CN108168781A - A kind of embedded slide type rotor dynamic balancing correction auxiliary tools - Google Patents

Abstract

The invention discloses a kind of embedded slide type rotor dynamic balancing correction auxiliary tools.The tool includes two the first scales equipped with same units scale marker, one the second scale and two auxiliary scales, two first scales are hinged with the second scale, first scale and the second scale are internally provided with skateboard component, skateboard component includes slide plate, middle side part is equipped with connecting pole on slide plate, connecting pole upper end stretches out the upside of the first scale and the second scale by opening respectively, the axial middle part of two auxiliary scales is equipped with bar shaped connecting hole, it is respectively hinged in zero graduation position on the connecting pole on the first scale, two auxiliary scale is slidably connected by bar shaped connecting hole and the connecting pole on the second scale.The present invention is logical simple in structure, is easy to use, and the scale marker abrasion that will not be made on blade is used for a long time, and can quickly determine the installation site of dynamic balance weight, substantially shortens the adjustment time of dynamic balance running, the efficiency of dynamic balance running is improved ten times or more.

Description

An auxiliary tool for dynamic balance correction of a built-in slide plate type rotor

technical field

The invention relates to the field of tools, in particular to an auxiliary tool for dynamic balance correction of a built-in slide plate type rotor.

Background technique

A research content of rotor dynamics refers to the operation of determining the position and size of the unbalance (centrifugal force and centrifugal force couple) generated when the rotor rotates and eliminating it. The unbalance will cause the rotor to vibrate laterally and subject the rotor to unnecessary dynamic load, which is not conducive to the normal operation of the rotor. Therefore, most rotors should be dynamically balanced. In machine manufacturing or maintenance, dynamic balance correction becomes a process.

As an important part of the mechanical system, the rotor is often caused by unbalanced vibration, which will lead to equipment vibration, noise and mechanism damage. Especially for flexible rotors rotating at high speeds, mechanical accidents will be more obvious. Faults account for more than 60% of all mechanical faults. With the development of the current precision numerical control machining technology, the dynamic balance problem that seriously affects the machining accuracy of the high-speed rotor in the production process is particularly important. The dynamic balance instrument can effectively guarantee the reliability and safety of equipment operation, and can obtain Good economic and social benefits have great practical significance.

The unbalance generated when the rotor rotates is caused by the fact that the center of mass of each micro-section of the rotor is not strictly on the axis of rotation. The centrifugal force generated by each micro-segment due to the deviation of the center of mass from the axis of rotation is perpendicular to the axis of rotation. Through the combination of forces, the centrifugal force system can be combined into a small number of concentrated forces, and its direction is still perpendicular to the axis. Generally speaking, at least two concentrated forces acting on two cross-sections can represent the original centrifugal force system. If these two concentrated forces just form a force couple, the original unbalance cannot be detected and measured when the rotor is not rotating; when the rotor rotates, the force couple forms lateral interference and causes the vibration of the rotor. The effect of this imbalance can only be detected and measured in the dynamics of rotation, so dynamic balancing is required. In contrast, static balance refers to the balance that can be performed without rotation when the mass of the rotor is so concentrated that it can be regarded as a thin disk perpendicular to the axis of rotation regardless of thickness. The method is to place the rotor horizontally, and the heavy side will hang down under the action of gravity, and try to adjust the position of the center of mass of the rotor so that it is located on the axis of rotation. After measuring the position and size of the unbalance, either remove it directly, or add its corresponding mass in its symmetrical direction to balance its effect, that is, complete the dynamic balance by removing weight or counterweight.

The method of removing weight to complete the dynamic balance generally adopts grinding, drilling or cutting processes, because it will damage the structure and appearance of the rotor, so the method of removing weight is generally not used to adjust the dynamic balance. At present, the most common method of adjusting the dynamic balance is to use Heavy law. Existing dynamic balance correction machines generally determine the size and angle of the unbalance by measuring the size and angle of the vibration generated by the unbalance, and display the size and angle of the unbalance to the tester through software, but due to different rotors The amount of unbalance is basically different, and the difference is very large. Since the dynamic balance blocks used for counterweights need to be mass-produced, they are generally used to produce dynamic balance blocks of one specification at the same position. For example, the dynamic balance blocks used at the front end of a motor rotor are all 10g. Because the mass of the dynamic balance block is too different from the mass required by the counterweight, the counterweight angle displayed by the dynamic balancing machine cannot be used as the installation angle of the dynamic balance block. Generally, the installation position of the dynamic balance block can only be determined through multiple tests. This directly leads to the long time-consuming and low efficiency of the dynamic balance test.

