Taylor-CouPoiseuille leaf flow rotation torque measuring device and measuring method

Abstract

The invention relates to the technical field of experimental device manufacturing, in particular to a Taylor-Coutepoiseuille leaf flow rotation torque measurement device and method, and the device comprises a stator mechanism, a rotor mechanism, a power transmission mechanism and a torque measurement mechanism, and the stator mechanism is internally provided with a measurement cavity; the rotor mechanism is arranged in the measuring chamber, a gap is formed between the rotor mechanism and the stator mechanism, and a Taylor-Coupoiule leaf flow can be formed in the gap through a cooling medium; the power input end of the power transmission mechanism is connected with the motor; the first end of the torque measuring mechanism is connected with the rotor mechanism and the second end is connected with the power transmission mechanism. The motor drives the power transmission mechanism to rotate, the power transmission mechanism drives the torque measurement mechanism to rotate, the torque measurement mechanism drives the rotor mechanism to rotate, and the torque measurement mechanism measures the rotation torque change of the rotor mechanism. According to the invention, the rotation torque of the Taylor-Coupoiseuille leaf flow can be accurately measured, and a reference basis is provided for the design and optimization of a motor cooling structure, the improvement of the power generation efficiency and the like.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of experimental device manufacturing, in particular to a Taylor-Couette flow rotating torque measuring device and measuring method, which can be applied to the measurement of electric vehicle motors. BACKGROUND

[0002] The motor is a power device in the field of new energy. Under the pursuit of smaller size and higher power, the motor speed has been rising from early 2-3 thousand revolutions to tens of thousands of revolutions. However, the motor loss increases geometrically with the speed, and the heat generated by the high motor loss causes the motor temperature to rise rapidly, which requires a good motor cooling method for cooling. The commonly used cooling method for high-speed motors is internal oil cooling.

[0003] However, the motor gap between the rotor and the stator of the motor cooled by the internal oil cooling method brings new challenges to the motor design. The flow loss caused by the cooling medium flowing through the motor rotor-stator gap will reduce the output power of the motor. In order to achieve the required motor output power, the loss caused by the flow of the cooling medium between the motor rotor-stator gap needs to be considered. The flow of the cooling medium in the gap between the high-speed rotating motor rotor and the stator is called Taylor-Couette flow. According to the rotor speed and the axial flow rate, Taylor-Couette flow can produce a rich flow state with large flow loss, which reduces the power output of the motor. It is necessary to qualitatively and quantitatively measure the rotating torque law of the medium passing through the motor rotor-stator gap. SUMMARY

[0004] The present disclosure is proposed in view of the above problems. The present disclosure provides a Taylor-Couette flow rotating torque measuring device and measuring method.

[0005] According to one aspect of the present disclosure, a Taylor-Couette flow rotating torque measuring device is provided, comprising:

[0006] a stator mechanism, an internal measurement chamber of the stator mechanism is provided;

[0007] a rotor mechanism, the rotor mechanism is arranged in the measurement chamber and can rotate relative to the stator mechanism, the rotor mechanism and the stator mechanism have a gap therebetween, and a Taylor-Couette flow can be formed by a cooling medium in the gap;

[0008] a power transmission mechanism, a power input end of the power transmission mechanism is connected to a motor;

[0009] a torque measuring mechanism, the torque measuring mechanism is arranged in the measurement chamber, a first end of the torque measuring mechanism is connected to the rotor mechanism, and a second end of the torque measuring mechanism is connected to the power transmission mechanism;

[0010] The motor drives the power transmission mechanism to rotate, the power transmission mechanism drives the torque measuring mechanism to rotate, the torque measuring mechanism drives the rotor mechanism to rotate, and the torque measuring mechanism measures the change in the rotational torque of the rotor mechanism to obtain the rotational torque generated by the Taylor-Couette Poiseuille flow in the gap.

[0011] In addition, the Taylor-Couette Poiseuille flow rotational torque measuring device according to one aspect of the present disclosure, the stator mechanism comprises:

[0012] The first outer cylinder, the rotor mechanism is arranged in the interior of the first outer cylinder;

[0013] The front end cover is arranged at the first end of the first outer cylinder, and the front end cover is provided with a liquid inlet pipe for inputting the cooling medium.

[0014] In addition, the Taylor-Couette Poiseuille flow rotational torque measuring device according to one aspect of the present disclosure, the stator mechanism further comprises:

[0015] The second outer cylinder is connected with the second end of the first outer cylinder, the cylinder wall of the second outer cylinder is provided with a liquid outlet pipe for outputting the cooling medium, and the torque measuring mechanism is arranged in the interior of the second outer cylinder.

[0016] In addition, the Taylor-Couette Poiseuille flow rotational torque measuring device according to one aspect of the present disclosure, the cylinder wall of the first outer cylinder is provided with a thermocouple screw for connecting a thermocouple.

