CN114112384A - Multifunctional variable-amplitude hydraulic cylinder reliability test device and test method - Google Patents
Multifunctional variable-amplitude hydraulic cylinder reliability test device and test method Download PDFInfo
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- CN114112384A CN114112384A CN202111441539.7A CN202111441539A CN114112384A CN 114112384 A CN114112384 A CN 114112384A CN 202111441539 A CN202111441539 A CN 202111441539A CN 114112384 A CN114112384 A CN 114112384A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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Abstract
The invention belongs to a hydraulic cylinder performance detection device, and particularly relates to a multifunctional variable-amplitude hydraulic cylinder reliability test device which comprises a foundation, wherein a crane arm support with a plurality of sections of telescopic arms is hinged on the foundation, a telescopic hydraulic cylinder is arranged between a section of arm close to the foundation and a section of arm far away from the foundation in the crane arm support, a plurality of upper connecting hinge points are arranged on one section of arm of the crane arm support, a plurality of lower connecting hinge points are arranged on the foundation, the cylinder bottom of a tested variable-amplitude cylinder is hinged with one of the lower connecting hinge points, and a piston rod of the tested variable-amplitude cylinder is hinged with one of the upper connecting hinge points; the end part of the tail arm of the crane arm support is connected with a variable load through a steel wire rope. The crane boom is provided with a plurality of upper connecting hinge points, the foundation is provided with a plurality of lower connecting hinge points, and the crane boom can be connected with variable-amplitude cylinders of different specifications for testing, so that the test limitation is reduced, the test is single, and the detection range is enlarged. Through long-term tests of different loads, relevant data required by calculation of key reliability indexes of the amplitude-variable hydraulic cylinder can be obtained.
Description
Technical Field
The invention belongs to a hydraulic cylinder performance detection device, and particularly relates to a multifunctional variable-amplitude hydraulic cylinder reliability test device and a test method.
Background
The amplitude-variable hydraulic cylinder is one of the most main working devices of engineering machinery such as cranes, container reach cranes, fire trucks, pump trucks and the like, is generally an engineering hydraulic cylinder with front and rear double-hinge-point connection, and can change the angle of an engineering mechanical arm frame through the expansion and contraction of the engineering hydraulic cylinder to achieve the amplitude-variable effect. The amplitude-variable hydraulic cylinder is mainly characterized by low speed stability, pressure maintaining property, low small cavity pressure and high large cavity pressure, most of the amplitude-variable hydraulic cylinder is a push cylinder, and retraction is realized by gravity. Meanwhile, the actuating element serving as the boom structure needs to perform telescopic motion under a load condition, and the safety and reliability requirements are high, so that the newly developed hydraulic cylinder needs to perform safety and reliability tests before being delivered to a user, and the related standards of a variable-amplitude hydraulic cylinder reliability test device are not available in China at present. The existing test device has the following defects: 1. no load does not meet the reliability test requirements; 2. the device is horizontally placed, and is not an artificial working condition; 3. the two ends of the hydraulic cylinder are not fixedly installed, so that potential safety hazards such as the piston rod is knocked out in the test process.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the multifunctional variable-amplitude hydraulic cylinder reliability test device. Through long-term tests of different loads, relevant data required by calculation of key reliability indexes of the amplitude-variable hydraulic cylinder can be obtained.
The invention is realized by the following technical scheme: a multifunctional amplitude-variable hydraulic cylinder reliability test device comprises a foundation, wherein a crane arm support with a plurality of sections of telescopic arms is hinged to the foundation, a telescopic hydraulic cylinder is arranged between a section of arm close to the foundation and a section of arm far away from the foundation in the crane arm support, a plurality of upper connecting hinge points are arranged on a section of arm of the crane arm support, a plurality of lower connecting hinge points are arranged on the foundation, the bottom of a tested amplitude-variable cylinder is hinged to one of the lower connecting hinge points, and a piston rod of the tested amplitude-variable cylinder is hinged to one of the upper connecting hinge points; the end part of the tail arm of the crane arm support is connected with a variable load through a steel wire rope.
Further, the variable load is a fixed adjustable loading device.
Furthermore, 3 upper connecting hinge points are arranged on one section of arm of the crane arm support, and 2 lower connecting hinge points are arranged on the foundation.
Furthermore, the cylinder bottom of the telescopic hydraulic cylinder is hinged with one section of arm of the crane arm support, and a piston rod of the telescopic hydraulic cylinder is hinged with the tail section of arm of the crane arm support.
Further, an angle sensor is mounted at the bottom of the crane boom; force sensors are arranged at the bottom end of the inner cylinder of the tested amplitude cylinder, the piston rod end of the telescopic hydraulic cylinder and a connecting part of the variable load and the crane arm support; and displacement sensors are arranged at the piston rod of the telescopic hydraulic cylinder and the piston rod of the tested amplitude-changing cylinder.
