EP1673301A1

EP1673301A1 - Drive system for narrow machine spaces

Info

Publication number: EP1673301A1
Application number: EP04786869A
Authority: EP
Inventors: Dietmar KÜNTSCHER; Klaus Fichtner; Horst Wittur
Original assignee: Wittur AG
Current assignee: Wittur AG
Priority date: 2003-10-13
Filing date: 2004-09-29
Publication date: 2006-06-28
Anticipated expiration: 2024-09-29
Also published as: WO2005040029A1; RU2300490C2; EP1673301B1; DE502004002404D1; RU2006107529A; ATE348782T1; ES2274488T3

Abstract

The invention relates to a drive system for narrow machine rooms, comprising a slim built drive motor (2), a driving disk (3) having a smaller diameter in relation to the driving disk (2) and a double cable grip by means of an opposite pulley (4) and a cable suspension of the elevator car (8) of at least 2:1. The drive mechanism (2, 3) together with the opposite pulley (4) and the cable fixtures (13, 19) and/or additional deflection pulleys (10, 21) are mounted in a common base frame (1) on the elevator car and the counterweight sides, said base frame being in turn mounted with or without any additional elastic elements and without any fixtures on the ceiling (6) of the machine room.

Description

Besehreibung

Drive system for narrow engine rooms

The invention relates to a drive system for narrow engine rooms with a narrow-built drive motor, a smaller diameter traction sheave with double Seilum- schlingung on a counter pulley and a cable suspension of at least 2: 1.

Traction sheave drives with double Seilumschlingung in which the drive motor with traction sheave and counter pulley are placed in a common engine room or in separate rooms are known. Under drive motor is understood below both a gearless drive motor and a geared motor.

As a support structure between the bearings of the traction sheave and the bearings of the counter-disc steel structures are a possibility, for example, according to EP 0 100 072 A2. For very large drives, the support structure can also be a lying between the traction sheave and countershaft shaft ceiling, as described for example in DE 24 41 992 AI.

When using very small engine rooms, z. B. if the engine room in the vertical view (top view) corresponds to the shaft cross-section or at least two walls of the shaft continue vertically in the engine room, there are in aforementioned cited drives with conventional, long-building drive motors whose overall length is greater than their diameter, considerable space problems ,

Here, a drive in narrow construction offers, whose axial length is shorter than its diameter (US 5 018 603). Thanks to its slim design, it enables the space between the distance between the car and the counterweight together with elevators with counterweights behind the car optimal use. According to said US 5 018 603, the traction sheave engages over the drive motor components, whereby the drive is extremely flat. However, this is at the expense of the diameter of the traction sheave. The diameter of the drive disk is larger than the diameter of the drive motor. However, since the torque increases proportionally to the square of the diameter of a traction sheave, this design requires a very powerful drive motor, especially since the drive motor described is gearless and is operated with a 1: 1 suspension of the car.

The invention has for its object to provide a easy to assemble, durable drive system for narrow engine rooms, with particular emphasis on a simple marriage, low cost and easy access to the drive and the car is placed.

The object is achieved by the features of claim 1. Advantageous developments indicate the accompanying claims.

A slim-line drive motor in conjunction with a smaller diameter traction sheave - always based on the diameter of the drive motor - and a counter pulley for a double Seilumschlingung the traction sheave creates the possibility to realize an overall very small drive with low energy consumption and a relatively gentle stress on the ropes , Especially for large heights and high speeds brings a double wrap the traction sheave and the associated increased propulsion great advantages. It can be done in favor of "semi-circular" grooves in the traction sheave on otherwise common grooves with "undercut" or "wedge cut", which has a very beneficial effect on the life of the ropes and the traction sheave itself In addition, a rope drive with double wrap any desired system spacing be easily adapted between the car and counterweight. Due to at least a 2: 1 suspension of the car and the counter load in addition to the arrangement of a counter pulley for a double wrap of the traction sheave a particularly small design for a space-saving arrangement of the drive in the engine room is possible. Even without an undercut in the grooves of the traction sheave or wedge cut of the grooves, a high driving force is achieved with a small diameter of the traction sheave. The arrangement of a smaller diameter traction sheave relative to the diameter of the drive motor allows, in particular for a 2: 1, 3: 1 or 4: 1 suspension, the use of thinner ropes for the same payloads. The use of thinner ropes in turn affects the axial length of the traction sheave so that despite the double the number of grooves due to the double wrap the length of the traction sheave and thus the length of the entire

Drive still remains relatively narrow. When using 4 or more thin ropes, the life of the ropes additionally increased by the fact that with greater elongation of a rope in comparison to the other ropes, the other ropes have to take over only a relatively small proportion of the total force. Likewise, the service life of the traction sheave, the counter pulley and the pulleys increases, since the payload is distributed over several cables and thus grooves.

