KR100806196B1 - Performance test device of thrust ball bearing for hermetic compressor - Google Patents

Abstract

Efficiency test equipment for a thrust ball bearing of a hermetic compressor is provided to use qualified thrust ball bearings for the hermetic compressor to reduce problems of products. Efficiency test equipment for a thrust ball bearing of a hermetic compressor includes a drive part(10) and a control box(60). The drive part includes a vessel(19) having a rotary shaft inside, a stator(18) installed in the vessel to generate a magnetic field, a rotor having a thrust ball bearing, thrust washers disposed at both sides of the bearing, and a fixing cap couples the rotary shaft to the upper part of the rotor. The control box includes a sensor for measuring the RPM of the drive part and controls power of the drive part.

Description

Performance test equipment for thrust ball bearings for hermetic compressors {AN EFFICIENCY TESTING EQUIPMENT OF TRUST BALL BEARINGS FOR ENCAPSULATED TYPE COMPRESSOR}

1 is a schematic perspective view of an apparatus for testing performance of a thrust ball bearing for a hermetic compressor according to an embodiment of the present invention.

Figure 2 is an exploded perspective view of the drive unit of the performance test apparatus of the thrust ball bearing for the hermetic compressor of FIG.

3 is a cross-sectional view showing a coupling state of the rotating shaft and the rotor according to an embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

10: drive unit 11: rotating shaft

12: rotor 12a: jamming jaw

13, 15: thrust washer 14: thrust ball bearing

16: fixing cap 16a: fastening protrusion

17: Sensor bar 17a: Screw screw

18: Stator 18a: Core

19: container 20: power supply

40: sensor support 41: first detection sensor

42: second detection sensor 60: control box

61: device power switch 62: drive unit power switch

63: constant speed display plate 64: inertial speed display plate

70: support plate 80: separation part

The present invention relates to a performance testing apparatus for a hermetic compressor thrust ball bearing, and more particularly, it is possible to check the performance of a thrust ball bearing for hermetic compressor by measuring the idle speed of the rotor generated by inertia when the power of the drive unit is cut off. The present invention relates to a performance test apparatus for a thrust ball bearing for a hermetic compressor.

In general, a hermetic compressor that mechanically reduces the volume of gas to increase its pressure and is sealed inside is provided with a stator installed inside the container to generate a magnetic field with power applied from the outside, and a rotor and the rotor rotating in interaction with the stator. And a thrust ball bearing press-fitted to the rotor, a thrust ball bearing supporting the rotor, and a thrust washer interposed between the rotor and the thrust ball bearing.

Here, the thrust ball bearing performs a function of minimizing the eccentric friction and wear of the rotor and the support bearing in the lower end of the rotating shaft to drive the hermetic compressor.

Therefore, the performance of the thrust ball bearing plays a very important role in the function of the hermetic compressor.

However, in the conventional hermetic compressor as described above, since the thrust ball bearing is seated on the rotary shaft, the thrust ball bearing is manufactured by pressing the rotary shaft and the rotor. Will be produced. In other words, in the general process of manufacturing the hermetic compressor, since there is no device for separately measuring the performance of the thrust ball bearing before the thrust ball bearing is mounted on the rotating shaft, the performance of the hermetic compressor cannot be guaranteed. In particular, since the thrust ball bearing is a component that reduces the frictional resistance between the support bearing and the rotating shaft, it may be a major factor in the occurrence of a defect in the product because it is determined whether the thrust ball bearing is defective according to the driving time of the hermetic compressor.

The present invention was devised to solve the above problems, and an object of the present invention is to check the performance before mounting the thrust ball bearing for hermetic compressor to the rotating shaft of the hermetic compressor to be mounted on the product, greatly improving the reliability of the product. It is to provide a performance test apparatus for thrust ball bearings for hermetic compressors. In other words, by replacing only the thrust ball bearings in the hermetic compressor of the same structure and easily measuring the performance thereof, by using only the thrust ball bearings for the hermetic compressor that have proven performance in the hermetic compressor, the occurrence of defects of the product is greatly reduced. An object of the present invention is to provide a performance test apparatus for a thrust ball bearing for a hermetic compressor that can greatly improve reliability.

The structure of the present invention for achieving the above object is a stator mounted inside a container of a predetermined size, a rotor that is rotated through the top and bottom of the stator, a rotating shaft which is the central axis of the rotor, and the rotation axis of In the performance test apparatus for a thrust ball bearing of a hermetic compressor including a support bearing mounted at a lower end and a thrust ball bearing mounted between the support bearing and the rotor, a separation part is detachably disposed between the rotation shaft and the rotor. Is formed, the fixed cap for fixing the rotor to the rotary shaft to the upper end of the rotating shaft, a plate-shaped sensor bar mounted on the upper end of the fixed cap, a detection sensor for sensing the sensor bar mounted on the fixed cap to rotate And, by receiving the signal of the detection sensor to measure the number of revolutions of the rotor by the ball trust That is configured to include a control box for measuring the lubrication of the ring features.

