CN114152734B - On-line testing device for lubricating characteristic of flow distribution pair of hydraulic pump - Google Patents
On-line testing device for lubricating characteristic of flow distribution pair of hydraulic pump Download PDFInfo
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- CN114152734B CN114152734B CN202111470043.2A CN202111470043A CN114152734B CN 114152734 B CN114152734 B CN 114152734B CN 202111470043 A CN202111470043 A CN 202111470043A CN 114152734 B CN114152734 B CN 114152734B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; viscous liquids; paints; inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/30—Oils, i.e. hydrocarbon liquids for lubricating properties
Abstract
The invention provides an on-line testing device for lubrication characteristics of a hydraulic pump flow distribution pair, which relates to the technical field of hydraulic element testing and comprises a simulation part, a rotation part, a pushing part and a detection part. The detection part is arranged on the valve plate, so that the oil film characteristic, the pressure field and the temperature field can be tested on line at the same time, and the real-time data acquisition, summarization and processing can be realized by combining with an industrial personal computer, so that the test result is clear; and the detection part is arranged on the non-rotating valve plate, so that the influence of rotation on the detection part is eliminated, and the detection result is more real and reliable.
Description
Technical Field
The invention relates to the technical field of hydraulic element testing, in particular to an online testing device for the lubricating property of a flow distribution pair of a hydraulic pump.
Background
The axial plunger pump is one of the most important power elements in the field of engineering machinery, and plays a key role in shield machines, excavators and the like. With the continuous development of the industrial industry, the axial plunger pump shows the development trend of high rotating speed, high pressure and large displacement. When the flow distribution pair in the axial plunger pump moves, an oil film is formed between the flow distribution pair to play a role in lubrication, but if the sealing effect is deteriorated due to too thick oil film, the leakage between the flow distribution pair is increased, and the efficiency of the axial plunger pump is reduced; if the thickness is too thin, the lubrication effect is poor, and the valve plate and the cylinder body are abnormally abraded. The leakage and lubrication of the flow distribution pair directly influence the performance of the pump, so that the research on the lubrication characteristics of the flow distribution pair has important value. At present, the domestic and foreign research on the lubricating characteristic testing device of the distribution pair mainly comprises the following devices:
1. model pump type testing device. One such device has been developed at Zhejiang university. The device can test the oil film characteristic of the plunger pair rotating at high speed in the device by adopting a wireless remote measurement method on the basis of not changing the base structure of the pump/motor. The device keeps the main structure in the pump, the test environment is very close to the real working condition of the pump, but the structure is complex, and the disassembly, the assembly and the maintenance are difficult; the rotation of the plunger has a large influence on the sensor and easily damages the sensor; the use of miniature sensors and wireless transmission devices makes the devices more costly.
2. A peel-off test apparatus. The design idea of the device is to strip the flow distribution pair from the pump and use external equipment to simulate the working environment of the flow distribution pair in the pump. One such device was developed by Nanjing aerospace university. The device can simulate the working environment of oil film generation and high-pressure unbalance loading and test parameters such as friction torque, oil film bearing force and the like. However, the device only designs 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 the high-pressure area is not high; the oil film property online test function is lacked. One such type of device has also been developed at Zhejiang university. The device is a closed shell, the pressure in a high-pressure area can reach a higher value, the micro-displacement sensors are arranged on the valve plate in parallel, and parameters such as friction torque, oil film thickness and the like can be measured by using a hydraulic loading mode at the main shaft end. The device also only has a high-pressure oil area, which is different from the high-pressure and low-pressure environment in the pump; hydraulic loading is used on a rotating main shaft, so that more additional structures are caused, and the stability is reduced; the pressure sensors are only arranged at the outlet of the control valve and the inlet of the analog part, so that a relatively complete oil film pressure field cannot be obtained.
Disclosure of Invention
In order to better detect various parameters of a flow distribution pair, the embodiment of the invention provides an online testing device for the lubrication characteristic of the flow distribution pair of a hydraulic pump, which comprises:
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 loading disc is provided with two first through holes, adapters are arranged on the two first through holes, the adapters 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 port plate is provided with one first waist-shaped through hole, a high-pressure area of the port 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 pressure detection holes between the high-low pressure transition area and the second waist-shaped through hole, the pressure detection holes are through holes, one surface of the flow distribution plate, which is opposite to the friction disc, is provided with temperature detection holes, 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;
the rotating part is used for driving the main shaft to rotate;
a push portion for coupling with the moving member to adjust a gap between the port plate and the friction plate;
and the detection part comprises a pressure detection sensor arranged in the pressure detection hole, 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 rotating member further includes a rotating sleeve, an inner ring of the rotating sleeve is in transmission connection with the main shaft, the friction disc is disposed on the rotating sleeve, an outer ring of the rotating sleeve is connected with a supporting member, and the supporting member abuts against an inner wall of the housing.
Preferably, the shell inner wall is close to right-hand member lid one side and is provided with three-layer stair structure, the supporting component includes division board and backup pad, the division board with the backup pad sets up parallelly with the interval, rotatory axle sleeve passes division board and backup pad, rotatory axle sleeve with be provided with the sealing member between the division board, rotatory axle sleeve with be provided with thrust ball bearing between the backup pad, thrust ball bearing's outer lane with the backup pad joint, thrust ball bearing's inner circle and rotatory axle sleeve interference fit.
Preferably, the rotary shaft sleeve is in splined connection with the main shaft, and a disc spring for providing axial pretightening force is further arranged between the rotary shaft sleeve and the main shaft.
Preferably, the right end cover is provided with an outer protrusion and an inner protrusion at the center, a protrusion cavity is formed between the inner protrusion and the outer protrusion, the main shaft penetrates through the protrusion cavity, a double-row self-aligning bearing is arranged between the main shaft and the outer protrusion, and a tapered roller bearing is arranged between the main shaft and the inner protrusion.
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 screw rod is arranged on the base in parallel, the screw rod is connected with a loading frame in a threaded manner, one end of the six-component force sensor is connected with the loading frame, the other end of the six-component force sensor is connected with the loading disc, and the loading frame can push the loading disc to move.
Preferably, the pushing portion further comprises a locking member provided on the left end cap and limiting axial displacement of the loading plate.
The scheme of the invention has the following beneficial effects:
based on the thought design that will join in marriage a class pair and peel off for there is not unnecessary structure in the in-process that detects to disturb the testing process, whole device compact structure, multiple functional, the dismouting of being convenient for. The detection part is arranged on the valve plate, so that the oil film characteristic, the pressure field and the temperature field can be tested on line at the same time, and the real-time data acquisition, summarization and processing can be realized by combining with an industrial personal computer, so that the test result is clear; and the detection part is arranged on the non-rotating valve plate, so that the influence of rotation on the detection part is eliminated, and the detection result is more real and reliable.
Drawings
FIG. 1 is an overall schematic view of the present invention;
FIG. 2 is a simulated partial sectional view;
FIG. 3 is a schematic view of a face of the port plate facing the friction plate;
FIG. 4 is a schematic structural view of a loading tray;
fig. 5 is a plan view of the pushing portion.
[ 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, 132-distributing plate, 133-rotating shaft sleeve, 134-supporting component, 1341-isolating plate, 1342-supporting plate, 1343-thrust ball bearing, 1344-disc spring, 135-distributing positioning block, 141-friction plate, 142-spindle, 143-friction positioning block, 144-imitation blind hole, 1311-first through hole, 1312-adapter, 1314-oil pipe, 1315-first waist-shaped blind hole, 1321-first waist-shaped through hole, 1322-second waist-shaped through hole, 1323-pressure detecting hole, 1324-temperature detecting hole, 1325-displacement detecting platform, 121-outer protrusion, 122-inner bulge, 123-double-row self-aligning bearing and 124-tapered roller bearing;
2-a rotating part, 21-a main shaft driving motor and 22-a coupler;
3-pushing part, 31-base, 32-screw, 33-loading frame, 34-six-component force sensor and 35-locking piece.
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. 1-5, an embodiment of the present invention provides an online testing apparatus for lubrication characteristics of a hydraulic pump flow distribution pair, including a simulation portion 1, a detection portion, a rotation portion 2, and a pushing portion 3, where the simulation portion 1 is configured to simulate different environments in a pump body, the detection portion is configured to detect various parameters of the simulated environments in the pump body, the pushing portion 3 is configured to form the environments in the pump body under various conditions, and the rotation portion 2 simulates an operating state of the pump body.
