Rexroth Rexroth pump PV7-1X/10-14RE01MC0-16

Rexroth Rexroth pump PV7-1X/10-14RE01MC0-16

Rexroth blade pump R900580381 PV7-1X/10-14RE01MC0-16 original stock, variable displacement pump, size 14 cm?, pressure 160 bar, suitable for industrial applications, open circuit

High reliability in industrial applications. Low noise and pulsation levels. Due to its high repeatability and low lag, it has precise control behavior. Can be flexibly combined with other pumps from Rexroth.

Rotating blade variable displacement pump

Suitable for industrial applications with open control loops

Equipped with NBR seal

Cast iron casing

Displacement type: Variable

Size [cm?]: 14

Maximum pressure [bar]: 160

Maximum flow rate [l/min]: 25.2

Direct train: with

Rotation direction: clockwise rotation

Axis type: cylindrical with assembly key

Component: 4-bolt flange 80 B4HW compliant with ISO 3019-2 and VDMA 24560

液压液： HLP、HLPD、HVLP、HVLPD

Seal: NBR

Weight [kg]: 12.1

Working principle of gear pump: Gear pump is a rotary pump that relies on the change and movement of the working volume formed between the pump cylinder and the meshing gear to transport liquid or increase its pressure. Two enclosed spaces are composed of two gears, a pump body, and front and rear covers. When the gears rotate, the volume of the space on the disengagement side of the gears increases from small to large, forming a vacuum that sucks in the liquid. The volume of the space on the meshing side of the gears decreases from large to small, and the liquid is squeezed into the pipeline. The suction chamber and the discharge chamber are separated by the meshing line of two gears. The pressure at the discharge outlet of the gear pump is fullIt depends on the magnitude of the resistance at the pump outlet. The concept of a gear pump is very simple, and its most basic form is two gears of the same size meshing and rotating with each other in a tightly fitting housing. The interior of this housing is similar to an "8" shape, with two gears installed inside. The outer diameter and sides of the gears are tightly fitted with the housing. The material from the extruder enters the space between two gears at the suction port and fills it. It moves along the shell with the rotation of the teeth and is finally discharged when the two teeth mesh.

The gear pump is driven by an independent motor, which can effectively block upstream pressure pulsation and flow fluctuations. The pressure pulsation at the outlet of the gear pump can be controlled within 1%. Using a gear pump on the extrusion production line can increase the flow output speed, reduce material shear and residence time in the extruder.

External gear pump is a widely used type of gear pump, usually referred to as an external gear pump. Its structure is shown in Figure 1, mainly composed of a driving gear, a driven gear, a pump body, a pump cover, and a safety valve. The sealed space formed by the pump body, pump cover, and gear is the working chamber of the gear pump. The axles of the two gears are respectively installed in the bearing holes on the two pump covers, and the driving gear shaft extends out of the pump body and is driven to rotate by the electric motor. The external gear pump has a simple structure, light weight, low cost, reliable operation, and wide application range.

When the gear pump is working, the driving wheel rotates together with the electric motor and drives the driven wheel to rotate accordingly. When the meshing teeth on one side of the suction chamber gradually separate, the volume of the suction chamber increases, the pressure decreases, and the liquid in the suction tube is sucked into the pump; The inhaled liquid is divided into two paths and pushed into the discharge chamber by the gear in the tooth groove. After the liquid enters the discharge chamber, due to the continuous meshing of the teeth of the two gears, the liquid is squeezed and enters the discharge pipe from the discharge chamber. The driving gear and the driven gear continuously rotate, allowing the pump to continuously suck in and discharge liquid.

The pump body is equipped with a safety valve. When the discharge pressure exceeds the specified pressure, the conveying liquid can automatically open the safety valve, allowing the high-pressure liquid to return to the suction pipe.

An internal gear pump consists of a pair of meshing internal gears and a crescent shaped component, pump casing, etc. in between. The function of the crescent shaped component is to separate the suction chamber from the discharge chamber. When the driving gear rotates, a local vacuum is formed at the place where the gear disengages, and the liquid is sucked into the pump to fill the teeth of the suction chamber. Then, it enters the discharge chamber in two paths along the inner and outer sides of the crescent shaped part. At the meshing point of the gear teeth, the liquid present between the teeth is squeezed and sent into the discharge pipe.

Gear pumps have the characteristics of self-priming ability, independent flow rate and discharge pressure, and no suction valve or discharge valve on the pump casing. They have a simple structure, uniform flow rate, and reliable operation. However, they have low efficiency, high noise and vibration, and are prone to wear. They are mainly used to transport various oils that are non corrosive, non solid particles, and have lubricating ability. The temperature generally does not exceed 70 ℃, such as lubricating oil, edible vegetable oil, etc. The general flow range is 0.045-30ms/h, the pressure range is 0.7-20MPa, and the working speed is 1200-4000r/min.

