KR102711440B1 - Flow passage structure of slant plate type compressor - Google Patents

Abstract

The present invention comprises a body part formed by a front housing disposed at the front and a rear housing disposed at the rear to form the exterior of a swash plate type compressor; a cylinder part formed by a front cylinder block and a rear cylinder block, the front cylinder block being positioned between the front housing and the rear housing, the front cylinder block having an axial support hole formed through the center thereof and having a cylinder bore and a swash plate room formed therein; a rotary shaft rotatably installed through the front cylinder block and the rear cylinder block, the rotary shaft having a passage formed therein to transmit a working fluid to the cylinder bore; a hub installed in a form in which the rotary shaft is inserted into the center thereof and is rotationally driven by the rotation of the rotary shaft; a swash plate installed on the central outer surface of the hub at an angle with respect to the longitudinal direction of the rotary shaft and rotationally driven together with the hub; a plurality of pistons connected to the swash plate by shoes and performing linear reciprocating motions within the cylinder bore according to the rotational driving of the swash plate; A flow path structure of a swash plate compressor including a bearing installed on the outer surface of the rotary shaft between both sides of the hub and the inner surface of the swash plate room and the cylinder bore to allow the rotary shaft to rotate smoothly, wherein the flow path comprises a main flow path formed to extend at a predetermined length along the longitudinal direction of the rotary shaft to the inner center of the rotary shaft, and a plurality of auxiliary flow paths formed to penetrate along the diametric direction of the rotary shaft so as to allow a working fluid to flow toward the bearings installed on the outer surface of the rotary shaft, thereby forming the main flow path and the auxiliary flow paths inside the rotary shaft of the swash plate compressor so as to allow the working fluid to flow toward the bearings that come into contact with the peripheral portion of the rotary shaft to promote a lubrication action, and by allowing auxiliary suction of the working fluid to be achieved using the main flow path and the auxiliary flow paths, the efficiency of the compressor can be increased.

Description

{FLOW PASSAGE STRUCTURE OF SLANT PLATE TYPE COMPRESSOR}

The present invention relates to a flow path structure of a swash plate compressor, and more specifically, to a flow path structure of a swash plate compressor in which a main flow path and an auxiliary flow path are formed inside a rotating shaft of the swash plate compressor so as to allow a working fluid to flow toward a bearing that comes into contact with the peripheral portion of the rotating shaft to promote lubrication, and so as to enable auxiliary suction of the working fluid using the main flow path and the auxiliary flow path, thereby increasing the efficiency of the compressor.

A compressor, typically used in an automobile's air conditioning system, sucks in the working fluid that has completed evaporation from the evaporator, turns it into a high-temperature, high-pressure state that is easy to liquefy, and delivers it to the condenser.

In this type of compressor, there are two types: a reciprocating type that compresses the working fluid by reciprocating motion and a rotary type that compresses by rotating motion. The reciprocating type includes a crank type that transmits the driving force of the driving source by using a crank shaft, a swash plate type that transmits it by a rotating shaft with a swash plate installed, and a wobble plate type that uses a wobble plate. The rotary type includes a vane rotary type that uses a rotating rotary shaft and vanes, and a scroll type that uses a rotating scroll and a fixed scroll.

Figure 1 is a longitudinal cross-sectional view showing the structure of a conventional swash plate compressor.

As shown in Fig. 1, the conventional swash plate type compressor has a frame and exterior of the compressor (1) formed by a front housing (10), a rear housing (20), and front and rear cylinder blocks (30, 30').

A rotary shaft (40) that is rotated by an external driving source is installed through the center of the front housing (10) and the front and rear cylinder blocks (30, 30'). The front housing (10) and the rear housing (20) are installed at each of the two ends of the front and rear cylinder blocks (30, 30') that are joined to each other.

And, a piston (50) that performs a linear reciprocating motion by the rotation of the rotary shaft (40) is installed in the cylinder bore (34) of the front and rear cylinder blocks (30, 30'), and a valve unit (60) that controls the discharge of the compressed working fluid from the cylinder bore (34) 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').

