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========================================喜歡這套資料就充值下載吧。。。資源目錄里展示的都可在線預(yù)覽哦。。。下載后都有，，請放心下載，，文件全都包含在內(nèi)，，【有疑問咨詢QQ:414951605 或 1304139763】
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鋼絲繩電動葫蘆作為一種輕小型起重設(shè)備，廣泛用于國民經(jīng)濟(jì)各個領(lǐng)域，而國內(nèi)鋼絲繩電動葫蘆近幾年的發(fā)展卻十分緩慢。上世紀(jì)60年代到70年代初，我國從前蘇聯(lián)引進(jìn)了Tv型鋼絲繩電動葫蘆，70年代初我國自行設(shè)計了CD1型鋼絲繩電動 葫蘆取代Tv型鋼絲繩電動葫蘆，至目前為止CD1型鋼絲繩電動葫蘆在國內(nèi)生產(chǎn)制造、使用已達(dá)30多年的歷史。其間，曾有一些廠家引進(jìn)國外先進(jìn)的生產(chǎn)制造技術(shù)，但均未獲得廣泛的推廣應(yīng)用。鋼絲繩電動葫蘆技術(shù)水平在國內(nèi)發(fā)展遲緩，其原因是多方面的，國內(nèi)鋼絲繩電動葫蘆企業(yè)生產(chǎn)、制造水平及配套的機(jī)械、電氣及標(biāo)準(zhǔn)件技術(shù)基礎(chǔ)較低，近20年來，國內(nèi)經(jīng)濟(jì)體制由計劃經(jīng)濟(jì)轉(zhuǎn)向市場經(jīng)濟(jì)，許多國營企業(yè)在轉(zhuǎn)制初期不可能將大量的資金投入到產(chǎn)品開發(fā)上， CD1型鋼絲繩電動葫蘆目前仍有一定的市場占有率。近年來，國外的鋼絲繩電動葫蘆技術(shù)水平發(fā)展很快。隨著我國加入WTO，外資企業(yè)紛紛打進(jìn)中國市場，國外鋼絲繩電動葫蘆對國內(nèi)產(chǎn)品的沖擊將越來越大。國內(nèi)低價、低檔次的產(chǎn)品，已不再有廣泛的市場，用戶對產(chǎn)品的性價比越來越重視。所以，國內(nèi)鋼絲繩電動葫蘆如不很快地適應(yīng)國內(nèi)、國際市場的要求進(jìn)行產(chǎn)品更新?lián)Q代，將很快被淘汰。
CD1型鋼絲繩電動葫蘆能在國內(nèi)市場使用近30多年，有其成功的方面，但是在其使用過程也暴露了一些亟待改進(jìn)的不足。
小車上機(jī)構(gòu)的布置及同一機(jī)構(gòu)中各零件間的配合要求適當(dāng)，起升機(jī)構(gòu)和小車運(yùn)行機(jī)構(gòu)二者之間的距離不應(yīng)太小，否則維修不便，或造成小車架難以設(shè)計；但也不應(yīng)太大，否則小車就不緊湊。 小車車輪的輪壓分布要求均勻。且要求獲得最小的車輪、軸及軸承箱的尺寸，并且使起重機(jī)橋架主梁上受到均勻的載荷。一般最大輪壓不應(yīng)超過平均輪壓的20%。小車架上的機(jī)構(gòu)與小車架配合要恰當(dāng)。在設(shè)計原則上，要以機(jī)構(gòu)為主，盡量用小車去配合機(jī)構(gòu)；同時機(jī)構(gòu)的布置也要盡量使鋼結(jié)構(gòu)的設(shè)計制造方便。因?yàn)樾≤嚰苁菫榱税仓门c支承起升機(jī)構(gòu)和小車運(yùn)行機(jī)構(gòu)的，所以小車架要按照起升和運(yùn)行機(jī)構(gòu)的要求設(shè)計，但在不影響機(jī)構(gòu)工作的前提下，機(jī)構(gòu)的布置也應(yīng)配合小車架的設(shè)計，使其構(gòu)造簡單、合理和便于制造。
電動葫蘆的工作原理是：先啟動起升電動機(jī)，把重物起升到適當(dāng)?shù)母叨?，再啟動運(yùn)行電動機(jī)把重物運(yùn)到指定的位置，運(yùn)行小車在單工字鋼梁的下緣行走。行走時采用一個電動機(jī)驅(qū)動運(yùn)行小車兩邊的車輪。由于行走速度比較小，因此運(yùn)行小車一般不設(shè)制動機(jī)構(gòu)。運(yùn)行小車在行走時，為防止重物下降，在起升機(jī)構(gòu)上設(shè)置了一個電磁制動器。制動是依靠彈簧的壓力把內(nèi)、外盤壓緊，原理與摩擦離合器相似，松開時利用電磁鐵通電以后吸住外盤而使內(nèi)、外盤松開。電磁制動器的電路與起升電機(jī)的電路并聯(lián)，因此只要起升電機(jī)一啟動，電磁制動器松開，使重物上、下升降自如；當(dāng)電動機(jī)關(guān)閉時，則電磁制動器也斷電，電磁吸引力消失，在彈簧的壓力作用下，內(nèi)外盤緊緊壓住，起到制動的作用。
電動葫蘆的跑車機(jī)構(gòu)也稱為運(yùn)行機(jī)構(gòu)，即行走小車的結(jié)構(gòu)設(shè)計。在設(shè)計行走小車結(jié)構(gòu)的同時我們應(yīng)當(dāng)考慮多個因素，必須力求滿足以下幾方面要求：
a 小車與工字鋼橫梁的配合要恰當(dāng)。小車與工字鋼橫梁的互相配合，主要在于：小車軌距（車輪中心平面間的水平距離）和工字鋼上的小車軌距應(yīng)相同；其次在于：小車上的緩沖器與橋架上的擋鐵位置要配合好，小車上的撞尺和工字鋼上的行程限位開關(guān)要配合恰當(dāng)。小車的平面布置應(yīng)緊湊，高度要小，相應(yīng)地可使起重機(jī)的高度減小，從而降低了廠房建筑物的高度。
b 小車上機(jī)構(gòu)的布置及同一機(jī)構(gòu)中各零件間的配合要求適當(dāng)。起升機(jī)構(gòu)和小車運(yùn)行機(jī)構(gòu)二者之間的距離不應(yīng)太小，否則維修不便，或造成小車架難以設(shè)計；但也不應(yīng)太大，否則小車就不緊湊。
c 小車車輪的輪壓分布要求均勻。且要求獲得最小的車輪、軸及軸承箱的尺寸，并且使起重機(jī)橋架主梁上受到均勻的載荷。一般最大輪壓不應(yīng)超過平均輪壓的20%。
d 小車架上的機(jī)構(gòu)與小車架配合要恰當(dāng),在設(shè)計原則上，要以機(jī)構(gòu)為主，盡量用小車去配合機(jī)構(gòu)；同時機(jī)構(gòu)的布置也要盡量使鋼結(jié)構(gòu)的設(shè)計制造方便。因?yàn)樾≤嚰苁菫榱税仓门c支承起升機(jī)構(gòu)和小車運(yùn)行機(jī)構(gòu)的，所以小車架要按照起升和的布置也應(yīng)配合小車架的設(shè)計，使其構(gòu)造簡單、合理和便于制造,盡量選用標(biāo)準(zhǔn)零部件，以提高設(shè)計與制造的工作效率，降低生產(chǎn)成本,小車各部分的設(shè)計應(yīng)考慮制造、安裝和維護(hù)檢修方便，盡可能保證各部件拆下修理時而不須移動相鄰的部件。
The present paper first introduced the YXA3132 gear-hobbing machine bed's electric control system's characteristic, then to the YXA3132 gear-hobbing machine bed's engine bed control work situation, the electrical system, electrical operation showing has carried on the concrete study including some protective system and the part active channel. Has conducted system's analytical study in the paper to the traditional relay - contact device electric control system, proposed the good transformation plan.Through applies the programmable controller