FI91850C - compensation arrangement - Google Patents

Description

91850

KOMPENSAATIOJARJESTELY

The present invention relates to a compensation arrangement in an elevator according to the preamble of claim 1.

In high elevators, compensating hoists, slots or chains are needed to compensate for the unbalance moment caused by the hoist hoists when the car moves. If this were not done, the size of the 10 motors would have to be considerably larger and the phenomenon would worsen as the height increased. If the height in the shaft becomes large enough without koi compensation, a situation arises where there is insufficient friction. In these, the compensation vessel is fixed to the bottom of the shaft by means of a fixed wheel.

15

There are two different types of koys compensations. In the first type, a drive, belt or chain can be used, and these can be lined with rubber or plastic, and often additional masses have often been added. These ropes, belts or chains are arranged in 20 loops between the body and the counterweight below them, so that they are preferably attached to the lower part of the body and the counterweight. The range of use of this coil compensation is limited to relatively low speeds due to the risk of oscillation. At the bending point of the loop, the speed of the rope, vydn or chain is the same as the speed of the? 5 elevator. This speed at the bending point of the run is called the run speed. If you now change the speed of the elevator. during the deceleration or acceleration phase, the speed of the loop also changes and the cable starts to oscillate. The larger the speed range, the greater the risk that the rope, belt 30 or chain will get stuck behind one of the shaft devices due to the oscillation.

In the second type of compensation, additional masses have generally been used; ropes or cages that hang in loops between the body and the counterweight below them. These loops are additionally tightened by means of a tightening device. In this second type, the oscillation is prevented by means of a controlled tightening weight. As a prior art, the solution disclosed in U.S. Pat. No. 3,653,467 can be mentioned. The disadvantages are that it is potassium and • complex in structure.

2,91850

In the solution according to the invention, these disadvantages have been eliminated, so that an expensive clamping weight is no longer needed and the speed of the loop is halved compared to the old link. This is achieved in that the compensation hoists are now preferably suspended below the elevator car at the wall mounting points and below the counterweight at the shaft wall mounting points, respectively, whereby the suspension hoist suspension method is the same as the car cable (= car electrical connection) and Both compensation loops are attached to the shaft wall at or above the halfway of the elevator car or counterweight track. As the car now moves down, both car cable and compensation loops lower and now the speed of the loop is only half the speed of the car.

15 At the same time, the counterweight rises and its compensation loop also rises. The rotational speed of the counterweight compensation loop is half the speed of the counterweight. Now that the compensation cable and body cable are suspended in the same way, it is possible to combine their functions. This can be done e.g. so that steel balls are added to the sheath of the 20 cable cables in the same way as in the Whisperflex (TM) compensation chain. The compensation arrangement according to the invention is characterized by what is stated in the characterizing part of claim 1. Other preferred embodiments of the invention are set out in the other claims.

The invention achieves considerable advantages: - The rotational speed of the loop is only half the speed of the car, so that the oscillation is considerably reduced. This Ilmid is already known for a basket cable that does not need control even at high * speeds.

- No tilting device is now required for swinging.

35 - The price of the total compensation is approximately the same as the current chain / belt compensation.

1; 3 91850 - Cox suspension can now be carried out with a basket cable which is used in whole or in part as compensation.

- In very tall houses, a locking device is not required to prevent the counter-5 weight jump if the solution according to the FI 82823 patents is used, because the counterweight speed is low and the mydsk counterweight jump is also smaller.

In the following, the invention will be described in more detail by means of Examples 10 with reference to the accompanying drawings, in which

Figure 1 illustrates a solution according to the invention when the car and the counterweight are in the middle of the shaft and Figure 2 illustrates the solution according to the invention when the car is at the top of the shaft and the counterweight is at the bottom of the shaft.

Figure 3 illustrates a solution according to the invention, in which the basket is at the bottom of the shaft and the counterweight is at the top of the shaft and 20

Figure 4 illustrates a solution in which the car cable and the car compensator are connected together,

Figure 5 shows another solution according to the invention.

25. In Figure 1 we show the structure of the solution according to the invention. It shows an elevator 1 with an elevator car 2 suspended 1: 1 and a counterweight 3 suspended 1: 1 by means of a folding wheel 6, as well as an elevator assembly 11 in which the elevator car 2 and the counterweight 30 no 3 are suspended, and traction wheel 5, the movement of which is selected via the car seat 11 to the elevator car 2 and to the counterweight 3. Tasså ·. in the solution the car cable 4 is preferably fastened from the elevator car 2 to the fastening point 8 in the shaft wall M and the compensation loop 7a is also fastened from the car 2 to the fastening point 9 in the wall 35, the on the wall in the halfway of the elevator car 2 or the counterweight 3 of the path 91850 4 or above. The fastening of the basket cable 4 is at the same height as the compensation cables. The rotational speed of the compensation loop 7b of the counterweight 3 is half the speed of movement of the counterweight 3 and the rotational speed of the compensation loop 7a of the elevator car 2 is half the speed of movement of the elevator car 2.

