CN116717526A - Oil cylinder pressure testing device and testing method - Google Patents
Oil cylinder pressure testing device and testing method Download PDFInfo
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- CN116717526A CN116717526A CN202310999813.5A CN202310999813A CN116717526A CN 116717526 A CN116717526 A CN 116717526A CN 202310999813 A CN202310999813 A CN 202310999813A CN 116717526 A CN116717526 A CN 116717526A
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- 230000006835 compression Effects 0.000 claims abstract description 25
- 238000007906 compression Methods 0.000 claims abstract description 25
- 230000003068 static effect Effects 0.000 claims description 24
- 238000012669 compression test Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 6
- 230000005389 magnetism Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000003111 delayed effect Effects 0.000 claims description 2
- 235000000396 iron Nutrition 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 239000003921 oil Substances 0.000 description 121
- 239000010720 hydraulic oil Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The invention discloses an oil cylinder pressure testing device and an oil cylinder pressure testing method, and relates to the technical field of oil cylinder testing. The invention comprises a test positioning component and a test component; the testing positioning assembly comprises a bottom plate, wherein an upright post is fixedly arranged on the bottom plate, a testing oil cylinder is fixedly arranged on the upright post, a pressure testing block is fixedly arranged at the driving end of the testing oil cylinder, a pedestal is slidably arranged on the bottom plate, and an oil cylinder positioning assembly to be tested is fixedly arranged on the pedestal; the testing assembly comprises a hydraulic station, an oil pressure transmitter, a grating ruler and a testing host, wherein an oil outlet end and an oil return end of the hydraulic station are respectively connected with an oil feeding pipeline and an oil return pipeline of a testing oil cylinder and an oil cylinder to be tested through high-pressure ball valves; the oil cylinder pressure testing device and the oil cylinder pressure testing method can dynamically test the compression resistance and the jacking capacity of the oil cylinder to be tested after active compression and passive compression, and can keep the oil cylinder to be tested in a vertical state all the time during testing.
Description
Technical Field
The invention belongs to the technical field of oil cylinder testing, and particularly relates to an oil cylinder pressure testing device and an oil cylinder pressure testing method.
Background
The hydraulic oil cylinder is used as one of the executive components of the hydraulic system, the performance of the hydraulic oil cylinder not only directly determines the reliability of the hydraulic system, but also influences the normal operation and maintenance of equipment, so that the technical requirements and the safety coefficient requirements on the hydraulic oil cylinder are very high, and whether the performance of the hydraulic oil cylinder can meet the technical requirements is detected by a test bench. The hydraulic cylinder test bed (also called as a cylinder test bed) can test the oil inlet pressure, the oil return pressure, the pressure overload and the like of the hydraulic cylinder before the hydraulic cylinder leaves a factory, and can also be used for the maintenance and detection of the cylinder, thereby detecting the operation performance, the lowest starting pressure, the internal leakage condition, the pressure resistance and the like of the cylinder.
The prior art patent application number is CN200510030903.5, the technical scheme is to design a set of general device, and the test of the pressure oil cylinders with different diameters can be applicable by replacing individual parts in the device. The invention has the advantages of being applicable to the pressure test of the tested oil cylinders with different diameters, being more applicable to the test of the large-diameter oil cylinder of the large-sized press, having good universality and saving labor, materials and yards compared with the prior art.
The oil cylinder pressure testing device and the oil cylinder pressure testing method have the following problems:
1. the oil cylinder to be tested cannot be positioned and limited accurately, and the oil cylinder is easy to tilt during testing;
2. the existing oil cylinder pressure test method is usually measured in a static pressure maintaining mode, so that the load capacity and the retraction amount after being stressed of the oil cylinder cannot be accurately estimated, and the pressure test and the estimation after the oil pressure is stressed cannot be well performed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an oil cylinder pressure testing device and an oil cylinder pressure testing method which can overcome the problems or at least partially solve the problems.
In order to solve the technical problems, the invention adopts the basic conception of the technical scheme that: the oil cylinder pressure testing device comprises a testing positioning component and a testing component;
the testing positioning assembly comprises a bottom plate, wherein an upright post is fixedly arranged on the bottom plate, a testing oil cylinder is fixedly arranged on the upright post, a pressure testing block is fixedly arranged at the driving end of the testing oil cylinder, a pedestal is slidably arranged on the bottom plate, and an oil cylinder positioning assembly to be tested is fixedly arranged on the pedestal;
the test assembly includes:
the oil outlet end and the oil return end of the hydraulic station are respectively connected with an oil feeding pipeline and an oil return pipeline of the test oil cylinder and the oil cylinder to be tested through high-pressure ball valves;
the oil pressure transmitter is arranged on an oil outlet pipeline of the hydraulic station and is arranged at the output end of the high-pressure ball valve;
the pressure transmitter is arranged inside the pressure test block;
the grating ruler is fixed on the side of the test oil cylinder and is parallel to the axis of the test oil cylinder, and the sliding block of the grating ruler is fixed on the side of the pressure test block; the ruler body of the grating ruler is fixed on the inner side of the upright post through a support;
the hydraulic station, the high-pressure ball valve, the oil pressure transmitter, the pressure transmitter and the grating ruler are connected to the test host;
the touch panel is connected with the test host, and comprises a test object selection button, a static measurement button, a dynamic measurement button and a determination button.