Hereinafter, the detailed configuration of each component described above will be described. First, the front housing (10) is formed in a substantially circular shape. Then, a discharge chamber (14) is formed to be recessed on a surface of the front housing (10) facing the front cylinder block (30). The discharge chamber (14) is formed over an area having a substantially ring shape, and is selectively connected to each cylinder bore (34) of the front cylinder block (30) through the valve unit (60).

Here, the valve unit (60) is not illustrated in detail in the drawing, but includes a valve plate having a refrigerant suction hole and a refrigerant discharge hole formed therein, and a suction lead and a discharge lead installed front and rearwardly with the valve plate interposed therebetween.

In addition, the rear housing (20) is mounted on one side of the rear cylinder block (30'), and a discharge chamber (22) is formed to be recessed on the side of the rear housing (20) that faces the rear cylinder block (30'). The discharge chamber (22) is formed to be selectively connected to cylinder bores (34) formed in the rear cylinder block (30') through a valve unit (60).

The front and rear cylinder blocks (30, 30') have a recessed portion formed on the surface where they are joined to form a swash plate room (31). A swash plate (42) installed on a rotating shaft (40) is positioned rotatably in the swash plate room (31). In addition, a shaft support hole (32) is formed through the front and rear cylinder blocks (30, 30'). A rotating shaft (40) passes through the shaft support hole (32), and the inner diameter of the shaft support hole (32) is designed so that the outer surface of the rotating shaft (40) can be in close contact with it.

In addition, a plurality of cylinder bores (34) having a cylindrical shape are formed in the front and rear cylinder blocks (30, 30') with the shaft support hole (32) at the center and in the direction of forming the shaft support hole (32). Of course, the cylinder bores (34) are formed at corresponding positions in the front and rear cylinder blocks (30, 30'), respectively. The cylinder bores (34) and the shaft support hole (32) are each connected to each other through an intake passage (36), and the intake passage (36) allows the working fluid transmitted through the interior of the rotating shaft (40) to be transmitted to the cylinder bores (34), respectively.

The rotary shaft (40) has one end penetrating the front housing (10) and the middle end penetrating the front and rear cylinder blocks (30, 30').

And, on the rotation shaft (40), a swash plate (42) having a roughly circular shape is installed at an angle with respect to the extension direction of the rotation shaft (40). A hub (44) is provided in a cylindrical shape at the center of the swash plate (42), and the rotation shaft (40) is installed so that it penetrates the hub (44). A communication hole (44') is drilled through the hub (44) to communicate with the inside of the rotation shaft (40), and a plurality of shoes (46) are installed around the edge of the swash plate (42). The shoes (46) are configured to move along the edge of the swash plate (42).

Meanwhile, a path (47) through which a working fluid flows is formed inside the rotating shaft (40). The path (47) is formed lengthwise in the longitudinal direction of the rotating shaft (40) inside the rotating shaft (40). An inlet (48) and an outlet (48') are formed on the outer surface of the rotating shaft (40).

The inlet (48) is formed to communicate with the swash plate room (31) and the duct (47), and the outlet (48') is formed at a position that can communicate with the intake passage (36) of the front and rear cylinder blocks (30, 30'). The position of the outlet (48') must be formed according to the compression order of the working fluid that proceeds in each cylinder bore (34).

In addition, the piston (50) performs a linear reciprocating motion inside the cylinder bore (34). The piston (50) has a roughly cylindrical shape corresponding to the inside of the cylinder bore (34), and both ends are positioned in the cylinder bore (34) of the front and rear cylinder blocks (30, 30'), respectively. That is, both ends of one piston (50) serve to compress the working fluid inside the cylinder bore (34). The piston (50) is connected to the shoe (46) at its middle portion, so that it performs a linear reciprocating motion according to the rotation of the swash plate (42).

In addition, a muffler (68) is formed in the front and rear cylinder blocks (30, 30') to communicate with the discharge chamber (14, 22). The muffler (68) serves to reduce pulsation and noise of the working fluid.

