Eccentric shaft rotating energy storage and heat dissipation structure

Abstract

The utility model relates to a flywheel auxiliary heat dissipation technical field of ramming equipment, more specifically, relate to an eccentric shaft rotation energy storage heat dissipation structure. The utility model discloses a hub and annular rim, and the rim is installed around the hub outer periphery, and the hollow ring is formed between the rim and the hub, and the vane assembly is installed in the hollow ring, and the rim is connected with the hub through the vane assembly, and the kinetic energy is stored in the form of mechanical energy, and then energy storage release is realized, and simultaneously the vane assembly inhales air and generates high pressure airflow and blows out to realize heat dissipation cooling, improve the continuous operation ability of equipment, and reduce the maintenance cost of equipment.

Description

Technical Field

[0001] This utility model relates to the field of flywheel auxiliary heat dissipation technology for tamping equipment, and more specifically, to an eccentric shaft rotation energy storage and heat dissipation structure. Background Technology

[0002] Railway tamping equipment is a key piece of equipment in railway line maintenance. One of its core functions is to generate excitation force through the high-frequency vibration of an eccentric shaft, thereby achieving tamping operations. As the core component of the vibration mechanism, the eccentric shaft is typically driven by a hydraulic or electric motor and bears periodic impact loads during high-speed rotation. However, in actual operation, due to drastic load changes and high vibration frequency, the eccentric shaft often operates under high temperature and high load conditions, easily leading to overheating due to poor heat dissipation, severely affecting the equipment's service life and operational reliability. Currently, common eccentric shaft structures typically install a flywheel at its tail, whose main function is to store energy through rotational inertia and release energy during tamping to maintain a stable excitation force output and ensure tamping effectiveness. However, existing flywheels are integral metal disc structures with only energy storage functions and lack active heat dissipation capabilities. During long-term continuous operation, the bearings cannot effectively dissipate heat, causing the temperature to rise continuously, easily leading to lubrication failure, material fatigue, and other problems, seriously affecting the equipment's continuous operation capability and maintenance costs. In addition, there are existing technologies that improve heat dissipation by adding cooling systems, but these methods are often complex in structure, occupy a lot of space, and are not easy to integrate with existing tamping equipment, which greatly limits their practical application.

[0003] Therefore, there is an urgent need for a device that can improve the flywheel's heat dissipation capacity while maintaining its original energy storage function, and at the same time reduce the bearing temperature in an economical, simple and efficient way to achieve stable and reliable operation of the equipment. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the prior art by providing an eccentric shaft rotation energy storage and heat dissipation structure. This invention includes a hub and an annular rim. The rim is mounted around the outer periphery of the hub, forming a through-hole ring between the rim and the hub. A blade assembly is installed inside the hollow ring. The rim and the hub are connected through the blade assembly. The rim stores kinetic energy as mechanical energy, thereby achieving energy storage and release. Simultaneously, the blade assembly draws in air and generates a high-pressure airflow, which is then blown out to achieve heat dissipation and cooling, improving the continuous operation capability of the equipment and reducing maintenance costs.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An eccentric shaft rotation energy storage and heat dissipation structure includes a hub and an annular rim. The rim is installed around the outer periphery of the hub, and a through hollow ring is formed between the rim and the hub. A blade assembly is installed inside the hollow ring. The rim and the hub are connected by the blade assembly. The rim stores kinetic energy in the form of mechanical energy to achieve energy storage and release. The blade assembly draws in air and generates a high-pressure airflow to blow it out to achieve cooling.

[0007] Furthermore, the rim uses a solid metal ring as an energy storage component to ensure that the rim stores sufficient mechanical energy.

[0008] Furthermore, the blade assembly includes several fan blades circumferentially distributed between the hub and the rim. One end of each fan blade is fixed to the hub, and the other end is fixed to the rim. An air duct is formed between adjacent fan blades. The axial length of each fan blade is equal to the thickness of the rim. The fan blade serves as a rigid connector to ensure that the rim and the hub rotate coaxially and to guarantee the stability of the overall structure.