Further, the pressure test block comprises an upper flange block and a lower flange block which are mutually embedded or attached; a plurality of sliding rods penetrate through the space between the upper flange block and the lower flange block; the two ends of the sliding rod are of a threaded structure and are screwed with nut bodies, and the two ends of the sliding rod and the nut bodies are arranged in counter bores of the upper flange block and the lower flange block; the top surface of the upper flange block is fastened with the telescopic end of the test oil cylinder; the top surface and the bottom surface of the pressure transmitter are respectively embedded between the bottom surface of the upper flange block and the top surface of the lower flange block, and are screwed in and adjusted through the nut body, so that the pressure transmitter is at a value of 0, the testing oil cylinder is fixedly connected with the upper flange block, when a piston rod of the testing oil cylinder stretches out and draws back, the upper flange block is synchronously driven to slide up and down, when the lower flange block is not contacted with the oil cylinder to be tested, the pressure transmitter is always at a value of 0, and after the bottom surface of the lower flange block is contacted with the oil cylinder to be tested, the testing oil cylinder drives the upper flange block to descend, so that the pressure is transmitted to the oil cylinder to be tested, meanwhile, the pressure transmitter between the upper flange block and the lower flange block is continuously applied with pressure, and the pressure transmitter transmits the pressure value to the testing host in real time.
Further, the hydro-cylinder locating component that awaits measuring is including being fixed in four fixed pole settings on the pedestal, slidable mounting has the side end locating piece in the fixed pole setting, the side end locating piece includes semi-ring fixed block, location arc piece, adjusting bolt, the back fixed mounting of semi-ring fixed block have two with fixed pole setting assorted slip cap, threaded mounting has three adjusting bolt on the semi-ring fixed block, adjusting bolt passes the semi-ring fixed block with location arc piece rotates to be connected, rotate on the location arc piece and install a plurality of small-size rotation stopper.
In order to fix the oil cylinder to be tested from the bottom, a bottom limiting block is arranged in the pedestal in a sliding manner, a compression spring is fixedly arranged on the back surface of the bottom limiting block, and the other end of the compression spring is fixedly connected with the pedestal; in order to prevent the compression spring from sliding and shifting, a sliding block is fixedly arranged at the bottom end of the bottom limiting block, and a sliding groove matched with the sliding block is formed in the pedestal; in order to limit the sliding track of the pedestal, preferably, a limit sliding block is fixedly arranged at the bottom end of the pedestal, and a limit sliding groove matched with the limit sliding block is arranged on the bottom plate; in order to fix the pedestal, a limiting rotating block matched with the pedestal is rotatably arranged on the bottom plate; in order to limit the positions of the fixed upright posts, preferably, four fixed upright posts are uniformly distributed on the top surface of the pedestal, and the connecting lines of the fixed upright posts and the adjacent fixed upright posts are square; in order to clamp the oil cylinder to be tested from different directions, two side end positioning blocks are in a group, one group of side end positioning blocks is in sliding connection with four fixed vertical rods, and each group of side end positioning blocks are distributed in a crossed mode; in order to adjust the position and the height between the side end positioning blocks, a plurality of height adjusting sleeves are slidably arranged on the fixed upright rods.
In order to enable the two side end positioning blocks to be adsorbed and fixed, further, the two ends of the semi-ring fixing block are fixedly provided with magnetic attraction irons with opposite magnetism.