The Seilendbefestigungen and / or other pulleys required in at least one 2: 1 suspension of the car are arranged in a further embodiment of the invention together with the drive on a common base frame. The drive (consisting of the slim-line drive motor with gear or gearless, a terminal box, a braking device and the traction sheave), the counter-disc, the base frame, the attachment points and / or other pulleys together form a system unit. The base frame itself is equipped with feet or special vibration-damping supports. The system unit according to the invention thus comprises, with the exception of the cable harness, the entire technical equipment. The assembly is by simply putting up Can be realized without any fastening means for the base frame in the engine room. This is possible because in the system unit without additional adjustments, the sum of all horizontally acting static and dynamic forces is almost zero and thus displacements of the system unit does not take place on their AufStellungsfläche.

The system unit can thereby be installed in a particularly simple manner. With a hoist, the system unit is inserted into the machine room without further attachment work. The machine frame rests stable, tilt and shift safe on its preferred rubber pads. All that remains is to fasten the ends of the corresponding threaded rope string to the attachment points specified on the machine frame. This is usually done using rubber or spring-loaded tie rods, at the ends of which are cable eyelets. Alternatively, in the case of a 3: 1 suspension, the cable strand is guided via additional deflection rollers already mounted in the base frame.

Due to the overall relatively narrow design of the system unit, it is possible to optimally use the space between the system distance of car and counterweight for elevators with counterweight behind the car by next to the actual installation of the system unit required by the rules handling the machine is possible. This handling is easily guaranteed on 3 sides. As a result, the engine room requires no larger footprint than that predefined by the elevator shaft.

In one embodiment of the invention, the counter load is not guided between the rear wall of the car and the rear wall of the shaft, but between side walls of the car and shaft. Accordingly, the car guide pulley and counterweight pulley is rotated 90 °. This requires, on both sides of doors in the shaft and in the car, a mutual access and possibly a passage through the car possible.

In one embodiment of the invention, the base frame for better transport in a part with drive and counter pulley and a part with the Seilendbefestigungen and / or other pulleys is divided. As a result, facilitate assembly work in problematic structural conditions.

According to a further modification of the invention, the drive to increase the allowable static load and thus the total mass of the entire elevator is equipped with an outer bearing next to the traction sheave.

Furthermore, according to an advantageous embodiment of the free space between the cable end connections and / or other pulleys for the installation of a motor drive unit and optionally for a control device for the elevator is available. The motor drive device can thus be a component of the system unit in a further development of the invention and to that extent also be mounted and installed at the factory.

In a further embodiment of the invention, the cable strand sections to the car and the counterweight run obliquely to the vertical, in such a way that in the sum again result in vertical resulting total forces both for the car and for the counterweight.

The invention will be explained in more detail with reference to an embodiment. In the accompanying drawings show:

Figure 1 shows a system unit for a counterweight guide between the rear wall of the car and the shaft rear wall with double wrap and 2: 1 suspension in a front view. FIG. 2 shows the same system unit in a side view; FIG.

FIG. 3 shows the same system unit as seen from above on the engine room; FIG.

FIG. 4 shows the same system unit as seen from above on the car and counterweight; FIG.

5 shows a system unit for a side of the car running counter load in the side view.

6 shows the system unit according to FIG. 5 with a view from above onto the car and the counterweight;

Fig. 7 shows a system unit for a rear counterweight guide with double wrap and 3: 1 suspension in a side view and

8 shows a system unit for a rear counterweight guide with double wrap and 4: 1 suspension in a side view.

In Fig. 1, a system unit with double wrap and 2: 1 suspension is shown schematically in a front view. On a base frame 1, a drive motor 2 is mounted, which drives a traction sheave 3 positively connected to the rotor of the drive motor 2. The traction sheave has a smaller diameter than the drive motor. The drive motor is either gearless or he takes on a transmission, such as a planetary gear. On the base frame 1 also sits a counter pulley 4 for double wrapping the traction sheave 3 with a strand of round cables 5. According to Fig. 1, the traction sheave 3 and the counter pulley 4 are arranged vertically offset, and that is the counter pulley 4 below the traction sheave 3 and of the drive motor 2 mounted on the base frame 1. But it can also be a substantially horizontal arrangement of traction sheave. 3 and counter-disc 4 can be selected. The horizontal center distance of traction sheave 3 and the opposite pulley 4, so the center distance of the ropes 5 for car and counterweight, is selected according to the diameter of the traction sheave 3 and the opposite pulley 4 and the system distance of the car and counterweight. There is thus no deflection disk in addition to the counter disk 3 is required. The base frame 1, together with the base frame 1 factory-mounted drive (drive motor 2, traction sheave 3, braking device, junction boxes and other accessories) and the factory already mounted counter pulley 4 with a hoist on the manhole cover 6 of an elevator shaft set from in Fig. 1, the rear wall 7 is partially indicated. In the shaft ceiling 6 there are openings for leading to and from the car 8 rope strand sections 11, 12 and to and from the counterweight 14 leading rope strand sections 17, 18 of the rope strand fifth

The car 8 is taken approximately symmetrically in a car frame 9. The symmetry of a "symmetrical suspension" depends essentially on the center of gravity of the unloaded one

Car 8 from. This center of gravity may vary, for example, due to the weight of the car door used.

At the top of the car frame 9 is a car deflecting roller 10 for a minimum of 2: 1 suspension ("upper bottle").

Between the rear wall of the car 8 and the shaft wall 7 runs in a counterweight frame 15 taken counterweight 14. Above in the counterweight frame 14, a counterweight pulley 16 is mounted. The center distance of the cable strand sections 11, 12 to the cable strand sections 17, 18 forms the system spacing of car 8 and counterweight 14.

The cable strand 5 is fastened with its one end (cable strand section 12) to a car-end cable end attachment 13 on the base frame 1 in a conventional manner. In the base frame 1 all necessary precautions are already taken at the factory. Starting from the cable strand section 12 wraps around the cable strand 5 the car guide pulley 10, runs as a cable section 11 up again, leads over the traction sheave 3 to the opposite pulley 4, wraps around the counter pulley 4 and leads back to the traction sheave 3 and wraps around this for the second time, again leads to the counter pulley 4 and runs from this as a strand section 17 to the counterweight pulley 16, wraps around the counterweight pulley 16 and ultimately leads back up to the Seilendbefestigung 19 on the base frame 1 on the side of the counterweight 14. Both ends of the rope strand 5 are thus on the base frame 1 at the factory attached to predetermined Seilendbefestigungen. Thus, all mounting and adjustment work in the shaft itself is omitted and the roof of the engine room does not have to be designed to carry the car, counterweight and rope loads. One recognizes from the front view that left of

Base frame 1, seen in vertical alignment with the car 8, enough space for a three-way detour for maintenance personnel is present without the engine room would have to be extended beyond the shaft on this side.

FIG. 2 schematically shows the same system unit according to FIG. 1 in a side view. The same reference numerals - as in the following figures - each have the same components.

Shown is the base frame 1 with the narrow drive motor 2, for a double wrap relatively narrow traction sheave and the opposite pulley 4. In addition, the base frame 1 carries according to an embodiment of the invention and depending on the space immediately adjacent to the drive motor 1, a motor drive device 20 and / or a control device for the elevator, for example, a converter. On the base frame 1, the car-end Seilendbefestigung 13 can be seen. The attached to this Seilendbefestigung 13 cable section 12 leads through a breakthrough in the shaft ceiling 6 to the cage frame 9 for the car 8 mounted car deflection roller 10, wraps around this car-pulley 10 and continues as a rope section 11 to the traction sheave 3 of the drive. The further rope run is described in detail in FIG.

It can be seen from the side view that seen right and left of the base frame 1, seen in vertical alignment with the car 8 or car frame 9, despite additional motor drive unit 20 and / or a control device for the elevator sufficient space for a three-sided handling is available without that the engine room on this side would be extended beyond the shaft.

From FIG. 3, which schematically shows the same system unit with a view from above onto the machine room, it is even clearer to recognize the small area requirement of the base frame 1, which drives the drive motor 2 with the traction sheave mounted in a form-fitting manner

3, the directly in the base frame 1 mounted counter pulley

4, the Seilendbefestigungen 13, 19 for the cable strand sections 11, 17 of the cable strand 5 and the motor drive unit 20 and / or a control device for the elevator as a system unit träg.

