JPH08296569A - Trochoid pump, trochoid motor and flowmeter - Google Patents

Abstract

PURPOSE: To provide a trochoid pump that can obtain a large flow rate with small dimensions and can make the flow rate variable by simple movable mechanism. CONSTITUTION: An inner rotor 10 and an outer rotor 12 are meshed with each other. A plurarity of fluid flow holes 16 are formed at the inner rotor 10, and a fluid intake/discharge path member 20 is disposed radially inward of the inner rotor 10. The fluid intake-discharge path member 20 has a fluid intake manifold 22a and a fluid discharge manifold 22b formed in the axial positions corresponding to the fluid flow holes 16, and a fluid intake path and a fluid discharge path are formed in the state of respectively communicating with the manifolds 22a, 22b and also with a fluid intake port 6 and a fluid discharge port 6. The outer rotor 12 is rotatory-driven by a driving rotary shaft 14. The fluid intake-discharge path member 20 can be rotated in relation to the inner rotor 10 by an operating lever 33.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trochoid pump, a trochoid motor and a flow meter.

[0002]

2. Description of the Related Art A trochoid pump is one of the inward gear pumps. In a conventional trochoid pump, an inner rotor having a trochoidal tooth profile and an outer rotor are rotatably mounted in a casing by meshing with each other. By forming a fluid suction path and a fluid discharge path in the casing in an appropriate circumferential angular range outside in the radial direction of the outer rotor, and by rotating the inner rotor or the outer rotor by driving. , Sucks fluid into the pump compartment formed between the inner rotor and the outer rotor from the fluid suction passage via the fluid circulation hole, and discharges the fluid from the pump compartment to the fluid discharge passage via the fluid circulation hole I am trying to let you do it.

In such a conventional trochoid pump, since the pump compartment is connected to the fluid suction passage and the fluid discharge passage radially outward of the outer rotor, the size is large relative to the flow rate. was there. Such problems also exist in trochoid motors and flowmeters having the same structure.

Further, in the conventional trochoid pump, the flow rate is not variable, and if the flow rate is variable, a complicated or large movable mechanism is required. Similarly, the conventional trochoid motor is not capable of shifting, and the conventional flowmeter having the same mechanism is not capable of measuring range,
Further, if gear shifting is possible or the measurement range is variable, there is a problem that a complicated or large-sized movable mechanism is required.

Therefore, an object of the present invention is to provide a trochoid pump, a trochoid motor or a flowmeter capable of obtaining a large flow rate with a small size.

It is another object of the present invention to provide a trochoid pump which can change the flow rate by a simple and small-sized movable mechanism.

A further object of the present invention is to provide a trochoid motor which can be shifted by a simple and small moving mechanism.

A further object of the present invention is to provide a flow meter whose measuring range can be changed by a simple and small-sized movable mechanism.

[0009]

According to the present invention, in order to achieve the above object, an inner rotor and an outer rotor having a trochoidal tooth profile are engaged with each other and are rotatably mounted in a casing. The inner rotor is formed with a plurality of fluid passage holes penetrating in the radial direction arranged in the circumferential direction, and a fluid suction / discharge passage member is arranged radially inward of the inner rotor. The inner rotor is rotatable relative to the fluid suction / discharge passage member, and a first angular range in the circumferential direction is provided on the outer peripheral portion of the fluid suction / discharge passage member at an axial position corresponding to the fluid circulation hole. A fluid intake manifold is formed in the first and second fluid intake manifolds are formed in a second angular range in the circumferential direction. A fluid suction path and a fluid discharge path that communicate with the manifold and the fluid discharge manifold, respectively, and connect with the fluid suction port and the fluid discharge port for external connection are formed, and drive the inner rotor or the outer rotor. Provided is a trochoid pump, which is characterized by being a rotating body.

In an aspect of the trochoid pump according to the present invention, the fluid passage hole is formed in a valley portion of the tooth profile of the inner rotor.

In one aspect of the trochoid pump according to the present invention, the fluid suction / discharge passage member is rotatable about the rotation center of the inner rotor.

In one aspect of the trochoid pump according to the present invention, operating means for rotating the fluid suction / discharge passage member is provided.

