CN111365401A - Liquid resistance suspension runner test tool - Google Patents

Liquid resistance suspension runner test tool Download PDF

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Publication number
CN111365401A
CN111365401A CN202010106924.5A CN202010106924A CN111365401A CN 111365401 A CN111365401 A CN 111365401A CN 202010106924 A CN202010106924 A CN 202010106924A CN 111365401 A CN111365401 A CN 111365401A
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Prior art keywords
flow channel
liquid
cylinder body
liquid chamber
hydraulic
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CN202010106924.5A
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牟南沙
上官文斌
何青
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South China University of Technology SCUT
Ningbo Tuopu Group Co Ltd
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South China University of Technology SCUT
Ningbo Tuopu Group Co Ltd
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Priority to CN202010106924.5A priority Critical patent/CN111365401A/en
Publication of CN111365401A publication Critical patent/CN111365401A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3264—Arrangements for indicating, e.g. fluid level; Arrangements for checking dampers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

The invention discloses a liquid resistance suspension flow channel testing tool. The design aim is to provide a tool capable of testing flow channel parameters for the liquid resistance suspension modular design work. The parts of the liquid resistance suspension flow channel test tool mainly comprise a liquid inlet sealing rod, a hydraulic cylinder body, a piston, a middle cylinder body, an upper flow channel fixing plate, a lower flow channel fixing plate, a leather cup and a base. The hydraulic cylinder and the middle cylinder body are sealed to form an upper liquid chamber, the middle cylinder body and the leather cup are sealed to form a lower liquid chamber, and the upper liquid chamber and the lower liquid chamber are communicated through a flow channel used in actual testing. The piston in the upper liquid chamber reciprocates along with the testing device actuator to drive the damping liquid in the liquid cavity to flow up and down, and the hydraulic pressure difference results generated in the upper liquid chamber and the lower liquid chamber are acquired by sensors arranged at the inlet and the outlet of the flow passage. The invention can be used for collecting the hydraulic pressure difference and flow data generated by the piston when the damping fluid in the fluid cavity flows through the flow channel, thereby providing help for calculating the fluid sense and the fluid resistance of the flow channel.

Description

Liquid resistance suspension runner test tool
Technical Field
The invention relates to a structure for testing an engine supporting component, in particular to a hydraulic resistance suspension flow channel testing tool.
Technical Field
At present, an automobile power assembly system and an automobile body are mostly connected through a suspension, and the suspension mainly plays the following roles:
1. supporting the power assembly;
2. reducing low frequency vibrations transmitted by the vehicle body to the powertrain by damping vibration attenuation energy (passive vibration isolation);
3. reducing high frequency vibrations transmitted by the powertrain to the vehicle body by damping vibration attenuation energy (active vibration isolation);
4. the displacement of the power assembly under various working conditions is limited, and the problems of translocation, interference, separation and the like among connecting parts are avoided;
the suspension system generally adopts a three-point arrangement or a four-point arrangement, the three-point arrangement is respectively provided with a left suspension, a right suspension and a rear suspension on a power assembly, and the four-point arrangement is usually additionally provided with a front suspension or a rear suspension on the basis of the three-point arrangement. In the past, pure rubber suspensions are basically adopted for vibration reduction and isolation, the pure rubber suspensions have high rigidity in a low frequency band (0-50Hz) and can effectively attenuate vibration, the rigidity of the pure rubber suspensions is increased in a high frequency band (50-200Hz) due to the characteristic of high-frequency hardening of rubber, however, effective vibration isolation is realized in the high frequency band of a power system, the rigidity of suspension parts must be ensured to be low, and therefore the pure rubber suspensions cannot well meet the use requirements. In order to change the situation that a suspension system is difficult to effectively isolate vibration in a high-frequency range, the current automobile gradually begins to adopt liquid resistance suspension, two liquid passages are formed between two runner plates, and the liquid passages are switched through different motion forms of a decoupling film placed inside in low-frequency and high-frequency working conditions, so that the liquid resistance and liquid inductance are changed by fluid change flow passages between an upper liquid chamber and a lower liquid chamber of the suspension under different working conditions, the vibration attenuation effect of large rigidity and large damping which is generally good in the low-frequency range like pure rubber suspension is realized, and the rigidity and the damping are reduced in the high-frequency range to obtain good vibration isolation effect.
