KR20110003883A - Compressor - Google Patents

Abstract

PURPOSE: A compressor is provided to ensure smooth rotation of a rotary shaft because a stepped part is formed on the interior of the flow passage of the rotary shaft so that the oil mixed with coolant gathers in the stepped part. CONSTITUTION: A compressor(100) comprises a front housing(110), a rear housing(120), a front cylinder block(130), a rear cylinder block(130'), a rotary shaft(140), and a plurality of pistons. The front and rear cylinder blocks are located between the front housing and the rear housing, a cylinder bore(135) passes through the cylinder block, and a swash plate chamber is formed inside the cylinder block. The rotary shaft is pivotally inserted into shaft bearing holes(131) formed in the front and rear cylinder blocks and rotates a swash plate(142) located in the swash plate chamber. A flow passage(147) for transferring working fluid drawn into the compressor to the cylinder bore is formed in the rotary shaft. The pistons reciprocate inside the cylinder bore according to the rotation of the swash plate. A stepped part(147') is formed in the position corresponding to the exit(148') of the flow passage connected to the cylinder bore so that the coil flowing along the interior of the flow passage gathers in the stepped part and flows between the exterior of the rotary shaft and the interior of the shaft bearing hole.

Description

Compressor

The present invention relates to a compressor, and more particularly, to a compressor having a boss portion protruding toward one side of a cylinder block constituting a swash plate type compressor to support a rotating shaft.

In general, the compressor used in the air conditioning system of the automobile sucks the working fluid from the evaporator to the high temperature and high pressure which is easy to liquefy, and delivers it to the condenser.

In such a compressor, a configuration for compressing a working fluid includes a reciprocating type that performs compression while reciprocating and a rotary type that performs compression while rotating. The reciprocating type includes a crank type for transmitting a driving force of a driving source using a crank shaft, a swash plate for transferring a rotating shaft provided with a swash plate, and a wobble plate type using a wobble plate. Rotary type includes vane rotary type using rotary rotary shaft and vane, and scroll type using rotary scroll and fixed scroll.

1 and 2 disclose a configuration of a general swash plate compressor. A schematic configuration of a swash plate compressor will be described with reference to the drawings. The front housing 10, the rear housing 20, and the front and rear cylinder blocks 30 and 30 ′ form the skeleton and the appearance of the compressor 1. A rotating shaft 40 is installed through the center of the front housing 10 and the front and rear cylinder blocks 30 and 30 ', and the rotating shaft 40 is rotated by an external driving force. The front housing 10 and the rear housing 20 are coupled to the outside of the front and rear cylinder blocks 30 and 30 ', respectively.

The piston 50, which linearly reciprocates by the rotation of the rotary shaft 40, is installed in the cylinder bore 35 of the front and rear cylinder blocks 30, 30 ', and compresses the working fluid compressed by the cylinder bore 35. A valve unit 60 for controlling discharge is installed between the front housing 10 and the front cylinder block 30 and between the rear housing 20 and the rear cylinder block 30 '. The front housing 10, the rear housing 20, the front and rear cylinder blocks (30, 30 ') are fastened to each other by a fixing bolt 70, the fixing bolt 70 is the front housing 10, the rear housing 20, penetrates the front and rear cylinder blocks 30 and 30 '. To this end, the bolt holes 10 'and 20' are formed in the front housing 10 and the rear housing 20.

Now, the detailed configuration of each component described above will be described. First, the front housing 10 has a cylindrical hole 12 through which the rotating shaft 40 passes through the center in a substantially disk shape. The shaft hole 12 penetrates the center of the protrusion 13 protruding to the center of one surface of the front housing 10. The discharge chamber 14 is recessed on the opposite surface on which the protrusion 13 of the front housing 10 is formed. The discharge chamber 14 is formed over a substantially ring-shaped region, and selectively communicates with each cylinder bore 35 of the front cylinder block 30 through the valve unit 60.

