CN117824812A - Damping method for weight loading - Google Patents
Damping method for weight loading Download PDFInfo
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- CN117824812A CN117824812A CN202410254927.1A CN202410254927A CN117824812A CN 117824812 A CN117824812 A CN 117824812A CN 202410254927 A CN202410254927 A CN 202410254927A CN 117824812 A CN117824812 A CN 117824812A
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- balance
- oil cylinder
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- 238000013016 damping Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000007667 floating Methods 0.000 claims abstract description 32
- 230000008569 process Effects 0.000 claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 7
- 230000033001 locomotion Effects 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 239000003921 oil Substances 0.000 claims description 32
- 230000005540 biological transmission Effects 0.000 claims description 7
- 239000010705 motor oil Substances 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 230000002401 inhibitory effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 4
- 238000011105 stabilization Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 208000032826 Ring chromosome 3 syndrome Diseases 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/06—Means for damping oscillations, e.g. of weigh beams
- G01G23/08—Means for damping oscillations, e.g. of weigh beams by fluid means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/01—Testing or calibrating of weighing apparatus
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
- G01M9/062—Wind tunnel balances; Holding devices combined with measuring arrangements
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a damping method for weight loading, which relates to the field of wind tunnel balance calibration and comprises the following steps: before the balance automatic loading device loads or unloads the weight through the driver control operation, when the external power mechanism drives the four-grab chuck to drive the throttling ring formed by the throttling sheets to be closed to the locking position, the throttling ring seals the annular gap between the lower cavity of the oil cylinder and the floating body, so that the lower cavity of the oil cylinder is in a sealing state, relative motion cannot be generated between the floating body and the oil cylinder, the load loaded and unloaded by the weight is born by the support frame of the fixed damping device, the load born by the balance is still kept to be the last loading working condition, and the load keeping function is completed. The invention provides a damping method for loading weights, which mainly has the functions of maintaining the load and inhibiting the swinging of the weights in the loading process.
Description
Technical Field
The invention relates to the field of wind tunnel balance calibration. More particularly, the present invention relates to a damping method for weight loading.
Background
The automatic calibration device for the balance based on the net weight of the weight is a widely used automatic calibration device for the balance, and one calibration device is usually provided with a plurality of automatic loading devices for loading a plurality of components of the balance according to a certain position arrangement. As shown in fig. 5, the automatic loading device mainly comprises a boom 10, weights 11, a supporting frame 12, a driver 13, a damping oil groove 14 and the like. When the balance is calibrated, the upper end of the suspender is connected with a corresponding loading hanging point. The principle is that a driver arranged on each layer of tray of a supporting frame of a loading device is used for controlling each weight to lift so as to complete the loading and unloading in the static calibration process of the balance: the driver puts down the weight, and the conical nest at the bottom center of the weight is automatically guided and hung on the suspender after contacting with the conical disc on the suspender to realize loading of the balance, and the driver jacks up the weight, so that the weight is separated from the loading suspender at the moment, and the balance is unloaded. Because weights with different masses are required to be exchanged in the process of loading and unloading a balance, different stress is caused among a plurality of suspenders in the process of exchanging, and the suspenders and weights hung on the suspenders can swing due to reset movement and the like after the balance is deformed during loading and unloading, one mode is to stabilize the swinging suspenders and weights by utilizing a damping oil groove at the bottom of the device at present.
As shown in fig. 6, the conventional damping oil sump is a passive damping device in which an oil sump 14 filled with oil is fixed to the bottom of a supporting frame, and a damping sheet 15 installed at the bottom of a boom and immersed in the oil of the oil sump generates viscous resistance when swinging along with the boom, and the swing of the boom is passively suppressed by the viscous resistance. Because the space is limited, the size of the damping oil groove is not big enough, and compared with a large load loading state with the magnitude of 500kg or more, the damping effect of viscous resistance generated by oil is poor, the weight stabilizing time is longer, and the loading efficiency is not high. Meanwhile, the existing damping device has no load holding function, namely, the increasing or decreasing trend in balance loading can be interrupted due to sudden change of loading load caused by weight exchange in the balance calibration process, even the instant overload of individual components of the calibrated balance can be caused, and the existing device cannot effectively process.