The hydraulic resistance suspension flow channel testing tool will be explained in detail according to fig. 1 and 2 and technical principles.
In order to perform a specific and effective research on the liquid resistance suspension, the liquid resistance suspension is generally described by using a lumped parameter model.
Wherein m isrMass of the rubber main spring, brDamping for rubber main springs, krIs the stiffness of the rubber main spring, ArEquivalent piston area, F is the reaction force on the main rubber spring in suspension to the hydraulic resistance, IiAnd RiRespectively the fluid sense and the fluid resistance of the flow channel, qiIs the volume flow (m) of the liquid in the flow passage3/s)，p1And p2Hydraulic pressure in upper and lower chambers, respectively, C1And C2The volume flexibility of the upper liquid chamber and the volume flexibility of the lower liquid chamber are respectively corresponding to the volume rigidity K of the upper liquid chamber and the lower liquid chamber1、K2The liquid chamber volume stiffness indicates a pressure change caused by a volume change of the liquid chamber,
Figure BDA0002388428660000011
Figure BDA0002388428660000012
ξrthe damping ratio of the rubber is generally 0.025-0.075 of natural rubber damping ratio and natural rubber D.
According to the established liquid resistance suspension lumped parameter model, the following equations in the time domain can be written:
Figure BDA0002388428660000013
according to the hydraulic pressure difference of the inlet and the outlet of the flow channel, the method comprises the following steps:
Figure BDA0002388428660000021
the relationship between the liquid flow and the hydraulic pressure in the upper liquid chamber and the lower liquid chamber is as follows:
Figure BDA0002388428660000022
Figure BDA0002388428660000023
assuming an initial condition of zero, Laplace transform can be performed on the expression to obtain
(mrs2+brs+kr)x1(s)+Arp1(s)＝F(s) (6)
(Iis+Ri)qi(s)＝Δp(s) (7)
Arsx1(s)-qi(s)＝C1sp1(s) (8)
qi(s)＝C2sp2(s) (9)
And a corresponding functional block diagram can be made.
Simplified in the Laplace domain from the functional block diagram
Figure BDA0002388428660000024
Further, the suspension support reaction force F can be obtainedTRatio of load displacement in the Laplace domain
Figure BDA0002388428660000025
Let s be j ω, which is obtained in the frequency domain
Figure BDA0002388428660000026
Damping angle
Figure BDA0002388428660000027
Is composed of
Figure BDA0002388428660000028
The dynamic stiffness K and the damping angle of the liquid resistance suspension in different frequency bands can be obtained by substituting all parameters of the parameter identification acquisition system
Figure BDA0002388428660000029
Disclosure of Invention
Although many documents relate to theoretical researches on the complete influence of each component of the liquid resistance suspension on the overall performance of the liquid resistance suspension, the theories can only indicate the direction of the design of the liquid resistance suspension from a qualitative angle and cannot provide quantitative guidance. If can realize that the liquid hinders suspension main spring, go up liquid chamber, runner, lower liquid chamber modularization, carry out the prediction of suspension performance through lumped parameter model, can realize quick effective prediction on the one hand, on the other hand also be convenient for the same structure and use again in other liquid hinders the suspension structure, possesses the portability, reduces the design degree of difficulty, improves design efficiency.