The rear housing 20 is mounted on one surface of the rear cylinder block 30 '. The discharge chamber 22 is formed on the surface of the rear housing 20 facing the rear cylinder block 30 '. The discharge chamber 22 is selectively formed to communicate with the cylinder bores 35 formed in the rear cylinder block 30 'through the valve unit 60.

 The front and rear cylinder blocks 30 and 30 'are recessed portions formed on surfaces coupled to each other to form the swash plate chamber 31. In the swash plate chamber 31, a swash plate 42 installed on the rotating shaft 40 is rotatably positioned. The shaft support hole 32 is formed through the front and rear cylinder blocks 30 and 30 '. The rotary shaft 40 penetrates the shaft support hole 32.

A plurality of cylindrical cylinder bores 35 are formed in the front and rear cylinder blocks 30 and 30 'in the direction of forming the shaft support hole 32 with the shaft support hole 32 as the center. Of course, the cylinder bores 35 are formed at positions corresponding to the front and rear cylinder blocks 30 and 30 ', respectively.

The cylinder bore 35 and the shaft support hole 32 communicate with each other through the suction passage 36, respectively. The suction passage 36 allows the working fluid delivered through the inside of the rotating shaft 40 to be delivered to the cylinder bore 35, respectively.

Discharge passages 38 are formed in the front and rear cylinder blocks 30 and 30 ′ so as to communicate with the discharge chambers 14 and 22 of the front and rear housings 10 and 20, respectively. The discharge passage 38 serves as a passage for discharging the working fluid compressed in the cylinder bore 35 to the outside.

The front cylinder block 30 is provided with a boss portion (39). The boss portion 39 is provided to protrude at the edge of the shaft support hole 32 of the front cylinder block 30, in contact with the outer surface of the rotary shaft 40 to support the rotary shaft 40, to improve the sealing Play a role.

On the other hand, the rotary shaft 40 has one end penetrates through the front housing 10 and the middle portion penetrates the front and rear cylinder blocks 30 and 30 '. An approximately disk-shaped swash plate 42 is inclined with respect to the extending direction of the rotating shaft 40 on the rotating shaft 40.

The center of the swash plate 42 is provided with a hub 44 having a cylindrical shape, the rotation shaft 40 penetrates through the hub 44. A communication hole 44 ′ is drilled through the hub 44 so as to communicate with the inside of the rotation shaft 40.

At this time, the rotary shaft 40 is pressed into the assembly hole 44 ″ formed in the swash plate 42 to assemble the rotary shaft 40 and the swash plate 42. More specifically, the rotary shaft 40 is inserted into the assembly hole 44 '' in a state where the swash plate 42 is heated to expand the inner diameter of the assembly hole 44 '', and then cooled and rotates the rotary shaft ( 40 is manufactured to be firmly fixed to the assembling hole 44 ''.

Then, a plurality of shoes 45 surrounding the edge of the swash plate 42 is installed. The shoe 45 is configured to move along the edge of the swash plate 42. Bearings 46 are provided between both ends of the swash plate 42 and the cylinder blocks 30 and 30 ', respectively.

The flow path 47 through which the working fluid flows is formed in the rotary shaft 40. The flow passage 47 is formed long in the longitudinal direction of the rotation shaft 40 inside the rotation shaft 40. An inlet 48 and an outlet 48 ′ are formed on the outer surface of the rotation shaft 40. The inlet 48 communicates the swash plate chamber 31 and the flow path 47, and the outlet 48 ′ may communicate with the suction passage 36 of the front and rear chamber cylinder blocks 30 and 30 ′. It is formed in the position. The position of the outlet 48 ′ should be formed in accordance with the compression order of the working fluid proceeding in each cylinder bore 35. Reference numeral 49 is a shaft sealing portion that prevents the gap between the inner surface of the shaft hole 12 of the front housing 10 and the outer surface of the rotary shaft 40.

Piston 50 is to linearly reciprocate the inside of the cylinder bore (35). The piston 50 has a substantially cylindrical shape corresponding to the inside of the cylinder bore 35, and both ends thereof are positioned at the cylinder bores 35 of the front and rear cylinder blocks 30 and 30 ', respectively. That is, both ends of each of the one piston 50 serves to compress the working fluid in the cylinder bore (35). The piston 50 is coupled to the middle of the shoe 45, the linear reciprocating motion in accordance with the rotation of the swash plate 42.

The valve unit 60 is used to control the discharge of the working fluid compressed in the cylinder bore 35 to the outside of the cylinder bore 35. The valve unit 60 includes a valve plate 62 which is installed in close contact with one surface of the front and rear cylinder blocks 30 and 30 ', and the valve plate 62 corresponds to each cylinder bore 35. The discharge hole 64 is formed in the position. Discharge leads 66 are used to selectively open and close the discharge holes 64, respectively. The discharge lead 66 may be elastically deformed and elastically deformed according to the pressure of the working fluid in the cylinder bore 35 to open and close the discharge hole 64.

The valve plate 62 is formed in a substantially disk-shaped communication hole 67 at a position corresponding to the discharge passage 38. The communication hole 67 serves to communicate the respective discharge chambers 14 and 22 with the discharge passage 38.

A muffler 68 is formed on the outer surface of the front and rear cylinder blocks 30 and 30 'so as to communicate with the discharge passage 38. The muffler 68 serves to reduce pulsation and noise of the working fluid. The muffler 68 is formed with a discharge port 69 for discharging the working fluid to the outside (condenser) of the compressor (1). For reference, a suction port (not shown) for transmitting a working fluid into the swash plate chamber 31 of the compressor 1 is formed at one side of the front and rear cylinder blocks 30 and 30 '. Reference numerals 16 and 18 denote oil chambers and communication paths, respectively.

The operation of the general compressor 1 having such a configuration will be described. As the rotary shaft 40 rotates by a driving force transmitted from the outside, the swash plate 42 is rotated with the rotation of the rotary shaft 40. Rotation of the swash plate 42 allows the piston 50 to make a straight reciprocating motion inside the cylinder bore 35.

At this time, as the rotary shaft 40 rotates, the flow passage 47 inside the rotary shaft 40 communicates with the cylinder bore 35 through the outlet 48 'and the suction passage 36. The communication between the flow passage 47 and the cylinder bore 35 allows the working fluid sucked into the swash plate chamber 31 to be transferred to the cylinder bore 35. For reference, the working fluid is sucked into the cylinder bore 35 when the piston 50 is located at the bottom dead center of the corresponding cylinder bore 35.

When the working fluid is transferred to the cylinder bore 35, and the piston 50 of the corresponding cylinder bore 35 moves in the direction of the valve plate 62, compression of the working fluid occurs. When the working fluid is compressed in the cylinder bore 35, the pressure inside the cylinder bore 35 becomes relatively high, and the discharge hole 64 is elastically deformed by pushing the tip of the discharge lead 66. Open.

In this case, the working fluid compressed through the discharge hole 64 is transferred to the discharge chambers 14 and 22, and the working fluid delivered to the discharge chambers 14 and 22 is communicated through the communication hole 67. It is delivered to the muffler 68 via the discharge passage 38, and is transferred from the muffler 68 to the condenser through the discharge port 69.

However, the conventional compressor as described above has the following problems.

Refrigerant flows through the flow path 47 of the rotary shaft 40, and the refrigerant is lubricated.

Oil is mixed for. Accordingly, when the rotary shaft 40 is rotated centrifugal force

The oil having a relatively high density among the mixture of the refrigerant and the oil

Refrigerant flowing along the inner circumferential surface of the furnace 47 and having a relatively small density of the

It will flow along the center.

In this process, the refrigerant is introduced into the cylinder bore 35 through the suction passage 36, and the oil is also moved along the inner circumferential surface of the flow passage 47 and eventually into the cylinder bore 35 through the suction passage 36. Inflow. This is because a space in which oil can be stored is not formed inside the flow path 47.

