CN113702059A - Lubricating oil filter for gas turbine - Google Patents
Lubricating oil filter for gas turbine Download PDFInfo
- Publication number
- CN113702059A CN113702059A CN202111093713.3A CN202111093713A CN113702059A CN 113702059 A CN113702059 A CN 113702059A CN 202111093713 A CN202111093713 A CN 202111093713A CN 113702059 A CN113702059 A CN 113702059A
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- lubricating oil
- filter
- width
- pipeline
- filter screen
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- 239000010687 lubricating oil Substances 0.000 title claims abstract description 143
- 238000001514 detection method Methods 0.000 claims abstract description 21
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 239000003921 oil Substances 0.000 claims description 64
- 239000002184 metal Substances 0.000 claims description 49
- 239000000314 lubricant Substances 0.000 claims description 27
- 238000007789 sealing Methods 0.000 claims description 16
- 239000004020 conductor Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 description 21
- 230000008859 change Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 7
- 230000005291 magnetic effect Effects 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000001050 lubricating effect Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010723 turbine oil Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
- G01M15/00—Testing of engines
- G01M15/14—Testing gas-turbine engines or jet-propulsion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/06—Arrangements of bearings; Lubricating
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention discloses a lubricating oil filter for a gas turbine, which comprises a lubricating oil outlet pipeline for guiding lubricating oil to flow out of the lubricating oil filter, a lubricating oil inlet pipeline for guiding the lubricating oil to enter the lubricating oil filter, a filter screen for filtering the lubricating oil flowing through the lubricating oil filter, wherein the filter screen is arranged between the lubricating oil inlet pipeline and the lubricating oil outlet pipeline, the filter screen is attached with scraps obtained by filtering the lubricating oil, and the lubricating oil filter also comprises a detection device for detecting the scraps attached to the filter screen. The situation of the scraps in the lubricating oil can be detected by detecting the scraps attached to the filter screen, so that the possibility of failure of the mechanical structure of the gas turbine can be known in time.
Description
Technical Field
The invention relates to the field of gas turbines, in particular to a lubricating oil filter of a gas turbine.
Background
In order to ensure normal operation of the rotor and the bearing and avoid abrasion in the operation process of the gas turbine, a lubricating oil system is usually arranged in the gas turbine, and lubricating oil flows through the working positions of the rotor and the bearing through the lubricating oil system, so that the lubricating effect is achieved. Scraps may be generated in the operation process of the rotor and the bearing, and a lubricating oil filter is usually arranged in a lubricating oil system, so that metal scraps and large non-magnetic metal scraps in the lubricating oil system are filtered by the lubricating oil filter, and the phenomenon that the scraps influence the normal operation of the gas turbine is further avoided.
When mechanical structures such as rotors and bearings in gas turbines fail, the gas turbine, once operating in the presence of the failure, may wear the mechanical structures to produce a large amount of debris. In the prior art, a technical scheme for detecting whether a mechanical structure of a gas turbine fails or not by detecting the amount of metal scraps in an oil lubricating system in real time is provided. In the prior art, when the amount of the metal scraps is detected, the amount of the metal scraps in the lubricating oil liquid is directly detected mainly by arranging a detection element in the lubricating oil system. The scheme for detecting the amount of the metal chips is irrelevant to the lubricating oil filter, and the lubricating oil filter can only achieve the effect of simply filtering the metal chips.
For example, a micro-inductive sensor for detecting metal debris in oil is disclosed in the prior patent CN102147230A, which comprises a three-way pipe joint, a piston, a micro-coil, a PCB board, a welding wire, a bonding lead and an insulating layer. When the measurement is carried out, the LCR digital measuring instrument switches on alternating current to the micro-coil, when ferromagnetic metal debris passes through, the magnetic field is greatly enhanced because the magnetic conductivity of the ferromagnetic metal debris is far larger than 1, and the inductance change caused by the eddy current effect is relatively small, so that the measured inductance of the micro-coil is increased, and the change of the inductance value of the micro-coil is used for judging the size of the metal debris. However, the metal chips are scattered at different positions in the lubricating oil pipeline, a micro-coil is arranged at one position in the pipeline, and if the metal chips do not flow through the position but are scattered at other positions, the micro-coil is difficult to sense, so that the detection is not accurate.