Contents of the invention

The purpose of the present invention is to provide a built-in slide plate type rotor dynamic balance correction auxiliary tool for the deficiencies in the prior art.

In order to achieve the above object, the present invention provides a built-in slide plate type rotor dynamic balance correction auxiliary tool, which includes two first scales, one second scale and two auxiliary scales with the same unit scale marks. The first scale and the second scale are hinged at the zero scale position, the first scale and the second scale are provided with a through hole in the axial middle, the upper side of the through hole is provided with an opening, and a slide plate assembly is arranged in the through hole, The slide plate assembly includes a slide plate slidably connected to the inside of the through hole. A connecting post is provided in the middle of the upper side of the slide plate. A bar-shaped connecting hole is provided in the middle of the ruler axis, which are respectively hinged on the connecting columns on the first scale at the zero scale position, and the two auxiliary rulers are slidingly connected to the connecting columns on the second scale through the bar-shaped connecting holes.

Preferably, the opening is provided with limiting teeth, and the upper side of the sliding plate is provided with an elastic limiting member.

Preferably, the limiting tooth is a triangular limiting tooth.

Preferably, the elastic limiting part includes a connecting nut and a pivot fixed on the upper side of the slide plate, the connecting nut is threadedly connected with a connecting rod, a spring is sleeved on the connecting rod, and two splints are hinged on the pivot , the inner sides of the two splints are connected to the springs, and the lower and outer sides of the two splints are provided with triangular tooth-shaped limiting parts that match the limiting teeth.

Preferably, a limiting protrusion is provided in the middle of the connecting rod, the spring includes two, respectively arranged on the upper and lower sides of the limiting protrusion, and a retaining spring is provided at the upper end of the connecting rod.

Preferably, an elastic knob is provided at the upper end of the connecting column, and the elastic knob includes a connecting portion screwed to the connecting column and a pressing portion arranged outside the connecting portion.

Preferably, a scale mark is respectively provided on both sides of the first scale, the second scale and the auxiliary scale.

Preferably, there are pointers on the upper side of the sliding board, and the pointers include two pointers, which are respectively arranged on both sides of the connecting column.

Beneficial effects: the invention has a simple structure and is easy to use. Long-term use will not cause the scale mark on the ruler to wear out, and the installation position of the dynamic balance block can be quickly determined, the adjustment time of the dynamic balance test is greatly shortened, and the efficiency of the dynamic balance test is improved. More than ten times.

Description of drawings

Fig. 1 is a structural schematic diagram of an auxiliary tool for dynamic balance correction of a built-in skateboard rotor according to an embodiment of the present invention;

Fig. 2 is a rear view structural schematic diagram of a skateboard assembly according to an embodiment of the present invention;

Fig. 3 is a top structural schematic diagram of a slide assembly according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a partial cross-section of an embodiment of the present invention;

Fig. 5 is a schematic cross-sectional structure diagram taken along the line A-A of Fig. 3 .

Detailed ways

The present invention will be further illustrated below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in Figures 1 to 5, the embodiment of the present invention provides a built-in slide plate type rotor dynamic balance correction auxiliary tool, which includes two first scales 1, one second scale 2 and two auxiliary scales 3, the first The first scale 1 has the same structure as the second scale 2 . The first scale 1, the second scale 2 and the two auxiliary scales 3 are all marked with the scale of the same unit. It should be noted that the scales on the first scale 1, the second scale 2 and the auxiliary scale 3 of the embodiment of the present invention The quality is measured in units of length, and the specific length represents how much quality can be changed according to needs, but the first scale 1, the second scale 2 and the auxiliary scale 3 should be consistent. If the length of 1cm represents 1g, then the length of 10cm represents 10g. If the length of 2cm represents 1g, then the length of 10cm represents 5g, and the change can be defined by oneself during use.

