CN115217817A - Hydraulic cylinder balance test system and test method - Google Patents
Hydraulic cylinder balance test system and test method Download PDFInfo
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- CN115217817A CN115217817A CN202211140066.1A CN202211140066A CN115217817A CN 115217817 A CN115217817 A CN 115217817A CN 202211140066 A CN202211140066 A CN 202211140066A CN 115217817 A CN115217817 A CN 115217817A
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- 238000012360 testing method Methods 0.000 title claims abstract description 89
- 238000010998 test method Methods 0.000 title claims abstract description 11
- 238000006073 displacement reaction Methods 0.000 claims abstract description 121
- 230000003068 static effect Effects 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000012430 stability testing Methods 0.000 claims abstract description 6
- 238000005303 weighing Methods 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 3
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- 238000013112 stability test Methods 0.000 description 4
- 101100383791 Petunia hybrida CHSG gene Proteins 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
Abstract
The utility model provides a pneumatic cylinder balance test system and test method, relates to pneumatic cylinder dynamic balance nature test technical field, including test base, electronic slip table, pneumatic cylinder connecting device and piston rod stability testing arrangement, the track fixed mounting of electronic slip table is at the upper surface of test base, and the pneumatic cylinder passes through pneumatic cylinder connecting device to be connected on the slider of electronic slip table to follow the slider removal, piston rod stability testing arrangement includes skew test unit, treater and display screen, the skew test unit includes cylinder body connecting plate, supplementary measuring board, straight line slip table, piston rod connecting rod, longitudinal displacement distance measuring sensor, lateral displacement measurement connecting plate and lateral displacement distance measuring sensor. The invention can realize the balance test of the hydraulic cylinder under the static state, the dynamic state and the load state, can accurately display the offset in a quantification way, has accurate test result and safe and reliable test process.
Description
Technical Field
The invention relates to the technical field of dynamic balance test of hydraulic cylinders, in particular to a balance test system and a balance test method of a hydraulic cylinder.
Background
The hydraulic cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and makes linear reciprocating motion. It has simple structure and reliable operation. When it is used to implement reciprocating motion, it can omit speed-reducing device, and has no transmission gap, and its motion is stable, so that it can be extensively used in various mechanical hydraulic systems. The output force of the hydraulic cylinder is in direct proportion to the effective area of the piston and the pressure difference between the two sides of the effective area; the hydraulic cylinder is basically composed of a cylinder barrel and a cylinder cover, a piston and a piston rod, a sealing device, a buffering device and an exhaust device.
The performance of the hydraulic cylinder is directly related to the overall performance of the equipment, and particularly under application scenes with high precision requirements, if a piston rod has large deviation in the process of carrying out specified precision stroke control on a load, the running precision of the equipment is greatly reduced.
Because the length of the piston rod of the hydraulic cylinder is much larger than the diameter of the piston rod, before the hydraulic cylinder leaves a factory, the bending strength and the stability of the piston rod in the longitudinal direction and the radial direction need to be tested and checked respectively under the static state and the dynamic state of the piston rod.
At present, the hydraulic cylinder can carry out a pressure maintaining test on a hydraulic cylinder test bed when leaving a factory, the pressure maintaining test is used for testing the air tightness of the hydraulic cylinder in a static state, and the stability of a piston rod is not tested.
Therefore, it is an urgent technical problem to be solved to develop a system suitable for testing static and dynamic balance of hydraulic cylinders with different cylinder diameters and different strokes.
Disclosure of Invention
The invention provides a hydraulic cylinder balance test system and a test method, aiming at solving the technical problem of carrying out static and dynamic balance tests on hydraulic cylinders with different cylinder diameters and different strokes. The following technical scheme is adopted:
a hydraulic cylinder balance test system comprises a test base, an electric sliding table, a hydraulic cylinder connecting device and a piston rod stability test device, wherein a track of the electric sliding table is fixedly arranged on the upper surface of the test base, a hydraulic cylinder is connected to a sliding block of the electric sliding table through the hydraulic cylinder connecting device and moves along with the sliding block, the piston rod stability test device comprises an offset test unit, a processor and a display screen, the offset test unit comprises a cylinder body connecting plate, an auxiliary measuring plate, a linear sliding table, a piston rod connecting rod, a longitudinal displacement distance measuring sensor, a transverse displacement measuring connecting plate and a transverse displacement distance measuring sensor, the cylinder body connecting plate is fixed at the cylinder body end face of the hydraulic cylinder through a fastener, the auxiliary measuring plate is a right-angle L-shaped plate, the inner sides of the two sides are bonded on the outer wall of a piston rod of the hydraulic cylinder, and the two sides are in a horizontal state, the another side is in vertical state, the orbital one end fixed mounting of sharp slip table is on the cylinder body connecting plate, the one end of piston rod connecting rod is installed on the slider of sharp slip table to follow the slider and remove, other end overlap joint is at the terminal surface of pneumatic cylinder piston rod, longitudinal displacement ranging sensor's casing is installed on the slider of sharp slip table, and the sensing head is in the central point of the upper surface on one side of horizontal state towards supplementary measuring plate, transverse displacement measuring connection board is the L template, connects on the slider of sharp slip table through the fastener on one side, and follows the slider and remove, and the another side is located the outside on one side that supplementary measuring plate is in vertical state, transverse displacement ranging sensor's casing is installed on supplementary measuring plate, and the sensing head is in the central point on one side of vertical state towards supplementary measuring plate, the treater respectively with longitudinal displacement ranging sensor, the transverse displacement distance measuring sensor is electrically connected with the display screen in a communication way.
