Hydraulic test and pressure test

AC Electric motor Plastic fan parts 
Specifications
1. Customised 
2. good quality 
3. 20 years manufacturing experience 

4. Delivery Detail: 20-35 days after receiving payment 
1. When the test container, the top should be a vent should be in the air in the container when charging. During the trial, the outer surface of the container should be kept dry. 2. When the pressure vessel wall temperature and the temperature single phase motor is roughly same, liquid pressure. 3. The test pressure shall be slowly rising, reach the specified test pressure, pressure maintaining time is generally not less than 30 min, then the pressure drop to 80% in the specified test pressure and and stay long enough to examine all of the welded joint and connection parts. If there is any leakage, repair and test again. 4. Pressure should be ac electric motor kept constant during inspection, shall not adopt continuous pressure to keep the pressure constant. In the process of the hydraulic pressure test shall not take the bolt or external forces are added to the pressure parts. 5. For spherical storage tanks, hydraulic test method meets the requirements of GB 12337-1998 the 8.10.4.4. Pressure test. 1. The pressure test should have security measures, the safety measures should be approved by the head test unit technology.

 Totally Enclosed Protect Feature and Three-phase Phase low rpm ac electric motor
Specifications
Specifications1.3-phase asynchronous motors 
2.IEC standard 
3.OEM 
4.Voltage:50HZ &60HZ;380V&415V 
5.Protection class: IP54 
The safety of the pressure test, the test unit department deal with on-site supervision of the implementation of the security measures. 2. The test pressure shall be www.facebook.com/guohong.trading slowly rising, to 10% in the specified test pressure and no more than 0.05 MPa, the holding 5 min, for all the welding joint and connection parts with soap or other liquid leak detection for the first time the leak check, if there are any leaks, repair and test again. Initial leakage inspection qualified, and then slowly rose to a test pressure of 50%, if there is no abnormal phenomenon, followed by per level for 10% of the specified test pressure booster, step by step until the specified test pressure. The holding after 30 min, the pressure drop to 87% in the specified test pressure and maintain long enough, again to leak check all of the welded joint and connection parts. If there is any leakage, repair according to the above provisions after the test. 3. Pressure should be kept constant during inspection, shall not adopt continuous pressure to maintain test pressure constant. The bolt is strictly prohibited in the process of pressure test with pressure and the external force are added to the pressure parts. 4. For spherical storage tanks, pressure test method should also conform to the requirements of 8.10.5.5 in GB 12337-12337.

Switching network

AC fan cooling motor fan cover 

Specifications
1. Customised 
2. good quality 
3. Surface treatment: Galvanize 

4. Type: Motor Cover 
 Repeaters to go in and out In and out of Repeaters is the interface circuit between the trunk and switching network, is used to switch trunk connections. Its features and circuit and switching system used in the system and trunk signal way has a close relationship between innings. To simulate relay interface unit (ATU), its role is to realize the simulation of the trunk and exchange network interface, basic functions in general are: sending and receiving said trunk status (such as idle, occupy, reply, release, etc.) of the line signal. Forward to receive on behalf of the called number of register signal. Supply the power supply and signal. Provide the received signal to control equipment. For the simplest case, a switch relay through solid line trunk with another switch connection, and USES the subscriber loop signal, then the simulation of the repeater function and equivalent to a "phone". If other more complex signal method, the repeater should implement the corresponding voice, signal transmission and control function.

 CCC,CE Certification and Waterproof Protect Feature ac motor
Specifications
power range: 0.12-18.5 kW 
Centre height of frame: 63-160 mm 
Rated Voltage: 220V 
Rated Frequency: 50Hz or 60Hz
Digital trunk interface unit (DTU) role is to realize the digital trunk and the interface between the digital switching network, it was related by PCM timeslot transmission trunk signaling, complete is similar to the basic function of the simulation should bear repeater. But as a result of the digital trunk transmission way of PCM digital signal, therefore it has some special issues of digital communication, such as frame synchronization, the clock recovery, type exchange, signaling insertion and extraction and so on, which to solve the signal transmission, synchronization and signaling with three aspects of the connection 3 phase induction motor problem. The basic function of digital acmotor2.blogspot.com ac motor relay interface unit including the frame and the complex frame synchronization code generation, frame, even zero suppression, type transformation, alarm processing, clock recovery, frame synchronization search and inter-office signaling insertion and extraction etc., like permanent magnet motor BORSCHT simulated user circuit, also the above eight kinds of function of digital relay unit can be summarized as GAZPACHO.

