Cone crusher speed change and yield increase control system based on layered crushing theory

Abstract

The invention discloses a variable-speed and yield-increasing control system for a cone crusher based on a layered crushing theory, the cone crusher comprises an upper rack assembly, a lower rack assembly and a main shaft assembly, and the variable-speed and yield-increasing control system comprises: an analysis module; the speed change module is in transmission connection with the main shaft assembly, is in signal connection with the analysis module and is used for controlling the rotating speed of the main shaft; the coordinate acquisition unit is used for acquiring the position information of the upper rack assembly and the position information of the main shaft assembly and is in signal connection with the analysis module; and the yield correction module is used for collecting yield information of the cone crusher and is in signal connection with the analysis module. The invention provides a control method of a cone crusher. According to an algorithm set by an analysis module, the cone crusher can obtain the optimal rotating speed when the cone crusher is in different cavity shapes and eccentric distances.

Description

Technical Field

[0001] The invention belongs to the technical field of crushers, and in particular relates to a cone crusher variable speed and increased production control system based on layered crushing theory. Background Art

[0002] Cone crushers are widely used in various mines. The control methods used by most cone crushers in field applications often use purely logical relationships without advanced algorithms, resulting in low adjustment efficiency.

[0003] As a high-precision output prediction method for cone crushers, the layered crushing theory is mainly used for cone crusher design and selection. There are no reports on its use in cone crusher production control. Currently, there are no cone crushers on the market that use the layered characteristic theory algorithm to optimize the speed in the control system.

[0004] According to the research on layered crushing theory, the output of cone crusher is affected by the rotation speed under the same working condition. Each combination of eccentricity and cavity type has an optimal rotation speed with maximum output. However, most cone crushers now use a constant rotation speed and cannot achieve maximum output under various combinations of eccentricity and cavity type. Summary of the invention

[0005] Aiming at the technical problem that the crusher in the prior art cannot adapt to the change of rotation speed according to the cavity type and eccentricity to obtain the best production capacity, a cone crusher variable speed and increased production control system based on the layered crushing theory is provided.

[0006] A variable speed and increased production control system for a cone crusher based on the layered crushing theory, the cone crusher comprises an upper frame assembly, a lower frame assembly and a main shaft assembly, and is characterized in that:

[0007] The variable speed production increase control system comprises:

[0008] Analysis module;

[0009] A speed change module, which is in driving connection with the spindle assembly and is signal-connected with the analysis module, and is used to control the speed of the spindle;

[0010] A coordinate acquisition unit, used for acquiring the position information of the upper frame assembly and the position information of the spindle assembly and connected with the analysis module signal;

[0011] The output correction module is used to collect the output information of the cone crusher and is connected to the analysis module signal.

[0012] Furthermore, the upper frame assembly is provided with a positionable moving cone liner, the main shaft assembly is provided with a positionable fixed cone liner, and the coordinate acquisition unit acquires position information of the moving cone liner and the fixed cone liner.

[0013] Furthermore, the speed change module includes the following modules in a serial structure:

[0014] Input interface;

[0015] D / A converter;

[0016] Frequency converter;

[0017] A power unit, used to control the rotation speed of the crusher;

[0018] A / D converter;

[0019] The output interface is electrically connected to the analysis module.

[0020] Furthermore, the analysis module includes the following modules composed of a serial structure:

[0021] Input module, used to input relevant parameters;

[0022] The pre-processing module obtains the coordinate data of the fixed cone and the moving cone in the global coordinate system based on the input parameter information of the input module;

[0023] The numerical calculation module obtains the productivity, specifically: according to the minimum cross-sectional area criterion, the minimum blocking point position is estimated and the cross-sectional geometric information of the blocking point section is obtained; according to the productivity estimation formula, the basic parameters and the blocking point cross-sectional information are substituted into the formula and numerically integrated to obtain the productivity value;

[0024] Post-processing module: optimize the productivity obtained by the numerical calculation module to find the maximum productivity and its corresponding speed value;

[0025] An output module, wherein the output module comprises a rotation speed output module and the result display module.

[0026] Furthermore,

[0027] The yield correction module comprises:

[0028] Discharging angle belt machine;

[0029] Electronic belt scale;

[0030] A / D converter;

[0031] Output interface.

[0032] Furthermore, the coordinate acquisition unit includes:

[0033] Suspension point acquisition unit;

[0034] Moving cone collection unit;

[0035] Fixed cone collection unit;

[0036] A / D converter;

[0037] Output interface.

