage of the ceramic ball comprises the following conditions: the size of a stripping layer on the surface of the grinding ball is more than 50% of the diameter of the grinding body, or the mass loss rate of the grinding ball is more than 20%, or the grinding ball is broken along the middle part;
the impact time of the pottery ball is t according to m0、m1、m2And t, calculating the breaking rate of the ceramic balls.
Compared with the prior art, the beneficial effect of this application lies in:
1. the ceramic grinding body breakage rate detection method can detect the breakage rate of the ceramic grinding body before a customer purchases the ceramic grinding body, can evaluate the breakage rate of the ceramic grinding body in advance, can also estimate the breakage rate index of the ceramic grinding body in advance, guides the production and use of the customer, promotes the development of the ceramic ball industry to the aspects of high strength, high wear resistance and high impact toughness, and promotes the common progress of the ceramic grinding body industry and the cement industry.
2. The conveying assembly comprises a lower conveying device, an upper conveying device and a lifting conveying device, so that the whole test process can be automated, and the middle part does not need to be operated by personnel. The operability is relatively strong. .
3. The turntable is provided with a plurality of accelerating channels, so that the ceramic balls can fall at any speed when being thrown out at any height.
4. According to the invention, the bottom plate, the side plates, the ball receiving plate and the ball guide plate of the elevator bucket enclose a ball storage space, the included angle between the ball receiving plate and the bottom plate is 60-85 degrees, the included angle between the ball guide plate and the bottom plate is not less than 140 degrees, the 60-85 degrees can ensure that ceramic balls can be successfully received when falling into the elevator bucket, and the ceramic balls can be smoothly poured when the included angle at the top end is not less than 140 degrees and overturned; 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
5. The ceramic ball impact-resistant breakage rate test method simulates the most harsh impact process of the ceramic ball in a ball mill, namely, the ceramic ball is continuously thrown down from a certain height and is impacted on a collision plate repeatedly for a plurality of times, and the impact fatigue failure (ceramic ball breakage) times reflect the impact fatigue life of the ceramic ball under the condition.
Drawings
Fig. 1 is a first structural schematic diagram of the present invention.
Fig. 2 is a second structural schematic diagram of the present invention.
FIG. 3 is a block diagram of a control system according to the present invention.
FIG. 4 is a control diagram of the control system of the present invention.
Fig. 5 is a schematic structural view of the ceramic ball acceleration mechanism of the present invention.
Fig. 6 is a schematic structural diagram of a lower transmission device according to the present invention.
FIG. 7 is a schematic structural diagram of a screening apparatus according to the present invention.
Fig. 8 is a schematic structural diagram of a lifting and conveying device according to the present invention.
Fig. 9 is a schematic view of the structure of the bucket.
Fig. 10 is a schematic structural view of the ball selector.
Reference numerals shown in the drawings: 1-a control system; 2-ceramic ball acceleration mechanism; 21-a collision cell; 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 lower transport device; 5-a screening device; 51-sieve plate; 52-goal area; 53-ball out zone; 6-lifting the conveying device; 7-an upper transmission device; 8-a ball selector; 81-ball selecting chassis; 82-a container; 83-a power mechanism; 84-ball selection hole; 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 breakage rate testing machine, includes:
the ceramic ball separator 8 is arranged at a ball inlet 27 and a ball outlet 3 on the ball separator 8, and the collision pool 21 is positioned below the ball separator 8, and the ceramic balls 10 fall into the collision pool 21 from the ball outlet 3; the ball selector 8 comprises a ball selecting chassis 81, a container 82 for receiving the ceramic balls 10 and a power mechanism 83 for driving the container 82 to rotate are arranged on the ball selecting chassis 81, the inlet of the container is the ball inlet 27 of the ball selector 8, the power mechanism 83 is a variable frequency motor 26, and for the convenience of distinguishing and naming the variable frequency motor 26, the driving mode can adopt common transmission modes such as gears or belts; the ball selecting chassis 81 is provided with a ball selecting hole 