CN109026650B - Axial plunger pump swash plate-sliding shoe friction pair abrasion testing device and testing method thereof - Google Patents
Axial plunger pump swash plate-sliding shoe friction pair abrasion testing device and testing method thereof Download PDFInfo
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- CN109026650B CN109026650B CN201811004476.7A CN201811004476A CN109026650B CN 109026650 B CN109026650 B CN 109026650B CN 201811004476 A CN201811004476 A CN 201811004476A CN 109026650 B CN109026650 B CN 109026650B
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- 238000012360 testing method Methods 0.000 title claims abstract description 178
- 238000005299 abrasion Methods 0.000 title claims abstract description 131
- 239000003921 oil Substances 0.000 claims description 80
- 230000007246 mechanism Effects 0.000 claims description 72
- 239000010687 lubricating oil Substances 0.000 claims description 51
- 230000001105 regulatory effect Effects 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 16
- 230000001050 lubricating effect Effects 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 4
- 238000005461 lubrication Methods 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims 1
- 238000011156 evaluation Methods 0.000 abstract description 2
- 238000011835 investigation Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000002474 experimental method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention discloses a wear testing device and a wear testing method for a swash plate-sliding shoe friction pair of an axial plunger pump, wherein the wear testing device for the swash plate-sliding shoe friction pair of the axial plunger pump comprises the following components: the invention solves the problems of long and complex comprehensive investigation period of the whole axial plunger pump bench test and the actual engine, can realize the completion of the abrasion characteristic evaluation of the swash plate-slipper friction pair in a short test period, and provides reliable basis for actual production.
Description
Technical Field
The invention relates to a wear testing device, in particular to a wear testing device for a swash plate-sliding shoe friction pair of an axial plunger pump and a testing method thereof.
Background
Compared with the traditional machine, the hydraulic machine has a series of advantages, is widely applied to engineering machinery equipment, and the axial plunger pump is one of the elements with the most complex structure in the hydraulic field and higher requirements on technology and materials. In particular, the friction pair has more severe requirements on the performance of process materials and the like, and the swash plate-slipper friction pair is used as one of the most important friction pairs, so that the swash plate-slipper friction pair has complex motion state and dynamic characteristics, the working environment is quite severe, and the performance of the swash plate-slipper friction pair directly influences the working performance of the axial plunger pump. With the continuous development of the hydraulic pump to high speed, high pressure and high power, the friction speed and the bearing pressure of the swash plate-slipper friction pair are further increased, so that the abrasion failure of the swash plate-slipper friction pair is accelerated, and therefore, the performance test of the swash plate-slipper pair under different working conditions is very necessary.
However, the experimental effect of the abrasion test of the swash plate-slipper friction pair carried out at home and abroad is not ideal, and the working load of the swash plate and slipper, the rotating diameter of the plunger slipper, the angle of the swash plate, the relative rotating speed of the slipper, the quality and the pressure of lubricating oil cannot be tested, so that the working condition of the swash plate-slipper friction pair under various working conditions cannot be studied. The abrasion test of the swash plate-slipper friction pair usually carries out the whole machine endurance test, and the abrasion test is long in period, low in efficiency and high in manpower and material resources.
Disclosure of Invention
Aiming at the technical problems existing in the prior art, the invention aims at: the device and the method for testing the abrasion of the swash plate-sliding shoe friction pair of the axial plunger pump are provided.
The aim of the invention is achieved by the following technical scheme: an axial plunger pump swash plate-slipper friction pair wear testing device, comprising: the device comprises a loading mechanism, a driving mechanism, a swash plate angle adjusting device and a slipper positioning and clamping mechanism, wherein the loading mechanism is connected with the slipper positioning and clamping mechanism, the swash plate angle adjusting device is installed on the driving mechanism, the slipper positioning and clamping mechanism comprises a bevel gear pair, a positioning block, a fixed shell, a clamping block and a plunger mechanism, the bevel gear pair is provided with a large bevel gear and a small bevel gear which are meshed with each other, an Archimedes spiral groove is formed on one side surface of the large bevel gear, an Archimedes spiral lug connected to the Archimedes spiral groove is formed on the positioning block, an adjusting channel is formed on the fixed shell, the adjusting channel is used for loading the clamping block, the clamping block can move along the adjusting channel to adjust the fixed position of the clamping block, a clamping section for clamping the plunger mechanism is formed between the positioning block and the clamping block, the plunger mechanism comprises a cylinder body, a plunger and a spring, the cylinder body is clamped in the clamping section, the plunger and the spring is arranged in the cylinder body, the spring is arranged at the bottom of the cylinder body to push the plunger, and the slipper is installed on the end of the plunger to extend out of the cylinder and contacts with a testing surface;
the swash plate angle adjusting device comprises two swash plate support plates, two driving plates and two supporting screws, wherein the two swash plate support plates are oppositely arranged on two sides of the swash plate, round grooves are formed in opposite sides of the two swash plate support plates, two sides of the swash plate are provided with swash plate support cambered surfaces which are matched with the round grooves in the two swash plate support plates respectively and can slide relative to the round grooves, the two swash plate support plates are fixedly connected to the driving plates, the driving plates are correspondingly provided with adjusting screw holes on two radial sides of the swash plate, and the two supporting screws respectively penetrate through the two adjusting screw holes to be in contact with the swash plate so as to fix the inclined angle of the swash plate.
Preferably, the lubricating device for applying lubricating oil to the friction surface of the sliding shoe further comprises an oil pump, the cylinder body is provided with an oil hole, the sliding shoe is provided with a through hole communicated with the friction surface of the sliding shoe, the plunger is provided with an oil feeding channel, an outlet of the oil feeding channel is communicated with the through hole, an oil inlet of the oil feeding channel is communicated with the oil hole, and the oil pump is communicated with the oil hole.
Preferably, the lubrication device further includes a throttle valve for adjusting the oil pressure of the lubricating oil and a pressure gauge for detecting the oil pressure of the lubricating oil, and the oil pump communicates with the oil hole through the throttle valve.
Preferably, the number of the positioning blocks and the number of the clamping blocks are two, the two plunger mechanisms are arranged in a one-to-one correspondence manner, and the two plunger mechanisms are respectively clamped in a clamping interval formed by the two positioning blocks and the clamping blocks;
the cylinder body is provided with an annular connecting groove, and the positioning block and the clamping block are provided with convex parts which can be matched with the annular connecting groove.