[0009] Furthermore, the fan blades are straight and inclined relative to a reference plane, which is parallel to the axial plane of the rim. The number of fan blades is 6 to 10, thereby ensuring the matching of the air duct spacing and airflow.

[0010] Furthermore, the number of fan blades is 6.

[0011] Furthermore, the tilt angle of the fan blade relative to the reference plane is 7° to 12°, the angle interval between two adjacent fan blades is 36° to 60°, and the ratio of the fan blade thickness to the outer diameter of the rim is 70 to 87.5:1. The fan blade smoothly captures air through a small tilt angle, and while ensuring that the fan blade has sufficient load-bearing capacity, it avoids excessive air resistance caused by a large tilt angle.

[0012] Furthermore, the tilt angle of the fan blade relative to the reference plane is 9°, the angular interval between two adjacent fan blades is 60°, and the ratio of the fan blade thickness to the outer diameter of the rim is 77.5:1.

[0013] Furthermore, the circumference width of the rim is greater than the circumference width of the hollow ring, and the ratio of the outer diameter of the rim to the rim thickness is 6.5 to 8:1.

[0014] Furthermore, the ratio of the circumference width of the rim to the circumference width of the hollow ring is 1.1 to 1.25:1, and the ratio of the outer diameter of the rim to the rim thickness is 7:1, so that the length of the fan blade matches the circumference width of the rim. The radial rigidity provided by the fan blade ensures the connection strength and guarantees the stable output of the tamping force.

[0015] Furthermore, the ratio of the rim width to the hollow ring width is 1.22:1.

[0016] Furthermore, a through mounting position is provided at the hub axis, and the main journal of the eccentric shaft is fixedly connected to the inner wall of the mounting position, and the main journal is connected to a rotary motor.

[0017] Furthermore, the axial length of the hub is greater than the thickness of the rim. The rim, hub, and main journal rotate synchronously, and their axes are all on the same straight line. This allows the fan blades to draw in air axially and then spray cooling air towards the bearing seat of the eccentric shaft. By utilizing the principle of forced convection heat transfer, the heat generated by friction and load impact on the eccentric shaft is continuously carried away, thereby cooling the hot parts of the eccentric shaft.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This invention involves installing a wheel rim around the outer periphery of a wheel hub, forming a through hollow ring between the wheel rim and the wheel hub. A blade assembly is installed inside the hollow ring, and the wheel rim and the wheel hub are connected through the blade assembly. The wheel rim stores kinetic energy in the form of mechanical energy, thereby realizing energy storage and release. At the same time, the blade assembly draws in air and generates a high-pressure airflow to blow it out, thereby achieving heat dissipation and cooling, improving the continuous operation capability of the equipment, and reducing the maintenance cost of the equipment. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural view of the present invention;

[0021] Figure 2 This is the front view of the present invention;

[0022] Figure 3 This is a cross-sectional view of the present invention;

[0023] Figure 4 This is a schematic diagram of the installation of this utility model.

[0024] The labels in the diagram are as follows: 1. Fan blade; 2. Rim; 3. Hub; 4. Mounting position; 5. Eccentric shaft; a. Rim ring width; b. Hollow ring width. Detailed Implementation

[0025] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Example 1:

[0028] Please see Figure 1-4 An eccentric shaft rotation energy storage and heat dissipation structure includes a hub 3 and an annular rim 2. The rim 2 is installed around the outer periphery of the hub 3, and a through hollow ring is formed between the rim 2 and the hub 3. A blade assembly is installed inside the hollow ring, and the rim 2 and the hub 3 are connected through the blade assembly.

[0029] It should be noted that the flywheel structure provided by this utility model is installed at the end of the eccentric shaft of the tamping device, including a blade assembly, a hub 3 and an annular rim 2. When the hub 3 rotates, the rim 2, the blade assembly and the hub 3 rotate synchronously at high speed.

