An online synchronous detection device for oil cleanliness and viscosity and its working method

Abstract

The present invention discloses an online synchronous detection device for oil cleanliness and viscosity, comprising a shell, a micro constant power motor, a rotating shaft, blades, a reflective photoelectric detection device, and a controller. The left end of the shell is provided with an end cover, the right end of the shell is provided with a partition, the left end of the rotating shaft is connected to the micro constant power motor, the blades are arranged at the right end of the rotating shaft, and the reflective photoelectric detection device comprises a light-emitting element, a photoelectric sensing element, and a reflective sheet. The light-emitting element and the photoelectric sensing element are respectively arranged on the inner wall of the shell, the reflective sheet is evenly arranged on the rotating shaft, and the controller is arranged on the outside of the shell. Its working method: (1) Install the above-mentioned online synchronous detection device in the screw hole of the oil tank; (2) Start the controller to start working; (3) The micro constant power motor drives the rotating shaft to rotate, the blades and the reflective sheet follow the rotation, the light-emitting element emits light, the reflective sheet reflects light, and the photoelectric sensing element measures the luminous flux. F and reflected light sensing cycle T signal, the controller displays the oil viscosity and cleanliness.

Description

Technical Field

[0001] The invention relates to an online synchronous detection device for oil cleanliness and viscosity and a working method thereof. Background Art

[0002] The hydraulic system requires strong sealing, high precision in parts manufacturing and assembly, poor resistance to working fluid contamination, and potential leakage. Once a hydraulic system fails, its form is often hidden, diverse, and complex. Therefore, online detection of hydraulic system status parameters is particularly important.

[0003] Each component and oil in the hydraulic system works in a closed oil circuit, which is not as intuitive as mechanical equipment, nor can it be easily measured by various testing instruments like electrical equipment. The hydraulic system relies on pressure gauges and temperature gauges to monitor the operation of the system, but it is difficult to accurately reflect the changes in other parameters. In addition, there are many factors that may cause the root cause of hydraulic system failure, which brings certain difficulties to the diagnosis of hydraulic system failure.

[0004] The viscosity and cleanliness of the oil have a significant impact on the hydraulic system. The viscosity and cleanliness of the hydraulic oil are required to be within a certain threshold when the system is working. When the viscosity is too high, it may cause oil circuit blockage, slow equipment response, sluggish movement and other faults; when the viscosity is too low, it may cause leakage, temperature rise, hydraulic component wear and jamming. Similarly, the cleanliness of hydraulic oil also plays an important role in the normal operation of the hydraulic system. Excessive concentration of solid particle contaminants in the oil used in agricultural machinery will aggravate the wear of machinery and equipment, and debris may cause oil circuit blockage, jamming of parts in the oil circuit and other faults, reducing the service life of the equipment. Therefore, online detection of oil quality needs to be solved urgently.

[0005] Use new content

[0006] The technical problem to be solved by the present invention is to provide an online synchronous detection device for oil cleanliness and viscosity and a working method thereof. The online synchronous detection device for oil cleanliness and viscosity and a working method thereof can not only perform online synchronous detection of the cleanliness and viscosity of the hydraulic oil in the hydraulic system, but also ensure the detection efficiency and measurement accuracy of the oil cleanliness and viscosity, thereby ensuring the efficient and smooth operation of the system where the oil is located.

[0007] In order to solve the above technical problems, the present invention provides an online synchronous detection device for oil cleanliness and viscosity, which comprises a shell, a micro constant power motor, a rotating shaft, blades, a reflective photoelectric detection device and a controller. The shell is a tubular structure, the outer surface of the shell is provided with a thread, the left end of the shell is provided with an end cover, the end cover is provided with a through hole, the right end of the shell is provided with an end plate, the center of the end plate is provided with an axial hole, the end plate is provided with an oil inlet hole, the inside of the shell is provided with a perforated plate, and the circumferential surface of the shell on the left side of the perforated plate is provided with an oil outlet hole, the left end of the rotating shaft passes through the through hole of the end cover and forms a sealed rotation connection with the through hole of the end cover, the left end of the rotating shaft is connected to the output shaft of the micro constant power motor through a coupling, the micro constant power motor is arranged on the end cover, and the rotating shaft The right end portion is rotationally connected with the shaft hole of the end plate, the blade is arranged on the right end of the rotating shaft, the rotating shaft passes through the hole of the orifice plate, and a gap is left between the rotating shaft and the hole of the orifice plate, and a spacing is left between the orifice plate and the end plate. A detection cavity is formed between the inner wall of the shell and the orifice plate, the end plate and the rotating shaft. The reflective photoelectric detection device contains a light-emitting element, a photoelectric sensing element and a reflective sheet. The light-emitting element and the photoelectric sensing element are respectively arranged on the inner wall of the shell located in the detection cavity, and the reflective sheet is evenly arranged on the rotating shaft located in the detection cavity. The reflective sheet corresponds to the light-emitting element and the photoelectric sensing element. The light-emitting element and the photoelectric sensing element are connected to the controller through wires. The controller is arranged on the outside of the end cover of the shell, and the controller includes a display.

