CN114295510A - Lubricating grease linear acceleration performance testing machine - Google Patents
Lubricating grease linear acceleration performance testing machine Download PDFInfo
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- CN114295510A CN114295510A CN202111369492.8A CN202111369492A CN114295510A CN 114295510 A CN114295510 A CN 114295510A CN 202111369492 A CN202111369492 A CN 202111369492A CN 114295510 A CN114295510 A CN 114295510A
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- 239000004519 grease Substances 0.000 title claims abstract description 67
- 230000001050 lubricating effect Effects 0.000 title claims abstract description 55
- 230000001133 acceleration Effects 0.000 title claims abstract description 37
- 238000012360 testing method Methods 0.000 title claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 34
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 238000013016 damping Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 10
- 230000008602 contraction Effects 0.000 claims description 9
- 230000003139 buffering effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 2
- 230000000712 assembly Effects 0.000 claims description 2
- 230000008569 process Effects 0.000 description 9
- 230000009471 action Effects 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
A linear acceleration performance testing machine for lubricating grease comprises a box body, a loading ejection device and a damping device, wherein a loading spring and a bracket used for being provided with a lubricating grease sample box are arranged in the box body, the loading ejection device comprises a trigger rod, a loading assembly and a driving mechanism, the loading assembly comprises a loading box and a sliding block, the sliding block is installed in the loading box through a small spring, the sliding block is provided with a short limiting end and a long limiting end, the long limiting end extends out of the loading box through a hole in the loading box, one side of the long limiting end is provided with a bracket loading surface matched with the bracket, and a trigger inclined surface matched with the trigger rod is arranged on the short limiting end; the device is used for obtaining the acceleration performance of the lubricating grease on the surface of a certain metal under the condition of linear acceleration to evaluate the mass fraction of the lubricating grease loss, has a simple principle, is safe and reliable, and provides a powerful tool for researching the use condition of the lubricating grease with sudden acceleration.
Description
Technical Field
The invention relates to the technical field of lubricating grease acceleration performance testing equipment, in particular to a lubricating grease linear acceleration performance testing machine.
Background
At present, the common test contents of the performance indexes of the lubricating grease mainly comprise viscosity, thixotropy, cone penetration, condensation point, rheological property and the like. The thixotropy, cone penetration and condensation point are all detected in a static environment, the viscosity is detected in an environment of uniform relative motion of lubricating grease in two parts, the test of the rheological property is relatively complex, and the test is mainly divided into a capillary rheometer and a rotary rheometer, wherein the rotary rheometer is divided into a stress control type, a strain control type, a torque control type and an interface rheometer.
With the development of the precise lubrication technology, the actual requirement for quantitatively supplying the lubricating oil in real time according to the requirement is gradually increased, for example, grease lubrication parts on a spacecraft need to bear larger acceleration, a plurality of G or even a plurality of dozen G bearing lubricating grease can be thrown to one side, acceleration performance test between the lubricating grease and the parts is needed for ensuring that the lubricating grease cannot be thrown away and run off under the condition of high acceleration, no related instrument is put into use at present, the viscosity value is usually used for estimation, the viscosity is the embodiment of the internal friction force of the lubricating grease and is used for measuring the rheological property of the interface of the lubricating grease with a certain error, and therefore, a test device for testing the linear acceleration performance of the lubricating grease is also lacked.
Disclosure of Invention
In order to solve the technical problem, the invention provides a linear acceleration performance testing machine for lubricating grease, which can be used for measuring rheological parameters between lubricating grease and a lubricating object interface.
