KR101667711B1 - Compressor - Google Patents

Abstract

The present invention relates to a oil separator and a compressor having the oil separator, and in accordance with an aspect of the present invention, A compression mechanism disposed at a lower portion of the casing and including a crankshaft; A stator positioned above the compression mechanism; A rotor disposed inside the stator and fixed to the crankshaft; And an oil separator fixed to an upper end of the crankshaft, wherein the oil separator comprises: a disc portion covering at least a portion of an upper portion of the rotor; And a support portion including a fastening portion to be fastened to an upper end portion of the crankshaft and to which the disk portion is fixed.

Compressor, oil separator, crankshaft, sleeve.

Description

COMPRESSOR

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a oil separator and a compressor having the oil separator, and more particularly, to a compressor having an oil separator for minimizing lubricating oil mixed with refrigerant or discharged directly through a discharge port.

2. Description of the Related Art [0002] Generally, a rotary compressor applied to an air conditioner or the like has a structure in which a rolling piston of a compression mechanism is eccentrically coupled to a crankshaft coupled to a transmission mechanism, and the rolling piston swirls in a circular cylinder, And discharging it.

Specifically, a compression mechanism is disposed at a lower portion of the casing constituting the outer shape of the compressor, and a transmission mechanism portion for rotating the crankshaft is located above the casing. The transmission mechanism portion includes a stator fixed to the inner wall of the casing, And a rotor fixedly installed on the crankshaft.

In the rotary compressor having such a structure, oil for smooth rotation of the compression mechanism is stored in the lower portion of the casing, and the oil is transferred to the upper portion by the oil feeder located under the crank shaft, The mechanical portion is lubricated, and a part of the oil rises to the rotor side and is scattered inside the casing.

An oil separator is installed on the crankshaft to prevent the oil thus scattered from being mixed with the refrigerant through the discharge port and being discharged to the outside. The oil separator is generally manufactured by press-working a metal plate, and a part of the oil separator is joined to the crankshaft or another structure inside the casing, and the oil separator is disposed in a scattering path of the oil, To its surface. The oil attached to the oil separator drops down to return to the lower portion of the casing.

However, since the conventional oil separator as described above has a structure to be coupled to the inside of the casing of the compressor through a separate bolt or the like, the installation process is troublesome. In addition, when the oil separator is installed on the crankshaft, There is a problem that vibration and noise are generated and mounting is difficult.

In addition, in order to manufacture oil separating plates of different sizes, there is a problem that the application range is limited because there is a problem that a new press die is required.

SUMMARY OF THE INVENTION The present invention has been made to overcome the disadvantages of the prior art as described above, and it is a technical object of the present invention to provide a compressor having an oil separator that is easy to install.

Another object of the present invention is to provide a compressor having an oil separation device that is easy to change in size.

According to an aspect of the present invention, A compression mechanism disposed at a lower portion of the casing and including a crankshaft; A stator positioned above the compression mechanism; A rotor disposed inside the stator and fixed to the crankshaft; And an oil separator fixed to an upper end of the crankshaft, wherein the oil separator comprises: a disc portion covering at least a portion of an upper portion of the rotor; And a support portion including a fastening portion to be fastened to an upper end portion of the crankshaft and to which the disk portion is fixed.

In the above aspect of the present invention, the oil separator is constructed by dividing the oil separator into a disc portion and a support portion. However, the oil separator can be applied to various types of compressors by replacing only the disc portion, , It is possible to efficiently utilize the space for transportation and storage of the product. In addition, since the fastening portion is formed on the support portion, a separate fastening means is not required and the mounting operation can be simplified.

The crank shaft may have a fastening hole formed at an upper end of the crankshaft to which the fastening portion is coupled, and the fastening portion of the fastening portion may be inserted and fixed in the fastening hole. Since the fastening hole is formed in the process of manufacturing the crankshaft, it can be formed to coincide with the center of rotation of the crankshaft. By inserting the fastening portion into the fastening hole, the center of the crankshaft can be aligned with the center of the oil separating device. . At this time, the fastening hole and the fastening portion can be screwed together.

The supporting portion may include a sleeve interposed between the disk and the upper end of the crankshaft; And a fixing bolt inserted into the sleeve and screwed to the inside of the coupling hole, wherein the circular plate has a through hole through which the fixing bolt is inserted so as to be fixed between the sleeve and the fixing bolt can do. That is, the disc portion can be pressed by the sleeve and the fixing bolt and fixed by the pressure thereby.

In this case, the fixing bolt may have a flange-shaped contact portion contacting the surface of the disk portion, and a washer may be included in place of the contact portion.

In addition, a flange may be formed at the upper end of the sleeve so as to be in contact with the surface of the disk.

In addition, at least one of the contact portion and the flange may be provided with a latching portion for preventing the disc from rotating with respect to the sleeve, and the latching portion may have the form of a protrusion protruding from the surface of the flange.

