CN108398262B - Wet friction pair belt row torque test bed and test method - Google Patents

Wet friction pair belt row torque test bed and test method Download PDF

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Publication number
CN108398262B
CN108398262B CN201810127263.7A CN201810127263A CN108398262B CN 108398262 B CN108398262 B CN 108398262B CN 201810127263 A CN201810127263 A CN 201810127263A CN 108398262 B CN108398262 B CN 108398262B
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output shaft
friction
oil
torque
input shaft
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CN108398262A (en
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王延忠
窦德龙
李圆
汪大鹏
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GUILIN GUIBEI MACHINE CO Ltd
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Beihang University
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00Testing of machine parts
    • G01M13/02Gearings; Transmission mechanisms
    • G01M13/025Test-benches with rotational drive means and loading means; Load or drive simulation
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L3/00Measuring torque, work, mechanical power, or mechanical efficiency, in general
    • G01L3/02Rotary-transmission dynamometers
    • G01L3/04Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

The invention relates to a wet friction pair belt-driven torque test bed and a test method, and belongs to the technical field of clutch friction pair testing machines. The driving motor, the inertia wheel, the input shaft, the output shaft and the torque sensor are sequentially and coaxially arranged on the support, and the inertia wheel is fixedly connected with the input shaft; the input shaft is integrated with a clutch drum, oil discharge holes are uniformly distributed on the drum, and the inner side of the drum is provided with an internal spline groove; an oil cylinder is integrated on the output shaft, a piston is arranged in the oil cylinder, an external spline is arranged at one end of the shaft, a lubricating oil duct is arranged in the external spline, and a plurality of lubricating oil outlet holes are uniformly distributed on one side of the spline on the shaft; one end of the torque sensor is connected with the output shaft, and the other end of the torque sensor is fixed with the output end support; the friction plate is connected with the inner spline groove of the clutch drum through the outer spline, the dual steel sheet is connected with the outer spline of the output shaft through the inner spline teeth, and the friction plate and the dual steel sheet can move along the output shaft in an axially staggered mode. The invention can measure the belt row torque when a single pair or a plurality of pairs of friction pairs consisting of friction plates and dual steel sheets are immersed in oil, and the structure of the test bed is not complex.

Description

Wet friction pair belt row torque test bed and test method
Technical Field
The invention relates to a wet friction pair belt-driven torque test bed and a test method, and belongs to the technical field of clutch friction pair testing machines.
Background
The wet type multi-plate friction clutch is used as one of key parts of an automobile automatic transmission, and the performance of the wet type multi-plate friction clutch directly influences the gear shifting smoothness and riding comfort of an automobile. The automobile clutch is tested, and the automobile clutch testing method mainly comprises two schemes of a whole automobile test and a bench test: the whole vehicle test method is direct and reliable, but has the defects that the arrangement and the installation of the sensors are limited by space, the data acquisition is inconvenient and the like. At present, a bench test scheme is mostly adopted in a method for testing a wet type multi-plate friction clutch. One very important item in the bench test is to measure the belt-row torque of wet-type multi-plate friction pairs in the clutch, lubricating oil is filled between each pair of friction pairs of the wet-type clutch, and when a rotating speed difference exists between a driving plate and a driven plate of the friction pairs, the belt-row torque can be generated by the shearing action of an oil film, so that the belt-row loss is caused, and the transmission efficiency of the transmission is reduced.
At present, two test beds are mainly used for specially testing the torque of the belt row of the friction pair of the clutch, one design is that a single friction device simplified by a test piece is adopted, for example, the test beds developed for testing the torque of the belt row of the clutch by students in China and abroad are Wang and Aphale and the like, but the test bed is greatly different from an actual wet-type multi-sheet friction pair and cannot accurately reflect the working condition of the torque of the belt row of the wet-type multi-sheet friction pair. The other design is that a friction clutch test bed simulating the working condition of the brake carries out a belt-row torque test, such as foreign SAE #1 and SAE #2 test beds, but the method is not suitable for testing the engagement dynamic performance of a multi-plate friction pair of the clutch, and simultaneously, the measured value comprises the interference torque caused by bearing friction and oil stirring loss.