The technical scheme adopted by the invention is as follows: a linear acceleration performance tester for lubricating grease comprises:
the lubricating grease sample box comprises a box body, wherein a loading spring and a bracket for mounting a lubricating grease sample box are arranged in the box body, the bracket is mounted in the box body through a sliding rail, the loading spring is positioned on one side of the bracket, and a damping device for buffering the quickly moving bracket is arranged on one side, far away from the loading spring, in the box body;
the loading ejection device comprises a trigger rod, a loading assembly and a driving mechanism for driving the loading assembly to move, wherein the loading assembly is symmetrically arranged on two sides of a bracket and comprises a loading box and a sliding block, the sliding block is installed in the loading box through a small spring, the sliding block is provided with a short limiting end head and a long limiting end head, the long limiting end head extends out of the loading box through a hole in the loading box, one side of the long limiting end head is provided with a bracket loading surface matched with the bracket, the short limiting end head is provided with a triggering inclined surface matched with the trigger rod, the long limiting end head is in an outward extending limit position under the pretightening force of the small spring in the state that the triggering inclined surface is not contacted with the trigger rod, the driving mechanism drives the loading assembly to move, and the bracket loading surface tightly pushes against the side surface of the bracket and drives the bracket to move along the contraction direction of the loading spring; under the state that the trigger inclined plane is contacted with the trigger rod, the trigger rod props against the trigger inclined plane and drives the sliding block to move along the contraction direction of the small spring during the movement of the loading assembly, so that the loading surface of the bracket at the long limit end is gradually separated from the bracket, and the bracket is ejected out when the bracket is completely separated.
Preferably, the damping device comprises dampers positioned on two sides of the sliding rail and a buffer spring sleeved on the sliding rail, the dampers are provided with a light point switch and an electromagnet, when the bracket passes through the dampers, the electromagnet is controlled by the photoelectric switch to be electrified, and the size of the contact surface between the electromagnet and the bracket and the suction force of the electromagnet to the bracket are in direct proportion.
As a preferred scheme, the gantry crane is further provided with a gantry rod with an inverted U-shaped structure, two free ends of the gantry rod are respectively and symmetrically connected with a screw rod sleeve, the screw rod sleeves are connected with a driving mechanism, and the loading assemblies are symmetrically arranged on the inner side faces, opposite to the two free ends, of the gantry rod.
Preferably, the driving mechanism comprises two groups of motors and a screw rod, wherein the screw rod is connected with the screw rod sleeve.
Preferably, the loading box is further provided with a box cover, the box cover is connected with the loading box through a locking assembly and encapsulates the small spring and the sliding block in an inner cavity of the loading box, and the outer wall of the loading box is provided with a sliding block hole for the long limiting end to pass through and a trigger rod through hole for the trigger end on the trigger rod to pass through.
Preferably, a small spring seat is arranged at one end of the sliding block, the small spring is installed between the small spring seat and the inner wall of the loading box, a short limiting end and a long limiting end are arranged at the other end of the sliding block, a first guide plane and a trigger inclined plane are arranged on the short limiting end, a bracket loading surface is arranged on one side surface, close to the short limiting end, of the long limiting end, a second guide plane and a return inclined plane are arranged on the other side of the long limiting end, and the first guide plane and the second guide plane are respectively matched with the inner wall of the loading box to enable the sliding block to move along the interior of the loading box.
As the preferred scheme, a limit plane matched with a boss in the loading box is further arranged on the sliding block between the short limit end and the long limit end.
Preferably, the sample box comprises a sample box shell, a low plane and a high plane with a height difference are arranged in an inner cavity of the sample box shell, and a metal sheet placing groove is formed in the high plane.
Preferably, the bottom of the bracket is provided with a sliding sleeve structure which is matched with the sliding rail for installation.
Preferably, a reversing switch for reversing the driving mechanism is further arranged in the box body, and when the loading assembly is in contact with the reversing switch in motion, a motor in the driving mechanism rotates in a reverse direction.
The invention has the beneficial effects that:
the invention provides a testing machine for measuring the acceleration performance of lubricating grease, which is used for obtaining the acceleration performance of the lubricating grease on a certain metal surface under the condition of linear acceleration to evaluate the mass fraction of lubricating grease loss.
