CN112444383A - Test bed for measuring reliability of mechanical seal metal corrugated pipe - Google Patents
Test bed for measuring reliability of mechanical seal metal corrugated pipe Download PDFInfo
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- CN112444383A CN112444383A CN202011471156.XA CN202011471156A CN112444383A CN 112444383 A CN112444383 A CN 112444383A CN 202011471156 A CN202011471156 A CN 202011471156A CN 112444383 A CN112444383 A CN 112444383A
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- 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
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Abstract
The invention provides a test bed for measuring the reliability of a mechanical seal metal corrugated pipe, which comprises a test bed body, and a clamping centering device and a heating sealing device which are arranged on the test bed body and can be replaced. When the simulated corrugated pipe runs in a mechanical seal, not only the micro vibration is considered, but also the working environment of high temperature and high pressure is simulated, and the more accurate measurement result is ensured; the clamping centering device can adjust the diameter and the height of the corrugated pipes with different sizes, so that the stability of the corrugated pipes during damage accumulation tests is ensured; the design of heating sealing device has split type outer cabin mechanism, and outer cabin body dismantles conveniently, and the change and the holistic dismantlement of the inside medium of being convenient for collocation constant temperature mechanism can imitate mechanical seal bellows actual operating environment furthest.
Description
Technical Field
The invention belongs to the field of measurement test devices, and particularly relates to a test bed for measuring the reliability of a mechanical seal metal corrugated pipe.
Background
In order to measure the life and reliability of mechanically sealed bellows, the metal bellows is typically stress relaxed by adding a fixed load. However, the mechanical seal welding metal corrugated pipe is operated under the condition of coexistence of high-frequency micro vibration and stress relaxation, and has the influence of high pressure, high temperature and liquid medium, and the service life and reliability of the corrugated pipe cannot be correctly reflected by considering the condition of a fixed load alone. Many bellows acceleration test devices today do not take these effects into account.
Therefore, it is an urgent problem for those skilled in the art to develop a device capable of simulating the actual environment in the mechanical seal and performing a measurement test on the corrugated pipe.
Disclosure of Invention
In order to solve the problems, the invention discloses a test bed for measuring the reliability of a mechanical seal metal corrugated pipe.
In order to achieve the purpose, the invention provides the following technical scheme:
a test bed for measuring the reliability of a mechanical seal metal corrugated pipe comprises a test bed body, a clamping centering device and a heating sealing device, wherein the clamping centering device and the heating sealing device are arranged on the test bed body in a replaceable manner; the test bed body comprises an upper bottom plate and a lower bottom plate which are arranged in parallel up and down, a supporting column and a loading device, wherein the supporting column penetrates through the upper bottom plate and the lower bottom plate from top to bottom in sequence and is fixed; the middle part of the lower bottom plate is provided with a bottom plate mounting groove; the loading device comprises a telescopic mechanism and a pressing plate; the telescopic mechanism is vertically and downwards arranged in the middle of the upper bottom plate; the pressing plate is detachably and horizontally arranged at the bottom of the telescopic mechanism;
the clamping centering device comprises a screw rod, a nut seat, a V-shaped block and a workbench; the screw rod is a positive and negative spiral linear guide rail screw rod and is horizontally arranged in the mounting groove of the bottom plate; the number of the nut seats is two, the nut seats are respectively installed at two ends of the screw rod in a matching mode, and relative movement is achieved through rotation of the screw rod; the number of the V-shaped blocks is two, and the two V-shaped blocks are respectively connected above the two nut seats; the working rack is arranged at the upper part of the bottom plate mounting groove and is positioned between the two V-shaped blocks;
the heating sealing device comprises a split type outer cabin mechanism and a constant temperature mechanism; the split type outer cabin mechanism comprises an outer cabin body, a rigid plate and heat insulation cotton; the outer chamber body is of a columnar chamber body structure; the rigid plate is arranged at the opening at the top of the outer cabin body in a matching way; the heat insulation cotton is fixed on the bottom side of the rigid plate; the constant temperature mechanism comprises a heating device, an alternating current contactor, a temperature controller and a temperature sensor which are sequentially connected in series; the heating device and the temperature sensor are respectively arranged on two sides of the interior of the outer cabin body; alternating current contactor and temperature controller all set up in the outside of nacelle body.