Disclosure of Invention
The technical problem of the invention is solved: the test bed and the test method for the wet friction pair belt row torque overcome the defects of the prior art, and change the existing design of the wet multi-sheet friction pair test bed aiming at the problems of the existing test bed, so that the device has a simple and reliable structure, can accurately measure the cooling oil flow of the friction pair and the oil flushing pressure of the friction pair in the drum in the jointing process, and can eliminate the influence of the oil stirring loss of a bearing on the belt row torque measurement.
The technical scheme of the invention is as follows: a wet friction subband row torque test stand, comprising: the device comprises a driving motor, an inertia wheel, an input shaft, an output shaft, a rotating speed sensor, a pressure sensor, a torque sensor and a support; the driving motor, the input shaft, the output shaft and the torque sensor are sequentially and coaxially connected and installed on the motor support, the input end support and the output end support, the torque sensor is used for measuring the belt-row torque of a friction pair formed by a single pair or multiple pairs of friction plates and dual steel sheets during oil immersion, one end of the torque sensor is connected with the output shaft, and the other end of the torque sensor is fixed with the output end support; the inertia wheel is fixedly connected with the input shaft; the pressure sensor is arranged on a pressure sensor connecting hole of the output shaft oil cylinder; the input shaft and the output shaft form a single pair or a plurality of pairs of friction pairs through a single piece or two to three friction plates and a dual steel sheet and are supported and connected through a bearing; the rotating speed sensor is fixed on an input end support at one side of the driving motor, and the induction magnet of the rotating speed sensor is embedded in the equal-height position of the inertia wheel and the opposite surface of the rotating speed sensor.
A clutch drum is integrated on the input shaft, 8-10 lubricating oil drain holes with the diameter of 3-4mm are uniformly distributed on the clutch drum, and an inner spline groove is formed in the inner side of the clutch drum for mounting a friction plate; an integrated oil cylinder is arranged on the output shaft, and a piston is arranged in the integrated oil cylinder; an external spline is arranged at one end of the output shaft and is provided with a dual steel sheet, and a friction pair is formed on the contact surface of the dual steel sheet and the friction plate; the output shaft is internally provided with a lubricating oil duct, the oil duct comprises a main oil duct and two groups of 16-20 lubricating oil outlet holes with the diameter of 3-4mm, the main oil duct is arranged along the axis of the output shaft, and the lubricating oil outlet holes are uniformly distributed on one side of the external spline on the output shaft.
The friction plate is connected with the inner spline groove through an outer spline, and the dual steel sheet is connected with the outer spline on the output shaft through an inner spline.
The single plate or two to three friction plates and the dual steel plates can axially move along the axial direction of the output shaft in a staggered arrangement.
The input shaft is integrated with a clutch drum, a plurality of oil through holes are uniformly distributed on the clutch drum, and the inner side of the clutch drum is provided with an inner spline groove for mounting a friction plate.
One end of the torque sensor is connected with the output shaft through a bolt, and the other end of the torque sensor is fixed with the output end support through a bolt.
The inertia wheel is circumferentially fixed on the input shaft through a flat key.
A test method of a wet friction pair belt row torque test bed comprises the following steps: when the test bed works, the driving motor raises the rotating speed of the inertia wheel, the input shaft and the friction plates in the clutch drum on the input shaft to a preset rotating speed and then disengages, the inertia wheel drives the input shaft and the friction plates to rotate, the external hydraulic station controls oil filled in the oil cylinder to push the piston to tightly press the dual steel sheets and the friction plates, the clutch is combined, lubricating oil with certain pressure is injected into the clutch drum through the lubricating oil duct arranged in the output shaft to play a role in lubricating and cooling, and the lubricating oil is thrown out of the clutch drum from the oil discharge hole under the centrifugal action of the rotation of the clutch; the belt-row torque of a friction pair formed by a friction plate and a dual steel sheet is measured by a torque sensor, the oil pressure in an oil cylinder is measured by a pressure sensor arranged on an output shaft oil cylinder, the rotating speed of the input shaft is measured by a rotating speed sensor arranged on an input end support by utilizing an induction magnet of a rotating speed sensor on an inertia wheel, and the measured signal is collected and processed by a multi-channel data collection card and a computer.