84, the container 82 rotates to enable the ball outlet 3 to coincide with the ball selecting hole 84, the ceramic balls 10 fall into the collision pool 21 through the ball outlet 3 and the ball selecting hole 84, the ball selecting device 8 consists of the ball selecting chassis 81 and the variable frequency motor 26, and the ball selecting device 8 is used for separating the balls one by one, so that not only can a plurality of balls be prevented from simultaneously entering an accelerating system to cause extrusion damage of the ceramic balls 10 and equipment at the ceramic ball outlet 25, but also the effect of controlling the ball entering speed is achieved; as shown in fig. 10, the ball outlets 3 are arranged in the ball selection chassis 81 in an annular array, and the ball selector 8 can separate the ceramic balls 10 and send the separated ceramic balls into the ball selection chassis 81 one by one, so as to prevent a plurality of balls from entering the acceleration system at the same time and causing congestion or causing potential safety hazard due to shearing at the rear of the accelerator. As an alternative, a ceramic ball acceleration mechanism 2 is arranged between the ball selection chassis 81 and the collision pool 21, the ceramic ball acceleration mechanism 2 comprises a hollow closed disc 22, a rotary disc 23 is arranged in the disc 22, the center of the rotary disc 23 is communicated with a ball selection hole 84, and the rotary disc 23 is controlled by a motor 26 to rotate at a constant speed; the rotary table 23 is provided with a plurality of accelerating channels 24, the disc 22 is relatively positioned right above the collision pool 21 and is provided with a ceramic ball outlet 25, and when the ceramic balls 10 reach the ceramic ball outlet 25, the linear velocity and the direction of acceleration are both vertical and downward. The design has the advantages that the ceramic ball 10 is accelerated from 0, the problem that the ceramic ball 10 collides with the rotary table 23 in the acceleration process does not exist (if the ceramic ball 10 directly collides with the rotary table 23 after entering an acceleration system, the ceramic ball 10 cannot be accelerated), the speed of the rotary table 23 is controllable, the ceramic ball 10 is input from the middle of the acceleration rotary table 23, the process from rest to acceleration of the ceramic ball 10 is realized through the acceleration of the rotary table 23, the automation is realized in the whole process, the output speed of the ceramic ball 10 can be controlled at will, the speed of the thrown ceramic ball 10 is controllable, the running time between each acceleration channel 24 is controllable, and the throwing direction of the ceramic ball 10 is consistent and controllable; the rotary table 23 is controlled to rotate through the variable frequency motor to perform uniform-speed circular motion, the collision pool 21 is arranged below the rotary table 23 in the centrifugal direction, the disc 22 is arranged right above the collision pool 21 relatively, the ceramic ball outlet 25 is arranged, when the ceramic balls 10 reach the ceramic ball outlet 25, the linear velocity and the acceleration are vertical and downward, and the collision pool 21 is just positioned at the position where the ceramic balls 10 fly out along the tangent line of the outlet 25, so that direct collision can be realized.
The conveying component is used for receiving the ceramic balls 10 from the collision pool 21, one end of the conveying component is close to the ball selector 8, and the conveying component transfers the ceramic balls 10 to the direction of the ball selector 8 or transfers the ceramic balls 10 to the direction opposite to the ball selector 8 according to instructions; specifically, the conveying assembly comprises a lower conveying device 4, an upper conveying device 7 and a lifting conveying device 6, wherein the lifting conveying device 6 is provided with a conveying belt and a lifting hopper 9 arranged on the conveying belt, and further comprises a ball inlet and a ball delivery port arranged on the lifting conveying device 6; the higher end of the conveying belt is close to the ball selector 8, the lower end of the conveying belt is close to the lower conveying device 4, and the conveying belt is driven by a lifting motor; said lift bucket 9, comprising: the bottom plate is connected with the transmission belt, and the side plates 91 are oppositely arranged on the bottom plate; one end of the side plate 91 is connected through a ball receiving plate 92, and the other end of the side plate 91 is connected through a ball guide plate 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, and the included angle between the ball guide plate 93 and the bottom plate is not less than 140 degrees.