[0008] There are six reflective sheets evenly distributed on the rotating shaft.

[0009] The blades include a sleeve and rotating blades. The rotating blades are evenly arranged on the sleeve and are of a straight plate structure.

[0010] There are three rotating blades evenly distributed on the sleeve.

[0011] At least two oil inlet holes are evenly distributed on the end plate.

[0012] At least two oil outlet holes are evenly distributed on the peripheral surface of the shell body on the left side of the orifice plate.

[0013] Based on the above-mentioned online synchronous detection device for oil cleanliness and viscosity, the present invention also provides a working method of the online synchronous detection device for oil cleanliness and viscosity, comprising the following steps:

[0014] (1) The thread of the housing of the online synchronous detection device for oil cleanliness and viscosity is installed in the screw hole provided in the oil tank of the hydraulic system, and the housing is located in the oil of the oil tank:

[0015] (2) Start the controller and start working;

[0016] (3) The micro constant power motor drives the rotating shaft to rotate, and the blades and reflective sheet rotate along with the rotating shaft. The controller controls the light emitting element to emit light in real time, and the reflective sheet reflects light. The photoelectric sensing element measures the characteristic signals of the light flux Φ and the reflected light sensing period T in real time. After being processed by the controller, the information of the oil viscosity and cleanliness is displayed;

[0017] For oil viscosity, when the blade rotates in the oil, the light emitted by the light-emitting element measured by the photoelectric sensing element is reflected by the reflective sheet and reaches the photoelectric sensing element. The reflected light sensing period T is combined with the torque M of the micro constant power motor, and the oil viscosity η is expressed as

[0018] η=kMT

[0019] Where k is the viscosity conversion coefficient,

[0020] After the above signals are processed by the controller, the viscosity information of the oil is displayed;

[0021] For the cleanliness of the oil, the photoelectric sensing element measures the luminous flux Φ of the light emitted by the light-emitting element and reflected by the reflective sheet to the photoelectric sensing element.

[0022] Assuming that the area of ​​the reflective sheet is S, the cleanliness is Sa, the wavelength is λ, the sensitivity is K, and V(λ) is the visibility function, then the wavelength λ and the sensitivity K are sensed by the photoelectric sensing element 4b and converted into a luminous flux Φ through signal processing, which can be expressed by the formula:

[0023]

[0024] The cleanliness Sa is

[0025] Sa=s·Φ

[0026] Where s is the cleanliness conversion coefficient,

[0027] After the above signals are processed by the controller, the viscosity information of the oil is displayed;

[0028] (4) Based on the above-mentioned real-time measured reflected light sensing period T and light flux Φ, after controller signal processing, it is displayed as oil viscosity and cleanliness information, thereby realizing online synchronous detection of oil cleanliness and viscosity.

[0029] The beneficial effect of the present invention is that the blade is driven to rotate in the oil by a micro constant power motor, and the reflective photoelectric detection device emits light in real time through the light-emitting element, which is reflected by the reflective sheet, and the photoelectric sensing element measures the light flux Φ and the characteristic signal of the reflected light sensing period T in real time. After being processed by the controller, the information of the oil viscosity and cleanliness is displayed in real time and synchronously, thereby realizing real-time detection of the cleanliness and viscosity of the hydraulic oil. At the same time, since the information of the oil viscosity and cleanliness is displayed in real time and synchronously, the detection efficiency and measurement accuracy of the oil cleanliness and viscosity are guaranteed, so that the system where the oil is located can run efficiently and smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of an online synchronous detection device for oil cleanliness and viscosity of the present invention;

