1. Anti corrosion protection of pump chamber: the form of metal corrosion can be divided into two categories: corrosion and local corrosion. The former occurs more evenly on all surfaces of the fan, while the latter only occurs locally. For example, pitting corrosion, crevice corrosion, intergranular corrosion, stress corrosion cracking, corrosion fatigue, hydrogen corrosion cracking, wear corrosion, delamination corrosion, etc. Especially in petroleum, chemical industry and marine atmospheric environment.

2、轉子軸鍵槽損傷：因為受設備運行環(huán)境等因螺桿鼓風機素的影響，羅茨風機經常出現軸頭、鍵槽磨損損壞現象，問題出現后，按照傳統(tǒng)方法要補焊或刷鍍后機加工修復。但是補焊高溫產生的熱應力無法全消除，容易出現彎曲或斷裂；電刷鍍受涂層厚度限制，容易剝落。

2. Rotor shaft keyway damage: due to the influence of screw blower elements such as equipment operation environment, roots blower often has shaft head and keyway wear and damage. After the problem occurs, it shall be repaired by welding or brush plating according to the traditional method. However, the thermal stress caused by high temperature of repair welding can not be completely eliminated, and it is easy to bend or fracture; Brush plating is easy to peel off due to the limitation of coating thickness.

3、殼體裂紋治理。羅茨風機部件因鑄造、加工缺陷或內應力、超負荷運行等原因經常導致設備部件出現裂紋或斷裂現象，常規(guī)的修復方法是采用焊接。焊無油螺桿鼓風機接常常會導致零件產生熱變形或熱應力，特別是薄壁件，而且有的零件材質是鑄鐵、鋁合金、鈦合金一類難焊材料。

3. Shell crack treatment. Cracks or fractures often occur in Roots blower components due to casting, processing defects or internal stress, overload operation and other reasons. The conventional repair method is welding. Welding oil-free screw blower connection often leads to thermal deformation or thermal stress of parts, especially thin-walled parts, and some parts are made of cast iron, aluminum alloy and titanium alloy.

檢查一下風機電機電流，先確定是否有問題，另外冷凝溫度是否超出。冷凝器是應該清洗。冷媒添加是否多。壓縮機排氣溫度是否高。電機保護器是否應該微調或更換。應從這幾個方面分析解決。有數據才好說。

Check the fan motor current to determine whether there is a problem and whether the condensation temperature is exceeded. The condenser should be cleaned. Whether the refrigerant is added more. Check whether the compressor exhaust temperature is high. Whether the motor protector should be fine tuned or replaced. It should be analyzed and solved from these aspects. It's hard to say with data.