CN214121586U - Valve spring thermal fatigue detection device - Google Patents
Valve spring thermal fatigue detection device Download PDFInfo
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- CN214121586U CN214121586U CN202121851751.6U CN202121851751U CN214121586U CN 214121586 U CN214121586 U CN 214121586U CN 202121851751 U CN202121851751 U CN 202121851751U CN 214121586 U CN214121586 U CN 214121586U
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- connecting plate
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- lifting disc
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- 238000001514 detection method Methods 0.000 title claims abstract description 16
- 238000004088 simulation Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 7
- 230000001808 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 230000002035 prolonged Effects 0.000 description 1
- 230000001105 regulatory Effects 0.000 description 1
- 230000001360 synchronised Effects 0.000 description 1
- 238000004642 transportation engineering Methods 0.000 description 1
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Abstract
The utility model discloses a valve spring thermal fatigue detection device, which relates to the technical field of spring detection and comprises a base station, wherein a bottom plate is fixedly connected to the table top of the base station, and a first guide post is vertically arranged on the bottom plate; a lifting disc and a first driving mechanism for driving the lifting disc to move up and down are arranged above the bottom plate, and a through hole is vertically formed in the lifting disc; a top plate and a second driving mechanism for driving the top plate to move up and down are arranged above the lifting disc, and a pressing sleeve is fixedly connected to the bottom surface of the top plate; the first guide post, the through hole and the pressing sleeve are coaxially arranged, the pressing sleeve and the through hole are in plug-in fit with a gap, and an inner hole of the pressing sleeve and the first guide post are in plug-in fit with a gap; the number of the first guide posts, the number of the through holes and the number of the pressing sleeves are multiple; the lifting disc is of a hollow structure and is connected with a medium circulating system. The utility model discloses treat the temperature environment that detects the spring during operation and carry out accurate simulation, the thermal fatigue of detection spring that can be accurate.
Description
Technical Field
The utility model relates to a spring detects technical field, in particular to valve spring thermal fatigue detection device.
Background
The valve spring is positioned between the cylinder cover and the spring seat at the tail end of the valve stem. The valve spring has the functions of ensuring that the valve can be tightly attached to a valve seat or a valve seat ring when closed, and overcoming the inertia force generated by a valve actuating mechanism when the valve is opened, so that the transmission parts are always controlled by the cam and are not separated from each other.
The service condition of the valve spring is harsh, the vibration frequency per minute is 2500-3000 times, the working stress is 700-800 MPa, and the working temperature is 120-150 ℃. Under such conditions, fatigue cracking and fracture failure are not allowed after long-term operation, permanent deformation is not larger than a predetermined value, and load characteristics are not excessively lowered, that is, stress relaxation resistance (stress relaxation is called as stress relaxation when stress is lowered with time under a constant strain condition) is high. The consequence of the fracture accident of the valve spring is very serious, the current domestic fatigue testing machine has the test conditions of room temperature and very low test frequency, the actual working temperature of the valve spring is about 100-150 ℃, and the compression frequency can reach 50-60 Hz at most. Under the test condition, the test data are inaccurate, and the test time is prolonged.
Disclosure of Invention
To above defect, the utility model aims at providing a valve spring thermal fatigue detection device aims at solving the inaccurate technical problem of valve spring thermal fatigue detection among the prior art.
In order to solve the technical problem, the technical scheme of the utility model is that:
a thermal fatigue detection device for a valve spring comprises a base station, wherein a bottom plate is fixedly connected to the table top of the base station, and a first guide column is vertically arranged on the bottom plate; a lifting disc and a first driving mechanism for driving the lifting disc to move up and down are arranged above the bottom plate, and a through hole is vertically formed in the lifting disc; a top plate and a second driving mechanism for driving the top plate to move up and down are arranged above the lifting disc, and a pressing sleeve is fixedly connected to the bottom surface of the top plate; the first guide post, the through hole and the pressing sleeve are coaxially arranged, the pressing sleeve and the through hole are in plug-in fit with a gap, and an inner hole of the pressing sleeve and the first guide post are in plug-in fit with a gap; the number of the first guide posts, the number of the through holes and the number of the pressing sleeves are multiple; the lifting disc is of a hollow structure and is connected with a medium circulating system.