Preferably, two guide grooves are radially formed in the fixed shell, two positioning blocks extend out of the guide grooves, a bearing mounting shaft extends out of the middle of the fixed shell, the gear bearing is further arranged on the bearing mounting shaft, and the large bevel gear is arranged on the gear bearing.
Preferably, the clamping block comprises an adjusting bolt and an L-shaped clamping block, and the adjusting bolt passes through the clamping block and is connected into the adjusting channel.
Preferably, the loading mechanism comprises a loading oil pump, a three-position four-way valve, a double-hydraulic-control one-way valve, a loading regulating valve, an unloading regulating valve and a hydraulic cylinder, wherein the three-position four-way valve is used for controlling the loading oil pump to pump oil to the loading regulating valve or the unloading regulating valve, the three-position four-way valve is respectively connected with the loading regulating valve and the unloading regulating valve through the double-hydraulic-control one-way valve, the loading regulating valve or the unloading regulating valve is respectively communicated with two oil cavities of the hydraulic cylinder, and a piston rod of the hydraulic cylinder is connected with the sliding shoe positioning and clamping mechanism; and a pressure sensor for detecting the magnitude of the loading force applied by the hydraulic cylinder.
Preferably, the swash plate angle adjusting device further comprises a pre-positioning bolt, the swash plate support plate is provided with a positioning arc groove, and the pre-positioning bolt penetrates through the positioning arc groove to be connected to the swash plate;
the connecting position of the sliding shoe and the plunger is provided with a spherical groove, the end part of the plunger matched with the sliding shoe is a spherical end head, and the spherical end head is matched into the spherical groove.
Preferably, the driving mechanism comprises a motor, a main shaft, a shell, a speed measuring gear and a speed measuring sensor, wherein the main shaft is arranged on the shell, the motor is connected with the main shaft, the speed measuring gear is fixedly sleeved on the main shaft, the speed measuring sensor is arranged corresponding to the speed measuring gear, and the speed measuring sensor is used for detecting the rotating speed of the speed measuring gear.
The method for testing the abrasion of the axial plunger pump swash plate-slipper friction pair by using the axial plunger pump swash plate-slipper friction pair abrasion testing device is characterized by comprising the following steps of: the method comprises the steps of testing at least one or more than two of different inclined angles of the swash plate, different rotating speeds, different loading forces, different rotating diameters of the sliding shoes, different lubricating oil qualities and different lubricating oil pressures to influence abrasion of a friction pair of the swash plate and the sliding shoes;
testing the influence of different inclined angles of the inclined plate on abrasion of the inclined plate-slipper friction pair;
pushing the swash plate to rotate in the circular groove of the swash plate support plate, screwing the two support screws when the swash plate reaches a set inclination angle, enabling the two support screws to abut against the swash plate so as to keep the swash plate fixed under the set inclination angle, starting the axial plunger pump swash plate-slipper friction pair abrasion testing device to test, and stopping the axial plunger pump swash plate-slipper friction pair abrasion testing device when the set stopping condition is reached;
after the sliding shoes and the swash plate are replaced and the swash plate is adjusted to another set inclination angle, the two supporting screws are twisted, so that the swash plate is fixedly connected, an axial plunger pump swash plate-sliding shoe friction pair abrasion testing device is started for testing, and when a set stopping condition is reached, the axial plunger pump swash plate-sliding shoe friction pair abrasion testing device is stopped;
comparing the skid shoes and/or the swash plate tested for each time to obtain the influence of the inclination angle of the swash plate on the abrasion of the friction pair of the swash plate and the skid shoes;
testing the influence of different rotation speeds on the abrasion of a swash plate-slipper friction pair;
starting a driving mechanism to enable the swash plate to perform friction test with the sliding shoes at a set rotating speed, and stopping the axial plunger pump swash plate-sliding shoe friction pair abrasion testing device when a set stopping condition is reached;
the sliding shoes and the swash plate are replaced, the driving mechanism is adjusted to enable the swash plate to carry out friction test with the sliding shoes at another set rotating speed, and when the set stopping condition is reached, the axial plunger pump swash plate-sliding shoe friction pair abrasion testing device is stopped;
comparing the skid shoes and/or the swash plate tested for each time to obtain the influence of the rotation speed of the swash plate on the abrasion of the friction pair of the swash plate and the skid shoes;
testing the influence of different loading forces on the abrasion of a swash plate-slipper friction pair;
the hydraulic cylinder of the loading mechanism pushes the sliding shoe positioning and clamping mechanism so as to increase the pressure between the sliding shoes and the sloping cam plate, when the pressure is applied to a set pressure value, the sloping cam plate-sliding shoe friction pair abrasion testing device of the axial plunger pump is started to test, and when the set stopping condition is reached, the sloping cam plate-sliding shoe friction pair abrasion testing device of the axial plunger pump is stopped;
after the sliding shoes and the sloping cam plate are replaced, the hydraulic cylinders of the loading mechanism are adjusted to push the sliding shoes to position and clamp the thrust of the mechanism, so that when the pressure between the sliding shoes and the sloping cam plate reaches another set pressure value, the sloping cam plate-sliding shoe friction pair abrasion testing device of the axial plunger pump is started to test, and when the set stopping condition is reached, the sloping cam plate-sliding shoe friction pair abrasion testing device of the axial plunger pump is stopped;
comparing the skid shoes and/or the swash plate tested for each time to obtain the influence of loading force on the abrasion of the friction pair of the swash plate and the skid shoes;
testing the influence of different slipper rotation diameters on the abrasion of a swash plate-slipper friction pair;
the small bevel gear is rotated to drive the large bevel gear, the large bevel gear drives the two positioning blocks to relatively move or oppositely move so as to change the rotating diameter of the two sliding shoes on the swash plate to a set position, the axial plunger pump swash plate-sliding shoe friction pair abrasion testing device is started to test, and when a set stopping condition is reached, the axial plunger pump swash plate-sliding shoe friction pair abrasion testing device is stopped;
the small bevel gears are rotated after the swash plate and the two sliding shoes are replaced, the two positioning blocks relatively move or oppositely move so as to adjust the rotation diameter of the two sliding shoes on the swash plate to another set position, an axial plunger pump swash plate-sliding shoe friction pair abrasion testing device is started for testing, and when a set stopping condition is reached, the axial plunger pump swash plate-sliding shoe friction pair abrasion testing device is stopped;
