RU148753U1 - TAPE FLYWHEEL - Google Patents

Abstract

The device allows to increase the reliability of fastening and improve centering. The specified technical result is achieved in that the device comprises a tape, an elastic center, an adhesive layer located between the turns of the tape. The width of the tape of the last turn is chosen smaller than the width of the rest of the tape, and the end of the last turn of the tape is made smoothly narrowed both in width and in thickness. The end part of the end of the last turn of the tape is made with two transverse branches located symmetrically, mounted in slots, made in the previous constant width of the turn, and fastened with a continuous adhesive layer. 3 s.p. f-ly, 2 Fig.

Description

Technical field

The tape flywheel belongs to the field of mechanical engineering and can be used in various industries, in particular, in the energy sector.

State of the art

Known flywheel, wound from a high strength tape with gluing coils on the center, made elastically pliable. (SU, No. 200335, F16F 15/30, publ. 05.16.1966).

In this technical solution, the external last turn of the winding is connected to the previous gluing or in another way that does not violate the strength of the tape. In addition, the last turn of the tape is made with a hole, for example, weakened, so that if the speed of the flywheel is exceeded, only the last turn is torn, and the penultimate one is pressed against the inner cylindrical surface of the flywheel housing and friction slows down its speed. The rotation of the flywheel is carried out in the direction of winding the tape.

However, this analogue has the disadvantage that the loose (simply glued) end of the tape is easily torn off from the rest of the winding, since the adhesive weakly resists tearing off the glued edge of the last turn.

Known tape flywheel containing a tape, the elastic center on which the tape is wound, an adhesive layer located between the turns of the tape, the width of the tape of the last turn being chosen smaller than the width of the rest of the tape, and the end of the tape of the last turn is placed inside the previous constant width of the turn with its gluing continuous adhesive layer between the said turns. (SU, No. 353086, F16F 15/30, publ. 11/23/1970).

In this device, the last turn of the tape is made sharply converging into an inclined zigzag strip, 10% wide of the width of the tape of other turns. The last turn of the tape is wound in the opposite direction, which is mounted on the glue inside the previous turn. In this case, the adhesive layer does not work on separation, but on shear, so the bond strength of the last turn is much higher.

However, such a device has several limitations:

- a sharp transition from the full width of the tape to a narrow strip reduces the strength of the tape;

- the width of the strip, which is exactly 10% of the total width of the tape, can only be used in a particular case of the ratio of the width of the tape and the diameter of the flywheel;

- the length of the narrow zigzag inclined strip is about ten circumference of the flywheel, which leads to an overexpenditure of the material of the tape and to the appearance on the long length of the errors in the width of the strip, which weakens the structural strength;

- the end of the strip entering between the last two turns of the equal-thickness tape, the penultimate one and a number of strips in the last turn is made of the same thickness as the main tape, and this increases the force of separation of this end from the winding and worsens the overall alignment of the flywheel, while the adhesive resistance to peeling is significantly less than shear, and this reduces the strength of the structure.

The closest is a tape flywheel containing a tape, an elastic center on which the tape is wound, an adhesive layer located between the turns of the tape, the width of the tape of the last turn being chosen smaller than the width of the rest of the tape, and the end of the last turn of the tape made smoothly narrowed as in width, and in thickness, and the end part of the end of the last turn of the tape is made with a transverse branch, the tape of the previous constant width of the turn is provided with a slot, and the transverse branch is mounted inside the gap, with its gluing and gluing Latter loop ribbons with ribbon coil of constant width preceding continuous adhesive layer. (RU, No.132849, U1, F16F 15/30, publ. 09/27/2013).

However, this device has limitations in terms of the weak bearing capacity of the tapered end of the last turn of the tape having a maximum peripheral speed, as well as the violation of the dynamic balancing of the tape flywheel associated with the axial asymmetry of the last turn of the tape with one transverse branch. These shortcomings were found during overclocking tests of this device.

Utility Model Disclosure

The task solved by the utility model is the improvement of technical and operational characteristics.

The technical result that was obtained by the implementation of the claimed device is to increase the reliability of fastening, as well as improving centering (reducing dynamic imbalance).