In comparison, Fig. 4 shows schematically for the same drive arrangement, the view from above of the car 8 and the counterweight 14 within the not shown

Shaft walls. On the upper side of the car frame 9 which is mounted there car deflecting pulley 10 with the cable strand sections 11, 12 to the car 8 and 8 seen from the car and on the upper side of the counterweight frame 15, the there stored counterweight deflection roller 16 with the Seilstrangabschni th 17th , 18 to the counterweight 14 and the counterweight 14. With x, a distance in the offset in the axial direction of car deflection roller 10 and counterweight guide roller 16 is designated. This offset is dependent on the center of gravity of the empty car 8 and the arrangement of the counterweight 14 in the shaft. The car 8 and the counterweight 14 are suspended in the center of gravity or near their centers of gravity and the Cable strands 11, 12, 17, 18 run in the factory-set system distance of the car 8 and counterweight 14 almost perpendicular or inclined in each case in the same opposite angle and thus with a vertical resultant. This makes it possible to set up the base frame 1 without any measures for its anchoring on the shaft ceiling 6 in the engine. In addition, no or only extremely small moments on the - not shown - guide rails for the car frame 9 and the counterweight frame 15, whereby at the same time decrease the friction losses during driving.

Incidentally, a not designated in the figures offset by half the rope diameter in the direction of the traction sheave 3 and mating pulley of the double Seilumschlin- tion is provided. The car access is one-sided (front).

In Fig. 5 and Fig. 6, a system unit according to the invention is shown in highly schematic form, which is provided for suspension of the counterweight between a side wall of the car and a side wall of the shaft. The shaft walls themselves are not shown. As can be seen, the car 8 and car frame 9 are rotated by 90 ° as compared with FIGS. 1 and 4 to allow access of the car from two opposite sides (from right and left in FIG. 6). This allows, for example, the loading of conveyed. Fig. 6 shows the view from above. It is on both sides of doors in the shaft and in the car assuming a passage (in Fig. 6 from right to left and vice versa) possible. Such an arrangement should also be provided in buildings which, for example, only allow access to the shaft on a floor-by-floor basis.

Accordingly, the car deflecting roller 10 is mounted relative to the car 8 and the counterweight guide roller 16 and the counterweight 14 twisted / staggered. Of course, car and counterweight in any even-numbered relationship, even to each other, be suspended.

In a 3: 1 suspension of car and counterweight of FIG. 7, the cable section 12 of the cable strand 5 is not attached to a Seilendbefestigung the base frame 1, but as a strand section 12 initially passed over a further guide roller 21, which is mounted in the base frame 1, and only after its deflection at a Seilendbefestigung 13 is fixed to the car frame 9. Accordingly, the cable strand section of the counterweight deflection roller initially passes over a deflection roller likewise mounted in the base frame 1 and is fastened to the counterweight frame 9 only after its deflection at a cable end attachment. The axes / waves of the additional guide rollers 21 are preferably in alignment and the guide rollers 21 themselves parallel to each other at a distance in the space behind the drive motor traction sheave unit 2, 3 and the opposite pulley 4. see or even behind or above the two guide rollers 21st is still enough space for the installation of a motor control device and / or a control device for the elevator. Thus, the engine room with, for example, three-sided accessibility of the drive does not require a larger floor plan than for the elevator shaft itself.

All Seilendbefestigungen and mounted in the base frame 1 pulleys are factory already provided according to the planned system spacing or cable center distance of the elevator, which is why account also for a 3: 1 - suspension all adjustments for the installation of the system unit. Again, the installation of the fully assembled base frame 1 without any further attachment to the shaft ceiling 6. The resulting rope forces act in the vertical direction, which is why the base frame 1 can not move laterally. According to FIG. 8, a 4: 1 suspension can also be realized in a simple manner. The Seilendbefestigung 13 for the cable section 12 to the cabin and the attachment point for the cable section to the counterweight are both in the base frame 1, as shown in FIG. 1 to FIG. 3 can be seen. Also, the car-side cable section 12 is guided by the Seilendbefestigung 13 on the base frame 1 coming over a first in the upper car frame 9 mounted pulley 10. In the following, however, the cable strand 5 is deflected as a cable strand section 11 via a deflection roller 21 mounted in the base frame 1 and again via a second deflection roller 10 mounted in the upper cage frame, before the cable strand 5 twice wraps around the traction sheave 3 and the opposite pulley 4. On the load side, the cable strand guide takes place in the same way.

Between or behind or above the two pulleys 21 on the base frame 1 is still enough space for - preferably factory - installation of a motor drive unit 20 and / or a control device for the elevator. Nevertheless, a proper handling around the machine is ensured on 3 sides, without the engine room requires a larger area, as this gives the shaft cross-section.

The Seilendbefestigungen for the Seilstrangenden on the base frame 1 and mounted in the base frame 1, the car frame 9 and the counterweight frame pulleys are factory already provided according to the planned system spacing or cable center distance of the elevator, which is why even with a 4: 1 suspension all adjustments for installation the system unit omitted. Again, the installation of the fully assembled base frame 1 without any further attachment to the shaft ceiling 6. All forces acting according to the resulting rope string guide in the vertical direction, so the base frame 1 can not move laterally. As in the other cases of Suspension are applied to the guide rails for the car frame 9 and the guide rail for the counterweight frame no or negligible small moments and occurring during driving frictional forces are minimized.

