JPS58101295A - Pumping apparatus - Google Patents

Abstract

PURPOSE:To prevent the invasion of water into the bearing in such a way that the one end of a rotary ring including a disc portion is abut to the end surface of a bearing, the flat portion of a stationary disc is pinched between said bearing and a preliminarily pressed member and the pump casing is integrated with a motor engineering plastic. CONSTITUTION:A fixed plate 82 is provided with a cylindrical portion 82a and a rotary ring 81 is provided with a disc portion 81a which is larger than the diameter of the cylindrical portion 82a. The one end of said rotary ring 81 is abut to the end surface of a bearing. Said fixed plate 82 is constituted with a flat portion 82b and said cylindrical portion 82a and said flat portion 82b is pinched between said bearing 35 and a preliminarily pressed member 83 or between said member 83 and the bottom surface of BB seat 34. Thus, even in the case that a water leakage occurs due to the damage of a sealing device and so on when a pump box-like body 1 is integrated with a motor engineering plastic 28, invasion of water into said bearing 35 can be prevented by said disc portion 81a of said rotary ring 81, said cylindrical portion 82a of said fixed plate 82 and so on.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pump device, and in particular, when the frame is integrated with the engineering plastic of the motor and the pump frame, water leakage from a shaft-piercing device can be prevented from entering the motor hook. Regarding a structure suitable for

Conventionally, in pump devices that directly connect the pump and electric motor, water leakage from the pump part enters the motor bearing part and damages the bearing. A barrier board was installed to prevent water from entering.

The present invention is a book that suppresses water intrusion into a bearing portion without reducing workability even when a pump frame and a motor encircle are integrated.

The details will be explained below based on the drawings.

First, the configuration of the electric motor section will be explained in detail.

The stator fitting lip 1e of the frame body 1 is fitted with the stator 29 with a zero gap, and the core presser 33 prevents the stator 2 from being pulled out, and the core presser 33 is connected to a plurality of poles 32.
Thus, the stator 29 is fixed to the boss portion 1g of the frame body 1.

The bolt 32 is screwed into the hole 1w of the frame 1 while tightening.

Fitting length l of stator fitting lip 1e and stator 2
The chest connection of the fitting part length L of No. 9 is L>1, and the workability of the armpit of L-1 is low.

The rotating shaft 20 is a bearing 35 of the frame 1 made of synthetic resin, in which the rotating shaft 20 is fixed by shrink fitting or the like, and bearings 35 and 35' positioned on the washers 36 and 36' are fitted.
A metal 88 tab 34 is fitted into the fitting hole 1d.

The outer ring IK of the bearing 35 is brought into contact with the flat part 82b of the fixed plate 82, which is made up of a cylindrical part 82a and a flat part 82b.

A rotary ring 81 having a cylindrical portion 81b having a smaller diameter than the cylindrical portion 82 is in contact with the inner ring end of the bearing 35, and the other end of the rotary ring 81 has a disk portion 811 having a diameter larger than that of the cylindrical portion 82. .

A preload member 83 is interposed between the fixing plate 82 and the BBBa2O bottom surface 34 & to prevent the rotating shaft 20 from shaking.

Incidentally, FIG. 11 shows an alternative version of the present invention using the same part names only with ``'' added to the symbols.

A bearing 35 is fitted to the BB roller 34, and the engineering plastic 2B is fixed to a fan guide 311 using the outer periphery of the stator 29 as a guide.
The engineering plastic 2 is fitted with a plurality of bolts (not shown).
8 is fixed to the frame 1 to constitute an electric motor section.

A bolt (not shown) is screwed into the hole 1f of the frame 1 by tapping it.

Next, the structure of the frame 1 of the pump section will be described in detail.

In addition to the stator fitting part 101 described above, the frame l made of synthetic resin has a water leakage discharge part 10 between the BB and the fitting hole 1d.
A stuffing box 1m is provided with a shaft sealing device 27 via a stuffing box 1m, an impeller chamber 1b is formed in front of the stuffing box 1m, and a steam/water separation chamber IC is formed in the upper part of the stuffing box la9.

A vortex M1t is formed in the impeller chamber 1b so that the impeller 22 can smoothly pump liquid. Impeller Jib of frame 1
A nut 26 is integrally formed at the open end of the cover 23 and the backing 24 to be fixed with a bolt 25.

The starting end of the vortex chamber 11 communicates with the valve chamber lqK through a suction waterway 1n. A valve 6 that is sealed with an elastic body 5 is incorporated in the valve chamber 1q to prevent backflow of pumped water.

Suction side waterway 1r via the above-mentioned check valve section 103.

A suction port IS is formed in the frame 1, and a suction flange 13 is fixed to the suction port II via a backing 12 with bolts (not shown) to connect a suction pipe.

The terminal end of the vortex chamber 11 is connected to the air/water separation chamber I by the discharge waterway 1p.
Connects to C.

The steam/water separation chamber 1c is formed above the water leakage discharge part 102 and the stuffing box 1m, and its bottom part IV is constituted by the cylindrical wall of the stuffing box, the upper wall of the water leakage discharge part, etc.
It is located lower than the discharge waterway IP. In addition, the air-water separation chamber I
In configuration C, the lid 2 is fixed to the upper end face 1m of the frame 1 via a backing 11 by ultrasonic welding.

The cap 4, which serves both as a guide for the valve 6 of the check valve section 103 and as a priming port for the pump, is screwed onto the frame 1 through a backing 15.7 and 2.