However, in these conventional swash plate type compressors, since the suction operation of the working fluid is performed only through the flow path (47) formed on the rotating shaft (40), there is a problem in that if the suction amount of the working fluid is not sufficient, the efficiency of the compressor is bound to decrease.

In addition, since there is no separate configuration that can make the lubrication of the bearing supporting the outer surface of the rotary shaft (40) more smooth, there is a problem that the efficiency of the compressor may be reduced due to increased resistance to the rotation of the rotary shaft (40) when used repeatedly for a long time.

In consideration of the above points, the purpose of the present invention is to provide a flow path structure of a swash plate compressor in which a main flow path and an auxiliary flow path are formed inside a rotating shaft so that a working fluid can flow toward a bearing that comes into contact with the peripheral part of the rotating shaft to promote lubrication, and the efficiency of the compressor can be increased by allowing auxiliary suction of the working fluid using the main flow path and the auxiliary flow path.

In order to achieve the above object of the present invention, a flow path structure of a swash plate compressor comprises: a body part formed by a front housing positioned at the front and a rear housing positioned at the rear to form an exterior appearance of the swash plate compressor; a cylinder part formed by a front cylinder block and a rear cylinder block, the front cylinder block being positioned between the front housing and the rear housing, the front cylinder block having an axial support hole formed through the center thereof, and having a cylinder bore and a swash plate room formed therein; a rotating shaft rotatably installed through the front cylinder block and the rear cylinder block, the rotating shaft forming a flow path for transmitting a working fluid to the cylinder bore; a hub installed in a form in which the rotating shaft is inserted into the center thereof and is rotationally driven by the rotation of the rotating shaft; a swash plate installed on the central outer surface of the hub at an angle with respect to the longitudinal direction of the rotating shaft and rotationally driven together with the hub; a plurality of pistons connected to the swash plate by shoes and performing linear reciprocating motions within the cylinder bore according to the rotational driving of the swash plate; A flow path structure of a swash plate compressor including a bearing installed on the outer surface of the rotary shaft between both sides of the hub and the inner surface of the swash plate room and the cylinder bore to allow the rotary shaft to rotate smoothly, wherein the flow path comprises a main flow path formed to extend to a certain length in the inner center of the rotary shaft along the longitudinal direction of the rotary shaft, and a plurality of auxiliary flow paths formed to penetrate along the diametric direction of the rotary shaft so as to allow a working fluid to flow toward the bearings installed on the outer surface of the rotary shaft while communicating with the main flow path.

Here, the diameter of the main channel can be formed to be relatively larger than the diameter of the auxiliary channel.

Additionally, the diameter of the auxiliary passage can be formed to have the same length as the width of the cloud member installed in the bearing.

Additionally, the auxiliary path can be formed to penetrate in a parallel direction along the diameter direction of the rotation axis.

In addition, the main channel may be formed to penetrate only from the rear end of the rotation shaft to the position of the bearing installed relatively forward of the outer surface of the rotation shaft.

As described above, the flow path structure of the swash plate type compressor according to the present invention forms a main flow path and an auxiliary flow path inside the rotating shaft, thereby allowing the working fluid to flow toward the bearing side that comes into contact with the peripheral part of the rotating shaft, thereby having the effect of promoting lubrication.

In addition, there is an effect of further improving the efficiency of the compressor by enabling auxiliary suction of the working fluid using the main and auxiliary channels formed on the rotating shaft.

Figure 1 is a cross-sectional view showing the structure of a conventional swash plate compressor.
FIG. 2 is a perspective view illustrating the structure of a swash plate compressor according to one embodiment of the present invention.
FIG. 3 is a longitudinal cross-sectional view illustrating the flow path structure of a swash plate compressor according to one embodiment of the present invention.

Hereinafter, the flow path structure of a swash plate compressor according to one embodiment of the present invention will be described in more detail with reference to the attached drawings.

FIG. 2 is a perspective view illustrating the structure of a swash plate compressor according to one embodiment of the present invention, and FIG. 3 is a longitudinal cross-sectional view illustrating the flow path structure of a swash plate compressor according to one embodiment of the present invention.

