CN108160474A - A kind of compound curved surface type sorting screen - Google Patents
A kind of compound curved surface type sorting screen Download PDFInfo
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- CN108160474A CN108160474A CN201810235945.XA CN201810235945A CN108160474A CN 108160474 A CN108160474 A CN 108160474A CN 201810235945 A CN201810235945 A CN 201810235945A CN 108160474 A CN108160474 A CN 108160474A
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- curved surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
- B07B1/4618—Manufacturing of screening surfaces
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- Manufacturing & Machinery (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
一种复合曲面型清选筛属于农业机械；所述复合曲面型清选筛的纵向长度L1为1000—1800mm，横向长度L2为600—1500mm，构成所述复合曲面型清选筛的纵向曲线RP和横向曲线PN分别由下列曲线方程制得：式中：自变量xRP的取值范围为0至L1。式中：自变量xPN的取值范围为本筛有效提升了筛分作业性能，减少了籽粒损失，实现和达到了精细筛分的效果，结构新颖、简单、合理。
A compound curved surface type cleaning sieve belongs to agricultural machinery; the longitudinal length L of the composite curved surface type cleaning sieve is 1000-1800mm, and the transverse length L2 is 600-1500mm, forming the longitudinal length of the composite curved surface type cleaning sieve. The curve RP and the transverse curve PN are respectively obtained by the following curve equations: In the formula: the value range of the independent variable x RP is 0 to L 1 . In the formula: the value range of the independent variable x PN is This sieve effectively improves the performance of sieving operation, reduces the loss of grains, realizes and achieves the effect of fine sieving, and has a novel, simple and reasonable structure.
Description
技术领域technical field
本发明属于农业机械，具体涉及一种谷物清选使用的复合曲面型清选筛。The invention belongs to agricultural machinery, in particular to a compound curved surface type cleaning sieve used for grain cleaning.
背景技术Background technique
由于结构设计方面的不足和缺陷，现用的谷物清选机构所采用的清选筛大多为平面式，且筛面的横、纵方向上外形单一。在进行谷物清除杂余的作业使用时，由于物料在筛面上横、纵方向不同位置的分布及运动特性不同，导致筛面对物料的适应性较差，横向两侧易造成籽粒堆积，致使谷物与杂余分离效果不理想，作业效率低，清杂效果和质量有待提高。Due to deficiencies and defects in structural design, most of the cleaning sieves used by existing grain cleaning mechanisms are planar, and the horizontal and vertical shapes of the sieve surface are single. When carrying out grain removal operations, due to the different distribution and movement characteristics of materials at different positions in the horizontal and vertical directions on the sieve surface, the adaptability of the sieve to the materials is poor, and grains are easy to accumulate on both sides of the horizontal direction, resulting in The separation effect of grain and debris is not ideal, the operation efficiency is low, and the cleaning effect and quality need to be improved.
发明内容Contents of the invention
本发明的目的就是针对上述现有技术存在的问题，通过仿真分析和数值计算分析方法，设计一种复合曲面型清选筛，以达到解决筛分作业过程中筛面对物料的适应性较差、提高清杂效果和作业质量的目的。The purpose of the present invention is to solve the problems existing in the above-mentioned prior art, through simulation analysis and numerical calculation and analysis methods, to design a composite curved surface type cleaning screen, so as to solve the poor adaptability of the screen to materials in the screening operation process , Improving the cleaning effect and the purpose of operation quality.
本发明的目的通过如下方案来实现:一种复合曲面型清选筛，所述复合曲面型清选筛的纵向长度L1为1000—1800mm，横向长度L2为600—1500mm；构成所述复合曲面型清选筛的纵向曲线RP和横向曲线PN分别由下列两段曲线方程制得：The object of the present invention is achieved by the following scheme: a composite curved surface type cleaning screen, the longitudinal length L of the composite curved surface type cleaning screen is 1000-1800mm, and the transverse length L2 is 600-1500mm; The longitudinal curve RP and the transverse curve PN of the surface type cleaning screen are respectively obtained by the following two curve equations:
式中：自变量xRP的取值范围为0至L1。 In the formula: the value range of the independent variable x RP is 0 to L 1 .
式中：自变量xPN的取值范围为至 In the formula: the value range of the independent variable x PN is to
纵向曲线RP主要作用是针对物料在筛面纵向方向上不同位置的分布及运动特性不同的问题，提高筛面对物料的适应性，实现筛面前端物料在筛面上充分分摊，筛面中部利于籽粒透筛，筛面后端利于杂余抛掷出清选室的目的，达到精细筛分的作业效果；横向曲线PN的主要作用是防止籽粒在筛面横向两侧堆积，减少籽粒损失，提高筛分性能。The main function of the longitudinal curve RP is to improve the adaptability of the screen surface to the material in order to solve the problem of different distribution and movement characteristics of the material at different positions in the longitudinal direction of the screen surface, so as to realize the full distribution of the front-end material on the screen surface and the middle part of the screen surface. The grain is sieved through, and the back end of the screen surface is good for the purpose of throwing the residue out of the cleaning room, so as to achieve the operation effect of fine screening; the main function of the horizontal curve PN is to prevent the accumulation of grains on the lateral sides of the screen surface, reduce the loss of grains, and improve the screening efficiency. sub-performance.
本发明的有益效果是：有效提升了清选筛筛分作业性能，实现和达到了精细筛分的效果。The beneficial effects of the invention are: effectively improving the performance of the cleaning sieve screening operation, realizing and achieving the effect of fine screening.
附图说明Description of drawings
图1是一种复合曲面型清选筛总体结构三维示意图。Fig. 1 is a three-dimensional schematic diagram of the overall structure of a composite surface type cleaning screen.
具体实施方式Detailed ways
下面结合附图对本发明实施方案进行详细描述。一种复合曲面型清选筛，所述复合曲面型清选筛的纵向长度L1为1000—1800mm，横向长度L2为600—1500mm；构成所述复合曲面清选筛的纵向曲线RP和横向曲线PN分别由下列两段曲线方程制得：Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. A compound curved surface type cleaning sieve, the longitudinal length L1 of the composite curved surface type cleaning sieve is 1000-1800mm, and the transverse length L2 is 600-1500mm; The curve PN is obtained by the following two curve equations respectively:
式中：自变量xRP的取值范围为0至L1。 In the formula: the value range of the independent variable x RP is 0 to L 1 .
式中：自变量xPN的取值范围为至 In the formula: the value range of the independent variable x PN is to
所述复合曲面型清选筛为编织筛。The compound curved surface type cleaning screen is a woven screen.
本发明通过对筛分原理的研究，以及传统清选筛面的应用，对筛分过程中物料在筛面横向方向上不同位置的分布及运动特性不同和籽粒在筛面两侧堆积等问题的总结，采用数值计算方法获得曲面筛两条复合曲线的控制方程，利用气固耦合手段(CFD—DEM)模拟清选装置中谷物的筛分作业过程，确定筛面控制方程的参数，使用试验设计软件(Design-Expert)进行参数优化，分别获得其两条复合曲线RP、PN。大量仿真对比试验和台架对比试验表明，复合曲面型清选筛实现了筛面前端物料在筛面上充分分摊、筛面中部利于籽粒透筛、筛面后端利于杂余抛掷出清选室的目的，达到精细筛分的作业效果，并有效降低了筛分装置的籽粒损失率，提高了籽粒清洁率，满足清选装置的相关作业性能要求。Through the study of the screening principle and the application of the traditional cleaning screen surface, the present invention solves the problems of different distribution and movement characteristics of materials in different positions in the horizontal direction of the screen surface and the accumulation of grains on both sides of the screen surface during the screening process. To sum up, the control equations of the two composite curves of the surface sieve were obtained by numerical calculation method, and the gas-solid coupling method (CFD-DEM) was used to simulate the sieving process of the grain in the cleaning device, and the parameters of the control equation of the sieve surface were determined. The software (Design-Expert) optimizes the parameters and obtains its two compound curves RP and PN respectively. A large number of simulation comparison tests and bench comparison tests show that the compound curved surface cleaning screen realizes the full distribution of materials at the front end of the screen surface on the screen surface, the middle part of the screen surface is conducive to the penetration of grains, and the rear end of the screen surface is conducive to the throwing of debris out of the cleaning chamber The purpose is to achieve the operation effect of fine screening, and effectively reduce the grain loss rate of the screening device, improve the grain cleaning rate, and meet the relevant operating performance requirements of the cleaning device.