The invention provides a test bed for measuring the reliability of a mechanical seal metal corrugated pipe, which comprises a test bed body, a clamping centering device and a heating sealing device, wherein the test bed body is used for supporting and placing the corrugated pipe to be tested and the test device. The test bed body comprises an upper base plate and a lower base plate which are arranged in parallel from top to bottom, the upper base plate and the lower base plate are fixedly installed through supporting columns, the loading device comprises a telescopic mechanism and a pressing plate, the pressing plate is vertically installed downwards at the middle of the upper base plate through the telescopic mechanism, the pressing plate is driven to move up and down through the telescopic mechanism, and the pressing plate is detachably installed at the bottom of the telescopic mechanism and is convenient to replace.
The clamping centering device comprises a screw rod, a nut seat, a V-shaped block and a workbench; the screw rod is selected as a positive and negative spiral linear guide rail screw rod, the number of the nut seats is two, the nut seats are respectively matched and installed at two ends of the screw rod, relative approach and the principle are realized through the rotation of the screw rod, and the adjustment is carried out according to the diameter of the corrugated pipe to be tested; the two V-shaped blocks are respectively connected above the two nut seats and used for clamping the corrugated pipe to be tested along with the movement of the nut seats; the work bench is arranged on the upper part of the bottom plate mounting groove and is positioned between the two V-shaped blocks for placing the corrugated pipe.
The heating sealing device comprises a split type outer cabin mechanism and a constant temperature mechanism, wherein the split type outer cabin mechanism comprises an outer cabin body in a columnar cabin body structure, a rigid plate covering an opening at the top of the outer cabin body and heat insulation cotton fixed on the bottom side of the rigid plate, so that the overall sealing performance of the device is ensured, and the effects of primary heat insulation and medium leakage prevention are achieved. The constant temperature mechanism comprises a heating device, an alternating current contactor, a temperature controller and a temperature sensor which are sequentially connected in series, and is used for ensuring the stability of the system temperature.
Further, the rigid plate is also detachably and horizontally arranged at the bottom of the telescopic mechanism.
The rigid plate of the heating sealing device is also detachably and horizontally arranged at the bottom of the telescopic mechanism, so that after the pressing plate is detached, the rigid plate is arranged at the bottom of the telescopic mechanism and moves up and down along with the telescopic mechanism, and replacement is facilitated.
Further, the telescopic mechanism comprises an electric cylinder and a servo motor; the electric cylinder is vertically and downwards arranged in the middle of the upper bottom plate; the servo motor is matched and installed with the electric cylinder; the surface of the workbench is also sequentially provided with a pressure sensor and a placing plate upwards; the bottom of the lower bottom plate is also provided with a displacement sensor; the pressure sensor and the displacement sensor are also connected with the servo motor in a matching way.
Further, the electric cylinder is a DDA80 electric cylinder.
The telescopic mechanism comprises an electric cylinder and a servo motor, wherein the electric cylinder is a DDA80 electric cylinder and is driven by the controllable servo motor to move up and down for telescopic movement; the workstation surface still is equipped with pressure sensor and places the board, and pressure sensor is connected with the servo motor cooperation equally, and when the clamp plate pushed down along with electronic jar, will treat that experimental bellows compresses tightly on placing the board to through pressure sensor real-time supervision pressure size, and feed back to electronic jar through servo motor, control it and continue to push down or suspend and push down.
Furthermore, telescopic clamping blocks capable of moving up and down are further arranged at two ends of the top of the V-shaped block; the telescopic clamping block is fixed through a locking nail; the locking nail is arranged on the side surface of the V-shaped block.