[0030] Because the high-speed rotating rim 2 has a huge moment of inertia, the flywheel stores the excess kinetic energy as mechanical energy during the stage of light rotational load; during the stage of increased load and need for huge excitation force, the flywheel releases the stored kinetic energy, thereby smoothly impacting the load and achieving the technical effect of energy storage and release, ensuring the stability and effectiveness of tamping force.

[0031] As the flywheel rotates, the blade assembly located inside the hollow ring works synchronously, stirring the air near the flywheel and drawing air in axially from one side of the flywheel. During the intake process, a high-pressure airflow is generated, which is then blown out at high speed from the other side of the flywheel, forming a directional cooling airflow. The cooling airflow is guided by the airflow direction to the key heat-generating part of the eccentric shaft, namely the eccentric shaft bearing, thereby continuously carrying away the heat generated by the bearing and achieving the purpose of cooling.

[0032] Preferably, the rim 2 uses a solid metal ring as an energy storage component.

[0033] It should be noted that during the flywheel energy storage process, the amount of energy stored is positively correlated with the moment of inertia, and the moment of inertia is positively correlated with the mass; that is, the heavier the mass, the greater the moment of inertia, and the greater the moment of inertia, the greater the energy stored. Therefore, a solid metal ring is used as the rim 2 to achieve the accumulation of more energy at the same rotational speed.

[0034] The blade assembly includes several fan blades 1 circumferentially distributed between the hub 3 and the rim 2. One end of the fan blade 1 is fixed to the hub 3, and the other end is fixed to the rim 2. An air duct is formed between adjacent fan blades 1. The axial length of the fan blade 1 is equal to the thickness of the rim 2.

[0035] When the flywheel rotates, the driving force is transmitted through the hub 3 to the root of each fan blade 1, which is the fixed connection point between the fan blade 1 and the hub 3. The fan blade 1, as a rigid connecting component, transmits torque to the rim 2, thus causing the rim 2 to rotate synchronously at high speed. The fan blade 1 withstands centrifugal force, torque, and airflow resistance, and the rigid connection ensures the coaxial rotation between the rim 2 and the hub 3 and the overall structural stability of the flywheel.

[0036] Preferably, the fan blade 1 is made of solid metal. Since the solid metal fan blade 1 has mass, its circumferentially distributed connection method not only achieves a fixed connection, but also has a corresponding moment of inertia. The fan blade 1 and the wheel rim 2 work together to store energy and help smooth the power fluctuations when the flywheel rotates at high speed.

[0037] During air intake, under the negative pressure of the airflow, air is drawn in from one side of the flywheel's axis. The air enters the air duct formed by the adjacent fan blades 1. Inside the air duct, the air is compressed and accelerated by the rotating fan blades 1, increasing the pressure and flow rate. The resulting high-speed airflow is thrown out from the other end of the air duct, forming a concentrated and directional cooling airflow. The cooling airflow continuously carries away the heat generated during the operation of the eccentric shaft, thus achieving a highly efficient and synergistic technical effect that integrates support, kinetic energy storage, and air cooling.

[0038] The air duct formed between adjacent fan blades 1 restricts the airflow path, prevents airflow from escaping, and ensures that the air is effectively accelerated and guided during the flow process, thereby improving wind pressure and air volume. Its heat dissipation effect is far superior to the simple air-stirring structure of the flywheel without fan blades 1 in the prior art.

[0039] The fan blade 1 is in the shape of a straight plate and is inclined relative to the reference plane. It should be noted that the reference plane is a cross-section of the axial plane parallel to the rim 2. The number of fan blades 1 is 6 to 10.

[0040] In this specific embodiment, the number of fan blades 1 is 6.

[0041] When the flywheel rotates at high speed, the straight plate-shaped fan blade 1, which is installed at an angle relative to the axial plane of the rim 2, starts to work. Its inclined surface continuously draws in the air in front of the flywheel into the air duct. It should be noted that the front of the flywheel is the side away from the eccentric shaft.

