CN218444466U - Accelerated verification testing machine for service life of shaft seal - Google Patents
Accelerated verification testing machine for service life of shaft seal Download PDFInfo
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- CN218444466U CN218444466U CN202221184804.8U CN202221184804U CN218444466U CN 218444466 U CN218444466 U CN 218444466U CN 202221184804 U CN202221184804 U CN 202221184804U CN 218444466 U CN218444466 U CN 218444466U
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- shaft seal
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Abstract
The utility model relates to a shaft seal life-span proof test machine with higher speed, include: oil chamber, main shaft, vacuum chamber, bearing seal subassembly, direct current brushless motor. The utility model discloses a set up oil cavity room and vacuum chamber, and guarantee pressure balance through the air flue between oil cavity room and vacuum chamber, set up the inner wall of oil cavity room into ramp type, thereby be favorable to lubricating oil to slide into the bearing smoothly through dividing oil pan centrifugal motion, bearing accessible waveform shell fragment adjustment axle clearance, the vacuum chamber adopts the labyrinth form with the oil cavity room is sealed, but quick replacement different kind bearing seal is verified, it is unqualified to have eliminated the bearing seal supplied materials, the pump body maintenance that significantly reduces, the operation cost, the reliability and the life of the pump body have been improved.
Description
Technical Field
The utility model relates to a mechanical vacuum seal technical field, in particular to seal life-span proof testing machine with higher speed.
Background
In the mechanical vacuum industry, especially in the mechanical equipment with sealing requirements, a large amount of shaft seals are needed to achieve the sealing effect, the sealing function and the service life of the shaft seals are very high in requirements, such as the shaft seals are short in service life, the sealing is seriously affected, the working medium loss is caused, the operation environment is deteriorated, the grease is deteriorated, the air leakage breaks the vacuum, the air exhaust load is increased, the working efficiency of a pump body is reduced, the system maintenance cost is increased, the environment is polluted, the service life of incoming materials cannot be inspected by the shaft seals at present, the subsequent performance of the pump body is greatly affected, and the maintenance cost is increased.
The design requirements of the sealing system on pressure difference, speed, materials, temperature and the like are very high, but an effective technical means for verifying the service life of the shaft seal is still lacked. Prior art CN109900468A discloses a rubber and plastic shaft seal performance monitoring and accelerated life test platform, comprising: the system comprises an electrical control system, a medium pressure and temperature control system and a performance parameter monitoring system. The platform obtains the service life value of the rubber-plastic shaft seal under a certain working condition, and carries out on-line monitoring on the performance parameters of the rubber-plastic shaft seal to obtain a performance parameter degradation rule; meanwhile, the three working variables of the oil temperature, the pressure of the sealing cavity and the speed of the rotating shaft can be accurately controlled, so that the accelerated life test of the rubber-plastic shaft seal is carried out. Prior art CN112525514A discloses a secondary seal life verification testing machine of a nuclear main pump shaft seal, which comprises: the vibration device comprises a vibration host, a connecting disc, an actuator and a force measuring sensor which are installed on the connecting disc, a double-groove static ring seat located above the force measuring sensor, and an insertion piece installed on an output shaft of the actuator. The testing machine is used for carrying out accelerated wear test on the fretting wear condition of the groove-shaped seal under the condition close to the real use condition, and analyzing the service life condition of the groove-shaped seal by researching the wear state after the test. However, the test equipment has a complex structure, and different types of shaft seals cannot be rapidly replaced for verification.
How to overcome above-mentioned prior art scheme not enough, how to provide a shaft seal life-span and accelerate verification test machine, can simulate operating condition, the life-span of aassessment bearing seal, quick replacement different kind bearing seal is verified, eliminates bearing seal material disqualification, reduces pump body maintenance, operation cost, improves the reliability and the life of the pump body, becomes the subject that this technical field waited to solve urgently.
