CN114166676A - Hydraulic pump flow distribution pair friction and wear testing device with online monitoring function - Google Patents
Hydraulic pump flow distribution pair friction and wear testing device with online monitoring function Download PDFInfo
- Publication number
- CN114166676A CN114166676A CN202111470025.4A CN202111470025A CN114166676A CN 114166676 A CN114166676 A CN 114166676A CN 202111470025 A CN202111470025 A CN 202111470025A CN 114166676 A CN114166676 A CN 114166676A
- Authority
- CN
- China
- Prior art keywords
- friction
- disc
- flow distribution
- end cover
- oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 52
- 238000012544 monitoring process Methods 0.000 title claims abstract description 18
- 230000008093 supporting effect Effects 0.000 claims abstract description 21
- 238000006073 displacement reaction Methods 0.000 claims abstract description 20
- 238000004088 simulation Methods 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims description 38
- 238000007789 sealing Methods 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 6
- 230000003068 static effect Effects 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 5
- 230000001050 lubricating effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 66
- 230000008859 change Effects 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention provides a friction and wear testing device of a hydraulic pump flow distribution pair with an online monitoring function, which relates to the technical field of hydraulic element testing and comprises a simulation part, a pushing part, a rotating part and a detecting part, wherein in the device, the principle is reliable, the structure is simple and compact, the functions are complete, and the device is convenient to disassemble and assemble; the supporting mode of static pressure supporting of a high-pressure oil source is adopted, so that the supporting effect is stable, the friction disc rotates stably, a larger supporting force can be generated, and higher testing pressure is achieved; a bearing supporting main shaft is omitted, so that the damage of the bearing is avoided, the device can be tested for a long time, and the test stability and the service life are improved; displacement sensor and temperature sensor can know current friction state in real time through lubricating film thickness and temperature field to the on-line monitoring of testing process, can adjust the test under oil pressure and the loading force realization different friction states according to real-time supervision simultaneously, have increased the function abundance of device.
Description
Technical Field
The invention relates to the technical field of hydraulic element testing, in particular to a friction and wear testing device of a hydraulic pump flow distribution pair with an online monitoring function.
Background
The axial plunger pump is one of the hydraulic power elements widely used in modern hydraulic transmission, has the advantages of high pressure, high rotating speed, small volume, convenient variable control and the like, and is widely used in various fields of engineering machinery, hoisting transportation, metallurgy, ships, aviation and the like. Under the requirement of modern hydraulic transmission, the axial plunger pump gradually develops towards the direction of high rotating speed, high pressure and large displacement. The plunger pump is provided with a plurality of groups of friction kinematic pairs, wherein the flow distribution pair is the friction kinematic pair which is most prone to wear, the wear of the flow distribution pair can cause the plunger pump to have large leakage, insufficient output flow, low output pressure, large noise and pressure fluctuation, the pump body generates heat, the oil temperature rises and other faults, the cylinder body and the flow distribution plate are sintered to cause the pump to be incapable of rotating in serious conditions, and the friction and wear condition of the flow distribution pair is researched to reduce the fault rate of the axial plunger pump and improve the service life of the axial plunger pump. At present, the friction and wear testing device of the flow distribution pair is mainly researched at home and abroad by the following steps:
model pump testing device. One such device has been developed at Zhejiang university. The device can carry out the friction and wear test on the basis of not changing the base structure of the pump/motor. The device keeps the main structure in the pump, the testing environment is very close to the real working condition of the pump, but the structure is complex, the disassembly and the assembly are difficult to maintain, and the long-time abrasion test is difficult to realize; the input flow distribution pair of the low-pressure oil way is lacked, so that the eccentric wear of the flow distribution pair is more serious, and the error of a test result is increased;
to mill formula testing arrangement. Such devices are designed with reference to disc-to-disc or pin-to-disc grinding in mills. A device of the type is developed by Nanjing aerospace university based on a disc-to-disc grinding concept. However, the device is also only provided with a high-pressure oil area, and is different from the high-pressure and low-pressure environment of the pump; the open shell structure ensures that the pressure in a high-pressure area is not high; the Zhejiang university develops a device of the type based on the idea of pin disc counter-grinding, loads by using a heavy object according to the lever principle, adjusts the position of a pin and can realize the wear test of different positions, but the loading mode of the heavy object makes the loading force smaller, and meanwhile, the pin disc counter-grinding and the friction and wear of a flow distribution pair have larger difference, and the test result is not reliable enough.
Disclosure of Invention
The invention provides a friction and wear testing device of a hydraulic pump flow distribution pair with an online monitoring function, and aims to solve the problem of large detection result error in the prior art.
