A tooth profile design method, system and storage medium for a dam-containing equidistant spur grinding disc

Abstract

The invention discloses a tooth type design method, system and storage medium for a dam-containing equidistant spur grinding disc. The method comprises: determining an optimal target net tangential force value f t net According to f t net Determine the target value L of the total length of the grinding tooth in the grinding area CT According to L CT L caused by gear grinding CTb Determine the L caused by tooth grinding Tb ; Determine the L caused by tooth grinding Ab ; Compare L Tb and L Ab , determine the tooth profile parameters based on the comparison results; determine the L caused by tooth grinding CAb According to L CT L caused by the dam CTd Determine the dam parameters and then determine the L caused by the dam CAd According to L CAb and L CAd Determine the actual value of the total length of the grinding tooth in the grinding area L CA ; Compare L CA and L CT The tooth profile parameters are adjusted according to the comparison results. The present invention aims to ensure the slurry quality and reduce the refining energy consumption. By combining experience with theory, the present invention can realize the parameterization and personalized design of the tooth profile parameters of the equidistant spur-tooth grinding disc with retaining dam, and improve the flexibility and convenience of the design of the equidistant spur-tooth grinding disc with retaining dam.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical design, and in particular to a tooth profile design method, system and storage medium for a grinding disc with equidistant straight teeth including a retaining dam. Background Art

[0002] The equidistant straight tooth grinding disc (or grinding disc) is the most typical, widely used and most flexible grinding disc in the pulping and papermaking process. The dam is a special structure arranged in the groove to adjust the pulp flow and the pressure in the grinding area. The equidistant straight tooth grinding disc with dam mainly includes straight-through teeth with dam and multi-level partition grinding disc, center configuration with dam and pseudo configuration grinding disc, etc. Its flexible and changeable tooth design can basically meet the pulping process of various pulps.

[0003] At present, there are few design methods for grinding discs with retaining dams. There is only the design method of equidistant spur-tooth grinding discs proposed in ZL201910989592.7, which is based on the sliding length of the moving disc grinding teeth. It does not consider the angular parameters and retaining dam parameters of the spur-tooth grinding disc, which limits its effective application and cannot meet the design requirements of grinding discs with retaining dams. Summary of the invention

[0004] The embodiment of the present invention provides a tooth profile design method, system and storage medium for a grinding disc with equidistant straight teeth including a retaining dam, so as to solve the problems in the prior art.

[0005] On the one hand, an embodiment of the present invention provides a method for designing a tooth profile of a spur-tooth grinding disc with equal spacing including a retaining dam, comprising:

[0006] Determine the optimal target net tangential force value f according to the pulp type, fiber characteristics and refining process t net ;

[0007] According to the optimal target net tangential force value f t net Determine the target value L of the total length of the grinding tooth in the grinding area CT ;

[0008] According to the grinding disc size and the target value L of the total grinding tooth length of the grinding area CT The target value L of the total length of the grinding area equivalent to the grinding caused by the grinding CTb Determine the target value L of the total length of a single set of grinding teeth caused by grinding Tb ;

[0009] Determine the actual value L of the total length of a single set of grinding teeth caused by grinding Ab ;

[0010] Compare the total length target value L of a single set of grinding teeth Tb And the actual value of the total length of a single set of grinding teeth L Ab , determine the tooth profile parameters according to the comparison results;

[0011] Determine the actual value L of the total length of the grinding area equivalent to the grinding caused by the grinding CAb ;

[0012] According to the target value L of the total length of the grinding gear in the grinding area CT The target value L of the total length of the grinding teeth in the grinding area caused by the retaining dam CTd Determine the dam parameters and the actual value of the total length of the grinding teeth in the grinding area caused by the dam. CAd ;

[0013] According to the actual value of the total length of the grinding area equivalent grinding teeth L CAb and L CAd Determine the actual value of the total length of the grinding tooth in the grinding area L CA ;

[0014] Compare the actual value of the total length of the equivalent grinding teeth in the grinding area L CA The target value of the total length of the grinding tooth in the grinding area is L CT , adjust the tooth profile parameters according to the comparison results to obtain the final tooth profile parameters and dam parameters.

