CN108844737A - Screw element Fatigue Testing Loads loading device - Google Patents
Screw element Fatigue Testing Loads loading device Download PDFInfo
- Publication number
- CN108844737A CN108844737A CN201810796263.6A CN201810796263A CN108844737A CN 108844737 A CN108844737 A CN 108844737A CN 201810796263 A CN201810796263 A CN 201810796263A CN 108844737 A CN108844737 A CN 108844737A
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- CN
- China
- Prior art keywords
- screw element
- loading device
- fatigue testing
- crossbeam
- loads loading
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Classifications
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- 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
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/021—Gearings
-
- 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
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention belongs to the technical fields such as the fatigue test of gear, and in particular to a kind of screw element Fatigue Testing Loads loading device.The screw element Fatigue Testing Loads loading device, including pedestal, electromagnetic exciting device, testing stand, upper grip, lower collet, connecting rod, crossbeam, the electromagnetic exciting device is set on the pedestal, the testing stand is arranged in the top of the electromagnetic exciting device, the lower collet is fixed on the testing stand, the upper grip, the lower collet aperture position be equipped with threaded hole, the both ends of the screw element are separately fixed in the threaded hole of upper grip and the lower collet, and the upper grip is connected to the crossbeam by connecting rod.
Description
Technical field
The invention belongs to the technical fields such as the fatigue test of gear, and in particular to a kind of screw element Fatigue Testing Loads load
Device.
Background technique
It is continuous to the experiment and detection means of engineering goods with the development of mechanical industry and the continuous improvement of scientific research level
More stringent requirements are proposed.
In design of gears, especially for relatively high gear is required in terms of reliability, according to reliability theory pair
The result for the assessment that safety coefficient carries out can not almost reflect the reliability level of gear.It is thus typically necessary to gear
Fatigue test is carried out, to examine the reliability and durability of gear, especially.
The fatigue test of gear, metal material and its component needs to measure gear, metal material and its component and is drawing, pressing
Or the fatigue properties under tension and compression alternating load, fracture mechanics, the test and detection of crack growth rate etc..It is being equipped with corresponding folder
When tool, fixture is able to carry out gear life test, bar samples drawingand pressing fatigue, plate tensile sample drawingand pressing fatigue, 3 points/four-point bending
Fatigue.
Therefore, the load that dynamic load how is carried out to screw element, becomes those skilled in the art's technology urgently to be resolved
Problem.
Summary of the invention
The present invention is directed at least solve the technical problems existing in the prior art, a kind of screw element fatigue test load is proposed
Lotus loading device can improve the problem of the existing technology.
A kind of screw element Fatigue Testing Loads loading device, including pedestal, electricity are provided to achieve the purpose of the present invention
Magnetic exciting device, testing stand, upper grip, lower collet, connecting rod, crossbeam, the electromagnetic exciting device are set on the pedestal,
The testing stand is arranged in the top of the electromagnetic exciting device, is fixed with the lower collet on the testing stand, the upper grip,
The aperture position of the lower collet is equipped with threaded hole, and the both ends of the screw element are separately fixed at upper grip and the lower collet
Threaded hole in, the upper grip is connected to the crossbeam by connecting rod.
Preferably, the electromagnetic exciting device includes turbine box, Balance Iron, electromagnet, and the turbine box is set to described
On pedestal, the upper end of the turbine box connects the Balance Iron, and the turbine box is used to adjust the height of the Balance Iron, described
The upper end of Balance Iron is provided with the electromagnet, and the top of the electromagnet is arranged the testing stand, the testing stand with it is described
Magnetic gap regulating device is equipped between electromagnet.
Preferably, ball screw, stepper motor are provided in the turbine box；The lower end of the ball screw connects turbine
Case, upper end connect the Balance Iron, and the stepper motor drives the ball screw stretching motion with the height of adjustment iron.
Preferably, the junction of the stepper motor and the ball screw is equipped with lubricating cup.
Preferably, heel post is equipped between the crossbeam and the pedestal, the heel post is used to support the crossbeam.
Preferably, the heel post is equipped with button box, and the button box is for receiving manual control signal, to control
State stepper motor movement.
Preferably, force snesor is equipped between the connecting rod and the crossbeam.
