CN105889076A - Main frame of scroll compressor and scroll compressor - Google Patents

Abstract

The invention discloses a main frame of a scroll compressor and the scroll compressor. The main frame of the scroll compressor includes a bearing seat, one side of the bearing seat is provided with a cross slip ring support surface, and the cross slide At least two key grooves are arranged on the ring supporting surface, and oil grooves are connected on both sides of the key grooves to lubricate the relative movement between the Oldham slip ring and the main frame. The technical solution of the present invention is to set up an oil groove on the supporting surface of the Oldham slip ring of the main frame, and through this oil groove, a certain amount of oil can be stored, which can not only lubricate the relative movement between the Oldham slip ring and the main frame, but also better The lubricating keyway and the relative movement between the convex keys of the cross slip ring reduce the friction and collision strength and the power consumption of the scroll compressor to overcome the friction work, thereby improving the reliability of the scroll compressor.

Description

The main frame of the scroll compressor and the scroll compressor

technical field

The invention relates to the field of compressors, in particular to a main frame of a scroll compressor and the scroll compressor.

Background technique

Scroll compressors are increasingly used as compressors in refrigeration and air conditioning applications. Generally, a scroll compressor is mainly composed of a movable scroll, a fixed scroll, an Oldham slip ring, a main frame, a crankshaft, a motor, a housing, and the like. The movable scroll in the scroll compressor rotates 180° relative to the fixed scroll and is installed eccentrically. The motor in the scroll compressor drives the crankshaft so that the movable scroll orbits relative to the fixed scroll, thus forming a series of crescent-shaped spaces between the movable scroll and the wraps of the fixed scroll. During the orbiting process of the orbiting scroll, the crescent-shaped space on the outermost edge is constantly moving to the center, while the volume of the crescent-shaped space is also decreasing, so that the gas volume in this space decreases and the pressure increases. Until it communicates with the central exhaust hole, the compressed gas is discharged from the compressor.

In addition, the scroll compressor also uses an Oldham slip ring, which is used to satisfy the orbit of the movable scroll around the center of the fixed scroll and prevent the rotation of the movable scroll. The Oldham slip ring can take various forms, but generally includes a pair of first protruding keys and a pair of second protruding keys. The first protruding key fits in the key groove of the movable scroll, and the second protruding key fits in the key groove of the fixed scroll or the main frame. The Oldham slip ring with convex key is used to prevent the rotating motion of the movable scroll relative to the fixed scroll by matching the corresponding keyway, which will inevitably cause friction and collision between the Oldham slip ring and the main frame, resulting in unnecessary noise. Increase the power consumption of the compressor to overcome friction, and even cause the Oldham slip ring to be stuck.

Contents of the invention

The main purpose of the present invention is to provide a main frame of a scroll compressor and the scroll compressor, aiming at reducing the relative friction between the Oldham slip ring and the main frame and improving the working efficiency of the scroll compressor.

To achieve the above object, the present invention provides a main frame of a scroll compressor, comprising a bearing seat, one side of the bearing seat is provided with an Oldham slip ring support surface, and the Oldham slip ring support surface is provided with at least Two key slots, the two sides of the key slots are connected with oil-filled oil grooves for lubricating the relative movement between the Oldham slip ring and the main frame.

Preferably, the center of the bearing seat is provided with a bearing hole penetrating the main frame along the axial direction of the main frame; the oil groove communicates with one end of the oil supply passage provided on the movable scroll of the scroll compressor, and The other end of the oil supply channel communicates with the bearing hole.

Preferably, the width of the oil groove is not greater than half of the width of the supporting surface of the Oldham ring.

Preferably, the oil groove is a groove provided on the supporting surface of the Oldham ring, and the distance from the oil groove to both sides of the supporting surface of the Oldham ring is equal.

Preferably, there are two key grooves, which are arranged symmetrically with respect to the center of the circle of the supporting surface of the Oldham slip ring.

Preferably, the inner sidewall of the key groove forms an oil guiding surface.

Preferably, the oil guide surface is an inclined surface or an arc surface.

In addition, in order to achieve the above object, the present invention also provides a scroll compressor, comprising an Oldham slip ring and the above-mentioned main frame of the scroll compressor, the Oldham slip ring is located on the main frame, and the Oldham slip ring The protruding key is accommodated in the key groove of the main frame.

Preferably, the movable scroll and the fixed scroll of the scroll compressor are supported on the main frame, and the Oldham slip ring support surface of the main frame is fastened to the fixed scroll ring on the bearing housing. form a storage groove; the movable disk body of the movable scroll is also provided with an oil supply passage, and one end of the oil supply passage communicates with the storage groove of the main frame, and the other end passes through the movable disk body and connects with the The bearing holes of the main frame are connected.