As illustrated in these drawings, the flow path structure of the swash plate compressor according to one embodiment of the present invention comprises: a body part (100) formed by a front housing (110) positioned at the front and a rear housing (120) positioned at the rear to form the exterior of the swash plate compressor; a cylinder part (200) formed by a front cylinder block (201) positioned between the front housing (110) and the rear housing (120) and having a shaft support hole (210) formed through the center thereof and having a cylinder bore (220) and a swash plate chamber (230) inside, and a rear cylinder block (202); a rotating shaft (300) rotatably installed through the front cylinder block (201) and the rear cylinder block (202) and having a flow path (310) formed therein to transmit a working fluid to the cylinder bore (220); A hub (400) installed in a form in which the rotation shaft (300) is inserted into the center and is rotationally driven by the rotation of the rotation shaft (300); a swash plate (500) installed on the central outer surface of the hub (400) at an angle with respect to the longitudinal direction of the rotation shaft (300) and rotationally driven together with the hub (400); a plurality of pistons (600) connected to the swash plate (500) by a shoe (610) and performing linear reciprocating motion inside the cylinder bore (220) according to the rotational driving of the swash plate (500); A flow path structure of a swash plate compressor including a bearing (700) installed on the outer surface of the rotary shaft (300) between both sides of the hub (400) and the inner surface of the swash plate chamber (230) and the cylinder bore (220) to allow the rotary shaft (300) to rotate smoothly, wherein the flow path (310) comprises a main flow path (311) formed to extend to a certain length in the inner center of the rotary shaft (300) along the longitudinal direction of the rotary shaft (300), and a plurality of auxiliary flow paths (312) formed to penetrate along the diametric direction of the rotary shaft (300) so as to allow a working fluid to flow toward the bearing (700) installed on the outer surface of the rotary shaft (300) and communicate with the main flow path (311).

The body part (100) is composed of a front housing (110) installed at the front of the swash plate type compressor and a rear housing (120) installed at the rear. The front housing (110) and the rear housing (120) are respectively coupled to the front and rear of the cylinder part (200) to shield the front and rear of the cylinder part (200) from the outside.

In addition, a suction hole (111) and a discharge hole (112) are formed in the front housing (110) so that the working fluid is sucked into the cylinder bore (220) through the suction hole (111), and after compression is completed, it is discharged to the outside through the discharge hole (112) and delivered to the condenser.

The cylinder part (200) is composed of a front cylinder block (201) positioned at the front and a rear cylinder block (202) positioned at the rear. A shaft support hole (210) is provided through the center of the cylinder part (200) to allow a rotational shaft (300) to be rotatably installed, and a cylinder bore (220) and a swash plate chamber (230) are formed inside.

The rotary shaft (300) is rotatably installed in the shaft support hole (210) formed in the cylinder part (200) and rotates the swash plate (500) provided on the outer surface by the rotational drive, thereby causing the piston (600) connected to the swash plate (500) to reciprocate and compress the working fluid.

A path (310) is formed on the rotation shaft (300). The path (310) is formed by a main path (311) that extends to a certain length in the center of the inside of the rotation shaft (300) along the longitudinal direction of the rotation shaft (300), and a plurality of auxiliary paths (312) that are formed through the diametric direction of the rotation shaft (300) so as to allow the working fluid to flow toward a bearing (700) installed on the outer surface of the rotation shaft (300) and communicate with the main path (311).

The main channel (311) is formed to have a constant length along the longitudinal direction at the inner center of the rotating shaft (300), so that the working fluid is supplied to the inside through the end of the main channel (311) and flows to the outside of the rotating shaft (300) through the auxiliary channel (312), thereby causing auxiliary suction toward the cylinder bore (220) formed in the cylinder portion (200).

In addition, there is an effect of promoting lubrication of the bearing (700) by allowing the working fluid to flow toward the bearing (700) through the auxiliary channel (312) formed along the diametric direction of the rotation shaft (300) while communicating with the main channel (311).