According to the technical scheme, when the balance test of the hydraulic cylinder is needed, the hydraulic cylinder is firstly installed on the hydraulic cylinder connecting device, the processor records the measured values of the longitudinal displacement distance measuring sensor and the transverse displacement distance measuring sensor respectively in the initial state, the piston rod of the hydraulic cylinder is operated to extend completely, the piston rod of the hydraulic cylinder can push the piston rod connecting rod forwards by the same displacement amount, the processor records the measured values of the longitudinal displacement distance measuring sensor and the transverse displacement distance measuring sensor again at the moment, the point recorded at the moment can be considered to be the same as the point recorded in the initial state, the piston rod is not interfered by the piston rod connecting rod when the piston rod displaces due to the fact that the piston rod connecting rod is in lap joint with the piston rod head, the offset measurement is more accurate, the auxiliary measuring plate is a right-angle L-shaped plate, two edges of the hydraulic cylinder piston rod are tangent, the measured values of the longitudinal displacement distance measuring sensor and the transverse displacement measuring sensor are guaranteed to represent the offset value of the piston rod, the processor can calculate the two recorded values to obtain the offset of the completely extending state of the piston rod of the hydraulic cylinder, the smaller the horizontal displacement amount represents the balance of the hydraulic cylinder, otherwise, and the better the display of the final processor, and the better the record of testers is convenient.
Optionally, the device further comprises a load state testing device, the load state testing device comprises a baffle plate, a weighing sensor and a load plate, a sensor mounting groove is formed in one side of the baffle plate, the bottom of the baffle plate is fixed at the end of the testing base through a fastening piece, the base of the weighing sensor is fixedly mounted at the bottom of the sensor mounting groove and is electrically connected with the processor in a communication mode, and the load plate is mounted on the sensing surface of the weighing sensor.
Through the technical scheme, the baffle plate is arranged to provide a reliable limiting point for the hydraulic cylinder piston rod, when the hydraulic cylinder piston rod extends out, the baffle plate can be supported on a load plate, and the test of the offset of the piston rod is carried out under the state of simulating a load.
Optionally, pneumatic cylinder connecting device includes slider connecting plate, pneumatic cylinder mounting base, front seat board and back bedplate, the slider connecting plate passes through the fastener and installs on the slider of electronic slip table to follow the slider and remove, pneumatic cylinder mounting base top is equipped with the pneumatic cylinder mounting groove, be equipped with a set of screw hole in the pneumatic cylinder mounting groove, front seat board and back bedplate all are L type pneumatic cylinder mounting panel, and one side of front seat board passes through the fastener assembly in screw hole department, and the another side passes through the fastener assembly in the cylinder body department of pneumatic cylinder, and one side of back bedplate passes through the fastener assembly in screw hole department, and the another side passes through the rear end cylinder body department of fastener assembly at the pneumatic cylinder.
Through above-mentioned technical scheme, pneumatic cylinder mounting base sets up the pneumatic cylinder mounting groove, installs the pneumatic cylinder in the pneumatic cylinder mounting groove, makes its latter half cylinder body be located the pneumatic cylinder mounting groove, when carrying out the load condition test, avoids the fastener risk of droing that pressure too big leads to.
Optionally, the locking device comprises a front locking plate, a rear locking plate and a group of locking bolts, one end of the front locking plate and one end of the rear locking plate are fixedly mounted on the upper surface of the sliding block connecting plate respectively through fasteners, the other end of the front locking plate and the other end of the rear locking plate are respectively provided with a locking threaded hole which is respectively 1-2mm away from the track surface of the electric sliding table and respectively located at the front end and the rear end of the hydraulic cylinder, the group of locking bolts are respectively assembled at the locking threaded holes of the front locking plate and the rear locking plate, and the displacement of the sliding block of the electric sliding table is limited when the group of locking bolts are respectively locked.
Through above-mentioned technical scheme, when carrying out static test and load test, need will organize locking bolt and lock respectively, because the locking device spacing ability of electronic slip table self-band is limited, adopts the locking device of mechanical type, can satisfy the equilibrium test demand of big cylinder diameter pneumatic cylinder.
Optionally, the depth of the hydraulic cylinder mounting groove is 5-20mm, and when the hydraulic cylinder is mounted, the tail end face of the hydraulic cylinder abuts against the inner wall of the hydraulic cylinder mounting groove.