The oil cylinder pressure testing method comprises the following steps:
step 1, positioning and mounting an oil cylinder to be tested, mounting the oil cylinder to be tested on a pedestal, and positioning and limiting the oil cylinder to be tested through an oil cylinder positioning assembly to be tested;
step 2, installing a test source, and connecting an oil inlet end and an oil return end of an oil cylinder to be tested to a hydraulic station;
step 3, static test, namely selecting a test object selection button through a touch panel, selecting the specification of an oil cylinder to be tested, then pressing a determination button, completing specification selection, then pressing a static determination button, determining through the determination button, entering a static test flow, closing a high-pressure ball valve of a loop of the oil cylinder to be tested by a test host machine during static test, pressurizing the oil cylinder to be tested by a hydraulic station, feeding back a pressure value to the test host machine through an oil pressure transmitter, closing another high-pressure ball valve of the oil cylinder to be tested after the test host machine monitors that the pressure reaches the pressure value set by the specification, closing the hydraulic station, and acquiring an initial pressure value by the test host machine at the moment through the oil pressure transmitter;
then, setting a time threshold in a delayed manner, and acquiring a pressure value monitored by the oil pressure transmitter again by the test host, wherein the current pressure value is reduced by 10% compared with the initial pressure value, and the static test is passed to indicate that the tightness of the oil cylinder meets the requirement;
step 4, dynamic testing, namely after the static testing is finished, a dynamic measuring button is pressed down, after the dynamic testing is finished, the dynamic testing flow is carried out, when the dynamic testing is finished, the compression testing is carried out, the cylinder to be tested is kept at a set pressure value of the specification according to the static testing flow during testing, the compression testing is waited, when the compression testing is carried out, the hydraulic station drives the testing cylinder to act and continuously linearly extend, meanwhile, the oil pressure transmitter, the pressure transmitter and the grating ruler continuously transmit detection data acquired in real time to a testing host, when the pressure testing block is pressed to the cylinder to be tested, the grating ruler is cleared, when the oil pressure acquired by the oil pressure transmitter connected with the cylinder to be tested reaches the set pressure value of the specification, the testing host reads grating ruler data, meanwhile, the hydraulic station is closed, the data read by the grating ruler is a retraction value after the cylinder to be tested is subjected to the set pressure, when the retraction value is lower than a threshold, and otherwise, the compression testing of the cylinder to be tested is judged to be qualified;
after the compression test of the cylinder to be tested passes, carrying out load test, when the load test is carried out, regulating the pressure of the cylinder to a fixed pressure value, closing a high-pressure ball valve, carrying out load test, lifting the cylinder to be tested to a pressure test block, when the pressure transmitter is pressurized, clearing a grating ruler, at this time, continuously supplying oil to the cylinder to be tested by a hydraulic station until the oil pressure acquired by the oil pressure transmitter reaches the pressure value set by the specification, reading grating ruler data by a test host, closing the hydraulic station at the same time, and judging that the compression test of the cylinder to be tested is qualified when the load force reaches a set threshold value, or judging that the cylinder to be tested is disqualified when the load force reaches the set threshold value.
Further, the positioning assembly of the cylinder to be detected positions and limits the cylinder to be detected as follows:
step 1, inserting the bottom of an oil cylinder to be tested into a pedestal, and enabling a bottom limiting block in the pedestal to clamp and fix the bottom of the oil cylinder to be tested;
step 2, sliding and installing side end positioning blocks on the fixed upright rod, enabling a sliding sleeve to be sleeved on the fixed upright rod in a sliding mode, enabling the two side end positioning blocks to be a group, enabling the small-sized rotating limiting block to rotate on the positioning arc block, enabling the threads to rotate an adjusting bolt, adjusting the distance between the positioning arc block and the semi-ring fixing block, enabling the small-sized rotating limiting block to tightly abut against the cylinder to be tested, and clamping and fixing the side end of the cylinder to be tested;
step 3, after the first group of side end positioning blocks are installed, a height adjusting sleeve is slidably installed on the fixed upright rod, the distances between the different groups of side end positioning blocks are adjusted and controlled, and the side end positioning blocks are sequentially distributed in a crossed mode, so that clamping of the oil cylinder to be tested is completed;
step 4, the pedestal is slidably mounted on the bottom plate through the limiting sliding block and the limiting sliding groove, the cylinder to be tested is located under the pressure test block, the limiting rotating block is rotated, and the cylinder to be tested and the pedestal are fixed;
and 5, when the first oil cylinder to be tested is in pressure test, installing and fixing a second oil cylinder to be tested on the second pedestal, and after the pressure test of the first oil cylinder to be tested is completed, rotating the limiting rotating block, directly sliding and removing the first pedestal (5) and the oil cylinder to be tested, and sliding and installing the second pedestal and the second oil cylinder to be tested to wait for the second group of pressure test.
After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects: according to the cylinder pressure testing device and the cylinder pressure testing method, the cylinder to be tested can be positioned and limited, so that the cylinder to be tested is in a vertical stress state, the cylinder to be tested only receives pressure vertically and cannot deviate, the cylinder to be tested is high in stress linearity during testing, and the compression resistance and the top load capacity of the cylinder to be tested can be accurately and quantitatively measured.