[0015] On the other hand, an embodiment of the present invention further provides a tooth profile design system for a spur-tooth grinding disc with equal spacing including a retaining dam, comprising:

[0016] The net tangential force value determination module is used to determine the optimal target net tangential force value f according to the pulp type, fiber characteristics and pulping process. t net ;

[0017] The first target value determination module is used to determine the optimal target net tangential force value f t net Determine the target value L of the total length of the grinding tooth in the grinding area CT ;

[0018] The second target value determination module is used to determine the target value L of the total length of the grinding teeth equivalent to the grinding area according to the grinding disc size and the grinding area. CT The target value L of the total length of the grinding area equivalent to the grinding caused by the grinding CTb Determine the target value L of the total length of a single set of grinding teeth caused by grinding Tb ;

[0019] The first actual value determination module is used to determine the actual value L of the total length of a single group of grinding teeth caused by grinding. Ab ;

[0020] The first comparison module is used to compare the total length target value L of a single group of grinding teeth Tb And the actual value of the total length of a single set of grinding teeth L Ab , determine the tooth profile parameters according to the comparison results;

[0021] The second actual value determination module is used to determine the actual value L of the total length of the grinding area equivalent to the grinding caused by the grinding. CAb ;

[0022] The third actual value determination module is used to determine the total length target value L of the grinding area equivalent grinding teeth CT The target value L of the total length of the grinding teeth in the grinding area caused by the retaining dam CTd Determine the dam parameters and the actual value of the total length of the grinding teeth in the grinding area caused by the dam. CAd ;

[0023] The fourth actual value determination module is used to determine the actual value L of the total length of the grinding gear equivalent in the grinding area. CAb and L CAd Determine the actual value of the total length of the grinding tooth in the grinding area L CA ;

[0024] The second comparison module is used to compare the actual value L of the total length of the grinding gear in the grinding area CA The target value of the total length of the grinding tooth in the grinding area is L CT , adjust the tooth profile parameters according to the comparison results to obtain the final tooth profile parameters and dam parameters.

[0025] On the other hand, an embodiment of the present invention further provides a computer storage medium, in which a plurality of computer instructions are stored. The plurality of computer instructions are used to enable a computer to execute the above method.

[0026] The tooth profile design method, system and storage medium of a dam-containing equidistant spur grinding disc in the present invention have the following advantages:

[0027] Introduce f t net Theoretically, the refining power consumption is linked to all tooth profile parameters. The design method of the present invention is applicable to center-configuration, pseudo-configuration grinding discs, straight-through teeth and multi-stage partitioned grinding discs, meeting the design requirements of all equidistant straight-tooth grinding discs with dams, and is conducive to the parametric design of equidistant straight-tooth grinding discs with dams in the low-concentration refining process, promoting the diversified, personalized and convenient design of grinding disc products. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A flow chart of a method for designing a tooth profile of a grinding disc with equidistant spur teeth including a retaining dam provided in an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of the long teeth and short teeth areas of a straight-tooth grinding disc with equal spacing including a retaining dam provided in an embodiment of the present invention;

[0031] Figure 3 A schematic diagram of the design results of a grinding disc with equidistant straight-through teeth including a retaining dam provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Figure 1 A flow chart of a tooth profile design method for a spur-tooth grinding disc with equidistant dam provided in an embodiment of the present invention. A tooth profile design method for a spur-tooth grinding disc with equidistant dam provided in an embodiment of the present invention comprises:

[0034] S100, determine the optimal target net tangential force value f according to pulp type, fiber characteristics and refining process t net .

[0035] For example, the net tangential force value f of the staggered area of ​​the optimal target single grinding teeth can be selected manually or automatically by a computer according to input conditions according to the determined pulp type, fiber characteristics and refining process. tT net , the net tangential force value f in the staggered area of ​​multiple grinding teeth tT net The optimal target net tangential force value f t net .

[0036] S110, according to the optimal target net tangential force value f t net Determine the target value L of the total length of the grinding tooth in the grinding area CT .