The specific technical effects are as follows:
firstly, the invention provides a test device for measuring the acceleration performance of lubricating grease through innovation, and the device is of a box-packed structure and is convenient to use, install and carry.
Secondly, the invention provides a test device for measuring the acceleration performance of the lubricating grease through innovation, the principle is simple, the mass of the metal sheet and the lubricating grease on the metal sheet is weighed through a balance before the test, the mass of the metal sheet and the lubricating grease on the metal sheet after the test are weighed, the mass fraction of the lubricating grease loss is easy to calculate, and the acceleration performance of the lubricating grease on the metal sheet is measured by utilizing the surplus rate. Residual ratio = m1/m0×100%.
m0-total mass of metal sheet and grease before experiment
m1-total mass of metal flakes and grease after experiment
Thirdly, the assembly with the lubricating grease sample box is released through the structure of the loading ejection device through the innovative structural design, the structure is simple, and the operation is reliable; the double lead screws are used for driving the bracket to extrude the loading spring, so that bending moment and torque are not generated, and force is uniform. When the trigger rod acts, the sliding block contracts inwards, so that the bracket is released suddenly; the loading assembly symmetrically applies loading force to two sides of the bracket provided with the sample box through the gantry rod, the loading force on each side is realized through the matching of the pretightening force of the elastic assembly inside and the sliding block, and the loading device has the advantages of simple structure and convenience in adjustment; the friction of the sudden release assembly against the carrier is negligible.
Fourthly, the invention provides a bracket capturing component through innovation, the component utilizes the form that the buffer spring and the electromagnet are matched with each other, the electromagnet is controlled by the photoelectric switch, the photoelectric switch is passed through when the bracket enters a part of the damper, and the buffer spring is already acted at the moment, so that the bracket is not decelerated too fast when being captured. The round angle is arranged in front of the damper, so that errors caused by expansion with heat and contraction with cold are avoided, and the bracket is ensured to smoothly enter the damper.
Fourthly, through innovation, the adopted sample boxes have the same specification and can be replaced mutually, and the parts of the sample boxes have two planes with different heights, so that lubricating grease which runs off in the acceleration test can not return to the metal sheet when the bracket is captured. The arc-shaped notch is formed in the bracket, so that the sample box is convenient to take. The shell below the arc-shaped notch is provided with a continuous section of plane, so that the sliding block can be conveniently compressed by the bracket after releasing the bracket and cannot be ejected until the bracket leaves the loading assembly. When the loading assembly returns, the guide slope structure firstly contacts the bracket, the slide block is compressed again until the loading assembly completely passes through the bracket and then pops up, and the loading assembly is ready for loading the bracket next time.
Secondly, through innovation, the structure of the sliding block is optimally designed, one end of the sliding block is in contact with the loading inner wall through the elastic component, the other side of the sliding block is provided with a short limiting end and a long limiting end, the short limiting end is provided with a first guide plane and a trigger inclined plane, one side surface, close to the short limiting end, of the long limiting end is provided with a bracket loading surface, the other side of the long limiting end is provided with a second guide plane and a return inclined plane, the first guide plane and the second guide plane are respectively matched with the inner wall of the loading box to realize the movement of the sliding block along the loading box, the structure can well realize the function of loading the bracket, and is simpler in structure, more convenient to use and high in reliability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of one embodiment of the present invention;
FIG. 2 is a schematic structural view of the interior of the case;
FIG. 3 is a schematic structural view of a bracket;
FIG. 4 is a schematic diagram of a sample cartridge;
FIG. 5 is a schematic structural diagram of a loading assembly;
FIG. 6 is a schematic structural view of a slider;
FIG. 7 is a schematic view of the slider in a contact loading state with the carriage;
fig. 8 is a schematic view of the slide in an ejection disengaged state from the carriage under the action of the trigger lever.