In order to achieve the above object, an embodiment of the present invention provides a friction wear testing apparatus for a flow distribution pair of a hydraulic pump with an online monitoring function, including:
the simulation part comprises a shell, a left end cover and a right end cover which are arranged on two sides of the shell, a moving component and a rotating component are arranged in the shell, the moving component comprises a loading plate, an outward extending shaft of the loading plate penetrates through the left end cover and is positioned outside the shell, a valve plate is fixed on the part, positioned in the shell, of the loading plate, the rotating component comprises a friction plate and a main shaft in transmission connection with the friction plate, the main shaft penetrates through the right end cover and keeps the friction plate positioned in the shell, and the friction plate and the valve plate form a spherical valve pair; the right end cover is provided with two oil inlet pore passages capable of being connected with a high-pressure oil source to push the friction disc to move towards the direction of the valve plate, the loading disc is provided with two first through holes, adapters are arranged on the two first through holes and are used for being communicated with an external oil source, the loading disc is further provided with two first waist-shaped blind holes, the first through holes are correspondingly arranged in the first waist-shaped blind holes, a low-pressure area of the valve plate is provided with one first waist-shaped through hole, a high-pressure area of the valve plate is provided with three second waist-shaped through holes, and the passing area of the first waist-shaped through holes is larger than that of the second waist-shaped through holes; the flow distribution plate is provided with temperature detection holes on one surface back to the friction plate, the temperature detection holes are blind holes, and the temperature detection holes are annularly arranged at the inner sealing belt and the outer sealing belt of the flow distribution plate; three displacement detection tables are uniformly distributed on the valve plate in the circumferential direction;
a push portion for coupling with the moving member to adjust a gap between the port plate and the friction plate;
the rotating part is used for driving the main shaft to rotate;
and the detection part comprises a temperature detection sensor arranged in the temperature detection hole, a displacement detection sensor arranged on the displacement detection platform and a six-component force sensor connected with the loading disc and the pushing part.
Preferably, the oil inlet duct comprises a main duct and branch ducts branched from the main duct, the main duct extends from the outer surface of the right end cover to the inside and is sealed at a position close to the center of the right end cover, the main duct is communicated with a first oil path and a second oil path, the path directions of the first oil path and the second oil path are the same as the axial direction of the main shaft, outlets of the first oil path and the second oil path are arranged on one side of the right end cover facing the friction disc, the distance between the outlets of the first oil path and the second oil path and the center of the right end cover is smaller than the radius of the friction disc, the tail end of each branch duct is a through hole, the path directions of the branch ducts are the same as the radial direction of the right end cover, and the two oil inlet ducts are arranged in a central symmetry manner relative to the center of the right end cover.
Preferably, the rotating member further comprises a rotating shaft sleeve, the distances from the outlets of the first oil path and the second oil path to the center point of the right end cover are respectively smaller than the radius of the rotating shaft sleeve, the inner ring of the rotating shaft sleeve is in transmission connection with the main shaft, the friction disc is arranged on the rotating shaft sleeve, and the outer ring of the rotating shaft sleeve is in clearance fit with the right shell.
Preferably, the rotary shaft sleeve is connected with the main shaft through a spline, and a disc spring for providing axial pretightening force is further arranged between the rotary shaft sleeve and the main shaft.
Preferably, the friction disc is provided with a plurality of dummy blind holes on one surface facing the port plate.
Preferably, the rotating part is a spindle driving motor, and the spindle driving motor is connected with the spindle through a coupler.
Preferably, the pushing part comprises a base, a support frame is arranged on the base, a hydraulic cylinder is arranged on the support frame, one end of the hydraulic cylinder is rotatably connected with the support frame, the other end of the hydraulic cylinder is fixedly connected with the support frame, a piston rod of the hydraulic cylinder can extend out of the support frame and is connected with the six-component force sensor, and the other end of the six-component force sensor is connected with the loading disc.
Preferably, the six-component force sensor is hinged with the loading disc and a piston rod of the hydraulic cylinder.
The scheme of the invention has the following beneficial effects:
in the application, the idea of grinding is designed based on the disc, so that the principle is reliable, the structure is simple and compact, the functions are complete, and the assembly and disassembly are convenient; the supporting mode of high-pressure oil static pressure supporting is adopted, so that the supporting effect is stable, the friction disc rotates stably, a larger supporting force can be generated, and higher testing pressure is achieved; a bearing supporting main shaft is omitted, so that the damage of the bearing is avoided, the device can be tested for a long time, and the test stability and the service life are improved; the displacement sensor and the temperature sensor can monitor the testing process on line, know the current friction state in real time through the thickness of the lubricating oil film and a temperature field, and simultaneously can realize testing under different friction states by adjusting the oil pressure and the loading force according to real-time monitoring, thereby increasing the function richness of the device; the integrity of an oil film of the flow distribution pair is not damaged when the two sensors are installed, and the influence of the structural change of the flow distribution pair on the friction and the abrasion is eliminated, so that the test result is more real and reliable.
Drawings
FIG. 1 is an overall schematic view of the present invention;
FIG. 2 is a cross-sectional view of a simulation part;
FIG. 3 is a schematic view of the port plate facing the friction plate;
FIG. 4 is a perspective view of the position of the oil intake gallery in the right end cover;
FIG. 5 is a schematic illustration of a friction disk configuration;
fig. 6 is a schematic view of the structure of the loading tray.
