CN107560854B - Durability testing device and method for needle bearing - Google Patents
Durability testing device and method for needle bearing Download PDFInfo
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- CN107560854B CN107560854B CN201710916031.5A CN201710916031A CN107560854B CN 107560854 B CN107560854 B CN 107560854B CN 201710916031 A CN201710916031 A CN 201710916031A CN 107560854 B CN107560854 B CN 107560854B
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- 238000012360 testing method Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title description 3
- 230000007246 mechanism Effects 0.000 claims abstract description 70
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 61
- 238000010998 test method Methods 0.000 claims abstract description 12
- 239000000047 product Substances 0.000 claims description 29
- 239000013589 supplement Substances 0.000 claims description 4
- 238000011065 in-situ storage Methods 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Abstract
The invention provides a durability testing device for a needle bearing, which can effectively realize durability testing, thereby meeting the requirement of durable use for a certain time; the invention also provides a durability test method of the needle roller bearing; the hydraulic pressure loading device comprises a supporting plate, wherein a rotary loading mechanism is arranged on the supporting plate and is connected with an eccentric block of a hydraulic pressure fluctuation connecting rod mechanism, a linkage rod of the hydraulic pressure fluctuation connecting rod mechanism is connected with a piston rod of a pressurizing cylinder of an air pressure loading mechanism, the pressurizing cylinder is connected and communicated with a water container of an angle rotating mechanism through a pipeline, the pressurizing cylinder of the air pressure loading mechanism is electrically connected with an electric proportional valve and an air pressure two-way valve, and the rotary loading mechanism, the hydraulic pressure fluctuation connecting rod mechanism, the air pressure loading mechanism and the angle rotating mechanism are electrically connected.
Description
Technical Field
The invention relates to the technical field of needle bearings, in particular to a durability testing device and a durability testing method of a needle bearing.
Background
The existing automobile adjusts the power of the automobile by adjusting the size of a valve, is also the most important part of an automobile engine, and when the valve is adjusted, a needle bearing is arranged on a shaft connected with the valve to play a role of supporting and rotating, and the needle bearing is tested for the performance of the automobile, such as load abrasion, pitting corrosion and the like, but is relatively deficient in the durability test of the needle bearing, and part of customers need to durable use of the needle bearing for a certain time, so the durability test of the needle bearing is necessary.
Disclosure of Invention
In view of the above problems, the present invention provides a durability test device for needle bearings, which can effectively realize a durability test so as to satisfy a durable use for a certain time; the invention also provides a durability test method of the needle roller bearing.
The technical scheme is characterized by comprising a supporting plate, wherein a rotary loading mechanism is arranged on the supporting plate and is connected with an eccentric block of a water pressure fluctuation connecting rod mechanism, a linkage rod of the water pressure fluctuation connecting rod mechanism is connected with a piston rod of a pressurizing cylinder of an air pressure loading mechanism, the pressurizing cylinder is connected and communicated with a water container of an angle rotating mechanism through a pipeline, the pressurizing cylinder of the air pressure loading mechanism is electrically connected with an electric proportional valve and an air pressure two-way valve, and the rotary loading mechanism, the water pressure fluctuation connecting rod mechanism, the air pressure loading mechanism and the angle rotating mechanism are electrically connected.