the control system to complete the relay and so on control function, realizes the control simplicity,operation convenient. This improvement program elaborates from control system's hardware design and the software design two aspects. In the hardware design aspect, to the original relay's replace, the electrical choice and the electrical control system's wiring design has given the detailed explanation; In the software design aspect, according to programming's request from the YXA3132 gear-hobbing machine bed's work requirement, the sequence of operation, design proposal's contrast, the trapezoidal chart, the directive statement table and so on different aspect carries on the explanation. Finally has carried on the simple elaboration to the PLC control system design's disturbance question and the main antijamming question. Through to the entire YXA3132 gear-hobbing machine bed's electric control system's improvement, in the existing enterprise is the very realistic technological transformations plan, has invests few, the effective quick characteristic, achieves the enhancement working efficiency, to reduce the gear-hobbing machine bed to present the breakdown the possibility, achieves the efficiency, the reliable goal.
And ask for the smallest wheels, axle and bearing box size, and so the main beam bridge crane by uniform load. Generally the largest round of pressure should not exceed an average of 20% of round pressure. Car rack and small institutions in keeping with the proper frame. Principle in the design, mainly to institutions, as far as possible to meet with car bodies; At the same time, the arrangement of bodies and we should try to make to facilitate the design and manufacture of steel structures.
Electric hoist is a kind of lifting appliances, or electric hoist. Light is a small lifting equipment. Import electric hoist with a small size, light weight, simple operation, easy-to-use features such as for industrial and mining enterprises, storage terminals and other places. Electric hoist is a motor, drive mechanism and composition of drum or sprocket. Wire rope electric hoist electric hoist points CD1 type, BCD-type electric hoist, MD-type electric hoist, BMD-type electric hoist, mini electric hoist, etc.. 1. Enhance Height: electric hoist as a tool to upgrade will enhance the height of a strict requirement. Therefore choose, it should include a detailed parameters.
a. Enhance the speed: the speed of the decision to enhance your work efficiency, the more high-speed electric hoist, the more you can improve efficiency.
b. Electric power: the use of different electric hoist motor is different, the same 10T of the electric hoist motor is also possible that the 13KW or 7.5KW, according to their own customers can be required to choose a different
c. Voltage: electric hoist used in all walks of life because inside, so the use of electric hoist is not the same voltage, 380V industrial power consumption has also has 220V electricity. For example, commonly used on the building renovation of the outdoor lifting machines have two types of 220V and 380V models.
d. Hook spacing: electric hoist to buy should be noted that the spacing between the upper and lower hook, because in certain plants will be electric hoist hook has a specific spacing requirements, types of electric hoist wire rope electric hoist have generally, as well as chain electric hoist, hook their spacing will vary greatly.
John Banks，Reaching out or overreaching?Cargo Systems International，1993,20(7)：51，53