Rexroth hydraulic motor balancing valve

Create Date: 2024-8-30 12:03:23|Source: Rexroth/Rexroth

The hydraulic motor is fixedly connected to the housing, and the oil propulsion rotor entering from the port rotates around a central point. This slow-rotating rotor drives the output through a splined shaft called a cycloidal hydraulic motor. After the advent of this early cycloid motor, another concept of motor began to take shape through decades of evolution. At the end of the 50s of the 19th century, the low-speed high-torque hydraulic motor was developed from a stator and rotor component of the oil pump, which consisted of an internal ring gear and a matching gear or rotor.

The gear hydraulic motor has poor dry sealing, low rental power, no high input oil pressure, and no large torque. And the instantaneous speed and torque change with the position of the meshing point, so the gear hydraulic motor is only suitable for high-speed and small torque occasions. It is generally used in construction machinery, agricultural machinery and mechanical equipment with low requirements for torque uniformity.

Hydraulic motor traditionally refers to the energy conversion equipment that outputs rotary motion and converts the hydraulic energy supplied by the hydraulic pump into mechanical energy. The low-speed hydraulic motor refers to the hydraulic motor with relatively low speed but large output torque, which is mainly used in injection molding machinery, ships, construction machinery, construction machinery, coal mining machinery, mining machinery, metallurgical machinery, ship machinery, petrochemical industry, port machinery, etc.

In addition to valve distribution, other forms of axial piston pump can be used as hydraulic motors in principle, that is, the axial piston pump and axial piston motor are reversible. The operating principle of the axial piston motor is that the oil distribution plate and swash plate are fixed, and the motor shaft and the cylinder block are connected and rotated together. When the pressure oil enters the plunger hole of the cylinder body through the window of the oil distribution plate, the plunger is stretched out under the action of the pressure oil, and is close to the swash plate, and the swash plate has a normal reaction force p to the plunger, and this force can be decomposed into axial component and straight component Q. Q is balanced with the hydraulic pressure on the plunger, and Q causes the plunger to generate a torque in the center of the cylinder, driving the motor shaft to rotate in a counterclockwise direction. The instantaneous total torque that occurs in an axial piston motor is pulsating. If the input direction of the motor pressure oil is changed, the motor shaft rotates in a clockwise direction. The change of the inclination angle a of the swash plate, i.e. the change of displacement, not only affects the torque of the motor, but also affects its speed and steering. The larger the inclination angle of the swash plate, the greater the torque and the lower the speed.

