CN210265514U - Large-scale bearing bush of integrated pressure sensor - Google Patents
Large-scale bearing bush of integrated pressure sensor Download PDFInfo
- Publication number
- CN210265514U CN210265514U CN201920640332.4U CN201920640332U CN210265514U CN 210265514 U CN210265514 U CN 210265514U CN 201920640332 U CN201920640332 U CN 201920640332U CN 210265514 U CN210265514 U CN 210265514U
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- layer
- bearing bush
- rigid back
- tin
- back layer
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- 239000000523 sample Substances 0.000 claims abstract description 46
- 238000000034 method Methods 0.000 claims abstract description 12
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 7
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 24
- 229910045601 alloy Inorganic materials 0.000 claims description 16
- 239000000956 alloy Substances 0.000 claims description 16
- 239000000919 ceramic Substances 0.000 claims description 10
- 238000009413 insulation Methods 0.000 claims description 4
- 238000010292 electrical insulation Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 abstract description 8
- 238000009750 centrifugal casting Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 34
- 239000010410 layer Substances 0.000 description 30
- 241000357293 Leptobrama muelleri Species 0.000 description 8
- 238000005266 casting Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 7
- 239000011247 coating layer Substances 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 238000000576 coating method Methods 0.000 description 5
- 238000009530 blood pressure measurement Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000009661 fatigue test Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 229910001128 Sn alloy Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
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- Sliding-Contact Bearings (AREA)
Abstract
An object of the utility model is to provide an integrated pressure sensor's large-scale axle bush, including the upper bearing shell, lower bearing shell, set up the rigid back layer on the upper bearing shell, go up rigid back layer internal surface and adopt the tin-lined technology to cast and go up the tin-lined layer, set up rigid back layer down on the lower bearing shell, install sensor probe array on the rigid back layer internal surface down, rigid back layer internal surface adopts the tin-lined technology to cast down and ward tin-lined layer down, the sensor probe of sensor probe array is located lower tin-lined layer inside, go up on tin-lined layer and down on the tin-lined layer centrifugal casting alloy-layer, go up the axle bush and offer logical oilhole and oil duct, rigid back layer sets up the pin hole down, the sensor probe outer lead wire of sensor probe array draws down the axle bush outside through the pin hole, go up rigid back layer and. The utility model discloses not only can satisfy the support of axle bush, lubricated, heavily loaded use needs, can be through the oil film pressure size and the oil film pressure distribution form of built-in pressure sensor real-time supervision operation in-process axle bush simultaneously.
Description
Technical Field
The utility model relates to a low-speed diesel engine, specifically speaking are low-speed diesel engine axle bush.
Background
The connecting rod big-end bearing bush of the high-power marine diesel engine is used as the most main rotary friction pair in the diesel engine, and the friction loss of the connecting rod big-end bearing bush accounts for more than 20 percent of the friction loss of the whole diesel engine, so that the connecting rod big-end bearing bush is one of the heavy parts of the high-power medium-low speed diesel engine. The bearing bush has many defects or insufficiencies in the aspects of structural design, product processing, part installation and debugging, maintenance and detection and the like, and the defects or insufficiencies can cause the equipment to generate vibration, local oil film pressure rise, friction rise and flash evaporation impact pressure with violent flash evaporation of lubricating oil in the running process, so that the fatigue pitting and peeling of an alloy layer of the bearing bush can be easily caused, the service lives of the bearing bush and a crankshaft can be seriously influenced, and even serious damage accidents can be caused.
The existing method for testing the oil film pressure of the bearing bush mainly comprises the following steps: and (3) destroying the pressure of an externally-introduced oil film of the bearing bush structure or installing a pressure sensor on the crankshaft. The damaged bearing bush structure is characterized in that a plurality of through holes are drilled in the whole bearing bush surface according to pressure measuring point positions, then the through holes are communicated with an external measuring loop, the oil film pressure at the point is measured after the oil film pressure is led out, and the through holes are opened to measure the oil film pressure, so that the influences of serious instability such as lubricating oil leakage, oil film pressure surface damage, orifice runoff amplification and the like exist in the oil film pressure measurement. The pressure sensor is arranged on the crankshaft, so that the oil film pressure of the motion surface can be accurately measured, but the crank shaft is provided with the sensor mounting hole, so that the crank shaft strength is greatly reduced, the combination condition of the crank shaft and the bearing bush surface is damaged, and the real-time change of the measurement position is huge. When multi-point measurement is adopted, the number of output channels of the slip ring is greatly increased, the engineering application performance is extremely poor, and the slip ring cannot be used in actual installation. The integrated sensor type bearing bush is adopted, the defects and shortcomings of the method are effectively overcome, and similarly, the integrated bearing bush only needs to consider the centralized installation slot position of the external outgoing line, and all line bodies are sealed and insulated after being led out completely and then return to an external circuit, so that the positions of all measuring points of the bearing bush can be monitored in a centralized mode.