The two first scales 1 and the second scale 2 of the embodiment of the present invention are hinged at the end where the zero scale starts, and the distance between the hinged position and the zero scale should be the same, preferably hinged at the zero scale position. A through hole 4 is opened in the axial middle of the first scale 1 and the second scale 2 , an opening 5 is arranged on the upper side of the through hole 4 , and a slide plate assembly is arranged in the through hole 4 . The slide plate assembly includes a slide plate 6 slidingly connected to the inner side of the through hole 4. The upper middle part of the slide plate 6 is provided with a connecting column 7, and the upper end of the connecting column 7 protrudes from the upper side of the first scale 1 and the second scale 2 through the opening 5. The connecting column 7 is preferably provided with an L-shaped step, and the L-shaped step is arranged on the upper side of the opening 5, and the diameter of the upper part is smaller than the diameter of the lower part, so that the auxiliary scale 3 can be avoided from contacting the first scale 1 and the second scale 2 to wear. The axial middle of the two auxiliary rulers 3 is provided with a bar-shaped connection hole 8, and the two auxiliary rulers 3 are respectively hinged on the connecting column 7 on the first scale 1 at the zero scale position. The connecting column 7 on the two scales 2 is slidably connected.

For ease of use, when the slide plate assembly slides to the specified position, the position can be fixed. In the embodiment of the present invention, a limit tooth 9 is also provided at the opening 5. The limit tooth 9 is set as a triangular limit tooth, or it can be set as Stop teeth of other shapes. An elastic limiting part is arranged on the upper side of the slide plate 6 . The elastic limiting part of the embodiment of the present invention includes a connecting nut 10 and a pivot 11 fixed on the upper side of the slide plate 6, the connecting nut 10 is threadedly connected with a connecting rod 12, a spring 13 is sleeved on the connecting rod 12, and the pivot 11 is hinged. There are two splints 14, the inner sides of the two splints 14 are connected to the stressed end 131 of the spring 13, and the two splints 14 are connected to the opening 5, that is, the lower and outer sides of the two splints 14 are provided with triangular teeth that match the opening 5 Limiting part 15. In normal use, the two splints 14 are pushed towards both sides under the action of the spring 13, so that the triangular tooth-shaped stop 15 and the stop tooth 9 are locked together, so that the slide plate assembly cannot slide in the through hole 4. When adjusting the position of the skateboard assembly, pinch the two splints 14 with your hands, overcome the force of the spring 13 to move the splints 14 inward, and make the triangular tooth-shaped stop 15 and the stop tooth 9 disengage, so that the slide assembly can be adjusted at position within the via hole 4. Obviously, the minimum distance that can be adjusted by the slide plate assembly is the distance between two adjacent teeth on the triangular stop teeth, therefore, the distance between two adjacent teeth of the triangular stop teeth can be changed according to actual needs, so as to Get the ideal minimum travel distance.

The middle part of the connecting rod 12 of the embodiment of the present invention is also provided with a limit protrusion 16, and the spring 13 includes two, which are respectively arranged on the upper and lower sides of the limit protrusion 16, and the spring 13 on the lower side passes through the connecting nut 10 and the limit protrusion. 16 carry out up and down position limitation. A jumper 17 is arranged at the upper end of the connecting rod 12, and the upper and lower springs 13 are limited in their upper and lower positions by the stop protrusion 16 and the jumper 17, and other means such as nuts can also be used to limit the position of the upper end of the spring 13.

The two auxiliary rulers 3 of the embodiment of the present invention are slidably connected to the connecting column 7 on the second scale 2 through the strip connecting hole 8. For ease of use, after the position of the auxiliary ruler 3 is selected, the auxiliary ruler 3 is preferably not will slide on the second scale 2. In the embodiment of the invention, an elastic knob 18 is provided at the upper end of the connecting column 7, preferably an internal thread structure is provided at the upper end of the connecting column 7, and the elastic knob 18 includes a connecting portion 181 threadedly connected with the connecting column 7 and a pressure screw arranged on the outside of the connecting portion 181. The tightening part 182, when the elastic knob 18 is tightened, the pressing part 182 and the auxiliary ruler 3 are pressed on the connecting column 7. In order to prevent the elastic knob 18 and the auxiliary ruler 3 from wearing and tearing during the pressing and loosening process, it is also possible to A washer 19 is arranged on the underside of the elastic knob 18, and the washer 19 can adopt a copper washer, a rubber washer or a polytetrafluoro washer or the like.

