CN111879519A - Early warning device and early warning detection method for breakage of electric wheel rack - Google Patents

Abstract

The invention discloses an early warning device and an early warning detection method for the breakage of a motor wheel frame, belonging to the field of auxiliary devices of the motor wheel frame. It includes: a trigger layer installed on the inner wall of the gear box, the trigger layer is matched with the gear teeth on the inner gear of the gear box, the trigger layer includes a first trigger layer, and the first trigger layer is made of a solid compound that can make the lubricating oil alkaline When the electric wheel frame is destructively deformed, the gear deflects in the direction of the trigger layer, and grinds with the surface of the first trigger layer. After grinding, the powder mixed into the lubricating oil changes the PH value of the lubricating oil. The detection method includes: regularly sampling and testing the PH value of the lubricating oil in the gear box. The invention utilizes an early warning device arranged between the inner wall of the gear box and the gear, and monitors the fracture condition of the electric wheel frame by detecting the change of the PH value of the lubricating oil.

Description

A kind of early warning device and early warning detection method of electric wheel frame breakage

Technical field:

The invention belongs to the technical field of electric wheel frame auxiliary devices, and in particular relates to an early warning device and an early warning detection method for the breakage of an electric wheel frame.

Background technique:

Dump truck is one of the construction machinery and equipment, and it often needs to cooperate with construction machinery such as excavators, loaders, belt conveyors, etc. in open-pit coal mine projects. Since the road conditions around the coal mine are usually poor, the dump truck needs to drive in bumpy road conditions for a long time, and the electric wheel frame is always in a state of shock load as a load-bearing structural member. Although the design load of the electric wheel frame should theoretically take into account the impact load of the bumpy working conditions, due to the actual road conditions of the open-pit coal mine, it may often be worse than the ideal situation, thereby greatly increasing the impact load on the frame. As a result, a considerable part of the electric wheel frame is destructively deformed or even broken.

As a system that provides traction for mining dump trucks, the electric wheel frame not only connects the body, rims and tires, but also transmits the traction force and reaction force generated by the tires, and directly bears the internal and external loads of the electric wheel. The gear system is installed in the frame and is relatively fixed with the frame, and the gear box is installed on the outer side of the frame and the gear and fixed on the vehicle body. Since the outside of the motor wheel frame after loading is surrounded by other components, the general routine inspection cannot find cracks generated on the frame. Existing inspection methods can only find motorized wheels where the frame has broken, but cannot predict the break or measure the degree of damage.

Invention content:

The present invention provides an early warning device and an early warning detection method for the breakage of the motor wheel frame in order to solve the defect that the existing detection method cannot timely provide an early warning prompt for the damage degree of the motor wheel frame. The early warning device is installed, and the damage degree of the electric wheel can be judged without dismantling the external components of the electric wheel by using the conventional inspection procedures of the electric wheel.

The technical solution adopted in the present invention is: an early warning device for the breakage of an electric wheel frame, comprising: a trigger layer installed on the inner wall of the gear box, the trigger layer is in clearance fit with the gear teeth located on the inner gear of the gear box, the The trigger layer includes a first trigger layer, and the first trigger layer is composed of a solid compound that can make the lubricating oil alkaline. When the electric wheel frame is destructively deformed, the gear is deflected in the direction of the trigger layer, and is connected with the first trigger layer. The surface of the trigger layer is ground, and the PH value of the lubricating oil is changed by the powder mixed into the lubricating oil after grinding.

Preferably, the gap is greater than 3.2 mm.

Preferably, the first trigger layer is block calcium carbonate.

Preferably, the trigger layer further includes a second trigger layer, the second trigger layer is located between the inner wall of the gear box and the first trigger layer, and the second trigger layer is composed of a solid compound that can make the lubricating oil acidic .

Preferably, the second trigger layer is bulk silicon dioxide.

Preferably, the trigger layer further includes a third trigger layer, the third trigger layer is located between the inner wall of the gear box and the second trigger layer, and the third trigger layer is made of a solid compound that can make the lubricating oil alkaline composition.

Preferably, the third trigger layer is block calcium carbonate.

Preferably, the trigger layer is mounted on the inner wall of the gearbox through a bracket.