Through the technical scheme, the tail end face of the hydraulic cylinder is abutted to the inner wall of the hydraulic cylinder mounting groove, so that the hydraulic cylinder is safer and more reliable during heavy load testing.
Optionally, still include the controller, the controller includes electronic slip table controller and hydrovalve control switch, electronic slip table controller is connected with electronic slip table control electricity, and the hydraulic pressure station passes through electromagnetic hydraulic valve and the inlet and the liquid outlet intercommunication of pneumatic cylinder, the execution action and the stroke of hydraulic valve control pneumatic cylinder are passed through to the hydrovalve control switch.
Through the technical scheme, the electric sliding table controller can realize accurate control on starting, stopping, advancing direction and advancing speed of the electric sliding table, and the hydraulic valve control switch can control the extending, retracting and traveling of the piston rod of the hydraulic cylinder through the electromagnetic hydraulic valve.
Optionally, the intelligent alarm further comprises an alarm, and the processor controls the switch of the alarm.
Through the technical scheme, the maximum threshold values of the longitudinal offset and the transverse offset can be respectively and correspondingly set according to the specification of the tested hydraulic cylinder, when any one of the longitudinal offset or the transverse offset obtained by calculation of the processor is larger than the corresponding maximum threshold value, the processor controls the alarm to start alarming, the worker is reminded to stop testing, the safety risk is reduced, and meanwhile, the balance of the hydraulic cylinder is determined to be unqualified.
Optionally, the processor is a single chip microcomputer or a PLC controller, and the longitudinal displacement distance measuring sensor and the transverse displacement distance measuring sensor are both infrared distance measuring sensors.
Through the technical scheme, the single chip microcomputer or the PLC can read the measured value of the infrared distance measuring sensor and calculate the offset.
A balance test method for a hydraulic cylinder comprises the following steps:
step 1, performing static no-load test, respectively locking a group of locking bolts, recording a measured value of a longitudinal displacement distance measuring sensor in an initial state as y1 by a processor, recording a measured value of a transverse displacement distance measuring sensor as x1, operating a hydraulic valve control switch to control a piston rod of a hydraulic cylinder to completely extend out, the processor records the measured value of the longitudinal displacement distance measuring sensor at the moment and records the measured value as y2, records the measured value of the transverse displacement distance measuring sensor and records the measured value as x2, calculates a static longitudinal offset Oy = | -y 2-y1 |, calculates a static transverse offset Ox = | -x 2-x1 |, and controls the display screen to display the Oy value and the Ox value;
step 3, carrying out load test, operating the electric sliding table controller, controlling the sliding block of the electric sliding table to move, ensuring that the distance between the piston rod head of the hydraulic cylinder and the surface of the load plate is less than 10-20mm of the maximum stroke of the hydraulic cylinder, respectively locking a group of locking bolts, recording the measured value of the longitudinal displacement distance measuring sensor in the initial state by the processor as y5, recording the measured value of the transverse displacement distance measuring sensor as x5, operating a hydraulic valve control switch, controlling the piston rod of the hydraulic cylinder to stretch out and abut against the surface of the load plate, the method comprises the steps of operating a hydraulic valve control switch to continuously pressurize to ensure that a hydraulic cylinder is in a maximum working pressure state, recording a measured value m of a weighing sensor at the moment by a processor, recording a measured value y6 of a longitudinal displacement distance measuring sensor at the moment by the processor, recording a measured value x6 of a transverse displacement distance measuring sensor at the moment by the processor, calculating static longitudinal offset Ly = | -y 6-y5 |, calculating static transverse offset Lx = | -x 6-x5 |, and controlling a display screen to display the value m, the value Ly and the value Lx by the processor.
By the technical scheme, the balance test of the hydraulic cylinder in a static no-load state, the balance test of the hydraulic cylinder in a dynamic no-load state and the balance test of the hydraulic cylinder in a simulated load state can be accurately and quickly realized.
In summary, the invention includes at least one of the following beneficial technical effects:
the invention can provide a hydraulic cylinder balance test system and a test method, can realize the balance test of the hydraulic cylinder under static, dynamic and load states, can accurately display the offset in a quantification way, and has accurate test result and safe and reliable test process.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic top view of the structure of FIG. 1;
FIG. 3 isbase:Sub>A schematic view of the cross-sectional A-A structure of FIG. 1;
FIG. 4 is a partially enlarged structural view of the area B of FIG. 1;
FIG. 5 is a schematic view of a partial method of the region C of FIG. 2;
FIG. 6 is a schematic diagram of the electrical device connection of the piston rod stability testing apparatus of the present invention;
fig. 7 is a schematic view of the assembly of the front and rear seat pans of the present invention with hydraulic cylinders.
