JPS59200092A - Pump - Google Patents

Abstract

PURPOSE:To provide a pump capacity same as with a conventional large-scale pump and thereby to largely reduce cost, by forming two pump sections including two pump rotors with respect to one stator so as to make a pump capacity double with a single pump. CONSTITUTION:A pump P1 comprises an electric motor section 1 at a central portion thereof and a first and second pump sections 2A and 2B on both sides thereof. The electric motor section 1 includes an intermediate casing 3 partitioning two rotors 6A and 6B from a stator 4. Namely, the pump P1 is constituted of a motor casing 1a, one electric motor stator 4 accommodated in the casing 1a, two electric motor rotors 6A and 6B, first and second pump rotors 5A and 5B consisting of the rotors 6A and 6B and impellers 8A and 8B fixed to the rotors 6A and 6B, and pump casings 14A and 14B. In this way, as two pump sections 2A and 2B are formed by providing two pump rotors 5A and 5B with respect to one stator 4, a pump capacity may be made double with a single pump to largely reduce cost.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a pump in which a pump part and a motor part are integrally coupled.

<Prior Art> In recent years, pumps in which a pump part and a motor part are integrally combined have been widely used. However, the conventional pump, as shown in FIG. 1, has a motor casing 21a and a motor casing 21. One electric motor stator 24 installed in a, one electric motor rotor 25 arranged corresponding to the - stators 24, and the rotor 25 and the stator 24 are partitioned. Intermediate casing 2 made of non-magnetic material formed as follows.
3, the rotor 25 and the pump impeller 2 fixed thereto.
8 and a pump casing 34 formed to cover the impeller 28. That is, in the conventional pump p, one rotor 25 is attached to - stators 24 so as to be rotatable by induction, and an impeller 28 is attached to the shaft end of the rotor 25 that protrudes toward the pump side.
However, if one pump section 22 is provided for - motor sections 21, it functions as only - pumps.

In addition, 27 is a rotating shaft, 29 is a suction port, 30 is a discharge port, 3
1 is a bearing.

And the solar heat collector using this pump p is the second
It is configured as shown in Figure (a). That is, heat collector a,
M heat tank I], heat exchanger C1 water replenishment tank d, heat medium main circulation path e, heat medium circulation pump p, hot water supply circuit r, etc. The circulation pump 1] supplies fluid such as water to the suction port 2.
Inhale through the outlet 9 and exhale through the outlet 30. In preparation for the occurrence of air pockets in the heat medium circulation path e, a pump p with a large output to overcome the piping loss of the heat medium circulation path e and the lift up to the heat collector a is installed. are using.

For this reason, the pump has become larger and its power consumption has also increased. Note that once the heat medium is filled in the heat medium circulation path e, the output of the heat medium circulation pump p is only required to overcome the piping loss in the heat medium circulation path e, etc. However, if an air pocket or the like occurs in the heat medium circulation path e and the heat medium falls into the water replenishment tank d, in order to circulate the heat medium in the heat medium circulation path e again, the heat must be collected in the piping loss pond. The lifting height at the main part of the vessel is required.

In addition, in the solar heat collection device using the conventional external heat exchanger C shown in Fig. 2 1), the heat collection medium circulation pump p,
Two pumps, the heat medium circulation pump p2, having the same structure as this, were required.

Furthermore, as shown in FIG. 2(c), there are cases where a hot water supply pump p3 having the same structure as the heat collecting pump p is required in the hot water supply circuit f.

In this way, in the past, one pump was equivalent to only one working mackerel, so if a large capacity was required, the pump had to be made larger or two pumps had to be installed. In either case, they had the disadvantage of being expensive.

<Purpose> Therefore, the present invention provides a pump in which two pump rotors are provided for - stators to form two pump parts, and the - pieces can perform the work of two pumps. This is what I am trying to do.

<Example> Embodiments of the present invention will be described below based on the drawings.

FIG. 3 shows a first embodiment of the invention, in which the pump P
1 includes an induction motor type electric motor section 1 in the center, a first pump section 2A on the right side, and a second pump section 2 on the left side.
B It has a hole. Reference numeral 3 denotes an intermediate casing made of a non-magnetic material, which is formed to partition the two rotors 6A, 6B watertightly from each other and from the stator 4 in a watertight manner. And the pump P1 has a motor casing 1. a, one electric motor stator 4 housed in the motor casing 1a, and two electric motor rotors 6A, 6B disposed close to the - stators 4 and facing each other. , first and second pump rotors 5 each consisting of the respective rotors 6A, 6B and pump impellers 8A, 8B fixed thereto, respectively.
A, 5B, and pump casings i 4 A, 14 B formed so as to cover the respective impellers 8A, 8B.

The pump rotor 5A can be removed by removing the pump casings 14A and 14B, which are bolted to the 7-run section of the intermediate casing 3.

5B is said to be removable. A squirrel-cage stator 4 is housed inside the motor casing 1a of the induction motor section 1, and one of the first and second cages faces the stator 4 having a rotating magnetic field winding via the intermediate casing 3. Pump rotors 5A and 5B having second rotors 6A and 6B are rotatably installed. The intermediate casing 3 is made of a thin non-magnetic material such as synthetic resin and is formed into a cylindrical shape with seven flanges, and has a partition plate 3a in the center. Shaped bodies 3A and 3B are formed. The first and second pump rotors 5A and 5B are respectively a cylindrical induction morph rotor 6A,
6B, and centrifugal pump impellers 8A, 8B, and the outer peripheries of these impellers 8A, 8B and rotors 6A, 6B are integrally molded with resin. A rotating shaft 7A fixed through the rotors 5A and 5B,
7B, and both ends of the respective shafts are supported by bearings 11 and 12, and the bearings 12 are radial shaft supports protruding from the peripheral walls of the suction ports 9A and 9B of the pump casings i4A and 14B. 12a, and the bearing 11 is supported by the bottom of the bottomed cylindrical books 3A and 3B. In addition, impellers 8A and 8B are installed in the pump casings 14A and 14B, respectively.
Suction ports 9A and 9B for sucking in fluid such as water and discharge ports 10A and 10B for discharging fluid are formed. 15 is the pump casing 14~.

1413 and the intermediate casing 3 in a watertight manner.

Further, 16 indicated by a phantom line in the figure is a check valve made of soft synthetic resin or rubber provided at the suction port 9B of the second pump section 2B.
works as a self-priming pump.

FIG. 4 shows a pump P2 according to a second embodiment of the present invention, which is similar to the pump according to the first embodiment shown in FIG.
is omitted, and its bearing function is formed in the gap 13 between the inner peripheral surface 31 of the bottomed cylindrical body 3A, 3B of the intermediate casing 3 and the outer periphery 1Ti5C of the pump rotor 5A, 5B. The fluid film is configured to perform this. The configuration of the pond portion is the same as that of the first embodiment.

Next, FIG. 5 shows a pump section 3 according to a third embodiment of the present invention, which includes an induction motor stator 4 in the center and first and second pump rotors 5A and 5B on the left and right sides, respectively. It is arranged in the axial direction. The stator 4 is shaped like a donut and is arranged at the center of the cylindrical motor casing 1a, and bottomed cylindrical bodies 3A and 3B are arranged on both sides of the stator 4, thereby forming an intermediate casing 3. There is. In addition, the two rotors 6A and f3B are disk-shaped, and their outer peripheral parts and impellers 8A and 8B are integrally molded from synthetic resin to form pump rotors 5A and 5B. , are opposed to the stator 4 via the bottomed cylindrical bodies 3A and 3B. The configuration of the pond portion is the same as that of the first embodiment. This again.

According to the third embodiment, a small pump P3 with a narrow width can be obtained.

As described above, the pumps P1°P2. of the first, second and third embodiments.
In P3, for - pump stator 4, -C = number, 5 rotors 5A, 5B, installation t'>h
Since there are two pump parts 2A and 2B, two pump parts 2A and 2B are formed, and the - part performs the function of two pump parts. Then, the two pump parts 2A, 2 are connected by the intermediate casing 3.
Since B is watertightly partitioned, there are two pump parts 2A.

``Fluids do not mix with each other between 2B. In addition, since the two pump rotors 5A and 5B are configured independently, even if one of the pump rotors 5A and 5B is loaded and its rotational speed decreases, the Ikekata pump rotors 5A and 5B will continue to operate. It will not be affected by it. In other words, the two pump rotors 5A and 5B rotate at their own rotation speeds depending on the load of each pump section, and the two pump rotors 2A and
2B operates efficiently.

