JP2657184B2 - Liquid type auto balancer - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid automatic balancer for automatically correcting imbalance of a rotating body such as a grindstone using a liquid.

[Prior Art] Japanese Patent Application Laid-Open No. 58-160058 discloses that liquid is selectively injected into a plurality of pockets arranged around the axis of a rotating body by a liquid ejecting nozzle connected to a pump, and is rotated. A liquid autobalancer adapted to correct the body imbalance is disclosed.

[Problems to be Solved by the Invention] However, in this conventional apparatus, there is a problem that the liquid, chips, and the like remaining in the pockets adversely affect the balancing accuracy. Further, conventionally, since the liquid is supplied to the liquid ejecting nozzle by the pump, there is a disadvantage that noise generated by rotation of the pump hinders accurate measurement of vibration of the rotating body.

The present invention has been made in view of the above problems,
It is a primary object of the present invention to provide a liquid auto balancer capable of performing a high-precision balancing operation by removing a residue in a pocket.

Another object of the present invention is to provide a liquid automatic balancer that can supply liquid and air to respective ejection nozzles with a simple configuration that does not require a pump.

[Means for Solving the Problems] In order to achieve the above object, a liquid auto balancer according to the present invention injects a liquid into a plurality of pockets arranged around an axis of a rotating body and a pocket of a specific phase. A liquid jet nozzle to correct the imbalance of the rotating body
An air jet nozzle for jetting air toward the pocket and discharging the liquid in the pocket to the outside.

Preferably, the liquid injection nozzle and the air injection nozzle are configured by a common gas-liquid injection nozzle.

In addition, in addition to the above-described configuration, the liquid auto balancer according to the present invention is configured such that the liquid contained therein is pressurized by pressurized air and supplied to the liquid ejecting nozzle, and the pressurized air is supplied to the air ejecting nozzle. Gas-liquid supply tank.

[Operation] According to the above solution, the liquid or chips remaining in the pocket is discharged to the outside by the pressurized air from the air injection nozzle, so that the balancing operation is performed without any residue in the pocket. Can be performed accurately. Also, since the liquid in the gas-liquid supply tank is supplied to the liquid ejecting nozzle by the pressure of the pressurized air, there is no need to use a pump,
Moreover, there is no possibility that noise generated due to the rotation of the pump will hinder the vibration measurement.

Embodiment An embodiment in which the present invention is embodied in a liquid type automatic balancer for a grinding wheel will be described below with reference to the drawings.

As shown in FIG. 1, the liquid automatic balancer of this embodiment includes a balancing ring 2, a gas-liquid injection nozzle 3, and a gas-liquid supply tank 4. The balancing ring 2 is attached via a screw 8 to a holder 7 fixed on the main shaft 6 of the grinding machine 5, and a grindstone 9 as a rotating body is sandwiched and fixed between the ring 2 and the older 7. ing.

A plurality of (in the illustrated example, 24) pockets 10 are arranged annularly at equal intervals on the front surface of the balancing ring 2, and a cover ring 11 is screwed to cover all the pockets 10.
It is attached by. The inside opening of each pocket 10 that is not covered by the lid ring 11 is an inlet 13. Further, as shown in FIG. 2, an appropriate number of balance pieces 15 for performing preliminary manual balancing are selectively provided in a plurality of screw holes 14 arranged annularly at a position inside the inlet 13. It can be screwed on.

The gas-liquid injection nozzle 3 of this embodiment has a configuration in which the liquid injection nozzle and the air injection nozzle are commonly used, and as shown in FIG. It is arranged close to the front surface of the balancing ring 2 via an appropriate support member such as a grinding wheel cover which is not used.
As the injection nozzle 3, an electromagnetic fuel injector for a gasoline engine having a built-in electromagnetic coil and a needle valve opened and closed by the coil can be used. In addition, the ultrasonic vibration by the piezoelectric element is enlarged by a horn. An ultrasonic injector of the type that opens and closes the injection valve can also be used. Note that the injection nozzle 3 and the balancing ring 2 may be arranged on the back surface side of the grindstone 9.

The supply pipe 16 of the injection nozzle 3 is connected to a liquid pipe 18 and an air pipe 19 extending from the gas-liquid supply tank 4 via an electromagnetic switching valve 17. The gas-liquid supply tank 4 has a closed structure, in which liquid L such as clean water or grinding fluid is stored, and is pressurized at a predetermined pressure by pressurized air A from an air source (not shown). I can do it. When the liquid passage of the switching valve 17 is opened, the gas-liquid supply tank 4
Is supplied to the gas-liquid injection nozzle 3 via the liquid pipe 18 and the supply pipe 16, and when the air passage of the switching valve 17 is opened, the pressurized air A in the gas-liquid supply tank 4 The gas is supplied to the gas-liquid injection nozzle 3 through the pipe 19 and the supply pipe 16.