The two ends of the top of the V-shaped block are provided with telescopic clamping blocks which can move up and down to adapt to corrugated pipes with different heights, and the telescopic clamping blocks are locked and fixed through locking nails.
Further, the outer cabin body comprises two symmetrical outer cabin single bodies and a sealing strip; the two outer cabin monomers are spliced into a columnar cabin body structure; the sealing strip is a silica gel sealing strip and is attached to the joint of the two outer cabin monomers.
The outer chamber body comprises two outer chamber monomers and a sealing strip which are symmetrically designed, the two outer chamber monomers are spliced into a columnar chamber body structure, the sealing strip is attached to the joint of the two outer chamber monomers in a matching mode to jointly form the outer chamber body, the outer chamber body is convenient to disassemble, and meanwhile the sealing strip selects the silica gel sealing strip, so that the inner medium can be effectively prevented from leaking, the height of 230 ℃ can be borne, and smooth experiment is guaranteed.
Furthermore, a circle of heat insulation plate is sleeved on the surface of the outer cabin body along the circumferential direction of the outer cabin body; the heat insulation plate is a ceramic fiber heat insulation plate.
According to the invention, the surface of the outer cabin body is sleeved with a circle of heat insulation plate along the circumferential direction, and the ceramic fiber heat insulation plate is used, so that the fireproof heat insulation performance is excellent, and the continuous use can bear the high temperature of 1000 ℃.
Furthermore, the bottom of the rigid plate is also provided with a lifting pressure head downwards.
Further, the heating device is a quartz heating pipe; the alternating current contactor is a CJX 2-1201 alternating current contactor; the temperature control instrument is an XMTD-9411 temperature control instrument; the temperature sensor is a PT100 temperature sensor.
The heating sealing device is used for heating a medium, and a quartz heating pipe is selected because the experiment time is long, the experiment temperature is high, the high chemical stability is required at high temperature, and the service life is long; the alternating current contact controller selects an alternating current contactor with the model number of CJX 2-1201 and controls the on-off of a heating tube circuit; the temperature controller is an XMTD-9411 temperature controller, has the precision of +/-1% of a full range, and is used for displaying the temperature of the temperature sensor and regulating and controlling the temperature of the system;
the temperature sensor is a PT100 temperature sensor, the temperature measuring range is-100 to + 200 ℃, the electric conductivity is large, the heat capacity is small, the response speed is high, the resistance and the temperature are almost in a linear relation, and the precision is high and stable.
Furthermore, the bottom of the supporting column is also provided with a universal wheel capable of braking; the bottom of the lower bottom plate is downwards provided with a support frame.
The bottom of the support column is also provided with a universal wheel capable of braking, so that the whole test bed can be conveniently moved and has good stability, and meanwhile, the bottom of the lower bottom is also provided with a support frame downwards so as to improve the stability of the whole test bed.
Compared with the prior art, the invention has the following beneficial effects:
1. when the simulated corrugated pipe runs in a mechanical seal, not only the micro vibration is considered, but also the working environment of high temperature and high pressure is simulated, and the more accurate measurement result is ensured;
2. the clamping centering device can adjust the diameter and the height of the corrugated pipes with different sizes, so that the stability of the corrugated pipes during damage accumulation tests is ensured;
3. the design of heating sealing device has split type outer cabin mechanism, and outer cabin body dismantles conveniently, and the change and the holistic dismantlement of the inside medium of being convenient for collocation constant temperature mechanism can imitate mechanical seal bellows actual operating environment furthest.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a clamping centering device according to the present invention;
fig. 3 is a schematic structural view of the heat sealing device of the present invention.