A hydraulic resistance suspension flow channel test tool is composed of a liquid inlet sealing rod, a piston, an upper hydraulic cylinder body, a middle cylinder body, a leather cup and a base;
the piston is assembled in the upper hydraulic cylinder body, and the piston rod extends out of a small hole in the top of the upper hydraulic cylinder body; the liquid inlet sealing rod is used for sealing the liquid cavity after the device is filled with liquid, is matched with the piston rod through a pipe thread, and the head of the liquid inlet sealing rod is matched with an actuator used for testing to achieve the effect of load transfer;
the outer ring of the upper hydraulic cylinder body is provided with pipe threads which are matched with pipe threads on the inner wall surface of the upper part of the middle cylinder body to seal the liquid cavity;
the outer circle of groove at the bottom of the middle cylinder body is matched with the rubber cup, and the rubber cup is fixed on the rubber cup through vulcanization; the outer ring of the lower part of the middle cylinder body is provided with threads which are matched with the threads of the inner wall surface of the upper part of the base;
the base is provided with two bolt hole sites, and the whole set of tool is fixed on the test bench through bolts.
Further, the hydraulic cylinder consists of an upper hydraulic cylinder body and a middle cylinder body, the upper hydraulic cylinder body is positioned above the middle cylinder body, a liquid chamber is arranged inside the hydraulic cylinder, and the liquid chamber consists of an upper liquid chamber, a flow channel and a lower liquid chamber from top to bottom;
the hydraulic cylinder comprises a liquid inlet sealing rod, a piston and a hydraulic cylinder body and is used for transmitting load generated by the testing device actuator;
the upper liquid chamber and the lower liquid chamber are respectively independent, and are communicated through a flow passage to perform liquid exchange.
Furthermore, the top end of the piston rod is provided with a through hole for filling damping liquid into the liquid cavity before the test starts and sucking the damping liquid in the liquid cavity out of the liquid cavity after the test is finished.
Further, the flow channel part is provided with an upper flow channel fixing plate and a lower flow channel fixing plate for fixing the test; the four through holes on the upper flow channel fixing plate and the lower flow channel fixing plate correspond to the four threaded holes on the platform in the middle cylinder body, and the four through holes are used for assembling the upper flow channel fixing plate and the lower flow channel fixing plate on the platform in the middle cylinder body.
Furthermore, after the upper flow channel fixing plate and the lower flow channel fixing plate are assembled, the gap for placing the flow channel plate is slightly smaller than the thickness of the flow channel plate, the freedom degree of the flow channel plate is limited through interference fit, and the flow channel plate is prevented from being dislocated in the testing process.
Furthermore, two sensor mounting hole sites are arranged on the middle cylinder body and used for assembling the hydraulic sensor; according to the structural characteristic that the hydraulic sensor is provided with threads, the two hole sites are provided with threads matched with the sensor; the depth of the thread in the mounting hole ensures that the sensor probe does not completely extend into the liquid cavity, so that mechanical interference is prevented; the sensor mounting holes are arranged at the inlet and the outlet of the flow channel, and the two sensors respectively collect hydraulic data of the inlet and the outlet of the flow channel and transmit the hydraulic data to the system.
The invention aims to provide a device capable of independently testing the dynamic characteristics of a liquid resistance suspension flow channel, so that fluid resistance and liquid inductance parameters obtained by matching different flow channels with damping liquid are obtained, and the dynamic characteristics of the liquid resistance suspension can be conveniently predicted by a lumped parameter model. Can be based on:
Figure BDA0002388428660000031
fourier transformation is carried out on two sides of the formula to convert the time domain expression into a frequency domain to obtain
jωIiqi(jω)+Riqi(jω)＝Δp(jω) (16)
And then can obtain
Figure BDA0002388428660000032
Figure BDA0002388428660000041
To obtain the liquid resistance and the liquid feeling of the damping liquid in the flow channel under different frequencies, the flow channel part is taken separately in the practical analysis, the damping liquid is loaded with the hydraulic pressure at the inlet of the flow channel, and the expression is
Pi(t)＝∑ansin2nπt (Pa) (19)
The load represented by the above formula comprises a time-domain sine function of a plurality of frequencies. Corresponding to the volume flow q of the damping fluid through any cross section in the analysis resultiThe change of the frequency in the frequency domain is also considered with emphasis.