[0038] Furthermore, the pre-processing module includes a coordinate transformation submodule, a gear transformation eccentricity submodule, a speed input submodule and a volume filling rate calibration submodule; the coordinate transformation submodule includes a blocking layer position calculation submodule, a blocking layer area calculation submodule, an upper camber speed calculation submodule and a falling speed calculation submodule; the numerical calculation module includes a yield calculation submodule; the post-processing module includes a speed-yield relationship submodule and an optimal speed calculation submodule, and the output module includes a speed output module and a result display module.

[0039] The positive and progressive effects of the present invention are:

[0040] The invention provides a control method for a cone crusher. By using an algorithm set by an analysis module, the cone crusher can obtain an optimal rotation speed when it is in different cavity shapes and eccentric distances. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of the cone crusher in the present invention.

[0042] Figure 2 It is a schematic diagram of the structure of the positionable moving cone liner described in the present invention.

[0043] Figure 3 It is a schematic diagram of the structure of the positionable fixed cone liner of the present invention.

[0044] Figure 4 It is the position relationship between the front moving cone liner and the fixed cone liner used by the coordinate acquisition unit.

[0045] Figure 5 It is a schematic diagram of the eccentric copper sleeve keyway.

[0046] Figure 6 It is a schematic diagram of the coordinate acquisition unit structure. DETAILED DESCRIPTION

[0047] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0048] Reference Figure 1 to Figure 6A variable speed and increased production control system for a cone crusher based on the layered crushing theory, the cone crusher comprises an upper frame assembly, a lower frame assembly and a main shaft assembly, and is characterized in that:

[0049] The variable speed production increase control system comprises:

[0050] Analysis module;

[0051] A speed change module, which is in driving connection with the spindle assembly and is signal-connected with the analysis module, and is used to control the speed of the spindle;

[0052] A coordinate acquisition unit, used for acquiring the position information of the upper frame assembly and the position information of the spindle assembly and connected with the analysis module signal;

[0053] The output correction module is used to collect the output information of the cone crusher and is connected to the analysis module signal.

[0054] Specifically, Figure 1 As shown, the cone crusher is composed of an upper frame assembly 1, a lower frame assembly 2, a main shaft assembly 3, a speed change module 4, an analysis module 5, a production correction module 6, and a coordinate acquisition unit 7. The upper frame assembly 1 includes an edge-locatable fixed cone liner 11; the main shaft assembly 3 includes an edge-locatable moving cone liner 31 and an eccentric copper sleeve.

[0055] The speed change module 4 is composed of a power unit, a speed sensor, an A / D converter, an output interface, a frequency converter, a D / A converter and an input interface. The input interface is connected to the D / A converter, the D / A converter is connected to the frequency converter, the frequency converter controls the power unit, a speed sensor is provided on the power unit, the speed sensor is connected to the A / D converter, and the A / D converter is connected to the output interface.

[0056] The analysis module 5 is composed of an input module, a pre-processing module, a numerical calculation module, a post-processing module, and an output module.

[0057] Furthermore, in one example, the input module includes an eccentricity gear input module, a rotation speed signal interface, a belt lining signal interface and a fixed cone and moving cone coordinate signal interface.

[0058] The pre-processing module consists of a coordinate transformation submodule, a gear transformation eccentricity submodule, a speed input submodule and a volume filling rate calibration submodule; the coordinate transformation submodule includes a blocking layer position calculation submodule, a blocking layer area calculation submodule, an upper camber speed calculation submodule and a falling speed calculation submodule; the numerical calculation module includes a yield calculation submodule; the post-processing module includes a speed-yield relationship submodule and an optimal speed calculation submodule, and the output module includes a speed output module and a result display module.

[0059] The output correction module 6 includes a discharging belt conveyor, an electronic belt scale, an A / D converter and an output interface.

[0060] The coordinate acquisition unit 7 includes a suspension point acquisition unit, a moving cone acquisition unit, a fixed cone acquisition unit, an A / D converter, and an output interface 75 .

[0061] The suspension point acquisition unit is installed at the top of the middle part of the upper frame assembly 1, and is used to output the origin coordinate O. The dynamic cone acquisition unit is installed on the edge-positionable dynamic cone liner 31, and is used to collect the fixed cone profile curve coordinates (X Mi , Y Mi The fixed cone collection unit is installed on the edge of the fixed cone liner 11, which is used to collect the coordinates of the moving cone profile (X Ci , Y Ci ).