Preferably, the pedestal is fixed on the basis of cement floor by pedestal spring.
The invention has the advantages that：
Screw element Fatigue Testing Loads loading device provided by the invention is based on electromagentic resonance by load driving, leads to
It crosses dynamic load to be superimposed upon on static load, applies stress to screw element, dynamic load makes screw element have fixed frequency, damage
Energy consumption is very small, opens vibration and is easy, and electrification systems may be implemented and search resonance point automatically without any adjustment；Test load nothing
Abrasion, plant maintenance are simple；The frequency of load is high, and the test period is short, and test period is greatly saved.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the screw element Fatigue Testing Loads loading device that embodiment of the present invention provides；
Fig. 2 is the vibration working principle diagram of screw element Fatigue Testing Loads loading device in Fig. 1.
Wherein, description of symbols：
Pedestal spring 1, pedestal 2, turbine box 3, ball screw 4, travel switch 5, guide post 6, stepper motor 7, lubricating cup 8,
Nut 9, Balance Iron 10, electromagnet 11, button box 12, weight tray 13, frequency modulation counterweight 14, screw 15, turbine 16, worm screw 17,
Testing stand 18, lower collet 19, screw element 20, upper grip 21, connecting rod 22, force snesor 23, crossbeam 24, big semielliptic spring 25.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
Fig. 1-Fig. 2 is please referred to, Fig. 1 is the knot for the screw element Fatigue Testing Loads loading device that embodiment of the present invention provides
Structure schematic diagram；Fig. 2 is the vibration working principle diagram of screw element Fatigue Testing Loads loading device in Fig. 1.
As Figure 1-Figure 2, it includes pedestal 2, electromagnetism that the present invention, which provides a kind of screw element Fatigue Testing Loads loading device,
Exciting device, testing stand 18, lower collet 19, upper grip 21, connecting rod 22, crossbeam 24, the electromagnetic exciting device are set to institute
It states on pedestal 2, the testing stand 18 is arranged in the top of the electromagnetic exciting device, is fixed with the lower folder on the testing stand 18
First 19, the upper grip 21, the lower collet 19 aperture position be equipped with threaded hole, the both ends of the screw element 20 are solid respectively
It is scheduled in the threaded hole of upper grip 21 and the lower collet 19, the upper grip 21 is connected to the crossbeam by connecting rod 22
24。
Screw element Fatigue Testing Loads loading device provided by the invention, load driving are based on electromagentic resonance, pass through dynamic
Load is superimposed upon on static load, applies stress to screw element 20, dynamic load makes screw element 20 have fixed frequency, loss
Energy is very small, opens vibration and is easy, and electrification systems may be implemented and search resonance point automatically without any adjustment；Test load is without mill
Damage, plant maintenance are simple；The frequency of load is high, and the test period is short, and test period is greatly saved.
In preferred scheme, the electromagnetic exciting device includes turbine box 3, Balance Iron 10, electromagnet 11, the turbine
Case 3 is set on the pedestal 2, and the upper end of the turbine box 3 connects the Balance Iron 10, and the turbine box 3 is for adjusting institute
The height of Balance Iron 10 is stated, the upper end of the Balance Iron 10 is provided with the electromagnet 11, the top setting of the electromagnet 11
The testing stand 18 is equipped with magnetic gap regulating device, consolidates on the testing stand 18 between the testing stand 18 and the electromagnet 11
Surely there is the lower collet 19.
As shown in Fig. 2, screw element Fatigue Testing Loads loading device provided by the invention is loaded using non-contacting load
Mode, directly using electromagnetic force as exciting force, wherein susceptor mass m1, prevailing quality m2, exciting quality m3, additional mass
(14 mass of frequency modulation counterweight) m4, support spring, K1, main vibration spring K2, screw element K3, exciting vibrating spring K4.
In preferred scheme, ball screw 4, stepper motor 7 are provided in the turbine box 3；Under the ball screw 4
End connection turbine box 3, upper end connect the Balance Iron 10, the stepper motor 7 drive 4 stretching motion of ball screw with
The height of adjustment iron 10.Ball screw 4 is driven to carry out stretching motion by stepper motor 7, with the height of adjustment iron 10
Degree, may be implemented the stepless speed regulation of 10 height of Balance Iron.
