JP4587802B2 - Hollow shaft pump - Google Patents

Description

  The present invention relates to a hollow shaft pump.

A conventional hollow shaft pump is configured such that a single liquid feeding member having a liquid feeding blade is integrally coupled to a suction cover and a discharge cover (see, for example, Patent Document 1). A conventional hollow shaft pump having a single liquid feeding member with a liquid feeding blade as described above cannot raise the lift and cannot function effectively in sludge agitation and pumping.
Japanese Patent Laid-Open No. 47-29903 (FIG. 1)

  The problem to be solved is to provide a hollow shaft pump that functions effectively in the agitation and lifting of sludge and that can raise the head.

  In the present invention, a plurality of liquid feeding structures are provided in series, each of which has a liquid transfer means provided on the inner peripheral surface of the hollow shaft that rotates backward from the front end when rotating with the shaft center of the rotor fitted in the stator as a hollow shaft. The suction cover is attached to the front surface of the liquid supply structure at the foremost end, and the suction port of the suction cover and the opening at the start end of the hollow shaft are electrically connected to each other on the rear surface of the liquid supply structure at the rearmost end. A discharge cover is provided to connect the discharge port of the discharge cover and the terminal opening of the hollow shaft, and a liquid supply blade is provided on the inner peripheral surface of the hollow shaft as a liquid transfer means in the liquid supply structure at the front end. The leading end of the liquid blade is extended into the suction cover to form the extended portion in the stirring blade, and the inner peripheral surface of the hollow shaft is configured as an all-pass aperture type as the liquid transfer means in the subsequent liquid supply structure. The most important feature.

  According to the hollow shaft pump of the present invention, the head can be increased by adopting a multistage configuration of the liquid feeding structure, and the tip of the liquid feeding blade in the front liquid feeding structure is guided into the suction cover. By forming the inner peripheral surface of the hollow shaft of the subsequent liquid feeding structure as a full-pass aperture type liquid transfer means, it is very effective for stirring and lifting the sludge.

  A plurality of liquid-feeding structures are arranged in series, each having a liquid transfer means provided on the inner peripheral surface of the hollow shaft, the liquid transfer means moving backward from the front end when rotating about the hollow shaft as the shaft center of the rotor fitted in the stator. A suction cover is attached to the front surface of the frontmost liquid-feeding structure so that the suction port of the suction cover and the opening of the hollow shaft are electrically connected, and a discharge cover is attached to the rear surface of the rearmost liquid-feeding structure. Then, the discharge port of the discharge cover and the terminal opening of the hollow shaft are electrically connected, and a liquid supply blade is provided on the inner peripheral surface of the hollow shaft as a liquid transfer means in the liquid supply structure at the front end, and the tip of the liquid supply blade The inside of the suction cover is formed into a stirring blade, and the hollow shaft inner peripheral surface is spirally bent as a liquid transfer means in the subsequent liquid supply structure. To do. Then, the stator end face and the opening end face of the hollow shaft in each liquid feed structure are configured to be substantially flush with each other so that each liquid feed structure, the suction cover, and the discharge cover are connected to each other by a fixing material so as to be assembled and divided. Constitute.

  In FIG. 1 and FIG. 4, 1A is a liquid feeding structure, and the front end at the time of rotation is provided by providing a liquid feeding blade on the inner peripheral surface of the rotor 2 fitted in the stator 2 as an axial center. The liquid transfer means 4a is formed so as to be directed rearward, and the leading end of the liquid supply blade is extended into the suction cover 11 described later to form the extended portion in the stirring blade 5. In FIG. 2 and FIG. 4, 1B is a liquid feed structure having a liquid transfer means different from the above, and the inner periphery of the rotor 2 fitted in the stator 2 is a hollow shaft 3 and the inner peripheral surface thereof is, for example, spiral. By constructing into an all-pass aperture type that is bent in the shape, the liquid transfer means 4b that faces backward from the entire end when rotating is provided. In FIGS. 1 and 2, 6 is a stator coil, 7 is a rotor coil, 8 is a bearing, 9 is a sealing material, and 10 is a top plate. In FIG. 4, reference numeral 11 denotes a suction cover, which is provided with a suction port 12 that leads to the opening at the start end of the hollow shaft 3. In FIGS. 3 and 4, reference numeral 13 denotes a discharge cover, and a discharge port 14 leading to the terminal opening of the hollow shaft 3 is opened. FIG. 4 shows a liquid feed structure 1A having an excellent stirring function at the foremost end, and liquid feed structures 1B and 1B having an excellent passing pressure feed function are connected in series in a multi-stage, and the liquid feed at the foremost end. A state is shown in which the suction cover 11 is brought into contact with the front surface of the structure 1A and the discharge cover 13 is brought into contact with the rear surface of the liquid supply structure 1B at the rearmost end. With this configuration, the number of rotations can be varied for each liquid feed structure, so that the liquid feed structure 1A at the foremost end is rotated at a low speed mainly for stirring, and the subsequent liquid feed structures 1B and 1B are used for passing pressure. By using a suitable high speed rotation, it functions extremely effectively for sludge agitation.

  Assuming the configuration of the first embodiment, the end surfaces of the stators 2 and the open end surfaces of the hollow shafts 3 of the liquid feeding structures 1A and 1B are substantially flush with each other. Slightly shorter and smaller. The liquid feeding structures 1A and 1B, the suction cover 11 and the discharge cover 13 are connected by a fixing material 15 so as to be freely assembled and disassembled. As a result, the liquid feeding structures 1A and 1B can be freely rearranged and the number of connections can be increased or decreased.

It is a vertical side view of the liquid feeding structure in the hollow shaft pump of the present invention, and shows an example provided with a liquid transfer means comprising a liquid feeding blade and a stirring blade. It is a vertical side view of the liquid feeding structure in the hollow shaft pump of the present invention, and shows an example provided with an all-pass-diameter liquid transfer means that is spirally bent. It is a top view of this invention hollow shaft pump. It is a vertical side view of the hollow shaft pump of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1A Liquid feeding structure 1B Liquid feeding structure 2 Stator 3 Hollow shaft 4a Liquid transfer means 4b Liquid transfer means 5 Stirring blade 11 Suction cover 12 Suction port 13 Ejection cover 14 Ejection port 15 Fixing material

Claims (3)

  A plurality of liquid-feeding structures are arranged in series, each having a liquid transfer means provided on the inner peripheral surface of the hollow shaft, the liquid transfer means moving backward from the front end when rotating about the hollow shaft as the shaft center of the rotor fitted in the stator. A suction cover is attached to the front surface of the frontmost liquid-feeding structure so that the suction port of the suction cover and the opening of the hollow shaft are electrically connected, and a discharge cover is attached to the rear surface of the rearmost liquid-feeding structure. Then, the discharge port of the discharge cover and the terminal opening of the hollow shaft are electrically connected, and a liquid supply blade is provided on the inner peripheral surface of the hollow shaft as a liquid transfer means in the liquid supply structure at the front end, and the tip of the liquid supply blade In the suction cover, the extending portion is formed in the stirring blade, and the inner peripheral surface of the hollow shaft is configured as an all-pass aperture type as the liquid transfer means in the subsequent liquid-feeding structure. Hollow shaft pump.   2. The hollow shaft pump according to claim 1, wherein each of the liquid feeding structures, the suction cover, and the discharge cover are connected by a fixing material so as to be assembled and divided.   The hollow shaft pump according to claim 1 or 2, wherein a stator end surface and an open end surface of the hollow shaft in each liquid feeding structure are substantially flush with each other.

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