JP2000211344A - Heat generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve ability to mount a heat generator to a vehicle or the like while avoiding an increase in size in the axial direction. SOLUTION: This heat generator includes an inner fixed member 4 having a heat- radiating chamber (water jacket WJ) for circulating a recirculating fluid formed therein, and an outer driving member 12. The outer driving member 12 is disposed radially outside the inner fixed member 4 so as to form a heat-generating chamber 15 between the outer driving member 12 and the outer surface of the inner fixed member 4 such that the heat-generating chamber 15 is located adjacent to the heat-radiating chamber. The outer driving member 12 is rotatably supported by the inner fixed member 4, and rotary driving force is transmitted to the outer driving member 12. The heat- generating chamber 15 is formed radially inside the outer driving member 12 that rotates in response to direct transmission of the rotary driving force. By rotation of the outer driving member 12, a viscous fluid is subjected to shearing in a fluid-tight clearance of the heat-generating chamber 15. The outer driving member 12 serves both as a member for transmitting the rotary driving force and a member for providing shearing to the viscous fluid by the rotation. Moreover, the heat-generating chamber 15 is formed radially inside the outer driving member 12. As a result, reduction in size in the axial direction can be achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat generator that generates heat by shearing a viscous fluid, exchanges heat with a circulating fluid circulating in a radiating chamber, and uses the heat as a heating heat source.

[0002]

2. Description of the Related Art Conventionally, Japanese Patent Application Laid-Open No. 10-35259 discloses a heat generator used for a vehicle heating device. In this heat generator, a cylindrical heat generating chamber is formed in a housing, and a water jacket as a heat radiating chamber for circulating a circulating fluid is formed adjacent to the heat generating chamber radially outward. A drive shaft is rotatably supported on the housing via a bearing device and a shaft seal device. A pulley driven by an engine is fixed to a front end of the drive shaft, and heat is generated behind the drive shaft. A columnar rotor is rotatably fixed in a room. Here, the inner peripheral surface of the heat generating chamber is opposed to the outer peripheral surface of the rotor to form a cylindrical liquid-tight gap, and a viscous fluid such as silicone oil is interposed in the liquid-tight gap. Due to the interval between the liquid-tight gaps, heat that can be used effectively by the rotation of the rotor can be secured.

In this heat generator incorporated in a vehicle heating system, when a drive shaft is driven by an engine via a belt wrapped around a pulley, a rotor rotates in a heat generating chamber, so that viscous fluid is liquid-tight. Heat is generated by shearing in the target gap. This heat is exchanged with cooling water as a circulating fluid in the water jacket, and the heated cooling water is supplied to the heating of a vehicle compartment or the like in a heating circuit.

[0004]

However, in the above-described conventional heat generator, a pulley is provided at the front end of the drive shaft, and a columnar rotor is provided at the rear end of the drive shaft. Since the pulley for transmitting force and the cylindrical rotor that applies shear to the viscous fluid by rotation are arranged in series in the axial direction, it becomes larger in the axial direction and can be mounted easily in the engine room of the vehicle. Was low.

The present invention has been made in view of the above circumstances, and a member for transmitting a rotational driving force and a member for applying a shear to a viscous fluid by rotation are serially arranged in the axial direction, that is, in the axial direction. It is an object of the present invention to provide a heat generator having an improved mountability on a vehicle or the like while avoiding an increase in the size.

[0006]

According to a first aspect of the present invention, there is provided a heat generator, wherein a heat radiating chamber for circulating a circulating fluid is provided between an inner fixing member and an outer surface of the inner fixing member. An outer driving member disposed radially outward of the inner fixing member so as to form a heating chamber adjacent to the heat radiating chamber, and rotatably supported by the inner fixing member, to which a rotational driving force is transmitted; A viscous fluid housed in the heating chamber, interposed in a liquid-tight gap between the outer surface of the inner fixing member and the inner surface of the outer driving member, and heated by the rotation of the outer driving member. It is characterized by having.