A pump is a mechanical device that transports or pressurizes fluids. It transfers the mechanical energy or other external energy of the prime mover to the liquid, increasing the energy of the liquid. The pump is mainly used to transport water, oil, acid-base liquid, emulsion, suspended lotion, liquid metal and other liquids, as well as liquid, gas mixture and liquid containing suspended solids. Pumps can usually be classified into three types based on their working principles: positive displacement pumps, power pumps, and other types of pumps. In addition to classification based on working principles, it can also be classified and named according to other methods. For example, according to the driving method, it can be divided into electric pumps and hydraulic pumps, etc; According to structure, it can be divided into single-stage pumps and multi-stage pumps; According to their purposes, they can be divided into boiler feed pumps and metering pumps, etc; According to the properties of the transported liquid, it can be divided into water pumps, oil pumps, and mud pumps. According to the presence or absence of a shaft structure, it can be divided into linear pumps and traditional pumps. Water pumps can only transport fluid based logistics and cannot transport solids.

working principle

The impeller is installed inside the pump casing and fastened to the pump shaft, which is directly driven by the motor. There is a liquid suction tube in the center of the pump casing. The liquid enters the pump through the bottom valve and suction pipe. The liquid discharge port on the pump casing is connected to the discharge pipe.

Before starting the pump, fill the pump casing with the liquid being transported; After starting, the impeller is driven by the shaft to rotate at high speed, and the liquid between the blades must also rotate along with it. Under the action of centrifugal force, the liquid is thrown from the center of the impeller to the outer edge and gains energy, leaving the outer edge of the impeller at high speed and entering the volute pump casing. In the snail shell, the liquid slows down due to the gradual expansion of the flow channel, and converts some of its kinetic energy into static pressure energy. Finally, it flows into the discharge pipeline at a higher pressure and is delivered to the required location. When the liquid flows from the center of the impeller to the outer edge, a certain vacuum is formed at the center of the impeller. Due to the pressure above the liquid level in the storage tank being greater than the pressure at the pump inlet, the liquid is continuously pressed into the impeller. It can be seen that as long as the impeller continues to rotate, the liquid will be continuously sucked in and discharged.

The working principle of a linear pump is different from any other pump. It uses the principle of magnetic levitation and a spiral ring fluid dynamics structure to achieve fluid propulsion, that is, to cancel the shaft, cancel the shaft connection, and cancel the shaft sealing structure. After startup, the current is converted into a magnetic field, which drives the spiral ring to operate, that is, the spiral ring lifts the fluid forward.

performance parameters

There are mainly flow rate and head, as well as shaft power, speed, and necessary cavitation allowance. Flow rate refers to the amount of liquid output through the pump outlet per unit time, generally using volumetric flow rate; Head is the energy increment per unit weight of liquid transported from the pump inlet to the outlet. For positive displacement pumps, the energy increment is mainly due to the increase in pressure energy, so it is usually expressed as pressure increment instead of head. The efficiency of a pump is not an independent performance parameter, it can be calculated from other performance parameters such as flow rate, head, and shaft power using formulas. On the contrary, given the flow rate, head, and efficiency, the shaft power can also be calculated.

PV7-1X/10-14RE01MC0-16 R900580381

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Rexroth blade pump PV7-1X/10-14RE01MC0-16 R900580381 working principle:

When the rotor of the vane pump rotates, the tips of the blades are tightly attached to the inner surface of the stator under the action of centrifugal force and pressure oil. The working volume formed by the two blades and the inner surfaces of the rotor and stator first absorbs oil from small to large, and then discharges oil from large to small. When the blades rotate once, they complete one oil absorption and discharge.

1、 Working principle of single acting vane pump

The pump consists of rotor 1, stator 2, blades 3, oil distribution plate, and end cap. The inner surface of the stator is a cylindrical hole. There is eccentricity between the rotor and stator. The blades can slide flexibly in the slots of the rotor. Under the centrifugal force during rotor rotation and the pressure oil flowing into the root of the blades, the top of the blades is tightly attached to the inner surface of the stator, forming sealed working chambers between two adjacent blades, oil distribution plate, stator, and rotor. When the rotor rotates counterclockwise, the blades on the right side of the figure extend outward, and the volume of the sealed working chamber gradually increases, creating a vacuum. Therefore, oil is sucked in through the suction port 6 and the window on the oil distribution plate 5. And on the left side of the picture. The blades retract inward, and the volume of the sealing chamber gradually decreases. The oil in the sealing chamber is squeezed out through another window of the oil distribution plate and the pressure port 1 and output into the system. This type of pump is called a single acting pump because it absorbs oil and pressurizes oil once during each rotation of the rotor. The rotor is subjected to radial hydraulic unbalance force, so it is also known as an unbalanced pump, and its bearing load is relatively high. Changing the eccentricity between the stator and rotor can change the displacement of the pump, so these pumps are all variable displacement pumps.

2、 Working principle of double acting vane pump

Its working principle is similar to that of a single acting vane pump, with the only difference being that the stator surface is composed of eight parts: two long radius arcs, two short radius arcs, and four transition curves, and the stator and rotor are concentric. When the rotor rotates clockwise in the diagram, the volume of the sealed working chamber gradually increases at the upper left and lower right corners, which are the oil suction area, and gradually decreases at the lower left and upper right corners, which are the oil pressure area; There is a sealing area between the oil absorption area and the oil pressure area to separate them. This type of pump is called a double acting vane pump because each sealed working chamber completes two oil suction and pressure actions for each rotation of the rotor. The two suction zones and two pressure zones of the pump are radially symmetrical, and the hydraulic pressure acting on the rotor is radially balanced, so it is also called a balanced vane pump.

The instantaneous flow rate of a double acting blade pump is pulsating, and the pulsation rate is small when the number of blades is a multiple of 4. For this reason, the number of blades in a double acting vane pump is generally set to 12 or 16.

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Rexroth Rexroth pump PV7-1X/10-14RE01MC0-16