Disclosure of Invention
An object of the utility model is to provide a not only can normally satisfy the support of axle bush, lubricated, heavily loaded use needs, can be through the large-scale axle bush of an integrated pressure sensor of the oil film pressure size and the oil film pressure distribution form of built-in pressure sensor real-time supervision operation in-process axle bush simultaneously.
The purpose of the utility model is realized like this:
the utility model relates to an integrated pressure sensor's large-scale axle bush, characterized by: the sensor probe array comprises an upper bearing bush and a lower bearing bush, wherein an upper rigid back layer is arranged on the upper bearing bush, an upper tin lining layer is cast on the inner surface of the upper rigid back layer by adopting a tin lining process, a lower rigid back layer is arranged on the lower bearing bush, a sensor probe array is arranged on the inner surface of the lower rigid back layer, a lower tin lining layer is cast on the inner surface of the lower rigid back layer by adopting a tin lining process, the sensor probes of the sensor probe array are positioned in the inner part of the lower tin lining layer, an alloy layer is centrifugally cast on the upper tin lining layer and the lower tin lining layer, an oil through hole and an oil passage are formed in the upper bearing bush, a lead hole is formed in the lower rigid back layer, a sensor probe outer lead of the sensor probe array is led.
The utility model discloses can also include:
1. the lead wire hole is an insulated ceramic conduit with temperature heat insulation and electrical insulation.
2. The sensor probes of the sensor probe array are uniformly arranged along the axial direction and the circumferential direction of the lower rigid back layer.
The utility model has the advantages that:
1. compared with the prior art, the technology can not only normally meet the use requirements of supporting, lubricating and heavy loading of the bearing bush, but also monitor the oil film pressure and the oil film pressure distribution form of the bearing bush in the running process in real time through the built-in pressure sensor.
2. Compared with the prior art, the product can accurately measure the oil film pressure and the oil film pressure distribution condition of the bearing bush under the condition of not damaging the inner surfaces of the crankshaft and the bearing bush, has higher measurement precision, more accurate reaction oil film pressure size and distribution, simpler structure and stronger engineering implementation performance, and can solve the difficult problems of inaccurate oil film pressure measurement and incapability of engineering implementation in the bearing bush industry
3. Compared with the prior art, more measuring points can be implemented, the prior art is limited by pressure external guide and crankshaft installation space, the positions and the number of the sensor parts are greatly limited, the measured data positions are few and the positions are fixed, the received effective data are also few, sufficient data cannot be provided for theoretical analysis, the system has flexible measuring point position arrangement, the measuring point arrangement number can be effectively increased, the obtained measuring point data are sufficient, the feedback data are accurate, and the engineering batch production has good feasibility of implementation.
Drawings
FIG. 1a is a schematic view of the lower bearing bush and an external circuit system, and FIG. 1b is a schematic view of a sensor probe array of the lower bearing bush;
FIG. 2 is a block diagram of an integrated pressure sensor bushing system;
fig. 3a is a general schematic view of a bearing shell, fig. 3b is a right side view of the bearing shell, fig. 3c is a bottom view of the bearing shell, and fig. 3d is a perspective view of the bearing shell.
Detailed Description
The invention will be described in more detail below by way of example with reference to the accompanying drawings:
with reference to fig. 1-3d, the present invention relates to a large-scale bearing bush integrated with a pressure sensor, which mainly comprises an alloy casting layer 1, a tin coating layer 2, a rigid backing layer 3, a sensor probe 4, and an external circuit.
The pressure sensor of piezoelectric ceramic type or Hall element type is cast in the bearing bush, and the finished product can integrate the lubrication of the bearing bush, the support of the crankshaft, the measurement of oil film pressure and the detection of oil film pressure distribution. The problem that the oil film pressure cannot be monitored on line in real time in the use process of the bearing bush products and the measurement precision is reduced due to the fact that the measurement precision and accuracy are damaged by the conventional oil film pressure measurement method can be solved at one time by the oil film pressure measuring device, and the gap of the bearing bush fault diagnosis industry is filled.