Compared with the prior art, the invention has the advantages that: in the process of the prior development of the liquid resistance suspension, a developer can select a flow channel part as an independent module, the liquid sensing and liquid resistance parameters of the flow channel are identified through the test method, and the liquid sensing and liquid resistance parameters are substituted into a liquid resistance suspension lumped parameter model, so that the liquid resistance suspension performance can be effectively predicted, and the possibility is provided for realizing the modularized design of the liquid resistance suspension.
Drawings
FIG. 1 is a liquid resistance suspension lumped parameter model;
FIG. 2 is a functional block diagram;
FIG. 3 is an assembly view of the liquid resistance suspension flow channel testing tool;
FIG. 4 is a schematic view of an internal fluid chamber of the hydraulic resistance suspension flow channel testing tool;
FIG. 5 is a schematic view of the piston structure;
FIG. 6 is a schematic view of the structure of the intermediate cylinder;
FIG. 7 is a schematic view of a flow channel fixing plate;
FIG. 8 is a schematic view of a rubber cup structure;
reference numerals: 1-liquid inlet sealing rod; 2-a piston; 3-a hydraulic cylinder body; 4-intermediate cylinder; 5-upper flow channel fixing plate; 6-lower runner fixing plate; 7-a leather cup; 8-a base; 9-a hydraulic cylinder; 10-upper fluid chamber; 11-a flow channel; 12-lower liquid chamber.
Detailed Description
The following describes a hydraulic resistance suspension flow channel testing tool in detail according to the accompanying drawings and the detailed description.
A liquid resistance suspension flow channel test tool can be used for measuring liquid inductance and liquid resistance parameters of a liquid resistance suspension flow channel. In the installation process, the upper piston is connected with a vibration starting device used for testing and moves along with the moving head, the lower base is connected to the ground or the upper part of a machine body platform of the test bench through bolts, the upper liquid chamber and the lower liquid chamber in the middle are respectively provided with a hydraulic sensor for monitoring the pressure change of the internal damping liquid, and the obtained data is correspondingly processed through a computer to obtain the channel liquid sensing and liquid resistance parameters under the frequency domain.
A hydraulic resistance suspension flow channel test tool is composed of a liquid inlet sealing rod 1, a piston 2, an upper hydraulic cylinder body 3, a middle cylinder body 4, a leather cup 7 and a base 8; the piston 2 is assembled in the upper hydraulic cylinder body 3, and the piston rod extends out of a small hole in the top of the upper hydraulic cylinder body 3; the liquid inlet sealing rod 1 is used for sealing a liquid cavity after liquid is filled in the device, is matched with the piston rod through pipe threads, and the head of the liquid inlet sealing rod is matched with an actuator used for testing to achieve the effect of load transfer; the outer ring of the upper hydraulic cylinder body 3 is provided with pipe threads which are matched with pipe threads on the inner wall surface of the upper part of the middle cylinder body 4 to seal a liquid cavity; the outer circle of groove at the bottom of the middle cylinder body 4 is matched with the rubber cup 7, and the rubber cup 7 is fixed on the rubber cup 7 through vulcanization; the outer ring of the lower part of the middle cylinder body 4 is provided with threads which are matched with the threads of the inner wall surface of the upper part of the base 8; the base is provided with two bolt hole sites, and the whole set of tool is fixed on the test bench through bolts. The hydraulic cylinder 9 consists of an upper hydraulic cylinder body 3 and a middle cylinder body 4, the upper hydraulic cylinder body 3 is positioned above the middle cylinder body 4, a liquid chamber is arranged inside the hydraulic cylinder 9, and the liquid chamber consists of an upper liquid chamber 10, a flow channel 11 and a lower liquid chamber 12 from top to bottom; the hydraulic cylinder comprises a liquid inlet sealing rod 1, a piston 2 and a hydraulic cylinder body and is used for transmitting load generated by a testing device actuator; the upper liquid chamber 10 and the lower liquid chamber 12 are independent from each other, and are communicated through flow passages to exchange liquid. The top end of the piston rod is provided with a through hole for filling damping liquid into the liquid cavity before the test starts and sucking the damping liquid in the liquid cavity