[0037] For example, before S110, it also includes: determining the grinding gear inclination angle α, the single group grinding gear center angle β and the average grinding gear stagger angle γ. Therefore, S110 specifically includes: according to the optimal target net tangential force value f t net , grinding gear inclination angle α, single group grinding gear center angle β and average grinding gear staggered angle γ determine the target value L of the total length of equivalent grinding gear in the grinding area CT .

[0038] During the low-concentration refining process, the average grinding tooth stagger angle γ must be less than 90°, and is generally selected within the range of 30 to 60°. The grinding tooth inclination angle α includes the moving plate grinding tooth inclination angle α R and the fixed plate grinding gear inclination angle α S The average grinding tooth stagger angle γ of the equidistant spur grinding disc is the grinding tooth inclination angle α of the moving disc. R 、Grinding gear inclination angle α S The sum of the central angle β of a single set of grinding teeth. R 、Grinding gear inclination angle α S The design of the sum of the grinding teeth center angle β and the effective average grinding teeth staggered angle γ must ensure the grinding quality and efficiency. Usually, the grinding teeth inclination angle α is 5-20°, and the single group grinding teeth center angle β is 15-30°. The target value L of the equivalent grinding teeth total length of the grinding area of ​​the equidistant spur grinding disc is CT It can be calculated according to the following formula:

[0039]

[0040] Among them, P net is the net power of refining, N is the speed, P net Both N and N can be determined based on the grinding gear inclination angle α and the single group grinding gear center angle β.

[0041] S120, according to the grinding disc size and the target value L of the total grinding tooth length of the grinding area CT The target value L of the total length of the grinding area equivalent to the grinding caused by the grinding CTb Determine the target value L of the total length of a single set of grinding teeth caused by grinding Tb .

[0042] Exemplarily, the grinding disc size includes the grinding disc outer diameter and the grinding disc inner diameter, and the method for determining the grinding disc size includes: obtaining the grinding disc outer diameter; and determining the grinding disc inner diameter according to the grinding disc outer diameter.

[0043] When the outer diameter of the grinding disc is r e After confirmation, the inner diameter r of the grinding disc can be determined according to the set ratio value i The recommended value of the ratio of the inner and outer diameters of the grinding disc is 0.51 to 0.6.

[0044] S120 specifically includes: according to the grinding tooth length ratio k allocated to the retaining dam and the target value L of the total grinding tooth length of the grinding area CT Determine the target value L of the total length of the grinding area equivalent to the grinding caused by the grinding CTb ; According to the grinding disc size and the target value L of the total grinding tooth length of the grinding area CTb Determine the target value L of the total length of a single set of grinding teeth caused by grinding Tb .

[0045] Assuming that the proportion of the grinding tooth length allocated to the retaining dam is k, the target value of the total grinding tooth length of the grinding area including the retaining dam caused by the grinding tooth is L CTb = (1-k)L CT , and the target value of the total length of the grinding teeth in the grinding area caused by the dam is L CTd kL CT .

[0046] In determining the grinding disc size and the target value L of the total length of the grinding teeth in the grinding area CTb After that, the target value L of the total length of a single set of grinding teeth caused by grinding Tb It can be determined by the following formula:

[0047]

[0048] S130, determining the actual value L of the total length of a single group of teeth caused by teeth grinding Ab .

[0049] For example, for an equidistant straight-through tooth grinding disc, a single set of grinding teeth can be divided into a long tooth area l, short tooth areas s1 and s2, such as Figure 2 As shown, the average grinding length l in the long tooth area can be calculated l 、Number n l , average length of grinding teeth in short tooth area l s1 , l s2 and quantity n s1 、n s2 , the actual value of the total length of a single set of grinding teeth L can be obtained A for:

[0050] L A = l l ·n l +l s1 ·n s1 +l s2 ·n s2

[0051] For an equidistant multi-stage partitioned equidistant spur grinding disc, if the grinding disc is divided into j zones, the actual value of the total length of a single group of grinding teeth L can be obtained. A for:

[0052]

[0053] Therefore, the actual total length of a single set of grinding teeth of the equidistant spur grinding disc is L A It can be uniformly expressed as:

[0054] L A =K(a+b)

[0055] Among them, a is the grinding width, b is the slot width, and K is the coefficient. The actual value of the total length of a single set of grinding teeth caused by grinding is L AbIt can be expressed as (1-k)L A .