For ease of use, it is preferable to set a scale mark on both sides of the upper side of the first scale 1, the second scale 2, and the auxiliary scale 3, so that the operator can easily adjust the position no matter on the left or right side of the tool. operate.

In order to facilitate confirmation of the scale indicated by the slider assembly, pointers 20 are also provided on the upper side of the slider.

The principle of the present invention is: the dynamic balance weight is generally installed in the circumferential balance weight installation groove, such as the motor rotor, the circumferential dynamic balance weight installation groove is generally arranged on the side of the rotor body and the cooling fan, and the automobile wheel hub Some of the dynamic balance weights are set on the inner side or both sides of the hub, and the installation position of the dynamic balance weight is also circumferential. When using a dynamic balance testing machine to measure a dynamic balance test, the dynamic balance tester will reflect the size and angle of the unbalanced amount. Assuming that the size of the unbalance is M1, the mass of the dynamic balance is M2, the angle of the unbalance is α, the circumference radius of the installation groove of the rotor dynamic balance is R, and the speed of the dynamic balance test is V, then the mass production of the unbalance is The centrifugal force generated on the mounting groove of the circular dynamic balance weight is:

F＝M1·V ² /R (Formula 1)

The direction of the centrifugal force is the radius direction from the center of the circle to the α angle. According to the principle of vector mechanics, the centrifugal force can be split. The formula is as follows:

F＝F1·sinββ+F2·sinθθ (Formula 2)

In the above formula, β is the angle between F1 and F, and θ is the angle between F2 and F;

Now install the dynamic balance weight in the installation groove of the dynamic balance weight, and use the dynamic balance weight to generate two centrifugal forces when rotating as F1 and F2 in the above formula. The formula of the centrifugal force is:

F1＝x·M2·V ² /R (Formula 3)

F2＝y·M2·V ² /R (Formula 4)

x and y in the above formula represent the number of dynamic balance blocks respectively;

The above formulas 1 to 4 can be deduced:

M1·V ² /R＝x·M2·V ² /R·sinββ+y·M2·V ² /R·sinθθ (Formula 5)

and it can be derived that:

M1＝x·M2·sinββ+y·M2·sinθθ (Formula 6)

It can be seen from Formula 6 that the relationship between the unbalanced quantity and the mass of the added dynamic balance block follows the parallelogram rule as in mechanics, and the present invention is an auxiliary tool for rotor dynamic balance correction based on the parallelogram rule.

Conditions and methods of use of the present invention: for example, the measured unbalance is 8g, the angle is 180°, the mass of the existing dynamic balance block is 10g, when the required minimum unbalance is less than 2g, the internal balance can be used Inserted slide plate rotor dynamic balance correction aid.

There are different adjustment methods for the same unbalanced quantity M1, that is, let x and y take different values respectively, and the values of x and y will affect the size of the β and θ angles. In order to save materials, generally when M1<2·M2, we prefer to set the values of x and y to 1, that is, use two dynamic balance blocks to make up for the unbalance, when M1>2·M2, or need to add dynamic balance When the position of the block has already been installed with a dynamic balance block, increase the value of x or y, that is, increase the number of dynamic balance blocks. It should be noted that this tool can also be used when there are various masses of dynamic balance weights and a single dynamic balance weight cannot be used to eliminate the unbalance, as long as the masses of the added dynamic balance weights are weighed separately, and then the sliding plate The components can be adjusted to the corresponding positions.