The patent of prior patent CN103278560A discloses a simulation detection device for metal debris in flowing oil, and an air pressure speed control loop provides power to make an oil pool piston located in an upper oil pool press the oil in an oil pipeline to move. The micro-inductive eddy current sensor is fixedly connected in two three-way joints in the oil pipeline and is immersed in oil to detect suspended metal debris at different positions, and detection signals are recorded by the two impedance analyzers and are transmitted to the computer for processing. Although the oil is moved by air pressure, metal chips can still be left in the position of the lubricating oil pipeline where a detection device is not arranged, and the detection is inaccurate. In fact, a large amount of metal filings in the oil system will adhere in the oil filter. Therefore, a lubricating oil filter capable of detecting the amount of metal chips in lubricating oil in real time is lacked at present.
The present invention has been made in view of the above problems.
Disclosure of Invention
The invention mainly aims to provide a lubricating oil filter of a gas turbine, which aims to solve the problem that the prior art cannot utilize the lubricating oil filter to detect the amount of metal chips in lubricating oil in real time.
In order to achieve the above object, according to one aspect of the present invention, there is provided a lubricant filter for a gas turbine, including a lubricant outlet pipe guiding lubricant to flow out of the lubricant filter, a lubricant inlet pipe guiding lubricant to flow into the lubricant filter, a strainer filtering the lubricant flowing through the lubricant filter, the strainer being disposed between the lubricant inlet pipe and the lubricant outlet pipe, the strainer having attached thereto debris obtained by filtering the lubricant, and a detection device detecting the debris attached to the strainer. The scraps in the lubricating oil can be attached to the filter screen of the lubricating oil filter, and the condition of the scraps in the lubricating oil can be known by detecting the scraps attached to the filter screen, so that whether the mechanical structure in the gas turbine breaks down in the operation process is known.
Further, the detection device includes a measurement circuit configured as a circuit in which a current characterizing parameter varies with a change in the amount of metal debris adhering to the filter screen. The invention can detect the change of the quantity of the metal scraps attached to the filter screen through the measuring circuit so as to detect the condition of the scraps in the lubricating oil.
Further, the measuring device also comprises an insulating shell, and the measuring circuit is arranged in the insulating shell. Through setting up insulating casing in order to shield protection measuring circuit for when installation measuring circuit, only need set up insulating casing in the pipeline that the lubricating oil flows through, and need not carry out insulation treatment to the pipeline.
Furthermore, the filter screen and the insulating shell are sequentially arranged in a pipeline through which the lubricating oil flows along the flowing direction of the lubricating oil. The filter screen and the insulating shell are sequentially arranged in the pipeline through which the lubricating oil flows along the axial direction, so that the radial space of the pipeline occupied by the filter screen and the insulating shell is smaller, and the space is saved.
Further, the filter screen is a horn-shaped cylinder which is gradually narrowed along the flowing direction of the lubricating oil, one wider end of the two ends of the horn-shaped cylinder-shaped filter screen is provided with an opening, and the other end of the horn-shaped cylinder-shaped filter screen is closed; the insulating housing is disposed adjacent the closed end of the screen. The structure of filter screen is convenient for enlarge the area of contact lubricating oil, obtains better filter effect. And the filter screen and insulating casing's setting position for be convenient for measuring circuit contact filter screen and detect the adnexed metal bits end on the filter screen.
Further, the radial width of the opening of the filter screen is a first width, the radial width of the pipeline where the oil filter is located is a second width, and the first width is equal to the second width. The radial width of the openings of the filter screen is equal to the radial width of the pipeline, so that the openings of the filter screen penetrate through the pipeline through which the lubricating oil flows, and the lubricating oil flowing through the section of the pipeline can be filtered by the filter screen.
Further, the maximum radial width of the insulating housing is a third width, the radial width of the closed end of the filter screen is a fourth width, and the third width is equal to the fourth width.
Further, the filter screen and the insulating shell are arranged in the installation pipeline; the two ends of the mounting pipeline are respectively connected with the lubricating oil outlet pipeline and the lubricating oil inlet pipeline. When the lubricating oil filter is installed, the installation pipeline is connected with the lubricating oil outlet pipeline and the lubricating oil inlet pipeline, and the installation is convenient.
