限位开关就是用以限定机械设备的运动****限位置的电气开关。限位开关有接触式的和非接触式的。接触式的比较直观，机械设备的运动部件上，安装上行程开关，与其相对运动的固*上安装****限位置的挡块，或者是相反安装位置。当行程开关的机械触头碰上挡块时，切断了（或改变了）控制电路，机械就停止运行或改变运行。由于机械的惯性运动，这种行程开关有一定的“超行程”以保护开关不受损坏。非接触式的形式很多，常见的有干簧管、光电式、感应式等，这几种形式在电梯中都能够见到。当然还有更多的****形式。限位开关是一种常用的小电流主令电器。利用生产机械运动部件的碰撞使其触头动作来实现接通或分断控制电路，达到一定的控制目的。通常，这类开关被用来限制机械运动的位置或行程，使运动机械按一*置或行程自动停止、反向运动、变速运动或自动往返运动等。在电气控制系统中，限位开关的作用是实现顺序控制、*控制和位置状态的检测。用于控制机械设备的行程及限位保护。构造：由操作头、触点系统和外壳组成。

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v  陕西欣鸿然自动化设备有限公司

v  联系人:宁超         热  线：029-83338136

v  手 机：15339052544  *1293858601       

v  邮箱:1293858601@** 传真:029-83561013 

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Limit switch working limit switch and limit switch, limit switch is used to give the work mechani* of action in place signal. Limit switch is to prevent the agency beyond the scope of design and accident. Work limit switches are installed in the *ition of the mechani* to change the conditi*witch, signal is given, for other related acti*. Limit switch installed in the mos*stal moveme*f mechani*, to protect the mechani* of action is too large there is damaged.

The main part of the switch is com*ed of the following materials

Mark of part*aterials

Contact Au corrosion resistance is superior, for *all load. Because of its soft texture (Vivtorinox hardness HV25 ~ 65), it is easy to adhesion (contact adhesive), and in the contact force under the condition of large contact easy to sag.

Alloy of gold, silver, 10% silver gold alloy AuAg 90% corrosion resistance is very good, hardness is HV30 ~ 90, higher than the gold, so it is widely used in *all load switch.

Platinum, gold, silver, 69% gold, 25% silver alloy PGS, 6% platinum alloy, corrosion resistance is very good, hardness is also the same with gold and silver alloy, widely used in *all load switch. Known as the "No. 1 alloy".

Silver palladium alloy AgPd, good corrosion resistance, but it is easy to adsorb organic gas generation polymer. 50% silver, 50% case of palladium, hardness is HV100 ~ 200.

Silver Ag electrical conductivity, thermal conductivity is one of the largest in the metal. Although the exhibit lower contact resistance, but the drawback*easy to generate sulfide film in sulfide gases in the environment, in the *all load area is easy to produce bad. Hardness is HV25 ~ 45. For more general load switch.

Silver, nickel alloy AgNi 90% silver, 10% silver, nickel and silver nickel alloy electric conductivity in close, arc resistance, excelle*esistance to melting. Hardness is HV65 ~ 115.

Silver, indium, tin alloy AgInSn hardness, high melting point, excellent arc resistance, not easy to melt or transfer.

The movable spring, the movable plate spring with phosphor bronze C5210 rolling resistance, fatigue resistance and corrosion resistance. H*e carried out annealing treatment. If the spring critical value (Kb0.075) of C5210-H i*ore than 40kgf/mm2, C5210-EH i*ore than 47kgf/mm2, the lower, are widely used in the *all micro switch.

