The basic requirements of the engineering machinery overhaul
We can provide free samples . Please contact Email for any inquiries
Technical appraisal before the overhaul 1
At present, engineering machinery overhaul is recovery of its performance, the machine after a longer period of time after the operation, the main part and assembly aging has reached its limit, it should be all the disintegration machine, cleaning, inspection and repair, make its performance reach the factory standard.
Engineering machinery overhaul is needed before the technical appraisal, by the use of units responsible for the technical management, hosting, repair and driving personnel to participate in, before detection, no pressure, temperature and flow rate of the disintegration of the torque performance of each part of the machine, and data review documents and operation record, with assessment of fuel oil and lubricating oil consumption, and make a detailed record. Then the relevant parameters and overhaul of original manufacturer provided by comparison, to determine whether the need to overhaul.
Determination of main technical conditions of construction machinery is in need of overhaul is:
The index of dynamic performance of the engine is decreased more than 20%; the oil consumption of more than 1 times the value of the above quota; cylinder pressure engine reach more than 45 DEG C in temperature measurement is not up to the specified index 60%.
The transmission mechanism of the main parts wear reached their limit, a deflection, abnormal noise, impact and dithering.
The steering mechanism of wear gap is too large, the manipulation of failure; transmission gear and shaft wear serious, difficult shift or often jump block; brake mechanism of serious wear and tear, braking performance degradation or failure, and cannot be adjusted.
The frame body deformation or crack; working device wear serious, disabling; unable to complete the normal workload, or the precision of the operation is not up to the requirements; the walking mechanism of serious wear and tear, is unable the normal work. 2 repair method choice
Engineering machinery into the factory overhaul, grouping, measurement, inspection and identification of the disintegration of the partial response, and the various components of the assembly and engine cylinder, crankshaft etc of abrasion detection, in order to obtain whether replacing basis. General to wear large moving parts need to be replaced; for some inconvenient replacement parts, should adopt the welding process, thermal spraying, brush plating and chrome and restore its original design dimensions. In order to ensure quality, in need of replacement parts should be zero accessories to buy the original manufacturer or designated collaboration factory in accordance with the requirements of the.
Repair method is divided into: car repair and replace the assembly repair. Vehicle repair method, is in the repair process will be removed from the machine parts in turn, after cleaning, detection, classification and repair or replace, and re assembly, in order to achieve the method of repair recovery performance. Vehicle repair method occupy downtime longer repair time.
Around this issue, different scholars have conducted a lot of research from different angles, and put forward a lot of dynamic seal theory, the following introduces several typical theory of hydraulic reciprocating seal.