三螺桿泵的使用說明

時間:2015-07-07 作者:天一泵業 

 1、概述 Brjef description

三螺桿泵包括 3G通用型,3GC船用型及特殊型。三螺桿泵是轉子式容積泵,由于主動螺桿與從動螺桿上螺旋槽相互嚙合及它們與襯套三孔內表面的配合,得以在泵的進出口之間形成數級動密封腔室,這些動密封腔室將不斷把液體由泵進口軸向移動到泵出口,并使所輸液體逐級升壓,從而形成一個連續、平穩、軸向移動的壓力液體。

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 casing,as 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 progressively,to have a continuous,constant,axial flow pressured liquid.

螺桿泵所輸液體為各種不含固體顆粒,無腐蝕性油類及類似油的潤滑性液體,所輸液體粘度為1.2~100°E 3.0~760cst),高粘度液體亦可通過高溫降粘后輸送。

流量范圍0.2~590 m³/h,最高工作壓力100bar,最高溫度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 oils,the 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 bar,the highest temperature is 150.

2、結構特點Structure characteristics

                 1drawing 1

2.1結構簡單:具有多種結構形式,一般小流量0.2~6.5m³/h,泵的泵體和襯套合為一體(統稱泵體),軸封為機械密封(如:圖1)。中等流量以上的泵襯套為一單獨的零件固定

                               1

于泵體內,大流量泵多制成雙吸結構臥式安裝,軸封根據輸送介質的不同有機械密封和填料密封兩種(如:圖2)。

Simple in constitutionThe pump has quite a few construction forms. General for small flow range 0.2-6 5 m³/h,pump 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、泵體 pump casing            2、襯套 liner

3、螺桿 screw spindle           4、下蓋 lower cover

5、上蓋 upper cover            6、密封蓋  cover of seal

7、安全閥 felief valves

               2drawing 2

  船用泵的安裝形式有臥式和立式兩種,原動機為交、直流船用電動機。

For marine application pumps,installation forms could be horizontal and vertical,with marine AC and DC drivers.

2.2壽命長:三螺桿泵的主動螺桿由電動機驅動,生、從桿之間沒有機械接觸,而由所輸壓力液體驅使從桿繞軸心線自轉,主、從桿之間、螺桿與襯套之間皆有一層油膜保護,因而泵的機械摩擦極小,壽命堪稱半永久性。

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

2.3所輸送的液體在泵內作軸向勻速直線運動,故壓力脈動小,流量穩定,噪音低,由于轉動部件慣性小,則起動力矩和振動很小。

The medium to be pumps is in a manner of constant axial flow movement,so the pressure pulsation is almost eliminated,meanwhile the noise is lowered;and as the moving parts have a very little inertia,the 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為保證泵,電機及管路系統的安全,中等流量以上的螺桿泵均帶有安全閥,當壓力超過安全閥的設定壓力后,高壓油將回流到泵的進油口。

In order to ensure the safe working of pump,motor,piping system,pumps for a capacity higher thean middle flow range are all equipped with safety values. When working pressure is exceeding the setting pressure of values,pressured oil will circulate back to suction chamber.

3、材料組合 Materical

材料組合代碼

Material code

泵體

Casing

襯套

Insert

適用范圍

Using range

W1

 

HT200

Cast iron

稀土銅鉬球鐵

Special modular

Cast iron

可低壓輸送潤滑性較差,黏度適當的液體,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

可低壓輸送潤滑性好,黏度適當的液體,如潤滑油等

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

用于特殊場合(如船用泵)低壓輸送潤滑性較好,黏度適當的液體,如潤滑油等Used in particular case such as marine pump,to pump the mediumsuch as lubricant oilwith better lubricant and suitable viscosity at lower pressure

W4

QT450-10

Nodular cast iron

稀土銅鉬球鐵

Special modular

Cast iron

用于特殊場合(如船用泵)低壓輸送潤滑性較差,黏度適當的液體,如燃油等Used in particular case such as marine pump,to pump the medium with less lubricant and suitable viscosity at fuel oil at lower pressure

W21

HT200

Cast iron

ZCuSn5Pb5Zn5

Special bronze

可在較高壓力下輸送潤滑性較差,粘度較低的液體,如重油、燃油等。Used to pump the medium with less lubricity and lower viscosity,such as heavy oil and fuel oil

W23

Qt450-10

Nodular cast iron

ZCuSn5Pb5Zn5

Special bronze

用于特殊場合(如船用泵)有較高壓力下輸送潤滑性較差,粘度較低的液體,如重油、燃油等。Used in particular case,such as marine pump,to pump the medium with less lubricity and lower viscosity,such as heavy oil and fuel oil,at higher pressure

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4、系列說明 System code

系列特征

Serise

系列代碼

Figure

結構型式

Construction form

適用范圍

Main application

性能范圍 Specifications

流量Capac

最高工作壓力Max. pre

滑油系列

For Lub. oil

3G

3GC

臥式   單吸

Single suction horizontal installation

20~150cst潤滑油類及潤滑性液體

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

0.0-94

m³/h

60

bar

3G

3GCS

臥式   雙吸

Double suction horizontal installation

80-590

16

3GCG

立(懸掛)式 單吸

Single suction hanging installation

80-590

8

3GCL

立式柱腳型  單吸

Single suction Vertical pedestal

4-96

8

3GCLS

立式柱腳型  雙吸

Double suction Vertical pedestal

88-306

8

燃油系列

For fuel. oil

3Gr

3GCSr

 

