Constant-pressure variable radial-plunger pump

Abstract

The present invention relates to one kind of constant pressure and variable displacement radial plunger pump, which has an elliptic pump shell; a stator sliding inside the shell and slide fitting to the back ring; a rotor on the flow distributing shaft and with plungers inside radial plunger holes and link rods inside the plungers; a driving shaft connected through coupling to the rotor; a flow distributing shaft with four blind holes; a large and a small control plungers pushing the stator through sliding blocks; a hand driven constant pressure and variable displacement valve to regulate oil pressure with an inner valve core to control the large control plunger and a screw bolt to control the small control plunger so as to control the eccentric distance between the stator and the rotor and determine the oil displacement. Rotating the rotor by one cycle completes once oil sucking and oil discharging. The present invention has simple structure, small size, low noise and other advantages.

Description

technical field [0001] The invention belongs to hydraulic transmission power components, in particular to a constant pressure variable radial plunger pump with high speed, low noise, long service life and simple structure. Background technique [0002] As we all know, at present, with the rapid development of modern industrial technology, the requirements for the hydraulic industry are getting higher and higher. Long service life and electromechanical integration, but the traditional axial piston pump has a complex structure and large volume, and it is difficult to achieve the above goals due to the high noise. However, the current domestic radial piston pump uses point contact friction pairs, so the speed is low , short service life, large radial size, low maximum speed and maximum pressure, respectively 1000r / min and 20mpa, and at the same time, the radial force is unbalanced, so it is difficult to promote. If the imported axial piston pump is used, due to its complex str...

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Problems solved by technology

[0002] As we all know, at present, with the rapid development of modern industrial technology, the requirements for the hydraulic industry are getting higher and higher. Long service life and electromechanical integration, but the traditional axial piston pump has a complex structure and large volume, and it is difficult to achieve the above goals due to the high noise. However, the current domestic radial piston pump uses point contact friction pairs, so the speed is low , short service life, large radial size, low maximum speed and maximum pressure, respectively 1000r / min and 20mpa, at the same time, the radial force is unbalanced, so it is difficult to promote

If the imported axial piston pump is used, due to the complex structure and complex variable mechanism, it is difficult to realize variable control, inconvenient to use, poor in reliability, loud in noise, short in service life and high in cost.

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