JP2516429Y2 - Fluid machinery - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid machine such as a blower device for performing aeration.

[0002]

2. Description of the Related Art In a fluid machine such as a Roots blower device, a bearing case is attached to each opening of both ends of a substantially cylindrical casing having a suction port and a discharge port formed in its body, and is housed in the casing. Both ends of the rotary shaft of the book rotor are rotatably supported while being inserted into the bearing case. By rotating the two rotors, air is sucked into the casing through the suction port and discharged through the discharge port.

[0003]

However, in the conventional blower device, the casing is hermetically sealed except the suction port and the discharge port in the assembled state.
There is a problem in that it is not possible to actually measure the gap size between the rotor and the bearing case (hereinafter referred to as “side clearance”). For this reason, a trial operation was purposely performed to measure the discharge pressure and the air volume to indirectly determine the suitability of the side clearance.

On the other hand, in order that the side clearance can be measured after assembly, the diameter of the suction port or the discharge port of the casing is made large so that the gap gauge can be inserted from the suction port or the discharge port to the side clearance measuring position. Blower devices that have been considered are considered. However, if the suction port or the discharge port is formed large, a connection member for absorbing the dimensional difference between the suction port and the discharge port when connecting the suction pipe or the discharge pipe is required,
There is a problem in that the cost is increased accordingly.

An object of the present invention is to provide a fluid machine such as a blower device which solves the above-mentioned problems of the prior art, can easily measure the side clearance after assembly, and can reduce the cost.

[0006]

According to the invention, a bearing case is attached to both end openings of a substantially cylindrical casing having a peripheral wall portion formed with an inlet and an outlet, and a rotor housed in the casing. Fluid whose rotation shaft is rotatably supported in a state of being inserted into the bearing case, and fluid is sucked into the casing from the suction port by the rotation of the rotor and discharged from the discharge port. In the machine, in order to achieve the above object, in the peripheral wall portion of the casing, while forming a gap gauge insertion port corresponding to the gap between the bearing case and the rotor,
A closing member is detachably attached to the gap gauge insertion port.

[0007]

In the fluid machine of the present invention, a gap gauge insertion port is formed in the peripheral wall portion of the casing so as to correspond to the gap between the bearing case and the rotor, and a closing member is detachably attached to the gap gauge insertion port. As a result, the gap gauge can be inserted into the gap between the rotor and the bearing case by a simple operation of removing the blocking member and inserting the gap gauge through the gap gauge insertion port.

Further, since the diameter of the suction port or the discharge port is not changed, when the suction pipe or the discharge pipe or the like is connected to the suction port or the discharge port, the connection for absorbing the dimensional difference between the two. No parts required.

[0009]

1 is a perspective view showing a roots blower device to which a fluid machine according to an embodiment of the present invention is applied. As shown in the figure, this roots blower device is configured such that air is sucked into the casing 1 through the suction pipe 50 and discharged through the discharge pipe 60.

2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is shown in FIG.
5 is a sectional view taken along line BB of FIG. 4, FIG. 4 is a sectional view taken along line CC of FIG.
FIG. 5 is an exploded view of the main part of FIG. 4. As shown in these drawings, the substantially cylindrical casing 1 has a suction port 5 to which the suction pipe 50 (see FIG. 1) is connected, on the upper side of the peripheral wall thereof, and the discharge pipe on the lower side. The discharge port 6 to which 60 (see FIG. 1) is connected is formed. Further, on the upper side of the casing 1, four gauge insertion openings 21 for inserting the gap gauges 30 (see FIG. 5) are formed respectively corresponding to both ends of two rotors 7 and 8 described later. ,
A closing member such as a bolt 22 is screwed into each gauge insertion port 21.

On the other hand, as shown in FIG. 6, the two rotors 7 and 8 each have three twisted grooves 7a and 8a on the outer circumference thereof.
Is formed. And both rotary shafts 7 of both rotors 7 and 8
b and 8b are arranged in parallel in the same horizontal plane,
The rotors 7 and 8 are housed in the casing 1 as shown in FIGS. 2 and 3 in a state where the rotors 7 and 8 are out of phase with each other and engaged with each other. Both rotating shafts 7b and 8b penetrate the bearing cases 3 and 4, respectively, and are rotatably supported by the bearing cases 3 and 4 via bearings 9 and 10 on the opposite side to the mounting surface of the casing 1. It

An oil stopper 11 is attached to the front end opening of the bearing case 3 on one side so as to seal the bearing 9. Further, the rotating shafts 7b and 8b penetrate the oil stopper 11 and mesh with the end portions of the penetration side thereof.
4, 14 are attached. A gear case 15 is attached to the bearing case 3 so as to cover both gears 14, 14.