[0017] In addition, the Taylor-Couette Poiseuille flow rotational torque measuring device according to one aspect of the present disclosure, the rotor mechanism comprises:

[0018] The second end of the first transmission shaft is connected with the torque measuring mechanism;

[0019] The inner cylinder is arranged on the first transmission shaft, the first transmission shaft can drive the inner cylinder to rotate, and the outer circumference of the inner cylinder and the inner circumference of the first outer cylinder have the gap.

[0020] In addition, the Taylor-Couette Poiseuille flow rotational torque measuring device according to one aspect of the present disclosure, different axial lengths of the inner cylinder can be replaced to change the axial length of the gap, and a shaft sleeve is arranged on the first transmission shaft, and the shaft sleeve is used for axially limiting the inner cylinder;

[0021] And / or, different radii of the inner cylinder can be replaced to change the width of the gap.

[0022] In addition, the Taylor-Couette Poiseuille flow rotational torque measuring device according to one aspect of the present disclosure, the interior of the first outer cylinder is provided with:

[0023] A first bearing seat is provided with a first bearing supporting a first end of the first transmission shaft, and the first bearing seat is provided with a through hole through which the cooling medium can flow.

[0024] A second bearing seat is provided with a second bearing supporting a second end of the first transmission shaft, and the second bearing seat is provided with a through hole through which the cooling medium can flow.

[0025] In addition, the Taylor Couette flow rotating torque measuring device according to one aspect of the present disclosure, the torque measuring mechanism comprises:

[0026] A torque sensor is used to measure the change of the rotating torque of the inner cylinder;

[0027] A first coupling connects the torque sensor and the second end of the first transmission shaft;

[0028] A second coupling connects the torque sensor and the power transmission mechanism;

[0029] The first coupling and the second coupling are flexible couplings.

[0030] In addition, the Taylor Couette flow rotating torque measuring device according to one aspect of the present disclosure, the power transmission mechanism comprises:

[0031] A magnetic torque transducer is used to connect the motor;

[0032] A second transmission shaft is connected to the second coupling at a first end and connected to the magnetic torque transducer at a second end, and the rotating torque is transmitted to the torque measuring mechanism.

[0033] In addition, the Taylor Couette flow rotating torque measuring device according to one aspect of the present disclosure, the inside of the second outer cylinder is provided with a third bearing seat, the third bearing seat is provided with a third bearing, the third bearing supports the first end of the second transmission shaft, and the third bearing seat is a closed plate structure.

[0034] In addition, the Taylor Couette flow rotating torque measuring device according to one aspect of the present disclosure, the stator mechanism further comprises:

[0035] A third outer cylinder is connected to the second end of the second outer cylinder at a first end, the magnetic torque transducer is arranged at a second end of the third outer cylinder, the inside of the third outer cylinder is provided with a fourth bearing seat, the fourth bearing seat is provided with a fourth bearing, and the fourth bearing supports the second end of the second transmission shaft.

[0036] Further, the Taylor-Couette flow rotating torque measuring device according to one aspect of the present disclosure, the magnetic torque transducer comprises:

[0037] An outer rotor for connecting the motor, an inner circumference of the outer rotor is provided with a first magnetic device;

[0038] An inner rotor connected to the second end of the second transmission shaft, an outer circumference of the inner rotor is provided with a second magnetic device, the inner rotor extends into the interior of the outer rotor, and the outer rotor drives the inner rotor to rotate through magnetic force;

[0039] An isolation cover arranged between the outer rotor and the inner rotor, connected and closed the second end of the third outer cylinder.

[0040] Further, the Taylor-Couette flow rotating torque measuring device according to one aspect of the present disclosure, the stator mechanism further comprises:

[0041] A pressing ring for fixing the isolation cover to the second end of the third outer cylinder to prevent leakage of the cooling medium.

[0042] According to another aspect of the present disclosure, a Taylor-Couette flow rotating torque measuring method is provided, comprising the following steps:

[0043] S1: the motor drives the magnetic torque transducer to rotate, and the magnetic torque transducer transmits the rotating torque of the motor to the rotor mechanism;

[0044] S2: when the rotor mechanism rotates at a low speed, the cooling medium flows into from the liquid inlet pipe of the front cover, passes through the gap between the inner cylinder and the first outer cylinder, and then flows out through the liquid outlet pipe of the second outer cylinder, and the Taylor-Couette flow is formed in the gap;

[0045] S3: when the rotor mechanism rotates at a low speed, the flow of the cooling medium in the gap is laminar flow, and the reading M of the torque sensor is recorded, which is the rotating torque of the inner cylinder under this flow state;

[0046] S4: by changing the rotating speed of the motor, the readings M of the torque sensor corresponding to different rotating speeds are measured, so as to obtain the rotating torque of the inner cylinder under different rotating speeds;

[0047] S5: by changing the flow rate of the cooling medium through the liquid inlet pipe, the readings M of the torque sensor corresponding to different axial flow rates are measured, so as to obtain the rotating torque of the inner cylinder under different axial flow rates;

[0048] S6: by changing the axial length of the inner cylinder, the readings M of the torque sensor corresponding to different axial lengths are measured, so as to obtain the rotating torque of the inner cylinder under different axial lengths.