In this heat generator, when a rotational driving force is transmitted from a vehicle engine or the like via a pulley or the like to the outer driving member and the outer driving member rotates, the inner surface of the outer driving member and the diameter of the outer driving member are changed. Liquid-tight gap in the heating chamber formed between the outer surface of the inner fixing member disposed on the inner side in the direction,
The viscous fluid generates heat by shearing. This heat is exchanged with the circulating fluid in the heat radiating chamber formed inside the inner fixed member, and the heated circulating fluid is supplied to the heating circuit to heat the passenger compartment and the like.

As described above, in this heat generator, the heat generating chamber is formed radially inward of the outer driving member which is rotated by directly transmitting the rotational driving force, and the liquid crystal of the heat generating chamber is formed by the rotation of the outer driving member. The viscous fluid undergoes shear in the gap. That is, the outer driving member serves both as a member for transmitting the rotational driving force and a member for applying shear to the viscous fluid by rotation, and furthermore, a heat generating chamber is formed radially inside the outer driving member. For this reason, in this heat generator, a member for transmitting rotational driving force and a member for applying shear by rotation are not arranged in series in the axial direction as in a conventional heat generator, Shortening can be achieved. Therefore, it is possible to improve the mountability on a vehicle or the like.

In this heat generator, the radiating chamber is located radially inward, and the heat generating chamber is located radially outward of the radiating chamber. Here, since the viscous fluid receives heat by rotation and generates heat, it is advantageous to position the heat generation chamber further outside in the radial direction to increase the heat generation amount. For this reason, the positional relationship between the heat radiating chamber and the heat generating chamber in this heat generator increases the calorific value while suppressing the increase in the diameter of the heat generator as compared with the case where the two chambers are in the opposite positional relationship. The above is advantageous. Furthermore, since the amount of heat generation can be increased by positioning the heating chamber radially outward, the viscosity of the viscous fluid can be reduced, so that the durability of the viscous fluid is improved by improving the circulation of the viscous fluid. It can be improved.

(2) The heat generator according to the second aspect is the heat generator according to the first aspect, wherein the viscous chamber is communicated with the heat-generating chamber by a recovery passage and a supply passage, and exceeds the volume of the liquid-tight gap. A storage chamber capable of storing a fluid is provided. In this heat generator, the viscous fluid circulates between the heat generation chamber and the storage chamber via the recovery passage and the supply passage. In addition, since a viscous fluid exceeding the volume of the liquid-tight gap can be stored in the storage chamber, there is a margin in the amount of viscous fluid to be sheared, and it is not necessary to always shear only a specific viscous fluid. It is possible to delay the deterioration of the fluid.

(3) In the heat generator according to the third aspect, in the heat generator according to the second aspect, the storage chamber is provided in the outer driving member, and the supply passage is provided in an outer peripheral area of the storage chamber. It is characterized by being open. In this heat generator, the storage chamber is simultaneously rotated by the rotation of the outer driving member, and a centrifugal force acts on the viscous fluid in the storage chamber. Then, the viscous fluid that has moved to the outer peripheral side due to the centrifugal force in the storage chamber is supplied to the heat generation chamber from a supply passage that opens to the outer peripheral area of the storage chamber. Therefore, the viscous fluid can be promptly supplied from the storage chamber to the heat generating chamber by the rotation of the outer driving member, and it is possible to achieve quick heat generation.

(4) The heat generator according to a fourth aspect of the present invention is the heat generator according to the second or third aspect, wherein at least one of the recovery passage and the supply passage is openable and closable. Things. In this heat generator, the recovery of the viscous fluid from the heating chamber to the storage chamber is started or stopped by opening and closing the recovery passage, and the supply of the viscous fluid from the storage chamber to the heating chamber is started or stopped by opening and closing the supply passage. Therefore, the storage capacity of the storage room is a control room. Then, if the capacity is reduced, even if the outer driving member maintains the high-speed rotation, the temperature of the viscous fluid in the heat generating chamber is suppressed from increasing, and deterioration is prevented.

(5) In the heat generator according to the fifth aspect, in the heat generator according to the first, second, third or fourth aspect, the circulating fluid is guided to the outer peripheral area of the radiating chamber in the radiating chamber. Further, a guide passage which circulates along the inner surface of the inner fixing member is provided. In this heat generator, since the circulating fluid is guided by the guide passage to the outer peripheral area of the heat radiating chamber and flows along the inner surface of the inner fixing member, the viscosity of the heat generating chamber provided on the outer surface side of the inner fixing member is increased. The heat exchange rate between the fluid and the circulating fluid can be improved.