out of the liquid cavity after the test is finished. The runner part is provided with an upper runner fixing plate 5 and a lower runner fixing plate 6 for fixing a test; the four through holes on the upper flow channel fixing plate 5 and the lower flow channel fixing plate 6 correspond to the four threaded holes on the platform inside the middle cylinder 4, and are used for assembling the upper flow channel fixing plate 5 and the lower flow channel fixing plate 6 on the platform inside the middle cylinder 4. After the upper flow channel fixing plate 5 and the lower flow channel fixing plate 6 are assembled, the gap for placing the flow channel plate is slightly smaller than the thickness of the flow channel plate, the freedom degree of the flow channel plate is limited through interference fit, and the flow channel plate is prevented from being dislocated in the testing process. Two sensor mounting hole sites for assembling hydraulic sensors are arranged on the middle cylinder body 4; according to the structural characteristic that the hydraulic sensor is provided with threads, the two hole sites are provided with threads matched with the sensor; the depth of the thread in the mounting hole ensures that the sensor probe does not completely extend into the liquid cavity, so that mechanical interference is prevented; the sensor mounting holes are arranged at the inlet and the outlet of the flow channel, and the two sensors respectively collect hydraulic data of the inlet and the outlet of the flow channel and transmit the hydraulic data to the system.
In the embodiment, the piston rod is provided with a through hole which is directly communicated with the upper liquid chamber and is used for injecting and discharging damping liquid. After the assembly of the tool is completed, damping liquid can be directly injected into the liquid chamber from the liquid inlet through the liquid injection equipment, and whether the upper liquid chamber and the lower liquid chamber are filled with the liquid is judged by monitoring the liquid pressure in the liquid chamber. After the test is finished, the suction device is used for sucking out the damping liquid in the upper liquid chamber through the liquid inlet, and meanwhile, whether the upper cylinder body can be disassembled to further suck out the damping liquid in the lower liquid chamber and the flow channel is judged by monitoring the pressure change in the upper liquid chamber (whether the pressure in the upper liquid chamber is equal to the atmospheric pressure or not).
And sealing the liquid inlet by using a liquid inlet sealing rod after liquid injection is finished. The sealing rod is provided with pipe threads, and the pipe threads are matched with the pipe threads in the through hole of the piston rod to seal the liquid chamber. The seal rod head is connected to and receives a vibrational load from the vibration-initiating device.
The outer wall surface of the upper hydraulic cylinder body is provided with pipe threads which are matched with the pipe threads on the inner wall surface of the middle cylinder body, and the inner wall surfaces of the upper hydraulic cylinder body and the middle cylinder body can form the wall surface of an upper liquid chamber. The cylinder body of the hydraulic cylinder is provided with a through hole to ensure that the piston rod passes through the through hole to move up and down.
Two flow passage fixing plates are arranged in the liquid chamber and are used for fixing the flow passage plates of the liquid resistance suspension. The cross section is the ring in the horizontal plane of two fixed plates, and the interior circle diameter of ring slightly is less than runner plate excircle diameter, and is greater than the diameter of its runner export and entry outside border place circle, can guarantee like this that liquid business turn over in the runner can not be hindered when two fixed plates effectively fix the runner plate. The two fixed plates are matched with each other, a cylindrical space is formed in the fixed plates and used for placing the runner plate, a gap between the two fixed plates is slightly smaller than the thickness of the runner plate, six degrees of freedom of the runner plate can be effectively limited through interference fit, and particularly, the runner plate is kept unchanged in position of a runner inlet and an outlet in order to avoid the situation that the runner plate rotates around a z axis in the test process. The two fixing plates are respectively provided with four bolt through holes which can be matched with four bolt holes on the platform in the middle cylinder body and are fixed on the middle cylinder body through bolt connection.
