CN116181632B - Electromagnetic excitation type diaphragm compressor diaphragm hydrogen environment life test device - Google Patents
Electromagnetic excitation type diaphragm compressor diaphragm hydrogen environment life test device Download PDFInfo
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- CN116181632B CN116181632B CN202211533075.7A CN202211533075A CN116181632B CN 116181632 B CN116181632 B CN 116181632B CN 202211533075 A CN202211533075 A CN 202211533075A CN 116181632 B CN116181632 B CN 116181632B
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- diaphragm
- life test
- test device
- armature
- core
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
- F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a hydrogen environment life test device for a diaphragm of an electromagnetic excitation diaphragm compressor, and belongs to the technical field of compressors. Including life test device body, electromagnet controller and outside air feed system set up respectively in the both sides of life test device body, life test device body includes down casing, the diaphragm that awaits measuring, goes up casing, electromagnet, armature nut, down magnetic core, goes up magnetic core, magnetic conduction base and magnetic conduction stick, goes up casing and lower casing and can dismantle the connection, lower magnetic core, go up magnetic core and lower casing and last casing respectively can dismantle the connection, last shaft hole of having seted up on the magnetic core. Through providing an electromagnetic excitation type diaphragm compressor diaphragm hydrogen environment life test device, can realize the accelerated life test of different frequencies, mechanical limit guarantees the diaphragm strain value, and the accuracy is high, has reduced the life test cost of diaphragm in hydrogen environment.
Description
Technical Field
The invention relates to a hydrogen environment life test device for a diaphragm of an electromagnetic excitation diaphragm compressor, and belongs to the technical field of compressors.
Background
In a hydrogen plant, a hydrogen diaphragm compressor is one of the most important devices, and a diaphragm is one of the most critical components in the diaphragm compressor, and the service life of the diaphragm compressor directly determines the service life of the diaphragm compressor without faults.
Hydrogen gas, because of small molecules and active chemical properties, can penetrate into the metal, so that the metal is corroded in various modes, namely a commonly-called hydrogen embrittlement phenomenon, and has a certain influence on the strength and ductility of the metal, and the influence is aggravated when the environmental pressure is higher.
Therefore, it is important to perform the fatigue test of the membrane under the high-pressure hydrogen environment.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the device solves the problem of fatigue test of the diaphragm in the hydrogen environment in the prior art.
The technical problems to be solved by the invention are realized by adopting the following technical scheme:
the device comprises a life test device body, an electromagnetic chuck controller and an external air supply system, wherein the electromagnetic chuck controller and the external air supply system are respectively arranged at two sides of the life test device body, the life test device body comprises a lower shell, a diaphragm to be tested, an upper shell, an electromagnetic chuck, an armature nut, a lower magnetic core, an upper magnetic core, a magnetic conduction base and a magnetic conduction rod, and the upper shell is detachably connected with the lower shell;
the lower magnetic core and the upper magnetic core are respectively detachably connected with the lower shell and the upper shell, the upper magnetic core is provided with a shaft hole, the armature is arranged in the shaft hole and axially moves along the shaft hole, and a sealing ring is arranged between the lower magnetic core and the upper magnetic core;
the diaphragm to be measured is provided with a central hole, the central hole is in clearance fit with the outer circle of the corresponding position of the armature, and the diaphragm to be measured is positioned between the armature and the armature nut;
the electromagnetic chuck and the lower magnetic core are sequentially contacted through the end surface contact, the armature, the upper magnetic core, the magnetic rod, the magnetic base and the electromagnetic chuck to form a closed magnetic circuit.
The lower magnetic conducting core, the armature, the upper magnetic conducting core, the magnetic conducting rod and the magnetic conducting base are made of magnetic conducting materials including but not limited to 45 steel or silicon steel, and the upper shell and the lower shell are made of non-magnetic austenitic stainless steel, so that good compatibility of the pressure-bearing shell and hydrogen is ensured. The lower shell is connected with the upper shell through bolts, is sealed through O-shaped rings, and is sealed with the end face O-shaped rings of the diaphragm to be tested respectively. The diaphragm to be measured is pressed and positioned by the upper shell and the lower shell, so that the constraint purpose of the edge of the outer circular edge of the diaphragm to be measured is realized.