It is further characterized by:
the angle rotating mechanism comprises a rotating motor and a support frame which is positioned at one side end of the support plate and is shaped like a Chinese character 'shan', the rotating motor is connected with one end of a rotating shaft through a coupler after being connected with a first speed reducing head, the other end of the rotating shaft penetrates through the water container and is arranged on the support frame through a first bearing, a water pressure gauge is arranged on the water container, and a product to be measured is arranged on the rotating shaft in the water container;
the air pressure loading mechanism comprises a pressurizing cylinder fixed on the supporting plate, the pressurizing cylinder is connected with the water container through the pipeline, a fixed block is arranged on the supporting plate, and one end of the linkage rod penetrates through the fixed block and then is connected with a piston rod of the pressurizing cylinder;
the rotary loading mechanism comprises a fixed frame fixed at the other side end of the supporting plate, a second speed reducing head is arranged on the fixed frame, and a servo motor is connected with the second speed reducing head and then connected with the eccentric block of the water pressure fluctuation connecting rod mechanism;
the hydraulic fluctuation connecting rod mechanism comprises an eccentric mechanism, a roller and a linkage rod, wherein the eccentric mechanism comprises a rotating wheel and an eccentric block, the rotating wheel and the roller are connected through a connecting rod, the roller is arranged in a U-shaped fixed block through a pin shaft, the fixed block is connected with the other end of the linkage rod, the bottom of the eccentric block is connected with the second reduction head, a dovetail groove is formed in the eccentric block, the bottom of a sliding rod is assembled in the dovetail groove, and the upper end of the sliding rod is assembled in the rotating wheel through a second bearing;
a durability test method of a needle bearing is characterized in that: the specific test method comprises the following steps:
(1) Setting the endurance test time of the tested product, after the tested product is mounted on the rotating shaft in the water container, transmitting a pressurizing instruction to the electric proportional valve through the servo controller, adding basic air pressure into the pressurizing cylinder through the electric proportional valve, completing the basic air pressure increase, and closing the air pressure two-way valve after the air pressure is stable;
(2) The servo motor moves to drive the eccentric block to rotate, the rotating wheel and the roller connected with the rotating wheel drive the linkage rod to move back and forth, and then the piston rod moves to compress the pressurizing cylinder to generate sine wave air pressure;
(3) The rotary motor and the servo motor synchronously move, after the pressurizing cylinder is connected with the water container through a pipeline, sine wave air pressure generated by the pressurizing cylinder is converted into circulating sine wave water pressure, whether the end part of a tested product on the rotating shaft in the water container is water-permeable or not is observed under the changing water pressure, and if the tested product is water-permeable in the durable test time, the durable test of the tested product is realized;
it is further characterized by:
the endurance test time of the tested product is 1008h, the rotating wheel rotates for one circle to form one period, and the service time of each period is 1s, namely the tested product realizes the endurance test within 1008h multiplied by 60min multiplied by 60s periods;
when the rotating motor and the servo motor synchronously move, the rotating angles of the rotating motor and the servo motor are corresponding, and the corresponding relation is as follows: when the rotating motor rotates 0 degrees in the forward direction, namely the eccentric block driven by the servo motor is in situ, the piston rod is positioned in the middle of the pressurizing cylinder;
when the rotating motor rotates forward by 45 degrees, namely the eccentric block driven by the servo motor rotates clockwise by 1/4 circle, the piston rod is positioned at the bottommost part of the pressurizing cylinder;
when the rotating motor rotates 90 degrees in the forward direction, namely the eccentric block driven by the servo motor rotates 1/2 circle clockwise, the piston rod is positioned in the middle of the pressurizing cylinder;
when the rotating motor reversely rotates by 45 degrees, namely the eccentric block driven by the servo motor rotates clockwise for 3/4 of a circle, the piston rod is positioned at the outermost part of the pressurizing cylinder;
when the rotating motor reversely rotates by 90 degrees, namely the eccentric block driven by the servo motor completes one circle of rotation, the piston rod is positioned in the middle of the pressurizing cylinder;
the sine wave air pressure in the pressurizing cylinder in the step (2) is 0.02-1 mpa;
in the step (3), the water pressure gauge monitors the pressure value in the water container, and if the pressure value is not within the set range, the sliding rod slides in the dovetail groove towards the pressurizing cylinder, so that the linkage rod drives the piston rod to move so as to compress and supplement air pressure for the pressurizing cylinder.
The invention has the advantages that the servo controller transmits a pressurizing instruction to the electric proportional valve, basic air pressure is increased to the air pressure loading mechanism through the electric proportional valve, after the basic air pressure is increased, and the air pressure is stable, the air pressure two-way valve is closed, the angle rotating mechanism and the rotating loading mechanism synchronously move, the rotating loading mechanism acts to enable the air pressure loading mechanism to generate sine wave air pressure, then the sine wave air pressure is converted into sine wave water pressure circulating in the water container, whether the end part of a tested product is water-permeable is observed under the sine wave water pressure, and if the tested product is not water-permeable in the endurance test time, the endurance test of the tested product is realized, thereby meeting the endurance use of a certain time required by a customer.
Drawings
FIG. 1 is a schematic diagram of the front view of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
fig. 3 is a perspective view of the present invention.