[0042] Furthermore, if the number of fan blades 1 is less than 6, the air duct spacing is too wide, which easily causes air to leak out from the gaps between adjacent fan blades 1, making it impossible to establish sufficient outlet air pressure and resulting in poor heat dissipation. If the number of fan blades 1 exceeds 10, the air duct spacing is too narrow, and the airflow friction resistance increases sharply, resulting in a significant decrease in airflow.

[0043] The use of straight-plate fan blades reduces production costs while making stress distribution easier to control, ensuring high reliability and easy cleaning and replacement, making it suitable for various complex industrial environments.

[0044] The tilt angle of the fan blade 1 relative to the aforementioned reference plane is 7° to 12°, the angle interval between two adjacent fan blades 1 is 36° to 60°, and the ratio of the thickness of the fan blade 1 to the outer diameter of the rim 2 is (70:1) to (87.5:1).

[0045] When the flywheel rotates, the fan blades 1 with a small tilt angle of 7° to 12° enable the fan blades 1 to effectively capture air while avoiding the huge air resistance caused by excessive tilt angle when interacting with the air, thereby smoothly and continuously delivering air axially from the front of the flywheel to the rear of the flywheel.

[0046] Since the mass and diameter of the rim 2 are positively correlated, it means that the load that the blade 1 needs to bear increases with the increase of the diameter of the rim 2. By determining the ratio of the thickness of the blade 1 to the outer diameter of the rim 2, it is ensured that each blade 1 has sufficient section modulus to bear the centrifugal force, aerodynamic load, and torque during operation, avoiding deformation or breakage. At the same time, the evenly distributed blades 1 form a space truss structure, rigidly connecting the rim and the hub, ensuring the overall structural integrity of the flywheel under high-speed rotation.

[0047] Specifically, in this embodiment, the tilt angle of the fan blade 1 relative to the above-mentioned reference plane is 9°, the angle interval between two adjacent fan blades 1 is 60°, the thickness of the fan blade 1 is 4.65mm, the outer diameter of the rim 2 is 350mm, and the ratio of the thickness of the fan blade 1 to the outer diameter of the rim 2 is 77.5:1.

[0048] The rim width of the rim 2 is greater than the rim width of the hollow ring, and the ratio of the outer diameter of the rim 2 to the thickness of the rim 2 is (6.5:1) to (8:1).

[0049] Preferably, the ratio of the ring width of the rim 2 to the ring width of the hollow ring is (1.1:1) to (1.25:1), and the ratio of the outer diameter of the rim 2 to the thickness of the rim 2 is 7:1.

[0050] like Figure 2 As shown, let the width of the rim 2 ring be a, and the width of the hollow ring be b, then a:b = (1.1:1) ~ (1.25:1).

[0051] In this specific embodiment, the ring width of the rim 2 is 75mm, the ring width of the hollow ring is 61.5mm, and a:b=1.22:1.

[0052] When the flywheel rotates at high speed, its energy storage capacity comes from the wider and heavier rim 2, supplemented by the rotational inertia provided by the blades 1. The wider rim 2 means that more mass is distributed at a position farther from the center of rotation. Since the width of the hollow ring is directly equal to the length of the blades 1, the ratio of the width of the rim 2 to the width of the hollow ring is (1.1:1) to (1.25:1). This means that the length of the blades 1 matches the width of the rim 2, so that at the same rotational speed, the radial rigidity provided by the blades 1 ensures the connection strength, allowing the centrifugal force to be smoothly transmitted from the blades 1 to the rim 2, ensuring a stable output of tamping force.

[0053] Meanwhile, the width ratio between the rim 2 and the hollow ring ensures the structural space required for heat dissipation, prevents air from being blocked by the rim 2, and ensures that the cooling airflow can be efficiently guided and passed through by the fan blade 1, thus achieving the optimal space allocation for energy storage and airflow.