臥式   單吸

Single suction horizontal installation

3~365cst輕重質燃油類

Light oil heavy oil

Visc.3~365cst

0.3-94

601

252

3GSr

3GCSr

 

臥式   雙吸

Double suction horizontal installation

80-590

16

高粘油系列

For high visc. fuel oil

3GN

臥式   單吸

Single suction horizontal installation

365760cst高粘油類

High Visc. Fuel oil Visc365~760cst

1.0-40

25

注解:(1)適用于重質燃油類  for Heavy oil

     2)適用于輕質燃油類  for Light oil

5、3G螺桿泵輸送各種油類時應注意事項

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

5.1輸入40-150m/s的油類最合適,允許按泵的最高工作壓力使用。

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

Of the maximum working pressure of pump is permissible.

5.2輸送40m/s以下的油類,為保證泵的流量及壽命應降壓使用。

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

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ensure the flow and life of the pump.

5.3輸送150m/s以上的油類,且進油管道過長,彎頭過多,泵工作時如產生噪音或振動現象,則應考慮更換低一級的轉速的電機運轉或縮短吸入管道,減少彎頭。

When conveying oil with viscosity 40 m/s,and the oil inlet pipe is too long,with too many bends,if 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三螺桿泵軸伸支承較小,應由原動機經彈性聯軸器直聯驅動,不得用皮帶輪等會產生額外徑向力較大的傳動方式傳動。

The support for shaft extension of three Screw Pump is comparatively small,it 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.

6、3G螺桿泵安裝要求Installation requi rements of therr screw pump type 3G

  6.1安裝前應檢查螺桿泵 的油封是否良好,并檢查泵在運輸中是否損壞,可用手轉動聯軸器是否有卡勁現象,如有則應拆泵進行清洗,修理和校正。

Bethre installation,the oil seal of the pump should be checked. To see if it is in order,and inspect whether the pump is damaged in transit. Turn the coupling with hand to see if it is blocked;if so,the pump should be dismantled for cleaning,repair and adjustments.

6.2安裝螺桿泵 的進油和排油管道時,其管徑不得小于泵的進油和排油口口徑,進油管道不得過長,彎頭不得過多,否則將影響泵的工作狀態。

When installing oil inlet and oil discharge Piping,the 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 long,should not have too many bends;otherwise the function of the pump will be affected.

6.3當有兩臺以上的螺桿泵 安裝在同一條主管線上,為便于泵的啟動,在近泵的排油管上必須安裝逆止閥。

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對于在較高溫度(60以上)下輸送粘度大的油類(如:重油)的備用泵,必須是熱備用泵,否則泵在低溫下啟動會電機過載或泵損壞,(建議在靠進泵的排油管上的逆止閥旁,并聯安裝一個小回流閥,對備用閥可微啟回流閥,使螺桿泵 緩慢逆轉,其你轉速≤100/分,使部分熱油經常流過泵內,達到泵熱備用目的)。

When conveying oil of comparative high viscositysuch as;heavy oilunder higher temperatureabove 60℃)by a spare pumps,the 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.m,thus allowing part of the hot oil frequently flow

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though the pump ready for use.

6.5輸送介質內含有機械雜質,將嚴重影響螺桿泵 的運轉和降低使用壽命,因此在泵安裝前,必須仔細清除進油管內的焊渣,沙粒等雜質,并應在進油管道靠近泵處安裝濾器,濾器網孔大小,可根據工作情況及雜質粘度確定,(一半可用40-80目網),過濾面積一半不得小于進油管橫截面積的20倍。

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

to the pump the mesh of the filtering screen may,be 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盡量在螺桿泵 進油和排油口處的螺紋孔上連接壓力表和真空表。以便于觀察泵的運轉狀態。

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原動機與螺桿泵 的轉軸必須在同一中心線上,可用直尺測隙規在聯軸器圓周上間隔90°處檢查。

The rotation shafts of motor and the pump must be on the same center line. Pump must be on the same center line,this 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原動機與螺桿泵 的轉向必須一致,嚴格禁止原動機驅動泵逆轉,電機接線時,應先脫開電機與泵的聯軸器,對電機作試運轉,使其轉向與泵的轉向標志一致。

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 disconnected,cenduct trial run of the motor,to make its rotation direction same with the pump.

7、3G三螺桿泵的使用和維護Application and malitenance of three screw pump type 3G

7.1螺桿泵啟用前,必須全開進油和排油閘閥。

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

7.2首次啟動螺桿泵或再次使用長期封腔灌注適量輸送介質,避免泵干啟動。

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

7.3螺桿泵啟動后,應密切注意電流表,壓力表和真空表的數值,超出規定值時,應停泵找出原因后,再行啟動。

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

7.4軸封處點滴泄露,應屬于正?,F象。當泄漏量大量增加時,對軟填料密封應壓緊填料壓蓋,對機械密封應停泵修復后,再行啟動。

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

7.5用高溫蒸汽清掃管線時,應避免高溫蒸汽通過泵內。

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

7.6如果螺桿泵長期不工作時,應進行油封,并定期檢查油封情況,必要時重新油封。

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

8、3G型三螺桿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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