The invention also provides a test method adopting the multifunctional variable-amplitude hydraulic cylinder reliability test device, which comprises the steps of selecting proper upper connecting hinge point, proper lower connecting hinge point and proper load according to the stroke and the simulated working condition of the tested variable-amplitude cylinder, firstly lifting the test device to the angle required by the test by the tested variable-amplitude cylinder to the stroke required by the test, and researching the jogging property, the motion reliability and the pressure holding property of the test variable-amplitude cylinder through the change of the tested variable-amplitude cylinder under different load conditions.
The invention has the beneficial effects that: 1. the test device has simple and practical structure; 2. the installation and operation of the tested amplitude cylinder completely simulate the working condition of the host, and the test data is more accurate; 3. the telescopic motion test can be performed on tested variable-amplitude cylinders of different specifications under different load conditions through the 3 upper connecting hinge points at different positions, the 2 lower connecting hinge points at different positions and the adjustable variable load; 4. the test device is provided with an angle sensor (arranged at the bottom of the crane boom and used for detecting the angle between the crane boom and the foundation), a force sensor (arranged at the bottom end of an inner cylinder of the tested luffing cylinder and used for detecting the pressure at the tested luffing cylinder, a piston rod end of a telescopic hydraulic cylinder and used for detecting the tension at the top end of the telescopic hydraulic cylinder, a connecting part of a variable load and the crane boom and used for detecting the lateral pressure at the connecting part of the variable load and the crane boom), a displacement sensor (arranged at a piston rod of the telescopic hydraulic cylinder and used for detecting the telescopic distance of the telescopic hydraulic cylinder and arranged at the piston rod of the tested luffing cylinder and used for detecting the telescopic distance of the tested luffing cylinder) and other auxiliary detection devices, and can better monitor the tested luffing cylinder and the displacement change, the protection and calibration functions are achieved by observing and analyzing the occurrence frequency and the fluctuation of data acquired by the sensor.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure, the device comprises a base 1, a tested amplitude cylinder 2, a crane arm support 3, a telescopic hydraulic cylinder 4, an upper connecting hinge point 5, a variable load 6, a lower connecting hinge point 7 and a lower connecting hinge point.
Detailed Description
The invention is further illustrated below with reference to the figures and examples.
As shown in fig. 1, the multifunctional variable-amplitude hydraulic cylinder reliability test device comprises a foundation 1, wherein the foundation 1 is a concrete structure which is used for fixing the test device and is constructed on the ground by civil engineering. The base 1 is hinged with a crane arm support 3, and the crane arm support 3 is provided with a plurality of sections of telescopic arms. A telescopic hydraulic cylinder 4 is arranged between a section of arm close to the foundation 1 and a section of tail arm far away from the foundation 1 in the crane boom 3, the bottom of the telescopic hydraulic cylinder 4 is hinged with the section of arm of the crane boom 3, and a piston rod of the telescopic hydraulic cylinder 4 is hinged with the section of tail arm of the crane boom 3. In the test process, the telescopic hydraulic cylinder 4 provides power for the telescopic of the crane boom 3, and different loads are provided for the tested variable amplitude cylinder 2 by changing the length of the crane boom 3. 3 upper connecting hinge points 5 are arranged on one section of arm of the crane arm support 3, 2 lower connecting hinge points 7 are arranged on the foundation 1, the cylinder bottom of the tested amplitude-changing cylinder 2 is hinged with one of the lower connecting hinge points 7, the piston rod of the tested amplitude-changing cylinder 2 is hinged with one of the upper connecting hinge points 5, and the tested amplitude-changing cylinder 2 with different specifications can be subjected to telescopic motion tests through the 3 upper connecting hinge points 5 with different positions and the 2 lower connecting hinge points 7 with different positions. The end part of the last arm of the crane arm support 3 is connected with a variable load 6 through a steel wire rope, the variable load 6 can be adjusted according to test requirements, and the telescopic motion test of the tested variable-amplitude cylinder 2 under different load conditions can be provided by adjusting the variable load 6.
Preferably, in this embodiment, the variable load 6 is a fixed adjustable loading device, and the telescopic motion test of the tested luffing cylinder 2 under different load conditions is provided by adjusting the fixed adjustable loading device.
The invention also provides a test method for testing the performance of the tested variable-amplitude cylinder 2 by adopting the multifunctional variable-amplitude hydraulic cylinder reliability test device, according to the stroke and simulated working condition test conditions of the tested variable-amplitude cylinder 2, selecting proper upper connecting hinge point 5, lower connecting hinge point 7 and load (the load is adjusted by a variable load 6), firstly lifting the test device to the angle required by the test by the tested variable-amplitude cylinder 2, extending the telescopic hydraulic cylinder 4 to the stroke required by the test, researching the micro-mobility and the motion reliability of the tested variable-amplitude cylinder 2 by the change of the tested variable-amplitude cylinder 2 under different load conditions (a force sensor shows whether the pressure change is stable, what trend is shown, what curve is shown and the like), whether the curve changes regularly or not is checked, so that the stability of the test amplitude cylinder 2 is researched) and the pressure maintaining performance (whether the pressure of the force sensor tends to be stable or not is checked when the hydraulic valve of the tested amplitude cylinder 2 is locked); aiming at tested amplitude cylinders with different strokes, the detection requirement can be met through the selection of the upper connecting hinge point 5 and the lower connecting hinge point 7.
