CN101152942A - elevator equipment - Google Patents

Abstract

Provided is an elevator apparatus in which vibration of an elevator car is suppressed. In the elevator equipment of the present invention, in the hoistway, the elevator car (1) suspended by the sling (5) and the counterweight (12) are driven by the elongated winch (10), wherein the elevator car (1) and the counterweight (12) are suspended in a winding mode of n:1 (n is a natural number above 3), and the elevator equipment further has a suspension that is arranged on the elevator car (1) and the counterweight (12). Hanging pulley, arranged in the hoisting channel, used to change the diverting pulley of the direction of the sling, arranged on the elongated hoist (10), on which the driving sheave ( 11), wherein, between the drive sheave (11) and the suspension pulley of the elevator car (1), at least one of the deflection pulleys of the deflection pulleys on which the sling (5) is wound The diameter is different from that of the drive sheave (11).

Description

elevator equipment

technical field

The invention relates to an elevator installation in which an elevator car and a counterweight move along guide rails in a hoistway.

Background technique

Elevator installations are known in which the elevator car and the counterweight are suspended in a 3:1 winding system or a 4:1 winding system. For example, in the scheme proposed in Japanese Patent Laid-Open No. 2005-200205 of Patent Document 1, the driving sheave, the suspension pulley and the diverting pulley are combined by pulleys of various sizes.

Patent Document 1: Japanese Patent Application Laid-Open No. 2005-200205 (Figures 1 to 13)

Generally, the natural vibration frequency of the rope wound around the suspension pulley of the elevator car changes according to the length of the rope (the position of the elevator car), and is smallest when the elevator car is located on the lowest floor. Here, the minimum value of the natural vibration frequency of the cable decreases with increasing cable travel. That is to say, compared with the elevator equipment installed in a high-rise building, the minimum value of the natural vibration frequency of the sling of the elevator equipment installed in a standard height building is greater, so the natural vibration frequency is different from that due to the drive rope There is little possibility that the vibration frequency due to slight eccentricity of the wheel will match.

However, as in the elevator equipment described in Patent Document 1, when a 3:1 winding system or a 4:1 winding system is adopted, compared with the case of adopting a 2:1 winding system, the hoisting machine The rotational speed of the driving sheave is large, so the frequency of the vibration occurring on the driving sheave is also large. Therefore, even if it is an elevator installed in a building with a standard height, the vibration frequency of the driving sheave may exceed the minimum value of the natural vibration frequency of the sling. In this case, the vibration frequency of the driving sheave will Resonates in accordance with the natural vibration frequency of the sling.

In addition, in the elevator equipment described in the above-mentioned Patent Document 1, the rope is directly wound from the driving sheave to the suspension sheave of the elevator car without passing through other deflection pulleys, so the vibration of the driving sheave is directly transmitted. to the sling wrapped around the suspension pulley of the elevator car. Therefore, if the vibration frequency of the drive sheave is consistent with the natural frequency of the sling wound on the elevator car suspension pulley, it will inevitably resonate with the suspension rope wound on the elevator car suspension pulley, and Causes greater vibration to be transmitted to the elevator car.

Contents of the invention

An object of the present invention is to provide an elevator installation in which vibration of an elevator car is suppressed.

In order to achieve the above object, in the elevator equipment of the present invention, in the hoistway, the elevator car and the counterweight suspended by the sling are driven by the winch, wherein the elevator car and the counterweight are driven by the sling with n : 1 (n is a natural number above 3) winding mode suspension, the elevator equipment further has: a suspension pulley arranged on the elevator car and the counterweight; arranged in the elevator passage for changing The diverting pulley in the direction of the sling; it is arranged on the hoist, on which the driving sheave of the sling is wound, and between the driving sheave and the suspension pulley of the elevator car, the winding At least one of the deflection pulleys around the sling has a different diameter than the drive sheave.

Invention effect

According to the present invention, it is possible to provide an elevator installation in which vibration of an elevator car is suppressed.

Description of drawings

Fig. 1 is a perspective view showing elevator equipment according to a first embodiment of the present invention.

