stiffening device

Abstract

The invention relates to a stiffening device (10) for stiffening parallel fans (100) with a base body (1), wherein a first fastening element (2) for fastening to a receiving structure (15) of one of the fans (100) is formed on the base body (1), wherein a second fastening element (3) is formed on the base body (1) for fastening to a receiving structure (15) of a further, in particular immediately adjacent, fan (100), wherein the base body (1) has a tolerance compensation means (4) for, in particular stepless, adjusting a longitudinal extension of the stiffening device (10) such that in an assembled state the stiffness of the fans (100) connected by the stiffening device (10) can be increased.

Description

[0001] The invention relates to a stiffening device for stiffening parallel fans with a base body, in particular rod-shaped and / or support-shaped and / or strut-shaped.

[0002] When operating multiple fans in parallel, for example in an air handling unit (AHU), resonance frequencies of the mechanical structure can occur within the fans' speed range, depending on the mechanical design. The type of fan suspension, such as a spider mount, creates a structure prone to vibration, which, together with the mechanical support structure, leads to resonance frequencies. These resonance frequencies are excited by the imbalance of one or more fans and can result in unacceptably high vibration loads for the individual fan. This can lead to premature fan failure.

[0003] Furthermore, an air conditioning unit is typically designed precisely for the application. As a result, the dimensions and therefore the resulting resonance frequencies vary considerably.

[0004] The prior art in the present technical field is disclosed in documents JP 2016 114040 A, US 2004 0101221 A1 and US 2015 0260199 A1.

[0005] The invention is therefore based on the objective of overcoming the aforementioned disadvantages and providing a stiffening device for stiffening parallel fans, which can be adapted to an individual distance between fans and can be retrofitted easily and without elaborate aids.

[0006] This problem is solved by the combination of features according to claim 1.

[0007] The basic idea of ​​the present invention is to shift the resonant frequency of the parallel fans to higher speed ranges, with the aim of shifting the resonant frequency outside the predetermined speed range of the fans. This is achieved by means of a stiffening device, preferably strut-like, arranged on the fan's preferably spider-shaped mounting structure, preferably in a plane at the level of the fan's motor mounting. This stiffening device is universally applicable due to its simple fastening, in particular by clamping and / or locking, and its length adjustment by means of a tolerance compensation device. The stiffening device is arranged in a strut-like manner between the two fans.

[0008] According to the invention, a stiffening device for stiffening parallel fans is proposed, comprising a base body that is, in particular, rod-shaped, support-shaped, and / or strut-shaped. Furthermore, a first fastening element for attaching one of the fans to a receiving structure, in particular a bracket, housing, support, frame, and / or mounting bracket, preferably for a fan motor, is formed on the base body. In addition, a second fastening element for attaching another immediately adjacent fan to a receiving structure, in particular a bracket, housing, support, frame, and / or mounting bracket, preferably for a fan motor, is formed on the base body.Furthermore, the base body has a tolerance compensation device for stepless adjustment of the longitudinal extension of the stiffening device, such that in an assembled state the stiffness of the fans connected by the stiffening device can be increased.

[0009] In an advantageous embodiment, it is provided that the first fastening element is formed at a first longitudinal end of the base body and / or the second fastening element is formed at a second longitudinal end of the base body.

[0010] Preferably, the stiffening device is designed such that the tolerance compensation means is a threaded spindle or a telescopic mechanism, in particular one that can be fixed, or a rail system, in particular one that can be fixed.

[0011] In one embodiment of the invention, the base body is divided into a first base body part and a second base body part. The first base body part and / or the second base body part has a thread at least in one connection area and / or is designed as a bolt thread or helical. Furthermore, the tolerance compensation means is a nut, in particular a long nut, and / or a sleeve with an internal thread, which connects the first base body part and the second base body part to each other.

[0012] Furthermore, a design is advantageous in which the first fastening element and / or the second fastening element is a locking device, in particular a locking hook or a clip or a clamp or a bracket.

[0013] According to the invention, a system with at least two parallel fans is further proposed, in which a stiffening device according to the preceding disclosure is provided at least between two of the parallel fans, such that the stiffness of the fans connected by the corresponding stiffening device is increased.

[0014] In an advantageous embodiment, it is provided that a plurality of parallel fans are provided and that at least one stiffening device according to the preceding disclosure is arranged between adjacent fans.

[0015] In a further advantageous embodiment, the stiffening devices are arranged parallel to, preferably parallel to, the longitudinal direction of the fans in the longitudinal direction of the fans, and / or offset from each other.

[0016] In an alternative embodiment, it is provided according to the invention that the stiffening devices are arranged alternately with a positive slope and a negative slope on adjacent fans in the longitudinal direction of the fans.

[0017] The system according to the invention is designed in one embodiment such that at least on one fan, which is arranged at one end of a series of parallel fans, a stiffening device according to the preceding disclosure is arranged, which is attached to a wall and / or a support and / or a mounting surface of the fans with the second fastening element.

[0018] Other advantageous embodiments of the invention are characterized in the dependent claims or are described in more detail below together with the description of the preferred embodiment of the invention with reference to the figures. The figures show: Fig. 1. A perspective view of a stiffening device; Fig. 2. A schematic view of a system; and Fig. 3 a schematic view of another system.

