| Hydraulic transmission GOP-900
is used as a component of hydro-mechanical gear boxes of heavy tracked
vehicles with weight of up to 60 t to provide stepless control of speed
when driving and turning the vehicle.
The hydraulic transmission is a monoblock that includes two radial-piston
hydraulic machines (variable capacity pump and hydraulic motor) and hydraulic
equipment to provide protection from overload and functioning in closed
fluid circulation system.
Specifications
| output power |
up to 350 kW |
| rotatinal speed |
up to 3100 rpm |
| pressure |
up to 32 MPa |
| torque |
up to 2800 N.m |
| efficiency |
up to 80% |
| fluid temperature |
up to 130°Ñ |
| overall dimensions: |
|
| diameter |
560 mm |
| length |
215 mm |
| weight (without gear box driving shafts) |
260 kg |
When developing hydraulic transmission GOP-900, the following
scientific and technical tasks were solved:
- increase in wear resistance and heat resistance of cylinder-piston
components due to use of special fluids and materials that are nontraditional
for hydraulic drives;
- strength and stiffness of the design at limited radial and axial dimensions
of the hydraulic transmission;
- efficient lubrication of piston components, which resulted in better
performance during idling at max and min values of starter reactive
ring eccentricity and within whole rotational speed range;
- optimization of radial clearance in piston pairs and development of
calculation method for leaks;
- formation of configuration and conditions for the flow of fluid in
the casing of hydraulic transmission to minimize power loses.
Engineering and design solutions implemented in our hydraulic
radial ball transmissions provided high wear resistance of piston groups
and distributor unit, which was confirmed by durability tests.
Hydraulic ball piston transmissions and hydraulic machines based on them
(pumps and hydraulic motors) are one of prospective trends in development
of hydraulic drive due to simple design, superior performance and minimum
axial dimensions.
Hydraulic transmission GOP-900 developed in the CIS has no analogs in
the world in terms of capacity and max speed. Experience gained during
development and production activities makes it possible to extend the
nomenclature of hydraulic transmissions with respect to their capacity,
to develop split hydraulic transmissions for transport and stationary
machines as well as unique pumps capable to deliver up to 2000 l/min and
high-speed high-torque hydro-motors.
Hydrostatic transmission GOP-900 on test bench |