As a preferable example, the upper magnetic core and the lower magnetic core are provided with shaft holes.
The armature iron and the upper magnetic core are matched through the clearance of the shaft hole, so that axial movement guiding is realized.
As a preferred example, the lower housing is provided with a screw interface connected to an external air supply system.
The lower shell is provided with a threaded interface which is connected with an external air supply system, so that the high-pressure hydrogen environment of the diaphragm to be tested can be realized.
As a preferred example, the center of the armature is provided with a balance air hole.
The center of the armature is provided with a through balance air hole, so that the armature is prevented from being blocked due to the closed air cavity.
As a preferred example, the seal ring is an O-ring.
As a preferable example, the membrane to be measured is provided with fins, and the fins are provided with rounded root parts.
The fillet design of the fin root avoids the influence of local stress concentration on experimental results.
As a preferred example, a guide bushing is provided between the upper magnetically permeable core and the armature.
The guide bushing is made of non-magnetic material and is made of non-metal material with self-lubricating capability.
As a preferred example, the guide bushing is in interference fit with the upper magnetically permeable core.
An interference fit is adopted to ensure that mutual disengagement does not occur.
As a preferable example, a coil spring is provided in the upper core.
The coil spring is made of stainless steel materials to avoid magnetic field short circuit.
The beneficial effects of the invention are as follows:
1. according to the invention, by adjusting the excitation frequency of the electromagnetic chuck and the natural frequency of the system, accelerated life tests of different frequencies can be realized, the strain value of the diaphragm is ensured through mechanical limiting, the accuracy is high, and the life test cost of the diaphragm in a hydrogen environment is reduced.
2. According to the invention, different diaphragm strains can be realized by adjusting the positions of the upper dead point and the lower dead point of the armature, and different stress states of the compressor diaphragms can be matched.
3. According to the invention, the service life of the diaphragm is tested in a stress equivalent mode, the diaphragms with different specifications can be tested in a smaller size, the volume is compact, and the power consumption is extremely low.
4. The high-pressure cavity has smaller volume, little hydrogen consumption and high safety.
5. The device has simple system and small occupied space, and can realize multi-sample synchronous test with lower cost.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of a structure of a diaphragm to be tested;
FIG. 3 is a schematic view of the overall structure of a life test device body;
fig. 4 is a schematic cross-sectional view of a life test device body.
In the figure: 1. a lower housing; 2. a membrane to be measured; 3. an upper housing; 4. an electromagnetic chuck; 5. an armature; 6. an armature nut; 7. a lower magnetically permeable core; 8. an upper magnetically permeable core; 9. a magnetic conduction base; 10. a magnetic conducting rod; 11. a threaded interface; 12. a bolt; 13. a shaft hole; 14. balancing air holes; 15. a seal ring; 16. a central bore; 17. a fin; 18. a guide bushing; 19. a coil spring.
Detailed Description
The invention will be further described with reference to the following detailed drawings and examples, in order to make the technical means, the creation features, the achievement of the objects and the effects of the invention easily understood.
Example 1:
as shown in figures 1-3, the hydrogen environment life test device for the diaphragm of the electromagnetic excitation diaphragm compressor comprises a life test device body, an electromagnetic chuck controller and an external air supply system, wherein the electromagnetic chuck controller and the external air supply system are respectively arranged on two sides of the life test device body.
The electromagnetic chuck controller can control the magnetization and demagnetization of the electromagnetic chuck 4 to realize alternating electromagnetic driving force, and can also adjust the magnetization and demagnetization frequency of the electromagnetic chuck 4.
The external air supply system is connected with the life test device body through the high-pressure air supply pipe, so that test environments of different hydrogen pressures can be realized, and test requirements are met.