The labels in the figure are: 1. a box body, 11, a loading spring, 12, a motor, 13, a reversing switch, 14, a box cover, 15, a pin, 16, a light spot switch, 17, a spring seat, 18, a slide way installation hole, 19, a hinge, 2, a stop switch, 20, a power supply, 3, a damper, 31, an electromagnet, 4, a buffer spring, 5, a lead screw, 6, a slide way, 7, a loading assembly, 71, a gantry rod, 72, a lead screw sleeve, 73, a slide block box, 74, a trigger rod through hole, 75, a bolt, 76, a cover plate, 77, a slide block, 771, a trigger inclined plane, 772, a first guide plane, 773, a small spring seat, 774, a limit plane, 775, a second guide plane, 776, a return inclined plane, 777, a bracket loading surface, 78, a slide block hole, 79, a small spring, 8, a trigger rod, 81, a trigger end, 9, a bracket, 91, a bracket shell, 92, a slide way structure, 93, an arc notch, 10, a switch, a, Sample box, 101, sample box casing, 102, low plane, 103, high plane, 104, sheet metal place groove.
Detailed Description
The invention is described in detail below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
It should be noted that: unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of the terms "a" and "an" or "the" and similar referents in the description and claims of the present invention are not to be construed as limiting in number, but rather as indicating the presence of at least one. The word "comprise" or "comprises", and the like, indicates that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, but does not exclude other elements or items having the same function.
The working principle of the scheme is as follows: based on the grease linear acceleration performance testing machine, before the experiment, the balance is used for weighing the metal sheet and the mass of the grease on the metal sheet, the prepared metal sheet is clamped in the bracket through the sample box, the bracket is loaded with energy through the loading ejection device and ejected out, and the process is as follows: the double lead screws are used for driving the bracket to extrude the loading spring, so that bending moment and torque are not generated, and force is uniform; when the trigger rod acts, the sliding block contracts inwards, so that the bracket is released suddenly, and the friction force of the sudden release assembly on the bracket can be ignored;
then weighing the metal sheet and the grease on the metal sheet after the experiment, easily calculating the mass fraction of the grease loss, and measuring the acceleration performance of the grease on the metal sheet by using the residual rate, wherein the residual rate = m1/m0×100%.
m0-total mass of metal sheet and grease before experiment
m1-total mass of metal sheet and grease after experiment;
and evaluating the acceleration performance of the lubricating grease on the surface of the metal sheet by measuring the fraction of the mass of the residual lubricating grease on the metal sheet to the mass of the lubricating grease to be detected on the metal sheet before the experiment.
Examples 1,
The detailed structure of the present embodiment is described below with reference to fig. 1 to 8:
as shown in fig. 1-6, a linear acceleration performance testing machine for lubricating grease is provided with a box body 1, a bracket 9 for mounting a sample box, a loading spring 11, a trigger lever 8, a loading assembly 7, a driving mechanism for driving the loading assembly 7 to move, a slide rail 6 and a damping device are arranged in the box body 1, wherein the bracket 9 is mounted in the box body 1 through the slide rail 6, so that the bracket 9 can freely slide along the slide rail 6 when not constrained, the loading spring 11 is located on one side of the bracket 9 for providing ejection power, and the damping device is arranged on one side of the box body 1 away from the loading spring 11 for buffering the bracket 9 which moves rapidly;
secondly, a trigger lever 8, a loading assembly 7, a loading spring 11 and a driving mechanism for driving the loading assembly to move integrally form a loading ejection device for outputting power to the bracket 9, wherein the loading assembly 7 is symmetrically arranged at two sides of the bracket 9 and comprises a loading box 73 and a slide block 77, the slide block 77 is installed in the loading box 73 through a small spring 79, the slide block 77 is provided with a short limit end and a long limit end, the long limit end extends out of the loading box through a hole on the loading box 73, a bracket loading surface 777 matched with the bracket 9 is arranged at one side of the long limit end, a trigger inclined surface 771 matched with the trigger lever 8 is arranged on the short limit end, the long limit end is in an outward extending limit position under the pre-tightening force of the small spring 79 under the condition that the trigger inclined surface 771 is not in contact with the trigger lever 8, and the driving assembly drives the loading assembly 7 to move, the bracket loading surface 777 tightly props against the side surface of the bracket 9 and drives the bracket to move along the contraction direction of the loading spring 2; under the state that the trigger slope 771 is in contact with the trigger rod 8, the trigger tip 81 on the trigger rod 8 extends into the loading box 73 to abut against the trigger slope 771 during the movement of the loading assembly 7, and drives the slider 77 to move along the contraction direction of the small spring 79, so that the bracket loading surface 777 of the long limit tip is gradually separated from the bracket 9, and when the bracket 9 is completely separated, the bracket 9 is ejected by the acting force of the loading spring 2.
