Variable inertia and damping device with a vane screw rod

Abstract

The application discloses a variable inertia flywheel screw rod type inertia and damping equipment, which comprises upper hanging ears, screw rod cylinders welded with the upper hanging ears, main screw rods connected with the screw rod cylinders, variable inertia devices connected with the main screw rods, vibration suppression devices arranged on one side of the variable inertia devices, and lower hanging ears arranged on the side, away from the variable inertia devices, of the vibration suppression devices, wherein the main screw rods are rotationally connected with the screw rod cylinders, the main screw rods are arranged in the variable inertia devices and connected with both sides of the variable inertia devices through upper ball bearings and lower ball bearings, the main screw rods are connected with the vibration suppression devices, and the lower hanging ears are mounted on the vibration suppression devices through welding. The variable inertia flywheel screw rod type inertia and damping equipment has the advantages of good vibration isolation effect, simple structure, low cost, fast response, high reliability, easy installation and arrangement, high production efficiency and the like, effectively reduces the complexity of a force control system and reduces space occupancy, and meanwhile, the split type design reduces manufacturing difficulty, so that the design is easier to be close to actual production.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of damping force vibration absorption force control equipment, and particularly relates to a variable inertial flywheel screw rod type inertia and damping equipment. BACKGROUND

[0002] At present, force control equipment is widely applied, for example, is applied to the field of vehicle damping, the field of bridge and building vibration isolation, etc. However, the vibration isolation system based on the traditional vibration isolation theory cannot provide an effective solution to the contradiction between the optimization of damping effect and the working space of the equipment, which hinders the further development of the vibration isolation technology. According to the principle of mechanical-electrical similarity, the force flow in the mechanical system and the current in the electrical system, and the speed in the mechanical system and the voltage in the electrical system are corresponded respectively. On the basis of the original “spring-damping” two-element structure, the inertia equipment is added, so that the dynamic vibration absorption type vibration isolation structure which can buffer and attenuate high-frequency vibration and impact and also can buffer and attenuate low-frequency vibration and impact is realized.

[0003] The appearance of the inertial capacitor breaks the structure idea of the inherent “spring-damper” of the passive suspension, makes up for the lack of mass impedance in the traditional “spring-damper” network, and provides a new theoretical basis for the structural development of the shock absorbing equipment. The inertial capacitor is derived from the classic electromechanical similarity theory. In this corresponding relationship, in addition to the mass element, the spring, the inductor, the damper and the resistor are all two-point elements and have a strict corresponding relationship between each other. The mass element can only correspond to the grounded capacitor, which makes the “mass-capacitor” relationship in the electromechanical similarity theory not strictly corresponding, and also makes it difficult to apply the theoretical and research methods in the electrical network to the mechanical network, hindering the further development of the electromechanical similarity theory.

[0004] Meanwhile, the inertial capacitor is a device that uses the principle of rotational inertia to stabilize the motion of the system and can play an important role in various mechanical systems. The inertial capacitor has the advantages of high stability, fast response speed, small volume, light weight, low energy consumption, easy maintenance and wide application. In modern engineering, the inertial capacitor has been widely applied and will continue to play an important role in future development, and can be effectively applied to the design of vibration isolation systems.

[0005] However, the existing screw rod inertia container, i.e. the screw rod inertia container, is not particularly ideal when the inertia container is initially proposed for a suspension system, the inertia value is constant, the use effect is general, so the design of the inertia container with adjustable inertia value is required; At present, the force control equipment for dynamic vibration absorption has gear rack type, ball screw, hydraulic type, lever mass type, torsion type, small tooth difference planetary gear type, cycloidal steel ball type and other forms of equipment structure; However, these mechanisms for dynamic vibration absorption have complex processing technology, high impact load requirement of parts, high manufacturing cost, and are not easy to arrange, and the friction between parts is more, resulting in a certain gap between the final mechanism vibration isolation effect and the expected effect;

[0006] In view of the above situation, it is necessary to improve the existing inertia container so that it can adapt to the needs of the use of the inertia container. SUMMARY

[0007] The present application provides a variable inertia impeller screw rod type inertia and damping device, which integrates inertia device into damping device and realizes variable inertia design. The present application has simple structure, fewer parts, easy mass production, low cost and saves layout space. It can effectively solve the problems of high cost, large layout space, difficult after-sales maintenance, short service life, difficult processing and installation of existing vibration isolation systems containing inertia mass elements.