Bipolar stepper motor

 Bipolar stepper motor are so named mini electric motor because each winding can both directions electricity.So each winding can be N pole and can be the S pole.Stepping motor,it is also known as single winding because each only a single winding,it also referred to as two phase stepper motor,because has two separate coils.Bipolar stepper motor has four generator stator root lead,two each winding.With the same size and weight compared to the single step electrode polarity,bipolar stepper motor has a greater ability to drive,the reason is that the magnetic poles (not ask tap in a single coil) in electric motors 12 volt the field strength is twice the unipolar stepper motor.Bipolar stepper motor of each winding need a reversible power,usually provided by H bridge driving circuit.Because of the bipolar stepper motor than single polarity of stepper motor output torque,so is always used in the design of the space is limited.It is also a floppy disk drive head step into the mechanical system of driver is always adopt the cause of the bipolar stepper wholesalemotor.blogspot.com motor.To use digital multimeter can be quite simple to find two windings.If one could measure the resistance between two lead,then between the two leads are belong to a winding,the other two lines of q is another winding.Bipolar stepper motor of the interval is usually 1.8.Step,that is,200 a week.

Ammeter pointer during no-load or load running back and forth

1),2) squirrel cage rotor broken bar,a phase winding rotor circuit (3),a phase of wound rotor type motor brush contact bad 4),wound rotor type motor Poor contact slip ring wholesalemotor.blogspot.com short circuit devices 9.The cause of motor vibration 1),2) unbalanced rotor,shaft bending head 3) 4),imbalance of pulley,pulley eccentric shaft hole 5),fixed the loose bolts 6) of the motor,fixed The acmotortrading.blogspot.com foundation of the motor not firm or uneven 10.The cause of the motor bearing perkins diesel generator set overheating 1),2) bearing damage,lubricating oil too much,too little,or oily bad with 3),bearing and perkins diesel generator set shaft too loose walk in circle or too close with 4),bearing and end cover too loose walk outside Or too close.5),sliding bearing ring rolling or slow rotation 6),on both sides of motor end cover or bearing cover is not flat 7),belt tight 8),coupling packed Not good.

Fault phenomenon:motor vibration is too large

Reason and solutions:1.The electric motor cooling fanrotor imbalance www.dongfeng-motor.com-leveling balance 2.Belt wheel unbalance or axis stretch bending-check and correction 3.Motor is not aligned to the load axis-check to adjust the axis of the unit motor fan4.Wrong-check the motor installation and foot screws 5.The heavy load suddenly, lighten the load

Motor capacity of transformation

The necessity of transformation and significance When bearing drainage area appeared for excess water, drainage pumping station often appear the following deficiencies: 1. To normal operation of super water pump head. 2. Because of water level super hump, unable to stop and have to stop. 3. The pump can satisfy the requirement of head, but as a result of rising lift shaft power rise, make the form a complete set of motor overload and had to stop. 4. The unit can continue to run, but restricted by motor capacity, water pump was forced to can only be run at the small blade Angle and the flow condition, make water pump water ability can not get sufficient play. For more than 3, 4 two situations, such as able to motor capacity of technical innovation, it can increase the pumping station recovery and drainage ability, so as to speed up the drainage, drainage time, to avoid and reduce the purpose of flood losses. (2) the capacity of transformation method For different kinds of capacity, and the status of the use of motor capacity of technical innovation for different methods should be administered. 1. Large pump motor Large pumping station are generally not synchronous motor, the motor can be realized by changing the way of the motor winding the compatibilizing. Since the eighty s, insulation level had the very big, for its more than 6 kw motor stator insulation not only in terms of overall performance has improved a lot, and the thickness is thinned 20% ~ 30%, which makes electric JiShu slot with more space. 

So in transformation of motor in line, can use the electric JiShu groove put more conductive body, increase the rated capacity of the motor. Practice shows that the modification is can make the motor rated capacity increases by 5% ~ 20%. At the same time, because after transforming the insulation level and allows all have a certain degree of temperature increase, thus can also be correspondingly enhance the overload capacity of the motor. 2. The small and medium-sized pump motor Small and medium sized pumping station used for asynchronous motor, and model is mainly for the J series, JS series and Y series, etc. The J series motor, because of the high energy consumption, backward technology, countries have explicitly give fall into disuse, so for this series motor is unfavorable in line simple transformation, should be thoroughly replacement for the new type of motor. But should fully consider when replacement pump station operation requirements, increasing the capacity of the new motor. For Y and JS series motor, due to its trough filled with rate don't have much allowance, so can't adopt the way of changing winding increases put electrical conductor to increase. But the aging of the use of time is not long, not serious the series motor can be connected by star - triangle series hybrid winding method is expanded. That the original 60 ° phase with three phase winding is divided into two sets of three-phase windings, one USES the y connection, another set of the delta connection. On the spatial phase differences between two sets of winding Angle of 30 ° electricity. Winding star connection part of the phase lag the triangle with center part of the electrical Angle of 30 ° with center. Practice shows that the modified method can diesel generating set improve the motor performance, improve the winding coefficient, make the motor rated 8500w gasoline generator capacity increased by 5% ~ 10%.