In addition, the oil introduced into the cylinder bore 35 is compressed and discharged together with the refrigerant by the piston 50, thereby causing a decrease in the performance of the air conditioner.

Therefore, an object of the present invention is to solve the problems of the prior art as described above,

 According to a feature of the present invention for achieving the object as described above, the present invention is located between the front and rear housings and the front and rear housings to form the outer appearance of at least both ends of the compressor, a plurality of cylinder bores surrounding the center Is formed so as to penetrate, the front and rear cylinder blocks having a swash plate chamber therein, and the swash plate is rotatably provided in the axial support hole formed in the front and rear cylinder block is installed to be rotatable and the compressor A compressor comprising: a rotating shaft for forming a flow path for transferring a working fluid sucked into the cylinder bore; and a plurality of pistons linearly reciprocating in the cylinder bore according to the rotational motion of the swash plate, the inner circumferential surface of the flow path. The stepped portion is provided at a position corresponding to the outlet of the flow passage in communication with the cylinder bore , Five days are flowed along the inner circumferential surface of the flow path is goyige to the step portion is introduced between the outer surface and the inner surface of the shaft support of the rotary shaft jigong.

The stepped portion is formed continuously around the inner circumferential surface of the flow path.

The rotating shaft is formed with a guide groove connected to one end of the stepped portion and connecting between the flow path and the outer surface of the rotating shaft.

According to the compressor according to the present invention, the following effects can be expected.

In the present invention, the stepped portion is provided on the inner surface of the flow path of the rotating shaft constituting the compressor, the oil mixed with the refrigerant is accumulated in the stepped portion, the oil accumulated in the stepped portion is again the outer surface of the rotating shaft and the inner surface of the shaft support hole along the outlet edge of the flow path It is effective to smooth the rotation of the rotary shaft by flowing through the lubrication function.

In addition, since the oil is separated from the refrigerant and flows between the outer surface of the rotating shaft and the inner surface of the shaft support hole, the oil is compressed with the refrigerant to prevent the performance of the compressor from being lowered.

In addition, in the present invention, a guide groove connected to the stepped portion is formed at one side of the flow path of the rotary shaft, so that oil accumulated in the stepped portion may flow smoothly between the outer surface of the rotary shaft and the inner surface of the shaft support hole.

Hereinafter, a preferred embodiment of the compressor according to the present invention will be described in detail with reference to the accompanying drawings.

Fig. 2 shows the construction of a preferred embodiment of the compressor according to the invention in cross section, and in Fig. 3 the main construction of the embodiment of the invention is shown in an enlarged view.

As shown in these figures, the front housing 110, the rear housing 120, and the front and rear cylinder blocks 130 and 130 'form the skeleton and the appearance of the compressor 100. Of course, the skeleton and appearance of the compressor 100 are formed by the front housing 110 and the rear housing 120, the cylinder block (130, 130 ') may be provided in the interior space of the front and rear housing (110, 120).

These are arranged and coupled in the order of the front housing 110, the front and rear cylinder blocks (130, 130 ') and the rear housing 120, through which the rotary shaft 140 is rotated by an external drive source is installed.

Piston 158 linearly reciprocating in conjunction with the rotation of the rotary shaft 140 is installed in the cylinder bore 135 of the front and rear cylinder blocks (130, 130 '), the discharge of the working fluid compressed in the cylinder bore (135) It is made by the valve unit 160.

The front and rear housings 110 and 120, and the front and rear cylinder blocks 130 and 130 ′ are fastened to each other by a plurality of fixing bolts 170 penetrating them. For this purpose, the front and rear housings 110 and 120 are bolted holes 110 ′ and 120 ′. ) Is formed.

Hereinafter, the components constituting the compressor 100 will be described in more detail. The front housing 110 is formed in a shaft through-hole 112 through which the rotating shaft 140 passes through the center in a substantially disk shape. The shaft hole 112 is formed through the center of the protrusion 113 protruding in the center of one surface of the front housing 110.