Specifically, the simulation part 1 includes a housing 10, and a left end cover 11 and a right end cover 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 cover 11 and is located outside the housing 10, a port plate 132 is disposed on the loading plate 131, the port plate 132 is disposed inside the housing 10, the port plate 132 is detachably mounted on the loading plate 131 through a port positioning block 135, and multi-dimensional testing can be achieved by replacing different port plates 132 and port positioning blocks 135. The aforementioned rotating member 14 includes a friction disc 141 and a main shaft 142 in transmission connection with the friction disc 141, wherein the main shaft 142 penetrates 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 1314. The oil tube 1314 may pass through the left end cap 11 to facilitate communication with the swivel 1312. A first waist-shaped blind hole 1315 is further provided on the loading plate 131 on the side facing the port plate 132, and the first through hole 1311 is provided in the first waist-shaped blind hole 1315.
Generally, the port plate 132 is functionally divided into a high pressure region, a low pressure region, in this application, having one first kidney-shaped through hole 1321 disposed therein, and a high-low pressure transition region, having three second kidney-shaped through holes 1322 disposed therein. The passing area of the first waist-shaped through hole 1321 is larger than that of the second waist-shaped through hole 1322.
A pressure detection hole 1323 is arranged between the high-low pressure transition region and the second kidney-shaped through hole 1322, the pressure detection hole 1323 is a through hole, a temperature detection hole 1324 is arranged on the surface of the port plate 132 opposite to the friction plate 141, and the temperature detection hole 1324 is a blind hole. In order to ensure that the pressure detection holes 1323 and the temperature detection holes 1324 are convenient to assemble with various sensors, a threaded structure can be adopted for installation. It should be noted that the preferable inner wall of the pressure detection hole 1323 is provided with a fine thread, on one hand, the fine thread facilitates fixing the pressure detection sensor in the pressure detection hole 1323, and on the other hand, the fine thread also plays a certain sealing role, so that the influence of oil leakage of the through hole on an oil film is reduced.
Generally, the port plate 132 is structurally divided into a body, and an inner sealing strip and an outer sealing strip which are arranged on the body, wherein the inner side of the first waist-shaped through hole is the inner sealing strip, and the outer side of the first waist-shaped through hole is the outer sealing strip, in this application, the temperature detection holes 1324 are arranged at the inner and outer sealing strips, and the temperature detection holes 1324 at the inner sealing strip and the temperature detection holes 1324 at the outer sealing strip are both arranged in an annular shape, and the centers of circles coincide. Three displacement detection platforms 1325 are protruded from the outer edge of the port plate 132, and the included angle between any two adjacent displacement detection platforms 1325 is 120 degrees.
The aforementioned sensing part includes a pressure sensing sensor disposed in the pressure sensing hole 1323, a temperature sensing sensor disposed in the temperature sensing hole 1324, a displacement sensing sensor disposed on the displacement sensing stage 1325, and a six-component force sensor 34 connecting the loading plate 131 and the push part 3. The pressure detection sensor adopts a piezoelectric pressure sensor, and has small volume, good dynamic characteristic and high temperature resistance; 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 2 is used for driving the main shaft 142 to rotate, simulating the working state of the pump body, and the pushing part 3 is used for connecting with the loading disc 131 to adjust the size of the gap between the port plate 132 and the friction disc 141.
In the application, the flow distribution pair is separated based on the thought design, so that no redundant structure interferes the detection process in the detection process, and the whole device has the advantages of compact structure, complete functions and convenience in disassembly and assembly. The detection part is arranged on the valve plate 132, so that the oil film characteristic, the pressure field and the temperature field can be tested on line at the same time, and the real-time data acquisition, summarization and processing can be realized by combining with an industrial personal computer, so that the test result is clear; and the detection part is arranged on the non-rotating valve plate 132, the influence of the rotation on the detection part is eliminated, and the detection result is more real and reliable.
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 simulate the working environment of the distribution pair in the pump, a dummy blind hole 144 is further provided on the surface of the friction disc 141 facing the distribution disc 132, and the dummy blind hole 144 is made according to the structure of different pumps and is made to simulate the bottom structure of the cylinder block.