In one aspect of the trochoid pump according to the present invention, the fluid suction port and the fluid discharge port are formed in the casing, and the fluid suction and discharge passage member corresponds to the fluid suction port and the fluid discharge port. And a fluid suction groove and a fluid discharge groove are formed on the outer peripheral portion of the fluid suction / discharge passage member at axial positions corresponding to the fluid suction port and the fluid discharge port, respectively. The fluid suction groove and the fluid discharge groove communicate with the fluid suction path and the fluid discharge path, respectively.

Further, according to the present invention, in order to achieve the above object, an inner rotor having a trochoidal tooth profile and an outer rotor are engaged with each other and are rotatably mounted in a casing. A plurality of fluid passage holes penetrating in the radial direction are arranged in the circumferential direction, and a fluid supply / discharge path member is arranged radially inward of the inner rotor. The inner rotor is rotatable relative to the member, and the fluid supply manifold is provided on the outer peripheral portion of the fluid supply / discharge path member in the first angular range in the circumferential direction at the axial position corresponding to the fluid flow hole. And a fluid discharge manifold is formed in a second angular range in the circumferential direction, and the fluid supply manifold has the fluid supply manifold. A fluid supply port and a fluid discharge route for communicating with the outside and a fluid discharge port for communicating with the outside, respectively, and outputs the inner rotor or the outer rotor. Provided is a trochoid motor, which is characterized by being a rotating body.

In one aspect of the trochoid motor according to the present invention, the fluid circulation hole is formed in a valley portion of the tooth profile of the inner rotor.

In one aspect of the trochoid motor according to the present invention, the fluid supply / discharge path member is rotatable around the rotation center of the inner rotor.

In one aspect of the trochoid motor according to the present invention, operation means for rotating the fluid supply / discharge path member is provided.

In an aspect of the trochoid motor according to the present invention, the fluid supply port and the fluid discharge port are formed in the casing, and the fluid supply / discharge path member corresponds to the fluid supply port and the fluid discharge port. And a fluid supply groove and a fluid discharge groove are formed on the outer peripheral portion of the fluid supply / discharge path member at axial positions corresponding to the fluid supply port and the fluid discharge port, respectively. The fluid supply groove and the fluid discharge groove communicate with the fluid supply path and the fluid discharge path, respectively.

Further, according to the present invention, in order to achieve the above object, an inner rotor having a trochoidal tooth profile and an outer rotor are engaged with each other and are rotatably mounted in a casing. A plurality of fluid passage holes penetrating in the radial direction are arranged in the circumferential direction, and a fluid supply / discharge path member is arranged radially inward of the inner rotor. The inner rotor is rotatable relative to the member, and the fluid supply manifold is provided on the outer peripheral portion of the fluid supply / discharge path member in the first angular range in the circumferential direction at the axial position corresponding to the fluid flow hole. And a fluid discharge manifold is formed in a second angular range in the circumferential direction, and the fluid supply manifold has the fluid supply manifold. A fluid supply path and a fluid discharge path for communicating with the outside and the fluid discharge manifold for communicating with the outside, respectively, and the rotation of the inner rotor or the outer rotor. A flow meter, characterized in that it comprises a detection means for detecting a number or a rotation speed.

In one embodiment of the flow meter according to the present invention,
The fluid circulation holes are formed in the valleys of the tooth profile of the inner rotor.

In one embodiment of the flow meter according to the present invention,
The fluid supply / discharge path member is rotatable about the center of rotation of the inner rotor.

In one embodiment of the flow meter according to the present invention,
Operation means for rotating the fluid supply / discharge path member is provided.

In one embodiment of the flow meter according to the present invention,
The casing is formed with the fluid supply port and the fluid discharge port, and the fluid supply and discharge route member extends to an axial position corresponding to the fluid supply port and the fluid discharge port. A fluid supply groove and a fluid discharge groove are formed on the outer peripheral portion of the member at axial positions corresponding to the fluid supply port and the fluid discharge port, respectively. It is in communication with the path and the fluid discharge path.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view showing an embodiment of the trochoid pump according to the present invention, and FIGS. 2, 3, 4 and 5 are sectional views showing the assembled state of the trochoid pump. FIG. 6 is a schematic diagram for explaining the operation of this embodiment.

In these figures, 2 is a first casing member and 4 is a second casing member, which are joined by bolts and integrated to form a casing. A fluid suction port 6 and a fluid discharge port 8 are attached to the second casing member 4. The fluid is oil, for example.