In this embodiment, as shown in fig. 1 and 2, the damping device includes a damper 3 located on both sides of the slide rail 6 and a buffer spring 4 sleeved on the slide rail 6, the damper has a light spot switch 16 and an electromagnet 31, when the bracket 9 passes through the damper, the electromagnet 31 is controlled by the photoelectric switch 16 to be powered on, and the size of the contact surface between the electromagnet 31 and the bracket 9 and the attraction force of the electromagnet to the bracket are in a direct proportion relationship. According to the structure, the following components are adopted: the bracket moving at high speed can be captured by the damping device, and the capturing process comprises the following steps: when the bracket is popped up by the loading spring, the bracket can initially move in an accelerated manner under the action of the elastic force of the loading spring until the bracket is separated from the loading spring after reaching the limit length of the loading spring, at the moment, the acceleration performance test action on lubricating grease is finished, the photoelectric switch of the damper can be triggered in the process of continuous movement, the electromagnet 31 is electrified, at the moment when the electromagnet 31 is electrified, the size of the contact surface of the electromagnet and the bracket is in direct proportion to the attraction force of the electromagnet to the bracket, however, the bracket 9 can still continuously pass a distance forwards and can contact the buffer spring 4 to gradually decelerate until being completely attracted by the electromagnet, and the capturing process of the damper to the bracket is finished.
In this embodiment, as shown in fig. 3, the bracket is provided with a bracket shell 91, an arc notch 93 is provided at the upper edge of the bracket shell 91, two symmetrical sliding sleeve structures 92 are provided at the bottom of the bracket shell 91, the sliding sleeve structures 92 can be matched with sliding rails in the box body, so that the bracket for bearing the sample box can freely slide on the sliding rails.
In this embodiment, as shown in fig. 4, the sample box 10 includes a sample box housing 101, a low plane 102 and a high plane 103 having a height difference are disposed in an inner cavity of the sample box housing 101, a metal sheet placing groove 104 is disposed on the high plane 103, grease to be tested is uniformly coated on a tested metal sheet with a thickness of 1mm and is installed in the metal sheet placing groove 104, and then the sample box 10 is mounted in the bracket 9.
As shown in fig. 5, the loading assembly 7 mainly comprises a gantry rod 71, a screw rod sleeve 72, a loading box 73, a slider 77 and a small spring 79, for the convenience of the loading mechanism to symmetrically apply loading force to two sides of a bracket equipped with a sample box, the gantry rod 71 is configured in an inverted U-shaped structure, two free ends 711 at the lower end of the gantry rod are respectively connected with the screw rod sleeve 72, the screw rod sleeve 72 can be matched with a driving mechanism consisting of a screw rod and a motor, and the following structure is preferred in this embodiment: two groups of motors 12 and screw rods 5 are adopted and symmetrically arranged at two sides of a bracket 9, wherein each screw rod is connected with an independent motor, and the screw rods and corresponding screw rod sleeves form a rotary connection relation; the motor outputs power, and the whole loading mechanism is driven to move through the matching of the screw rod and the screw rod sleeve 72;
the loading unit integrally formed by the loading box 73, the slider 77 and the small spring 79 is symmetrically arranged on the inner side surfaces opposite to the two free ends of the gantry rod 71, wherein the loading box 73 is fixedly connected with the gantry rod 71, the slider 77 is installed in the loading box 73 through the elastic component 79, one end of the slider 77 extends out of the loading box through a hole in the loading box 73, and one end of the slider 77 is in an extending limit position through the pretightening force of the small spring 79, at the moment, one end of the extending slider can apply a loading force on the side surface of the bracket, and the bracket 9 is synchronously driven to move to one side in the process that the driving mechanism drives the loading mechanism 7 to move.