Fig. 2 is a diagram showing a rope winding method in the elevator equipment according to the first embodiment of the present invention.

Fig. 3 is a perspective view showing an elevator installation according to a second embodiment of the present invention.

Fig. 4 is a diagram showing a rope winding method in an elevator apparatus according to a second embodiment of the present invention.

Symbol Description

1 elevator car

2 Elevator entrance and exit

3 Upper frame of elevator car

4, 15 Sling fixing parts

5 slings

6 Lower pulley of elevator car

7a, 7b Elevator car side diverting pulley

8 Elevator car suspension pulley

9a, 9b, 9c Hoist side steering pulley

10 Longitudinal winches

11 Driving sheave

12 counterweight

13 Balance weight suspension pulley

14 Steering pulley on counterweight side

Detailed ways

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a perspective view showing an elevator apparatus according to a first embodiment of the present invention, and Fig. 2 is a diagram showing a winding method of a rope 5 in Fig. 1 .

The elevator system of the present embodiment is configured such that the elevator car 1 moves up and down along the elevator car guide rails 16a, 16b, and the counterweight 12 moves up and down along the counterweight guide rails 17a, 17b. The elevator car 1 and the counterweight 12 are suspended by slings 5 and driven by a lengthwise hoist 10 having a drive sheave 11 . Here, the "longitudinal hoisting machine" refers to a hoisting machine in which the dimension in the direction of the rotation axis is larger than the dimension in the direction perpendicular to the direction of the rotation axis.

And, the elevator hall side of the elevator car 1 is provided with an elevator entrance and exit 2, and an elevator car upper frame 3 is arranged on the ceiling part. Carriage suspension pulley 8. In addition, an elevator car lower pulley 6 is provided near the elevator car floor on the right side of the elevator car 1, and a sling fixing member 4 is provided below the center of the elevator car floor. Here, the right side of the elevator car 1 refers to a part located on the right side of the elevator car 1 when viewed from the elevator hall side. In addition, the top of the balance weight 12 is also equipped with a sling fixture 15 and a balance weight suspension pulley 13 . And, the sling fixing parts 4 and 15 have the function of absorbing the elongated portion of the sling 5 .

On the upper part of the hoistway, the elevator car side diverting pulleys 7a and 7b and the hoisting machine side diverting pulley 9a which are substantially parallel to each other in vertical projection are arranged. And on the top of the hoistway, there is provided with the hoist side diverting pulley 9b which is inclined to the vertical projection of the elevator car side diverting pulleys 7a and 7b, and the vertical projection of the above-mentioned elevator car side diverting pulley 7a etc. is approximately The upper vertically arranged counterweight side steering pulley 14.

And, in this embodiment, the suspension pulley, diverting pulley, rope pulley and pulley are collectively referred to as a pulley, and the pulley installed on the top or side of the elevator car 1 or counterweight 12 is referred to as a suspension pulley. The pulley in the hoistway is called a diverting pulley, the drive pulley is called a rope pulley, and the pulleys other than the suspension pulley installed on the elevator car 1 or the counterweight 12 are called pulleys. In addition, the hoist side diverting pulley refers to a pulley for winding the rope 5 extending from the elevator car suspension pulley 8 or the counterweight suspension pulley 13 to the drive sheave 11 of the longitudinal hoist 10, and the elevator car side The diverting pulley refers to the diverting pulley located on the opposite side of the driving sheave 11 based on the elevator car suspension pulley 8, and the diverting pulley on the counterweight side refers to the diverting pulley located on the opposite side of the driving sheave 11 based on the counterweight suspension pulley 13 pulley.

