Limited angle motor testing mechanism and method

Abstract

The invention relates to a limited angle motor testing mechanism and method, the limited angle motor testing mechanism is constructed through a limited angle motor testing mechanism, a gas source / hydraulic source, a pressure reducing device, an electromagnetic valve, a flow meter, a pressure meter and an operation center, and the limited angle motor testing mechanism is mainly used for controlling a limited angle motor of a fluid valve. The flow / pressure / temperature and other parameters of fluid in a flow path can be accurately adjusted through the mechanism, accurate load control of the limited angle motor is achieved, and the actual flow field condition in the working environment is simulated through the limited angle motor testing mechanism composed of a structure main body part, a core rotating part and a flow field outlet and inlet adjusting part. Accurate testing of the limited angle motor for controlling on-off of a gas path or a liquid path is achieved, meanwhile, a core rotating part and a flow field outlet and inlet adjusting part in the mechanism can be rapidly replaced, and testing work of the limited angle motor under flow fields of different sizes is completed.

Description

Technical Field

[0001] The present invention relates to a limited-angle motor testing mechanism and method, and in particular to a limited-angle motor testing system under a fluid valve working environment, belonging to the field of motor performance testing. Background Art

[0002] The limited angle motor has fast response speed and precise stop position. It is used to drive various switch valves that control the on and off of gas or liquid circuits. It is an important servo power control actuator.

[0003] In the process of controlling the opening and closing of the gas or liquid circuit, the output torque of the limited angle motor is not constant due to the influence of the complex flow field, and the positions of different rotation angles are very different, which has a great impact on its response time. The existing test devices are difficult to meet the requirements of accurate and rapid testing of the working characteristics of the limited angle motor under different flow field conditions.

[0004] For example, Chinese patent CN116973744A is named as a test system and method for the swing angle of a limited-angle motor, which consists of a test stand and a position encoder. The motor is driven to swing through a control system to test the swing angle and current information. The test system cannot apply a load to the limited angle and cannot obtain the angle characteristics under load.

[0005] Chinese patent CN215894859 is named as a current-torque characteristic test device for a limited-angle torque motor. The pulley drives the weights on the rope to simulate torques of different sizes. This method cannot simulate the influence of the change of load torque on the limited-angle motor in the complex flow field during the switching process.

[0006] The Chinese patent CN112393833A is named as a measuring device and method for measuring the unbalanced magnetic pull of a limited angle motor. It mainly focuses on the problem of internal magnetic pull of the motor and cannot measure the influence of external load. The above patent is not suitable for flow field environments with complex and changeable loads. Summary of the invention

[0007] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art and to provide a limited angle motor testing mechanism and method, which can realize the testing of the limited angle for controlling the fluid valve, thereby achieving the purpose of improving the test coverage and improving the test accuracy.

[0008] The technical solution of the present invention is:

[0009] A limited-angle motor testing mechanism comprises: a core rotating part, a structural main body part, and a flow field outlet and inlet regulating part;

[0010] The core rotating part includes a valve core, a wave spring, a first bearing and a second bearing;

[0011] The main structure includes a transfer flange, a housing, a valve core sleeve, a bearing adjustment ring, a bottom cover and a guide key;

[0012] The flow field outlet and inlet regulating parts include: a joint, a diameter regulating nozzle and a sealing gasket;

[0013] The shell is a nearly cubic structure, with a through hole as the center hole opened along the vertical center axis, and a horizontal through hole is also opened on the side wall of the cubic structure, which is connected to the center hole; the valve core sleeve is directionally installed in the middle position of the center hole of the shell, and the position is fixed by a guide key; the valve core is installed inside the valve core sleeve, and the second bearing is placed in the bearing adjustment ring, which is arranged at the lower part of the center hole through the bearing adjustment ring, and the bearing adjustment ring is fixed in the position by the bottom cover to ensure sealing; the lower end of the valve core is connected with the second bearing; the upper end of the valve core is connected with the first bearing, and the first bearing is installed in the valve core sleeve; a wave spring is arranged between the first bearing and the valve core sleeve; the limited angle motor to be measured is installed above the shell through an adapter flange, and the motor extends out of the shaft to connect the valve core;

[0014] The horizontal through hole on the side wall of the shell is a circular hole in the radial direction of the central hole where the core rotating part is located. A diameter-adjusting nozzle is installed inside the circular hole, a joint is installed outside the circular hole, and a sealing gasket is padded between the joint and the shell.