The life test device body comprises a lower shell 1, a diaphragm to be tested 2, an upper shell 3, an electromagnetic chuck 4, an armature 5, an armature nut 6, a lower magnetic core 7, an upper magnetic core 8, a magnetic base 9 and a magnetic rod 10. The lower shell 1 and the upper shell 3 are made of non-magnetic austenitic stainless steel, and the lower magnetic conductive core 7, the armature 5, the upper magnetic conductive core 8, the magnetic conductive rod 10 and the magnetic conductive base 9 are made of magnetic conductive materials, including but not limited to 45 steel or silicon steel.
A closed magnetic circuit is formed by the electromagnetic chuck 4, the lower magnetic conducting core 7, the armature 5, the upper magnetic conducting core 8, the magnetic conducting rod 10 and the magnetic conducting base 9. The upper magnetic core 8 and the armature 5 are contacted in a matched manner through the shaft hole 13, H8/f7 is matched, and the lower magnetic core 7 and the armature 5 are contacted intermittently through the movement of the armature 5. The lower housing 1 is provided with a screw joint 11 connected with an external air supply system.
The upper shell 3 and the lower shell 1 are respectively provided with a through hole and a threaded hole, the threaded holes are internally provided with bolts 12, and the bolts 12 penetrate through the through holes and are in threaded connection with the threaded holes so as to connect the upper shell 3 with the lower shell 1 in a threaded manner, and the upper shell 3 and the lower shell 1 form a high-pressure chamber.
The lower magnetic conducting core 7 and the upper magnetic conducting core 8 are respectively connected with the lower shell 1 and the upper shell 3 in a threaded manner, the upper magnetic conducting core 8 is provided with a shaft hole 13, the armature 5 is arranged in the shaft hole 13 and moves axially along the shaft hole 13, the center of the armature 5 is penetrated and provided with a balance air hole 14, a sealing ring 15 is arranged between the lower magnetic conducting core 7 and the upper magnetic conducting core 8, and the sealing ring 15 is an O-shaped ring.
The diaphragm 2 to be measured is provided with a central hole 16, the central hole 16 and the excircle of the corresponding position of the armature 5 are in clearance fit, and the diaphragm 2 to be measured is positioned between the armature 5 and the armature nut 6 and is clamped by the armature 5 and the armature nut 6, so that the armature 5 and the diaphragm 2 to be measured are fixedly connected into a whole.
The diaphragm 2 to be tested adopts a hollow fin 17 structure, in addition, the fin 17 is calculated to ensure that the maximum stress is at the position of the fin 17 close to the root fillet, and is approximately equal stress area, so that the strain can be conveniently measured during debugging, and the influence of local stress concentration on a test result is avoided by the fillet designed at the root of the fin 17.
When the electromagnetic chuck 4 is not magnetized, an end face gap exists between the armature 5 and the lower magnetic conducting core 7, the gap is smaller than 1mm, the end face gap is the only breakpoint in the closed magnetic circuit, after the electromagnetic chuck 4 is magnetized, the armature 5 moves towards the lower magnetic conducting core 7 under the action of magnetic field force, so that the magnetic circuit is closed, and then the diaphragm 2 to be measured is driven to deform, and bending stress is generated.
After the electromagnetic chuck 4 demagnetizes, the armature 5 moves in the opposite direction before the elastic restoring force of the diaphragm 2 to be measured acts, the diaphragm 2 to be measured and the armature 5 form a spring-mass system, and the electromagnetic chuck 4 provides an alternating exciting force.
When the magnetic field change frequency is matched with the natural frequency of the spring-mass system, the system realizes resonance, at the moment, the armature 5 can be ensured to move to the upper and lower dead points, the symmetrical deformation of the diaphragm 2 to be tested in one period is realized, and the fatigue test meeting different stress levels can be realized by controlling the positions of the upper and lower dead points on the mechanical dimension.
Example 2:
as shown in fig. 1 and 4, unlike embodiment 1, the upper magnetic core 8 and the lower magnetic core 7 in this embodiment are provided with shaft holes 13, and the upper and lower ends of the armature 5 are respectively matched with the shaft holes 13 of the upper magnetic core 8 and the lower magnetic core 7, so that a more stable reciprocating motion can be realized, and the problems of skew and jamming in the whole life test period of the armature 5 can be avoided.