The pushing portion 3 not only has a function of adjusting the gap between the port plate 132 and the friction plate 141, but also has another 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. Therefore, in the present embodiment, a push portion 3 having a good effect is also provided. The pushing part 3 includes a base 31, a screw 32 is provided on the base 31, preferably, the screw 32 is parallel to the base 31, a loading frame 33 is screwed on the screw 32, and when the screw 32 rotates, the loading frame 33 advances and retreats along the screw 32.
Specifically, two parallel guide rails are arranged on the base 31, the length direction of the guide rails is parallel to the length direction of the screw 32, two sliders are arranged on each guide rail, and the loading frame 33 is arranged on the four sliders. The bottom of the loading frame 33 is also provided with a screw rod threaded block which is in threaded connection with the screw rod 32. In order to ensure that the loading frame 33 moves horizontally, the base 31 is further provided with a screw rod supporting seat which is arranged at two ends of the screw rod 32, on one hand, the screw rod 32 is supported, so that the screw rod 32 is prevented from colliding with the base 31 in the rotating process, and on the other hand, the loading frame 33 can also move horizontally by adjusting the height of the screw rod supporting seat. The aforementioned six-component force sensor 34 is provided on the loading frame 33, and the other end of the six-component force sensor 34 is connected to the loading tray 131. The screw 32 is driven by a pushing motor, and the pushing motor and the screw 32 are preferably in meshing transmission.
The pushing part 3 is loaded in a ball screw mode and is arranged on one side of the non-rotating valve plate 132, so that the loading is more stable, and the positioning is more accurate. In addition, the ball screw is adopted to convert the rotary motion into the linear motion, so that larger torque can be transmitted and the transmission is stable.
The six-component force sensor 34 can simultaneously detect the pressure in the three coordinate axis directions of the spatial rectangular coordinate system and the torque around the three coordinate axes, that is, 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.
Further, in order to reduce the reaction force applied to the pushing portion 3, the pushing portion 3 further includes a locking member which is provided on the left end cap 11 and can restrict the axial displacement of the loading disc 131. In this embodiment, the locking member locks the loading plate 131 by using the wedge locking principle.
The rotating member 14 further includes a rotating sleeve 133, an inner ring of the rotating sleeve 133 is drivingly connected to a main shaft 142, a friction disc 141 is disposed on the rotating sleeve 133 through a friction positioning block 143, an outer ring of the rotating sleeve 133 is provided with a support member 134, and the support member 134 abuts against an inner wall of the housing 10.
The aforementioned support member 134 includes a partition plate 1341 and a support plate 1342, wherein the partition plate 1341 and the support plate 1342 are disposed in parallel at an interval, the rotation sleeve 133 passes through the partition plate 1341 and the support plate 1342, a sealing member is disposed between the rotation sleeve 133 and the partition plate 1341, and a thrust ball bearing 1343 is disposed between the rotation sleeve 133 and the support plate 1342. An outer ring of the thrust ball bearing 1343 is engaged with the support plate 1342, and prevents the rotation sleeve 133 from moving in a direction away from the port plate 132 due to an axial separating force. Preferably, the inner race of the thrust ball bearing 1343 is interference fitted with the rotary sleeve 133.
Further, the inner wall of the housing 10 is provided with three layers of stepped structures on one side close to the right end cover, and the isolation plate 1341 and the support plate 1342 are respectively abutted to the three layers of stepped structures. The isolating plate 1341 is used for isolating oil, and the isolating plate 1341 is sealed with the rotating sleeve 133 and the housing 10. The support plate 1342 abuts the three-tiered step structure to eliminate axial separation forces.
The main shaft 142 is connected with the rotary shaft sleeve 133 by a spline, and a disc spring 1344 for providing axial pretightening force is further arranged between the rotary shaft sleeve 133 and the main shaft 142 to ensure the pretightening force of the rotary shaft sleeve 133 and the main shaft 142 in the axial direction.
