Rotary motor control system and control method thereof

Abstract

The invention relates to the technical field of engineering machinery, in particular to a rotary motor control system and a control method thereof. The rotary motor control system comprises a rotary motor, a main pump, a pilot pump, an oil tank, a brake piston cylinder, a first reversing valve, a second reversing valve and an electric control handle, wherein the first reversing valve, the second reversing valve and the electric control handle are connected with a controller; the electric control handle is connected with the first reversing valve and the second reversing valve to send control signals to the first reversing valve and the second reversing valve; the main pump is connected with the pilot pump, both the main pump and the pilot pump are connected with the first reversing valve,and the rotary motor is connected with the first reversing valve to supply oil to the rotary motor through the main pump; the second reversing valve is connected with the pilot pump and a rod cavity of the brake piston cylinder so as to supply pilot oil to the rod cavity through the pilot pump and send the pilot oil in the rod cavity into the oil tank; and the brake piston cylinder is connected tothe rotary motor for braking the rotary motor. Through the electronic control technology, the problem that a complex mechanical structure of an existing excavator rotary mechanism caused by braking of the rotary mechanism is solved.

Description

technical field

[0001] The present application relates to the technical field of engineering machinery, in particular to a control system and a control method for a rotary motor. Background technique

[0002] Excavator, as one of the most common construction machinery, has a large volume and mass, and belongs to large moment of inertia mechanical equipment. In order to prevent the excavator from turning on the sloped road due to its own gravity turning and the external wind force and other factors, to ensure its stability during parking and reliability of operation, the braking of the turning mechanism must be considered. However, due to the seal leakage of the hydraulic system, simple hydraulic braking cannot perform long-term reliable limit braking, so mechanical braking must be considered.

[0003] The mechanical brake is completed by a mechanical brake, and its main components are a brake cylinder, a friction plate, a separation plate and a brake spring. The internal s...

Examples

Embodiment Construction

[0048] The technical solutions of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0049] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, use a specif...

technical field

[0001] The present application relates to the technical field of engineering machinery, in particular to a control system and a control method for a rotary motor. Background technique

[0002] Excavator, as one of the most common construction machinery, has a large volume and mass, and belongs to large moment of inertia mechanical equipment. In order to prevent the excavator from turning on the sloped road due to its own gravity turning and the external wind force and other factors, to ensure its stability during parking and reliability of operation, the braking of the turning mechanism must be considered. However, due to the seal leakage of the hydraulic system, simple hydraulic braking cannot perform long-term reliable limit braking, so mechanical braking must be considered.

[0003] The mechanical brake is completed by a mechanical brake, and its main components are a brake cylinder, a friction plate, a separation plate and a brake spring. The internal s...

Examples

Embodiment Construction

[0048] The technical solutions of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0049] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, use a specif...

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