A suspension height measurement system and method for a flywheel energy storage device

Abstract

The present invention relates to the technical field of measuring equipment, and provides a suspension height measurement system and a measurement method for a flywheel energy storage device, wherein the measurement system comprises: a lower suspension plate and a guide shaft, wherein the guide shaft is arranged on the upper surface of the lower suspension plate; an upper suspension plate, wherein the upper suspension plate is sleeved on the guide shaft; a pressure plate, wherein the pressure plate is sleeved on the guide shaft; a first permanent magnet and a second permanent magnet, wherein the first permanent magnet is fixedly arranged on the upper surface of the lower suspension plate, and the second permanent magnet is fixedly arranged on the lower surface of the upper suspension plate; a pressure sensor, wherein the pressure sensor is installed on the upper surface of the upper suspension plate; a rangefinder, wherein the rangefinder is used to measure the distance between the upper suspension plate and the lower suspension plate; and a plurality of positioning components, wherein the positioning components comprise positioning screws and nuts. The present invention provides a suspension height measurement system and a measurement method for a flywheel energy storage device, which can accurately derive the relationship between the flywheel gravity and the suspension height.

Description

Technical Field

[0001] The invention relates to the technical field of measuring equipment, and in particular to a suspension height measuring system and a measuring method for a flywheel energy storage device. Background Art

[0002] As an alternative to chemical batteries and supercapacitors, flywheel energy storage has the advantages of long life, low maintenance, high efficiency and high power. The principle of flywheel energy storage is to rely on motors to achieve charging and discharging, and rely on rotating flywheels to store energy. When charging, the motor drives the flywheel to rotate, and the flywheel converts electrical energy into kinetic energy and stores it; when discharging, the flywheel drives the motor, converts kinetic energy into electrical energy and releases it. During the energy storage process, the speed and size of the rotor in the motor determine how much energy the flywheel storage device can store.

[0003] However, from the perspective of flywheel energy storage, as the speed increases, the energy consumed to maintain the speed will increase, so energy loss must be considered in flywheel design. When the flywheel rotates, the friction of the bearings will consume a large part of the energy. Therefore, in flywheel design, permanent magnets or excitation are usually used to suspend the flywheel longitudinally to reduce flywheel energy loss. When the flywheel body rotates at high speed in the chamber, bearings and shock absorbers are required to accelerate the flywheel smoothly and maintain it at the rated speed. Therefore, in flywheel design, the determination of suspension height is the most important basic data for flywheel design.

[0004] For the combination of flywheels of different weights and suspension magnets of different magnetic fluxes, the suspension height needs to be determined before the drawing is designed, and the suspension height is measured by software calculation. Due to system assembly errors, different material magnetic conductivity properties and different magnet charging properties, this measurement method often causes large measurement errors, so it is impossible to accurately derive the relationship between flywheel gravity and suspension height. Summary of the invention

[0005] In view of the defects in the prior art, the purpose of the present invention is to provide a suspension height measurement system and method for a flywheel energy storage device, so that the relationship between the flywheel gravity and the suspension height can be accurately obtained.

[0006] According to one aspect of the present invention, a system for measuring the suspension height of a flywheel energy storage device is provided, comprising:

[0007] A lower suspension plate and a guide shaft, wherein the guide shaft is fixedly arranged on the upper surface of the lower suspension plate in the longitudinal direction;

[0008] An upper suspension plate, wherein the upper suspension plate is sleeved on the guide shaft and is slidably connected to the guide shaft;

[0009] A pressure plate, the pressure plate is sleeved on the guide shaft and slidably connected with the guide shaft, and the pressure plate is located above the upper suspension plate;

[0010] A first permanent magnet and a second permanent magnet, wherein the first permanent magnet is fixedly disposed on the upper surface of the lower suspension plate, and the second permanent magnet is fixedly disposed on the lower surface of the upper suspension plate and is located above the first permanent magnet, and the second permanent magnet and the first permanent magnet repel each other;

[0011] A pressure sensor, wherein the pressure sensor is mounted on the upper surface of the upper suspension plate;

[0012] a distance meter, which is mounted on the upper surface of the upper suspension plate through a fixing clamp and is used to measure the distance between the upper suspension plate and the lower suspension plate; and

[0013] A plurality of positioning assemblies are arranged at equal intervals along the circumference of the lower suspension plate, and the positioning assemblies include a positioning screw and a nut. The first end of the positioning screw is connected to the lower suspension plate, and the second end of the positioning screw passes through the pressure plate and extends upward. The nut is sleeved on the second end of the positioning screw and is threadedly connected to the second end of the positioning screw.