[0049] Further, the Taylor-Couette flow rotating torque measurement method according to an aspect of the present disclosure further comprises the following steps:

[0050] S7: replace the inner cylinder with a different radius, perform steps S3, S4 and S5 to obtain the rotating torque of the inner cylinder corresponding to different rotating speeds, axial flow rates and axial lengths at different radius ratios.

[0051] The Taylor-Couette flow rotating torque measurement device and method according to the embodiments of the present disclosure can study the rotating torque characteristics of Taylor-Couette flow at different rotating speeds, geometrical structures, inlet flow rates and axial lengths, carry out relevant theoretical analysis and experimental research, and study the above content to reduce the oil stirring loss between the stator and the rotor of the motor, and improve the motor driving efficiency and power generation efficiency, which has important engineering and scientific significance.

[0052] It is to be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further explanation of the subject technology claimed. BRIEF DESCRIPTION OF DRAWINGS

[0053] The above and other objects, features and advantages of the present disclosure will become more apparent from specific description of embodiments thereof by referring to the attached drawings. The attached drawings are provided to assist in the understanding of the present disclosure and are not intended to limit the present disclosure. In the drawings, like reference numerals refer to like parts throughout the various figures.

[0054] Figure 1 FIG. 1 is a right side view of a Taylor-Couette flow rotating torque measurement device according to an embodiment of the present disclosure;

[0055] Figure 2 FIG. 2 is a cross-sectional view along A-A of the Taylor-Couette flow rotating torque measurement device according to the embodiment of the present disclosure; Figure 1

[0056] Figure 3 FIG. 4 is a flowchart of a Taylor-Couette flow rotating torque measurement method according to an embodiment of the present disclosure.

[0057] BRIEF DESCRIPTION OF DRAWINGS

[0058] ​100: Taylor-Couette flow rotating torque measurement device, 1: front end cover, 2: liquid inlet pipe, 3: first outer cylinder, 31: first bearing seat, 32: first bearing, 33: second bearing seat, 34: second bearing, 4: first sealing ring, 5: first transmission shaft, 51: shaft sleeve, 6: inner cylinder, 7: key, 8: thermocouple screw, 9: second outer cylinder, 91: third bearing seat, 92: third bearing, 93: mounting seat, 10: second sealing ring, 11: torque sensor, 12: first coupling, 13: second coupling, 14: liquid outlet pipe, 15: second transmission shaft, 16: third outer cylinder, 161: fourth bearing seat, 162: fourth bearing, 17: third sealing ring, 18: compression ring, 19: magnetic torque transducer, 191: outer rotor, 192: inner rotor, 193: isolation cover, 20: gap. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical scheme and advantages of the present disclosure more obvious, the example embodiments according to the present disclosure will be described in detail below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all embodiments of the present disclosure, and it should be understood that the present disclosure is not limited by the example embodiments described here.

[0060] The Taylor-Couette flow rotating torque measurement device and the measurement method provided by the embodiments of the present disclosure can accurately measure the rotating torque of Taylor-Couette flow, and provide reference basis for motor cooling structure design, optimization, driving efficiency, power generation efficiency improvement, etc.

[0061] The rotating torque of Taylor-Couette flow is affected by many factors such as rotor rotation speed, gap geometric size, axial flow speed, axial length, etc. However, the current measurement research on rotating torque is mainly Taylor-Couette flow without superimposed axial flow, and the measurement technology involved does not well eliminate the effect of additional rotating torque, so that the more accurate Taylor-Couette flow rotating torque value cannot be obtained, and the measurement result accuracy is not enough. At present, there is no high-precision Taylor-Couette flow rotating torque measurement device in China, and the related measurement device cannot realize the function of changing the axial length of the device.

[0062] The implementation of the embodiments of the present disclosure will be described in detail below with reference to the drawings.

[0063] As shown in Figure 1 , Figure 2 The Taylor-Couette flow rotating torque measurement device 100 provided by the embodiments of the present disclosure includes a stator mechanism, a rotor mechanism, a power transmission mechanism and a torque measurement mechanism.

[0064] The stator mechanism is fixed and immovable, and a measurement chamber is arranged in the inside of the stator mechanism.

[0065] The rotor mechanism simulates a rotor of a motor and can be driven to rotate. The rotor mechanism is arranged in the measuring chamber and can rotate relative to the stator mechanism. A gap 20 is formed between the rotor mechanism and the stator mechanism, and a Taylor-Couette flow can be formed in the gap 20 by the cooling medium. The cooling medium can be cooling oil.