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
In the drawings:
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the structure of the base plate and the column of the present invention;
FIG. 3 is a schematic diagram of a test assembly according to the present invention;
FIG. 4 is a schematic diagram of a test assembly connection structure of the present invention;
FIG. 5 is a schematic diagram of a control host and test assembly connection according to the present invention;
FIG. 6 is a schematic view of a pedestal and a side positioning block according to the present invention;
fig. 7 is a schematic view of the pedestal structure of the present invention;
fig. 8 is a schematic view of the internal structure of the pedestal of the present invention;
FIG. 9 is a schematic view of a set of side end positioning blocks according to the present invention;
FIG. 10 is a schematic view of a single side end locating block of the present invention;
fig. 11 is a schematic view of the structure of the height adjusting sleeve of the present invention.
In the figure: 1. a bottom plate; 101. limiting sliding grooves; 102. limiting rotating blocks; 2. a column; 21. A support; 3. testing an oil cylinder; 4. a pressure test block; 41. an upper flange block; 42. a lower flange block; 43. a slide bar; 44. a nut body 44; 5. a pedestal; 501. a limit sliding block; 502. a bottom limiting block; 503. a compression spring; 504. a sliding block; 6. a side end positioning block; 601. a semi-ring fixing block; 602. positioning an arc block; 603. a sliding sleeve; 604. an adjusting bolt; 605. a small-sized rotation limiting block; 7. fixing the vertical rod; 8. a height adjusting sleeve. 9. A pressure transmitter; 10. and a grating ruler.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
Examples:
referring to fig. 1-11, an oil cylinder pressure testing device comprises a testing positioning assembly and a testing assembly, wherein the testing positioning assembly comprises a bottom plate 1, an upright post 2 is fixedly arranged on the bottom plate 1, a testing oil cylinder 3 is fixedly arranged on the upright post 2, a pressure testing block 4 is fixedly arranged at the driving end of the testing oil cylinder 3, a pedestal 5 is slidably arranged on the bottom plate 1, and an oil cylinder positioning assembly to be tested is fixedly arranged on the pedestal 5;
the testing assembly comprises a hydraulic station, and an oil outlet end and an oil return end of the hydraulic station are respectively connected with an oil feeding pipeline and an oil return pipeline of the testing oil cylinder 3 and the oil cylinder to be tested through high-pressure ball valves; the oil pressure transmitter is arranged on an oil outlet pipeline of the hydraulic station and is arranged at the output end of the high-pressure ball valve; and a pressure transmitter 9 installed inside the pressure test block 4; the grating ruler 10 is fixed on the side of the test oil cylinder 3 and is parallel to the axis of the test oil cylinder 3, and a sliding block of the grating ruler 10 is fixed on the side of the pressure test block 4; the ruler body of the grating ruler is fixed on the inner side of the upright post 2 through a support 21; the oil pressure transmitter, the pressure transmitter 9 and the grating ruler 10 are connected to a testing host, and the testing host is connected with a touch panel; the touch panel includes a test object selection button, a static measurement button, a dynamic measurement button, and a determination button.
The pressure test block 4 comprises an upper flange block 41 and a lower flange block 42 which are mutually embedded or attached; a plurality of sliding rods 43 penetrate through the space between the upper flange block 41 and the lower flange block 42; the two ends of the sliding rod 43 are of a threaded structure and are screwed with nut bodies 44, and the two ends of the sliding rod 43 and the nut bodies 44 are arranged in counter bores of the upper flange block 41 and the lower flange block 42; the top surface of the upper flange block 41 is fastened with the telescopic end of the test cylinder 3; the top and bottom surfaces of the pressure transmitter are respectively embedded between the bottom surface of the upper flange block 41 and the top surface of the lower flange block 42, and are adjusted by screwing the nut body 44, so that the pressure transmitter is at a value of 0.
The oil cylinder positioning assembly to be tested comprises four fixed vertical rods 7, a side end positioning block 6 is slidably arranged on the fixed vertical rods 7, the side end positioning block 6 comprises a semi-ring fixing block 601, a positioning arc block 602 and an adjusting bolt 604, two sliding sleeves 603 matched with the fixed vertical rods 7 are fixedly arranged on the back surface of the semi-ring fixing block 601, three adjusting bolts 604 are arranged on the semi-ring fixing block 601 in a threaded mode, the adjusting bolts 604 penetrate through the semi-ring fixing block 601 to be rotationally connected with the positioning arc block 602, and a plurality of small rotating limiting blocks 605 are rotationally arranged on the positioning arc block 602.
