JPH106754A - Manufacture of viscous heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture inexpensively a viscous heater capable of responding to a request of various heating efficiencies successively. SOLUTION: As a first plate 2 being parted into both first and second heating chambers 7 and 8 in the axial direction, those of plural types, whose each inner diameter of a center hole 2a where a driving shaft 12 is mainly inserted through and externals are equal in substance, are provided for usage. Next, at least one piece of the first plate 2 obtained is selected, constituting a housing together with the rest housing body. In addition, both first and second rotors 13 and 14 of the driving shaft 12 rotating in these heating chambers 7 and 8 after making torque transmittable to this shaft 12 are adopted. Then, a viscous heater is assembled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manufacturing method for manufacturing a viscous heater for generating heat by shearing a viscous fluid and exchanging heat with a circulating fluid circulating in a radiating chamber to use as a heating heat source.

[0002]

2. Description of the Related Art Hitherto, Japanese Utility Model Laid-Open No. 4-11716 discloses a viscous heater as an auxiliary heating heat source used in a vehicle heating device. In this viscous heater,
A housing is composed of a plurality of plates that insert the drive shaft through the center hole and divide the heat generating chamber into a plurality of pieces in the axial direction, and the remaining housing body forms a housing. In this housing, a water jacket is formed around each heat generating chamber. ing. A plurality of rotors rotatable in each heating chamber are fixed to a drive shaft rotatably supported on the housing via a bearing device, and a gap between a wall surface of each heating chamber and an outer surface of each rotor is fixed. Is interposed with a viscous fluid. In the water jacket, circulating water is taken in from an inlet port and circulated from an outlet port to be sent to an external heating circuit.

In this viscous heater incorporated in a vehicle heating system, when a drive shaft is driven by an engine or the like, each rotor rotates in each heating chamber, and viscous fluid is applied to the wall surface of each heating chamber and each rotor. Heat is generated by shearing in the gap with the outer surface of the. This heat is exchanged with the circulating water in the water jacket, and the heated circulating water is supplied to the heating of the vehicle in the heating circuit.

[0004]

However, there are various demands for heating a vehicle depending on the area where the vehicle is used, such as when high efficiency is desired or when relatively low efficiency is sufficient. On the other hand, if the techniques described in the above-mentioned publications are successively answered to various demands, all the plates have the same shape with a central hole having the same inner diameter, and all the rotors have the same outer diameter and thickness. Therefore, it is necessary to cope with this by making the number of plates, heating chambers and rotors different, and in this case, the outer shape differs for each model, and it is difficult to adopt parts common to a plurality of models. As a result, the production cost will rise.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and has as its object to provide a low-cost viscous heater capable of sequentially responding to various demands for heating efficiency.

[0006]

[Means for Solving the Problems]

(1) A method of manufacturing a viscous heater according to claim 1, wherein a housing in which a heat generating chamber and a heat radiating chamber for circulating a circulating fluid adjacent to the heat generating chamber are formed, and the housing is rotatable via a bearing device. And a rotor rotatably provided in the heating chamber by the drive shaft. The rotor is interposed in a gap between a wall surface of the heating chamber and an outer surface of the rotor, and generates heat by rotation of the rotor. The manufacturing method of a viscous heater having a viscous fluid to be performed, wherein the heat generating chamber is divided into a plurality of pieces in the axial direction, and a plurality of types of plates having different inner diameters of center holes mainly through which the drive shafts are inserted and substantially equal outer shapes are provided. A first step of preparing the housing, the at least one plate obtained in the first step is selected to form the housing together with the remaining housing body, and each of the housings is fitted to the drive shaft so as to transmit torque. Employ coaxial plurality of the rotor which rotates in the heating chamber and having a, a second step of assembling the viscous heater.

