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
  • F04D23/00—Other rotary non-positive-displacement pumps
  • F04D23/001—Pumps adapted for conveying materials or for handling specific elastic fluids
  • F04D23/003—Pumps adapted for conveying materials or for handling specific elastic fluids of radial-flow type
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D25/00—Pumping installations or systems
  • F04D25/02—Units comprising pumps and their driving means

Definitions

• blowers In particular in the woodworking industry, blowers are used which extract chips, dust and sawdust generated at work at the workplace and convey them via separators in silos. Often, several suction devices are connected to one blower. Before the air, shavings and / or shegemehlgemir.ch is passed through the actual blower, it passes through a separator in which larger and in particular heavy parts are separated out by gravity.
• the present invention relates to a blower for converting air or for conveying bulk material, with a fan wheel, a drive motor and an intake pipe.
• Blowers of this type are known. They work as a centrifugal fan in that the sucked-in air or the sucked-in mixture enters the fan in the axial direction with respect to the fan axis, is deflected there and accelerated in the radial direction, after which the Air or the bulk material carried in it is thrown out of the blower in the tangential direction and conveyed onward.
• blowers have been in operation for many years, especially as transport blowers for hay, for example, but also in the woodworking industry.
• a second disadvantageous point of such centrifugal blowers is that any large, solid parts which were not separated out by the separator are enormously accelerated radially and tangentially therein after entering the blower and subsequently hit the wall of the outlet pipe like a bullet.
• the abrasive effect of the impact leads to severe wear of the material and even deformation of the wall in older installations. In the most extreme case, it even leads to perforations in the wall.
• a blower which works like a radial fan and avoids the aforementioned disadvantages.
• This problem is solved by a blower according to the preamble of claim 1, which is characterized in that the suction pipe in front of the fan wheel is branched into two separate pipes, which together have a cross-sectional area which corresponds at least to the cross section of the suction pipe before the branching, and that the branched pipes open into the larger opening of a common cone, the fan wheel being arranged on the output side in front of the cone, and that the drive shaft of the fan wheel is guided in the axial direction towards the cone outwards into the area between the two branched pipes and from outside the drive motor located is driven.
• It is the merit of the present invention to provide a fan which is hardly prone to clogging and is therefore extremely maintenance-friendly.
• An example of the blower according to the invention is shown in simplified form in the drawings and is explained on the basis of the following description.
• Figure 1 An overall view of the blower in elevation;
• Figure 2 shows a section along the line A-A in Figure 1;
• Figure 3 a view of the fan in Figure 1 from above in plan and partially in section along the line B-B in Figure 1;
• Figure 4 the fan wheel;
• FIG. 5 the blower with associated distributor bell.
• a blower for converting air or for conveying bulk material is understood to mean the entire system, which comprises at least one suction pipe, a blower with drive motor and fan wheel, and possibly a blowing or delivery pipe.
• the suction pipe which leads from the suction point or into the area of the actual fan, is designated by 1.
• the intake pipe 1 branches into two separate pipes 2. Both pipes each form an arc, which, however, can also be composed of straight pipe sections.
• the two pipes reunite by opening into the larger opening of a cone 4.
• the cone 4 then opens into the housing of the fan, which in turn can open into a blowing or delivery pipe.
• the fan wheel 8 can, however, also be open, that is to say not be enclosed in a housing, as is shown in FIG. 1.
• the fan wheel 8 is now driven by means of a drive shaft 5, which is guided outwards in the axial direction against the cone into the region 7 between the two branched tubes 2.
• the drive shaft 5 passes through the mounting plate 11, in which it is held and supported by means of a bearing tube 3.
• this bearing tube 3 is again supported between the tubes 2 and the shaft 5 is equipped with toothed belt or V-belt wheels 6.
• the bearing tube which can be extended upwards is in turn held with the brackets 16 and 17 on the mounting plate 11 or on the two tubes 2.
• a suitable drive motor which can be mounted some distance from the fan, drives the Shaft 5 via toothed belt or V-belt.
• this motor can also be arranged directly between the two branched tubes 2, from where it drives the drive shaft 5 directly or via a belt or gear transmission.
• the blower can also have a motor platform 15 over the branching of the intake pipe 1, which is fixedly mounted there and can support the motor.
• a blower of this type is particularly suitable for the transport of bulk goods that have to be introduced from above into a silo, for example.
• the same arrangement as shown in Figure 1 is also advantageously used as a transport blower for the disposal of sawdust, wood shavings and the like material from workshops in the woodworking industry or from the woodworking industry. So far, silo systems have already been used for such disposal.
• Such a silo has an accessible floor 10 in the upper area.