Next, the winding method of the rope 5 in the elevator apparatus of this embodiment is demonstrated. Basically, in the elevator equipment of this embodiment, the elevator car 1 and the counterweight 12 are suspended using the sling fixing members 4, 15, the elevator car suspension pulley 8, and the counterweight suspension pulley 13, and the winding method A 3:1 winding method was used. Specifically, as shown in Figure 1, at first, one end of the sling 5 is fixed on the sling fixing member 4 adjacent to the floor of the elevator car 1, and extends substantially horizontally from the sling fixing member 4 to reach the elevator car. The pulley at the bottom of the car extends upwards after turning at the pulley 6 at the bottom of the elevator car. Then, it extends substantially horizontally from the car-side diverting pulley 7a to reach the other car-side diverting pulley 7b, and extends downward after being diverted by the car-side diverting pulley 7b. Then, the sling 5 passes through the elevator car suspension pulley 8 on the upper part of the elevator car 1 and extends upwards after being turned, is wound on the hoist side diverting pulley 9a and turns downwards, and then winds to the other hoisting machine side to turn. On the pulley 9b, turn around and extend upward again, and then wind around the drive sheave 11 of the elongated hoist 10, turn around and extend downward. Afterwards, the sling 5 further extends upwards after being turned by the counterweight suspension pulley 13 on the top of the counterweight 12 , and extends downwards after being turned by the counterweight side turning pulley 14 , and then reaches the sling fixing piece on the top of the counterweight 12 15, and one end of the sling 5 is fixed on the sling fixing part 15.

According to the above-mentioned present embodiment, since the winding method of 3:1 is adopted, the vertical load is distributed to the three slings, so the vertical load acting on the deflection pulley can be reduced, and the vertical load with a small moment can be selected. Type hoist 10. That is, since the strength members of the elevator equipment and the vertically long hoisting machine 10 can be downsized, it is possible to reduce manufacturing costs and save space.

In addition, by setting the hoist side diverting pulleys 9a, 9b, it is more convenient to change the plane layout position of the elevator car 1, the counterweight 12 and the vertical hoist 10, so by rationally making the plane in the hoistway Arrangement can save space. In addition, by adjusting the arrangement position of the hoisting machine deflection pulley 9b close to the drive sheave 11, the winding angle of the suspension rope 5 around the drive sheave 11 can also be appropriately changed.

And, in the above-mentioned winding method, the sling 5 is wound once on the driving sheave 11, and its winding angle is approximately 180°. Compared with the case of making two turns, the load on the shaft of the drive sheave 11 can be reduced. As a result, the vibration of the drive sheave 11 can be reduced, so the vibration transmitted to the elevator car 1 via the rope 5 and the elevator car suspension sheave 8 and the vibration transmitted to the building via the diverting pulley can be reduced.

The size of each pulley is described below. First, the diameters of the lower pulley 6 of the elevator car, the suspension pulley 8 of the elevator car, the diverting pulley 9b on the hoisting machine side, and the diverting pulley 14 on the counterweight side are approximately the same as the diameter of the driving sheave 11, while the diverting pulley 7a and 7b, the hoisting machine side deflection pulley 9a and the diameter of the balance weight suspension pulley 13 are different from the diameters of the driving sheave 11 and the like. Here, substantially the same diameter is not limited to the same diameter in the strict sense, and may include diameters within a design error range, and different diameters refer to diameters that are, for example, 1.2 to 1.3 times the diameter of the driving sheave or the like. Here, a pulley with a diameter smaller than that of the drive sheave 11 is not used, the purpose of which is to improve the service life of the sling 5 as much as possible. In addition, the reason for using the drive sheave 11 with a small diameter is that an increase in the diameter of the drive sheave 11 leads to an increase in the size of the hoisting machine, resulting in an increase in manufacturing cost. In addition, as a pulley with a diameter larger than that of the driving sheave 11, various kinds of pulleys can be used, but in consideration of the convenience of manufacture, it is preferable to combine all the pulleys including the driving sheave 11 into pulleys of two types of diameters. , a kind of is the pulley that diameter is approximately identical with drive sheave 11 diameters, and another kind is the pulley that diameter is greater than drive sheave 11 diameters.