Furthermore, the mounting pipeline is detachably connected with the lubricating oil outlet pipe and the lubricating oil inlet pipeline. The removal of the lubricating oil filter is convenient, and the filter screen of the lubricating oil filter can be replaced.
Furthermore, an oil through hole for lubricating oil to flow through is formed in the mounting pipeline, so that the lubricating oil can flow through the oil through hole and flow through the lubricating oil filter.
Further, the measuring circuit includes a coil disposed adjacent to the screen, the coil having an impedance that varies with the amount of metal debris adhered to the screen. The quantity change of the metal scraps attached to the filter screen is sensed through the coil, so that the measuring circuit is simple in structure and convenient to process.
Furthermore, a plurality of groups of coils are arranged in the measuring circuit.
Further, the measuring circuit comprises a printed circuit board, and the printed circuit board is connected with the coil through a lead. The measuring circuit can be adjusted by means of the printed circuit board.
Furthermore, a current measuring element for detecting the current of the measuring circuit in real time is arranged in the printed circuit board. The current measuring element is arranged in the printed circuit board, so that the current of the measuring circuit can be conveniently detected.
Further, the lubricating oil filter comprises a shielding cable for supplying power to the measuring circuit, and the shielding cable is connected with the printed circuit board.
Furthermore, the shielding cable is inserted into a pipeline through which lubricating oil flows and connected with the printed circuit board, and a sealing plug is arranged at the position, in the pipeline through which the lubricating oil flows, where the shielding cable is inserted.
Furthermore, a sealing plug is arranged at the end part of the insulating shell for inserting the shielding cable. The sealing property of the lubricating oil pipeline is ensured by the arrangement of the sealing plug.
The lubricating oil filter for the gas turbine is provided with the detection device capable of detecting the scraps attached to the filter screen, and has the following advantages:
1. the chips at the filter screen of the lubricating oil filter can be gathered, and a detection device for detecting the chips attached to the filter screen is arranged in the lubricating oil filter, so that the chip condition of the lubricating oil flowing through the pipeline can be accurately obtained, and the mechanical structure of the gas turbine is timely detected and found to have faults in operation.
2. According to the lubricating oil filter, the content of the metal scraps attached to the filter screen is detected through the measuring circuit, so that the content of the scraps in the lubricating oil flowing through the pipeline is obtained, the setting structure of the measuring circuit is simple, and the metal scraps can be sensed only through setting the coil.
3. The measuring circuit is arranged in the insulating shell, so that the measuring circuit can obtain insulating isolation protection, and the pipeline does not need to be subjected to insulating treatment during installation, and the installation is convenient. In addition, the lubricating oil filter is arranged in the installation pipeline, so that the installation can be finished only by embedding and inserting the installation pipeline into the pipeline through which the lubricating oil flows, the pipeline through which the lubricating oil flows does not need to be modified, and the installation is convenient.
4. The positions where the power supply shielding cable line in the measuring circuit is connected with the pipeline are provided with the sealing plugs, so that the sealing property is ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic cross-sectional view of an oil filter of a gas turbine according to the invention.
There is shown a schematic isometric view of a gas turbine engine oil filter according to the present invention.
Wherein the figures include the following reference numerals:
1. a lubricant outlet conduit; 2. a lubricant inlet conduit; 3. filtering with a screen; 4. an insulating housing; 5. an opening; 6. a closed end; 7. installing a pipeline; 8. an oil through hole; 9. a coil; 10. a printed circuit board; 11. a wire; 12. shielding the cable wire; 13. and (6) sealing the plug.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The present invention is described in further detail below with reference to specific examples, which are not to be construed as limiting the scope of the invention as claimed.
Gas turbines are typically provided with an oil lubrication system for providing lubrication oil to the rotor, bearings, etc. of the gas turbine that are required to rotate. While the rotating mechanical structure can generate scraps when in operation, and the scraps can affect the normal operation of the gas turbine if flowing into the partial mechanical structure of the gas turbine, so a lubricating oil filter should be arranged in a lubricating oil system of the gas turbine, and the scraps in the lubricating oil system are filtered by the lubricating oil filter. Specifically, the lubricating oil filter of the gas turbine comprises a lubricating oil outlet pipeline 1 for guiding lubricating oil to flow out of the lubricating oil filter, a lubricating oil inlet pipeline 2 for guiding lubricating oil to enter the lubricating oil filter, and a filter screen 3 for filtering the lubricating oil flowing through the lubricating oil filter, wherein the filter screen 3 is arranged between the lubricating oil inlet pipeline 2 and the lubricating oil outlet pipeline 1. Namely, the lubricating oil filter mainly filters scraps in the lubricating oil system through a filter screen 3.
