JPS5925544A - Noncontact bearing generator - Google Patents

Abstract

PURPOSE:To improve energy conversion efficiency by constituting one end surface of a case encasing a stator coil by a magnetic induction plate, to which a plurality of slits are formed, and supporting a rotary pole plate against the magnetic induction plate apart from the case. CONSTITUTION:A shaft 6 is disposed into a heat pipe 1, a blade 7 is set up tightly to the nose section 6a of the shaft while the shaft is supported rotatably to a support leg 8 set up tightly on the inside of an end wall 5, and the end wall 5 is extended to the outside while being penetrated in the axial direction. The ring-shaped stator coil 12 is encased in the case 11 of the generator 10, and one end surface of the case 11 is constituted by the magnetic induction plate 14 to which a plurality of the slits 14a are bored. On the other hand, the rotary magnetic pole plate 15 to which a ring-shaped permanent magnet 16 is pasted and set up is fixed at the end section of the shaft 6 while being opposed to the magnetic induction plate 14 and separated from the plate 14.

Description

[Detailed description of the invention] The present invention relates to a small non-contact bearing generator.

In general, a generator converts mechanical energy into electric energy by rotating a rotor having a fixed armature inside a casing containing a field winding.

In other words, in a generator like this, the rotor is rotatably supported via a bearing, so mechanical energy loss due to the frictional resistance that acts between the rotor and the bearing inevitably occurs. For this reason, there is a problem that the Ni-Lugi conversion efficiency decreases. Particularly in the case of small-capacity generators, the mechanical losses account for a large proportion of the conversion loss and energy loss, and improvements are desired.

The present invention has been made to solve the above-mentioned problems, especially in small-sized generators. The energy conversion efficiency is improved by constructing a magnetic induction plate with slits formed therein, and supporting a rotating magnetic pole plate independently of the case, facing the magnetic induction plate and spaced apart from it. is to provide high-quality non-contact bearing generators.

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a longitudinal sectional side view of a generator connected to a heat pipe turbine, FIG. 2 is a sectional view taken along line 2-2 in FIG. 1, and FIG. 3 is a sectional view taken along line 3-3 in FIG.

The heat pipe 1 includes a cylindrical case 2 and an inner circumferential wall 2a of the case 2.
The case 20 is made up of a microporous body 3 called a wick attached to the case 20, and the front and rear of the case 20 are closed and sealed by rear walls 4 and 5.

An axially long linear space S having a circular cross section is formed between the inner diameter portions 3a of the wick 3, and both ends of the space S in the axial direction are closed by end walls 4 and 5. And this wick 3
is impregnated with a liquid, a required part on one end in the axial direction is made into a heating evaporation part A, an intermediate part downstream of this is made into a heat insulating part B, and the other end downstream of this is made into a cooling condensing part C.

A shaft 6 is disposed in the axial direction in the heat pipe 1 described above, and the shaft tip 6a faces near the downstream of the heat insulating section B.
The blades 7, 7 are fixedly installed. Furthermore, this shaft 6 is a cooling condensing section C.
It passes through the side end wall 5 in the axial direction and extends outward, and is rotatably supported by a support leg 8 fixed inside the end wall 5 (
・Ru.

A generator 1o is provided in a portion of the shaft 60 extending outside the case 2 so as to pass through it.

In the generator 10, a case 11 has a ring-shaped space inside, and a ring-shaped stator coil 12 is housed inside the case, and a lead wire 13 is led out from the coil 12. There is. One end surface of the case 11 is constituted by a magnetic induction plate 14 having a plurality of holes 14a... as shown in FIG.

On the other hand, a rotating magnetic pole plate 15 is fixed to the end of the shaft 6 opposite to and spaced apart from the magnetic induction plate 14 , and the surface of the rotating magnetic pole plate 15 facing the magnetic induction plate 14 is fixed to the end of the shaft 6 . As shown in FIG. 3, a ring-shaped permanent magnet 16 is attached.

Both shafts 6 rotate independently of the housing 11, ie without being supported by the housing 11, and no contact occurs between the two shafts 6.11.

By heating the heating evaporation section A of the heat pipe 1, the liquid impregnated in the wick 3 evaporates, flows in the axial direction toward the condensation section C, is cooled in the condensation section C, and is condensed once to form the wick 3. It passes through the heat insulating part B by capillary action and evaporates in the evaporation part A, and the same cycle is repeated thereafter.

The axial steam flow generated in the heat vip 1 during the above cycle causes the blades 7.7 to rotate, thereby rotationally driving the shaft 6 which integrally supports these blades 7.7. By 60 rotations of this shaft, the rotating magnetic pole plate 15 fixed to the end of the shaft also rotates together, and by 150 rotations of this rotating magnetic pole plate, the stator coil 12
The magnetic induction plate 14 is operated to cut off the lines of magnetic force of the permanent magnet 16, and the required electromotive force is induced in the coil 12.

In the above, since the generator 10 does not have a bearing that supports the shaft 6, there is no mechanical energy loss due to sliding contact between the shaft 6 and the bearing, and therefore the energy conversion efficiency of the generator 10 is increased.

Although the example above specifically uses the heat pipe 1 as the prime mover for driving the shaft 6, any other type of prime mover may be used as the prime mover for driving the shaft 6.

As is clear from the above description, according to the present invention, a stator coil is housed in a case, and one end surface of the case is constituted by a magnetic induction plate having a plurality of slits. Since the rotating magnetic pole plate is independently supported opposite to and apart from the case without intervening a bearing between the rotating magnetic pole plate and the case, mechanical energy loss can be eliminated and the energy conversion efficiency of the generator can be increased.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal sectional side view of a generator connected to a heat pipe turbine;
Figure 2 is a sectional view taken along the line 2-2 in Figure 1, Figure 3 is a sectional view taken along the line 3-3 in Figure 1.
FIG. In the drawing, 1 is a heat pipe, 6 is a shaft, 10 is a generator, 1
1 is a case, 12 is a stator coil, 14 is a magnetic induction plate,
15 is a rotating magnetic pole plate, and 16 is a permanent magnet. Patent applicant Honda Motor Co., Ltd.

Claims (1)

[Claims] A stator coil is housed in a case, and one end surface of the case is composed of a magnetic induction plate with a plurality of slits, and a rotating magnetic pole is arranged opposite to and spaced apart from the magnetic induction plate. A non-contact bearing generator characterized in that the generator is configured by supporting a plate independently of the case.