CN116773156A - Unbalanced load test experiment device suitable for hydraulic cylinder and sealing element - Google Patents
Unbalanced load test experiment device suitable for hydraulic cylinder and sealing element Download PDFInfo
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Abstract
The application discloses a unbalanced load experimental device suitable for a hydraulic cylinder and a sealing element. The device comprises a bottom plate, a driving module, a loading module and an experimental test part, wherein the driving module, the loading module and the experimental test part are arranged on the bottom plate; the driving module is connected with the end face of the piston rod of the experimental test part through the thrust sensor, the two loading modules are arranged on the experimental test part, and the two loading modules are distributed and connected with the peripheral faces of the two ends of the piston rod of the experimental test part; the driving module comprises a servo motor, a speed reducer, a transmission part, a guide rail sliding block and a movable connecting piece, the loading module comprises a hand wheel screw rod mechanism, a force sensor, a displacement sensor and a fixed plate, and the experimental test part comprises a piston, a cover plate and a cylinder barrel. The application can truly simulate the movement of the piston rod in the cylinder body, not only can realize the sealing condition of the piston rod under different eccentric loads, but also can measure the friction force under different eccentric and pressure states, and has the advantages of simple structure and convenient operation.
Description
Technical Field
The application belongs to an experimental device for testing the sealing reliability and the load characteristic of a hydraulic cylinder and a sealing element, and belongs to the field of hydraulic transmission control.
Background
The problem of leakage in hydraulic systems has been a key technical problem in the field of hydraulic transmission control, where leakage in hydraulic components is a major factor causing leakage in the system. In some situations with unbalanced load, for example, under the working condition of supergravity, the influence of the dead weight of a piston rod or a valve core of the hydraulic cylinder can be increased by hundreds of times, the influence of the dead weight of the piston rod or the valve core of the hydraulic cylinder is not negligible, and the unbalanced load causes larger lateral force to be generated between the relative moving parts of the hydraulic cylinder, the valve and the like, thereby seriously affecting the working performance and the service life. At present, the development of a supergravity centrifugal simulation device is faster and faster, the requirement on a hydraulic loading module under supergravity is also rapidly increased, the research on unbalanced load problems of a hydraulic cylinder or a valve and the like under the influence of dead weight is less, and the problem of the working characteristics of key parts of the hydraulic cylinder or the valve under the unbalanced load under the supergravity is needed to be solved, so that technical support is provided for the design of a supergravity hydraulic actuating element.
Disclosure of Invention
In order to solve the problems in the background technology, the application provides a unbalanced load test experimental device suitable for a hydraulic cylinder and a sealing element, and aims to solve the influence of the unbalanced load problem of the hydraulic cylinder and the sealing element on sealing performance and friction characteristics and reliability experimental research in the case of a supergravity unbalanced load working condition and similar engineering practice.
The application adopts the following scheme:
the application comprises a bottom plate, a driving module, a loading module and an experimental test part, wherein the driving module, the loading module and the experimental test part are arranged on the bottom plate; the driving module is connected with the end face of the piston rod of the experimental test part through the thrust sensor, the two loading modules are arranged on the experimental test part, and the two loading modules are distributed and connected with the peripheral faces of the two ends of the piston rod of the experimental test part.
The driving module comprises a servo motor, a speed reducer, a crankshaft, a connecting rod, a sliding plate, an adjusting nut, a movable linear bearing, a connecting piece, an adapter shaft and a sliding block guide rail; the output shaft of the servo motor is connected with one end of a crankshaft through a speed reducer, the crankshaft is horizontally arranged, the other end of the crankshaft is connected and supported on a bottom plate, the crankshaft is connected with one end of a connecting rod, the other end of the connecting rod is hinged with one end of a sliding plate through a first shaft, and the sliding plate is slidably connected and installed on a sliding block guide rail fixed on the bottom plate; the other end of the sliding plate is hinged with one end of the connecting piece through a movable linear bearing and an adjusting nut by a second shaft, the other end of the connecting piece is hinged with one end of the adapter piece by a third shaft, and the adapter shaft is arranged at the other end of the adapter piece.
One end of the switching shaft is arranged on the switching piece, and the other end of the switching shaft is used for being in contact and propped connection with one end face of a piston rod of the experimental test part through the thrust sensor.