[0062] In one example, the upper frame assembly 1 and the lower frame assembly 2 are installed by flange bolt connection; the main shaft assembly 3 and the lower frame assembly 2 are installed by flange bolt connection. The transmission relationship between the speed change module 4 and the main shaft assembly 3 is gear transmission. The output interface 47 of the speed change module 4 is connected to the speed signal interface 512 of the analysis module 5, which is used to transmit the relationship curve between the power unit speed and time. The output interface of the coordinate acquisition unit 7 is connected to the fixed cone dynamic cone coordinate model interface of the analysis module 5, which is used to transmit the fixed cone profile curve coordinates (X Mi , Y Mi ) and the coordinates of the moving cone profile (X Ci , Y Ci The output interface of the output correction module 6 is connected to the belt scale signal interface of the analysis module 5 for transmitting the relationship curve between the actual output and time.

[0063] Furthermore, the upper frame assembly is provided with a positionable moving cone liner, the main shaft assembly is provided with a positionable fixed cone liner, and the coordinate acquisition unit acquires position information of the moving cone liner and the fixed cone liner.

[0064] Furthermore, the speed change module includes the following modules in a serial structure:

[0065] Input interface;

[0066] D / A converter;

[0067] Frequency converter;

[0068] A power unit, used to control the rotation speed of the crusher;

[0069] A / D converter;

[0070] The output interface is electrically connected to the analysis module.

[0071] Furthermore, the analysis module includes the following modules composed of a serial structure:

[0072] An input module is used to input relevant parameters, including: the rotating speed range of the moving cone, the delay time of material falling, the gravity acceleration, the material solid density, the void ratio of the material after extrusion, the volume filling ratio of the blocked section, the closed edge opening, the bottom angle of the moving cone, the eccentricity, the distance between the center of the moving cone and the eccentric sleeve, the distance from the bottom edge of the fixed cone to the center of the rotating cone, the fixed cone contour coordinates and the moving cone contour coordinates;

[0073] The pre-processing module obtains the coordinate data of the fixed cone and the moving cone in the global coordinate system based on the input parameter information of the input module;

[0074] The numerical calculation module obtains the productivity, specifically: according to the minimum cross-sectional area criterion, the minimum blocking point position is estimated and the cross-sectional geometric information of the blocking point section is obtained; according to the productivity estimation formula, the basic parameters and the blocking point cross-sectional information are substituted into the formula and numerically integrated to obtain the productivity value;

[0075] Post-processing module: optimize the productivity obtained by the numerical calculation module to find the maximum productivity and its corresponding speed value;

[0076] An output module, wherein the output module comprises a rotation speed output module and the result display module.

[0077] Furthermore,

[0078] The yield correction module comprises:

[0079] Discharging angle belt machine;

[0080] Electronic belt scale;

[0081] A / D converter;

[0082] Output interface.

[0083] Furthermore, the coordinate acquisition unit includes:

[0084] Suspension point acquisition unit;

[0085] Moving cone collection unit;

[0086] Fixed cone collection unit;

[0087] A / D converter;

[0088] Output interface.

[0089] Furthermore, the pre-processing module includes a coordinate transformation submodule, a gear transformation eccentricity submodule, a speed input submodule and a volume filling rate calibration submodule; the coordinate transformation submodule includes a blocking layer position calculation submodule, a blocking layer area calculation submodule, an upper camber speed calculation submodule and a falling speed calculation submodule; the numerical calculation module includes a yield calculation submodule; the post-processing module includes a speed-yield relationship submodule and an optimal speed calculation submodule, and the output module includes a speed output module and a result display module.

[0090] Furthermore, in one example, the specific workflow of the analysis module is as follows:

[0091] The suspension point acquisition unit acquires the suspension point coordinates (X0, Y0), and the moving cone acquisition unit acquires the moving cone original coordinate group (X 0Mi , Y 0Mi ), the fixed cone acquisition unit acquires the fixed cone original coordinate group (X 0Ci , Y 0Ci ), the two are converted into digital signals through the A / D converter and then input into the fixed cone and dynamic cone coordinate signal interface, and then the coordinate transformation is performed through the coordinate transformation submodule.