(6) The heat generator according to claim 6, wherein the outer driving member is a cylinder having an inner surface defining the heat generating chamber. And a pulley portion disposed on the cylindrical portion. In this heat generator, by applying a belt connected to an engine or the like of a vehicle to a pulley portion of an outer driving member, rotational driving force is transmitted from the engine or the like of the vehicle to the pulley portion via the belt, and together with the pulley portion, The cylindrical part rotates. This causes the viscous fluid to generate heat by shearing in the liquid-tight gap in the heating chamber formed between the inner surface of the cylindrical portion and the outer surface of the inner fixing member.

(7) In the heat generator according to claim 7, in the heat generator according to claim 6, the cylindrical portion and the pulley portion are connected by a connecting portion, and the pulley portion is centrifuged from the cylindrical portion. It is characterized by being arranged at a distance in the direction. In this heat generator, since the pulley portion is disposed at a distance in the centrifugal direction from the cylindrical portion defining the heat generating chamber, heat in the heat generating chamber is hardly transmitted to the pulley portion,
Thermal deterioration of the belt applied to the pulley can be suppressed.

Preferably, a through hole may be provided in the connecting portion, or the material of the outer driving member may be a material having low heat conductivity, for example, a resin. This makes it possible to more effectively suppress the thermal deterioration of the belt applied to the pulley portion. (8) The heat generator according to claim 8 is the heat generator according to claims 1, 2, 3,
8. The heat generator according to 4, 5, 6, or 7, wherein at least a part of the liquid-tight gap is formed in a cylindrical shape between an outer peripheral surface of the inner fixing member and an inner peripheral surface of the outer driving member. It is characterized by having.

In this heat generator, at least a part of the viscous fluid in the heat generating chamber is sheared by a cylindrical liquid-tight gap between the outer peripheral surface of the inner fixing member and the inner peripheral surface of the outer driving member. Fever. In the case where the viscous fluid is sheared and heated by the liquid-tight gap formed in the cylindrical shape in this way, the diameter of the heat generator can be increased by increasing the axial length of the cylindrical liquid-tight gap. And the amount of heat generated can be increased.

(9) The heat generator according to claim 9 is the heat generator according to claim 1, 2, 3, 4, 5, 6, 7 or 8, wherein at least a part of the liquid-tight gap is provided. A disk ring is formed between an outer end surface of the inner fixing member and an inner end surface of the outer driving member. In this heat generator, at least a part of the viscous fluid in the heat generating chamber is sheared by a liquid-tight gap formed in a disk ring shape between the outer end face of the inner fixed member and the inner end face of the outer drive member, and generates heat. I do. In the case where the viscous fluid is sheared and heat is generated in the liquid-tight gap formed in the disk ring shape as described above, the radial width of the liquid ring-shaped gap in the disk ring is increased to increase the axial direction of the heat generator. The calorific value can be increased while avoiding an increase in length.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments 1 to 4 embodying the present invention will be described below with reference to the drawings. (Embodiment 1) In a viscous heater as a heat generator according to Embodiment 1, as shown in FIG. 1, a rear end of a front stator 1 is closed by a rear stator 3 with a bolt (not shown) via a plate gasket 2, and 1 and the rear stator 3 constitute an inner fixing member 4.
The inner fixing member 4 is a front boss 4a of the front stator 1.
And a rear boss portion 4b of the rear stator 3, a front flange portion 4c of the front stator 1, a rear flange portion 4d of the rear stator 3, and a cylindrical portion 4e of the front stator 1. It is assembled to an engine block (not shown) via a mounting member 5 screwed via a seal washer 5a. The front boss 4a has a water inlet port 4f penetrating therethrough, and the rear boss 4b and the mounting member 5 have a water outlet port 4g penetrating therethrough.