Preferably, the oil supply channel includes a first sub-channel extending along the axial direction of the rotor body, and a second sub-channel extending along the radial direction of the rotor body and communicating with the first sub-channel; The first sub-channel may pass through the side of the moving disc body close to the main frame, and communicate with the bearing hole of the main frame.

The technical solution of the present invention is to set up an oil groove on the supporting surface of the Oldham slip ring of the main frame, and through this oil groove, a certain amount of oil can be stored, so that the lubricating oil can lubricate the relative movement between the Oldham slip ring and the main frame, and more Good lubricated keyways and the relative movement between the convex keys of the cross slip ring reduce the friction and collision strength and the power consumption of the scroll compressor to overcome friction, thereby improving the reliability of the scroll compressor.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative effort.

Fig. 1 is a cross-sectional view of a scroll compressor provided by the present invention;

Fig. 2 is a structural diagram of an Oldham slip ring provided by the present invention;

Fig. 3 is a three-dimensional schematic view of the main frame of the scroll compressor provided by the present invention;

Fig. 4 is a top structural view of the main frame of the scroll compressor provided by the present invention;

Fig. 5 is a schematic diagram of the joint between the main frame and the Oldham slip ring provided by the present invention;

Fig. 6 is a schematic cross-sectional view at A in Fig. 4;

Fig. 7 is a schematic diagram of the oil guide surface of the main frame provided by the present invention as an arc surface;

Fig. 8 is a schematic cross-sectional view of the keyway on the main frame provided by the present invention.

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention, they are only used to explain the various components in a certain posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

In addition, if the description of "first", "second" and so on in the present invention is used for description purposes only, it should not be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features . Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present invention.

As shown in FIG. 1 , the scroll compressor 100 includes a sealed accommodation space formed by a casing 101 , an upper cover 102 and a lower cover 103 , that is, a compressor housing. The casing 101 is a cylindrical cylinder with openings at both ends. The upper cover 102 fits and engages with an opening of the cylinder body, and the middle part of the upper cover 102 is arched. The lower cover 103 fits and engages with another opening of the cylinder body, and the middle part of the lower cover 103 is arched. The arched lower cover 103 surrounds the cylinder body to form an oil pool 16 at the bottom of the compressor for installing lubricating oil.

A fixed scroll 11 , a movable scroll 12 , a main frame 13 , a crankshaft 14 , a motor 15 , a subframe 17 , and an Oldham slip ring 20 are arranged in the accommodation space. Wherein, the main frame 13 is fixed in the casing of the scroll compressor 100 and placed on the upper end of the casing 101 , and the movable scroll 12 is supported by the main frame 13 and engaged with the fixed scroll 11 to form a gas compression chamber. The sub-frame 17 is fixed on the lower end of the casing 101 , and the motor 15 is located between the main frame 13 and the sub-frame 17 . The upper end of the crankshaft 14 passes through the motor 15 and is connected with the movable scroll 12, and the lower end is supported on the sub-frame 17, and the lower end of the crankshaft 14 also extends into the oil pool 16 through the oil guide member.

The movable scroll 12 includes a movable disk body, a movable scroll 122 and an eccentric sleeve 142 . The movable scroll 12 is driven by the crankshaft 14 of the scroll compressor 100, the crankshaft 14 and the rotor of the motor 15 of the scroll compressor 100 are relatively fixedly arranged together, and the crankshaft 14 is supported by the main frame 13 on the scroll compressor 100 Inside the casing 101. When the motor 15 of the scroll compressor 100 is started, the rotor of the motor 15 drives the crankshaft 14 which is relatively fixed therewith to rotate. The crankshaft 14 has an eccentric shaft, and the eccentric shaft is arranged in the eccentric sleeve 142 of the movable scroll 12 through a sliding bearing. In order to make the movable scroll 12 only do parallel motion with respect to the fixed scroll 11 , but not rotate, an Oldham slip ring 20 is arranged between the movable scroll 12 and the main frame 13 . When the crankshaft 14 rotates under the drive of the motor 15, the crankshaft 14 performs an eccentric rotational motion along the eccentric shaft, and the eccentric shaft drives the movable scroll 12 to perform a translational motion along a certain trajectory through the eccentric sleeve 142 of the movable scroll 12.