comparing the skid shoes and/or the swash plate tested for each time to obtain the influence of the rotation diameter of the skid shoes on the abrasion of the friction pair of the swash plate and the skid shoes;
testing the influence of different lubricating oil products on the abrasion of a swash plate-slipper friction pair;
applying lubricating oil on a friction surface between a swash plate and a slipper, starting an axial plunger pump swash plate-slipper friction pair abrasion testing device to test, and stopping the axial plunger pump swash plate-slipper friction pair abrasion testing device when a set stopping condition is reached;
the method comprises the steps of replacing skid shoes, a sloping cam plate and another quality of lubricating oil, applying the another quality of lubricating oil on a friction surface between the sloping cam plate and the skid shoes, starting an axial plunger pump sloping cam plate-skid shoe friction pair abrasion testing device to test, and stopping the axial plunger pump sloping cam plate-skid shoe friction pair abrasion testing device when a set stopping condition is reached;
comparing the skid shoes and/or the sloping cam plate tested for each time so as to obtain the influence of lubricating oil on the wearing of the sloping cam plate-skid shoe friction pair;
testing the influence of different lubricating oil pressures on the abrasion of a swash plate-slipper friction pair;
providing lubricating oil with set pressure on a friction surface between a swash plate and a slipper, starting an axial plunger pump swash plate-slipper friction pair abrasion testing device to test, and stopping the axial plunger pump swash plate-slipper friction pair abrasion testing device when a set stop condition is reached;
the method comprises the steps of replacing a slipper and a slipper, providing lubricating oil with another set pressure on a friction surface between the slipper and the slipper, starting an axial plunger pump slipper friction pair abrasion testing device to test, and stopping the axial plunger pump slipper friction pair abrasion testing device when a set stop condition is reached;
the shoes and/or swashplate of each test are compared to derive the effect of different lubricating oil pressures on the wear of the swashplate-shoe friction pair.
Compared with the prior art, the invention has the following advantages and effects:
1. the invention solves the problems of long and complex comprehensive investigation period of the whole bench test of the axial plunger pump and the actual engine, can realize the completion of the abrasion characteristic evaluation of the swashplate-slipper friction pair in a short test period, and provides a reliable basis for actual production.
2. According to the sliding shoe positioning and clamping mechanism, the hand wheel can be screwed by hand, the position of the positioning block can be adjusted within a certain range, so that the relative distance between the two sliding shoes is changed, namely, the distribution condition of the sliding shoes under actual working conditions is changed, the abrasion test of a swash plate-sliding shoe friction pair under different sliding shoe rotation diameters is realized, and a reference is provided for the actual working conditions.
3. The abrasion condition of the swash plate-slipper friction pair under various different working conditions is tested by changing the friction influence factors influencing the test results, such as the inclination angle of the swash plate, the rotation speed of the swash plate-slipper friction pair, the rotation number of the swash plate-slipper friction pair, the loading force, the rotation diameter of the slipper, the quality of lubricating oil, the pressure of the lubricating oil and the like.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic illustration of the present invention with the drive mechanism removed;
FIG. 3 is a schematic view of the shoe positioning and clamping mechanism of the present invention;
FIG. 4 is a schematic structural view of the stationary housing of the present invention;
FIG. 5 is a schematic illustration of the connection of the swash plate of the present invention to the swash plate support plate;
fig. 6 is a perspective view of fig. 5;
FIG. 7 is a schematic view of the structure of the swash plate of the present invention;
fig. 8 is a schematic view of the loading mechanism of the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but embodiments of the present invention are not limited thereto.
An axial plunger pump swash plate-slipper friction pair wear testing device, comprising: the device comprises a loading mechanism, a driving mechanism, a swash plate angle adjusting device and a sliding shoe positioning and clamping mechanism, wherein the loading mechanism is connected with the sliding shoe positioning and clamping mechanism;
the sliding shoe positioning and clamping mechanism comprises a bevel gear pair, a positioning block 1, a fixed shell 2, a clamping block 3, a hand wheel and a plunger mechanism, wherein the bevel gear pair is provided with a large bevel gear 4 and a small bevel gear 5 which are meshed with each other, the hand wheel is connected with the small bevel gear 5, an Archimedes spiral groove is formed in one side surface of the large bevel gear 4, the positioning block 1 is provided with an Archimedes spiral lug 6 connected to the Archimedes spiral groove, the fixed shell 2 is provided with an adjusting channel 44, the adjusting channel 44 is used for loading the clamping block 3, the clamping block 3 can move along the adjusting channel 44 to adjust the fixed position of the clamping block 3, the positioning block 1 is arranged opposite to the clamping block 3, a clamping section for clamping the plunger mechanism is formed between the positioning block 1 and the clamping block 3, the plunger mechanism comprises a cylinder 8, a plunger and a spring 10, the cylinder 8 is clamped in the clamping section, the plunger 9 and the spring 10 are arranged in the cylinder 8, the spring 10 is positioned at the bottom of the cylinder 8 to push the plunger, and the sliding shoe 11 is arranged on the end of the plunger and contacts with a friction surface 12 of a sloping plate; preferably, the clamping block 3 comprises an adjusting bolt 26 and an L-shaped clamping block, and the adjusting bolt 26 passes through the clamping block and is connected into the adjusting channel 44.
By rotating the hand wheel, the small bevel gear 5 can be driven to rotate so as to drive the large bevel gear 4 to rotate, and because the Archimedes spiral groove has the characteristic of Archimedes spiral, the two positioning blocks 1 can be driven to move up and down simultaneously so as to position the cylinder 8, the clamping block 3 can move along the adjusting channel 44, the adjusting channel 44 can be an elliptic long groove, after moving to a required position, the adjusting bolt 26 passes through the clamping block and then is connected into the adjusting channel 44 so as to fix the clamping block, and at the moment, the cylinder 8 is clamped between the positioning blocks 1 and the clamping block;
the spring 10 is placed in the cylinder 8, one end of the spring is contacted with the bottom surface of the cylinder 8, the other end of the spring is contacted with the plunger, and the sliding shoe can be always kept in contact with the sloping cam plate by utilizing the spring 10, so that the test is ensured.