[0008] To achieve the above purpose, the technical scheme of the present application is a variable inertia impeller screw rod type inertia and damping device, comprising an upper lifting lug, a screw rod cylinder welded to the upper lifting lug, a main screw rod connected to the screw rod cylinder, a variable inertia device connected to the main screw rod, a vibration suppression device arranged on one side of the variable inertia device, and a lower lifting lug arranged on the side of the vibration suppression device away from the variable inertia device. The main screw rod is rotatably connected to the screw rod cylinder, the main screw rod is arranged in the variable inertia device and connected to both sides thereof through upper and lower ball bearings, the main screw rod is connected to the vibration suppression device, and the lower lifting lug is installed on the vibration suppression device by welding.

[0009] Further supplement to the technical solution, the variable lead screw cylinder, the variable lead screw arranged in the variable lead screw cylinder, the gear traction rod symmetrically arranged on the upper and lower ends of the variable lead screw, the gear arranged on the gear traction rod, and the rack meshing connected with the gear, both ends of the variable lead screw cylinder are connected with the main screw rod through the upper and lower ball bearings, and a plurality of fixing bolts are arranged on the side of the variable lead screw cylinder close to the screw cylinder for fixing the variable lead screw cylinder, the variable lead screw is fixedly installed on the outer surface of the main screw rod, one end of the gear traction rod is embedded in the lead of the variable lead screw, the upper and lower surfaces of the inner surface of the variable lead screw cylinder are also symmetrically provided with guide grooves, the other end of the gear traction rod is embedded in the guide groove, the gear is connected with the gear traction rod through the embedded gear bearing, the rack is fixedly installed in the variable lead screw cylinder, and the gear traction rod, the gear and the rack are arranged in pairs and two are a group.

[0010] Further supplement to the technical solution, the gear and the gear traction rod are provided with multiple groups, and the multiple groups of gears are symmetrically distributed around the variable lead screw, and the multiple groups of gears are connected with the gear traction rod through the embedded gear bearing and are meshing connected with the rack.

[0011] Further supplement to the technical solution, the vibration suppression device comprises a hydraulic cylinder, an impeller rod arranged in the hydraulic cylinder, and an impeller arranged on the impeller rod, the hydraulic cylinder is fixedly connected with the variable lead screw cylinder, the impeller rod is fixedly connected with the main screw rod, the impeller is fixedly installed on the impeller rod, and the hydraulic cylinder contains oil.

[0012] Further supplement to the technical solution, the impeller is arranged at a certain interval on the impeller rod.

[0013] Further supplement to the technical solution, the lead of the variable lead screw is continuously changed, the change rate of the middle lead is small, and the change rate of the two leads is large.

[0014] Further supplement to the technical solution, the material of the impeller is metal or special plastic or special ceramic, the material of the gear is metal, and the surfaces of the main screw rod and the variable lead screw need to be quenched or sprayed with iron fluorine.

[0015] Further supplement to the technical solution, the flywheel is further arranged on the end of the impeller rod away from the main screw rod, and the flywheel is fixedly installed on the impeller rod.

[0016] Further supplement to the technical solution, the oil is ordinary shock absorber oil or magnetic rheological fluid.

[0017] Further supplement to the technical solution, when arranged, the device needs to be used in parallel with at least one spring element.

[0018] The application has the advantages of good vibration isolation effect, simple structure, low cost, fast response, high reliability, easy installation and arrangement, high production efficiency, etc.

[0019] 1. The inertia device and damping device realized by the application have simple structure, which can effectively reduce the cost, structural complexity and failure rate of the vibration isolation system, is convenient for large-scale production and practical application, and is superior to many existing designs in installation and subsequent maintenance, and has very important practicality for the improvement of modern mechanical vibration isolation system technology.

[0020] 2. The application uses the rotation of the impeller in the oil to generate damping as a way to absorb mechanical vibration, discarding the design of using moving parts, thereby greatly reducing the internal mechanical friction and mechanical delay of the vibration isolation system, greatly improving the response capability and vibration isolation performance of the system, and having very important significance for high efficiency and high performance of the system.

