Since the advent of hydraulic hammer 60 years since the technology is improving. Compared with the air hammer, hydraulic hammer with the noise, broken good performance, energy utilization, and high body compact and so on. It can be directly installed in the universal self-propelled hydraulic machinery, non-Xu-owned power plant, to help in the demolition of old buildings and broken pavement, ore and other areas of applied more widely.
Hydraulic excavator hammer to install up to host. With the increase in demolition and crushing operations, excavators equipped with hydraulic hammers, to achieve a multi-purpose machine needs more and more.
A hydraulic excavator hammer and a reasonable match
Hydraulic excavator hammer and a reasonable match, can give better play to the efficiency of hydraulic hammer to ensure that the service life of hydraulic hammers and excavators. Under normal circumstances, primarily from the work of the weight of the host, the installation of hydraulic hammer spare output flow and pressure valves, etc. shall be considered.
1.1 Hydraulic hammer and excavator working device match the weight and
Through the following relationship can quickly determine whether the hydraulic hammer and excavator match (see Figure 1):
Where R --- the largest broken radius, S ---- Track excavator half, Wb ---- the weight of hydraulic hammer work, We --- excavator weight, if the ratio is less than the calculated 0.3, indicating a small selection of hydraulic hammers, and will lead to damage to hydraulic hammer soon; if the ratio is greater than 0.5, indicating a large selection of hydraulic hammers.
Also, taking into account the hydraulic hammer and work connected device pin and the pin hole with the clearance between the suitability of the radial axis.
1.2 The working flow, pressure match
And other hydraulic components like hydraulic hammer has its own requirements for each flow range of the rated working pressure, the selected hydraulic hammer forward, we must let the flow of hydraulic hammer excavator reserve requirements and the output flow line valve. In general, the flow rate determine the size of the working efficiency hydraulic hammer, namely, the impact of a few per minute, flow is proportional to the number and impact, but the traffic flow is greater than the needs of hydraulic hammer, it will make hydraulic system to produce excessive heat, causing the system temperature is too high, reducing component life.
In the optional hydraulic hammer into, but also test the work pressure of hydraulic hammer with the back pressure valve limit line. If not match, should be back within the framework of the adjustment valve hydraulic hammer according to the rated pressure to adjust.
2 Installation
Since most of the excavator in the factory did not set up the pipeline Hydraulic hammer attachment, only with a spare valve, so when they install the hydraulic excavator hammer time, it is necessary self-made piping and accessories. Figure 2 is a diagram of the major components, piping connections. Back to the oil pressure is too high will reduce the impact of hydraulic hammer, hydraulic hammer in order to minimize the fuel back pressure, allows a total return pipe pass oil filter directly back to tank (no longer stand by the valves). To facilitate the change bucket to carry out mining operations near the hydraulic hammer piping should be equipped with a cut-off valve. Installation of pipelines should be to prevent dirt intrusion systems, pipe and fittings to go through decontamination at the amount of hose shall not be reversed.
If the valve is not equipped with standby control asphalt. Pilot control system from the oil pipeline (in the safety lock valve after) plus the first three links, Sharp leads to pressure on oil, and then back through the solenoid valve control valve. Solenoid valve should adopt to facilitate manipulation of switch control.
3 Use
3.1 proper operation
Proper operation can improve the operating efficiency hydraulic hammer, and extend the service life of excavators hydraulic hammer. Job, with particular attention to the following points.
(1) hydraulic hammer drill rod is always being broken vertical surface, use solder pressed forward to being broken objects. Immediately after the cessation of hydraulic breaking hammer, to prevent air play.
(2) When the broken hard objects in particular, should start with the edge began to beat, do not continuously hammering the same point after one minute, to prevent the drill rods burning or hydraulic oil overheating.
(3) The rotary excavator, do not let Rod run into other objects.
(4) when operating in water, only to drill rod immersed in water, If you really need all the submerged hydraulic hammer operation, should be ordered manufacturers dedicated underwater hydraulic hammer.
3.2 Maintenance
As the hydraulic hammer is very poor working conditions, proper maintenance of stay reduction in the incidence of mechanical failure and extend the life of the machine. In addition to the regular maintenance of excavators, we must also note the following points.
(1) visual inspection checks Rod with Bushing gap and see whether there is hydraulic oil leaking during. If the oil leakage, indicating low-pressure seal oil seepage has been damaged, should be invited to replace professional. Check whether the relevant bolts loose, whether the service connections of the pin into the amount of wear and tear.
(2) lubrication points, lubrication working device plus at least twice a day grease.
(3) the replacement of filters and hydraulic oil when the use of hydraulic hammers, hydraulic oil deterioration and contamination during operation than an ordinary bucket much faster. Under normal circumstances, should be half the normal replacement cycle to replace the hydraulic system and hydraulic oil filter element oil filter.