日机装屏蔽泵_屏蔽泵生产厂家_上海屏蔽泵厂家_上海屏蔽泵_专业生产屏蔽泵厂家_专业屏蔽泵厂家-上海日机装屏蔽泵有限公司

1、自动推力平衡

固定节流环和可变节流环的流体力学作用提供的自动推力平衡使轴在推力轴承的中间位置，这样就消除了在正常运行中推力轴承的磨损。推力垫圈和石墨轴承推力面之间的异常磨损，仅在起动和进口吸入不良的意外情况下发生。

1、Automatic Thrust Balance

The hydrodynamic actionof set 0ffixed and variable orifices provides automatic thrust balancing to center the shaft between thrust bearings．This eliminates thrust bearing wear during normal operation．It will occur to contact between the replaceable thrust washers and the thrust face 0f the carbon bearings on the condition 0f startup and severe conditions such as loss 0f suction．

2、轴承监视器

●　机械式轴承监视器

机械式轴承监视器是由检测部分探头和压力指示表组成的。检测部分的探头安装在轴端的端螺母内同时固定在后轴承座上。检测探头内封有加压的氩气。当轴承径向磨损或者轴向磨损时，轴会发生振动。引起转子超出正常范围，导致检测部分和端螺母接触并且磨损，引起监视器内压力下降（或上升）压力指示器表示异常。另外，由于机械式轴承监视器检测部分采用了和泵相同的材质，所以还能起到监视泵内材料的腐蚀情况。在表本体和探头之间由于注有氟油，所以整个结构保证耐压的要求。

2、Bearing Monitor

●　Mechanical Bearing Monitor

Mechanical bearing monitor is composed of probe and pressure gage．It is mounted on the rear bearing housing and it is probe flied with argon gas is inserted into the end nut of the rotating shaft. When bearing wear exoeeds the predetermined limit,the probe contacts the inner wall of the end nut and breaks．When the probeis broken,the pressure 0f the argon gas is released,thus reducing the pressure．Therefore,any drop in pressure results in indication of the abnormal state．Besides,the probe is made of the same material as that 0f starer liner, the monitor can also detect corrosion of the stator liner and rotor sleeve．Insert fluorine oil is filled between theprobe and pressure gauge,and the entire structure is designed to withstand pressure

●　电气式轴承监视器

当轴承磨损时，转子发生偏移，使空气间隙尺寸失去平衡，这是转子的缝隙导致磁波（一种高频率波）振幅发生变化。为了检测这种变化，在定子绕组中以120度间隔埋入三组检测线圈，并且将线圈串联连接。这样就能将合成电压显 示出来，检测出轴承的磨损量。日机装的电气式轴承监视器采用了三组检索线圈所以能提供可靠地轴承监视手段。

●　Electric Bearing Monitor

When there is wear on bearing．the rotor will shift so that the air gas size is not in balance,then the amplitude of magnetic induction gap magnetic of rotor(a high-frequency wave)changes,In order to dctoct the sense,three windings connected in series are buried in the statorlocared of l20 degrees in the interval．So the syntbesisvoltage will be displayed and the bearing wear will be tested．Due to the use of three search coils,it is reliable to monitor bearing wear.

●　电子式轴承监视器（已申请专利）

是日本日机装见年开发的新产品，工作原理是：定子线圈的前后端按90度相间各埋四组线圈，当正常运行时，转子处于正常位置（定子的中央的位置，即前后左右上下距离相等），此时感应电动势矢量之和为零，如轴承径向磨损，转子和定子的间隙（左右上下）将发生偏差，检测径向线圈的感应电动势之和为零，产生微小的电压。又如轴承轴向上出现磨损时转子将在定子内向前或向后移动，此时轴向感应电动势矢量之和不为零时，产生微小的电压。感应电动势不为零时，仪表面板上的发光二级管就会显示其磨损状况。

电子式轴承监视器安装了标准的外部输出端口，通过3芯的电缆连接到终端。电子式轴承监视器可以方便连接到中控室，远程监视多台泵的运行状况，从而避免了现场巡检节约了人力，同时电子式轴承监视器具有远程报警，在异常情况下，切断泵的运行。

●　Electronic Bearing Monitor(E-monitor) Patent Pending

[Rdiable bearing monitoring system for deteedng Bearing Wear] The E Monitor has a stator with a built-in search coil．By using the starting voltage generated in the search coil,the E Monitor electrically detects positional changes of the rotor(inthe radial/axial directions)caused by worm bearings．The LED lamp indicates any change．Tbe E Monitor has four search coils Oil each side of the stator(for atotalofeight coils)．Two search coils on both the front and the rear are used to detect wearin the axial and radial directions．

The E Monitoris equippedwith a standard external output terminal．By connecting a 3-core cable to the terminal,the E Monitor can be connected to the pump central control room．A remote surveillance E Monitor monitors multiple pumps and eliminates the need for site patrol,thus saving manpower．The remote surveillance E Monitor is equipped with contaots(with an alarm level setting function)for alarm output and for stopping the pump．

3、选购件

●　空运转保护装置

空运装保护装置是为了避免空运转和气蚀运转的。当系统被抽空，断液或发生气蚀等时，此装置会发出驱动保护泵装置的信号。

●　Dry Operation Prevention Device

When a caromed pump shall be operated continuously in a dry condition,the pump may result in a damage due to excess wears of the bearings, excess temperature rise,etc.To prevent such phenomenon(severe suction inadequate and cavitation),current sensing type(SAO Relay)of Dry Operation Preventive Device Call be furnished.

●　转向检测仪

通常要检测屏蔽泵电机的旋转方向是很困难的。日机装的转向检测仪是一种能从外部检测出屏蔽泵电机磁场，并用LED指示灯来表示电机正逆旋转方向的测定仪器

It is hard to judge the rotation direction especial in the canned motor pump normally．NKK’S rotation detetor is sensed by the motor magnetic field from the outside of the motor,meanwhile,shown by the LED signal to monitor the right direction．

●　轴承监视器

不仅能够监测轴承径向、轴向的磨损，而且可以监测材料的腐蚀。

●　Bearing monitor

It can not only monitor the bearing wearing of axial side and radial side,but detect the corrosion of material.

●　补液罐

不仅能够监测轴承径向、轴向的磨损，而且可以监测材料的腐蚀。

●　Seal pot

Seal pot is available for type HM in order to supply flushing liqshing to mechanical seal.