液壓萬能試驗機主要結構可分為兩大部分：（液壓）加荷系統(tǒng)和測量系統(tǒng)。加荷系統(tǒng)通過油缸活塞把力傳遞給固定在試驗臺下面的負荷傳感器，由負荷傳感器把力信號轉換成電信號傳送給測量系統(tǒng)。通過測量系統(tǒng)對數(shù)據(jù)進行處理、分析，從而得出試驗結果。

Hydraulic universal testing machine is mainly the structure can be divided into two parts:(hydraulic) loading system and the measuring system. Loading system to load sensor force to the fixed under test by a piston, the force by the load sensor signals into electrical signalstransmitted to the measuring system. By measuring system for processing, analysis of data,so that the test results.

液壓萬能試驗機的度盤指針靈敏性差，卸荷后有中途停止現(xiàn)象，或者零點位置經常變動。此種現(xiàn)象的產生原因是多方面的。齒桿上的滑輪及其道軌灰塵過多、銹蝕。此時需要卸下清洗干凈，再加少許鐘表油。指針轉動軸臟，應清洗。齒桿壓片和齒桿之間有接觸，應調松。緩沖器回油情況不良，應加以調整或清洗。測力活塞上的皮帶脫落或太松（使活塞不能勻速運轉）。測力活塞在油缸內摩擦力增大或卡死現(xiàn)象，應用氧化鉻研磨膏對研，直至正常為止。擺錘在揚起過程中有阻礙物，或者擺軸太臟或銹蝕，使指針回零變動大。

Dial pointer sensitivity of hydraulic universal testing machine, unloading after the stop, orzero locations often change. Reasons for this phenomenon are in many aspects. Pulley gearrod and track too much dust, rust. Remove the washed clean, add a little oil for watch and clock. The pointer shaft dirty, should be cleaned. A contact between the gear lever cover andgear lever, should loosen. Buffer oil return the situation is bad, should be adjusted or cleaning. The force on the piston belt off or loose (the piston can not uniform speed). Force measuring piston in the oil cylinder friction increases or stuck phenomenon, application ofchromium oxide grinding paste on the research, until the normal. The pendulum in the raiseprocess has obstacles, or just too dirty or corroded, the pointer back to zero changes.

拉伸試驗是材料力學性能測試中的重要實驗。傳統(tǒng)的拉伸實驗采用的設備一般都是液壓萬能試驗機。隨著電測電控技術在試驗機上的廣泛應用，市場上相繼開發(fā)了微機控制電子萬能試驗機和微機控制液壓伺服萬能試驗機。微機控制液壓萬能試驗機仍然采用液壓油作為動力源，與老式液壓萬能試驗機不同之處是采用液壓加荷與微機系統(tǒng)相結合的技術，利用計算機對試驗進行數(shù)據(jù)采集、數(shù)據(jù)處理及圖形顯示，從而使試驗機功能更完善，操作更便捷，數(shù)據(jù)更準確。另外，微機液壓伺服萬能試驗機與微機電子萬能試驗機比較，其的優(yōu)點是動力性強，加荷范圍寬。

The tensile test is an important test of mechanical properties of materials. The traditional tensile test of the equipment are generally hydraulic universal testing machine. With the wideapplication of electronic technology in electric measurement test machine, the market hasdeveloped a microcomputer control electronic universal testing machine and computer control hydraulic servo universal testing machine. Microcomputer control hydraulic universal testing machine still adopts the hydraulic oil as power source, the difference with the oldhydraulic universal testing machine is using the hydraulic loading and microcomputer system combines the technology, data acquisition, data processing and graphics to the test by computer, so that the testing machine function is more perfect, more convenient operation,more accurate data. In addition, comparison of micro hydraulic servo universal testing machine and micro electronic universal testing machine, its biggest advantage is the stronger power, wide range of loading.

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