German Ergonomix pump Ergonomix model Ergonomix price

Ergonomix pumps are an important component in hydraulic systems. They rely on the reciprocating motion of plungers within the cylinder block to change the volume of the sealed working chamber, thereby achieving oil suction and discharge. Plunger pumps offer advantages such as high rated pressure, compact structure, high efficiency, and convenient flow regulation. Plunger pumps are widely used in applications requiring high pressure, large flow rates, and flow adjustment, such as hydraulic presses, construction machinery, and ships.

Ergonomix 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 main structural components include 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; downward motion sucks oil, and upward motion discharges oil. The volume of oil discharged per revolution of the pump is called displacement, which depends only on the pump's structural parameters. 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 through an eccentric shaft, achieving liquid suction and discharge. They also use valve-type distribution devices and are mostly 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. Their operating principle relies on the rotation of the crankshaft to drive pistons in reciprocating motion, achieving liquid suction and discharge. 3) Axial type: Axial plunger pumps (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 components, they can achieve very high precision fits, 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, the machine must only be operated after the hydraulic tank reaches the required operating pressure following each startup. If the machine is started when the air pressure in the hydraulic tank is insufficient, it can cause detachment of the slipper shoes inside the hydraulic pump, leading to abnormal wear between the return plate and the pressure plate within 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 shock-resistant, have longer service lives, and offer higher control precision than axial plunger pumps. For pumps with short variable strokes, displacement variation is achieved by changing the eccentricity of the stator under the action of the variable plunger and limit plunger. The maximum eccentricity of the stator is 5–9mm (depending on 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, giving the pump fast response speed. The radial design overcomes issues such as uneven slipper shoe wear found in axial plunger pumps, significantly improving shock resistance. 6) Hydraulic type: Hydraulic plunger pumps rely on pressurized hydraulic tanks. After each machine startup, operation must wait until 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, though some hydraulic pumps have built-in boost pumps to supply pressure oil to the inlet. Self-priming hydraulic pumps have strong self-priming capabilities and do not require external oil supply.

Ergonomix pump operating mode

During operation, the cam on the fuel injection pump camshaft and the plunger spring force the plunger to reciprocate up and down, thereby completing the pumping task. The pumping process can be divided into the following three stages. Conclusion: From the above discussion, the following conclusions are drawn: (1) The total reciprocating stroke L of the plunger is constant and determined by the cam lift. (2) The fuel supply volume per plunger cycle depends on the supply stroke, which is variable and not controlled by the camshaft. (3) The start timing of fuel supply does not change with variations in the supply stroke. (4) Rotating the plunger changes the end timing of fuel supply, thereby altering the fuel supply volume. 3. Domestic series plunger fuel injection pumps: Domestic series plunger pumps mainly include A, B, P, Z, and Series I, II, III. Standardization is based on different fuel supply requirements according to the single-cylinder power range of diesel engines. Using plunger stroke, pump cylinder center distance, and structural type as the basis, different plunger diameters are paired to form several types of fuel injection pumps with varying fuel supply volumes per working cycle, meeting the needs of various diesel engines. The working principles and structural types of domestic series fuel injection pumps are basically the same. Taking the A type pump as an example, the structure and working principle of plunger fuel injection pumps are introduced. The plunger pump consists of four main parts: the pumping element, fuel quantity adjustment mechanism, drive mechanism, and pump body. It features microprocessor intelligent control, LCD display, and communication with computers, offering stable working pressure, low pulsation, and easy operation. It is widely used in biochemistry, pharmaceuticals, chemicals, environmental protection, and other industries, meeting the requirements for continuous constant-pressure and constant-flow liquid transport in these sectors.

Ergonomix pump selection

The function of a vacuum pump is to remove gas molecules from the vacuum chamber, reducing the gas pressure inside to achieve the required vacuum level. Broadly speaking, there is a wide range from atmospheric pressure to ultra-high vacuum, and no single vacuum system can cover this entire range to date. Therefore, to meet process indicators, work efficiency, and equipment service life requirements for different products, different vacuum system configurations must be selected for different vacuum ranges. To achieve optimal configuration, the following points should be considered when selecting a vacuum system: First, check and determine the vacuum level required for each process. Since each process has its applicable vacuum range, it must be carefully studied and determined. Based on the determined process vacuum requirement, check the ultimate vacuum of the vacuum pump system, as the system's ultimate vacuum determines its optimal operating vacuum. Generally, the system's ultimate vacuum is 20% lower than the system's operating vacuum, and 51% lower than the ultimate vacuum of the forepump. Check and determine the type of gas to be pumped and the pumping speed required. If the pumped gas reacts with the liquid inside the pump, the pump system will be contaminated. Simultaneously, appropriate exhaust time and the amount of gas generated during the pumping process must be considered. Check and determine the time required to reach the required vacuum, as well as the flow resistance and leakage of the vacuum piping. Consider the pumping speed needed to maintain the vacuum under certain process conditions after the required vacuum level is achieved.

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