[0014] Furthermore, it also includes six equal-height blocks arranged between the lower suspension plate and the upper suspension plate, and the six equal-height blocks are detachably connected to the upper surface of the lower suspension plate or the lower surface of the upper suspension plate.

[0015] Furthermore, there are three pressure sensors, and the three pressure sensors are arranged at equal intervals along the circumference of the upper suspension plate.

[0016] Furthermore, there are three rangefinders, which are arranged at equal intervals along the circumference of the upper suspension plate.

[0017] Furthermore, the axis lines of the lower suspension plate, the guide shaft and the upper suspension plate are collinear.

[0018] Furthermore, the first permanent magnet and the second permanent magnet are both in annular structures and surround the periphery of the guide shaft.

[0019] Furthermore, the number of the positioning components is six.

[0020] According to another aspect of the present invention, a measurement method is provided, comprising the following steps:

[0021] Measure the gravity G2 of the upper suspension plate, the gravity G3 of the three rangefinders and the corresponding fixing clamps in advance;

[0022] According to the force analysis, the relationship between the repulsive force F between the first permanent magnet and the second permanent magnet and the sum TN of the measured values ​​of the three pressure sensors is obtained, F=TN+G2+G3;

[0023] According to the measurement value of the rangefinder, the relationship between the distance L between the upper suspension plate and the lower suspension plate and the sum TN of the measurement values ​​of the three pressure sensors is obtained;

[0024] Multiple measurements are performed, and coordinate points of multiple repulsive force F between the first permanent magnet and the second permanent magnet and distance L between the upper suspension plate and the lower suspension plate are marked according to the data obtained from the multiple measurements, and a relationship curve diagram is drawn.

[0025] Beneficial effects of the present invention: The present invention provides a system and method for measuring the suspension height of a flywheel energy storage device, which draws a relationship curve between the repulsive force F (in the design of a suspended flywheel, the repulsive force is reflected as the flywheel gravity) and the rangefinder measurement value L (i.e., the suspension height) according to data such as the repulsive force F between the first permanent magnet and the second permanent magnet, the pressure T formed between the repulsive force F and the six positioning screws, the gravity G1 of the pressure plate, the gravity G2 of the upper suspension plate, the gravity G3 of the fixing clamp and the rangefinder, the sum TN of the measurement values ​​of the three pressure sensors, and the measurement value L of the rangefinder, thereby accurately obtaining the relationship between the flywheel gravity and the suspension height. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the three-dimensional structure of this system;

[0027] Figure 2 This is a schematic diagram of the front view structure of the system.

[0028] Figure markings: 10 - lower suspension plate, 11 - guide shaft, 20 - upper suspension plate, 30 - pressure plate, 40 - first permanent magnet, 50 - second permanent magnet, 60 - pressure sensor, 70 - rangefinder, 71 - fixing clamp, 80 - positioning assembly, 81 - positioning screw, 82 - nut, 90 - equal height block. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0030] In this application, unless otherwise clearly specified and limited, the terms "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the description of the present application, it should be understood that the terms "longitudinal", "lateral", "horizontal", "top", "bottom", "up", "down", "inside" and "outside" etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0033] like Figure 1-2 As shown, the present invention provides a suspension height measurement system for a flywheel energy storage device, including a lower suspension plate 10, a guide shaft 11, an upper suspension plate 20, a pressure plate 30, a first permanent magnet 40, a second permanent magnet 50, a pressure sensor 60, a rangefinder 70 and a positioning assembly 80.

[0034] The guide shaft 11 is fixedly mounted on the upper surface of the lower suspension plate 10 along the longitudinal direction.

[0035] A first guide hole is formed in the middle of the upper suspension plate 20 . The upper suspension plate 20 is sleeved on the guide shaft 11 . The inner wall of the first guide hole is slidably connected to the guide shaft 11 .

[0036] A second guide hole is formed in the middle of the pressure plate 30 . The pressure plate 30 is sleeved on the guide shaft 11 . The inner wall of the second guide hole is slidably connected to the guide shaft 11 . The pressure plate 30 is located above the upper suspension plate 20 .

[0037] The first permanent magnet 40 is fixedly mounted on the upper surface of the lower suspension plate 10 , and the second permanent magnet 50 is fixedly mounted on the lower surface of the upper suspension plate 20 and is located above the first permanent magnet 40 . The second permanent magnet 50 and the first permanent magnet 40 repel each other.

[0038] The pressure sensor 60 is fixedly mounted on the upper surface of the upper suspension plate 20 .

[0039] The distance meter 70 is mounted on the upper surface of the upper suspension plate 20 through a fixing clamp 71 and is used to measure the distance between the upper suspension plate 20 and the lower suspension plate 10. The distance meter 70 used in the present application is not limited to various measuring instruments such as spring type and laser measurement.