In the above embodiment, the squirrel-cage induction motor rotors 6A and 6B were described, but the rotors 6A and
A permanent magnet may be used as the rotor 6B.
, 6B and the pump impellers 8A, 8B are not integrally molded, but are connected and fixed to each other only by the rotating shafts 7A, 7B, and the impeller 8A-8
Only B may be watertightly covered with pump casings 14A and 14B.

Furthermore, although a case has been described in which one pump impeller 8A, 8B is provided for each - number of pump rotors 5A, 5B,
It is also possible to have a two-stage impeller.

Next, as a particularly effective application of the pump of the present invention, an example in which it is used in a solar heat collector will be described.

The solar heat collector of the first usage example shown in FIG. 6(a) includes a heat collector a, a heat storage tank b, a heat exchanger C1, a water replenishment tank d, a heat medium circulation path e, a heat medium circulation pump p, and a hot water supply. It is composed of circuit r and the like. Pump Pi (with check valve 16) according to the first embodiment of the present invention is used as the pump. That is, the suction ports 9A, 9B and the discharge port 10A of the pump P1
, IOB is connected before and after the replenishment tank d of the heat medium circulation path e, the stator 4 of the induction motor section 1 is connected to an AC power source, and the second pump section 2B on the heat exchanger C side is a self-priming pump. In addition, the first pump section 2A works in the same manner as a conventional pump. As a result, if the heat medium in the heat medium circulation path e falls into the refilling tank d, the suction pump section 2B and the discharge pump section 2A in the sealed heat medium circulation path e.
Since both act independently and at the same time, it is possible to circulate the heat medium in the heat medium circulation path e with a pump with a smaller output compared to conventional pumps, resulting in significant energy savings.

Note that the air that is sucked in from the heat medium circulation path C at the same time as the heat medium on the self-priming pump section 2B side is released to the atmosphere in the water replenishment tank d.

The second usage example shown in FIG. 6(1)) uses an external heat exchanger C, and the pumps include the pumps Pi, P2, and P2 of the first, second, and third embodiments. One of P3 is used, and the first and second pump parts 2A and 2B of this pump are connected to the heat medium circulation path e and the hot water supply circuit f, respectively.

In addition, in FIG. 6(c), the pump P1 of the present invention, instead of the heat collecting pump p and hot water supply pump 1)3 in FIG.
P2. P3 is used, and the first and second pump parts 2A and 2B of this pump are connected to the heat medium circulation path e and the hot water supply circuit f, respectively. g is a solenoid valve.

<Effects> As is clear from the above description, the present invention includes a motor casing, an electric motor stator housed in the motor casing, and a motor casing arranged adjacent to and facing each other. a pair of pump rotors consisting of two electric motor rotors, each rotor and a pump impeller fixed to each rotor, and a pump casing formed to cover each of the impellers. It was constructed and constructed.

Therefore, if the pump of the present invention is used in a fluid circuit,
Since it performs the same function as one conventional large pump or two pumps, it is possible to significantly reduce costs and save energy.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of a conventional pump, Figures 2 (a) and (b)
, (C) are circuit diagrams of solar heat collectors using conventional pumps, Figures 3.4.5 are longitudinal cross-sectional views of the first, second, and third embodiments of the pump of the present invention, respectively, and Figure 6 (a), (b), (
C) is a circuit diagram of a solar heat collector using the pump of the present invention. Pl: pump, 1: motor section, 1a: motor casing, 2A: first pump section, 2B: second pump section, 3: intermediate casing, 4: stator, 5 A, 5 B: pump rotor, 6 A , 6 B: rotor, 7 A, 7 B:
Rotating shaft, 8A, 8B: Pump impeller, 14A, 14B:
pump casing. Applicant Sharp Corporation Agent Tsunehisa Nakamura Figure 2 (a) Figure 2 (c) Figure 5 Figure 6 (a)

Claims (1)

[Claims] a motor casing (1a);
one electric motor stator (4) installed in a), and two electric morph rotors (6A, 6B) disposed close to and facing each other in the stator (4); , a pair of pump rotors (5A', 5B) consisting of the respective rotors (6A, 6B) and pump impellers (8A, 8B) fixed to these rotors (6A, 6B), respectively; (8A, 8B)
The pump casing (14A, 1
4B).