KR20130046347A - Rotary compressor - Google Patents

Abstract

PURPOSE: A rotary compressor is provided to cope with a size increase and a costs decrease of the compressor by making a central through-hole smaller by using a partition plate which is formed by a plurality of partition pieces. CONSTITUTION: A rotary compressor comprises a sealed container; an operation unit and a compression unit which are arranged inside the sealed container; and a crank shaft which delivers the rotation of the driving unit to the compression unit. The compression unit is formed to have a pair of compressing device units laminated by fitting a partition plate(30). The partition plate is formed by partition pieces(31,32) divided by a division surface in a radical direction. Holes(35a,35b,35c,35d,36a,36b) for bolts are formed respectively in the partition pieces. A pair of the holes for bolts is positioned to be symmetric around the partition pieces.

Description

Rotary compressor {ROTARY COMPRESSOR}

The present invention relates to a rotary compressor, in particular, a rotary compressor having a plurality of cylinders and having partition plates disposed between the cylinders.

The rotary compressor has a sealed container (hereinafter referred to as "shell"), a drive unit (hereinafter referred to as "motor") arranged in the shell, and a compression unit driven by a motor, and is supplied via a suction pipe. The refrigerant is cooled in the compression section and is discharged out of the shell via the discharge pipe. In addition, large capacity and low cost are required.

The compression section of the single-cylinder rotary compressor is disposed in the annular cylinder, the annular rotary piston disposed eccentrically, and the vane groove formed in the cylinder, and is arranged in the direction of the center axis of the cylinder. A crank shaft formed with an eccentric free vane, a spring for tightening the vane in the direction of the center axis of the cylinder, an eccentric portion for eccentrically rotating the rotary piston, and freely supporting the crank shaft, thereby closing both ends of the cylinder. It has a pair of borders.

Therefore, the inner circumferential surface of the cylinder, the outer circumferential surface of the rotary piston, and a pair of rims form a pair of spaces (hereinafter, referred to as "compression chambers") where the volume increases and decreases by eccentrically rotating vanes. It is divided into two. That is, the refrigerant sucked in the phase in which the volume gradually increases is a mechanism that is compressed in the phase in which the volume gradually decreases.

In addition, the compression section of the two-cylinder rotary compressor arranges the configuration (same as the compression mechanism section) of the single-cylinder rotary compressor in two layers (two stages), and the vane grooves are in a phase opposite to 180 °. It corresponds to what was arrange | positioned, The "partition board" is arrange | positioned instead of the frame between both cylinders. That is, the crankshaft has a pair of eccentric parts formed in the direction opposite to 180 degrees, penetrates through the center through-hole formed in the partition plate, and is rotatably supported by a pair of frame bodies.

At this time, the inner diameter of the center through hole is roughly equivalent to a value obtained by adding up the eccentricity of the pair of eccentric portions of the pair of crankshafts (exactly, slightly larger than the summed value).

Moreover, the compression mechanism part of the rotary compressor which has the cylinder number more than three cylinders arranges the compression mechanism part of the said single cylinder rotary compressor more than three layers (three steps), and both vane grooves are the direction of the center axis of a cylinder. It corresponds to what is arrange | positioned at the phase which does not overlap when seeing. At this time, the partition plate is arrange | positioned instead of the frame body between each cylinder. In addition, the crankshaft has three or more eccentric portions formed in phases which do not overlap when the direction of the axial center is viewed, and is rotatably supported by a pair of rims arranged at the stages (uppermost and lowermost layers). It penetrates the center through hole formed in the partition plate.

The refrigerant compressed in one cylinder is sequentially supplied to the other cylinder, compressed again, and compression of two or more stages is performed.

At this time, the inner diameter of the center through hole is roughly equivalent to the inner diameter corresponding to the virtual circle passing through the point farthest from the axial center of the eccentric portion of the three or more crankshafts (exactly slightly larger than the virtual circle diameter). Inner diameter).

In general, in a rotary compressor having two or more cylinders, when the maximum volume of the compression chamber is increased, (i) the cylinder is made high (axially long), (ii) the inner diameter of the cylinder is large (larger in the radial direction). And (iii) a method of increasing the amount of eccentricity of the crankshaft.

In the case of the above (i) or (ii), the compressor is enlarged and expensive. Therefore, in order to eliminate the cost increase by enlargement, the said (i) is normally performed.

