Analysis of the causes of instability in hydraulic lift platforms

Hydraulic Lifting Platform: For those familiar with hydraulic lifting platforms, the analysis and countermeasures for unstable lifting speed are as follows: After using the hydraulic lift, the basic functional requirements can be met. From the on-site usage, the smoke shell slips, the rising position is difficult to detect, and there is an impact sound when rising. On-site observation shows that the lifting hydraulic cylinder's rising speed is too fast, increasing the failure rate and seriously affecting production efficiency. Analyzing the reasons for the unstable lifting speed of the lifting cylinder, there are many reasons for the unstable lifting speed of the lifting cylinder, whether in design, processing and manufacturing, or use. So, let's understand the reasons for the unstable lifting of the hydraulic lifting platform!

Regarding the faults existing in this hydraulic system, the speed stiffness theory was used to analyze the reasons for the unstable rising speed of the lifting hydraulic cylinder.

1) Lifting hydraulic circuit structure: Overflow valve, directional valve, directional valve, check valve, check valve (without throttle valve), lifting oil cylinder.

2) Establish a speed stiffness analysis formula for the lifting circuit. The flow rate flowing in the hydraulic cylinder, that is, the flow rate flowing in the one-way throttle valve, is the flow rate flowing in the throttle valve; the coefficient related to the throttle valve throttle hole shape and the viscosity of the working oil; AT is the flow area of the throttle hole (increasing without throttle); the pressure at the hydraulic pump outlet; P1 is the pressure in the suction chamber of the hydraulic cylinder, causing the piston area of the hydraulic cylinder to rise; the index determined by the throttle shape. The speed formula of the speed control circuit shows that when the opening area of the throttle valve remains unchanged, the output speed of the hydraulic cylinder will change with the change of the load. The degree of influence of load change on speed is expressed by speed stiffness t. As the load increases, the output speed of the hydraulic cylinder of the lift driver decreases to negative; to advance, add a negative sign to the formula. When substituting into the hydraulic lift, the larger the speed stiffness value of the inlet throttle circuit, the better the speed stability of the hydraulic circuit.

The following conclusions are drawn from the analysis of the hydraulic lifting platform.

1) When the load is unchanged, the smaller the inlet of the throttle port, the higher the speed stiffness of the system; conversely, the larger the opening area of the throttle valve, the lower the inlet.

2) When the load does not change, the speed stiffness is good at low speed, and when the load changes, the speed stiffness is good when the load is small.

3) Increasing the oil supply pressure and increasing the effective working area of the hydraulic cylinder can improve the speed stiffness.

In summary, the causes of many equipment failures are related to hydraulics. The main reason for this fault in the hydraulic lifting platform is the unreasonable design of the speed control circuit in the hydraulic system, which deserves the attention of relevant enterprises.

Hydraulic Lifting Platform The development trend of lifting has reached its peak. In order to improve site utilization, most manufacturers and individuals have chosen a large number of multi-story buildings. Therefore, this equipment also needs to be easily lowered up, down, left, and right to improve the efficiency of commodity use. Because ordinary elevators are expensive and have low load-bearing capacity, it is not suitable to load tens or hundreds of tons of goods. Therefore, a high load-bearing capacity hydraulic lifting platform has been developed and designed for production and cargo transportation. It has the characteristics of a lifting platform—safety and ultra-large load-bearing capacity, and it is easy to maintain, which has promoted the rapid development trend of this unique industrial chain.

The hydraulic lifting platform is a type of intelligent lifting platform mechanical equipment, which can be divided into mobile and portable, sliding, arm, fork, chain, loading and unloading platforms, etc. Lifting platforms are generally used for rescue and decoration. Ordinary elevators are expensive and have low load-bearing capacity, so loading tens or hundreds of tons of goods is unsuitable. Therefore, a high load-bearing capacity lifting platform has been developed and designed for production and cargo transportation. It has the characteristics of a lifting platform—safety and ultra-large load-bearing capacity, and it is easy to maintain, which has promoted the rapid development trend of this unique industrial chain.

The above is an analysis of the reasons for the unstable lifting of the hydraulic lifting platform. If you need to know more, please feel free to contact us!

Shandong Jiyang Machinery Factory Co., Ltd. mainly produces freight elevators, loading ramps, lifting platforms, lifts, lifting freight elevators, lifting platforms, electric lifts, hydraulic lifting platforms, hydraulic lifts, scissor lifts, guide rail lifts, hydraulic lifting platforms, fixed lifting platforms, guide rail lifting platforms, scissor lifting platforms, etc. The company has strong technical strength, excellent production equipment, advanced and reasonable technology, and complete testing methods. Our company is a participating drafting unit of the scissor-type hydraulic lifting platform standard. Products are widely used in engineering construction, industrial installation, equipment maintenance, factory maintenance, property management, three-dimensional warehouses, aviation, airports, ports, stations and many other industries and places.