Description of reference numerals: 1. testing the base; 2. an electric sliding table; 31. a slider connecting plate; 32. a hydraulic cylinder mounting base; 321. a hydraulic cylinder mounting groove; 33. a front seat plate; 34. a rear seat plate; 35. a front locking plate; 36. a rear locking plate; 37. locking the bolt; 4. a piston rod stability testing device; 41. a cylinder connecting plate; 42. an auxiliary measuring plate; 43. a linear sliding table; 44. a piston rod connecting rod; 45. a longitudinal displacement ranging sensor; 46. a transverse displacement measuring connection plate; 47. a lateral displacement distance measuring sensor; 5. a processor; 51. a baffle plate; 52. a weighing sensor; 53. a load board; 6. a display screen; 61. an electric slipway controller; 62. a hydraulic valve control switch; 64. an alarm; 100. and a hydraulic cylinder.
Detailed Description
The present invention is described in further detail below with reference to fig. 1-7.
The embodiment of the invention discloses a hydraulic cylinder balance test system and a test method.
Referring to fig. 1-7, a hydraulic cylinder balance test system, which comprises a test base 1, an electric sliding table 2, a hydraulic cylinder connecting device and a piston rod stability test device 4, wherein a track of the electric sliding table 2 is fixedly installed on the upper surface of the test base 1, a hydraulic cylinder 100 is connected to a sliding block of the electric sliding table 2 through the hydraulic cylinder connecting device and moves along with the sliding block, the piston rod stability test device 4 comprises a deviation test unit, a processor 5 and a display screen 6, the deviation test unit comprises a cylinder body connecting plate 41, an auxiliary measuring plate 42, a linear sliding table 43, a piston rod connecting rod 44, a longitudinal displacement distance measuring sensor 45, a transverse displacement measuring connecting plate 46 and a transverse displacement distance measuring sensor 47, the cylinder body connecting plate 41 is fixed at the end face of the hydraulic cylinder 100 through a fastener, the auxiliary measuring plate 42 is a right-angle L-shaped plate, and the inner sides are bonded to the outer wall of the piston rod of the hydraulic cylinder 100, one side is in a horizontal state, the other side is in a vertical state, one end of a track of the linear sliding table 43 is fixedly arranged on the cylinder body connecting plate 41, one end of a piston rod connecting rod 44 is arranged on a slide block of the linear sliding table 43 and moves along with the slide block, the other end of the piston rod connecting rod is lapped on the end surface of a piston rod of the hydraulic cylinder 100, a shell of a longitudinal displacement distance measuring sensor 45 is arranged on the slide block of the linear sliding table 43, a sensing head faces the central point of the upper surface of one side of the auxiliary measuring plate 42 in the horizontal state, the transverse displacement measuring connecting plate 46 is an L-shaped plate, one side of the transverse displacement measuring connecting plate is connected on the slide block of the linear sliding table 43 through a fastener and moves along with the slide block, the other side of the auxiliary measuring plate 42 is positioned at the outer side of the vertical state, a shell of the transverse displacement distance measuring sensor 47 is arranged on the auxiliary measuring plate 42, the sensing head faces the central point of one side of the auxiliary measuring plate 42 in the vertical state, the processor 5 is respectively in communication and electrical connection with the longitudinal displacement distance measuring sensor 45, the transverse displacement distance measuring sensor 47 and the display screen 6.
When the balance test of the hydraulic cylinder 100 is needed, the hydraulic cylinder 100 is firstly installed on a hydraulic cylinder connecting device, the processor 5 records the measured values of the longitudinal displacement distance measuring sensor 45 and the transverse displacement distance measuring sensor 47 respectively in an initial state, then the piston rod of the hydraulic cylinder 100 is operated to be completely extended, the piston rod of the hydraulic cylinder 100 can push the piston rod connecting rod 44 forwards by the same displacement amount, at the moment, the processor 5 records the measured values of the longitudinal displacement distance measuring sensor 45 and the transverse displacement distance measuring sensor 47 again, the point recorded at the moment can be considered to be the same as the point recorded in the initial state, because the piston rod connecting rod 44 is in lap joint with the piston rod head, the piston rod is not interfered by the piston rod connecting rod 44 when the piston rod is displaced, the displacement measurement is more accurate, the auxiliary measuring plate 42 is a right-angle L-shaped plate, two sides are tangent to the piston rod of the hydraulic cylinder 100, the measured values of the longitudinal displacement distance measuring sensor 45 and the transverse displacement distance measuring sensor 47 are ensured to represent the offset value of the piston rod, the processor 5 can calculate the twice recorded values to obtain the offset of the completely extended state of the piston rod of the hydraulic cylinder 100, the smaller the sliding amount represents the better the balance of the hydraulic cylinder 100, otherwise, the worse the balance, the processor 5 is convenient for displaying 6, and the tester to display the offset.
The test device further comprises a load state testing device, the load state testing device comprises a baffle plate 51, a weighing sensor 52 and a load plate 53, a sensor mounting groove is formed in one side of the baffle plate 51, the bottom of the baffle plate 51 is fixed to the end portion of the test base 1 through a fastener, the base of the weighing sensor 52 is fixedly mounted at the bottom of the sensor mounting groove and is in communication and electric connection with the processor 5, and the load plate 53 is mounted on a sensing surface of the weighing sensor 52.