The middle cylinder body and the upper hydraulic cylinder body are matched through pipe threads to form an upper liquid chamber, and the leather cup is vulcanized at the lower part of the upper liquid chamber to form a lower liquid chamber. The inner wall surface of the upper part is provided with pipe threads which are matched with the cylinder body of the hydraulic cylinder, and the outer wall surface of the lower part is provided with pipe threads which are matched with the base.
The leather cup is made of rubber materials, is vulcanized with the bottom of the middle cylinder body and is fixed on the cylinder body, and is used for adapting to the volume change of liquid in the lower liquid chamber.
Before testing, all parts of the tool are assembled and put into a runner plate to be tested for fixing, and a hydraulic sensor is assembled in each of the upper mounting hole and the lower mounting hole of the middle cylinder body. And after the liquid cavity is completely sealed, damping liquid is injected from the liquid inlet, and the pressure in the liquid cavity is monitored. After the liquid injection is finished, a liquid inlet sealing rod is screwed into the liquid inlet to seal the liquid inlet. The base is fixed on the test bed through bolt connection, and the head of the upper liquid inlet sealing rod is connected with the actuator. In the test process, the load of the liquid inlet sealing rod generated by the actuator directly acts on the piston, the liquid in the liquid cavity is extruded by the piston to force the liquid to flow back and forth in the upper liquid chamber and the lower liquid chamber, and the hydraulic sensors at the liquid inlet and the liquid outlet record hydraulic change data at two positions and transmit the data to the system for further calculation. Because the area of the piston in the hydraulic cylinder is constant, the liquid flow can be obtained by the product of the up-and-down movement displacement of the piston and the area of the piston, and the displacement value can be recorded in a system of the actuator through a displacement sensor. According to the acquired flow and the liquid pressure difference between the liquid inlet and the liquid outlet, the liquid feeling and the liquid resistance of the flow channel in the frequency domain can be obtained through calculation.
The above embodiments are the best mode for carrying out the invention, but the specific embodiments of the invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, simplifications, etc., which do not depart from the spirit and principle of the invention, should be regarded as equivalent substitutions, and are included in the scope of the invention.

Claims (6)

1. The utility model provides a liquid hinders suspension runner test fixture which characterized in that: consists of a liquid inlet sealing rod (1), a piston (2), an upper hydraulic cylinder body (3), a middle cylinder body (4), a leather cup (7) and a base (8);
the piston (2) is assembled in the upper hydraulic cylinder body (3), and the piston rod extends out of a small hole in the top of the upper hydraulic cylinder body (3); the liquid inlet sealing rod (1) is used for sealing a liquid cavity after liquid is filled in the device, is matched with the piston rod through a pipe thread, and the head of the liquid inlet sealing rod is matched with an actuator used for testing to achieve the effect of load transfer;
the outer ring of the upper hydraulic cylinder body (3) is provided with pipe threads which are matched with pipe threads on the inner wall surface of the upper part of the middle cylinder body (4) to seal a liquid cavity;
a circle of groove outside the bottom of the middle cylinder body (4) is matched with the rubber cup (7), and the rubber cup (7) is fixed on the rubber cup through vulcanization; the outer ring of the lower part of the middle cylinder body (4) is provided with threads which are matched with the threads of the inner wall surface of the upper part of the base (8);
the base is provided with two bolt hole sites, and the whole set of tool is fixed on the test bench through bolts.