More on that

	Classification and function of Rexroth pressure control valves 1. Rexroth relief valve Overflow, pressure stabilizer, which is used to regulate and maintain the oil supply pressure of the pump while overflowing the excess oil in the system. When the regulated pressure is reached, the hydraulic system is controlled to keep it in a constant state. Relief valves for overload protection are called safety valves. ...
	How Rexroth hydraulic pumps are adjusted 1) Swash plate axial piston variable pump for open hydraulic rotation circuit 2) Mainly used in the field of mobile machinery 3) The pump works under the condition of self-priming, mailbox pressurization or with built-in suction pump, (centrifugal pump). 4) The output flow rate is proportional to the driving speed, ...
	Rexroth Hydraulic Pump - Oil Lift Piston Pump Parts Replacement Fault Repair The replacement specification of oil lift piston pump parts, when the various clearances listed are out of tolerance, can be corrected as follows: 1) If the cylinder body is inlaid with copper sleeve, it can be corrected by replacing the copper sleeve. First trim a set of plunger rods to a consistent size, and then polish the outer part with sandpaper of more than 1000#.
	Bosch Rexroth presents the EMC-HP series, a new member of the electric axis family ● Robust and precise thanks to the Planetary Screw Assembly (PLSA). ● Digital engineering: freely configurable with a range of different options ● Compact design for easy integration 　　Robust, precise and efficient: EMC-HP stands for press-fitting, riveting, positioning and testing.
	Applicability of Rexroth solenoid valves 1. Characteristics of the medium 1) Different varieties of solenoid valves are selected for gas, liquid or mixed state; 2) The medium temperature is different for products of different specifications, otherwise the coil will burn off, the seal will age, and the life of the product will be seriously affected; 3) The viscosity of the medium, usually below 50cSt. If...
	A brief introduction and classification of Rexroth hydraulic pumps Rexroth hydraulic pump is the power component of the hydraulic system, it refers to the oil pump in the hydraulic system, it is the hydraulic component that provides liquid for hydraulic transmission, and it is also a kind of pump. Its function is to convert the mechanical energy of the prime mover into the pressure energy of the liquid, that is, the hydraulic system is ...
	Rexroth and WAGO are working together to develop new industry solutions Automation experts work together to drive openness WAGO's own devices are equipped with the ctrlX OS Bosch Rexroth and WAGO are working together to develop new industry solutions As soon as the Bosch Rexroth operating system ctrlX OS was launched, it was on the market ...
	Rexroth hydraulic pump - gear pump common problems and solutions 1. Trapped oil (1) Causes The trapped oil of the gear pump is caused by the overlap coefficient of the gear design, as shown in the figure below, assuming that the length of the meshing line of the gear in the actual meshing is l and the tooth pitch is t0, then the overlap coefficient of the gear meshing is ε=l/t0. This overlap coefficient has such a ...
	How does a Rexroth proportional valve work? With the continuous progress of technology and the needs of market applications, the emergence of proportional valve is a more intelligent valve, which provides convenience for technicians, but also reduces the tedious work tasks, the most important structural unit of proportional valve is the proportional signal control system, which is based on the specific ring ...
	Rexroth servo valve debugging method The first step is the debugging of the zero position in the no-load state Most of the servo valves on construction machinery are used in conjunction with the reversing valve to achieve the purpose of controlling the hydraulic system. The servo valve plug-in can be unplugged on the site to prevent the servo valve from being energized and make it in a no-load state. Then, a manual or electric directional valve, ...
	Rexroth variable hydraulic pump pressure flow adjustment steps 1. First of all, adjust the pressure adjustment screw of Rexroth variable hydraulic pump relief valve to the loosest state, adjust the minimum flow limiter to the minimum state (the upper hydraulic cylinder adjusting screw is adjusted to the loosest state), adjust the flow control valve adjusting screw to the tightest state, and connect a flow rate in series after the relief valve.
	Rexroth's leading motion control technology – with innovative packaging that makes it easy The emergence of "ready-to-shelf cartons" has changed the situation by bringing retailers and consumers closer together with the new carton that combines fast shelf and display. After the goods are delivered to the supermarket, the staff only needs to open the closed boxes on all sides, and the cartons are "immediately" into pallets.
	Rexroth Hydraulic Pump - Introduction to Hydraulic Piston Pump and How to Maintain It 1. Hydraulic pump: Straight shaft swash plate piston pumps are divided into two types: pressure oil supply type and self-priming oil type. Most of the pressure oil supply hydraulic pumps use oil tanks with air pressure, and there are also hydraulic pumps with oil replenishment sub-pumps to provide pressure oil to the oil inlet of the hydraulic pump. The self-priming oil energy of the self-priming hydraulic pump ...
	Applicable environmental conditions for Rexroth solenoid valves 1) The maximum and minimum temperature of the environment should be selected within the allowable range; 2) When the relative humidity in the environment is high and there are water droplets and rain, waterproof solenoid valves should be selected; 3) Special varieties should be selected for occasions such as vibration, bumps and shocks in the environment, such as marine solenoid valves; ...
	Rexroth Hydraulic Pumps – Oil trapping and radial forces in gear pumps During the meshing process of the gear pump, the number of gear pairs meshed at the same time should be more than one pair, that is, the overlap coefficient ε should be greater than 1 (ε=1.4) to work normally. The oil left between the teeth is trapped in an enclosed space formed by two pairs of teeth meshing at the same time, and the volume of this space will be ...
	Failure analysis of Rexroth drives Common Failure Analysis: 1) Overcurrent fault: Overcurrent fault can be divided into acceleration, deceleration, and constant speed overcurrent. It may be caused by the acceleration and deceleration time of the inverter is too short, the load is abruptly changed, the load is unevenly distributed, and the output is short-circuited. At this time, it is generally possible to extend the addition and subtraction ...
	Rexroth A10VSO variable piston pump pressure flow adjustment steps 1. First, adjust the pressure adjusting screw of the relief valve to the loosest state, adjust the minimum flow limiter to the minimum state (the adjusting screw of the hydraulic cylinder in the upper part is adjusted to the loosest state), adjust the adjusting screw of the flow control valve to the tightest state, and connect a flowmeter in series after the relief valve; 2. Start-up fluid ...
	The causes and treatment methods of the unstable flow of Rexroth hydraulic pumps 1. Rexroth hydraulic pump has no flow rate. In fact, this is broadly similar to the reason why Rexroth hydraulic pumps have no pressure as mentioned earlier. Here can be referred to by the explanation of the past period, and a few points can be added. 1. Installed on Rexroth hydraulic pump ...
	Rexroth proportional valves – application considerations for proportional valves 1. Pollution control requirements for proportional valve operation The degree of contamination of the proportional valve to the oil is usually required to be 7-9 levels of NASl638 (ISO 16/13, 17/14, 18/15 levels), and the main link to determine this index is the pilot stage. Although electro-hydraulic proportional valves are more anti-fouling than servo valves ...
	Precautions for the installation of Rexroth pressure reducing valves 1. When installing, the tap water pressure reducing valve should be installed vertically on the tap water pipeline. 2. The arrow on the tap water pressure reducing valve must be consistent with the arrow on the pipeline. 3. The position of the installation of the pressure reduction method must be greater than 4 meters from the valve outlet. ...