[0040] There are multiple positioning assemblies 80, and the multiple positioning assemblies 80 are arranged at equal intervals along the circumference of the lower suspension plate 10. The positioning assembly 80 includes a positioning screw 81 and a nut 82. The first end of the positioning screw 81 is fixed in the slot of the lower suspension plate 10, and the second end of the positioning screw 81 passes through the pressure plate 30 upward and then extends upward. The nut 82 is sleeved on the second end of the positioning screw 81 and is threadedly connected with the second end of the positioning screw 81. The nut 82 can apply pressure to the pressure plate 30.

[0041] In one embodiment, six equal-height blocks 90 are further included between the lower suspension plate 10 and the upper suspension plate 20 , and the six equal-height blocks 90 are detachably connected to the upper surface of the lower suspension plate 10 or the lower surface of the upper suspension plate 20 .

[0042] In one embodiment, there are three pressure sensors 60 , and the three pressure sensors 60 are arranged at equal intervals along the circumference of the upper suspension plate 20 .

[0043] In one embodiment, there are three rangefinders 70 , which are arranged at equal intervals along the circumference of the upper suspension plate 20 , so that the distance between the upper suspension plate 20 and the lower suspension plate 10 measured can be more accurate.

[0044] In one embodiment, the axis lines of the lower suspension plate 10, the guide shaft 11 and the upper suspension plate 20 are collinear.

[0045] In one embodiment, the first permanent magnet 40 and the second permanent magnet 50 are both annular structures and surround the periphery of the guide shaft 11, so that the repulsive force between the first permanent magnet 40 and the second permanent magnet 50 will be distributed more evenly, making the system more stable during measurement.

[0046] In one embodiment, the number of positioning assemblies 80 is six.

[0047] Priority explanation: The gravity of the first permanent magnet 40 and the second permanent magnet 50 is small, so it is ignored in the subsequent calculation. And the gravity G2 of the upper suspension plate 20 and the gravity G3 of the three rangefinders 70 and the corresponding fixing clamps 71 are measured in advance.

[0048] Force analysis: A repulsive force F is formed between the first permanent magnet 40 and the second permanent magnet 50. When the nut 82 is turned downward, according to the principle of interaction force, the repulsive force F, the pressure T formed between the repulsive force F and the six positioning screws 81, the gravity G1 of the pressure plate 30, the gravity G2 of the upper suspension plate 20, and the gravity G3 of the three rangefinders 70 and the corresponding fixing clamps 71 form the following relationship: F=G1+G2+G3+T.

[0049] The relationship between the sum TN of the measured values ​​of the three pressure sensors 60 and the above physical quantity should be: TN=T+G1.

[0050] Then the substitution gives the repulsive force F=TN+G2+G3.

[0051] By measuring the distance L between the upper suspension plate 20 and the lower suspension plate 10 through the rangefinder 70, the relationship between TN and L is obtained, and then the relationship curve between the repulsive force F (in the design of the suspended flywheel, the repulsive force is reflected as the flywheel gravity) and the measured value L of the rangefinder 70 (i.e., the suspension height) is obtained according to the above equation, thereby accurately obtaining the relationship between the flywheel gravity and the suspension height.

[0052] The specific measurement process is as follows: first, six equal-height blocks 90 are set between the lower suspension plate 10 and the upper suspension plate 20 to define the initial distance L0 between the lower suspension plate 10 and the upper suspension plate 20. At this time, the nut 82 is adjusted to make the readings of the three pressure sensors 60 equal. Then adjust the fixing clamp 71 so that the readings of the three rangefinders 70 are L0, lock the fixing clamp 71, withdraw all the equal-height blocks 90, and readjust the nut 82 so that the readings of the three rangefinders 70 are L0. At this time, a set of coordinate points (F0, L0) of the repulsive force F (i.e., flywheel gravity) and the measured value L of the rangefinder 70 (i.e., suspension height) are obtained. Then continue to adjust the nut 82 to obtain multiple sets of coordinate points (F1, L1), (F2, L2), (F3, L3)...(FN, LN). Finally, draw a relationship curve.

[0053] A measurement method comprises the following steps:

[0054] S10: Measure the gravity G2 of the upper suspension plate 20 , the gravity G3 of the three rangefinders 70 and the corresponding fixing clamps 71 in advance.

[0055] S20: According to the force analysis, the relationship between the repulsive force F between the first permanent magnet 40 and the second permanent magnet 50 and the sum TN of the measured values ​​of the three pressure sensors 60 is obtained, F=TN+G2+G3.