The lower transmission device 4 consists of a lower transmission belt and a lower frequency conversion motor and is used for receiving the ceramic balls 10 from the collision pool 21 and transferring the ceramic balls 10 to a ball inlet, and the ceramic balls 10 enter the lifting bucket 9 through the ball inlet; the falling point of ceramic ball 10 is located the middle part of transmission device 4 down, transmission device 4 can be with ceramic ball 10 to positive direction or reverse direction transmission down, promote transmission device 6 and be located the one end that transmission device 4 positive direction was transmitted down, it is used for transmitting ceramic ball 10 to last transmission device 7 to promote transmission device 6, as shown in fig. 6, in order to prevent that ceramic ball from scattering, can use the shell will descend the transmission band to cover. The upper conveying device 7 conveys the ceramic balls 10 to the ball selector 8, and as an alternative, a recovery hopper is arranged at the other end of the lower conveying device 4, and the ceramic balls 10 are conveyed in the reverse direction to convey the ceramic balls 10 to the recovery hopper.
And the upper transmission device 7 consists of an upper transmission belt and an upper variable frequency motor, one end of the upper transmission device 7 extends into the ball feeding port and is used for receiving the ceramic balls 10 from the lifting bucket 9 and conveying the ceramic balls 10 to the ball feeding port 27.
A screening device 5 is arranged between a falling point of the conveying assembly, which is used for receiving the ceramic balls 10, and the ball selector 8 and is used for screening out the ceramic balls 10 with the minimum particle size smaller than a preset value, wherein the screening device 5 is arranged between the lower conveying device 4 and the lifting conveying device 6, or the screening device 5 is arranged between the lifting conveying device 6 and the lower conveying device 4, and the former is adopted in the embodiment; the screening device 5 comprises a transmission channel, the transmission channel comprises a screen plate 51 consisting of a plurality of metal rectangular bars, one end of the screen plate 51 is connected with a ball inlet area 52, the ball inlet area 52 is used for receiving the ceramic balls 10 from the lower transmission device 4, the other end of the screen plate 51 is connected with a ball outlet area 53, and the ball outlet area 53 is used for sending the ceramic balls 10 into a ball inlet.
As shown in fig. 3-4, the ceramic ball separator further includes a control system 1, the ball separator 8 and the transmission assembly are in signal connection with the control system 1, the control system 1 is configured with a touch screen control operation panel, a frequency converter, an encoder, a P L C host, an expansion unit, an analog input unit, a transformer and a filter, wherein the motor 26, the hoisting motor 26, the up-conversion motor 26, the down-conversion motor 26 and the ball separation motor 26 are collectively referred to as a mechanical and power unit, input parameters can be directly programmed, the mechanical and power unit is controlled, the transmission speed of the ceramic balls 10 and the ball feeding speed of the ball separator 8 are controlled, the speed at which the ceramic balls 10 are thrown out of the ceramic ball outlet 25 can be changed by changing the rotation speed of the turntable 23, in the test, the falling speed of the ceramic balls 10 is controlled to be 8.90 ± 0.05m/s, the ball feeding speed of the ceramic balls 10 can be changed by changing the rotation speed of the ball separator 8, the ceramic balls are fed into the collision pool for collision, and the damaged ceramic balls are screened out after collision through the transmission assembly and the screening device, and the ceramic balls sequentially enter the selection.