Next, the relationship between the ascending and descending speed of the elevator car 1 and the peripheral speed of each pulley will be described. Here, if there is no slippage between each pulley and the sling 5, then the peripheral speed of each pulley should be consistent with the speed of the sling 5 on each pulley, but in practice, due to the possibility of slight slipping , so strictly speaking the speed between the two is not the same. Therefore, in this embodiment, substantially the same peripheral speed in which the difference in peripheral speed is caused by the slipping of the wire rope 5 and within a relatively slight range is referred to as substantially the same peripheral speed. In this way, the peripheral speed of the lower pulley 6 of the elevator car, the diverting pulleys 7a and 7b on the side of the elevator car, and the diverting pulley 14 on the counterweight side are approximately the same as the lifting speed of the elevator car 1, while the suspension pulley 8 and the balance of the elevator car The peripheral speed of the heavy suspension pulley 13 is roughly twice the lifting speed of the elevator car 1, and the peripheral speed of the driving sheave 11 and the hoist side diverting pulleys 9a and 9b is roughly three times the lifting speed of the elevator car 1.

Furthermore, the rotation speed of each pulley is necessarily determined by the size and peripheral speed of each pulley, and the relationship between the rotation speed of the driving sheave 11 and the rotation speed of other pulleys is as follows. First, among the pulleys whose diameter is approximately the same as that of the driving sheave 11, the rotation speed of the hoist side diverting pulley 9b is approximately twice the rotation speed of the driving sheave 11, and the rotation speed of the elevator car suspension pulley 8 is approximately twice that of the driving sheave. 0.50 times of the rotating speed of 11, the rotating speed of counterweight side diverting pulley 14 and elevator car bottom pulley 6 is roughly 0.33 times of the rotating speed of driving sheave 11. In addition, in terms of pulleys with a diameter greater than the diameter of the driving sheave 11, the rotation speed of the hoist side diverting pulley 9a is 0.70 to 0.83 times the rotation speed of the driving sheave 11, and the rotation speed of the balance weight suspension pulley 13 is 10 times that of the driving sheave 11. 0.38～0.42 times, and the rotating speed of elevator car side diverting pulley 7a and 7b is 0.26～0.28 times of the rotating speed of driving sheave 11.

In this way, when the suspension pulleys, deflection pulleys, rope pulleys and pulleys required for the elevator equipment are divided into two types of pulleys, as mentioned above, if the large pulley is set to 1.2 to 1.3 times the small pulley, then The rotation speed will not be the same between pulleys with different peripheral speeds. And, even if there are a plurality of pulleys with the same peripheral speed (such as the elevator car suspension pulley 8 and the counterweight suspension pulley 13, and the elevator car side diverting pulleys 7a, 7b and the counterweight side diverting pulley 14), as long as By making the diameters of the respective pulleys different, it is possible to avoid the situation where the rotational speeds are the same. In addition, by avoiding the occurrence of the same pulley rotation speed, it is possible to prevent resonance due to eccentricity of the pulleys and the like.

In addition, since the driving sheave 11 is more likely to vibrate than other pulleys, it is important to reduce the number of pulleys whose rotation speed is the same as that of the driving sheave 11 . Therefore, even if there are a plurality of deflection pulleys having the same circumferential speed as the drive sheave 11 like the hoist side deflection pulleys 9a and 9b of this embodiment, at least one of the deflection pulleys has a diameter equal to that of the drive sheave 11. Different diameters can reduce the number of pulleys whose rotational speed is the same as that of the driving sheave 11 , thereby suppressing resonance with the vibration of the driving sheave 11 .

In addition, in the elevator equipment adopting the 3:1 winding system as in this embodiment, since the frequency of the vibration generated by the slight eccentricity of the driving sheave 11 is high, even if it is installed in a building of standard height, the frequency It is also possible to coincide with the natural vibration frequency of the sling 5 wound around the suspension pulley 8 of the elevator car. However, in this embodiment, since the sling 5 extends from the driving sheave 11 to the elevator car suspension pulley 8, a hoist side diverting pulley 9a is provided, and the rotation speed of the hoisting machine side diverting pulley 9a is related to the driving rope. The rotation speed of the wheel 11 is different, so the component of the vibration generated in the drive sheave 11 is changed by the hoist side diverting pulley 9a, therefore, it can be avoided that the natural frequency of the suspension rope 5 coincides with the occurrence of the situation, as a result, can be The suspension rope 5 is prevented from resonating, and large vibrations are suppressed from being transmitted to the elevator car 1 through the elevator car suspension pulley 8 .