A cylindrical internal space is formed in the inner fixing member 4, and a substantially cylindrical guide passage forming member 6 is accommodated in the internal space. This internal space constitutes a water jacket WJ as a heat radiating chamber. A spiral fin 6 a is projected from an outer peripheral side surface of the guide passage forming member 6, and forms a spiral passage 6 b with an inner peripheral side surface of the cylindrical portion 4 e of the inner fixing member 4. A front recess 6c communicating with the water inlet port 4f is formed in the front end surface of the guide passage forming member 6, and a rear recess 6d communicating with the water outlet port 4g is formed in the rear end surface of the guide passage forming member 6. The front and rear recesses 6c and 6d are provided with front and rear through holes 6e and 6d.
It communicates with the spiral passage 6b via f. The cooling water as the circulating fluid that has entered the water jacket WJ from the water inlet port 4f in this way passes through the front concave portion 6c, the front through hole 6e, the spiral passage 6b, the rear through hole 6f, and the rear concave portion 6d in this order from the outlet port 4g. It is being flooded. The front concave portion 6c, the front through hole 6e, the spiral passage 6b, the rear through hole 6f, and the rear concave portion 6d guide the cooling water to the outer peripheral area of the water jacket WJ and circulate along the inner surface of the inner fixing member 4. Construct a guide passage. The front and rear recesses 6
Each of c and 6d is formed in a circular cross section having an inner diameter larger (about 5 to 8 times) than the diameter of the water inlet port 4f and the water outlet port 4g.

On the other hand, the rear end of the front rotor 7 is closed by a ring thick plate-shaped rear rotor 9 by a bolt (not shown) via a plate gasket 8, and the rear end of the rear rotor 9 is connected by a bolt (not shown) via a plate gasket 10. Thus, the outer drive member 12 is constituted by the front rotor 7, the rear rotor 9 and the rear end plate 11. The front rotor 7 of the outer driving member 12 includes a front boss 12a and a front flange 12b.
, A cylindrical portion 12c, and a pulley portion 12d integrally projecting from the outer peripheral side surface of the cylindrical portion 12c. A belt connected to an engine of a vehicle (not shown) is applied to the pulley portion 12d, and thereby a rotational driving force from the engine is transmitted to the outer drive member 12 via the belt.

The outer driving member 12 is disposed radially outside the inner fixing member, and the front boss 12a and the rear rotor 9 are mounted on the front and rear bosses 4a and 4b of the inner fixing member 4 in a bearing device with a built-in shaft sealing device. It is rotatably supported via 13 and 14. A water jacket W is provided between the outer surface of the inner fixing member 4 and the inner surface of the outer driving member 12.
A heat generating chamber 15 adjacent to J is formed in a closed state. The heat generating chamber 15 is provided on the front flange 12 of the front rotor 7.
b, a front disk-shaped liquid-tight gap formed between the rear end face of the front stator 1 and the front end face of the front flange portion 4c, and the inner peripheral side face of the cylindrical portion 12c of the front rotor 7 and the front stator 1 And a rear disk formed between the front end surface of the rear rotor 9 and the rear end surface of the rear flange portion 4d of the rear stator 3. It has a ring-shaped liquid-tight gap. In addition, the liquid-tight gap is a gap that can apply a shearing force capable of securing sufficient heat generation by the rotation of the outer driving member 12 to the silicone oil described later.

The rear end face of the rear rotor 9 has a ring-shaped recess 9.
a is recessed, and the storage chamber S is sealed with the rear end plate 11.
R is formed. This storage room SR and the heat generation chamber 15
, A silicone oil as a viscous fluid is interposed with air. Here, in this viscous heater,
Since the storage chamber SR can store silicone oil exceeding the volume of the liquid-tight gap, strict management of the storage amount of silicone oil is not required. The storage room SR and the heating room 15
The collection passage 16 and the supply passage 17 communicate with each other.
The recovery passage 16 is formed by connecting a pipe to a through hole formed through the cylindrical portion 12 c of the front rotor 7 and the rear end plate 11, and one end of the recovery passage 16 is connected to the cylindrical liquid of the heat generating chamber 15. The other end of the recovery passage 16 opens to the inner peripheral area of the storage chamber SR while opening to the close gap. The supply passage 17 is formed by a through hole formed in the front end wall of the rear rotor 9. One end of the supply passage 17 opens to the outermost peripheral region of the rear disk-shaped liquid-tight gap, while the supply passage 17 is opened. Is open to the outermost peripheral area of the storage chamber SR. In the storage chamber SR, a bimetal-type flapper valve 18 capable of closing the opening of the supply passage 17 on the storage chamber SR side by a rise in the temperature of the silicone oil is fixed to the rear rotor 9.