List of reference numerals: the device comprises an upper bottom plate 1, a lower bottom plate 2, support columns 3, a telescopic mechanism 4, a screw rod 5, a nut seat 6, a V-shaped block 7, a workbench 8, an outer cabin body 9, a rigid plate 10, heat insulation cotton 11, a heating device 12, a temperature sensor 13, an electric cylinder 41, a servo motor 42, a pressure sensor 14, a placing plate 15, a handle 16, a telescopic clamping block 17, a locking nail 18, a sealing strip 19, a heat insulation plate 20, a braking universal wheel 21, a support frame 22, a pressure plate 23, a displacement sensor 24 and a lifting pressure head 25.
Detailed Description
The technical solutions provided by the present invention will be described in detail below with reference to specific examples, and it should be understood that the following specific embodiments are only illustrative of the present invention and are not intended to limit the scope of the present invention.
Fig. 1 is a schematic structural diagram of the present invention, which is a test bed for measuring reliability of a mechanical seal metal corrugated pipe, and the present invention includes a test bed body, a clamping centering device and a heating sealing device, which are arranged on the test bed body and can be replaced.
The test bed body comprises an upper base plate 1 and a lower base plate 2 which are arranged in parallel up and down, a support column 3 which sequentially penetrates through the upper base plate 1 and the lower base plate 2 from top to bottom and is fixed, and a loading device; the middle part of the lower bottom plate 2 is provided with a bottom plate mounting groove; the bottom of the supporting column 3 is also provided with a universal wheel 21 capable of braking; the bottom of the lower bottom plate 2 is downwards provided with a support frame 22; the loading device comprises a telescopic mechanism 4 and a pressing plate 23; the telescopic mechanism 4 is vertically and downwards arranged in the middle of the upper bottom plate 1; the pressing plate 23 is detachably mounted horizontally at the bottom of the telescopic mechanism 4. The telescopic mechanism 4 comprises an electric cylinder 41 and a servo motor 42; the electric cylinder 41 is vertically and downwards arranged in the middle of the upper bottom plate 1; the servo motor 42 is matched and installed with the electric cylinder 41; the bottom of the lower bottom plate 2 is also provided with a displacement sensor 24, and the displacement sensor 24 is connected with a servo motor 42 in a matching way.
The electric cylinder 41 is a DDA80 electric cylinder, and the servo motor 42 adopts a loose servo motor MSMF152L1G6M + MDDLN55SG/3 meter line.
As shown in fig. 2, the clamping centering device comprises a screw rod 5, a nut seat 6, a V-shaped block 7 and a workbench 8; the screw rod 5 is a screw rod with a positive and negative spiral linear guide rail, is horizontally arranged in the mounting groove of the bottom plate, and the end part of the screw rod is also provided with a handle 16 in a matching way; the number of the nut seats 6 is two, the nut seats are respectively matched and arranged at two ends of the screw rod 5, and relative motion is realized through rotation of the screw rod 5; the number of the V-shaped blocks 7 is two, the two V-shaped blocks are respectively connected above the two nut seats 6, and two ends of the top of each V-shaped block 7 are also provided with telescopic clamping blocks 17 capable of moving up and down; the telescopic clamping block 17 is fixed by a locking nail 18; the locking nail 18 is arranged on the side surface of the V-shaped block 7; the workbench 8 is erected at the upper part of the bottom plate mounting groove and is positioned between the two V-shaped blocks 7; the surface of the worktable 8 is also provided with a pressure sensor 14 and a placing plate 15 in turn upwards, and the pressure sensor 14 is also connected with a servo motor 42 in a matching way.