In addition, in the above-mentioned embodiment, the elevator equipment adopting the 3:1 winding method has been described as an example, but the present invention can also be applied to the elevator equipment adopting the n:1 (n is a natural number greater than or equal to 3) winding method (for example, 4 : 1 winding method, etc.) in the elevator equipment. For example, in the elevator equipment in which a plurality of suspension pulleys are arranged on the upper part of the elevator car 1 and the counterweight 12, the number of the pulleys is more than that in the elevator equipment adopting the 3:1 winding method. However, as described above, only by reducing the number of pulleys with the same rotational speed in the pulley combination, the resonance phenomenon can be prevented, thereby suppressing the vibration and noise of the elevator car 1 . Furthermore, by preventing the deflection pulley installed in the hoistway from resonating with the vibration of the drive sheave 11, as a result, vibration and noise in the building can also be suppressed. Moreover, by providing a deflection pulley with a diameter different from that of the drive sheave 11 on the way in which the sling 5 extends from the drive sheave 11 to the suspension pulley of the elevator car 1, it is possible to prevent the vibration frequency of the drive sheave 11 from being different from that of the suspension sheave. The natural vibration frequency of 5 is the same.

Fig. 3 is a perspective view showing an elevator apparatus according to a second embodiment of the present invention, and Fig. 4 is a diagram showing a winding method of the rope 5 in Fig. 3 .

The elevator equipment of this embodiment is a so-called back counterweight type elevator in which the counterweight 12 is installed on the side opposite to the elevator entrance 2 . The shaft of the vertical hoist 10 is located in a direction perpendicular to the elevator entrance 2, except that the installation positions of the hoist side diverting pulley 9a and the counterweight side diverting pulley 14 at the upper part of the hoistway are different from those of the first embodiment, a hoist is also added. Side steering pulley 9c. The diameter of the hoist side diverting pulley 9c is larger than the diameter of the drive sheave 11, specifically, its diameter is 1.2 to 1.3 times the diameter of the drive sheave 11.

Thus, in this embodiment, compared with 1st Embodiment, since the hoist side deflection pulley 9c is added, the degree of freedom of change of a planar layout is further improved. In addition, although the addition of the hoist side diverting pulley 9c has resulted in an increase in the total number of pulleys, since the rotational speed of the hoisting machine side diverting pulley 9c is 0.70 to 0.83 times the rotational speed of the drive sheave 11, it is possible to prevent the most vibrated part of each pulley. The vibration of the drive sheave 11 resonates.

Furthermore, in the first and second embodiments described above, there may be three or more pulleys having the same peripheral speed. For example, in the first embodiment, the pulleys with approximately the same rotational speed as the driving sheave 11 include the hoist side deflection pulleys 9a and 9b, plus the driving sheave 11 itself, there are three pulleys with the same rotational speed. In the second embodiment, the pulleys having substantially the same peripheral speed as the driving sheave 11 include the hoist side diverting pulleys 9a, 9b and 9c, plus the driving sheave 11 itself, there are four pulleys with the same rotational speed. However, since in the first embodiment, two of the three pulleys are large pulleys and one is a small pulley, while in the second embodiment, two of the four pulleys are large pulleys and two are small pulleys , the number of large pulleys and small pulleys is similar, so the deviation of the rotational speed can be suppressed. That is to say, by controlling the difference between the large pulley and the small pulley to 0 or 1, even if the types of pulleys are controlled into two types for the convenience of manufacture, the deviation of the rotational speed can be suppressed and the influence of vibration can be reduced.