In order to ensure that the system can have an initial magnetic gap before the electromagnetic chuck 4 is magnetized, namely that a magnetic field is not shorted, a guide bushing 18 is arranged between the upper magnetic conducting core 8 and the armature 5, the guide bushing 18 is made of non-magnetic conducting materials, such as self-lubricating capability or wear-resistant nonmetallic materials, such as PTFE, PEEK and the like, the guide bushing 18 and the upper magnetic conducting core 8 are in interference fit, mutual separation is not ensured, and a gap shaft hole 13 is adopted between the guide bushing 18 and the armature 5 to form movement guide of the armature 5. The initial end gap between the armature 5 and the upper magnetically permeable core 8 is less than 1mm.
In order to improve the rigidity of the spring-mass system and realize higher resonant frequency, a spring cavity is formed on the upper magnetic core 8, a spiral spring 19 is arranged in the upper magnetic core, and the spiral spring 19 is made of austenitic stainless steel materials so as to avoid magnetic field short circuit. The coil spring 19 can pre-compress the armature 5 by a pre-tightening force at the bottom dead center.
The foregoing describes in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the invention by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.
Claims (7)
1. The utility model provides an electromagnetic excitation formula diaphragm compressor diaphragm hydrogen environment life test device, includes life test device body, electromagnetic chuck controller and outside air feed system, and electromagnetic chuck controller and outside air feed system set up respectively in the both sides of life test device body, and outside air feed system passes through high-pressure air supply pipe and is connected with life test device body, its characterized in that, life test device body includes lower casing (1), await measuring diaphragm (2), last casing (3), electromagnetic chuck (4), armature (5), armature nut (6), lower magnetic conduction core (7), go up magnetic conduction core (8), magnetic conduction base (9) and magnetic conduction stick (10), and last casing (3) are connected with dismantling of lower casing (1);
the lower magnetic conducting core (7) is detachably connected with the lower shell (1), the upper magnetic conducting core (8) is detachably connected with the upper shell (3), a shaft hole (13) is formed in the upper magnetic conducting core (8), the armature (5) is arranged in the shaft hole (13) and moves axially along the shaft hole (13), and a sealing ring (15) is arranged between the lower magnetic conducting core (7) and the upper magnetic conducting core (8);
a threaded interface (11) connected with an external air supply system is arranged on the lower shell (1);
a balance air hole (14) is formed in the center of the armature (5) in a penetrating manner;
a central hole (16) is formed in the diaphragm (2) to be tested, the central hole (16) is in clearance fit with the outer circle of the corresponding position of the armature (5), the diaphragm (2) to be tested is positioned between the armature (5) and the armature nut (6) and is clamped by the armature (5) and the armature nut (6), and the armature (5) and the diaphragm (2) to be tested are fixedly connected into a whole; the lower shell (1) and the upper shell (3) are connected through bolts, are sealed through O-shaped rings, and are respectively sealed with the diaphragm (2) to be tested through end face O-shaped rings; the diaphragm (2) to be tested is pressed and positioned by the upper shell (3) and the lower shell (1), so that the constraint purpose of the edge of the outer circular edge of the diaphragm (2) to be tested is realized;
electromagnetic chuck (4), lower magnetic conduction core (7) pass through end surface contact, upper casing (3) and lower casing (1) setting are encircled to magnetic conduction stick (10), magnetic conduction stick (10) one end with upper magnetic conduction core (8) contact, the other end with magnetic conduction base (9) contact, magnetic conduction base (9) and electromagnetic chuck (4) end surface contact, armature (5), upper magnetic conduction core (8), magnetic conduction stick (10), magnetic conduction base (9), electromagnetic chuck (4) contact in proper order in order so as to form closed magnetic circuit.
2. The hydrogen environment life test device for the diaphragm of the electromagnetic excitation diaphragm compressor according to claim 1, wherein shaft holes (13) are formed in the upper magnetic conducting core (8) and the lower magnetic conducting core (7).