Wherein, be equipped with the second guide post on the bottom plate, lifting disk and second guide post sliding connection.
Wherein, be equipped with the jack on the bottom plate, first guide post is pegged graft in the jack.
The lifting disc comprises a base station, a lifting disc and a first driving mechanism, wherein the base station is provided with at least two first sliding holes, the first driving mechanism comprises a first connecting plate located below the base station, a second connecting plate located above the base station and a hydraulic cylinder for driving the first connecting plate to vertically move, a first guide rod is fixedly connected between the first connecting plate and the second connecting plate, the first guide rod is connected in the first sliding holes in a sliding mode, and the lifting disc is detachably connected with the first guide rod.
The lifting disc is fixedly connected with a connecting block, a second sliding hole is formed in the connecting block, the first guide rod is connected in the second sliding hole in a sliding mode, a threaded hole communicated with the second sliding hole is formed in the connecting block, and a locking bolt is screwed in the threaded hole.
The second driving mechanism comprises a third connecting plate and a fourth connecting plate, the third connecting plate is located between the top plate and the second connecting plate, the fourth connecting plate is located between the second connecting plate and the third connecting plate, the third connecting plate is fixedly connected to the first guide rod, the second connecting plate is provided with a cylinder for driving the fourth connecting plate to ascend and descend, the third connecting plate is provided with at least two second sliding holes, the second sliding holes are internally and slidably connected with second guide rods, the bottom ends of the second guide rods are fixedly connected to the top plate, and the top ends of the second guide rods are fixedly connected to the fourth connecting plate.
After the technical scheme is adopted, the beneficial effects of the utility model are that:
the utility model discloses in, to wait to detect the spring and pack into on the first guide post, pneumatic cylinder drive lifting disc presses on the bottom plate, first guide post with wait to detect the spring and can enter into the through-hole, hydraulic press drive roof moves down, make and press the cover to enter into in the through-hole, the reciprocal lift of cylinder drive roof, the pressure that the cover lasts moves and waits to detect the spring, make and wait to detect the work that the spring lasts, thereby realize treating the simulation that detects spring operating condition, the constancy of the temperature of lifting disc is maintained through medium circulation system, thereby treat the temperature environment that detects the spring during operation and carry out accurate simulation, thereby the thermal fatigue of detection spring that can be accurate.
Drawings
Fig. 1 is a schematic perspective view of a thermal fatigue detection device for a valve spring according to the present invention;
FIG. 2 is a perspective sectional view of the lifter plate of FIG. 1;
in the figure, a base table 1, a bottom plate 10, a first guide column 100, a second guide column 101, a first connecting plate 11, a first guide rod 110, a second connecting plate 12, an air cylinder 120, a hydraulic cylinder 13, a third connecting plate 14, a fourth connecting plate 15, a second guide rod 150, a lifting disc 16, a through hole 160, a connecting block 161, a locking bolt 162, an inlet port 163, an outlet port 164, a top plate 17 and a pressing sleeve 170 are arranged.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
The position that involves in this specification all uses the position of the utility model relates to a valve spring thermal fatigue detection device during normal operating is the standard, does not restrict the position when its storage and transportation, only represents relative position relation, does not represent absolute position relation.
As shown in fig. 1 and fig. 2, the valve spring thermal fatigue detection device includes a base platform 1, a bottom plate 10 is fixedly connected to a table top of the base platform 1, and a first guide column 100 is vertically installed on the bottom plate 10;
be equipped with the first smooth hole of two at least vertical settings on base station 1, sliding connection has first guide bar 110 in the first smooth hole, 1 below of base station is equipped with first connecting plate 11, 1 top of base station is equipped with second connecting plate 12, the both ends difference rigid coupling of first guide bar 110 is on first connecting plate 11 and second connecting plate 12, install pneumatic cylinder 13 on the base station 1, the drive shaft rigid coupling of pneumatic cylinder 13 is in the bottom of first connecting plate 11, drive first connecting plate 11 through pneumatic cylinder 13, first guide bar 110 and the synchronous lift of second connecting plate 12.
The lifting disc 16 is arranged above the bottom plate 10, the lifting disc 16 is detachably connected with the first guide rod 110, a through hole 160 is vertically formed in the lifting disc 16, the lifting disc 16 is of a hollow structure, a liquid inlet port 163 and a liquid outlet port 164 which are communicated with an inner cavity are formed in the lifting disc 16, the lifting disc 16 is connected with a medium circulating system, the medium circulating system comprises an oily medium storage tank, the oily medium storage tank is connected with the liquid inlet port 163 through a liquid inlet pipeline, the liquid outlet port 164 is connected to the oily medium storage tank through a liquid outlet pipeline, and a heater and an oil pump are connected to the liquid inlet pipeline in series. The circulation of the oily medium is promoted by the oil pump, the temperature regulation and control of the oily medium are realized by the heater, and when the oily medium circulates to the lifting disc 16, heat can be continuously transferred to the lifting disc 16, so that the temperature of the lifting disc 16 can be regulated.
A top plate 17 is arranged above the lifting disc 16, a pressing sleeve 170 is fixedly connected to the bottom surface of the top plate 17, a third connecting plate 14 is arranged between the top plate 17 and the second connecting plate 12, a fourth connecting plate 15 is arranged between the second connecting plate 12 and the third connecting plate 14, the third connecting plate 14 is fixedly connected with the first guide rod 110, the cylinder 120 is installed at the top of the second connecting plate 12, a driving shaft of the cylinder 120 is fixedly connected to the top surface of the fourth connecting plate 15, at least two second sliding holes are formed in the third connecting plate 14, a second guide rod 150 is slidably connected to the second sliding holes, the bottom end of the second guide rod 150 is fixedly connected to the top plate 17, and the top end of the second guide rod 150 is fixedly connected to the fourth connecting plate 15. The top plate 17 can be driven to stably lift through the air cylinder 120.
During use, the hydraulic cylinder 13 drives the first connecting plate 11 to ascend, so that the lifting disc 16 is driven to ascend, a distance of 20-30 cm exists between the bottom surface of the lifting disc 16 and the top surface of the first guide column 100, then springs to be detected are installed on the first guide columns 100, a spring to be detected is sleeved on each first guide column 100, the hydraulic cylinder 13 drives the first connecting plate 11 to reset, the lifting disc 16 is pressed on the bottom plate 10, the first guide columns 100 and the springs to be detected can enter the through holes 160, the lifting disc 16 and the first guide rods 110 are separated, the hydraulic machine drives the first connecting plate 11 to descend for a certain distance, the top plate 17 moves downwards, and the end portion of the pressing sleeve 170 enters the through holes 160. And finally, the air cylinder 120 is started to drive the top plate 17 to reciprocate, the pressing sleeve 170 continuously presses the spring to be detected, so that the spring to be detected continuously works, the working state of the spring to be detected is simulated, the constant temperature of the lifting disc 16 is maintained through the medium circulating system, the temperature environment of the spring to be detected during working is accurately simulated, and the thermal fatigue of the spring can be accurately detected.
Further, a second guide post 101 is vertically and fixedly connected to the middle of the bottom plate 10, and the lifting plate 16 is slidably connected to the second guide post 101.
Further, a jack is disposed on the base plate 10, and the first guide post 100 is inserted into the jack. The first guide post 100 is more convenient to disassemble and assemble, and the first guide post 100 is convenient to replace and clean.
Preferably, the lifting plate 16 is fixedly connected with a connecting block 161, the connecting block 161 is provided with a second sliding hole, the first guide rod 110 is slidably connected in the second sliding hole, the connecting block 161 is provided with a threaded hole communicated with the second sliding hole, and the threaded hole is internally threaded with a locking bolt 162. By turning the locking bolt 162, the locking bolt 162 can be pressed against the first guide bar 110, thereby achieving the fixed connection of the lifting disc 16 and the first guide bar 110.
The present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes without creative labor from the above conception, and all the changes fall within the protection scope of the present invention.
Claims (6)
1. A valve spring thermal fatigue detection device comprises a base station and is characterized in that,
a bottom plate is fixedly connected to the table top of the base station, and a first guide column is vertically arranged on the bottom plate;
a lifting disc and a first driving mechanism for driving the lifting disc to move up and down are arranged above the bottom plate, and a through hole is vertically formed in the lifting disc;
a top plate and a second driving mechanism for driving the top plate to move up and down are arranged above the lifting disc, and a pressing sleeve is fixedly connected to the bottom surface of the top plate;
the first guide post, the through hole and the pressing sleeve are coaxially arranged, the pressing sleeve and the through hole are in plug-in fit with a gap, and an inner hole of the pressing sleeve and the first guide post are in plug-in fit with a gap;
the number of the first guide posts, the number of the through holes and the number of the pressing sleeves are multiple;
the lifting disc is of a hollow structure and is connected with a medium circulating system.
2. The valve spring thermal fatigue detecting device according to claim 1, wherein a second guide post is provided on the base plate, and the lifting plate is slidably connected to the second guide post.
3. The valve spring thermal fatigue detecting device according to claim 1, wherein a receptacle is provided on the base plate, and the first guide post is inserted into the receptacle.
4. The thermal fatigue detection device for the valve spring according to claim 1, wherein the base platform is provided with at least two first sliding holes, the first driving mechanism comprises a first connecting plate located below the base platform, a second connecting plate located above the base platform, and a hydraulic cylinder for driving the first connecting plate to vertically move, a first guide rod is fixedly connected between the first connecting plate and the second connecting plate, the first guide rod is slidably connected in the first sliding hole, and the lifting disc is detachably connected with the first guide rod.
5. The thermal fatigue detecting device for the valve spring according to claim 4, wherein a connecting block is fixedly connected to the lifting plate, a second sliding hole is formed in the connecting block, the first guide rod is slidably connected to the second sliding hole, a threaded hole communicated with the second sliding hole is formed in the connecting block, and a locking bolt is screwed in the threaded hole.
6. The thermal fatigue detection device for the valve spring according to claim 4, wherein the second driving mechanism comprises a third connecting plate and a fourth connecting plate, the third connecting plate is located between the top plate and the second connecting plate, the fourth connecting plate is located between the second connecting plate and the third connecting plate, the third connecting plate is fixedly connected to the first guide rod, the second connecting plate is provided with a cylinder for driving the fourth connecting plate to ascend and descend, the third connecting plate is provided with at least two second sliding holes, the second sliding holes are slidably connected with second guide rods, the bottom ends of the second guide rods are fixedly connected to the top plate, and the top ends of the second guide rods are fixedly connected to the fourth connecting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121851751.6U CN214121586U (en) | 2021-08-10 | 2021-08-10 | Valve spring thermal fatigue detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121851751.6U CN214121586U (en) | 2021-08-10 | 2021-08-10 | Valve spring thermal fatigue detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214121586U true CN214121586U (en) | 2021-09-03 |
Family
ID=77496814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121851751.6U Active CN214121586U (en) | 2021-08-10 | 2021-08-10 | Valve spring thermal fatigue detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214121586U (en) |
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2021
- 2021-08-10 CN CN202121851751.6U patent/CN214121586U/en active Active
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