As shown in fig. 3, the heating and sealing device includes a split type outer chamber mechanism and a constant temperature mechanism; the split type outer cabin mechanism comprises an outer cabin body 9, a rigid plate 10 and heat insulation cotton 11; the outer chamber body 9 is a columnar chamber body structure and comprises two symmetrical outer chamber single bodies and a sealing strip 19; the two outer cabin monomers are spliced into a columnar cabin body structure; a circle of heat insulation plates 20 are sleeved on the surface of the outer cabin body 9 along the circumferential direction of the outer cabin body; the heat insulation plate 20 is a ceramic fiber heat insulation plate; the sealing strip 19 is a silica gel sealing strip and is attached to the joint of the two outer cabin monomers; the rigid plate 10 is also detachably and horizontally arranged at the bottom of the telescopic mechanism 4 and is placed at the opening at the top of the outer cabin body 9 in a matching way, and a lifting pressure head 25 is further downwards arranged at the bottom of the rigid plate 10; the heat insulation cotton 11 is fixed on the bottom side of the rigid plate 10; the constant temperature mechanism comprises a heating device 12, an alternating current contactor, a temperature controller and a temperature sensor 13 which are sequentially connected in series; the heating device 12 and the temperature sensor 13 are respectively arranged at two sides of the interior of the outer cabin body 9; the ac contactor and the temperature controller are both disposed outside the outer chamber body 9.
The heating device 12 is a quartz heating pipe; the alternating current contactor is a CJX 2-1201 alternating current contactor; the temperature control instrument is an XMTD-9411 temperature control instrument; the temperature sensor 13 is a PT100 temperature sensor.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all the modifications and equivalent substitutions should be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a test bench that is used for mechanical seal metal bellows reliability measurement which characterized in that: the test bed comprises a test bed body, a clamping centering device and a heating sealing device, wherein the clamping centering device and the heating sealing device are arranged on the test bed body and can be replaced; the test bed body comprises an upper base plate (1) and a lower base plate (2) which are arranged in parallel up and down, a support column (3) which sequentially penetrates through the upper base plate (1) and the lower base plate (2) from top to bottom and is fixed, and a loading device; a bottom plate mounting groove is formed in the middle of the lower bottom plate (2); the loading device comprises a telescopic mechanism (4) and a pressing plate (23); the telescopic mechanism (4) is vertically and downwards arranged in the middle of the upper bottom plate (1); the pressing plate (23) is detachably and horizontally arranged at the bottom of the telescopic mechanism (4);
the clamping centering device comprises a screw rod (5), a nut seat (6), a V-shaped block (7) and a workbench (8); the screw rod (5) is a positive and negative spiral linear guide rail screw rod and is horizontally arranged in the mounting groove of the bottom plate; the number of the nut seats (6) is two, the nut seats are respectively matched and arranged at two ends of the screw rod (5), and relative motion is realized through rotation of the screw rod (5); the number of the V-shaped blocks (7) is two, and the two V-shaped blocks are respectively connected above the two nut seats (6); the workbench (8) is erected at the upper part of the bottom plate mounting groove and is positioned between the two V-shaped blocks (7);
the heating sealing device comprises a split type outer cabin mechanism and a constant temperature mechanism; the split type outer cabin mechanism comprises an outer cabin body (9), a rigid plate (10) and heat insulation cotton (11); the outer cabin body (9) is of a columnar cabin body structure; the rigid plate (10) is arranged at the opening at the top of the outer cabin body (9) in a matching way; the heat insulation cotton (11) is fixed on the bottom side of the rigid plate (10); the constant temperature mechanism comprises a heating device (12), an alternating current contactor, a temperature controller and a temperature sensor (13) which are sequentially connected in series; the heating device (12) and the temperature sensor (13) are respectively arranged on two sides of the interior of the outer cabin body (9); the alternating current contactor and the temperature controller are both arranged outside the outer cabin body (9).
2. The test bench for reliability measurement of mechanical seal metal bellows according to claim 1, wherein: the rigid plate (10) is also detachably and horizontally arranged at the bottom of the telescopic mechanism (4).
3. The test bench for reliability measurement of the mechanical seal metal corrugated pipe according to claim 2, characterized in that: the telescopic mechanism (4) comprises an electric cylinder (41) and a servo motor (42); the electric cylinder (41) is vertically and downwards arranged in the middle of the upper bottom plate (1); the servo motor (42) is matched and installed with the electric cylinder (41); the surface of the workbench (8) is also sequentially provided with a pressure sensor (14) and a placing plate (15) upwards; a displacement sensor (24) is also arranged at the bottom of the lower bottom plate (2); the pressure sensor (14) and the displacement sensor (24) are also connected with the servo motor (42) in a matching way.
