Fuel pump test bed power speed control system status quo what? The current situation of the power speed control system of the fuel injection pump test bed is as follows: (1) Mechanical Rotating Variable Speed ​​Fuel Injection Pump Test Bench The mechanical rotating speed test bench utilizes the variable-diameter pulley to realize the continuously variable speed of the fuel pump drive and drive the shaft speed. This type of test bed began to be produced domestically in the late 1950s. Due to its simple structure and easy production, it has occupied a large market in the fuel pump maintenance industry. However, this type of product has low transmission efficiency and narrow variable speed range and is difficult to meet the requirements of high speed, High-power diesel engine supporting the injection pump debugging, at present only a small amount of the type test bed, mainly for tractors, construction machinery and other small and medium-power diesel injection pump debugging, such products are already out of products. (2) Hydraulic injection pump test bench Hydraulic transmission test bed, the transmission efficiency and speed stability, generally better able to meet the various types of fuel pump debugging requirements. Since the sixties in the domestic production, is a mechanical test bed replacement products. At present, the fuel pump repair industry has a larger market. Because the product is driven by a hydraulic pump to drive the hydraulic motor shaft speed, the hydraulic components require high precision machining, the structure is relatively complex, making the manufacturing more difficult, the use of maintenance is more difficult, the operation is not very convenient, Big voice Therefore, the test bed of the species currently in the pump oil Tsui manufacturers have been basically eliminated. (3) Slip-type pump test bed Slip-type test bed is the end of the seventies began mass production of products in the pump Tsui manufacturers and maintenance industries have greater ownership. Basis slip clutch is generally designed and manufactured by the test bed manufacturer, and with the common three-phase asynchronous motor supporting, there are some manufacturers are directly using the motor manufacturer of slip speed motor mounted on the test bed. The main features of this type of test rig is simple structure, easy maintenance, easy to operate, high reliability, its performance can meet the pump oil Tsui production debugging and maintenance needs of the industry. But there are also instability of the speed control circuit performance, easy to cause speed control loss and other defects, the failure of equipment maintenance and operating personnel have a certain degree of danger, therefore, individual manufacturers of products in the monitor part of the installation speed Set the protection function, thus effectively ensuring the safety of equipment operation. (4) Inverter-type fuel pump test bed AC frequency control is the rapid development in the eighties to the mechanical and electrical speed control technology. It is the application of microprocessor technology and high-power electronic components of the motor variable speed control system, the output drive shaft generally by the motor drive shaft directly output, smooth operation, and its torque characteristics for the injection pump debugging provides accurate speed, operation More convenient, more functional. Therefore, domestic injection pump test bench production enterprises or through the introduction of patented production technology products, or to develop their own design, and soon developed a variety of specifications of the fuel injection pump test bench, the localization of fuel pump test bench technically more Great improvement. In order to improve the function, the fuel injection pump test bench is also generally increased to increase the power supply, air supply, flowmeter and other additional features.
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