Here, the fixing means is a plurality of locking projections formed on the upper end of the rotor, it is preferable that the plurality of fastening projections protruding at a certain height on the side of the fixing cap to be engaged with the locking projections.

In this case, the detection sensor includes a first detection sensor for detecting the rotation of the rotor at constant speed, and a second detection sensor for detecting that the rotor is rotated without power after the constant speed movement, the control box is the rotor It is preferable to include a power supply for supplying power to the constant speed movement, or to cut off the power when the rotor is a constant speed movement.

Here, the control box is a constant speed display panel for receiving the signal of the first detection sensor to display the number of revolutions of the rotor, and the rotation of the rotor is power-free inertial rotation receiving the signal of the second detection sensor It is preferable to further comprise an inertial rotation speed display plate for displaying the number.

Hereinafter, with reference to the accompanying drawings will be described in detail the performance test apparatus of the thrust ball bearing for hermetic compressor.

1 is a schematic perspective view of a performance test apparatus for a hermetic compressor thrust ball bearing according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a driving unit of the performance test apparatus for a thrust ball bearing for a hermetic compressor shown in FIG. Is a cross-sectional view showing a coupling state of the rotating shaft and the rotor according to an embodiment of the present invention.

As shown in FIGS. 1 to 3, the performance test apparatus for a hermetic compressor thrust ball bearing according to a preferred embodiment of the present invention is made of constant speed rotation and idling in the container 19 by external power control. A drive unit 10 including a thrust ball bearing 14 therein, and a sensor for measuring the rotational speed of the drive unit 10 are provided, and a control box 60 for controlling the power of the drive unit 10. It is composed of

The drive unit 10 is provided with a rotating shaft 11 therein, the container 19 having a predetermined size provided with a power supply unit 20 on the outer surface, and is installed inside the container 19 and the power supply unit ( The stator 18 is operated by the power applied through the 20 and generates a magnetic field, and is provided inside the stator 18 so that the thrust ball bearing 14 is rotated relative to the bottom by the operation of the stator 18. A thrust interposed between the rotor 12 and the thrust ball bearing 14 having an inner diameter larger than an outer diameter of the rotary shaft 11 so that a spaced portion 80 is formed when the rotary shaft 11 is inserted into the rotary shaft 11. Is coupled to the upper portion of the washer (13, 15) and the rotor 12 by the coupling means to rotate the same as the rotor (12), but the rotation axis through the sensor bar (17) provided at the top ( 11) is provided with a fixed cap 16 for rotating the rotor 12 and the rotating shaft 11 by coupling.
That is, the fixing cap 16 rotates the rotor 12 and the rotating shaft 11 in the same manner through the sensor bar 17 while being coupled to the upper portion of the rotor 12 by a coupling means. will be.

Here, the coupling means is a plurality of fastening protrusions (16a) protruding to a certain height on the outer surface of the fixed cap 16 and the fastening projections (16a) to the upper end of the rotor 12 to be engaged with each other and fastened. It is preferable that there are a plurality of locking jaws 12a.

At this time, the control box 60 is connected to the sensor support 40 so as to be spaced apart from the sensor bar 17 of the fixed cap 16, the sensor for detecting the rotational speed of the sensor bar 17, and A constant speed display panel 63 and an inertial speed display panel 64 representing the performance of the thrust ball bearing 14 by the signal sensed by the sensor, respectively.

Here, the sensor is provided with a first detection sensor 41 for measuring the number of revolutions of the rotor 12 when the power is applied by the power supply unit 20 and one side of the first detection sensor 41 spaced apart. And a second detection sensor 42 measuring the idle speed of the rotor 12 when the power is cut off by the power supply unit 20.

That is, when the power is applied by the signal from the control box 60, a current flows in the core 18a of the stator 18 inside the vessel 19 so that the rotor 12 inside the stator 18 The support ball of the thrust ball bearing 14 is rotated at constant speed, which rotates the sensor bar 17 organically coupled with the rotor 12 at about 3600 rpm, which is the first rotation. The control box 60 is detected by the detection sensor 41, and when the power is cut off from the control box 60, the sensor bar 17 stops the constant speed rotation and makes idle by inertia, thereby detecting the second. It is preferably configured to be detected in the control box 60 through the sensor 42.

Looking at the operation and effect of the present invention configured as described above, the power is applied to the control box 60 by the operation of the device power switch 61 of the control box 60 and the drive unit power switch 62 of the control box 60 In operation, power is applied to the stator 18 inside the container 19 of the drive unit 10 connected to the control box 60 by electric wires to generate a magnetic field, and the rotor 12 spaced apart from the stator 18 is installed. ) Rotates at a constant speed about the rotation shaft 11 by the interaction with the stator 18, and when the power to the drive unit 10 is cut off by the drive unit power switch 62 of the control box 60 The rotor 12 is idling by inertia.

