Differential rotor of rotary online viscosity sensor

Abstract

The invention discloses a differential rotor of a rotary online viscosity sensor. The differential rotor comprises a rotating drum, a bearing, a rotating shaft, a torsion elastic piece and an angle measuring part, the rotary drum is of a hollow thin-wall rotary shell structure, the bottom of the rotary drum is closed, the upper portion of the rotary drum is open and provided with a supporting ring, and the inner side of the rotary drum is connected with the outer side of the torsional elastic piece through the supporting ring; the bearing is mounted at the bottom or / and top of the inner side of the drum through a bearing seat; the rotating shaft is mounted in an inner hole of the bearing, is coaxial with a rotating shaft of the rotating drum and is connected with the inner side of the torsional elastic piece through a shaft sleeve; the peripheral wall of the rotary drum is in contact with measured liquid, and the torsional elastic piece and the bearing are both located in the rotary drum and isolated from the measured liquid; and the angle measuring parts are respectively arranged on the rotating drum and the rotating shaft to obtain the viscosity of the measured liquid. The device has the advantages of high viscosity measurement precision and accuracy, no problem of long reset time and low response speed, greatly prolongs the service life of equipment, and is particularly suitable for being applied to the environment of on-line viscosity measurement in a production field.

Description

Technical Field

[0001] This invention relates to the field of industrial testing, and in particular to a differential rotor for a rotary online viscosity sensor. Background Technology

[0002] In recent years, the battery industry has developed rapidly, creating an increasing demand for high-performance equipment capable of accurately measuring changes in slurry viscosity online. While rotational viscometers are widely used for fluid viscosity measurement, they are primarily suitable for offline measurements in laboratory environments. The problem lies in the fact that the rotor of a traditional rotational viscometer needs to be immersed in the slurry for testing. The rotor design cannot achieve sealing and corrosion resistance, thus making it unsuitable for online slurry viscosity measurement applications.

[0003] Patent (CN202411474612.4) proposes a specially designed suspended rotor. This design effectively solves the problem of online fluid viscosity measurement using a rotational viscometer by utilizing the rotational phase difference between a reference rotor and the suspended rotor. However, it has the following problems: First, there is an axial misalignment between the rotor and the shaft, which prevents the rotor axis from being completely perpendicular to the ground. This phenomenon introduces viscosity measurement errors and reduces the accuracy of viscosity measurement. Second, when the viscosity of the measured liquid is high, the suspended rotor takes a long time to return to the center measurement position, affecting the sensor's response speed and resulting in a long reset time. Third, its torsional elastic components and other parts are exposed to the detection environment and are susceptible to corrosion from the volatile gases of the measured liquid, reducing the service life of the equipment. Fourth, the need to continuously adjust the counterweight to suit different measured liquids leads to long debugging and maintenance times, affecting the continuity of testing and production efficiency. Summary of the Invention

[0004] To address one or more of the above-mentioned problems, the present invention provides a differential rotor for a rotary online viscosity sensor.

[0005] According to one aspect of the present invention, a rotary online viscosity sensor differential rotor includes: a rotating drum, a bearing, a rotating shaft, a torsional elastic element, and an angle measuring component; The rotating cylinder is a hollow, thin-walled rotating shell structure. The bottom of the rotating cylinder is closed, the top is open, and a support ring is provided at the top. The inner side of the rotating cylinder is connected to the outer side of the torsion elastic element through the support ring. The bearing is mounted on the bottom or top of the inner side of the rotating drum via a bearing housing; The rotating shaft is installed in the inner hole of the bearing and is coaxial with the rotation shaft of the rotating drum. The rotating shaft is connected to the inner side of the torsional elastic element through the bushing. The outer peripheral wall of the rotating drum is in contact with the liquid being tested, while the torsional elastic element and bearing are located inside the rotating drum and isolated from the liquid being tested. Angle measuring components are installed on the rotating drum and the rotating shaft respectively. By using external optical, electrical or magnetic measuring devices, the angular change or phase difference between the rotating drum and the rotating shaft in the rotating state can be obtained, and thus the viscosity of the liquid being measured can be obtained.