Meanwhile, the disc portion may be made of a material different from that of the support portion. Particularly, the support portion is made of a metal material to increase the joint strength, and the disk portion is made of a synthetic resin material capable of reducing the rotation moment, thereby reducing vibration due to eccentricity and reducing the rotation moment of the crankshaft, Can be improved.

According to another aspect of the present invention, A sleeve in contact with a surface of the disc portion; And a fixing bolt inserted into the sleeve through the disk portion and having a contact portion in contact with the disk portion. When the fixing bolt is fastened to the inside of the compressor, between the contact portions of the sleeve and the fixing bolt, There is provided an oil separator for a compressor to which an additionally fixed compressor is attached.

The oil separator can be mounted on any component within the compressor as long as it can contact the oil that is scattered in addition to the crankshaft.

Here, the contact portion of the fixing bolt may have a flange shape, and a flange contacting the disc portion may be formed at the upper end of the sleeve.

In addition, the end of the fixing bolt may be screwed to the end of the crankshaft of the compressor.

According to aspects of the present invention having the above-described components, the oil separating device may be formed in a separate form rather than being integrated, thereby facilitating storage and transportation. In addition, And it is possible to contribute to the improvement of the productivity of the product.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a compressor having a oil separator according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view illustrating an oil separator according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing the embodiment, FIG. 3 is a view showing a state where the embodiment is shown on a crankshaft of a compressor Sectional view.

Referring to FIGS. 1 to 3, the embodiment 100 has a T-shape as a whole, and a disk-shaped disk 110 is disposed at an upper portion of the disk 100. The disk 100 is fixed to the sleeve 120 And has a structure in which the bolt 130 is fixed.

Specifically, the disk portion 110 is disposed to cover an upper portion of a rotor, which will be described later, and a through hole 112 is formed at a central portion thereof. The sleeve 120 is disposed at a lower portion of the disk unit and the sleeve 120 has a cylindrical shape. A flange 122 is formed at an upper portion of the sleeve 120 to be in contact with a bottom surface of the disk unit 110. The flange 122 can increase the contact area with the circular plate 110 so that the circular plate 110 can be stably supported at the upper portion of the sleeve 120 and the frictional force with the circular plate 110 is increased It also serves to prevent the disc 110 from rotating relative to the sleeve 120 in a state where the disc 110 is mounted on the compressor.

The fixing bolt 130 includes a head portion 132 and a threaded portion 134. A flange-shaped contact portion 136 is formed between the head portion 132 and the threaded portion 134. [ The threaded portion 134 has a diameter equal to or smaller than the inner diameter of the through hole 112 so as to be inserted into the through hole 112 of the disc portion 110. The threaded portion 134 has a structure in which a thread is formed in only a part of the end portion of the threaded portion 134. The diameter of the portion where the threaded portion is not formed substantially coincides with the inner diameter of the sleeve 120, And the inner wall of the sleeve can be brought into close contact with each other.

In addition, the length of the portion where the thread is not formed is shorter than the length of the sleeve 120. When the fixing bolt 130 is completely fastened, the sleeve 120 is compressed in the axial direction to some extent, thereby making it possible to fix the disk unit 110 more strongly.

The contact portion 136 has a larger diameter than the through hole 112 of the circular plate portion 110 and is configured to press both sides of the circular plate portion 110 together with the flange 122. At this time, an example in which a washer is added to the bottom of the contact portion 136 may be considered, and an example in which the contact portion is omitted and only a washer is included may be considered.

Referring to FIG. 3, a rotary compressor equipped with the embodiment 100 is shown. The rotary compressor 10 includes a casing 12 constituting an external shape of the device. A discharge pipe 12a through which compressed gas, for example, refrigerant is discharged, is disposed above the casing 12, And a suction pipe 12b for sucking the refrigerant to be compressed into the casing is disposed on the lower side surface.

The refrigerant sucked through the suction pipe 12b is introduced into the upper and lower cylinders 16 and 18 arranged on the upper and lower portions of the intermediate plate 14 through the branch passage 14a formed in the intermediate plate 14, And is compressed in the upper cylinder 16 and the lower cylinder 18. Concretely, the upper cylinder 16 and the lower cylinder 18 are compressed in the space inside each cylinder by the pivotal rotation of the rolling pistons 16a and 18a, which are eccentrically rotated by a crankshaft, which will be described later.

An upper bearing 17 and a lower bearing 19 are positioned at the lower portion of the upper cylinder 16 and the lower portion of the upper cylinder 16. These bearings fix the cylinder and the rolling piston smoothly So that it can be turned.

On the other hand, the crankshaft 20 is arranged in the longitudinal direction inside the casing 12, and an unillustrated oil feeder is installed below the crankshaft 20. The oil feeder serves to supply the oil stored in the lower portion of the casing 12 to the inside of the oil passage 20a formed in the crank shaft 20.

The supplied oil is supplied to the surfaces of the upper and lower bearings in contact with the rolling piston through an oil supply hole formed to penetrate the crankshaft 20 so that lubricating action can be performed.