However, as described above, the inner diameter of the center through hole formed in the partition plate increases as the amount of eccentricity of the eccentric portion of the crankshaft increases, so in (iii), compression of adjacent cylinders is performed via the center through hole having a large inner diameter. The threads communicate with each other, causing a "leakage flow path", resulting in a poor compression efficiency.

In addition, there is a method of sufficiently increasing the thickness of the rotary piston (thickness in the radial direction, 1/2 of the difference between the outer diameter and the inner diameter) so as not to generate a leakage flow path in the above (iii). In order to do this, it is necessary to increase the inner diameter of the cylinder. Then, in order to secure the difference between the outer diameter and the inner diameter (same thickness) of the cylinder in order to secure the amount of vane advancement and the strength of the cylinder, it is necessary to increase the outer diameter of the cylinder, thereby increasing the size of the compression mechanism (shell). Resulting in high cost.

Therefore, the partition plate which opposes two semi-circular members (henceforth a "dividing partition piece") in the rotary compressor which has two cylinders is disclosed. That is, a semi-circular notch is formed in the center of a straight line (flat) rim of the divided partition piece (hereinafter referred to as a "divided surface"), and the center through hole formed by the notch part when the divided partition piece is brought up together. The shaft portions between the eccentric portions of the crankshaft pass through.

That is, since the eccentric portion of the crankshaft does not need to penetrate the center through hole by assembling the axial portions between the eccentric portions of the crankshaft so that the partition plate pieces are fitted, the inner diameter of the center through hole (the notch portion) The value which doubled the radius of curvature can be made small about the outer diameter of the shaft part of a crankshaft (for example, refer patent document 1).

Patent document 1: Unexamined-Japanese-Patent No. 54-121405 (2nd page, FIG. 2)

However, the invention disclosed in Patent Document 1 has the following problems.

The partition plate disclosed in Patent Literature 1 is referred to as a bolt (hereinafter referred to as a "contact bolt") in the circumferential direction at two opposing positions of the outer circumference of the partitioned partition piece so that the partitioned surfaces are mutually pushed through the actual space between the partitioned surfaces. In addition, the upper and lower surfaces of the divided partition pieces are pinched by a pair of cylinders. Such pinching pressure is based on the fastening of the plural bolts (hereinafter, referred to as "assembly bolts") for integrating a partition plate, a pair of cylinders, and a pair of edges.

Therefore, when assembling the divided partition pieces, the respective divided partition pieces are unbalanced by the fastening force of the contact bolts or by the uneven fastening force by the plurality of assembling bolts, and the steps are divided into the divided surfaces of the divided partition pieces. May happen.

Therefore, a leakage flow path is formed between the rotary piston and the partition plate (butting partition partition piece), and there is a problem that the efficiency of the compressor deteriorates due to leakage loss.

Further, in order to suppress the formation of leakage flow paths, in order to suppress deformation due to the clamping force of the contact bolts, when the plate thickness of the divided partition piece is thickened, the length of the shaft portion between the eccentric portions of the crankshaft becomes longer, The distance between the bearings (provided in the border body) which supported the crankshaft becomes large. Then, in order to secure the strength of the crankshaft, it is necessary to thicken the crankshaft, which causes the large hardening of the other member, and raises the problem that cost increases by increasing the weight of a compressor.

The present invention has been made to solve the problems described above, and has a partition plate formed of a plurality of divided partition pieces, and is capable of suppressing the occurrence of a step difference between the divided surfaces of the divided partition pieces that abut. It aims to provide.

A rotary compressor according to the present invention includes a sealed container, a drive unit and a compression unit disposed in the sealed container, and a crank shaft for transmitting rotation of the drive unit to the compression unit, wherein the compression unit sandwiches a partition plate. Formed by a pair of stacked compression mechanism portions, the partition plate is formed by a plurality of partition partition pieces divided by radially divided partition surfaces, and each of the partition partition pieces is provided with holes for assembling bolts, When the partition plate is formed so as to form the partition plate, a pair of assembling bolt holes sandwiched between the dividing surfaces of the assembling bolt holes and opposed to each other are in a symmetrical position with respect to the dividing surface. In addition, the fastening force of the assembling bolts inserted into the pair of assembling bolt holes facing each other while sandwiching the divided surface among the assembling bolts are approximately equal. .