Detailed Description
As shown in fig. 1-3, the invention comprises a supporting plate 1, wherein a rotary loading mechanism is arranged on the supporting plate 1 and is connected with an eccentric block 18 of a water pressure fluctuation connecting rod mechanism, a linkage rod 12 of the water pressure fluctuation connecting rod mechanism is connected with a piston rod of a pressurizing cylinder 10 of an air pressure loading mechanism, the pressurizing cylinder 10 is connected and communicated with a water container 8 of an angle rotating mechanism through a pipeline, the pressurizing cylinder 10 of the air pressure loading mechanism is electrically connected with an electric proportional valve 2 and an air pressure two-way valve 3, the rotary loading mechanism, the water pressure fluctuation connecting rod mechanism, the air pressure loading mechanism and the angle rotating mechanism are electrically connected, namely, the angle rotating mechanism, the air pressure loading mechanism, the rotary loading mechanism, the electric proportional valve 2 and the air pressure two-way valve 3 are correspondingly electrically connected with a servo controller, the servo controller adopts an ethcat controller, and a product to be measured is arranged on the angle rotating mechanism.
The angle rotating mechanism comprises a rotating motor 4 and a support frame 5 which is positioned at one side end of a support plate 1 and is shaped like a Chinese character 'shan', the rotating motor 4 is connected with a first speed reducing head 27 and then is connected with a rotating shaft 7 in a shaft way through a shaft coupling 6, the shaft coupling 6 is an elastic shaft coupling, the other end of the rotating shaft 7 penetrates through a water permeable container 8 and then is arranged on the support frame 5 through a first bearing 9, a water pressure gauge 9 is arranged on the water container 8, and a product to be measured is arranged on the rotating shaft 7 in the water container 8.
The air pressure loading mechanism comprises a pressurizing cylinder 10 fixed on the supporting plate 1, the pressurizing cylinder 10 is connected with the water container 8 through a pipeline, a fixed block 11 is installed on the supporting plate 1, and one end of the linkage rod 12 penetrates through the fixed block 11 and then is connected with a piston rod of the pressurizing cylinder 10.
The rotary loading mechanism comprises a fixed frame 13 fixed at the other side end of the supporting plate 1, a second speed reducing head 14 is arranged on the fixed frame 13, and a servo motor 15 is connected with the second speed reducing head 14 and then connected with the water pressure fluctuation link mechanism; the hydraulic fluctuation link mechanism comprises an eccentric mechanism and a roller 17, wherein the eccentric mechanism comprises a rotating wheel 16 and an eccentric block 18, the rotating wheel 16 and the roller 17 are connected through a link 19, the roller 17 is arranged in a U-shaped fixed block 21 through a pin shaft 20, the fixed block 21 is connected with the other end of a linkage rod 12, the bottom of the eccentric block 18 is connected with a second speed reducing head 14, a dovetail groove 22 is formed in the eccentric block 18, the bottom of a sliding rod 23 is assembled in the dovetail groove 22, and the upper end of the sliding rod 23 is assembled in the rotating wheel 16 through a second bearing 24.
The first bearing 9 and the second bearing 24 are deep groove ball bearings; the water container 8 is a transparent container.
The durability test method of the needle bearing, supposing that the durability test time required by the tested product is 1008h, when the rotating motor 4 and the servo motor 15 synchronously move, the rotation of the rotating motor 4 corresponds to the angle of the servo motor 15 for compressing the pressurizing cylinder 10 to generate sine wave air pressure, the corresponding relation can be changed in a test system of the servo controller according to the situation, the rotating wheel 16 rotates for one circle, the service time of each circle is 1s, the tested product needs to meet the durability test of whether water seepage exists in 1008h multiplied by 60min multiplied by 60s, the sine wave water pressure of each circle changes between 0.22mpa and 0.32mpa, namely the tested product carries out the durability test under the water pressure of 0.22mpa to 0.32mpa;
the working process of each period is that the specific test method is as follows:
(1) After the tested product is arranged on a rotating shaft 7 in a water container 8, a pressurizing instruction is transmitted to the electric proportional valve 2 through a servo controller, basic air pressure of 0.27Mpa is added into the pressurizing cylinder 10 through the electric proportional valve 2, the basic air pressure can be freely set according to the needs of customers, the basic air pressure is increased, and after the air pressure is stable, the air pressure two-way valve 3 is closed;
