290243004 DM1345 Hydralic pump 11CM3 in stock for Putzmeister concrete pump truck accessories

Product Description/Features:

Hydraulic pump is a device used to generate and transfer hydraulic energy, usually used in construction machinery, automobiles, ships and other equipment. Hydraulic pump can convert mechanical energy into hydraulic energy, so as to drive the actuator such as hydraulic cylinder and hydraulic motor to complete various tasks.

Common hydraulic pumps include gear pumps, plunger pumps, vane pumps and other types, which have their own advantages and applicability in different working scenarios.

Gear pumps and plunger pumps are common hydraulic pump types, and there are some significant differences in their structure and working principle:

Gear pump:
Structure: The gear pump consists of a pair of meshing gears, usually a drive gear and a driven gear.
Working principle: The liquid enters the pump chamber from the suction inlet, and with the rotation of the gear, the liquid is pushed to the discharge outlet. The liquid is sealed in the pump chamber and pushed out.
Advantages: simple structure, low cost, suitable for small and medium flow, low to medium pressure applications.
Plunger pump:
Structure: The plunger pump generates pressure through the reciprocating movement of the plunger in the cylinder block.
How it works: The plunger changes the volume in the cylinder during reciprocating movement, thus generating hydraulic energy. Plunger pumps typically provide higher pressure and greater flow.
Advantages: Suitable for high flow and high pressure applications, stable output flow and pressure.
The main differences are:

Pressure and flow capacity: Plunger pumps typically provide higher pressure and greater flow for applications requiring high pressure. Gear pumps are usually used for small and medium flow and low to medium pressure occasions.
Structure: The structure of the gear pump is relatively simple, while the structure of the plunger pump is complex and usually requires higher manufacturing accuracy.
Application field: Select the right pump type according to the demand of pressure and flow to meet the requirements of specific applications.

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

External gear pump is the most widely used gear pump, the general gear pump usually refers to the external gear pump. Its structure is shown in Figure 1, which is mainly composed of driving gear, driven gear, pump body, pump cover and safety valve. The seal space composed of the pump body, pump cover and gear is the workshop of the gear pump. The shafts 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 by the motor to rotate. External gear pump has simple structure, light weight, low cost, reliable operation and wide application range.

When the gear pump works, the driving wheel rotates with the motor and drives the driven wheel to rotate. 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 suction liquid is pushed to the discharge chamber by the gear in two ways in the tooth groove. After the liquid enters the discharge chamber, the teeth of the two gears continue to mesh, so that the liquid is squeezed from the discharge chamber into the discharge pipe. The driving gear and driven gear keep rotating, and the pump can 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, so that the high-pressure liquid returns to the suction pipe.

The internal gear pump is composed of a pair of internal gears meshing with each other and a crescent shaped part between them, a pump shell, etc. The function of the crescent is to separate the suction chamber from the discharge chamber. When the driving gear rotates, the local vacuum is formed at the place where the gear is off the mesh, and the liquid is sucked into the pump and filled with the teeth of the suction chamber, and then enters the discharge chamber along the inner and outer sides of the crescent piece in two ways. At the point where the teeth enter engagement, the liquid present between the teeth is squeezed into the discharge tube.

Gear pump in addition to the characteristics of self-priming capacity, flow and discharge pressure independent, pump shell without suction valve and discharge valve, with simple structure, uniform flow, reliable work and other characteristics, but low efficiency, noise and vibration, easy to wear, mainly used to transport non-corrosive, no solid particles and lubrication ability of various oils, 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.

ABOUT COMPANY:

Changsha HuaYi Technology Co., LTD.,

Changsha HuaYi Technology Co., LTD., specialized in the sale of construction machinery parts.
Our company mainly business in various brands of pump trucks, excavators, cranes, wet spray machines and other accessories, as remote controls, Rexroth oil pump, transfer boxes, double pump pipes, lubrication pump, Harvey/Eaton/Parker/Kawasaki valves.
our company specializes in the offline and online trading of used construction vehicles in China, so the concrete pump trucks displayed on the website may have been sold offline.Our database provides a large number of fresh used concrete pump trucks, used excavator used mixer trucks and other construction vehicles, please contact our sales directly to provide you with more accurate services.Thank you for your patience to browse!​​

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