The inner rotor 1 is placed in the cavity in the casing.
0 and the outer rotor 12 are arranged. The outer teeth of the inner rotor 10 and the inner teeth of the outer rotor 12 are formed and arranged in a trochoid curve shape. An end face plate is attached to the Y direction end of the outer rotor 12, and a drive rotating shaft 14 that extends in the Y direction is attached to the end face plate. The drive rotary shaft 14 penetrates the first casing member 2 and is rotatably supported by the first casing member 2 via a bearing. The drive rotary shaft 14 is connected to an output shaft of a rotary drive source such as a motor (not shown) via a clutch or the like as necessary. Further, the inner rotor 10 is formed with a fluid passage hole 16 penetrating in a radial direction in a valley portion of its outer teeth.

In the present specification, the axial direction, the circumferential direction and the radial direction are all drive rotary shaft 1 unless otherwise specified.
4 (or a direction corresponding thereto), that is, the XY directions are set as the axial direction.

A fluid intake / discharge path member 20 is arranged in the casing. The fluid intake / discharge path member 20
Consists of a first portion 21A located radially inward of the inner rotor 10 and a second portion 21B located radially inward of the second casing member 4. A fluid suction manifold 22a and a fluid discharge manifold 22b are symmetrically formed in the fluid suction / discharge path member first portion 21A in a plane orthogonal to the XY directions. These manifolds are XY
It has a shape close to a semi-circle in a plane orthogonal to the direction, and a partition wall 22c extending in the AB direction is formed in the middle thereof, and the fluid intake manifold 22a and the fluid discharge manifold 22b communicate with each other. I haven't. The fluid intake / discharge path member 20 includes the fluid intake manifold 22.
A fluid suction passage 24a and a fluid discharge passage 24b which communicate with a and the fluid discharge manifold 22b and extend in the XY directions are formed. Further, in the fluid suction / discharge path member second portion 21B, at the XY-direction positions corresponding to the fluid suction port 6 and the fluid discharge port 8, over the appropriate angular range in the circumferential direction, the fluid suction groove 26a and the fluid discharge groove 26b. Are formed. The fluid suction groove 26a and the fluid discharge groove 26b are respectively provided in the fluid suction path 24a.
And the fluid discharge path 24b.

A first end face plate member 30 and a second end face plate member 32 are provided at the X direction end of the fluid suction / discharge passage member 20.
Are attached with two bolts 34a and 34b. The bolts 34a and 34b also have a function of closing the X-direction open ends of the fluid suction passage 24a and the fluid discharge passage 24b. The outer peripheral edge of the first end face plate member 30 is slidable with respect to the second casing member 4. An operation lever 33 is attached to the second end face plate member 32, and the operation lever 3
The fluid intake / discharge path member 20 can be rotated with respect to the casing by rotating 3 in the circumferential direction within an appropriate angle range.

The operation of this embodiment will be described with reference to FIGS.

First, as shown in FIG. 6A, it is assumed that the operating lever 33 is at the maximum flow rate (max) position. At this time, the partition wall 22 of the fluid intake / discharge path member 20
c is oriented in the AB direction, as shown in FIGS. 4 and 6 (a). When the drive rotation shaft 14 is rotated counterclockwise when viewed in the Y direction, the inner rotor 10 and the outer rotor 12 rotate counterclockwise as shown by the arrows in FIG. Along with this, in the left half of FIG. 4, the volume of the pump compartment formed between the inner rotor 10 and the outer rotor 12 gradually increases. The fluid is sucked into the pump compartment from the fluid circulation hole 16 of the inner rotor 10 through the passage 24a and the fluid suction manifold 22a. On the other hand, in the right half portion in FIG. 4, the volume of the pump compartment formed between the inner rotor 10 and the outer rotor 12 gradually decreases, so that the fluid circulation hole 1 of the inner rotor 10
6 to the fluid discharge manifold 22b, the fluid discharge path port 2
The fluid is discharged from the fluid discharge port 8 to the outside through the 4b and the fluid discharge groove 26b.