In the rotary compressor according to the present invention, since the partition plate is formed by a plurality of divided partition pieces, the center through hole can be made small, so that a large capacity and a low cost can be coped with, and the symmetrical position where the partition surface is interposed. Since the bolts for assembly bolts are formed in the joints, and the clamping forces of the assembly bolts inserted into the assembly bolt holes in the symmetrical positions are roughly equal, the generation of steps on the divided surface is suppressed, so that It becomes possible to suppress the deterioration of the compressor efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a sectional view of the rotary compressor according to Embodiment 1 of the present invention, as viewed from the side.
FIG. 2 is a cross-sectional view of a part of the rotary compressor shown in FIG. 1 (compression mechanism part) viewed from the side. FIG.
FIG. 3 is a cross-sectional view in plan view of a part (compression mechanism portion) of the rotary compressor shown in FIG. 1. FIG.
FIG. 4 is a plan view showing a part (partition plate) of the rotary compressor shown in FIG. 1. FIG.
FIG. 5 is a plan view showing a modification of a part (partition plate) of the rotary compressor shown in FIG. 1. FIG.

Embodiment 1

EMBODIMENT OF THE INVENTION Below, the rotary compressor which concerns on Embodiment 1 of this invention is demonstrated with reference to drawings.

1 to 5 schematically illustrate a rotary compressor according to a first embodiment of the present invention, in which FIG. 1 is a cross-sectional view of the whole side, and FIG. 2 is an enlarged view of a part (compression mechanism part). Sectional view seen from the side, FIG. 3 is a plan view which enlarges and shows a part (compression mechanism part), FIG. 4 is a plan view which shows a part (partition plate), and FIG. 5 shows a modification of a part (partition plate) Top view. In addition, since each figure is drawn typically, this invention is not limited to the form shown.

In FIGS. 1-4, the rotary compressor 100 is a shell 101 similarly to the shell 101 which is a sealed container, and the drive part (henceforth "motor") 102 which is a drive source provided in the inside of the shell 101. The compression part 103 provided in the inside of 101 is provided.

(Shell)

The shell 101 has an upper shell 101a and a lower shell 101b. The upper shell 101a has a glass terminal 104 for supplying electric power to the motor 102 from the outside, and a discharge pipe 105 for discharging the compressed refrigerant to the outside of the shell 101 (compressor 100). ) Is provided.

The lower shell 101b includes a motor 102, a first compression mechanism portion 10a and a second compression mechanism portion 10b constituting the compression portion 103, a first compression mechanism portion 10a, and a second compression mechanism portion. A first suction pipe 106a and a second suction pipe 106b are respectively fixed to 10b to guide the refrigerant. The 1st suction pipe 106a and the 2nd suction pipe 106b are connected to the suction muffler 107, and the gas-liquid separation of a refrigerant | coolant and the removal of the particle in a refrigerant | coolant are performed in the suction muffler 107.

In addition, in the following description, about the same content in the 1st compression mechanism part 10a and the 2nd compression mechanism part 10b, "1, 2" and the subscript "a, b" of a code | symbol form a name. May be omitted.

(motor)

The motor 102 has a stator 102a and a rotor 102b, and the rotor 102b is attached to the crankshaft 50 (which will be described in detail separately). The rotational torque generated by the motor 102 is transmitted to the first compression mechanism portion 10a and the second compression mechanism portion 10b by the crankshaft 50.

(Compression part)

The compression part 103 has the 1st compression mechanism part 10a and the 2nd compression mechanism part 10b laminated | stacked by sandwiching the partition plate 30. As shown in FIG.

The 1st compression mechanism part 10a is arrange | positioned at the inner peripheral part of the annular 1st cylinder 11a and the 1st cylinder 11a, and the annular shape which eccentrically rotates while contacting the inner peripheral surface of the 1st cylinder 11a. The first rotary piston (hereinafter referred to as "first piston") 12a and the first vane groove 13a formed in the first cylinder 11a to advance and retreat toward the direction of the central axis of the first cylinder 11a. The 1st vane 14a arrange | positioned freely and the 1st vane 14a are provided with the 1st spring 15a which fastens the outer periphery of the 1st piston 12a. At this time, the outer circumferential surface of the first piston 12a abuts linearly on the inner circumferential surface of the first cylinder 11a, and with the eccentric rotation, the linear contact position moves.