4. A test bench for reliability measurement of mechanically sealed metal bellows according to claim 3, wherein: the electric cylinder (41) is a DDA80 electric cylinder.
5. The test bench for reliability measurement of mechanical seal metal bellows according to claim 1, wherein: and a handle (16) is also arranged at the end part of the screw rod (5) in a matching way.
6. The test bench for reliability measurement of mechanical seal metal bellows according to claim 1, wherein: two ends of the top of the V-shaped block (7) are also provided with telescopic clamping blocks (17) which can move up and down; the telescopic clamping block (17) is fixed through a locking nail (18); the locking nail (18) is arranged on the side surface of the V-shaped block (7).
7. The test bench for reliability measurement of mechanical seal metal bellows according to claim 1, wherein: the outer cabin body (9) comprises two symmetrical outer cabin single bodies and a sealing strip (19); the two outer cabin monomers are spliced into a columnar cabin body structure; a circle of heat insulation plates (20) are sleeved on the surface of the outer cabin body (9) along the circumferential direction of the outer cabin body; the heat insulation plate (20) is a ceramic fiber heat insulation plate; the sealing strip (19) is a silica gel sealing strip and is attached to the joint of the two outer cabin monomers.
8. The test bench for reliability measurement of mechanical seal metal bellows according to claim 1, wherein: and a lifting pressure head (25) is also arranged at the bottom of the rigid plate (10) downwards.
9. The test bench for reliability measurement of mechanical seal metal bellows according to claim 1, wherein: the heating device (12) is a quartz heating pipe; the alternating current contactor is a CJX 2-1201 alternating current contactor; the temperature control instrument is an XMTD-9411 temperature control instrument; the temperature sensor (13) is a PT100 temperature sensor.
10. The test bench for reliability measurement of mechanical seal metal bellows according to claim 1, wherein: the bottom of the supporting column (3) is also provided with a braking universal wheel (21); and a support frame (22) is arranged at the bottom of the lower bottom plate (2) downwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011471156.XA CN112444383A (en) | 2020-12-15 | 2020-12-15 | Test bed for measuring reliability of mechanical seal metal corrugated pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011471156.XA CN112444383A (en) | 2020-12-15 | 2020-12-15 | Test bed for measuring reliability of mechanical seal metal corrugated pipe |
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| CN112444383A true CN112444383A (en) | 2021-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011471156.XA Pending CN112444383A (en) | 2020-12-15 | 2020-12-15 | Test bed for measuring reliability of mechanical seal metal corrugated pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112237A (en) * | 2021-11-18 | 2022-03-01 | 浙江宝森波纹管有限公司 | Metal corrugated pipe load life testing device and implementation method thereof |
| CN114441325A (en) * | 2021-12-29 | 2022-05-06 | 南京林业大学 | Method for detecting reliability of mechanical seal welding metal corrugated pipe |
-
2020
- 2020-12-15 CN CN202011471156.XA patent/CN112444383A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112237A (en) * | 2021-11-18 | 2022-03-01 | 浙江宝森波纹管有限公司 | Metal corrugated pipe load life testing device and implementation method thereof |
| CN114112237B (en) * | 2021-11-18 | 2024-04-23 | 浙江宝森波纹管有限公司 | Metal corrugated pipe load life testing device and implementation method thereof |
| CN114441325A (en) * | 2021-12-29 | 2022-05-06 | 南京林业大学 | Method for detecting reliability of mechanical seal welding metal corrugated pipe |
| CN114441325B (en) * | 2021-12-29 | 2023-11-28 | 南京林业大学 | Reliability detection method for mechanical seal welded metal corrugated pipe |
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