The pedestal 5 is internally provided with a bottom limiting block 502 in a sliding manner, the back surface of the bottom limiting block 502 is fixedly provided with a compression spring 503, the other end of the compression spring 503 is fixedly connected with the pedestal 5, the bottom end of the bottom limiting block 502 is fixedly provided with a sliding block 504, a sliding groove matched with the sliding block 504 is arranged in the pedestal 5, the bottom of the cylinder to be tested is inserted into the pedestal 5, and the bottom limiting block 502 clamps and fixes the bottom of the cylinder to be tested under the pushing of the compression spring 503.
The bottom fixed mounting of pedestal 5 has spacing slider 501, is equipped with on the bottom plate 1 with spacing slider 501 assorted spacing spout 101, rotates on the bottom plate 1 install with pedestal 5 assorted spacing commentaries on classics piece 102, along spacing spout 101 slidable mounting with dismantle pedestal 5, when pedestal 5 removes under the pressure test piece 4, rotate spacing commentaries on classics piece 102 and fix pedestal 5.
Four fixed pole setting 7 evenly distributed are in the top surface of pedestal 5, the line of fixed pole setting 7 and adjacent fixed pole setting 7 is square, two side locating pieces 6 are a set of, a set of side locating piece 6 and four fixed pole setting 7 sliding connection, every side locating piece 6 cross distribution, the both ends fixed mounting of semi-ring fixed block 601 have magnetism opposite magnetism magnet, slidable mounting has a plurality of altitude mixture control cover 8 on the fixed pole setting 7, a set of side locating piece 6 is from the front and back place to wait to survey the hydro-cylinder and is carried out the centre gripping, another set of side locating piece 6 is from controlling the place to wait to survey the hydro-cylinder and is carried out the centre gripping fixedly to the hydro-cylinder that awaits measuring through the mode of cross distribution, two side locating pieces 6 of every group are through magnetism magnet fixed connection.
The invention relates to a cylinder pressure testing method, which comprises the following steps:
step 1, positioning and mounting an oil cylinder to be tested, mounting the oil cylinder to be tested on a pedestal, and positioning and limiting the oil cylinder to be tested through an oil cylinder positioning assembly to be tested;
step 2, installing a test source, and connecting an oil inlet end and an oil return end of an oil cylinder to be tested to a hydraulic station;
step 3, static test, selecting a test object selection button through a touch panel, selecting the specification of an oil cylinder to be tested, then pressing a determination button, completing specification selection, then pressing a static determination button, determining through the determination button, entering a static test flow, closing a high-pressure ball valve of a loop of the oil cylinder to be tested by a test host machine, pressurizing the oil cylinder to be tested by a hydraulic station, feeding back a pressure value to the test host machine through an oil pressure transmitter, closing another high-pressure ball valve of the oil cylinder to be tested after the test host machine monitors that the pressure reaches the pressure value set by the specification, closing the hydraulic station, acquiring an initial pressure value by the test host machine at the moment through the oil pressure transmitter, then delaying a set time threshold, acquiring the pressure value monitored by the oil pressure transmitter again by the test host machine, and enabling the current pressure value to be reduced to be less than 10% compared with the initial pressure value, wherein the static test is passed, and the fact that the tightness of the oil cylinder is required is indicated;
step 4, dynamic testing, namely after the static testing is finished, a dynamic measuring button is pressed down, after the dynamic testing is finished, the dynamic testing flow is carried out, when the dynamic testing is finished, the compression testing is carried out, the cylinder to be tested is kept at a set pressure value of the specification according to the static testing flow during testing, the compression testing is waited, when the compression testing is carried out, the hydraulic station drives the testing cylinder to act and continuously linearly extend, meanwhile, the oil pressure transmitter, the pressure transmitter and the grating ruler continuously transmit detection data acquired in real time to a testing host, when the pressure testing block is pressed to the cylinder to be tested, the grating ruler is cleared, when the oil pressure acquired by the oil pressure transmitter connected with the cylinder to be tested reaches the set pressure value of the specification, the testing host reads grating ruler data, meanwhile, the hydraulic station is closed, the data read by the grating ruler is a retraction value after the cylinder to be tested is subjected to the set pressure, when the retraction value is lower than a threshold, and otherwise, the compression testing of the cylinder to be tested is judged to be qualified;
after the compression test of the cylinder to be tested passes, carrying out load test, when the load test is carried out, regulating the pressure of the cylinder to a fixed pressure value, closing a high-pressure ball valve, carrying out load test, lifting the cylinder to be tested to a pressure test block, when the pressure transmitter is pressurized, clearing a grating ruler, at this time, continuously supplying oil to the cylinder to be tested by a hydraulic station until the oil pressure acquired by the oil pressure transmitter reaches the pressure value set by the specification, reading grating ruler data by a test host, closing the hydraulic station at the same time, and judging that the compression test of the cylinder to be tested is qualified when the load force reaches a set threshold value, or judging that the cylinder to be tested is disqualified when the load force reaches the set threshold value.