Claims (10)

1. A kind of elevator equipment, in hoisting passage, be driven by hoisting machine by the elevator car and counterweight that suspension rope is suspended, it is characterized in that, The elevator car and the counterweight are suspended by slings in a winding manner of n:1 (n is a natural number greater than or equal to 3), The elevator equipment has: a suspension pulley arranged on the elevator car and the counterweight; a deflection pulley arranged in the hoistway to change the direction of the sling; a drive sheave around which said sling is wound, Between the drive sheave and the suspension sheave of the elevator car, at least one of the deflection pulleys on which the suspension rope is wound has a different diameter than the drive sheave. 2. A kind of elevator equipment, in the hoisting passage, the elevator car suspended by the sling and the balance weight are driven by the hoist, it is characterized in that, The elevator equipment has: a suspension pulley and a sling fixing part arranged on the elevator car; a suspension pulley and a sling fixing part arranged on the balance weight; a deflection pulley in the direction of the sling; and a driving sheave provided on the hoist, on which the sling is wound in one turn, Between the drive sheave and the suspension sheave of the elevator car, at least one of the deflection pulleys on which the suspension rope is wound has a diameter greater than the diameter of the drive sheave. 3. A kind of elevator equipment, in the lifting passage, the elevator car suspended by the sling and the balance weight are driven by the hoist, it is characterized in that, The elevator equipment has: an elevator car suspension pulley arranged on the upper part of the elevator car; a counterweight suspension pulley arranged on the upper part of the counterweight; a suspension pulley arranged on the elevator car and the counterweight. A cable fixing member; a deflection pulley arranged in the lifting channel to change the direction of the sling; and a driving sheave arranged on the winch, on which the sling is wound in one turn , Between this drive sheave and the suspension sheave of the elevator car, at least one of the hoist-side diverting pulleys on which the suspension rope is wound has a diameter greater than that of the drive sheave, and the elevator The diameters of the car side diverting pulley and the counterweight side diverting pulley are different from each other. 4. A kind of elevator equipment, in the hoisting passage, the elevator car suspended by the sling and the balance weight are driven by the hoist, it is characterized in that, The elevator equipment has: a plurality of elevator car suspension pulleys arranged on the upper part of the elevator car; a plurality of counterweight suspension pulleys arranged on the upper part of the counterweight; arranged in the lifting passage, changing the a deflection pulley in the direction of the sling; a driving sheave on which the sling is wound in one turn, provided on the winch, Between this drive sheave and the suspension sheave of the elevator car, at least one of the hoist-side diverting pulleys on which the suspension rope is wound has a diameter greater than that of the drive sheave, and the elevator The diameters of the car side diverting pulley and the counterweight side diverting pulley are different from each other. 5. Elevator installation as claimed in claim 3 or 4, characterized in that, The rotational speed of the drive sheave is different from the rotational speed of the elevator car-side diverting pulley and the counterweight-side diverting pulley. 6. Elevator installation according to any one of claims 1 to 4, characterized in that The diameter of the suspension pulley of the elevator car is different from the diameter of the suspension pulley of the counterweight. 7. Elevator installation as claimed in claim 6, characterized in that, The speed of the drive sheave is different from the speed of the elevator car suspension pulley and the rotation speed of the counterweight suspension pulley. 8. Elevator installation according to claim 3 or 4, characterized in that The diameters of the winch side diverting pulley, the elevator car side diverting pulley, the balance weight side diverting pulley, the elevator car suspension pulley and the balance weight suspension pulley are approximately the same as the diameter of the driving sheave, or larger than the diameter of the driving sheave. The diameter of the drive sheave described above. 9. Elevator installation according to claim 3 or 4, characterized in that The hoist side diverting pulley, the elevator car side diverting pulley, the balance weight side diverting pulley, the elevator car suspension pulley and the balance weight suspension pulley have two kinds of diameters, one diameter is the same as the diameter of the driving sheave Roughly the same, the other diameter is larger than the diameter of the drive sheave. 10. Elevator installation according to claim 8 or 9, characterized in that The diameter larger than the diameter of the driving sheave is 1.2 to 1.3 times the diameter of the driving sheave.

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