CN108956133B - Gear axial fatigue strength experiment load loading device - Google Patents
Gear axial fatigue strength experiment load loading device Download PDFInfo
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- CN108956133B CN108956133B CN201810871318.5A CN201810871318A CN108956133B CN 108956133 B CN108956133 B CN 108956133B CN 201810871318 A CN201810871318 A CN 201810871318A CN 108956133 B CN108956133 B CN 108956133B
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- 238000002474 experimental method Methods 0.000 title claims abstract description 13
- 238000012360 testing method Methods 0.000 claims abstract description 9
- 238000009661 fatigue test Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 100
- 239000012535 impurity Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention belongs to the technical field of fatigue tests of gears and the like, and particularly relates to a load loading device for an axial fatigue strength test of a gear. The gear axial fatigue strength experiment load loading device comprises a gear fixing base, an oil tank, a hydraulic pump, a motor, a first electromagnetic directional valve, a second electromagnetic directional valve, a first pressure release valve, a second pressure release valve, a first hydraulic cylinder and a second hydraulic cylinder, wherein the gear fixing base is used for fixing the tooth surface of a measured gear. The invention provides a gear axial fatigue strength experiment load loading device, which fixes a gear to be tested on a fixed base, fixes the radial direction to be tested so as to prevent the gear to be tested from moving in the radial direction, and is characterized in that two hydraulic cylinders are respectively arranged at two sides of the gear to be tested, and simultaneously applies axial load to the axial direction of the gear to be tested, so that the axial fatigue strength of the gear can be tested.
Description
Technical Field
The invention belongs to the technical field of fatigue tests of gears and the like, and particularly relates to a load loading device for an axial fatigue strength test of a gear.
Background
In gear design, particularly for gears with relatively high requirements in terms of reliability, the results of the evaluation of the safety factor according to the reliability theory almost completely fail to reflect the reliability level of the gear. Therefore, fatigue testing of gears is often required to verify the reliability and durability of the gears, especially.
The axial fatigue characteristic of the gear is an important performance of the gear, the axial fatigue characteristic of the gear is valued by more and more gear designers, and an effective method for carrying out a simulation experiment on the axial fatigue special effect of the gear, particularly how to carry out load loading on the axial direction of the gear, does not exist at present.
Therefore, how to load the axial direction of the gear becomes a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to at least solve the technical problems in the prior art, and provides a loading device for an axial fatigue strength test load of a gear, which can improve the problems in the prior art.
The invention provides a gear axial fatigue strength experiment load loading device for achieving the purpose of the invention, which comprises a gear fixing base, an oil tank, a hydraulic pump, a motor, a first electromagnetic directional valve, a second electromagnetic directional valve, a first pressure release valve, a second pressure release valve, a first hydraulic cylinder and a second hydraulic cylinder, wherein the gear fixing base is used for fixing the tooth surface of a measured gear, the oil tank is respectively communicated with an oil outlet pipeline and an oil return pipeline, the hydraulic pump is driven by the motor, the hydraulic pump is arranged on the oil outlet pipeline, an oil inlet of the hydraulic pump is communicated with the oil tank, an oil outlet of the hydraulic pump is respectively communicated with oil inlets of the first electromagnetic directional valve and the second electromagnetic directional valve, an oil outlet of the first electromagnetic directional valve is respectively communicated with a rod cavity and a rodless cavity of the first hydraulic cylinder, an oil outlet of the second electromagnetic directional valve is respectively communicated with a rod cavity and a rodless cavity of the second hydraulic cylinder, the oil outlet of the first hydraulic cylinder is communicated with the oil return pipeline through a first pressure relief valve, and the oil outlet of the second hydraulic cylinder is communicated with the oil return pipeline through a second pressure relief valve; and the power output end of the first hydraulic cylinder and the power output end of the second hydraulic cylinder are respectively positioned at two sides of the axis of the gear to be measured.
Preferably, an oil outlet pipeline at the oil outlet of the hydraulic pump is provided with a one-way valve, and the oil outlet of the hydraulic pump is communicated with an oil inlet of the one-way valve.
Preferably, an oil filter is arranged on an oil outlet pipeline between the one-way valve and the first electromagnetic directional valve and between the one-way valve and the second electromagnetic directional valve.
Preferably, the oil filter is an oil filter having a bypass valve.
Preferably, the oil filter is a high-pressure oil filter.
Preferably, the oil return device further comprises an overflow valve, an oil outlet of the check valve is communicated with an oil inlet of the overflow valve, and an oil outlet of the overflow valve is communicated with the oil return pipeline.
Preferably, still be equipped with the manometer that is used for detecting oil pressure on the oil outlet pipeline.
Preferably, an oil filter is arranged on the oil return pipeline, and an oil outlet of the oil filter is communicated with an oil tank.