The arrangement of the baffle plate 51 provides a reliable limiting point for the piston rod of the hydraulic cylinder 100, and when the piston rod of the hydraulic cylinder 100 extends out, the baffle plate can be abutted against the load plate 53, so that the test of the offset of the piston rod can be carried out under the simulated load state.
The hydraulic cylinder connecting device comprises a sliding block connecting plate 31, a hydraulic cylinder mounting base 32, a front seat plate 33 and a rear seat plate 34, the sliding block connecting plate 31 is mounted on a sliding block of the electric sliding table 2 through a fastener and moves along with the sliding block, a hydraulic cylinder mounting groove 321 is arranged at the top of the hydraulic cylinder mounting base 32, a group of threaded holes are formed in the hydraulic cylinder mounting groove 321, the front seat plate 33 and the rear seat plate 34 are L-shaped hydraulic cylinder mounting plates, one side of the front seat plate 33 is assembled at the threaded holes through the fastener, the other side of the front seat plate is assembled at a cylinder body of the hydraulic cylinder 100 through the fastener, one side of the rear seat plate 34 is assembled at the threaded holes through the fastener, and the other side of the rear seat plate is assembled at the rear end cylinder body of the hydraulic cylinder 100 through the fastener.
Pneumatic cylinder mounting base 32 sets up pneumatic cylinder mounting groove 321, installs pneumatic cylinder 100 in pneumatic cylinder mounting groove 321, makes its the latter half cylinder body be located pneumatic cylinder mounting groove 321, when carrying out the load condition test, avoids the too big fastener risk of droing that leads to of pressure.
The locking device comprises a front locking plate 35, a rear locking plate 36 and a group of locking bolts 37, one end of the front locking plate 35 and one end of the rear locking plate 36 are fixedly mounted on the upper surface of the sliding block connecting plate 31 through fasteners respectively, locking threaded holes are formed in the other end of the front locking plate 35 and the other end of the rear locking plate 36 respectively and are 1-2mm away from the rail surface of the electric sliding table 2 and located at the front end and the rear end of the hydraulic cylinder 100 respectively, the group of locking bolts 37 are assembled in the locking threaded holes of the front locking plate 35 and the rear locking plate 36 respectively, and displacement of the sliding block of the electric sliding table 2 is limited when the group of locking bolts 37 are locked respectively.
When carrying out static test and load test, need lock bolt 37 with group and lock respectively, because the locking device spacing ability of electronic slip table 2 self-band is limited, adopts the locking device of mechanical type, can satisfy the equilibrium test demand of big cylinder diameter hydraulic cylinder.
Optionally, the depth of the hydraulic cylinder mounting groove 321 is 5-20mm, and when the hydraulic cylinder 100 is completely mounted, the tail end face of the hydraulic cylinder 100 abuts against the inner wall of the hydraulic cylinder mounting groove 321.
The tail end face of the hydraulic cylinder 100 abuts against the inner wall of the hydraulic cylinder mounting groove 321, and therefore the large-load test is safer and more reliable.
The hydraulic control system is characterized by further comprising a controller, wherein the controller comprises an electric sliding table controller 61 and a hydraulic valve control switch 62, the electric sliding table controller 61 is electrically connected with the electric sliding table 2 in a control mode, the hydraulic station is communicated with a liquid inlet and a liquid outlet of the hydraulic cylinder 100 through an electromagnetic hydraulic valve, and the hydraulic valve control switch 62 controls the execution action and the stroke of the hydraulic cylinder 100 through the electromagnetic hydraulic valve.
The electric slipway controller 61 can realize the accurate control of the starting, stopping, advancing direction and advancing speed of the electric slipway 2, and the hydraulic valve control switch 62 can control the extending, retracting and stroke of the piston rod of the hydraulic cylinder 100 through an electromagnetic hydraulic valve.
An alarm 64 is also included, and the processor 5 controls the on and off of the alarm 64.
The maximum threshold values of the longitudinal offset and the transverse offset can be respectively and correspondingly set according to the specification of the tested hydraulic cylinder 100, when any one of the longitudinal offset or the transverse offset calculated by the processor 5 is larger than the corresponding maximum threshold value, the processor 5 controls the alarm 64 to start an alarm to remind a worker to stop testing, the safety risk is reduced, and meanwhile, the balance of the hydraulic cylinder 100 is determined to be unqualified.
The processor 5 is a single chip microcomputer or a PLC controller, and the longitudinal displacement distance measuring sensor 45 and the transverse displacement distance measuring sensor 47 are infrared distance measuring sensors.
The single chip microcomputer or the PLC can read the measured value of the infrared distance measuring sensor and calculate the offset.
