Open-type heavy hydraulic motor

Abstract

The invention discloses an open-type heavy hydraulic motor which comprises a bracket, a spin valve and a crank shaft arranged at the center of the bracket, wherein one end of the crank shaft is connected with the outer end part of a valve core; more than four uniformly distributed double-acting oil cylinders are arranged around the eccentric section of the crank shaft; the bottom of each double-acting oil cylinder is hinged with the bracket, and the piston rod of each double-acting oil cylinder is connected with the eccentric section of the crank shaft through a rotatable connection structure; a valve body is provided with an oil inlet, an oil outlet and working oil ports of which the number is corresponding to that of the oil cylinders; all the working oil ports are uniformly distributed on the circumference of the valve body; the circumference of the valve core is provided with two annular grooves and two sectorial oil grooves; the corresponding central angles of the two sectorial oil grooves are greater than 90 degrees and less than 180 degrees; the two sectorial oil grooves are respectively connected with the corresponding annular grooves through connecting oil ways; and each working oil port is connected with the rod cavity oil port and rodless cavity oil port of each double-acting oil cylinder according to the corresponding relations. According to the invention, an extra-large torque can be easily realized, and the output torque and rotation speed are more uniform; and the open-type heavy hydraulic motor is convenient to install and maintain and has a wider application range.

Description

technical field [0001] The invention relates to a hydraulic motor. Background technique [0002] Low-speed and high-torque rotating devices are widely used in various mechanical equipment, such as large winches, vertical mills, mixers, etc. Most of the rotating devices currently used are mechanical transmission structures or hydraulic motor transmission structures. The gear is used to drive the rotating device, not only the structure is more complex, the energy loss is greater, but also it is difficult to meet the working conditions of outputting super high power and super high torque, because after reaching a certain order of magnitude, it will be very difficult to increase the power of the motor, and the cost It is very high, and its volume / efficiency is relatively high, which limits the range of use of mechanically driven rotating devices; traditional hydraulic motor devices are all closed structures, and their torque is determined by the flow rate and oil pressure of ...

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Problems solved by technology

[0002] Low-speed and high-torque rotating devices are widely used in various mechanical equipment, such as large winches, vertical mills, mixers, etc. Most of the rotating devices currently used are mechanical transmission structures or hydraulic motor transmission structures. The gear is used to drive the rotating device, not only the structure is more complex, the energy loss is greater, but also it is difficult to meet the working conditions of outputting super high power and super high torque, because after reaching a certain order of magnitude, it will be very difficult to increase the power of the motor, and the cost It is very high, and its volume / efficiency is relatively high, which limits the range of use of mechanically driven rotating devices; traditional hydraulic motor devices are all closed structures, and their torque is determined by the flow rate and oil pressure of the hydraulic motor. After a certain level, it will be very difficult to increase the flow rate and flow rate, and there is no advantage in outputting large torque or super torque, it is extremely difficult to achieve, and it is not easy to install and maintain, and its use cost is relatively high.

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