The transmission mechanism portion for rotating the crankshaft 20 is disposed on the upper portion of the casing 12. The transmission mechanism portion includes a stator 22 installed on the inner wall of the upper portion of the casing 12, And a rotor 24 disposed inside the crankshaft 22 and fixed to the upper portion of the crankshaft 20. Here, the rotor 24 is formed with a flow passage 24a passing through in the longitudinal direction of the casing 12, and the flow passage 24a is formed by passing the compressed refrigerant discharged from the upper and lower cylinders It is the euro.

The above-described embodiment 100 is mounted on the upper end of the crankshaft 20. Specifically, the upper end of the crankshaft (20)

The refrigerant is discharged from the cylinders, and a part of the oil may be mixed into the refrigerant. The refrigerant in which the oil is mixed is transferred to the upper portion of the casing through the oil passage 24a. Here, a coupling hole 20b extending in the longitudinal direction of the crankshaft 20 is formed in the upper portion of the crankshaft 20, and a thread is formed in the coupling hole 20b. Accordingly, the threaded portion 134 of the fixing bolt 130 can be screwed into the inside of the fastening hole 20b.

At this time, the disk portion 110 has a diameter enough to cover at least the upper portion of the flow path 24a, so that the refrigerant discharged through the flow path 24a flows into the bottom surface of the disk portion 110 So that the oil mixed in the refrigerant is attached to the disk portion 110 and separated from the refrigerant. The oil adhered to the disc portion 110 is scattered toward the inner wall of the casing 12 by centrifugal force generated when the disc portion 110 rotates together with the crankshaft and returns to the lower portion of the casing 12 by gravity .

In some cases, the disc portion 110 may have a larger diameter than the rotor, and the oil mixed in the refrigerant discharged through the gap between the rotor and the stator may be removed. When the size of the disc 110 is changed, it is possible to change the size of the disc 110 by replacing only the disc 110, not the whole oil separator, so that it can be commonly used for compressors having various shapes and sizes.

The above embodiments can be modified in various forms. For example, as shown in FIG. 4, an enlarged diameter portion 120a may be provided at the lower end of the sleeve 120 so that the upper end of the crankshaft can be inserted into the enlarged diameter portion 120a. As a result, not only can the oil separating device and the crankshaft be more firmly engaged but also the sleeve can be temporarily fixed to the crankshaft even when the mounting is not completed, so that the mounting can be facilitated.

The flange 122 may be formed to be flat in parallel with the disk 110, but may be formed to be inclined downward toward the center of the sleeve 120. 5, when the rim of the flange 122 'of the sleeve 120' is inclined such that the rim of the flange 122 'is located at an upper portion relative to the remaining portion, the disc portion 110 is fixed to the fixing bolt 130 The edge portion of the flange 122 'is first brought into contact with the disc portion. When the edge portion of the flange 122' is completely engaged, the edge portion strongly presses the bottom surface of the disc portion 110, .

It is also conceivable to form the protrusion 124 on the surface of the flange 122 "of the sleeve 120" as shown in Fig. The protrusion 124 has a substantially triangular cross section and presses the surface of the disc 110 when the disc 110 is pressed by the fixing bolt 130 to prevent the disc 110 from rotating . Here, the plurality of protrusions 124 may be irregularly arranged or may be arranged to extend radially.

1 is a perspective view illustrating an oil separator according to an embodiment of the present invention.

2 is an exploded perspective view showing the embodiment shown in Fig.

FIG. 3 is a sectional view showing a rotary compressor to which the embodiment shown in FIG. 1 is applied.

4 is a cross-sectional view showing a modified example of the sleeve of the embodiment shown in Fig.

5 is a sectional view showing another embodiment of the oil separator according to the present invention.

6 is a cross-sectional view showing still another embodiment of the oil separator according to the present invention.

Claims (13)

Casing; A compression mechanism disposed at a lower portion of the casing and including a crankshaft; A stator positioned above the compression mechanism; A rotor disposed inside the stator and fixed to the crankshaft; And And an oil separator fixed to an upper end of the crankshaft, Wherein the oil separator comprises: A disc portion covering at least a part of an upper portion of the rotor; A sleeve interposed between a bottom surface of the disc portion and an upper end of the crankshaft; And And a fixing bolt having one end supported on the upper surface of the disc portion and the other end passing through a through hole and a sleeve provided in the disc portion and fastened to a fastening hole provided in the crankshaft, Wherein the fixing bolt is formed with a flange-shaped contact portion in contact with the surface of the disk portion. delete delete delete delete The method according to claim 1, Wherein a flange is formed at an upper end of the sleeve so as to be in contact with a surface of the disk portion. The method according to claim 6, And at least one of the contact portion and the flange is provided with a latching portion for preventing the disk portion from rotating with respect to the sleeve. The method according to claim 1, And a washer is additionally provided between the fixing bolt and the disk. The method according to claim 1, Wherein the disk portion is made of a material different from the fixing bolt. delete delete delete delete

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