According to the first aspect of the present invention, in the first step, as a plate for dividing the heat generating chamber into a plurality of pieces in the axial direction, a plurality of center holes through which the drive shafts are mainly inserted are different from each other and have substantially the same outer shape. Prepare seeds. Then
In a second step, at least one plate obtained in the first step is selected in order to sequentially respond to various demands for heating efficiency. Here, a plate with a small inner diameter of the center hole is
Since the area facing the radial direction in the heating chamber is large, a large amount of heat can be generated in the radial direction under the same torque. Further, a plate having a large inner diameter of the center hole has a small area facing the radial direction in the heat generating chamber, so that it can exert a small heat value in the radial direction under the same torque. Then, the housing is constituted by the selected plate together with the remaining housing body. In addition, a plurality of coaxial rotors that are fitted to the drive shaft so as to transmit torque and rotate in each heat generating chamber are employed. Thereafter, the viscous heater is assembled.

Since the viscous heater thus obtained has substantially the same outer shape of the plate, it is possible to meet various demands for heating efficiency while maintaining the same outer shape for each model. For this reason, parts common to a plurality of models can be easily adopted, and the manufacturing cost can be reduced. (2) The method for manufacturing a viscous heater according to claim 2 is the method for manufacturing a viscous heater according to claim 1, wherein a plurality of types of rotors having different outer diameters are prepared before the second step.
In the process, at least two rotors having different outer diameters are selected.

In the manufacturing method according to the second aspect, a plurality of types of rotors having different outer diameters are prepared before the second step. Then
In order to sequentially respond to various requests for heating efficiency, at least two rotors having different outer diameters are selected in the second step. Here, since the rotor having a large outer diameter has a large area facing the radial direction in the heat generating chamber, it can exert a large amount of heat generated in the radial direction under the same torque. Further, since the rotor having a small outer diameter has a small area facing the radial direction in the heat generating chamber, the rotor can exhibit a small amount of heat generated in the radial direction under the same torque. Further, the housing is constituted by at least one plate and the remaining housing body. Thereafter, the viscous heater is assembled.

In this way, if the rotors having different outer diameters are combined, the amount of generated heat can be made different, so that it is possible to meet various demands for heating efficiency while maintaining the same outer shape for each model. For this reason, parts common to a plurality of models can be easily adopted, and the manufacturing cost can be reduced. (3) The method for manufacturing a viscous heater according to claim 3 is the method for manufacturing a viscous heater according to claim 1 or 2, wherein a plurality of types of rotors having different thicknesses are prepared before the second step, and the thicknesses are respectively set in the second step. Are selected at least two rotors different from each other.

In the manufacturing method according to the third aspect, a plurality of types of rotors having different thicknesses are prepared before the second step. Then
In order to sequentially respond to various demands for heating efficiency, at least two rotors having different thicknesses are selected in the second step. Here, the rotor having a large thickness has a large area facing the axial direction in the heat generating chamber, and therefore can generate a large amount of heat generated in the axial direction under the same torque. Further, since the rotor having a small thickness has a small area facing the axial direction in the heat generating chamber, a small amount of heat can be exerted in the axial direction under the same torque. Further, the housing is constituted by at least one plate and the remaining housing body. Thereafter, the viscous heater is assembled.

As described above, when the rotors having different thicknesses are combined, the amount of generated heat can be made different, so that it is possible to meet various demands for heating efficiency while maintaining the same outer shape for each model. For this reason, parts common to a plurality of models can be easily adopted, and the manufacturing cost can be reduced. (4) In the method for manufacturing a viscous heater according to claim 4, in the method for manufacturing a viscous heater according to claim 1, 2, or 3, the plate is provided with a communication hole communicating with each heating chamber in the first step. It is characterized by.

In the viscous heater obtained by the manufacturing method according to any one of the first to third aspects, when a plate having a center hole with a small inner diameter is selected so that a large amount of heat is generated in the radial direction under the same torque, each of the heat generating chambers may be used. Are less likely to move relative to each other around the drive shaft. For this reason,
The viscous fluid may be degraded. In this regard, in the viscous heater obtained by the manufacturing method of claim 4, since the viscous fluid in each of the heat generating chambers moves through the communication hole, the life of the viscous fluid is extended.