Here, in this viscous heater, the inner fixing member 4 is symmetrical with respect to the center line C (see FIG. 1), and the pulley portion 12 of the outer driving member 12 is formed.
The center of d is also located on the center line C. For this reason,
The shape of the viscous heater has a good balance before and after the center line C. In this viscous heater incorporated in the heating device of the vehicle, the rotational driving force is transmitted from the engine via the belt to the pulley portion 12 of the outer driving member 12.
When the cylindrical portion 12c and the like of the outer drive member 12 are rotated by being transmitted to the outer drive member 12, the inner drive member 12 is positioned between the inner surface of the outer drive member 12 and the outer surface of the inner fixed member 4 disposed radially inside the outer drive member 12. The silicone oil generates heat by shearing in the formed liquid-tight gap in the heat generating chamber 15, that is, in the front and rear disk ring-shaped liquid-tight gap and the cylindrical gap. This heat is exchanged with the cooling water passing through the spiral passage 6b of the water jacket WJ formed inside the inner fixing member 4, and the heated cooling water is supplied to the heating of the passenger compartment and the like in the heating circuit. The Rukoto.

As described above, in this viscous heater, the heat generating chamber 15 is formed radially inward of the outer driving member 12 which rotates by directly transmitting the rotational driving force.
Due to the rotation of 2, the silicone oil is sheared in the liquid-tight gap of the heat generating chamber 15. That is, the outer drive member 12
Has a function as a member for transmitting the rotational driving force and a member for applying a shear to the viscous fluid by rotation, and furthermore, a heating chamber 15 is formed inside the outer driving member 12 in the radial direction. For this reason, in this viscous heater, a member for transmitting a rotational driving force and a member for applying shear by rotation are not arranged in series in the axial direction unlike the conventional viscous heater, and the axial length is reduced. Can be achieved.
Therefore, this viscous heater can improve the mountability on a vehicle or the like in combination with the good balance between the center line C and the front and rear as described above.

In this viscous heater, the water jacket WJ is located radially inside, and the heat generating chamber 15 is located radially outside the water jacket WJ.
Here, in the cylindrical liquid-tight gap, R: cylindrical radius, L: cylindrical length, h ₁ : clearance (the inner peripheral surface of the cylindrical portion 12c of the front rotor 7 and the outer peripheral surface of the cylindrical portion 4e of the front stator 1) Ω: angular velocity, theoretical power in this cylindrical liquid-tight gap: K
₁ is represented by the following equation (1). Further, in the disk-ring-shaped liquid-tight gap, r: disk radius, h ₂ : clearance (between the rear end surface of the front flange portion 12b of the front rotor 7 and the front end surface of the front flange portion 4c of the front stator 1). (The distance between the front end face of the rear rotor 9 and the rear end face of the rear flange portion 4d of the rear stator 3), the theoretical power in this disc-ring liquid-tight gap: K
₂ is represented by the following equation (2).

K ₁ = 2πR ³ Lω ² / h ₁ (1) K ₂ = πr ⁴ ω ² / 2h ₂ (2) And the calorific value in the cylindrical liquid-tight gap: Q ₁ is the cylindrical liquid-tight gap Since the theoretical power at is proportional to K ₁ , and the calorific value at the disc-ring liquid-tight gap: Q ₂ is proportional to the theoretical power at the cylindrical liquid-tight gap: K ₂ ,
From the above equations (1) and (2), the calorific value of the silicone oil in the cylindrical liquid-tight gap: Q ₁ is proportional to R ^3, and the calorific value of the silicone oil in the disc-ring liquid-tight gap: Q ₂ is proportional to r ^4.