[0066] The power input end of the power transmission mechanism is connected to the motor, which is a driving motor. The power output end is connected to the torque measuring mechanism. During the measurement, the power transmission mechanism is in a rotating state.

[0067] The torque measuring mechanism is arranged in the measuring chamber. The first end of the torque measuring mechanism is connected to the rotor mechanism, and the second end is connected to the power transmission mechanism. During the measurement, the torque measuring mechanism is in a rotating state.

[0068] The motor drives the power transmission mechanism to rotate, the power transmission mechanism drives the torque measuring mechanism to rotate, the torque measuring mechanism drives the rotor mechanism to rotate, and the torque measuring mechanism measures the change in the rotational torque of the rotor mechanism. The rotational torque generated by the Taylor-Couette flow in the gap 20 can be obtained.

[0069] The principle of measuring the rotational torque generated by the Taylor-Couette flow is as follows: Before the cooling medium is input, the torque measuring mechanism measures the rotational torque of the rotor mechanism to obtain an initial value. After the cooling medium is input, the Taylor-Couette flow is affected. At this time, the torque measuring mechanism measures the rotational torque of the rotor mechanism to obtain a changed value. By comparing the initial value and the changed value, the rotational torque generated by the Taylor-Couette flow in the gap 20 can be obtained.

[0070] The Taylor-Couette flow rotational torque measuring device in the embodiment of the present disclosure can accurately measure the rotational torque of the Taylor-Couette flow, and provide a reference basis for motor cooling structure design, optimization, driving efficiency, power generation efficiency improvement, etc.

[0071] In some possible implementations, as shown in Figure 1 、 Figure 2 The stator mechanism includes a first outer cylinder 3 and a front end cover 1.

[0072] The first outer cylinder 3 simulates a shell of a motor. The rotor mechanism is arranged inside the first outer cylinder 3 and can rotate inside the first outer cylinder 3. Flanges are arranged at both axial ends of the first outer cylinder 3.

[0073] The front end cover 1 simulates an end cover of a motor. The front end cover 1 is arranged at the first end of the first outer cylinder 3. The front end cover 1 is provided with a liquid inlet pipe 2 for inputting the cooling medium. The edge of the front end cover 1 is provided with a flange, and the first outer cylinder 3 is fixedly connected to the flange through a bolt.

[0074] The liquid inlet pipe 2 is located in the middle of the front end cover 1, opposite to the axis of the rotor mechanism, and the input cooling medium can be dispersed from the middle to the periphery into the gap 20. The connection position of the liquid inlet pipe 2 with the front end cover 1 needs to be provided with a sealing structure to prevent leakage of the cooling medium.

[0075] The front end cover 1 is provided with a plug-in section on the side facing the first outer cylinder 3, the plug-in section extends into the inside of the first outer cylinder 3, and the outer circumference of the plug-in section is provided with a sealing groove, and a first sealing ring 4 is arranged in the sealing groove, which is used to seal the connection position of the front end cover 1 and the first outer cylinder 3, preventing leakage of the cooling medium.

[0076] Because of the connection of the plug-in section, the front end cover 1 can move outward from the first outer cylinder 3 by a proper distance, the moving range is 50-200mm, and the precise locking of the first bearing seat 31 is realized.

[0077] In some possible embodiments, as shown in Figure 2 The cylinder wall of the first outer cylinder 3 is provided with a thermocouple screw 8 for connecting a thermocouple, which can measure the temperature change of the first outer cylinder 3, simulate the temperature rise change in the motor working process, and further carry out experimental research on the heat transfer characteristics of Taylor-Kurti-Poiseuille flow.

[0078] In some possible embodiments, as shown in Figure 2 The rotor mechanism includes a first transmission shaft 5 and an inner cylinder 6.

[0079] The first transmission shaft 5 simulates the main shaft of the motor, and the second end of the first transmission shaft 5 is connected to a torque measurement mechanism.

[0080] The inner cylinder 6 simulates the structure of the rotor coil or permanent magnet of the motor, and is arranged on the first transmission shaft 5. The first transmission shaft 5 can drive the inner cylinder 6 to rotate, and the outer circumference of the inner cylinder 6 and the inner circumference of the first outer cylinder 3 have a gap 20.

[0081] The inner cylinder 6 and the first transmission shaft 5 can be connected through a key 7 to keep circumferential fixation. The axial direction can be fixed by means of a step on the first transmission shaft 5 and a shaft sleeve 51.

