6. Pay attention to the cleaning and lubrication of bearings and windings
Proper lubrication of the bearings and cleanliness of the windings are properly installed and well maintained, which saves the motor in operation.
Excessive or inferior grease will increase frictional losses and reduce efficiency; it will cause oil to slam on the windings and damage the windings. Therefore, the grease should be properly filled during maintenance and high-quality lithium-based grease should be used. At the same time, it is necessary to prevent moisture and harmful gases from entering the inside of the motor and keeping the winding temperature above zero.
7. Using reactive power automatic compensation
The load of the pump motor is inductive and its current vector lags behind the voltage vector. This type of load consumes active power and also consumes reactive power, while consuming reactive power is greater than active power. The method of increasing cosφ is to parallel the capacitor with opposite inductive reactance at both ends of the load, and to compensate the inductive reactive power (positive) with capacitive reactive power (negative). In fact, the reactive power fluctuations in the inductor and capacitor are exactly 180° out of each other. That is, when the inductor absorbs energy, the capacitor releases energy, and when the capacitor absorbs energy (charging process), the coil releases energy. Because shunt capacitors have this feature, they are widely used in power transmission, conversion, distribution and other electrical equipment to increase the force rate.
Compensation method: In the reactive power automatic compensation application, the empirical formula is obtained: the reactive current of the capacitor is 56% of the motor load running current.
8. Adopt S10 energy-saving transformer
The increase of the motor power rate is directly related to the reasonable selection of the capacity type of the power transformer, and the factors such as reactive power compensation. Therefore, from the perspective of power saving. It is important to replace the SL and SL1 series energy-consuming transformers with the S7, SL7, SZ7, SLZ7 series 10~35kV transformers as soon as possible, using 45° full slant joints, no punching, fiberglass band lashing, iron core selection quality Grain oriented cold-rolled silicon steel sheet. The winding wire is made of acetal enameled wire. As well as new materials, new structures and new processes such as sheet radiators, it has the advantages of low loss, small size, light weight, energy saving, and saving operating electricity costs compared with the same grade old transformers.
9. Pump selection, commissioning and maintenance
Driving the pump with a motor is a holistic system. The efficiency of the working machine will directly affect the power consumption of the motor. The operating efficiency of the pump is related to its size, flow rate, flow rate, speed and other data. It should be reasonably selected to determine the working conditions that meet the production requirements and achieve the best efficiency.
Regularly adjust the balance of the impeller and improve its smoothness, adjust the axial clearance and replace the ring, improve the inlet and outlet pipes, reduce the number of elbows, and remove the excess impeller. Regularly clean the oil, otherwise the frictional resistance will increase, resulting in increased power consumption.
10. Improve the organization measures for saving electricity
There are a lot of aspects involved in saving electricity, and there are ideological problems and methodological problems. Technical issues require cooperation from all sides. Therefore, we must attach great importance to management, including the formulation of power consumption quotas, reward and punishment conditions, and regular maintenance and testing of electrical equipment. Renovate equipment that consumes a lot of electricity, promote the use of new energy-saving products, and establish a sound energy equipment file management system. To this end, it is necessary to establish and strengthen energy-saving management institutions, especially the energy sectors of small urban and rural enterprises. We should conscientiously carry out rectification and strengthening, and be responsible.