The diameter of the main channel (311) is formed to be relatively larger than the diameter of the auxiliary channel (312), and it is preferable that the diameter of the auxiliary channel (312) be formed to have the same length as the width of the cloud member (710) installed in the bearing (700).

The diameter of the auxiliary passage (312) is formed to have the same length as the width of the cloud member (710) installed in the bearing (700), so that the working fluid can pass through the space between the cloud members (710) and be sucked toward the cylinder bore (220).

In addition, the auxiliary flow path (312) is formed to penetrate in a parallel direction along the diametric direction of the rotation shaft (300) so that when the working fluid flows toward the bearing (700), it is supplied to the same position of the bearing (700), thereby ensuring that the bearings (700) installed at the front and rear of the rotation shaft (300) are in the same state, thereby effectively ensuring that the front and rear of the rotation shaft (300) rotate in the same state when the rotation shaft (300) rotates.

In addition, the main flow path (311) is formed so that it penetrates only from the rear end of the rotation shaft (300) to the position of the bearing (700) installed relatively forward on the outer surface of the rotation shaft (300), thereby allowing the rigidity of the rotation shaft (300) itself to be maintained at a certain level or higher even if the flow path is formed inside the rotation shaft (300).

The hub (400) is a member that is installed in a form in which a rotation shaft (300) is inserted into the center and is rotated together with the rotation shaft (300) by the rotation of the rotation shaft (300), and the swash plate (500) is installed on the central outer surface of the hub (400) at an angle with respect to the longitudinal direction of the rotation shaft (300) so as to rotate together with the hub (400) while allowing the piston (600) connected to the swash plate (500) to reciprocate.

The piston (600) is connected to the swash plate (500) by the shoe (610) and performs a linear reciprocating motion by the rotation of the swash plate (500) to compress the working fluid sucked into the cylinder bore (220).

A bearing (700) is installed on the outer surface of the rotation shaft (300) between both sides of the hub (400) and the inner surface of the swash plate chamber (230) and the cylinder bore (220) to allow the rotation shaft (300) to rotate smoothly. To this end, a plurality of rolling members (710) are arranged at a predetermined interval along the circumferential direction of the bearing (700), and the rolling members (710) are maintained in a state of linear contact with the circumferential surface of the rotation shaft (300).

The process of operating the compressor by the flow path structure of the swash plate type compressor according to one embodiment of the present invention having the configuration described above is explained as follows.

The swash plate type compressor according to the present invention selectively transmits the rotational force of a pulley that receives the driving force of an engine to the rotational shaft (300) of the swash plate type compressor through a disc and hub assembly by the interlocking action of an electromagnetic clutch, thereby causing the rotational shaft (300) to rotate.

And, according to this rotation, the piston (600) is made to reciprocate linearly in the forward and backward direction by the swash plate (500) that rotates in an inclined state together with the rotation axis (300).

During the forward and backward linear reciprocating motion of the piston (600), during the suction stroke of the piston (600), the suction lead opens the refrigerant suction hole, while the discharge lead closes the refrigerant discharge hole, thereby allowing the refrigerant to be sucked into the cylinder bore (220) of the cylinder portion (200).

And, during the compression stroke of the piston (600), the discharge lead opens the refrigerant discharge hole while the suction lead closes the refrigerant suction hole, so that the refrigerant inside the cylinder bore (220) is compressed and discharged toward the condenser.

In this process, the working fluid passing through the bearing (700) is auxiliary-sucked toward the cylinder bore (220) through the main channel (310) formed along the longitudinal direction of the rotating shaft (300) in the center of the rotating shaft (300) and the auxiliary channel (310) formed along the diametric direction of the rotating shaft (300) and connected to the main channel (310), thereby ensuring that the amount of working fluid supplied toward the cylinder bore (220) is sufficient, thereby maximizing the efficiency of the compressor.

In addition, as the working fluid passes through the bearing (700) through the auxiliary path (310) and comes into contact with the outer surface of the rolling member (710) of the bearing (700), the lubrication effect is made more smoothly, thereby minimizing resistance during rotation of the rotating shaft (300) and increasing the efficiency of the compressor.

