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  • 耐腐蚀氟塑料泵和不锈钢泵性能有什么区别呢?
  • 本站编辑:缘循智能科技(上海)有限公司发布日期:2019-04-09 09:50 浏览次数:

氟塑料泵和不锈钢泵都是具有耐腐蚀性能泵,氟塑料泵一般分为,氟塑料离心泵,氟塑料磁力泵,氟塑料合金泵。不锈钢泵可分为,不锈钢离心泵,不锈钢磁力泵。氟塑料泵和不锈钢泵都有立式结构和卧式结构,具有自吸,磁力,离心等形式,那么这两种耐腐蚀泵在性能上有什么区别呢?氟塑料材质又称为塑料王,可输送任意浓度的强酸,强碱,强腐蚀溶液,一般不锈钢材质适合输送轻腐液体,不锈钢泵耐温耐磨效果较好,氟塑料泵耐腐蚀效果好,这是整体性能的优缺地方。从结构上面,由于不锈钢泵与塑料泵性能上的差异,不锈钢泵的结构设计有以下特殊性。

Fluoroplastics pumps and stainless steel pumps are corrosion-resistant pumps, fluoroplastics pumps are generally divided into fluoroplastics centrifugal pumps, fluoroplastics magnetic pumps, fluoroplastics alloy pumps. Stainless steel pump can be divided into stainless steel centrifugal pump, stainless steel magnetic pump. Fluoroplastics pump and stainless steel pump have vertical and horizontal structure, with self-priming, magnetic, centrifugal and other forms, so what is the difference in performance between the two anti-corrosion pumps? Fluoroplastics material, also known as plastic king, can transport any concentration of strong acid, strong alkali, strong corrosive solution. Generally, stainless steel material is suitable for conveying light rotten liquid. Stainless steel pump has better temperature resistance and wear resistance, and fluoroplastics pump has good corrosion resistance, which is the advantage and disadvantage of the overall performance. Structurally, due to the difference in performance between stainless steel pump and plastic pump, the structural design of stainless steel pump has the following particularities.

氟塑料泵

Fluoroplastic pump

一、叶轮与轴的连接形式

I. Connection Form of Impeller and Shaft

1、叶轮内预埋金属件,通过金属件与轴用键连接,或叶轮与轴直接用键连接,叶轮端部用叶轮螺母保护。此结构来源于金属泵,由于密封面多,可靠性较差。长时间使用后,轴易被介质腐蚀。

1. The metal parts embedded in the impeller are connected with the shaft by keys, or the impeller is directly connected with the shaft by keys, and the end of the impeller is protected by impeller nuts. This structure comes from metal pump, because of many sealing surfaces, the reliability is poor. After a long time of use, the shaft is easily corroded by medium.

2、叶轮内预埋金属件,与泵轴用螺纹连接,取消叶轮螺母。此结构可使轴完全受到保护,避免轴被介质腐蚀的可能。缺点是螺纹加工精度要求较高,运转时严禁电动机反转。

2. The metal parts embedded in the impeller are connected with the pump shaft by threads, and the impeller nuts are cancelled. This structure can protect the shaft completely and avoid the possibility of the shaft being corroded by the medium. The disadvantage is that the thread processing accuracy is required to be high, and motor inversion is strictly prohibited when running.

不锈钢泵

Stainless steel pump

二、泵体衬里层厚度及其固定

2. Thickness and Fixation of Pump Body Lining Layer

按泵企业标准,衬里层厚度一般为5-8mm,如果衬里层过薄(如1.5~2mm),是压制过程易出现局部衬里缺陷,导致泵的允许使用温度和使用寿命有所下降,衬里层从泵体和后盖基体金属脱落的可能性也增大。

According to pump enterprise standards, the thickness of lining layer is generally 5-8 mm. If the lining layer is too thin (e.g. 1.5-2 mm), local lining defects are likely to occur during the pressing process, resulting in a decrease in the allowable operating temperature and service life of the pump, and the possibility of the lining layer falling off from the base metal of the pump body and back cover is also increased.

衬里层固定方式可采取在基体金属上布置较密的环形燕尾槽的方法,使衬里层固定牢靠,同时机加工量较小。也可用基体金属上布置较密小孔(或螺纹孔)的方法,衬里层固定不如燕尾槽牢靠。

The method of fixing the lining layer can adopt the method of arranging dense annular dovetail groove on the base metal, so that the lining layer can be fixed firmly and the machining quantity is small. It can also use the method of arranging denser holes (or threaded holes) on the base metal. The lining layer is not as fixed as the swallow tail groove.

氟塑料泵

Fluoroplastic pump

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三、接口

Three, interface

塑料泵进出口的接管的受力目前尚未有相关的标准加以限定,一般由设计单位提出要求,并根据制造厂自身的制造情况而定。对于整体塑料泵壳,一般采用活套法兰方式与管道连接,活套法兰与两端盖板连接;还可采用把法兰与盖板做成整体的方式与管道连接。

At present, there is no relevant standard to limit the force on the inlet and outlet nozzles of plastic pumps. Generally, it is required by the design unit, and it depends on the manufacturing conditions of the manufacturer itself. For integral plastic pump shell, looper flange is usually used to connect with pipeline, looper flange is connected with both ends of cover plate, and flange and cover plate can also be used to make integral connection with pipeline.

四、叶轮密封处和背叶片与泵体的运转间隙

4. Operating Clearance between Impeller Seal and Back Blade and Pump Body

因塑料和玻璃钢的线胀系数比钢大2~6倍,沿用不锈钢泵的运转间隙易发生咬合,使泵损坏。间隙过大又会使泵的效率降低,并造成泵轴向力的不平衡。由于径向间隙不可调节,也可考虑采用轴向间隙,这样无需拆泵,即可检查并调节运转间隙,为了防止温度变化引起的塑料泵壳上脱落或开裂,可考虑在泵壳上焊接龟甲丝网,从而使得衬塑泵可以做到较大规格型号,进口管径可达DN600。

Because the linear expansion coefficient of plastics and FRP is 2-6 times larger than that of steel, it is easy to bite along the running clearance of stainless steel pump, which causes damage to the pump. Excessive clearance will reduce the efficiency of the pump and cause the unbalance of the axial force of the pump. Because the radial clearance is not adjustable, the axial clearance can also be considered, so that the operating clearance can be checked and adjusted without dismantling the pump. In order to prevent the plastic pump shell from falling off or cracking caused by temperature change, the tortoise shell wire mesh can be welded on the pump shell, so that the lining pump can achieve a larger size and the diameter of the inlet pipe can reach DN600.

五、轴向平衡力

V. Axial Equilibrium Force

氟塑料泵的叶轮内埋有金属件,一般不宜用平衡孔的方法平衡轴向力。国内外普遍采用背叶片平衡轴向力。

Metal parts are embedded in the impeller of fluoroplastics pump. Generally, it is not appropriate to balance the axial force by means of balancing holes. Back blade balancing axial force is widely used at home and abroad.