Preferably, the oil filter is an oil filter having a bypass valve.
The invention has the following beneficial effects:
the invention provides a gear axial fatigue strength experiment load loading device, which fixes a gear to be tested on a fixed base, fixes the radial direction to be tested so as to prevent the gear to be tested from moving in the radial direction, and is characterized in that two hydraulic cylinders are respectively arranged at two sides of the gear to be tested, and simultaneously applies axial load to the axial direction of the gear to be tested, so that the axial fatigue strength of the gear can be tested.
Drawings
FIG. 1 is a schematic structural diagram of a load loading device for a gear axial fatigue strength test, provided by an embodiment of the invention;
description of reference numerals:
the hydraulic control system comprises a hydraulic pump 1, a motor 2, a first electromagnetic directional valve 3, a second electromagnetic directional valve 4, a first pressure release valve 5, a second pressure release valve 6, a first hydraulic cylinder 7, a second hydraulic cylinder 8, an oil filter 9, an overflow valve 10, an oil filter 11, a one-way valve 12 and a pressure gauge 13.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a load loading device for a gear axial fatigue strength experiment according to an embodiment of the present invention.
As shown in fig. 1, the load loading device for the axial fatigue strength experiment of the gear provided by the invention comprises a gear fixing base, an oil tank, a hydraulic pump 1, a motor 2, a first electromagnetic directional valve 3, a second electromagnetic directional valve 4, a first pressure release valve 5, a second pressure release valve 6, a first hydraulic cylinder 7 and a second hydraulic cylinder 8, wherein the gear fixing base is used for fixing the tooth surface of the gear to be measured.
The oil tank is respectively communicated with an oil outlet pipeline and an oil return pipeline, the hydraulic pump 1 is driven by the motor 2, the hydraulic pump 1 is arranged on the oil outlet pipeline, an oil inlet of the hydraulic pump 1 is communicated with the oil tank, an oil outlet of the hydraulic pump 1 is respectively communicated with oil inlets of the first electromagnetic directional valve 3 and the second electromagnetic directional valve 4, an oil outlet of the first electromagnetic directional valve 3 is respectively communicated with a rod cavity and a rodless cavity of the first hydraulic cylinder 7, an oil outlet of the second electromagnetic directional valve 4 is respectively communicated with a rod cavity and a rodless cavity of the second hydraulic cylinder 8, an oil outlet of the first hydraulic cylinder 7 is communicated with the oil return pipeline through a first pressure release valve 5, and an oil outlet of the second hydraulic cylinder 8 is communicated with the oil return pipeline through a second pressure release valve 6; and the power output end of the first hydraulic cylinder 7 and the power output end of the second hydraulic cylinder 8 are respectively positioned at two sides of the axis of the gear to be measured.
In a specific embodiment, the first hydraulic cylinder 7 and the second hydraulic cylinder 8 may adopt a single-piston cylinder, and the first hydraulic cylinder 7 and the second hydraulic cylinder 8 may be adjustable between a maximum speed and a minimum speed.
The invention provides a gear axial fatigue strength experiment load loading device, which fixes a gear to be tested on a fixed base, fixes the radial direction to be tested so as to prevent the gear to be tested from moving in the radial direction, and is characterized in that two hydraulic cylinders are respectively arranged at two sides of the gear to be tested, and simultaneously applies axial load to the axial direction of the gear to be tested, so that the axial fatigue strength of the gear can be tested.
In the preferred scheme, a one-way valve 12 is arranged on an oil outlet pipeline at an oil outlet of the hydraulic pump 1, an oil outlet of the hydraulic pump 1 is communicated with an oil inlet of the one-way valve 12, and the one-way valve 12 can prevent the backflow phenomenon of hydraulic oil in the oil outlet pipeline.
In a preferred scheme, an oil filter 9 is arranged on an oil outlet pipeline between the one-way valve 12 and the first electromagnetic directional valve 3 and the second electromagnetic directional valve 4, and the oil filter 9 has large through-flow capacity and small pressure loss and can filter impurities in the oil outlet pipeline.
In a preferred embodiment, the oil filter 9 is an oil filter 9 having a bypass valve. In order to prevent the hydraulic pump 1 from being overloaded or the filter element from being broken due to the blockage of the oil filter 9, a bypass valve is connected in parallel with an oil filtering channel of the oil filter 9, or a blockage indicator is connected in parallel with the oil filter 9, and if the blockage occurs, a timely alarm can be given.
Preferably, the oil filter 9 can be a high pressure oil filter, because the pressure in the outlet line is high, and it is desirable that the oil filter 9 can withstand high pressure.