To solve the problem with the achievement of the specified technical result in the known tape flywheel containing the tape, the elastic center on which the tape is wound, an adhesive layer located between the turns of the tape, the tape width of the last turn being chosen smaller than the width of the remaining tape, and the end of the last turn the tape is made smoothly narrowed both in width and in thickness, and the end part of the end of the last turn of the tape is made with a transverse branch, the tape of the previous constant width of the turn is provided with a slit, and across the first branch is mounted inside the slot, with its gluing and gluing of the last turn of the tape with the tape of the previous constant width of the turn with a continuous adhesive layer, according to the claimed utility model, the end part of the end of the last turn of the tape is equipped with a second transverse branch located symmetrically to the first transverse branch relative to the longitudinal axis of the tape, the tape of the previous constant width of the turn is provided with a second slot, and the second transverse branch is mounted inside the second slot with its gluing.

Additional embodiments of the device are possible, in which it is advisable that:

- the first and second transverse branches were made at an angle to the longitudinal axis of the tape;

- the first and second transverse branches were smoothly mated with the end part of the end of the last turn of the tape and smoothly mated with each other;

- the slots were located along and symmetrically with respect to the longitudinal axis of the tape.

The indicated advantages of the utility model, as well as its technical features are explained with the help of a variant of its implementation with reference to the accompanying drawings.

Those skilled in the art will appreciate that other technical improvements are possible in addition to the scope of patent protection of the device, as reflected in the independent claim.

Brief Description of the Drawings

In FIG. 1 shows a view of the last turn of the tape with two symmetrical branches;

In FIG. 2 is a longitudinal section through a belt flywheel along line Α-A in FIG. one.

Utility Model Embodiment

The tape flywheel (Fig. 1, 2) contains the tape 1, the elastic center 2, on which the tape 1 is wound, an adhesive layer 3 located between the turns of tape 1. The width of the tape 1 of the last turn 4 is chosen smaller than the width of the rest of the tape 1. The end of the last turn 4 of the tape 1 is made smoothly narrowed both in width and in thickness. The end part of the end of the last turn 4 of the tape 1 is made with a transverse branch 5. The tape 1 of the previous constant width of the turn is provided with a slit 6. The cross branch 5 is mounted inside the slit 6, with its gluing and gluing the last turn 4 of the tape 1 with the tape 1 of the previous constant width of the turn continuous adhesive layer 3.

The end part of the end of the last turn 4 of the tape 1 is provided with a second transverse branch 7, located relative to the longitudinal axis of the tape 1 symmetrically to the first transverse branch 5. The tape 1 of the previous constant width of the turn is provided with a second slot 8, and the second transverse branch 7 is mounted inside the second slot 8 with its gluing together.

To further improve the quality of fastening, the first and second transverse branches 5, 7 can be made at an angle to the longitudinal axis of the tape 1 (Fig. 1).

To further improve tensile strength, the first and second transverse branches 5, 7 smoothly interfaced with the end part of the end of the last turn 4 of the tape 1 and smoothly interfaced with each other.

To increase the strength and reliability of the fastening slots 6 and 8 are located along and symmetrically with respect to the longitudinal axis of the tape 1.

The figure 2 shows one of the possible options for a utility model corresponding to the technical solution according to patent RU, No. 132849.

The adhesive layer 3 can be made continuous (Fig. 2), mainly for the last turn 4 of the tape 1 and the previous one, as well as for the internal turns located near the elastic center 2.

An intermittent adhesive layer 3 can be applied to the strips 6 introduced into the device, periodically located under the aforementioned constant width of the coil and glued to the surfaces of adjacent coils (Fig. 2).

In this embodiment, the thickness of the tape 1 of the turn between the strips 6 is selected greater than the thickness of the tape 1 of the remaining turns, and the strips 9 are made of different thicknesses with the possibility of ensuring an equal stress state of adjacent turns (very close to equal stress). In FIG. 2 shows the different thickness strips 9 corresponding to this case, providing a general “symmetry” of the structure, i.e. if there is a coil with a greater thickness of the tape 1 inside the device, the arrangement of the outer turns is achieved at an equidistant distance from the axis of the elastic center 2.