[0006] In some implementations, the rotating cylinder is a cylinder of uniform diameter; The rotating cylinder may include a cylindrical section of equal diameter and a truncated cone section of varying diameter. The cylindrical section is connected to the large-area port at the top of the truncated cone section, and the small-area cross-section of the truncated cone section is located at the bottom of the rotating cylinder.

[0007] In some embodiments, the bearing housing is a cylinder, and one end face of the cylinder is provided with a mounting hole with a single-sided opening, and the bearing is installed in the mounting hole of the bearing housing. The lower end of the shaft is installed in the inner hole of the bearing; The bearing housing has an upward-facing mounting hole that is installed in the positioning hole at the bottom of the rotating drum. The bearing is fixed in the mounting hole of the bearing housing by a first snap ring, and the bottom of the bearing housing is fixed to the rotating drum by fixing screws.

[0008] In some embodiments, the rotating drum includes a cylinder of equal diameter and a rotating drum cover connected to the upper end of the cylinder of equal diameter. The upper center of the rotating drum cover is provided with a threaded mounting hole, and the lower circumference is provided with an internal thread for connection and installation with a support ring. The outer diameter of the lower end of the rotating drum cover is equal to the outer diameter of the cylinder of equal diameter.

[0009] In some embodiments, the bearing housing is a cylinder, and one end face of the cylinder is provided with a mounting hole with a single-sided opening, and the bearing is installed in the mounting hole of the bearing housing. The bearing housing mounting hole faces downwards, and its outer circumference is provided with external threads for installation with the threaded mounting hole. The middle section of the shaft is installed in the inner hole of the bearing, and the middle section passes upward through the through shaft hole in the groove wall of the mounting hole of the bearing housing and downward through the lower opening of the mounting hole.

[0010] In some embodiments, a cylindrical boss is provided on the shaft to restrict the bearing from moving axially along the shaft, and a second snap ring is installed on the upper end of the shaft to fix the bearing seat.

[0011] In some implementations, the rotary cover is a cylinder of equal diameter or a truncated cone that is smaller at the top and larger at the bottom.

[0012] In some implementations, the upper end of the shaft is connected to the output shaft of an external drive motor via a bushing or coupling.

[0013] In some embodiments, the angle measuring component is a light-shielding strip; strip I is fixedly connected to the rotating shaft and rotates synchronously with the rotating shaft, and strip II is fixedly connected to the rotating cylinder and rotates synchronously with the rotating cylinder; a photoelectric sensor is installed on the cavity wall of the cavity containing the liquid to be measured to measure the time difference between the pulse signals generated by strip I and strip II; Alternatively, the angle measuring component can be any one of photoelectric encoders, magnetic encoders, and rotary transformers used to measure angle changes.

[0014] In some embodiments, the rotating cylinder is a thin-walled metal shell; The torsional elastic element is a helical spring hairpin; The bearing is a ceramic bearing; Barrier I and Barrier II are long strips of different widths or heights, with their length direction perpendicular to the axis of rotation, and the included angle between them is not zero; the barrier is made of aluminum alloy sheet. The photoelectric sensor is either a slotted cutoff photoelectric sensor or a reflective photoelectric displacement sensor.