• the pipe by means of which the wood waste is fed to the silo, leads through this intermediate floor 10 into the actual interior of the silo.
• the intermediate floor 10 also has further openings, each of which has a filter bag sealing are attached with their opening towards the bottom. The bottom of these filter bags is suspended from the top.
• Another pipe leads from the space above the intermediate floor 10 of the silo back to the workshop.
• the efficient operation of such a waste disposal system now requires a powerful fan, which ensures the necessary air turnover.
• the air heated in the workshop in the winter half-year is sucked in together with the wood waste and pumped into the interior of the silo.
• the blower shown in Figure 1 is particularly suitable for the device just described. For this purpose, it is inserted into the recess in the intermediate floor 10 in the vertical conveying direction. In the area of the two separate tubes 2, it is provided with a mounting plate 11 which is screwed firmly onto the intermediate floor 10 and in which the holder 16 of the bearing tube 3 is also mounted. Struts 12 are provided between the mounting plate 11 and the tubes 2 for reinforcement. This ensures that the entire fan has a secure hold on the mounting plate 11 finds.
• a special vibration and vibration can be inserted between the mounting plate 11 and the intermediate floor 10 as an absorbent sealing material.
• the fan wheel 8 is openly mounted on the drive shaft 5. The from above on the drive shaft 5. The material arriving from above and sucked in by the fan wheel 8 is thrown radially away from the fan axis by the rotation of the blades 8, so that the silo is filled evenly.
• a flange 13 is arranged in the conveying direction in front of the fan wheel 8, which flange forms a fixed fan wall to the fan wheel 8 and is fastened to the cone 4 by means of the flange struts 14.
• This flange also serves as a connection element for any blow or delivery pipe which is to be connected to the blower. This is particularly necessary when the air or any bulk material is to be conveyed further by the blower.
• FIG. 2 shows the fan described in section along the line AA of Figure 1. It can be seen how the drive shaft 5 is mounted in a tube, which in turn is connected to the pipe holder 16 with the pipes 2. The motor platform 15 above the branching of the intake pipe 1 can also be seen again.
• FIG. 3 finally shows the fan according to the invention in plan view, which shows an arrangement of the struts 12, for example.
• the fan wheel 8 is covered on the side remote from the cone 4 with a disk 9, which acts as a centrifugal disk.
• the blower according to the invention can not only be installed vertically, as shown in FIG. 1, but also a horizontal or inclined installation position is conceivable, especially if it is only intended to convert air. Such an application is primarily intended for the ventilation of street tunnels.
• a blower with the features essential to the invention brings an increased air conversion with the same engine power. Furthermore, the conveying performance of bulk material is better in comparison to centrifugal blowers. Damage to the housing is also impossible because the. transported goods are not forced to change direction abruptly. Across from Centrifugal blowers also have no material deposits or even blockages from the material being conveyed.
• the solid parts are distributed more evenly in the silo room because the discharge takes place in all directions by 360 °.
• a swirling device is therefore superfluous.
• the fan wheel thus acts like a centrifugal disc with regard to the solids.
• a distribution bell 18 is advantageously mounted on the intermediate silo floor 10 by means of a tube 20 welded to its upper opening 19.
• the conveying fan can then be removed for inspection work independently of the distributor bell 18.
• the distributor bell 18 shields the fan wheel 8 from the silo room. With the fan wheel 8 running, the material to be conveyed is thrown against the inner wall of the distributor bell 18. Due to the rotation of the fan wheel 8, a circulating flow is simultaneously superimposed on the conveyed air, so that the air within the bell 18 spirals downward moved down. The extracted solids are actively dragged down.
• the material to be conveyed would only be accelerated radially outwards and would only fall down due to gravity.
• the dust density near the filters would be too great, so that they would dust up too soon.
• the distributor bell 18 With the distributor bell 18, however, the material to be conveyed in the silo room is accelerated downwards. The air blown down is redirected before the filling level of the silo, whereby the carried parts are deposited. The air then rises again in the outer area of the silo interior and flows outside around the distributor bell 18 to the filter bags.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)
• Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
• Air Transport Of Granular Materials (AREA)
• Separating Particles In Gases By Inertia (AREA)
• Cyclones (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=4190339

Family Applications (1)

Country Status (5)

Families Citing this family (5)

Citations (3)

Family Cites Families (12)

• 1987
  • 1987-02-17 CH CH582/87A patent/CH671753A5/de not_active IP Right Cessation
• 1988
  • 1988-02-16 EP EP88901531A patent/EP0303641B1/de not_active Expired - Lifetime
  • 1988-02-16 US US07/279,154 patent/US4883406A/en not_active Expired - Fee Related
  • 1988-02-16 WO PCT/CH1988/000037 patent/WO1988006240A1/de active IP Right Grant
  • 1988-02-16 JP JP63501422A patent/JPH03500560A/ja active Pending

Patent Citations (3)

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