Product Features of HCM Hydraulic Motor

The HCM hydraulic motor is a new-type product independently developed by our company with design improvements based on Italian technology, integrating years of practical experience. Its main features are as follows:

There is no lateral force between the piston and the swing cylinder; the bottom of the piston is designed with hydrostatic balance; and torque is transmitted between the piston and the crankshaft via rolling bearings. All these design elements reduce friction losses during power transmission. Therefore, the HCM series hydraulic motor features high mechanical efficiency and a high starting torque (with a mechanical efficiency of over 0.92 during startup).

The flat port plate is simple and reliable, which enhances sealing performance—resulting in excellent low-speed stability and minimal leakage. A plastic piston ring is used to seal the gap between the piston and the swing cylinder, achieving zero leakage. Thus, the motor boasts high volumetric efficiency (up to 0.98).

The structural design reduces friction losses and improves sealing performance, ensuring excellent low-speed stability. The motor can operate stably at a working condition of 1 r/min and has a wide speed regulation range (with a speed adjustment ratio of up to 1000).

The piston and bearing sleeve are tightly attached via a snap ring with no clearance. As a result, this series of hydraulic motors can operate under pump working conditions; when the oil inlet is closed, the motor can run at high speed under free-wheel working conditions.

The HCM series hydraulic motor supports high operating pressure, with a maximum pressure of up to 45 MPa. It also features light weight, compact size, and high power density.

Owing to its simple structure, reasonable design, and adoption of bearings with high load-carrying capacity, the motor ensures reliable operation, long service life, and low noise. Its drive shaft can withstand radial loads, and the rotation direction is reversible.

Precautions to Note During the Entire Maintenance Process

Adopt scientific and reasonable maintenance methods to reduce or minimize unnecessary disassembly.

For faulty parts and related components (whether to be repaired or replaced), necessary inspections must be conducted before installation to prevent the recurrence of faults.

For parts with recurring faults, it is essential to identify the root cause and conduct a comprehensive analysis. Under no circumstances should it be assumed that a fault is solely caused by the wear of a specific part, and that replacing the part will completely eliminate the fault. It is imperative to find out the real reason for the part's wear before proceeding with installation—this ensures the mechanical stability and achieves the goal of completely resolving the issue.

Attach great importance to the cleaning of disassembled parts (the higher the precision of the part, the stricter the requirement for cleanliness, especially for hydraulic motor speed control components). Failure to meet cleanliness standards will accelerate part wear, reduce the original precision and stability of the machinery. If disassembled, repaired, or installed parts are not cleaned, sand and debris may be brought into the interior of the machinery. When the machinery operates, such sand and debris will enter bearings, relative moving surfaces, or force-transmitting surfaces, leading to faults such as scratches, abrasion, seizing, valve core jamming, hydraulic pressure loss of control, oil leakage at seals, thread damage, failure to meet standard tightening torque, and loosening/falling off. Therefore, for swing-cylinder hydraulic motors, special attention must be paid to the cleanliness of components.