Similarly, the 2nd compression mechanism part 10b is arrange | positioned at the inner peripheral part of the annular 2nd cylinder 11b and the 2nd cylinder 11b, and rotates eccentrically while contacting the inner peripheral surface of the 2nd cylinder 11b. The direction of the center axis of the 2nd cylinder 11b is made to the annular 2nd rotary piston (henceforth a "2nd piston") 12b, and the 2nd vane groove 13b formed in the 2nd cylinder 11b. The 2nd vane 14b arrange | positioned freely toward and behind and the 2nd spring 15b which hold | maintain the 2nd vane 14b to the outer periphery of the 2nd piston 12b are provided. At this time, the outer circumferential surface of the second piston 12b abuts linearly on the inner circumferential surface of the second cylinder 11b, and with the eccentric rotation, the linear contact position moves.

(Assembling of compression mechanism part)

One end face (upper surface) of the 1st cylinder 11a is covered by the 1st frame 20a in which the 1st frame bolt hole 21a was formed, and the other of the 1st cylinder 11a was covered. The end surface (lower surface) of the side is covered with the partition plate 30 in which the center through-hole 33 and the assembling through-holes 35 and 36 (this is demonstrated in detail separately) were formed. Moreover, one end surface (lower surface) of the 2nd cylinder 11b is covered by the 2nd frame 20b in which the 2nd frame bolt hole 21b was formed, and the other of the 2nd cylinder 11b was carried out. The cross section (upper surface) of is covered by the partition plate 30.

And the 1st frame bolt hole 21a for assembly and the 2nd frame bolt hole 21b are respectively formed in the 1st frame 20a and the 2nd frame 20b, respectively. .

Moreover, the 1st cylinder bolt hole 16a for assembly and the 1st cylinder bolt screw 17a are formed in the 1st cylinder 11a, and the 2nd cylinder bolt for assembly is formed in the 2nd cylinder 11b. The hole 16b and the screw 17b for 2nd cylinder bolts are formed.

And the 1st assembly shortening bolt 71a which penetrates the 1st frame bolt hole 21a, and is screwed to the 1st cylinder bolt screw 17a has the 1st frame 20a and a 1st cylinder A second assembling short bolt 71b, which joins 11a and penetrates through the second frame bolt hole 21b and is screwed to the second cylinder bolt screw 17b, has a second frame 20b. ) And the second cylinder 11b are joined.

Further, the second cylinder bolt screw 17b penetrates through the first frame bolt hole 21a, the first cylinder bolt hole 16a, the assembling through hole 35, or the assembling bolt hole 36. 1) long assembly bolt 72a for screwing, 2nd frame bolt hole 21b, 2nd cylinder bolt hole 16b, through hole 35 for assembling or assembling bolt hole A second assembling long bolt 72b, which penetrates through 36 and is screwed into the first cylinder bolt screw 17a, attracts the first frame 20a and the second frame 20b, and The partition plate 30 is pinched through the 1st cylinder 11a and the 2nd cylinder 11b.

(Compression room)

Therefore, the 1st space 40a surrounded by the inner peripheral surface of the 1st cylinder 11a, the outer peripheral surface of the 1st piston 12a, the lower surface of the 1st frame 20a, and the upper surface of the partition plate 30 is 1st. The contact between the inner circumferential surface of the cylinder 11a and the outer circumferential surface of the first piston 12a (approximately linearly abutted), and the contact between the outer circumferential surface of the first vane 14 and the first piston 12a ( (Abutting in a substantially linear shape) is divided into two in the circumferential direction.

Similarly, the second space 40b surrounded by the inner circumferential surface of the second cylinder 11b, the outer circumferential surface of the second piston 12b, the upper surface of the second frame 20b, and the lower surface of the partition plate 30 is formed in the first direction. It is divided into two in the circumferential direction by the contact between the inner circumferential surface of the two cylinders 11b and the outer circumferential surface of the second piston 12b and the outer circumferential surface of the second vane 14b and the second piston 12b. (See Figure 3).

(crankshaft)

As for the crankshaft 50, the 1st bearing insertion part 52a, the partition plate insertion part 53, and the 2nd bearing insertion part 52b are arrange | positioned coaxially, and the 1st bearing insertion part 52a and the partition plate The first eccentric part 51a which is eccentric toward one side is formed between the insertion part 53, and the eccentric agent which is eccentric toward the other between the 2nd bearing insertion part 52b and the partition plate insertion part 53. 2 eccentric parts 51b are formed.

At this time, the 1st eccentric part 51a and the 2nd eccentric part 51b oppose (the eccentric direction differs 180 degrees), and is parallel to an axial center.