[0056] S140, compare the total length target value L of a single group of grinding teeth Tb And the actual value of the total length of a single set of grinding teeth L Ab , determine the tooth profile parameters based on the comparison results.

[0057] Exemplarily, the tooth profile parameters include the grinding tooth width a and the groove width b, so S140 specifically includes: comparing the total length target value L of the single group of grinding teeth Tb And the actual value of the total length of a single set of grinding teeth L Ab , determine the sum of the grinding tooth width a and the groove width b based on the comparison results; determine the grinding tooth width a and the groove width b based on the type of slurry.

[0058] By comparing the total length target value L of a single set of grinding teeth Tb With the actual value L Ab , the sum of the grinding tooth width a and the groove width b can be obtained. When grinding different pulps, the recommended value of the grinding tooth height is 4-8mm, while the recommended values ​​of other tooth parameters of the equidistant straight tooth grinding disc are different. For coniferous wood pulp, the recommended tooth width is 3.5-6.5mm, and the groove width is 2.9-5.9mm; for hardwood pulp, the recommended tooth width is 2.0-3.5mm, and the groove width is 2.2-4mm; for coniferous and hardwood mixed pulp, the recommended tooth width is 2.8-4.4mm, and the groove width is 3.1-4.4mm. Determine the corresponding parameter range according to the actual pulp to be processed, and then select the parameters that meet the requirements of the sum of the grinding tooth width a and the groove width b from the parameter range.

[0059] S150, determining the actual value L of the total length of the grinding area equivalent to the grinding caused by the grinding CAb .

[0060] For example, after the tooth profile parameters are determined, the number of grinding teeth n of the moving disk in each annular area can be determined accordingly. Rk , average grinding gear inclination angle α ARk and radial increment of grinding area △r Rk , and the number of fixed plate grinding teeth n Sk , average grinding gear inclination angle α ASk and radial increment of grinding area △r Sk , then the actual value of the total length of the grinding area equivalent to the grinding teeth caused by the grinding teeth of the equidistant spur tooth grinding disc with retaining dam is L CAb It can be calculated as follows:

[0061]

[0062] S160, according to the target value L of the total length of the grinding area equivalent grinding teeth CT The target value L of the total length of the grinding teeth in the grinding area caused by the retaining dam CTdDetermine the dam parameters and the actual value of the total length of the grinding teeth in the grinding area caused by the dam. CAd .

[0063] Exemplarily, S160 specifically includes: according to the grinding tooth length ratio k allocated to the retaining dam and the target value L of the total grinding tooth length equivalent to the grinding area CT Determine the target value L of the total length of the grinding teeth in the grinding area caused by the retaining dam CTd ; According to the target value L of the total length of the grinding tooth equivalent in the grinding area CTd Determine the calculated value n of the number of retaining dams contained in a single set of grinding teeth dsec ; Calculate the value n according to the quantity dsec Determine the corresponding quantity design value n d ; Design value n according to quantity d Determine the dam parameters and the actual value of the total length of the grinding teeth in the grinding area caused by the dam. CAd .

[0064] If the retaining dam is a rectangular parallelepiped structure, the average grinding tooth inclination angle in the grinding area is α A , b d and c d are the width of the dam along the groove and the width along the edge of the grinding tooth, respectively, and h d is the height of the dam, and the number of dams contained in a single set of grinding teeth can be calculated as n dsec for:

[0065]

[0066] Determine the quantity calculation value n dsec After that, we can round it to get the quantity design value n d .

[0067] The total equivalent length L of the grinding teeth in the grinding area with dam caused by the dam CdA , can be calculated by the following formula

[0068]

[0069] Among them, n dS and n dR Respectively represent the design values ​​of the number of retaining dams for the fixed grinding plate and the movable grinding plate, a S and a R Respectively represent the tooth width of the fixed plate and the moving plate, b S and b R Respectively represent the slot width of the fixed plate and the moving plate, b dS and b dR represents the width of the groove along the dam of the fixed grinding disc and the movable grinding disc, c dS and c dR Respectively represent the width of the dam of the fixed grinding disc and the movable grinding disc along the edge of the grinding teeth.

