CN112595468B - Seal detection device and seal detection method - Google Patents
Seal detection device and seal detection method Download PDFInfo
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- CN112595468B CN112595468B CN202011424436.5A CN202011424436A CN112595468B CN 112595468 B CN112595468 B CN 112595468B CN 202011424436 A CN202011424436 A CN 202011424436A CN 112595468 B CN112595468 B CN 112595468B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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Abstract
The embodiment of the disclosure provides a seal detection device and a seal detection method, belongs to the field of bearing seal detection, and aims to solve the problem that equipment and a method suitable for the effectiveness of a traction motor bearing labyrinth seal structure and a lubrication structure are not available. The second sealing piece comprises a first sealing ring connected with the bearing seat and a second sealing ring sleeved on the rotating shaft, the first sealing ring and the second sealing ring are partially staggered, a sealing gap is arranged between the staggered parts of the first sealing ring and the second sealing ring, the sealing gap extends towards the rotating shaft in a bending way, and the sealing gap is communicated with the bearing hole and the external space; the air pressure detection device is used for detecting air pressure of a first position and a second position in the sealing gap, and the first position and the second position are arranged along the radial interval of the rotating shaft. Therefore, whether gas flows in the sealing gap or not can be judged by detecting the air pressure difference between the first position and the second position, and the sealing effect of the sealing unit is further judged.
Description
Technical Field
The embodiment of the disclosure relates to the field of bearing seal detection, in particular to a seal detection device and a seal detection method.
Background
The traction motor for locomotive running generally comprises a stand, a stator and a rotor, wherein the stand encloses an installation space with shaft holes at two ends, the stator is fixedly arranged in the stand, the rotor is rotatably inserted on the stator, a rotor shaft of the rotor extends out of the stand through the shaft holes, and a bearing is arranged between the shaft holes and the rotor shaft to support the rotor shaft. In order to prevent foreign matters such as external dust from entering the bearing to cause abrasion of the bearing, the bearing needs to be sealed. One sealing mode is to use self-sealing bearings; another way is to use an open bearing, a bearing seal being provided on the side of the bearing facing away from the installation space.
In the related art, the self-sealing bearing tightness detection mode is as follows: and loading the single bearing into a test cavity, and rotating the bearing. Then, environments such as dust, water, high temperature and the like are introduced into the box body, after the box body is operated for a period of time, sealing covers at two sides of the self-sealing bearing are opened, the pollution state of lubricating grease in the bearing is detected, and then the sealing performance of the self-sealing bearing is judged.
However, the detection of the tightness of the bearing seal of the split bearing by the detection device of the self-sealing bearing is time-consuming and complex to operate.
Disclosure of Invention
The embodiment of the disclosure provides a seal detection device and a seal detection method, which are used for solving the problem that equipment and a method which are not suitable for the effectiveness of a labyrinth seal structure and a lubrication structure of a traction motor bearing are not available.
In one aspect, an embodiment of the disclosure provides a seal detection device, including an air pressure detection device, a bearing seat, a bearing, a rotating shaft, a first seal member and a second seal member, where the bearing seat is provided with a bearing hole, the bearing is installed in the bearing hole, the rotating shaft is arranged in an inner ring of the bearing in a penetrating manner, the first seal member is arranged on one side of the bearing to seal the bearing hole on one side of the bearing, and the second seal member is arranged on the other side of the bearing to seal the bearing hole on the other side of the bearing; the second sealing piece comprises a first sealing ring connected with the bearing seat and a second sealing ring sleeved on the rotating shaft, the first sealing ring and the second sealing ring are partially staggered, a sealing gap is arranged between the staggered parts of the first sealing ring and the second sealing ring, the sealing gap extends towards the rotating shaft in a bending way, and the sealing gap is communicated with the bearing hole and the external space; the air pressure detection device is connected with the first sealing ring and/or the second sealing ring and is used for detecting air pressure of a first position and a second position in the sealing gap, and the first position and the second position are arranged along the radial interval of the rotating shaft.