The cylinder positioning assembly to be measured is used for positioning and limiting the cylinder to be measured, and is specifically as follows:
step 1, inserting the bottom of an oil cylinder to be tested into a pedestal 5, and clamping and fixing the bottom of the oil cylinder to be tested by a bottom limiting block 502 in the pedestal 5;
step 2, sliding and installing side end positioning blocks 6 on the fixed vertical rod 7, enabling a sliding sleeve 603 to sleeve the fixed vertical rod 7 in a sliding manner, enabling a small-sized rotating limiting block 605 to rotate on a positioning arc block 602, enabling threads to rotate an adjusting bolt 604, adjusting the distance between the positioning arc block 602 and a semi-ring fixing block 601, enabling the small-sized rotating limiting block 605 to automatically adjust and rotate according to the diameter of a cambered surface in contact with an oil cylinder to be tested, enabling the small-sized rotating limiting block 605 to tightly abut against the oil cylinder to be tested, and clamping and fixing the side end of the oil cylinder to be tested;
step 3, after the first group of side end positioning blocks 6 are installed, the height adjusting sleeves 8 are installed on the fixed vertical rods 7 in a sliding mode, the number of the height adjusting sleeves 8 is controlled according to requirements, the distances between the different groups of side end positioning blocks 6 are adjusted and controlled, the included angle between the second group of side end positioning blocks 6 and the first group of side end positioning blocks 6 is ninety degrees, the directions of the third group of side end positioning blocks 6 and the first group of side end positioning blocks 6 are identical, and the clamping of the oil cylinder to be tested is completed through the cross distribution in sequence;
step 4, the pedestal 5 is slidably mounted on the bottom plate 1 through the limit sliding block 501 and the limit sliding groove 101, the cylinder to be tested is positioned under the pressure test block 4, and then the limit rotating block 102 is rotated to fix the cylinder to be tested and the pedestal 5;
and 5, when the first oil cylinder to be tested is in pressure test, installing and fixing a second oil cylinder to be tested on the second pedestal 5, and after the pressure test of the first oil cylinder to be tested is completed, rotating the limiting rotating block 102, directly sliding and removing the first pedestal 5 and the oil cylinder to be tested, and sliding and installing the second pedestal 5 and the second oil cylinder to be tested to wait for a second group of pressure test.
The present invention is not limited to the above embodiments, but is not limited to the above embodiments, and any person skilled in the art will appreciate that the present invention is not limited to the above embodiments.
Claims (8)
1. The utility model provides an hydro-cylinder pressure testing arrangement which characterized in that: the test positioning device comprises a test positioning component and a test component;
the testing and positioning assembly comprises a bottom plate (1), wherein an upright post (2) is fixedly arranged on the bottom plate (1), a testing oil cylinder (3) is fixedly arranged on the upright post (2), a pressure testing block (4) is fixedly arranged at the driving end of the testing oil cylinder (3), a pedestal (5) is slidably arranged on the bottom plate (1), and an oil cylinder positioning assembly to be tested is arranged on the pedestal (5);
the test assembly includes;
the oil outlet end and the oil return end of the hydraulic station are respectively connected with the oil feeding pipeline and the oil return pipeline of the test oil cylinder (3) and the oil cylinder to be tested through high-pressure ball valves;
the oil pressure transmitter is arranged on an oil outlet pipeline of the hydraulic station and is arranged at the output end of the high-pressure ball valve;
a pressure transmitter (9), wherein the pressure transmitter (9) is arranged inside the pressure test block (4);
the grating ruler (10) is fixed on the side of the test oil cylinder (3) and is parallel to the axis of the test oil cylinder (3), and a sliding block of the grating ruler (10) is fixed on the side of the pressure test block (4); the ruler body of the grating ruler (10) is fixed on the inner side of the upright post (2) through a support (21);
the hydraulic station, the high-pressure ball valve, the oil pressure transmitter, the pressure transmitter (9) and the grating ruler (10) are connected to the testing host;
the touch panel is connected with the test host, and comprises a test object selection button, a static measurement button, a dynamic measurement button and a determination button.