In particular cases of the utility model, the tape 1 and the adhesive layer 3 can be made with variable thicknesses, which are selected corresponding to the equal-stress state of adjacent turns, and the tape 1 can be made with a variable thickness, and the adhesive layer 3 can be made of materials with different modules elasticity to ensure the equal stress state of adjacent turns.

In addition, for ease of assembly and reliability of fastening, the tape 1 may consist of fragments (individual pieces) along its length.

The tape 1 of constant width is wound around the elastic center 2 (Fig. 2), and also the penultimate turn is glued with the outer turn with a continuous adhesive layer 3. Moreover, the tape 1 at the beginning of winding onto the elastic center 2 can be made with a gradually decreasing thickness to the elastic center 2, such a “sharpening” is indicated at 10 in FIG. 2.

The tape flywheel operates (Fig. 1, 2) as follows.

In a rotating flywheel composed of separate turns, the tension in the turns increases from the elastic center 2 to the periphery of the flywheel. When the coils are connected by a continuous adhesive layer 3, the stress state of the tape 1 changes — the inner layers increase and the outer layers decrease. This change is the stronger, the thinner the adhesive layer 3 and the higher the elastic modulus of the adhesive material. In particular, by selecting the mentioned parameters, it is possible to achieve an equally stressed state of adjacent turns of tape 1 glued by a continuous adhesive layer 3, which is important for the efficiency of the flywheel. The outer layers of the winding can be glued by means of inner strips 9, which further weaken the effect of gluing on the stress state of the tape 1, which is greatest in the outer coils. This is necessary so that when the permissible speed of the flywheel is exceeded, it is the last turn (s) of the tape that is broken and the flywheel brakes by friction against the inner surface of the housing, making such a gap safe. Of course, the rotation of the flywheel is made in the direction of winding the tape. The tape 1 of the previous constant turn width relative to the last outer turn 4 is provided with two slots 6 and 8, and the first and second transverse branches 5, 7 are mounted inside these slots 6 and 8. This ensures the fastening of the last turn 4 of the tape 1 and eliminates dynamic unbalance devices, as confirmed by the experiment. Since the adhesive layer 3 of at least one inner coil located under the aforementioned previous constant width of the coil is intermittent or in the form of strips 9, a guaranteed separation of the external turns is made when the flywheel rotational speed is higher than the operational one (specified by technical conditions). To further improve the tensile strength at a flywheel speed close to operational, the first and second transverse branches 5, 7 can be made at an angle to the longitudinal axis of the tape 1, smoothly interfaced with the end of the last turn 4 of the tape 1 and smoothly interfaced with each other (Fig. 1 ), and outside this element of the device has the appearance of a dovetail.

Specialists understand that the proposed tape flywheel can be used in various designs of tape flywheels and is not limited to the specific device described above.

Industrial applicability

The most successfully declared tape flywheel is industrially applicable in the energy sector and in various branches of mechanical engineering.

Claims (4)

1. The tape flywheel containing the tape, the elastic center on which the tape is wound, an adhesive layer located between the turns of the tape, the width of the tape of the last turn being chosen smaller than the width of the rest of the tape, and the end of the last turn of the tape made smoothly narrowed both in width and and in thickness, and the end part of the end of the last turn of the tape is made with a transverse branch, the tape of the previous constant width of the turn is provided with a slit, and the transverse branch is mounted inside the slot, with its gluing and gluing of the last turn of the tape with of the previous constant width of the coil with a continuous adhesive layer, characterized in that the end part of the end of the last turn of the tape is provided with a second transverse branch located symmetrically to the first transverse branch relative to the longitudinal axis of the tape, the tape of the previous constant width of the turn is provided with a second slot, and the second transverse branch is mounted inside second gap with its gluing. 2. The tape flywheel according to claim 1, characterized in that the first and second transverse branches are made at an angle to the longitudinal axis of the tape. 3. The tape flywheel according to claim 1, characterized in that the first and second transverse branches are smoothly coupled to the end of the last turn of the tape and smoothly coupled to each other. 4. The tape flywheel according to claim 1, characterized in that the slots are located along and symmetrically with respect to the longitudinal axis of the tape.

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