KR101348899B1 - Compressor - Google Patents

Abstract

The present invention relates to a compressor, comprising a rotary shaft 140 having a swash plate 142 to drive a piston 150 linearly reciprocating in a cylinder bore 134 formed in the front and rear cylinder blocks (130, 130 '). use. The piston 150 is formed with anti-rolling ribs 155 and 155 'which face each other to protrude to the outer surface in a shape corresponding to the outer circumferential surface of the swash plate 142. In addition, oil holes 157 and 157 'are formed through the rolling prevention ribs 155 and 155' to allow oil to flow therethrough. According to the present invention, the oil flows smoothly between the parts requiring the oil through the oil hole of the anti-rolling rib, that is, between the swash plate and the shoe, the outer diameter of the swash plate and the piston, and the cylinder bore and the piston. There is an advantage that the contact portion is rubbed to prevent wear phenomenon.

Compressor, swash plate, rotating shaft, piston, rolling prevention rib, oil ball

Description

Compressor

The present invention relates to a compressor, and more particularly to a compressor in which the working fluid is delivered to the cylinder bore and the working fluid is compressed in the cylinder bore by a piston driven by a swash plate installed on the rotating shaft.

Generally, a compressor used in an automotive air conditioning system sucks a vaporized working fluid from an evaporator and transfers it to a condenser in a high-temperature and high-pressure state which is easy to be liquefied.

In such a compressor, there is actually a reciprocating type in which compression is performed while reciprocating movement of the working fluid is compressed, and a rotary type in which compression is performed while rotating.

In the reciprocating type, there is a crank type in which the driving force of the driving source is transmitted using a crankshaft, a swash plate type in which the swash plate is transmitted, and a wobble plate type in which a wobble plate is used. Rotary types include rotary rotary axes with vane rotary vanes, scrolling with rotary scrolls and fixed scrolls.

FIG. 1 is a sectional view showing the configuration of a general compressor, and FIG. 2 is a plan view showing the configuration of a piston constituting a general compressor. Referring to the drawings, a schematic configuration of a swash plate compressor will be described. The front housing 10 and the rear housing 20 form a skeleton and an appearance of the compressor 1. The front housing 10 and the rear housing 20 are provided with front and rear cylinder blocks 30 and 30 ', respectively. Through the center of the front housing 10, the front and rear cylinder blocks (30, 30 ') is provided with a rotating shaft 40 which is rotated by an external drive source. The front housing 10 and the rear housing 20 are installed at both ends of the front and rear cylinder blocks 30, 30 'coupled to each other.

The piston 50, which linearly reciprocates by the rotation of the rotary shaft 40, is installed in the cylinder bores 34 of the front and rear cylinder blocks 30 and 30 ', and is compressed in the cylinder bores 34. A valve unit 60 for controlling the discharge of the fluid 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 (B), the fixing bolt (B) is the front housing (10), Passes through the rear housing 20, the front and rear cylinder blocks (30, 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 is formed in a substantially circular plate shape with a shaft hole 12 through which the rotating shaft 40 passes. The shaft hole 12 penetrates the center of the boss portion 13 protruding from the center of one surface of the front housing 10. The suction chamber 14 and the discharge chamber 15 are recessed on the opposite surface on which the boss portion 13 of the front housing 10 is formed. The suction chamber 14 and the discharge chamber 15 are formed over a substantially ring-shaped area, and selectively through each cylinder bore 34 and the valve unit 60 of the front cylinder block 30. Connected.

The rear housing 20 is mounted on one surface of the rear cylinder block 30 '. The suction chamber 21 and the discharge chamber 22 are recessed on the surface of the rear housing 20 facing the rear cylinder block 30 '. The suction chamber 21 and the discharge chamber 22 are formed to be selectively connected to the cylinder bores 34 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 a 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. The inner diameter of the shaft support hole 32 is designed to be in close contact with the outer surface of the rotary shaft 40.

A plurality of cylindrical cylinder bores 34 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 34 are formed at positions corresponding to the front and rear cylinder blocks 30 and 30 ', respectively. A plurality of suction passages 37 are formed in the front and rear cylinder blocks 30 and 30 'to allow the working fluid supplied to the swash plate chamber 31 to flow into the respective suction chambers 14 and 21. . Connection paths 38 are formed in the front and rear cylinder blocks 30 and 30 ′ so as to be connected to the discharge chambers 15 and 22 of the front and rear housings 10 and 20. The connection passage 38 serves as a passage for discharging the working fluid compressed in the cylinder bore 34 to the outside.