In this viscous heater, the viscous fluid in each heating chamber is also sheared by the opening of the communication hole,
It becomes easier to generate heat.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments 1 to 4 embodying the invention described in each claim will be described below with reference to the drawings. (Embodiment 1) According to the manufacturing method of Embodiment 1,
2 and 4 are embodied.

[First Step] First, as shown in FIG. 1, a plurality of types of first plates 2 having different inner diameters of the center holes 2a and substantially the same outer shape are prepared. At this time, a plurality of communication holes 2b are also provided through the outer peripheral area of the first plate 2. Also,
Before the second step, a plurality of types of first and second rotors 13 and 14 having different outer diameters are prepared.

[Second Step] Next, one first plate 2 obtained in the first step is selected in order to sequentially respond to a request for a certain heating efficiency. Here, the first plate 2 having a small inner diameter of the center hole 2a can exert a large amount of heat generation in the radial direction under the same torque. The first plate 2 having a large inner diameter of the center hole 2a can exert a small heat value in the radial direction under the same torque. Then, the front housing body 1 and the second
The housing is constituted together with the remaining housing body composed of the plate 3 and the rear housing body 4.

Further, two first and second rotors 13 and 14 having different outer diameters obtained in the first step are selected. Here, the first rotor 13 having a large outer diameter can generate a large amount of heat in the radial direction under the same torque.
Further, the second rotor 14 having a small outer diameter can exert a small amount of heat in the radial direction under the same torque.

Thereafter, the viscous heater is assembled. In the viscous heater thus obtained, the front housing main body 1, the first plate 2, the second plate 3, and the rear housing main body 4 constituting the housing are arranged with the gasket 5 interposed between the second plate 3 and the rear housing main body 4. , And are fastened by a plurality of through bolts 6 in a stacked state. The recess 1 a formed in the rear end face of the front housing body 1 forms a first heat generating chamber 7 together with the flat front end face of the first plate 2, and is formed in the front end face of the second plate 3. The formed concave portion 3a forms a second heat generating chamber 8 coaxial with the first heat generating chamber 7 together with the flat rear end surface of the first plate 2.
In this manner, the first heat generating chamber 7 and the second heat generating chamber 8 are separated by the first plate 2 in the housing, and the first heat generating chamber 7 and the second heat generating chamber 8 are respectively separated by the center hole 2a and the communication hole 2b of the first plate 2.
The heat generating chambers 7 and 8 can communicate with each other.

The rear end face of the second plate 3 and the inner face of the rear housing body 4 form a water jacket WJ as a heat radiating chamber adjacent to the rear of the first and second heat generating chambers 7 and 8. A water inlet port 9 and a water outlet port (not shown) are formed adjacent to an outer region of the rear surface of the rear housing body 4, and the water inlet port 9 and the water outlet port communicate with the water jacket WJ.

The front housing body 1 has a first
2. A shaft sealing device 10 is provided adjacent to the heat generating chambers 7 and 8, and a bearing device 11 is provided in the boss. A drive shaft 12 is rotatably supported via the shaft sealing device 10 and the bearing device 11, and a flat disk-shaped first rotor rotatable in the first heat generating chamber 7 is provided behind the drive shaft 12. 13 and a second rotor 14 which is rotatable in the second heat generating chamber 8 and has a smaller diameter than the first rotor 13 are press-fitted so as to be able to transmit torque. And the first and second heat generating chambers 7 and 8
Silicon oil as a viscous fluid is interposed in the gap between the wall surfaces of the first and second rotors 13 and 14. A pulley 16 is provided at the end of the drive shaft 12 by a bolt 15, and is rotated by a belt by an engine of the vehicle.