[0015] Furthermore, the installation height of the second bearing in the housing is adjusted by changing the size of the bearing adjustment ring.

[0016] Furthermore, the wave spring is installed between the first bearing and the valve core sleeve, and the axial clearance is eliminated by the preload force provided by the wave spring when it is compressed.

[0017] Furthermore, the core rotating part rotates in the test mechanism, and is affected by the resistance torque generated by the flow field. At the same time, the flat shaft at the upper end of the valve core is connected to the extended shaft of the limited angle motor to be tested, so that the resistance torque is applied to the limited angle motor to be tested.

[0018] Furthermore, when a joint does not need to be installed outside the circular hole, a plug is installed.

[0019] Further, the limited-angle motor test mechanism is equipped with three joints, namely an inlet joint, an outlet joint and an outlet joint;

[0020] During the test, the fluid source enters the test mechanism through the inlet joint, passes through the center hole of the valve core, flows to the outlet joint, and leaves the inside of the test mechanism. At this time, the limited angle motor to be tested is driven by the controller to rotate clockwise, so that the valve core starts to rotate under its drive. When it rotates 90° clockwise, the right-angle passage inside the valve core connects the fluid inlet joint with the fluid outlet joint on the left.

[0021] Furthermore, a position sensor is installed at the lower end of the valve core to accurately control the rotation of the valve core to different angles, thereby testing the working characteristics of the limited angle motor at different angles. At the same time, by adjusting the size and shape of the inner diameter of the diameter-adjusting nozzle, different flow field environments can be quickly simulated.

[0022] Furthermore, the response time of the limited-angle motor is determined based on the phase current waveform of the limited-angle motor. At time t0, the current is input and the limited-angle motor starts to work. s At the moment, the current at both ends of the limited angle motor becomes a stable value or zero, the limited angle motor rotates to the position and stops working. The time difference between these two positions is t Δ =t s -t0 is the response time.

[0023] In a second aspect, the present invention further proposes a limited-angle motor test system, comprising: an air source / hydraulic source, a pressure reducing device, a solenoid valve, a flow meter, a pressure gauge and an operation center; wherein the operation center comprises a host computer, a controller, a tester and a signal generator;

[0024] With the tested limited-angle motor and the limited-angle motor test mechanism as the center, the air source / hydraulic source enters the air inlet of the test mechanism through the pressure reducing device and the solenoid valve. The air inlet and exhaust ends are equipped with flow meters and pressure gauges, and temperature measuring points are set to achieve comprehensive monitoring of the inlet and outlet fluids; the operation center realizes the simulation, adjustment, control and monitoring of the test situation;

[0025] In the operation center, the signal generator is used to simulate the operating status characterization signal that the system feeds back to the controller in actual use conditions; the controller is used to receive the signal from the signal generator, and control the rotation of the limited angle motor according to the established program based on the signal; the tester is used to collect the flow, temperature, pressure and current and voltage data at both ends of the limited angle motor in the system; the host computer is used to receive and store data in the tester, set the frequency and waveform of the analog signal in the signal generator, and set the specific parameters of the program in the controller.

[0026] In a third aspect, the present invention further provides a limited angle motor testing method, comprising the following steps:

[0027] (1) Confirm the flow field size according to the actual product, adjust the valve core and the diameter size d and shape of the nozzle to meet the test requirements, install it into the limited angle motor test mechanism, and install the limited angle motor to be tested;

[0028] (2) Confirm the flow field inlet and outlet conditions, including pressure P, temperature T, flow F, and set the air source / hydraulic source parameters;

[0029] (3) Set the signal generator output value U sig The frequency and waveform are used to simulate the sensor return signal value under real working conditions;