[ description of reference ]
1-simulation part, 10-shell, 11-left end cover, 12-right end cover, 13-moving component, 14-rotating component, 131-loading plate, 1311-first through hole, 1312-adapter, 1313-first waist-shaped blind hole, 1314-flow distribution positioning block, 1315-oil through pipe, 132-flow distribution plate, 1321-first waist-shaped through hole, 1322-second waist-shaped through hole, 1323-temperature detection hole, 1324-displacement detection platform, 141-friction disc, 142-rotating shaft sleeve, 143-disc spring, 144-imitation blind hole, 145-friction positioning block, 146-main shaft, 121-oil inlet channel and 147-pretightening force bearing;
2-pushing part, 21-base, 22-supporting frame, 23-six component force sensor;
3-rotating part, 31-main shaft driving motor, 32-coupling.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-6, an embodiment of the present invention provides a friction wear testing device for a flow distribution pair of a hydraulic pump with an online monitoring function, which includes a simulation portion 1, a detection portion, a pushing portion 2 and a rotating portion 3, wherein the simulation portion 1 is used for simulating different internal environments of a pump body, the detection portion is used for detecting various parameters of the simulated internal environment of the pump body, the pushing portion 2 is used for forming the internal environment of the pump body under various conditions, and the rotating portion 3 simulates the working state of the pump body.
Specifically, the simulation part 1 includes a housing 10, and a left end cap 11 and a right end cap 12 disposed at both sides of the housing 10, a moving member 13 and a rotating member 14 are disposed inside the housing 10, wherein the moving member 13 includes a loading plate 131, an outward extending shaft of the loading plate 131 passes through the left end cap 11 and is located outside the housing 10, a port plate 132 is disposed on the loading plate 131, the port plate 132 is located inside the housing 10, the port plate 132 is detachably mounted on the loading plate 131 through a port positioning block 1314, and multi-dimensional testing can be achieved by replacing different port plates 132 and port positioning blocks 1314. The rotating member 14 includes a friction disc 141 and a main shaft 146 in transmission connection with the friction disc 141, wherein the main shaft 146 penetrates through the right end cover 12 and ensures that the friction disc 141 is located in the housing 10, and the friction disc 141 and the port plate 132 form a spherical port pair.
Two first through holes 1311 are further provided in the loading disc 131, preferably, two first through holes 1311 are provided perpendicular to the loading disc 131, and an adapter 1312 is provided in each first through hole 1311, and the adapter 1312 may communicate with an external oil source through an oil pipe 1315. The oil tube 1315 may pass through the left end cap 11 to facilitate communication with the swivel 1312. A first waist-shaped blind hole 1313 is further provided on the side of the loading plate 131 facing the port plate 132, and the first through hole 1311 is provided in the first waist-shaped blind hole 1313.
Generally, the port plate 132 is functionally divided into a high pressure region, a low pressure region and a high-low pressure transition region, in this application, the low pressure region of the port plate 132 is provided with one first kidney-shaped through hole 1322, the high pressure region of the port plate 132 is provided with three second kidney-shaped through holes 1321, and the passing area of the first kidney-shaped through hole 1322 is larger than that of the second kidney-shaped through hole 1321.
A temperature detection hole 1323 is arranged on a side of the port plate 132 facing away from the friction plate 141, and the temperature detection hole 1323 is a blind hole. In order to guarantee that the temperature detection hole 1324 is convenient to assemble various sensors, a thread structure can be adopted for installation, it needs to be pointed out that the inner wall of the pressure detection hole 1323 is preferably provided with fine threads, the fine threads are convenient to fix the pressure detection sensor in the pressure detection hole 1323, and the fine threads also play a certain sealing role and reduce the influence of oil leakage of the through hole on an oil film.
Generally, the valve plate 132 is structurally an outer sealing band outside the first kidney-shaped through hole 1321, and an inner sealing band inside the first kidney-shaped through hole 1321, in this application, the inner and outer sealing bands are provided with a plurality of temperature detection holes 1323, the temperature detection holes 1323 located at the inner sealing band and the temperature detection holes 1323 located at the outer sealing band are both arranged in an annular shape, and the circle centers coincide. Three displacement detection platforms 1324 are protruded from the outer edge of the port plate 132, and the included angle between any two adjacent displacement detection platforms 1324 is 120 degrees.
The right end cover 12 is further provided with an oil inlet passage 121, the oil inlet passage 121 is communicated with an external high-pressure oil source, and the high-pressure oil source enters the housing 10 through the oil inlet passage 121 to push the friction disc 141 to move towards the thrust plate 132. Preferably, the oil inlet duct 121 includes a main duct and a branch branched from the main duct, the main duct extends from the outer surface of the right end cover 12 to the inside and is closed near the center of the right end cover 12, the main duct is communicated with a first oil path and a second oil path, and the path direction of the first oil path and the second oil path is the same as the axial direction of the main shaft 146. The outlets of the first oil path and the second oil path are arranged on one side of the right end cover 12 facing the friction disc 141, the distance from the center of the right end cover 12 is smaller than the radius of the friction disc 141, the tail ends of the branch paths are through holes, and the path directions of the branch paths are the same as the radial direction of the right end cover, so that a high-pressure oil source can vertically act on the main shaft after flowing through the branch paths. The oil inlet pore channels are arranged in two numbers and are arranged in a centrosymmetric mode about the center of the right end cover.