When in use, first adjust the slider assembly to the mass position of the dynamic balance weight, that is, 10g, then tighten the elastic knob to fix it, then adjust the two auxiliary rulers 3 to 10g at the position of the slider assembly, and place the first scale 1 and the second The hinge point of scale 2, that is, the zero scale point is placed in the center of the circumference of the dynamic balance block installation groove, the direction of the second scale 2 is the direction of the unbalanced amount, here is 180°, move the slide plate assembly to the scale of the unbalanced amount, Here it is 8g. At this time, the two intersection points of the two first scales 1 and the installation grooves of the dynamic balance weights are the installation positions of the two dynamic balance weights, and the two dynamic balance weights can be installed at these positions respectively.

When performing a dynamic balance test during maintenance work, it is often encountered that a dynamic balance block has been installed at the intersection, so it is necessary to change the value of x or y, and then change the installation angle of the dynamic balance block, that is, change the angle of β or θ, so as to avoid Open the installed dynamic balance weight.

The values of x and y are generally selected within three. When the number of dynamic balance blocks is large and the angle occupied is too large, when adding a dynamic balance block at the indicated position, the correction will not achieve the desired effect. At this time, The position of the dynamic balance block can be fine-tuned based on experience, or a plurality of dynamic balance blocks can be added near the angle of the unbalanced amount to initially reduce the unbalanced amount, and then the present invention can be used to install the rest of the dynamic balance blocks.

In summary, the present invention has a simple structure and is easy to use. Long-term use will not cause the scale marks on the ruler to wear out, and the installation position of the dynamic balance block can be quickly determined, which greatly shortens the adjustment time of the dynamic balance test and reduces the adjustment time of the dynamic balance test. The efficiency is increased by more than ten times.

The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (8)

1. a kind of embedded slide type rotor dynamic balancing correction auxiliary tools, which is characterized in that including being equipped with same units graduated scale Two the first scales, second scale and two auxiliary scales known, two first scale and the second scale are in zero graduation position It puts and is hinged, first scale and the axial middle part of the second scale offer through-hole, are equipped with and are open on the upside of the through-hole, described logical It is provided with skateboard component in hole, the skateboard component includes being slidably connected at the slide plate on the inside of through-hole, middle side part on the slide plate Equipped with connecting pole, the connecting pole upper end stretches out the upside of the first scale and the second scale, two auxiliary by opening respectively The axial middle part of ruler is equipped with bar shaped connecting hole, is respectively hinged in zero graduation position on the connecting pole on the first scale, described two Auxiliary scale is slidably connected by bar shaped connecting hole and the connecting pole on the second scale.

2. embedded slide type rotor dynamic balancing correction auxiliary tools according to claim 1, which is characterized in that the opening Place is equipped with limiting tooth, and elastic spacing component is equipped on the upside of the slide plate.

3. embedded slide type rotor dynamic balancing correction auxiliary tools according to claim 2, which is characterized in that the limiting Tooth is triangle limiting tooth.

4. embedded slide type rotor dynamic balancing correction auxiliary tools according to claim 3, which is characterized in that the elasticity Limiting component includes being fixed on attaching nut and the pivot on the upside of slide plate, and the attaching nut is threaded with connecting rod, the company Sheathed spring on bar is hinged with two clamping plates on the pivot, connect on the inside of two clamping plates with spring, and on the outside of its underpart two equipped with The matched triangle flute profile limiting section of limiting tooth.

5. embedded slide type rotor dynamic balancing correction auxiliary tools according to claim 3, which is characterized in that the connecting rod Middle part is equipped with limit protrusion, and the spring includes two, is separately positioned on the upper and lower sides of the limit protrusion, the small end Equipped with clamp spring.

6. embedded slide type rotor dynamic balancing correction auxiliary tools according to claim 1, which is characterized in that the connection Column upper end is equipped with an elastic knob, and the elastic knob includes the connecting portion being threadedly coupled with connecting pole and is arranged on outside connecting portion The compressed part of side.

7. embedded slide type rotor dynamic balancing correction auxiliary tools according to claim 1, which is characterized in that described first Scale, the second scale be respectively equipped with both sides on auxiliary scale together with scale marker.

8. embedded slide type rotor dynamic balancing correction auxiliary tools according to claim 7, which is characterized in that the slide plate Upside is additionally provided with pointer, and the pointer includes two, is separately positioned on the both sides of connecting pole.