The axial directions of the first shaft and the third shaft are parallel to each other, and the axial directions of the second shaft are perpendicular to the first shaft and the third shaft.
The connecting piece is connected with the sliding plate through a movable linear bearing, so that relative movement along the second axial direction is allowed between one end of the connecting piece and the other end of the sliding plate, and the position of the relative movement is regulated by limiting an adjusting nut.
The loading module mainly comprises a T-shaped supporting plate, a hand wheel screw mechanism, a sliding block guide rail mechanism, a switching assembly and a roller assembly, wherein the T-shaped supporting plate is fixedly arranged on an experimental testing part, the hand wheel screw mechanism and the sliding block guide rail mechanism are vertically fixed on the T-shaped supporting plate, the hand wheel screw mechanism and the sliding block guide rail mechanism are connected through the switching assembly, the switching assembly is connected with the roller assembly through a loading force sensor, the roller assembly is used for being connected to the circumferential surface of a piston rod of the experimental testing part, and a displacement sensor is arranged on the lateral side of the piston rod of the experimental testing part.
The hand wheel screw mechanism comprises a screw nut component and a hand wheel, the screw nut component comprises a screw and a nut which are mutually sleeved through threads, the screw is vertically arranged, two ends of the screw are hinged and arranged on a T-shaped supporting plate, the hand wheel is fixedly and coaxially connected with the upper end of the screw,
the sliding block guide rail mechanism comprises a sliding block and a guide rail, the guide rail is vertically fixed on the T-shaped support plate, and the sliding block is slidably arranged on the guide rail;
the switching assembly comprises an adapter plate, a guide linear bearing and a vertical shaft, wherein the nut of the hand wheel screw mechanism and the sliding block of the sliding block guide rail mechanism are fixedly connected through the adapter plate, the bottom surface of the adapter plate is fixedly connected with the upper end of the vertical shaft through a loading force sensor, and the lower end of the vertical shaft is connected with the roller assembly after penetrating through the T-shaped supporting plate through the guide linear bearing.
The roller assembly comprises a loading shaft, a side plate, a pin shaft and rollers; the upper end of the loading shaft is fixedly connected with the vertical shaft in a coaxial manner, two sides of the lower end are fixedly provided with side plates respectively, a horizontal pin shaft is connected between the side plates at two sides, and the idler wheel is movably sleeved on the pin shaft.
The experimental test part mainly comprises a cylinder body, a piston rod and end covers, wherein the piston rod is horizontally and axially movably arranged in the cylinder body, and the end covers are arranged at two ends of the cylinder body;
the two ends of the piston rod are provided with tangential planes parallel to the axial direction, and the roller of the roller assembly of the loading module is contacted with the tangential planes to apply eccentric load when the hydraulic cylinder works.
The seal may be a sealing ring.
Firstly, a handwheel of a handwheel screw mechanism in a loading module is regulated to enable a screw nut to drive an adapter plate to move downwards, so that a roller in a roller assembly is contacted with a piston rod to enable the piston rod to be eccentric, and the two loading modules are regulated and controlled through respective handwheels to realize equal eccentric values or different eccentric values at two ends of the tested piston rod so as to simulate the eccentric working condition of a hydraulic cylinder;
after the hand wheel is adjusted, the position of the movable linear bearing on the second shaft is adjusted through an adjusting nut, so that the axial direction of the switching shaft is consistent with the movement direction of the piston rod;
the driving module works to drive the adapter shaft to axially reciprocate so as to drive the piston rod to synchronously move for carrying out unbalanced load experiments;
in the test process, the oil pressure in the cylinder body of the test part is regulated to meet the sealing test requirements under different pressures, and the unbalanced load test result is obtained by monitoring the pressure detection data of the load sensors and the thrust sensors.
According to the application, the hand wheel screw mechanisms of the two loading modules can be controlled independently, the eccentric amount of the piston rod can be controlled by rotating the hand wheel screw, and the servo motor drives the piston rod to reciprocate through the speed reducer and the crank block mechanism so as to simulate the movement of the piston rod in the cylinder body. By the control mode, not only can the sealing condition of the piston rod under different unbalanced loading conditions be realized, but also the friction force under different eccentric and pressure states can be measured.