The distance between the two outlets to the centre of the right end cap 12 is less than the radius of the friction disc 141 to facilitate the direct application of a high pressure oil source to the friction disc 141. The two oil inlet ducts 121 are arranged in a central symmetry manner, static pressure support is formed on the friction disc 141, the static pressure support mode works depending on the pressure of a high-pressure oil source, the relative movement speed of the friction disc 141 and the flow distribution disc 132 is not depended on, and the high-pressure oil source only works normally, so that the device can be used for testing under the condition of more rotating speeds.
The aforementioned sensing part includes a temperature sensing sensor disposed in the temperature sensing hole 1323, a displacement sensing sensor disposed on the displacement sensing stage 1324, and a six-component force sensor 23 connecting the loading plate 131 and the pushing part 2. The displacement detection sensor is an eddy current micro-displacement sensor, non-contact measurement is realized, the influence on the rotary motion of the flow distribution pair is avoided, and the device has good reliability, wide measurement range, high sensitivity and high resolution; the temperature detection sensor is a thermocouple type temperature sensor, the structure is small and exquisite, the installation is convenient, and the measured data can be combined with the heat conduction coefficient of oil and metal through an external industrial personal computer to calculate the temperature field of the oil film between the flow distribution pairs.
The rotating part 3 is used for driving the main shaft 146 to rotate, the working state of the pump body is simulated, and the pushing part 2 is used for being connected with the moving part to adjust the size of the gap between the valve plate 132 and the friction disc 141, so that different friction and wear test conditions can be met.
In addition, the temperature detection sensor is arranged in the blind hole, so that a test result can be obtained through the calculation of the heat conduction coefficients of the oil liquid and the metal, the damage to the oil film formed by the valve plate 132 and the friction disc 141 can be reduced as much as possible on the premise of achieving the test purpose, the error caused by the structural change is further reduced, and different working conditions are simulated more truly.
Furthermore, in order to better fit the internal environments of different pump bodies, a dummy blind hole 144 is further formed in one surface, facing the port plate 132, of the friction disc 141, and the dummy blind hole 144 is made according to the structures of different pumps and is made by imitating the bottom structure of a cylinder body.
The above-mentioned pushing part 2 not only has a function of adjusting the gap between the port plate 132 and the friction plate 141, but also has another layer function. Specifically, when oil is introduced into the housing 10, the oil pushes the valve plate 132 and the wiping plate to axially separate from each other, which causes a change in the detection environment and affects the detection effect. Thus, in the present embodiment, a push portion 2 having a good effect is also provided. This pushing part 2 includes base 21, is provided with support frame 22 on base 21, is provided with the pneumatic cylinder on support frame 22, the one end and the support frame 22 fixed connection of pneumatic cylinder, and the other end articulates on support frame 22. As the hydraulic cylinder operates, the piston rod of the hydraulic cylinder extends out of the support bracket 22. The piston rod of the hydraulic cylinder is also hinged with the six-component force sensor 23, and the other end of the six-component force sensor 23 is hinged with the loading disc 131.
The six-component force sensor 23 can simultaneously detect the pressure in three directions of the space rectangular coordinate system and the torque around three coordinate axes, namely, the separation force generated by the oil film and the friction torque between the flow distribution pairs can be measured, and the friction coefficient between the flow distribution pairs can be calculated by the industrial personal computer.
In order to better connect the main shaft 146 and the friction disk 141 in a driving manner, a rotating shaft sleeve 142 is further provided between the main shaft 146 and the right housing 10, an inner ring of the rotating shaft sleeve 142 is connected in a driving manner with the main shaft 146, the friction disk 141 is provided on the rotating shaft sleeve 142, an outer ring of the rotating shaft sleeve 142 is provided in the right end cover 12, and the right end cover 12 supports the rotating shaft sleeve 142. Preferably, the friction disc 141 is mounted on the rotation sleeve 142 by a friction locating block 145. When a high-pressure oil source forms a static pressure supporting effect on a matching surface of the connecting shaft sleeve and the right end cover 12, a loading force is applied to the loading disc 131 by the pushing part 2 after bearing an oil film separating force, a bias load force generated by an external high-pressure and low-pressure oil source and a radial force generated by the self weight of parts, the loading force is balanced with the separating force generated by an oil film between the flow distribution pairs, test conditions of different friction states can be adjusted through detection data of a displacement detection sensor, and a real-time friction state can be roughly judged through the displacement detection sensor and a temperature detection sensor in the test process.