The cylinder 8 is provided with an annular connecting groove, the positioning block 1 and the clamping block 3 are provided with a protruding part 40 which can be matched with the annular connecting groove, and when the cylinder 8 is clamped in a clamping interval, the protruding part 40 of the positioning block 1 and the clamping block 3 is matched with the annular connecting groove, so that the cylinder 8 is prevented from moving axially. To enable a more secure locking of the cylinder 8, the projections 40 may be provided as annular projections.
The swash plate angle adjusting device comprises two swash plate support plates 13, two driving plates 14 and two supporting screws 15, wherein the two swash plate support plates 13 and the two supporting screws 15 are oppositely arranged on two sides of a swash plate, round grooves 16 are formed in opposite sides of the two swash plate support plates 13, swash plate support cambered surfaces 17 which are matched with the round grooves 16 in the two swash plate support plates 13 respectively and can slide relative to the round grooves 16 are arranged on two sides of the swash plate, the two swash plate support plates 13 are fixedly connected to the driving plates 14, adjusting screw holes are formed in the two radial sides of the driving plates 14 corresponding to the swash plate, and the two supporting screws 15 respectively penetrate through the two adjusting screw holes to be in contact with the swash plate so as to fix the inclined angle of the swash plate.
The swash plate angle adjusting device further includes a pre-positioning bolt 42, and the swash plate support plate has a positioning arc groove 43, and the pre-positioning bolt 42 is connected to the swash plate through the positioning arc groove 43.
The tail ends of the two supporting screws 15 prop against the swash plate to fix the inclination angle of the swash plate without change, the change of the angle of the swash plate can be limited by the adjustment of the two supporting screws 15, the two swash plate supporting plates are mainly used for supporting the swash plate, the swash plate supporting cambered surface 17 of the swash plate can slide along the circular groove 16, when the swash plate supporting cambered surface 17 slides, the inclination angle of the swash plate changes, and when the swash plate reaches the set inclination angle, the pre-positioning bolt 42 passes through the positioning cambered groove 43 to be connected to the swash plate so as to pre-lock the swash plate.
Preferably, the lubricating device for applying lubricating oil to the sliding shoe friction surface 12 is further comprised, the lubricating device comprises an oil pump 18, the cylinder 8 is provided with an oil hole 19, the sliding shoe is provided with a through hole 20 communicated with the sliding shoe friction surface 12, the plunger is provided with an oil feeding channel 21, the outlet of the oil feeding channel 21 is communicated with the through hole 20, the oil inlet of the oil feeding channel 21 is communicated with the oil hole 19, and the oil pump 18 is communicated with the oil hole 19.
Preferably, the lubrication device further includes a throttle valve 22 for regulating the oil pressure of the lubricating oil and a pressure gauge 23 for detecting the oil pressure of the lubricating oil, and the oil pump 18 communicates with the oil hole 19 through the throttle valve 22.
The oil pump 18 pumps oil into the oil hole 19, oil enters the oil hole 19 and then enters the through hole 20 through the oil feeding channel 21 so as to lubricate the shoe friction surface 12, so that the swash plate-shoe friction pair is lubricated, the throttle valve 22 is used for adjusting the pressure of the oil, and the change of the abrasion condition of the swash plate-shoe friction pair under different oil pressures can be explored.
The connecting position of the sliding shoe and the plunger is provided with a spherical groove, the end part of the plunger matched with the sliding shoe is a spherical end 41, and the spherical end 41 is matched into the spherical groove. The shoe can be rotated around the spherical end 41 of the plunger over any angular range by the spherical end 41 engaging the spherical groove.
Preferably, the number of the positioning blocks 1 and the number of the clamping blocks 3 are two, the two plunger mechanisms are arranged in a one-to-one correspondence mode, and the two plunger mechanisms are respectively clamped in clamping intervals formed by the two positioning blocks 1 and the clamping blocks 3.
Preferably, two guide grooves 24 are radially formed in the fixed casing 2, two positioning blocks 1 extend out of the guide grooves 24, a bearing mounting shaft 25 extends out of the middle of the fixed casing 2, and the fixed casing further comprises a gear bearing, the gear bearing is mounted on the bearing mounting shaft 25, and the large bevel gear 4 is mounted on the gear bearing.
Preferably, the loading mechanism comprises a loading oil pump 27, a three-position four-way valve 28, a double-hydraulic-control check valve, a loading regulating valve 30, an unloading regulating valve 31 and a hydraulic cylinder 32, wherein the three-position four-way valve 28 is used for controlling the loading oil pump 27 to pump oil to the loading regulating valve 30 or the unloading regulating valve 31, the three-position four-way valve 28 is respectively connected with the loading regulating valve 30 and the unloading regulating valve 31 through the double-hydraulic-control check valve, the loading regulating valve 30 or the unloading regulating valve 31 is respectively communicated with two oil cavities of the hydraulic cylinder 32, and a piston rod of the hydraulic cylinder 32 is connected with the sliding shoe positioning and clamping mechanism.
The loading oil pump 27 outputs high-pressure oil, the three-position four-way valve 28 is set to be in left position for working, the high-pressure oil enters the left oil cavity of the hydraulic cylinder 32 from the left path after passing through the double-hydraulic control one-way valve 29 and the loading regulating valve 30, so that a piston rod of the hydraulic cylinder 32 is pushed out to load a swash plate-slipper friction pair, when the loading pressure reaches the required pressure, the three-position four-way valve 28 is set to be in middle position for working, the testing can be carried out, the three-position four-way valve 28 is set to be in right position for working when the loading pressure is unloaded, the high-pressure oil flows out from the loading oil pump 27 and enters the right oil cavity of the hydraulic cylinder 32 after passing through the three-position four-way valve 28 and the double-hydraulic control one-way valve 29, and the piston rod of the hydraulic cylinder 32 moves leftwards for retraction to achieve the purpose of unloading force. An overflow valve can also be arranged in the loading mechanism as a safety valve.
Preferably, a pressure sensor 33 is also included for detecting the amount of loading force applied by the hydraulic cylinder 32.