[0030] (4) The controller starts working, turns on the signal generator signal output, turns on the air source / hydraulic source end solenoid valve, and the controller outputs the signal value U according to the preset threshold. sig After the judgment, the limited angle motor is driven to rotate and stop at different angle positions. The tester reads the phase voltage U and phase current I of the limited angle motor and the test data of each fluid, including the inlet pressure P i , Temperature T i , flow rate F and each outlet pressure P out1 , Temperature T out1 Flow F out1 ,…,P outn 、T outn 、F outn , and feedback to the host computer;

[0031] (5) After the test is completed, first determine whether the parameters of each outlet fluid meet the requirements. If not, it is necessary to modify the size d and shape of the diameter-adjusting nozzle and then conduct the above test. If the requirements are met, proceed to the next step (6);

[0032] (6) Determine the response time t based on the finite angle motor phase current I curve. If it is less than the maximum response time, it meets the requirements and is a qualified product. If it exceeds the response time requirements, it is a failed product.

[0033] The beneficial effects of the present invention compared with the prior art are:

[0034] (1) The present invention realizes accurate testing of limited-angle motors that control the on-off of gas or liquid circuits, avoiding the situation where the motor test does not match the actual working conditions or the load is difficult to simulate the actual working conditions;

[0035] (2) The mechanism of the present invention can change the diameter of the fluid passage according to the actual flow field environment. Compared with the prior art, it can achieve low-cost and high-efficiency simulation of different flow field environments;

[0036] (3) The present invention can test various inlet conditions in one test by changing the inlet pressure / temperature, and can complete the performance test of the limited angle motor under various working conditions at one time;

[0037] (4) The present invention simulates the entire process from signal input to the action of the limited-angle motor. Compared with the existing testing methods, the present invention fully tests the continuous response capability of the limited-angle motor under real working requirements, thus avoiding the problem that a single switch test can meet the requirements but cannot meet the actual working conditions of frequent and rapid response. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the structure of the test system of the present invention;

[0039] Figure 2 A schematic diagram of the three-dimensional appearance of the test system structure of the present invention;

[0040] Figure 3 It is a schematic diagram of the flow field pathway of the present invention;

[0041] Figure 4 It is the principle diagram of the test system diagram of the present invention;

[0042] Figure 5 This is the judgment basis diagram for the response time of the limited angle motor;

[0043] Figure 6 This is the system test flow chart. DETAILED DESCRIPTION

[0044] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0045] like Figure 1 As shown, the present invention proposes a limited-angle motor testing mechanism, comprising: a core rotating part, a structural main body part, and a flow field outlet and inlet regulating part;

[0046] The core rotating part includes a valve core 5, a wave spring 11, a first bearing 12 and a second bearing 15;

[0047] The main structure includes a transfer flange 2, a housing 3, a valve core sleeve 4, a bearing adjustment ring 8, a bottom cover 9 and a guide key 13;

[0048] The flow field outlet and inlet regulating part includes: a joint 6, a diameter regulating nozzle 7 and a sealing gasket 14;

[0049] like Figure 2 As shown, the housing 3 is a nearly cubic structure, with a through hole opened on the central axis in the vertical direction as the center hole, and a horizontal through hole is also opened on the side wall of the cubic structure, which is connected to the center hole; the valve core sleeve 4 is directionally installed in the middle position of the center hole of the housing 3, and the position is fixed by the guide key 13; the valve core 5 is installed inside the valve core sleeve 4, and the second bearing 15 is placed in the bearing adjustment ring 8, which is arranged at the lower part of the center hole through the bearing adjustment ring 8. The bearing adjustment ring 8 is fixed in the position by the bottom cover 9 and ensures sealing; the lower end of the valve core 5 is connected with the second bearing 15; the upper end of the valve core 5 is connected with the first bearing 12, and the first bearing 12 is installed in the valve core sleeve 4; a wave spring 11 is arranged between the first bearing 12 and the valve core sleeve 4; the axial clearance is eliminated by the preload force provided by the wave spring 11 when it is compressed. The limited angle motor 2 to be measured is installed above the housing 3 through the adapter flange 3, and the motor extends the shaft to connect the valve core 5;

[0050] The horizontal through hole on the side wall of the shell 3 is a circular hole in the radial direction of the central hole where the core rotating part is located. A diameter-adjusting nozzle 7 is installed inside the circular hole, and a joint 6 is installed outside the circular hole. A sealing gasket 14 is padded between the joint 6 and the shell 3. A four-channel structure is taken as an example in the figure, and different angles and channel numbers can also be tested.

[0051] The installation height of the second bearing 15 in the housing 3 is adjusted by changing the size of the bearing adjusting ring 8 .

[0052] The core rotating part rotates in the test mechanism, and is affected by the resistance torque generated by the flow field. At the same time, the flat shaft at the upper end of the valve core 5 is connected to the extended shaft of the limited angle motor 1 to be tested, and the resistance torque is applied to the limited angle motor 1 to be tested.

[0053] like Figure 2 As shown, a joint is generally installed outside the circular hole, and a plug 10 may also be installed as required.

[0054] like Figure 3 , which is a schematic diagram of the flow field passage in the embodiment of the present invention. In this embodiment, three joints 6 and one plug 10 are installed, and the three joints 6 are respectively: an inlet joint 6-1, a left outlet joint 6-2, and a right outlet joint 6-3.

[0055] During the test, the fluid source enters the test mechanism through the inlet connector 6-1, passes through the central through hole of the valve core 5, flows to the outlet connector 6-3, and leaves the test mechanism. At this time, the controller drives the limited angle motor 1 to rotate clockwise, so that the valve core 5 starts to rotate under its drive. When it rotates 90° clockwise, the right-angle passage inside the valve core 5 connects the fluid inlet connector 6-1 with the left fluid outlet connector 6-2. It can also rotate 90° counterclockwise, at which time the fluid inlet is completely blocked.

[0056] In addition, a position sensor such as a resolver or encoder can be installed at the lower end of the valve core 5 to accurately control the valve core 5 to rotate to different angles and test the working characteristics of the limited angle motor at different angles. At the same time, the size and shape of the inner diameter of the diameter-adjusting nozzle 7 can be adjusted to quickly simulate different flow field environments.

[0057] like Figure 4 As shown, it is a test system diagram of the present invention, the test system of the limited angle motor test mechanism includes: an air source / hydraulic source, a pressure reducing device, a solenoid valve, a flow meter, a pressure gauge and an operation center; wherein the operation center includes a host computer, a controller, a tester, and a signal generator;

[0058] With the tested limited-angle motor and the limited-angle motor test mechanism as the center, the air source / hydraulic source enters the air inlet of the test mechanism through the pressure reducing device and the solenoid valve. The air inlet and exhaust ends are equipped with flow meters and pressure gauges, and temperature measuring points are set to achieve comprehensive monitoring of the inlet and outlet fluids; the operation center realizes the simulation, adjustment, control and monitoring of the test situation;

[0059] In the operation center, the signal generator is used to simulate the operating status characterization signal that the system feeds back to the controller in actual use conditions; the controller is used to receive the signal from the signal generator, and control the rotation of the limited angle motor according to the established program based on the signal; the tester is used to collect the flow, temperature, pressure and current and voltage data at both ends of the limited angle motor in the system; the host computer is used to receive and store data in the tester, set the frequency and waveform of the analog signal in the signal generator, and set the specific parameters of the program in the controller.

[0060] like Figure 5 As shown in the figure, the response time judgment basis of the limited angle motor in the present invention is the phase current waveform of the limited angle motor. At time t0, the current is input and the limited angle motor starts to work. s At the moment, the current at both ends of the limited angle motor becomes a stable value or zero, the limited angle motor rotates to the position and stops working. The time difference between these two positions is t Δ =t s -t0 is the response time.

[0061] The above solution of the present invention has the following innovations:

[0062] (1) The present invention uses the adjustment of parameters such as fluid flow rate / pressure / temperature to achieve precise load control of the limited angle motor;

[0063] (2) The present invention accurately determines the response time of the limited-angle motor by testing the phase current-time curve of the limited-angle motor;

[0064] (3) The parts in the flow channel of the testing mechanism of the present invention can be quickly replaced, and the structural dimensions that affect the fluid flow can be quickly adjusted.

