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1. Description

Applicable models XCMG:

QY25K5C_2 QY70KC QY50KC QY25K5D_2 QY25KC XCT35_BR QY25K5D_3 QY25K5D_3 QY25K5C_1 QY55KC_1 QY25K5F_1 QY50KC QY50K5C_1 QY25K5C_2 QY25K5F QY25K5C QY25K5D_2 QY30KC QY55K5C_2 QY25K5F_1 QY25K5D_1 QY30KC QY55K5D

XCT80L6 XCT130_1 XCT12 XCT80L6 XCT25L4_S XCA40_M XCA30_JY XCT25L5_3 XCT55L5 XCT110_1 XCT60L6 XCT12 XCT25L5_SR XCT25L5_2 XCT95L7 XCT75L7 QY110K8C QY95K7C QY110K7C XCT100 XCT75_S QY40KC XCT90 XCT25 XCT25L5_E QY70KC QY40K5C_2 XCT60L6_1 QY75KC QY100K7C QY95KH QY100K6C QY50JW XCT16_1 XCT100_BR XCT60 QY20K5D QY85KC XCT25 XCT80L5 XCT100 XCT20L5_1 XCT75L6 XCT20L5 XCT80_S XPD36 QY16KC QY16KC QY40K5D_1 QY25K5L XCA40 QY40KD QY80K5D QY70K5D_1 QY50KD QY20K5C XCT50_Y XCT16_Y XCT25L4_Y XCT80_Y XCT60_Y XCT50_Y and other XCT QY RT series models

2. Product introduction

The hydraulic lock is essentially composed of two hydraulically controlled check valves.

Hydraulic lock, as the name implies, is a “lock”, which locks the circuit to prevent the flow of oil in the circuit, as shown in the figure, to ensure that the oil cylinder in the figure can keep its position static even if there is a certain external load. move.

The specific structure of the hydraulic control check valve is a check valve with a hydraulic control port. There are valve seats, steel balls, springs, hydraulic ports, control plungers, and three oil ports A, B, and X.

In the A-B direction, the hydraulic oil overcomes the spring force, pushes the steel ball away, and flows directly through it. In the B-A direction, the steel ball falls on the valve seat, and the oil cannot flow through. It is necessary to connect the control oil with pressure at the X port. The control oil acts on the control plunger to push the plunger forward. The plunger is connected to the push rod and pushes the The rod pushes open the steel ball so that the hydraulic oil can flow “in reverse”.

The part framed by the dotted line in the figure is the hydraulic lock

The function of the hydraulic lock is to interlock, and when the spool valve is in the neutral position in the figure, the left and right oil cylinders of the hydraulic cylinder are in a static state under the action of the two check valves; but when the spool valve is in the right position, and the b port enters the oil , at this time, the right one-way valve enters the oil, and at the same time controls the oil circuit to open the left one-way valve to drain the oil; the same is true when the slide valve is in the left function.

3. Strength

XCMG Construction Machinery Co., Ltd. (abbreviation: XCMG Co., Ltd.) is an important member enterprise with the core business and the longest history of Xuzhou Construction Machinery Group Co., Ltd. (abbreviation: XCMG). It is a large-scale, product variety and series in my country’s construction machinery industry. It is a 100 billion-level leading enterprise with complete, highly competitive, influential and national strategic position. At present, it ranks first in the domestic industry, third in the global industry, fourth in China’s top 100 machinery industries, and 395th in the world’s top 500 brands. It is a resounding business card for China’s equipment manufacturing industry.

XCMG all-terrain cranes have profound technical accumulation and continue to lead the global crane technology revolution. The leading XC A1200 all-terrain crane is the eight-axle 1200-ton all-terrain crane with the highest lifting performance in the industry, and the world’s first self-folding special boom for wind power.

The market share of XCMG truck cranes is nearly 60% in the country. XCMG’s unique mature key technology improves performance in all directions and creates excellent value for customers. The arm length is fully covered, the power is stronger, the efficiency is more prominent, the operation is more stable, the economy is more prominent, and the system is more reliable.