[0031] Figure 2 It is a structural decomposition diagram of an online synchronous detection device for oil cleanliness and viscosity of the present invention;

[0032] Figure 3 yes Figure 2 Schematic diagram of the relative positions of the light emitting element, the photoelectric sensing element, the reflective sheet and the rotating axis in the A direction;

[0033] Figure 4 yes Figure 3 Top view of the light-emitting element, photoelectric sensing element, reflector and rotating shaft:

[0034] Figure 5 yes Figure 3 Left view of the light-emitting element, photoelectric sensing element, reflective sheet and rotating shaft:

[0035] Figure 6 The present invention is a flow chart for detecting the cleanliness and viscosity of oil. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0037] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Please refer to Figure 1-5 As shown, the present invention provides an online synchronous detection device for oil cleanliness and viscosity, which includes a housing 3, a micro constant power motor 1, a rotating shaft 6, a blade 5, a reflective photoelectric detection device and a controller. The housing 3 is a tubular structure, and the outer surface of the housing 3 is provided with a thread. The left end of the housing 3 is provided with an end cover 2, and the end cover 2 is provided with a through hole. In order to facilitate assembly and disassembly, a hexagonal structure or other structures that can facilitate assembly and disassembly can be provided on the outer circumference of the end cover 2. An end plate 4 is installed on the right end of the housing 3, and an axial hole is provided in the center of the end plate 4, and an oil inlet hole 7 is provided on the end plate 4. An external thread can be provided on the outer circumference of the end plate 4, and an internal thread can be provided on the inner surface of the right end of the housing 3. The external circumference of the end plate 4 can also be installed in the inner surface of the right end of the housing 3 by interference. The end plate 4 can also be installed on the right end of the housing 3 in other ways. An orifice plate 13 is provided inside the housing 3, and an oil outlet hole 8 is provided on the circumference of the housing 3 on the left side of the orifice plate 13. The orifice plate 13 provided inside the housing 3 can be made into an integral structure with the housing 2. The left end of the rotating shaft 6 passes through the through hole of the end cover 2 and forms a sealed rotation connection with the through hole of the end cover 2. The left end of the rotating shaft 6 can form a sealed rotation connection with the through hole of the end cover 2 through a labyrinth structure and a sealing ring. Since it is a prior art, it is not described in detail. The left end of the rotating shaft 6 is connected to the output shaft of the micro constant power motor 1 through a coupling 9. The micro constant power motor 1 is arranged on the end cover 2. The right end of the rotating shaft 6 forms a rotation connection with the axial hole of the end plate 4, that is, the right end of the rotating shaft 6 is directly installed in the axial hole of the end plate 4, and the right end of the rotating shaft 6 can rotate in the axial hole of the end plate 4. The blade 5 is arranged on the right end of the rotating shaft 6. The rotating shaft 6 passes through the hole of the orifice plate 13, and a gap is left between the rotating shaft 6 and the hole of the orifice plate 13. There is a gap between the orifice plate 13 and the end plate 4, and a detection cavity is formed between the inner wall of the shell 2 and the orifice plate 13, the end plate 4 and the rotating shaft 6, that is, the detection cavity is a torus structure formed by the inner wall of the shell 2, the right end face of the orifice plate 13, the left end face of the end plate 4 and the outer surface of the rotating shaft 6. Figure 3-5As shown, the reflective photoelectric detection device contains a light-emitting element 10, a photoelectric sensing element 11 and a reflector 12. The light-emitting element 10 and the photoelectric sensing element 11 are respectively arranged on the inner wall of the shell 3 located in the detection cavity, and the reflector 12 is evenly arranged on the rotating shaft 6 located in the detection cavity. The reflector 12 corresponds to the light-emitting element 10 and the photoelectric sensing element 11, that is, the light emitted by the light-emitting element 10 can be reflected by the reflector 12 and received by the photoelectric sensing element 11. The reflector 12, the light-emitting element 10 and the photoelectric sensing element 11 are all prior arts. The light-emitting element 10 and the photoelectric sensing element 11 are connected to the controller through wires. The controller is arranged on the outer side of the end cover 2 of the shell 3, and the controller includes a display. The display is used to display the cleanliness and viscosity of the oil.

[0040] To further improve the detection accuracy, the number of the reflective sheets 12 evenly arranged on the rotating shaft 6 is six. In this embodiment, the number of the reflective sheets 12 evenly arranged on the rotating shaft 6 is six.