A method for early warning detection of electric wheel frame breakage, which specifically includes the following detection steps:

Step 1: Carry out the first sampling test for the PH value of the lubricating oil in the gear box. Since the PH value of the normal lubricating oil is its own weak acid value, it means that the electric turbine frame is in normal use; if the PH value of the lubricating oil is weak alkali It means that the motor wheel frame has undergone slight destructive deformation, that is, the first trigger layer has been destroyed;

Step 2: After the first routine sampling test, carry out the second sampling test on the PH value of the lubricating oil in the gear box. If the PH value of the lubricating oil is weakly alkaline, it means that the electric turbine frame is still in slight destructive deformation stage; if the PH value of the lubricating oil is weakly acidic, and the acidic PH value is greater than the acidic PH value of the lubricating oil itself, it means that the degree of destructive deformation of the electric turbine frame is further aggravated, that is, the second trigger layer has been destroyed;

Step 3: After the second routine sampling test, carry out the third sampling test on the PH value of the lubricating oil in the gear box. If the PH value of the lubricating oil is still acidic, it means that the degree of destructive deformation of the electric turbine frame is not. It is further aggravated; if the PH value of the lubricating oil is weakly alkaline again, it means that the motor wheel frame has suffered severe fracture deformation, that is, the third trigger layer has been destroyed.

Preferably, the interval between each routine sampling assay is at least 250 hours.

The beneficial effects of the present invention are:

1. In the present invention, when the electric wheel frame is deformed, the gap between the inner wall of the gear and the gearbox will be reduced, and even the phenomenon of mutual interference will occur. An early warning device is set between the inner wall of the gearbox and the gear, and the lubricating oil is regularly inspected by a dump truck. It can monitor the breakage of the electric wheel frame by detecting the change of the PH value of the lubricating oil, so as to realize the early warning effect on the damage of the electric wheel frame in different degrees.

2. The present invention can realize periodic early warning prompts by setting up multi-level trigger layers, and can realize early warning effect through routine detection of lubricating oil. Compared with the early warning device in the existing sensor mode, the present invention has a simple structure, and does not need to be adjusted. The existing components are modified, the detection method is simple, the monitoring cost is low, and the practicability is strong.

Description of drawings:

Fig. 1 is the structural representation of the present invention;

Fig. 2 is an enlarged view at A in Fig. 1;

Fig. 3 is the structural representation of trigger layer;

Figure 4 is a state diagram of the gear and the trigger layer at different deformation stages of the motor wheel frame;

Fig. 5 is an enlarged view at B in Fig. 4;

Among them: 1 motor wheel frame, 2 trigger layer, 3 gear, 4 gear box, 5 first trigger layer, 6 second trigger layer, 7 third trigger layer, 8 bracket.

Detailed ways:

Example 1

As shown in FIGS. 1 to 3 , the present invention is an early warning device for the breakage of an electric wheel frame, comprising: a trigger layer 2 installed on the inner wall of the gear box 4 , the trigger layer 2 and the gear 3 located in the gear box 4 . There is a clearance fit between the gear teeth on the top, and for dump trucks of different specifications, the clearance between the trigger layer 2 and the gear 3 is different, and the clearance is greater than 3.2mm.

A groove for mounting the trigger layer 2 is machined on the inner wall of the gear box 4 , and the trigger layer 2 is mounted on the inner wall of the gear box 4 through the bracket 8 . The trigger layer 2 can also be fixed on the inner wall of the gear box 4 by other means such as pasting, welding, or the like.

The triggering layer 2 includes a first triggering layer 5, and the first triggering layer 5 is composed of a solid compound that can make the lubricating oil alkaline, for example, the first triggering layer 5 is a block-shaped calcium carbonate.

Under normal design conditions, the motor wheel frame 1 is always in a state of elastic deformation, and should not be destructively deformed. The gear 3 installed in the motor wheel frame 1 also rotates with the deflection of the motor wheel frame 1. The gear 3 and the gear box 4 fixed on the dump truck have always maintained a reasonable clearance without any interference, such as the position indicated by O in Figure 5.