Next, as shown in FIG. 6B, it is assumed that the operating lever 33 is at the position of the minimum flow rate (min). At this time, the partition wall 22 of the fluid intake / discharge path member 20
As shown in FIG. 5 and FIG. 6B, c is oriented in the direction orthogonal to the AB direction. When the drive rotation shaft 14 is rotated counterclockwise when viewed in the Y direction, the inner rotor 10 and the outer rotor 12 rotate counterclockwise as shown by the arrow in FIG. Along with this, the volume of the pump compartment formed between the inner rotor 10 and the outer rotor 12 gradually increases in the left half portion in FIG. 5, and the inner rotor 10 and the outer rotor portion in the right half portion in FIG. The volume of the pump compartment formed with 12 gradually decreases. Therefore, the amount of fluid sucked into the pump compartment from the fluid suction manifold 22a in the lower left portion of FIG.
Since the amount of fluid discharged from the pump compartment to the fluid intake manifold 22a is equal in the lower right portion of the inside,
The amount of the fluid sucked through the fluid suction path 24a becomes zero. Further, the amount of fluid sucked from the fluid discharge manifold 22b into the pump compartment in the upper left portion in FIG. 5 and discharged from the pump compartment into the fluid discharge manifold 22b in the upper right portion in FIG. Since the amount of the fluid becomes equal to that of the fluid, the amount of the fluid discharged through the fluid discharge path 24b becomes zero.

According to this embodiment as described above, no connection is made to the fluid suction passage and the fluid discharge passage outside the outer rotor 12 in the radial direction, and the fluid suction passage is formed inside the inner rotor 10 in the radial direction. Path 24a and fluid discharge path 2
Since it is connected to 4b, the device size can be reduced for the flow rate. In addition, the pump flow rate is determined by using a simple configuration in which the fluid intake / discharge path member 20 arranged radially inward of the inner rotor 10 is rotated.
It can be changed easily. Further, since the fluid is sucked into the compartment outward in the radial direction, good suction efficiency can be obtained based on the centrifugal force.

7 and 8 are partially exploded perspective views showing an embodiment of the trochoid motor according to the present invention.
9 is a perspective view showing the assembled state of the trochoid motor, and FIGS. 10 and 11 are sectional views showing the assembled state of the trochoid pump. In these drawings, members having the same functions as those in FIGS. 1 to 6 are designated by the same reference numerals. The trochoid motor of this embodiment is shown by combining FIGS. 7 and 8.

In this embodiment, a fluid supply / discharge path member 20 'is integrally formed with the first casing member 2'. Then, the second casing member 4 ′ has a bearing 17 with respect to the outer peripheral surface of the fluid supply / discharge path member 20 ′.
It is attached so as to be rotatable via A and 17B.
The outer rotor 12 is fixed to the second casing member 4 ′ by bolts, and the inner rotor 10 is arranged so as to be slidably rotatable with respect to the outer peripheral surface of the fluid supply / discharge path member 20 ′. 19 is a spacer ring,
3A and 3B are presser plates.

The fluid supply / discharge path member 20 ′ has a fluid supply manifold 22 similar to the trochoid pump.
a'and a fluid discharge manifold 22b 'are formed, and a partition wall 22c' is formed between them. Further, the fluid supply / discharge path member 20 ′ includes the fluid supply manifold 22a ′ and the fluid discharge manifold 22b ′.
A fluid supply path 24a 'and a fluid discharge path 24b' that communicate with each other and extend in the XY directions are formed. These fluid supply path 24a 'and fluid discharge path 24
In b ', a fluid supply port 6'and a fluid discharge port 8', respectively.
Are in communication.

In this embodiment, when the fluid is supplied from the fluid supply port 6 ', the fluid passes through the fluid supply path 24a' and the fluid supply manifold 22a 'and through the fluid circulation hole 16 which can communicate with the fluid supply manifold 22a'. Is supplied to the compartment between the inner rotor 10 and the outer rotor 12, whereby torque for rotating the inner rotor 10 and the outer rotor 12 in the counterclockwise direction in FIG. 11 is increased in order to increase the volume of the compartment. appear. That is, the arrangement of the inner rotor 10, the outer rotor 12, and the fluid supply / discharge path member 20 'is set so that the torque is generated. The fluid is supplied to the left half compartment in FIG. 11, and the fluid circulation hole 16 and the fluid discharge manifold 22b ′ are supplied from the right half compartment in FIG. 11 along with the rotation of the rotor.
The fluid is discharged to the outside from the fluid discharge port 8'through the fluid discharge path 24b '. As a result, the second casing member 4 ′ fixed to the outer rotor 12 is rotated. The second casing member 4'is connected to the input shaft of the driven device via a clutch (not shown) or the like.

In this embodiment, the fluid supply / discharge path member 20 '
Is fixed to the first casing member 2 ', but as described in the embodiment of the trochoid pump, by making it rotatable, the rotation of the second casing member 4'with respect to the fluid supply amount. The ratio of the numbers can be freely changed, which realizes the variable speed motor with a simple mechanism.

