Hydraulic Motor: The Backbone Of Mechanical And Engineering Industry

By Author: Graham Haynes
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A hydraulic motor is a mechanical actuator that converts hydraulic pressure and flow into torque and angular displacement (rotation). The hydraulic motor is the rotary counterpart of the hydraulic cylinder. Hydraulic motors are used in various mechanical and engineering works like mining, craning, winches, brakes, gearboxes, digging both offshore and onshore, heavy drilling etc. In short hydraulic motor performs all types of industrial and automated works which involves torque and angular displacement, commonly called rotation by converting fluid dynamics into hydraulic pressure and flow.

Hydraulic motor is produced in different types, according to the need and application by manufacturers like China winches, a part of Ningbo Victory group in the second largest port city of china, Ningbo. Most common among them are Staffa Motor, hagglunds motor, planetary gearbox, Hydraulic Winch apart from different types of generic Hydraulic Motor.

The Staffa motor produced by Chinawinches is of two types, Staffa HMC Motor with dual displacement and the other is Staffa HMB Motor with fixed displacement. The Staffa HMC Motor ...
... has the following features such as Replacement of original Kawasaki Staffa motor of same series, Consistent, controlled acceleration of loads with smooth, steady, low speed operation. Moving parts are immersed in hydraulic fluid, so Staffa motors do not require periodic lubrication. Saves money by increasing usable drive power and reducing drive train maintenance. The only fully hydrostatically balanced design in the industry. Less wear and superior starting torque because there is minimal metal-to-metal contact within the motor.

On the other hand Staffa HMB Motor has the following features; Replacement of original Kawasaki Staffa hydraulic motor of same series. Rugged, reliable, proven design. Unique Hydrostatic balancing provides minimum wear and extended life. High volumetric and mechanical efficiency. Large variety of Shaft and Porting options. Output torque up to 27483 Nm. Wide range of mounting interfaces available. Highly accurate electronic positional and velocity control systems also available.

Among the Hagglunds Motor produced by chinawinches the Hagglunds CA Motor has the following features such as Good anti-shock capability and stability; Stable speed switch and brake available; Enable free running working condition; Multi-mounting options; hollow shaft design; Large output torque; wide speed range; directly replace combined devices of high speed motor and gearbox; compact structure; Stable performance in low speed; Higher mechanical and volumetric efficiency; Reversible rotation; Higher power-mass ratio; Higher reliability; easy maintenance.

Among the other type of transmission drive Hydraulic motor produced by chinawinches , the planetary gearbox comes in six types according to various application and usage , viz. Hydraulic Planetary Gearbox Final Drive by Intermot IAM Hydraulic Motor, Hydraulic Planetary Gearbox Final Drive by Sai GM Hydraulic motor, KYB MSG Swing Drive Hydraulic Motor, Rexroth GFT Travel Drive Hydraulic Motor , Rexroth GFB Swing Drive Hydraulic Motor , KYB MAG Travel Drive Hydraulic Motor.

While Hydraulic Planetary Gearbox Final Drive by Intermot IAM Hydraulic Motor works on IMAT technology, the Hydraulic Planetary Gearbox Final Drive by Sai GM Hydraulic Motor operates on GMT technology. But both of them are equally efficient and capable of handling variety of transmission operational Final drive needs. Following are the features of both;
Both IMAT & GMT series hydraulic transmission Final drive can work under high pressure. Hydraulic oil: recommend using high quality, anti-foam and anti-oxidation mineral hydraulic oil. The ideal working oil temperature is 30℃ to 50℃ and the permissible oil temperature is between 20℃ to 80℃. When oil temperature is lower than 10℃ low-freezing hydraulic oil must be used. The viscidity of hydraulic oil is between 40-60 CST and the permissible viscidity is 5-300 CST. The recommended hydraulic oil filtering precision is 25μm or more precision. The hydraulic transmission device can rotate in both directions; which can be found in detail in the charts. If users require the equipment to rotate in opposite direction, please make notes when you place orders.

Positioning of oil drain: GMT transmission device allows to be installed in any direction. To ensure the lubrication of all kinematic pair, it’s required to fill hydraulic oil into the motor before Working. The selection of position of oil drain port must be able to ensure that the housing is full of hydraulic oil when it operates.