The main shaft 146 is connected with the rotary shaft sleeve 142 through a spline, and a disc spring 143 for providing axial pretightening force is further arranged between the rotary shaft sleeve 142 and the main shaft 146 to ensure that the rotary shaft sleeve 142 and the main shaft 146 are pretightened in the axial direction. The main shaft 146 is further provided with a pretightening force bearing 147, the pretightening force bearing 147 is abutted against the inner wall of the right end cover 12, and the pretightening force bearing 147 is used for bearing the pressing force of the belleville spring 143 to limit the axial position of the main shaft 146 and prevent the belleville spring 143 from bouncing off.
In the present application, the sealing performance between the main shaft 146 and the housing 10 should be ensured to prevent oil leakage. The sealing treatment can be performed by the prior art.
An oil overflow hole is also arranged in the working space of the valve plate 132 and the friction disc 141, and the oil overflow hole is externally connected with a flow meter to measure the leakage flow between the valve pairs.
In the application, the idea of grinding is designed based on the disc, so that the principle is reliable, the structure is simple and compact, the functions are complete, and the assembly and disassembly are convenient; a supporting mode of high-pressure oil static pressure supporting is adopted, so that the supporting effect is stable, the friction disc 141 rotates stably, a large supporting force can be generated, and higher testing pressure is achieved; the bearing supporting main shaft 146 is omitted, so that the damage of the bearing is avoided, the device can be tested for a long time, and the test stability and the service life are improved; the loading mode of hydraulic cylinder loading is adopted, the loading is stable and reliable, larger loading force can be generated, and higher test pressure can be achieved; the device is provided with the displacement sensor and the temperature sensor, so that the testing process can be monitored on line, the current friction state can be known in real time through the thickness and the temperature field of the lubricating oil film, meanwhile, the tests under different friction states can be realized by adjusting the oil pressure and the loading force according to the real-time monitoring, and the function richness of the device is increased; the integrity of an oil film of the flow distribution pair is not damaged when the two sensors are installed, and the influence of the structural change of the flow distribution pair on the friction and the abrasion is eliminated, so that the test result is more real and reliable; the friction disc 141 is manufactured with an imitated blind hole 144 according to the bottom structure of the cylinder body, pressure change can be formed in the oil filling and oil discharging processes, pressure pulsation of the pump can be simulated to a certain extent, and the pressure pulsation is closer to the real working condition of the flow distribution pair; the closed shell 10 provides reliable environmental guarantee for high pressure test, and meets the requirements of more test conditions; the customized flow distribution positioning block 1314 and the friction positioning block 145 are used for positioning and mounting the flow distribution plate 132 and the friction disc 141, so that the parts can be conveniently disassembled, assembled and replaced, the test requirements of multiple size series and multiple material combinations are met, and the method has important value in the aspect of friction and wear test of a flow distribution pair of a large-displacement hydraulic pump.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A hydraulic pump flow distribution pair friction and wear testing device with an online monitoring function is characterized by comprising:
the simulation part (1) comprises a shell (10), a left end cover (11) and a right end cover (12) which are arranged on two sides of the shell (10), a moving component (13) and a rotating component (14) are arranged in the shell (10), the moving component (13) comprises a loading disc (131), an outward extending shaft of the loading disc (131) penetrates through the left end cover (11) and is positioned outside the shell (10), a flow distribution disc (132) is fixed on a part, positioned in the shell (10), of the loading disc (131), the rotating component (14) comprises a friction disc (141) and a main shaft (146) in transmission connection with the friction disc (141), the main shaft (146) penetrates through the right end cover (12) and keeps the friction disc (141) positioned in the shell (10), and the friction disc (141) and the flow distribution disc (132) form a spherical flow distribution pair; the right end cover (12) is provided with two oil inlet channels (121) capable of being connected with a high-pressure oil source to push the friction disc (141) to move towards the flow distribution disc (132), the loading disc (131) is provided with two first through holes (1311), the two first through holes (1311) are provided with adapters (1312), the adapters (1312) are used for being communicated with an external oil source, the loading disc (131) is further provided with two first waist-shaped blind holes (1313), the first through holes (1311) are correspondingly arranged in the first waist-shaped blind holes (1313), a low-pressure area of the flow distribution disc (132) is provided with a first waist-shaped through hole (1322), a high-pressure area of the flow distribution disc (132) is provided with three second waist-shaped through holes (1321), and the passing area of the first waist-shaped through hole (1322) is larger than that of the second waist-shaped through hole (1321); the valve plate (132) is provided with temperature detection holes (1323) on one surface facing away from the friction disc (141), the temperature detection holes (1323) are blind holes, and the temperature detection holes (1323) are annularly arranged at the inner sealing belt and the outer sealing belt of the valve plate (132); three displacement detection platforms (1324) are uniformly distributed on the valve plate (132) in the circumferential direction;
a push portion (2) for connecting with the moving member (13) to adjust a gap between the port plate (132) and the friction plate (141);
the rotating part (3) is used for driving the main shaft (146) to rotate;
and a sensing part including a temperature sensing sensor disposed in the temperature sensing hole 1323, a displacement sensing sensor disposed on the displacement sensing stage 1324, and a six-component force sensor 23 connecting the loading tray 131 and the pushing part 2.
