The Various Functions Of A Single Acting Power Unit

Single acting power unit， As a fundamental component in hydraulic systems, it plays a crucial role in various industrial applications. Its simple design and compact structure give it a unique advantage in situations where unidirectional force output is required. This article will explore in detail the principle, structural characteristics, applications, advantages and disadvantages of the Single acting power unit, aiming to comprehensively understand this important hydraulic component.

The core principle of the Single acting power unit is to use the pressure of hydraulic oil to push the piston through the oil cylinder to produce unidirectional linear motion---h2

When the electric motor drives the Single acting hydraulic cylinder to operate, hydraulic oil is drawn into the pump and pressurized, and then enters the cylinder through the control valve. In the oil cylinder, pressurized hydraulic oil pushes the piston to move, thereby generating the required force. When the electric motor stops or the control valve switches, the pressure inside the oil cylinder is released, and the piston returns to its original position by external load, gravity, or the action of the built-in spring. It is worth noting that a single acting power unit can only actively generate force in one direction, while motion in the other direction depends on external factors.

A single acting power unit typically consists of an electric motor Single acting power unit、 Composition of main components such as fuel tank, control valve, and oil cylinder

The electric motor provides power to the Single acting hydraulic cylinder, which converts mechanical energy into hydraulic energy. The oil tank stores hydraulic oil and plays a role in heat dissipation. The control valve controls the flow and pressure of the hydraulic oil, while the oil cylinder converts hydraulic energy into mechanical energy and generates linear motion. These components are compactly integrated together, giving the Single acting power unit the characteristics of small size and light weight, making it easy to install and maintain.

The application range of Single Acting Power Unit is very wide

In the field of automobile maintenance, it is commonly used for equipment such as lifts; In the field of warehousing and logistics, it is used for hydraulic lifting platforms; In the field of construction machinery, it is used for equipment such as dump trucks. In addition, it is widely used in various automation equipment and industrial machinery that require unidirectional force output. The simplicity and reliability of its design make it the preferred choice for many application scenarios.

Single acting power units also have some limitations

Firstly, due to the fact that the Cilindro hidráulico de varilla única can only actively generate unidirectional force, it is necessary to coordinate with other components or mechanisms to achieve bidirectional motion in situations where it is required. Secondly, its motion speed and accuracy are affected by the piston return method, such as systems relying on gravity return, which have relatively low speed and accuracy. Finally, due to the release of pressure inside the cylinder, the piston relies on external factors to return, so in some special applications, additional safety measures may need to be taken to prevent the piston from accidentally descending.

In summary, single acting hydraulic cylinder, as a simple and reliable hydraulic component, plays an important role in many fields due to its compact design and one-way force output characteristics. Although there are some limitations, through reasonable selection and design, its advantages can be fully utilized to meet the needs of various practical applications. With the continuous development of technology, the performance and application scope of Single acting power units will also be further improved.

Single Acting Power Unit FAQs

What is the working principle of a Single Acting Power Unit?

The single acting power unit generates unidirectional pressure through the single acting power unit, and its characteristics include:

Only supply oil to one chamber of the cylinder (usually in the direction of piston rod extension)

Return journey relies on spring reset/gravity drop/mechanical external force

The system only requires a single hydraulic pipeline

Typical working pressure range 721MPa

2. Which devices commonly use Single Acting Power Units?

Typical application scenarios:

Agricultural machinery (straw baler, harvester lift)

Engineering vehicles (dump truck cargo box lifting)

Industrial equipment (stamping machine return device)

Ship (hatch opening and closing system)

(Note: Applicable to situations where only unidirectional work is required)

How to choose a single acting power unit with appropriate displacement?

Selection calculation formula:

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Pump displacement (ml/r)=(cylinder volume x number of actions)/(motor speed x efficiency coefficient)

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Cylinder volume=piston area x stroke

Efficiency coefficient is taken as 0.850.9

For example, if a 10L oil cylinder cycles 5 times per minute, choose a 10ml/r pump

How to solve the crawling phenomenon in the Single acting power unit system?

Troubleshooting steps:

1) Check the oil level in the fuel tank (if it is below the minimum mark, it needs to be refilled)

2) Remove air from the pipeline (35 full stroke reciprocating operations)

3) Check the oil suction filter (if the pressure difference is greater than 0.3 bar, it needs to be replaced)

4) Verify hydraulic oil viscosity (3246cSt at 40 ℃)

How to convert a single acting power unit to a double acting power unit?

Precautions for renovation:

Need to add directional valves and return oil pipelines

The oil cylinder must be transformed into a double acting structure

The system needs to add overflow valve protection

The motor power usually needs to be increased by 30%

(Suggestion: Do not modify unless necessary, it is more economical to replace directly)