Preferably, the driving mechanism comprises a motor 34, a main shaft 35, a housing 36, a speed measuring gear 37 and a speed measuring sensor 38, wherein the main shaft 35 is arranged on the housing 36, the motor 34 is connected with the main shaft 35, the speed measuring gear 37 is fixedly sleeved on the main shaft 35, the speed measuring sensor 38 is arranged corresponding to the speed measuring gear 37, and the speed measuring sensor 38 is used for detecting the rotating speed of the speed measuring gear 37. Because the tachometer gear 37 is installed on the main shaft 35, the rotational speed of the tachometer gear 37 is equal to that of the main shaft 35, and the rotational speed of the main shaft 35 can be measured by the tachometer sensor 38, so that the tachometer gear can be used for exploring the abrasion research of the swash plate-slipper friction pair under different rotational speeds and rotational speeds.
The motor 34 drives the two swash plate support plates 13 to rotate through the main shaft 35, and the swash plate is driven by the two swash plate support plates 13 to rotate, so that the swash plate-slipper friction pair is repeatedly rubbed, and the swash plate angle adjusting device is used for adjusting the angle of the swash plate when a test is carried out, so that the angle of the swash plate can be adjusted at will according to the requirement, and the abrasion test of the swash plate-slipper friction pair under different angles of the swash plate is realized.
The swash plate angle adjusting method comprises the following steps: firstly, unscrewing the preset bolts 42 to enable the swash plate to rotate at will in the two swash plate support plates 13, screwing the preset bolts 42 after the swash plate rotates to a required angle, and then adjusting the two support screws 15, wherein the tail ends of the two support screws 15 prop against the swash plate to enable the inclination angle of the swash plate to be fixed;
the loading mechanism presses the slipper to the swash plate, is used for adjusting the stress condition of the slipper on the swash plate, explores the abrasion condition of the friction pair of the swash plate and the slipper under different stress conditions, and controls the loading force by the method: the loading oil pump 27 outputs high-pressure oil, the three-position four-way valve 28 is adjusted to push out oil cavity oil supply of the piston rod to the hydraulic cylinder 32, the piston rod is pushed out for loading, after the required loading force is achieved, the three-position four-way valve 28 is adjusted to a pressure maintaining state, a test can be carried out, when the loading force is removed or reduced, the three-position four-way valve is adjusted to retract oil cavity oil supply of the piston rod to the hydraulic cylinder 32, the piston rod of the hydraulic cylinder 32 is retracted, the purpose of removing or reducing the loading force is achieved, and the loading mechanism has the advantages that the double-hydraulic control one-way valve is used as a locking element, the three-position four-way valve 28 can be locked at any position of the piston rod stroke for a long time, and the three-position four-way valve cannot be shifted due to external reasons.
The sliding shoe positioning and clamping machine is used for adjusting the relative positions of two sliding shoes and clamping and fixing the two sliding shoes so as to explore the influence of different sliding shoe rotation radiuses on friction, namely, the influence of different plunger distribution radiuses of the axial plunger pump on the abrasion condition of a swash plate-sliding shoe friction pair, and provides a reference for actual working conditions, and the method for adjusting the sliding shoe rotation diameters comprises the following steps: the hand wheel is rotated to drive the small bevel gear 5 to rotate so as to drive the large bevel gear 4 to rotate, the large bevel gear 4 drives the two positioning blocks 1 to move up and down along the two guide grooves 24 respectively, the cylinder 8 is positioned, after the rotation diameter required by the test is adjusted, the clamping block 3 is arranged on the fixed shell 2 so as to clamp the cylinder 8, and the adjusting bolt 26 is screwed.
The lubricating device is used for lubricating the swash plate-slipper friction pair, adjusting the pressure of lubricating oil supplied between the swash plate-slipper friction pair, a method for lubricating the swash plate-slipper friction pair and a method for changing the pressure of the lubricating oil: the oil pump 18 pumps oil into the oil hole 19, oil enters the oil hole 19 and then enters the through hole 20 through the oil feeding channel 21 so as to lubricate the shoe friction surface 12, so that the swash plate-shoe friction pair is lubricated, the throttle valve 22 is used for adjusting the pressure of the oil, and the change of the abrasion condition of the swash plate-shoe friction pair under different oil pressures can be explored.
When one or more friction influence factors among the inclination angle of the swash plate, the revolution number of the swash plate-shoe friction pair, the loading force, the rotation diameter of the shoe, the quality of the lubricating oil and the pressure of the lubricating oil are detected, the detected friction influence factors are not involved and remain the same in the comparison test to accurately obtain the influence of the friction influence factors to be detected on the swash plate-shoe friction pair. For example: when the influence of the loading force on the wear amount is tested, the inclination angle of the swash plate, the number of revolutions of the swash plate-shoe friction pair, the shoe rotation diameter, the quality of the lubricating oil, and the lubricating oil pressure are kept uniform in the front and rear tests.
The specific test process comprises the following steps: starting to test, wherein the swash plate rotates, as a certain angle exists in the swash plate, the plunger piston makes a piston motion in the cylinder body 8 along with the rotation of the swash plate, and the swash plate and the sliding shoes always keep a contact state under the action of the spring 10 in the cylinder body 8, at the moment, when the swash plate rotates, the friction of the friction pair of the swash plate and the sliding shoes can be continuously carried out, and the experiment is continuously carried out until the experiment is stopped after the set time;
performing a comparison experiment, namely replacing a new swash plate and two sliding shoes, if different loading forces are needed to be compared, changing the contact pressure (loading force) between the sliding shoes and the swash plate by a loading mechanism, keeping other friction influence factors unchanged, and then performing a test until the set time;
the abrasion conditions of the swash plate and the sliding shoes are compared before and after several times, so that the influence of loading force on the abrasion quantity and the abrasion mechanism of the friction pair of the swash plate and the sliding shoes is obtained; the number of tests may be two, three or more, which can be flexibly set as required.
In addition to the influence of loading force on the abrasion loss, the invention also provides a plurality of friction influence factors which influence the test result for the test, when one or more than two friction influence factors are tested to influence the abrasion loss, the influence of the friction influence factors on the abrasion loss and the abrasion mechanism of the swash plate-slipper friction pair can be obtained only by ensuring that other friction influence factors are unchanged and only changing the friction influence factors to be researched.
