三螺杆泵的使用说明

时间:2015-07-07 作者:天一泵业 

 1、概述 Brjef description

三螺杆泵包括 3G通用型,3GC船用型及特殊型。三螺杆泵是转子式容积泵,由于主动螺杆与从动螺杆上螺旋槽相互啮合及它们与衬套三孔内表面的配合,得以在泵的进出口之间形成数级动密封腔室,这些动密封腔室将不断把液体由泵进口轴向移动到泵出口,并使所输液体逐级升压,从而形成一个连续、平稳、轴向移动的压力液体。

The three spindle screw pumps consist of general design type 3GC and three screw pumps of special design.The three spindle screw pump is a positive displacement rotary pump. Inside the pump casingas the flanks of teeth of drive screw and idler screws are engaged and the screws are also matched with the three inset holes several sealed moving chambers are thereby formed in-between the pump inlet and outlet end. These closed chambers will take the medium inside to move from the inlet end axially and let flow pressurized progressivelyto have a continuousconstantaxial flow pressured liquid.

螺杆泵所输液体为各种不含固体颗粒,无腐蚀性油类及类似油的润滑性液体,所输液体粘度为1.2~100°E 3.0~760cst),高粘度液体亦可通过高温降粘后输送。

流量范围0.2~590 m³/h,最高工作压力100bar,最高温度150℃。

The three spindle screw pumps are suitable for pumping various kinds of non-corrosive oil without contents of solid grains and liquids similar to lubricating oilsthe viscosity of mediums to be conveyed range from 1.2 to 100°E3.0 to 760 cst),liquid with a higher viscosity could also

be pumped after heating uplowering down the viscosity.

The flow range is 0.2~590m³/h, and the maximum working pressure is 100 barthe highest temperature is 150.

2、结构特点Structure characteristics

                 1drawing 1

2.1结构简单:具有多种结构形式,一般小流量0.2~6.5m³/h,泵的泵体和衬套合为一体(统称泵体),轴封为机械密封(如:图1)。中等流量以上的泵衬套为一单独的零件固定

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于泵体内,大流量泵多制成双吸结构卧式安装,轴封根据输送介质的不同有机械密封和填料密封两种(如:图2)。

Simple in constitutionThe pump has quite a few construction forms. General for small flow range 0.2-6 5 m³/hpump casing and insert is made in one part. Mechanical seal is used as

the pumps shaft sealdrawing 1. Pumps of middle and big flow range have a separate insert to be fixed in side the pump casing.Big pumps are mostly of a double – suction design for horizontal installation.  For different mediums to be pumped mechanical seals or packing seals could be supplieddrawing 2.

                   

1、泵体 pump casing            2、衬套 liner

3、螺杆 screw spindle           4、下盖 lower cover

5、上盖 upper cover            6、密封盖  cover of seal

7、安全阀 felief valves

               2drawing 2

  船用泵的安装形式有卧式和立式两种,原动机为交、直流船用电动机。

For marine application pumpsinstallation forms could be horizontal and verticalwith marine AC and DC drivers.

2.2寿命长:三螺杆泵的主动螺杆由电动机驱动,生、从杆之间没有机械接触,而由所输压力液体驱使从杆绕轴心线自转,主、从杆之间、螺杆与衬套之间皆有一层油膜保护,因而泵的机械摩擦极小,寿命堪称半永久性。

Long life timeAs the drive screw is driven by motor and there is no mechanical contact between the drive screw and the idler screwsthe idler screw are hydranliclally driven by the pressured liquidbetween the drive screw and idler screwscrews set and insert an oil film is formed so the mechanical friction is minimized and a longer life is ensured.

2.3所输送的液体在泵内作轴向匀速直线运动,故压力脉动小,流量稳定,噪音低,由于转动部件惯性小,则起动力矩和振动很小。

The medium to be pumps is in a manner of constant axial flow movementso the pressure pulsation is almost eliminatedmeanwhile the noise is loweredand as the moving parts have a very little inertiathe starting torque and vibration is very little.

2.4具有高吸入能力。

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       Pump haves a very high suction capability.

2.5为保证泵,电机及管路系统的安全,中等流量以上的螺杆泵均带有安全阀,当压力超过安全阀的设定压力后,高压油将回流到泵的进油口。

In order to ensure the safe working of pumpmotorpiping systempumps for a capacity higher thean middle flow range are all equipped with safety values. When working pressure is exceeding the setting pressure of valuespressured oil will circulate back to suction chamber.