We now consider a situation in which the elevator car 2 and the counterweight 3 are both located in the halfway of the gap. In this case, a mass equal to 10% of the counterweight is added to the elevator car 2, in which case the elevator car 2 should be in balance with the counterweight 3. The machine brake can now be opened without the movement of the car 2 and the counterweight 3. This is only possible if the cohesive forces on the side of the elevator car 2 and the counterweight 3 are equal. At this point, the suspension hoists 11 on the side of the elevator car 2 15 and the counterweight 3 are approximately the same length, which is half the lifting height H. The mass / unit of measurement of the lifting car = M1. A compensation loop 7a hangs below the elevator car 2. The length of this depending on the elevator car 2 is at this point in a semicolon, i.e. about \ lifting height H. The mass / unit 20 of the car cable 4 is M2 and the mass / unit of the compensation loop 7a is M3. The counterweight 3 has the mass of the elevator car 2 + balancing percentage * nominal load + so-called cable surcharge. Below the counterweight 3 hangs the compensating loop 7b of the counterweight 3, the part of which depending on the counterweight 3 is ¼ from the lifting height H. The mass of this compensating loop 7b is also M3 / unit of measurement. Lift car 2 unladen weight. is P, the nominal load is Q, the equilibrium degree of the counterweight 3 is T and X is the so-called. additional mass added to counterweight 3 to achieve equilibrium in the halfway gap.

30 The equilibration formula is as follows: P + Q * T +% H * M1 + ^ H * (M2 + M3) = P + Q * T + X +% H * Ml + ^ H * M3 (1), it follows that formula (2) X =% H * M2

From the formula we solve the additional mass X (2) of the counterweight 3.

With this extra mass X we now reach equilibrium.

Figure 2 now shows a case where the elevator car 2 is at the top of the shaft and the counterweight 3 is at the bottom of the shaft.

35 5 91850

The equilibration formula is now as follows (3), when formula (2) is added to it. P + Q * T +% H * (M2 + M3) = P + Q * T + X + Ml * H (3), 5 P + Q * is obtained. T +% H * (M2 + M3) = P + Q * T +% H * M2 + M1 * H (4), from which it follows that M3 = 2M1-% M2 (5).

Figure 3 shows a solution in which the elevator car 2 is in the lower part of the shaft and the counterweight 3 is in the upper part of the shaft, respectively.

10

The equilibration formula is now formed as follows: P + Q * T + H * M1 = P + Q * T + X + M3 * then formula (2) (2) X =% H * M2 is added to give P + Q * T + H * M1 = P + Q * T +% H * M2 + M3 *% H, from which it follows that 15 (6) M3 = 2M1 -% M2, which is the same as formula (5) Using the additional mass X = * M2 and the compensating mass M3 = 2M1 -% M2 a situation is obtained in which the elevator is in balance regardless of the position of the elevator car 2 and the counterweight 3.

Figure 4 shows an alternative solution in which the basket cable 4 can also be used in whole or in part as compensation. If the basket cable 4 acts as a full compensation, we get the solution model according to Fig. 4. The elevator car 2 is located in the middle of the shaft in the case of tassS, the additional mass X is zero and from formula (2) 25 we get that MS = 0. It also follows that from formulas (4) and ·. (6) M3 = 2 * Ml. TamS means that we can use the basket cable 4 as compensation.

Fig. 5 shows a solution which can be used in patent patent 82823. In this solution, the counterweight 3 is twice as heavy as in the above-mentioned Figures 1-4 and the trajectory and speed of the counterweight 3 are half the trajectory of the elevator car 2. Figure 5 shows the elevator car 2 in the aria positions. This also provides a fully compensated solution. The mass / unit of measure of the compensating loop 7b of the counterweight 3 is larger than the mass / unit of measurement of the compensation loop 7a of the elevator car 2. In the same way as shown in Figures 1 to 4, the necessary formulas can be solved by applying the respective equilibrium formulas for the different solutions of the elevator car 2 and the counterweight 3. The formulas depend on the position of the trajectory of the counterweight 3, which may be different depending on the case.

It will be apparent to those skilled in the art that the various embodiments of the invention are not limited solely to the examples set forth above, but may vary within the scope of the claims set forth below.

10 15 20 25 30 35

Claims (2)

7 91850 A compensation arrangement in an elevator, wherein the elevator (1) comprises 5 elevator cars (2), a counterweight (3) and an elevator suspension assembly (11) in which the elevator car (2) and the counterweight (3) are suspended, and a traction sheave (5) whose movement is transmitted via a suspension assembly (11) to the elevator car (2) and the counterweight (3), as well as the car cable (4) and at least one folding wheel (6), characterized in that - the compensation arrangement is formed by at least one compensation loop (7a) is suspended from the elevator car (2) and the shaft wall and from at least one counterweight (3) compensation loop (7b) suspended from the counterweight (3) and the shaft wall, ) and the rotation speed of the compensation loop (7a) of the elevator car (2) is half the speed of the elevator car (2) and that the 20th compensation loops (7a, 7b) are fixed to the wall of the shaft with. Compensation arrangement 25 according to Claim 1, characterized in that the basket cable (4) is used in its entirety. or partially in the compensation loop of the car (2). 30 35 8 91850