[0082] In some possible embodiments, as shown in Figure 2 Different axial lengths of the inner cylinder 6 can be replaced to change the axial length of the gap 20. The first transmission shaft 5 is provided with a shaft sleeve 51 for axially limiting the inner cylinder 6. When the inner cylinder 6 is replaced, the shaft sleeve 51 also needs to be replaced with different axial lengths to ensure the overall stiffness of the rotor mechanism. The standard length modules of the inner cylinder 6 are 50mm, 100mm and 150mm.

[0083] The inner cylinder 6 with different radius can be replaced to change the width of the gap 20. When the radius of the inner cylinder 6 is reduced, the width of the gap 20 is increased. When the radius of the inner cylinder 6 is increased, the width of the gap 20 is reduced.

[0084] By replacing the axial length and radius of the inner cylinder 6, the influence of the axial length and width on the rotation torque of the Taylor-Kurti flow can be studied, and the range of experimental parameters can be expanded.

[0085] In some possible implementations, as shown in Figure 2 The first outer cylinder 3 is internally provided with a first bearing seat 31 and a second bearing seat 33.

[0086] The first bearing seat 31 is provided with a first bearing 32 supporting the first end of the first transmission shaft 5. The first bearing seat 31 is provided with a through hole through which the cooling medium can flow. The first bearing seat 31 is not an integral structure with the first outer cylinder 3, can be connected in close fit with the first outer cylinder 3, and is axially limited by the front end cover 1, remains fixed in the first outer cylinder 3, and the first end of the first transmission shaft 5 is provided with a nut and a bearing sleeve for axially limiting the first bearing 32.

[0087] The second bearing seat 33 is provided with a second bearing 34 supporting the second end of the first transmission shaft 5. The second bearing seat 33 is provided with a through hole through which the cooling medium can flow. The second bearing seat 33 is an integral structure with the first outer cylinder 3, remains fixed in the first outer cylinder 3, and the second end of the first transmission shaft 5 is provided with a nut and a bearing sleeve for axially limiting the second bearing 34.

[0088] In some possible implementations, as shown in Figure 1 , Figure 2 The stator mechanism further includes a second outer cylinder 9.

[0089] The second outer cylinder 9 is provided with a flange at both axial ends, is connected with the second end of the first outer cylinder 3, and can be fixedly connected through the flange and bolts. The cylinder wall of the second outer cylinder 9 is provided with a liquid discharge pipe 14 for outputting the cooling medium. The torque measurement mechanism is arranged in the interior of the second outer cylinder 9.

[0090] The second outer cylinder 9 is provided with a plug-in section on the side facing the first outer cylinder 3. The plug-in section extends into the interior of the first outer cylinder 3. The outer circumference of the plug-in section is provided with a sealing groove. The sealing groove is provided with a second sealing ring 10 for sealing the connection position of the second outer cylinder 9 and the first outer cylinder 3 to prevent leakage of the cooling medium.

[0091] In some possible implementations, as shown in Figure 2 The torque measurement mechanism includes a torque sensor 11, a first coupling 12, and a second coupling 13.

[0092] The torque sensor 11 is used for measuring the rotational torque change of the inner cylinder 6; the cylinder wall of the second outer cylinder 9 is provided with a mounting seat 93, and a signal emitting and power supply structure can be correspondingly arranged on the mounting seat 93 to transmit the measurement signal to the outside; the mounting seat 93 is provided with a circular hole communicating with the inside of the second outer cylinder 9;

[0093] The first coupling 12 connects the torque sensor 11 and the second end of the first transmission shaft 5, and is used for transmitting the rotational torque between the two;

[0094] The second coupling 13 connects the torque sensor 11 and the power transmission mechanism, and is used for transmitting the rotational torque between the two.

[0095] The first coupling 12 and the second coupling 13 can adopt a flexible coupling, which is used for compensating the axial, radial and angular relative displacement of the two shafts, so as to avoid damaging the torque sensor 11.

[0096] The power transmission mechanism, the torque measurement mechanism and the rotor mechanism form a series type torque transmission chain; the torque sensor 11 measures the overall torque value in real time; the data is led out through the circular hole of the rear mounting seat 93 and transmitted to the external data acquisition system; and the measurement accuracy reaches ±0.2% FS.

[0097] In some possible implementation manners, as shown in Figure 2 The power transmission mechanism includes a magnetic torque transducer 19 and a second transmission shaft 15.

[0098] The magnetic torque transducer 19 transmits the rotational torque through magnetic force, and there is no hard connection inside, so that the non-contact torque transmission is realized; and the magnetic torque transducer 19 is used for connecting the motor.

[0099] The first end of the second transmission shaft 15 is connected with the second coupling 13, and the second end is connected with the magnetic torque transducer 19, so as to transmit the rotational torque to the torque measurement mechanism.

[0100] In some possible implementation manners, as shown in Figure 2 The inside of the second outer cylinder 9 is provided with a third bearing seat 91, and the third bearing seat 91 is provided with a third bearing 92; the third bearing 92 supports the first end of the second transmission shaft 15; and the third bearing seat 91 is a closed plate structure, which can prevent the cooling medium from penetrating through the third bearing seat 91.