[0092] Furthermore, in one example, the coordinate transformation method is: the suspension point is the origin O, the vertex coordinate O s =(X-X0, Y-Y0+h s ), where h s Indicates the distance between the suspension point and the fixed cone;

[0093] Thus, the coordinate group of the closed edge contour of the moving cone (X Mi , Y Mi )=(X 0Mi -C0,Y 0Mi -Y0+h s ) and the fixed cone profile coordinate group (X Ci , Y Ci )=(X 0Ci -X0,Y 0Ci -Y0+h s ).

[0094] The eccentricity gear input module outputs the eccentricity gear according to the keyway installation condition on the eccentric copper sleeve. Specifically, the eccentricity gear input module has a built-in model copper sleeve eccentricity correspondence table to obtain the eccentricity e and the center coordinates (X T , Y T ).

[0095] The precession angle γ is obtained from this = arctan(e / (-y Ci +Y Mi -Y T )).

[0096] The further coordinates of the opening edge of the moving cone after the deflection are: the coordinates of the closing edge of the moving cone after the deflection (X Mi , Y Mi ); the coordinates of the moving cone when not deflected are expressed as:

[0097] (X Mzi , Y Mzi )=((X Mi *cosγ+Y Mi *sinγ),(Y Mi *cosγ-X Mi *sinγ)).

[0098] Coordinates of the opening edge of the moving cone after deflection

[0099] (X MOi , Y MOi )

[0100] =((X MZi *cos(-γ)-Y MZi *sin(-γ)),(X MZi *sin(-γ)+Y MZi *sin(-γ)))

[0101] At this point, the coordinate transformation submodule is completed, and the moving cone coordinate group (X Mzi , Y Mzi ), the closed edge coordinates of the moving cone after deflection (X Mi , Y Mi ), coordinates of the opening edge of the moving cone after deflection (X MOi , Y MOi ), the fixed cone profile coordinate group (X MCi ,Y MCi ), the precession angle γ, is input into the blocking layer position calculation submodule.

[0102] The following describes the working principle of the blocking layer position calculation submodule: Get the outer radius of the Y-direction cross section of the fixed cone: R0 = X Ci ; The cross-sectional area of ​​the fixed cone in the Y direction is When the moving cone does not swing, the outer radius of the cross section in the Y direction is R = X Mzi .

[0103] Further calculation coefficients of the long and short sides of the ellipse

[0104] N=(cosγ 2 -(R 2 *sinγ 2 )) / (H0-h0) 2 ;

[0105] M=(H*sin2γ+2*R2*sinγ*H*cosγ-h0) / (H0-h0) 2 ;

[0106] S=(H 2 *sinγ 2 -R 2 *cosγ-h0) 2 / (H0-h0) 2 ;

[0107] Long axis of the ellipse in the Y-direction cross section after the moving cone swings

[0108] The minor axis of the ellipse in the Y-direction cross section after the moving cone swings

[0109] The elliptical trajectory coefficient of the Y-direction cross section after the moving cone swings is C=M / 2N;

[0110] The cross-sectional area S in the Y direction after the moving cone swings Mi =π*R 2 ;

[0111] Material passing area S i =S Ci -S Mi ;

[0112] Find S in the range of i=0 to i=n i The minimum value of S is when i = kmin. kmin , that is, to estimate the minimum blocking point position and obtain the cross-sectional geometric information of the blocking point section, then Y i Coordinate value is Y kmin .

[0113] The minimum blocking layer area Y axis coordinate Y kmin , S Ck , a, b, c, (X Mzk , Y Mzk ), the closed edge coordinates of the moving cone after deflection (X Mk , Y Mk ), coordinates of the opening edge of the moving cone after deflection (X Mok , Y Mok ), the fixed cone profile coordinate group (X Ck , Y Ck ), the precession angle γ is input into the blocking layer shape calculation submodule.

[0114] The workflow of the blocking layer shape calculation submodule is as follows:

[0115] The polar coordinate trajectory equation of the fixed cone section is R0(θ)=2X Ck cosθ;

[0116] Polar coordinate trajectory equation of moving cone section

[0117] Volume filling rate calibration submodule workflow:

[0118] Initial volume filling rate μ i0 =1, the corrected volume filling rate is μ ik =Q t / Q j , μ ik Enter the yield calculation submodule.

[0119] The workflow of the speed input submodule is as follows:

[0120] Current speed N n , adjustable speed group N j , N j Enter the 0531 production calculation submodule

[0121] The working process of the gear change eccentricity submodule is as follows:

[0122] After obtaining the gear information of the eccentric copper sleeve, slot A corresponds to e1, slot B corresponds to e2..., slot N corresponds to en, so that e=en, and e is input into the production calculation submodule;

[0123] The working principle of the output calculation submodule is as follows:

[0124] Calculate the polar coordinate trajectory of the material falling speed from

[0125] Get the polar coordinate trajectory v of the material's upward velocity up (θ);

[0126] Get the cone crusher blocking layer drop output:

[0127]

[0128] Get the cone crusher blocking layer arch output:

[0129]

[0130] Further N j Q at speed j =μ i (Q down -Q up );

[0131] The point group (N j , Q j ) inputting the optimal speed calculation module;

[0132] The workflow of the optimal speed calculation module is as follows:

[0133] Further in the point group (N j , Q j ) to find the maximum output Q max The corresponding N max , N max Passed to the speed output module; the speed output module is connected to the input interface, N max The digital signal is transmitted to the D / A converter through the input interface and converted into a digital quantity, and then transmitted to the frequency converter to act on the power unit to achieve the effect of variable speed and increased production.

[0134] Furthermore, the point group (N j , Q j ) is determined by obtaining the discharge speed of the discharging angle belt machine of the production correction module and the load-bearing result of the electronic belt scale.

[0135] The present invention is described in detail above in conjunction with the embodiments of the accompanying drawings. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, some details in the embodiments should not be construed as limiting the present invention, and the present invention shall be protected by the scope defined by the attached claims.

Claims

1. A variable speed and increased production control system for a cone crusher based on the layered crushing theory, the cone crusher comprising an upper frame assembly, a lower frame assembly and a main shaft assembly, characterized in that: The variable speed production increase control system comprises: Analysis module; A speed change module, which is in driving connection with the spindle assembly and is signal-connected with the analysis module, and is used to control the speed of the spindle; A coordinate acquisition unit, used for acquiring the position information of the upper frame assembly and the position information of the spindle assembly and connected with the analysis module signal; The output correction module is used to collect the output information of the cone crusher and is connected to the analysis module signal.

2. The cone crusher variable speed and increased production control system based on the layered crushing theory according to claim 1 is characterized in that: The upper frame assembly is provided with a positionable moving cone liner, the main shaft assembly is provided with a positionable fixed cone liner, and the coordinate acquisition unit acquires position information of the moving cone liner and the fixed cone liner.

3. The cone crusher variable speed and increased production control system based on the layered crushing theory as claimed in claim 1, characterized in that: The speed change module includes the following modules in a serial structure: Input interface; D / A converter; Frequency converter; A power unit, used to control the rotation speed of the crusher; A / D converter; The output interface is electrically connected to the analysis module.

4. The cone crusher variable speed and increased production control system based on the layered crushing theory as claimed in claim 3 is characterized in that: The analysis module includes the following modules composed of a serial structure: Input module, used to input relevant parameters; The pre-processing module obtains the coordinate data of the fixed cone and the moving cone in the global coordinate system based on the input parameter information of the input module; The numerical calculation module obtains the productivity, specifically: according to the minimum cross-sectional area criterion, the minimum blocking point position is estimated and the cross-sectional geometric information of the blocking point section is obtained; According to the productivity estimation formula, the basic parameters and the cross-section information of the blocking point are substituted into the formula and numerically integrated to obtain the productivity value; Post-processing module; Optimize the productivity obtained by the numerical calculation module to find the maximum productivity and its corresponding speed value; An output module, wherein the output module comprises a rotation speed output module and the result display module.

5. The cone crusher variable speed and increased production control system based on the layered crushing theory as claimed in claim 1, characterized in that: The yield correction module comprises: Discharging angle belt machine; Electronic belt scale; A / D converter; Output interface.

6. The cone crusher variable speed and increased production control system based on the layered crushing theory as claimed in claim 5, characterized in that: The coordinate acquisition unit comprises: Suspension point acquisition unit; Moving cone collection unit; Fixed cone collection unit; A / D converter; Output interface.

7. The cone crusher variable speed and increased production control system based on the layered crushing theory as claimed in claim 4, characterized in that: The pre-processing module includes a coordinate transformation submodule, a gear transformation eccentricity submodule, a speed input submodule and a volume filling rate calibration submodule; the coordinate transformation submodule includes a blocking layer position calculation submodule, a blocking layer area calculation submodule, an upper camber speed calculation submodule and a falling speed calculation submodule; the numerical calculation module includes a yield calculation submodule; the post-processing module includes a speed-yield relationship submodule and an optimal speed calculation submodule, and the output module includes a speed output module and a result display module.

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