The rotary shaft 40 has one end penetrating the front housing 10 and an intermediate part penetrating 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. A plurality of shoes 46 surrounding the edge of the swash plate 42 is installed. The shoe 46 is configured to move along the edge of the swash plate 42.

The piston 50 linearly reciprocates in the cylinder bore 34. The piston 50 has a substantially cylindrical shape corresponding to the inside of the cylinder bore 34, and both ends thereof are positioned at the cylinder bores 34 of the front and rear cylinder blocks 30 and 30 ', respectively. That is, head portions 52 and 52 'located at both ends of one piston 50 serve to compress the working fluid in the cylinder bore 34. The piston 50 is formed with a bridge portion 53 for connecting the head portion 52, 52 'to each other. Shoe seating portion 54 is formed in the middle portion of the bridge portion 53 so that the shoe 46 can be inserted. The piston 50 is linearly reciprocated along the rotation of the swash plate 42 by coupling the shoe 46 to both sides of the shoe seating part 54.

A pair of anti-rolling ribs 55 and 55 ′ are formed at both sides of the bridge portion 53. The rolling prevention ribs 55 and 55 ′ protrude from the outer surface of the piston 50. Surfaces of the anti-rolling ribs 55 and 55 ′ that face each other are formed in a shape corresponding to the outer circumferential surface of the swash plate 42. The rolling prevention ribs 55 and 55 'are for preventing the piston 50 from rolling. That is, since the swash plate 42 is inclined to rotate in a state coupled to the piston 50, the piston 50 receives the force in the longitudinal direction and the radial force at the same time. Here, the force in the longitudinal direction is a force for performing the compression operation of the working fluid, the radial force is to roll the piston (50). At this time, the outer circumferential surface of the swash plate 42 comes into contact with the inner surfaces of the rolling prevention ribs 55 and 55 'by the radial force, so that the rotation of the piston 50 is regulated, so that the rolling phenomenon of the piston 50 may occur. This is to be avoided.

The valve unit 60 is used to control the discharge of the working fluid compressed in the cylinder bore 34 to the outside of the cylinder bore 34. 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 each of the suction chambers 14 and 21 is provided in the valve plate 62. ) And a suction hole 63 communicating with the cylinder bore 34, and discharge holes 64 communicating with the respective discharge chambers 15 and 22 and the cylinder bore 34.

In addition, a suction lead (not shown) and a discharge lead (not shown) are used to selectively open and close the suction hole 63 and the discharge hole 64, respectively. The suction lead and the discharge lead are elastically deformable materials and are elastically deformed according to the pressure of the working fluid in the cylinder bore 34 to open and close the suction hole 63 and the discharge hole 64.

Mufflers 70 are formed on outer surfaces of the front and rear cylinder blocks 30 and 30 '. The muffler 70 serves to reduce pulsation and noise of the working fluid. The muffler 70 has a suction port 71 for sucking the working fluid supplied from the outside of the compressor 1 (evaporator) and a discharge port 72 for discharging the working fluid to the outside of the compressor 1 (condenser). Formed.

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

The rolling prevention ribs 55 and 55 'are formed to protrude on the outer surface of the piston 50, and are blocked by the rolling prevention ribs 55 and 55' when the piston 50 is linearly reciprocated. The flow of oil around the piston 50 is obstructed. In this case, oil is smoothly formed between the portion requiring oil, that is, the swash plate 42 and the shoe 46, the swash plate 42 and the piston 50, and the cylinder bore 34 and the piston 50. Since they are not supplied, friction occurs between them and wear occurs.

In addition, since the rolling prevention ribs 55 and 55 'are formed at both sides of the piston 50 to increase the weight of the piston 50, there is a problem that more power is required to drive the piston 50. .

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, and to provide a compressor having a smooth flow of oil around the piston.

Another object of the present invention is to provide a compressor in which the weight of the piston is minimized.

According to a feature of the present invention for achieving the object as described above, the present invention comprises a front and rear housing to form an outer appearance of at least both ends of the compressor; Front and rear cylinder blocks positioned between the front and rear housings and having a plurality of cylinder bores formed around a shaft support hole passing through a center thereof; A rotating shaft rotatably installed through the front and rear cylinder blocks; A swash plate which is installed to be inclined to the rotating shaft and integrally rotates and is located in the swash plate chamber; And a rolling prevention rib connected to the outer circumference of the swash plate and linearly reciprocating in the cylinder bore according to the rotational movement of the swash plate, the surfaces facing each other protruding to the outer surface in a shape corresponding to the outer circumferential surface of the swash plate. In the compressor provided with a plurality of pistons formed, the rolling ball is formed through the oil hole so that the oil flows.