The technical scheme provided by the embodiment can comprise the following beneficial effects:
the application can realize the simulation of the working speed of the piston rod by adjusting the control rotating speed of the servo motor; the external force or displacement parameter applied by hand wheel loading can be used for realizing the sealing performance simulation under the unbalanced load of the sealing ring when the dead weight of the piston rod causes the unbalanced load force under the hypergravity, or the sealing performance test under the eccentric state can be realized through the control of the offset of the sealing ring.
The cylinder barrel is provided with the oil inlet, and the sealing performance of different working pressures can be tested by controlling the working pressure; the linear bearing structure and the pin shaft connection mode are designed in the driving module, so that the influence of the driving part on the experimental part is eliminated; the piston rod is connected with the driving module through a force sensor, so that the friction force can be tested.
In combination, the application has the advantages of simple structure and convenient operation, and provides a technical foundation and support for the performance research of the unbalanced load hydraulic cylinder.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
FIG. 1 is a general diagram of an unbalanced load test experiment device suitable for use with a hydraulic cylinder and a seal;
FIG. 2 is a schematic diagram of an assembly structure of a load module and a test assembly;
FIG. 3 is a schematic diagram of a roller assembly;
FIG. 4 is a schematic diagram of a drive module configuration;
FIG. 5 is a schematic diagram of the experimental assembly structure;
FIG. 6 is a schematic view of a cylinder structure;
the reference numerals in the figures are:
1-loading a module; 1-1 a lead screw nut assembly; 1-2 a screw rod fixing mounting plate; 1-3 sliding blocks; 1-4 adapter plates; 1-5 loading a force sensor; 1-6 guiding linear bearings; 1-7 roller assemblies; 1-7-1 loading shaft; 1-7-2 side plates; 1-7-3 pin shafts; 1-7-4 idler wheels; a 1-8T-shaped support plate; 1-9 displacement sensors;
2-a driving module; 2-1 servo motor; a 2-2 speed reducer; 2-3 crankshafts; 2-4 connecting rods; 2-5 sliding plates; 2-6 adjusting nuts; 2-7 movable linear bearings; 2-8 connectors; 2-9 adaptor; 2-10 transfer shafts; 2-11 slide block guide rails;
3-an experimental test section; 3-1 cylinder body; 3-2 end covers; 3-3 piston rods; 3-1-1 mounting holes; 3-1-2 oil holes; 3-1-3 fixing holes;
4-a bottom plate; 5-push force sensor.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the accompanying claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the application. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context.
The application will be further described in detail with reference to the accompanying drawings, taking the sealing unbalanced load test of the hydraulic cylinder as an example, as shown in fig. 1: comprises a bottom plate 4, a driving module 2, a loading module 1 and an experiment testing part 3 which are arranged on the bottom plate 4; the driving module 2 and the experimental test part 3 are arranged on two sides, the driving module 2 is horizontally connected with the end face of the piston rod 3-3 of the experimental test part 3 through the thrust sensor 5, the two loading modules 1 are arranged on the cylinder body 3-1 of the experimental test part 3, and the two loading modules 1 are distributed and vertically connected with the peripheral faces of the two ends of the piston rod 3-3 of the experimental test part 3 in a radial direction.
As shown in fig. 4, the driving module 2 includes a servo motor 2-1, a decelerator 2-2, a crankshaft 2-3, a connecting rod 2-4, a sliding plate 2-5, an adjusting nut 2-6, a movable linear bearing 2-7, a connecting member 2-8, an adapter member 2-9, an adapter shaft 2-10 and a sliding block guide rail 2-11; the output shaft of the servo motor 2-1 is connected with one end of a crankshaft 2-3 through a speed reducer 2-2, the crankshaft 2-3 is horizontally arranged, the other end of the crankshaft is supported on a bottom plate 4 in a connecting way through a bearing seat, the crankshaft part of the crankshaft 2-3 is connected with one end of a connecting rod 2-4, the other end of the connecting rod 2-4 is hinged with one end of a sliding plate 2-5 through a first shaft, and the sliding plate 2-5 is slidably connected and arranged on a sliding block guide rail 2-11 fixed on the bottom plate 4; the other end of the sliding plate 2-5 is hinged with one end of a connecting piece 2-8 through a movable linear bearing 2-7 and an adjusting nut 2-6 by a second shaft, the other end of the connecting piece 2-8 is hinged with one end of a switching piece 2-9 by a third shaft, and the other end of the switching piece 2-9 is fixedly provided with a switching shaft 2-10. The axial directions of the first shaft and the third shaft are parallel to each other, and the axial directions of the second shaft are perpendicular to the first shaft and the third shaft.