[0054] Example 2:

[0055] Please see Figure 1-4 An eccentric shaft rotation energy storage and heat dissipation structure, according to embodiment 1, has a through mounting position 4 at the axis of the hub 3, and the main journal of the eccentric shaft 5 is fixedly connected to the inner wall of the mounting position 4. The main journal of the eccentric shaft 5 is connected to a rotary motor.

[0056] The axial length of the hub 3 is greater than the thickness of the rim 2. The rim 2, hub 3 and the main journal of the eccentric shaft 5 rotate synchronously, and the axes of the three are all located on the same straight line.

[0057] It should be noted that the eccentric shaft 5 includes a main journal and an eccentric journal. The main journal is the central shaft segment of the eccentric shaft 5 that is fitted with a bearing and is directly driven to rotate by a rotary motor. The axis of the main journal is the rotation center line of the eccentric shaft 5. The eccentric journal is the shaft segment whose center of mass is offset from the rotation center and is used to generate excitation force. The axis of the eccentric journal is parallel to the axis of the main journal but not collinear.

[0058] A rotary motor drives the main journal of the eccentric shaft 5 to rotate. The flywheel is rigidly fixed to the main journal of the eccentric shaft 5 via mounting position 4, allowing the flywheel and the main journal to rotate synchronously at high speed. When the flywheel rotates, the fan blade 1 draws air axially from the front of the flywheel, accelerates it through the air duct, and then sprays a concentrated cooling airflow at high speed towards the bearing housing of the eccentric shaft 5. The cooling airflow flows through the bearing of the main journal and the nearby housing structure, continuously carrying away the heat generated by friction and load impact using the principle of forced convection heat transfer, thus achieving the technical effect of cooling the hot parts of the eccentric shaft 5.

Claims

1. An eccentric shaft rotation energy storage and heat dissipation structure, characterized in that: It includes a hub and an annular rim, the rim being mounted around the outer periphery of the hub, a through hollow ring being formed between the rim and the hub, a blade assembly being mounted inside the hollow ring, and the rim and the hub being connected by the blade assembly.

2. The eccentric shaft rotation energy storage and heat dissipation structure according to claim 1, characterized in that: The rim uses a solid metal ring as an energy storage component.

3. The eccentric shaft rotation energy storage and heat dissipation structure according to claim 1, characterized in that: The blade assembly includes several fan blades circumferentially distributed between the hub and the rim. One end of each fan blade is fixed to the hub, and the other end of each fan blade is fixed to the rim. An air duct is formed between adjacent fan blades, and the axial length of each fan blade is equal to the thickness of the rim.

4. The eccentric shaft rotation energy storage and heat dissipation structure according to claim 3, characterized in that: The fan blades are straight and inclined relative to the reference plane, which is parallel to the axial plane of the rim. The number of fan blades is 6 to 10.

5. The eccentric shaft rotation energy storage and heat dissipation structure according to claim 4, characterized in that: The tilt angle of the fan blade relative to the reference plane is 7° to 12°, the angle interval between two adjacent fan blades is 36° to 60°, and the ratio of the fan blade thickness to the outer diameter of the rim is 70 to 87.5:

1.

6. The eccentric shaft rotation energy storage and heat dissipation structure according to claim 1, characterized in that: The rim width is greater than the hollow ring width, and the ratio of the outer diameter of the rim to the rim thickness is 6.5 to 8:

1.

7. The eccentric shaft rotation energy storage and heat dissipation structure according to claim 6, characterized in that: The ratio of the rim width to the hollow ring width is 1.1 to 1.25:1, and the ratio of the outer diameter of the rim to the rim thickness is 7:

1.

8. The eccentric shaft rotation energy storage and heat dissipation structure according to claim 1, characterized in that: A through mounting position is provided at the hub axis, and the main journal of the eccentric shaft is fixedly connected to the inner wall of the mounting position. The main journal is connected to a rotary motor.

9. The eccentric shaft rotation energy storage and heat dissipation structure according to claim 8, characterized in that: The axial length of the hub is greater than the thickness of the rim. The rim, hub, and main journal rotate synchronously, and their axes are all on the same straight line.

Images