A bearing cover 20 is attached to the opening on the other end of the bearing case 4 so as to seal the bearing 10. Further, the other end of the rotating shaft 7b on one side is
The bearing cover 16 is penetrated and arranged outside. The rotary shaft 7b and the rotary drive shaft of the motor 70 (see FIG. 1) are connected via a power transmission mechanism 80 (see FIG. 1) such as a pulley and a belt.

In this roots blower device, the motor 7
When 0 is rotationally driven, the rotary shaft 7b on one side rotates via the power transmission mechanism 80, and the rotary shaft 8b on the other side rotates via the gears 14, 14 so as to be opposite to the rotary shaft 7b on one side. To do. As a result, the rotors 7 and 8 rotate reciprocally and the outside air is sucked into the casing 1 through the suction pipe 50 (see FIG. 1) and the suction port 5, and the air is rotated as the rotors 7 and 8 rotate. After being continuously fed to the discharge port 6 side along the twisted grooves 7a and 8a, it is discharged to the outside through a discharge pipe 60 (see FIG. 1).

According to this roots blower device, the gauge insertion holes 21 are formed in the casing 1 so as to correspond to both ends of the rotors 7 and 8, and the bolts 2 are attached to the gauge insertion holes 21.
As shown in FIG. 5, the bolt 22
Is removed to open the gauge insertion port 21, and the gap gauge 30 is inserted from the gauge insertion port 21.
The gap gauge 30 can be inserted in the gap between the rotors 7 and 8 and the bearing cases 3 and 4. Therefore, even after the blower device is assembled, it is possible to easily measure the clearance dimension (side clearance) between the rotors 7 and 8 and the bearing cases 3 and 4.

Further, since the diameter of the suction port 5 or the discharge port 6 is not changed, when connecting the suction pipe 50 or the discharge pipe 60 to the suction port 5 or the discharge port 6, a dimensional difference between the two is eliminated. The cost can be reduced without requiring a connecting member for absorption.

While the blower device is being driven, the gauge insertion ports 21 are closed by the bolts 22, so that the inside of the casing 1 is kept airtight.

By the way, in the above embodiment, the gauge insertion port 21 is formed on the upper side of the casing 1. However, the formation position of the gauge insertion port is not limited to that, and the bearing cases 3 and 4 and the rotor 7 are not limited thereto. , 8 may be formed at any position as long as it is a position corresponding to the gap between the two. Further, the number of gauge insertion ports is not limited to four.

[0019]

As described above, according to the fluid machine of the present invention, the clearance gauge insertion opening is formed in the peripheral wall portion of the casing so as to correspond to the clearance between the bearing case and the rotor, and the clearance gauge insertion opening is formed. Since the blocking member is detachably attached to the, the clearance dimension between the rotor and the bearing case can be measured and the suction port or discharge port can be measured by a simple operation of removing the blocking member and inserting the clearance gauge from the clearance gauge insertion opening. Since the diameter of the outlet is not changed, when connecting the suction pipe or the discharge pipe to the suction port or the discharge port, a connecting member for absorbing the dimensional difference between the two is not required, and the cost can be reduced. The effect is obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a roots blower device to which a fluid machine according to an embodiment of the present invention is applied.

FIG. 2 is a cross-sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

4 is a cross-sectional view taken along the line CC of FIG.

FIG. 5 is an exploded view of a main part of FIG.

FIG. 6 is a perspective view showing a rotor applied to the roots blower device of the above-described embodiment.

[Explanation of symbols]

 1 Casing 3,4 Bearing case 5 Suction port 6 Discharge port 7,8 Rotor 7b, 8b Rotating shaft 21 Gauge insertion port 22 Bolt

Claims (1)

(57) [Scope of utility model registration request] 1. A bearing case is attached to both end openings of a substantially cylindrical casing having a suction port and a discharge port formed in a peripheral wall portion, and the rotation shaft of a rotor housed in the casing is the bearing case. In a fluid machine in which the fluid is rotatably supported in a state of being inserted into the casing, and the fluid is sucked into the casing from the suction port by the rotation of the rotor and discharged from the discharge port. In addition, while forming a gap gauge insertion port corresponding to the gap between the bearing case and the rotor,
A fluid machine in which a closing member is detachably attached to the gap gauge insertion port.