In this viscous heater incorporated in the heating device of the vehicle, when the drive shaft 12 is driven by the engine via the pulley 16, the first rotor 1
3 rotates and the second rotor 14 rotates in the second heat generating chamber 8, so that the silicon oil flows between the wall surfaces of the first and second heat generating chambers 7 and 8 and the outer surfaces of the first and second rotors 13 and 14. Heat is generated by shearing in the gap.

At this time, the viscosity coefficient is μ, the radii of the first and second rotors 13 and 14 are R, the axial length of the first and second rotors 13 and 14 is l, and the wall surfaces of the first and second heat generating chambers 7 and 8 are If the gap between the first and second rotors 13 and 14 is δ and the angular velocity is ω,
The heat value L ₁ in the radial direction on the front and rear surfaces is L ₁ = πμω ² R ⁴ / δ.

Similarly, the heat value L ₂ in the axial direction on the outer peripheral surface is L ₂ = 2πμω ² R ³ 1 / δ. This heat is exchanged with the circulating water as the circulating fluid in the water jacket WJ, and the heated circulating water is used for heating the vehicle in the heating circuit. In order to sequentially respond to other demands for heating efficiency with this viscous heater, a first plate having a different inner diameter of the center hole 2a and having substantially the same outer shape can be used, and can be accommodated in the first and second heat generating chambers 7, 8. By combining rotors having different thicknesses and equal outer diameters, the heat values L ₁ and L ₂ can be made different.
This can be dealt with while the outer shape remains the same for each model. For this reason, in the first embodiment, all parts other than the first plate 2 and the first and second rotors 13 and 14 can be shared by a plurality of models, so that manufacturing costs can be reduced.

In the viscous heater obtained by this manufacturing method, the silicon oil in the first and second heat generating chambers 7 and 8 is reduced by the Weissenberg effect to the center hole 2a and the communication hole 2.
Since they move relative to each other via b (ie, they can be circulated), the life of the silicone oil is extended. Further, in this viscous heater, the silicon oil in the first and second heat generating chambers 7 and 8 is also sheared by the opening of the communication hole 2b, so that heat is more easily generated.

It should be noted that the pulley 16 in this embodiment can be replaced with an electromagnetic clutch or the like. (Embodiment 2) According to the manufacturing method of Embodiment 2,
2 and 4 are embodied. "First Step" First, as shown in FIG. 2, a plurality of types of second plates 23 having different inner diameters of the center holes 23a and substantially the same outer shape are prepared. At this time, a plurality of communication holes 23b are also provided in the outer peripheral area of the second plate 23. Also, the second
A plurality of first and second rotors 4 having different outer diameters before the process.
1 and 42 are prepared.

[Second Step] Next, as in the first embodiment, one second plate 23 obtained in the first step is selected in order to sequentially respond to a request for a certain heating efficiency. Then, the second plate 23 constitutes a housing together with the remaining housing body consisting of the front housing body 21, the first plate 22, the third plate 24, and the rear housing body 25.

As in the first embodiment, the two first and second rotors 4 obtained in the first step and having different outer diameters are used.
1, 42 are selected. Thereafter, the viscous heater is assembled. In the viscous heater thus obtained, the front housing main body 21 and the first plate 2
2, the second plate 23, the third plate 24 and the rear housing body 25 are provided with O-rings 2 on both sides of the second plate 24.
6a, 26b, and between the front housing body 21 and the first plate 22 and between the third plate 24 and the rear housing body 25 via gaskets 27, 28,
Each of them is fastened by a plurality of through bolts 29 in a stacked state.

The recess 22a formed on the rear end face of the first plate 22 forms a heat generating chamber 30 together with the flat front end face of the second plate 23. The recess 24a formed on the front end face of the third plate 24 A variable heating chamber 31 coaxial with the heating chamber 30 is formed together with the flat rear end surface of the second plate 23. A collecting recess 24b facing the central area of the variable heat generating chamber 31 is formed in the front end surface of the third plate 24, and a first collecting hole 24c is formed at a position outside the collecting recess 24b to extend to the rear end surface. I have. Further, in the third plate 24, a supply groove 24 d extends from the lower outer side of the collecting recess 24 b to the lower outer area of the variable heat generating chamber 31.
The first supply hole 24e also extends through the rear end face at a position from inside d. Thus, the heating chamber 30
And the variable heating chamber 31 are connected to the second plate 23 in the housing.
The heat generating chambers 30 and 31 can communicate with each other through the center hole 23a and the communication hole 23b of the second plate 23.