A large amount of debris is generated due to abnormal contact between rotating mechanical structures of the gas turbine if the rotating mechanical structures fail. In the prior art, a technical scheme for judging whether a rotating machine of a gas turbine breaks down or not by detecting the amount of scraps in an oil lubricating system is provided. But are primarily used to detect the amount of debris in the oil conduit by providing a detection device at a set location in the oil system. Since the chips may flow in any direction in the pipe through which they flow and part of the chips may fall at different positions in the pipe, it is not accurate to detect only the chips in the oil flowing in the pipe to determine whether the rotating machine is malfunctioning.
The invention provides a device for detecting the amount of the scraps in the lubricating oil filter to judge whether the rotating machine has a fault or not, and the scraps dispersed in the lubricating oil system can be gathered at the lubricating oil filter, so that the content of the scraps in the lubricating oil system can be relatively accurately reflected by detecting the scraps at the lubricating oil filter. Compared with the conventional method that the chip content in the lubricating oil flowing through a specific position in a pipeline through which the lubricating oil flows is detected in the lubricating oil system, the chip content in the lubricating oil system can be more accurately reflected. Specifically, the filter screen 3 of the oil filter is attached with chips obtained by filtering oil, and the oil filter further comprises a detection device for detecting the chips attached to the filter screen 3. Because a large amount of scraps are attached to the filter screen 3, the scraps amount of the filter screen 3 is detected, the detection of the detection device is facilitated, and the scraps in the lubricating oil system can be accurately reflected.
As shown in FIG. 1, the present invention detects debris primarily by a measurement circuit. In particular, the measuring circuit is configured as a circuit in which the current characterizing parameter varies as a function of the amount of metal debris adhering to the sieve 3. Because the parameters of the circuits such as current, voltage and the like are relatively convenient to measure, and the metal scraps have magnetism, the change of the metal scraps quantity inevitably causes the change of the voltage, the current and the like of the measuring circuit based on the principle of electromagnetic induction, and the voltage, the current and the like of the measuring circuit are relatively sensitive, so the invention provides that the metal scraps quantity attached to the filter screen 3 is detected by the measuring circuit. The measuring circuit can be configured as any type of circuit sensitive to electromagnetic induction, so as to reflect the amount of metal chips attached to the filter screen 3 by detecting the current value of the measuring circuit.
In particular, the measuring circuit of the invention comprises a coil 9 arranged close to the sieve 3, the impedance of the coil 9 varying as a function of the quantity of metal chips adhering to the sieve 3. When the amount of the metal scraps attached to the filter screen 3 has magnetism changes, the magnetic conductance changes, and the magnetic conductance is in direct proportion to the impedance of the coil 9, that is, the change of the amount of the metal scraps attached to the filter screen 3 changes the impedance of the coil 9, so that the current of the measuring circuit changes. According to the measuring circuit, the coil 9 is arranged, so that the sensitive reaction of the coil 9 to the change of the magnetic field can be utilized, the accurate detection of the amount of the metal scraps attached to the filter screen 3 is realized, and the measuring circuit is simple to arrange. The measuring circuit can also be used for detecting the quantity of the metal scraps attached to the filter screen 3 by arranging the plurality of groups of coils 9, and the influence of the quantity of the metal scraps attached to the filter screen 3 on the impedance of the measuring circuit can be amplified by arranging the plurality of groups of coils 9, so that the sensitivity of the detecting circuit on the metal scraps attached to the filter screen 3 is improved.
As shown in fig. 1, the measuring circuit comprises a printed circuit board 10, which printed circuit board 10 is connected to the coil 9 via a conductor 11. The specific structure of the measuring circuit can be adjusted through the printed circuit board 10, and further, the functional relationship between the current of the measuring circuit and the metal scraps attached to the filter screen 3 can be adjusted, so that the functional relationship can be adjusted to a circuit board which is convenient for calculating the current of the measuring circuit. Preferably, the printed circuit board 10 is provided with a current measuring element for detecting the current of the measuring circuit in real time, so that the current value of the measuring circuit can be obtained in time without external devices such as an ammeter and the like.