[0015] The advantages of this rotary online viscosity sensor differential rotor are as follows: First, the rotor has high viscosity measurement accuracy and precision, making it suitable for online viscosity measurement in production environments. Second, the rotor has bearings inside the drum to fix the relative position of the shaft and the drum, ensuring that the drum remains coaxial with the shaft in the measured liquid, reducing measurement errors. Simultaneously, the bearing structure ensures that the torsional elastic element does not undergo planar deformation, eliminating the problems of long reset times and slow response speeds. Third, the bearings and torsional elastic element are installed inside the rotor, making them less susceptible to corrosion from the volatile gases of the measured liquid, significantly extending the equipment's service life. Fourth, the rotor of this invention eliminates the need for counterweights, improving the accuracy and stroke range of online viscosity measurement, reducing debugging and maintenance time, and enhancing testing continuity and production efficiency. Attached Figure Description

[0016] Figure 1 This is a cross-sectional schematic diagram of a semi-enclosed cylindrical rotor structure with a bottom-mounted bearing according to Embodiment 1 of the present invention. Figure 2 This is a cross-sectional schematic diagram of a semi-enclosed gyroscope rotor structure with a bottom-mounted bearing according to Embodiment 2 of the present invention. Figure 3 This is a cross-sectional schematic diagram of a fully enclosed cylindrical rotor with a top-mounted bearing according to Embodiment 3 of the present invention. Figure 4 This is a cross-sectional schematic diagram of the fully enclosed inverted gyroscope rotor structure with a top-mounted bearing according to Embodiment 4 of the present invention; Figure 5 for Figure 1 The diagram shows a top view of the rotor structure. Figure 6 for Figure 3 and Figure 4 A partially enlarged schematic diagram of section AA of the rotor structure shown; Figure 7 This is a schematic diagram of the output waveform of a single photoelectric sensor when the wide and narrow baffles rotate; Figure 8This is a schematic diagram of the output waveforms of the dual photoelectric sensors when the stop bar rotates; Rotating cylinder 1, cylindrical part 10, support ring 11, truncated cone part 12; positioning hole 13, fixing screw 14, equal diameter cylinder 16, rotating cylinder cover 17, threaded mounting hole 18; Bearing 2, bearing housing 21, first retaining ring 22; Rotating shaft 3, bushing 31, cylindrical boss 32, second snap ring 33, coupling 34, motor shaft 35; Torsional elastic element 4; Angle measuring component 5, stop bar I 51, stop bar II 52, photoelectric sensor 53; Detailed Implementation

[0017] The invention will now be described in further detail with reference to the accompanying drawings. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0018] Figures 1 to 6 A rotary online viscosity sensor differential rotor according to the present invention is schematically shown. As shown, the rotary online viscosity sensor differential rotor includes: a rotating cylinder 1, a bearing 2, a rotating shaft 3, a torsional elastic element 4, and an angle measuring component 5; The rotating cylinder 1 is a hollow, thin-walled rotating shell structure, preferably a thin-walled metal shell. The bottom of the rotating cylinder 1 is closed, the top is open, and a support ring 11 is provided at the top. The inner side of the rotating cylinder 1 is connected to the outer side of the torsional elastic element 4 through the support ring 11; the torsional elastic element 4 is preferably a helical spring.

[0019] The bearing 2 is mounted on the bottom or top of the inner side of the rotating cylinder 1 via the bearing housing 21; the bearing 2 is preferably a ceramic bearing. Further, the bearing housing 21 is a cylinder, and one end face of the cylinder is provided with a single-sided open mounting hole, in which the bearing 2 is mounted.

[0020] The rotating shaft 3 is installed in the inner hole of the bearing 2 and is coaxial with the rotating shaft of the rotating drum 1. The rotating shaft 3 is connected to the inner side of the torsion elastic element 4 through the bushing 31. Furthermore, the bushing 31 is fixed to the rotating shaft 3 by fastening screws.

[0021] The outer peripheral wall of the rotating drum 1 is in contact with the liquid being tested, while the torsional elastic element 4 and the bearing 2 are both located inside the rotating drum 1 and are isolated from the liquid being tested.