The inner surface of the front housing body 21 and the front end surface of the first plate 22 form a front water jacket FW as a heat radiating chamber adjacent to the front of the heat generating chamber 30. On the other hand, a first rib 25a that comes into contact with the gasket 28 is provided in the rear housing main body 25 in a ring shape, and a rear end surface of the third plate 24 and an inner surface of the rear housing main body 25 outside the first rib 25a are formed. Variable heating room 3
A rear water jacket RW is formed as a heat radiating chamber adjacent to the rear of the rear plate 1 and the rear end face of the third plate 24 and the inner surface of the rear housing body 25 inside the first rib 25a are formed with the collecting recess 24b and the first A control room CR communicating with the supply hole 24e is formed.

A water inlet port 32 and a water outlet port (not shown) are formed adjacent to the rear surface of the rear housing body 25, and the water inlet port 32 and the water outlet port communicate with the rear water jacket RW. First to third plates 22 to
A plurality of water passages 33 as circulating fluid passages are provided at equal intervals between the respective through bolts 29, and the front water jacket FW and the rear water jacket RW are connected to each other by the water passage 33.

A second rib 25b is provided in the control room CR of the rear housing main body 25 in a ring shape, and a valve shaft 34 is rotatably held at the center of the second rib 25b. An outer end of a bimetallic spiral spring 35 as a temperature-sensitive actuator is locked to the second rib 25b, and an inner end of the bimetallic spiral spring 35 is locked to a valve shaft 34. The bimetal spiral spring 35 is set at a predetermined temperature for displacement based on the set heating temperature. A disc-shaped rotary valve 36 is fixed to the front end of the valve shaft 34. The rotary valve 36 is provided with a first recovery hole 24c and a second recovery hole 24 by a disc spring 37 having a front end surface of the second rib 25b as a seating surface. The first supply hole 24e is pressed in a direction to close the opening on the control room CR side. The rotary valve 36 has an arc-shaped second recovery hole (not shown) and a second supply hole 36a which can communicate with the first recovery hole 24c or the first supply hole 24e depending on the rotation angle of the rotary valve 36. ing.

Further, a shaft sealing device 38 is provided in the boss of the first plate 22 adjacent to the heat generating chamber 30, and a bearing device 39 is provided in the boss of the front housing body 21. A drive shaft 40 is rotatably supported via the shaft sealing device 38 and the bearing device 39. Behind the drive shaft 40, a flat plate-shaped first rotor 4 rotatable in the heat generating chamber 30 is provided.
1 is press-fitted so as to be fitted with a second rotor 42 which is rotatable in the variable heat generating chamber 31 and has a smaller diameter than the first rotor 41 so as to be able to transmit torque. In the center area of the second rotor 42, a plurality of communication holes 42 penetrating back and forth
a is penetrated. And the wall surface of the heating chamber 30 and the first
The gap between the outer surface of the rotor 41, the gap between the wall surface of the variable heat generating chamber 31 and the outer surface of the second rotor 42, and the bimetal spiral spring 3
Silicon oil is interposed in the control room CR in a degree that almost all of 5 is immersed. A not-shown pulley or an electromagnetic clutch is provided at the tip of the drive shaft 40, and is rotated by a belt by an engine of the vehicle.