VXF31.25  VXF31.39  VXF31.40  VXF31.50  VXF31.65  VXF31.80  VXF31.90 VXF31.91 

VXF31.92  VXF40.100-124  VXF40.125-200  VXF40.150-300  VXF40.15-1.9  VXF40.15-3 

VXF40.25-5  VXF40.25-7.5  VXF40.40-12  VXF40.40-19  VXF40.50-31  VXF40.65-49 

VXF40.80-78  VXF41.25  VXF41.25(4)  VXF41.40  VXF41.40(4)  VXF41.49  VXF41.49(4) 

VXF41.50  VXF41.50(4)  VXF41.65  VXF41.65(4)  VXF41.80  VXF41.80(4) 

VXF41.90  VXF41.90(4)  VXF41.91  VXF41.91(4)  VXF41.92  VXF41.92(4)   

NHR-M41-27/X-0/X-A    NHR-M41-27/X-0/X-D

      NHR-M41-28/X-0/X-A    NHR-M41-28/X-0/X-D

      NHR-M41-29/X-0/X-A    NHR-M41-29/X-0/X-D

      NHR-M41-30/X-0/X-A    NHR-M41-30/X-0/X-D

      NHR-M41-31/X-0/X-A    NHR-M41-31/X-0/X-D

      NHR-M41-32/X-0/X-A    NHR-M41-32/X-0/X-D

      NHR-M41-33/X-0/X-A    NHR-M41-33/X-0/X-D

      NHR-M41-34/X-0/X-A    NHR-M41-34/X-0/X-D

      NHR-M41-35/X-0/X-A    NHR-M41-35/X-0/X-D

      NHR-M41-25/X-0/0-A    NHR-M41-25/X-0/0-D

      NHR-M41-26/X-0/0-A    NHR-M41-26/X-0/0-D

      NHR-M41-27/X-0/0-A    NHR-M41-27/X-0/0-D

      NHR-M41-28/X-0/0-A    NHR-M41-28/X-0/0-D

      NHR-M41-29/X-0/0-A    NHR-M41-29/X-0/0-D

      NHR-M41-30/X-0/0-A    NHR-M41-30/X-0/0-D

      NHR-M41-31/X-0/0-A    NHR-M41-31/X-0/0-D

      NHR-M41-32/X-0/0-A    NHR-M41-32/X-0/0-D

      NHR-M41-33/X-0/0-A    NHR-M41-33/X-0/0-D

      NHR-M41-34/X-0/0-A    NHR-M41-34/X-0/0-D

      NHR-M41-35/X-0/0-A    NHR-M41-35/X-0/0-D

      NHR-M41-25/X-0/1-A    NHR-M41-25/X-0/1-D

凡兼人者有三术：有以德兼人者，有以力兼人者，有以富兼人者。彼贵我名声， 美我德行，欲为我民，故辟门除涂，以迎吾入。因其民，袭其处，而百姓皆安。立 法施令，莫不顺比。是故得地而权弥重，兼人而兵俞强：是以德兼人者也。非贵我 名声也，非美我德行也，彼畏我威，劫我埶，故民虽有离心，不敢有畔虑，若是则 戎甲俞众，奉养必费。是故得地而权弥轻，兼人而兵俞弱：是以力兼人者也。非贵 我名声也，非美我德行也，用贫求富，用饥求饱，虚腹张口，来归我食。若是，则 必发夫掌窌之粟以食之，委之财货以富之，立良有司以接之，已期三年，然后民可 信也。是故得地而权弥轻，兼人而国俞贫：是以富兼人者也。故曰：以德兼人者王， 以力兼人者弱，以富兼人者贫，古今一也。

兼幷易能也，唯坚凝之难焉。齐能幷宋，而不能凝也，故魏夺之。燕能幷齐， 而不能凝也，故田单夺之。韩之上地，方数百里，完全富足而趋赵，赵不能凝也， 故秦夺之。故能幷之，而不能凝，则必夺；不能幷之，又不能凝其有，则必亡。能 凝之，则必能幷之矣。得之则凝，兼幷无强。古者汤以薄，武王以滈，皆百里之地 也，天下为一，诸侯为臣，无他故焉，能凝之也。故凝士以礼，凝民以政；礼修而 士服，政平而民安；士服民安，夫是之谓大凝。以守则固，以征则强，令行禁止， ****之事毕矣。