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A kind of hydraulic system and test method of outrigger hydraulic cylinder imitation working condition test bench

A technology of hydraulic system and test bench, applied in the field of hydraulic cylinder, can solve the problems of hydraulic cylinder chattering, low control precision, oil leakage, etc., and achieve the effect of precise load application, high control precision and simple principle.

Active Publication Date: 2022-07-29
XCMG HYDRAULICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Outrigger hydraulic cylinders are subjected to side loads during work, which can easily cause various failures such as hydraulic cylinder vibration, rebound, bending of parts, oil leakage, abnormal wear, and fracture, which will bring great losses to the host user.
At present, most of the outrigger hydraulic cylinder test benches are in the factory test stage, and there are very few imitation working condition test benches, and there are shortcomings such as low control accuracy, inaccurate load application, and distortion of test data.

Method used

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  • A kind of hydraulic system and test method of outrigger hydraulic cylinder imitation working condition test bench

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0063] A test method for an outrigger hydraulic cylinder imitation working condition test bench, on the basis of the above-mentioned first embodiment,

[0064] Simulation test of outrigger cylinder supporting process:

[0065] All cylinders are retracted,

[0066] 1. The piston rod of the axial loading cylinder 22 protrudes by the corresponding length, and the rodless cavity pressure of the axial loading cylinder 22 is set: the YA2.4 end of the three-position four-way reversing valve IV21 is energized. Stroke, the piston rod of the axial loading cylinder 22 protrudes by the corresponding length, according to the rated load of the tested cylinder 16, the pressure of the rodless cavity of the axial loading cylinder 22 is set by the relief valve II 10.2;

[0067] 2. The cylinder under test 16 extends out of no-load and contacts with the axial loading cylinder 22, simulating that the truck crane is parked on the ground and the tires of the vehicle are on the ground: the YA2.1 end...

Embodiment 3

[0073] A test method for an outrigger hydraulic cylinder imitation working condition test bench, on the basis of the above-mentioned first embodiment,

[0074] Simulation test of lifting process of outrigger cylinder under side load:

[0075] 1. The axial loading cylinder 22 is fully retracted: the auxiliary motor 20 is powered on to start, the relief valve II 10.2 is powered on, and the YA2.3 end of the three-position four-way reversing valve IV21 is powered on, so that the axial loading cylinder 22 piston is powered on. rod retracts;

[0076] 2. The tested cylinder 16 is extended to contact the axial loading cylinder 22, the rodless chamber of the tested cylinder 16 is pressurized to the rated pressure, and the two chambers are locked. The steps are as follows: the main motor 7 is started, and the three-position four-way reversing valve I12. The YA2.1 terminal of 1 is energized, the cylinder under test 16 is extended, and the relief valve I10.1 is adjusted to pressurize the...

Embodiment 4

[0082] A test method for an outrigger hydraulic cylinder imitation working condition test bench, on the basis of the above-mentioned first embodiment,

[0083] Start pressure characteristic test:

[0084] 1. The tested cylinder 16 is placed flat on the starting pressure test bench without any load;

[0085] 2. Adjust the pressure value of loading pump 19 and relief valve II 10.2 to 0MPa;

[0086] 3. The auxiliary motor 20 is powered on to start, the relief valve II 10.2 is powered on, the YA2.8 terminal of the three-position four-way reversing valve III 12.3 is powered on, and the pressure of the loading pump 19 and the relief valve II 10.2 is gradually adjusted. value, so that the system pressure gradually increases from 0MPa until the cylinder under test starts;

[0087] Test parameters: pressure of pressure sensor VII 15.7 (pressure of rodless cavity of tested cylinder 16), test time.

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Abstract

The invention discloses a hydraulic system and a test method of a test stand for a hydraulic cylinder of an outrigger working condition. The oil outlet of the main pump is connected with a flow meter; the flow meter is connected with a three-position four-way reversing valve I; the three-position four-way reversing valve I controls the cylinder under test. The loading pump sucks oil from the oil tank, and the oil outlet of the loading pump is respectively connected with a pressure gauge II, a relief valve II, a three-position four-way reversing valve IV, a three-position four-way reversing valve II, and a three-position four-way reversing valve III; The three-position four-way reversing valve IV controls the axial loading cylinder; the three-position four-way reversing valve II controls the lateral loading cylinder; the three-position four-way reversing valve III controls the tested cylinder. The invention can simulate the installation form of the outrigger hydraulic cylinder and the radial and lateral loads received in the whole working cycle, and cycle loading to test the reliability and service life of the outrigger hydraulic cylinder, and can test its minimum starting pressure, Various performance indicators such as internal leakage and leakage test under low pressure provide hydraulic drive for outrigger hydraulic cylinder products for imitation working conditions and factory tests.

Description

technical field [0001] The invention relates to the technical field of hydraulic cylinders, in particular to a hydraulic system and a test method of a hydraulic cylinder imitating working condition test bench for outriggers. Background technique [0002] As a key executive element in construction machinery, some hydraulic cylinders need to bear large side loads according to the installation location and role, such as wheeled cranes, truck-mounted cranes, pump trucks, rotary drilling rigs, etc. outrigger cylinder. [0003] The outrigger hydraulic cylinder generally refers to the four retractable hydraulic cylinders extending from the chassis of the vehicle in order to ensure the stability of the fuselage during the operation of the engineering vehicle. Vehicle, hence the name outrigger hydraulic cylinder, also called vertical hydraulic cylinder. The outrigger hydraulic cylinder is mainly used for construction machinery with high stability of the body when working with wheel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B19/00F15B13/02F15B21/041F15B21/0423
CPCF15B19/007F15B13/02F15B13/027F15B21/041F15B21/0423
Inventor 王伟伟李小明李永奇刘庆教孙永红
Owner XCMG HYDRAULICS CO LTD
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