According to the present embodiment as described above, the fluid supply path and the fluid discharge path are not connected to the outer rotor 12 in the radial direction, and the fluid is supplied to the inner rotor 10 in the radial direction. Since the path 24a 'and the fluid discharge path 24b' are connected, the device size can be reduced for the flow rate. In addition, the gear shifting is performed by using a simple structure in which the fluid supply / discharge path member 20 ′ arranged radially inward of the inner rotor 10 is rotated.
It can be done easily.

FIG. 12 is a partially cutaway exploded perspective view showing an embodiment of the flow meter according to the present invention, FIG. 13 is a side view showing an assembled state of this flow meter, and FIGS. 14 and 15 are both. It is sectional drawing which shows the assembled state of this flowmeter. In these figures, members having the same functions as those in FIGS. 1 to 11 are designated by the same reference numerals.

In this embodiment, the fluid supply / discharge path member 20 "is integrally formed with the second casing member 4". The fluid supply / discharge path member 20 ″ has a fluid supply manifold 22 symmetrically in a plane orthogonal to the XY directions.
a "and a fluid discharge manifold 22b" are formed. These manifolds have a shape close to a semi-circle in a plane orthogonal to the XY directions, and a partition wall 22c ″ extending in the AB direction is formed in the middle thereof to form the fluid supply manifold 22a ″ and the fluid discharge manifold 22a ″. Manifold 22b "
And are not in communication with each other. Fluid supply / discharge path member 2
At 0 ", a fluid supply path 24a" and a fluid discharge path 24, which communicate with the fluid supply manifold 22a "and the fluid discharge manifold 22b" and extend in the XY directions, respectively.
b ”is formed. The fluid supply path 24a ″ and the fluid discharge path 24b ″ communicate with the fluid supply port 6 ″ and the fluid discharge port 8 ″, respectively.

An end face plate is attached to the end of the outer rotor 12 in the Y direction, and a rotary shaft 42 extending in the Y direction is attached to the end face plate. The rotary shaft 42 penetrates the first casing member 2 and is rotatably supported by the first casing member 2 via a bearing. A tachometer 44 is provided on the end surface of the first casing member 2 in the Y direction.
Is attached. A rotary plate 46 of a tachometer 44 is attached to the tip of the rotary shaft 42 in the Y direction.
The rotation speed of No. 4 is measured by the electric measuring unit 48 to obtain an electric signal, and based on this, the display unit 50 displays it.

In this embodiment, when the fluid is supplied from the fluid supply port 6 ", the fluid passes through the fluid supply path 24a" and the fluid supply manifold 22a "and through the fluid circulation hole 16 which can communicate with the fluid supply manifold 22a". Is supplied to the compartment between the inner rotor 10 and the outer rotor 12, whereby torque for rotating the inner rotor 10 and the outer rotor 12 counterclockwise in FIG. 15 to increase the volume of the compartment is provided. appear. That is, the arrangement of the inner rotor 10, the outer rotor 12, and the fluid supply / discharge path member 20 ″ is set so that the above torque is generated. The fluid is supplied to the left half compartment in FIG. From the compartment in the right half of FIG. 15, the fluid circulation hole 16 and the fluid discharge manifold 22b ″ are rotated along with the rotation of the rotor.
Then, the fluid is discharged to the outside from the fluid discharge port 8'through the fluid discharge path 24b ". As a result, the rotating shaft 42 fixed to the outer rotor 12 is rotated, and the rotation speed is measured by the tachometer 44. (Corresponding to the flow rate of) is measured.

In this embodiment, the fluid supply / discharge path member 20 "
Is fixed to the second casing member 4 ″, but as described in the embodiment of the trochoid pump, by making it rotatable, the ratio of the number of rotations of the rotary shaft 42 to the fluid supply amount. Can be freely changed, and according to this, a flowmeter with a variable measurement range can be realized with a simple mechanism.

According to the present embodiment as described above, the fluid supply path and the fluid discharge path are not connected to the outer rotor 12 in the radial direction, and the fluid is supplied to the inner rotor 10 in the radial direction. Since the path 24a "and the fluid discharge path 24b" are connected, the device size can be reduced for the flow rate. Further, the measurement range can be easily changed by using a simple configuration in which the fluid supply / discharge path member 20 ″ arranged radially inward of the inner rotor 10 is rotated.