The measuring circuit needs to be isolated from lubricating oil and the like in a shielded environment so as to avoid the measuring circuit from being interfered by other signals to influence the accuracy of the current of the measuring circuit and avoid the lubricating oil and the like from damaging the measuring circuit after entering the measuring circuit. Therefore, the measuring device of the present application further comprises an insulating housing 4, and the measuring circuit is arranged in the insulating housing 4. Thus, when the oil filter is installed in the pipeline through which the oil flows, the insulating housing 4 is only required to be arranged in the pipeline, and the pipeline through which the oil flows does not need to be shielded, which is convenient for installation. If the measuring circuit is not provided in the insulating case, the pipe needs to be insulated when the measuring circuit is mounted.
Whereas for the pipe, the diameter is usually much smaller than its axial length, so that the sieve 3 and the insulating housing 4 can be arranged one after the other in the pipe through which the oil flows in the direction of oil flow in order to save radial space in the pipe. That is, if the filter screen 3 and the insulating housing 4 are sequentially and adjacently arranged along the axial direction of the lubricating oil pipeline, the filter screen 3 and the insulating housing 4 have an overlapping area along the axial direction of the pipeline, so that the radial space in the pipeline occupied by the filter screen 3 and the insulating housing 4 is smaller, and the radial space in the pipeline is saved.
As shown in fig. 1, the specific structure of the filter screen 3 is as follows: the filter net 3 is a trumpet-shaped cylinder which is gradually narrowed along the flowing direction of the lubricating oil, an opening 5 is arranged at the wider end of the two end parts of the trumpet-shaped cylinder-shaped filter net 3, and the other end is closed. The filter screen 3 is formed in a horn-shaped cylindrical structure, which is favorable for guiding the lubricating oil to flow through the filter screen 3. Preferably, the insulating shell 4 is arranged adjacent to the closed end 6 of the filter screen 3, and since the metal scraps attached to the filter screen 3 are mainly located at the closed end 6 of the filter screen 3, the insulating shell 4 is arranged adjacent to the closed end 6, so that a measuring circuit in the insulating shell 4 can detect the metal scraps attached to the filter screen 3 conveniently.
It is further preferred that the radial width of the opening 5 of the sieve 3 is equal to the radial width of the conduit through which the oil flows, i.e. the radial width of the opening 5 of the sieve 3 is a first width and the radial width of the conduit in which the oil filter is located is a second width, the first width being equal to the second width. The opening of the filter screen 3 is ensured to intercept all the sections of the pipeline where the lubricating oil flows through, and further the lubricating oil flowing through the pipeline at the position is ensured to be filtered by the filter screen 3.
It is further preferred that the radially largest width of the insulating housing 4 is a third width, and the radially width of the closed end 6 of the screen 3 is a fourth width, the third width being equal to the fourth width. Since the insulating housing 4 is provided for the purpose of accommodating a measuring circuit for detecting the amount of the metal chips attached to the filter 3, the measuring circuit and the insulating housing 4 need to be mainly and intensively arranged at a position close to the metal chips attached to the filter 3. As shown in fig. 1, the metal dust is mainly concentrated at the closed end 6 of the filter screen 3, so that the radial extension width of the measuring circuit only needs to be equal to the radial width of the closed end 6 of the filter screen 3. Therefore, in order to save materials, the maximum radial width of the insulating housing 4 with the built-in measuring circuit only needs to be equal to the radial width of the closed end 6 of the filter screen 3.
As shown in fig. 1, in order to facilitate the installation of the oil filter, the oil filter may be disposed in the installation pipe 7, so that when the oil filter is installed, the installation pipe 7 is simply inserted into a pipe through which oil flows. Specifically, the filter screen 3 and the insulating shell 4 are arranged in the installation pipeline 7; two ends of the mounting pipeline 7 are respectively connected with the lubricating oil outlet pipeline 1 and the lubricating oil inlet pipeline 2. Preferably, the diameter of the mounting tube 7 is set to coincide with the diameter of the tube through which the oil flows, so that the process of mounting the oil filter is practically equal to the distance over which the tube through which the oil flows extends.
