Five kinds of common failures of cement concrete paver

Cement concrete paver may appear the following several kinds of common faults in work:

1. Cement concrete paver spiral distributor of failure

Spiral distributor in use process, if appear the phenomenon of oil pressure is too high, do not turn, the reason may come from four aspects.

(1) on both ends of the spiral distributor bearing damage. Is usually caused by a bearing oil seal and dusty outside damage. Get inside concrete mortar in spiral distributor jammed or resistance is too large, serious when the bearing damage. At this time only need to replace bearing, oil seal and dusty, infuse the new lubricating oil.

(2) the chain is too long. When the chain was stretched to a certain extent, the chain will be chain tooth box shell card to death, should change new and infuse lubricating oil at this time.

(3) the damage of planetary gear reducer. Will spiral distributor and chain gear box cover removed, turn the drive sprocket, if cannot turn, only need to remove the driving wheel planetary reducer damage was observed. Damage reason is due to individual gear, gear ring processing poor quality, need to change the assembly.

(4) hydraulic pump, hydraulic motor fault. If damage of hydraulic pump, hydraulic table somewhat low indicating value; If damage of hydraulic motor, hydraulic table indicating value is low, no action on one side and damage. The above case assembly are to be replaced.

2. Cement concrete paver vibrating system failure

(1) vibration rods

Show the machine in the vibration at the time of the light is good, but after 10 min or longer vibrating stick - stop vibration. Possible reason is bearing jammed; The motor driven gear bearing jammed; The motor driven gear shaft connection fork rupture; Connected to the motor and shaft of eccentric connection wire shaft fracture.

Elimination method is to check whether the motor shell is damaged, if not, can change gears, sealing ring, remounted wire shaft, and replace all of the bearing fault can be ruled out.

(2) lack of vibrating rod vibration

The work frequency of the vibrating rod is usually 6 ~ 11 000 000 r/min. In construction process, sometimes a vibrating rod vibration is weak, and even adjusting knob FM also of no help, then a vibrating rod should be replaced. Method is to unscrew the damaged vibrating rod centrifugal machine shell, take out a centrifuge, and check the centrifuge at the ends of the bearing, vibration motor output shaft bearings and seals, update and refitted.

This problem is usually caused by bearing failed to timely filling grease, should be replaced according to the service life of the grease in a timely manner; For vibrating rod vibration weakness, should check as early as possible, maintenance, so that can protect the vibration motor from being damaged. Meet don't increase the vibration frequency, vibrating unable to do that will accelerate the damage of the vibrating rod.

3. Cement concrete paver hydraulic system failure

Main show is: side templates, virtual control panel and vibrating rod beam hydraulic cylinder ascension does not reach the designated position or cannot ascend. The main reason is the electromagnetic valve does not work or joystick circuit fault; Pump out the oil pressure is not normal, the oil metamorphism; The overflow valve is damaged; The hydraulic cylinder oil or tubing damage. If the hydraulic cylinder has been bad, should check the piston and cylinder block and oil seal and repair. Oil resistance is the reason may be the piston rod was residual concrete block card to death, at this time should immediately clean up, and apply a small amount of grease in hydraulic pressure crock mouth place, and let the piston rod to move several times, to make it back to normal work.

General performance of hydraulic system fault for: vibrating rod vibration frequency, vibration drop, the oil temperature rise, noise increase, etc. When the first volume of oil system should be considered enough. If after lubrication system works well, but after a while repeat appear afore-mentioned symptoms, is may be caused by leakage oil in the hydraulic system is serious, must make a comprehensive inspection. In drainage system is likely to be out in the main electromagnetic valve and pump, therefore, can first check the electromagnetic directional valve and other components within the system and line, check the main pump again.

To preliminarily determine whether the leakage due to primary pump wear, need to more carefully to check the purity of the hydraulic tank at the bottom of the hydraulic oil or view the presence of metal particles. When general main pump leakage, can see the tiny metal powder crumbs in the hydraulic oil, this is because the main pump oil shortage in the state of friction pair work under high temperature, make the two main friction pair (with flow plate and piston cylinder, piston sliding boots and swash plate) components between the wear and tear, damage, resulting in a serious drain, can not meet needs pressure. At this point need to replace the new pump assembly, hydraulic oil, and cleaning oil filter and piping, the fault can be ruled out.

4. Cement concrete paver automatic leveling system failure

Due to the large hanging line slope down more, or the fuselage height difference before and after the value (generally occurs after the start of a range), make the paver automatically rises occur one leg. When the leg last up to the highest position, automatic leveling hydraulic sensor will not work. At this time, the automatic leveling button, should be closed by manual manipulation button will rise leg down, check line height. If the height difference before and after more than standards, the height of the need to adjust the sensor value.

5. Cement concrete paver screeding device failure

When screeding device failure, should first stop check screeding device of mechanical drive part, view the transverse or longitudinal mobile chain, sprocket is damaged, broken, get stuck. If there is no failure, this part may be due to screeding device of the hydraulic system failure.