Какие дополнительные принадлежности имеются у поршневого насоса REXROTH A11V095DRG/10R-NSD12N00?

Bosch REXROTH's A11V095DRG/10R-NSD12N00 piston pump belongs to the swash plate axial plunger variable pump (open circuit, 

pressure level 315bar/31.5MPa), and its accessories mainly revolve around the core working parts and wearing parts.The 

following is the classification and description of typical accessories for this model：

1. Core working components

These are the key structures of the pump to achieve the function of oil absorption and discharge. 

They need to be replaced when worn or damaged.：

Cylinder Block (Cylinder Block)

The plunger rotates in it and cooperates with the oil distribution pan to complete the oil distribution.The end face of the

cylinder block needs to be precisely fitted with the oil distribution pan, which will cause internal leakage after wear.

Plunger & Slipper Assembly (Piston & Slipper Assembly)

Plunger: Reciprocating movement produces oil absorption and discharge, and the surface coating (such as chrome) needs to be 

replaced after wear.

Sliding shoe: The plunger head is in contact with the swash plate (lubricated by an oil film). Wear on the bottom surface of 

the sliding shoe or the surface of the swash plate will cause leakage or abnormal noise.

Swashplate (Swashplate)

Control the stroke of the plunger (change the displacement), and the surface of the swash plate needs to be machined with high 

precision (in conjunction with the sliding shoe).Surface wear or angle deviation can affect the output characteristics of the pump.

Oil distribution plate (Port Plate)

Separate the oil suction chamber and the oil discharge chamber, and the end face is precisely bonded to the cylinder block (forming

a seal).After wear and tear, the high and low pressure cavities will collude and the internal leakage will increase.

Spindle and Bearing Assembly (Drive Shaft & Bearing Assembly)

Spindle: Transmitting power (connecting the motor/engine), keyway or journal wear will affect the transmission.

Bearings: Support the spindle and cylinder block to withstand radial/axial forces (such as cylindrical roller bearings and thrust 

bearings).Bearing damage can cause vibration, noise or leakage.

2. Accessories for variable control mechanism

This model is a variable pump (the “G” in DRG may refer to a certain control method, such as pressure compensation or load sensitivity),

and the parts of the control mechanism affect the accuracy of displacement adjustment.：

Control Piston (Control Piston)

In the variable mechanism, the piston that pushes the swash plate to change the angle, 

the wear of the seal will cause the control pressure to leak and the displacement adjustment to fail.

Regulating Valve (Regulating Valve)

Such as Pressure Cut-off valve (Pressure Cut-off valve), flow control valve, etc., to control the output pressure or flow of 

the pump.Wear or stagnation of the valve core can cause misalignment of control.

Servo Valve/Proportional Valve (Servo Valve/Proportional Valve)

If it is electro-hydraulic control, the servo valve is used to accurately adjust the control pressure. The wear of the spool/valve

sleeve will affect the response speed and accuracy.

Spring (Spring)

Such as the return spring of the swash plate and the return spring of the control piston, fracture or decreased elasticity will

cause the angle of the swash plate to be abnormal (such as the inability to return to the center position).

3. Sealing and lubrication accessories

Prevent oil leakage and ensure internal lubrication：

Seal Kit (Seal Kit)

Including shaft seals (drive shaft seals), O-rings (cylinder block/oil distribution pan/shell seals), 

dust rings (to prevent impurities from entering), etc., aging or wear will cause external leakage (oil seepage).

Lubricating oil channel for sliding boots

A lubricating oil film is required between the slip shoe and the swash plate (oil is supplied through the oil channel inside the 

pump). Blockage of the oil channel or failure of the seal will cause dry friction (burn) of the slip shoe.

Fourth, auxiliary function accessories

Oil filter element (Filter Element)

Some pumps have a built-in oil filter (oil suction port or shell oil return port), and clogging of the filter element will lead

to insufficient oil absorption or system pollution.

Leaking tubing and fittings (Case Drain Hose & Fitting)

Connect the shell oil leakage port (Case Drain) to discharge the leaked oil in the shell (to prevent excessive pressure).Blockage

of the pipeline will cause the pressure of the housing to exceed the standard (damage the seal).

Pressure Sensor port (Pressure Sensor Port)

If the pump integrates a pressure monitoring function, the interface is used to install a pressure sensor (monitoring the outlet pressure).

5. Special design related accessories (NSD12N00 logo)

The “NSD12N00” at the end of the model may involve special functions (such as axial compensation, bearing type, etc.)：

Axial compensation mechanism parts

If "NSD" refers to axial compensation (Negative displacement Control), it may include compensation pistons, springs, etc., 

which are used to maintain the contact force between the boot and the swash plate (to adapt to thermal expansion or wear).

Bearing type

“NSD" may correspond to special bearings (such as high-carrying capacity bearings), and related bearing parts (such as rollers and 

cages) need to be replaced when they wear out.

summary

The accessories of A11V095DRG/10R-NSD12N00 are mainly based on the core working parts (cylinder block, plunger, swash plate, etc.), 

variable control mechanism (control piston, control valve, etc.), and seals. Repair kit (including wearing parts: seals, 

sliding boots, plungers, springs, etc.) is usually used for maintenance.It is recommended to refer to Bosch Rexroth's 

official "Repair Manual" or contact an authorized service provider to obtain an accurate list of accessories for this model

(there may be differences in different batches or special configurations).