The embodiment provides a test method applying the ceramic ball impact breakage rate tester, which comprises the following steps,
step 1: selecting a plurality of ceramic balls to fill the collision pool, using the ceramic balls as an alternative, hanging the collision pool flat by a scraper, taking out and weighing, and recording the weight as m0；
Step 2: selecting a plurality of ceramic balls, loading the ceramic balls into a ball selector, weighing the ceramic balls and recording the weight as m1；
And step 3: circularly feeding the ceramic balls in the ball selector into the collision pool, so that the ball feeding speed of the ball selector per minute is 1 +/-0.05 kg/min, namely, the number of the ceramic balls fed into the collision pool by the ball selector per minute is controlled according to the average mass of the ceramic balls, and particularly, according to the embodiment, the rotating speed of the container is controlled according to the average mass of the selected ceramic balls and the number of ball selecting holes; simultaneously, the speed of the ceramic balls is controlled to be 8.90 +/-0.05 m/s, and the ceramic balls vertically fall into a collision pool;
and 4, step 4: undamaged ceramic balls (i.e., intact ceramic balls) are collected and weighed, and are recorded as m2The damage of the ceramic ball comprises the following conditions: the size of a stripping layer on the surface of the grinding ball is more than 50% of the diameter of the grinding body, or the mass loss rate of the grinding ball is more than 20%, or the grinding ball is broken along the middle part;
the impact time of the pottery ball is t according to m0、m1、m2T calculating the breaking rate of the ceramic balls, specifically, the breaking rate of the alumina ceramic grinding balls is determined according to a formula (D-1):
in the formula D-1:
the breaking rate of the P-ceramic balls is h-1;
t-testing machine running time, h;
m0-the mass of the impacted ball in the impact basin, g;
m1-test impact ball mass, g;
m2-the finished ceramic ball mass after the test, g;
the implementation takes the ceramic ball as an example to provide a implementation experiment, and the test steps comprise:
the collision cell of the tester was filled with prepared ceramic grinding balls and leveled with a squeegee to give an impacted sample, which was weighed to have a mass m with a 0.1g precision balance0。
Weighing prepared ceramic grinding ball m1(about 5kg) as an impact sample for testing, charged into a ball hopper;
turning on a power switch of the testing machine, starting a lower conveying belt reverse rotation button, and recovering redundant balls in the conveying belt;
adjusting the parameters of the motor to ensure that the ball throwing linear speed of the turntable is 8.90 +/-0.05 m/s;
adjusting parameters of a ball selecting motor to enable the ball sending speed of the ball selector per minute to be 1 +/-0.05 kg/min;
sending the balls into a ceramic ball accelerating mechanism through a ball selector, carrying out a collision test, and setting the equipment running time to be 1 h;
after the test is finished, the ceramic balls are conveyed in the reverse direction to be conveyed to a recovery hopper, the ceramic balls in the collision pool and the ceramic balls in the recovery hopper are taken out to be mixed, and the mass m of the selected grinding balls is weighed2；
As a result, the breakage rate of the alumina ceramic grinding balls was determined according to the formula (D-1):
during data processing, the decimal part takes 2-bit effective digits according to the GB/T8170 numerical value reduction rule, for example, the mass m of the impacted ball in the impact pool at the beginning04302.20g, the running time of the device is 1h, and the mass m of the impact ball for the test is15006.60g, the intact ceramic ball after testing is m29272.60g, the impact-resistant breaking rate P of the ceramic ball is (5006.60+4302.20-92720.6)/5006.60g is 0.72%, and the breaking rate detection of the ceramic grinding body can be carried out before the ceramic grinding body is purchased by a customerThe ceramic grinding body can be evaluated in advance, the breakage index of the ceramic grinding body can be estimated in advance, the production and the use of customers are guided, the development of the ceramic ball industry to the aspects of high strength, high wear resistance and high impact toughness is promoted, and the joint progress of the ceramic grinding body industry and the cement industry is promoted.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. 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-resistant breakage rate testing machine is characterized by comprising
A ball selector;
the ball inlet and the ball outlet are arranged on the ball selector;
the collision pool is positioned below the ball selector, and the ceramic balls fall into the collision pool through a ball outlet;
the conveying assembly is used for receiving the ceramic balls from the collision pool, one end of the conveying assembly is close to the ball selector, and the conveying assembly transfers the ceramic balls to the direction of the ball selector or transfers the ceramic balls to the opposite direction of the ball selector according to instructions;
the conveying assembly is provided with a screening device, and the screening device is positioned between a falling point for bearing the ceramic balls and the ball selector and is used for screening out the ceramic balls with the minimum grain size smaller than a preset value.