SUMMERY OF THE UTILITY MODEL
For overcoming the not enough of above-mentioned prior art, the utility model provides a shaft seal life-span proof test machine with higher speed specifically adopts following technical scheme:
the utility model provides a shaft seal life-span proof test machine with higher speed which characterized in that, shaft seal life-span proof test machine with higher speed includes: the device comprises an oil chamber, a main shaft, a vacuum chamber, a shaft seal assembly and a direct current brushless motor;
the oil chamber comprises a first bearing fixing plate and a second bearing fixing plate which are fixedly connected with each other, a first lubricating oil cavity is arranged in the first bearing fixing plate, and a second lubricating oil cavity is arranged in the second bearing fixing plate; the first lubricating oil cavity and the second lubricating oil cavity are the same truncated cone-shaped cavities with slopes, and the bottom surfaces of the two truncated cone-shaped cavities are aligned with each other; the two bearings are respectively arranged in the first bearing fixing plate and the second bearing fixing plate and are respectively aligned with the top surfaces of the truncated cone-shaped cavities of the first lubricating oil cavity and the second lubricating oil cavity; the area of the bottom surface is larger than that of the top surface;
the main shaft penetrates through the first lubricating oil cavity and the second lubricating oil cavity and is arranged on the two bearings), and an oil distribution disc is sleeved on the main shaft and is positioned at the bottom surfaces of the two truncated cone-shaped cavities;
the upper part of the vacuum chamber is provided with a vacuum interface, and one side surface of the vacuum chamber is an open end; the open end is fixedly connected with an outer flange of the first bearing fixing plate through a vacuum chamber flange, and a first sealing ring is arranged between the vacuum chamber flange and the outer flange;
the shaft seal assembly comprises a shaft seal and a shaft sleeve, the shaft seal assembly is sleeved at one end of the main shaft and detachably mounted on the outer side of the first bearing fixing plate to be in direct contact with the inner space of the vacuum chamber.
The technical scheme of the utility model the following beneficial effect has been obtained: the service life of the shaft seal is ensured to be qualified, the short service life of the shaft seal is avoided, the working efficiency of a pump body is reduced, the performance of the pump body is influenced, and the maintenance and operation cost is increased; the shaft seal and the shaft sleeve can be replaced quickly, and different types of shaft seals can be verified; the pump body has good vacuum performance and reliability, and the maintenance and operation cost is reduced; the implementation process is simple, the technology is mature, the cost is low, and the rapid verification is facilitated.
Drawings
Fig. 1 is a sectional view of the shaft seal life acceleration verification testing machine of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby. It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise. The terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left") "right", "vertical", "horizontal", "top", "bottom", "inner"),
The references to "outside" and the like are based on the orientation or positional relationship shown in the drawings and are for convenience of description only and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation and therefore should not be construed as limiting the invention.
The utility model discloses a simulation vacuum pump environment, bearing seal and axle sleeve can carry out quick replacement, verify different kind bearing seals, directly drive the main shaft through the motor and verify, confirm whether the bearing seal is qualified.
As shown in fig. 1, an accelerated testing machine for testing the service life of a shaft seal is characterized by comprising: oil chamber, main shaft 1, vacuum chamber, bearing seal subassembly, DC brushless motor 9.
The oil chamber comprises a first bearing fixing plate 5 and a second bearing fixing plate 7 which are fixedly connected with each other, a first lubricating oil cavity is arranged in the first bearing fixing plate 5, and a second lubricating oil cavity is arranged in the second bearing fixing plate 7; the first lubricating oil cavity and the second lubricating oil cavity are the same truncated cone-shaped cavities with slopes, and the bottom surfaces of the two truncated cone-shaped cavities are aligned with each other; the two bearings 3 are respectively installed inside the first bearing fixing plate 5 and the second bearing fixing plate 7 and are respectively aligned with the top surfaces of the truncated cone-shaped cavities of the first lubricating oil cavity and the second lubricating oil cavity; the area of the bottom surface is larger than that of the top surface.
The main shaft 1 penetrates through the first lubricating oil cavity and the second lubricating oil cavity and is mounted on the two bearings 3, an oil distribution disc 4 is sleeved on the main shaft 1, and the oil distribution disc 4 is located on the bottom surfaces of the two truncated cone-shaped cavities.
The upper part of the vacuum chamber is provided with a vacuum interface 10, and one side surface of the vacuum chamber is an open end; the open end is fixedly connected with an outer flange of the first bearing fixing plate 5 through a vacuum chamber flange, and a first sealing ring is arranged between the vacuum chamber flange and the outer flange.
The shaft seal assembly comprises a shaft seal 6 and a shaft sleeve 2, and is sleeved at one end of the main shaft 1 and detachably mounted on the outer side of the first bearing fixing plate 5 to be in direct contact with the inner space of the vacuum chamber.
The utility model discloses simulate the vacuum pump environment, realized pressure differential, bearing seal one side and vacuum chamber direct contact, opposite side and oil pocket chamber contact. Because the oil cavity chamber is designed to be of a slope type, lubricating oil can smoothly slide into the bearing through the cavity wall after being centrifuged by the oil distribution plate. The bearing can adjust the axial clearance through the wave-shaped elastic sheet.
Temperature sensors are respectively arranged in the vacuum chamber, the shaft seal assembly and the oil chamber, and the temperatures of the vacuum chamber, the shaft seal, the oil chamber and the like can be monitored.
The side surface of the vacuum chamber is provided with a through hole, and the nitrogen pipe is connected with the shaft seal assembly through the through hole. The shaft seal and the shaft sleeve area can be cooled by nitrogen.
The shaft seal assembly is detachably mounted on the shaft sleeve positioning ring and the shaft seal positioning ring, the shaft sleeve positioning ring and the shaft seal positioning ring are of two concentric circular ring structures, the shaft sleeve positioning ring is located inside the shaft seal positioning ring, and the shaft sleeve positioning ring and the shaft seal positioning ring are detachably mounted on the outer side of the first bearing fixing plate 5. The invention can verify various shaft seals with different inner and outer diameters and different widths by replacing the shaft sleeve positioning ring and the shaft seal positioning ring, and can be replaced quickly.
The main shaft 1 is provided with a through hole for ensuring the pressure of the vacuum chamber to be consistent with that of the lubricating oil cavity. The vacuum cavity and the lubricating oil cavity of the utility model have variable pressure and can keep differential pressure with the outside. The main shaft through hole can ensure that the pressure of the vacuum cavity is consistent with that of the lubricating oil cavity.
An oil filling port and an oil discharge port are respectively formed in the side face of the second bearing fixing plate 7, and the oil filling port and the oil discharge port are communicated with the second lubricating oil cavity.
And a labyrinth seal is arranged between the shaft seal assembly and the main shaft 1.
And cooling drain pipes are arranged on the outer sides of the first bearing fixing plate 5 and the second bearing fixing plate 7, and the cooling drain pipes comprise cooling liquid.
The brushless DC motor 9 is arranged outside the second bearing fixing plate 7 and far away from one side of the vacuum chamber, and the brushless DC motor 9 is connected with the spindle 1 through a coupler 8. The direct current brushless motor 9 adopts a Hall position sensor, is externally connected with a potentiometer stepless speed regulation interface and a forward and reverse rotation selection switch, can regulate the rotating speed and the forward and reverse rotation, and realizes the stepless speed change of 0-10000 rpm.
An oil mirror is arranged on the side surface of the oil cavity and used for observing the liquid level of the lubricating oil, so that the amount of the lubricating oil and the running time can be monitored; the oil chamber is designed with an oil mirror, so that the oil height can be ensured.
The utility model discloses can simulate operating condition, the life-span of aassessment bearing seal. Through setting up oil cavity and vacuum chamber to guarantee pressure balance through the air flue between oil cavity and vacuum chamber, set up the inner wall of oil cavity into ramp type, thereby be favorable to lubricating oil to slide into the bearing smoothly through dividing oil pan centrifugal motion, bearing accessible waveform shell fragment adjustment axial clearance, vacuum chamber and the sealed labyrinth form that adopts of oil cavity, but different kinds of bearing seal of quick replacement are verified. The direct current motor adopts a Hall position sensor, an external potentiometer stepless speed regulation interface and a forward and reverse rotation selection switch, and realizes stepless speed change of 0-10000 rpm. The unqualified supplied materials of the shaft seal are eliminated, the maintenance and operation cost of the pump body is greatly reduced, the reliability of the pump body is improved, and the service life of the pump body is prolonged.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (10)
1. The utility model provides a shaft seal life-span proof test machine with higher speed which characterized in that, shaft seal life-span proof test machine with higher speed includes: the device comprises an oil chamber, a main shaft (1), a vacuum chamber, a shaft seal assembly and a direct current brushless motor (9);
the oil chamber comprises a first bearing fixing plate (5) and a second bearing fixing plate (7) which are fixedly connected with each other, a first lubricating oil cavity is formed in the first bearing fixing plate (5), and a second lubricating oil cavity is formed in the second bearing fixing plate (7); the first lubricating oil cavity and the second lubricating oil cavity are the same truncated cone-shaped cavities with slopes, and the bottom surfaces of the two truncated cone-shaped cavities are aligned with each other; the two bearings (3) are respectively arranged in the first bearing fixing plate (5) and the second bearing fixing plate (7) and are respectively aligned with the top surfaces of the truncated cone-shaped cavities of the first lubricating oil cavity and the second lubricating oil cavity; the area of the bottom surface is larger than that of the top surface;
the main shaft (1) penetrates through the first lubricating oil cavity and the second lubricating oil cavity and is mounted on the two bearings (3), an oil distribution disc (4) is sleeved on the main shaft (1), and the oil distribution disc (4) is located on the bottom surfaces of the two truncated cone-shaped cavities;
the upper part of the vacuum chamber is provided with a vacuum interface (10), and one side surface of the vacuum chamber is an open end; the open end is fixedly connected with an outer flange of the first bearing fixing plate (5) through a vacuum chamber flange, and a first sealing ring (28) is arranged between the vacuum chamber flange and the outer flange;
the shaft seal assembly comprises a shaft seal (6) and a shaft sleeve (2), and is sleeved at one end of the main shaft (1) and detachably mounted on the outer side of the first bearing fixing plate (5) and directly contacted with the inner space of the vacuum chamber.