And a reversing switch 13 is further arranged on one side in the box body 1, after the loading assembly 7 releases the bracket 9, the loading assembly 7 can continue to move and contact the reversing switch, the motor 12 rotates reversely at the moment to drive the screw rod 5 to rotate reversely, the loading assembly 7 moves towards the return stroke, and can contact a stop switch when moving to the terminal point, and the stop switch sends a signal to turn off the motor after being pressed.
In this embodiment, the loading box 73 is further provided with a cover plate 76, the cover plate 76 is connected with a port of the loading box 73 through a bolt 75 and encloses an elastic component 79 and a slider 77 in an inner cavity of the loading box, and the outer wall of the loading box 73 is further provided with a trigger rod through hole 74 and a slider through hole 78.
As shown in fig. 6, one end of the slider 77 is provided with a small spring seat 773, the small spring 79 is installed between the small spring seat 773 and the inner wall of the loading box 73, the other end of the slider 77 is provided with a short limit tip and a long limit tip, wherein the short limit tip is provided with a first guide plane 772 and a trigger inclined plane 771, one side of the long limit tip close to the short limit tip is provided with a bracket loading surface 777, and the other side of the long limit tip is provided with a second guide plane 775 and a return inclined plane 776, wherein the first guide plane 772 and the second guide plane 775 are respectively matched with the inner wall of the loading box 73 to realize that the slider 77 moves along the loading box; the slider 77 located between the short limit end and the long limit end is further provided with a limit plane 774 matched with the boss in the loading box 73.
The action process of the sliding block is as follows:
firstly, a sliding block 77 is installed in a loading box 73, the loading box 73 is provided with a cover plate 76, when the loading box is installed, a small spring 79 is sleeved on two spring seats 773 behind the sliding block 77 and is pressed by a proper amount, the small spring 79 and the sliding block 77 can be placed into the loading box, at the moment, the small spring has a certain pretightening force and ensures that the sliding block is located at an extending limit position, namely, a limit plane 774 is tightly attached to one side of a rectangular boss in the loading box, and the rectangular boss also serves as a sliding fit effect with the sliding block. Because the loading force is large, the second guide plane 775 with the medium length is stressed, and the guide planes are more, so that the sliding block can smoothly slide;
when the motor 4 outputs, the whole loading assembly 7 is driven to move by the matching of the screw rod 5 and the screw rod sleeve 72, at this time, the moving direction is the direction towards the contraction of the loading spring, the bracket loading surface 777 tightly pushes against the side surface of the bracket 9 to drive the bracket to synchronously move, as shown in fig. 7, in the movement of the loading assembly 7, the trigger inclined surface 771 on the slider 77 touches the trigger end 61 on the trigger rod 8, at this time, the inclined surface on the trigger end 61 is in contact with the trigger inclined surface, the loading assembly 7 continues to move, as the trigger rod 8 is not moving, the trigger end 61 props against the trigger inclined surface 771 and drives the slider 77 to contract towards the inner side of the loading box 73, that is, the slider 77 moves towards the contraction direction of the small spring 79, the bracket loading surface 777 also synchronously contracts towards the loading box 73 until completely separating from the side surface of the bracket, as shown in fig. 8, the small spring 79 is in the compression state at this time, the bracket loading surface is separated from the bracket, the bracket is ejected out by the elastic acting force of the loading spring, the loading assembly 7 continues to move until the loading box touches the reversing switch 9, the motor 4 rotates reversely and drives the loading assembly to return to the initial position, and the bracket is pulled back to the initial position through the return inclined plane 776 during return stroke.