In the variable capacity viscous heater incorporated in the heating device of the vehicle, if the drive shaft 40 is driven by the engine, the first rotor 41 rotates in the heating chamber 30 and the variable heating chamber 31 rotates. As a result, the second rotor 42 rotates, so that the silicon oil generates heat by shearing in the gap between the wall surface of the heating chamber 30 and the outer surface of the first rotor 41 and the gap between the wall surface of the variable heating chamber 31 and the outer surface of the second rotor 42. I do. This heat is exchanged with the circulating water as the circulating fluid in the front and rear water jackets FW and RW, and the heated circulating water is supplied to the heating of the vehicle by the heating circuit.

During this time, if the second rotor 42 is kept rotating, the silicon oil in the variable heat generating chamber 31 tends to collect in the central region by at least the Weissenberg effect. Here, if the temperature of the silicon oil in the control room CR is low, the heating is too weak, and the bimetallic spiral spring 35 does not connect the second recovery hole to the first recovery hole 24c, but the second supply hole 36a. To the first supply hole 24e. For this reason, the silicon oil in the variable heat generating chamber 31 is not recovered into the control chamber CR through the recovery recess 24b, the first recovery hole 24c, and the second recovery hole. The silicone oil collected in the control chamber CR passes through the second supply hole 36a, the first supply hole 24e, and the supply groove 24d, and is supplied to the variable heat generating chamber 31.
Supplied within. At this time, the silicone oil in the control chamber CR is easily sent out through the communication hole 42a between the front wall surface of the variable heat generation chamber 31 and the front side surface of the second rotor 42. When silicon oil is supplied to the gap between the wall surface of the variable heat generation chamber 31 and the outer surface of the second rotor 42, the variable heat generation chamber 31
The amount of heat generated in the gap between the wall surface of the second rotor 42 and the outer surface of the second rotor 42 is increased (capacity expansion), and heating is enhanced.

On the other hand, if the temperature of the silicon oil in the control room CR rises, the heating is becoming intense. Therefore, the bimetallic spiral spring 35 connects the second recovery hole to the first recovery hole 24c.
And the second supply hole 36a is not communicated with the first supply hole 24e. For this reason, the silicon oil in the variable heat generating chamber 31 is recovered into the control chamber CR via the recovery recess 24b, the first recovery hole 24c, and the second recovery hole. At this time, the silicon oil between the front wall surface of the variable heat generating chamber 31 and the front side surface of the second rotor 42 is easily collected in the control room CR via the communication hole 42a. The silicon oil collected in the control chamber CR is supplied to the second supply hole 36a, the first supply hole 24e, and the supply groove 2a.
After passing through 4d, it is not supplied into the variable heating chamber 31. When the silicon oil is collected in the control room CR, the amount of heat generated in the gap between the wall surface of the variable heat generation chamber 31 and the outer surface of the second rotor 42 is reduced (capacity is reduced), and the heating is weakened.

When the capacity is reduced from the capacity reduced state to the capacity expanded state, or when the capacity is reduced to the capacity reduced state, supply and recovery of the silicon oil to and from the variable heat generating chamber 31 provided with the small-diameter second rotor 42 are performed. It is performed quickly, and the responsiveness of the heating capacity is improved. Further, by employing the variable heat generating chamber 31, it is possible to reduce a drive shock caused by an engine or the like.

When the viscous heater sequentially responds to other demands for heating efficiency, a second plate having a different inner diameter of the center hole 23a and having substantially the same outer shape is employed. The thickness that can be stored in is equal,
When the first and second rotors having different outer diameters are combined, the heat generation amounts L ₁ and L ₂ can be made different, so that this can be dealt with while the outer shape remains the same for each model.

Further, by selecting the second rotor provided in the variable heat generating chamber 31 by its outer diameter, the degree of capacity control can be varied. Therefore, also in the second embodiment, the second plate 23 and the first and second rotors 41 and 42 are used.
Since all the other parts can be shared by a plurality of models, the manufacturing cost can be reduced.

