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problems that cannot be ignored. Some leaders unwilling to do masses work, masses concept weak, on masses feelings not deep, pendulum not are with masses of relationship, think masses work is revolutionary war era of things, now obsolete has, buried business work, ignored masses work of situation compared General; some leaders not do masses work, old method regardless of with, new not with, not understand masses psychological, not understand masses wishes, not said masses language, work method simple stiff, caused masses of conflict and antipathy; some leaders can't do masses work, Faced with a lot of contradictions among the people worry about fear, panic set in encounter group events, and some are even mismanaged, inflame, so work has suffered heavy losses, and so on. These problems we are soberly aware, enhancing the party's ruling capability, the maintenance and development of the party's advanced nature and purity, and to enhance the ability of partcommittees and leading cadres are good people. Attach great importance to and is good at doing mass work, has become the new urgent situation strengthening the party's governing capacity-building tasks. Combined practice of maintaining flesh-and-blood ties with the masses, urged the broad masses of party members and cadres, especially all levels ... Processing to improve as a guide to the country. \d is summed up these new things, be promoted. \d manifestation of the Deng Xiaoping's mass. Deng also put people \happy\omise\point and destination of developing guidelines, policies, and as the only standard for measuring compliance with the wishes of the masses of the people. Under the guidance of Deng Xiaoping theory, Central Government adopted a series of important measures to strengthen links with the masses. In December 1989, the CPC Central Committemade on adhering to and perfecting the system of multi-party cooperation and political consultation under the leadership of the Chinese Communist Party, closely for CPC and the democratic parties and the relationship between the part of the masses that they contact, effectively carrying out the mass line, played a positive role. In March 1990, the 13 plenary session adopted the decision on strengthening contacts with the masses of the Party noted that \nd developed in the long struggle of the party's mass line, is to realize the party's ideological line, the fundamental political and organizational work route\can always maintain flesh-and-blood ties and development of the masses, is directly related to the rise and fall of the rise and fall of the party and State. In September 1994, 14 adopted by the plenary session of the Party on strengthening decision on several major issues of party building. The requirements of the decision of the party's leading bodies and leading cadres should develop a democratic style of work, come from the masses, to the masses, together, stick to the mass line. Party of 13 session four in the plenary yihou, to Jiang comrade for core of party粉体工程与设备测验2

一、名词解释（每个5分，计30分）

1. 平均粉碎比：若物料粉碎前的平均粒度为D，粉碎后的平均粒度为d，则D/d为平均粉

碎比P81

2. 闭路粉碎流程： 破碎 预及检查筛分

检查筛分

开路粉碎流程：不带检查筛分或选粉设备的粉碎（磨）流程；

闭路（或圈流）粉碎流程：凡带检查筛分或选粉设备的粉碎（磨）流程。P82

3. PEF 900*1200：复摆型鄂式破碎机，进料口宽度为900mm，长度为1200mm.P93 P--破碎机；E--颚式；F--复摆式；J--简摆式

4. 临界转速：是指磨内紧外层两个研磨体恰好开始贴随磨机筒体作周转状态时的磨机转速

P128

下该物料的单位电耗之比

E

当研磨体处于极限位置E点时（α=0），恰好贴随磨机筒体一起回转而部落下，即为临界条件。（α为脱离角） 5.相对易磨性系数：采用同一台粉碎机同一物料的标准物料的单位电耗与粉碎风干状态

6.钳角：鄂式破碎机动颚与定颚间的夹角αP96

二、问答题（每小题10分，计40分）

1. 简述磨机筒体内安装衬板和隔仓板的主要作用

衬板作用：保护筒体，使筒体免受粉磨介质和物料的直接冲击和摩擦；另外利用不同形式的衬板来调整各仓内粉磨体的运动状态。P116、P119

隔仓板作用：分隔研磨介质，阻止各仓间研磨介质的轴向移动；对物料有筛析作用，防止过大颗粒窜入下一仓；隔仓板菎板的孔大小及开孔率决定了磨内物料的流动速度，从而控制物料在磨内的粉磨时间

2. 反击式破碎机与锤式破碎机的比较，在结构和工作过程中各有差异，两者的主要区别有

哪些？

反击式破碎机是在锤式破碎机的基础上发展起来的，主要区别：1.电耗和金属消耗均比锤式破碎机少；（锤式破碎机的锤子是自由悬挂的，而反击式破碎机的锤子是固定在转子上的）反击式破碎机没有上下菎条筛，产品粒度一般均为5~10mm以上，而锤式破碎机大都有底部菎条，因而产品粒度小，较均匀 P103-104