In addition, the first bearing insert 52a is rotatably supported by the first bearing 25a provided on the inner circumferential surface of the first frame 20a, and the second bearing insert 52b is the second frame 20b. It is rotatably supported by the second bearing 25b provided on the inner circumferential surface of the partition plate, and the partition plate inserting portion 53 penetrates through the central through hole 33 formed in the center of the partition plate 30.

(Compression of refrigerant)

And since the 1st eccentric part 51a penetrates the inner peripheral part of the 1st piston 12a, and the 2nd eccentric part 51b penetrates the inner peripheral part of the 2nd piston 12b, rotation of a crankshaft is carried out. By this, the 1st piston 12a and the 2nd piston 12b are eccentrically rotated in the state which 180 degree phase differs with respect to the other one (refer FIG. 3 (a) and (b)).

For this reason, by the rotation of the crankshaft 50, the space of one side of the 1st space 40a divided into two gradually increases, and the space of the other direction of the 1st space 40a divided into 2 The volume gradually decreases. That is, since the 1st suction port (not shown) is formed in the position corresponded to the said one space, and the 1st discharge port (not shown) is formed in the position corresponded to the said other space, a refrigerant | coolant is a 1st After suctioned at the inlet, it is compressed and discharged from the first outlet.

(Partition board)

In FIG. 4, the partition plate 30 is a rough disk having a central through hole 33 formed in the center thereof. In the divided surface 34, the first partition partition piece 31 and the second partition partition piece ( It is divided into 32, and the dividing surface 34 is formed along radial direction (parallel with the direction which the 1st vane 14a and the 2nd vane 14b advancing and retreating). In addition, although the division surface 34 is corresponded to the surface which the 1st plane formed in the 1st division partition piece 31 and the 2nd plane formed in the 2nd division partition piece 32 abut, for convenience of description, Not only the meaning of the surface where the first plane and the second plane abut, but also the first plane and the second plane may mean each.

In addition, the 1st partitioning partition piece 31 has the axial 1st assembly bolt holes 35a, 35b, 35c, and 35d of the axial direction which were roughly conformally arranged along the outer peripheral surface, and arc-shaped agent in the center of the division surface 34. As shown in FIG. 1 notch part 33a is formed, and the 2nd partitioning partition piece 32 has the arc holes of 2nd assembly bolts 36a and 36b of an axial direction along the outer peripheral surface, and the arc-shaped material in the center of the division surface 34. As shown in FIG. 2 notch part 33b is formed.

(Step)

At this time, when the partition plate 30 is formed by abutting the first partition partition piece 31 and the second partition partition piece 32, a pair of "for first assembling" which faces the partition surface 34 and faces each other is formed. The bolt hole 35a and the second bolt hole 36a for the assembling are in a symmetrical position with respect to the dividing surface 34. Similarly, the pair of “first assemblings” with the dividing surface 34 interposed therebetween. The hole 35d for bolts and the hole 36b for second assembling are located in a symmetrical position with respect to the divided surface 34.

Further, the fastening force (F35a) of the assembling bolt inserted into the first assembling bolt hole 35a (see Fig. 2) and the assembling bolt inserted into the second assembling bolt hole 36a (see Fig. 2), F36a) is roughly equivalent (F35a = F36a).

Similarly, the fastening force (F35d) of the assembling bolt inserted into the first assembling bolt hole 35d (see Fig. 2) and the assembling bolt inserted into the second assembling bolt hole 36b (Fig. 2) F36b) is roughly equivalent (F35d = F36b).

Therefore, since the range close to the dividing surface 34 of the 1st divisional partition piece 31 and the 2nd divisional partition piece 32 performs the same deformation | transformation (axially compressive deformation) in rough symmetry, the division surface 34 is carried out. Since the plate thickness (plate thickness after deformation | transformation) between the 1st division partition piece 31 and the 2nd division partition piece 32 in is roughly the same, it becomes possible to suppress generation | occurrence | production of a level | step difference. Therefore, since no leakage flow path is formed between the first space 40a and the second space 40b, it is possible to prevent the compressor from deteriorating in efficiency due to leakage loss.

Moreover, the value which totaled the clamping force F35a, F35b, F35c, F35d of the assembly bolt inserted in the 1st assembly bolt holes 35a, 35b, 35c, 35d of the 1st division partition piece 31, respectively ( F35 = F35a + F35b + F35c + F35d), the surface pressure per unit area (F35 / S31) divided by the contact area (S31) between the 1st division partition piece 31, and the cross section of the cylinder 11, and the 2nd division The second divided partition piece is the value (F36 = F36a + F36b) obtained by adding together the tightening forces (F36a, F36b) of the assembling bolts respectively inserted into the second assembling bolt holes 36a and 36b of the partition piece 32. The surface pressure (F36 / S32) per unit area divided by the contact area S32 between (32) and the cross section of the cylinder 11 is roughly equal.

