Gear or shaft with vibration suppressor

Abstract

The invention relates to a transmission having at least one vibration suppressor (101). The vibration suppressor (101) is arranged on a gear (111) or a shaft (113, 501, 701) of the transmission.

Description

Technical Field

[0001] The invention relates to a transmission device according to the preamble of claim 1 and to a method according to claim 12 . Background Art

[0002] Wind turbine transmissions are often subject to severe vibrations that can lead to damage to the transmission and undesirable noise emissions. Summary of the invention

[0003] The object of the present invention is to improve the vibration behavior of a transmission. This object is achieved by a transmission according to claim 1 and a method according to claim 12. Preferred developments are contained in the dependent claims and are derived from the following description.

[0004] The transmission according to the invention has at least one vibration damper, which is a device for damping or reducing structure-borne sound.

[0005] According to the invention, the vibration damper is arranged on a gear or a shaft of the transmission. This means that the vibration damper or a part of the vibration damper engages with the gear or the shaft. Preferably, the vibration damper dampens the rotational vibrations of the gear or the shaft.

[0006] The gear is preferably connected to the shaft in a rotationally fixed manner. In particular, the gear can preferably be engaged with the shaft in a single piece.

[0007] By placing the vibration damper according to the invention directly on the gear or shaft, structure-borne noise can be eliminated at the point where it occurs. This prevents structure-borne noise from propagating in the transmission and causing damage or being emitted as excessive noise or airborne sound.

[0008] In a preferred development, at least one vibration damper has a main damper mass. This is a one-piece or multi-piece component that is acted upon with vibrations via one or more springs of the vibration damper and / or via one or more dampers of the vibration damper. These are preferably rotational vibrations.

[0009] A spring is a device that couples two elements to each other, and the spring force is opposite to the movement of these elements relative to each other. The spring can be implemented as a steel spring or an elastomer. It is also possible to use a spring with a nonlinear characteristic curve or a spring whose spring stiffness varies depending on the signal.

[0010] A damper is a device that dampens the relative motion of two components.

[0011] Currently, the main damper mass is coupled to the gear or shaft via a spring and / or a damper. This means that the two elements are the main damper mass and the gear or shaft. Accordingly, the spring and / or the damper engages with the main damper mass on one side and engages with the gear or shaft on the other side. According to a further development, the main damper mass is movable, preferably rotationally movable, relative to the gear or shaft.

[0012] In an alternative preferred development, the vibration damper has a secondary damper block in addition to the main damper block. The secondary damper block is preferably also embodied in one piece and is engaged with a gear or a shaft.

[0013] The improvement provides that the main suppressor block is not coupled to the gear or shaft directly, but via the secondary suppressor block. This means that the main suppressor block is coupled to the secondary suppressor block via one or more springs and / or one or more dampers. According to the improvement, the elements whose relative movement resists the springs and / or is damped by the dampers are the main suppressor block and the secondary suppressor block. Specifically, the springs and / or dampers engage with the main suppressor block on one side and engage with the secondary suppressor block on the other side. According to the improvement, the main suppressor block can move relative to the secondary suppressor block, preferably in a rotational motion.

[0014] Preferably, the secondary damper mass is improved into a housing, in which a spring and / or a damper of the vibration damper is arranged.

[0015] In a preferred development, the primary damper mass and / or the secondary damper mass are rotationally symmetrical with respect to an axis of rotation of the gear, which axis of rotation is identical to the axis of rotation of the shaft. Preferably, the primary damper mass and / or the secondary damper mass are also arranged concentrically with respect to the axis of rotation. This results in a balanced rotational behavior without imbalance.

[0016] Furthermore, the primary suppressor mass and / or the secondary suppressor mass preferably has the basic shape of a torus. This is a body of revolution with a hole in the center. The body of revolution is formed by the revolution of a surface around an axis of revolution. The surface is, for example, rectangular.

[0017] The basic shape of a body or a part of a body refers to the shape of an initial body or a part of the initial body, which is formed by: eliminating certain areas, such as adding blank portions and / or adding certain areas; or its shape corresponds to the shape of the body mentioned at the beginning.

[0018] In a preferred refinement, the primary suppressor block and / or the secondary suppressor block has a continuous recess. This is particularly the case if the primary suppressor block and / or the secondary suppressor block has a basic shape of a torus. According to a refinement, the shaft extends through the recess in the primary suppressor block and / or through the recess in the secondary suppressor block.