[0022] Angle measuring components 5 are respectively installed on the rotating drum 1 and the rotating shaft 3. By using external light measuring devices, electrical measuring devices, or magnetic measuring devices, the angular change or phase difference between the rotating drum 1 and the rotating shaft 3 in the rotating state can be obtained, thereby obtaining the viscosity of the liquid being measured. In a preferred embodiment of the angle measuring component 5, the angle measuring component 5 is a light-shielding strip; the strip I 51 is fixedly connected to the rotating shaft 3 and rotates synchronously with the rotating shaft 3, and the strip II 52 is fixedly connected to the rotating drum 1 and rotates synchronously with the rotating drum 1; the photoelectric sensor 53 is installed on the cavity wall of the cavity containing the liquid being measured to measure the time difference between the pulse signals generated by the strips I 51 and II 52. More preferably, the strips I 51 and II 52 are long strips with different widths or heights, and their length direction is perpendicular to the rotating shaft 3, with the included angle between them not being zero. The strips can be aluminum alloy strips, and the photoelectric sensor 53 can be a slotted cutoff photoelectric sensor or a reflective photoelectric displacement sensor. In another preferred embodiment of the angle measuring component 5, the angle measuring component 5 is any one of a photoelectric encoder, a magnetic encoder, and a rotary transformer that measures angle changes.

[0023] In application, the rotor of this invention has its shaft 3 connected to the output shaft 35 of an external motor. Furthermore, the upper end of the shaft 3 is connected to the output shaft 35 of an external drive motor via a bushing 31 or a coupling 34. The rotor is mounted downwards into a container, and the height of the liquid being measured in the container is kept constant. A microprocessor controls the motor to rotate at a certain speed and measures the phase difference between the rotating drum 1 and the shaft 3 to obtain the viscosity of the liquid being measured. The rotor of this invention can be used to construct offline viscometers for laboratory use, as well as for online viscosity measurement.

[0024] Further optimization of the differential rotor of the above-mentioned rotary online viscosity sensor results in preferred embodiments one to five.

[0025] like Figure 1 , Figure 5 In the semi-enclosed cylindrical rotor structure of Embodiment 1 shown, the rotating cylinder 1 is preferably configured as a cylinder 16 of equal diameter.

[0026] The mounting hole of the bearing housing 21 faces upward and is installed in the positioning hole 13 at the bottom of the equal diameter cylinder 16 of the rotating drum 1. The bearing 2 is fixed in the mounting hole of the bearing housing 21 by the first snap ring 22. The bottom of the bearing housing 21 is fixed to the equal diameter cylinder 16 of the rotating drum 1 by the fixing screw 14. The lower end of the rotating shaft 3 is installed in the inner hole of the bearing 2. Preferably, the upper end of the rotating shaft 3 is connected to the output rotating shaft 35 of the external drive motor through the bushing 31; the bushing 31 is provided with fastening screw holes to facilitate the installation of fastening screws.

[0027] Furthermore, baffle I51 is installed on bushing 31 perpendicular to the axis of rotating shaft 3 by screws, and baffle II52 is installed on the upper end face of support ring 11 perpendicular to the axis of rotating shaft 3. Baffle I51 and baffle II52 are at the same height and higher than the liquid surface of the liquid being measured, and the included angle between baffle I51 and baffle II52 is not zero. In this case, a slotted photoelectric sensor 53 can be used to measure the phase difference between rotating cylinder 1 and rotating shaft 3, and then the viscosity of the liquid being measured can be obtained through calibration and calculation.

[0028] Figure 7 The diagram illustrates the output waveform of a slotted photoelectric sensor 53 as the wide and narrow baffles rotate. When baffle I 51 rotates past photoelectric sensor 53, the sensor generates a narrow pulse with a rise time of T1. When baffle II 52 rotates past photoelectric sensor 53, the sensor generates a wide pulse with a rise time of T2. The sensor microprocessor determines the rise time of the narrow pulse by measuring the pulse width, using it as a reference for measuring the rotor phase difference. T2-T1 is calculated for each rotor revolution. T2-T1 is proportional to the phase difference between the rotor and the shaft 3, and therefore related to the liquid viscosity. By experimentally fitting the functional relationship between T2-T1 and viscosity, the viscosity of the liquid can be obtained by measuring T2-T1.

