4.2.1 Description of Codes 代码说明
The pumps described in this standard are classified and designated by type codes, as shown in Table 1.
表1表示泵的分类和代称。
==Table 1 Pump Classification Type Identification
表1—泵型分类标识==
4.2.2 Pump Designations and Descriptions泵的代号和描述
4.2.2.1 General一般
The figures that follow in this section are generic and informative. They are not meant to show construction details or specific features.
本节后面的图表是通用的，供参考的。它们并不是为了显示建造细节或具体特征。
4.2.2.2 Pump Type OH1 OH1泵型
Foot-mounted, single-stage overhung pumps shall be designated pump type OH1 (Figure 1). (This type does not meet all the requirements of this standard; see Table 3.)
底脚安装，单级悬臂泵，称为OH1（图1）（这种类型的泵不能全部满足本国际标准的所有要求，见表3）
解释：OH1泵型如下图
==Figure 1 Pump Type OH1==
==图1：OH1泵型==
4.2.2.3 Pump Type OH2 OH2泵型
Centerline-mounted, single-stage overhung pumps shall be designated pump type OH2 (Figure 2). They have a single bearing housing to absorb all forces imposed upon the pump shaft and maintain rotor position during operation. The pumps are mounted on a baseplate and are flexibly coupled to their drivers.
中心线安装，单级悬臂泵，称为OH2（图2）。有一个单独的轴承箱来吸收所有泵轴上的所有力，并且保持转子运行时的位置。泵安装在一个底座上，并通过弹性联轴器与驱动机相连。
==Figure 2 Pump Type OH2==
==图2：OH2泵型==
4.2.2.4 Pump Type OH3 OH3泵型
Vertical, in-line, single-stage overhung pumps with separate bearing brackets shall be designated pump type OH3 (Figure 3). They have a bearing housing integral with the pump to absorb all pump loads. The driver is usually mounted on a support integral to the pump. The pumps and their drivers are flexibly coupled.
立式的，与管道共线的，单级悬臂泵，带有单独轴承支架的泵型，称为OH3。轴承箱和泵是一体式的，来吸收泵的所有载荷。驱动机通常安装在一个与泵一体的支撑上。泵和驱动机通过弹性联轴器连接。
==Figure 3 Pump Type OH3==
==图3：OH3泵型==
4.2.2.5 Pump Type OH4 OH4泵型
Rigidly coupled, vertical, in-line, single-stage overhung pumps shall be designated pump type OH4 (Figure 4). Rigidly coupled pumps have their shaft rigidly coupled to the driver shaft. (This type does not meet all the requirements of this standard; see Table 3.)
刚性联轴器，立式的，与管道同轴线，单级悬臂泵，称为OH4。泵轴与驱动机轴为刚性连接（这种类型的泵不能全部满足本国际标准的所有要求，见表3）
==Figure 4 Pump Type OH4==
==图4：OH4泵型==
4.2.2.6 Pump Type OH5 OH5泵型
Close-coupled, vertical, in-line, single-stage overhung pumps shall be designated pump type OH5 (Figure 5). Close-coupled pumps have their impellers mounted directly on the driver shaft. (This type does not meet all the requirements of this standard; see Table 3.)
直接连接，立式的，与管道同轴线，单级悬臂泵，称为OH5。叶轮直接连接到驱动机轴上（这种类型的泵不能全部满足本国际标准的所有要求，见表3）
==Figure 5 Pump Type OH5==
==图5：OH5泵型==
4.2.2.7 Pump Type OH6 OH6泵型
High-speed, integral, gear-driven, single-stage overhung pumps shall be designated pump type OH6 (Figure 6). These pumps have a speed-increasing gearbox integral with the pump. The impeller is mounted directly to the gearbox output shaft. There is no coupling between the gearbox and pump; however, the gearbox is flexibly coupled to its driver. The pumps can be oriented vertically or horizontally.
高速，集成式，齿轮驱动，单级悬臂泵，称为OH6。这种泵有个增速箱，增速箱和泵一体式。叶轮直接安装在齿轮箱的输出轴上。齿轮箱和泵之间没有联轴器。齿轮箱通过联轴器与驱动机相连。这种泵可以是立式的或者水平的。
==Figure 6 Pump Type OH6==
==图6：OH6泵型==
4.2.2.8 Pump Type BB1 BB1泵
Axially split, one- and two-stage, between-bearings pumps shall be designated pump type BB1 (Figure 7).