Naturally, in the prior art, the stabilization of the swinging boom and the weight is also completed by other methods, such as a load holding, vibration suppression and rapid stabilization method for a large-mass loading head with the application number of CN202311330590.X, which adopts a clamping device opening and closing strategy design to realize rapid stabilization of the loading weight; by utilizing the principle of the correlation between the load and the deformation, the clamping force of the clamping device ensures that the position of the weight suspender is unchanged in the loading process, thereby controlling the posture of the loading head, realizing the load maintenance in the calibration process, but the technology still has the following problems in practical application: in the process of clamping the suspender through the clamping device, under the condition of downward gravity and large load, the clamping mode is adopted to stabilize the suspender and the weight, and huge friction force is needed to realize the clamping, namely, the suspender clamp holder stops the suspender to move up and down through the clamping force, so that the suspender clamp needs huge friction force to realize the clamping, the reason is that the friction coefficient of steel and steel is approximately 0.1, the clamping mode is converted into friction force, and the clamping force is multiplied by 0.1 to realize the clamping, so that the suspender clamp holder needs 10X of clamping force, the clamping force which can be provided by the equipment is required to be higher, further, under the condition that the clamping force is larger, the space layout, the volume, the power and the like of the equipment are also increased, the corresponding space installation requirement is also increased for the automatic calibration equipment of the weight balance, and the further needs to be explained, the fact that the friction force which can be provided by the motor is not limited is also limited, namely, the friction force is not particularly large, the friction force is converted into the power, and the actual sliding load is not greatly matched with the actual load, and the actual sliding load is not changed, and the sliding load is not expected to be very low, and the method is not really applied to the balance.
Disclosure of Invention
It is an object of the present invention to address at least the above problems and/or disadvantages and to provide at least the advantages described below.
To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, there is provided a damping method for weight loading based on a damping device including an oil cylinder, a floating body, a throttle ring with a connecting rod, a four-jaw chuck, and a driving rod;
before the balance automatic loading device loads or unloads the weight through the driver control operation, when the external power mechanism drives the four-grab chuck to drive the throttling ring formed by the throttling sheets to be closed to the locking position, the throttling ring seals the annular gap between the lower cavity of the oil cylinder and the floating body, so that the lower cavity of the oil cylinder is in a sealing state, relative motion cannot be generated between the floating body and the oil cylinder, the load loaded and unloaded by the weight is born by the support frame of the fixed damping device, the load born by the balance still keeps the last loading working condition, and the function of keeping the load is completed.
Preferably, after the weight loading or unloading action is completed, the external power mechanism drives the throttling plate to radially move outwards through the four-jaw chuck to gradually and slowly loosen the throttling ring, the floating body locked by the throttling ring is slowly released to a free state, and meanwhile, the gap between the floating body and the throttling plate is still within a certain range, so that the loaded or unloaded load is gently applied to the balance through the loading suspender, and the suspender swaying caused in the load releasing process is restrained.
Preferably, in the process of calibrating and resetting the balance, the throttling ring is firstly locked again under the action of an external power mechanism, then the throttling ring is slowly loosened, and the swinging and the swaying of the boom are restrained by adjusting and controlling the loosening speed of the throttling ring.
Preferably, the method further comprises:
in the process of assembling the damping device, engine oil is injected into the oil cylinder, and meanwhile, the liquid level of the engine oil is ensured to be higher than the floating piece and lower than the position of the transmission rod;
the damping device is arranged on the lower surface of the bottom tray of the support frame of the automatic balance loading device, and the connecting rod is fixedly connected with the suspender of the automatic balance loading device with a net weight, so that the floating piece is freely suspended between the upper cavity and the lower cavity of the oil cylinder.
The invention at least comprises the following beneficial effects: the invention has the main technical advantages that the change from the original passive damping device to the existing active damping device is realized by controlling the locking and releasing of the throttling ring and combining the hydraulic principle and the throttling principle, and the invention specifically comprises the following steps:
firstly, the invention uses the hydraulic principle to lock the floating body through the throttling ring, the instantaneous load received when the balance is loaded mainly acts on the damping device, the load is released gradually by controlling the slow opening of the throttling ring, the instantaneous maximum load impact received by the balance is effectively reduced, the balance is effectively protected in the calibration process, part of the loading working conditions which need to be gradually increased or gradually decreased trend can be maintained, the load maintaining function is realized, and meanwhile, compared with the existing clamping device, the clamping device uses the hydraulic principle, the process of converting the output power of a motor into clamping force and then into friction force to maintain the load of the suspender and the weight is avoided, so the clamping device has more advantages in the aspect of maintaining huge load compared with the prior art.