[0019] The shaft can be in the torque flow extending from the input shaft of the transmission to the output shaft of the transmission and thus be loaded with torque (which is part of the torque flow). In a preferred improvement, the shaft is torque-free. Therefore, the shaft is not in the torque flow extending from the input shaft to the output shaft.

[0020] Alternatively, according to a further development, the shaft is driven by another shaft, which itself is located in the above-mentioned torque flow. The other shaft thus conducts the torque (which is part of the torque flow). The other shaft is in driving connection with the shaft mentioned at the beginning, so that the shaft is driven by the other shaft. The drive is preferably carried out so that the aforementioned shaft rotates faster than the other shaft. As a result, the vibrations of the shaft mentioned at the beginning are transmitted to the other shaft with an increased amplitude. This is advantageous because the damping performance is improved.

[0021] The transmission is preferably developed into a wind power transmission. This development is advantageous because the above-mentioned vibration problem is particularly evident in a wind power transmission.

[0022] The transmission is preferably improved with at least one planetary stage. The above-mentioned shaft is improved to become the sun shaft of the planetary stage. According to a further development, the above-mentioned gearwheel forms the sun gear of the planetary stage.

[0023] Preferably, the input shaft of the transmission is developed as a hollow shaft. According to a further development, the input shaft and the above-mentioned shaft are oriented coaxially with respect to one another, ie have the same axis of rotation.

[0024] The input shaft modified into a hollow shaft is advantageous because it allows, according to the method according to the invention, to guide the vibration damper through the input shaft and to place it on a gear or the above-mentioned shaft. Preferably, for this purpose, the planet carrier of the above-mentioned planetary stage is also hollow, i.e. has at least one recess centered or centered with respect to its axis of rotation. In particular, the side plates of the planet carrier, preferably the side plates on the rotor side, can have such a recess. By means of the improved scheme, the transmission can be retrofitted with a vibration damper in the installed state. In particular, it is possible to retrofit a wind power transmission in the tower of a wind power plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings show preferred embodiments of the present invention. Identical reference numerals represent identical or functionally identical features. Specifically:

[0026] Figure 1 The vibration dampener on the sun gear is shown;

[0027] Figure 2 A vibration suppressor is shown placed on the sun shaft on the generator side;

[0028] Figure 3A vibration damper is shown placed on the sun shaft on the rotor side;

[0029] Figure 4 shows the installation of the vibration damper inside the sun shaft;

[0030] Figure 5 A vibration suppressor on the output shaft is shown;

[0031] Figure 6 A vibration damper is shown mounted on the output shaft on the rotor side; and

[0032] Figure 7 A vibration damper is shown mounted on the intermediate shaft. DETAILED DESCRIPTION

[0033] Figures 1 to 7 A vibration damper 101 is shown separately. It has a main damper mass 103 and a secondary damper mass 105. The main damper mass 103 is coupled to the secondary damper mass via a spring 107 and a damper 109.

[0034] The secondary damper block 105 is used to absorb and reduce vibrations of the component. To this end, the secondary damper block 105 is fixed in the component rigidly, ie without the possibility of relative movement between the secondary damper block 105 and the component.

[0035] according to Figure 1 The component in which the secondary damper block 105 is fixed is the sun gear 111 of the wind power transmission. Starting from the sun gear 111, the vibration damper 101 is arranged on the generator side. The secondary damper block 105 is fixed on the end face of the sun gear 111 on the generator side.

[0036] The sun gear 111 is connected to a sun shaft 113 in a rotationally fixed manner. The sun shaft extends through central holes of the primary damper block 103 and the secondary damper block 105 .

[0037] Figure 2 The vibration suppressor 101 shown is Figure 1 The vibration damper of is different in that the auxiliary damper block 105 is not placed on the sun gear 111 but on the sun shaft 113. For this purpose, the sun shaft 113 has a flange 201. The auxiliary damper block 105 engages with the flange.

[0038] like Figure 2 As shown, the flange 201 and the corresponding vibration damper 101 are located on the generator side starting from the sun gear 111. Figure 3 The arrangement on the rotor side is shown. Here, the flange 201 of the sun shaft 113 is located on the rotor side starting from the sun gear 111. Correspondingly, the vibration damper 101 is arranged on the rotor side.

[0039] according to Figure 4 The above-mentioned sun gear 111 is part of a planetary stage 401 on the generator side. This planetary stage is connected downstream of a planetary stage 403 on the rotor side. The planetary stage 403 on the rotor side is in turn coupled to a rotor shaft 405 .