The discharge chamber 114 is recessed on the opposite surface on which the protrusion 113 is formed in the front housing 110. The discharge chamber 114 may be formed over a substantially ring-shaped area so as to selectively communicate with each cylinder bore 135 of the front cylinder block 130 and the valve unit 160.

The rear housing 120 is mounted on one surface of the rear cylinder block 130 ′, ie, the opposite surface 132 of the rear cylinder block 130 ′ in close contact with the front cylinder block 130. The discharge chamber 122 is recessed on a surface of the rear housing 120 that faces the rear cylinder block 130 ′.

In the center of the rear housing 120, a rotating shaft chamber 124 corresponding to one end of the rotating shaft 140 is formed. The rotary shaft chamber 124 is formed by partitioning the discharge chamber 122 in the center of the discharge chamber 122.

The front and rear cylinder blocks 130 and 130 ′ are formed to correspond to portions concaved to the surfaces joined to each other to form the swash plate chamber S. The swash plate 142 installed on the rotating shaft 140 is rotatably positioned in the swash plate chamber (S). A suction port (not shown) is formed at a position corresponding to the swash plate chamber S among the outer surfaces of the front and rear cylinder blocks 130 and 130 ′ to transmit a working fluid transferred from the evaporator to the inside of the swash plate chamber S.

Axial support holes 131 are formed in the front and rear cylinder blocks 130 and 130 '. The shaft support hole 131 is a portion into which the rotation shaft 140 is inserted, and has an inner diameter corresponding to the diameter of the rotation shaft 140.

The front and rear cylinder blocks 130 and 130 ′ are formed by passing through a plurality of cylindrical cylinder bores 135 in the direction of forming the mounting hole with the shaft support hole 131 at the center. In this case, the cylinder bore 135 is formed at positions corresponding to the front and rear cylinder blocks 130 and 130 ', respectively.

Suction passages 136 are formed in the front and rear cylinder blocks 130 and 130 '. The suction passage 136 communicates between the cylinder bore 135 and the shaft support hole 131 so that the working fluid is transferred to the cylinder bore 135 through the interior of the rotating shaft 140.

Discharge passages 138 are formed in the front and rear cylinder blocks 130 and 130 ′ so as to communicate with discharge chambers 114 and 122 of the front and rear housings 110 and 120, respectively. The discharge passage 138 serves as a passage for discharging the working fluid compressed in the cylinder bore 135 to the outside.

One end of the rotating shaft 140 passes through the front housing 110, and the other end of the rotating shaft 140 faces the rotating shaft chamber 124 of the rear housing 120. An approximately disk-shaped swash plate 142 is installed to be inclined with respect to the extending direction of the rotating shaft 140. The swash plate 142 is provided to be inclined with respect to the rotation shaft 140, and serves to linearly move the piston 158 during the rotation process.

Next, the assembling hole 144 ′ is drilled through the hub 144 so as to communicate with the inside of the rotating shaft 140, and a plurality of shoes 145 are installed to surround the edge of the swash plate 142. The shoe 145 is configured to move along the surface edge of the swash plate 142.

The flow passage 147 through which the working fluid flows is formed inside the rotating shaft 140. The flow path 147 is formed long in the longitudinal direction of the rotation shaft 140 inside the rotation shaft 140. The flow path 147 is formed to be opened to one end of the rotation shaft 140, and the opened portion is positioned to face the rotation shaft chamber 124 of the rear housing 120.

In order to communicate with the flow path 147, the swash plate chamber S, and the suction passage 136, the inlet 148 and the outlet 148 are respectively opened in the rotation shaft 140 to the outer surface of the rotation shaft 140. ') Is formed. The inlet 148 and the outlet 148 ′ may each be formed in plurality. Reference numeral 149 denotes a shaft sealing part that prevents a gap between the inner surface of the shaft through hole 112 of the front housing 110 and the outer surface of the rotating shaft 140.