[0047]

As described above, according to the present invention, since the fluid suction passage and the fluid discharge passage are connected to the inner rotor in the radial direction, the size of the apparatus is reduced for the flow rate. be able to. Further, the flow rate can be easily changed by using a simple structure of rotating the fluid intake / discharge path member and the fluid supply / discharge path member arranged inward of the inner rotor in the radial direction. A trochoid pump capable of variable flow rate, a trochoid motor capable of variable speed, and a flow meter capable of variable measurement range are provided by a movable mechanism having a small size.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a trochoid pump according to the present invention.

FIG. 2 is a sectional view showing an assembled state of an embodiment of a trochoid pump according to the present invention.

FIG. 3 is a sectional view showing an assembled state of an embodiment of a trochoid pump according to the present invention.

FIG. 4 is a sectional view showing an assembled state of an embodiment of a trochoid pump according to the present invention.

FIG. 5 is a sectional view showing an assembled state of an embodiment of a trochoid pump according to the present invention.

FIG. 6 is a schematic diagram for explaining the operation of one embodiment of the trochoid pump according to the present invention.

FIG. 7 is a partially exploded perspective view showing an embodiment of a trochoid motor according to the present invention.

FIG. 8 is a partial exploded perspective view showing an embodiment of a trochoid motor according to the present invention.

FIG. 9 is a perspective view showing an assembled state of an embodiment of a trochoid motor according to the present invention.

FIG. 10 is a sectional view showing an assembled state of an embodiment of a trochoid motor according to the present invention.

FIG. 11 is a sectional view showing an assembled state of an embodiment of a trochoid motor according to the present invention.

FIG. 12 is a partially cutaway exploded perspective view showing an embodiment of a flow meter according to the present invention.

FIG. 13 is a side view showing the assembled state of the embodiment of the flowmeter according to the present invention.

FIG. 14 is a sectional view showing an assembled state of an embodiment of the flowmeter according to the present invention.

FIG. 15 is a sectional view showing an assembled state of an embodiment of the flowmeter according to the present invention.

[Explanation of symbols]

 2, 2'First casing member 3A, 3B Presser plate 4, 4 ', 4 "Second casing member 6 Fluid suction port 6', 6" Fluid supply port 8 Fluid discharge port 8 ', 8 "Fluid discharge port 10 Inner Rotor 12 Outer rotor 14 Drive rotation shaft 16 Fluid flow holes 17A, 17B Bearing 19 Spacer ring 20 Fluid suction / discharge path member 20 ′, 20 ″ Fluid supply / discharge path member 21A First portion 21B Second portion 22a Fluid suction manifold 22a ′, 22a "fluid supply manifold 22b fluid discharge manifold 22b ', 22b" fluid discharge manifold 22c, 22c', 22c "partition wall 24a fluid suction path 24a ', 24a" fluid supply path 24b fluid discharge path 24b', 24b "fluid discharge path 26a Fluid suction groove 26b Fluid discharge groove 30 1 the end plate member 32 and the second end surface plate member 33 the operating lever 34a, 34b the bolt 42 rotation shaft 44 rotating meter 46 rotates plate 48 electrically measuring unit 50 display unit

Claims (15)

