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非接觸逆止器畢業(yè)設(shè)計(參考版)

2025-06-08 22:47本頁面
  

【正文】 fluid systems are restricted to shorter distances than are electrical systems. Hydraulic power transmission system ale concerned with the generation, modulation, and control of pressure and flow and ,and in general such systems include: 1. Pumps which convert available power from the prime mover to hydraulic power at the actuator. 2. Valves which control the direction of pumpflow, the level of power produced, and the amount of fluid 一一 flow to the actuators. The power level is determined by controlling both the flow and pressure level. 3. Actuators which convert hydraulic power to usable mechanical power Output at the point required. 4. The medium, which is a liquid, provides rigid transmission and control as well as 1ubrication of ponent s, sealing in valves. and cooling of the system. 5. Connectors which link the various system ponents, provide power conductors for the fluid under pressure , and fluid flow return to tank。 directional control valve includes a oneway valve , oneway fluid control valve, shuttle valve, valve and so on. Under the control of different ways, can be divided into the hydraulic valve control switch valve, control valve and set the value of the ratio control valve. Auxiliary ponents, including fuel tanks, oil filters, tubing and pipe joints, seals, pressure gauge, oil level, such as oil dollars. Hydraulic oil in the hydraulic system is the work of the energy transfer medium, there are a variety of mineral 中國礦業(yè)大學(xué) 2021 屆本科生畢業(yè)設(shè)計 44 oil, emulsion oil hydraulic molding Hop categories. There are only three basic methods of transmitting power: Electrical,mechanical. and fluid power. Most applications actually use a bination of the three methods to obtain the most efficient overall system. To properly determine which principle method to use。 the backstop requires strict reliability, its design standards related to the final product quality. A plete hydraulic system consists of five parts, namely, power ponents, the implementation of ponents, control ponents, no parts and hydraulic oil. The role of dynamic ponents of the original motive fluid into mechanical energy to the pressure that the hydraulic system of pumps, it is to power the entire hydraulic system. The structure of the form of hydraulic pump gears are generally pump, vane pump and piston pump. Implementation of ponents (such as hydraulic cylinders and hydraulic motors) which is the pressure of the liquid can be converted to mechanical energy to drive the load for a straight line reciprocating movement or rotational movement. Control ponents (that is, the various hydraulic valves) in the hydraulic system to control and regulate the pressure of liquid, flow rate and direction. According to the different control functions, hydraulic valves can be divided into the village of force control valve, flow control valves and directional control valve. Pressure control valves are divided into benefits flow valve (safety valve), pressure relief valve, sequence valve, pressure relays, etc.。 