One end of the adapter shaft 2-10 is arranged on the adapter piece 2-9, and the other end is used for being contacted and propped against one end face of the piston rod 3-3 of the experimental test part 3 through the thrust sensor 5. The piston rod 3-3 of the experimental test part 3 is arranged horizontally.
The connecting piece 2-8 and the sliding plate 2-5 are connected through the movable linear bearing 2-7, so that relative movement along the second axial direction is allowed between one end of the connecting piece 2-8 and the other end of the sliding plate 2-5, and the position of the relative movement is regulated by the regulating nut 2-6.
Thus, the servo motor, the speed reducer, the crankshaft, the connecting rod and the sliding plate form a crank sliding mechanism, the sliding direction of the crank sliding mechanism is kept consistent with the direction of the slide block guide rails 2-11, and driving force and speed control are provided for linear reciprocating motion of the piston rod.
Under the working of the servo motor 2-1, the crankshaft 2-3 is driven to rotate, and then the other end of the connecting rod 2-4 and the whole of the sliding plate 2-5 are driven to horizontally reciprocate under the guide of the sliding block guide rail 2-11, so that the switching shaft 2-10 on the tail end of the connecting piece 2-8 is driven to push the push force sensor 5 to drive the piston rod 3-3 of the experimental test part 3 to horizontally reciprocate.
As shown in fig. 2 and 3, the loading module 1 mainly comprises a T-shaped supporting plate 1-8, a hand wheel screw mechanism, a slider guide rail mechanism, a switching assembly and a roller assembly 1-7, wherein the T-shaped supporting plate 1-8 is fixedly arranged on a cylinder body 3-1 of the experimental test part 3, the hand wheel screw mechanism and the slider guide rail mechanism are vertically fixed on the T-shaped supporting plate 1-8, the hand wheel screw mechanism and the slider guide rail mechanism are connected through the switching assembly, the switching assembly is connected with the roller assembly 1-7 through a loading force sensor 1-5, the roller assembly 1-7 is used for being connected to the circumferential surface of a piston rod 3-3 of the experimental test part 3, a displacement sensor 1-9 is arranged on the lateral side of the piston rod 3-3 of the experimental test part 3, and a probe of the displacement sensor 1-9 is directly opposite to the circumferential surface of the piston rod 3-3.
The switching component is driven by the hand wheel screw mechanism to move up and down under the limit of the slide block guide rail mechanism, so that the roller component 1-7 is driven to apply unbalanced load to the piston rod 3-3 of the experimental test part 3, and meanwhile, the horizontal axial movement of the piston rod 3-3 is detected by the displacement sensor 1-9.
The hand wheel screw mechanism comprises a screw nut component 1-1 and a hand wheel, the screw nut component 1-1 comprises a screw and a nut which are mutually sleeved through threads, the screw is vertically arranged and is hinged and installed on a T-shaped supporting plate 1-8 through two ends of a screw fixing and installing plate 1-2, the hand wheel is fixedly and coaxially connected with the upper end of the screw,
the slide block guide rail mechanism comprises a slide block 1-3 and a guide rail, the guide rail is vertically fixed on a T-shaped supporting plate 1-8, and the slide block 1-3 is slidably arranged on the guide rail;
the adapter assembly comprises an adapter plate 1-4, a guide linear bearing 1-6 and a vertical shaft, wherein the adapter plate 1-4 is arranged between a nut of a hand wheel screw mechanism and a sliding block 1-3 of a sliding block guide rail mechanism, the bottom surface of the adapter plate 1-4 is fixedly connected with the upper end of the vertical shaft through a loading force sensor 1-5, the vertical shaft is along the radial direction of a piston rod 3-3 of an experimental test part 3, and the lower end of the vertical shaft is connected with a roller assembly 1-7 after penetrating through a T-shaped supporting plate 1-8 through the guide linear bearing 1-6.
The handle on the hand wheel is rotated to drive the screw rod to rotate, a screw rod nut sliding pair is formed under the limit of the sliding block 1-3 and the guide rail to drive the adapter plate 1-4 to move up and down, and then the roller wheel assembly 1-7 is driven to move up and down by the loading force sensor 1-5. The loading of the roller assembly to the piston rod can be achieved by rotating the handle.