As shown in Figure 4, the position F in the figure is where the electric wheel frame 1 breaks. The dump truck runs under severe working conditions for a long time. When the electric wheel frame 1 undergoes slight destructive plastic deformation (ie deformation In the first stage, as indicated by the dotted line C in Fig. 5), the deflection of the motor wheel frame 1 increases. Since the degree of destructive deformation produced by the motor wheel frame 1 is small, it is installed in the motor wheel frame 1. The deflection angle of the gear 3 also increases at the same time, so that the gear 3 gradually approaches the direction of the inner wall of the gear box 4 , that is, the gear 3 is deflected in the direction of the trigger layer 2 .

Since the gear 3 keeps rotating at high speed during the working process, the trigger layer 2 installed inside the gear box 4 is triggered at this time. When the gear 3 touches the surface of the first trigger layer 5, it is ground and the ground powder is mixed into the lubricating oil. Inside. During the routine inspection procedure for lubricating oil, since normal lubricating oil is weakly acidic, and the first trigger layer 5 is a solid compound that can make the lubricating oil alkaline, therefore, when the electric wheel frame 1 is in the first stage of deformation , when the first trigger layer 5 is triggered, the PH value of the lubricating oil changes, and the pH test result will be weakly alkaline. Therefore, when the lubricating oil is inspected, if the alkalinity is detected, it means that the electric wheel frame 1 is already in the first stage of deformation.

Example 2

Embodiment 2 On the basis of Embodiment 1, the trigger layer 2 further includes a second trigger layer 6 .

The second trigger layer 6 is installed on the bracket 8 and is located between the inner wall of the gear box 4 and the first trigger layer 5. The second trigger layer 6 is composed of a solid compound that can make the lubricating oil acidic, such as the first trigger layer. The second trigger layer 6 is bulk silicon dioxide.

Since the second trigger layer 6 is a solid compound that can make the lubricating oil acidic, when the motor wheel frame 1 is in severe destructive plastic deformation (ie, the second stage of deformation, as indicated by the dotted line D in FIG. 5 ) , the second trigger layer 6 is triggered, so that the PH value of the lubricating oil changes again.

Example 3

Embodiment 3 On the basis of Embodiment 2, the trigger layer 5 further includes a third trigger layer 7 .

The third triggering layer 7 is mounted on the bracket 8 and is located between the inner wall of the gear box 4 and the second triggering layer 6, and the third triggering layer 7 is composed of a solid compound that can make the lubricating oil alkaline, such as The third trigger layer 7 is block calcium carbonate.

Since the third trigger layer 7 is a solid compound that can make the lubricating oil acidic, when the motor wheel frame 1 is in severe fracture deformation (ie, the third stage of deformation, as indicated by the dotted line E in FIG. 5 ), the first The three trigger layers 6 are triggered, so that the PH value of the lubricating oil changes again.

Example 4

An early-warning detection method for the breakage of an electric wheel frame, using the early-warning device described in Embodiment 3, specifically includes the following detection steps:

Step 1: Carry out the first sampling test on the PH value of the lubricating oil in the gearbox 4. Since the PH value of the normal lubricating oil is weakly acidic, if the PH value after the detection is its own PH value, it means that the electric turbine frame 1 The use state is normal; if the PH value of the lubricating oil is weakly alkaline, it means that the electric wheel frame 1 has undergone slight destructive deformation, that is, it is in the first stage of deformation, and the first trigger layer 5 has been destroyed.

Step 2: After a period of time between the first sampling and testing, conduct a second sampling and testing of the PH value of the lubricating oil in the gear box 4. If the PH value of the lubricating oil is weakly alkaline, it means that the electric turbine frame 1 is still in the The first stage of deformation; if the PH value of the lubricating oil is weakly acidic again, and the acidic PH value is greater than the acidic PH value of the lubricating oil itself, it means that the degree of destructive deformation generated by the electric wheel frame 1 is further aggravated, that is, it is in the second deformation stage. stage, the second trigger layer 6 has been destroyed.

Step 3: After a period of time between the second sampling and testing, the PH value of the lubricating oil in the gear box 4 is again sampled for the third time. If the PH value of the lubricating oil is still acidic, it means that the The degree of destructive deformation has not been further increased, and it is still in the second stage of deformation; if the PH value of the lubricating oil is weakly alkaline again, it means that the motor wheel frame 1 has suffered severe fracture deformation, that is, it is in the third stage of deformation, and the third stage is the third stage of deformation. The trigger layer 7 has been destroyed, and there is a serious security risk.