The working process of the tester is as follows:
preparing a metal sheet to be detected and lubricating grease to be detected, uniformly pressing and coating the lubricating grease to the surface of the metal sheet, suggesting that the thickness of the lubricating grease is about 1mm, placing the metal sheet coated with the lubricating grease on a forceps clip into a balance to weigh the total weight, placing the metal sheet into a metal sheet placing groove 104 of a sample box, placing the sample box 10 into a bracket 9, ensuring that the direction of a high plane of the sample box is a buffer spring 4, covering a box cover 14, clicking a power button 20, simultaneously starting a pair of motors 12, driving a lead screw 5 to rotate by the motors 12, starting a loading assembly 7 to work under the action of the cooperation of the lead screw 5 and a lead screw sleeve 72, enabling a side surface pressing bracket shell 91 of a sliding block 77 to move towards a loading spring 11, enabling the loading spring 11 to start to shrink under the guidance of a spring seat 17, and enabling a trigger slope 771 of the sliding block 77 to be in contact with the tip of a trigger rod 8 in the process of continuing pressing the loading spring 11 by the bracket 9, under the action of the inclined plane principle, the sliding block 77 starts to press the small spring 79 to contract, and simultaneously, the sliding block 77 contracts inwards until the sliding block 77 is separated from the bracket 9, at the moment, the bracket 9 pops up under the action of the loading spring 11 and moves rapidly along the sliding rail 6. At this time, on the one hand, the loading assembly 7 is contacted with the 13 reversing switch when continuing to move, the motor 12 rotates reversely, and the loading assembly 7 makes return motion. On the other hand, when the carriage 9 moving at a high speed enters the area of the damper 3 and passes through the photoelectric switch 16, the electromagnet 31 is energized, and the carriage 9 contacts the buffer spring 4, and accordingly, the larger the contact area between the electromagnet 31 and the carriage 9 is, the carriage 9 is tightly attracted. In the process of returning the loading assembly 7, the return inclined plane 776 contacts with the bracket 9, so that the slide block 77 is contracted again until the slide block is ejected again after reaching the rear part of the bracket, the loading assembly 7 continues to move, the movement is stopped after contacting the stop switch 2, the box cover 14 is opened, the sample box 10 is taken out, the metal sheet with residual grease is taken out for testing, the box cover is closed, and the power supply 20 is turned off. The metal sheet with the residual grease was weighed on a balance. And acquiring experimental data, and if the specific acceleration needs to be calculated, calculating the loading force by using the elastic force and the compression distance of the loading spring, and dividing the loading force by the total mass of the bracket and the sample.
It should be noted that while the invention has been described in terms of the above-mentioned embodiments, other embodiments are also possible. It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention, and it is intended that all such changes and modifications be covered by the appended claims and their equivalents.
Claims (10)
1. A linear acceleration performance testing machine for lubricating grease is characterized in that: the method comprises the following steps:
the lubricating grease sample box comprises a box body, wherein a loading spring and a bracket for mounting a lubricating grease sample box are arranged in the box body, the bracket is mounted in the box body through a sliding rail, the loading spring is positioned on one side of the bracket, and a damping device for buffering the quickly moving bracket is arranged on one side, far away from the loading spring, in the box body;
the loading ejection device comprises a trigger rod, a loading assembly and a driving mechanism for driving the loading assembly to move, wherein the loading assembly is symmetrically arranged on two sides of a bracket and comprises a loading box and a sliding block, the sliding block is installed in the loading box through a small spring, the sliding block is provided with a short limiting end head and a long limiting end head, the long limiting end head extends out of the loading box through a hole in the loading box, one side of the long limiting end head is provided with a bracket loading surface matched with the bracket, the short limiting end head is provided with a triggering inclined surface matched with the trigger rod, the long limiting end head is in an outward extending limit position under the pretightening force of the small spring in the state that the triggering inclined surface is not contacted with the trigger rod, the driving mechanism drives the loading assembly to move, and the bracket loading surface tightly pushes against the side surface of the bracket and drives the bracket to move along the contraction direction of the loading spring; under the state that the trigger inclined plane is contacted with the trigger rod, the trigger rod props against the trigger inclined plane and drives the sliding block to move along the contraction direction of the small spring during the movement of the loading assembly, so that the loading surface of the bracket at the long limit end is gradually separated from the bracket, and the bracket is ejected out when the bracket is completely separated.