[0101] The third bearing seat 91 and the second outer cylinder 9 are an integral structure, and remain fixed in the second outer cylinder 9; the first end of the second transmission shaft 15 is provided with a nut and a bearing sleeve to axially limit the third bearing 92.

[0102] In some possible implementation manners, as shown in Figure 2 The stator mechanism further includes a third outer cylinder 16.

[0103] The third outer cylinder 16 is provided with flanges at both axial ends, the first end of the third outer cylinder 16 is connected with the second end of the second outer cylinder 9, and the connection can be fixed by the flanges and bolts. The magnetic transmission torque sensor 19 is arranged at the second end of the third outer cylinder 16. The third outer cylinder 16 is internally provided with a fourth bearing seat 161, and the fourth bearing seat 161 is provided with a fourth bearing 162. The fourth bearing 162 supports the second end of the second transmission shaft 15.

[0104] The fourth bearing seat 161 is not an integral structure of the third outer cylinder 16, but can be tightly connected with the third outer cylinder 16, and is axially limited by the step of the inner circumference of the third outer cylinder 16, so as to be fixed in the third outer cylinder 16. The second end of the second transmission shaft 15 is provided with a bearing sleeve to axially limit the fourth bearing 162.

[0105] The side of the third outer cylinder 16 facing the second outer cylinder 9 is provided with a plug-in section, which extends into the interior of the second outer cylinder 9. The outer circumference of the plug-in section is provided with a sealing groove, and the sealing groove is provided with a third sealing ring 17, which is used to seal the connection position of the third outer cylinder 16 and the second outer cylinder 9, so as to prevent the cooling medium from leaking.

[0106] In some possible embodiments, as shown in Figure 2 The magnetic transmission torque sensor 19 includes an outer rotor 191, an inner rotor 192, and an isolation cover 193.

[0107] The outer rotor 191 is used to connect the motor, and the inner circumference of the outer rotor 191 is provided with a first magnetic device.

[0108] The inner rotor 192 is connected with the second end of the second transmission shaft 15, and the outer circumference of the inner rotor 192 is provided with a second magnetic device. The inner rotor 192 extends into the interior of the outer rotor 191, and the outer rotor 191 drives the inner rotor 192 to rotate by magnetic force, so as to realize non-contact torque transmission.

[0109] The isolation cover 193 can be made of fluororubber material, which can resist fluid pressure of 1.5 MPa. The isolation cover 193 is arranged between the outer rotor 191 and the inner rotor 192, and connects and seals the second end of the third outer cylinder 16.

[0110] The isolation cover 193 forms a closed cavity at the second end of the third outer cylinder 16, converts dynamic sealing into static sealing, and completely avoids leakage of the cooling medium.

[0111] In some possible embodiments, as shown in Figure 2 The stator mechanism further includes a pressing ring 18.

[0112] The pressing ring 18 is fixedly connected with the second end of the third outer cylinder 16 through bolts, and the isolation cover 193 is fixed to the second end of the third outer cylinder 16, so that the leakage of the cooling medium is prevented. A sealing groove and a sealing ring can also be arranged at the second end of the third outer cylinder 16, so that the sealing performance of the connection position is further improved.

[0113] In some possible embodiments, as shown in Figure 3 The Taylor-Couette flow rotating torque measurement method includes the following steps:

[0114] S1: The motor drives the magnetic transmission torque meter to rotate, and the magnetic transmission torque meter transmits the rotating torque of the motor to the rotor mechanism;

[0115] S2: When the rotor mechanism rotates at a low speed, the cooling medium flows into the inner cylinder from the liquid inlet pipe of the front end cover, passes through the gap between the inner cylinder and the first outer cylinder, and then flows out through the liquid outlet pipe of the second outer cylinder, so that the Taylor-Couette flow is formed in the gap;

[0116] S3: When the rotor mechanism rotates at a low speed, the flow of the cooling medium in the gap is laminar flow, and the reading M of the torque sensor is recorded, that is, the rotating torque of the inner cylinder under the flow state is recorded;

[0117] S4: By changing the rotating speed of the motor, the readings M of the torque sensor corresponding to different rotating speeds are measured, so that the rotating torque of the inner cylinder under different rotating speeds is obtained;

[0118] S5: By changing the flow rate of the cooling medium through the liquid inlet pipe, the readings M of the torque sensor corresponding to different axial flow rates are measured, so that the rotating torque of the inner cylinder under different axial flow rates is obtained;

[0119] S6: By changing the axial length of the inner cylinder, the readings M of the torque sensor corresponding to different axial lengths are measured, so that the rotating torque of the inner cylinder under different axial lengths is obtained.

