Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
  • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
  • F04D29/662—Balancing of rotors
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/26—Rotors specially for elastic fluids
  • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/26—Rotors specially for elastic fluids
  • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
  • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing

Definitions

• the present invention relates to a fan for a fan module according to the features of the preambles of claims 1 and 6.
• blower modules are known from a wide variety of industrial applications, for example, they are used for ventilation of various technical devices or for guiding the air flow when used in air conditioning systems of motor vehicles.
• the fans of the fan modules are balanced after assembly.
• an additive or positive balancing is performed, in which balancing weights, e.g. in the form of (balancing) brackets are attached to the fan.
• the balance weights are fixed by spring and frictional engagement in the selected position.
• the balancing weights are fastened exclusively on the (center) side of the fan blade facing the fan center, where they are secured against the radially acting centrifugal forces by positive engagement.
• the object of the invention is to fan and / or the balance weights in such a way that a permanent, easily accessible from the outside attachment of the balance weights is ensured and at the same time a high quality of compensation is guaranteed.
• the balance weights are arranged at the end of the radially aligned fan blades.
• the or the balance weight is thus positioned at the maximum fan diameter, so that the distance of the balance weight of the rotary or central axis of the fan is located farther away.
• the weight of the compensation elements can be chosen smaller. This positioning also makes it possible to still easily access the area in which the balancing weights must be mounted for balancing even after the fan has been mounted. Handling is easier for the operator and the risk of the balance weight accidentally getting into the fan module during assembly and causing subsequent errors there is less.
• the balance weights are advantageously designed as (balancing) brackets and positively and / or non-positively attached to the ends of the fan blades.
• the (balancing) brackets usually consist of steel. In principle, however, other spring materials which should have the highest possible density so that the volume can be kept correspondingly small can also be used with this compensation method.
• the (balancing) staples differ in size in order to provide the operator with a choice of different balancing weights. Furthermore, different shapes can be used.
• the (balancing) clamp is adapted to the shape of the fan blade, on the other hand, it is endeavored to improve by a suitable design of the (balancing) clamp the form or frictional engagement.
• grooves are provided in which the (balancing) clamps engage positively with their clamping edges.
• the (balancing) brackets are secured against axial ejection in addition to the frictional engagement by appropriate positive engagement.
• the grooves provide for always the same axial positioning of the (balancing) clamps, which supports a uniform quality of the moment compensation, since the
• the radially oriented fan blades form a fan ring, which is constructed alternately from short and long fan blades, wherein the (balancing) brackets or the grooves for the (balancing) brackets are arranged or introduced at the radial end of the fan blades.
• the balancing braces are preferably arranged on the long fan blades, since they are stiffer than the short fan blades and thus less excited to vibrate.
• the fan is preferably produced by injection molding, wherein the grooves can be removed from the mold in an advantageous manner without additional effort in the injection mold.
• the fan is part of a fan module, which with one of a
• Electric motor existing drive unit is connected.
• the fan is rotatably connected to a drive shaft of the electric motor.
• FIG. 1 shows a first perspective view of a blower module
• FIG. 2 shows a second (partial) view of the blower module
• FIG. 3 is a first perspective view of a fan wheel
• FIG. 4 shows a second perspective view of the fan wheel
• FIG. 5 shows an enlarged partial section of the fan wheel with a compensating element attached to a fan blade
• Figure 6 is an enlarged view of the attached to a fan blade balance weight.
• the fan module 2 shown in Figure 1 consists of a base housing 4, on which a fan 6 is rotatably mounted on a drive shaft 7. The fan 6 is in turn secured with its hub 5 on the drive shaft 7.
• the (radial) fan 6 has on its outer end face to an axial fan 8, which is constructed of curved fan blades 9 running.
• the (radial) fan 6 further has a radial fan ring 10, which is also constructed of curved fan blades, hereinafter referred to as radial fan blades 12, constructed.
• the radial fan rim 10 has two different types of fan blades 12.
• a first group consists of long, leading to the hub 5 zoom fan blades, hereinafter referred to as long fan blades 14, while a second group of short fan blades 16 which seen from the outer diameter of the radial fan ring 10, only partially extend in the direction of rotation. Both groups of fan blades 14, 16 are alternately formed on the (radial) fan wheel 6. The operation of such a radial fan is known and will therefore not be explained in detail. It is essential that the air is sucked in via the axial fan ring 8, deflected by 90 °, compressed and then blown out via the radial fan ring 10.
• a clamping element serving as a balance weight hereinafter referred to as balancing clamp 18, attached or attached after mounting the fan module 2 if necessary at an outer radial ends of a long fan blade 14.
• grooves 20 and 22 running parallel to the axis of rotation of the fan wheel 6 are provided on the inside and outside of the long fan blades.
• the clamping edges of the balancing bracket can intervene in a form-fitting manner, as can be seen, for example, from FIG. This ensures that despite high fan speeds, the balance clamp 18 is securely fastened to the fan blade 14.
• the length of the grooves 20, 22 coincides substantially with the width of the balancing braces 18, so that lateral slippage of the balancing brackets 18 is prevented.
• the balancing takes place as follows.
• the blower module 2 is clamped in the finished assembled state in a measuring device.
• the rotor i. the armature of the motor and the fan 6 is set in rotation by turning on the motor.
• Suitable sensors are used to record the dynamic forces in the given measurement levels and to display the respective imbalance to the operator in terms of amount and angle.
• the measuring device calculates from this the required balance mass and the compensation angle and indicates this to the operator accordingly.
• the operator attaches according to the display (including his experience) the balancing brackets 18 on the corresponding fan blade 14 and then starts a control measurement.
• the fan module 2 is balanced in two planes as far apart as possible. This is the only way to ensure that, on the one hand, the static balance and the torque compensation are improved, with the second plane in the case of this fan being in the range indicated by reference numeral 9 in FIG.
• the number of balancing brackets 18 required depends on the amount and angular position of the measured imbalance. Ideally, the balancing can already be achieved with a maximum of two balancing clamps, i. one balancing bracket per level. In practice, two or three balancers may be at different
• Positions per level are set to achieve a satisfactory result. Per fan blade 14 but a maximum of only one balancing clamp 18 should be attached. Therefore, as shown in FIG. 6, the length of the groove 20, 22 is matched to the width of the balancing clamp 18.
• the attachment of the balancing weights according to the invention can also be used with other fan types, for example, those which have only one group of fan blades.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=42224800

Family Applications (1)

Country Status (6)

Families Citing this family (8)

Family Cites Families (10)

• 2009
  • 2009-04-16 DE DE102009002418A patent/DE102009002418A1/de not_active Withdrawn
• 2010
  • 2010-03-25 KR KR1020117024161A patent/KR20120012794A/ko not_active Application Discontinuation
  • 2010-03-25 CN CN2010800167283A patent/CN102395796A/zh active Pending
  • 2010-03-25 WO PCT/EP2010/053926 patent/WO2010118942A1/de active Application Filing
  • 2010-03-25 US US13/264,791 patent/US20120093650A1/en not_active Abandoned
  • 2010-03-25 EP EP10712398A patent/EP2419645A1/de not_active Withdrawn

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events