1 Vessel Hydraulic motor Current situation of selection methods
Ship deck machinery and equipment play an important role in the overall performance of the ship, such as
The cargo lifting machinery and equipment interfere with the working efficiency of cargo handling; Who and E set ". All the machinery and equipment have an important impact on the use of ships. This kind of middle zone sound and eye adopts hydraulic system drivers, and the actuating elements are all hydraulic motors. The hydraulic motors have the advantages of large torque, large power volume ratio, stable operation, stepless speed change, good braking performance, etc., and at the same time have the corresponding overload protection level. According to the difference of ship type and tonnage, the design of hydraulic system and Marine anchoring hydraulic gear motor The selection of hydraulic system is also different. The design and improvement of hydraulic system are similar to the operation of pressure system label, such as safety research, environmental protection and energy conservation research. In the case of similar hydraulic systems, the hydraulic motor is used as the actuating element. The rational selection of hydraulic motor is particularly important for reducing system energy consumption, reducing noise, improving system efficiency and ensuring reliability indicators.
The basic parameters of hydraulic motor include pressure, flow, displacement, output power, etc. The hydraulic motor of marine winder is selected. At present, the required power is usually estimated, and then the torque of the required hydraulic motor is reversely pushed out. Then, the displacement and rotation speed of the required marine super hydraulic motor are determined according to the specific working conditions (such as larger and smaller speed); It can also calculate the displacement of the hydraulic motor according to the rotation speed of the required hydraulic motor and the flow calculation formula of the hydraulic system, and then select the model according to the displacement, query the sample, and select the hydraulic motor that meets the requirements. This type of hydraulic motor selection has simple working principle and is widely used, but simple estimation and selection with the help of relevant experience may cause the selected hydraulic motor to be mismatched with the specific working conditions. The in-depth analysis on the selection of hydraulic motors is relatively few at this stage. Usually, it is all the product parameters provided by the manufacturer. The customer makes a good selection according to the product parameters, which also belongs to the simple selection method of relevant empirical formula?. On the basis of the current selection mode of hydraulic motor, this paper points out a new way to do a good job in the selection of hydraulic motor.
Selection of hydraulic motor types
Generally, there may be many types of hydraulic motors that meet the requirements. To select a matching hydraulic motor, you must first know the suitable operating site of each type of hydraulic motor. Hydraulic motors can be classified into gear type, vane type, plunger type, cycloid type, steel ball type, etc. According to the rotating speed and torque, it can be divided into the following categories: high speed low torque motor, with a rotating speed of more than 500 r/min and a torque range of tens to hundreds of Nm. The key categories are gear type, high speed vane motor and axial plunger type. Their key advantages are high rotating speed, small moment of inertia, which is conducive to operation, braking, speed change and reversing. Their disadvantages are large torque pulsation Low working efficiency, small starting torque (only 60%~70% of the rated torque) and poor low-speed stability; Low speed and large torque motor, with rotation speed below 500rmin, and low rotation speed even several revolutions per minute, Low speed hydraulic motor The output torque is relatively large, and the torque range can reach thousands to tens of thousands of Nm. The key categories are low-speed vane type, radial plunger type, internal curve type, steel ball type, cycloidal type, etc. The main characteristics of the low-speed hydraulic motor are: large displacement, large volume, low rotation speed, which can be connected with the operating mechanism at the same time, without speed reducer, so that the transmission mechanism is greatly simplified, and the rotation speed pulse is relatively large. The main feature of hydraulic motor is its low stable performance rotation speed. The lower the rotation speed, the wider the range of hydraulic motor will be.
Low speed and large torque used on ships Piston Motors There are many kinds of hydraulic motors, such as five-star motors. To select the type that matches the working conditions of so many types of hydraulic motors, it is necessary to analyze some characteristics of specific types of hydraulic motors and select the characteristics of hydraulic motors that are suitable for the working conditions.