(2) The servo motor 15 moves to drive the eccentric block 18 to rotate, the rotating wheel 16 and the roller 17 connected with the rotating wheel drive the linkage rod 12 to move back and forth, then the piston rod moves to compress the pressurizing cylinder 10 to generate sine wave air pressure of 0.22 mpa-0.32 mpa, namely, the eccentric block 18 rotates for one circle to be equivalent to the back and forth movement of the linkage rod 12, the eccentric block 18 rotates for one circle to be set as the positive and negative rotation of the rotating shaft 7 by 0-90 degrees, namely, the corresponding relation of the rotating angle of the rotating motor 4 and the servo motor 15 and the corresponding pressure value are as follows:
when the rotating motor 4 rotates 0 degrees in the forward direction, namely the eccentric block 18 driven by the servo motor 15 is in the original position, the piston rod is positioned in the middle of the booster cylinder 10, and the pressure value of the booster cylinder 10 is 0.27Mpa;
when the rotating motor 4 rotates forward by 45 degrees, namely the eccentric block 18 driven by the servo motor 15 rotates clockwise by 1/4 circle, the piston rod is positioned at the bottommost part of the booster cylinder 10, and the air pressure generated by the booster cylinder 10 is 0.32Mpa;
when the rotating motor 4 rotates 90 degrees in the forward direction, namely the eccentric block 18 driven by the servo motor 15 rotates 1/2 circle clockwise, the piston rod is positioned in the middle of the booster cylinder 10, and the air pressure generated by the booster cylinder 10 is 0.27Mpa;
when the rotary motor 4 reversely rotates by 45 degrees, namely the eccentric block 18 driven by the servo motor 15 rotates 3/4 of a circle clockwise, the piston rod is positioned at the outermost part of the booster cylinder 10, and the air pressure generated by the booster cylinder 10 is 0.22Mpa;
when the rotary motor 4 reversely rotates by 90 degrees, namely the eccentric block 18 driven by the servo motor 15 completes one rotation, the piston rod is positioned in the middle of the booster cylinder 10, and the air pressure generated by the booster cylinder 10 is 0.27Mpa;
(3) Simultaneously, the rotating motor 4 synchronously moves, after the pressurizing cylinder 10 is connected with the water container 8 through a pipeline, sine wave air pressure generated by the pressurizing cylinder 10 is converted into corresponding circulating sine wave water pressure of 0.22 mpa-0.32 mpa, whether the end part of a tested product on the rotating shaft 7 in the water container 8 is water-permeable or not is observed under the changing water pressure, the tested product is subjected to endurance test for a certain time through the water-permeable condition, and if the tested product has no water-permeable in 1008h multiplied by 60min multiplied by 60s periods, the tested product is qualified, and 1008h endurance use required by customers can be met; and the water pressure gauge 9 monitors the pressure value in the water container 8, if the sine wave air pressure or the sine wave water pressure value is not in the range of 0.22-0.32 mpa in each period, the sliding rod 23 slides in the dovetail groove 22 towards the pressurizing cylinder 10, so that the linkage rod 12 drives the piston rod to move to compress and supplement the pressurizing cylinder 10 with air pressure, the air pressure value is in the range of 0.22-0.32 mpa, and after the supplement is completed, the sliding rod 23 is fixed in the dovetail groove 22.
In the figure, 25 is a deep groove ball bearing; 26 is a sealing ring.
Claims (8)
1. The durability testing device for the needle bearing is characterized by comprising a supporting plate, wherein a rotary loading mechanism is arranged on the supporting plate and is connected with an eccentric block of a water pressure fluctuation connecting rod mechanism, a linkage rod of the water pressure fluctuation connecting rod mechanism is connected with a piston rod of a pressurizing cylinder of an air pressure loading mechanism, the pressurizing cylinder is connected and communicated with a water container of an angle rotation mechanism through a pipeline, the pressurizing cylinder of the air pressure loading mechanism is electrically connected with an electric proportional valve and an air pressure two-way valve, and the rotary loading mechanism, the water pressure fluctuation connecting rod mechanism, the air pressure loading mechanism and the angle rotation mechanism are electrically connected;
the angle rotating mechanism comprises a rotating motor and a support frame which is positioned at one side end of the support plate and is shaped like a Chinese character 'shan', the rotating motor is connected with one end of a rotating shaft through a coupler after being connected with a first speed reducing head, the other end of the rotating shaft penetrates through the water container and is arranged on the support frame through a first bearing, a water pressure gauge is arranged on the water container, and a product to be measured is arranged on the rotating shaft in the water container;
the air pressure loading mechanism comprises a pressurizing cylinder fixed on the supporting plate, the pressurizing cylinder is connected with the water container through a pipeline, a fixed block is installed on the supporting plate, and one end of the linkage rod penetrates through the fixed block and then is connected with a piston rod of the pressurizing cylinder.