The discharge side waterway 1t, which opens at the upper part of the steam/water separation chamber IC, is a communication path that leads the discharged liquid from the steam/water separation chamber IC to the pressure vessel 3.

Similarly, the electric motor component of the frame l has a boss portion 1g for screwing the bolt 32, etc., and holes 1f, 1w, and the length of the stator fitting rib 1 is also longer.
As shown in Fig. 6, a frame 1 is installed to prevent sinking on the outer surface of the synthetic resin molded product, to provide a drainage hole for water entering the electric motor, and to save resources.
A hole 1k is formed from the lower surface of.

In addition, since the bottom of the stator fitting part 101 also serves as the wall of the steam/water separation chamber 1e, if dew condenses on the bottom of the stator fitting part 101 due to atmospheric humidity, water temperature, and air temperature difference, the bearing 35 Bearing 3 that prevents the dew from entering
5. In order to provide the protrusion 1h of the external part and suppress the temperature rise of the electric motor, the ventilation hole 1j is provided in the stator fitting part 101.
It is provided at the bottom between the suction side waterway 1r and the discharge side waterway 1t.

By configuring the frame 1 as described above, it becomes possible to remove the mold from a synthetic resin mold, as shown in FIGS. 3 to 9.

Next, the structure of the first part of the bong will be described in detail.

A shaft sealing device 27 for controlling water between the frame body 1 and the rotating shaft 20 is fitted in the stuffing box la on the rotating shaft 20, and an impeller 22 is also fitted on the rotating shaft 201 via a key 21. has been done. The front opening of the impeller chamber 1b is closed by a cover 23 via a backing 24, and the bolt 2
It is fixed by 5.

An automatic air replenishment device 7 that automatically supplies air to the pressure vessel 3 is installed in the hole 1u of the discharge side waterway 1t of the frame body 1 by bolts 14.
installed in a watertight manner.

In addition, a temperature-sensitive relay 9 that protects the pump when the pump temperature rises abnormally is attached by a stay 10, and an automatic air supply device 7 is installed.
communicates with the vortex chamber on the cover 23 side near the suction waterway in through a communication pipe 8 in order to sense the pressure on the suction side.

Next, the operation of the pump will be explained.

As the motor rotating shaft 20 rotates, the impeller 22 pumps up water from the suction side water %lr via the check valve section 103 and the suction waterway 1n, and the liquid discharged from the discharge waterway 1p is transferred to the steam-water separation chamber IC. After that, water is stored in the pressure vessel 3 from the discharge side waterway 1t, and when the pressure in the pressure vessel 34 rises to the OFF pressure of a pressure switch (not shown), it is turned off by the pressure switch.

When water is released from the faucet, the stored water is released, the pressure is reduced, and when the pressure drops to the ON pressure of the pressure switch, the pressure switch is turned ON, the electric motor rotates again, the pump starts pumping water, and at the same time Automatic air supply device 7 for suction side pressure
senses this, takes in air from the atmosphere, and supplies the air necessary for water storage into the pressure tank 3.

The pump device operates by repeating the above steps.

By configuring as above, when assembling the electric motor,
By the end of the bearing 35 and the rotating shaft 20, a preload member 83. After fitting the fixed plate 82, the rotary ring 81 is fitted until it touches the inner ring end of the bearing 35, and the bearing 35 is fitted to the BB seat 34.

In addition, this function is such that even if water leaks due to damage to the pump sealing device 27, the disk portion 8 of the rotating ring 81
11 and the cylindrical portion 82a of the fixed plate 82 prevent water from entering the bearing 35 portion.

Furthermore, by bringing the end surface of the rotating ring 81 into contact with the inner ring end of the bearing 35, the rotating ring 81 will not be assembled in contact with the frame It or the fixed plate 82 during assembly, and problems that may occur in the case of contact are prevented. This eliminates concerns about sewing, and has great practical benefits.

[Brief explanation of drawings]

Fig. 1 is a front view of the pump device of the present invention, Fig. 2 is a cross-sectional view of Fig. 1 - Fig. 3 is a front view of the frame of the present invention, and Fig. 4 is a left side view of the frame of the present invention , FIG. 5 is a bottom view of the frame of the present invention,
In Figure 6, the upper part is a rear view of the frame, and the lower part is V-■ in Figure 5.
7 is a sectional view taken along the line 1-1 in FIG. 3, FIG. 8 is a sectional view taken along FIG. Enlarged view of part, Figure 11 shows other actual parts.IFIJ
It is an enlarged view of part P. 27...Shaft sealing device, 34...BB ther, 34a...
Bottom part, 35... Bearing, 81... Rotating ring% 81
&...Disc part, 82...Fixing plate, 82a...Cylindrical part, 82b...Plane part. Early / National 7th Figure 7s 1r Early / θ Day stb % // Figure

Claims (1)

[Claims] 1. all! Where the end face of the MM and the shaft sealing device of the pump are close to each other, one end of the rotating ring having a disk portion having a diameter larger than the diameter of the cylindrical portion of the fixed plate having the cylindrical portion is brought into contact with the end surface of the bearing. pump equipment. 2. In claim 1, the fixed plate is constituted by a flat part and a cylindrical part, and the flat part of the fixed plate is sandwiched between the bearing and the preload material or between the preload material and the bottom part of the HB. A pump device characterized by: