現(xiàn)貨東京計(jì)器TOKIMEC換向閥DG4V-3-2A-U-H-100

日本株式會(huì)社東機(jī)美中國(guó)銷售代理

現(xiàn)貨東京計(jì)器TOKIMEC換向閥DG4V-3-2A-U-H-100

1）空穴產(chǎn)生的噪聲當(dāng)由于各種原因，空氣被吸入油液中，或者在油液壓力低于大氣壓時(shí)，溶解在油液中的部分空氣就會(huì)析出形成氣泡，這些氣泡在低壓區(qū)時(shí)體積較大，當(dāng)隨油液流到高壓區(qū)時(shí)，受到壓縮，體積突然變小或氣泡消失；反之，如在高壓區(qū)時(shí)體積本來較小，而當(dāng)流到低壓區(qū)時(shí)，體積突然增大，油中氣泡體積這種急速改變的現(xiàn)象。氣泡體積的突然改變會(huì)產(chǎn)生噪聲，又由于這一過程發(fā)生在瞬間，將引起局部液壓沖擊而產(chǎn)生振動(dòng)。先導(dǎo)式溢流閥的導(dǎo)閥口和主閥口，油液流速和壓力的變化很大，很容易出現(xiàn)空穴現(xiàn)象，由此而產(chǎn)生噪聲和振動(dòng)。

The noise generated when the hole due to various reasons, the air is sucked into the oil, or lower than the atmospheric pressure in the oil pressure, dissolved in the oil in the air will precipitate the formation of bubbles, the bubbles in the low pressure area is larger, when the oil flow to the high pressure area, is compressed, the volume suddenly become smaller or on the other hand, the bubble disappeared; as in the high pressure area was smaller when the volume, flow to the low pressure area, the volume suddenly increased, the oil bubble volume this rapid change phenomenon. Sudden change of bubble volume will produce noise, and because this process occurs in an instant, the impact will cause the local hydraulic vibration of the pilot valve port. Pilot type relief valve and the main valve port, the oil flow rate and pressure changes greatly, it is prone to cavitation, resulting in noise and vibration.

現(xiàn)貨東京計(jì)器TOKIMEC換向閥DG4V-3-2A-U-H-100

東京計(jì)器主要是用于沖壓機(jī)，通過電動(dòng)機(jī)驅(qū)動(dòng)飛輪，并通過離合器，傳動(dòng)齒輪帶動(dòng)曲柄連桿機(jī)構(gòu)使滑塊

沖壓機(jī)

上下運(yùn)動(dòng)，帶動(dòng)拉伸模具對(duì)鋼板成型。所謂的雙動(dòng)就是指壓力機(jī)有兩個(gè)滑塊，分為內(nèi)滑塊和外滑塊，內(nèi)滑塊帶動(dòng)模具的凸模或凹模，外滑塊帶動(dòng)模具上的壓邊圈，在拉伸時(shí)壓邊圈首先動(dòng)作壓住鋼板邊緣，內(nèi)滑塊再動(dòng)作進(jìn)行拉伸。

設(shè)計(jì)原理是將圓周運(yùn)動(dòng)轉(zhuǎn)換為直線運(yùn)動(dòng)，由主電動(dòng)機(jī)出力，帶動(dòng)飛輪，經(jīng)離合器帶動(dòng)齒輪、曲軸（或偏心齒輪）、連桿等運(yùn)轉(zhuǎn)，來達(dá)成滑塊的直線運(yùn)動(dòng)，從主電動(dòng)機(jī)到連桿的運(yùn)動(dòng)為圓周運(yùn)動(dòng)。

連桿和滑塊之間需有圓周運(yùn)動(dòng)和直線運(yùn)動(dòng)的轉(zhuǎn)接點(diǎn)，其設(shè)計(jì)上大致有兩種機(jī)構(gòu)，一種為球型，一種為銷型（圓柱型） ，經(jīng)由這個(gè)機(jī)構(gòu)將圓周運(yùn)動(dòng)轉(zhuǎn)換成滑塊的直線運(yùn)動(dòng)。沖壓機(jī)對(duì)材料施以壓力，使其塑性變形，而得到所要求的形狀與精度，因此必須配合一組模具（分上模與下模），將材料置于其間，由機(jī)器施加壓力，使其變形，加工時(shí)施加于材料之力所造成之反作用力，由沖壓機(jī)機(jī)械本體所吸收。