Therefore, it is more advantageous to increase the amount of generated heat when the heat generating chamber 15 is located further outside in the radial direction. Therefore, this viscous heater is advantageous in increasing the calorific value while suppressing an increase in the diameter of the viscous heater.
Furthermore, since the heat generation amount can be increased by locating the heat generation chamber 15 on the outside in the radial direction, the viscosity of the silicone oil can be reduced by an amount corresponding to the heat generation amount. Can be improved.

In this viscous heater, the storage chamber S
If the temperature of the silicone oil in R is low, the heating is too weak, and the flapper valve 18 opens the supply passage 17. If the outer drive member 12 is rotating, the silicone oil moves to the outer peripheral area due to centrifugal force in the storage chamber SR, so that the silicone oil is moved through the supply passage 17 opened to the outer peripheral area of the storage chamber SR. Silicone oil is positively supplied from the outer peripheral region to the outer peripheral region of the heat generating chamber 15. For this reason, in this viscous heater, it is possible to quickly spread the silicone oil to the outer peripheral area of the heat generating chamber 15. Therefore, the amount of heat generated in the heating chamber 15 increases (capacity expansion), and heating is enhanced. In addition, at this time, at the opening at one end of the recovery passage 16 that opens into the cylindrical liquid-tight gap of the heat generating chamber 15, suction force based on centrifugal force due to rotation of the outer driving member 12 acts, and In the inner peripheral area of the storage chamber SR whose other end is open, a flow of silicone oil that moves to the outer peripheral area by centrifugal force occurs, so that the silicone oil flows from the heat generating chamber 15 to the storage chamber SR via the recovery passage 16. Collected. Therefore, the heat generating chamber 15 is supplied through the recovery passage 16 and the supply passage 17.
The silicone oil is actively circulated between the storage chamber SR and the storage chamber SR, and the durability of the silicone oil is improved.

On the other hand, if the temperature of the silicone oil in the storage chamber SR rises, the heating becomes too strong, and the flapper valve 18 closes the supply passage 17. Therefore, the supply of the silicone oil from the storage chamber SR to the heat generation chamber 15 is stopped, and only the recovery of the silicone oil from the heat generation chamber 15 to the storage chamber SR is performed. Therefore, the amount of the silicone oil in the heat generating chamber 15 is reduced, the calorific value is reduced (capacity is reduced), and the heating is weakened.

As described above, this viscous heater is of a variable capacity type in which the supply of the silicone oil from the storage chamber SR to the heat generating chamber 15 is started or stopped by opening and closing the supply passage 17. Then, if the capacity is reduced, even if the outer drive member 12 maintains the high-speed rotation, the temperature of the silicone oil in the heat generating chamber 15 is suppressed from becoming high, and the deterioration is prevented.

In this viscous heater, the storage chamber S
Since the silicone oil exceeding the volume of the liquid-tight gap can be stored in the R, there is a margin in the amount of the silicone oil to be sheared, and it is not necessary to always shear only the specific silicone oil. Deterioration delay can be achieved. In the above-described embodiment, the recovery passage 16 is also provided with a bimetal-type frappe valve that can be opened due to a rise in the temperature of the silicone oil,
The opening or closing of the recovery passage 16 may start or stop the recovery of the silicone oil from the heat generating chamber 15 to the storage chamber SR.

Further, in this viscous heater, the cooling water flowing into the water jacket WJ from the water inlet port 4f is guided to the outer peripheral region by the guide passage and passes through the spiral passage 6b and the like along the inner surface of the inner fixing member 4. In the meantime, heat exchange is performed with the silicone oil in the heating chamber 15. The guide passage such as the spiral passage 6b partitioned by the inner surface of the inner fixing member 4 increases the passage length of the cooling water in the water jacket WJ and decreases the cross-sectional area of the passage. Heating room 15 provided on the side
The heat exchange rate with the silicone oil can be improved, and quick and efficient heating can be achieved.

This viscous heater has a cylindrical liquid-tight gap and front and rear disk-ring-shaped liquid-tight gaps. For this reason, by increasing the axial length of the cylindrical liquid-tight gap to some extent, it is possible to increase the amount of heat generated while avoiding an increase in the diameter of the heat generator, and to increase the disc-ring liquid-tight gap. By increasing the radial width of the heat generator to some extent, it is possible to increase the heat generation while avoiding an increase in the axial length of the heat generator. Therefore, when the size (shaft length and diameter) of the viscous heater is changed according to the space in the engine room of the vehicle, the shaft length and diameter can be set to some extent freely, and the degree of freedom of design change is increased. .

