German BOSCH pump BOSCH model BOSCH price

BOSCH pump is a typical positive displacement hydraulic machine, driven by a prime mover, converting input mechanical energy into liquid pressure energy, and then inputting it into the system in the form of pressure and flow. It is the power source of the hydraulic system. Since it can transport liquids under high pressure, it is widely used in various industries in industrial production and daily life, such as water conservancy, construction, and energy. In addition, it is also widely used in shipbuilding, oil extraction, and loaders.

BOSCH pump usage method

For plunger pump cylinders with inserted copper sleeves, installation can be performed by replacing the copper sleeves. First, trim the outer diameters of a set of plunger rods to a uniform size, and then polish the outer diameter with sandpaper of 1000# or higher. Three methods for installing copper sleeves in the cylinder block: a) Heating the cylinder block for hot fitting or cryogenic compression of the copper sleeve for interference fit; b) Adhesive assembly using Loctite; this method requires grooves on the outer diameter surface of the copper sleeve; c) Tapping the cylinder bore, machining threads on the outer diameter of the copper sleeve, applying Loctite, and screwing it in for assembly. Installation methods for cylinder blocks and copper sleeves combined by sintering are as follows: a) Use a grinding rod to manually or mechanically grind and repair the cylinder bore; b) Use a coordinate boring machine to re-bore the cylinder block hole; c) Use a reamer to repair the cylinder block hole. Methods using "surface engineering technology" are as follows: a) Electroplating technology: Plate a layer of hard chrome on the plunger surface; b) Brush plating technology: Brush plate wear-resistant materials on the plunger surface; c) Thermal spraying, arc spraying, or electric spraying: Spray high-carbon martensitic wear-resistant materials; d) Laser cladding: Clad high-hardness wear-resistant alloy powder on the plunger surface. e) For cylinder blocks without copper sleeves, the cylinder material is mostly nodular cast iron, preparing an amorphous film or coating on the inner wall of the cylinder. Because of this special substance on the inner wall of the cylinder bore, a hard-hard friction pair can be formed.

BOSCH pump classification

Plunger pumps are generally divided into single plunger pumps, horizontal plunger pumps, axial plunger pumps, and radial plunger pumps. 1) Single plunger pump: The structural composition mainly includes an eccentric wheel, plunger, spring, cylinder block, and two check valves. A sealed volume is formed between the plunger and the cylinder bore. One rotation of the eccentric wheel causes the plunger to reciprocate once, sucking oil during downward motion and discharging oil during upward motion. The volume of oil discharged per revolution of the pump is called displacement, which is only related to the structural parameters of the pump. 2) Horizontal plunger pump: Horizontal plunger pumps consist of several plungers (generally 3 or 6) installed in parallel. A 1 crankshaft drives the plungers to reciprocate via connecting rod sliders or directly via an eccentric shaft, realizing a hydraulic pump for suction and discharge of liquids. They all use valve-type distribution devices, and most are fixed-displacement pumps. Emulsion pumps in coal mine hydraulic support systems are generally horizontal plunger pumps. Emulsion pumps are used at coal mining faces to provide emulsion for hydraulic supports. The working principle relies on the rotation of the crankshaft to drive the Piston to reciprocate, realizing liquid suction and discharge. 3) Axial type: Axial Piston pump (English name: Piston pump) are plunger pumps where the reciprocating motion direction of the piston or plunger is parallel to the central axis of the cylinder block. Axial plunger pumps operate by utilizing the volume change generated by the reciprocating motion of plungers parallel to the drive shaft within the plunger bores. Since both the plunger and the plunger bore are circular parts, they can achieve high-precision mating, resulting in high volumetric efficiency. 4) Straight-axis swashplate type: Straight-axis swashplate plunger pumps are divided into pressure-supply type and self-priming type. Pressure-supply hydraulic pumps mostly use pressurized tanks. For hydraulic tanks relying on air pressure for supply, after each machine start-up, operation can only proceed after the hydraulic tank reaches the required operating pressure. If the machine is started when the air pressure in the hydraulic tank is insufficient, it will cause detachment of the slipper shoes inside the hydraulic pump, leading to abnormal wear between the return plate and the pressure plate in the pump body. 5) Radial type: Radial plunger pumps can be divided into two categories: valve distribution and shaft distribution. Valve-distribution radial plunger pumps have disadvantages such as high failure rates and low efficiency. Shaft-distribution radial plunger pumps developed in the 70s and 80s internationally overcame the shortcomings of valve-distribution radial plunger pumps. Due to the structural characteristics of radial pumps, shaft-distribution radial plunger pumps are more impact-resistant, have longer service lives, and offer higher control precision than axial plunger pumps. The variable displacement of short-stroke variable pumps is achieved by changing the eccentricity of the stator under the action of the variable plunger and limit plunger, with the maximum eccentricity of the stator being 5–9mm (depending on the displacement size), resulting in a very short variable stroke. Furthermore, the variable mechanism is designed for high-pressure operation and controlled by a control valve, hence the pump has a fast response speed. The radial structural design overcomes problems such as uneven wear of slipper shoes in axial plunger pumps, significantly improving its impact resistance. 6) Hydraulic type: Hydraulic plunger pumps rely on pressurized hydraulic tanks. After each machine start-up, operation can only proceed after the hydraulic tank reaches the required operating pressure. Straight-axis swashplate plunger pumps are divided into pressure-supply type and self-priming type. Pressure-supply hydraulic pumps mostly use pressurized tanks, while some hydraulic pumps have a built-in boost pump to provide pressure oil to the hydraulic pump inlet. Self-priming hydraulic pumps have strong self-priming capabilities and do not require external oil supply.

BOSCH pump maintenance

(1) Inspect the plunger for scratches and corrosion; replace with a new part if necessary. (2) Check the fit of the plunger assembly. Insert the plunger end into the plunger barrel and tilt it approximately 60°; if the plunger slides down slowly under its own weight, the fit is good. (3) Check the sealing of the plunger assembly. Hold the plunger barrel, block the oil inlet at the top and side of the plunger with two fingers, and pull out the plunger with the other hand. Significant suction felt, and the plunger immediately retracting to its original position upon release, indicates good sealing of the plunger assembly; otherwise, replace the plunger assembly. (4) Inspect the decompression band of the delivery valve assembly for wear, steps, or scratches; replace if necessary. (5) Check the fit of the delivery valve assembly. Block the lower hole of the delivery valve with one finger, gently press the delivery valve downward with another finger, and when the finger is removed from the top of the delivery valve, if it automatically springs back to its original position, the delivery valve assembly seals well; otherwise, replace the delivery valve assembly. (6) Inspect the tappet body. The standard clearance between the injection pump body and the tappet body is 0 to 0.03mm; if it exceeds 0.2mm, replace the parts. (7) Check the clearance between the plunger flange and the groove of the control sleeve, which should be 0.02 to 0.08mm; if it exceeds 0.12mm, the control sleeve must be replaced.

Weidou Intelligent Technology specializes in selling German BOSCH plunger pumps, BOSCH gear pumps, BOSCH diaphragm pumps, BOSCH centrifugal pumps, BOSCH plunger pumps, BOSCH vacuum pumps, BOSCH screw pumps, BOSCH submersible pumps, BOSCH peristaltic pumps, BOSCH lubrication pumps, BOSCH vane pumps, BOSCH metering pumps, BOSCH hand pumps, BOSCH drum pumps, BOSCH cam pumps, BOSCH booster pumps, BOSCH liquid pumps, BOSCH air pumps. Original imports from Germany. Welcome inquiries and orders from users.