Therefore, when the balancing operation is started, when the air passage of the switching valve 17 and the gas-liquid injection nozzle 3 are opened by a command from a control device (not shown) in the rotating state of the grindstone 9, the injection is performed from the nozzle 3. Pressurized air is injected into all the pockets 10 through the injection port 13, and the pressure causes liquid, chips, and the like remaining in the pockets 10 to be discharged to the outside. Therefore, the balancing operation can be performed accurately without any residue in the pocket. Note that the whetstone 9
When the operation is stopped, it is necessary to rotate the grindstone 9 by hand to make all the pockets 10 face the gas-liquid injection nozzle 3.

On the other hand, during the balancing operation, when the liquid passage of the switching valve 17 and the gas-liquid injection nozzle 3 are opened by a command from the control device, the liquid L injected from the nozzle 3 flows through the injection port 13 of the balancing ring 2. Through a specific pocket
Injected into the pocket 10 and held in the pocket 10 by the centrifugal force accompanying the rotation of the grindstone 9. As a result, a predetermined amount of mass acts on a specific phase of the grindstone 9, whereby the imbalance of the grindstone 9 is automatically corrected.

By the way, according to the structure of the gas-liquid supply tank 4 described above, it is not necessary to provide a pump, so that not only the configuration of the supply unit is simplified, but also noise generated with the rotation of the pump is generated by the vibration detector 20 ( (See FIG. 1). Therefore, it is possible to accurately measure the vibration inherent in the rotating body such as the grindstone 9 and perform a highly accurate balancing operation based on the vibration. Also,
In this embodiment, since the liquid and air can be ejected from the single gas-liquid ejection nozzle 3, the configuration of the auto balancer is simplified.

FIG. 3 shows another embodiment of the present invention, in which a liquid jet nozzle 22 and an air jet nozzle 23 are pocketed.
The nozzles 22 and 23 are arranged on the liquid pipe 18 and the air pipe 19 at different positions in the rotation range of 10 respectively.
Opening / closing valves 24 and 25 are provided. Also according to this configuration, the residue in the pocket 10 can be reliably removed as in the above-described embodiment.

[Effects of the Invention] As described in detail above, according to the present invention, a highly accurate balancing operation can be performed by removing the residue in the pocket, and the liquid can be removed by a simple configuration that does not require a pump. This provides an excellent effect that air and air can be supplied to the respective injection nozzles.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view of a liquid auto balancer showing one embodiment of the present invention, FIG. 2 is a partial front view thereof, and FIG. 3 is a liquid auto balancer showing another example of the present invention. FIG. Gas-liquid injection nozzle ... 3, gas-liquid supply tank ... 4, grindstone as rotating body ... 9, pocket ... 10, liquid injection nozzle ... 22, air injection nozzle ... 23, liquid ... L, air ......
A.

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeshi Itatsu 1333, Atobe, Mugegawa-cho, Bugi-gun, Gifu Prefecture Inside Nagase Iron Works, Ltd. (56) References JP-A-58-160058 (JP, A) JP-A-54 −54389 (JP, A)

Claims (3)

(57) [Claims] 1. A plurality of pockets (10) arranged around the axis of a rotating body (9), and a liquid (L) is injected into a pocket (10) having a specific phase to balance the rotating body (9). Nozzles (3) and (22) for correcting the pressure, and air injection nozzles for injecting air (A) toward the pocket (10) to discharge the liquid (L) in the pocket (10) to the outside (3) A liquid autobalancer comprising (23) and (23). 2. A liquid automatic balancer according to claim 1, wherein said liquid jet nozzle and said air jet nozzle are constituted by a common gas-liquid jet nozzle. 3. A plurality of pockets (10) arranged around an axis of the rotating body (9), and a liquid (L) is injected into a pocket (10) having a specific phase to balance the rotating body (9). Nozzles (3) and (22) for correcting the pressure, and air injection nozzles for injecting air (A) toward the pocket (10) to discharge the liquid (L) in the pocket (10) to the outside (3) (23) and the liquid (L) contained therein is pressurized by pressurized air and supplied to the liquid jet nozzles (3) and (22), and the pressurized air is supplied to the air jet nozzles (3) and (22). And a gas-liquid supply tank (4) adapted to supply the liquid to the auto-balancer.