The product adopts an advanced manufacturing process, utilizes the characteristics of high temperature resistance and corrosion resistance of piezoelectric ceramics, firstly designs the pressure sensor probe to be light and thin, then intensively packages the sensor probe to be high temperature resistant and insulated, and finally installs the sensor probe on the mounting seat surface of the bearing bush sensor; the sensor probe outgoing line is led to an external amplifying circuit through the outside of the rigid back through hole after being insulated in a high temperature resistant mode, wherein an insulating ceramic guide pipe needs to be pre-buried in the rigid back material outer lead hole, temperature heat insulation treatment and electrical insulation treatment are carried out, and the situation that the insulating layer is damaged by the outer lead of the sensor probe due to vibration abrasion or the insulating layer of the outgoing line is burnt out due to overhigh casting preheating temperature is avoided.
The pressure sensor probe adopts an array of axially and circumferentially uniformly distributed sensor probes, the sensor probes are mainly uniformly distributed to test the oil film pressure on the whole bearing bush pressed surface, all the sensor probes are positioned below an alloy casting layer, the structure of the pressure sensor probe does not damage the surface roughness structure of the bearing bush alloy layer, the lubricating environment of a joint surface of a crankshaft and the bearing bush is not influenced, and the tested oil film pressure of the bearing bush and the oil film pressure distribution data have the highest accuracy and precision.
The sensor probe is cast under the bearing bush alloy layer, and the sensor probe and the bearing bush are organically combined together, so that the condition that lubricating oil is led out after a whole piece of bearing bush is drilled with a through hole when the oil film pressure is tested is avoided, the main body structure of the bearing bush is directly damaged when the pressure sensor is used for measuring the pressure, and the installation position of the sensor is extremely difficult to implement in engineering application. The bearing bush of the integrated sensor can be directly installed in a bearing bush seat hole, the installation position of the sensor does not need to be considered, the arrangement problem of the outer leads of the sensor does not need to be considered, the concentrated bearing bush leads the wire harnesses into an outer circuit for concentrated connection after unified wire harnesses of the wire harnesses, and the integrated sensor bearing bush is huge in structural engineering significance and wide in market prospect.
The lowest high temperature resistance of the piezoelectric ceramic or Hall element probe 4 is 500 ℃, wherein the tin coating temperature is 300 ℃, the alloy layer casting temperature is 420 ℃, the piezoelectric ceramic or Hall element probe adopts an encapsulation structure, and after the module is subjected to insulation encapsulation, a high bonding strength coating needs to be sprayed on the surface so that the module can not only resist high temperature and insulate, but also has good bonding strength with peripheral alloy
After the sensor probe is placed on the bearing bush rigid back layer, a tin coating process is required to be carried out on the inner surface of the sensor probe, and firstly, the tin coating layer has good tin-iron bonding strength, so that the sensor probe can be well fixed; secondly, the tin coating layer also has good bonding strength of the tin alloy layer, and the bonding force between the alloy layer and the rigid back junction can be enhanced; and finally, the temperature during tin coating is 300 ℃, a steel back workpiece can be preheated, the temperature difference during alloy layer casting is reduced, and the influence of alloy layer foaming and gas separation on the alloy layer bonding strength is avoided.
The insulating ceramic tube is embedded in a through hole of a sensor lead wire on the steel back, an outer lead wire of a sensor probe is led out of the tile back after passing through the insulating ceramic tube and enters an external amplifying circuit, the ceramic tube mainly protects the outer lead wire, and the phenomenon that the insulating layer is abraded by the whole vibration of equipment or the lead wire is oxidized due to overhigh heating and casting temperature of external alloy is avoided.
The sensor probes are uniformly arrayed in the axial direction and the circumferential direction, and are mainly distributed on a bearing bush pressure forming surface to monitor the pressure in the pressure forming surface area in real time.
And the sensor probe outgoing lines on the whole bearing bush pressing surface are finally led out and then are uniformly connected into an external circuit according to the measuring point sequence, and the oil film pressure distribution are displayed after the oil film pressure is stored, calculated and analyzed by an upper computer.