[0070] S170, according to the actual value of the total length of the grinding area equivalent grinding teeth L CAb and L CAd Determine the actual value of the total length of the grinding tooth in the grinding area L CA .

[0071] For example, the actual value L of the total length of the equivalent grinding teeth of the grinding area of ​​the equidistant spur grinding disc including the retaining dam is CA The actual value of the total length of the grinding area equivalent to the grinding caused by the grinding is L CAb and the actual value L of the total length of the equivalent grinding teeth in the grinding area caused by the retaining dam CAd The sum can be calculated by the following formula:

[0072] L CA =L CAb +L CAd

[0073] S180, compare the actual value L of the total length of the grinding area equivalent grinding teeth CA The target value of the total length of the grinding tooth in the grinding area is L CT , adjust the tooth profile parameters according to the comparison results to obtain the final tooth profile parameters and dam parameters.

[0074] For example, S180 specifically includes: comparing the actual value L of the total length of the grinding tooth equivalent in the grinding area CA The target value of the total length of the grinding tooth in the grinding area is L CT ; If the actual value of the total length of the grinding area equivalent grinding teeth L CA The target value of the total length of the grinding tooth in the grinding area is L CT If the difference between them exceeds the set threshold, the tooth profile parameters are adjusted; the actual value L of the total length of the corresponding grinding area equivalent grinding teeth is determined according to the adjusted tooth profile parameters CA ; Compare the actual value L of the total length of the grinding area equivalent grinding teeth after adjustment CA The target value of the total length of the grinding tooth in the grinding area is L CT ; If the actual value of the total length of the grinding area equivalent grinding teeth after adjustment is L CA The target value of the total length of the grinding tooth in the grinding area is L CT When the difference between the two exceeds the threshold, the tooth profile parameters are adjusted again until the actual value of the total length of the grinding tooth equivalent in the grinding area L CA The target value of the total length of the grinding tooth in the grinding area is L CT The difference between them is less than the threshold.

[0075] The above threshold can be set to 10%. If the actual value of the total length of the grinding area equivalent grinding teeth L CA The target value of the total length of the grinding tooth in the grinding area is L CT The difference between them exceeds the actual value of the equivalent grinding gear total length L CA Or the target value of the total length of the grinding teeth in the grinding area L CTIf the tooth profile is less than 10%, the tooth profile parameters need to be adjusted.

[0076] Experimental Description

[0077] Assume that the net power of MD3000 single disc refiner is 1±0.05kW, the disc speed is 1460r / min, and the disc outer diameter is r e The inner diameter of the grinding disc is 101.5 mm. i The average fiber length of the hardwood pulp is about 0.95 mm, and the pulping concentration is set at 2.5% to produce offset book paper.

[0078] The design of the tooth type of the grinding disc with dam is roughly based on Figure 1 conduct.

[0079] (1) Select the optimal target f for the refining process t net value.

[0080] The light industry standard QB T 1211-2010 stipulates that for first-class offset book paper, its tear length should be greater than or equal to 3.2km, and the paper weight should be 60g / m 2 When the tensile index is 31.36Nm / g or more, the tensile index should be greater than or equal to 31.36Nm / g; and for the superior offset printing paper, the tensile index should be greater than or equal to 34.3Nm / g. In addition, the requirement for the tightness of offset printing paper is less than or equal to 0.85g / m 3 , that is, the paper thickness is greater than or equal to 1.18m 3 / g. Based on experimental research experience, the appropriate net tangential force f is obtained. t net It should be controlled between 0.086 and 0.107N. In order to ensure the adaptability of the designed grinding gear, the middle value is selected as the optimal target net tangential force in the staggered area of ​​a single grinding gear, which is about 0.097N.