[0021] 3. The application realizes variable inertia design, which integrates the inertia container device, inertia device and damping device that is simple, feasible, convenient to manufacture and has variable inertia value according to the working condition, so that the instantaneous impact caused by the unchangeable inertia value, insufficient part strength and stiffness or the lack of damping buffer setting is effectively solved, which plays a leading role in the update and iteration of future engineering vibration reduction equipment. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structure schematic diagram of a first embodiment of a variable inertia impeller screw rod type inertia and damping device of the application;

[0023] Figure 2 is Figure 1 a partial enlarged structure schematic diagram of the variable lead screw rod and the gear;

[0024] Figure 3 is Figure 1 a mounting three-dimensional structure schematic diagram of the main screw rod and the variable lead screw rod;

[0025] Figure 4 is a structure schematic diagram of a second embodiment of a variable inertia impeller screw rod type inertia and damping device of the application;

[0026] In the figure, 1, the upper lifting lug; 2, the screw cylinder; 3, the main screw; 4, the fixing bolt; 5, the upper ball bearing; 6, the variable lead screw cylinder; 7, the rack; 8, the variable lead screw; 9, the gear; 10, the gear bearing; 11, the gear traction rod; 12, the guide rail slot; 13, the lower ball bearing; 14, the hydraulic cylinder; 15, the impeller; 16, the lower lifting lug; 17, the impeller rod; 18, the flywheel. DETAILED DESCRIPTION

[0027] Example 1; In order to make the technical solution more clear to those skilled in the art, the specific structure and principle of the technical solution will be described below in combination with the accompanying drawings Figures 1-4 of the technical solution:

[0028] A variable inertia flywheel screw type inertia and damping device, comprising an upper lifting lug 1, a screw cylinder 2 welded to the upper lifting lug 1, a main screw 3 connected to the screw cylinder 2, a variable inertia device connected to the main screw 3, a vibration suppression device arranged on one side of the variable inertia device, and a lower lifting lug 16 arranged on the side of the vibration suppression device away from the variable inertia device, the main screw 3 is rotationally connected to the screw cylinder 2, and when the main screw 3 moves up and down on the screw cylinder 2, the main screw 3 can perform self-rotation motion; the main screw 3 is arranged in the variable inertia device and connected to both sides thereof through the upper ball bearing 5 and the lower ball bearing 13, the main screw 3 is connected to the vibration suppression device, and the lower lifting lug 16 is installed on the vibration suppression device by welding; in operation, the upper lifting lug 1 is connected to the vibration source, and the lower lifting lug 16 is connected to the device requiring vibration isolation; when the screw cylinder 2 moves up and down, the main screw 3 performs self-rotation motion, and since the main screw 3 is connected to the variable inertia device, it can also drive the variable inertia device to perform self-rotation motion, and the vibration suppression device can suppress the damping effect of the variable inertia device.

[0029] The design points of the technical scheme will be described in detail below. Firstly, the variable inertia device includes a variable lead screw cylinder 6, a variable lead screw 8 arranged in the variable lead screw cylinder 6, gear traction rods 11 symmetrically arranged at the upper and lower ends of the variable lead screw 8, gears 9 arranged on the gear traction rods 11, and a rack 7 meshingly connected with the gears 9. The two ends of the variable lead screw cylinder 6 are connected with a main screw rod 3 through upper and lower ball bearings 5 and 13. The variable lead screw cylinder 6 is also provided with a plurality of fixing bolts 4 on the side close to the screw cylinder 2 for fixing the variable lead screw cylinder 6 and preventing the axial movement of the variable lead screw cylinder 6. The variable lead screw 8 is fixedly installed on the outer surface of the main screw rod 3. One end of the gear traction rod 11 is embedded in the lead of the variable lead screw 8. The upper and lower surfaces of the inner surface of the variable lead screw 8 are also symmetrically provided with guide grooves 12. The other end of the gear traction rod 11 is embedded in the guide groove 12. The gears 9 are connected with the gear traction rods 11 through the embedded gear bearings 10. The rack 7 is fixedly installed in the variable lead screw cylinder 6. The lead of the variable lead screw 8 is continuously changed, the change rate of the middle lead is small, and the change rate of the leads on both sides is large. When the main screw rod 3 rotates, the variable lead screw 8 is fixed in the variable lead screw cylinder 6 through the upper and lower ball bearings 5 and 13, so that the main screw rod 3 rotates and the variable lead screw 8 also rotates. The gear traction rod 11 rotates accordingly. Since the gears 9 are meshingly connected with the rack 7, the gear traction rod 11 can drive the gears 9 to rotate on the rack 7. The variable lead design achieves the variable inertia effect. The lead of the variable lead screw 8 is continuously changed to achieve the infinite change of the inertia coefficient. The lead of the variable lead screw 8 can be set according to specific requirements or specific conditions. The rotational inertia generated by the rotation of the gears 9 on the rack 7 is much larger than the inertia effect of the physical mass, so the device can use a small physical mass to generate a large inertia force, achieving the effect of inertia efficiency, that is, the inertia coefficient is much larger than the actual physical mass.