3、材料组合 Materical

材料组合代码

Material code

泵体

Casing

衬套

Insert

适用范围

Using range

W1

 

HT200

Cast iron

稀土铜钼球铁

Special modular

Cast iron

可低压输送润滑性较差,黏度适当的液体,如燃油等

Used to pump the mediumsuch as fuel oilwith less lubricant and suitable viscosity at lower pressure

W2

HT200

Cast iron

Z1109

Cast Al

可低压输送润滑性好,黏度适当的液体,如润滑油等

Used to pump the mediumsuch as lubricant oilwith better lubricant and suitable viscosity at lower pressure

W3

QT450-10

Nodular cast iron

Z1109

Cast Al

用于特殊场合(如船用泵)低压输送润滑性较好,黏度适当的液体,如润滑油等Used in particular case such as marine pumpto pump the mediumsuch as lubricant oilwith better lubricant and suitable viscosity at lower pressure

W4

QT450-10

Nodular cast iron

稀土铜钼球铁

Special modular

Cast iron

用于特殊场合(如船用泵)低压输送润滑性较差,黏度适当的液体,如燃油等Used in particular case such as marine pumpto pump the medium with less lubricant and suitable viscosity at fuel oil at lower pressure

W21

HT200

Cast iron

ZCuSn5Pb5Zn5

Special bronze

可在较高压力下输送润滑性较差,粘度较低的液体,如重油、燃油等。Used to pump the medium with less lubricity and lower viscositysuch as heavy oil and fuel oil

W23

Qt450-10

Nodular cast iron

ZCuSn5Pb5Zn5

Special bronze

用于特殊场合(如船用泵)有较高压力下输送润滑性较差,粘度较低的液体,如重油、燃油等。Used in particular casesuch as marine pumpto pump the medium with less lubricity and lower viscositysuch as heavy oil and fuel oilat higher pressure

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4、系列说明 System code

系列特征

Serise

系列代码

Figure

结构型式

Construction form

适用范围

Main application

性能范围 Specifications

流量Capac

最高工作压力Max. pre

滑油系列

For Lub. oil

3G

3GC

卧式   单吸

Single suction horizontal installation

20~150cst润滑油类及润滑性液体

Lub. Oil or lub liquid Visc.20~150cst

0.0-94

m³/h

60

bar

3G

3GCS

卧式   双吸

Double suction horizontal installation

80-590

16

3GCG

立(悬挂)式 单吸

Single suction hanging installation

80-590

8

3GCL

立式柱脚型  单吸

Single suction Vertical pedestal

4-96

8

3GCLS

立式柱脚型  双吸

Double suction Vertical pedestal

88-306

8

燃油系列

For fuel. oil

3Gr

3GCSr

 

卧式   单吸

Single suction horizontal installation

3~365cst轻重质燃油类

Light oil heavy oil

Visc.3~365cst

0.3-94

601

252

3GSr

3GCSr

 

卧式   双吸

Double suction horizontal installation

80-590

16

高粘油系列

For high visc. fuel oil

3GN

卧式   单吸

Single suction horizontal installation

365760cst高粘油类

High Visc. Fuel oil Visc365~760cst

1.0-40

25

注解:(1)适用于重质燃油类  for Heavy oil

     2)适用于轻质燃油类  for Light oil

53G螺杆泵输送各种油类时应注意事项

The following points are to be noted for conveyance of oil by three Screw Pumptype 3G

5.1输入40-150m/s的油类最合适,允许按泵的最高工作压力使用。

The pump is most suitable for conveying oils with viscosity of 40~150m/sapplication

Of the maximum working pressure of pump is permissible.

5.2输送40m/s以下的油类,为保证泵的流量及寿命应降压使用。

When the oil viscosity is below 40 m/spressure should be reduced. In application to

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ensure the flow and life of the pump.

5.3输送150m/s以上的油类,且进油管道过长,弯头过多,泵工作时如产生噪音或振动现象,则应考虑更换低一级的转速的电机运转或缩短吸入管道,减少弯头。

When conveying oil with viscosity 40 m/sand the oil inlet pipe is too longwith too many bendsif noise and vibration was happened when the pump operating consideration should be taken to use a motor with lower revolution or to shorten the suction piping and reduce the number of bends.

5.4 3G三螺杆泵轴伸支承较小,应由原动机经弹性联轴器直联驱动,不得用皮带轮等会产生额外径向力较大的传动方式传动。

The support for shaft extension of three Screw Pump is comparatively smallit should be driven directly by motor though the coupling. Driving by belt pulley and other means of comparatively large radial force is not to be employed.

63G螺杆泵安装要求Installation requi rements of therr screw pump type 3G

  6.1安装前应检查螺杆泵 的油封是否良好,并检查泵在运输中是否损坏,可用手转动联轴器是否有卡劲现象,如有则应拆泵进行清洗,修理和校正。

Bethre installationthe oil seal of the pump should be checked. To see if it is in orderand inspect whether the pump is damaged in transit. Turn the coupling with hand to see if it is blockedif sothe pump should be dismantled for cleaningrepair and adjustments.

6.2安装螺杆泵 的进油和排油管道时,其管径不得小于泵的进油和排油口口径,进油管道不得过长,弯头不得过多,否则将影响泵的工作状态。

When installing oil inlet and oil discharge Pipingthe diameters of pipes which should not be smaller than the oil inlet and oil outlet of the pump respectively. The oil inlet piping should not be too longshould not have too many bendsotherwise the function of the pump will be affected.