Compared with the prior art, the invention has the advantages that: the wet friction pair belt row torque test bed can measure the belt row torque when a single pair or a plurality of pairs of friction pairs consisting of friction plates and dual steel sheets are immersed in oil, and various sensors are arranged externally, so that the wet friction pair belt row torque test bed is easy to install, convenient to acquire data and simple and reliable in overall structure.
Drawings
FIG. 1 is a cross-sectional view of a wet multi-plate friction sub-belt row torque test stand of the present invention;
FIG. 2 is a cross-sectional view of the overall system of the test stand of the present invention;
FIG. 3 is an isometric view of a test stand of the present invention;
FIG. 4 is a perspective view of the output shaft of the present invention;
FIG. 5 is a perspective view of the input shaft of the present invention;
the reference numerals in the drawings mean:
1-a torque sensor; 2-first set of hex head bolts; 3, an output shaft screw plug; 4-output end support; 5-an output shaft; 6, a piston; 7-input shaft; 8-a first deep groove ball bearing; 9-inertia wheel; 10-input end support; 11-second deep groove ball bearing; 12-angular contact ball bearings; 13-circlip for first shaft; 14, pressing a first steel sheet; 15-friction plate; 16-dual steel sheets; 17-pressing a second steel sheet; 18-sealing ring for hole; 19-sealing ring for shaft; 20-third deep groove ball bearing; 21-a flange plate; 22-second set of hex head bolts; 23-driving a motor; 24-a motor support; 25-a rotational speed sensor; 26-an induction magnet; 27-a pressure sensor; 28-lubricating oil outlet; 29-pressure oil injection hole; 30-pressure sensor attachment hole; 31 — a lubricant inlet; 32-oil drain hole;
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
As shown in fig. 1 to 3, the wet friction pair belt row torque test bed provided by the invention comprises: the drive motor 23, the flywheel 9, the input shaft 7, the output shaft 5, the rotational speed sensor 25, the pressure sensor 27, the torque sensor 1, the input end support 10, the output end support 4, and the motor support 24. The driving motor 23 is connected with the input shaft 7 through a coupler, the inertia wheel 9 is circumferentially fixed on the input shaft 7 through a flat key, the input shaft 7 and the output shaft 5 form a plurality of pairs of friction pairs through a plurality of pairs of friction plates 15 and a pair of steel sheets 16 and are supported and connected through an angular contact ball bearing 12, the input shaft 7 is supported on the input end support 10 through a first deep groove ball bearing 8 and a second deep groove ball bearing 11, and the output shaft 5 is supported on the output end support 4 through a third deep groove ball bearing 20. The output shaft 5 and the torque sensor 1 are connected through a flange 21 by a second group of hexagon bolts 22, and finally the driving motor 23, the input shaft 7, the output shaft 5 and the torque sensor 1 are coaxially connected in sequence and are arranged on a motor support 24, an input end support 10 and an output end support 4 through deep groove ball bearings.
As shown in figure 5, a clutch drum is integrated on the input shaft 7, 8 oil drain holes 32 with the diameter of 3 mm are uniformly distributed on the drum in the circumferential direction, and the inner side of the drum is provided with an internal spline groove.