Therefore, it becomes possible to further suppress the generation of steps in the dividing surface 34, and since no leakage flow path is formed between the first space 40a and the second space 40b, the efficiency of the compressor due to leakage loss. The deterioration can be further prevented.

(Contact bolts)

On the outer periphery of the 1st divisional partition piece 31 and the outer periphery of the 2nd division partition piece 32, the 1st notch part 63a, 63b and the 2nd notch part 65a, 65b are formed, respectively, and the divided surface ( The first flange 64a and 64b and the second flange 66a and 66b are formed at both ends of the 34, and the contact bolt screw 61a perpendicular to the dividing surface 34 is formed in the first flange 64a and 64b. 61b are formed, and similarly, contact bolt holes 62a and 62b perpendicular to the dividing surface 34 are formed in the second flanges 66a and 66b.

Therefore, the first partition partition piece 31 is inserted by inserting the contact bolts 60a and 60b into the contact bolt holes 62a and 62b and screwing them with the contact bolt screws 61a and 61b. And the second divided partition piece 32 may be brought into contact with each other on the divided surface 34. Therefore, before the partition plate 30 is pinched by the 1st cylinder 11a etc., it is possible to abut so that the surface of the 1st division partition piece 31 and the 2nd division partition piece 32 may be coplanar. It is.

In addition, although the 1st flanges 64a and 64b and the 2nd flanges 66a and 66b are formed in the both ends of the division surface 34 above, this invention is not limited to this, The 2nd notch part ( The position where the head of the contact bolt abuts against the first contact bolt holes 62a and 62b by omitting the formation of the 65a and 65b or by omitting the formation of the first notch portions 63a and 63b. Digging) may be provided.

In addition, although the bolt screw is formed in the 1st division partition piece 31 and the hole for a bolt is formed in the 2nd division partition piece 32 above, this invention is not limited to this, A 1st partition partition piece The bolt screw and the bolt hole may be formed in the 31, and the bolt hole and the bolt screw may be formed at positions of the second divided partition pieces 32 corresponding to these, respectively.

(Modified example of the partition plate)

The partition plate 300 shown in FIG. 5 is a modified example of the partition plate 30 shown in FIG. 4, and is formed of a first semi-circular partition plate 310 and a second partition partition piece 320 having a semicircular shape. It is. In addition, for convenience of description, the same part or equivalent site | part as the partition plate 30 attaches | subjects the same code | symbol, and abbreviate | omits description of a part.

In FIG. 5, the 1st divisional partition piece 310 and the 2nd divisional partition piece 320 in the partition plate 300 are substantially semi-circle shape, and are substantially symmetrical which made the division surface 34 the symmetry plane.

Then, the first assembling bolt pieces 310 are formed with the first assembling bolt holes 35a, 35b, and 35c, and the second dividing partition piece 320 is provided with the second assembling bolt holes 36a, 36b, 36c) is formed. Then, the first assembling bolt hole 35a and the second assembling bolt hole 36a are disposed at symmetrical positions with respect to the divided surface 34, and the first assembling bolt hole 35c and the first assembling bolt hole 35a are formed. The 2 bolts for assembly 36c are arrange | positioned at the symmetrical position with respect to the dividing surface 34. As shown in FIG.

Further, the fastening force (F35a) of the assembling bolt inserted into the first assembling bolt hole 35a (see Fig. 2) and the assembling bolt inserted into the second assembling bolt hole 36a (see Fig. 2), F36a) is roughly equivalent (F35a = F36a), and the assembly bolt inserted into the 1st assembly bolt hole 35c (refer FIG. 2), and the assembly bolt inserted into the 2nd assembly bolt hole 36c. Fastening force F35c, F36c (refer FIG. 2) is roughly equal (F35c = F36c).

(Step)

Therefore, since the range close to the dividing surface 34 of the 1st dividing partition piece 310 and the 2nd dividing partition piece 320 performs roughly the same deformation | transformation (axially compressive deformation), the dividing surface 34 Since the plate thickness (plate thickness after deformation) between the first divided partition piece 310 and the second divided partition piece 320 in is substantially the same, it is possible to suppress the occurrence of a step. Therefore, since no leakage flow path is formed between the first space 40a and the second space 40b, it is possible to prevent deterioration of the efficiency of the compressor due to leakage loss.