[0081] In order to ensure the grinding efficiency and take into account the noise of the grinding process, the present invention designs the average grinding tooth stagger angle to be 40°, the grinding disc design type is a center-equidistant straight-through tooth grinding disc, and the groove depth is 6mm; for the single-group grinding tooth center angle, the more common 22.5° is initially adopted. Therefore, according to the set average grinding tooth stagger angle, the grinding disc grinding tooth inclination angle can be preliminarily determined to be 8.75°. After calculation, the target value L of the total length of the grinding teeth in the grinding area can be obtained: CT is 658.9m. If the total equivalent length of the target grinding gear in the grinding area is L CT One tenth of the gear length L caused by the dam is allocated to the grinding gear equivalent length L CTd , the rest is the equivalent grinding length L caused by grinding CTb, the values ​​of which are 10m and 650m respectively. According to the equivalent grinding length L caused by grinding CTb , it can be calculated that the total target length of a single set of grinding teeth is 0.391m.

[0082] like Figure 2 As shown in Table 1, if the equidistant spur tooth grinding disc designed in the present invention contains left and right short tooth areas, the number of grinding teeth in different areas and the average grinding tooth length in different areas can be calculated, as shown in Table 1.

[0083] Table 1 Number of grinding teeth and average grinding tooth length in different areas

[0084]

[0085] By summing the grinding tooth lengths in different areas, the actual value of the total length of a single group of grinding teeth is 1.656 / (a+b)m, while the target value of the total length of a single group of grinding teeth obtained above is 0.391m. Therefore, it can be calculated that the sum of the grinding tooth width a and the groove width b is 4.3mm.

[0086] In the pulping process, a mixed pulp of hardwood and coniferous wood is used, and the grinding tooth width a is preliminarily determined to be 2 mm and the groove width b is 2.3 mm. The tooth structure of the equidistant straight tooth grinding disc optimized according to the above data is as follows: Figure 3 As shown in the figure, the dam parameters are as follows: the dam height is 6 mm, the width along the grinding direction is 2 mm, and the width along the groove direction is 2.3 mm. According to the formula, the number of dams in a single group of grinding teeth is 23.

[0087] The actual measurement shows that the equivalent total grinding tooth length is 625.55m, with a deviation of 5.1% from the theoretical value, which can basically meet the use requirements.

[0088] The embodiment of the present invention further provides a tooth profile design system for a spur-tooth grinding disc with equal spacing including a retaining dam, comprising:

[0089] The net tangential force value determination module is used to determine the optimal target net tangential force value f according to the pulp type, fiber characteristics and pulping process. t net ;

[0090] The first target value determination module is used to determine the optimal target net tangential force value f t net Determine the target value L of the total length of the grinding tooth in the grinding area CT ;

[0091] The second target value determination module is used to determine the target value L of the total length of the grinding teeth equivalent to the grinding area according to the grinding disc size and the grinding area. CT The target value L of the total length of the grinding area equivalent to the grinding caused by the grinding CTb Determine the target value L of the total length of a single set of grinding teeth caused by grinding Tb ;

[0092] The first actual value determination module is used to determine the actual value L of the total length of a single group of grinding teeth caused by grinding. Ab ;

[0093] The first comparison module is used to compare the total length target value L of a single group of grinding teeth Tb And the actual value of the total length of a single set of grinding teeth L Ab , determine the tooth profile parameters according to the comparison results;

[0094] The second actual value determination module is used to determine the actual value L of the total length of the grinding area equivalent to the grinding caused by the grinding. CAb ;

[0095] The third actual value determination module is used to determine the total length target value L of the grinding area equivalent grinding teeth CT The target value L of the total length of the grinding teeth in the grinding area caused by the retaining dam CTd Determine the dam parameters and the actual value of the total length of the grinding teeth in the grinding area caused by the dam. CAd ;

[0096] The fourth actual value determination module is used to determine the actual value L of the total length of the grinding gear equivalent in the grinding area. CAb and L CAd Determine the actual value of the total length of the grinding tooth in the grinding area L CA ;

[0097] The second comparison module is used to compare the actual value L of the total length of the grinding gear in the grinding area CA The target value of the total length of the grinding tooth in the grinding area is L CT , adjust the tooth profile parameters according to the comparison results to obtain the final tooth profile parameters and dam parameters.

[0098] An embodiment of the present invention further provides a computer storage medium, in which a plurality of computer instructions are stored. The plurality of computer instructions are used to enable a computer to execute the above method.