The roller assembly 1-7 comprises a loading shaft 1-7-1, a side plate 1-7-2, a pin shaft 1-7-3 and a roller 1-7-4; the upper end of the loading shaft 1-7-1 is fixedly connected with the vertical shaft in a coaxial manner, two sides of the lower end are fixedly provided with side plates 1-7-2 respectively, a horizontal pin shaft 1-7-3 is connected between the side plates 1-7-2 on two sides, and the idler wheels 1-7-4 are movably sleeved on the pin shaft 1-7-3.
As shown in fig. 5, the experimental test part 3 is mainly composed of a cylinder 3-1, a piston rod 3-3 and end caps 3-2, the piston rod 3-3 is horizontally and axially movably installed in the cylinder 3-1, and the end caps 3-2 are provided at both ends of the cylinder 3-1;
the two ends of the piston rod 3-3 are provided with tangential planes parallel to the axial direction, and the rollers 1-7-4 of the roller assemblies 1-7 of the loading module 1 are contacted with the tangential planes to apply eccentric load when the hydraulic cylinder works, so that the contact surface of the rollers 1-7 and the piston rod 3-3 is conveniently increased, and the influence of overlarge local contact stress on the service life of parts in the test process is reduced. . During eccentric loading, the applied eccentric loading pressure and displacement change are detected through a loading force sensor 1-5 and a displacement sensor 1-9 which are arranged on the loading module 1.
As shown in FIG. 6, the bottom of the cylinder body 3-1 is fixed on the bottom plate 4 through a fixing hole 3-1-3 and a bolt, the cylinder body 3-1 is provided with an oil hole 3-1-2, and the test oil pressure can be provided through an external oil source;
the cylinder body 3-1 is provided with a mounting hole 3-1-1, and the mounting hole 3-1-1 is used for fixing the loading module 1 on the experimental test part 3 through bolts.
According to the application, the control of the deflection amount of the hydraulic cylinder can be realized through the adjusting hand wheel, the movable connecting piece in the driving module 2 has a plurality of degrees of freedom, and the influence of different axes after the eccentric loading of the output motion direction of the driving module 2 and the piston rod on the test result can be eliminated;
aiming at each unbalanced load test, the additional moment on the slide block guide rail caused by the eccentric of the flange connecting block in the vertical direction can be realized through the adjustment of the upper limit block and the lower limit block of the linear bearing.
The friction force of the piston under the tested loading working condition can be obtained through the thrust sensor 5 arranged between the piston rod 3-3 and the connecting shaft 2-10, and the unbalanced load force of the piston under the tested loading working condition can be obtained through the two loading force sensors 1-5 on the two loading modules 1.
When the unbalanced load experiment of the hydraulic cylinder and the sealing element is carried out, the unbalanced load experiment under different pairing structures or materials can be realized by replacing the piston rod 3-3 and the end cover 3-2.
The working principle process of an embodiment of the application is as follows:
firstly, a handwheel of a handwheel screw mechanism in a loading module 1 is regulated to enable a screw nut to drive an adapter plate 1-4 to move downwards, so that a roller 1-7-4 in a roller assembly 1-7 is contacted with a piston rod 3-3 to enable the piston rod 3-3 to generate eccentricity, and the two loading modules 1 are regulated and controlled through respective handwheels to realize equal eccentricity or different eccentricity of two ends of the tested piston rod 3-3 so as to simulate the eccentric working condition of a hydraulic cylinder;
after the hand wheel is adjusted, the position of the movable linear bearing 2-7 on the second shaft is adjusted through the adjusting nut 2-6, so that the axial direction of the adapter shaft 2-10 and the movement direction of the piston rod 3-3 are kept consistent, and the influence of additional acting force caused by inconsistent driving acting force and piston movement direction of the hydraulic cylinder after the hand wheel is adjusted on test results is eliminated;
the driving module 2 works to drive the adapter shaft 2-10 to axially reciprocate so as to drive the piston rod 3-3 to synchronously move to carry out unbalanced load experiments, and speed control is provided for motion simulation of the piston rod;
in the test process, the oil pressure in the cylinder body 3-1 of the test part 3 is regulated to meet the sealing test requirements under different pressures, and the offset load test result is obtained by monitoring the pressure detection data of the plurality of load force sensors 1-5 and the thrust force sensor 5, so that the influence of offset load or offset load force on the sealing characteristic of the hydraulic cylinder and the friction force of the component is obtained.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. Unbalanced load test experimental device suitable for pneumatic cylinder and sealing member, its characterized in that: comprises a bottom plate (4), a driving module (2) arranged on the bottom plate (4), a loading module (1) and an experiment test part (3); the driving module (2) is connected with the end face of a piston rod (3-3) of the experimental test part (3) through a thrust sensor (5), the two loading modules (1) are arranged on the experimental test part (3), and the two loading modules (1) are distributed and connected with the peripheral faces of the two ends of the piston rod (3-3) of the experimental test part (3).