Secondly, the invention utilizes the throttling principle, and effectively suppresses the up-and-down floating of the suspender and the weight caused by load change by controlling the opening degree (such as a half-opening state) of the throttling ring, thereby reducing the up-and-down shaking of the device and improving the loading efficiency of the device.
Thirdly, the motor is used for driving the throttling ring to perform swing inhibition, the original damping mode by means of oil viscous resistance is changed into active mechanical inhibition, the time required for weight stabilization is shortened, and the loading efficiency of the device is improved.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic cross-sectional view of a damping device of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1 and is a schematic view showing the structure of the choke ring when the choke ring is fully unlocked;
FIG. 3 is a schematic view of the installation of the damping device of the present invention;
FIG. 4 is a schematic view showing a state in which a throttle ring is fully opened in a damping device according to the present invention;
FIG. 5 is a schematic diagram of a prior art automatic calibration system for a dry weight balance;
FIG. 6 is a schematic view of an installation of a prior art damping device;
the hydraulic damping device comprises an oil cylinder-1, a floating body-2, a throttling ring-3, a connecting claw-4, a four-claw chuck-5, a connecting rod-6, a cover plate-7, a transmission rod-8, a motor-9, a suspender-10, a weight-11, a supporting frame-12, a driver-13, a damping oil groove-14 and a damping sheet-15.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
It should be noted that, in the description of the present invention, the orientation or positional relationship indicated by the term is based on the orientation or positional relationship shown in the drawings, which are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "engaged/connected," "connected," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, may be a detachable connection, or may be an integral connection, may be a mechanical connection, may be an electrical connection, may be a direct connection, may be an indirect connection via an intermediary, may be a communication between two elements, and for one of ordinary skill in the art, the specific meaning of the terms in this disclosure may be understood in a specific case.
The invention provides a device with an active damping function, which aims at the problems encountered in the use process of the original device, and has the structure shown in figures 1-2, and comprises an oil cylinder 1, a floating body 2, a throttling ring 3, a connecting claw 4, a four-claw chuck 5, a connecting rod 6, a cover plate 7 and a transmission rod 8, wherein the oil cylinder is filled with engine oil in the actual application process, the liquid level of the engine oil is higher than the floating body and lower than the transmission rod, and the device with the active damping function mainly has the load holding function and the weight swing inhibiting function in the loading process.
Specifically, the cylinder is of a cylindrical structure with an opening at the upper side, an upper cavity and a lower cavity are arranged in the cylinder, a platform is arranged between the upper cavity and the lower cavity, and the diameter of the lower cavity is smaller than that of the upper cavity.
The floating body is a cylindrical structure with round weight-reducing grooves at the upper and lower parts, is fixedly connected with the connecting rod, and is freely suspended between the upper cavity and the lower cavity of the oil cylinder after being fixedly connected with the suspender of the automatic loading device through the connecting rod.
The throttle ring is formed by combining four throttle plates with the same 1/4 annular structure, and is positioned around the outer surface of the cylinder of the floating body, the lower surface of the throttle ring is attached to the surface of a platform between the upper cavity and the lower cavity of the oil cylinder, and the upper surfaces of the four throttle plates are fixedly connected with four connecting claws of the four-claw chuck respectively.
The four-jaw chuck is a market goods shelf product, is inversely and fixedly arranged on the lower surface of the cover plate, and is respectively and fixedly connected with the four throttling sheets through four connecting jaws.
The cover plate is fixedly connected with the oil cylinder through a flange and is provided with a threaded hole connected with the supporting frame.
In practical application, as shown in fig. 3, the damping device of the invention is arranged on the lower surface of the bottom tray of the supporting frame of the automatic calibration system of the heavy balance, is connected with the motor 9 with a speed reducer through a transmission rod, and is fixedly connected with the suspender of the loading device through a connecting rod.
The device has three main functions:
1. when the throttle ring is closed, the instantaneous movement of the floating body up and down is limited based on the hydraulic principle, so that the load holding function is realized;
2. when the throttling ring is semi-closed, based on the small-clearance throttling principle, the up-and-down vibration of the floating body can be rapidly eliminated, and a damping effect is achieved;
3. when the throttle ring is closed and then slowly released, the swing of the floating body can be restrained.