The oil ball is formed extending in the longitudinal direction of the piston.

In the present invention, an oil hole is formed in the anti-rolling rib. Therefore, the oil flows smoothly between the oil-removing portion, that is, the swash plate and the shoe, the outer diameter and the piston of the swash plate, and the cylinder bore and the piston through the oil hole of the roll preventing rib. Therefore, the wear and tear of the parts in contact with each other is prevented, thereby improving the durability of the product.

In addition, since the amount of the base metal is reduced as much as the oil hole is formed, the weight of the piston is relatively reduced. Therefore, the piston can be driven even with a relatively small force, thereby improving the efficiency of the compressor.

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

Fig. 3 shows the construction of a preferred embodiment of the compressor according to the invention in cross section and Fig. 4 shows the construction of a piston constituting an embodiment of the invention in plan view.

As shown in these figures, the front housing 110 and the rear housing 120 form the skeleton and appearance of the compressor 100. The front housing 110 and the rear housing 120 are provided with front and rear cylinder blocks 130 and 130 ', respectively. 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 do. For reference, the front and rear housing blocks 110 and 120 surround the front and rear cylinder blocks 130 and 130 ', that is, the front and rear cylinder blocks 130 and 130' in an inner space formed by the front and rear housings 110 and 120. It may be configured to be located.

 The piston 150 linearly reciprocating by the rotation of the rotary shaft 140 is installed in the cylinder bore 134 of the front and rear cylinder blocks (130, 130 '), and the compressed working fluid of the cylinder bore (134) The valve unit 160 for controlling the discharge is installed between the front housing 110 and the front cylinder block 130 and between the rear housing 120 and the rear cylinder block 130 '. The front housing 110, the rear housing 120, the front and rear cylinder blocks (130, 130 ') are fastened to each other by a plurality of fixing bolts (B), the fixing bolt (B) is the front housing (110), Passes through the rear housing 120, the front and rear cylinder blocks (130, 130 '). To this end, the bolt holes 110 'and 120' are formed in the front housing 110 and the rear housing 130, respectively.

Next, the components constituting the compressor 100 will be described in more detail. First, the front housing 110 has a cylindrical 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 boss portion 113 protruding in the center of one surface of the front housing 110. The suction chamber 114 and the discharge chamber 115 are recessed on the opposite surface on which the boss portion 113 is formed in the front housing 110. The suction chamber 114 and the discharge chamber 115 are formed over an approximately ring-shaped area so that the respective cylinder bores 134 and the valve unit 160 of the front cylinder block 130 can be selectively connected. Can be.

The rear housing 120 is mounted on one surface of the rear cylinder block 130 ′, that is, on the opposite surface of the rear cylinder block 130 ′ in close contact with the front cylinder block 130. The suction chamber 121 and the discharge chamber 122 are recessed on the surface of the rear housing 120 facing the rear cylinder block 130 '. The suction chamber 121 and the discharge chamber 122 are formed to have a substantially ring-shaped area and selectively through the cylinder bores 134 and the valve unit 160 formed in the rear cylinder block 130 '. Connected.

The front and rear cylinder blocks (130, 130 ') are formed in the recessed portion is coupled to each other, thereby forming a swash plate chamber 131 by combining with each other. In the swash plate chamber 131, a swash plate 142 installed on the rotation shaft 140 is rotatably positioned. The shaft support hole 132 is formed through the front and rear cylinder blocks 130 and 130 '. The rotation shaft 140 penetrates the shaft support hole 132. The inner diameter of the shaft support hole 132 is designed to be in close contact with the outer surface of the rotary shaft 140.

A plurality of cylindrical cylinder bores 134 are formed in the front and rear cylinder blocks 130 and 130 'in the direction of forming the shaft support hole 132 with the shaft support hole 132 as the center. Of course, the cylinder bore 134 is formed in the front and rear cylinder blocks (130, 130 ') are respectively corresponding positions.