Selection of distributor: All sorts of hydraulic transmission device can select to use the distributors of various specific-actions according to the requirements of different working conditions. The principle for selection of distributor: to select distributor according to the using pressure, rotation speed, flow, connecting method and the requirements of the integrated valve group;
Installation of distributor: the direction of oil inlet and outlet of distributors allows rotating with interval of 72o around the external installation and connection location. However, when the distributor is rotated while the bolt is released be careful not to damage the seal function of plane O-ring. Both IAMT & GMT transmission Final drive can operate up to 70 meters or more deep under water.

Both Rexroth GFT Travel Drive Hydraulic Motor and Rexroth GFB Swing Drive Hydraulic Motor are extremely useful speed reducers under hostile operational conditions. They are accurate, efficient and robust under any condition and does the job of speed reduction extremely well. Both have similar features, viz. Compact dimensions, space-saving, two/ three-stage planetary gear design, Modular design of gear unit, Robust bearing system absorbing the forces exerted by the ring gear, Simple mounting and ease of maintenance, High performance, Long operation life, Integrated multiple-disk holding brake and Low-noise running
The KYB MAG Travel Drive Hydraulic Motor is primarily meant for crawler machines. It has high torque and high efficiency levels coupled with flexibility of operation by having various ratios and displacements available for customer needs. The main features of the motor are; hydraulically balanced piston motor ensures high-pressure high-performance operation. An offset-type 2-speed design ensures reliable changeover of the displacement by an external pilot control (speed ratios of between 1.5:1 and 2:1) The motor offers a built-in double counterbalance valve and shockless crossover relief valve, providing speed control and braking with minimum shock. The mechanical brake is a negative brake linked with the counterbalance valve. The brake is automatically activated or released when the vehicle stops or starts. The case-rotation type gear reducer has improved durability and reliability due to high precision parts and an equally-loaded design. The hydraulic motor uses heavy duty bearings to ensure long life. Floating seals also prevent dust or water from entering into the motor.

On the other hand KYB MSG Swing Drive Hydraulic Motor is a hydraulic swing motor with a speed reducer designed for the small construction vehicles (mini excavators). Compactly it incorporates various potions (parking brake, high-pressure relief valve, make-up valve, anti swing back valve, etc) for whirling round. It has the following Features; hydraulically balanced motor ensures high performance for a long time. Relief valve with shock-absorb function and make-up valve are appropriately integrated to shorten total length. Parking brake are equipped as standard. Delay valve of parking brake is available (option).Anti swing back valve is available (option) and the speed reducer is lubricated with motor drain oil (motor hydraulic oil) eliminating needs for gear oil.

Another form of hydraulic motor manufactured by chinawinches is the hydraulic winch, which is primarily used in construction and mining industry and more importantly in the marine industry as Anchor Winch and Anchor Windlass for anchorage application of boats of all sizes. The hydraulic winch are basically divided into two categories, viz. construction and mining and marine application. While the marine application is depended on the customer needs, for instance, the kind of hydraulic winch to be used as Anchor Winch and Anchor Windlass is immensely influenced by the shape and size of the boat, the kind of power supply, the nature of the rope, pros and cons of vertical and horizontal Hydraulic winch etc., the GMW powered Hydraulic winch and IAMW powered Hydraulic winch have same features for example, both GMW and IAMW series Hydraulic winch is composed with all sorts of distributors that consist of one-way balance valve, control brake, high pressure shuttle valve, GM type hydraulic motor, Z type brake, C type gearbox, and drum. Users only configure hydraulic power unit and change valve. As the Hydraulic winch has valve sets, it’s not only simplified the hydraulic system, but also enhances the working reliability of the transmission drives.

It can be applied in traction equipment, bedrail and automobile crane, pipe hoist machine, grab bucket, drilling machine, construction and marine industry.

Chinawinches prides itself in consistently indulging in research and development to manufacture world class hydraulic motors which are being used in various industry without any complain and unmatched efficiency, durability and low maintenance cost at unbeatable value. The testimony to the dedication of the company towards sustaining high standards of production of state of the art hydraulic motor of various usages lies in the fact that the company has received many certificates of excellence across the globe, viz. ISO 9001: 2000 certificate, GL certificate ( Germany ), LR certificate ( UK ), ABS certificate ( USA ), NK certificate ( Japan ), RINA certificate ( Italy ). All products of www.chinawinches.cn is approved by China Classification Society, CCS.

With competitive pricing, unbeatable value and prompt delivery, www.chinawinches.cn is living up to its motto ‘exist by quality, develop by credit’. Therefore, visit www.chinawinches.cn today and peruse our catalogue of world class products to establish a long sustainable business relationship.