Further preferably, the mounting pipe 7 is detachably connected with the oil outlet pipe 1 and the oil inlet pipe 2. For example, as shown in fig. 1, the mounting pipe 7 may be connected to the outer walls of the oil inlet pipe 2 and the oil outlet pipe 1 by bolts, so that the mounting pipe 7 may be conveniently assembled with and disassembled from the oil inlet pipe 2 and the oil outlet pipe 1, and the filter screen 3 may be conveniently taken out and replaced by disassembling the mounting pipe 7. The mounting pipeline 7, the lubricating oil outlet pipeline 1 and the lubricating oil inlet pipeline 2 can be connected through other structures which are convenient to mount and dismount, such as buckles and the like. And because the installation pipeline 7 is provided with the insulating shell 4, the lubricating oil inlet pipeline 2 and the lubricating oil outlet pipeline 1 which are connected with the installation pipeline 7 do not need to be subjected to insulating treatment or sealing treatment, and only need to be connected through bolts, so that the installation is convenient.
Since the mounting tube 7 serves to mount a lubricant filter which is preferably provided in a closed configuration at a position other than the position where the strainer 3 is required to be connected to a tube through which lubricant flows, and lubricant is required to flow through the mounting tube 7, it is preferable that an oil passage hole 8 through which lubricant flows is provided in the mounting tube 7, and lubricant can pass through the mounting tube 7 through the oil passage hole 8 relatively easily.
The measuring circuit requires a cable for power supply, and in order to ensure the shielding of the measuring circuit, a preferred cable is the shielded cable 12. The shielded cable 12 is first inserted into the conduit through which the oil flows, then into the insulating housing 4, and finally connected to the printed circuit board to supply power to the measurement circuit. In order to ensure the tightness of the oil flowing through the pipeline and the insulating shell 4, sealing plugs 13 are arranged at the positions where the shielding cable wires 12 penetrate. Specifically, the shielding cable 12 is inserted into a conduit through which the lubricant flows and connected to the printed circuit board 10, and a sealing plug 13 is disposed at a position in the conduit through which the shielding cable 12 is inserted. A sealing plug 13 is provided at an end portion of the insulating housing 4 into which the shielded electric cable 12 is inserted. That is, the lubricating oil filter for a gas turbine according to the present invention ensures not only the sealing performance by the insulating housing 4 and the mounting pipe 7, but also the sealing performance at the threading position by the sealing plug 13.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
1. according to the invention, the detection device capable of detecting the chips attached to the filter screen is arranged in the lubricating oil filter, so that the chips can be detected at the position where the chips in the pipeline through which the lubricating oil passes are gathered, and the real situation of the chips in the pipeline through which the lubricating oil flows can be more accurately reflected. Compared with the conventional method for detecting the chips in the lubricating oil flowing in the pipeline, the method for detecting the chips in the lubricating oil flowing in the pipeline has the advantages that the chips are likely to scatter at any position in the flowing process to cause inaccurate detection, and the chips in the pipeline can be more accurately reflected by detecting the concentrated chips. And the abnormal situation of the chip content in the pipeline can be found in time by detecting the chip content in the pipeline, so that the condition that the mechanical operation of the gas turbine breaks down can be known.
2. The detection device in the lubricating oil filter reflects the amount of the metal scraps attached to the filter screen through the measurement circuit, and the measurement circuit is only provided with the coil, so that the impedance can be changed through the coil along with the change of the amount of the metal scraps attached to the filter screen, and further the current is changed. The measuring circuit has a simple structure and can be sensitive to the change of the amount of metal scraps attached to the filter screen.
3. The measuring circuit is arranged on the insulating shell, so that the measuring circuit can be prevented from being interfered by external signals and the like through the insulating shell, and the measuring circuit can be prevented from being influenced by inflow of lubricating oil. When the measuring circuit is installed, the insulating shell is arranged in a pipeline through which lubricating oil flows, the original pipeline through which the lubricating oil flows does not need to be sealed or subjected to insulating treatment, and the measuring circuit is convenient to install.