[0065] like Figure 6 As shown in the figure, it is a test flow chart of the test system in the embodiment, and the limited angle motor test method includes the following steps:

[0066] (1) Confirm the flow field size according to the actual product, adjust the valve core 5 and the diameter size d and shape of the diameter regulating nozzle 7 to meet the test requirements, install the limited angle motor test mechanism, and install the limited angle motor to be tested;

[0067] (2) Confirm the flow field inlet and outlet conditions, including pressure P, temperature T, flow F, and set the air source / hydraulic source parameters;

[0068] (3) Set the signal generator output value U sig The frequency and waveform are used to simulate the sensor return signal value under real working conditions;

[0069] (4) The controller starts working, turns on the signal generator signal output, turns on the air source / hydraulic source end solenoid valve, and the controller outputs the signal value U according to the preset threshold. sig After the judgment, the limited angle motor is driven to rotate and stop at different angle positions. The tester reads the phase voltage U and phase current I of the limited angle motor and the test data of each fluid, including the inlet pressure P i , Temperature T i , flow rate F and each outlet pressure P out1 , Temperature T out1 Flow F out1 ,…,P outn , T outn 、F outn , and feedback to the host computer;

[0070] (5) After the test is completed, first determine whether the parameters of each outlet fluid meet the requirements. If not, it is necessary to modify the size d and shape of the diameter-adjusting nozzle and then conduct the above test. If the requirements are met, proceed to the next step (6);

[0071] (6) Determine the response time t based on the finite angle motor phase current I curve. If it is less than the maximum response time, it meets the requirements and is a qualified product. If it exceeds the response time requirements, it is a failed product.

[0072] Parts of the present invention that are not described in detail belong to common knowledge among those skilled in the art.

Claims

1. A limited angle motor testing mechanism, characterized in that include: Core rotating part, main structure part, flow field outlet and inlet regulating part; The core rotating part includes a valve core (5), a wave spring (11), a first bearing (12) and a second bearing (15); The main structure comprises a transfer flange (2), a housing (3), a valve core sleeve (4), a bearing adjustment ring (8), a bottom cover (9) and a guide key (13); The flow field outlet and inlet regulating part comprises: a joint (6), a diameter regulating nozzle (7) and a sealing gasket (14); The housing (3) is a nearly cubic structure, with a through hole as the center hole opened along the central axis in the vertical direction, and a horizontal through hole opened on the side wall of the cubic structure, which is connected to the center hole; the valve core sleeve (4) is directionally installed in the middle position of the center hole of the housing (3), and the position is fixed by a guide key (13); the valve core (5) is installed inside the valve core sleeve (4), and the second bearing (15) is placed in the bearing adjustment ring (8), and is set at the bottom of the center hole through the bearing adjustment ring (8). The bearing adjustment ring (8) is fixed in position by the bottom cover (9) and ensures sealing; the lower end of the valve core (5) is matched and connected with the second bearing (15); the upper end of the valve core (5) is matched and connected with the first bearing (12), and the first bearing (12) is installed in the valve core sleeve (4); a wave spring (11) is arranged between the first bearing (12) and the valve core sleeve (4); the measured limited angle motor (2) is installed above the housing (3) through the adapter flange (3), and the motor extends out of the shaft to connect the valve core (5); The horizontal through hole on the side wall of the shell (3) is a circular hole in the radial direction of the central hole where the core rotating part is located. A diameter-adjusting nozzle (7) is installed inside the circular hole, and a joint (6) is installed outside the circular hole. A sealing gasket (14) is provided between the joint (6) and the shell (3).

2. A limited-angle motor testing mechanism according to claim 1, characterized in that: The installation height of the second bearing (15) in the housing (3) is adjusted by changing the size of the bearing adjustment ring (8).

3. A limited-angle motor testing mechanism according to claim 1, characterized in that: The wave spring (11) is installed between the first bearing (12) and the valve core sleeve (4), and the axial clearance is eliminated by the preload force provided by the wave spring (11) when it is compressed.

4. A limited angle motor testing mechanism according to claim 1, characterized in that: The core rotating part rotates in the test mechanism and is affected by the resistance torque generated by the flow field. At the same time, the flat shaft at the upper end of the valve core (5) is connected to the extended shaft of the limited angle motor (1) to be tested, so that the resistance torque is applied to the limited angle motor (1) to be tested.

5. The limited-angle motor testing mechanism according to claim 1, characterized in that: When a joint (6) does not need to be installed outside the circular hole, a plug (10) is installed.

