Henan Yin Yanrong universal shielding pump has the characteristics of reliable sealing, the use of good effect, it is an important mechanical gas transmission equipment (see the attached photo). Shielded pump is now introduced the appearance and treatment methods. Shield pump status 1. Needle indicator gradually increased: the pointer does not swing or indicate abnormal; 2. Needle swing no rules; pump flow, pressure instability; the internal sound is not normal or the motor heat locally 3. Needle suddenly rose to the red zone; watch swing amplitude increases, and there are regular fluctuations (sometimes stop after the start of the fault disappears); Needle indicator value is greater than 0.75; the operation is not smooth. Flow pressure is low; 5. Needle indicating normal: or normal operation, table needle greater than 0.75; 6. A phase current is zero, indicating the needle value of 0.5: 7. The indicator shows suddenly big or small, or swing, and this phenomenon is temporary; Electric pump is operating normally, the power is connected to pick up the needle. Instruction is always greater than 0.75 sometimes stalling for a period, then start the fault disappears; Needle without indication or indication of the reverse: 10. Main circuit terminals to ground insulation is zero, or start the pump trip; Possible cause of the malfunction 1. Power supply voltage or bearing wear increases: 2. Circulatory system is not normal, lack of flow or bubble: 3. Rotor cage expansion caused by local short: 4. Reverse power phase sequence; 5. Module phase power and motor terminals of the phase sequence is inconsistent; TRC table and hot components connected the wrong line; 6. Lack of phase: 7. Pipeline mixed with foreign matter or working fluid crystallization or precipitation; 8. Module or TRC table damage or TFRC system flow loop grounding; Overhaul module polarity reversed. Instrument damage; module selection error; 10. Damage to the connection frame; Damage to the main winding; Incorrect wiring of the TRC meter and the thermal element; Approach 1. First check the voltage is normal, and then check the bearing wear, such as exceeding the required value, replace the graphite bearings; 2. Check the circulating fluid pipeline: check whether the pump type meets the technical requirements; 3. For the same type of rotor; 4. Check the power phase sequence and reconnect the power supply: 5. Check whether the phase sequence of the three-phase power module corresponds, according to the correct phase sequence; 6. Check the power cord; 7. Check the working fluid and circulation lines to exclude foreign matter; 8. Check the module input and output electrical parameters, check the module, TRC table is grounded; 9. Check the type of module used and the polarity of the meter is correct: 10. Remove the module and the main windings from the terminal block and inspect them separately.