Claims (6)
1. The utility model provides a multi-functional variable amplitude class pneumatic cylinder reliability test device which characterized in that: the device comprises a foundation (1), wherein a crane arm support (3) with a plurality of sections of telescopic arms is hinged on the foundation (1), a telescopic hydraulic cylinder (4) is arranged between a section of arm close to the foundation (1) and a section of arm far away from the foundation (1) in the crane arm support (3), a plurality of upper connecting hinge points (5) are arranged on a section of arm of the crane arm support (3), a plurality of lower connecting hinge points (7) are arranged on the foundation (1), the cylinder bottom of a tested amplitude-variable cylinder (2) is hinged with one of the lower connecting hinge points (7), and a piston rod of the tested amplitude-variable cylinder (2) is hinged with one of the upper connecting hinge points (5); the end part of the tail arm of the crane arm support (3) is connected with a variable load (6) through a steel wire rope.
2. The multifunctional amplitude-variable hydraulic cylinder reliability test device according to claim 1, characterized in that: the variable load (6) is a fixed adjustable loading device.
3. The multifunctional amplitude-variable hydraulic cylinder reliability test device according to claim 1, characterized in that: and 3 upper connecting hinge points (5) are arranged on one section of arm of the crane arm support (3), and 2 lower connecting hinge points (7) are arranged on the foundation (1).
4. The multifunctional amplitude-variable hydraulic cylinder reliability test device according to claim 1, characterized in that: the cylinder bottom of the telescopic hydraulic cylinder (4) is hinged with one section of arm of the crane arm support (3), and the piston rod of the telescopic hydraulic cylinder (4) is hinged with the tail section of arm of the crane arm support (3).
5. The multifunctional amplitude-variable hydraulic cylinder reliability test device according to claim 4, characterized in that: an angle sensor is arranged at the bottom of the crane arm support (3); force sensors are arranged at the bottom end of the inner cylinder of the tested amplitude cylinder (2), the piston rod end of the telescopic hydraulic cylinder (4) and the connecting part of the variable load (6) and the crane arm support (3); and displacement sensors are arranged at the piston rod of the telescopic hydraulic cylinder (4) and the piston rod of the tested amplitude-changing cylinder (2).
6. A test method adopting the multifunctional amplitude-variable hydraulic cylinder reliability test device of claim 1 is characterized in that: according to the stroke and the simulated working condition of the tested amplitude cylinder (2), a proper upper connecting hinge point (5), a proper lower connecting hinge point (7) and a proper load are selected, firstly, the tested amplitude cylinder (2) lifts the test device to the angle required by the test, then, the telescopic hydraulic cylinder (4) is stretched to the stroke required by the test, and the micro-motion performance, the motion reliability and the pressure retention performance of the test amplitude cylinder (2) are researched through the change of the tested amplitude cylinder (2) under different load conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111441539.7A CN114112384A (en) | 2021-11-30 | 2021-11-30 | Multifunctional variable-amplitude hydraulic cylinder reliability test device and test method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111441539.7A CN114112384A (en) | 2021-11-30 | 2021-11-30 | Multifunctional variable-amplitude hydraulic cylinder reliability test device and test method |
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| CN114112384A true CN114112384A (en) | 2022-03-01 |
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| CN202111441539.7A Pending CN114112384A (en) | 2021-11-30 | 2021-11-30 | Multifunctional variable-amplitude hydraulic cylinder reliability test device and test method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105047064A (en) * | 2015-08-25 | 2015-11-11 | 大连理工大学 | Crane teaching experiment platform |
| CN113417906A (en) * | 2021-07-23 | 2021-09-21 | 徐州徐工液压件有限公司 | Long-stroke hydraulic cylinder reliability test device for cantilever crane machinery |
| CN113700701A (en) * | 2020-05-21 | 2021-11-26 | 徐州徐工液压件有限公司 | Hydraulic cylinder stroke end buffering performance testing device and testing method |
-
2021
- 2021-11-30 CN CN202111441539.7A patent/CN114112384A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105047064A (en) * | 2015-08-25 | 2015-11-11 | 大连理工大学 | Crane teaching experiment platform |
| CN113700701A (en) * | 2020-05-21 | 2021-11-26 | 徐州徐工液压件有限公司 | Hydraulic cylinder stroke end buffering performance testing device and testing method |
| CN113417906A (en) * | 2021-07-23 | 2021-09-21 | 徐州徐工液压件有限公司 | Long-stroke hydraulic cylinder reliability test device for cantilever crane machinery |
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