[0056] S30: According to the measurement value L of the rangefinder 70, the relationship between the distance L between the upper suspension plate 20 and the lower suspension plate 10 and the sum TN of the measurement values ​​of the three pressure sensors 60 is obtained, and then the relationship between the repulsive force F (in the design of the suspended flywheel, the repulsive force is reflected as the flywheel gravity) and the measurement value L of the rangefinder 70 (i.e., the suspension height) is obtained.

[0057] S40: Perform multiple measurements, and mark the coordinate points of the repulsive force F (i.e., flywheel gravity) between the first permanent magnet 40 and the second permanent magnet 50 and the distance L (i.e., suspension height) between the upper suspension plate 20 and the lower suspension plate 10 according to the data obtained from the multiple measurements, and draw a relationship curve graph, so as to accurately obtain the relationship between the flywheel gravity and the suspension height.

[0058] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0059] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A suspension height measurement system for a flywheel energy storage device, characterized in that: include: A lower suspension plate (10) and a guide shaft (11), wherein the guide shaft (11) is fixedly arranged on the upper surface of the lower suspension plate (10) in the longitudinal direction; An upper suspension plate (20), the upper suspension plate (20) being sleeved on the guide shaft (11) and slidably connected to the guide shaft (11); A pressure plate (30), the pressure plate (30) being sleeved on the guide shaft (11) and slidably connected to the guide shaft (11), the pressure plate (30) being located above the upper suspension plate (20); a first permanent magnet (40) and a second permanent magnet (50), wherein the first permanent magnet (40) is fixedly arranged on the upper surface of the lower suspension plate (10), and the second permanent magnet (50) is fixedly arranged on the lower surface of the upper suspension plate (20) and is located above the first permanent magnet (40), and the second permanent magnet (50) and the first permanent magnet (40) repel each other; A pressure sensor (60), the pressure sensor (60) being mounted on the upper surface of the upper suspension plate (20); a distance meter (70), the distance meter (70) being mounted on the upper surface of the upper suspension plate (20) via a fixing clamp (71) and being used to measure the distance between the upper suspension plate (20) and the lower suspension plate (10); as well as a plurality of positioning assemblies (80), the plurality of positioning assemblies (80) being arranged at equal intervals along the circumference of the lower suspension plate (10), the positioning assemblies (80) comprising a positioning screw (81) and a nut (82), the first end of the positioning screw (81) being connected to the lower suspension plate (10), the second end of the positioning screw (81) passing through the pressure plate (30) upward and then extending upward, the nut (82) being sleeved on the second end of the positioning screw (81) and being threadedly connected to the second end of the positioning screw (81); It also includes six equal-height blocks (90) arranged between the lower suspension plate (10) and the upper suspension plate (20), wherein the six equal-height blocks (90) are detachably connected to the upper surface of the lower suspension plate (10) or the lower surface of the upper suspension plate (20); There are three pressure sensors (60), and the three pressure sensors (60) are arranged at equal intervals along the circumference of the upper suspension plate (20).

2. A suspension height measurement system for a flywheel energy storage device according to claim 1, characterized in that: There are three rangefinders (70), and the three rangefinders (70) are arranged at equal intervals along the circumference of the upper suspension plate (20).

3. The suspension height measurement system of a flywheel energy storage device according to claim 1, characterized in that: The axis lines of the lower suspension plate (10), the guide shaft (11) and the upper suspension plate (20) are collinear.

4. A suspension height measurement system for a flywheel energy storage device according to claim 1, characterized in that: The first permanent magnet (40) and the second permanent magnet (50) are both circular ring structures and surround the periphery of the guide shaft (11).

5. The suspension height measurement system of a flywheel energy storage device according to claim 1, characterized in that: The number of the positioning components (80) is six.

6. A measurement method, applied to the suspension height measurement system of the flywheel energy storage device according to any one of claims 1 to 5, characterized in that: The following steps are involved: Measuring in advance the gravity G2 of the upper suspension plate (20), the gravity G3 of the three rangefinders (70) and the corresponding fixing clamps (71); According to the force analysis, the relationship between the repulsive force F between the first permanent magnet (40) and the second permanent magnet (50) and the sum TN of the measured values ​​of the three pressure sensors (60) is obtained, F=TN+G2+G3; According to the measurement value of the distance meter (70), the relationship between the distance L between the upper suspension plate (20) and the lower suspension plate (10) and the sum TN of the measurement values ​​of the three pressure sensors (60) is obtained; Multiple measurements are performed, and based on the data obtained from the multiple measurements, multiple coordinate points of the repulsive force F between the first permanent magnet (40) and the second permanent magnet (50) and the distance L between the upper suspension plate (20) and the lower suspension plate (10) are marked, and a relationship curve graph is drawn.

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