聯(lián)軸器的選擇計算 聯(lián)軸器的計算轉(zhuǎn)矩為: 9550 we w z t w z t nPT TK K K K K K K K Tn? ? ? 式中, T —— 理論轉(zhuǎn)矩, Nm? ; wP —— 驅(qū)動功率, KW ; n—— 工作轉(zhuǎn)速, /minr ; wK —— 動力機(jī)系數(shù):一般取值,電動機(jī)、透平機(jī), ? ;四缸及四缸以上內(nèi)燃機(jī), ? ;二缸內(nèi)燃機(jī), ? ;單缸內(nèi)燃機(jī), ? ; K —— 工況系數(shù); zK —— 啟動系數(shù): zK 值與 頻率 f 有關(guān): 120 /fh? 次 時, = ;=120 ~ 240 /fh次 時, = ; 240 /fh? 次 時, zK 的值 由制造廠確定; tK —— 溫度系數(shù); nT —— 公稱轉(zhuǎn)矩, ?Nm。 = 軸凸緣直徑為: 內(nèi)鏈板高度 2 mm? 中國礦業(yè)大學(xué) 2021 屆本科生畢業(yè)設(shè)計 41 2180d c o t 1 .0 4 0 .7 6zg ph? ? ?。 齒頂圓直徑為: m ax d p d? ? ? 中國礦業(yè)大學(xué) 2021 屆本科生畢業(yè)設(shè)計 40 1 3 9 .9 1 .2 5 1 9 .5 1 1 .9 11 5 2 .4 mm? ? ? ?? m in 11 .6(1 )d d p dz? ? ? ? .9 (1 ) 123 mm? ? ? ? ?? 齒根圓直徑為: 1fd d d?? 13 11 .91 12 8 mm? ? ? 節(jié)距多邊形以上的齒高為: m a x 10 .8( 0 .6 2 5 ) 0 .5ah p dz? ? ? ( 25 ) 19. 05 11. 9123 mm? ? ? ? ?? m in ( )ah p d?? 0 .5 (1 9 .0 5 1 1 .9 1 )3 .5 7mm? ? ?? 最大齒根距離為: 奇數(shù)齒 190cos zxL d d??。 確定中心距 實際中心距為: 221 2 1 2 2 184 2 2 2PPz z z z z zpa L L ???? ? ?? ? ? ? ? ???? ? ? ? ?? ? ? ? ? ?? ? ? ? ? ??? ( 47) ? ? ( 102 23 ) 102 23 04753 mm??? ? ? ? ???? 驗算速度 1160 1000zn pv? ? ( 48) 中國礦業(yè)大學(xué) 2021 屆本科生畢業(yè)設(shè)計 39 則 2 3 1 5 0 0 1 9 . 0 5 1 0 . 9 5 /6 0 1 0 0 0v m s????? 符合估計 滾子鏈鏈輪的計算 滾子鏈鏈輪的基本參數(shù)和主要尺寸如圖 所示: 圖 12A 雙排鏈基本參數(shù)如表 所示: 表 雙排鏈基本參數(shù) 名稱 鏈輪齒數(shù) 節(jié)距 滾子外徑 排距 銷軸全寬 符號 z p 1d 1p 5b 尺寸 23 鏈輪的分度圓直徑為: 180sinzpd ?。修正公式為: ( 44) 中國礦業(yè)大學(xué) 2021 屆本科生畢業(yè)設(shè)計 37 0Az L mKP PK K K ? ( 46) 式中, P —— 名義傳遞功率, KW ; 0P —— 試驗條件下的額定功率, KW ; AK —— 載荷系數(shù),見表 ; zK —— 小鏈輪齒數(shù)系數(shù); mK —— 多排鏈系數(shù) ,見表 ; LK —— 鏈長系數(shù)。因此取 102PL ? 。 最大中心距 max 80ap? 。 取 2123zz?? 確定鏈條長度 一般情況下,初定中心距 0 (30 ~ 50)ap? 。鏈傳動的傳動比一般 8i? ,推薦 2~? ,當(dāng) 3/v m s?且載荷平穩(wěn)時允許到 10。最后,根據(jù)鏈輪軸和逆止器軸來選定所需的聯(lián)軸器以及軸承的計算以及型號的確定。此試驗臺是通過一個變頻調(diào)速電動機(jī) 1來帶動大鏈輪 2旋轉(zhuǎn),然后大鏈輪 2帶動小鏈輪 3旋轉(zhuǎn),小鏈輪帶動通過聯(lián)軸器 4所連接的安裝在逆止器上的軸旋轉(zhuǎn),從而實現(xiàn)逆止器 5的運轉(zhuǎn)。 中國礦業(yè)大學(xué) 2021 屆本科生畢業(yè)設(shè)計 33 圖 1— 接頭體 2— 螺母 3— 管套 4— 油管 4 動態(tài)試驗臺設(shè)計 動態(tài)性能試驗臺的結(jié)構(gòu)運動簡圖如圖 所示: 圖 1— 電動機(jī) 2— 大鏈輪 3— 小鏈輪 4— 聯(lián)軸器 5— 逆止器 動態(tài)性能試驗臺應(yīng)該能夠滿足自由運轉(zhuǎn)的測驗、阻力距的測驗、最小非接觸轉(zhuǎn)速的測驗這些項目的試驗功能。將已沖成喇叭口的管子置于接頭體的外錐面和管套 (或 B型螺母 )的內(nèi)錐孔之間,旋 緊螺母使管子的喇叭口受壓,擠貼于接頭體外錐面和管套 (或 B型的螺母 )內(nèi)錐孔所產(chǎn)生的間隙中,從而起到密封作用。外錐的接頭體 l和帶有 90176。外錐面的管接頭體 起壓緊作用的螺母 2和帶有 60176。 圖 1— 油管 2— 卡套 3— 螺母 4— 接頭體 5— 組合墊圈 圖 。錐孔,并隨之變形,使卡套與接頭體內(nèi) 錐面形成球面接觸密封;同時,卡套的內(nèi)刃口嵌入油管 l的外壁,在外壁上壓出一個環(huán)形凹槽,從而起到可靠的密封作用。錐形孔的接頭體 4,帶有尖銳內(nèi)刃的卡套 2,起壓緊作用的壓緊螺母 3三個元件。 圖 。接管與管路系統(tǒng)中的鋼管用焊接連接。 圖 1— 接頭 2— 螺母 3— O形密封圈 4— 接頭體 5— 組合墊圈 圖 ,主要由接頭體 螺母 2和接管 l組成,在接頭體和接管之間用 O形密封圈 3密封。當(dāng)被連接件之間存在擺動或轉(zhuǎn)動時,應(yīng)該選用鉸接式管接頭或中心回轉(zhuǎn)接頭。 管接頭 管接頭用于管道與管道或管道與元件之間的連接,
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