3. 粉磨过程中球磨机筒体具有同一转速，而工艺要求各仓内研磨球要成不同运动状态，就

f third generation Central led collective, banner Deng Xiao-ping's theory great flag, insisted liberation thought, and facts, and times, in both at home and abroad political storm, and economic risk, severe test before, relies on party and people, defended China features Socialist, created socialist market new system, created full open new situation, advance party of construction new of great engineering, founded \e a representative\nt thought, Continue to steer the ship of reform and opening up forward on the right. Comrade Jiang Zemin said: \ngthening and improving the party's mass work in the new situation, it is of decisive significance to consolidating the ruling Foundation of the party. \ough our party and some of the world's major lessons learned from the success of the old party of the party, Comrade Jiang Zemin pointed out:\biggest political advantage of our party is in close contact with the masses, the most dangerous after the ruling party was divorced from the masses. \d:\construction, only the understanding, support and participation of the people, people's enthusiasm and creativity into full play in order to advance; the leadership of the party, only the tie and win the masses embraced, can be consolidated nd strengthened. \out that strengthening and improving the party's work style construction, maintaining the party's flesh-and-blood ties with the masses is the core problem, the key is to do solid work, implement, resolutely oppose and overcome formalism. Comrade Jiang Zemin stressed that all the work and policies of the party, are in compliance with the fundamental interests of the overwhelming majority of the people to the highest degree, to the majority of people are not satisfied with the fundamental guidelines, strive to make our workers, farmers, intellectuals and other people enjoy ... Single, everyone seemed to know. But well known does not mean perfect. Some party members and leadingcadres, consider contacting their small departments, within a small circle of people, or contact individual owners, the entrepreneur, is the masses, this idea is obviously not correct. The Communist Party of China, people should have three characteristics. First, the people should be the most social, is a Department within the scope of the majority. Specific to the party and Government departments, especially the cadres working in the Central and State organs, mass is the 1.3 billion Chinese people, work for the party members and cadres, masses are the land within the jurisdiction of the common people. The second characteristic of the masses, is that we have common interests. Masses are manifestations of each specific people, but the crowd is a comprehensive political concept, refers to people with common political and economic interests in the period of social transformation, social differentiation between the interests of the masses is large, if you do not find the interest in doing mass work, the party members and cadres, will be in a passive position. The third characteristic of the massesproblems that cannot be ignored. Some leaders unwilling to do masses work, masses concept weak, on masses feelings not deep, pendulum not are with masses of relationship, think masses work is revolutionary war era of things, now obsolete has, buried business work, ignored masses work of situation compared General; some leaders not do masses work, old method regardless of with, new not with, not understand masses psychological, not understand masses wishes, not said masses language, work method simple stiff, caused masses of conflict and antipathy; some leaders can't do masses work, Faced with a lot of contradictions among the people worry about fear, panic set in encounter group events, and some are even mismanaged, inflame, so work has suffered heavy losses, and so on. These problems we are soberly aware, enhancing the party's ruling capability, the maintenance and development of the party's advanced nature and purity, and to enhance the ability of partcommittees and leading cadres are good people. Attach great importance to and is good at doing mass work, has become the new urgent situation strengthening the party's governing capacity-building tasks. Combined practice of maintaining flesh-and-blood ties with the masses, urged the broad masses of party members and cadres, especially all levels ... Processing to improve as a guide to the country. \d is summed up these new things, be promoted. \d manifestation of the Deng Xiaoping's mass. Deng also put people \happy\omise\point and destination of developing guidelines, policies, and as the only standard for measuring compliance with the wishes of the masses of the people. Under the guidance of Deng Xiaoping theory, Central Government adopted a series of important measures to strngthen links with the masses. In December 1989, the CPC Central Committemade on adhering to and perfecting the system of multi-party cooperation and political consultation under the leadership of the Chinese Communist Party, closely for CPC and the democratic parties and the relationship between the part of the masses that they contact, effectively carrying out the mass line, played a positive role. In March 1990, the 13 plenary session adopted the decision on strengthening contacts with the masses of the Party noted that \nd developed in the long struggle of the party's mass line, is to realize the party's ideological line, the fundamental political and organizational work route\can always maintain flesh-and-blood ties and development of the masses, is directly related to the rise and fall of the rise and fall of the party and State. In September 1994, 14 adopted by the plenary session of the Party on strengthening decision on several major issues of party building. The requirements of the decision of the party's leading bodies and leading cadres should develop a democratic style of work, come from the masses, to the masses, together, stick to the mass line. Party of 13 session four in the plenary yihou, to Jiang comrade for core of party采用哪些措施来解决这对矛盾，保证磨机的最佳工作状态？

利用不同表面形状的衬板使之与研磨体之间产生不同的摩擦系数来改变研磨体的运动状态，以适应各仓内物料粉磨过程的要求，从而有效提高粉磨效率，增加产量，降低金属消耗。

（衬板部分）

4. 简述辊磨机的工作原理。

辊磨机是根据料床粉磨原理来粉磨物料的机械，磨内装有分级机构而构成闭路循环，其主要工作部件为磨盘及在其上做相对滚动的磨菎。磨菎依靠惯性离心力或机械压力的作用压在磨盘上，以挤压和磨剥方式将物料粉碎。P139 三、 说明与计算题