A balance test method for a hydraulic cylinder comprises the following steps:
step 1, performing static no-load test, respectively locking a group of locking bolts 37, recording a measured value of a longitudinal displacement distance measuring sensor 45 in an initial state by a processor 5, recording the measured value of a transverse displacement distance measuring sensor 47, recording the measured value of the transverse displacement distance measuring sensor as y1, recording the measured value of the transverse displacement distance measuring sensor 47 as x1, operating a hydraulic valve control switch 62, controlling the piston rod of a hydraulic cylinder 100 to be completely extended, recording the measured value of the longitudinal displacement distance measuring sensor 45 at the moment by the processor 5, recording the measured value of the transverse displacement distance measuring sensor 47 as y2, recording the measured value of the transverse displacement distance measuring sensor 47 as x2, calculating a static longitudinal offset Oy = |, calculating a static transverse offset Ox = | _ x2-x1 |, and controlling a display screen 6 to display the Oy value and the Ox value by the processor 5;
step 3, load testing, operating the electric sliding table controller 61, controlling the sliding block of the electric sliding table 2 to move, ensuring that the distance between the piston rod head of the hydraulic cylinder 100 and the surface of the load plate 53 is less than 10-20mm of the maximum stroke of the hydraulic cylinder 100, respectively locking a group of locking bolts 37, recording the measured value of the longitudinal displacement distance measuring sensor 45 in the initial state by the processor 5 as y5, recording the measured value of the transverse displacement distance measuring sensor 47 as x5, operating the hydraulic valve control switch 62, controlling the piston rod of the hydraulic cylinder 100 to extend out, the hydraulic valve control switch 62 is operated to continuously pressurize against the surface of the load plate 53 to ensure that the hydraulic cylinder 100 is in the maximum working pressure state, the processor 5 records the measured value m of the load cell 52 at the moment, the processor 5 records the measured value of the longitudinal displacement distance measuring sensor 45 at the moment as y6, records the measured value of the transverse displacement distance measuring sensor as x6, calculates the static longitudinal offset Ly = | -y 6-y5 |, calculates the static transverse offset Lx = | -x 6-x5 |, and controls the display screen to display the value m, the value Ly and the value Lx.
The balance test of the hydraulic cylinder 100 in the static no-load state, the balance test of the hydraulic cylinder 100 in the dynamic no-load state, and the balance test of the hydraulic cylinder 100 in the simulated load state can be accurately and quickly realized.
The implementation principle of the balance test system and the test method of the hydraulic cylinder in the embodiment of the invention is as follows:
the balance test is carried out on the CHSG type hydraulic cylinder of SMC company, the diameter of a piston rod is 22mm, the maximum nominal pressure is 16MPa, the maximum stroke is 500mm, and the theoretical output force of the maximum stroke is 4000N; the maximum longitudinal offset of the static unloaded state is 0.4mm, and the maximum transverse offset of the static unloaded state is 0.3mm; the maximum longitudinal offset in a dynamic no-load state is 0.5mm, and the maximum static transverse offset is 0.4mm; the maximum load state longitudinal maximum offset is 0.6mm, and the static transverse maximum offset is 0.5mm;
the static no-load test is carried out, a group of locking bolts 37 are respectively locked, the processor 5 records the measured value of the longitudinal displacement distance measuring sensor 45 in the initial state and is recorded as 100mm, the measured value of the transverse displacement distance measuring sensor 47 and is recorded as 50mm, the hydraulic valve control switch 62 is operated, the piston rod of the hydraulic cylinder 100 is controlled to be fully extended, the processor 5 records the measured value of the longitudinal displacement distance measuring sensor 45 at the moment and is recorded as 100.23mm, the measured value of the transverse displacement distance measuring sensor 47 and is recorded as 49.92mm, the processor 5 calculates the static longitudinal offset Ly = |, calculates the static transverse offset Lx = |, x6-x5 |, and the processor 5 controls the display screen 6 to display the value of Oy and the value of Ox which are both in the qualified range;
the dynamic no-load test is carried out, a group of locking bolts 37 are respectively loosened, the electric sliding table controller 61 is operated, the sliding block of the electric sliding table 2 is controlled to move at the speed of 5mm/s, the processor 5 records the measured value of the longitudinal displacement distance measuring sensor 45 in the initial state and records the measured value as 100mm, the measured value of the transverse displacement distance measuring sensor 47 and records the measured value as 50mm, the piston rod of the hydraulic cylinder 100 is controlled to be completely extended in the moving process, the processor 5 records the measured value of the longitudinal displacement distance measuring sensor 45 at the moment and records the measured value as 100.27mm, the measured value of the transverse displacement distance measuring sensor 47 and records the measured value as 49.88mm, the processor 5 calculates the dynamic longitudinal displacement Ty =0.27mm, calculates the dynamic transverse displacement Tx =0.12mm, and the processor 5 controls the display screen 6 to display the Ty value and the Tx value which are both in the qualified range;
and (3) a load test is carried out, the electric sliding table controller 61 is operated to control the sliding block of the electric sliding table 2 to move, the distance between the piston rod head of the hydraulic cylinder 100 and the surface of the load plate 53 is ensured to be less than 10mm of the maximum stroke of the hydraulic cylinder 100, a group of locking bolts 37 are respectively locked, the processor 5 records the measured value of the longitudinal displacement distance measuring sensor 45 in the initial state as 100mm, the measured value of the transverse displacement distance measuring sensor 47 as 50mm, the hydraulic valve control switch 62 is operated to control the piston rod of the hydraulic cylinder 100 to extend to abut against the surface of the load plate 53, the hydraulic valve control switch 62 is operated to continuously pressurize, the hydraulic cylinder 100 is ensured to be in the state of 4000N maximum working pressure, the processor 5 records the measured value m =3995N of the weighing sensor 52 at the moment, the processor 5 records the measured value of the longitudinal displacement distance measuring sensor 45 as 100.48mm, records the measured value of the transverse displacement distance measuring sensor 47 as 49.68mm, the processor 5 calculates the static longitudinal displacement Ly =0.48mm, calculates the static transverse displacement Lx =0.32mm, and is qualified.