The right end cover 12 is further provided with an inner protrusion 122 and an outer protrusion 121 at the center, a protrusion cavity is formed between the inner protrusion 122 and the outer protrusion 121, the main shaft 142 passes through the protrusion cavity, a double-row self-aligning bearing 123 is arranged between the main shaft 142 and the outer protrusion 121, and a tapered roller bearing 124 is arranged between the main shaft 142 and the inner protrusion 122. The double-row self-aligning bearing 123 has automatic alignment, can compensate errors caused by non-concentricity and shaft deflection, and can bear certain axial force. The tapered roller bearing 124 can bear a slightly larger axial force than the double row self-aligning bearing 123.
The rotating part 2 in this embodiment uses a spindle 142 motor, and the spindle 142 motor is in transmission connection with the spindle 142 through a coupling 22.
In the technical scheme, a motor of a main shaft 142 drives the main shaft 142 to rotate, torque is transmitted to a rotating shaft sleeve 133, a friction disc 141 arranged on the rotating shaft sleeve 133 also rotates along with the rotating shaft sleeve, a flow distribution pair in rotary friction motion is formed by the friction distribution pair and a flow distribution disc 132, high-pressure oil and low-pressure oil enter between the flow distribution disc 132 and the friction disc 141 through oil pipes, an oil film is formed under the action of the rotary motion and the hydrostatic pressure of the oil, axial separating force is generated to two sides, high-pressure and low-pressure oil film support of the flow distribution pair is simulated, and the flow distribution disc 132 and the friction disc 141 are supported to play a lubricating role. The pushing part 3 applies axial loading force to the loading disc 131, is balanced with axial separating force generated by the oil film, simulates the stress condition of the thrust plate 132, and enables the thickness of the oil film to be within a certain range.
An oil overflow hole is also arranged in the working space of the distributing plate 132 and the friction disc 141, and the oil overflow hole is externally connected with a flowmeter and can measure the leakage flow between the distributing pairs.
While the foregoing is directed to the preferred embodiment of the present invention, it will be appreciated by those skilled in the art that various changes and modifications may be made therein without departing from the principles of the invention as set forth in the appended claims.
Claims (7)
1. The utility model provides a vice lubricating property on-line measuring device that flows is joined in marriage to hydraulic pump which characterized in that includes:
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 (142) in transmission connection with the friction disc (141), the main shaft (142) 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 loading disc (131) is provided with two first through holes (1311), adapter joints (1312) are arranged on the two first through holes (1311), the adapter joints (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 (1315), the first through holes (1311) are correspondingly arranged in the first waist-shaped blind holes (1315), a first waist-shaped through hole (1321) is arranged in a low-pressure area of the port plate (132), three second waist-shaped through holes (1322) are arranged in a high-pressure area of the port plate (132), and the passing area of the first waist-shaped through hole (1321) is larger than that of the second waist-shaped through holes (1322); a pressure detection hole (1323) is formed in the valve plate (132) between the high-low pressure transition region and the second kidney-shaped through hole (1322), the pressure detection hole (1323) is a through hole, a temperature detection hole (1324) is formed in one surface, back to the friction disc (141), of the valve plate (132), the temperature detection hole (1324) is a blind hole, and the temperature detection holes (1324) are annularly arranged at the inner sealing belt and the outer sealing belt of the valve plate (132); three displacement detection platforms (1325) are uniformly distributed on the valve plate (132) in the circumferential direction;
the rotating part (2) is used for driving the main shaft (142) to rotate;
a push portion (3) for connecting with the moving member (13) to adjust a gap between the port plate (132) and the friction plate (141);
a sensing part including a pressure sensing sensor disposed in the pressure sensing hole 1323, a temperature sensing sensor disposed in the temperature sensing hole 1324, a displacement sensing sensor disposed on the displacement sensing stage 1325, and a six-component force sensor 34 connecting the loading plate 131 and the pushing part 3;
the rotating member (14) further comprises a rotating shaft sleeve (133), an inner ring of the rotating shaft sleeve (133) is in transmission connection with a main shaft (142), the friction disc (141) is arranged on the rotating shaft sleeve (133), an outer ring of the rotating shaft sleeve (133) is connected with a supporting member (134), and the supporting member (134) is abutted to the inner wall of the shell (10);
the inner wall of the shell (10) is provided with three layers of stepped structures on one side close to the right end cover (12), the supporting component (134) comprises an isolation plate (1341) and a supporting plate (1342), the isolation plate (1341) and the supporting plate (1342) are arranged in parallel at intervals, the rotating shaft sleeve (133) penetrates through the isolation plate (1341) and the supporting plate (1342), a sealing element is arranged between the rotating shaft sleeve (133) and the isolation plate (1341), a thrust ball bearing (1343) is arranged between the rotating shaft sleeve (133) and the supporting plate (1342), the outer ring of the thrust ball bearing (1343) is clamped with the supporting plate (1342), and the inner ring of the thrust ball bearing (1343) is in interference fit with the rotating shaft sleeve (133).
