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Bulldozer crawler belt speed control method and device and bulldozer

A technology of crawler speed and control method, which is applied in the direction of earth mover/shovel, mechanically driven excavator/dredger, construction, etc., can solve the problem of decreased operating comfort, decreased reliability of structural parts of the whole machine, and vehicle vibration. big problem

Active Publication Date: 2020-03-24
WEICHAI POWER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] But when the bulldozer enters the anti-stall state, once the track cannot overcome the load and enters the slipping state, it also means that the load suddenly decreases, then the vehicle speed returns to the original set value, and the whole vehicle will immediately enter the slipping state at the set speed , the overall vibration of the vehicle is very large, which brings many problems such as a decrease in operating comfort and a decrease in the reliability of the structural parts of the whole machine.

Method used

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  • Bulldozer crawler belt speed control method and device and bulldozer
  • Bulldozer crawler belt speed control method and device and bulldozer
  • Bulldozer crawler belt speed control method and device and bulldozer

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Embodiment 1

[0036] An embodiment of the present invention provides a method for controlling the speed of a bulldozer track, figure 1 It is a flow chart of a bulldozer crawler speed control method provided in Embodiment 1 of the present invention, refer to figure 1 , the control method includes:

[0037] S10. When the engine speed of the bulldozer is reduced to a first speed threshold, control to reduce the crawler speed of the bulldozer;

[0038] S20, and when the rotational speed of the engine rises to the second rotational speed threshold, control the recovery of the track speed to the set speed;

[0039] Wherein, the first rotational speed threshold is smaller than the second rotational speed threshold.

[0040] Specifically, during the actual operation of the bulldozer, when the load increases, the insufficient engine power will cause the engine speed to drop too fast or even turn off. In order to prevent this phenomenon, it is necessary to appropriately reduce the Track speed, com...

Embodiment 2

[0043] figure 2 It is a flow chart of a bulldozer crawler speed control method provided in Embodiment 2 of the present invention, refer to figure 2 , the bulldozer crawler speed control method includes:

[0044]S110. When the engine speed of the bulldozer decreases to a first speed threshold, control to reduce the speed of the crawler belt of the bulldozer;

[0045] S120. Obtain an updated speed drop threshold by subtracting a preset step value per cycle from the initial speed drop threshold;

[0046] S130, and when the rotational speed of the engine rises to the second rotational speed threshold, control to recover the track speed to the set speed.

[0047] Wherein, the first speed threshold is smaller than the second speed threshold; optionally, the first speed threshold is equal to the difference between the speed setting value and the initial speed drop threshold, and the second speed threshold is equal to the difference between the speed setting value and the updated ...

Embodiment 3

[0056] Figure 4 It is a flow chart of a bulldozer crawler speed control method provided in Embodiment 3 of the present invention, refer to Figure 4 , the bulldozer crawler speed control method includes:

[0057] S210. When the engine speed of the bulldozer is reduced to a first speed threshold, control the crawler speed of the bulldozer to be reduced;

[0058] S220. Obtain an updated speed-drop threshold by subtracting a preset step value from the initial speed-drop threshold in each cycle;

[0059] S230. Obtain the vehicle speed through the vehicle speed radar, and obtain the crawler speed through the crawler rotational speed sensor, and control the crawler speed according to the difference between the vehicle speed and the crawler speed.

[0060] Specifically, the vehicle speed is obtained in real time through the vehicle speed radar, and the track speed is obtained in real time through the track speed sensor, and whether the track speed is within the set range is judged...

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Abstract

The embodiment of the invention discloses a bulldozer crawler belt speed control method and device and a bulldozer, and the control method comprises the following steps: controlling to reduce the crawler belt speed of the bulldozer when the rotating speed of an engine of the bulldozer is reduced to a first rotating speed threshold value; when the rotating speed of the engine rises to a second rotating speed threshold value, controlling the crawler belt speed to be recovered to the set speed, wherein the first rotating speed threshold value is smaller than the second rotating speed threshold value. By distinguishing the rotating speed threshold value for entering the flameout prevention function and the rotating speed threshold value for exiting the flameout prevention function, the problems of high acceleration speed and large vibration during slipping of the whole vehicle are effectively solved, and violent vibration, caused by slipping, of the whole vehicle is relieved.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of speed control, in particular to a method and device for controlling the speed of a bulldozer track and a bulldozer. Background technique [0002] At present, the hydrostatic drive bulldozer has become a mature product in the market. This kind of bulldozer adopts a closed hydraulic system composed of pump motors to drive the single-side crawler respectively and cooperate with each other to realize the walking and steering functions of the bulldozer. When the bulldozer is actually working, it often encounters a sudden increase or decrease in load. When the load increases, the engine power will be insufficient and the engine speed will drop too fast or even turn off. To prevent this phenomenon, it is necessary to Decrease the speed of the vehicle appropriately, that is, reduce the absorbed power of the walking hydraulic system, which we call entering the anti-stall state; when the l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F3/84E02F3/80E02F3/85
CPCE02F3/84E02F3/80
Inventor 许力杰陈岩赵金光于鹏飞
Owner WEICHAI POWER CO LTD
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