In some possible embodiments, the air pressure detecting device includes a first pressure sensor and a second pressure sensor, the second sealing member is provided with a first channel and a second channel, the first channel is communicated with the first position, the first pressure sensor is arranged in the first channel, the second channel is communicated with the second position, and the second pressure sensor is arranged in the second channel.
In some possible embodiments, the first channel and the second channel are both disposed on the first seal ring.
In some possible embodiments, the first channel and the second channel are the same length and diameter.
In some possible embodiments, a shaft shoulder is arranged on the rotating shaft, one side of the second sealing ring, which faces away from the bearing, is abutted against the shaft shoulder, and one side of the second sealing ring, which faces towards the bearing, is provided with a first abutting part abutted against an inner ring of the bearing.
In some possible embodiments, a side of the first sealing ring facing the bearing is provided with a second abutment portion, which abuts against an outer ring of the bearing.
In some possible embodiments, the first sealing member is a transparent member, and an oil storage tank is arranged on one side of the first sealing member facing the bearing, and a filling hole is arranged on the first sealing member and is communicated with the oil storage tank.
In some possible embodiments, the seal detection device further comprises a housing and a dust agitation device, the bearing housing being housed in the housing; the dust stirring device is used for stirring the dust in the box body so as to suspend the dust in the box body.
In some possible embodiments, the dust stirring device comprises a fan, an air outlet of the fan is connected with one side of the box body through an air inlet pipe, and an air outlet of the fan is connected with the other side of the box body through an air outlet pipe.
In some possible embodiments, the seal detection device further comprises a purifying box, an air outlet is arranged on the box body, the air outlet pipe is communicated with the air outlet through the purifying box, and a filter screen is covered on the air outlet.
In another aspect, an embodiment of the present disclosure provides a seal detection method, including:
a bearing hole for installing a bearing is formed in a bearing seat, a rotating shaft is arranged in an inner ring of the bearing in a penetrating manner, a first sealing piece is arranged on one side of the bearing to seal the bearing hole on one side of the bearing, and a second sealing piece is arranged on the other side of the bearing to seal the bearing hole on the other side of the bearing;
the second sealing piece is provided with a first sealing ring connected with the bearing seat and a second sealing ring sleeved on the rotating shaft, the first sealing ring and the second sealing ring are partially staggered, a sealing gap is arranged between the staggered parts of the first sealing ring and the second sealing ring, the sealing gap extends towards the rotating shaft in a bending way, and the sealing gap is communicated with the bearing hole and the external space;
acquiring first air pressure of a first position and second air pressure of a second position on the sealing gap, wherein the first position and the second position are arranged at intervals along the radial direction of the rotating shaft;
the magnitudes of the first gas pressure and the second gas pressure are compared to determine whether gas is flowing within the sealing gap.
The seal detection device and the seal detection method provided by the embodiment comprise an air pressure detection device, a bearing seat, a bearing, a rotating shaft, a first sealing piece and a second sealing piece, wherein a bearing hole is formed in the bearing seat, the bearing is arranged in the bearing hole, the rotating shaft penetrates through an inner ring of the bearing, the first sealing piece is arranged on one side of the bearing to seal the bearing hole on one side of the bearing, and the second sealing piece is arranged on the other side of the bearing to seal the bearing hole on the other side of the bearing; the second sealing piece comprises a first sealing ring connected with the bearing seat and a second sealing ring sleeved on the rotating shaft, the first sealing ring and the second sealing ring are partially staggered, a sealing gap is arranged between the staggered parts of the first sealing ring and the second sealing ring, the sealing gap extends towards the rotating shaft in a bending way, and the sealing gap is communicated with the bearing hole and the external space; the air pressure detection device is connected with the first sealing ring and/or the second sealing ring and is used for detecting air pressure of a first position and a second position in the sealing gap, and the first position and the second position are arranged along the radial interval of the rotating shaft. Therefore, whether gas flows in the sealing gap or not can be judged by detecting the air pressure difference between the first position and the second position, and further, the sealing effect of the sealing unit is judged, and the detection is more accurate.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of a seal detection device according to a first embodiment;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a right side view of FIG. 1;
fig. 4 is a schematic structural diagram of a seal detection device according to a second embodiment;
fig. 5 is a schematic diagram of a seal detection device according to a second embodiment.
Reference numerals illustrate:
10-bearing seats;
11-bearing holes;
20-a first seal;
21-filling holes;
22-an oil storage tank;
30-a second seal;
31-a first sealing ring;
32-a second sealing ring;
40-bearing;
50-rotating shaft;
61-a first pressure sensor;
62-a second pressure sensor;
63-a first channel;
64-a second channel;
70-a box body;
71-a sealing ring;
72-air inlet pipe;
80-purifying box;
81-an air outlet pipe;
82-a filter screen;
90-dust stirring device.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are some embodiments but not all embodiments. All other embodiments, which may be made by one of ordinary skill in the art based on the embodiments of the present disclosure without making any inventive effort, are intended to fall within the scope of the embodiments of the present disclosure. The following embodiments and features of the embodiments may be combined with each other without conflict.
In the embodiments of the present disclosure, unless explicitly stated otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as fixed connections, as removable connections, as integral forms, as mechanical connections, as electrical connections, or as communicable with each other; either directly or indirectly, through intermediaries, or both, in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the railroad industry, more and more locomotives are motor driven. The motor for driving a motor vehicle generally includes a housing enclosing a space having a shaft hole, a stator fixedly provided in the housing, and a rotor rotatably inserted on the stator and having a rotor shaft extending out of the housing through the shaft hole, with a bearing installed between the shaft hole and the rotor shaft to support the rotor shaft. The locomotive often works outdoors, a large amount of dust is usually mixed in the outdoor air, and when the locomotive moves, air flow is formed at the periphery of the locomotive so as to roll up fine sand on the ground, the dust in the air and the fine sand rolled up by the locomotive easily enter the bearing, so that the bearing is accelerated to wear and even damage, and in order to prevent the external dust, fine sand and other impurities from entering the bearing to cause the bearing to wear, the bearing needs to be sealed. The sealing of the bearing has two common modes, one is that the bearing adopts a self-sealing bearing, namely, the space between the inner ring and the outer ring of the bearing is sealed relative to the external space, so dust and fine sand cannot enter the space between the inner ring and the outer ring of the bearing; another way is to use an open bearing, and to provide a bearing seal, such as a labyrinth seal, on the side of the bearing facing away from the installation space. The labyrinth seal means that a tortuous sealing gap is arranged between the rotating part and the fixed part, the sealing gap is used for communicating spaces at two sides of the sealing piece, and the labyrinth effect is utilized for reducing the gas flow in the sealing gap, so that the sealing of the bearing is realized. In the practical application process, in order to ensure that the sealing of the bearing can achieve a preset effect, a special detection device needs to be arranged to verify the sealing performance of the bearing.
The self-sealing bearing tightness detection mode is as follows: and loading the single bearing into a test cavity, and rotating the bearing. Then, environments such as dust, water, high temperature and the like are introduced into the box body, after the box body is operated for a period of time, sealing covers at two sides of the self-sealing bearing are opened, the pollution state of lubricating grease in the bearing is detected, and then the sealing performance of the self-sealing bearing is judged.
However, the detection of the tightness of the bearing seal of the split bearing by the detection device of the self-sealing bearing is time-consuming and complex to operate.
In view of this, the embodiment of the disclosure provides a seal detection device and a seal detection method, in which a first position and a second position are taken along a radial direction of a seal member on a seal gap, air pressures of the first position and the second position are measured by an air pressure detection device, and tightness of the seal member is judged by comparing the air pressures of the first position and the second position, so that accuracy of a seal detection result is improved.
The following describes in detail a seal detection device and a seal detection method provided in an embodiment of the present disclosure with reference to the accompanying drawings.
Example 1
FIG. 1 is a cross-sectional view of a seal detection device according to a first embodiment; FIG. 2 is a left side view of FIG. 1; fig. 3 is a right side view of fig. 1.
As shown in fig. 1 to 3, the seal detection device provided in the embodiment of the present disclosure includes a bearing 40 seat 10, a bearing 40, a rotation shaft 50, a first seal 20, a second seal 30, and an air pressure detection device.
The bearing 40 mount 10 may be considered a support for the seal detection device and functions to support and connect other components. The bearing 40 seat 10 is provided with a bearing 40 hole 11, the bearing 40 is arranged in the bearing 40 hole 11, and the rotating shaft 50 is arranged on the inner ring of the bearing 40 in a penetrating way, so that the rotating shaft 50 can drive the inner ring of the bearing 40 to rotate relative to the bearing 40 seat 10. The first seal 20 is disposed at one side of the bearing 40 to block the bearing 40 hole 11 at one side of the bearing 40, and the second seal 30 is disposed at the other side of the bearing 40 to block the bearing 40 hole 11 at the other side of the bearing 40.
The bearing housing 10 is in a plate-shaped structure, the thickness of the bearing housing 10 is greater than that of the bearing 40, a bearing 40 hole 11 is formed along the thickness direction of the bearing housing 10, the bearing 40 is mounted in the middle of the bearing 40 hole 11, and a rotating shaft 50 is arranged on the inner ring of the bearing 40 in a penetrating manner and can rotate relative to the bearing housing 10. The first sealing member 20 and the second sealing member 30 are annular members sleeved on the rotating shaft 50, the inner peripheries of the first sealing member 20 and the second sealing member 30 are in sealing connection with the rotating shaft 50, the outer peripheries of the first sealing member 20 and the second sealing member 30 are in sealing connection with the side face of the bearing 40 seat 10 (for example, the first sealing member 20 is fixedly connected with one side of the bearing 40 seat 10 in a bolt connection mode, the second sealing member 30 is fixedly connected with the other side of the bearing 40 seat 10 in a bolt connection mode), the rotating shaft 50, the bearing 40 seat 10, the first sealing member 20 and the second sealing member 30 jointly form a relatively sealed space, and the bearing 40 is accommodated in the space.
In a specific application, one end of the rotating shaft 50 may be connected to a power device (such as a motor, an engine, etc.), and the power device drives the rotating shaft 50 to rotate, so as to simulate the actual working condition of the sealing element.
The second sealing member 30 includes a first sealing ring 31 connected to the bearing 40 seat 10 and a second sealing ring 32 sleeved on the rotating shaft 50, the first sealing ring 31 and the second sealing ring are partially staggered, a sealing gap is formed between the staggered parts of the first sealing ring 31 and the second sealing ring 32, the sealing gap extends to the rotating shaft 50 in a bending way, and the sealing gap is communicated with the bearing 40 hole 11 and the external space. The air pressure detecting means is for detecting air pressure at a first position and a second position in the sealing gap, the first position and the second position being disposed at intervals along the radial direction of the rotating shaft 50. When the gas pressures of the first position and the second position are the same, no pressure difference exists between the first position and the second position, so that the gas in the sealing gap cannot flow between the first position and the second position; when the gas pressures of the first position and the second position are different, a pressure difference exists between the first position and the second position, so that the gas in the sealing gap flows from a high pressure position to a low pressure position. The air pressure detecting means may be connected to the first seal ring 31 or to the second seal, or the air pressure detecting means may comprise two parts, one of which is connected to the first seal ring 31 and the other of which is connected to the second seal ring 32. Therefore, whether the gas flows in the sealing gap or not can be judged by detecting the gas pressure of the first position and the second position, and then the sealing effect of the second sealing piece 30 is judged, so that the detection is more accurate.
The seal detection device provided by the embodiment comprises an air pressure detection device, a bearing 40 seat 10, a bearing 40, a rotating shaft 50, a first seal piece 20 and a second seal piece 30, wherein the bearing 40 seat 10 is provided with a bearing 40 hole 11, the bearing 40 is installed in the bearing 40 hole 11, the rotating shaft 50 penetrates through the inner ring of the bearing 40, the first seal piece 20 is arranged on one side of the bearing 40 to seal the bearing 40 hole 11 on one side of the bearing 40, and the second seal piece 30 is arranged on the other side of the bearing 40 to seal the bearing 40 hole 11 on the other side of the bearing 40; the second sealing member 30 comprises a first sealing ring 31 connected with the bearing 40 seat 10 and a second sealing ring 32 sleeved on the rotating shaft 50, the first sealing ring 31 and the second sealing ring are partially staggered, a sealing gap is arranged between the staggered parts of the first sealing ring 31 and the second sealing ring 32, the sealing gap extends towards the rotating shaft 50 in a bending way, and the sealing gap is communicated with the hole 11 of the bearing 40 and the external space; the air pressure detecting device is connected to the first sealing ring 31 and/or the second sealing ring 32, and is used for detecting air pressure of a first position and a second position in the sealing gap, and the first position and the second position are arranged along the radial interval of the rotating shaft 50. Therefore, whether the gas flows in the sealing gap or not can be judged by detecting the gas pressure of the first position and the second position, and then the sealing effect of the second sealing piece 30 is judged, so that the detection is more accurate.
Alternatively, as shown in fig. 2, the air pressure detecting device includes a first pressure sensor 61 and a second pressure sensor 62, a first passage 63 and a second passage 64 are provided on the second seal member 30, the first passage 63 communicates with the first position, the first pressure sensor 61 is provided in the first passage 63, the second passage 64 communicates with the second position, and the second pressure sensor 62 is provided in the second passage 64. The pressure at the first position is led out through the first channel 63, the pressure in the first channel 63 is approximately equal to the pressure at the first position, and then the pressure in the first channel 63 is measured by the first pressure sensor 61, so that the measurement is more convenient.
Optionally, both the first channel 63 and the second channel 64 are provided on the first sealing ring 31. The first sealing ring 31 is connected to the bearing 40 seat 10, and the bearing 40 seat 10 is fixed during the test, so that the first channel 63 and the second channel 64 are arranged on the first sealing ring 31, that is, the first pressure sensor 61 and the second pressure sensor 62 are arranged on the first sealing ring 31, so that inaccurate measurement caused by rotation of the first pressure sensor 61 and the second pressure sensor 62 is prevented, and reading or wiring of the first pressure sensor 61 and the second pressure sensor 62 is also facilitated.
Alternatively, the first channel 63 and the second channel 64 are the same length and diameter. The length and diameter of the first and second channels 63, 64 are directly related to the magnitude of the pressure drop within the first and second channels 63, 64. For example, the longer the length of the first channel 63, the smaller the diameter, the greater the pressure drop within the first channel 63 and the second channel 64. Therefore, in order to prevent measurement errors caused by the difference in pressure drop of the first passage 63 and the second passage 64, the lengths and diameters of the first passage 63 and the second passage 64 are set to be the same.
Optionally, a shaft shoulder is provided on the rotating shaft 50, and a side of the second sealing ring 32 facing away from the bearing 40 abuts against the shaft shoulder, and a side of the second sealing ring 32 facing toward the bearing 40 is provided with a first abutting portion abutting against an inner ring of the bearing 40. This can make the fixation of the second seal ring 32 more firm.
Optionally, a second abutment portion is provided on a side of the first sealing ring 31 facing the bearing 40, the second abutment portion abutting against an outer ring of the bearing 40. This makes it possible to fix the first seal ring 31 to the bearing 40 holder 10 more firmly and to enhance the sealing effect between the first seal ring 31 and the bearing 40 holder 10.
Alternatively, as shown in fig. 3, the first sealing member 20 is a transparent member, and an oil storage tank 22 is disposed on a side of the first sealing member 20 facing the bearing 40, and a filling hole 21 is disposed on the first sealing member 20, where the filling hole 21 communicates with the oil storage tank 22. The first sealing member 20 is provided as a transparent member, so that when the bearing 40 is driven to rotate by the rotating shaft 50, the state of the grease in the oil storage tank 22 can be clearly observed, and whether the design of the first sealing member 20 is reasonable can be intuitively judged. In particular applications, grease of one color may be filled into the bearing 40, grease of another color may be added into the oil reservoir 22 through the filling hole 21, and the rationality of the design of the first seal 20 may be determined by observing the mixing state of the grease of the two colors when the rotating shaft 50 rotates. For example, when the grease of the two colors is mixed relatively uniformly, the design of the first seal 20 is proved to be reasonable.
Example two
Fig. 4 is a schematic structural diagram of a seal detection device according to the present embodiment; fig. 5 is a schematic diagram of a seal detecting device according to the present embodiment.
As shown in fig. 4 and 5, the seal detection device further comprises a box 70 and a dust stirring device 90, the bearing 40 seat 10 is accommodated in the box 70, and the rotating shaft 40 is in seal connection with the box 70 through a seal ring 71; the housing 70 is provided with dust therein, and the dust stirring device 90 is used to stir the dust in the housing 70 so as to suspend the dust in the housing 70. The dust stirring device 90 stirs the dust in the box 70, so that the dust is suspended in the box 70, thereby simulating the actual use environment of the sealing device of the bearing 40, and after the bearing 40 and the first sealing element 20 and the second sealing element 30 run for a certain time in the environment, the first sealing element 20 and the second sealing element 30 can be detached, and the sealing effect of the second sealing element 30 can be judged by detecting the quantity of the dust on the bearing 40, so that the sealing effect is more visual and accurate.
Optionally, the dust stirring device 90 includes a fan, an air outlet of which is connected to one side of the box 70 through the air inlet pipe 72, and an air outlet of which is connected to the other side of the box 70 through the air outlet pipe 81. Dust can be suspended in the housing 70 by blowing air into the housing 70 by a blower, thereby simulating the actual use environment of the first seal 20 and the second seal 30.
Optionally, the seal detection device further includes a purifying box 80, an air outlet is provided on the box body 70, an air outlet pipe 81 is communicated with the air outlet through the purifying box, and a filter screen 82 is covered on the air outlet. This prevents dust in the housing 70 from being blown out of the housing 70 through the air outlet pipe 81 and into the blower, on the one hand, the blower can be protected from dust, and on the other hand, dust in the housing 70 can be prevented from being reduced so that the actual working conditions of the first seal member 20 and the second seal member 30 cannot be simulated.
The seal detection device provided by the embodiment comprises an air pressure detection device, a bearing 40 seat 10, a bearing 40, a rotating shaft 50, a first seal piece 20 and a second seal piece 30, wherein the bearing 40 seat 10 is provided with a bearing 40 hole 11, the bearing 40 is installed in the bearing 40 hole 11, the rotating shaft 50 penetrates through the inner ring of the bearing 40, the first seal piece 20 is arranged on one side of the bearing 40 to seal the bearing 40 hole 11 on one side of the bearing 40, and the second seal piece 30 is arranged on the other side of the bearing 40 to seal the bearing 40 hole 11 on the other side of the bearing 40; the second sealing member 30 comprises a first sealing ring 31 connected with the bearing 40 seat 10 and a second sealing ring 32 sleeved on the rotating shaft 50, the first sealing ring 31 and the second sealing ring are partially staggered, a sealing gap is arranged between the staggered parts of the first sealing ring 31 and the second sealing ring 32, the sealing gap extends towards the rotating shaft 50 in a bending way, and the sealing gap is communicated with the hole 11 of the bearing 40 and the external space; the air pressure detecting device is connected to the first sealing ring 31 and/or the second sealing ring 32, and is used for detecting air pressure of a first position and a second position in the sealing gap, and the first position and the second position are arranged along the radial interval of the rotating shaft 50. Therefore, whether the gas flows in the sealing gap or not can be judged by detecting the gas pressure of the first position and the second position, and then the sealing effect of the second sealing piece 30 is judged, so that the detection is more accurate.
In another aspect, an embodiment of the present disclosure provides a seal detection method, including:
s1: the bearing seat is provided with a bearing hole for installing a bearing, a rotating shaft is arranged in an inner ring of the bearing in a penetrating way, a first sealing piece is arranged on one side of the bearing to seal the bearing hole on one side of the bearing, and a second sealing piece is arranged on the other side of the bearing to seal the bearing hole on the other side of the bearing. The second sealing piece is provided with a first sealing ring connected with the bearing seat and a second sealing ring sleeved on the rotating shaft, the first sealing ring and the second sealing ring are partially staggered, a sealing gap is arranged between the staggered parts of the first sealing ring and the second sealing ring, and the sealing gap extends towards the bending of the rotating shaft and is communicated with the bearing hole and the external space.
A containing space is defined by the first sealing element, the second sealing element and the bearing seat, the bearing is arranged in the containing space, and the containing space is communicated with the external space only through a sealing gap.
S2: and acquiring first air pressure of a first position and second air pressure of a second position on the sealing gap, wherein the first position and the second position are arranged along the radial interval of the rotating shaft.
In practice, the first air pressure at the first location and the second air pressure at the second location may be measured by an air pressure detecting device (e.g., an air pressure gauge), respectively.
S3: the first gas pressure and the second gas pressure are compared to determine whether gas is flowing within the sealed gap.
When the first air pressure and the second air pressure are unequal or the difference is larger, the air flow in the sealing gap is caused by the existence of the air pressure difference, that is to say, the air mixed with impurities outside can pass through the sealing gap to enter the bearing, and the tightness of the second sealing element is proved to be poor.
When the first air pressure is approximately equal to the second air pressure, no pressure difference exists in the sealing gap, so that no gas flows in the sealing gap, and air mixed with impurities outside is not easy to pass through the sealing gap to enter the bearing, and the sealing performance of the second sealing piece is better.
Finally, it should be noted that: the above embodiments are merely for illustrating the technical solutions of the embodiments of the disclosure, and are not limited thereto; although the embodiments of the present disclosure have been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present disclosure.
Claims (6)
1. The sealing detection device is characterized by comprising an air pressure detection device, a bearing seat, a bearing, a rotating shaft, a first sealing element and a second sealing element, wherein a bearing hole is formed in the bearing seat, the bearing is installed in the bearing hole, the rotating shaft penetrates through an inner ring of the bearing, the first sealing element is arranged on one side of the bearing to seal the bearing hole on one side of the bearing, and the second sealing element is arranged on the other side of the bearing to seal the bearing hole on the other side of the bearing;
the second sealing piece comprises a first sealing ring connected with the bearing seat and a second sealing ring sleeved on the rotating shaft, the first sealing ring and the second sealing ring are partially staggered, a sealing gap is arranged between the staggered parts of the first sealing ring and the second sealing ring, the sealing gap extends towards the rotating shaft in a bending way, and the sealing gap is communicated with the bearing hole and the external space; the air pressure detection device is connected with the first sealing ring and/or the second sealing ring and is used for detecting air pressure of a first position and a second position in the sealing gap, and the first position and the second position are arranged at intervals along the radial direction of the rotating shaft;
the air pressure detection device comprises a first pressure sensor and a second pressure sensor, a first channel and a second channel are arranged on the second sealing piece, the first channel is communicated with the first position, the first pressure sensor is arranged in the first channel, the second channel is communicated with the second position, and the second pressure sensor is arranged in the second channel;
the first channel and the second channel are both arranged on the first sealing ring;
the sealing detection device further comprises a box body and a purifying box, wherein an air outlet is formed in the box body, an air outlet pipe is communicated with the air outlet through the purifying box, and a filter screen is covered on the air outlet;
a shaft shoulder is arranged on the rotating shaft, one side, facing away from the bearing, of the second sealing ring is abutted against the shaft shoulder, and one side, facing towards the bearing, of the second sealing ring is provided with a first abutting part abutted against an inner ring of the bearing;
the first sealing piece is a transparent piece, an oil storage groove is formed in one side, facing the bearing, of the first sealing piece, and a filling hole is formed in the first sealing piece and communicated with the oil storage groove.