2. The accelerated testing machine for testing shaft seal life according to claim 1, wherein temperature sensors are respectively installed inside the vacuum chamber, the shaft seal assembly and the oil chamber.
3. The accelerated testing machine for testing the service life of the shaft seal according to claim 1, wherein a through hole is formed in the side surface of the vacuum chamber, and the nitrogen gas pipe is connected with the shaft seal assembly through the through hole.
4. The accelerated testing machine for testing the service life of the shaft seal according to claim 1, wherein the shaft seal assembly is detachably mounted on a shaft sleeve positioning ring and a shaft seal positioning ring, the shaft sleeve positioning ring and the shaft seal positioning ring are two concentric circular ring structures, the shaft sleeve positioning ring is located inside the shaft seal positioning ring, and the shaft sleeve positioning ring and the shaft seal positioning ring are detachably mounted on the outer side of the first bearing fixing plate (5).
5. The shaft seal life acceleration verification testing machine according to claim 1, characterized in that the main shaft (1) is provided with a through hole for ensuring the pressure of the vacuum chamber and the lubricating oil chamber to be consistent.
6. The shaft seal life acceleration verification testing machine according to claim 1, wherein an oil inlet and an oil outlet are respectively formed in a side surface of the second bearing fixing plate (7), and both the oil inlet and the oil outlet are communicated with the second lubricating oil cavity.
7. The shaft seal life accelerated proof testing machine according to claim 1, characterized in that a labyrinth seal is arranged between the shaft seal assembly and the main shaft (1).
8. The shaft seal life acceleration proof test machine according to claim 1, characterized in that a cooling rack pipe is arranged outside the first bearing fixing plate (5) and the second bearing fixing plate (7), and the cooling rack pipe comprises cooling liquid.
9. The shaft seal life acceleration verification testing machine according to claim 1, characterized in that the dc brushless motor (9) is installed outside the second bearing fixing plate (7) at a side away from the vacuum chamber, and the dc brushless motor (9) is connected with the spindle (1) through a coupler (8).
10. The shaft seal life accelerated testing machine of claim 1 wherein an oil mirror is disposed on the side of said oil chamber for observing the level of the lubricating oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221184804.8U CN218444466U (en) | 2022-05-17 | 2022-05-17 | Accelerated verification testing machine for service life of shaft seal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221184804.8U CN218444466U (en) | 2022-05-17 | 2022-05-17 | Accelerated verification testing machine for service life of shaft seal |
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| CN218444466U true CN218444466U (en) | 2023-02-03 |
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| CN202221184804.8U Active CN218444466U (en) | 2022-05-17 | 2022-05-17 | Accelerated verification testing machine for service life of shaft seal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114923682A (en) * | 2022-05-17 | 2022-08-19 | 北京通嘉宏瑞科技有限公司 | Testing machine and testing method for accelerated verification of shaft seal service life |
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- 2022-05-17 CN CN202221184804.8U patent/CN218444466U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114923682A (en) * | 2022-05-17 | 2022-08-19 | 北京通嘉宏瑞科技有限公司 | Testing machine and testing method for accelerated verification of shaft seal service life |
| CN114923682B (en) * | 2022-05-17 | 2023-10-24 | 北京通嘉宏瑞科技有限公司 | Shaft seal service life acceleration verification testing machine and testing method |
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