1、 请说明颚式、锤式和反击式破碎机的保险装置，并分析其保险原理。

鄂式破碎机：为保护活动颚板、机架、偏心轴免受损坏，一般将推力板分成2段，中间用螺栓连接，设计时适当地减弱螺栓的强度；也有在推力板上开孔或采用铸铁制造的。当破碎机负荷过大时，推力板或其螺栓断裂，动颚板停止摆动。液压鄂式破碎机连杆处的液压装置也具有保险作用。P95

锤式破碎机：当破碎机进入难碎物时，能沿销轴回转，起保护作用（锤子是自由悬挂的）；另外，在传动装置上还装有专门保险装置，利用主轴上的安全销过载时即被剪断，使电动机与破碎机转子脱开，起保护作用P100 反击式破碎机：当有大块或难碎物夹转子与反击板间隙时，反击板受到较大压力而向后移动，难碎物排出后在自重作用下恢复至原位，起到保险作用。（其间隙大小可以通过悬挂螺栓进行调整）P104

2、 为什么说复摆颚式破碎机比同规格的简摆颚式破碎机的生产能力大？ 复摆式：上大下小；简摆式：上小下大

复摆式的运动轨迹是一条复杂的曲线，其上部做圆周运动，下部做推力板弧线运动，中部做椭圆曲线运动；简摆式：动颚上各点均以悬挂轴为中心单纯做圆弧运动。复摆式：既有水平移动，又有垂直运动，结构简单合理；简摆式：水平行程上部小，下部大，不利于喂料的挟持和破碎。P93

复摆式颚式破碎机与简摆式相比较，其优点是：质量较轻，构件较少，结构更紧凑，破碎腔内充满程度较好，所装物料块受到均匀破碎，加以动颚下端强制性推出成品卸料，故生产率较高，比同规格的简摆颚式破碎机的生产率高出20-30%；物料块在动颚下部有较大的上下翻滚运动，容易呈立方体的形状卸出，减少了像简摆式产品中那样的片状成分，产品质量较好。具有结构简单合理、产量高、破碎比大、齿板寿命长、成品粒度均匀、动力消耗低、维修保养方便等

四、 填空题

1、提升式双层隔仓板具有（ 强制排料 ）作用。P120 2、大型球磨机的传动方式一般为（ 中心传动 ）P126

3、用几台破碎机串联破碎，这种破碎过程称为（多级破碎 ），其总粉碎比为（i0 =i1*i2…..*in ）P81

4、阶梯式衬板只适合磨机的（管磨机 ）仓，而小波纹被衬板只适合于磨机的（ 细磨 ）仓。P118

5、研磨体的运行方式包括（ 泻落式 ）、（ 抛落式 ）、（离心式 ）三种。P114

6、破碎机常用破碎比指标中有平均粉碎比和公称粉碎比，两者之间的关系 为（ 平均粉碎比=70%~90%公称粉碎比 ）。P81

f third generation Central led collective, banner Deng Xiao-ping's theory great flag, insisted liberation thought, and facts, and times, in both at home and abroad political storm, and economic risk, severe test before, relies on party and people, defended China features Socialist, created socialist market new system, created full open new situation, advance party of construction new of great engineering, founded \e a representative\nt thought, Continue to steer the ship of reform and opening up forward on the right. Comrade Jiang Zemin said: \ngthening and improving the party's mass work in the new situation, it is of decisive significance to consolidating the ruling Foundation of the party. \ough our party and some of the world's major lessons learned from the success of the old party of the party, Comrade Jiang Zemin pointed out:\biggest political advantage of our party is in close contact with the masses, the most dangerous after the ruling party was divorced from the masses. \d:\construction, only the understanding, support and participation of the people, people's enthusiasm and creativity into full play in order to advance; the leadership of the party, only the tie and win the masses embraced, can be consolidated and strengthened. \out that strengthening and improving the party's work style construction, maintaining the party's flesh-and-blood ties with the masses is the core problem, the key is to do solid work, implement, resolutely oppose and overcome formalism. Comrade Jiang Zemin stressed that all the work and policies of the party, are in compliance with the fundamental interests of the overwhelming majority of the people to the highest degree, to the majority of people are not satisfied with the fundamental guidelines, strive to make our workers, farmers, intellectuals and other people enjoy ... Single, everyone seemed to know. But well known does not mean perfect. Some party members and leadingcadres, consider contacting their small departments, within a small circle of people, or contact individual owners, the entrepreneur, is the masses, this idea is obviously not correct. The Communist Party of China, people should have three characteristics. First, the people should be the most social, is a Department within the scope of the majority. Specific to the party and Government departments, especially the cadres working in the Central and State organs, mass is the 1.3 billion Chinese people, work for the party members and cadres, masses are the land within the jurisdiction of the common people. The second characteristic of the masses, is that we have common interests. Masses are manifestations of each specific people, but the crowd is a comprehensive political concept, refers to people with common political and economic interests in the period of social transformation, social differentiation between the interests of the masses is large, if you do not find the interest in doing mass work, the party members and cadres, will be in a passive position. The third characteristic of the masses