2. The friction wear testing device of the hydraulic pump flow distribution pair with the online monitoring function as claimed in claim 1, wherein the oil inlet hole channel (121) comprises a main channel and branches branched from the main channel, the main channel extends inwards from the outer surface of the right end cover (12) and is closed at a position close to the center of the right end cover (12), the main channel is communicated with a first oil channel and a second oil channel, the path direction of the first oil channel and the path direction of the second oil channel are the same as the axial direction of the main shaft (146), the outlets of the first oil channel and the second oil channel are arranged at one side of the right end cover (12) facing the friction disc (141) and the distance from the center of the right end cover (12) is smaller than that of the friction disc (141), the branches end in through holes, the path direction of the branches is the same as the radial direction of the right end cover, and two oil inlet hole channels (121) are arranged, the right end cover is arranged in central symmetry with the center of the right end cover.
3. The hydraulic pump flow distribution pair friction wear testing device with the online monitoring function as recited in claim 2, characterized in that the rotating member (14) further comprises a rotating shaft sleeve (142), the distance from the outlet of the first oil path and the outlet of the second oil path to the center point of the right end cover (12) is respectively smaller than the radius of the rotating shaft sleeve (142), the inner ring of the rotating shaft sleeve (142) is in transmission connection with a main shaft (146), the friction disc (141) is arranged on the rotating shaft sleeve (142), and the outer ring of the rotating shaft sleeve (142) is in clearance fit with the right housing (10).
4. The friction and wear testing device for the hydraulic pump flow distribution pair with the online monitoring function as recited in claim 3, wherein the rotating shaft sleeve (142) is in splined connection with the main shaft (146), and a belleville spring (143) providing axial pre-tightening force is further arranged between the rotating shaft sleeve (142) and the main shaft (146).
5. The hydraulic pump flow distribution pair friction wear testing device with online monitoring function as claimed in claim 1, characterized in that the friction disc (141) is provided with a plurality of dummy blind holes (144) on the surface facing the flow distribution disc (132).
6. The friction wear testing device of the hydraulic pump distribution pair with the online monitoring function according to claim 1, characterized in that the rotating part (3) is a spindle driving motor (31), and the spindle driving motor (31) is connected with the spindle (146) through a coupler (32).
7. The hydraulic pump flow distribution pair friction and wear testing device with the online monitoring function as recited in claim 1, wherein the pushing portion (2) comprises a base (21), a supporting frame (22) is disposed on the base (21), a hydraulic cylinder is disposed on the supporting frame (22), one end of the hydraulic cylinder is rotatably connected with the supporting frame (22), the other end of the hydraulic cylinder is fixedly connected with the supporting frame (22), a piston rod of the hydraulic cylinder can extend out of the supporting frame (22) and is connected with the six-component force sensor (23), and the other end of the six-component force sensor (23) is connected with a loading disc (131).
8. The hydraulic pump flow distribution pair friction and wear testing device with the online monitoring function as recited in claim 7, characterized in that the six-component force sensor (23) is hinged with the loading disc (131) and the piston rod of the hydraulic cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111470025.4A CN114166676B (en) | 2021-12-03 | 2021-12-03 | Hydraulic pump flow distribution pair friction and wear testing device with online monitoring function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111470025.4A CN114166676B (en) | 2021-12-03 | 2021-12-03 | Hydraulic pump flow distribution pair friction and wear testing device with online monitoring function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114166676A true CN114166676A (en) | 2022-03-11 |
| CN114166676B CN114166676B (en) | 2024-01-30 |
Family
ID=80482914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111470025.4A Active CN114166676B (en) | 2021-12-03 | 2021-12-03 | Hydraulic pump flow distribution pair friction and wear testing device with online monitoring function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114166676B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115077759A (en) * | 2022-06-15 | 2022-09-20 | 河南科技大学 | Measuring equipment and measuring method for dynamic friction torque of large-size bearing |