The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (9)
1. The utility model provides a hydraulic cylinder balance test system which characterized in that: including test base (1), electronic slip table (2), pneumatic cylinder connecting device and piston rod stability testing arrangement (4), the track fixed mounting of electronic slip table (2) is at the upper surface of test base (1), and pneumatic cylinder (100) are connected on the slider of electronic slip table (2) through pneumatic cylinder connecting device to follow the slider and remove, piston rod stability testing arrangement (4) are including skew test unit, treater (5) and display screen (6), the skew test unit includes cylinder body connecting plate (41), supplementary measuring plate (42), sharp slip table (43), piston rod connecting rod (44), longitudinal displacement distance measuring sensor (45), transverse displacement measuring connecting plate (46) and transverse displacement distance measuring sensor (47), cylinder body connecting plate (41) are fixed in the cylinder body terminal surface department of pneumatic cylinder (100) through the fastener, supplementary measuring plate (42) are right angle L template, and the inboard bonding on both sides is on the outer wall of pneumatic cylinder (100) piston rod, and on one side is in the horizontal state, the another side is in vertical state, the orbital one end fixed mounting of sharp slip table (43) is on cylinder body connecting plate (41), the one end of piston rod (44) is installed on the slider of straight line slip table (43), and the slider longitudinal displacement sensor (45) is installed on the slider of the slider and the slider of the slider (43) is followed the longitudinal displacement measuring sensor (100) and the displacement measuring sensor (45) is at the longitudinal displacement measuring cylinder body terminal surface of the slider of pneumatic cylinder (100) on the slider shell, the slider of the slider (45) on the slider of the slider and the slider of the longitudinal displacement measuring sensor (6) on the slider of the slider On the piece, sensing head is in the central point of the upper surface on one side of the horizontal state towards supplementary measuring board (42), lateral displacement measures connecting plate (46) and is the L template, connects on the slider of sharp slip table (43) through the fastener on one side to follow the slider and remove, and the another side is located supplementary measuring board (42) and is in the outside on one side of vertical state, the casing of lateral displacement range sensor (47) is installed on supplementary measuring board (42), and sensing head is in the central point on one side of vertical state towards supplementary measuring board (42), treater (5) are connected with longitudinal displacement range sensor (45), lateral displacement range sensor (47) and display screen (6) communication electricity respectively.
2. The system of claim 1, wherein: still include load condition testing arrangement, load condition testing arrangement includes baffle (51), weighing sensor (52) and load board (53), one side of baffle (51) is equipped with the sensor mounting groove, and the tip at test base (1) is fixed through the fastener in the bottom of baffle (51), the base fixed mounting of weighing sensor (52) is in the bottom of sensor mounting groove to be connected with treater (5) communication electricity, load board (53) are installed on the sensing face of weighing sensor (52).
3. The system of claim 1, wherein: the hydraulic cylinder connecting device comprises a slider connecting plate (31), a hydraulic cylinder mounting base (32), a front seat plate (33) and a rear seat plate (34), wherein the slider connecting plate (31) is mounted on a slider of the electric sliding table (2) through a fastener and moves along with the slider, a hydraulic cylinder mounting groove (321) is formed in the top of the hydraulic cylinder mounting base (32), a group of threaded holes are formed in the hydraulic cylinder mounting groove (321), the front seat plate (33) and the rear seat plate (34) are L-shaped hydraulic cylinder mounting plates, one side of the front seat plate (33) is assembled at the threaded holes through the fastener, the other side of the front seat plate is assembled at the cylinder body of the hydraulic cylinder (100) through the fastener, one side of the rear seat plate (34) is assembled at the threaded holes through the fastener, and the other side of the rear seat plate is assembled at the rear end cylinder body of the hydraulic cylinder (100) through the fastener.
4. A hydraulic cylinder balance test system according to claim 3, wherein: still include locking device, locking device locks board (35), back locking plate (36) and a set of locking bolt (37) including the front, preceding locking plate (35) and back locking plate (36) one end are respectively through fastener fixed mounting at the upper surface of slider connecting plate (31), and the other end is equipped with the locking screw hole respectively, and the track face 1-2mm department apart from electronic slip table (2) respectively to be located both ends around pneumatic cylinder (100) respectively, the locking screw hole department of locking plate (35) and back locking plate (36) in the front is assembled respectively in a set of locking bolt (37), and the displacement of restriction electronic slip table (2) slider when a set of locking bolt (37) locks respectively.