[0029] like Figure 2 The semi-enclosed gyroscope rotor structure of Embodiment 2 shown has a gyroscope-shaped cylinder 1, which includes a cylindrical part 10 of equal diameter and a truncated cone part 12 of variable diameter. The truncated cone part 12 is larger at the top and smaller at the bottom. The cylindrical part 10 is connected to the large-area port at the top of the truncated cone part 12, and the small-area cross-section of the truncated cone part 12 is located at the bottom of the cylinder 1.

[0030] The mounting hole of the bearing housing 21 faces upward and is installed in the positioning hole 13 at the bottom of the truncated cone portion 12 of the rotating drum 1. The bearing 2 is fixed in the mounting hole of the bearing housing 21 by the first snap ring 22. The bottom of the bearing housing 21 is fixed to the bottom of the truncated cone portion 12 of the rotating drum 1 by the fixing screw 14.

[0031] The lower end of the rotating shaft 3 is mounted in the inner hole of the bearing 2. Preferably, the upper end of the rotating shaft 3 is connected to the output shaft 35 of the external drive motor through the bushing 31.

[0032] The baffle I51 is installed on the bushing 31 perpendicular to the axis of the rotating shaft 3 by screws, and the baffle II52 is installed on the upper end face of the support ring 11 perpendicular to the axis of the rotating shaft 3. The baffles I51 and II52 are located at different axial heights and the included angle between them is not zero. In this case, the baffles I51 and II52 have the same width. The phase difference between the rotating drum 1 and the rotating shaft 3 can be measured by using two slotted photoelectric sensors 53 or one photoelectric displacement sensor. Then, the viscosity of the liquid being measured can be obtained through calibration and calculation. Figure 8The diagram shows the output waveform of the dual photoelectric sensors when the stop bar rotates.

[0033] Figure 8 The diagram shows the output waveforms of two slotted photoelectric sensors 53 as the stop bars rotate at different heights. When stop bar I 51 rotates past photoelectric sensor 53, photoelectric sensor I generates a pulse with a rise time of T1. When stop bar II 53 rotates past photoelectric sensor II, photoelectric sensor II generates a pulse with a rise time of T2. For each rotation of the rotor, the sensor microprocessor calculates T2-T1. T2-T1 is proportional to the phase difference between the rotor and the shaft 3, and therefore related to the liquid viscosity. By experimentally fitting the functional relationship between T2-T1 and viscosity, the viscosity of the liquid being measured can be obtained by measuring T2-T1.

[0034] Other reflective photoelectric sensors or laser displacement sensors can be used to measure the phase difference between the rotating drum 1 and the rotating shaft 3, but the photoelectric sensor 53 needs to be installed above the rotating drum 1.

[0035] The beneficial effects of Embodiment 1 and Embodiment 2 are: the bearing 2, located inside the rotating drum 1, is less susceptible to corrosion and damage; and because the bearing 2 is installed at the bottom of the rotating drum 1, the shaft 3 has stronger control over the rotor's axial deviation, meaning that the rotor is less prone to axial displacement when subjected to the thrust of the laterally flowing liquid. Embodiment 1 has a simple structure and significantly reduces costs; Embodiment 2 has a truncated cone section 12, which facilitates installation and cleaning.

[0036] like Figure 3 The fully enclosed cylindrical rotor structure of Embodiment 3 shown includes a rotating cylinder 1 comprising a cylinder 16 of equal diameter and a rotating cylinder cover 17 connecting to the upper end of the cylinder 16. The rotating cylinder cover 17 is a cylindrical structure of equal diameter. A threaded mounting hole 18 is provided at the center of the upper part of the rotating cylinder cover 17, and an internal thread is provided on its lower circumference to connect and install with a support ring 11. The outer diameter of the lower end of the rotating cylinder cover 17 is equal to the outer diameter of the cylinder 16. Figure 6 As shown, the outer circumference of the support ring 11 is threaded, the upper inner wall of the rotating cylinder 1 is threaded and sealed to the lower half of the support ring 11, and the lower inner wall of the rotating cylinder cover 17 is threaded and sealed to the upper half of the support ring 11. The support ring seals and connects the rotating cylinder 1 and the rotating cylinder cover 17 into one unit.

