無論是發(fā)電機(jī)組的進(jìn)氣門還是排氣門，都需要保證在惡劣條件下能夠穩(wěn)定工作，并且要求氣門具有足夠的強(qiáng)度、耐磨性和耐熱性；要求閥門重量輕，耐熱性好。閥門與閥座環(huán)的緊密接觸部分是閥錐面，應(yīng)具有較高的密封性能和耐磨性。

Whether the inlet valve or exhaust valve of the generator set, it is necessary to ensure that it can work stably under bad conditions, and the valve is required to have sufficient strength, wear resistance and heat resistance; The valve is required to be light in weight and good in heat resistance. The close contact part between the valve and the seat ring is the valve cone, which should have high sealing performance and wear resistance.

閥門和閥座環(huán)在工作過程中受高溫高壓氣體的沖擊和機(jī)械負(fù)荷的影響，容易燒蝕磨損。閥門與閥座環(huán)的工作斜面，由于閥門的不斷開閉，相互碰撞、敲擊，并承受反復(fù)沖擊載荷，在工作斜面上造成磨損、凹槽、斑點(diǎn)和凹陷。

The valve and seat ring are easily ablated and worn due to the impact of high temperature and high pressure gas and mechanical load during operation. Due to the continuous opening and closing of the valve, the working slope of the valve and the valve seat ring collides and knocks with each other, and bears repeated impact loads, resulting in wear, grooves, spots and depressions on the working slope.

發(fā)電機(jī)組閥桿在氣門導(dǎo)管內(nèi)移動(dòng)時(shí)不斷摩擦，潤滑條件差，加之灰塵和磨料，使兩者都磨損。積碳進(jìn)入氣門導(dǎo)管，加速氣門桿和導(dǎo)管之間的磨損。氣門桿尾端與搖臂發(fā)生碰撞，造成兩者磨損。

When the valve stem of the generator set moves in the valve guide, it is constantly rubbed, and the lubrication conditions are poor. In addition, dust and abrasive wear both. Carbon deposits enter the valve guide and accelerate the wear between the valve stem and the guide. The tail end of the valve stem collides with the rocker arm, causing wear.

氣門頂部受到氣缸內(nèi)的氣體壓力，氣門桿的尾端通過挺桿被凸輪撞擊，使氣門桿彎曲。氣門頂與活塞碰撞，使氣門桿彎曲。氣門桿端面搖臂間隙過小。熱膨脹后抵抗閥桿端部使其彎曲，端面凹凸不平。

The top of the valve is subjected to the gas pressure in the cylinder, and the tail end of the valve stem is hit by the cam through the tappet to bend the valve stem. The valve crown collides with the piston, causing the valve stem to bend. The rocker arm clearance at the end face of the valve stem is too small. After thermal expansion, it resists the end of the valve stem to bend, and the end face is uneven.

發(fā)電機(jī)組閥門或閥座環(huán)的工作面與閥桿不同心，閥座與氣門導(dǎo)管不同心，導(dǎo)致閥桿彎曲。氣門桿和氣門導(dǎo)管磨損后，配合間隙增大，氣門桿在管內(nèi)擺動(dòng)使氣門偏斜，造成氣門頭偏磨。當(dāng)閥桿彎曲時(shí)，它會(huì)在閥門頂部產(chǎn)生歪斜和偏移。

The working surface of the generator set valve or valve seat ring is not concentric with the valve stem, and the valve seat is not concentric with the valve guide, resulting in the bending of the valve stem. After the valve stem and valve guide are worn, the fit clearance increases, and the valve stem swings in the pipe to deflect the valve, resulting in eccentric wear of the valve head. When the valve stem is bent, it will skew and offset the top of the valve.

發(fā)電機(jī)組閥桿磨損嚴(yán)重，凹陷、變薄、彎曲嚴(yán)重的閥門一般不予重復(fù)使用。閥桿曲率超過0.03mm，閥頂歪斜超過0.02mm，可用壓力機(jī)修正修整，再用百分表檢查，直至符合要求。

The valve rod of the generator set is seriously worn, and the valve with depression, thinning and serious bending is generally not reused. If the curvature of the valve stem exceeds 0.03mm and the deflection of the valve top exceeds 0.02mm, it can be corrected and trimmed with a press and checked with a dial indicator until it meets the requirements.

發(fā)電機(jī)組閥桿磨損后，其圓度和圓柱度偏差超過0.03mm，當(dāng)直徑減小超過允許尺寸時(shí)，應(yīng)按修理尺寸研磨，或?qū)㈤y桿修理到標(biāo)準(zhǔn)尺寸或由鍍鉻或鍍鐵。

After the valve rod of the generator set is worn, its roundness and cylindricity deviation exceeds 0.03mm. When the diameter decreases beyond the allowable size, it shall be ground according to the repair size, or the valve rod shall be repaired to the standard size or plated with chromium or iron.

瓦斯發(fā)電機(jī)組閥桿長度必須符合標(biāo)準(zhǔn)。若閥桿尾端面磨損，應(yīng)按磨損的桿端面磨削。桿端的磨損量一般為0.50mm，以獲得光滑平整的平面。

The length of valve rod of gas generator set must meet the standard. If the end face of the stem tail is worn, grind it according to the worn end face of the stem. The wear of the rod end is generally 0.50mm to obtain a smooth and flat plane.

發(fā)電機(jī)組的發(fā)動(dòng)機(jī)氣門損傷維修事項(xiàng)便是如此了，如果您想更多內(nèi)容想了解就來網(wǎng)站www.a7716.cn咨詢吧！

This is the maintenance of engine valve damage of generator set. If you want more information, please visit www.huanengpower.com Com consultation!