5. A hydraulic cylinder balance test system according to claim 3, wherein: the depth of the hydraulic cylinder mounting groove (321) is 5-20mm, and when the hydraulic cylinder (100) is mounted, the tail end surface of the hydraulic cylinder (100) is abutted against the inner wall of the hydraulic cylinder mounting groove (321).
6. The system of claim 1, wherein: the hydraulic control system is characterized by further comprising a controller, the controller comprises an electric sliding table controller (61) and a hydraulic valve control switch (62), the electric sliding table controller (61) is electrically connected with the electric sliding table (2) in a control mode, the hydraulic station is communicated with a liquid inlet and a liquid outlet of the hydraulic cylinder (100) through an electromagnetic hydraulic valve, and the hydraulic valve control switch (62) controls the execution action and the stroke of the hydraulic cylinder (100) through the electromagnetic hydraulic valve.
7. The system of claim 1, wherein: the intelligent alarm device further comprises an alarm (64), and the processor (5) controls the switch of the alarm (64).
8. The system of claim 1, wherein: the processor (5) is a single chip microcomputer or a PLC controller, and the longitudinal displacement distance measuring sensor (45) and the transverse displacement distance measuring sensor (47) are both infrared distance measuring sensors.
9. A balance test method for a hydraulic cylinder is characterized by comprising the following steps:
step 1, performing static no-load test, respectively locking a group of locking bolts (37), recording a measured value of a longitudinal displacement distance measuring sensor (45) in an initial state by a processor (5) as y1, recording a measured value of a transverse displacement distance measuring sensor (47) as x1, operating a hydraulic valve control switch (62), controlling a piston rod of a hydraulic cylinder (100) to be fully extended, recording a measured value of the longitudinal displacement distance measuring sensor (45) at the moment as y2 by the processor (5), recording a measured value of the transverse displacement distance measuring sensor (47) as x2, calculating a static longitudinal offset Oy = | _ y2-y1 |, calculating a static transverse offset Ox = | _ x2-x1 |, and controlling a display screen (6) to display an Oy value and an Ox value by the processor (5);
step 2, performing dynamic no-load test, respectively loosening a group of locking bolts (37), operating an electric sliding table controller (61), controlling a sliding block of the electric sliding table (2) to move at a speed of 5-10mm/s, recording a measured value of a longitudinal displacement distance measuring sensor (45) in an initial state by a processor (5) as y3, recording a measured value of a transverse displacement distance measuring sensor (47) as x3, controlling a piston rod of a hydraulic cylinder (100) to be fully extended in the moving process, recording the measured value of the longitudinal displacement distance measuring sensor (45) at the moment as y4 by the processor (5), recording the measured value of the transverse displacement distance measuring sensor (47) as x4, calculating a dynamic longitudinal displacement Ty = y4-y3 |, calculating a dynamic transverse displacement Tx = x4-x3 |, and controlling a display screen (6) to display the Ty value and the Tx value by the processor (5);
and 3, carrying out load test, operating an electric sliding table controller (61), controlling the sliding block of the electric sliding table (2) to move, ensuring that the distance between the piston rod head of the hydraulic cylinder (100) and the surface of a load plate (53) is less than 10-20mm of the maximum stroke of the hydraulic cylinder (100), respectively locking a group of locking bolts (37), recording the measured value of a longitudinal displacement distance measuring sensor (45) in an initial state as y5, recording the measured value of a transverse displacement distance measuring sensor (47) as x5, operating a hydraulic valve control switch (62), controlling the piston rod of the hydraulic cylinder (100) to extend out to abut against the surface of the load plate (53), continuously pressurizing the hydraulic valve control switch (62) to ensure that the hydraulic cylinder (100) is in a maximum working pressure state, recording the measured value m of a weighing sensor (52) at the moment by the processor (5), recording the measured value of the longitudinal displacement distance measuring sensor (45) as y6, recording the measured value of the transverse displacement distance measuring sensor (47) as Lx 6, calculating the longitudinal displacement distance | y = | y | 5-5, and displaying a horizontal displacement offset value displayed by a static control screen (5).
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Denomination of invention: A hydraulic cylinder balance testing system and testing method Effective date of registration: 20230329 Granted publication date: 20221202 Pledgee: Shandong Zoucheng rural commercial bank Limited by Share Ltd. Pledgor: JINING LUWEI HYDRAULIC TECHNOLOGY CO.,LTD. Registration number: Y2023370000064 |
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Denomination of invention: A hydraulic cylinder balance testing system and testing method Granted publication date: 20221202 Pledgee: Shandong Zoucheng rural commercial bank Limited by Share Ltd. Pledgor: JINING LUWEI HYDRAULIC TECHNOLOGY CO.,LTD. Registration number: Y2024370000011 |