[0037] Preferably, the mounting hole of the bearing housing 21 faces downward, and its outer circumference is provided with external threads for mounting with threaded mounting holes 18; the bearing 2 is installed in the mounting hole of the bearing housing 21; this arrangement achieves a fully enclosed protective structure for the bearing 2.

[0038] The middle section of the rotating shaft 3 is installed in the inner hole of the bearing 2, and the middle section passes upward through the through shaft hole in the groove wall of the mounting hole of the bearing seat 21 and downward through the lower opening of the mounting hole. More preferably, a cylindrical boss 32 is provided on the rotating shaft 3 to restrict the bearing 2 from moving axially along the shaft, and a second snap ring 33 is installed on the upper end of the rotating shaft 3 to fix the bearing seat 21. Preferably, the upper end of the rotating shaft 3 is connected to the output shaft 35 of an external drive motor via a coupling 34.

[0039] Furthermore, stop bar I51 is installed on the rotating shaft 3 perpendicular to the axis of rotating shaft 2 by screws, and stop bar II52 is installed on the upper end face of bearing seat 21 perpendicular to the axis of rotating shaft 2. Stop bar I51 and stop bar II52 are at the same height, but the included angle between them is not zero.

[0040] like Figure 4 The fourth embodiment of the fully enclosed cylindrical rotor structure differs from the third embodiment only in that the rotor cover 17 is a truncated cone, smaller at the top and larger at the bottom. The bearing 2 is mounted on the top of the rotor cover 17 and is completely enclosed by the bearing seat 21. The stop bar I51 is mounted to the rotor shaft 3 perpendicular to the axis of the rotor shaft 2 by screws, and the stop bar II52 is mounted perpendicular to the axis of the rotor shaft 2 on the upper end face of the bearing seat 21. The stop bars I51 and II52 are located at different heights, and the included angle between them is not zero.

[0041] The beneficial effects of embodiments three and four are: when the height of the liquid being measured exceeds the top surface of the truncated cone, the accuracy of the measurement is less affected by the height of the liquid being measured; at the same time, due to the completely enclosed structure, the bearing is less susceptible to corrosion from the liquid being measured. Furthermore, by selecting a bearing 2 with an appropriate axial thickness, the influence of the lateral flow of the liquid being measured can be reduced, resulting in excellent control of the rotor's axial deviation by the rotating shaft 3.

[0042] Implementation Method 5: A rotary online viscosity sensor differential rotor with a double-end bearing limiting shaft. The difference between Implementation Method 5 and Implementation Methods 3 and 4 is that it includes two bearings 2 distributed vertically on the same axis and two bearing seats 21 that are fixedly connected to the two bearings 2 respectively. A bearing housing 21 and a mating bearing 2 are identical in structure to those in embodiments three and four, and are mounted on the rotating drum cover 17 at the upper end of the rotating drum 1. Another bearing housing 21 and the mating bearing 2 have the same structure as in embodiments one and two, and are installed on the equal diameter cylinder 16 or the truncated cone portion 12 at the lower end of the rotating cylinder 1. The upper bearing 2 is sleeved in the middle of the rotating shaft 3 and the lower bearing 2 is sleeved at the lower end; Its rotating cylinder 1 can be the same as in embodiments three and four, only including a cylinder 16 of equal diameter and a rotating cylinder cover 17 connecting the upper end of the cylinder 16 of equal diameter. It can also be compatible with the features of embodiment two, which includes a cylindrical part 10 of equal diameter, a truncated cone part 12 of varying diameter, and a rotating cylinder cover 17. The connection between the rotating cylinder cover 17 and the cylindrical part 10 is the same as in embodiments three and four, and the connection between the truncated cone part 12 and the cylindrical part 10 is the same as in embodiment two. This embodiment five combines all the advantages of embodiments one to four.