2. The ceramic ball impact breakage tester of claim 1, wherein the conveying assembly includes a lower conveying device, an upper conveying device, and a lifting conveying device, the lifting conveying device being provided with a conveyor belt and a lifting bucket disposed on the conveyor belt;
a ball inlet and a ball delivery port which are arranged on the lifting transmission device,
the lower conveying device is used for receiving the ceramic balls from the collision pool 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 upper conveying device 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.
3. The ceramic ball impact breakage tester of claim 2 wherein the ceramic ball drop point is located in the middle of a lower transport device that can transport ceramic balls in a forward or reverse direction, the lower transport device having a lifting transport device at one end for transporting ceramic balls to an upper transport device that transports ceramic balls to the ball selector.
4. The ceramic ball impact breakage tester of claim 2 wherein the screening device is located between the lower transport device and the lifting transport device or the screening device is located between the lifting transport device and the lower transport device;
the screening device comprises a transmission channel, the transmission channel comprises a sieve plate consisting of a plurality of metal rectangular bars, one end of the sieve plate is connected with a ball inlet area, the ball inlet area is used for receiving ceramic balls from a lower transmission device, the other end of the sieve plate is connected with a ball outlet area, and the ball outlet area is used for sending the ceramic balls into a ball inlet.
5. The ceramic ball impact breakage 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.
6. The ceramic ball impact-resistant breakage rate testing machine of claim 1, wherein the ball selector comprises a ball selecting chassis, and a container for receiving the ceramic balls and a power mechanism for driving the container to rotate are arranged on the ball selecting chassis;
the ball selecting chassis is provided with a ball selecting hole, the container rotates to enable the ball inlet to coincide with the ball selecting hole, and the ceramic ball falls into the collision pool through the ball inlet and the ball selecting hole.
7. The ceramic ball impact-resistant breakage rate testing machine of claim 6, wherein a ceramic ball acceleration mechanism is arranged between the ball selection chassis and the collision pool, the ceramic ball acceleration mechanism comprises a hollow closed disc, a rotary disc is arranged in the disc, the center of the rotary disc is communicated with a ball outlet, and the rotary disc is controlled by a motor to rotate at a constant speed;
the rotary table is provided with a plurality of accelerating channels, the disc is relatively positioned right above the collision pool and is provided with a ceramic ball outlet, and when the ceramic balls reach the ceramic ball outlet, the linear velocity and the direction of acceleration are both vertical and downward.
8. The ceramic ball impact breakage tester of claim 1 further comprising a control system, wherein the ball selector and the transmission assembly are in signal connection with the control system.
9. The ceramic ball impact breakage tester of claim 8 wherein the control system is configured with a touch screen control panel, a transducer, an encoder, a P L C host, an expansion unit, an analog input unit, a transformer, a filter, directly programmable input parameters, control of ceramic ball transmission speed and/or ball entry speed and/or impact speed.
10. A ceramic ball impact-resistant breakage rate test method is characterized by comprising the following steps,
selecting a plurality of ceramic balls to fill the collision pool, weighing, and recording as m0；
Selecting a plurality of ceramic balls, loading the ceramic balls into a ball selector, weighing the ceramic balls and recording the weight as m1；
Circularly feeding the ceramic balls in the ball selector into the collision pool, enabling the ball feeding speed of the ball selector per minute to be 1 +/-0.05 kg/min, and controlling the speed of the ceramic balls to be 8.90 +/-0.05 m/s to vertically fall into the collision pool;
collecting undamaged ceramic balls, weighing and recording as m2The damage of the ceramic ball comprises the following conditions: the size of a stripping layer on the surface of the grinding ball is more than 50% of the diameter of the grinding body, or the mass loss rate of the grinding ball is more than 20%, or the grinding ball is broken along the middle part;
the impact time of the pottery ball is t according to m0、m1、m2And t, calculating the breaking rate of the ceramic balls.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112378613A (en) * | 2021-01-18 | 2021-02-19 | 江西江铃集团奥威汽车零部件有限公司 | Device for detecting performance of automobile engine baffle |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112378613A (en) * | 2021-01-18 | 2021-02-19 | 江西江铃集团奥威汽车零部件有限公司 | Device for detecting performance of automobile engine baffle |
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