A plurality of suction passages 137 are formed in the front and rear cylinder blocks 130 and 130 '. The suction passage 137 serves as a passage through which the working fluid supplied to the swash plate chamber 131 flows to each of the suction chambers 114 and 121. Connection passages 138 are formed in the front and rear cylinder blocks 130 and 130 ′ so as to be connected to the discharge chambers 115 and 122 of the front and rear housings 110 and 120. The connection passage 138 serves as a passage for discharging the working fluid compressed in the cylinder bore 134 to the outside.

One end of the rotation shaft 140 passes through the front housing 110 and the other end of the rotation shaft 140 faces the rotation 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. A plurality of shoes 146 surrounding the edge of the swash plate 142 is installed. The shoe 146 is configured to move along an edge of the swash plate 142.

The piston 150 is a linear reciprocating motion in the cylinder bore 134. The piston 150 has a substantially cylindrical shape corresponding to the inside of the cylinder bore 134, and both ends thereof are positioned at the cylinder bores 134 of the front and rear cylinder blocks 130 and 130 ′, respectively. Head portions 152 and 152 'are formed at both ends of the piston 150. The heads 152 and 152 'compress the working fluid in the cylinder bore 134. For reference, when compression occurs in the cylinder bore 134 where one end of the piston 150 is positioned, the suction process is performed in the cylinder bore 134 where the other end is located.

The piston 150 has a bridge portion 153 which connects the head portions 152 and 152 'to each other. A shoe seating portion 154 is formed in the middle portion of the bridge portion 153 so that the shoe 146 can be inserted therein. The piston 150 is linearly reciprocated along the rotation of the swash plate 142 by coupling the shoe 146 to both sides of the shoe seating part 154.

On both sides of the bridge portion 153, a pair of anti-rolling ribs 155 and 155 'are formed. The rolling prevention ribs 155 and 155 'protrude from the outer surface of the piston 150. Surfaces of the rolling prevention ribs 155 and 155 'facing each other are formed in a shape corresponding to the outer circumferential surface of the swash plate 142. The rolling prevention ribs 155 and 155 'are for preventing the piston 150 from rolling. That is, since the swash plate 142 is inclined to rotate in a state coupled to the piston 150, the piston 150 receives the force in the longitudinal direction and the radial force at the same time. Wherein the longitudinal force is a force for performing the compression operation of the working fluid, the radial force is to roll the piston (150). At this time, the outer circumferential surface of the swash plate 142 is in contact with the inner surface of the rolling prevention ribs (155, 155 ') by the radial force, the rotation of the piston 150 is regulated, thereby preventing the rolling phenomenon of the piston 150 Will be.

Oil holes 157 and 157 'are formed through the rolling prevention ribs 155 and 155'. The oil holes 157 and 157 'are formed long in the longitudinal direction of the piston 150. The oil holes 157 and 157 ′ are around the piston 150, that is, the swash plate 142 and the shoe 146, the swash plate 142 and the piston 150, and the piston 150 and the cylinder bore 134. It is formed to smooth the flow of oil between.

The valve unit 160 is used to control the discharge of the working fluid compressed in the cylinder bore 134 to the outside of the cylinder bore 134. 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 each of the suction chambers 114 and 121 and the cylinder are provided in the valve plate 162. A suction hole 163 communicating with the bore 134 and a discharge hole 164 communicating with each of the discharge chambers 115 and 122 and the cylinder bore 134 are formed.

In addition, a suction lead and a discharge lead (not shown) are used to selectively open and close the suction hole 163 and the discharge hole 164, respectively. The suction lead and the discharge lead may be elastically deformable, and may be elastically deformed according to the pressure of the working fluid in the cylinder bore 134 to open the suction hole 163 and the discharge hole 164.

Mufflers 170 are formed on outer surfaces of the front and rear cylinder blocks 130 and 130 '. The muffler 170 serves to reduce the pulsation and noise of the working fluid. The muffler 170 has a suction port 171 for sucking the working fluid supplied from the outside (evaporator) of the compressor 100 and a discharge port 172 for discharging the working fluid to the outside (condenser) of the compressor 100. Is formed.

According to another embodiment of the present invention, as shown in Figure 5, the oil hole (157, 157 ') may be formed in a plurality. In the present embodiment, two oil holes 157 and 157 'are formed in a circular shape for each of the anti-rolling ribs 155 and 155'. At this time, the oil is around the piston 150, ie, the swash plate 142 and the shoe 146, the swash plate 142 and the piston 150, and the piston 150 through a plurality of the oil holes (157, 157 '). ) And the cylinder bore 134 can be smoothly flow.

