Variable pump variable control device and variable pump variable control method thereof

Abstract

The invention provides a variable pump variable control device which can realize controlling variable speed and a variable direction of a variable pump, is suitable for mechanical equipment which is frequently in a standby state, and solves the problem that the service life is affected by quick verifying of the variable pump. The variable pump variable control device comprises the variable pump, an oil tank, a variable cylinder, a pressure valve, a damping hole and a proportional valve, wherein change speed and the size of difference between pressure intensity of liquid in the left cavity of the proportional valve and the right cavity of the proportional valve are controlled by controlling the current change speed and the size of a proportional electromagnet of the proportional valve, so that the change speed and the size of difference between pressure intensity of liquid in the left cavity of the proportional valve and the right cavity of the proportional valve are further controlled,the moving speed and the position of a valve element of the pressure valve are further controlled, the moving speed and the moving direction of the piston of the variable cylinder are further controlled, and variable speed and the variable direction of the variable pump are further realized.

Description

technical field [0001] The invention relates to the field of variable control of variable pumps, in particular to a variable control device for variable pumps and a variable control method for variable pumps. Background technique [0002] Such as figure 2 As shown, this is an existing standby control device for a variable displacement pump, which includes a variable displacement pump 1e, an oil tank 2e, a variable displacement cylinder 3e, a pressure valve 4e, a damping hole 5e, and a solenoid valve 6e. When the mechanical equipment is temporarily shut down, the variable displacement pump 1e maintains a low pressure and small displacement (small displacement refers to the output volume is zero or close to zero, and low pressure refers to the lower pressure that can ensure the lubricating oil film inside the variable pump) standby state, which can To achieve the effect of energy saving, it can also prolong the service life of the pump. For the convenience of explanation, he...

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Problems solved by technology

[0003] There is a problem with this control method: the switching process of solenoid valve power-on and power-off is completed instantly, so the switching of the variable pump to the standby state and the working state is also instantaneous, which means that the variable speed of the variable pump is extremely fast in this control. Fast, too fast variable speed will affect the service life of the variable pump, so this standby control method is not suitable for use in frequent standby mechanical equipment

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