The total value of the fastening forces F35a, F35b, and F35c of the first assembling bolts inserted into the first assembling bolt holes 35a, 35b, and 35c of the first divided partition piece 310 (F35 = F35a + F35b + F35c), the surface pressure (F35 / S31) per unit area divided by the contact area S31 of the 1st divided partition piece 31, and the cross section of the cylinder 11, and the 2nd divided partition piece 32 The second sum of the values (F36 = F36a + F36b + F36c) obtained by summing the tightening forces F36a, F36b, and F36c of the assembling bolts respectively inserted into the second assembling bolt holes 36a, 36b, and 36c. Since the surface pressure F36 / S32 per unit area divided by the contact area S32 between the partition piece 32 and the cross section of the cylinder 11 is roughly equal, the occurrence of the step can be further suppressed. Therefore, since no leakage flow path is formed between the first space 40a and the second space 40b, the deterioration of the efficiency of the compressor due to leakage loss can be further prevented.

(Compression part)

As mentioned above, the compression part of this invention can be described as follows. "An annular cylinder, an annular rotary piston disposed eccentrically while being in contact with an inner circumferential surface of the cylinder, and a vane groove formed in the cylinder, advancing in the direction of the center axis of the cylinder A vane disposed freely, and a spring that secures the vane to the outer circumference of the rotary piston,

The space surrounded by the frame covering one end face of the cylinder, the partition plate covering the other end face of the cylinder, the inner circumferential surface of the cylinder, and the outer circumferential surface of the rotary piston is divided into two into the compression chamber by the vanes. ,

The crankshaft includes a pair of eccentric parts which are eccentric in opposite directions, is rotatably supported by bearing means provided in the frame, and passes through a central through hole formed in the partition plate,

The eccentric portion of the crankshaft penetrates the inner circumferential portion of the rotary piston, respectively, and increases the volume of one of the compression chambers by eccentrically rotating the rotary piston by rotation of the crankshaft. It reduces the volume of the other compression chamber of the compression chamber.

[Other Embodiments]

As mentioned above, although the compression part 103 was formed with the 1st compression mechanism part 10a and the 2nd compression mechanism part 10b, this invention is not limited to this, The compression part 103 has three or more layers. It may have three or more compression mechanisms laminated.

For example, in the case of the 3rd floor, the compression mechanism located in the stage (the uppermost) corresponds to the same 1st partition board instead of the partition board 30 of the 1st compression mechanism part 10a, The compression mechanism located at the end (bottommost) corresponds to the same second partition plate instead of the partition plate 30 of the second compression mechanism portion 10b, and the intermediate compression mechanism portion is the first compression. In place of the first frame 20a and the partition plate 30 of the mechanism portion 10a (or in place of the second frame 20b and the partition plate 30 of the second compression mechanism 10b), It corresponds to the back of a 1st partition board and a 2nd partition board. The crankshaft is provided with three eccentric portions which are eccentric in the upper direction, respectively.

Moreover, in the case of four or more layers, the intermediate | middle compression mechanism part in the case of three layers is laminated | stacked over several layers. The crankshaft is provided with four or more eccentric parts which are eccentric in the direction different from each other.

In addition, the refrigerant compressed by the respective compression mechanisms may be discharged into the shell (one-stage compression), or the refrigerant compressed by one compression mechanism may be supplied to the other compression mechanism and compressed again (multi-stage compression). ).

(Compression part)

As mentioned above, the compression part of this invention can be described as follows. "An annular cylinder, an annular rotary piston disposed eccentrically while being in contact with an inner circumferential surface of the cylinder, and a vane groove formed in the cylinder, advancing in the direction of the center axis of the cylinder A vane disposed freely and a spring for pushing the vane to the outer circumference of the rotary piston,

The compression mechanism portion disposed in the intermediate layer of the compression mechanism portion includes a pair of spaces surrounded by the pair of partition plates, the inner circumferential surface of the cylinder, and the outer circumferential surface of the rotary piston, respectively covering both end surfaces of the cylinder. Divided into two compression chambers,

The compression mechanism portion disposed in the layer at the end of the compression mechanism portion includes an edge covering one end face of the cylinder, the partition plate covering the other end face of the cylinder, an inner circumferential surface of the cylinder, and an outer circumferential face of the rotary piston. The space surrounded by is divided into two pairs of compression chambers by the vanes,

The crankshaft has an eccentric portion which is eccentric in directions different from each other, is rotatably supported by a bearing means provided on the frame, and passes through a central through hole formed in the partition plate,

The eccentric portion of the crankshaft penetrates the inner circumferential portion of the rotary piston, respectively, and increases the volume of one of the compression chambers by eccentrically rotating the rotary piston by rotation of the crankshaft. The volume of the compression chamber on the other side of the compression chamber is reduced.