In the viscous heater obtained by this manufacturing method, the silicon oil in the heat generating chamber 30 and the variable heat generating chamber 31 move mutually through the center hole 23a and the communication hole 23b due to the Weissenberg effect. Life extension is realized. However, the size of the center hole 23a is formed so that the amount of silicon oil in the gap between the wall surface of the heat generating chamber 30 and the outer surface of the first rotor 41 hardly changes.

Further, in this viscous heater, the silicone oil in the heat generating chamber 30 and the variable heat generating chamber 31 is supplied to the communication holes 2.
Shearing is also caused by the opening 3b, and heat is more easily generated. (Embodiment 3) According to the manufacturing method of Embodiment 3,
4 is embodied.

[First Step] First, as shown in FIG. 3, a second plate 23 according to the second embodiment is prepared. Before the second step, a plurality of first and second rotors 5 having different thicknesses are provided.
3, 54 are prepared. [Second Step] Next, as in the first embodiment, one second plate 23 obtained in the first step is selected in order to sequentially respond to a request for a certain heating efficiency. And the second plate 2
3 forms a housing together with the remaining housing main body including the front housing main body 21, a second plate 51 described later, a third plate 52 described later, and the rear housing main body 25.

Further, two first and second rotors 53 and 54 having different outer diameters obtained in the first step are selected. Here, the first and second rotors 53, which are both thicker than the first and second rotors 41, 42 (see FIG. 2) of the second embodiment,
Reference numeral 54 indicates a large amount of heat generated in the axial direction under the same torque. However, the second rotor 54 has the first
Since the outer diameter is smaller than that of the rotor 53, only a small amount of heat can be exerted in the radial direction.

Thereafter, the viscous heater is assembled. The viscous heater thus obtained has a longer axial length and a deeper recess 51a than that of the second embodiment (see FIG. 2).
The first plate 51 which is recessed to form the heat generating chamber 55
And a third plate 52 having a longer axial length and a deeper recess 52a to form a variable heat generating chamber 56, and a first rotor 53 and a second rotor 54 both having a large thickness. Further, a through bolt 57 and a drive shaft 58 having a longer shaft length than those of the second embodiment are employed. Other components are the same as those of the second embodiment.

In this viscous heater, the first and second rotors 53 and 54 having a greater thickness than that of the second embodiment are combined to meet various demands for the heating efficiency and the degree of capacity control. In this case, since the components other than those described above are shared, the manufacturing cost can be reduced. Other functions and effects are the same as those of the second embodiment. (Embodiment 4) The manufacturing method according to Embodiment 4 also provides
4 is embodied.

[First Step] First, as shown in FIG. 4, a second plate 23 according to the second and third embodiments is prepared. Before the second step, a plurality of types of first and second rotors 63 and 64 having different thicknesses are prepared. [Second Step] Next, as in the first embodiment, one second plate 23 obtained in the first step is selected in order to sequentially respond to a request for a certain heating efficiency. And the second plate 2
3, the housing is formed together with the remaining housing main body including the front housing main body 21, a second plate 61 described later, a third plate 62 described later, and the rear housing main body 25.

Further, two first and second rotors 63 and 64 having different outer diameters obtained in the first step are selected. Here, the second rotor 64 is capable of exhibiting a large amount of heat generation in the radial direction by being thicker than the first rotor 63. Thereafter, the viscous heater is assembled. The viscous heater thus obtained has a shorter axial length and a shallower recess 61 than that of the third embodiment (see FIG. 3).
The first plate 61 in which a is formed to form the heat generating chamber 65
And a third plate 62 having a longer axial length and a deeper recess 62a to form a variable heat generating chamber 66, and first and second rotors 63 and 64 having opposite thicknesses in front and rear. ing. Other components are the same as those of the second and third embodiments.

In the viscous heater, the first rotor 63 and the second
Although the rotor 64 is employed, the outer shape is exactly the same as the viscous heater of the third embodiment. Other functions and effects are the same as those of the second and third embodiments. In the above embodiments,
Although the cooling water as the circulating water is employed as the circulating fluid, the invention is not limited to this, and other fluids such as oil may be employed.

