Piston Motors Manufacturers

How to adjust displacement and control flow of Piston Motors of Shertech Hydraulic Co., Ltd.

Piston motors, particularly those manufactured by SherTech Hydraulic Co., Ltd., are known for their high efficiency and versatility in hydraulic applications. One of the key features of these motors is the ability to adjust displacement and control flow, which is crucial for optimizing performance in various hydraulic systems. This flexibility allows the motor to adapt to changing load demands, provide variable speed and torque, and improve system efficiency.

The displacement of a piston motor refers to the volume of hydraulic fluid that the motor displaces per revolution of its shaft. This directly affects the motor’s torque output and speed, making displacement adjustment an essential feature in many hydraulic systems.

SherTech piston motors offer different methods for adjusting displacement, depending on the type of motor (fixed displacement or variable displacement). Here’s how displacement can be adjusted:

Variable displacement piston motors are equipped with mechanisms that allow for the adjustment of the motor's displacement, which in turn adjusts the flow rate and torque output. SherTech’s variable displacement piston motors typically use the following methods for adjustment:

In these motors, the displacement is adjusted by varying the angle of the swashplate. The swashplate controls the stroke length of the pistons, and by changing the angle of the swashplate, the volume of hydraulic fluid moved by the pistons per revolution can be increased or decreased. This mechanism provides smooth and continuous displacement variation, making it ideal for applications requiring dynamic flow control.

The swashplate angle can be adjusted via an external control signal, often from a hydraulic or electronic control unit (ECU). The angle can range from 0° (minimum displacement) to a maximum angle (maximum displacement). This allows for precise control of the motor’s output to match the load and speed requirements.

Some SherTech piston motors are equipped with proportional displacement control, where the displacement is adjusted in direct response to the load or operational conditions. This allows for energy-efficient operation, especially in variable load systems.

In more advanced systems, the displacement of the piston motor can be controlled electronically or hydraulically. For example, SherTech’s variable displacement piston motors may include electronic sensors and controllers that precisely manage the swashplate angle, allowing for remote or automatic adjustment of displacement in response to real-time system demands.

For fixed displacement motors, the displacement is set at the factory and cannot be adjusted during operation. However, the flow rate and speed of the motor can still be influenced by controlling the input flow of hydraulic fluid to the motor. In these cases, other methods, such as flow control valves, are used to regulate the motor’s operation.

The flow to a piston motor directly influences its speed and performance. To ensure the motor operates efficiently and meets the system’s needs, controlling the flow of hydraulic fluid is essential. SherTech piston motors provide several ways to regulate flow:

Flow control valves are commonly used in conjunction with piston motors to regulate the flow of hydraulic fluid. These valves can be placed before or after the motor to maintain a consistent flow rate. The most common types of flow control valves include:

This type of valve adjusts the flow rate based on the pressure within the system, ensuring that the motor receives a constant flow regardless of varying load conditions. This is particularly useful in applications where the load fluctuates and the motor needs to maintain a consistent speed.

A simpler valve that adjusts the flow but does not compensate for pressure changes. This type of valve is typically used in systems where load conditions are predictable and stable.

These valves adjust the flow proportionally based on an external input (e.g., from a control system or sensor). This type of valve is commonly used in applications where precise flow control is needed, such as in mobile machinery or variable-speed systems

In systems with multiple piston motors or hydraulic circuits, flow dividers can be used to distribute flow evenly between motors. By splitting the flow from a single pump, flow dividers ensure that each motor receives the appropriate amount of fluid. This is crucial in systems that require synchronized operation of multiple motors, ensuring uniform torque and speed across all motors.

The speed of a piston motor is directly proportional to the flow rate of the hydraulic fluid. By adjusting the flow rate, the speed of the motor can be controlled. This can be done in several ways:

A variable displacement pump can be used to provide adjustable flow to the piston motor. As the displacement of the pump changes, the flow rate to the motor is varied, which in turn adjusts the motor’s speed.

In some applications, the flow can be manually adjusted using a flow control valve. This method is often used in smaller systems or in applications where only occasional adjustments are necessary.

For more sophisticated systems, SherTech piston motors can be integrated with electronic control units (ECUs) that adjust the flow of hydraulic fluid based on sensor inputs. This allows for precise and real-time control of the motor’s speed, making it ideal for automated systems or applications with dynamic load conditions.

Whether in fixed or variable displacement configurations, the ability to fine-tune displacement and flow ensures optimal motor speed, torque, and efficiency, which is essential for maximizing productivity and minimizing energy consumption in hydraulic systems.