The fixed scroll 11 includes a fixed disk body and a fixed scroll 112 . Both the fixed scroll 11 and the movable scroll 12 are located in the cylinder and close to the upper cover 102 . The fixed scroll 11 is arranged closer to the upper cover 102 than the movable scroll 12 , and the fixed scroll and the upper cover 102 are enclosed to form an exhaust chamber 30 . The spiral teeth of the fixed scroll 11 and the movable scroll 12 mesh with each other to form a series of crescent-shaped compression chambers. The fixed scroll 11 is also provided with an exhaust hole, and the fixed scroll 11 is connected with a suction pipe 18. The suction pipe 18 extends along the radial direction of the fixed scroll 11 and passes through the casing 101 . Of course, the suction pipe 18 can also extend along the axial direction of the fixed scroll 11 and pass through the upper cover 102, and the low-pressure refrigerant gas is sucked into the fixed scroll 11 and the movable scroll 12 by the suction pipe 18 to form In the compression chamber of the fixed scroll, after the gas is compressed, it is discharged from the exhaust hole of the fixed scroll 11 to the exhaust chamber 30, and finally discharged through the exhaust pipe 19.

The above-mentioned main frame 13 is located below the movable scroll 12 and is used to support the movable scroll 12 and the fixed fixed scroll 11 . The center of the main frame 13 is provided with a bearing hole extending along the axial direction of the main frame 13 . The crankshaft 14 passes through the bearing hole and connects with the movable scroll to drive the movable scroll 12 to work.

Based on the above-mentioned scroll compressor, the present invention also proposes a structure of a scroll compressor main frame applied to the scroll compressor. Taking the Oldham slip ring 20 with four protruding keys as an example, the detailed structure of the main frame of the scroll compressor will be described below. With respect to the Oldham slip rings 20 with four protruding keys, two are arranged on one side to cooperate with the movable scroll; two are arranged on the other side to cooperate with the main frame 13 .

As shown in Fig. 2, it shows the structure for the Oldhams slip ring 20 according to the embodiment of the present invention. The Oldham ring 20 is ring-shaped, and two symmetrically arranged first protruding keys 21 are formed on one side along the longitudinal symmetry line AA', and two symmetrically arranged first convex keys 21 are formed on the other side along the transverse symmetry line BB'. Two convex keys 22.

1, the Oldham slip ring 20 is located between the main frame 13 and the movable scroll 12, and the first convex key 21 of the Oldham slip ring 20 cooperates with the movable scroll 12, and the second key of the Oldham slip ring 20 The convex key 22 cooperates with the main frame 13 to prevent the movable scroll 12 from rotating when the scroll compressor is in operation.

Referring to FIGS. 3 to 5 , the main frame 13 is located below the movable scroll 12 and is columnar as a whole. The main frame can include a bearing seat 133, and one side of the bearing seat 133 is provided with a movable scroll support part 134 and a fixed scroll support part 137, and the fixed scroll support part 137 is located on the movable scroll outside of the support portion 134 . A receiving groove 131 for receiving an Oldham slip ring is formed between the movable scroll support part 134 and the fixed scroll support part 137 . When the fixed scroll 11 is placed on the fixed scroll support portion 137 and the movable scroll 12 is placed on the movable scroll 134, part of the movable scroll 12 extends into the receiving groove 131, and the fixed scroll 11 and the movable scroll After the scroll 12 is engaged, it forms a housing groove 131 with the fixed scroll support portion 137 and the movable scroll support portion 134 . Moreover, the bottom of the receiving groove 131 forms an Oldham slip ring supporting surface 135 for supporting the Oldham slip ring 20 .

At least two key grooves 136 are provided on the Oldham ring support surface 135, and oil grooves 1351 filled with oil communicating with both sides of the key grooves 136 are used to lubricate the relative movement between the Oldham ring 20 and the main frame 13. The Oldham slip ring 20 is supported on the Oldham slip ring support surface 135 , and the Oldham slip ring 20 generates a translational motion on the Oldham slip ring support surface 135 driven by the movable scroll 12 .

The oil grooves 1351 between every two key grooves 136 are communicable oil grooves 1351 , or only a section of the oil grooves 1351 arranged on both sides of each key groove 136 communicates with the key grooves 136 . A section of oil groove 1351 provided on both sides of each key groove 136 also satisfies the work of lubricating the work between the Oldhams slip ring 20 and the support surface 135 of the Oldhams slip ring 20 and the relative friction between the second protruding keys 22 of the Oldhams slip ring 20 . Preferably, the oil groove 1351 of this embodiment is an oil groove connected between every two key grooves 136, such a design ensures lubrication of the contact area between all Oldham rings 20 and the supporting surface 135 of the Oldham ring, and the maximum Minimize the relative friction between the Oldham ring 20 and the Oldham ring support surface 135, which is most beneficial to reduce the work done by the scroll compressor to overcome the friction between the Oldham ring 20 and the Oldham ring support surface 135 .