The constant velocity motion of the rotor 12 is a constant velocity motion of the fixed cap 16 fixed to the upper end of the rotor 12, the constant speed rotation of the rotor 12 is the fixed cap 16 It is provided at the upper portion of the first through the sensor bar 17 is rotated by the first detection sensor 41 spaced apart from the sensor bar 17 is transmitted to the control box 60.

The idle of the rotor 12 is started by the operation of the drive unit power switch 62 in the control box 60, the stator 18 is no longer interacting with the rotor 12 In this case, the rotor 12 is rotated by the inertia generated by the constant velocity motion, and the sensor bar 17 also starts the same rotation. The idle speed of 12 is detected by the second detection sensor 42 spaced apart from the sensor bar 17 to transmit a detection signal to the control box 60.

At this time, the idle speed of the rotor 12 is different depending on the thrust ball bearing supporting the rotor 12, the better the performance of the thrust ball bearing, the more idle speed of the rotor 12 Check through the control box (60).

On the other hand, since the rotor 12 has an inner diameter larger than the outer diameter of the rotary shaft 11 so that the spaced portion 80 is formed when the rotor 12 is engaged with the rotary shaft 11, the rotor 12 is not integral with the rotary shaft 11, Separation from the rotating shaft 11 is possible, and for this reason, it is easy to replace the thrust ball bearing located below the rotor 12. The separation unit 80 in the state in which the rotor 12 and the rotating shaft 11 are coupled thereto is fitted to the rotating shaft 11 as shown in the cross-sectional view of FIG. 3 to have a predetermined distance from the rotating shaft 11. It is retained, supported by the thrust ball bearing and rotatably fixed, and the inside is not in contact with the rotating shaft (11).

Here, in order to separate or replace the thrust ball bearing 14 from the rotating shaft 11 to measure the performance of another thrust ball bearing, the screw 17a and the sensor bar after the first stator 18 are removed. 17) and the fixed cap 16 and the rotor 12 in sequence along the axis of the rotary shaft 11, so that the thrust ball bearing between the two thrust washers 13, 15 can be easily removed or replaced. do.

That is, the thrust ball bearing is naturally separated or replaced in the drive unit 10 by removing the screw 17a on the upper part of the rotating shaft 11 after the stator 18 is separated.

Therefore, the thrust ball bearing whose performance is suspected is mounted on the drive unit 10 under the same conditions, and the performance is controlled through the power supply control in the control box 60. It can be easily measured through, and by using only the thrust ball bearing proven in performance through the pressurized fixed to the hermetic compressor, it is possible to significantly reduce the occurrence of defects of the hermetic compressor.

According to the present invention configured as described above, the performance of the thrust ball bearings can be easily measured through the control box only by replacing the thrust ball bearings in the driving unit under the same conditions, and only the thrust ball bearings whose performance has been proved through the measurement are press-fitted into the hermetic compressor. By using it, it is possible not only to greatly reduce the occurrence of defects of the product, but also to reduce the cost, thereby improving the economics, and to produce a reliable product.

Claims (4)

A stator mounted inside a container of a predetermined size, a rotor which is rotated through the stator and rotated up and down, a rotation shaft serving as a center axis of the rotor, a support bearing mounted at a lower end of the rotation shaft, and the support bearing; In the thrust ball bearing performance test apparatus of a hermetic compressor including a thrust ball bearing mounted between the rotors, Between the rotating shaft 11 and the rotor 12, the separation portion 80 is formed to be detachable, A fixing cap 16 for fixing the rotor 12 to the rotating shaft 11 by a fixing means at an upper end of the rotating shaft 11, and a plate-shaped sensor bar 17 mounted to an upper end of the fixing cap 16. And, a sensor mounted on the fixed cap 16 to detect the rotating sensor bar 17, and receives the signal of the sensor to measure the number of revolutions of the rotor 12 by measuring the rotation of the ball bearing Performance test apparatus of the sealed ball thrust ball bearing for a compressor characterized in that it comprises a control box 60 for measuring the lubrication performance. The method of claim 1, The fixing means includes a plurality of locking jaws 12a formed at the upper end of the rotor 12 and a plurality of fastening protrusions protruding to a side of the fixing cap 16 so as to be engaged with the locking jaws 12a. Performance test apparatus for the thrust ball bearing for a hermetic compressor, characterized in that the projection (16a). The method according to claim 1 or 2, The detection sensor may include a first detection sensor 41 that detects the rotor 12 moving at a constant speed, and a second detection sensor that detects that the rotor 12 is rotated without power after the constant speed motion ( 42), The control box 60 is configured to include a power supply unit 20 for supplying power to the rotor 12 is a constant speed movement, or cut off the power when the rotor 12 is a constant speed movement. Test equipment structure for thrust ball bearing for hermetic compressor. The method of claim 3, The control box 60 receives the signal of the first sensor 41, the constant speed display panel 63 for displaying the number of revolutions of the rotor 12, and the second sensor 42 Performance tester for a sealed compressor thrust ball bearing, characterized in that the rotor 12 further comprises an inertia speed display panel (64) for displaying the rotational speed of the power-free inertial rotation receiving the signal of.

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