According to one embodiment of the present invention, the flow path structure of a swash plate compressor having the configuration described above forms a main flow path and an auxiliary flow path inside a rotating shaft so that a working fluid can flow toward a bearing that comes into contact with the peripheral portion of the rotating shaft to promote lubrication, and by using the main flow path and the auxiliary flow path, auxiliary suction of the working fluid can be achieved, thereby further increasing the efficiency of the compressor.

The above is only a description of some of the preferred embodiments that can be implemented by the present invention, and therefore, as is well known, the scope of the present invention should not be construed as being limited to the above embodiments, and the technical ideas of the present invention described above and the technical ideas underlying them are all included in the scope of the present invention.

100 : Body 110 : Front Housing
120 : Rear housing 200 : Cylinder part
201: Front cylinder block 202: Rear cylinder block
210: Shaft support 220: Cylinder bore
230 : Sappansil 300 : Rotation axis
310 : Euro 311 : Main Euro
312 : Auxiliary Euro 400 : Hub
500 : Sappan 600 : Piston
610 : Shoe 700 : Bearing

Claims (5)

A body part (100) composed of a front housing (110) positioned at the front to form the exterior of a swash plate compressor and a rear housing (120) positioned at the rear;
A cylinder part (200) comprising a front cylinder block (201) positioned between the front housing (110) and the rear housing (120) and having an axle support hole (210) formed through the center and having a cylinder bore (220) and a swash plate room (230) inside, and a rear cylinder block (202);
A rotating shaft (300) that is rotatably installed through the front cylinder block (201) and the rear cylinder block (202) and has a passage (310) formed therein to transmit working fluid to the cylinder bore (220);
A hub (400) installed in a form in which the rotation shaft (300) is inserted in the center and is driven to rotate by the rotation of the rotation shaft (300);
A swash plate (500) installed at an angle with respect to the longitudinal direction of the rotation shaft (300) on the central outer surface of the hub (400) and rotating together with the hub (400);
A plurality of pistons (600) that are connected by the above-mentioned swash plate (500) and shoe (610) and perform linear reciprocating motion inside the cylinder bore (220) according to the rotational drive of the above-mentioned swash plate (500);
A flow path structure of a swash plate compressor including a pair of bearings (700) installed respectively on the front and rear sides of the outer surface of the rotary shaft (300) between the two sides of the hub (400) and the inner surface of the swash plate chamber (230) and the cylinder bore (220) so that the rotary shaft (300) rotates smoothly.
The above-mentioned path (310) is composed of a main path (311) formed to extend to a certain length in the inner center of the rotational shaft (300) along the longitudinal direction of the rotational shaft (300), and a plurality of auxiliary paths (312) formed to penetrate along the diametric direction of the rotational shaft (300) so as to communicate with the main path (311) and allow the working fluid to flow toward the bearing (700) installed on the outer surface of the rotational shaft (300).
The above auxiliary flow path (312) is formed to penetrate in the same direction along the diametric direction of the rotation shaft (300) so that the working fluid is supplied to the same position of the pair of bearings (700) installed in front and rear of the rotation shaft (300), so that the pair of bearings (700) rotate the rotation shaft (300) in the same state.
The diameter of the above main channel (311) is formed relatively larger than the diameter of the above auxiliary channel (312),
The diameter of the auxiliary channel (312) is formed to have the same length as the width of the cloud member (710) so as to allow the working fluid introduced into the auxiliary channel (312) to pass through the space between the cloud members (710) installed in the bearing (700) and be sucked toward the cylinder bore (220) to enable auxiliary suction of the working fluid, thereby improving the efficiency of the swash plate type compressor.
The above main path (311) is a path structure of a swash plate type compressor, characterized in that it penetrates only from the rear end of the above rotary shaft (300) to the position of the bearing (700) installed relatively forward on the outer surface of the above rotary shaft (300). delete delete delete delete

Images