But it is also possible to choose a larger Untersetzungsverhältnis for the counterweight than for the car when it comes to reducing the maximum torque of the prime mover to the detriment of the mass of the counterweight or a clearance in the pit head due to the reduced path for the counterweight create.

The system unit can be split in all versions for better transport and better installation. Advantageously, the division takes place through the base frame 1 into a part with the drive 2, 3 and the counter disk 4 and into another part with the cable end fastenings 13, 19 or / and the possibly further deflection rollers. Both parts of the system unit can be set up with their base frames individually next to one another or joined together without any further anchoring on the shaft ceiling 6.

In addition, the drive 2, 3 to increase the allowable static load and thus the total mass of the entire elevator is equipped with a not shown outer bearing next to the traction sheave 3.

Furthermore, according to a particularly advantageous embodiment of the free space between the Seilendbefestigungen 13, 19 and / or other pulleys 21 for the installation of a

Motoransteuergerätes 20 and optionally be used for a control device for the elevator.

A 3: 1 or 4: 1 suspension is also possible for arrangements with laterally guided counter load. For transport heights from about 30 m, travel speeds over 2 m / s and payloads up to 3 200 kg, the cable drive can be dimensioned as follows for a 2: 1 suspension of the car assumed as an example:

- Diameter of traction sheave, counter roller and deflection roller (s): 320 mm - 500 mm;

- diameter of the round ropes: 8 mm to 12 mm;

- Number of round ropes: 4 to 6.

Reference numerals:

1 base frame

2 drive motor 3 traction sheave

4 counter-disc

5 rope strand

6 shaft ceiling

7 shaft wall 8 car

9 car frame

10 car pulley

11 Cable section to the car

12 Cable section from the car to the base frame 13 Rope end attachment on the car side

14 counterweight

15 counterweight frame

16 Counterweight pulley

17 Cable section to the counterweight 18 Cable section from the counterweight to the base frame

19 Rope end attachment on the counterweight side

20 motor drive device and / or a control device for the elevator

21 Guide pulley on the base frame 1

Claims

Expectations :

1. Drive system for narrow engine rooms with a narrow drive motor, a traction sheave with a smaller diameter in relation to the drive motor with double rope wrapping over a counter pulley and a cable suspension of the car of at least 2: 1, whereby the drive (2, 3) together with the counter pulley (4) and the rope end fastenings (13, 19) and / or further deflection rollers (10, 21) on the car and counter-load side are mounted on a common base frame (1), which in turn with or without the interposition of elastic supports and is placed on the ceiling (6) of the engine room without any fastening.

2. Drive system according to claim 1, characterized in that the traction sheave (3) and the counter pulley (4) are set up at such a distance from one another that the running cable strands (11, 12; 17, 18) are at the same time the system-related center distance (x) - Correspond from car (8) to counterweight (14).

3. traction sheave drive according to claim 1 or claim 2, g e k e n n z e i c h n e t d u r c h a cable suspension 3: 1 or 4: 1.

4. Drive system according to one of the preceding claims, characterized in that the system unit (1, 2, 3, 4, 13, 19 and / or 21) through the base frame (1) in one part with the drive machine (2, 3rd ) and the counter pulley (4) and in one part with the cable end fastenings (13, 19) and / or the further deflecting rollers (21).

5. Drive system according to claim 4, since you rchgekolzen, that the base frames of the divided system unit are set up individually next to each other or assembled without any fastening on the shaft ceiling (6).

6. Drive system according to claim 3, characterized in that the cable section (11, 12) for the car (8) and / or the cable section (17, 18) for the counterweight (14) run obliquely to the vertical, but in total again for the car (8) and / or for the counterweight

(14) result in a vertical resulting total force.

7. Drive system according to one of the preceding claims, that the drive (2, 3) is equipped with an outer bearing next to the drive pulley (3).

8. Drive system according to one of the preceding claims, so that a motor control device (20) and / or a control device for the elevator are set in the factory in the free space between the cable end fastenings (13, 19) and / or further deflecting rollers (21).

9. Drive system according to one of the preceding claims, so that there is a center offset x> 0 between the system lines for the car and counterweight suspension.

10. Drive system according to one of the preceding claims, so that the counterweight (14) is guided between the rear wall of the shaft and the rear wall of the car or between a side wall of a shaft and a side wall of a car, based on the accessibility of the car.