[0030] Among them, the gear traction rod 11, the gear 9 and the rack 7 are arranged in pairs and two are a group; in the working process, the gear 9 and the gear traction rod 11 are provided with multiple groups, and the multiple groups of gears 9 are symmetrically distributed around the variable lead screw 8. The multiple groups of gears 9 are connected with the gear traction rods 11 through the embedded gear 9 bearings and are meshingly connected with the rack 7.

[0031] Then the vibration suppression device, it includes hydraulic cylinder 14, setting in the hydraulic cylinder 14 impeller rod 17, setting on the impeller rod 17 impeller 15, hydraulic cylinder 14 is fixedly connected with variable lead screw rod cylinder 6, impeller rod 17 is fixedly connected with main screw rod 3, impeller 15 is fixedly installed on the impeller rod 17, hydraulic cylinder 14 is loaded with oil, when the main screw rod 3 carries out autorotation, impeller rod 17, impeller 15 rotates along with the rotation of main screw rod 3, and the oil in the hydraulic cylinder 14 makes the rotating impeller 15 produce damping effect, thereby achieving the effect of suppressing vibration, so that the device can be better protected from damage caused by sudden vibration, severe shock and other conditions, and the requirements for the strength and size of the parts are reduced. Figure 1 As shown in the figure, the technical solution adopts a group of gears 9 and two groups of impellers 15, which can increase or reduce the number of gears 9 or change the mass and material of gears 9, and change the number and shape of impellers 15, so that the equipment obtains better damping coefficient, and the vibration isolation system can exert the maximum vibration isolation effect. When the hydraulic cylinder 14 uses magnetorheological fluid, the damping distribution of the magnetorheological fluid can be changed to achieve variable damping coefficient, wherein the material of the impeller 15 is metal or special plastic or special ceramic, the material of the gear 9 is metal, and the surfaces of the main screw rod 3 and the variable lead screw rod 8 need to be quenched or sprayed with iron fluoride;

[0032] The inertial coefficient of the device can be expressed as:

[0033] In the formula, P is the lead of the variable lead screw rod, is the mass of the gear, is the height of the gear, is the effective radius of the gear, when vibration occurs, the variable lead screw rod 8 rotates on the rack 7 with the gear 9, at this time, the rolling speed of the gear 9 is changed with the continuous change of the lead of the variable lead screw rod 8, thereby achieving the effect of variable inertial coefficient.

[0034] The above formula shows that the required inertial coefficient can be designed by selecting appropriate lead parameter change rate of the variable lead screw rod 8, or by selecting gear geometric size, material density and other parameters, thereby controlling mechanical force.

[0035] When the device is working, the device needs to be used in parallel with at least one spring element to form a vibration isolation system, which prevents the vibration isolation device from being crushed by the gravity of the device to be isolated, resulting in breakdown and loss of vibration isolation function.

[0036] The working principle of the embodiment will be described in detail below, as Figure 1 ​As shown, the upper hanging ear 1 at the top end of the screw rod cylinder 2 is connected to the vibration source, the lower hanging ear 16 at the bottom of the hydraulic cylinder 14 is connected to the device to be isolated, and a spring element is connected in parallel. When the vibration source generates vibration, it drives the screw rod cylinder 2 to move up and down, so that the main screw rod 3 rotates, at this time, the variable lead screw 8 rotates in the variable lead screw cylinder 6 through the upper ball bearing 5 and the lower ball bearing 13, and the variable lead screw 8 drives the gear traction rod 11 to move to achieve the rolling of the gear 9 on the rack 7; Because of the variable lead design, the variable inertia effect is achieved. Because the lead of the variable lead screw 8 is designed to change continuously, the inertia coefficient is infinitely variable; Because the variable lead screw 8 rotates to drive the gear traction rod 11 to move and in turn drive the symmetrically arranged gear 9 on the rack 7 to rotate, the rotational inertia generated by the gear 9 is much larger than the inertia of its physical mass, so the device can use smaller physical mass to generate larger inertia force, achieving the effect of inertia efficiency, that is, the inertia coefficient is much larger than the actual physical mass; When the main screw rod 3 rotates, it can drive the impeller rod 17 and the impeller 15 to rotate, and the hydraulic cylinder 14 contains oil to generate damping effect on the rotating impeller 15 to achieve the effect of suppressing vibration, so as to better protect the device from damage caused by sudden vibration and severe shock, and reduce the requirements for the strength and size of the parts.