2. The cylinder pressure testing device according to claim 1, wherein: the pressure test block (4) comprises an upper flange block (41) and a lower flange block (42) which are mutually embedded or attached; a plurality of sliding rods (43) penetrate through the space between the upper flange block (41) and the lower flange block (42); the two ends of the sliding rod (43) are of a threaded structure and are screwed with nut bodies (44), and the two ends of the sliding rod (43) and the nut bodies (44) are arranged in counter bores of the upper flange block (41) and the lower flange block (42); the top surface of the upper flange block (41) is fastened with the telescopic end of the test oil cylinder (3); the top surface and the bottom surface of the pressure transmitter (9) are respectively embedded between the bottom surface of the upper flange block (41) and the top surface of the lower flange block (42), and are adjusted by screwing the nut body (44) so that the pressure transmitter is at a value of 0.
3. The cylinder pressure testing device according to claim 1, wherein: the oil cylinder positioning assembly to be tested comprises four fixed vertical rods (7) fixed on a pedestal (5), side end positioning blocks (6) are slidably arranged on the fixed vertical rods (7), each side end positioning block (6) comprises a semi-ring fixing block (601), a positioning arc block (602) and an adjusting bolt (604), two sliding sleeves (603) matched with the fixed vertical rods (7) are fixedly arranged on the back of the semi-ring fixing block (601), three adjusting bolts (604) are arranged on the semi-ring fixing block (601) in a threaded mode, the adjusting bolts (604) penetrate through the semi-ring fixing block (601) and are rotationally connected with the positioning arc blocks (602), and a plurality of small-sized rotation limiting blocks (605) are rotationally arranged on the positioning arc blocks (602); the two side end positioning blocks (6) are in a group, one group of the side end positioning blocks (6) is in sliding connection with the four fixed vertical rods (7), and each group of the side end positioning blocks (6) is distributed in a crossed mode; a plurality of height adjusting sleeves (8) are slidably arranged on the fixed vertical rod (7).
4. A cylinder pressure testing apparatus according to claim 3, wherein: the pedestal (5) is internally provided with a bottom limiting block (502) in a sliding manner, the back surface of the bottom limiting block (502) is fixedly provided with a compression spring (503), and the other end of the compression spring (503) is fixedly connected with the pedestal (5); a sliding block (504) is fixedly arranged at the bottom end of the bottom limiting block (502), and a sliding groove matched with the sliding block (504) is arranged in the pedestal (5); a limit sliding block (501) is fixedly arranged at the bottom end of the pedestal (5), and a limit sliding groove (101) matched with the limit sliding block (501) is arranged on the bottom plate (1); and a limiting rotating block (102) matched with the pedestal (5) is rotatably arranged on the bottom plate (1).
5. A cylinder pressure testing apparatus according to claim 3, wherein: four fixed pole setting (7) evenly distributed is in the top surface of pedestal (5), fixed pole setting (7) with adjacent fixed pole setting (7) the link is square.
6. A cylinder pressure testing apparatus according to claim 3, wherein: two ends of the semi-ring fixing block (601) are fixedly provided with magnetic attraction irons with opposite magnetism.
7. A cylinder pressure testing method comprising a cylinder pressure testing apparatus according to any one of claims 1 to 2, characterized by comprising the steps of:
step 1, positioning and mounting an oil cylinder to be tested, mounting the oil cylinder to be tested on a pedestal (5), and positioning and limiting the oil cylinder to be tested through an oil cylinder positioning assembly to be tested;
step 2, installing a test source, and connecting an oil inlet end and an oil return end of an oil cylinder to be tested to a hydraulic station;
step 3, static test, namely selecting a test object selection button through a touch panel, selecting the specification of an oil cylinder to be tested, then pressing a determination button, completing specification selection, then pressing a static determination button, determining through the determination button, entering a static test flow, closing a high-pressure ball valve of a loop of the oil cylinder to be tested by a test host machine during static test, pressurizing the oil cylinder to be tested by a hydraulic station, feeding back a pressure value to the test host machine through an oil pressure transmitter, closing another high-pressure ball valve of the oil cylinder to be tested after the test host machine monitors that the pressure reaches the pressure value set by the specification, closing the hydraulic station, and acquiring an initial pressure value by the test host machine at the moment through the oil pressure transmitter;
then, setting a time threshold in a delayed manner, and acquiring a pressure value monitored by the oil pressure transmitter again by the test host, wherein the current pressure value is reduced by 10% compared with the initial pressure value, and the static test is passed to indicate that the tightness of the oil cylinder meets the requirement;