[Claims] 1. An inner rotor having a trochoidal tooth profile and an outer rotor are meshed with each other and are rotatably mounted in a casing. The inner rotor is provided with a plurality of fluid passage holes penetrating in a radial direction. Are arranged in a direction, and a fluid suction / discharge path member is arranged radially inward of the inner rotor, and the inner rotor is rotatable relative to the fluid suction / discharge path member. A fluid suction manifold is formed in a first angular range in the circumferential direction at an axial position corresponding to the fluid flow hole, and a second angular range in the circumferential direction on the outer peripheral portion of the fluid suction / discharge path member. A fluid discharge manifold is formed in the fluid suction manifold, and the fluid suction manifold is communicated with the fluid suction manifold and the fluid discharge manifold, respectively. A fluid suction path and a fluid discharge path that are respectively in communication with the fluid suction port and the fluid discharge port for connection with the above are formed, and the inner rotor or the outer rotor serves as a driving rotor. , Trochoid pump. 2. The trochoid pump according to claim 1, wherein the fluid circulation hole is formed in a valley portion of the tooth profile of the inner rotor. 3. The trochoid pump according to claim 1, wherein the fluid suction / discharge passage member is rotatable about a rotation center of the inner rotor. 4. The trochoid pump according to claim 3, further comprising operation means for rotating the fluid suction / discharge passage member. 5. The fluid suction port and the fluid discharge port are formed in the casing, and the fluid suction and discharge path member extends to axial positions corresponding to the fluid suction port and the fluid discharge port, A fluid suction groove and a fluid discharge groove are formed on the outer peripheral portion of the fluid suction and discharge passage member at axial positions corresponding to the fluid suction port and the fluid discharge port, respectively. 5. The trochoid pump according to claim 3, wherein the trochoid pump communicates with the fluid suction path and the fluid discharge path, respectively. 6. An inner rotor and an outer rotor each having a trochoidal tooth profile are engaged with each other so as to be rotatable in a casing, and the inner rotor is provided with a plurality of fluid passage holes penetrating in a radial direction. The inner rotor is disposed radially inward of the inner rotor, and the fluid supply / discharge path member is arranged radially inward of the inner rotor. The inner rotor is rotatable relative to the fluid supply / discharge path member. A fluid supply manifold is formed on the outer peripheral portion of the fluid supply / discharge path member in a first angular range in the circumferential direction at an axial position corresponding to the fluid flow hole, and a second angular range in the circumferential direction. A fluid discharge manifold is formed in the fluid supply manifold, and the fluid supply and discharge path member communicates with the fluid supply manifold and the fluid discharge manifold, respectively. A fluid supply path and a fluid discharge path for communicating with a fluid supply port and a fluid discharge port, respectively, for connection with the inner rotor or the outer rotor, and the inner rotor or the outer rotor serves as an output rotor. , Trochoid motor. 7. The trochoidal motor according to claim 6, wherein the fluid circulation hole is formed in a valley portion of a tooth profile of the inner rotor. 8. The trochoidal motor according to claim 6, wherein the fluid supply / discharge path member is rotatable about a rotation center of the inner rotor. 9. The trochoid motor according to claim 8, further comprising operating means for rotating the fluid supply / discharge path member. 10. The fluid supply port and the fluid discharge port are formed in the casing, and the fluid supply and discharge path member extends to axial positions corresponding to the fluid supply port and the fluid discharge port, A fluid supply groove and a fluid discharge groove are formed on the outer peripheral portion of the fluid supply and discharge path member at axial positions corresponding to the fluid supply port and the fluid discharge port, respectively. 10. The trochoidal motor according to claim 8 or 9, characterized in that each communicates with the fluid supply path and the fluid discharge path. 11. An inner rotor having a trochoidal tooth profile and an outer rotor are meshed with each other and are rotatably mounted in a casing. The inner rotor has a plurality of fluid passage holes penetrating in a radial direction. The inner rotor is disposed radially inward of the inner rotor, and the fluid supply / discharge path member is arranged radially inward of the inner rotor. The inner rotor is rotatable relative to the fluid supply / discharge path member. A fluid supply manifold is formed on the outer peripheral portion of the fluid supply / discharge path member in a first angular range in the circumferential direction at an axial position corresponding to the fluid flow hole, and a second angular range in the circumferential direction. A fluid discharge manifold is formed in the fluid supply manifold, and the fluid supply and discharge path member communicates with the fluid supply manifold and the fluid discharge manifold, respectively. A fluid supply path and a fluid discharge path that are respectively in communication with the fluid supply port and the fluid discharge port for connection with the section, and a detection means for detecting the rotation speed or rotation speed of the inner rotor or the outer rotor. A flow meter characterized by being provided. 12. The flowmeter according to claim 11, wherein the fluid circulation hole is formed in a valley portion of the tooth profile of the inner rotor. 13. The flowmeter according to claim 11, wherein the fluid supply / discharge path member is rotatable around a rotation center of the inner rotor. 14. The flowmeter according to claim 13, further comprising an operating means for rotating the fluid supply / discharge path member. 15. The casing is formed with the fluid supply port and the fluid discharge port, and the fluid supply and discharge path member extends to axial positions corresponding to the fluid supply port and the fluid discharge port, A fluid supply groove and a fluid discharge groove are formed on the outer peripheral portion of the fluid supply and discharge path member at axial positions corresponding to the fluid supply port and the fluid discharge port, respectively. 15. The flowmeter according to claim 13 or 14, characterized in that each communicates with the fluid supply path and the fluid discharge path.