R902452707 A A10VSO45DFR1/32R-VPB12N00-S2655 Rexroth RE

R902452707 A A10VSO45DFR1/32R-VPB12N00-S2655 ReXROTH plunger pump from RexrothR902452707 A A10VSO45DFR1/32R-VPB12N00-S2655 ReXROTH plunger pump from RexrothR902452707 A A10VSO45DFR1/32R-VPB12N00-S2655 ReXROTH plunger pump from RexrothR902452707 A A10VSO45DFR1/32R-VPB12N00-S2655 ReXROTH plunger pump from RexrothR902452707 A A10VSO45DFR1/32R-VPB12N00-S2655 ReXROTH plunger pump from RexrothR902452707 A A10VSO45DFR1/32R-VPB12N00-S2655 ReXROTH plunger pump from Rexroth The REXROTH plunger pump and plunger sleeve are a pair of precision parts that cannot be interchanged after pairing and grinding. They require high precision, smoothness, and good wear resistance. The radial clearance is 0.002-0.003mm. The REXROTH plunger pump has a slanted groove cut on the cylindrical surface and is connected to the top through radial and axial holes to change the circulating oil supply; The plunger sleeve is equipped with inlet and return oil holes, both of which are connected to the low-pressure oil chamber in the pump upper body. After the plunger sleeve is inserted into the pump upper body, it should be positioned with positioning screws. The position of the inclined groove in the REXROTH plunger pump varies, and the method of changing the fuel supply is also different. The oil outlet valve and the oil outlet valve seat are also a pair of precision fittings, which cannot be interchanged after pairing and grinding, with a fitting clearance of 0.01mm. The oil outlet valve is a one-way valve. Under the action of spring pressure, the conical surface of the upper part of the valve fits tightly with the valve seat. Its function is to isolate the high-pressure oil pipe from the upper cavity of the plunger when the supply is stopped, preventing the oil in the high-pressure oil pipe from flowing back into the fuel injection pump. The lower part of the oil outlet valve has a cross section, which can guide and pass diesel. There is a small cylindrical surface under the conical surface of the oil outlet valve, called a pressure reducing ring. Its function is to quickly reduce the oil pressure in the high-pressure oil pipe at the end of the oil supply, avoiding oil dripping at the nozzle. When the annular ring falls into the valve seat, the volume above quickly increases, the pressure rapidly decreases, and the spraying stops quickly. During operation, the cam on the camshaft of the fuel injection pump and the plunger spring force the plunger to reciprocate up and down, thereby completing the pumping task. The pumping process can be divided into the following three stages. During the oil inlet process, when the convex part of the cam rotates, the plunger moves downward under the action of the spring force, and the upper space of the plunger (called the pump oil chamber) generates a vacuum degree. When the upper end face of the plunger opens the oil inlet hole on the plunger sleeve, diesel filled in the oil passage of the upper body of the oil pump enters the pump oil chamber through the oil hole, and the plunger moves to the bottom dead center, ending the oil inlet. During the fuel supply process, when the camshaft rotates to the convex part of the cam and lifts the roller body, the plunger spring is compressed, the plunger moves upward, and the fuel is compressed. Part of the fuel flows back to the upper body oil chamber of the fuel injection pump through the oil hole. When the pillar
When the top surface of the plunger covers the upper edge of the oil inlet hole on the sleeve, the small clearance between the plunger and the sleeve (0.0015-0.0025mm) makes the pump oil chamber at the top of the plunger a sealed oil chamber. As the plunger continues to rise, the oil pressure in the pump oil chamber rapidly increases. When the pump oil pressure is greater than the spring force of the outlet valve and the remaining pressure of the high-pressure oil pipe, the outlet valve is pushed open, and high-pressure diesel enters the high-pressure oil pipe through the outlet valve and is injected into the combustion chamber through the injector. The REXROTH plunger pump supplies oil. When the inclined groove (stop supply edge) on the plunger is connected to the return hole on the sleeve, the low-pressure oil circuit in the pump chamber communicates with the middle hole, radial hole, and inclined groove on the plunger head. The oil pressure suddenly drops, and the outlet valve quickly closes under the action of the spring force, stopping the oil supply. Afterwards, the plunger will continue to move upwards. When the protruding part of the cam rotates past, under the action of the spring, the plunger will move downwards again. At this point, the next cycle begins.
Bosch Rexroth plunger pump 32R series in Germany, with spot advantage quotation
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The domestic series of plunger fuel injection pumps mainly include A, B, P, Z, and I, II, III series. Serification is based on the different requirements for fuel supply in the single cylinder power range of diesel engines, using plunger stroke, pump cylinder center distance, and structural type as the basis, and then matching with different sizes of plunger diameters to form several types of fuel injection pumps with varying fuel supply in one working cycle, in order to meet the needs of various diesel engines. The working principle and structural type of domestic series fuel injection pumps are basically the same. Taking Type A pump as an example, this article introduces the structure and working principle of plunger fuel injection pumps. A plunger pump consists of four main parts: a sub pump, an oil volume adjustment mechanism, a transmission mechanism, and a pump body. The latest domestically produced intelligent plunger pump is controlled by a microprocessor, displayed on a LCD screen, and can communicate with a computer. It has the characteristics of stable working pressure, small pulsation, and easy operation. Widely used in industries such as biochemistry, pharmaceuticals, chemicals, and environmental protection.