Further, in this viscous heater, when the cooling water enters the water jacket WJ from the water inlet port 4f, the cooling water enters the front recess 6c having a larger cross-sectional area from the water inlet port 4f having a smaller diameter. Also, the effect of suppressing the pulsation of the cooling water is exhibited. Therefore, according to the viscous heater, generation of abnormal noise, vibration, and the like due to pulsation of the circulating cooling water can be suppressed.

(Embodiment 2) The viscous heater of the present embodiment shown in FIG. 2 has a structure in which the recovery passage 16 is provided in the rear rotor 9, and the other configuration is the same as that of the above-described Embodiment 1. That is, the recovery passage 16 is formed by a through hole formed through the front end wall of the rear rotor 9, and one end of the recovery passage 16 is opened to the disc-ring liquid-tight gap behind the heating chamber 15, The other end of the passage 16 opens into the inner peripheral area of the storage room SR.

In this viscous heater, the flow of silicone oil that moves toward the inner circumference due to the Weissenberg effect in the rear disk-ring-like liquid-tight gap in the heat generating chamber 15 and the outer circumference due to the action of centrifugal force in the storage chamber SR. With the flow of the silicone oil moving to the side, the silicone oil is recovered from the heat generating chamber 15 to the storage chamber SR via the recovery passage 16.

Other functions and effects are the same as those of the first embodiment. (Embodiment 3) The viscous heater of the present embodiment shown in FIG. 3 has a storage chamber SR also provided on the front side, and a recovery passage 16 provided in a wall portion of a member constituting the outer driving member 12. Is similar to that of the first embodiment.

That is, in this viscous heater, the rear end of the intermediate rotor 19 having the cylindrical portion 12c and the pulley portion 12d is closed by the ring thick plate-shaped rear rotor 9 with a bolt (not shown) via the plate gasket 8, and the rear rotor 9 is closed by a ring thin rear end plate 11 by a bolt (not shown) via a plate gasket 10, while the front end of the intermediate rotor 19 is closed by a plate gasket 20.
The front end of the front rotor 21 is closed by a ring thin plate-shaped front end plate 23 by a bolt (not shown) via a plate gasket 22 with a bolt (not shown). The outer drive member 12 is constituted by the front rotor 21, the front end plate 23, the intermediate rotor 19, the rear rotor 9, and the rear end plate 11.
The front rotor 21 and the rear rotor 9 of the outer driving member 12 are rotatably supported by front and rear boss portions 4a and 4b of the inner fixing member 4 via bearing devices 13 and 14 with a built-in shaft sealing device.

The front end face of the front rotor 21 has a ring-shaped recess 2.
The front end plate 23 forms a closed front storage chamber SR with the front end plate 23. The supply passage 17 and the flapper valve 18 are also provided in the front storage room SR, similarly to the rear storage room SR. And the storage room S on the rear side
The R and the heat generating chamber 15 are communicated with each other by the intermediate rotor 19, the rear rotor 9 and the rear recovery passage 16 formed in the rear end plate 11. The front storage chamber SR and the heat generating chamber 15 are connected to each other by the intermediate rotor 19, The front rotor 21 and the front end plate 23 communicate with each other by a front recovery passage 16 formed in the front end plate 23.

In addition, with the above configuration, the outer driving member 12 as well as the inner fixing member 4 are formed to be line-symmetrical with respect to the center line C, and the shape of the viscous heater is balanced back and forth with respect to the center line C. Is extremely good. In this viscous heater, the recovery passage 16 is provided in a wall portion of a member constituting the outer driving member 12,
In addition, since the outer shape is symmetrical with respect to the center line C, the mountability to the vehicle is further improved.

Further, since there are two storage chambers SR, the life of the silicone oil can be further extended. Other functions and effects are the same as those of the first embodiment. (Embodiment 4) The viscous heater of the present embodiment shown in FIG. 4 differs from the viscous heater of Embodiment 3 described above in that the pulley is spaced apart in the centrifugal direction from the cylindrical portion 12c of the intermediate rotor 19 that divides the heat generating chamber 15 by its inner peripheral surface. The configuration is the same as that of the third embodiment except that the portion 12d is provided.