6.3当有两台以上的螺杆泵 安装在同一条主管线上,为便于泵的启动,在近泵的排油管上必须安装逆止阀。

In case two sets or more pumps are installed on one main line. Value must be installed close to the oil discharge pipe of the pump so as to facilitate starting of the pump.

6.4对于在较高温度(60以上)下输送粘度大的油类(如:重油)的备用泵,必须是热备用泵,否则泵在低温下启动会电机过载或泵损坏,(建议在靠进泵的排油管上的逆止阀旁,并联安装一个小回流阀,对备用阀可微启回流阀,使螺杆泵 缓慢逆转,其你转速≤100/分,使部分热油经常流过泵内,达到泵热备用目的)。

When conveying oil of comparative high viscositysuch asheavy oilunder higher temperatureabove 60℃)by a spare pumpsthe spare pump must be heated. Otherwise starting of pump under low temperature will cause overload of motor or damage pipe to the pump It is suggested that a small return may be slingtly opened to spare pump .causing slow

reversal of the pump at a speed of 100r.p.mthus allowing part of the hot oil frequently flow

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though the pump ready for use.

6.5输送介质内含有机械杂质,将严重影响螺杆泵 的运转和降低使用寿命,因此在泵安装前,必须仔细清除进油管内的焊渣,沙粒等杂质,并应在进油管道靠近泵处安装滤器,滤器网孔大小,可根据工作情况及杂质粘度确定,(一半可用40-80目网),过滤面积一半不得小于进油管横截面积的20倍。

Any mechanical foreign matters containing in the conveyed medium will affect the operation and drop life of application of the pumpthere forethe inner part of the oil inlet piping must be carefully and thoroughly cleaned of the solder slagsand and other foreign matters before installation of the pump Besidesa filter should be installed on the oil inlet piping at a point close

to the pump the mesh of the filtering screen maybe determined According to the working condition and the viscosity Of the medinm generally 40~80 mesh may be used. The filtered area should in the main not be smaller than 20 tines the area of cross section other oil inlet pipe.

6.6尽量在螺杆泵 进油和排油口处的螺纹孔上连接压力表和真空表。以便于观察泵的运转状态。

As can as possible to fit a pressure gauge and a vacuum gauge on the threaded hole of the oil inlet and oil outlet to facilitate observation of the operation condition of the pump.

6.7原动机与螺杆泵 的转轴必须在同一中心线上,可用直尺测隙规在联轴器圆周上间隔90°处检查。

The rotation shafts of motor and the pump must be on the same center line. Pump must be on the same center linethis may be inspected by using a edge clearance gauge putting on the circumference of the coupling of the coupling at an interval of 90°.

6.8原动机与螺杆泵 的转向必须一致,严格禁止原动机驱动泵逆转,电机接线时,应先脱开电机与泵的联轴器,对电机作试运转,使其转向与泵的转向标志一致。

The rotation direction of the motor must coincide with the pump. The actuation of pump by coupling connecting the Motor and the pump must be first disconnectedcenduct trial run of the motorto make its rotation direction same with the pump.

73G三螺杆泵的使用和维护Application and malitenance of three screw pump type 3G

7.1螺杆泵启用前,必须全开进油和排油闸阀。

The oil inlet and oil outlet gates and values must be complete opened before starting the Pump.

7.2首次启动螺杆泵或再次使用长期封腔灌注适量输送介质,避免泵干启动。

During initial start of the pump or restart of the pump after long period sealed up for safekeeping from operationand no medium is inside the pumpapproriate quantity of medium should be filled into the pump through the oil inlet opening in order to avoid dry running.

7.3螺杆泵启动后,应密切注意电流表,压力表和真空表的数值,超出规定值时,应停泵找出原因后,再行启动。

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After the pump is started the values of ammeterpressure gauge and vacuum gauge should be well noted. If exceeding the specified valuesthe pump should be stopped and restarted after the fault is detected.

7.4轴封处点滴泄露,应属于正常现象。当泄漏量大量增加时,对软填料密封应压紧填料压盖,对机械密封应停泵修复后,再行启动。

Slight leakage at the point of shaft seal is considered normal condition. Incase of leakage increasing heavilythe gland box of soft packing should be tightly pressedand the pump is to be righted after stopping and the mechanical seal repaired.

7.5用高温蒸汽清扫管线时,应避免高温蒸汽通过泵内。

When using high temperature steam to blow out the pipelinecare should be taken not to admit the high temperature steam into the pump.

7.6如果螺杆泵长期不工作时,应进行油封,并定期检查油封情况,必要时重新油封。

In case the pump is sealed up for safekeeping from operation for longer the condition of oil sealedsealed the condition of oil seal should be periodically inspected and be replaced when necessary.

83G型三螺杆泵的主要故障及消除方法

The main troubles of three screw pump type 3G and methods of elimination

 

 

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