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

The compressor 100 is driven by a driving force transmitted from the outside. As the rotary shaft 140 rotates by an external driving force, the swash plate 142 is rotated together with the rotary shaft 140. Rotation of the swash plate 142 allows the piston 150 to linearly reciprocate in the cylinder bore 134. At this time, since the anti-rolling ribs 155 and 155 'are formed at both sides of the bridging portion 153 of the piston 150, the outer circumferential surface of the swash plate 142 contacts the anti-rolling ribs 155 and 155'. Rotation of 150 is regulated. As such, as the rolling phenomenon of the piston 150 is prevented, friction between the inner surface of the cylinder bore 134 and the outer surface of the piston 150 is prevented.

As the rotary shaft 140 rotates, the working fluid is supplied to the swash plate chamber 131 through the suction port 171 of the muffler 170. The working fluid supplied to the swash plate chamber 131 flows to the suction chambers 114 and 121 of the front and rear housings 110 and 120 along the suction passage 137. At this time, the suction lead is opened so that the working fluid of the suction chambers 114 and 121 is transferred into the cylinder bore 134 through the suction hole 163.

When the working fluid is delivered to the cylinder bore 134, and the piston 150 of the corresponding cylinder bore 134 moves in the direction of the valve unit 160, compression of the working fluid occurs. At this time, the oil smoothly flows through the oil holes 157 and 157 'formed in the anti-rolling ribs 155 and 155' of the piston 150, between the swash plate 142 and the shoe 146 and the swash plate 142. Oil flows between the pistons 150 to reduce friction. In addition, as the oil flows smoothly between the outer surface of the piston 150 and the inner surface of the cylinder bore 134 through the oil holes 157 and 127 ', the piston 150 is inside the cylinder bore 134. Will be able to move more smoothly.

On the other hand, the working fluid compressed in the cylinder bore 134 is discharged to the discharge chamber 115 of the front housing 110, the connection passage 138 formed in the front and rear cylinder blocks (130, 130 ') Accordingly, it flows to the discharge chamber 122 of the rear housing 120 and is transferred to the condenser through the discharge port 172 together with the working fluid there.

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 sectional view showing the construction of a general compressor.

2 is a plan view showing the configuration of a piston constituting a general compressor.

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

Figure 4 is a plan view showing the configuration of a piston constituting an embodiment of the present invention.

5 is a plan view showing the configuration of a piston constituting another embodiment of the present invention.

 Explanation of symbols on the main parts of the drawings

100: compressor 110: front housing

112: shaft hole 114: suction chamber

115: discharge chamber 120: rear housing

121: suction chamber 122: discharge chamber

130: front cylinder block 130 ': rear cylinder block

131: swash chamber 132: shaft supporter

134: cylinder bore 140: rotation axis

142: Saphan 146: Shoe

150: piston 152,152 ': head portion

153: bridge portion 154: shoe seating portion

155,155 ': Rolling prevention rib 157,157': Oil ball

160: valve unit 162: valve plate

163: suction hole 164: discharge hole

170: muffler 171: suction port

172: discharge port

Claims (2)

Front and rear housings 110 and 120 forming an outer appearance of at least both ends of the compressor 100; Located between the front and rear housing (110, 120) , the swash plate chamber 131 is formed by the recessed portion of the surface coupled to each other, and a plurality of cylinder bores around the shaft support hole 132 penetrating the center ( 134, the front and rear cylinder blocks (130, 130 ') are formed; A rotating shaft 140 rotatably installed to penetrate the front and rear cylinder blocks 130 and 130 '; A swash plate 142 which is installed to be inclined on the rotation shaft 140 and integrally rotated and positioned in the swash plate chamber 131; And The circumference of the swash plate 142 is connected by the shoe 146 to the outer circumference of the swash plate 142 and linearly reciprocates in the cylinder bore 134 according to the rotational movement of the swash plate 142. In the compressor provided with; a plurality of pistons (150) formed with anti-rolling ribs (155, 155 ') formed to protrude on the outer surface in a shape corresponding to the The pair of rolling prevention ribs 155 and 155 'have oil holes 157 and 157' which are penetrated to connect the inside and the outside of the swash plate 142 in a direction perpendicular to the rotation shaft 140 , respectively. Compressor , characterized in that formed . The method according to claim 1, Compressor, characterized in that the oil hole (157,157 ') is formed to extend in the longitudinal direction of the piston (150).

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