Preferably, the oil-saving control system further comprises an overflow valve 10, an oil outlet of the check valve 12 is communicated with an oil inlet of the overflow valve 10, an oil outlet of the overflow valve 10 is communicated with the oil return pipeline, and the overflow valve 10 can discharge over-high pressure in the oil outlet pipeline into the oil return pipeline so as to flow back to the oil tank.
The preferred scheme, still be equipped with the manometer 13 that is used for detecting oil pressure on the oil pipeline to in time acquire oil pressure on the oil pipeline.
In a preferable scheme, an oil filter 11 is arranged on the oil return pipeline, and an oil outlet of the oil filter 11 is communicated with an oil tank. The oil filter 11 has a large flow capacity and a small pressure loss, and can filter impurities in the return line to prevent the impurities from entering the oil tank.
In a preferred embodiment, the oil filter 11 on the return line is an oil filter with a bypass valve. In order to prevent the oil return line from being too high in oil pressure or causing the filter element to be broken due to the blockage of the oil filter 11, a bypass valve is connected in parallel with an oil filter channel of the oil filter 11, or a blockage indicator is connected in parallel with the oil filter 11, and if the blockage occurs, an alarm can be given in time.
The construction, features and functions of the present invention are described in detail in the embodiments illustrated in the drawings, which are only preferred embodiments of the present invention, but the present invention is not limited by the drawings, and all equivalent embodiments modified or changed according to the idea of the present invention should fall within the protection scope of the present invention without departing from the spirit of the present invention covered by the description and the drawings.
Claims (9)
1. A gear axial fatigue strength experiment load loading device is characterized by comprising a gear fixing base, an oil tank, a hydraulic pump, a motor, a first electromagnetic directional valve, a second electromagnetic directional valve, a first pressure release valve, a second pressure release valve, a first hydraulic cylinder and a second hydraulic cylinder, wherein the gear fixing base is used for fixing the tooth surface of a measured gear, the oil tank is respectively communicated with an oil outlet pipeline and an oil return pipeline, the hydraulic pump is driven by the motor, the hydraulic pump is arranged on the oil outlet pipeline, an oil inlet of the hydraulic pump is communicated with the oil tank, an oil outlet of the hydraulic pump is respectively communicated with oil inlets of the first electromagnetic directional valve and the second electromagnetic directional valve, an oil outlet of the first electromagnetic directional valve is respectively communicated with a rod cavity and a rodless cavity of the first hydraulic cylinder, an oil outlet of the second electromagnetic directional valve is respectively communicated with a rod cavity and a rodless cavity of the second hydraulic cylinder, the oil outlet of the first hydraulic cylinder is communicated with the oil return pipeline through a first pressure relief valve, and the oil outlet of the second hydraulic cylinder is communicated with the oil return pipeline through a second pressure relief valve; and the power output end of the first hydraulic cylinder and the power output end of the second hydraulic cylinder are respectively positioned at two sides of the axis of the gear to be measured.
2. The loading device for the gear axial fatigue strength experiment load according to claim 1, wherein a one-way valve is arranged on an oil outlet pipeline at an oil outlet of the hydraulic pump, and the oil outlet of the hydraulic pump is communicated with an oil inlet of the one-way valve.
3. The loading device for the gear axial fatigue strength test load according to claim 2, wherein an oil filter is arranged on an oil outlet pipeline between the one-way valve and the first electromagnetic directional valve and between the one-way valve and the second electromagnetic directional valve.
4. The gear axial fatigue strength test load loading device of claim 3, wherein the oil filter is an oil filter with a bypass valve.
5. The gear axial fatigue strength test load loading device according to claim 4, wherein the oil filter is a high-pressure oil filter.
6. The loading device for the gear axial fatigue strength experiment load according to claim 3, further comprising an overflow valve, wherein an oil outlet of the check valve is communicated with an oil inlet of the overflow valve, and an oil outlet of the overflow valve is communicated with the oil return pipeline.
7. The loading device for the gear axial fatigue strength experiment load according to claim 1, wherein a pressure gauge for detecting the oil pressure on the oil outlet pipeline is further arranged on the oil outlet pipeline.
8. The loading device for the axial fatigue strength test load of the gear according to claim 1, wherein an oil filter is arranged on the oil return pipeline, and an oil outlet of the oil filter is communicated with an oil tank.
9. The gear axial fatigue strength test load loading device of claim 8, wherein the oil filter is an oil filter having a bypass valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810871318.5A CN108956133B (en) | 2018-08-02 | 2018-08-02 | Gear axial fatigue strength experiment load loading device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810871318.5A CN108956133B (en) | 2018-08-02 | 2018-08-02 | Gear axial fatigue strength experiment load loading device |
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| CN108956133A CN108956133A (en) | 2018-12-07 |
| CN108956133B true CN108956133B (en) | 2021-03-30 |
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