[0120] In some possible embodiments, as shown in Figure 3 The Taylor-Couette flow rotating torque measurement method further includes the following steps:

[0121] S7: The inner cylinder with different radii is replaced, and steps S3, S4 and S5 are performed, so that the rotating torque of the inner cylinder corresponding to different rotating speeds, axial flow rates and axial lengths under different radius ratios is obtained.

[0122] The Taylor-Couette flow rotating torque measurement method in the embodiments of the present disclosure can accurately measure the rotating torque of the Taylor-Couette flow, and provide a reference basis for motor cooling structure design, optimization, driving efficiency, power generation efficiency improvement and the like.

[0123] The Taylor-Couette flow rotating torque measuring device and the measuring method according to the embodiments of the present disclosure are described above with reference to the drawings, and have the following advantages.

[0124] The rotating torque characteristics of the Taylor-Couette flow under different rotating speeds, geometric structures, inlet flow rates, and axial lengths can be studied, and relevant theoretical analysis and experimental research can be carried out. The above content has important engineering and scientific significance for reducing the oil stirring loss between the stator and the rotor of the motor, and improving the motor driving efficiency and the power generation efficiency.

[0125] The basic principles of the present disclosure are described above in combination with specific embodiments, but it should be pointed out that the advantages, advantages, effects and the like mentioned in the present disclosure are only examples and are not limiting, and these advantages, advantages, effects and the like cannot be considered as the must-have of each embodiment of the present disclosure. In addition, the specific details of the above disclosure are only for the purpose of example and for the purpose of understanding, and the above details do not limit the present disclosure to the must-use specific details.

[0126] The block diagrams of the devices, apparatuses, equipment, systems involved in the present disclosure are only illustrative examples and are not intended to require or imply that the connection, arrangement, configuration shown in the block diagram must be connected, arranged, configured. As those skilled in the art will recognize, these devices, apparatuses, equipment, systems can be connected, arranged, configured in any manner. Words such as "include", "contain", "have" and the like are open-ended words, which mean "including but not limited to", and can be used interchangeably. The words "or" and "and" used herein mean the word "and / or", and can be used interchangeably unless the context clearly indicates otherwise. The word "such as" used herein means the phrase "such as but not limited to", and can be used interchangeably.

[0127] In addition, as used herein, "or" used in the list of items starting with "at least one" indicates separate listing, so that for example, the list of "at least one of A, B or C" means A or B or C, or AB or AC or BC, or ABC (i.e. A and B and C). In addition, the phrase "exemplary" does not mean that the described example is preferred or better than other examples.

[0128] It should also be noted that in the systems and methods of the present disclosure, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be considered as equivalent solutions of the present disclosure.

[0129] Various changes, modifications, and alterations to the techniques described herein can be made without departing from the teachings of the attached claims. Moreover, the scope of the claims of the present disclosure is not limited to the particular aspects described herein. Rather, the scope of the claims of the present disclosure includes all alternatives, modifications, and equivalents falling within the scope of the claims of the present disclosure. Accordingly, the attached claims are incorporated into this Detailed Description by reference.

[0130] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other aspects without departing from the scope of the disclosure. Thus, the present disclosure is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0131] The above description has been presented for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present disclosure to the forms disclosed herein. Although various example aspects and embodiments have been discussed above, those of ordinary skill in the art will appreciate a variety of modifications, alternatives, permutations, and equivalents thereof. Accordingly, the disclosure is intended to embrace all such alterations, modifications, and permutations of the aspects described herein, including other aspects falling within the scope of the appended claims.

Claims

1. A Taylor-Couterberg blade flow rotation torque measuring device, characterized in that, include: A stator mechanism, wherein a measuring chamber is provided inside the stator mechanism; A rotor mechanism is disposed in the measuring chamber and is rotatable relative to the stator mechanism. There is a gap (20) between the rotor mechanism and the stator mechanism, and a Taylor-Couterberg flow can be formed in the gap (20) by a cooling medium. A power transmission mechanism, wherein the power input end of the power transmission mechanism is connected to a motor; A torque measuring mechanism is provided in the measuring chamber, with its first end connected to the rotor mechanism and its second end connected to the power transmission mechanism. The motor drives the power transmission mechanism to rotate, the power transmission mechanism drives the torque measuring mechanism to rotate, the torque measuring mechanism drives the rotor mechanism to rotate, and the torque measuring mechanism measures the change in the rotational torque of the rotor mechanism, thereby obtaining the rotational torque generated by the Taylor Cotperz flow in the gap (20).

2. The Taylor-Couterberg blade flow rotation torque measuring device according to claim 1, characterized in that, The stator mechanism includes: The first outer cylinder (3) has the rotor mechanism disposed inside the first outer cylinder (3); Front cover (1), the front cover (1) is disposed at the first end of the first outer cylinder (3), the front cover (1) is provided with a liquid inlet pipe (2) for inputting cooling medium; The second outer cylinder (9) is connected to the second end of the first outer cylinder (3). The cylinder wall of the second outer cylinder (9) is provided with a drain pipe (14) for outputting cooling medium. The torque measuring mechanism is located inside the second outer cylinder (9).