[0043] In summary, the beneficial effects of this rotary online viscosity sensor differential rotor are: Firstly, compared to the rotor of a traditional rotational viscometer, the rotor of this invention places the elastic element for measuring torque inside the rotating cylinder 1. The contact between the rotating cylinder 1 and the liquid being measured causes a phase difference change between the rotating cylinder 1 and the rotating shaft 3. Therefore, the rotational resistance caused by dynamically sealing the rotating shaft 1 does not affect the viscosity measurement results. This is because the differential measurement method measures the phase difference between the rotor and the rotating shaft 3. The force on the rotating shaft 3 does not affect the force on the rotor relative to the rotating shaft. Therefore, sealing the rotating shaft 3 has no impact on the accuracy and precision of the viscosity measurement, making it suitable for application in online viscosity measurement environments in production settings. Secondly, compared with the suspended rotor, firstly, the rotor cylinder 1 of the present invention is not only connected to the rotating shaft through a torsional elastic element, but also has a bearing 2 inside the cylinder 1 to fix the relative position of the rotating shaft 3 and the cylinder 1, so that the cylinder 1 always maintains a coaxial relationship with the rotating shaft 3 in the liquid being measured, reducing measurement errors; secondly, it solves the problem of equipment leveling errors in field application environments. The bearing structure of the present invention can ensure that the torsional elastic element does not undergo planar deformation, expanding the application range of the rotational viscosity sensor; thirdly, compared with the long reset time and slow response speed of the suspended rotor, the rotor structure of the present invention completely overcomes this deficiency. Thirdly, the bearing 2 and torsional elastic element of the rotor of this invention are installed inside the rotor, making them less susceptible to corrosion from the volatile gases of the tested liquid, thus greatly extending the service life of the equipment; Fourth, the rotor of this invention eliminates the counterweight and improves the accuracy and stroke range of online viscosity measurement, while reducing debugging and maintenance time and increasing testing continuity and production efficiency.

[0044] The above are merely some embodiments of the present invention. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of the present invention, and all such modifications and improvements fall within the scope of protection of the present invention.

Claims

1. A rotary online viscosity sensor differential rotor, characterized in that, include: Rotary drum (1), bearing (2), rotating shaft (3), torsional elastic element (4), and angle measuring component (5); The rotating cylinder (1) is a hollow thin-walled rotating shell structure. The bottom of the rotating cylinder (1) is closed and the top is open, and a support ring (11) is provided on the top. The inner side of the rotating cylinder (1) is connected to the outer side of the torsion elastic element (4) through the support ring (11). The bearing (2) is installed on the bottom or top of the inner side of the rotating drum (1) via a bearing seat (21); The rotating shaft (3) is installed in the inner hole of the bearing (2) and is coaxial with the rotating shaft of the rotating cylinder (1). The rotating shaft (3) is connected to the inner side of the torsion elastic element (4) through the bushing (31). The outer peripheral wall of the rotating drum (1) is in contact with the liquid being tested, and the torsional elastic element (4) and the bearing (2) are both located inside the rotating drum (1) and isolated from the liquid being tested; The angle measuring component (5) is installed on the rotating drum (1) and the rotating shaft (3) respectively. By using an external optical, electrical or magnetic measuring device, the angle change or phase difference between the rotating drum (1) and the rotating shaft (3) in the rotating state can be obtained, and thus the viscosity of the liquid being measured can be obtained.

2. The rotary online viscosity sensor differential rotor according to claim 1, characterized in that, The rotating cylinder (1) is a cylindrical cylinder (16) of equal diameter. Alternatively, the rotating cylinder (1) may include a cylindrical section (10) of equal diameter and a truncated cone section (12) of varying diameter. The cylindrical section (10) is connected to the large-area port on the upper part of the truncated cone section (12), and the small-area cross section of the truncated cone section (12) is located at the lower part of the rotating cylinder (1).

