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Pumping unit process flow
The pumping unit is a type of mechanical equipment used for oil extraction. The kowtow machine, also known as the beam pumping unit, is a traditional pumping equipment widely used in oil fields, usually driven directly by an ordinary AC asynchronous motor. The crank belt uses a counterweight balance block to drive the pumping rod, driving the underground oil pump to perform a fixed cycle of up and down reciprocating motion, and sending the underground oil to the surface.
As an oil pumping equipment, its movement is to repeatedly lift up and down, with one stroke being lifted once. Its power comes from two steel sliding blocks of considerable weight driven by an electric motor. When the sliding blocks are lifted, they act like a lever to send the pumping rod into the well. When the sliding block descends, the pumping rod is lifted to carry oil to the wellhead.
During the sliding block descending process, due to the load reduction, the energy generated by the motor dragging has no place to be released, which is bound to enter the regenerative power generation state, causing the bus voltage of the main circuit to rise. Frequent high-voltage shocks will damage the main components of the inverter, including the electrolytic capacitor and power module. Therefore, the braking circuit is added, so that the regenerative voltage can be released in time, to ensure that the equipment works at a safe voltage.

Difficulties in Transforming the Frequency Converter of Traditional Knocking Machines
1. The kowtow machine has two power generation states in one working cycle. Especially when the counterweight is unbalanced, the "pump up voltage" generated is very high. The problem cannot be completely solved by increasing the electrolytic capacitor at the DC side of the converter and reducing the brake resistance value. And the "pump up voltage" is also changing with the change of the oil layer.
2. The starting of the kowtow machine requires a large starting torque. If the parameters of the frequency converter are not set properly, it can easily cause overcurrent or failure to start.
3. Previous frequency conversion energy-saving transformation design schemes rarely considered changes in oil level and concentration of oil wells. In terms of increasing production, the effect is not satisfactory.

Winch, also called winch, is a device that drives the drum and winding rope to complete the traction work by manpower or mechanical power. A simple lifting machine that vertically lifts, horizontally or obliquely pulls heavy objects.

Central air conditioning is a major consumer of electricity in buildings. In the annual electricity bill, the power consumption of air conditioning can reach about 60% of the entire building's electricity consumption. The central air conditioning system in the building is designed and installed according to the maximum load and with a certain margin. However, in a year, it can only operate at full load for more than a month, or even more than ten hours, and the majority of the time the load operates below 70%. Usually, the load of the refrigeration unit in the central air conditioning system can automatically adjust the load according to seasonal temperature changes, while the refrigeration pump and cooling pump matched with the refrigeration unit cannot automatically adjust the load. They operate at 100% load for almost a long time, causing great energy waste and deteriorating the operating environment and quality of the central air conditioning.

Music Fountain System
Mainly composed of music players, preamplifiers, power amplifiers, monitoring speakers, and sound columns, most systems use multimedia upper computer programs to play music

The equipment consists of a loop, a release reel, and seven wire drawing reels. According to the spe...