[0040] The sun shaft 407 of the rotor-side planetary stage and the rotor shaft 405 are designed as hollow shafts. This makes it possible for the fitter 409 to guide the vibration damper 401 through the rotor shaft 405 and the sun shaft 407 of the rotor-side planetary stage 403 and to fasten it to the flange 201 .

[0041] like Figure 5 As shown, the vibration damper 101 can also be arranged on the output shaft 501. The output shaft 501 is part of a spur gear stage. It protrudes from the housing of the transmission on the generator side. The vibration damper 101 is arranged there.

[0042] Specifically, the secondary damper mass 105 engages the output shaft 501 outside the transmission housing. The primary damper mass 103, spring 107 and damper 109 are also located outside the transmission housing. Since the vibration damper 101 is arranged outside the transmission housing, subsequent installation is possible.

[0043] It is also possible to arrange the vibration damper 101 on the rotor-side end face of the output shaft 501 . Figure 6 This arrangement is shown. Here, the secondary inhibitor block 105 engages with the output shaft 501 at the end side.

[0044] Figure 7 The vibration damper 101 is shown disposed on the intermediate shaft 701. The secondary damper mass 105 is engaged with the intermediate shaft 701.

[0045] The intermediate shaft 701 is driven by the sun shaft 113. It is driven only by the sun shaft 113 and does not drive another shaft itself. The gear ratio between the sun shaft 113 and the intermediate shaft is designed so that the intermediate shaft 701 rotates faster than the sun shaft. This results in a higher relative acceleration in the vibration damper 101 and therefore a higher damping performance.

[0046] Reference numerals list

[0047] 101 Vibration Suppressor

[0048] 103 Suppressor Block

[0049] 105 Suppressor Block

[0050] 107 Spring

[0051] 109 Damper

[0052] 111 Sun gear

[0053] 113 Sun Axis

[0054] 201 Flange

[0055] 401 Planetary Level

[0056] 403 Planetary Level

[0057] 405 rotor shaft

[0058] 407 Sun Axis

[0059] 409 Assembler

[0060] 501 Output shaft

[0061] 701 Intermediate shaft

Claims

1. A transmission device having at least one vibration damper (101), It is characterized in that The vibration damper (101) is mounted on a gear (111) or a shaft (113, 501, 701) of the transmission.

2. The transmission device according to claim 1, It is characterized in that The at least one vibration damper (101) has a main damper mass (103) which is coupled to the gear (111) or the shaft (113, 501, 701) via one or more springs (107) and / or via one or more dampers (109).

3. The transmission device according to claim 1, It is characterized in that The at least one vibration suppressor (101) has a main suppressor block (103) and a secondary suppressor block (105), wherein: The secondary inhibitor block (105) is engaged with the gear (111) or the shaft (113, 501, 701), wherein: The primary suppressor mass (103) is coupled to the secondary suppressor mass (105) via one or more springs (107) and / or one or more dampers (109).

4. Transmission device according to the preceding claim, It is characterized in that The secondary suppressor mass (105) forms a housing in which the primary suppressor mass (103), the one or more springs (107) and / or the one or more dampers (109) are arranged.

5. The transmission device according to any one of claims 2 to 4, It is characterized in that The primary inhibitor block (103) and / or the secondary inhibitor block (105) are rotationally symmetrical relative to the rotation axis of the gear (111) and / or the shaft (113, 501, 701).

6. Transmission device according to the preceding claim, It is characterized in that The primary suppressor block (103) and / or the secondary suppressor block (105) has a basic shape of a torus.

7. The transmission device according to any one of claims 2 to 6, It is characterized in that The shaft (113, 501, 701) extends through a recess in the primary suppressor block (103) and / or through a recess in the secondary suppressor block (105).

8. A transmission according to any one of the preceding claims, It is characterized in that The shaft (701) is not located in the torque flow extending from the input shaft (405) to the output shaft (501) and is driven by the shaft (113) which is located in the torque flow.

9. A transmission according to any one of the preceding claims, It is characterized in that The transmission device is designed as a wind power transmission device.

10. A transmission according to any one of the preceding claims, It is characterized in that The shaft (113) is designed as a sun shaft of a planetary stage (401), wherein the gear (111) is designed as a sun gear of the planetary stage (401).

11. A transmission according to any one of the preceding claims, Features An input shaft (405) is provided which is designed as a hollow shaft, wherein The input shaft (405) and the shaft (113) are oriented coaxially with respect to one another.

12. Method for mounting a vibration damper (101) of a transmission according to the preceding claim on a shaft (113), It is characterized in that The vibration damper (101) is guided through the input shaft (405) and is mounted on a gear (111) or a shaft (113, 501, 701).

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