轴向剖分，一级或者两级，两端支撑的泵，称为BB1
==a) Pump Type BB1-A “Foot Mounted” BB1-A 底脚安装==
==b) Pump Type BB1-B “Near-centerline Mounted” BB1-B 近中心线安装==
==Figure 7 Pump Types BB1-A and BB1-B==
==图7 BB1-A和BB1-B型泵==
4.2.2.9 Pump Type BB2 BB2泵型
Radially split, one- and two-stage, between-bearings pumps shall be designated pump type BB2 (Figure 8).
径向剖分，单级或两级，两端支撑的泵，称为BB2
==Figure 8 Pump Type BB2==
==图8：BB2泵型==
4.2.2.10 Pump Type BB3 BB3 泵型
Axially split, multistage, between-bearings pumps shall be designated pump type BB3 (Figure 9).
轴向剖分，多级，两端支撑的泵，称为BB3
==Figure 9 Pump Type BB3==
==图9：BB3泵型==
4.2.2.11 Pump Type BB4 BB4泵型
Single-casing, radially split, multistage, between-bearings pumps shall be designated pump type BB4 (Figure 10). These pumps are also called ring-section pumps, segmental-ring pumps, or tie-rod pumps. These pumps have a potential leakage path between each segment. (This type does not meet all the requirements of this standard; see Table 3.)
单壳体，径向剖分，多级，两端支撑泵，称为BB4。这种泵也称为节段泵或拉杆泵。这类泵存在级间泄漏的可能性。（这种类型的泵不能全部满足本国际标准的所有要求，见表3）
::: tip
解释：类似与串糖葫芦，每一节称为一个segment
:::
==Figure 10 Pump Type BB4==
==图10：BB4泵型==
4.2.2.12 Pump Type BB5 BB5泵型
Double-casing, radially split, multistage, between-bearings pumps (barrel pumps) shall be designated pump type BB5 (Figure 11).
双壳体，径向剖分，多级，两端支撑泵（也叫筒型泵），称为BB5
==Figure 11 Pump Type BB5==
==图11：BB5泵型==
4.2.2.13 Pump Type VS1 VS1泵型
Wet pit, vertically suspended, single-casing diffuser pumps with discharge through the column shall be designated pump type VS1 (Figure 12).
湿坑，立式悬吊，单泵壳导流壳泵，出口通过立管的泵，称为VS1
==Figure 12 Pump Type VS1==
==图12：VS1泵型==
4.2.2.14 Pump Type VS2 VS2泵型
Wet pit, vertically suspended, single-casing volute pumps with discharge through the column shall be designated pump type VS2 (Figure 13).
湿坑，立式悬吊，单壳体蜗壳泵，出口通过立管的泵，称为VS2
==Figure 13 Pump Type VS2==
==图13：VS2泵型==
4.2.2.15 Pump Type VS3 VS3泵型
Wet pit, vertically suspended, single-casing axial-flow pumps with discharge through the column shall be designated pump type VS3 (Figure 14).
湿坑，立式悬吊，单泵壳，轴流的泵，液体通过排出管排出，称为VS3泵。
::: tip
解释：类似于雨水池常用的泄流泵（斜流泵是离心和轴流的混合形式的泵）
:::
==Figure 14 Pump Type VS3==
==图14：VS3泵型==
4.2.2.16 Pump Type VS4 VS4泵型
Vertically suspended, single-casing, volute, line-shaft-driven sump pumps shall be designated pump type VS4 (Figure 15).
立式悬吊，单泵壳，蜗壳型，多轴共线驱动，坑泵，，称为VS4泵
==Figure 15 Pump Type VS4==
==图15：VS4泵型==
4.2.2.17 Pump Type VS5 VS5泵
Vertically suspended, cantilever sump pumps shall be designated pump type VS5 (Figure 16).
立式悬吊，悬臂坑泵，称为VS5
::: tip
解释：VS4和VS5很接近，VS4带导轴承，VS5没有
:::
==Figure 16 Pump Type VS5==
==图16：VS5型泵==
4.2.2.18 Pump Type VS6 VS6泵
Double-casing, diffuser, vertically suspended pumps shall be designated pump type VS6 (Figure 17).
双泵壳，导流壳，立式悬吊泵，称为VS6
::: tip
解释：VS6泵就是在VS1泵的基础上，增加了一个外壳
:::
==Figure 17 Pump Type VS6==
==图17：VS6泵型==
4.2.2.19 Pump Type VS7 VS7泵
Double-casing, volute or volute plus diffuser, vertically suspended pumps shall be designated pump type VS7 (Figure 18).
双泵壳，蜗壳或蜗壳加导流壳，立式悬吊泵，称为VS7
::: tip
解释：VS7泵，就是在VS2泵的基础上增加了一个外壳
:::
==Figure 18 Pump Type VS7==
==图18：VS7泵型==