Further, the interval between each routine sampling and testing is at least 250 hours. If the dump truck encounters a sudden abnormal situation during the driving process, a temporary sampling test can be carried out.

The above are only preferred specific embodiments of the present invention, and these specific embodiments are based on different implementations under the overall concept of the present invention, and the protection scope of the present invention is not limited to this. Anyone familiar with the technical field Changes or substitutions that can be easily conceived by a skilled person within the technical scope disclosed by the present invention shall be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (10)

1. The utility model provides a cracked early warning device of electronic round of frame which characterized in that includes: install trigger layer (2) on gear box (4) inner wall, trigger layer (2) with be located the teeth of a cogwheel clearance fit on gear box (4) internal gear (3), trigger layer (2) including first trigger layer (5), first trigger layer (5) are by enabling lubricating oil to be alkaline solid compound and constitute, when destructive deformation takes place for electronic round of frame (1), gear (3) take place to deflect to trigger layer (2) direction to produce with first trigger layer (5) surface and grind, mix the powder in the lubricating oil after grinding, thereby change the pH value of lubricating oil.

2. The warning device for breakage of a motorized wheel carrier as claimed in claim 1, wherein: the gap is greater than 3.2 mm.

3. The apparatus for warning the breakage of a motorized wheel carrier of claim 2, further comprising: the first trigger layer (5) is massive calcium carbonate.

4. A warning device of breakage of an electric wheel frame as claimed in any one of claims 1 to 3, wherein: the trigger layer (2) further comprises a second trigger layer (6), the second trigger layer (6) is located between the inner wall of the gear box (4) and the first trigger layer (5), and the second trigger layer (6) is composed of solid compounds capable of enabling lubricating oil to be acidic.

5. The warning device for breakage of electric wheel carrier according to claim 4, wherein: the second trigger layer (6) is bulk silicon dioxide.

6. The warning device for breakage of electric wheel carrier according to claim 4, wherein: the trigger layer (5) further comprises a third trigger layer (7), the third trigger layer (7) is located between the inner wall of the gear box (4) and the second trigger layer (6), and the third trigger layer (7) is composed of a solid compound capable of enabling lubricating oil to be alkaline.

7. The warning device for breakage of electric wheel carrier according to claim 6, wherein: the third trigger layer (7) is massive calcium carbonate.

8. The warning device for breakage of a motorized wheel carrier as claimed in claim 1, wherein: the trigger layer (2) is arranged on the inner wall of the gear box (4) through a bracket (8).

9. The early warning detection method for breakage of the electric wheel frame is characterized by comprising the following detection steps of:

step 1: sampling and testing the pH value of the lubricating oil in the gear box (4) for the first time, and if the pH value of the lubricating oil is a weak acid value, indicating that the electric wheel frame (1) is in a normal use state; if the pH value of the lubricating oil is alkalescent, the electric wheel frame (1) generates slight destructive deformation, namely the first trigger layer (5) is destroyed;

step 2: after the first conventional sampling and testing, performing second sampling and testing on the pH value of the lubricating oil in the gear box (4), and if the pH value of the lubricating oil is alkalescent, indicating that the electric wheel frame (1) is still in a slight destructive deformation stage; if the pH value of the lubricating oil is weakly acidic and the acidic pH value is greater than the acidic pH value of the lubricating oil, the destructive deformation degree generated by the electric wheel frame (1) is further increased, namely the second trigger layer (6) is destroyed;

and step 3: after the second conventional sampling test, performing a third sampling test on the pH value of the lubricating oil in the gear box (4), and if the pH value of the lubricating oil is still acidic, indicating that the destructive deformation degree generated by the electric wheel frame (1) is not further increased; if the pH value of the lubricating oil is weakly alkaline again, the electric wheel frame (1) generates serious fracture deformation, namely the third triggering layer (7) is damaged.

10. The method for early warning and detecting breakage of the electric wheel frame as claimed in claim 9, wherein: the test interval is at least 250 hours for each routine sampling.

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