| CN117307474A (en) * | 2023-10-18 | 2023-12-29 | 浙江大学 | Test bed and test system for testing oil film characteristics of flow distribution pair |
| CN115077759B (en) * | 2022-06-15 | 2024-06-04 | 河南科技大学 | Measuring equipment and measuring method for dynamic friction moment of large-size bearing |
Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1570605A (en) * | 2004-05-13 | 2005-01-26 | 浙江大学 | Lubricating property testing device for port plate pair of axial plunger pump |
| CN1588057A (en) * | 2004-08-06 | 2005-03-02 | 浙江大学 | Axial plunger pump piston shoe auxiliary lubrication characteristic test device |
| CN101290209A (en) * | 2008-05-23 | 2008-10-22 | 中国矿业大学 | Heavy pressure micro-gap lubrication test machine |
| CN201206974Y (en) * | 2008-05-23 | 2009-03-11 | 中国矿业大学 | High-pressure microgap lubricating test machine |
| CN101709953A (en) * | 2009-12-03 | 2010-05-19 | 清华大学 | Lubricant film thickness measuring instrument |
| CN102312830A (en) * | 2011-10-13 | 2012-01-11 | 哈尔滨工业大学 | Performance testing device for piston shoe in axial plunger pump |
| CN204177693U (en) * | 2014-10-27 | 2015-02-25 | 贵州大学 | High pressure axial plunger pump Slipper coupling friction performance testing device |
| CN104458466A (en) * | 2014-10-27 | 2015-03-25 | 贵州大学 | Friction performance testing device for slipper pair of high-pressure axial plunger pump |
| CN106595462A (en) * | 2016-12-29 | 2017-04-26 | 北京理工大学 | Axial plunger pump flow distribution pair test oil membrane thickness test system |
| CN108266361A (en) * | 2017-12-01 | 2018-07-10 | 北京理工大学 | A kind of multi-functional axial plunger pump test prototype of research and test system |
| CN207634282U (en) * | 2017-12-01 | 2018-07-20 | 北京理工大学 | A kind of multi-functional axial plunger pump test prototype of research and test system |
| CN108896425A (en) * | 2018-05-14 | 2018-11-27 | 吉林大学 | A kind of high-speed overload friction-wear detecting apparatus and its test method |
| CN209839001U (en) * | 2019-03-27 | 2019-12-24 | 中南大学 | Oil film clutch with automatic oil supply device |
| CN110836178A (en) * | 2019-12-13 | 2020-02-25 | 北京航空航天大学 | Comprehensive test device for plunger pump flow distribution pair |
| CN111472955A (en) * | 2020-03-26 | 2020-07-31 | 浙江大学 | External swash plate plunger pump pre-pressing force and variable adjusting device |
| CN111946609A (en) * | 2020-08-24 | 2020-11-17 | 太原科技大学 | Method for measuring thickness of oil film of flow distribution pair |
| CN113008718A (en) * | 2021-03-23 | 2021-06-22 | 太原科技大学 | Axial plunger pump flow distribution pair test device and method |
| CN113188892A (en) * | 2021-05-08 | 2021-07-30 | 杭州电子科技大学 | Friction wear testing machine with medium injection and compression functions and testing method thereof |
| CN213870241U (en) * | 2020-11-26 | 2021-08-03 | 江苏欧盛液压科技有限公司 | Plunger pump sphere flow distribution structure |
| CN214470603U (en) * | 2021-04-12 | 2021-10-22 | 河南科技大学 | Plunger pump flow distribution pair oil film testing device with film thickness feedback control function |
-
2021
- 2021-12-03 CN CN202111470025.4A patent/CN114166676B/en active Active
Patent Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1570605A (en) * | 2004-05-13 | 2005-01-26 | 浙江大学 | Lubricating property testing device for port plate pair of axial plunger pump |
| CN1588057A (en) * | 2004-08-06 | 2005-03-02 | 浙江大学 | Axial plunger pump piston shoe auxiliary lubrication characteristic test device |
| CN101290209A (en) * | 2008-05-23 | 2008-10-22 | 中国矿业大学 | Heavy pressure micro-gap lubrication test machine |
| CN201206974Y (en) * | 2008-05-23 | 2009-03-11 | 中国矿业大学 | High-pressure microgap lubricating test machine |
| CN101709953A (en) * | 2009-12-03 | 2010-05-19 | 清华大学 | Lubricant film thickness measuring instrument |
| CN102312830A (en) * | 2011-10-13 | 2012-01-11 | 哈尔滨工业大学 | Performance testing device for piston shoe in axial plunger pump |
| CN204177693U (en) * | 2014-10-27 | 2015-02-25 | 贵州大学 | High pressure axial plunger pump Slipper coupling friction performance testing device |
| CN104458466A (en) * | 2014-10-27 | 2015-03-25 | 贵州大学 | Friction performance testing device for slipper pair of high-pressure axial plunger pump |
| CN106595462A (en) * | 2016-12-29 | 2017-04-26 | 北京理工大学 | Axial plunger pump flow distribution pair test oil membrane thickness test system |
| CN207634282U (en) * | 2017-12-01 | 2018-07-20 | 北京理工大学 | A kind of multi-functional axial plunger pump test prototype of research and test system |
| CN108266361A (en) * | 2017-12-01 | 2018-07-10 | 北京理工大学 | A kind of multi-functional axial plunger pump test prototype of research and test system |