[0037] Example 2; Different from example 1, in the working process, considering that the gear 9 itself is relatively light and cannot provide enough inertia coefficient, as shown in Figure 4 The technical solution of the present application provides enough inertia coefficient by providing a flywheel 18 on the impeller 15 rod away from the main screw rod 3 side end, and the flywheel 18 is fixedly installed on the impeller rod 17, so as to provide enough inertia coefficient, or by increasing the transmission ratio to provide enough inertia coefficient.

[0038] The above technical solution only embodies the preferred technical solution of the present application, and some changes made by the person skilled in the art to some parts of the present application also embody the principle of the present application and are within the protection scope of the present application.

Claims

1. A variable inertial capacity impeller-screw type inertial and damping device, characterized in that, The device includes an upper lifting lug (1), a screw cylinder (2) welded to the upper lifting lug (1), a main screw (3) connected to the screw cylinder (2), a variable inertia capacity device connected to the main screw (3), a vibration suppression device located on one side of the variable inertia capacity device, and a lower lifting lug (16) located on the side of the vibration suppression device away from the variable inertia capacity device. The main screw (3) is rotatably connected to the screw cylinder (2). The main screw (3) is located inside the variable inertia capacity device and connected to both sides of it through an upper ball bearing (5) and a lower ball bearing (13). The main screw (3) is connected to the vibration suppression device. The lower lifting lug (16) is installed on the vibration suppression device by welding. The variable inertia capacity device includes a variable lead screw cylinder (6), a variable lead screw (8) disposed within the variable lead screw cylinder (6), gear traction rods (11) symmetrically disposed at the upper and lower ends of the variable lead screw (8), a gear (9) disposed on the gear traction rods (11), and a rack (7) meshing with the gear (9). The two ends of the variable lead screw cylinder (6) are connected to the main lead screw (3) via an upper ball bearing (5) and a lower ball bearing (13). Several fixing bolts (4) are also provided on the side of the variable lead screw cylinder (6) near the cylinder barrel (2) for fixing the variable lead screw cylinder (6). The variable lead screw (8) is fixedly installed on the outer surface of the main screw (3). One end of the gear traction rod (11) is embedded in the lead of the variable lead screw (8). The inner surface of the variable lead screw cylinder (6) is also symmetrically provided with guide rail grooves (12). The other end of the gear traction rod (11) is embedded in the guide rail groove (12). The gear (9) is connected to the gear traction rod (11) through the embedded gear bearing (10). The rack (7) is fixedly installed in the variable lead screw cylinder (6). The gear traction rod (11), gear (9), and rack (7) are arranged in pairs and two are a group. The vibration suppression device includes a hydraulic cylinder (14), an impeller rod (17) disposed in the hydraulic cylinder (14), and an impeller (15) disposed on the impeller rod (17). The hydraulic cylinder (14) is fixedly connected to a variable lead screw cylinder (6), the impeller rod (17) is fixedly connected to a main lead screw (3), and the impeller (15) is fixedly installed on the impeller rod (17). The hydraulic cylinder (14) is filled with oil.

2. A variable inertial and damping device of the flywheel-screw type according to claim 1, characterized in that, The gear (9) and gear traction rod (11) are provided in multiple sets. The multiple sets of gears (9) are symmetrically distributed around the variable lead screw (8). The multiple sets of gears (9) are connected to the gear traction rod (11) by embedded gear bearings (10) and are meshed with the rack (7).

3. A variable inertial and damping device of the flywheel-screw type according to claim 1, characterized in that, The impeller rod (17) has one impeller (15) or multiple impellers (15) spaced apart.

4. The variable inertial flywheel screw-type inertial and damping device of claim 1, wherein, The lead of the variable lead screw (8) changes continuously, and the rate of change of the middle lead is lower than the rate of change of the two side leads.

5. The variable inertance and damping apparatus of claim 1, wherein, The impeller (15) is made of metal, special plastic or special ceramic, the gear (9) is made of metal, and the surfaces of the main lead screw (3) and the variable lead screw (8) need to be hardened.

6. A variable inertial flywheel screw-type inertial and damping device according to claim 1, characterized in that, A flywheel (18) is also provided on the end of the impeller rod (17) away from the main lead screw (3), and the flywheel (18) is fixedly installed on the impeller rod (17).

7. The variable inertance and damping apparatus of claim 1, wherein, The fluid is either ordinary shock absorber oil or magnetorheological fluid.

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