Method for analyzing energy loss of hydraulic system of loader working device
A technology of working device and hydraulic system, which is applied in the testing of fluid pressure actuating system, fluid pressure actuating device, mechanical equipment, etc., can solve the problem that the specific specific gravity cannot be determined, and the key points of energy saving of the hydraulic system of the loader cannot be quantitatively analyzed and determined. and difficulties
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Embodiment 1
[0061] Example 1: Energy consumption analysis of the working condition of bucket retraction
[0062] Simulation model see figure 1 , the simulation results see Figure 4 , Figure 5 , Image 6 , the test results are shown in Fig. Figure 9 , Figure 10 , power curve see Figure 11 .
[0063] During the action of bucket retraction, the energy provided by the working pump includes the energy of pushing the piston rod of the bucket cylinder to do work on the six-bar linkage mechanism, the high-pressure overflow loss generated by the safety valve, the throttling loss of the multi-way valve and the along-side of the pipeline. process loss. The product of the flow rate of the working pump and the pressure at the pump port under the working condition of the bucket retracted is the power generated by the working pump. Among them, Pmech is the output power of the pump, PA is the power of the large cavity of the bucket cylinder, PB is the power consumed by the small cavity of th...
Embodiment 2
[0071] Embodiment 2: energy consumption analysis of boom lifting working condition
[0072] Combined with the simulation results and test results, the energy loss under the boom lifting condition is analyzed.
[0073] Simulation model see figure 1 , the simulation results see figure 2 , image 3 , Image 6 , see the test results Figure 7 , Figure 8 , power curve see Figure 12 .
[0074] At the initial moment of boom lifting, due to the gravity of the bucket and the instantaneous opening of the boom-link reversing valve, the working pump produces relatively large pressure fluctuations, and then the pressure of the boom cylinder gradually increases during the lifting process. until the boom lifts to the upper limit position.
[0075] On the one hand, the energy generated by the working pump pushes the boom cylinder to overcome the gravity of the six-bar linkage to do work, and on the other hand, it provides the overflow loss of the overflow valve and the throttling l...
Embodiment 3
[0083] Example 3: Energy consumption analysis of bucket unloading and bucket collection
[0084] Simulation model see figure 1 , the simulation results are shown in Fig. Figure 4 , Figure 5 , Image 6 , the test results are shown in Fig. Figure 9 , Figure 10 , power curve see Figure 13 .
[0085] In the working conditions of bucket unloading and bucket retraction, the bucket cylinder first enters oil from the small chamber and returns oil from the large chamber. During the bucket retraction stage, the bucket cylinder enters oil from the large chamber and returns oil from the small chamber. The power of the large and small chambers of the bucket cylinder and the working pump Power such as Figure 13 shown. Among them, Pmech is the output power of the pump, PA is the power of the large cavity of the bucket cylinder, PB is the power consumed by the small cavity of the bucket cylinder, and PCD is the total power of the bucket cylinder.
[0086] Since the center of gr...
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