The method for testing the abrasion of the axial plunger pump swash plate-slipper friction pair by using the axial plunger pump swash plate-slipper friction pair abrasion testing device comprises the steps of testing the influence of at least one or more than two of different inclination angles of the swash plate, different rotating speeds, different loading forces, different slipper rotating diameters, different lubricating oil qualities and different lubricating oil pressures on the abrasion of the swash plate-slipper friction pair;
testing the influence of different inclined angles of the inclined plate on abrasion of the inclined plate-slipper friction pair;
pushing the swash plate to rotate in the circular groove 16 of the swash plate supporting plate 13, screwing the two supporting screws 15 when the swash plate reaches a set inclination angle, enabling the two supporting screws 15 to lean against the swash plate so as to keep the swash plate fixed under the set inclination angle, starting the axial plunger pump swash plate-slipper friction pair abrasion testing device to test, and stopping the axial plunger pump swash plate-slipper friction pair abrasion testing device when a set stopping condition is reached;
after the sliding shoes and the swash plate are replaced and the swash plate is adjusted to another set inclination angle, the two supporting screws 15 are twisted, so that the swash plate is fixedly connected, an axial plunger pump swash plate-sliding shoe friction pair abrasion testing device is started for testing, and when a set stopping condition is reached, the axial plunger pump swash plate-sliding shoe friction pair abrasion testing device is stopped;
comparing the skid shoes tested for each time to obtain the influence of the inclination angle of the swash plate on the abrasion of the friction pair of the swash plate and the skid shoes;
testing the influence of different rotation speeds on the abrasion of a swash plate-slipper friction pair;
starting a driving mechanism to enable the swash plate to perform friction test with the sliding shoes at a set rotating speed, and stopping the axial plunger pump swash plate-sliding shoe friction pair abrasion testing device when a set stopping condition is reached;
the sliding shoes and the swash plate are replaced, the driving mechanism is adjusted to enable the swash plate to carry out friction test with the sliding shoes at another set rotating speed, and when the set stopping condition is reached, the axial plunger pump swash plate-sliding shoe friction pair abrasion testing device is stopped;
comparing the skid shoes tested for each time so as to obtain the influence of the rotating speed of the swash plate on the abrasion of the friction pair of the swash plate and the skid shoes;
testing the influence of different loading forces on the abrasion of a swash plate-slipper friction pair;
the hydraulic cylinder 32 of the loading mechanism pushes the slipper positioning and clamping mechanism so as to increase the pressure between the slipper and the slipper, when the pressure is applied to a set pressure value, the axial plunger pump slipper-slipper friction pair abrasion testing device is started to test, and when the set stopping condition is reached, the axial plunger pump slipper-slipper friction pair abrasion testing device is stopped;
after the sliding shoes and the sloping cam plate are replaced, the hydraulic cylinders 32 of the loading mechanism are adjusted to push the sliding shoes to position and clamp the thrust of the mechanism, so that when the pressure between the sliding shoes and the sloping cam plate reaches another set pressure value, the sloping cam plate-sliding shoe friction pair abrasion testing device of the axial plunger pump is started to test, and when the set stopping condition is reached, the sloping cam plate-sliding shoe friction pair abrasion testing device of the axial plunger pump is stopped;
comparing the sliding shoes tested for each time so as to obtain the influence of loading force on the abrasion of the swash plate-sliding shoe friction pair;
testing the influence of different slipper rotation diameters on the abrasion of a swash plate-slipper friction pair;
the small bevel gear 5 is rotated to drive the large bevel gear 4, the large bevel gear 4 drives the two positioning blocks 1 to relatively move or oppositely move so as to change the rotating diameter of the two sliding shoes on the swash plate to a set position, an axial plunger pump swash plate-sliding shoe friction pair abrasion testing device is started to test, and when a set stopping condition is reached, the axial plunger pump swash plate-sliding shoe friction pair abrasion testing device is stopped;
the small bevel gear 5 is rotated after the swash plate and the two sliding shoes are replaced, the two positioning blocks 1 relatively move or move oppositely so as to adjust the rotation diameter of the two sliding shoes on the swash plate to another set position, an axial plunger pump swash plate-sliding shoe friction pair abrasion testing device is started for testing, and when a set stopping condition is reached, the axial plunger pump swash plate-sliding shoe friction pair abrasion testing device is stopped;
comparing the sliding shoes tested for each time so as to obtain the influence of the sliding shoe rotation diameter on the abrasion of the swash plate-sliding shoe friction pair;
testing the influence of different lubricating oil products on the abrasion of a swash plate-slipper friction pair;
applying lubricating oil on a friction surface 12 between the swash plate and the sliding shoes, starting an axial plunger pump swash plate-sliding shoe friction pair abrasion testing device to test, and stopping the axial plunger pump swash plate-sliding shoe friction pair abrasion testing device when a set stopping condition is reached;
after the skid shoes, the swash plate and the other quality of lubricating oil are replaced and the skid shoes are replaced, the lubricating device applies the other quality of lubricating oil on a friction surface 12 between the swash plate and the skid shoes, an axial plunger pump swash plate-skid shoe friction pair abrasion testing device is started for testing, and when a set stopping condition is reached, the axial plunger pump swash plate-skid shoe friction pair abrasion testing device is stopped;
comparing the sliding shoes tested for each time to obtain the influence of the lubricating oil on the abrasion of the swash plate-sliding shoe friction pair;
testing the influence of different lubricating oil pressures on the abrasion of a swash plate-slipper friction pair;
the lubrication device provides lubricating oil with set pressure on a friction surface 12 between the swash plate and the sliding shoes, starts a wear testing device of the swash plate-sliding shoe friction pair of the axial plunger pump for testing, and stops the wear testing device of the swash plate-sliding shoe friction pair of the axial plunger pump when a set stop condition is reached;
the sliding shoes and the swash plate are replaced, the lubricating device provides lubricating oil with another set pressure on a friction surface 12 between the swash plate and the sliding shoes, an axial plunger pump swash plate-sliding shoe friction pair abrasion testing device is started to test, and when a set stopping condition is reached, the axial plunger pump swash plate-sliding shoe friction pair abrasion testing device is stopped;