[0019] The figures are schematic examples. Identical reference symbols in the figures indicate identical functional and / or structural features.

[0020] In Fig. Figure 1 shows a perspective view of a stiffening device 10 for stiffening parallel arranged fans 100 with a rod-shaped base body 1.

[0021] The base body 1 has a first fastening element 2 for attachment to a receiving structure 15 of one of the fans 100. Furthermore, the base body 1 has a second fastening element 3 for attachment to a receiving structure 15 of another fan 100 arranged immediately adjacent to it. The first fastening element 2 and the second fastening element 3 are each a locking device, in particular a locking hook. The first fastening element 2 is located at a first longitudinal end of the base body 1, and the second fastening element 3 is located at a second longitudinal end of the base body 1.

[0022] Furthermore, the base body 1 has a tolerance compensation means 4 for stepless adjustment of a longitudinal extension of the stiffening device 10, such that in an assembled state the stiffness of the fans 100 connected by the stiffening device 10 can be increased.

[0023] Furthermore, the base body 1 is divided into a first base body part 11 and a second base body part 12. The first base body part 11 and the second base body part 12 have a thread 13 at least in one connection area and / or are designed as bolt threads or helical connections. The tolerance compensation means 4 is a nut, in particular a long nut, which connects the first base body part 11 and the second base body part 12.

[0024] Fig. Figure 2 shows a schematic view of a system with three parallel fans 100, in which a stiffening device 10 according to one of the preceding disclosures is provided between adjacent fans 10 of the parallel fans 100, such that the stiffness of the fans 100 connected by the corresponding stiffening device 10 is increased.

[0025] The stiffening devices 10 are arranged in the longitudinal direction of the fans 100 parallel to the longitudinal direction of the fans 100 and offset from each other.

[0026] Furthermore, a stiffening device 10 according to the preceding disclosure is arranged on both fans 100, which are arranged in a row of parallel fans 100 at one end of the row, and which is attached to a wall and / or a support and / or a mounting surface of the fans 100 by means of the second fastening element 3.

[0027] In Fig. Figure 3 shows a schematic view of another system with three parallel fans 100, in which a stiffening device 10 according to one of the preceding disclosures is provided between adjacent fans 10 of the parallel fans 100, such that the stiffness of the fans 100 connected by the corresponding stiffening device 10 is increased. After the in Fig. The third further system shown essentially has the characteristics of the one in Fig. The following discussion focuses solely on the different features of the system shown in section 2.

[0028] Accordingly Fig. 3 The stiffening devices 10 are arranged in the longitudinal direction of the fans 100 alternately with a positive slope and a negative slope on adjacent fans 100.

Claims

[1] Stiffening device (10) for stiffening parallel fans (100) with a base body (1), wherein a first fastening element (2) for fastening to a receiving structure (15) of one of the fans (100) is formed on the base body (1), wherein a second fastening element (3) is formed on the base body (1) for fastening to a receiving structure (15) of another immediately adjacent fan (100), wherein the base body (1) has a tolerance compensation means (4) for stepless adjustment of a longitudinal extension of the stiffening device (10) such that in an assembled state the stiffness of the fans (100) connected by the stiffening device (10) can be increased. [2] Stiffening device (10) according to claim 1, wherein the first fastening element (2) is formed at a first longitudinal end of the base body (1) and / or the second fastening element (3) is formed at a second longitudinal end of the base body (1). [3] Stiffening device (10) according to claim 1 or 2, wherein the tolerance compensation means (4) is a threaded spindle or a, in particular fixable, telescopic mechanism or a, in particular fixable, rail system. [4] Stiffening device (10) according to claim 1 or 2, wherein the base body (1) is divided into a first base body part (11) and a second base body part (12), wherein the first base body part (11) and / or the second base body part (12) has a thread (13) at least in a connection area and / or is designed in a bolt thread or helical form, wherein the tolerance compensation means (4) is a screw nut, in particular a long nut, and / or a sleeve with an internal thread, which connects the first base body part (11) and the second base body part (12) together. [5] Stiffening device (10) according to one of the preceding claims, wherein the first fastening element (2) and / or the second fastening element (3) is a locking means, in particular a locking hook or a clip or a clamp or a bracket. [6] System with at least two parallel fans (100), wherein at least between two of the parallel fans (10) a stiffening device (1) according to one of the preceding claims is provided, such that the stiffness of the fans (100) connected by the corresponding stiffening device (10) is increased. [7] System according to claim 6, wherein a plurality of parallel arranged fans (100) are provided, wherein at least one stiffening device (10) according to claims 1 to 5 is arranged between adjacent fans (100), [8] System according to claim 6 or 7, wherein the stiffening devices (10) are arranged parallel, preferably parallel to the longitudinal direction of the fans (100), and / or offset from each other in the longitudinal direction of the fans (100). [9] System according to claim 6 or 7, wherein the stiffening devices (10) are arranged in the longitudinal direction of the fans (100) alternately with a positive slope and a negative slope on adjacent fans (100). [10] System according to any one of the preceding claims 6 to 9, wherein at least on one fan (100) which is arranged at one end of a series of parallel fans (100) a stiffening device (10) according to any one of claims 1 to 5 is arranged, which is attached to a wall and / or a support and / or a mounting surface of the fans (100) by the second fastening element (3).

Images