That is, in this viscous heater, an annular connecting portion 24 is formed on the outer peripheral surface of the cylindrical portion 12c of the intermediate rotor 19.
Are integrally protruded, and a pulley portion 12 d is integrally provided on the outer peripheral edge of the connecting portion 24. The connecting portion 24 has a plurality of through holes 24 at intervals in the circumferential direction.
a is penetrated. In this viscous heater, a pulley portion 12d is disposed at a distance in a centrifugal direction from a cylindrical portion 12c that divides the heat generating chamber 15 by its inner surface, and the connecting portion 24 is provided with a through hole 4a for heat insulation. As a result, the heat in the heat generating chamber 15 is not easily transmitted to the pulley portion 12d, and the thermal degradation of the belt applied to the pulley portion 12d can be suppressed.

Other functions and effects are the same as those of the third embodiment. In the first to fourth embodiments, by making the material of the member constituting the outer drive member 12 a resin having low heat conductivity, it is possible to more effectively suppress the thermal deterioration of the belt applied to the pulley portion 12d. Become.

[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]

4 inner fixing member (1 front stator, 3 rear stator) 12 outer driving member (7 front rotor, 9 rear rotor, 11 rear end plate, 19 intermediate rotor, 21 front rotor 21, front end plate 23 12d: Pulley 15: Heating chamber WJ: Heat radiating chamber (water jacket) SR: Storage chamber 16: Recovery passage 17: Supply passage

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hidefumi Mori 2-1-1 Toyota-cho, Kariya-shi, Aichi Pref. Inside Toyota Industries Corporation (72) Inventor Masami Niwa 2-1-1, Toyota-cho, Kariya-shi Aichi Pref. Inside Toyota Industries Corporation

Claims (9)

[Claims] 1. An inner fixing member in which a heat radiating chamber for circulating a circulating fluid is formed, and a heat generating chamber adjacent to the heat radiating chamber is formed between the inner fixing member and an outer surface of the inner fixing member. Are disposed radially outward of and are rotatably supported by the inner fixing member,
An outer driving member to which the rotational driving force is transmitted; and a liquid-tight gap between the outer surface of the inner fixed member and the inner surface of the outer driving member which is housed in the heat generating chamber and rotates the outer driving member. A heat generator comprising: a viscous fluid that generates heat by movement. 2. The storage device according to claim 1, further comprising a storage chamber that is in communication with the heat generation chamber through a recovery passage and a supply passage, and that can store the viscous fluid exceeding the volume of the liquid-tight gap. Heat generator. 3. The heat generator according to claim 2, wherein the storage chamber is provided in the outer driving member, and the supply passage is open to an outer peripheral area of the storage chamber. 4. The heat generator according to claim 2, wherein at least one of the recovery passage and the supply passage is openable and closable. 5. The radiating chamber is provided with a guide passage for guiding the circulating fluid to an outer peripheral area of the radiating chamber to circulate along the inner surface of the inner fixing member. The heat generator according to 1, 2, 3 or 4. 6. The device according to claim 1, wherein the outer driving member includes a cylindrical portion having an inner surface defining the heat generating chamber, and a pulley portion disposed on the cylindrical portion. 3,
6. The heat generator according to 4 or 5. 7. The cylinder according to claim 6, wherein the cylindrical portion and the pulley portion are connected by a connecting portion, and the pulley portion is disposed at a distance in a centrifugal direction from the cylindrical portion. Heat generator. 8. The liquid-tight gap according to claim 1, wherein at least a part of the liquid-tight gap is formed in a cylindrical shape between an outer peripheral side surface of the inner fixing member and an inner peripheral side surface of the outer driving member. The heat generator according to 1, 2, 3, 4, 5, 6, or 7. 9. The liquid-tight gap, wherein at least a part of the liquid-tight gap is formed in a disk ring shape between an outer end surface of the inner fixing member and an inner end surface of the outer driving member. The heat generator according to 1, 2, 3, 4, 5, 6, 7, or 8.