[0041] In order to simplify the structure and reduce the manufacturing cost, the blade 5 includes a sleeve and a rotating blade. The rotating blade is evenly arranged on the sleeve and has a straight plate structure. Since the rotating blade of the straight plate structure is subjected to a greater viscous resistance of the oil when rotating in the oil, the viscosity detection value of the oil is more accurate.

[0042] To optimize the structure, there are three rotating blades evenly distributed on the sleeve.

[0043] In order to make the detection oil fully contact with the detection device, at least two oil inlet holes 7 are evenly distributed on the end plate 4 .

[0044] In order to make the detection oil fully contact with the detection device, at least two oil outlet holes 8 are evenly distributed on the peripheral surface of the shell 3 on the left side of the orifice plate 13.

[0045] Based on the above-mentioned online synchronous detection device for oil cleanliness and viscosity, the present invention also provides a working method of the online synchronous detection device for oil cleanliness and viscosity, see Figure 6 , including the following steps:

[0046] (1) The thread of the housing 3 of the online synchronous detection device for oil cleanliness and viscosity is installed in the screw hole provided in the oil tank of the hydraulic system, and the housing 3 is located in the oil of the oil tank:

[0047] (2) Start the controller and start working;

[0048] (3) The micro constant power motor 1 drives the rotating shaft 6 to rotate, and the blades 5 and the reflective sheet 12 rotate along with the rotating shaft. The controller controls the light emitting element 10 to emit light in real time, and the reflective sheet 12 reflects light. The photoelectric sensing element 11 measures the characteristic signals of the light flux Φ and the reflected light sensing period T in real time, and after being processed by the controller, the information of the oil viscosity and cleanliness is displayed;

[0049] As for the oil viscosity, when the blade 5 rotates in the oil, the light emitted by the light emitting element 10 is measured by the photoelectric sensing element 11, which is reflected by the reflective sheet 12 and reaches the photoelectric sensing element 11. The reflected light sensing period T is combined with the torque M of the micro constant power motor 1, and the oil viscosity η is expressed as

[0050] η=kMT

[0051] Where k is the viscosity conversion coefficient,

[0052] After the above signals are processed by the controller, the viscosity information of the oil is displayed;

[0053] For the cleanliness of the oil, the photoelectric sensing element 11 measures the luminous flux Φ of the light emitted by the light emitting element 10 and reflected by the reflective sheet 12 to the photoelectric sensing element 11.

[0054] Assuming that the area of ​​the reflective sheet 12 is S, the cleanliness is Sa, the wavelength is λ, the sensitivity is K, and V(λ) is the visibility function, then the wavelength λ and the sensitivity K are sensed by the photoelectric sensing element 4b and converted into a luminous flux Φ through signal processing, which can be expressed by the formula:

[0055]

[0056] The cleanliness Sa is

[0057] Sa=a·Φ

[0058] Where s is the cleanliness conversion coefficient,

[0059] After the above signals are processed by the controller, the viscosity information of the oil is displayed.

[0060] (4) Based on the above-mentioned real-time measured reflected light sensing period T and light flux Φ, after controller signal processing, it is displayed as oil viscosity and cleanliness information, thereby realizing online synchronous detection of oil cleanliness and viscosity.

[0061] The above-mentioned online synchronous detection device for oil cleanliness and viscosity drives the blade 5 to rotate in the oil through the micro constant power motor 1, and the reflective photoelectric detection device emits light in real time through the light emitting element 10, which is reflected by the reflective sheet 12, and the photoelectric sensing element 11 measures the light flux Φ and the characteristic signal of the reflected light sensing period T in real time. After being processed by the controller, the information of oil viscosity and cleanliness is displayed in real time and synchronously, thereby realizing real-time detection of the cleanliness and viscosity of the hydraulic oil. The real-time synchronous display of the information of oil viscosity and cleanliness ensures the detection efficiency and measurement accuracy of the oil cleanliness and viscosity.