3. The rotary online viscosity sensor differential rotor according to claim 2, characterized in that, The bearing housing (21) is a cylinder, and one end face of the cylinder is provided with a mounting hole with a single-sided opening. The bearing (2) is installed in the mounting hole of the bearing housing (21). The lower end of the rotating shaft (3) is installed in the inner hole of the bearing (2); The mounting hole of the bearing seat (21) is open upward and is installed in the positioning hole (13) at the bottom of the rotating drum (1). The bearing (2) is fixed in the mounting hole of the bearing seat (21) by the first snap ring (22). The bottom of the bearing seat (21) is fixed to the rotating drum (1) by the fixing screw (14).

4. The rotary online viscosity sensor differential rotor according to claim 1, characterized in that, The rotating cylinder (1) includes a cylinder (16) of equal diameter and a rotating cylinder cover (17) connected to the upper port of the cylinder (16). The rotating cylinder cover (17) has a threaded mounting hole (18) at the center of its upper part and an internal thread on its lower circumference to connect and install with a support ring (11). The outer diameter of the lower port of the rotating cylinder cover (17) is equal to the outer diameter of the cylinder (16).

5. The rotary online viscosity sensor differential rotor according to claim 4, characterized in that, The bearing housing (21) is a cylinder, and one end face of the cylinder is provided with a mounting hole with a single-sided opening. The bearing (2) is installed in the mounting hole of the bearing housing (21). The bearing housing (21) has a downward-facing mounting hole, and its outer circumference is provided with an external thread for mounting to the threaded mounting hole (18). The middle section of the rotating shaft (3) is installed in the inner hole of the bearing (2), and the middle section passes upward through the through shaft hole of the upper groove wall of the mounting hole of the bearing seat (21) and downward through the lower opening of the mounting hole.

6. The rotary online viscosity sensor differential rotor according to claim 5, characterized in that, A cylindrical boss (32) is provided on the rotating shaft (3) to restrict the bearing (2) from moving along the axial direction of the rotating shaft. A second snap ring (33) is installed on the upper end of the rotating shaft (3) to fix the bearing seat (21).

7. The rotary online viscosity sensor differential rotor according to any one of claims 4 to 6, characterized in that, The rotating cover (17) is a cylinder of equal diameter or a truncated cone with a smaller top and a larger bottom.

8. The rotary online viscosity sensor differential rotor according to any one of claims 1 to 7, characterized in that, The upper end of the rotating shaft (3) is connected to the output shaft (35) of the external drive motor through a bushing (31) or a coupling (34).

9. The rotary online viscosity sensor differential rotor according to any one of claims 1 to 8, characterized in that, The angle measuring component (5) is a light-shielding strip. Strip I (51) is fixedly connected to the rotating shaft (3) and rotates synchronously with the rotating shaft (3). Strip II (52) is fixedly connected to the rotating cylinder (1) and rotates synchronously with the rotating cylinder (1). The photoelectric sensor (53) is installed on the cavity wall of the cavity containing the liquid to be measured to measure the time difference between the pulse signals generated by strip I (51) and strip II (51). Alternatively, the angle measuring component (5) may be any one of the following devices for measuring angle changes: photoelectric encoder, magnetic encoder, and rotary transformer.

10. The rotary online viscosity sensor differential rotor according to any one of claims 1 to 9, wherein the rotating drum (1) is a thin-walled metal shell; The torsional elastic element (4) is a spiral spring. The bearing (2) is a ceramic bearing; The baffles I (51) and II (52) are long strips with different widths or heights, and their lengths are perpendicular to the axis of rotation (3). The angle between them is not zero. The baffles are aluminum alloy strips. The photoelectric sensor (53) is a slotted cutoff photoelectric sensor or a reflective photoelectric displacement sensor.

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