2. The linear acceleration performance tester for lubricating grease according to claim 1, characterized in that: the damping device comprises dampers positioned on two sides of the sliding rail and a buffer spring sleeved on the sliding rail, the dampers are provided with a light point switch and an electromagnet, when the bracket passes through the dampers, the electromagnet is controlled by the photoelectric switch to be powered on, and the size of the contact surface of the electromagnet and the bracket and the suction force of the electromagnet to the bracket are in a direct proportion relation.
3. The linear acceleration performance tester for lubricating grease according to claim 1, characterized in that: the gantry crane is further provided with a gantry rod with an inverted U-shaped structure, two free ends of the gantry rod are respectively and symmetrically connected with a screw rod sleeve, the screw rod sleeves are connected with a driving mechanism, and the loading assemblies are symmetrically arranged on the inner side faces, opposite to the two free ends, of the gantry rod.
4. The linear acceleration performance tester for lubricating grease according to claim 3, characterized in that: the driving mechanism comprises two groups of motors and a screw rod, wherein the screw rod is connected with the screw rod sleeve.
5. The linear acceleration performance tester for lubricating grease according to claim 1, characterized in that: the loading box is further provided with a box cover, the box cover is connected with the loading box through a locking assembly and encapsulates the small spring and the sliding block in the inner cavity of the loading box, and the outer wall of the loading box is provided with a sliding block hole for the long limiting end to pass through and a trigger rod through hole for the trigger end on the trigger rod to pass through.
6. The linear acceleration performance tester for lubricating grease according to claim 1, characterized in that: one end of the sliding block is provided with a small spring seat, the small spring is installed between the small spring seat and the inner wall of the loading box, the other end of the sliding block is provided with a short limiting end and a long limiting end, a first guide plane and a trigger inclined plane are arranged on the short limiting end, a bracket loading surface is arranged on one side face, close to the short limiting end, of the long limiting end, a second guide plane and a return inclined plane are arranged on the other side of the long limiting end, and the first guide plane and the second guide plane are matched with the inner wall of the loading box respectively to achieve that the sliding block moves in the loading box.
7. The linear acceleration performance tester for lubricating grease according to claim 6, characterized in that: and a limiting plane matched with the boss in the loading box is also arranged on the sliding block between the short limiting end and the long limiting end.
8. The linear acceleration performance tester for lubricating grease according to claim 1, characterized in that: the sample box comprises a sample box shell, wherein a low plane and a high plane with height difference are arranged in an inner cavity of the sample box shell, and a metal sheet placing groove is formed in the high plane.
9. The linear acceleration performance tester for lubricating grease according to claim 1, characterized in that: the bottom of the bracket is provided with a sliding sleeve structure which is matched with the sliding rail for installation.
10. The linear acceleration performance tester for lubricating grease according to claim 1, characterized in that: a reversing switch for reversing the driving mechanism is further arranged in the box body, and when the loading assembly is in contact with the reversing switch in motion, a motor in the driving mechanism rotates reversely.
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| CN114295510B (en) | 2023-08-08 |
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Denomination of invention: A lubricating grease linear acceleration performance testing machine Granted publication date: 20230808 Pledgee: Bank of China Zhengzhou branch of Limited by Share Ltd. culture Pledgor: Zhengzhou Zhongcheng Lubrication Technology Co.,Ltd. Registration number: Y2024980024355 |