Specifically, the main working method of the damping device comprises the following steps:
before the weight is controlled by the driver to carry out loading or unloading operation, when the motor drives the four-grab chuck to drive the throttling ring formed by the throttling plates to be closed to a locking position, the throttling ring seals an annular gap between the lower cavity of the oil cylinder and the floating body, and at the moment, the lower cavity of the oil cylinder is in a sealing state (shown in figures 1 and 2). Based on the hydraulic principle, relative motion cannot be generated between the floating body and the oil cylinder, the load loaded and unloaded by the weight is born by the support frame of the fixed damping device, the load born by the balance is still kept to be the last loading working condition, and the damping device realizes the load holding function of the loading device.
After the weight loading or unloading action is finished, the throttling plate is driven to radially move outwards through the four-jaw chuck, the throttling ring is gradually and slowly released, the floating body locked by the throttling ring is slowly released to a free state, in the process, the gap between the floating body and the throttling plate is still in a certain range, based on the throttling principle, the load of loading/unloading is gently applied to the balance through the loading suspender, and meanwhile the suspender shaking caused in the load releasing process can be effectively restrained.
When the throttling ring is gradually opened to a semi-closed state until the throttling ring is in a fully opened state (as shown in fig. 4), the throttling effect of the throttling ring gradually disappears, the floating body is in a free suspension state, and the damping device cannot influence the loading load of the balance. The horizontal swing or up-down swing of the suspender and the floating body can be caused in the calibration and reset process of the balance, the motor throttling ring can be controlled to be locked again, then the throttling ring is slowly loosened, and the effect of inhibiting the suspender from swinging and swinging can be effectively achieved by adjusting the speed of controlling the loosening of the throttling ring.
The above is merely illustrative of a preferred embodiment, but is not limited thereto. In practicing the present invention, appropriate substitutions and/or modifications may be made according to the needs of the user.
The number of equipment and the scale of processing described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be readily apparent to those skilled in the art.
Although embodiments of the invention have been disclosed above, they are not limited to the use listed in the specification and embodiments. It can be applied to various fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. Therefore, the invention is not to be limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (4)
1. The damping method for weight loading is characterized in that the damping method is completed based on a damping device, and the damping device comprises an oil cylinder, a floating body, a throttling ring with a connecting rod, a four-jaw chuck and a transmission rod;
before the balance automatic loading device loads or unloads the weight through the driver control operation, when the external power mechanism drives the four-grab chuck to drive the throttling ring formed by the throttling sheets to be closed to the locking position, the throttling ring seals the annular gap between the lower cavity of the oil cylinder and the floating body, so that the lower cavity of the oil cylinder is in a sealing state, relative motion cannot be generated between the floating body and the oil cylinder, the load loaded and unloaded by the weight is born by the support frame of the fixed damping device, the load born by the balance still keeps the last loading working condition, and the function of keeping the load is completed.
2. The damping method for weight loading according to claim 1, wherein after the weight loading or unloading is completed, the external power mechanism drives the throttle plate to move radially outwards through the four-jaw chuck, the throttle ring is gradually and slowly released, the floating body locked by the throttle ring is slowly released to a free state, and meanwhile, the gap between the floating body and the throttle plate is still within a certain range, so that the loaded or unloaded load is smoothly applied to the balance through the loading boom, and the up-and-down shaking of the boom caused in the load releasing process is restrained.
3. The damping method for weight loading according to claim 1, wherein during calibration and reset of the balance, the throttle ring is locked again by the action of the external power mechanism, and then the throttle ring is released slowly, and the swing and the shake of the boom are suppressed by adjusting and controlling the speed at which the throttle ring is released.
4. The damping method for weight loading of claim 1, further comprising:
in the process of assembling the damping device, engine oil is injected into the oil cylinder, and meanwhile, the liquid level of the engine oil is ensured to be higher than the floating piece and lower than the position of the transmission rod;
the damping device is arranged on the lower surface of the bottom tray of the support frame of the automatic balance loading device, and the connecting rod is fixedly connected with the suspender of the automatic balance loading device with a net weight, so that the floating piece is freely suspended between the upper cavity and the lower cavity of the oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202410254927.1A CN117824812B (en) | 2024-03-06 | 2024-03-06 | Damping method for weight loading |
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| CN202410254927.1A CN117824812B (en) | 2024-03-06 | 2024-03-06 | Damping method for weight loading |
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| CN117824812B CN117824812B (en) | 2024-05-07 |
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