the shoes tested at each time are compared to obtain the influence of different lubricating oil pressures on the abrasion of the swash plate-shoe friction pair.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (10)
1. The device for testing the abrasion of the swash plate-sliding shoe friction pair of the axial plunger pump is characterized by comprising the following components: the device comprises a loading mechanism, a driving mechanism, a swash plate angle adjusting device and a slipper positioning and clamping mechanism, wherein the loading mechanism is connected with the slipper positioning and clamping mechanism, the swash plate angle adjusting device is installed on the driving mechanism, the slipper positioning and clamping mechanism comprises a bevel gear pair, a positioning block, a fixed shell, a clamping block and a plunger mechanism, the bevel gear pair is provided with a large bevel gear and a small bevel gear which are meshed with each other, an Archimedes spiral groove is formed on one side surface of the large bevel gear, an Archimedes spiral lug connected to the Archimedes spiral groove is formed on the positioning block, an adjusting channel is formed on the fixed shell, the adjusting channel is used for loading the clamping block, the clamping block can move along the adjusting channel to adjust the fixed position of the clamping block, a clamping section for clamping the plunger mechanism is formed between the positioning block and the clamping block, the plunger mechanism comprises a cylinder body, a plunger and a spring, the cylinder body is clamped in the clamping section, the plunger and the spring is arranged in the cylinder body, the spring is arranged at the bottom of the cylinder body to push the plunger, and the slipper is installed on the end of the plunger to extend out of the cylinder and contacts with a testing surface;
the two swash plate support plates are oppositely arranged at two sides of the swash plate, round grooves are formed in opposite sides of the two swash plate support plates, swash plate support cambered surfaces which are matched with the round grooves in the two swash plate support plates respectively and can slide relative to the round grooves are arranged at two sides of the swash plate, the two swash plate support plates are fixedly connected to the driving plate, adjusting screw holes are formed in the driving plate, corresponding to two radial sides of the swash plate, and the two supporting screw rods respectively penetrate through the two adjusting screw holes to be in contact with the swash plate so as to fix the inclined angle of the swash plate;
the lubricating device is used for applying lubricating oil to the friction surface of the sliding shoe and comprises an oil pump;
the cylinder body is provided with an annular connecting groove, and the positioning block and the clamping block are provided with convex parts which can be matched with the annular connecting groove.
2. The abrasion testing device for the swash plate-slipper friction pair of the axial plunger pump according to claim 1, wherein the cylinder is provided with an oil hole, the slipper is provided with a through hole communicated with the slipper friction surface, the plunger is provided with an oil feeding channel, an outlet of the oil feeding channel is communicated with the through hole, an oil inlet of the oil feeding channel is communicated with the oil hole, and the oil pump is communicated with the oil hole.
3. The axial piston pump swash plate-shoe friction pair wear testing device according to claim 2, wherein the lubrication device further includes a throttle valve for regulating the oil pressure of the lubricating oil and a pressure gauge for detecting the oil pressure of the lubricating oil, and the oil pump communicates with the oil hole through the throttle valve.
4. The axial plunger pump swash plate-slipper friction pair wear testing device according to claim 1, wherein the number of the positioning blocks and the number of the clamping blocks are two, the two plunger mechanisms are arranged in a one-to-one correspondence mode, and the two plunger mechanisms are respectively clamped in clamping intervals formed by the two positioning blocks and the clamping blocks.
5. The axial plunger pump swash plate-slipper friction pair wear testing device according to claim 4, wherein two guide grooves are radially formed in the fixed housing, two positioning blocks extend out of the guide grooves, a bearing mounting shaft extends out of the middle of the fixed housing, the device further comprises a gear bearing, the gear bearing is mounted on the bearing mounting shaft, and the large bevel gear is mounted on the gear bearing.
6. The axial plunger pump swash plate-slipper friction pair wear testing device of claim 1, wherein the clamping block comprises an adjusting bolt and an L-shaped clamping block, the adjusting bolt passing through the clamping block and then being connected to the adjusting channel.
7. The axial plunger pump swash plate-slipper friction pair abrasion testing device according to claim 1, wherein the loading mechanism comprises a loading oil pump, a three-position four-way valve, a double-hydraulic-control one-way valve, a loading regulating valve, an unloading regulating valve and a hydraulic cylinder, the three-position four-way valve is used for controlling the loading oil pump to pump oil to the loading regulating valve or the unloading regulating valve, the three-position four-way valve is respectively connected with the loading regulating valve and the unloading regulating valve through the double-hydraulic-control one-way valve, the loading regulating valve or the unloading regulating valve is respectively communicated with two oil cavities of the hydraulic cylinder, and a piston rod of the hydraulic cylinder is connected with the slipper positioning clamping mechanism; and a pressure sensor for detecting the magnitude of the loading force applied by the hydraulic cylinder.
8. The axial piston pump swash plate-slipper friction pair wear test device according to claim 1, wherein the swash plate angle adjustment device further comprises a pre-positioning bolt, the swash plate support plate having a positioning arc slot through which the pre-positioning bolt is connected to the swash plate;
the connecting position of the sliding shoe and the plunger is provided with a spherical groove, the end part of the plunger matched with the sliding shoe is a spherical end head, and the spherical end head is matched into the spherical groove.
9. The abrasion testing device for the swash plate-slipper friction pair of the axial plunger pump according to claim 1, wherein the driving mechanism comprises a motor, a main shaft, a housing, a speed measuring gear and a speed measuring sensor, the main shaft is mounted on the housing, the motor is connected with the main shaft, the speed measuring gear is fixedly sleeved on the main shaft, the speed measuring sensor is arranged corresponding to the speed measuring gear, and the speed measuring sensor is used for detecting the rotating speed of the speed measuring gear.
10. A method of testing wear of a swash plate-shoe friction pair of an axial piston pump using the device for testing wear of a swash plate-shoe friction pair of an axial piston pump of any one of claims 1 to 9, comprising: the method comprises the steps of testing at least one or more than two of different inclined angles of the swash plate, different rotating speeds, different loading forces, different rotating diameters of the sliding shoes, different lubricating oil qualities and different lubricating oil pressures to influence abrasion of a friction pair of the swash plate and the sliding shoes;
testing the influence of different inclined angles of the inclined plate on abrasion of the inclined plate-slipper friction pair;
pushing the swash plate to rotate in the circular groove of the swash plate support plate, screwing the two support screws when the swash plate reaches a set inclination angle, enabling the two support screws to abut against the swash plate so as to keep the swash plate fixed under the set inclination angle, starting the axial plunger pump swash plate-slipper friction pair abrasion testing device to test, and stopping the axial plunger pump swash plate-slipper friction pair abrasion testing device when the set stopping condition is reached;
after the sliding shoes and the swash plate are replaced and the swash plate is adjusted to another set inclination angle, the two supporting screws are twisted, so that the swash plate is fixedly connected, an axial plunger pump swash plate-sliding shoe friction pair abrasion testing device is started for testing, and when a set stopping condition is reached, the axial plunger pump swash plate-sliding shoe friction pair abrasion testing device is stopped;
comparing the skid shoes and/or the swash plate tested for each time to obtain the influence of the inclination angle of the swash plate on the abrasion of the friction pair of the swash plate and the skid shoes;
testing the influence of different rotation speeds on the abrasion of a swash plate-slipper friction pair;
starting a driving mechanism to enable the swash plate to perform friction test with the sliding shoes at a set rotating speed, and stopping the axial plunger pump swash plate-sliding shoe friction pair abrasion testing device when a set stopping condition is reached;
the sliding shoes and the swash plate are replaced, the driving mechanism is adjusted to enable the swash plate to carry out friction test with the sliding shoes at another set rotating speed, and when the set stopping condition is reached, the axial plunger pump swash plate-sliding shoe friction pair abrasion testing device is stopped;
comparing the skid shoes and/or the swash plate tested for each time to obtain the influence of the rotation speed of the swash plate on the abrasion of the friction pair of the swash plate and the skid shoes;
testing the influence of different loading forces on the abrasion of a swash plate-slipper friction pair;
the hydraulic cylinder of the loading mechanism pushes the sliding shoe positioning and clamping mechanism so as to increase the pressure between the sliding shoes and the sloping cam plate, when the pressure is applied to a set pressure value, the sloping cam plate-sliding shoe friction pair abrasion testing device of the axial plunger pump is started to test, and when the set stopping condition is reached, the sloping cam plate-sliding shoe friction pair abrasion testing device of the axial plunger pump is stopped;
after the sliding shoes and the sloping cam plate are replaced, the hydraulic cylinders of the loading mechanism are adjusted to push the sliding shoes to position and clamp the thrust of the mechanism, so that when the pressure between the sliding shoes and the sloping cam plate reaches another set pressure value, the sloping cam plate-sliding shoe friction pair abrasion testing device of the axial plunger pump is started to test, and when the set stopping condition is reached, the sloping cam plate-sliding shoe friction pair abrasion testing device of the axial plunger pump is stopped;
comparing the skid shoes and/or the swash plate tested for each time to obtain the influence of loading force on the abrasion of the friction pair of the swash plate and the skid shoes;
testing the influence of different slipper rotation diameters on the abrasion of a swash plate-slipper friction pair;
the small bevel gear is rotated to drive the large bevel gear, the large bevel gear drives the two positioning blocks to relatively move or oppositely move so as to change the rotating diameter of the two sliding shoes on the swash plate to a set position, the axial plunger pump swash plate-sliding shoe friction pair abrasion testing device is started to test, and when a set stopping condition is reached, the axial plunger pump swash plate-sliding shoe friction pair abrasion testing device is stopped;
the small bevel gears are rotated after the swash plate and the two sliding shoes are replaced, the two positioning blocks relatively move or oppositely move so as to adjust the rotation diameter of the two sliding shoes on the swash plate to another set position, an axial plunger pump swash plate-sliding shoe friction pair abrasion testing device is started for testing, and when a set stopping condition is reached, the axial plunger pump swash plate-sliding shoe friction pair abrasion testing device is stopped;
comparing the skid shoes and/or the swash plate tested for each time to obtain the influence of the rotation diameter of the skid shoes on the abrasion of the friction pair of the swash plate and the skid shoes;
testing the influence of different lubricating oil products on the abrasion of a swash plate-slipper friction pair;
applying lubricating oil on a friction surface between a swash plate and a slipper, starting an axial plunger pump swash plate-slipper friction pair abrasion testing device to test, and stopping the axial plunger pump swash plate-slipper friction pair abrasion testing device when a set stopping condition is reached;
the method comprises the steps of replacing skid shoes, a sloping cam plate and another quality of lubricating oil, applying the another quality of lubricating oil on a friction surface between the sloping cam plate and the skid shoes, starting an axial plunger pump sloping cam plate-skid shoe friction pair abrasion testing device to test, and stopping the axial plunger pump sloping cam plate-skid shoe friction pair abrasion testing device when a set stopping condition is reached;
comparing the skid shoes and/or the sloping cam plate tested for each time so as to obtain the influence of lubricating oil on the wearing of the sloping cam plate-skid shoe friction pair;
testing the influence of different lubricating oil pressures on the abrasion of a swash plate-slipper friction pair;
providing lubricating oil with set pressure on a friction surface between a swash plate and a slipper, starting an axial plunger pump swash plate-slipper friction pair abrasion testing device to test, and stopping the axial plunger pump swash plate-slipper friction pair abrasion testing device when a set stop condition is reached;
the method comprises the steps of replacing a slipper and a slipper, providing lubricating oil with another set pressure on a friction surface between the slipper and the slipper, starting an axial plunger pump slipper friction pair abrasion testing device to test, and stopping the axial plunger pump slipper friction pair abrasion testing device when a set stop condition is reached;
the shoes and/or swashplate of each test are compared to derive the effect of different lubricating oil pressures on the wear of the swashplate-shoe friction pair.
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| CN115306698A (en) * | 2022-07-08 | 2022-11-08 | 潍柴动力股份有限公司 | Wear testing device |
| CN115045825B (en) * | 2022-07-22 | 2023-01-06 | 清华大学 | Plunger pump piston shoe pair testing tool |
| CN118032324B (en) * | 2024-04-09 | 2024-06-14 | 山东科技大学 | Friction and wear test method for multiple kinematic pairs of axial plunger pump |
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