[0099] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0100] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A tooth design method for a spur-tooth grinding disc with equal spacing including a retaining dam, characterized in that: include: Determine the optimal target net tangential force value f according to the pulp type, fiber characteristics and refining process t net ; According to the optimal target net tangential force value f t net Determine the target value L of the total length of the grinding tooth in the grinding area CT ; According to the grinding disc size and the target value L of the total length of the grinding teeth in the grinding area CT The target value L of the total length of the grinding area equivalent to the grinding caused by the grinding CTb Determine the target value L of the total length of a single set of grinding teeth caused by grinding Tb ; Determine the actual value L of the total length of a single set of grinding teeth caused by grinding Ab ; Compare the total length target value L of the single set of grinding teeth Tb And the actual value of the total length of a single set of grinding teeth L Ab , determine the tooth profile parameters according to the comparison results; Determine the actual value L of the total length of the grinding area equivalent to the grinding caused by the grinding CAb ; According to the target value L of the total length of the grinding gear equivalent in the grinding zone CT The target value L of the total length of the grinding teeth in the grinding area caused by the retaining dam CTd Determine the dam parameters and the actual value of the total length of the grinding teeth in the grinding area caused by the dam. CAd ; According to the actual value L of the total length of the grinding area equivalent grinding teeth CAb and L CAd Determine the actual value of the total length of the grinding tooth in the grinding area L CA ; Compare the actual value L of the total length of the grinding area equivalent grinding teeth CA The target value of the total length of the grinding tooth in the grinding area is L CT , adjusting the tooth profile parameters according to the comparison results to obtain final tooth profile parameters and dam parameters; The target value L of the total length of the grinding teeth equivalent to the grinding area is CT The target value L of the total length of the grinding area equivalent to the grinding caused by the grinding CTb Determine the target value L of the total length of a single set of grinding teeth caused by grinding Tb ,include: According to the proportion k of the grinding tooth length allocated to the dam and the target value L of the total grinding tooth length of the grinding area CT Determine the target value L of the total length of the grinding area equivalent to the grinding caused by the grinding CTb ; According to the grinding disc size and the target value L of the total grinding tooth length of the grinding area CTb Determine the target value L of the total length of a single set of grinding teeth caused by grinding Tb ; The target value L of the total grinding length of the grinding zone equivalent gear CT The target value L of the total length of the grinding teeth in the grinding area caused by the retaining dam CTd Determine the dam parameters and the actual value of the total length of the grinding teeth in the grinding area caused by the dam. CAd ,include: According to the proportion k of the grinding tooth length allocated to the dam and the target value L of the total grinding tooth length of the grinding area CT Determine the target value L of the total length of the grinding teeth in the grinding area caused by the retaining dam CTd ; According to the target value L of the total length of the grinding gear equivalent in the grinding zone CTd Determine the calculated value n of the number of retaining dams contained in a single set of grinding teeth dsec ; Calculate the value n based on the said quantity dsec Determine the corresponding quantity design value n d ; Design value n according to the number d Determine the dam parameters and the actual value of the total length of the grinding teeth in the grinding area caused by the dam. CAd ; The actual value L of the total length of the grinding teeth equivalent to the grinding zone is compared CA The target value of the total length of the grinding tooth in the grinding area is L CT , adjusting the tooth profile parameters according to the comparison results to obtain the final tooth profile parameters and dam parameters, including: Compare the actual value L of the total length of the grinding area equivalent grinding teeth CA The target value of the total length of the grinding tooth in the grinding area is L CT ; If the actual value of the total length of the grinding area equivalent grinding teeth L CA The target value of the total length of the grinding tooth in the grinding area is L CT When the difference between the values ​​exceeds a set threshold, the tooth profile parameters are adjusted; Determine the actual value L of the total length of the corresponding grinding area equivalent grinding teeth according to the adjusted tooth profile parameters CA ; Compare the actual value L of the total length of the grinding area equivalent to the adjusted grinding gear again CA and the target value L of the total length of the grinding area equivalent grinding teeth CT ; If the actual value of the total length of the grinding area equivalent to the grinding teeth after adjustment is L CA and the target value L of the total length of the grinding area equivalent grinding teeth CT If the difference between the actual value L and the actual value L of the total length of the grinding tooth equivalent in the grinding zone exceeds the threshold, the tooth profile parameters are adjusted again until the actual value L of the total length of the grinding tooth equivalent in the grinding zone reaches CA and the target value L of the total length of the grinding area equivalent grinding teeth CT The difference between is less than the threshold.