As shown in fig. 4, an oil cylinder is integrated on the output shaft 5 and a piston 6 is arranged in the oil cylinder, a sealing ring 18 for a circular groove mounting hole and a sealing ring 19 for a shaft are respectively arranged on the inner side and the outer side of the piston 6, a pressure oil filling hole 29 connected with a hydraulic pump and a pressure sensor connecting hole 30 for installing a pressure sensor 27 are arranged on the oil cylinder, an external spline and a lubricating oil duct are arranged at one end of the shaft, a main oil duct is arranged along the axis direction, two groups (8 in each group) of lubricating oil outlet holes 28 are uniformly distributed on one side of the external spline on the shaft, and the other end of the main oil duct is sealed by an output. One end of the torque sensor 1 is connected with an output shaft 5 through a flange 21 by bolts, and the other end of the torque sensor is fixed with an output end support 4 through a first group of hexagon head bolts 2. The friction plate 15 is connected with an inner spline groove of the clutch drum through an outer spline, the dual steel sheet 16 is connected with an outer spline on the output shaft through an inner spline tooth, a plurality of pairs of friction plates and dual steel sheets are axially staggered, and the surface of each friction plate and the surface of the dual steel sheet form a pair of friction pairs which can axially move along the output shaft.
The working process of the test bed of the invention is described in detail below with reference to the accompanying drawings:
when the test bench works, after the driving motor 23 raises the rotating speed of the inertia wheel 9 and the friction plate 15 in the clutch drum on the input shaft to the expected rotating speed (such as 1000r/min), the driving motor 23 is disengaged, the inertia wheel 9 drives the input shaft 7 and the friction plate 15 to rotate, lubricating oil with certain pressure is injected into the clutch drum through a lubricating oil inlet 31 and an output shaft oil duct by an external hydraulic station to play a role of lubricating and cooling, lubricating oil is filled between each pair of friction pairs formed by the surfaces of the friction plate 15 and the dual steel sheets 16, a large rotating speed difference exists between the friction plate 15 and the dual steel sheets 16 forming the friction pairs, the shearing action of the oil film can generate dragging torque, namely the belt discharging torque, so that belt discharging loss is caused, the lubricating oil is continuously thrown out of the clutch drum under the centrifugal action of the rotation of the clutch, in the process, the magnitude of the wet friction secondary belt torque can be measured by the torque sensor 1 connected with the output shaft 5.
When a hydraulic station is controlled to fill hydraulic oil into an oil cylinder, a piston 6 and a second steel sheet pressing piece 17 are pushed to tightly press a dual steel sheet 16 and a friction sheet 15, a plurality of friction pairs are jointed, a first steel sheet pressing piece 14 and a first shaft play an axial limiting role in the stroke of the piston 6 through an elastic retainer ring 13, the change of belt-discharge torque of a wet friction pair in the combination process can be measured through a torque sensor 1, and finally, under the action of friction force, the rotating speeds of an inertia wheel 9 and the friction sheet 15 in a clutch drum gradually decrease to zero. In the experimental process, the torque sensor 1 is used for measuring the wet friction pair belt discharge torque, the pressure sensor 27 is used for measuring the oil pressure in the oil cylinder, the rotating speed sensor 25 and the induction magnet 26 on the inertia wheel are used for measuring the rotating speed of the input shaft 7, and the multichannel data acquisition card and the computer are used for carrying out signal acquisition and processing. The signal acquisition of the rotating speed sensor 25 is to record the pulse times in the sampling time, namely the times of the induction magnet 26 rotating the rotating speed sensor 25, through a data acquisition card so as to acquire the rotating speed frequency, and the rotating speed value is calculated through software matched with the data acquisition card on a computer; the torque sensor 1 outputs a voltage signal, and a voltage value measured by software matched with the data acquisition card on a computer is acquired by the data acquisition card and converted with the measuring range of the torque sensor 1 to obtain a measured torque value.
The invention can measure the belt row torque when a single pair or a plurality of pairs of friction pairs consisting of friction plates and dual steel sheets are immersed in oil, and the structure of the test bed is not complex.
The above examples are provided only for the purpose of describing the present invention, and are not intended to limit the scope of the present invention. The scope of the invention is defined by the appended claims. Various equivalent substitutions and modifications can be made without departing from the spirit and principles of the invention, and are intended to be within the scope of the invention.