| CN108896425A (en) * | 2018-05-14 | 2018-11-27 | 吉林大学 | A kind of high-speed overload friction-wear detecting apparatus and its test method |
| CN209839001U (en) * | 2019-03-27 | 2019-12-24 | 中南大学 | Oil film clutch with automatic oil supply device |
| CN110836178A (en) * | 2019-12-13 | 2020-02-25 | 北京航空航天大学 | Comprehensive test device for plunger pump flow distribution pair |
| CN111472955A (en) * | 2020-03-26 | 2020-07-31 | 浙江大学 | External swash plate plunger pump pre-pressing force and variable adjusting device |
| CN111946609A (en) * | 2020-08-24 | 2020-11-17 | 太原科技大学 | Method for measuring thickness of oil film of flow distribution pair |
| CN213870241U (en) * | 2020-11-26 | 2021-08-03 | 江苏欧盛液压科技有限公司 | Plunger pump sphere flow distribution structure |
| CN113008718A (en) * | 2021-03-23 | 2021-06-22 | 太原科技大学 | Axial plunger pump flow distribution pair test device and method |
| CN214470603U (en) * | 2021-04-12 | 2021-10-22 | 河南科技大学 | Plunger pump flow distribution pair oil film testing device with film thickness feedback control function |
| CN113188892A (en) * | 2021-05-08 | 2021-07-30 | 杭州电子科技大学 | Friction wear testing machine with medium injection and compression functions and testing method thereof |
Non-Patent Citations (4)
| Title |
|---|
| 杨华勇, 艾青林, 周华: "轴向柱塞泵配流副润滑特性的研究进展", 《中国机械工程》, no. 17, pages 1587 - 1589 * |
| 王彬;周华;杨华勇;: "轴向柱塞泵平面配流副润滑特征参数实时测量", 《农业机械学报》, vol. 40, no. 09, pages 210 - 212 * |
| 艾青林, 周华, 张增猛, 杨华勇: "轴向柱塞泵配流副与滑靴副润滑特性试验系统的研制", 《液压与气动》, no. 11, pages 24 - 27 * |
| 金耀;蒋明华;贺欣;夏毅敏;罗春雷;: "液压缸综合性能测控平台开发及实验研究", 《合肥工业大学学报(自然科学版)》, vol. 39, no. 09, pages 1164 - 1169 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115077759A (en) * | 2022-06-15 | 2022-09-20 | 河南科技大学 | Measuring equipment and measuring method for dynamic friction torque of large-size bearing |
| CN115077759B (en) * | 2022-06-15 | 2024-06-04 | 河南科技大学 | Measuring equipment and measuring method for dynamic friction moment of large-size bearing |
| CN117307474A (en) * | 2023-10-18 | 2023-12-29 | 浙江大学 | Test bed and test system for testing oil film characteristics of flow distribution pair |
| CN117307474B (en) * | 2023-10-18 | 2024-05-28 | 浙江大学 | Test bed and test system for testing oil film characteristics of flow distribution pair |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114166676B (en) | 2024-01-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108519235B (en) | Pneumatic turbine driving type double-rotor test bed | |
| CN106595462B (en) | A kind of pair in axial piston pump test oil film thickness measurement system | |
| CN107560855A (en) | A kind of filmatic bearing dynamic and static state performance experimental rig | |
| CN108896425B (en) | High-speed heavy-load friction and wear testing device and testing method thereof | |
| CN106769042B (en) | Cylindrical roller bearing dual-rotor testing machine | |
| CN111811817B (en) | High-precision fluid dynamic pressure sliding bearing comprehensive performance test platform | |
| CN114152734B (en) | On-line testing device for lubricating characteristic of flow distribution pair of hydraulic pump | |
| CN101363787A (en) | Slow-speed heavy-load fibrage composite self-lubricating bearing strip performance test machine | |
| CN114166676B (en) | Hydraulic pump flow distribution pair friction and wear testing device with online monitoring function | |
| CN1235032C (en) | Lubricating property testing device for port plate pair of axial plunger pump | |
| CN102706551B (en) | Lip seal test experiment table | |
| CN113405735B (en) | High-speed helium end face sealing test device for liquid rocket engine turbine pump | |
| CN114739563B (en) | Radial membrane pressure distribution testing device of movable mechanical seal of stationary ring | |
| CN110567705A (en) | Distribution friction pair performance simulation test device based on floating disc | |
| CN114646466B (en) | Rolling bearing test equipment with load and assembly double simulation | |
| CN202372319U (en) | Gas sealing experimental device | |
| CN110426207B (en) | Comprehensive performance test bench for sliding bearing and thrust bearing | |
| CN109357870B (en) | Radial air bearing performance test machine | |
| CN107843432B (en) | Dynamic stiffness measuring device for bearing | |
| CN112304610B (en) | Bearing test device for low temperature | |
| CN112303122B (en) | Micro-friction static pressure disc for test system | |
| CN111828437B (en) | Clutch centrifugal oil pressure testing device capable of adjusting axial space | |
| CN211206116U (en) | Wear test device for friction pair | |
| CN209690099U (en) | A kind of hydrodynamic lubrication annulus frictional wear experimental device | |
| CN217738650U (en) | Comprehensive performance test platform for liquid metal lubricating bearing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |