CN213932413U - Marine non-contact water lubricated bearing clearance measuring device - Google Patents
Marine non-contact water lubricated bearing clearance measuring device Download PDFInfo
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- CN213932413U CN213932413U CN202120029858.6U CN202120029858U CN213932413U CN 213932413 U CN213932413 U CN 213932413U CN 202120029858 U CN202120029858 U CN 202120029858U CN 213932413 U CN213932413 U CN 213932413U
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Abstract
The utility model relates to a marine non-contact water lubricated bearing clearance measuring device, which comprises a mounting seat, a sleeve, a high-frequency sound-electricity conversion module, an underwater wave-transmitting panel, a sealing end cover, a first sealing gasket and a second sealing gasket; the bottom of the through hole of the mounting seat is provided with a step surface as a wave speed correction surface; the first sealing gasket, the underwater wave-transmitting panel and the second sealing gasket are sequentially arranged above the wave velocity correction surface; the sleeve is arranged in the through hole, and the lower end of the sleeve compresses the second sealing gasket; the high-frequency sound-electricity conversion module is arranged in the sleeve; the sealing end cover is arranged at the top of the mounting seat; the water lubricated bearing gap measuring device is arranged above the water lubricated bearing and is fixed on the ship structure; and a through hole for measurement is formed in the upper part of the water lubrication bearing corresponding to the measuring device, so that a channel is provided for measuring sound waves. The utility model discloses realize the monitoring to the lubricated bearing state of water based on ultrasonic wave echo principle to wave speed through the device from the area rectifies the ladder face, with the influence that the different environment sea water of adaptation brought.
Description
Technical Field
The utility model relates to a boats and ships propulsion system technical field, concretely relates to measurement device who carries out real-time supervision to shafting water lubrication bearing clearance in sea water environment.
Background
The water lubricated bearing of the ship is used for supporting shafting operation and is generally positioned outboard. The state of the water lubrication bearing directly influences the working condition of the whole propeller shaft system, when the abrasion loss is too large, the shafting vibration is easy to be too large due to the cantilever effect of the propeller, the abrasion of the bearing is accelerated, the safety and the reliability of the shafting are reduced, and other shafting equipment can be damaged even, so that a ship loses maneuverability.
At present, a method for underwater measurement or in-dock measurement of a diver is adopted for the water lubricated bearing, ship stopping or docking is required, the abrasion condition of the water lubricated bearing is difficult to master in real time, and the risk of bearing abrasion cannot be timely solved.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem who solves lies in the not enough that exists to above-mentioned prior art, a marine non-contact water lubricated bearing clearance measuring device is provided, it realizes carrying out real-time supervision to shafting water lubricated bearing clearance in the marine environment through the produced high frequency sound wave of a high frequency sound-electricity conversion module and supporting part, judge the operating condition and the in service behavior of bearing through measuring the gained clearance, through long-term monitoring and data contrastive analysis, can calculate the wear rate and the later stage available life-span of bearing, the risk that the shafting probably takes place is separated to the chemistry.
The utility model discloses a solve the technical scheme that technical problem that the aforesaid provided adopted and be:
a marine non-contact water-lubricated bearing clearance measuring device comprises a mounting seat, a sleeve, a high-frequency sound-electricity conversion module, an underwater wave-transmitting panel, a sealing end cover, a first sealing gasket and a second sealing gasket; the mounting seat is used as a mounting base of the whole measuring device, the main structure of the mounting seat is an annular structure with a through hole in the middle, and a stepped surface is arranged at the bottom of the through hole and is used as a wave speed correcting surface; the first sealing gasket, the underwater wave-transmitting panel and the second sealing gasket are sequentially arranged above the wave velocity correction surface from bottom to top; the sleeve is arranged in the through hole, and the lower end of the sleeve compresses the second sealing gasket; the high-frequency sound-electricity conversion module is arranged in the sleeve, a sealed waterproof cable channel is arranged above the high-frequency sound-electricity conversion module, and a power line and a signal line of the high-frequency sound-electricity conversion module are laid in the sealed waterproof cable channel and enter the cabin to be connected with the signal processing device; the sealing end cover is arranged at the top of the mounting seat, so that the underwater sealing performance is ensured; the water lubricated bearing gap measuring device is arranged above the water lubricated bearing and is fixed on the ship structure; and a through hole for measurement is formed in the upper part of the water lubrication bearing corresponding to the measuring device, so that a channel is provided for measuring sound waves.
In the above scheme, the wave velocity correction surface includes a first wave velocity correction surface and a second wave velocity correction surface that are sequentially arranged from top to bottom, both wave velocity correction surfaces are circular surfaces, and the diameter of the first wave velocity correction surface is greater than the second wave velocity correction surface.
In the scheme, the widths of the circular rings of the two wave velocity correction surfaces are as narrow as possible on the premise of identifying and receiving the echo waves; in order to ensure the quality of echo signals, the roughness of the step surface is more than Ra3.2.
In the above scheme, the high-frequency sound-electricity conversion module is integrated with an ultrasonic transmitting probe and a receiving probe.
In the scheme, the sealing end cover is connected with the mounting seat through threads, and a third sealing gasket and a fourth sealing gasket are respectively arranged on the non-threaded matching surface of the sealing end cover and the mounting seat, so that the underwater sealing performance is ensured; and a cable passage hole with a sealing ring is arranged at the top of the sealing end cover.
In the above scheme, the mounting base is further including setting up in the installation department of major structure outer lane, be equipped with the bolt hole for the installation on the installation department, be fixed in the mounted position that the hull structure was reserved with measuring device through the bolt.
In the scheme, the sealed waterproof cable channel penetrates through the sealed end cover at the top of the mounting seat and then is laid along the hull structure until entering the cabin.
The marine non-contact water-lubricated bearing clearance measuring method comprises the following steps:
s1, installing a water lubrication bearing clearance measuring device: firstly, sequentially installing a first sealing gasket, an underwater wave-transmitting panel and a second sealing gasket in an installation seat; fixing the high-frequency sound-electricity conversion module in the sleeve, and arranging the high-frequency sound-electricity conversion module and the sleeve into the mounting seat together, wherein a power line and a signal line of the high-frequency sound-electricity conversion module penetrate through the sealed waterproof cable channel and penetrate through a cable channel hole with a sealing ring at the top of the sealed end cover along with the sealed waterproof cable channel; the sealed waterproof cable channel is laid along the hull structure until entering the cabin; before the sealing end cover is installed, the third sealing gasket and the fourth sealing gasket are arranged at corresponding positions, then the sealing end cover is installed, the screwing threads are fixed on the installation seat, and meanwhile, a certain pre-tightening force is applied to the first sealing gasket and the second sealing gasket through the compression sleeve;
s2, counting the time T of the sound wave reaching the first wave speed correction surface1And the time T for the sound wave to reach the second wave velocity correction surface2And calculating the actual transmission velocity V of the sound wavePractice of：
In the formula, L1The vertical distance from the probe to the first wave velocity correction surface is a starting point for determining a calibration size; l is2The vertical distance from the probe to the second wave velocity correction surface is an end point for determining the calibration size; calibration standard length LCalibration＝L2-L1；
S3, calculating the vertical distance H between the probe and the transmission shaft:
wherein L is the ultrasonic one-way distance; m is half of the distance between the transmitting probe and the receiving probe;
s4, calculating the wear amount xi of the bearing:
ξ＝Hn-H0 (7)
in the formula, HnIs the nth measurement, H0Is an initial value.
The beneficial effects of the utility model reside in that:
1) the utility model discloses the device is based on ultrasonic wave echo principle, and the application time difference measurement technique detects the distance between ultrasonic transducer and target (transmission shaft), has swept shafting water lubricated bearing monitoring blind area, realizes the monitoring to the water lubricated bearing state, can be through improving ultrasonic frequency, guarantees measurement accuracy. The water lubricated bearing clearance measuring device adopts non-contact measurement, and does not influence the operation of a shafting.
2) The device has a correction function, and the stepped surface is corrected through the wave speed of the device so as to adapt to the influence caused by seawater in different environments.
3) The device reflects the current abrasion loss of the water lubricated bearing according to the measured data, and can judge the working state of the water lubricated bearing according to the abrasion loss of the water lubricated bearing; the measured data can provide support for the comprehensive guarantee of the later-stage water lubrication bearing.
4) The device adopts a double-crystal probe, integrates an ultrasonic transmitting probe and an ultrasonic receiving probe in a high-frequency sound-electricity conversion module, separately processes the transmission and the reception of ultrasonic waves, improves the measurement stability, integrates an ultrasonic transmitter and an ultrasonic receiver and realizes non-contact measurement;
5) the device adopts a wave-transparent material which is resistant to seawater corrosion as an underwater wave-transparent panel, and ensures the transmission quality of the measured wave under the condition of adapting to certain seawater pressure.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
FIG. 1 is an overall structure diagram of the gap measuring device for the water lubricated bearing of the present invention;
FIG. 2 is an enlarged view of a portion of the bottom of the water lubricated bearing clearance measuring device shown in FIG. 1;
FIG. 3 is an enlarged view of a portion of the top of the water lubricated bearing clearance measuring device of FIG. 1;
FIG. 4 is a schematic layout of the gap measuring device for water lubricated bearing of the present invention;
FIG. 5 is an installation diagram of the gap measuring device for water lubricated bearing of the present invention;
FIG. 6 is a schematic diagram of ultrasonic ranging;
fig. 7-8 are schematic diagrams of water lubricated bearing clearance measurement with step calibration.
In the figure: 100. a water lubricated bearing clearance measuring device; 10. a mounting seat; 11. mounting bolt holes; 20. a sleeve; 30. a high-frequency acoustoelectric conversion module; 40. an underwater wave-transparent panel; 50. sealing the end cap; 60. a seal ring; 70. sealing the waterproof cable channel; 81. a first gasket; 82. a second gasket; 83. a third gasket; 84. a fourth gasket; 90. a wave velocity correction surface;
200. a stern shaft tube; 201. a propeller shaft bracket; 300. water lubricating the bearing; 301. a bearing sleeve; 302. a bearing material; 400. a drive shaft; 500. a hull outer plate; 600. and a through hole for measurement.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1-3, for the utility model provides a marine non-contact water lubricated bearing clearance measuring device 100, including mount pad 10, sleeve 20, high frequency sound-electricity conversion module 30, wave-transparent panel 40 under water, end cover 50, sealed waterproof cable passageway 70, first sealed pad 81, second sealed pad 82, third sealed pad 83 and fourth sealed pad 84.
The mounting seat 10 serves as a mounting base of the whole measuring device, the main structure of the mounting seat is an annular structure with a through hole in the middle, the outer ring of the main structure is a mounting portion, a mounting bolt hole 11 is formed in the mounting portion, and the measuring device is fixed at a mounting position reserved in a ship structure through a bolt.
The bottom of the through hole of the mounting seat 10 is provided with a step surface as a wave velocity correction surface 90, which comprises a first wave velocity correction surface and a second wave velocity correction surface sequentially arranged from top to bottom. The two wave velocity correction surfaces 90 are both circular surfaces, and the diameter of the first wave velocity correction surface is larger than that of the second wave velocity correction surface. In order to attenuate the signal reflected by the step surface fast enough and prevent the noise generated by the repeated reflection of the sound wave between the step surface and the underwater wave-transmitting panel 40, the width of the ring should be as narrow as possible under the condition of identifying the received echo. In order to ensure the quality of echo signals, the roughness of the step surface is above Ra3.2.
The first sealing gasket 81, the underwater wave-transparent panel 40 and the second sealing gasket 82 are sequentially installed above the wave velocity correction surface 90 from bottom to top. The high-frequency sound-electricity conversion module 30 is arranged in the sleeve 20 and is arranged in the through hole along with the sleeve 20, and the second sealing gasket 82 is tightly pressed at the lower end of the sleeve 20, so that the underwater sealing performance is ensured. A sealed waterproof cable channel 70 is arranged above the high-frequency sound-electricity conversion module 30, and the sealed waterproof cable channel 70 penetrates through the sealing end cover 50 at the top of the mounting seat 10 and then is laid along the hull structure until entering the cabin. The power line and the signal line of the high-frequency sound-electricity conversion module 30 penetrate through the sealed waterproof cable channel 70, enter the cabin and are connected with the signal processing device, and the signal processing device is connected with the display and operation terminal in the cabin. The sealing end cap 50 is mounted on the top of the mounting seat 10, and is connected to the mounting seat 10 through a screw thread, and a cable passage hole with a sealing ring 60 is formed on the top of the sealing end cap. The non-threaded matching surfaces of the sealing end cover 50 and the mounting seat 10 are respectively provided with a third sealing gasket 83 and a fourth sealing gasket 84, so that the underwater sealing performance is ensured.
As shown in fig. 4, the water lubricated bearing clearance measuring device 100 is disposed right above the water lubricated bearing 300 and fixed on the hull structure, specifically, the mounting seat 10 is installed in the stern shaft tube 200, and the sealed waterproof cable channel 70 is laid along the stern shaft bracket 201 until entering the cabin. The power lines and signal lines of the high-frequency sound-electricity conversion module 30 are laid upwards along the hull structure in the sealed waterproof cable channel 70, finally enter the cabin through the sealed cable holes of the hull outer plate 500, and are connected with the signal processing device and the display and operation terminal.
As shown in fig. 5, the mounting seat 10 of the water lubricated bearing clearance measuring device 100 is provided with a mounting bolt hole 11, the mounting bolt hole is fixed at a reserved mounting position of the stern shaft tube 200 by using a bolt, and a measuring through hole 600 is formed at the upper part of the water lubricated bearing 300 (including the bearing sleeve 301 and the bearing material 302) corresponding to the measuring device to provide a channel for measuring sound waves. Mounted inside the water lubricated bearing 300 is a propeller shaft 400.
The utility model discloses water lubricated bearing clearance measuring device 100's mounting method is as follows: the first gasket 81, the underwater wave-transmitting panel 40, and the second gasket 82 are installed in the installation base 10 in sequence. The high-frequency sound-electricity conversion module 30 is fixed in the sleeve 20 and is installed in the installation seat 10, and the power line and the signal line of the high-frequency sound-electricity conversion module pass through the waterproof sealing cable channel 70 and then pass through the cable channel hole with the sealing ring 60 on the top of the sealing end cover 50 along with the waterproof sealing cable channel 70. A sealed and watertight cable channel 70 is laid along the hull structure until inside the cabin. Before the sealing end cover 50 is installed, the third sealing gasket 83 and the fourth sealing gasket 84 are arranged at corresponding positions, then the sealing end cover 50 is installed, the sealing end cover is screwed and fixed on the installation seat 10, and meanwhile, a certain pre-tightening force is applied to the first sealing gasket 81 and the second sealing gasket 82 through the compression sleeve 20.
The utility model discloses marine non-contact water lubricated bearing clearance measurement device 100's measurement principle as follows:
as shown in fig. 6, the ultrasonic ranging employs the acoustic echo principle, and employs a time difference measurement technique to detect the distance between the ultrasonic probe and the target (the drive shaft 400). The distance measured in fig. 6 is H, the distance between the transmitting probe and the receiving probe is 2M, H will become progressively larger as the bearing wears, and M will remain the same. L is ultrasonic one-way distance:
where V is the transmission speed of the ultrasonic wave in the sea water, and T is the transmission time, i.e., the time from transmission to reception of the ultrasonic wave.
The transmission speed V of the ultrasonic waves in the seawater is influenced by the temperature and salinity of the seawater, the height of each liter is 1 ℃, and the sound velocity in the seawater is increased by about 4.6 m/s. In order to improve the measurement accuracy, the utility model discloses the device has designed the wave speed correction ladder face of rectifying to the acoustic wave speed to the influence that the different environment sea water of adaptation brought. As shown in FIG. 7, L1Starting point for determining calibration size, L2For determining the end point of a calibration dimension of length LCalibration＝L2-L1。
As shown in FIG. 8, T1For the time, T, of arrival of the sound wave at the first wave velocity correction surface2The time when the sound wave reaches the second wave velocity correction surface, and the distance difference between the first wave velocity correction surface and the second wave velocity correction surface is a fixed value determined by design. Considering that the actual sound velocity is affected by temperature, salinity and other factors, the sound velocity 1511m/s obtained through statistics cannot be directly used for accurately calculating each length value, and the actual transmission velocity of the sound wave can be obtained by the following formula:
will VPractice ofThe value of L is obtained by substituting the formula (1):
and the distance H between the probe and the target can be given by:
as the bearing wears, the value of H will gradually increase, and the amount ξ of wear of the bearing is:
ξ＝Hn-H0 (7)
in the formula, HnIs the nth measurement, H0Is an initial value.
The utility model discloses device and measuring method's advantage lies in:
1) based on the ultrasonic echo principle, the measurement precision is ensured by improving the ultrasonic frequency. And proper frequency is selected according to the measurement accuracy, and the propagation length of a single pulse period in water can be reduced by increasing the frequency, so that the detection accuracy is improved. Such as: for the measurement accuracy of 0.5mm, the transmitting frequency of 5MHz is selected, and at the moment, the distance of a single sound wave pulse in water is 0.3mm, so that the accuracy requirement is met.
2) The device has a correction function, and the stepped surface is corrected through the wave speed of the device so as to adapt to the influence caused by seawater in different environments;
3) the device adopts a double-crystal probe, integrates an ultrasonic transmitting probe and an ultrasonic receiving probe in a high-frequency sound-electricity conversion module, separately processes the transmission and the reception of ultrasonic waves, improves the measurement stability, integrates an ultrasonic transmitter and an ultrasonic receiver and realizes non-contact measurement;
4) the device adopts a wave-transparent material which is resistant to seawater corrosion as the underwater wave-transparent panel 40, and ensures the transmission quality of the measured wave under the condition of adapting to a certain seawater pressure.
While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (7)
1. A non-contact water-lubricated bearing clearance measuring device for ships is characterized in that,
the device for measuring the clearance of the water-lubricated bearing comprises a mounting seat, a sleeve, a high-frequency sound-electricity conversion module, an underwater wave-transmitting panel, a sealing end cover, a first sealing gasket and a second sealing gasket;
the mounting seat is used as a mounting base of the whole measuring device, the main structure of the mounting seat is an annular structure with a through hole in the middle, and a stepped surface is arranged at the bottom of the through hole and is used as a wave speed correcting surface; the first sealing gasket, the underwater wave-transmitting panel and the second sealing gasket are sequentially arranged above the wave velocity correction surface from bottom to top; the sleeve is arranged in the through hole, and the lower end of the sleeve compresses the second sealing gasket; the high-frequency sound-electricity conversion module is arranged in the sleeve, a sealed waterproof cable channel is arranged above the high-frequency sound-electricity conversion module, and a power line and a signal line of the high-frequency sound-electricity conversion module are laid in the sealed waterproof cable channel and enter the cabin to be connected with the signal processing device; the sealing end cover is arranged at the top of the mounting seat, so that the underwater sealing performance is ensured;
the water lubricated bearing gap measuring device is arranged above the water lubricated bearing and is fixed on the ship structure; and a through hole for measurement is formed in the upper part of the water lubrication bearing corresponding to the measuring device, so that a channel is provided for measuring sound waves.
2. The marine non-contact water-lubricated bearing clearance measuring device according to claim 1, wherein the wave velocity correction surfaces comprise a first wave velocity correction surface and a second wave velocity correction surface which are arranged from top to bottom in sequence, both the wave velocity correction surfaces are circular surfaces, and the diameter of the first wave velocity correction surface is larger than that of the second wave velocity correction surface.
3. The marine non-contact water-lubricated bearing clearance measuring device according to claim 2, wherein the annular widths of the two wave velocity correction surfaces are as narrow as possible on the premise that the received echoes can be identified; in order to ensure the quality of echo signals, the roughness of the step surface is more than Ra3.2.
4. The marine non-contact water-lubricated bearing clearance measuring device according to claim 1, wherein an ultrasonic transmitting probe and a receiving probe are integrated in the high-frequency sound-electricity conversion module.
5. The marine non-contact water lubricated bearing clearance measuring device according to claim 1, wherein the seal end cover is connected with the mounting seat through threads, and a third seal gasket and a fourth seal gasket are respectively arranged on the non-threaded matching surfaces of the seal end cover and the mounting seat, so that the underwater sealing performance is ensured; and a cable passage hole with a sealing ring is arranged at the top of the sealing end cover.
6. The marine non-contact water-lubricated bearing clearance measuring device according to claim 1, wherein the mounting seat further comprises a mounting part arranged on the outer ring of the main structure, the mounting part is provided with mounting bolt holes, and the measuring device is fixed at a reserved mounting position of the hull structure through bolts.
7. The marine non-contact water lubricated bearing clearance measuring device of claim 1, wherein the watertight cable channel runs through the end cap at the top of the mount along the hull structure until it enters the tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120029858.6U CN213932413U (en) | 2021-01-07 | 2021-01-07 | Marine non-contact water lubricated bearing clearance measuring device |
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| CN202120029858.6U CN213932413U (en) | 2021-01-07 | 2021-01-07 | Marine non-contact water lubricated bearing clearance measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116576765A (en) * | 2023-07-11 | 2023-08-11 | 武汉市海益高端装备结构设计有限公司 | Wear monitoring device for ship stern shaft water lubrication bearing |
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2021
- 2021-01-07 CN CN202120029858.6U patent/CN213932413U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116576765A (en) * | 2023-07-11 | 2023-08-11 | 武汉市海益高端装备结构设计有限公司 | Wear monitoring device for ship stern shaft water lubrication bearing |
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