A cleaning vehicle high and low pressure water pump speed control device and cleaning vehicle

Abstract

The invention discloses a speed control device for a high and low pressure water pump of a cleaning vehicle, which comprises an engine, a hydraulic pump, a first hydraulic motor, a second hydraulic motor, a high pressure water pump, a low pressure water pump, and a controller. The hydraulic pump is connected to the engine, and the first hydraulic motor The second hydraulic motor is connected to the hydraulic pump through a pipeline, the high-pressure water pump is connected to the first hydraulic motor, and the low-pressure water pump is connected to the second hydraulic motor; the controller includes an input module, an analysis module, and an output module; the input module obtains the actual speed of the engine; The analysis module is preset with the predetermined speeds of the high-pressure water pump and the low-pressure water pump. The analysis module calculates the predetermined displacement of the hydraulic pump according to the engine speed signal and the predetermined speed of the high-pressure water pump and the low-pressure water pump, and outputs the predetermined displacement of the hydraulic pump to the output module; output The module outputs a variable signal to the hydraulic pump according to the predetermined displacement of the hydraulic pump. The invention also provides a cleaning vehicle. The rotational speed of the high and low pressure water pump of the present invention can be adjusted arbitrarily to control the spraying amount of cleaning water.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a speed control device for high and low pressure water pumps of a cleaning vehicle and a cleaning vehicle. Background technique [0002] At present, there are mainly two types of transmission devices for the high and low pressure water pumps of cleaning vehicles on the market: one is to use two sets of independent high and low pressure waterway drive systems. The power is provided by the power take-off on the upper side. This structure is equipped with an auxiliary engine. The vehicle has high fuel consumption, high emissions, high working noise and high cost of use. [0003] Another way is that both the high-pressure water pump and the low-pressure water pump take power through the chassis engine, drive the one-point three-point transfer case through the pneumatic clutch, the pulley, and then drive the low-pressure water pump through the belt, and drive the high-pressure wat...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention proposes a high and low pressure water pump speed control device for a cleaning vehicle and a cleaning vehicle to solve the problem that the high and low pressure water pump speed cannot be controlled, affected by the engine speed, and the cleaning efficiency is low

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