2. The unbalanced load experimental device suitable for a hydraulic cylinder and a sealing element according to claim 1, wherein: the driving module (2) comprises a servo motor (2-1), a speed reducer (2-2), a crankshaft (2-3), a connecting rod (2-4), a sliding plate (2-5), an adjusting nut (2-6), a movable linear bearing (2-7), a connecting piece (2-8), an adapter (2-9), an adapter shaft (2-10) and a sliding block guide rail (2-11); the output shaft of the servo motor (2-1) is connected with one end of a crankshaft (2-3) through a speed reducer (2-2), the crankshaft (2-3) is horizontally arranged, the other end of the crankshaft is supported on a bottom plate (4) in a connecting way, the crankshaft (2-3) is connected with one end of a connecting rod (2-4), the other end of the connecting rod (2-4) is hinged with one end of a sliding plate (2-5) through a first shaft, and the sliding plate (2-5) is slidably connected and arranged on a sliding block guide rail (2-11) fixed on the bottom plate (4); the other end of the sliding plate (2-5) is hinged with one end of the connecting piece (2-8) through a movable linear bearing (2-7) and an adjusting nut (2-6) by a second shaft, the other end of the connecting piece (2-8) is hinged with one end of the adapter piece (2-9) by a third shaft, and the adapter shaft (2-10) is arranged at the other end of the adapter piece (2-9).
3. The unbalanced load experimental device suitable for hydraulic cylinders and sealing elements according to claim 2, wherein: one end of the switching shaft (2-10) is arranged on the switching piece (2-9), and the other end of the switching shaft is used for being in contact and propped connection with one end face of the piston rod (3-3) of the experimental test part (3) through the thrust sensor (5).
4. The unbalanced load experimental device suitable for hydraulic cylinders and sealing elements according to claim 2, wherein: the axial directions of the first shaft and the third shaft are parallel to each other, and the axial directions of the second shaft are perpendicular to the first shaft and the third shaft.
5. The unbalanced load experimental device suitable for hydraulic cylinders and sealing elements according to claim 2, wherein: the connecting piece (2-8) is connected with the sliding plate (2-5) through a movable linear bearing (2-7), so that relative movement along the second axial direction is allowed between one end of the connecting piece (2-8) and the other end of the sliding plate (2-5), and the position of the relative movement is regulated by limiting an adjusting nut (2-6).
6. The unbalanced load experimental device suitable for a hydraulic cylinder and a sealing element according to claim 1, wherein: the loading module (1) mainly comprises a T-shaped supporting plate (1-8), a hand wheel screw mechanism, a sliding block guide rail mechanism, a switching component and a roller component (1-7), wherein the T-shaped supporting plate (1-8) is fixedly arranged on an experimental test part (3), the hand wheel screw mechanism and the sliding block guide rail mechanism are vertically fixed on the T-shaped supporting plate (1-8), the hand wheel screw mechanism and the sliding block guide rail mechanism are connected through the switching component, the switching component is connected with the roller component (1-7) through a loading force sensor (1-5), the roller component (1-7) is used for being connected onto the circumferential surface of a piston rod (3-3) of the experimental test part (3), and a displacement sensor (1-9) is arranged on the lateral side of the piston rod (3-3) of the experimental test part (3).
