液壓挖掘機(jī)泵源設(shè)計(jì)【含CAD圖紙和說(shuō)明書(shū)】
液壓挖掘機(jī)泵源設(shè)計(jì)【含CAD圖紙和說(shuō)明書(shū)】,含CAD圖紙和說(shuō)明書(shū),液壓,挖掘機(jī),設(shè)計(jì),cad,圖紙,以及,說(shuō)明書(shū),仿單
寧XX大學(xué)
畢業(yè)設(shè)計(jì)(論文)
挖掘機(jī)泵源設(shè)計(jì)
所在學(xué)院
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指導(dǎo)老師
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摘 要
本文主要完成挖掘機(jī)泵源系統(tǒng)設(shè)計(jì)，驅(qū)動(dòng)的液壓系統(tǒng)，它由油箱、濾油器、液壓泵、溢流閥、開(kāi)停閥、節(jié)流閥、換向閥、液壓缸以及連接這些元件的油管組成。它的工作原理：液壓泵由電動(dòng)機(jī)帶動(dòng)旋轉(zhuǎn)后，從油箱中吸油。油液經(jīng)濾油器進(jìn)入液壓泵，當(dāng)它從泵中輸出進(jìn)入壓力管后，將換向閥手柄、開(kāi)停手柄方向往內(nèi)的狀態(tài)下，通過(guò)開(kāi)停閥、節(jié)流閥、換向閥進(jìn)入液壓缸左腔，推動(dòng)活塞和工作臺(tái)向右移動(dòng)。這時(shí)，液壓缸右腔的油經(jīng)換向閥和回油管排回油箱。為了克服移動(dòng)工作臺(tái)時(shí)所受到的各種阻力，液壓缸必須產(chǎn)生一個(gè)足夠大的推力，這個(gè)推力是由液壓缸中的油液壓力產(chǎn)生的。要克服的阻力越大，缸中的油液壓力越高；反之壓力就越低。輸入液壓缸的油液是通過(guò)節(jié)流閥調(diào)節(jié)的，液壓泵輸出的多余的油液須經(jīng)溢流閥和回油管排回油箱，這只有在壓力支管中的油液壓力對(duì)溢流閥鋼球的作用力等于或略大于溢流閥中彈簧的預(yù)緊力時(shí)，油液才能頂開(kāi)溢流閥中的鋼球流回油箱。所以，在系統(tǒng)中液壓泵出口處的油液壓力是由溢流閥決定的，它和缸中的油液壓力不一樣大。
關(guān)鍵詞：挖掘機(jī), 液壓挖掘機(jī)，泵源，液壓站
V
Abstract
This paper mainly completes the design of excavator hydraulic pump system, the hydraulic drive system, it consists of a tank, oil filter, hydraulic pump, relief valve, stop valve, throttle valve, reversing valve, hydraulic cylinder and connection of these components tubing composition. Its working principle: the hydraulic pump driven by the motor after the rotation, from the oil tank. Oil by the oil filter into the hydraulic pump, when it from the pump output into the pressure pipe, valve handle, stop the direction of a handle to the state, through the open stop valve, throttle valve, reversing valve into the hydraulic cylinder of the left cavity, push the piston and the working table moves to the right. At this time, the right chamber of the hydraulic cylinder oil by reversing valve and return line back to the oil tank. In order to overcome the various drag force when the mobile station is subjected to, the hydraulic cylinder must generate a large enough thrust, which is generated by the oil pressure in the hydraulic cylinder.. The higher the resistance, the higher the oil pressure in the cylinder, and the lower the pressure.. When the input of the hydraulic cylinder oil is regulated by a throttle valve, the hydraulic pump output of the excess oil shall be the overflow valve and an oil return pipe to the tank platoon, this only in the manifold pressure of the fluid pressure force of a relief valve ball is equal to or slightly larger than the relief valve spring preload and top oil to open overflow valve ball flows back to the tank. Therefore, in the system of hydraulic pump outlet oil pressure is determined by the relief valve, and it and the oil pressure in the cylinder is not as big as.
Keywords: excavator, hydraulic excavator, pump source, hydraulic station
目 錄
摘 要 II
Abstract III
目 錄 IV
第1章 緒論 1
1.1課題背景及目的 1
1.2 液壓挖掘機(jī)整機(jī)性能 1
1.3 液壓挖掘機(jī)結(jié)構(gòu) 2
1.4 液壓挖掘機(jī)傳動(dòng)原理 3
2 挖掘機(jī)泵源設(shè)計(jì)要求與方案 5
2.1設(shè)計(jì)要求 5
2.2工況分析 5
2.2.1 液壓挖掘工況分析 6
2.2.2 滿(mǎn)斗舉升回斗工況分析 8
2.2.3 卸載工況分析 8
2.2.4 空斗返回工況分析 9
2.2.5 行走時(shí)復(fù)合動(dòng)作分析 9
3 挖掘機(jī)液壓系統(tǒng)設(shè)計(jì) 11
3.1 挖掘機(jī)的功用和對(duì)液壓系統(tǒng)的要求 11
3.2 挖掘機(jī)液壓系統(tǒng)分析 11
3.2.1 挖掘機(jī)的液壓系統(tǒng)原理圖 11
3.2.2 系統(tǒng)工作分析 12
3.2.3 主要液壓元件在系統(tǒng)中的作用 13
3.3 液壓元件的選用 13
3.3.1 泵的選用 13
3.3.2 液壓閥的選用 13
3.3.3 液壓缸的選用 14
3.3.4 輔助元件的選用 14
4 液壓缸的設(shè)計(jì)計(jì)算和泵的參數(shù)計(jì)算 16
4.1 液壓缸設(shè)計(jì)算 16
4.1.1 外負(fù)載計(jì)算 16
4.1.2 液壓缸結(jié)構(gòu)尺寸計(jì)算 17
4.1.3 油缸強(qiáng)度計(jì)算 18
4.2 泵的參數(shù)計(jì)算 20
4.2.1 泵的壓力計(jì)算 20
4.2.2 計(jì)算所需要的泵的流量 21
4.3 柴油機(jī)的選擇 22
4.3.1 泵的驅(qū)動(dòng)功率的計(jì)算 22
4.3.2 柴油機(jī)的選擇 22
5 液壓集成塊的設(shè)計(jì) 23
5.1塊式集成的結(jié)構(gòu) 24
5.2塊式集成的特點(diǎn) 24
5.3塊式集成液壓控制裝置的設(shè)計(jì) 25
6 液壓站的設(shè)計(jì) 29
6.1液壓站簡(jiǎn)介 29
6.2 油箱設(shè)計(jì) 29
6.2.1油箱有效容積的確定 29
6.2.2 油箱容積的驗(yàn)算 30
6.2.3 油箱的結(jié)構(gòu)設(shè)計(jì) 32
6.3 液壓站的結(jié)構(gòu)設(shè)計(jì) 35
6.4 輔助元件 35
6.4.1 濾油器 35
6.4.2 空氣濾清器 36
6.4.3 液位計(jì) 37
6.4.4 液壓油 38
總結(jié) 40
參考文獻(xiàn) 41
致 謝 42
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