In specific scheme, the upper end of ball screw 4 is set with nut 9, by the adjustable nut 9 of special spanner with
Gap between ball screw 4.
In preferred scheme, the junction of the stepper motor 7 and the ball screw 4 is equipped with lubricating cup 8, passes through lubricating cup 8
Lubricating oil can be added to ball screw 4, ball screw 4 is lubricated.
It further include the frequency modulation counterweight 14 for adjusting resonant frequency, the frequency modulation counterweight 14 is symmetrically set in preferred scheme
In the two sides of the electromagnet 11.Frequency modulation counterweight 14 is asymmetrical load, and frequency modulation counterweight 14 is connected to examination by big semielliptic spring 25
It tests on the main screw rod between platform 18 and electromagnet 11, excitation system is constituted by frequency modulation counterweight 14 and big semielliptic spring 25, by changing
The quantity of modified tone frequency counterweight 14 can change running frequency.
In preferred scheme, the lower section of the frequency modulation counterweight 14 is equipped with the counterweight support for being used to support extra frequency modulation counterweight 14
Disk 13.Extra frequency modulation counterweight 14 can be placed on weight tray 13.
It further include the screw 15 for passing through the frequency modulation counterweight 14 in preferred scheme.For the ease of placing frequency modulation weight
Code 14, frequency modulation counterweight 14 can pass through the screw 15, and the screw of different length can be selected according to the quantity of frequency modulation counterweight 14
15。
In preferred scheme, the magnetic gap regulating device includes turbine 16 and worm screw 17, the turbine 16 and the worm screw
17 engagements, the main screw rod between the 16 joint test platform 18 of turbine and electromagnet 11 can rotate snail by special handle
Bar 17, and then pass through the length that revolving wormgear 16 adjusts main screw rod, to adjust magnetic air gap.
In preferred scheme, heel post is equipped between the crossbeam 24 and the pedestal 2, the heel post is used to support institute
State crossbeam 24.
In further embodiment, the predeterminated position of the heel post is equipped with close to switch, and the close switch is for detecting
Whether the testing stand 18 arrives at predeterminated position, if the testing stand 18 arrives at predeterminated position, controls and reduces the electromagnet
Supply current described in 11 supply current or terminal.Mechanical position limitation protection may be implemented or load occur more than full scale
When the abnormal conditions such as 110% or over-and under-voltage, overcurrent, communication mistake, to realize mandatory protection.
In preferred scheme, the heel post is equipped with button box 12, and the button box 12 manually controls letter for receiving
Number, it is acted with controlling the stepper motor 7.
In preferred scheme, it is equipped with force snesor 23 between the connecting rod 22 and the crossbeam 24, passes through force snesor
23 can detecte the pulling force or pressure that the screw element 20 is born.
In preferred scheme, the pedestal 2 is fixed on the basis of cement floor by 2 spring 1 of pedestal.
It is located at 3 two sides of turbine box in preferred scheme, on the pedestal 2 and is equipped with guide post 6, the turbine box 3
Two sides are bonded with the guide post 6, and the turbine box 3 moves up and down along the guide post 6.Guide post 6 plays guiding and limit
Effect.
Structure, feature and effect of the invention, the above institute are described in detail based on the embodiments shown in the drawings
Only presently preferred embodiments of the present invention is stated, but the present invention does not limit the scope of implementation as shown in the drawings, it is all according to structure of the invention
Think made change or equivalent example modified to equivalent change, when not going beyond the spirit of the description and the drawings,
It should all be within the scope of the present invention.
Claims (8)
1. a kind of screw element Fatigue Testing Loads loading device, which is characterized in that including pedestal, electromagnetic exciting device, testing stand,
Upper grip, lower collet, connecting rod, crossbeam, the electromagnetic exciting device are set on the pedestal, the electromagnetic exciting device
The testing stand is arranged in top, is fixed with the lower collet, the opening position of the upper grip, the lower collet on the testing stand
Set and be equipped with threaded hole, the both ends of the screw element are separately fixed in the threaded hole of upper grip and the lower collet, it is described on
Collet is connected to the crossbeam by connecting rod.
