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立式渣浆泵的常用结构

作者:admin 发布日期:2022-08-06 09:58:51 关注次数:21

立式渣浆泵的常用结构

根据使用的现场安装条件、水力性能、汽蚀性能、维修拆卸、吸人方式、涡室形式、轴承形式和标准内容等方面的要求,立式泵的结构可设计为如下的结构型式。

(1) 首级单吸泵结构  首级单吸泵结构如图5-44 ~图5-50、图5-52所示。

(2)首级双吸泵结构立式首级双吸泵结构如图5-51所示。

(3)单壳体立式泵结构单壳体立式泵结构如图5-44 ~图5-47、图5-49、图5-52 所示。

(4)双壳体立式泵结构双壳体立式泵结构如图5-48、图5-50、图5-51所示。

(5)带推力轴承立式泵结构泵本身带推力轴承结构如图5-45~图5-47、图5-50、图5-51所示。

(6)不带推力轴承立式泵结泵本身不带推力轴承,轴向力由电动机承受的结构如图5-44、图5-48、图5-49、图5-52所示。

(7)蜗形体立式泵结构蜗形体立式泵结构如图5-45、图5-46、图5-51
  所示。
(8)导叶式涡室立式泵结构导叶式涡室分为径向导叶和空间(扭曲)式导

对于以上三种泵运行工况,可采取不同的泵机组长度。对于第一、第二种工况,我们将采用短结构泵机组(见图5-46)。 为了达到目的,满足工况要求,可在泵吸入口前加一根吸管以增加插深度,充分利用泵的自身的吸上能力(吸程),将槽、罐、水池液体吸尽或维持低液面的连续运行。这种泵设计时,叶轮应为无平衡孔结构,故轴向力大些,如果叶轮有平衡孔的话,泵就实现不了吸上能力。这种泵机组缩短了主轴长度,增强了泵机组刚性,运行平稳可靠,寿命较长,造价低廉,经济合理,可以用于5~6m或7~8m深的槽、罐、水池中。

而对于第三种工况,泵不得不采用长结构机组(见图5-45),根据情况在中间加一个或几个导轴承。如果泵扬程高,还要在其叶轮后盖板加开平衡孔,以减小轴向力。由于机组长,泵运行时有可能出现不稳定,产生振动、噪声等情况,故此泵的寿命较短或摩擦件相对更换要频繁。  

Common structure of vertical slurry pump

According to the requirements of on-site installation conditions, hydraulic performance, cavitation performance, maintenance and disassembly, suction mode, vortex chamber form, bearing form and standard content, the structure of vertical pump can be designed as follows.

(1) The structure of the first stage single suction pump is shown in Fig. 5-44 ~ Fig. 5-50 and Fig. 5-52.

(2) The structure of the first stage double suction pump is shown in Fig. 5-51.

(3) Structure of single shell vertical pump structure of single shell vertical pump is shown in Fig. 5-44 ~ Fig. 5-47, FIG. 5-49 and Fig. 5-52.

(4) Double shell vertical pump structure the double shell vertical pump structure is shown in Fig. 5-48, FIG. 5-50 and Fig. 5-51.

(5) Vertical pump structure with thrust bearing the structure of the pump with thrust bearing is shown in Fig. 5-45 ~ Fig. 5-47, FIG. 5-50 and Fig. 5-51.

(6) Vertical pump structure without thrust bearing the pump itself does not have thrust bearing, and the structure of axial force borne by the motor is shown in Fig. 5-44, FIG. 5-48, FIG. 5-49 and Fig. 5-52.

(7) Volute vertical pump structure: the volute vertical pump structure is shown in Fig. 5-45, FIG. 5-46 and Fig. 5-51

As shown in.

(8) Guide vane type volute vertical pump structure guide vane type volute is divided into radial guide vane and spatial (twisted) guide vane

For the above three pump operating conditions, different pump unit lengths can be adopted. For the first and second working conditions, we will use short structure pump unit (see Fig. 5-46). In order to achieve the purpose and meet the working condition requirements, a suction pipe can be added in front of the pump suction port to increase the insertion depth, and make full use of the pump's own suction capacity (suction range) to suck up the liquid in the tank, tank and pool or maintain the continuous operation of low liquid level. In the design of this kind of pump, the impeller should be of a structure without balance holes, so the axial force is larger. If the impeller has balance holes, the pump cannot achieve the suction capacity. This pump unit shortens the length of the main shaft, enhances the rigidity of the pump unit, operates stably and reliably, has a long service life, low cost, and is economical and reasonable. It can be used in 5 ~ 6m or 7 ~ 8m deep tanks, tanks and pools.

For the third working condition, the pump has to adopt a long structure unit (see Fig. 5-45) and add one or several guide bearings in the middle according to the situation. If the pump head is high, a balance hole shall be added to the rear cover plate of the impeller to reduce the axial force. As the unit leader, the pump may be unstable during operation, resulting in vibration and noise. Therefore, the service life of the pump is short or the friction parts are relatively replaced frequently.




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