3. The Taylor-Couterberg blade flow rotation torque measuring device according to claim 2, characterized in that, The rotor mechanism includes: The first drive shaft (5) has its second end connected to the torque measuring mechanism; Inner cylinder (6), the inner cylinder (6) is disposed on the first drive shaft (5), the first drive shaft (5) can drive the inner cylinder (6) to rotate, and there is a gap (20) between the outer circumference of the inner cylinder (6) and the inner circumference of the first outer cylinder (3); The inner cylinder (6) with different axial lengths can be replaced to change the axial length of the gap (20). A bushing (51) is provided on the first drive shaft (5) for axially limiting the inner cylinder (6); and / or, the inner cylinder (6) with different radii can be replaced to change the width of the gap (20).

4. The Taylor-Couterberg blade flow rotation torque measuring device according to claim 3, characterized in that, The interior of the first outer cylinder (3) is provided with: A first bearing housing (31) is provided with a first bearing (32), the first bearing (32) supports the first end of the first transmission shaft (5), and the first bearing housing (31) is provided with a through hole through which a cooling medium can flow. The second bearing housing (33) is provided with a second bearing (34), which supports the second end of the first transmission shaft (5). The second bearing housing (33) is provided with a through hole through which a cooling medium can flow.

5. The Taylor-Couterberg blade flow rotation torque measuring device according to claim 3, characterized in that, The torque measuring mechanism includes: A torque sensor (11) is used to measure the rotational torque change of the inner cylinder (6); A first coupling (12) is connected to the torque sensor (11) and the second end of the first drive shaft (5); The second coupling (13) connects the torque sensor (11) and the power transmission mechanism; The first coupling (12) and the second coupling (13) are flexible couplings.

6. The Taylor-Couterberg blade flow rotation torque measuring device according to claim 5, characterized in that, The power transmission mechanism includes: A magnetic torque transmitter (19) is used to connect to a motor; The second drive shaft (15) has its first end connected to the second coupling (13) and its second end connected to the magnetic torque transmitter (19), which transmits the rotational torque to the torque measuring mechanism.

7. The Taylor-Couterberg blade flow rotation torque measuring device according to claim 6, characterized in that, The second outer cylinder (9) is provided with a third bearing seat (91), and a third bearing (92) is provided in the third bearing seat (91). The third bearing (92) supports the first end of the second transmission shaft (15). The third bearing seat (91) is a closed plate structure.

8. The Taylor-Couterberg blade flow rotation torque measuring device according to claim 6, characterized in that, The stator mechanism also includes: The third outer cylinder (16) has its first end connected to the second end of the second outer cylinder (9). The magnetic torque transmitter (19) is located at the second end of the third outer cylinder (16). The third outer cylinder (16) has a fourth bearing seat (161) inside it. The fourth bearing seat (161) has a fourth bearing (162) inside it. The fourth bearing (162) supports the second end of the second transmission shaft (15).

9. A method for measuring the rotational torque of a Taylor-Couterberg blade flow, characterized in that, Includes the following steps: S1: The motor drives the magnetic torque transmitter to rotate, and the magnetic torque transmitter transmits the rotational torque of the motor to the rotor mechanism. S2: When the rotor mechanism rotates at low speed, the cooling medium flows in from the inlet pipe of the front cover, passes through the gap between the inner cylinder and the first outer cylinder, and then flows out through the drain pipe of the second outer cylinder, forming a Taylor-Couterberg flow in the gap. S3: When the rotor mechanism rotates at a low speed, the cooling medium flows in the gap in a laminar flow. The reading M of the torque sensor is recorded, which is the rotational torque of the inner cylinder under this flow state. S4: By changing the speed of the motor, the reading M of the torque sensor corresponding to different speeds is measured, thereby obtaining the rotational torque of the inner cylinder at different speeds; S5: By changing the flow rate of the cooling medium through the inlet pipe, the reading M of the torque sensor corresponding to different axial flow rates is measured to obtain the rotational torque of the inner cylinder under different axial flow rates. S6: By changing the axial length of the inner cylinder, the reading M of the torque sensor corresponding to different axial lengths is measured to obtain the rotational torque of the inner cylinder under different axial lengths.

10. The method for measuring the rotating torque of a Taylor-Couterberg blade flow according to claim 9, characterized in that, It also includes the following steps: S7: Replace the inner cylinder with a different radius, and execute steps S3, S4 and S5 to obtain the rotational torque of the inner cylinder corresponding to different rotational speeds, axial flow rates and axial lengths under different radius ratios.

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