2. The hydraulic resistance suspension flow channel test tool according to claim 1, characterized in that: the hydraulic cylinder (9) consists of an upper hydraulic cylinder body (3) and a middle cylinder body (4), the upper hydraulic cylinder body (3) is positioned above the middle cylinder body (4), a liquid chamber is arranged inside the hydraulic cylinder (9), and the liquid chamber consists of an upper liquid chamber (10), a flow channel (11) and a lower liquid chamber (12) from top to bottom;
the hydraulic cylinder comprises a liquid inlet sealing rod (1), a piston (2) and a hydraulic cylinder body and is used for transmitting load generated by a testing device actuator;
the upper liquid chamber (10) and the lower liquid chamber (12) are independent respectively, and are communicated through a flow passage to exchange liquid.
3. The hydraulic resistance suspension flow channel test tool according to claim 2, characterized in that: the top end of the piston rod is provided with a through hole for filling damping liquid into the liquid cavity before the test starts and sucking the damping liquid in the liquid cavity out of the liquid cavity after the test is finished.
4. The hydraulic resistance suspension flow channel test tool according to claim 3, characterized in that: the runner part is provided with an upper runner fixing plate (5) and a lower runner fixing plate (6) for fixing a test; the four through holes on the upper flow channel fixing plate (5) and the lower flow channel fixing plate (6) correspond to the four threaded holes on the inner platform of the middle cylinder body (4) and are used for assembling the upper flow channel fixing plate (5) and the lower flow channel fixing plate (6) on the inner platform of the middle cylinder body (4).
5. The hydraulic resistance suspension flow channel test tool according to claim 4, characterized in that: after the upper flow channel fixing plate (5) and the lower flow channel fixing plate (6) are assembled, the gap for placing the flow channel plate is slightly smaller than the thickness of the flow channel plate, the freedom degree of the flow channel plate is limited through interference fit, and the flow channel plate is prevented from being dislocated in the test process.
6. The hydraulic resistance suspension flow channel test tool according to claim 5, characterized in that: two sensor mounting hole sites for assembling hydraulic sensors are arranged on the middle cylinder body (4); according to the structural characteristic that the hydraulic sensor is provided with threads, the two hole sites are provided with threads matched with the sensor; the depth of the thread in the mounting hole ensures that the sensor probe does not completely extend into the liquid cavity, so that mechanical interference is prevented; the sensor mounting holes are arranged at the inlet and the outlet of the flow channel, and the two sensors respectively collect hydraulic data of the inlet and the outlet of the flow channel and transmit the hydraulic data to the system.
CN202010106924.5A 2020-02-20 2020-02-20 Liquid resistance suspension runner test tool Pending CN111365401A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020096392A (en) * 2001-06-19 2002-12-31 일 영 이 Suspension Simulator
CN203772527U (en) * 2013-11-28 2014-08-13 同济大学 Engine rubber mount dynamic stiffness testing device
CN106932181A (en) * 2016-12-08 2017-07-07 同济大学 A kind of dynamic assembly suspension parameter identification experimental provision
CN107478419A (en) * 2017-07-13 2017-12-15 江苏科技大学 A kind of pulsation dampening performance testing device and method of testing
CN109916641A (en) * 2019-03-29 2019-06-21 华南理工大学 A kind of active engine mount performance testing device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020096392A (en) * 2001-06-19 2002-12-31 일 영 이 Suspension Simulator
CN203772527U (en) * 2013-11-28 2014-08-13 同济大学 Engine rubber mount dynamic stiffness testing device
CN106932181A (en) * 2016-12-08 2017-07-07 同济大学 A kind of dynamic assembly suspension parameter identification experimental provision
CN107478419A (en) * 2017-07-13 2017-12-15 江苏科技大学 A kind of pulsation dampening performance testing device and method of testing
CN109916641A (en) * 2019-03-29 2019-06-21 华南理工大学 A kind of active engine mount performance testing device

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