2. The on-line testing device for the lubrication characteristic of the hydraulic pump flow distribution pair is characterized in that the rotating shaft sleeve (133) is in splined connection with the main shaft (142), and a belleville spring (1344) providing axial pre-tightening force is further arranged between the rotating shaft sleeve (133) and the main shaft (142).
3. The on-line testing device for the lubrication characteristic of the hydraulic pump distribution pair is characterized in that an outer protrusion (121) and an inner protrusion (122) are arranged at the center of the right end cover (12), a protrusion cavity is formed between the inner protrusion (122) and the outer protrusion (121), the main shaft (142) penetrates through the protrusion cavity, a double-row self-aligning bearing (123) is arranged between the main shaft (142) and the outer protrusion (121), and a tapered roller bearing (124) is arranged between the main shaft (142) and the inner protrusion (122).
4. The on-line testing device for the lubrication characteristic of the distribution pair of the hydraulic pump as claimed in claim 1, wherein the friction disc (141) is provided with a plurality of dummy blind holes (144) on the surface facing the distribution disc (132).
5. The on-line testing device for the lubrication characteristic of the distribution pair of the hydraulic pump as recited in claim 1, characterized in that the rotating part (2) is a spindle driving motor (21), and the spindle driving motor (21) is connected with the spindle (142) through a coupling (22).
6. The on-line testing device for the lubrication characteristic of the distribution pair of the hydraulic pump as recited in claim 1, wherein the pushing part (3) comprises a base (31), a screw (32) is disposed in parallel on the base (31), a loading frame (33) is screwed on the screw (32), one end of a six-component force sensor (34) is connected with the loading frame (33), the other end of the six-component force sensor is connected with the loading disc (131), and the loading frame (33) can push the loading disc (131) to move.
7. The hydraulic pump flow distribution pair lubrication characteristic in-line testing device as claimed in claim 6, wherein said push portion (3) further comprises a locking member provided on said left end cap (11) and limiting axial displacement of said loading disc (131).
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| CN202111470043.2A CN114152734B (en) | 2021-12-03 | 2021-12-03 | On-line testing device for lubricating characteristic of flow distribution pair of hydraulic pump |
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| CN202111470043.2A CN114152734B (en) | 2021-12-03 | 2021-12-03 | On-line testing device for lubricating characteristic of flow distribution pair of hydraulic pump |
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| CN114152734B true CN114152734B (en) | 2022-09-02 |
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| CN115076089B (en) * | 2022-07-06 | 2023-06-09 | 中南大学 | Hydraulic pump flow distribution pair oil film characteristic online testing device based on end cover transformation |
| 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 |
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| JP2599967Y2 (en) * | 1993-10-01 | 1999-09-27 | 東芝機械株式会社 | Double piston pump |
| US6546785B1 (en) * | 1998-04-02 | 2003-04-15 | Rockwell Automation Technologies, Inc. | System and method for dynamic lubrication adjustment for a lubrication analysis system |
| CN106595462B (en) * | 2016-12-29 | 2018-11-16 | 北京理工大学 | A kind of pair in axial piston pump test oil film thickness measurement system |
| CN107762757A (en) * | 2017-11-14 | 2018-03-06 | 太原理工大学 | Asymmetric distributing construction pocketed oil noise shaft orientation plunger variable pump in parallel can drop in one kind |
| CN110761986B (en) * | 2019-11-28 | 2021-06-29 | 太重集团榆次液压工业有限公司 | Detection apparatus for valve plate eyebrow hair groove of plunger pump |
| CN111472955B (en) * | 2020-03-26 | 2021-02-23 | 浙江大学 | External swash plate plunger pump pre-pressing force and variable adjusting device |
| 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 |
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2021
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