3. The hydrogen environment life test device for the diaphragm of the electromagnetic excitation diaphragm compressor according to claim 1, wherein the sealing ring (15) is an O-shaped ring.
4. The hydrogen environment life test device for the diaphragm of the electromagnetic excitation diaphragm compressor according to claim 1, wherein the diaphragm (2) to be tested is provided with fins (17), and the fins (17) are provided with round root parts.
5. The hydrogen environment life test device for the diaphragm of the electromagnetic excitation diaphragm compressor according to claim 1, wherein a guide bushing (18) is arranged between the upper magnetic core (8) and the armature (5).
6. The hydrogen environment life test device for the diaphragm of the electromagnetic excitation diaphragm compressor according to claim 5, wherein the guide bushing (18) is in interference fit with the upper magnetic conducting core (8).
7. The hydrogen environment life test device for the diaphragm of the electromagnetic excitation diaphragm compressor according to claim 6, wherein a coil spring (19) is arranged in the upper magnetic conductive core (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211533075.7A CN116181632B (en) | 2022-12-01 | 2022-12-01 | Electromagnetic excitation type diaphragm compressor diaphragm hydrogen environment life test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211533075.7A CN116181632B (en) | 2022-12-01 | 2022-12-01 | Electromagnetic excitation type diaphragm compressor diaphragm hydrogen environment life test device |
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| Publication Number | Publication Date |
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| CN116181632A CN116181632A (en) | 2023-05-30 |
| CN116181632B true CN116181632B (en) | 2023-10-13 |
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| CN202211533075.7A Active CN116181632B (en) | 2022-12-01 | 2022-12-01 | Electromagnetic excitation type diaphragm compressor diaphragm hydrogen environment life test device |
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| CN110073190A (en) * | 2019-02-21 | 2019-07-30 | 西安交通大学 | Oil pressure monitoring apparatus and method in a kind of membrane compresses Oil cylinder |
| CN112781812A (en) * | 2019-11-01 | 2021-05-11 | 上海羿弓氢能科技有限公司 | Fatigue testing method for metal diaphragm of diaphragm compressor |
| CN217237461U (en) * | 2022-02-24 | 2022-08-19 | 福建福清核电有限公司 | Stroke-adjustable pneumatic actuator diaphragm fatigue test device |
| CN115406781A (en) * | 2022-08-12 | 2022-11-29 | 上海羿弓氢能科技有限公司 | A life test device for diaphragm compressor diaphragm |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10697447B2 (en) * | 2014-08-21 | 2020-06-30 | Fenwal, Inc. | Magnet-based systems and methods for transferring fluid |
-
2022
- 2022-12-01 CN CN202211533075.7A patent/CN116181632B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007103019A (en) * | 2005-09-30 | 2007-04-19 | Nippon Sheet Glass Co Ltd | Method of testing oxidation resistance life of fiber glass separator for lead storage battery |
| JP2007222727A (en) * | 2006-02-22 | 2007-09-06 | Sony Corp | Vibration actuator and jet generator |
| CN204536138U (en) * | 2015-03-19 | 2015-08-05 | 天津航天瑞莱科技有限公司苏州分公司 | The mutual pressure test device of micro-air pressure of ultra-thin diaphragm |
| CN110073190A (en) * | 2019-02-21 | 2019-07-30 | 西安交通大学 | Oil pressure monitoring apparatus and method in a kind of membrane compresses Oil cylinder |
| CN112781812A (en) * | 2019-11-01 | 2021-05-11 | 上海羿弓氢能科技有限公司 | Fatigue testing method for metal diaphragm of diaphragm compressor |
| CN217237461U (en) * | 2022-02-24 | 2022-08-19 | 福建福清核电有限公司 | Stroke-adjustable pneumatic actuator diaphragm fatigue test device |
| CN115406781A (en) * | 2022-08-12 | 2022-11-29 | 上海羿弓氢能科技有限公司 | A life test device for diaphragm compressor diaphragm |
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