2. The tooth profile design method of a spur-tooth grinding disc with equidistant teeth including a retaining dam according to claim 1 is characterized in that: The grinding disc size includes the grinding disc outer diameter and the grinding disc inner diameter. The method for determining the grinding disc size includes: Get the outer diameter of the grinding disc; The inner diameter of the grinding disc is determined according to the outer diameter of the grinding disc.

3. The tooth profile design method of a spur-tooth grinding disc with equidistant teeth including a retaining dam according to claim 1 is characterized in that: According to the optimal target net tangential force value f t net Determine the target value L of the total length of the grinding tooth in the grinding area CT Previously, it also included: Determine the grinding gear inclination angle α, the single group grinding gear center angle β and the average grinding gear stagger angle γ; The optimal target net tangential force value f t net Determine the target value L of the total length of the grinding tooth in the grinding area CT ,include: According to the optimal target net tangential force value f t net , grinding gear inclination angle α, single group grinding gear center angle β and average grinding gear staggered angle γ determine the target value L of the total length of equivalent grinding gear in the grinding area CT .

4. The tooth profile design method of a spur-tooth grinding disc with equidistant teeth including a retaining dam according to claim 1 is characterized in that: The tooth profile parameters include grinding tooth width a and groove width b, and the comparison of the single group grinding tooth total length target value L Tb And the actual value of the total length of a single set of grinding teeth L Ab , determine the tooth profile parameters based on the comparison results, including: Compare the total length target value L of the single set of grinding teeth Tb And the actual value of the total length of a single set of grinding teeth L Ab , determine the sum of the grinding width a and the groove width b according to the comparison result; The grinding tooth width a and the groove width b are determined according to the type of slurry.

5. A system using the tooth profile design method of a spur-tooth grinding disc with equidistant teeth including a retaining dam as described in any one of claims 1 to 4, characterized in that: include: The net tangential force value determination module is used to determine the optimal target net tangential force value f according to the pulp type, fiber characteristics and pulping process. t net ; The first target value determination module is used to determine the optimal target net tangential force value f t net Determine the target value L of the total length of the grinding tooth in the grinding area CT ; The second target value determination module is used to determine the target value L of the total length of the grinding teeth equivalent to the grinding area according to the grinding disc size and the grinding area. CT The target value L of the total length of the grinding area equivalent to the grinding caused by the grinding CTb Determine the target value L of the total length of a single set of grinding teeth caused by grinding Tb ; The first actual value determination module is used to determine the actual value L of the total length of a single group of grinding teeth caused by grinding. Ab ; The first comparison module is used to compare the total length target value L of the single group of grinding teeth Tb And the actual value of the total length of a single set of grinding teeth L Ab , determine the tooth profile parameters according to the comparison results; The second actual value determination module is used to determine the actual value L of the total length of the grinding area equivalent to the grinding caused by the grinding. CAb ; The third actual value determination module is used to determine the total length target value L of the grinding area equivalent grinding teeth CT The target value L of the total length of the grinding teeth in the grinding area caused by the retaining dam CTd Determine the dam parameters and the actual value of the total length of the grinding teeth in the grinding area caused by the dam. CAd ; The fourth actual value determination module is used to determine the actual value L of the total length of the grinding tooth equivalent in the grinding area according to the actual value L CAb and L CAd Determine the actual value of the total length of the grinding tooth in the grinding area L CA ; The second comparison module is used to compare the actual value L of the total length of the grinding area equivalent grinding teeth CA The target value of the total length of the grinding tooth in the grinding area is L CT , the tooth profile parameters are adjusted according to the comparison results to obtain the final tooth profile parameters and dam parameters.

6. A computer storage medium, characterized in that: The computer storage medium stores a plurality of computer instructions, and the plurality of computer instructions are used to enable a computer to execute the method according to any one of claims 1 to 4.

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