4. The lubricating oil filter is arranged in the installation pipeline, so that when the lubricating oil filter is installed, the installation pipeline is connected with the original pipeline to realize the assembly of the lubricating oil filter, and the pipeline is more conveniently spliced and connected. And when the filter screen needs to be cleaned or replaced, the installation pipeline and the pipeline through which the original lubricating oil flows can be conveniently detached.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (17)
1. The utility model provides a lubricating oil filter for gas turbine, is including guide lubricating oil outflow lubricating oil outlet pipe way (1), guide lubricating oil entering lubricating oil inlet pipe way (2), the filtration of filtration flow through lubricating oil filter's filter screen (3), filter screen (3) set up lubricating oil inlet pipe way (2) with between lubricating oil outlet pipe way (1), its characterized in that, be attached to on filter screen (3) and filter the bits that the lubricating oil obtained, lubricating oil filter is still including detecting filter screen (3) are last attached to the detection device of bits.
2. The lubricant filter according to claim 1, characterized in that said detection means comprise a measuring circuit configured as a circuit whose current-characterizing parameters vary as a function of the quantity of metal chips adhering to said sieve (3).
3. The oil filter of claim 2, wherein the measuring device further comprises an insulating housing (4), the measuring circuit being disposed within the insulating housing (4).
4. -oil filter according to claim 3, characterised in that said sieve (3), said insulating casing (4) are arranged in succession in the conduit through which the oil flows, in the direction of flow of the oil.
5. The lubricating oil filter according to claim 4, wherein the strainer (3) is provided as a trumpet-shaped cylinder which is gradually narrowed in the direction of flow of the lubricating oil, and the wider one of both end portions of the trumpet-shaped cylinder-shaped strainer (3) is provided with an opening (5) and the other end is closed;
the insulating shell (4) is adjacent to the closed end (6) of the filter screen (3).
6. -oil filter according to claim 5, characterised in that the radial width of the openings of the sieve (3) is a first width and the radial width of the duct in which the oil filter is located is a second width, the first width being equal to the second width.
7. The oil filter according to claim 5, characterized in that the radially maximum width of the insulating casing (4) is a third width and the radial width of the closed end (6) of the sieve (3) is a fourth width, the third width being equal to the fourth width.
8. The oil filter according to any of claims 3 to 7, characterized in that said sieve (3), said insulating casing (4) are arranged in a mounting duct (7); and two ends of the mounting pipeline (7) are respectively connected with the lubricating oil outlet pipeline (1) and the lubricating oil inlet pipeline (2).
9. The oil filter according to claim 8, characterized in that the mounting pipe (7) is detachably connected with the oil outlet pipe (1), the oil inlet pipe (2).
10. The lubricating oil filter according to claim 8, characterised in that an oil passage hole (8) through which lubricating oil flows is provided in the mounting duct (7).
11. The lubricant filter according to any one of claims 2 to 7, characterized in that said measuring circuit comprises a coil (9) arranged close to said sieve (3), the impedance of said coil (9) varying as a function of the amount of metal filings adhering to said sieve (3).
12. -oil filter according to claim 11, characterised in that a plurality of sets of said coils (9) are provided in said measuring circuit.
13. The lubricant filter according to claim 11, characterized in that the measuring circuit comprises a printed circuit board (10), the printed circuit board (10) being connected to the coil (9) by means of a conductor (11).
14. The lubricant filter according to claim 13, characterized in that a current-measuring element is provided in the printed circuit board (10) which detects the current of the measuring circuit in real time.
15. The oil filter of claim 13, characterized in that it comprises shielded electric cables (12) for supplying power to said measuring circuit, said shielded electric cables (12) being connected to said printed circuit board (10).
16. The lubricant filter according to claim 15, characterized in that the shielded cable (12) is inserted in a conduit through which the lubricant flows and is connected to the printed circuit board (10), a sealing plug (13) being provided in the conduit through which the lubricant flows at the location where the shielded cable (12) is inserted.
17. The lubricating oil filter according to claim 15, characterised in that the end of the insulating casing (4) in which the shielded electric cables (12) are inserted is provided with a sealing plug (13).
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| CN202111093713.3A CN113702059A (en) | 2021-09-17 | 2021-09-17 | Lubricating oil filter for gas turbine |
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| CN202111093713.3A CN113702059A (en) | 2021-09-17 | 2021-09-17 | Lubricating oil filter for gas turbine |
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