2. The durability testing device for needle bearings according to claim 1, wherein the rotary loading mechanism comprises a fixing frame fixed to the other side end of the supporting plate, a second speed reducing head is mounted on the fixing frame, and a servo motor is connected with the second speed reducing head and then connected with the eccentric block of the hydraulic fluctuation link mechanism.
3. The durability test device for the needle roller bearing according to claim 2, wherein the hydraulic fluctuation link mechanism comprises an eccentric mechanism, a roller and a linkage rod, the eccentric mechanism comprises a rotating wheel and an eccentric block, the rotating wheel and the roller are connected through a link rod, the roller is arranged in a U-shaped fixed block through a pin shaft, the fixed block is connected with the other end of the linkage rod, the bottom of the eccentric block is connected with the second reduction head, a dovetail groove is formed in the eccentric block, the bottom of a sliding rod is assembled in the dovetail groove, and the upper end of the sliding rod is assembled in the rotating wheel through a second bearing.
4. A durability test method using a durability test apparatus for needle bearings according to claim 1, characterized in that: the specific test method comprises the following steps:
(1) Setting the endurance test time of the tested product, after the tested product is mounted on the rotating shaft in the water container, transmitting a pressurizing instruction to the electric proportional valve through the servo controller, adding basic air pressure into the pressurizing cylinder through the electric proportional valve, completing the basic air pressure increase, and closing the air pressure two-way valve after the air pressure is stable;
(2) The servo motor moves to drive the eccentric block to rotate, the rotating wheel and the roller connected with the rotating wheel drive the linkage rod to move back and forth, and then the piston rod moves to compress the pressurizing cylinder to generate sine wave air pressure;
(3) After the pressurizing cylinder is connected with the water container through a pipeline, sine wave air pressure generated by the pressurizing cylinder is converted into circulating sine wave water pressure, whether water seepage exists at the end part of a tested product on the rotating shaft in the water container is observed under the changing water pressure, and if no water seepage exists in the tested product in the durable testing time, the durable testing of the tested product is realized.
5. The endurance test method according to claim 4, wherein the endurance test time of the product under test is 1008h, the rotating wheel rotates one circle for one period, and the service time of each period is 1s, namely the product under test realizes the endurance test within 1008h x 60min x 60s periods.
6. The endurance test method according to claim 4, wherein when the rotating motor and the servo motor synchronously move, the rotating motor and the servo motor rotate at corresponding angles, and the corresponding relationship is:
when the rotating motor rotates 0 degrees in the forward direction, namely the eccentric block driven by the servo motor is in situ, the piston rod is positioned in the middle of the pressurizing cylinder;
when the rotating motor rotates forward for 45 degrees, namely the eccentric block driven by the servo motor rotates clockwise for 1/4 of a circle, the piston rod is positioned at the bottommost part of the pressurizing cylinder;
when the rotating motor rotates 90 degrees in the forward direction, namely the eccentric block driven by the servo motor rotates 1/2 circle clockwise, the piston rod is positioned in the middle of the pressurizing cylinder;
when the rotating motor reversely rotates for 45 degrees, namely the eccentric block driven by the servo motor rotates for 3/4 of a circle clockwise, the piston rod is positioned at the outermost part of the pressurizing cylinder;
when the rotating motor reversely rotates by 90 degrees, namely the eccentric block driven by the servo motor completes one circle of rotation, the piston rod is positioned in the middle of the pressurizing cylinder.
7. The endurance test method according to claim 4, wherein the sine wave air pressure in the boost cylinder in the step (2) is 0.02mpa to 1mpa.
8. The endurance test method as claimed in claim 4, wherein in the step (3), a water pressure gauge monitors a pressure value in the water container, and if the pressure value is not within a set range, the pressure value is slid toward the pressurizing cylinder through a sliding rod in a dovetail groove on the eccentric block, so that the linkage rod drives a piston rod to move to compress the pressurizing cylinder to supplement air pressure.
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| CN201710916031.5A CN107560854B (en) | 2017-09-30 | 2017-09-30 | Durability testing device and method for needle bearing |
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| CN201710916031.5A CN107560854B (en) | 2017-09-30 | 2017-09-30 | Durability testing device and method for needle bearing |
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| CN107560854B true CN107560854B (en) | 2024-03-19 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109855871B (en) * | 2019-01-03 | 2021-01-22 | 洛阳轴承研究所有限公司 | Needle bearing test equipment |
| CN113155455B (en) * | 2021-04-14 | 2022-06-14 | 人本股份有限公司 | Needle bearing test mechanism |
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