通过气固耦合仿真对比试验表明，复合曲面型清选筛有效降低了清选装置的籽粒损失率，并提高了籽粒的清洁率，比传统平面编织筛的籽粒损失率减少了0.47％,籽粒清洁度增加了18.3％；比传统平面贝壳筛的籽粒损失率减少了3.3％，籽粒清洁率增加了7.22％。随后的清选台架试验结果与仿真试验结果基本吻合，因此仿真试验和台架试验验证了复合曲面型清选筛的籽粒损失率较小，籽粒清洁率较高，满足清选装置的筛分作业要求。The comparison test of gas-solid coupling simulation shows that the compound curved surface cleaning screen effectively reduces the grain loss rate of the cleaning device and improves the grain cleaning rate, which is 0.47% less than the grain loss rate of the traditional flat woven screen, and the grain is clean The speed increased by 18.3%; compared with the traditional flat shell sieve, the grain loss rate was reduced by 3.3%, and the grain cleaning rate increased by 7.22%. The results of the subsequent cleaning bench test are basically consistent with the results of the simulation test. Therefore, the simulation test and the bench test have verified that the grain loss rate of the composite surface type cleaning sieve is small, and the grain cleaning rate is high, which meets the screening requirements of the cleaning device. Work requirements.
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| CN201810235945.XA CN108160474A (en) | 2018-03-21 | 2018-03-21 | A kind of compound curved surface type sorting screen |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111282822A (en) * | 2020-02-17 | 2020-06-16 | 中国农业大学 | A reciprocating arc combined corn cleaning device |
| CN112588582A (en) * | 2020-11-03 | 2021-04-02 | 东北农业大学 | Composite wave sieve imitating earthworm body surface structure and motion |
| CN117225702A (en) * | 2023-09-11 | 2023-12-15 | 红塔烟草(集团)有限责任公司 | A vibrating screen plate and pressing mold based on sinusoidal basis function |
| CN118060172A (en) * | 2024-02-02 | 2024-05-24 | 山东钢铁集团永锋临港有限公司 | A refined screening process for raw materials and fuels used in blast furnaces |
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| SU867434A1 (en) * | 1979-09-12 | 1981-09-30 | Институт Геотехнической Механики Ан Усср | Riddle for screen |
| CN2368873Y (en) * | 1998-08-24 | 2000-03-15 | 华南理工大学 | Vibration pulp purifying and concentrating screen |
| DE102006008444B4 (en) * | 2005-04-22 | 2010-08-05 | Andreas Klotz | Perforated plate for components and systems for processing pourable parts |
| CN202021151U (en) * | 2011-01-19 | 2011-11-02 | 伊建昌 | Concave-convex screen mesh |
| CN104174586A (en) * | 2014-08-01 | 2014-12-03 | 崔晓峰 | Wave type screening plate |
-
2018
- 2018-03-21 CN CN201810235945.XA patent/CN108160474A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| SU867434A1 (en) * | 1979-09-12 | 1981-09-30 | Институт Геотехнической Механики Ан Усср | Riddle for screen |
| CN2368873Y (en) * | 1998-08-24 | 2000-03-15 | 华南理工大学 | Vibration pulp purifying and concentrating screen |
| DE102006008444B4 (en) * | 2005-04-22 | 2010-08-05 | Andreas Klotz | Perforated plate for components and systems for processing pourable parts |
| CN202021151U (en) * | 2011-01-19 | 2011-11-02 | 伊建昌 | Concave-convex screen mesh |
| CN104174586A (en) * | 2014-08-01 | 2014-12-03 | 崔晓峰 | Wave type screening plate |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111282822A (en) * | 2020-02-17 | 2020-06-16 | 中国农业大学 | A reciprocating arc combined corn cleaning device |
| CN111282822B (en) * | 2020-02-17 | 2021-05-07 | 中国农业大学 | A reciprocating arc combined corn cleaning device |
| CN112588582A (en) * | 2020-11-03 | 2021-04-02 | 东北农业大学 | Composite wave sieve imitating earthworm body surface structure and motion |
| CN117225702A (en) * | 2023-09-11 | 2023-12-15 | 红塔烟草(集团)有限责任公司 | A vibrating screen plate and pressing mold based on sinusoidal basis function |
| CN118060172A (en) * | 2024-02-02 | 2024-05-24 | 山东钢铁集团永锋临港有限公司 | A refined screening process for raw materials and fuels used in blast furnaces |
| CN118060172B (en) * | 2024-02-02 | 2025-12-02 | 山东钢铁集团永锋临港有限公司 | A fine screening process for raw materials and fuels for blast furnaces |
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Application publication date: 20180615 |