At this time, the step 147 ′ is provided on the inner circumferential surface of the flow path 147. The stepped portion 147 ′ is a portion in which the inner diameter of the flow path 147 is formed differently, and is a portion where the oil mixed with the refrigerant stays.

That is, the oil mixed with the refrigerant is moved along the inner circumferential surface of the flow path 147 by the centrifugal force due to the rotation of the rotary shaft 140, when the step is reached the step portion 147 ' It will not flow, but it will be.

The oil accumulated in the stepped portion 147 ′ moves along the edge of the outlet 148 ′ and flows between the outer surface of the rotating shaft 140 and the inner surface of the shaft supporting hole 131 to rotate the shaft 140 and the shaft supporting hole ( Lubricating between 131).

To this end, the stepped portion 147 'is preferably formed at a position corresponding to the outlet 148' of the flow passage 147 in communication with the cylinder bore 135.

Of course, as shown in FIG. 3, the guide groove 147 ″ is formed to be connected to the stepped portion 147 ′, so that oil accumulated in the stepped portion 147 ′ is smoother than the outer surface of the rotary shaft 140. It may be introduced between the inner surface of the shaft support hole 131.

The piston 158 is a linear reciprocating motion in the cylinder bore (135). The piston 158 has a substantially cylindrical shape corresponding to the inside of the cylinder bore 135, and both ends thereof are positioned in the cylinder bores 135 of the front and rear cylinder blocks 130 and 130 ', respectively. That is, both ends of the one piston 158 serves to compress the working fluid in the cylinder bore 135.

The valve unit 160 is used to control the discharge of the working fluid compressed in the cylinder bore 135 to the outside of the cylinder bore 135. The valve unit 160 includes a valve plate 162 installed in close contact with one surface of the front and rear cylinder blocks 130 and 130 ′, and the valve plate 162 is positioned at a position corresponding to each cylinder bore 135. The discharge hole 164 is formed. Discharge leads 166 are used to selectively open and close the discharge holes 164, respectively. The discharge lead 166 may be elastically deformable and may be elastically deformed according to the pressure of the working fluid in the cylinder bore 135 to open the discharge hole 164.

The valve plate 162 is formed in a substantially disk shape, the communication hole 167 is formed in a position corresponding to the discharge passage 138. The communication hole 167 serves to communicate the respective discharge chambers 114 and 122 with the discharge passage 138.

A muffler 168 is formed on outer surfaces of the front and rear cylinder blocks 130 and 130 ′ so as to communicate with the discharge passage 138. The muffler 168 serves to reduce pulsation and noise of the working fluid. The muffler 168 is provided with a discharge port 169 for discharging the working fluid to the outside (condenser) of the compressor (100). Reference numerals 116 and 118 denote oil chambers and communication paths, respectively.

Hereinafter, the operation of the compressor according to the present invention will be described in detail with reference to the drawings.

In the compressor 100 of the present invention, as the rotary shaft 140 is rotated by a driving force transmitted from the outside, the swash plate 142 is rotated together with the rotary shaft 140. Rotation of the swash plate 142 causes the piston 158 to make a straight reciprocating motion inside the cylinder bore 135.

At this time, although not shown, since the state is coupled to the disk of the clutch assembly of the rotary shaft 140, the clutch assembly is rotated by receiving the rotational force of the engine is to rotate the rotary shaft 140 with the disk.

As the rotary shaft 140 rotates, the flow path 147 inside the rotary shaft 140 sequentially communicates with the respective cylinder bores 135 through the outlet 148 ′ and the suction passage 136.

The communication between the flow path 147 and the cylinder bore 135 allows the working fluid delivered from the outside of the compressor 100 to be transferred to the cylinder bore 135. For reference, the working fluid is sucked into the cylinder bore 135 when the piston 158 is located at the bottom dead center of the corresponding cylinder bore 135.