Although the embodiments of the present invention have been described above, the embodiments of the present invention include the following various technical items in addition to the technical items described in the claims. (A) That is, in the viscous heater according to claim 1, at least one of the divided heat generating chambers constitutes a variable heat generating chamber having a variable capacity mechanism, and the variable heat generating chamber has a central area. A viscous heater, which is communicated with a control chamber, wherein the recovery of the viscous fluid from the variable heating chamber to the control chamber when the capacity is reduced is performed at least by the Weissenberg effect of the viscous fluid.

In such a viscous heater, the degree of capability control can be varied by selecting the rotor provided in the variable heating chamber by its outer diameter or thickness. Also,
It is possible to reduce the drive shock caused by the engine or the like. (B) The viscous heater according to (A), wherein a rotor having a smaller diameter is provided in the variable heating chamber as compared with the rotors in the other heating chambers.

In such a viscous heater, the supply and recovery of the viscous fluid to and from the variable heat generating chamber provided with a small-diameter rotor is performed when the capacity is reduced from the capacity reduced state and when the capacity is reduced from the capacity expanded state. It is performed quickly, and the responsiveness of the heating capacity is improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a viscous heater according to a first embodiment.

FIG. 2 is a longitudinal sectional view of a viscous heater according to a second embodiment.

FIG. 3 is a longitudinal sectional view of a viscous heater according to a third embodiment.

FIG. 4 is a longitudinal sectional view of a viscous heater according to a fourth embodiment.

[Explanation of symbols]

7, 8, 30, 31, 55, 56, 65, 66 ... heat generating chamber (7 ... first heat generating chamber, 8 ... second heat generating chamber, 31, 56, 66)
... Variable heat generation chamber WJ, FW, RW ... Heat radiation chamber (Water jacket (FW)
... front water jacket, RW ... rear water jacket)) 1, 2, 3, 4, 21, 22, 23, 24, 25, 5
1, 52, 61, 62 ... housing (1, 21 ... front housing body, 2, 22, 51, 61 ... first plate,
3, 23 ... second plate, 24, 52, 62 ... third plate, 4, 25 ... rear housing body) 2a, 23a ... center hole 2b, 23b ... communication hole 11, 39 ... bearing device 12, 40, 58 ... Drive shafts 13, 41, 53, 63: first rotor 14, 42, 54, 64: second rotor CR: control room

Claims (4)

[Claims] A housing for forming a heat-generating chamber and a heat-radiating chamber adjacent to the heat-generating chamber for circulating a circulating fluid; a drive shaft rotatably supported by the housing via a bearing device; A viscous heater having a rotor rotatably provided by the drive shaft in the heat generating chamber, and a viscous fluid interposed in a gap between a wall surface of the heat generating chamber and an outer surface of the rotor and heated by the rotation of the rotor; A first step of dividing the heat generating chamber into a plurality of pieces in the axial direction and preparing a plurality of types of plates having different inner diameters of center holes mainly through which the drive shafts are inserted, and having substantially the same outer shape; The at least one plate obtained in the first step is selected to constitute the housing together with the remaining housing body, and the housing is fitted to the drive shaft so as to transmit torque, and is coaxially rotated in each of the heat generating chambers. Multiple Manufacturing method of the viscous heater characterized by having a second step of assembling the viscous heater by employing the rotor. 2. The method according to claim 1, wherein a plurality of types of rotors having different outer diameters are prepared before the second step, and at least two rotors having different outer diameters are selected in the second step. Manufacturing method of viscous heater. 3. The method according to claim 1, wherein a plurality of types of rotors having different thicknesses are prepared before the second step, and at least two rotors having different thicknesses are selected in the second step. Manufacturing method of viscous heater. 4. The plate according to claim 1, wherein the plate is provided with a communication hole communicating with each heating chamber in the plate.
4. The method for manufacturing a viscous heater according to 2 or 3.