6. A limited-angle motor testing mechanism according to claim 1, characterized in that: The limited-angle motor testing mechanism is provided with three joints (6), namely an inlet joint (6-1), an outlet joint (6-2) and an outlet joint (6-3); During the test, the fluid source enters the test mechanism through the inlet connector (6-1), passes through the central through hole of the valve core (5), flows to the outlet connector (6-3), and leaves the interior of the test mechanism. At this time, the controller drives the limited angle motor (1) to rotate in the clockwise direction, so that the valve core (5) starts to rotate under its drive. When the valve core (5) rotates 90 degrees clockwise, the right-angle passage inside the valve core (5) connects the fluid inlet connector (6-1) with the left fluid outlet connector (6-2).

7. A limited-angle motor testing mechanism according to claim 6, characterized in that: A position sensor is installed at the lower end of the valve core (5) to accurately control the valve core (5) to rotate to different angles, thereby testing the working characteristics of the limited angle motor when it is located at different angles. At the same time, by adjusting the size and shape of the inner diameter of the diameter-adjusting nozzle (7), different flow field environments can be quickly simulated.

8. The limited-angle motor testing mechanism according to claim 6, characterized in that: The basis for judging the response time of the limited-angle motor is the phase current waveform of the limited-angle motor. At time t0, the current is input and the limited-angle motor starts to work. s At the moment, the current at both ends of the limited angle motor becomes a stable value or zero, the limited angle motor rotates to the position and stops working. The time difference between these two positions is t Δ =t s -t0 is the response time.

9. A test system for a limited-angle motor test mechanism as claimed in any one of claims 1 to 8, characterized in that include: Air source / hydraulic source, pressure reducing device, solenoid valve, flow meter, pressure gauge and operation center; the operation center includes host computer, controller, tester and signal generator; With the tested limited-angle motor and the limited-angle motor test mechanism as the center, the air source / hydraulic source enters the air inlet of the test mechanism through the pressure reducing device and the solenoid valve. The air inlet and exhaust ends are equipped with flow meters and pressure gauges, and temperature measuring points are set to achieve comprehensive monitoring of the inlet and outlet fluids; the operation center realizes the simulation, adjustment, control and monitoring of the test situation; In the operation center, the signal generator is used to simulate the operating status characterization signal that the system feeds back to the controller in actual use conditions; the controller is used to receive the signal from the signal generator, and control the rotation of the limited angle motor according to the established program based on the signal; the tester is used to collect the flow, temperature, pressure and current and voltage data at both ends of the limited angle motor in the system; the host computer is used to receive and store data in the tester, set the frequency and waveform of the analog signal in the signal generator, and set the specific parameters of the program in the controller.

10. A limited angle motor testing method, characterized in that include: (1) Confirm the flow field size according to the actual product, adjust the valve core (5) and the diameter adjustment nozzle (7) to meet the test requirements, install the limited angle motor test mechanism, and install the limited angle motor to be tested; (2) Confirm the flow field inlet and outlet conditions, including pressure P, temperature T, flow F, and set the air source / hydraulic source parameters; (3) Set the signal generator output value U sig The frequency and waveform are used to simulate the sensor return signal value under real working conditions; (4) The controller starts working, turns on the signal generator signal output, turns on the air source / hydraulic source end solenoid valve, and the controller outputs the signal value U according to the preset threshold. sig After the judgment, the limited angle motor is driven to rotate and stop at different angle positions. The tester reads the phase voltage U and phase current I of the limited angle motor and the test data of each fluid, including the inlet pressure P i , Temperature T i , flow rate F and each outlet pressure P out1 , Temperature T out1 Flow F out1 ,…,P outn , T outn 、F outn , and feedback to the host computer; (5) After the test is completed, first determine whether the parameters of each outlet fluid meet the requirements. If not, it is necessary to modify the size d and shape of the diameter-adjusting nozzle and then conduct the above test. If the requirements are met, proceed to the next step (6); (6) Determine the response time t based on the finite angle motor phase current I curve. If it is less than the maximum response time, it meets the requirements and is a qualified product. If it exceeds the response time requirements, it is a failed product.

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