As can be seen from fig. 3, the large-sized bearing bush of the integrated pressure sensor is mainly divided into two parts, namely an upper bearing bush and a lower bearing bush, the upper bearing bush is mainly provided with an oil through hole and an oil passage, the lower bearing bush mainly plays a role in supporting a crankshaft and bearing impact load, the crankshaft starts to rotate under the pushing action of the pressure in the cylinder, the relative motion of the crankshaft and the bearing bush promotes the pressure of an oil film to rise, and a pressure-bearing area is formed in the area of the lower bearing bush, so that the sensor probes 3 are all located on the area of the lower bearing bush and are uniformly distributed in the axial direction, and the oil film pressure in the area.
The product is produced by adopting an integrated centrifugal casting mode, firstly, the array of the sensor probes 4 is arranged on the inner surface of the cylindrical rigid back 3, the stable and firm installation of each sensor probe is ensured, the inner surface of the cylindrical rigid back 3 is cleaned, decontaminated and air-dried, and the inner surface of the rigid back is ensured to be clean and pollution-free; secondly, a protective film is pasted on the outer surface of the cylinder steel back 3, a tin coating layer 2 is cast on the inner surface of the cylinder steel back by adopting a tin coating process, the thickness of the tin coating layer 2 is uniform, and the surface quality is smooth and clean without impurities; thirdly, casting alloy layer metal liquid such as bus alloy 1 and the like on the tin coating layer on the inner surface of the steel back 3, carrying out centrifugal casting on a centrifugal machine, and keeping the temperature, removing stress and cooling the whole product for later use; finally, a wire cutting machine is used for splitting the cylindrical steel back 3, the cylindrical steel back is processed into an upper bearing bush and a lower bearing bush, local details of the bearing bushes are processed until the bearing bushes are processed into finished bearing bush products, a lead-out wire is connected to a lead-out wire on the back of the steel back, signals are led out to a centralized charge amplifier, then the signals enter a large-scale bearing bush fatigue testing machine to carry out strength and fatigue tests, and whether each detection point can meet the testing precision and using requirements is checked.
Claims (3)
1. A large bearing bush integrated with a pressure sensor is characterized in that: the sensor probe array comprises an upper bearing bush and a lower bearing bush, wherein an upper rigid back layer is arranged on the upper bearing bush, an upper tin lining layer is cast on the inner surface of the upper rigid back layer by adopting a tin lining process, a lower rigid back layer is arranged on the lower bearing bush, a sensor probe array is arranged on the inner surface of the lower rigid back layer, a lower tin lining layer is cast on the inner surface of the lower rigid back layer by adopting a tin lining process, the sensor probes of the sensor probe array are positioned in the inner part of the lower tin lining layer, an alloy layer is centrifugally cast on the upper tin lining layer and the lower tin lining layer, an oil through hole and an oil passage are formed in the upper bearing bush, a lead hole is formed in the lower rigid back layer, a sensor probe outer lead of the sensor probe array is led.
2. The large bearing bush integrated with the pressure sensor as claimed in claim 1, wherein: the lead wire hole is an insulated ceramic conduit with temperature heat insulation and electrical insulation.
3. The large bearing bush integrated with the pressure sensor as claimed in claim 1 or 2, wherein: the sensor probes of the sensor probe array are uniformly arranged along the axial direction and the circumferential direction of the lower rigid back layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920640332.4U CN210265514U (en) | 2019-05-07 | 2019-05-07 | Large-scale bearing bush of integrated pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920640332.4U CN210265514U (en) | 2019-05-07 | 2019-05-07 | Large-scale bearing bush of integrated pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210265514U true CN210265514U (en) | 2020-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920640332.4U Withdrawn - After Issue CN210265514U (en) | 2019-05-07 | 2019-05-07 | Large-scale bearing bush of integrated pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210265514U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030271A (en) * | 2019-05-07 | 2019-07-19 | 哈尔滨工程大学 | A kind of large axle bush of integrated pressure sensor |
-
2019
- 2019-05-07 CN CN201920640332.4U patent/CN210265514U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030271A (en) * | 2019-05-07 | 2019-07-19 | 哈尔滨工程大学 | A kind of large axle bush of integrated pressure sensor |
| CN110030271B (en) * | 2019-05-07 | 2023-12-19 | 哈尔滨工程大学 | Large-sized bush integrated with pressure sensor |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200407 Effective date of abandoning: 20231219 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200407 Effective date of abandoning: 20231219 |