More precisely, the refrigerant is transferred from the swash plate chamber S into the flow path 147 of the rotary shaft 140, and the coolant of the flow path 147 flows back into the cylinder bore 135.

At this time, the oil flowing along the inner circumferential surface of the flow passage 147 by the centrifugal force inside the flow passage 147 reaches the stepped portion 147 ', and the accumulated oil is the outlet 148' of the flow passage 147. Or it is introduced between the outer circumferential surface of the rotary shaft 140 and the inner surface of the shaft support hole 131 along the guide groove 147 ''.

Accordingly, the oil is prevented from being mixed with the refrigerant to be compressed, and lubrication between the outer circumferential surface of the rotary shaft 140 and the inner surface of the shaft support hole 131 may be more smoothly performed.

Continuing the operation of the compressor, when the working fluid is delivered to the cylinder bore 135, the piston 158 of the corresponding cylinder bore 135 moves in the direction of the valve plate 162, the working fluid Compression takes place. When the working fluid is compressed in the cylinder bore 135, the pressure inside the cylinder bore 135 becomes relatively high, the tip of the discharge lead 166 is pushed and elastically deformed, and the discharge port 164 is opened. do.

In this case, the working fluid compressed through the discharge port 164 is transferred to the discharge chambers 114 and 122, and the working fluid delivered to the discharge chambers 114 and 122 is discharged through the communication port 167. Is transmitted to the muffler 168 through the outlet 169 from the muffler 168 toward the condenser.

On the other hand, the compressor 100 is rotated through a very large rotational force transmitted from the engine, both the compressor 100 and the clutch assembly is used in an environment susceptible to external forces due to vibration, such as inside the vehicle.

The scope of the present invention is not limited to the embodiments described above, but is defined by the claims, and various changes and modifications can be made by those skilled in the art within the scope of the claims. It is self evident.

.

1 is a cross-sectional view showing the configuration of a compressor according to the prior art.

2 is a cross-sectional view showing a configuration of a preferred embodiment of the configuration of the compressor according to the present invention.

Figure 3 is an enlarged view showing the main portion of the embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100: compressor 110: front housing

116: oil chamber 118: communication path

120: rear housing 122: discharge chamber

124: rotating shaft chamber 130: front cylinder block

130 ': rear cylinder block 131: shaft support hole

135: cylinder bore 140: rotation axis

142: Saphan 147: Euro

147 ': step 147' ': guide groove

160: valve unit 164: discharge hole

S: tribunal

Claims (3)

Front and rear housings (110, 120) to form the outer appearance of at least both ends of the compressor (100), Located between the front and rear housings (110, 120), and formed around the center of the plurality of cylinder bores (135) penetrating, the front and rear cylinder blocks (130, 130 ') having a swash plate chamber (S) therein, The swash plate 142 rotatably provided in the axial support hole 131 formed in the front and rear cylinder blocks 130 and 130 ′ and installed in the swash plate chamber S is rotatably sucked into the compressor 100. A rotating shaft 140 in which a flow path 147 for transmitting a working fluid to the cylinder bore 135 is formed, and In the compressor including a plurality of pistons 158 linearly reciprocating in the cylinder bore 135 in accordance with the rotational movement of the swash plate 142, A stepped portion 147 'is provided at a position corresponding to the outlet 148' of the flow passage 147 in communication with the cylinder bore 135 of the inner circumferential surface of the flow passage 147, The oil flowing along the inner circumferential surface of the flow path (147) is accumulated in the step portion (147 '), characterized in that the flow between the outer surface of the rotary shaft 140 and the inner surface of the shaft support hole (131). The compressor as set forth in claim 1, wherein the stepped portion (147 ') is formed continuously around the inner circumferential surface of the flow path (147). The guide shaft 147 ″ of claim 1, wherein the rotary shaft 140 is connected to one end of the stepped part 147 ′ and connects the flow path 147 and an outer surface of the rotary shaft 140. Compressor characterized in that.

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