10a: 1st compression mechanism part 10b: 2nd compression mechanism part
11a: first cylinder 11b: second cylinder
12a: first piston 12b: second piston
13a: 1st vane groove 13b: 2nd vane groove
14a: first vane 14b: second vane
15a: first spring 15b: second spring
16a: hole for the first cylinder bolt 16b: hole for the second cylinder bolt
17a: screw for 1st cylinder bolt 17b: screw for 2nd cylinder bolt
20a: first frame 20b: second frame
21a: hole for first frame bolt 21b: hole for second frame bolt
25a: first bearing 25b: second bearing
30: partition plate 31: first partition partition
32: second division partition 33: center through hole
33a: first notch 33b: second notch
34: dividing surface 35: hole for the first assembly bolt
35a: hole for first assembly bolt 35b: hole for first assembly bolt
35c: hole for the first assembly bolt 35d: hole for the first assembly bolt
36: hole for 2nd assembly bolt 36a: hole for 2nd assembly bolt
36b: hole for the second assembly bolt 36c: hole for the second assembly bolt
40a: space 40b: space
50: crankshaft 51a: first eccentric portion
51b: 2nd eccentric part 52a: 1st bearing insertion part
52b: second bearing insert 53: partition plate insert
60a: contact bolt 60b: contact bolt
61a: abutment bolt screw 61b: abutment bolt screw
62a: hole for contact bolt 62b: hole for contact bolt
63a: first notch 63b: first notch
64a: first flange 64b: first flange
65a: second notch 65b: second notch
66a: second flange 66b: second flange
71a: Short assembly bolt for first assembly 71b: Short assembly bolt for second assembly
72a: long bolt for first assembly 72b: long bolt for second assembly
100: rotary compressor (compressor) 101: shell
101a: upper shell 101b: lower shell
102: motor 102a: stator
102b: rotor 103: compression
104: glass terminal 105: discharge pipe
106a: first suction pipe 106b: second suction pipe
107: suction muffler 300: partition plate
310: division partition piece 320: division partition piece

Claims (3)

An airtight container, a drive unit and a compression unit disposed in the airtight container, and a crank shaft for transmitting rotation of the drive unit to the compression unit,
The compression section is formed by a pair of compression mechanism sections sandwiched by sandwiching partition plates,
The partition plate is formed by a plurality of divided partition pieces divided by radially divided planes, and each of the divided partition pieces is provided with holes for assembling bolts, and the partition partition pieces are opposed to each other to form the partition plate. At one time, a pair of assembling bolt holes which face the dividing surface of the assembling bolt holes and face each other are in a symmetrical position with respect to the dividing surface, and the dividing surface among the assembling bolts is sandwiched. A rotary compressor, characterized in that the clamping forces of the assembling bolts inserted into a pair of bolt holes for assembling opposite to each other are approximately equal. An airtight container, a drive unit and a compression unit disposed in the airtight container, and a crank shaft for transmitting rotation of the drive unit to the compression unit,
The compression section is formed by three or more compression mechanism sections sandwiching partition plates and stacked in three or more layers,
The partition plate is formed by a plurality of divided partition pieces divided by radially divided planes, and each of the divided partition pieces is provided with holes for assembling bolts, and the partition partition pieces are opposed to each other to form the partition plate. At one time, a pair of assembling bolt holes which face the dividing surface of the assembling bolt holes and face each other are in a symmetrical position with respect to the dividing surface, and the dividing surface among the assembling bolts is sandwiched. A rotary compressor, characterized in that the clamping forces of the assembling bolts inserted into a pair of bolt holes for assembling opposite to each other are approximately equal. 3. The method according to claim 1 or 2,
The surface pressure per unit area obtained by dividing the sum of the tightening forces of the assembling bolts inserted into the assembling bolt holes formed in the dividing partition piece by the contact area between the divided partition piece and the end face of the cylinder is equal to the dividing partition piece. Rotary compressors, each of which is roughly equivalent.

Images