2-70
Accelerating operation
When VA and VB ports are connected respectively to pump and tank by operating the control
valve, hydraulic oil from pump is forwarded through VA port to push open the check valve
provided inside spool (31), and oil flows to motor via MA port to rotate the motor.
Therefore, the pressure increases and negative brake is released by the pressure supplied from
pump. At the same time, the pressure of pilot chamber increases to push and move the spool
(31) leftwards, overcoming the spring (33) force. Thus, the return line from MB to VB opens to
rotate the motor.
In case inertia load is too big to start rotation, accelerating pressure reaches the set pressure of
relief valve and high pressure oil is being relieved while the motor gains the rotational speed.
As the rotational speed goes up, the relieved volume decreases, and finally the motor rotates at
a fixed speed.
②
VB
VA
MB
MA
MB
MA
MB
MA
DR
VB
VA
DR
125LCR2TM30
Содержание HX130 LCR
Страница 11: ...1 1 SECTION 1 GENERAL Group 1 Safety Hints 1 1 Group 2 Specifications 1 10 ...
Страница 174: ...4 5 MEMORANDUM HYUNDAI HEAVY INDUSTRIES CO LTD CONSTRUCTION EQUIPMENT DIV ...
Страница 218: ...4 49 4 49 No of pin Receptacle connector female Plug connector male 14 1 7 6 14 MG610406 KET SDL CONNECTOR 13 ...
Страница 517: ...8 89 Insert O rings to the relief valve 30 and reassemble them to rear cover 20 This completes assembly 17 32038SM42 ...
Страница 536: ...8 108 125LCR8TM30 Turn casing 1 upside down and remove oil seal 3 using jig 29 ...
Страница 545: ...8 117 125LCR8TM61 After assembling spring 44 in order clamp plug 41 Tightening torque 5 5 0 5 kgf m 39 8 3 6 lbf ft 31 ...
Страница 566: ...8 138 Remove lock nut 22 and then boot 23 14 36078RL14 2507ARL10 ...
Страница 577: ...8 149 14 15 3 Install cover 3 to body 1 and tighten bolts 14 Torque 10 12 5 kgf m 72 3 90 4 lbf ft 7 21078DA10 ...
Страница 609: ...8 181 1 STRUCTURE GROUP 11 WORK EQUIPMENT SECTION C SECTION B SECTION A 130ZF8DA44 SECTION A SECTION B SECTION C ...