7. The unbalanced load testing device applicable to hydraulic cylinders and sealing elements according to claim 6, wherein: the hand wheel screw mechanism comprises a screw nut component (1-1) and a hand wheel, the screw nut component (1-1) comprises a screw and a nut which are mutually sleeved through threads, the screw is vertically arranged, two ends of the screw are hinged and arranged on a T-shaped supporting plate (1-8), the hand wheel is fixedly and coaxially connected with the upper end of the screw,
the sliding block guide rail mechanism comprises a sliding block (1-3) and a guide rail, wherein the guide rail is vertically fixed on a T-shaped supporting plate (1-8), and the sliding block (1-3) is slidably arranged on the guide rail;
the switching assembly comprises an adapter plate (1-4), a guide linear bearing (1-6) and a vertical shaft, wherein a nut of a hand wheel screw mechanism and a sliding block (1-3) of a sliding block guide rail mechanism are fixedly connected with the upper end of the vertical shaft through a loading force sensor (1-5) through the adapter plate (1-4), and the lower end of the vertical shaft is connected with a roller assembly (1-7) after penetrating through a T-shaped supporting plate (1-8) through the guide linear bearing (1-6).
8. The unbalanced load testing device applicable to hydraulic cylinders and sealing elements according to claim 6, wherein: the roller assembly (1-7) comprises a loading shaft (1-7-1), a side plate (1-7-2), a pin shaft (1-7-3) and a roller (1-7-4); the upper end of the loading shaft (1-7-1) is fixedly connected with the vertical shaft in a coaxial manner, two sides of the lower end are fixedly provided with side plates (1-7-2) respectively, a horizontal pin shaft (1-7-3) is connected between the side plates (1-7-2) at two sides, and the idler wheel (1-7-4) is movably sleeved on the pin shaft (1-7-3).
9. The unbalanced load testing device for a hydraulic cylinder and a sealing element according to claim 1, wherein: the experimental test part (3) mainly comprises a cylinder body (3-1), a piston rod (3-3) and end covers (3-2), wherein the piston rod (3-3) is horizontally and axially movably arranged in the cylinder body (3-1), and the end covers (3-2) are arranged at two ends of the cylinder body (3-1);
the two ends of the piston rod (3-3) are provided with tangential planes parallel to the axial direction, and the rollers (1-7-4) of the roller assemblies (1-7) of the loading module (1) are contacted with the tangential planes to apply eccentric load when the hydraulic cylinder works.
10. The unbalanced load test method applied to the unbalanced load test device of claim 1 is characterized in that:
firstly, a handwheel of a handwheel screw mechanism in a loading module (1) is regulated, so that a screw nut drives an adapter plate (1-4) to move downwards, thereby enabling a roller (1-7-4) in a roller assembly (1-7) to be in contact with a piston rod (3-3), enabling the piston rod (3-3) to generate eccentricity, and two loading modules (1) are regulated and controlled through respective handwheels to realize equal eccentricities or different eccentricities at two ends of the tested piston rod (3-3) so as to simulate the eccentric working condition of a hydraulic cylinder;
after the hand wheel is adjusted, the position of the movable linear bearing (2-7) on the second shaft is adjusted through the adjusting nut (2-6), so that the axial direction of the adapter shaft (2-10) is consistent with the movement direction of the piston rod (3-3);
the driving module (2) works to drive the adapter shaft (2-10) to axially reciprocate so as to drive the piston rod (3-3) to synchronously move for carrying out unbalanced load experiments;
in the test process, the oil pressure in the cylinder body (3-1) of the test part (3) is regulated to meet the sealing test requirements under different pressures, and the pressure detection data of the plurality of load sensors (1-5) and the thrust sensor (5) are monitored to further obtain the unbalanced load test result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310549859.7A CN116773156A (en) | 2023-05-16 | 2023-05-16 | Unbalanced load test experiment device suitable for hydraulic cylinder and sealing element |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310549859.7A CN116773156A (en) | 2023-05-16 | 2023-05-16 | Unbalanced load test experiment device suitable for hydraulic cylinder and sealing element |
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| CN116773156A true CN116773156A (en) | 2023-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310549859.7A Pending CN116773156A (en) | 2023-05-16 | 2023-05-16 | Unbalanced load test experiment device suitable for hydraulic cylinder and sealing element |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117287446A (en) * | 2023-11-22 | 2023-12-26 | 新乡市万和过滤技术股份公司 | Hydraulic cylinder test system |
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2023
- 2023-05-16 CN CN202310549859.7A patent/CN116773156A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117287446A (en) * | 2023-11-22 | 2023-12-26 | 新乡市万和过滤技术股份公司 | Hydraulic cylinder test system |
| CN117287446B (en) * | 2023-11-22 | 2024-02-13 | 新乡市万和过滤技术股份公司 | Hydraulic cylinder test system |
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