2. The seal detection device of claim 1, wherein the first channel and the second channel are the same length and diameter.
3. The seal detection device according to claim 1, wherein a side of the first seal ring facing the bearing is provided with a second abutment portion that abuts against an outer ring of the bearing.
4. A seal inspection apparatus according to any one of claims 1 to 3, further comprising a housing and dust agitation means, the bearing housing being received in the housing;
the dust stirring device is used for stirring the dust in the box body so as to suspend the dust in the box body.
5. The seal detection device according to claim 4, wherein the dust stirring device comprises a fan, an air outlet of the fan is connected with one side of the box body through an air inlet pipe, and an air outlet of the fan is connected with the other side of the box body through an air outlet pipe.
6. A seal detection method applied to the seal detection device according to claim 1, comprising:
a bearing hole for installing a bearing is formed in a bearing seat, a rotating shaft is arranged in an inner ring of the bearing in a penetrating manner, a first sealing piece is arranged on one side of the bearing to seal the bearing hole on one side of the bearing, and a second sealing piece is arranged on the other side of the bearing to seal the bearing hole on the other side of the bearing;
the second sealing piece is provided with a first sealing ring connected with the bearing seat and a second sealing ring sleeved on the rotating shaft, the first sealing ring and the second sealing ring are partially staggered, a sealing gap is arranged between the staggered parts of the first sealing ring and the second sealing ring, the sealing gap extends towards the rotating shaft in a bending way, and the sealing gap is communicated with the bearing hole and the external space;
acquiring first air pressure of a first position and second air pressure of a second position on the sealing gap, wherein the first position and the second position are arranged at intervals along the radial direction of the rotating shaft;
the magnitudes of the first gas pressure and the second gas pressure are compared to determine whether gas is flowing within the sealing gap.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007101356A (en) * | 2005-10-04 | 2007-04-19 | Nsk Ltd | Method of inspecting rolling bearing with sealing ring |
| FR3051907A1 (en) * | 2016-05-30 | 2017-12-01 | Snecma | SEALING TEST DEVICE |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4993256A (en) * | 1988-04-20 | 1991-02-19 | Kabushiki Kaisha Fukuda | Leakage test method and apparatus |
| JP2000329641A (en) * | 1999-05-20 | 2000-11-30 | Nissan Motor Co Ltd | Method and device for detecting erroneous assembly of seal ring |
| CN101973453A (en) * | 2010-09-14 | 2011-02-16 | 上海科大重工集团有限公司 | Roller bearing seat and rubber belt conveyor adopting same |
| CN202296247U (en) * | 2011-09-20 | 2012-07-04 | 孙作东 | Sealed rotating wheel assembly |
| CN203363401U (en) * | 2013-06-19 | 2013-12-25 | 河南中联节能工程有限公司 | Balance weight flap valve shaft end sealing device |
| CN205937201U (en) * | 2016-08-16 | 2017-02-08 | 湖南奇思环保设备制造有限公司 | Bearing box and slush pump |
| CN106451893A (en) * | 2016-12-02 | 2017-02-22 | 中车永济电机有限公司 | Novel bearing chamber structure of motor |
| CN109297638A (en) * | 2018-11-30 | 2019-02-01 | 常熟长城轴承有限公司 | A kind of bearing dust-proof test device |
| CN111947852A (en) * | 2019-05-15 | 2020-11-17 | 北京同方洁净技术有限公司 | Sealing monitoring system for monitoring sealing connection state and monitoring method thereof |
-
2020
- 2020-12-08 CN CN202011424436.5A patent/CN112595468B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007101356A (en) * | 2005-10-04 | 2007-04-19 | Nsk Ltd | Method of inspecting rolling bearing with sealing ring |
| FR3051907A1 (en) * | 2016-05-30 | 2017-12-01 | Snecma | SEALING TEST DEVICE |
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