step 4, dynamic testing, namely after the static testing is finished, a dynamic measuring button is pressed down, after the dynamic testing is finished, the dynamic testing flow is carried out, when the dynamic testing is finished, the compression testing is carried out, the cylinder to be tested is kept at a set pressure value of the specification according to the static testing flow during testing, the compression testing is waited, when the compression testing is carried out, the hydraulic station drives the testing cylinder to act and continuously linearly extend, meanwhile, the oil pressure transmitter, the pressure transmitter and the grating ruler continuously transmit detection data acquired in real time to a testing host, when the pressure testing block is pressed to the cylinder to be tested, the grating ruler is cleared, when the oil pressure acquired by the oil pressure transmitter connected with the cylinder to be tested reaches the set pressure value of the specification, the testing host reads grating ruler data, meanwhile, the hydraulic station is closed, the data read by the grating ruler is a retraction value after the cylinder to be tested is subjected to the set pressure, when the retraction value is lower than a threshold, and otherwise, the compression testing of the cylinder to be tested is judged to be qualified;
after the compression test of the cylinder to be tested passes, carrying out load test, when the load test is carried out, regulating the pressure of the cylinder to a fixed pressure value, closing a high-pressure ball valve, carrying out load test, lifting the cylinder to be tested to a pressure test block, when the pressure transmitter is pressurized, clearing a grating ruler, at this time, continuously supplying oil to the cylinder to be tested by a hydraulic station until the oil pressure acquired by the oil pressure transmitter reaches the pressure value set by the specification, reading grating ruler data by a test host, closing the hydraulic station at the same time, and judging that the compression test of the cylinder to be tested is qualified when the load force reaches a set threshold value, or judging that the cylinder to be tested is disqualified when the load force reaches the set threshold value.
8. The method for testing the pressure of the oil cylinder according to claim 7, wherein the positioning and limiting of the oil cylinder to be tested by the positioning component of the oil cylinder to be tested is as follows:
step 1, inserting the bottom of an oil cylinder to be tested into a pedestal (5), and clamping and fixing the bottom of the oil cylinder to be tested by a bottom limiting block (502) in the pedestal (5);
step 2, sliding and installing side end positioning blocks (6) on the fixed vertical rod (7), enabling a sliding sleeve (603) to sleeve the fixed vertical rod (7) in a sliding manner, enabling the two side end positioning blocks (6) to be a group, enabling a small-sized rotating limiting block (605) to rotate on a positioning arc block (602), adjusting a distance between the positioning arc block (602) and a semi-ring fixing block (601) through threads to rotate an adjusting bolt (604), enabling the small-sized rotating limiting block (605) to tightly prop against an oil cylinder to be detected, and clamping and fixing the side end of the oil cylinder to be detected;
step 3, after the first group of side end positioning blocks (6) are installed, a height adjusting sleeve (8) is slidably installed on the fixed vertical rod (7), the distances among different groups of side end positioning blocks (6) are adjusted and controlled, and the clamping of the oil cylinder to be tested is completed;
step 4, the pedestal (5) is slidably mounted on the bottom plate (1) through the limit sliding block (501) and the limit sliding groove (101), the cylinder to be tested is positioned under the pressure test block (4), and then the limit rotating block (102) is rotated to fix the cylinder to be tested and the pedestal (5);
and 5, when the first oil cylinder to be tested is subjected to pressure test, installing and fixing a second oil cylinder to be tested on the second pedestal (5), rotating the limiting rotating block (102) after the pressure test of the first oil cylinder to be tested is completed, directly sliding and removing the first pedestal (5) and the oil cylinder to be tested, and sliding and installing the second pedestal (5) and the second oil cylinder to be tested to wait for a second group of pressure test.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150006155A (en) * | 2013-07-08 | 2015-01-16 | 한국기계연구원 | Performance testing device for cylinder |
| CN113530925A (en) * | 2021-07-14 | 2021-10-22 | 武汉德创天成科技发展有限公司 | Hydraulic cylinder friction force testing device in hydraulic equipment and testing method thereof |
| CN114412879A (en) * | 2022-03-28 | 2022-04-29 | 徐州耐克盾机械制造有限公司 | Hydraulic cylinder fatigue performance test equipment and test method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150006155A (en) * | 2013-07-08 | 2015-01-16 | 한국기계연구원 | Performance testing device for cylinder |
| CN113530925A (en) * | 2021-07-14 | 2021-10-22 | 武汉德创天成科技发展有限公司 | Hydraulic cylinder friction force testing device in hydraulic equipment and testing method thereof |
| CN114412879A (en) * | 2022-03-28 | 2022-04-29 | 徐州耐克盾机械制造有限公司 | Hydraulic cylinder fatigue performance test equipment and test method |
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| 王孝聪, 王增豪, 沈永鹤: "小通径电磁流量计泄漏测试密封夹具设计", 机械制造, vol. 41, no. 7, pages 54 - 56 * |
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