2. screw element Fatigue Testing Loads loading device according to claim 1, which is characterized in that the electromagnetic exciting dress
It sets including turbine box, Balance Iron, electromagnet, the turbine box is set on the pedestal, and the upper end of the turbine box connects institute
Balance Iron is stated, the turbine box is used to adjust the height of the Balance Iron, and the upper end of the Balance Iron is provided with the electromagnet,
The testing stand is arranged in the top of the electromagnet, and magnetic gap regulating device is equipped between the testing stand and the electromagnet.
3. screw element Fatigue Testing Loads loading device according to claim 1, which is characterized in that set in the turbine box
It is equipped with ball screw, stepper motor；The lower end of the ball screw connects turbine box, and upper end connects the Balance Iron, the step
Into ball screw stretching motion described in motor driven with the height of adjustment iron.
4. screw element Fatigue Testing Loads loading device according to claim 3, which is characterized in that the stepper motor with
The junction of the ball screw is equipped with lubricating cup.
5. screw element Fatigue Testing Loads loading device according to claim 1 or 2, which is characterized in that the crossbeam with
Heel post is equipped between the pedestal, the heel post is used to support the crossbeam.
6. screw element Fatigue Testing Loads loading device according to claim 5, which is characterized in that set on the heel post
There is button box, the button box is for receiving manual control signal, to control the stepper motor movement.
7. screw element Fatigue Testing Loads loading device according to claim 1, which is characterized in that the connecting rod and institute
It states and is equipped with force snesor between crossbeam.
8. screw element Fatigue Testing Loads loading device according to claim 1, which is characterized in that the pedestal passes through bottom
Seat spring is fixed on the basis of cement floor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810796263.6A CN108844737A (en) | 2018-07-19 | 2018-07-19 | Screw element Fatigue Testing Loads loading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810796263.6A CN108844737A (en) | 2018-07-19 | 2018-07-19 | Screw element Fatigue Testing Loads loading device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108844737A true CN108844737A (en) | 2018-11-20 |
Family
ID=64196550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810796263.6A Pending CN108844737A (en) | 2018-07-19 | 2018-07-19 | Screw element Fatigue Testing Loads loading device |
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| Country | Link |
|---|---|
| CN (1) | CN108844737A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011038817A (en) * | 2009-08-07 | 2011-02-24 | Railway Technical Res Inst | Frequency variable fatigue testing device using electrically operated vibration generator |
| CN104034616A (en) * | 2014-05-29 | 2014-09-10 | 河海大学 | Electromagnetic type stay cable fatigue tester |
| CN104777054A (en) * | 2015-05-18 | 2015-07-15 | 浙江工业大学 | Method for identifying parameters of resonant fatigue crack propagation test vibration system based on soft sensing technology |
| CN105004620A (en) * | 2015-07-16 | 2015-10-28 | 浙江工业大学 | High-frequency fatigue testing machine dynamic load error compensation method |
| CN206725368U (en) * | 2017-05-16 | 2017-12-08 | 吉林大学 | A kind of high-frequency electrical magnetic-type vibrator |
-
2018
- 2018-07-19 CN CN201810796263.6A patent/CN108844737A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011038817A (en) * | 2009-08-07 | 2011-02-24 | Railway Technical Res Inst | Frequency variable fatigue testing device using electrically operated vibration generator |
| CN104034616A (en) * | 2014-05-29 | 2014-09-10 | 河海大学 | Electromagnetic type stay cable fatigue tester |
| CN104777054A (en) * | 2015-05-18 | 2015-07-15 | 浙江工业大学 | Method for identifying parameters of resonant fatigue crack propagation test vibration system based on soft sensing technology |
| CN105004620A (en) * | 2015-07-16 | 2015-10-28 | 浙江工业大学 | High-frequency fatigue testing machine dynamic load error compensation method |
| CN206725368U (en) * | 2017-05-16 | 2017-12-08 | 吉林大学 | A kind of high-frequency electrical magnetic-type vibrator |
Non-Patent Citations (2)
| Title |
|---|
| 米亦农: "国外高频疲劳试验机的发展状况", 《材料试验机》 * |
| 郝岷: "《自动化生产线设备维修》", 31 August 2011 * |
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Application publication date: 20181120 |