[0062] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An online synchronous detection device for oil cleanliness and viscosity, characterized in that: It contains a shell, a micro constant power motor, a rotating shaft, blades, a reflective photoelectric detection device and a controller. The shell is a tubular structure, the outer surface of the shell is provided with threads, the left end of the shell is provided with an end cover, the end cover is provided with a through hole, the right end of the shell is provided with an end plate, the center of the end plate is provided with an axial hole, the end plate is provided with an oil inlet hole, the inside of the shell is provided with a perforated plate, and the circumferential surface of the shell on the left side of the perforated plate is provided with an oil outlet hole, the left end of the rotating shaft passes through the through hole of the end cover and forms a sealed rotation connection with the through hole of the end cover, the left end of the rotating shaft is connected to the output shaft of the micro constant power motor through a coupling, the micro constant power motor is arranged on the end cover, and the right end of the rotating shaft is rotatably connected with the axial hole of the end plate. The blade is arranged on the right end of the rotating shaft, the rotating shaft passes through the hole of the orifice plate, and a gap is left between the rotating shaft and the hole of the orifice plate, and a spacing is left between the orifice plate and the end plate. A detection cavity is formed between the inner wall of the shell and the orifice plate, the end plate and the rotating shaft. The reflective photoelectric detection device contains a light-emitting element, a photoelectric sensing element and a reflective sheet. The light-emitting element and the photoelectric sensing element are respectively arranged on the inner wall of the shell located in the detection cavity. The reflective sheet is evenly arranged on the rotating shaft located in the detection cavity. The reflective sheet corresponds to the light-emitting element and the photoelectric sensing element. The light-emitting element and the photoelectric sensing element are connected to the controller through wires. The controller is arranged on the outside of the end cover of the shell, and the controller includes a display.

2. The on-line synchronous detection device for oil cleanliness and viscosity according to claim 1, characterized in that: There are six reflective sheets evenly distributed on the rotating shaft.

3. The on-line synchronous detection device for oil cleanliness and viscosity according to claim 1 is characterized in that: The blades include a sleeve and rotating blades. The rotating blades are evenly arranged on the sleeve and are of a straight plate structure.

4. The on-line synchronous detection device for oil cleanliness and viscosity according to claim 3 is characterized in that: There are three rotating blades evenly distributed on the sleeve.

5. The on-line synchronous detection device for oil cleanliness and viscosity according to claim 1 is characterized in that: At least two oil inlet holes are evenly distributed on the end plate.

6. The on-line synchronous detection device for oil cleanliness and viscosity according to claim 1 is characterized in that: At least two oil outlet holes are evenly distributed on the peripheral surface of the shell body on the left side of the orifice plate.

7. A working method of an online synchronous detection device for oil cleanliness and viscosity, comprising the following steps: (1) The thread of the housing of the online synchronous detection device for oil cleanliness and viscosity is installed in the screw hole provided in the oil tank of the hydraulic system, and the housing is located in the oil of the oil tank: (2) Start the controller and start working; (3) The micro constant power motor drives the rotating shaft to rotate, and the blades and reflective sheet rotate along with the rotating shaft. The controller controls the light emitting element to emit light in real time, and the reflective sheet reflects light. The photoelectric sensing element measures the characteristic signals of the light flux Φ and the reflected light sensing period T in real time. After being processed by the controller, the information of the oil viscosity and cleanliness is displayed; For oil viscosity, when the blade rotates in the oil, the photoelectric sensing element measures the light emitted by the light-emitting element, which is reflected by the reflective sheet to the photoelectric sensing element. The reflected light sensing period T, combined with the miniature constant power motor torque M, the oil viscosity η is expressed as η = kMT Where k is the viscosity conversion coefficient, After the above signals are processed by the controller, the viscosity information of the oil is displayed; For the cleanliness of the oil, the photoelectric sensing element measures the luminous flux Φ of the light emitted by the light-emitting element and reflected by the reflective sheet to the photoelectric sensing element. Assuming that the area of ​​the reflective sheet is S, the cleanliness is Sa, the wavelength is λ, the sensitivity is K, and V(λ) is the visibility function, then the wavelength λ and the sensitivity K are sensed by the photoelectric sensing element 4b and converted into a luminous flux Φ through signal processing, which can be expressed by the formula: Then the cleanliness Sa is Sa=s·Φ Where s is the cleanliness conversion coefficient, After the above signals are processed by the controller, the viscosity information of the oil is displayed; (4) Based on the above-mentioned real-time measured reflected light sensing period T and light flux Φ, after controller signal processing, it is displayed as oil viscosity and cleanliness information, thereby realizing online synchronous detection of oil cleanliness and viscosity.

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