Claims (2)

1. A wet friction subband row torque test bench is characterized by comprising: the device comprises a driving motor, an inertia wheel, an input shaft, an output shaft, a rotating speed sensor, a pressure sensor, a torque sensor and a support; the driving motor, the input shaft, the output shaft and the torque sensor are sequentially and coaxially connected and installed on the motor support, the input end support and the output end support, the torque sensor is used for measuring the belt-row torque of a friction pair formed by a single pair or multiple pairs of friction plates and dual steel sheets during oil immersion, one end of the torque sensor is connected with the output shaft, and the other end of the torque sensor is fixed with the output end support; the inertia wheel is fixedly connected with the input shaft; the pressure sensor is arranged on a pressure sensor connecting hole of the output shaft oil cylinder; the input shaft and the output shaft form a single pair or a plurality of pairs of friction pairs through a single piece or two to three friction plates and a dual steel sheet and are supported and connected through a bearing; the rotating speed sensor is fixed on an input end support at one side of the driving motor, and an induction magnet of the rotating speed sensor is embedded in the equal-height position of the surface, opposite to the rotating speed sensor, of the inertia wheel;
a clutch drum is integrated on the input shaft, 8-10 lubricating oil drain holes with the diameter of 3-4mm are uniformly distributed on the clutch drum, and an inner spline groove is formed in the inner side of the clutch drum for mounting a friction plate; an integrated oil cylinder is arranged on the output shaft, and a piston is arranged in the integrated oil cylinder; an external spline is arranged at one end of the output shaft and is provided with a dual steel sheet, and a friction pair is formed on the contact surface of the dual steel sheet and the friction plate; the output shaft is internally provided with a lubricating oil duct, the oil duct comprises a main oil duct and two groups of 16-20 lubricating oil outlet holes with the diameter of 3-4mm, the main oil duct is arranged along the axis of the output shaft, and the lubricating oil outlet holes are uniformly distributed on one side of the external spline on the output shaft;
the friction plate is connected with the inner spline groove of the clutch drum through an outer spline, and the dual steel sheet is connected with the outer spline on the output shaft through an inner spline;
the single plate or two to three friction plates and the dual steel plates are axially staggered and can move along the axial direction of the output shaft;
a clutch drum is integrated on the input shaft, a plurality of oil discharge holes are uniformly distributed on the clutch drum, and an internal spline groove is formed in the inner side of the clutch drum for mounting a friction plate;
one end of the torque sensor is connected with the output shaft through a bolt, and the other end of the torque sensor is fixed with the output end support through a bolt;
the inertia wheel is circumferentially fixed on the input shaft through a flat key.
2. The test method of the wet friction pair belt-drain torque test bed according to claim 1, characterized by comprising the steps of: when the test bed works, the driving motor raises the rotating speed of the inertia wheel, the input shaft and the friction plates in the clutch drum on the input shaft to a preset rotating speed and then disengages, the inertia wheel drives the input shaft and the friction plates to rotate, the external hydraulic station controls oil filled in the oil cylinder to push the piston to tightly press the dual steel sheets and the friction plates, the clutch is engaged, lubricating oil with certain pressure is injected into the clutch drum through a lubricating oil duct arranged in the output shaft to play a role in lubricating and cooling, and the lubricating oil is thrown out of the clutch drum from an oil discharge hole under the centrifugal action of the rotation of the clutch; the belt-row torque of a friction pair formed by a friction plate and a dual steel sheet is measured by a torque sensor, the oil pressure in an oil cylinder is measured by a pressure sensor arranged on an output shaft oil cylinder, the rotating speed of the input shaft is measured by a rotating speed sensor arranged on an input end support by utilizing an induction magnet of a rotating speed sensor on an inertia wheel, and the measured signal is collected and processed by a multi-channel data collection card and a computer.
CN201810127263.7A 2018-02-08 2018-02-08 Wet friction pair belt row torque test bed and test method Active CN108398262B (en)

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