Furthermore, the key groove 136 is arranged symmetrically with respect to the center of the circle of the supporting surface 135 of the Oldham slip ring. The key grooves 136 are arranged symmetrically, which ensures that the lengths of the oil grooves 1351 between the key grooves 136 are equal. It can be understood that the amount of oil in the oil grooves 1351 on both sides is basically the same, and this structure can effectively ensure that the equal amount of oil can basically equal the lubrication degree of the motion friction between the Oldham slip ring 20 and the main frame 13, so that the cross The degree of wear on both sides of the slip ring 20 and the keyway 136 is balanced, which ensures the service life of the Oldham slip ring 20 and the scroll compressor 100 .

The technical solution of the present invention is to set up an oil groove on the supporting surface of the Oldham slip ring of the main frame, and through this oil groove, a certain amount of oil can be stored, which not only allows lubricating oil to lubricate the relative movement between the Oldham slip ring and the main frame, but also Better lubricated keyways and the relative movement between the convex keys of the Oldham slip ring reduce the friction and collision strength and the power consumption of the scroll compressor to overcome friction, thereby improving the reliability of the scroll compressor.

The oil groove 1351 can store a certain amount of oil to lubricate the relative movement between the main frame 13 and the Oldham slip ring 20 during the operation of the compressor.

In another embodiment, the lubricating oil in the oil tank 1351 is supplied by the oil at the bottom of the compressor during the operation of the compressor. Specifically, the movable disk body of the movable scroll is also provided with an oil supply channel 121, and one end of the oil supply channel is accommodated between the fixed scroll support part 137 and the movable scroll support part 134 in the main frame 13. The groove 131 communicates, and the other end passes through the movable disk body of the movable scroll and communicates with the bearing hole of the main frame 13 . The oil supply passage 121 is used to guide the oil brought up by the crankshaft 14 into the receiving groove 131 for receiving the Oldham slip ring 20 , and then flow into the oil groove 1351 . The oil supply channel 121 includes a first sub-channel extending along the axial direction of the rotor body, and a second sub-channel extending along the radial direction of the rotor body and communicating with the first sub-channel. The first sub-channel can pass through the side of the moving disc body close to the main frame 13 and communicate with the bearing hole of the main frame 13 . It can be understood that the structure of the oil supply channel 121 of the present invention can also be other deformed structures, as long as the oil supply channel that can communicate with the bearing hole of the main frame 13 and the receiving groove 131 of the main frame 13 is within the protection scope of the present invention.

The middle part of the eccentric sleeve 142 of the movable scroll 12 is connected to the crankshaft oil delivery pipe 141 of the scroll compressor to receive the oil absorbed from the crankshaft oil delivery pipe 141 from the oil pool 16 at the bottom of the scroll compressor through the centrifugal pressure difference. . A part of the absorbed oil is used for the translational movement of the movable scroll 12 , and a part is used for entering the oil supply passage 121 of the movable scroll through the pressure difference. The oil that enters the oil supply channel 121 flows out from the outlet that communicates with the receiving groove 131, and flows along the side wall of the receiving groove 131 or drops onto the Oldham slip ring support surface 135, and passes through the Oldham slip ring 20 and the Oldham slip ring. The relative movement of the ring support surface pushes the dripping oil to the oil groove 1351 for storage, and the stored oil continues to lubricate the relative movement between the Oldham slip ring 20 and the Oldham slip ring support surface 135 .

Further, the width of the above-mentioned oil groove 1351 is not more than half of the width of the Oldham slip ring support surface 135. If the oil groove 1351 is too wide, the support force of the Oldham slip ring support surface 135 on the Oldham slip ring 20 is reduced, which is not conducive to the overall structure of the main frame. It is strong, but it is also prone to the problem of excessive oil volume, which cannot fully utilize the excess oil volume. The width of the oil groove 1351 is not greater than half of the width of the Oldham slip ring 20 , which can effectively ensure the full utilization of the oil quantity and the firmness of the structure of the main frame 13 .

Furthermore, the above-mentioned oil groove 1351 is a groove provided on the supporting surface 135 of the Oldhams slip ring, and the distance from the oil groove 1351 to both sides of the supporting surface 135 of the Oldhams slip ring is equal. This structure ensures that the top surface of the groove is on the same plane as the Oldham slip ring support surface 135, which not only satisfies the seamless support for the Oldham slip ring 20, but also satisfies the contact between the Oldham slip ring 20 and the Oldham slip ring support surface 135. Lubricating with oil can effectively reduce the motion friction between the Oldham ring 20 and the supporting surface 135 of the Oldham ring.

According to an embodiment of the main frame 13 of the scroll compressor of the present invention, as shown in FIG. 6 , the side of the Oldham slip ring support surface 135 extends to the inner wall of the keyway 136 by connecting an oil guide surface 1352 , the oil guiding surface 1352 is a chamfer or a rounded corner connecting the bottom wall of the oil groove 1351 and the side wall of the key groove 136 . This design ensures that the oil in the oil groove 1351 can flow down into the keyway 136 along the oil guide surface 1352 due to gravity, and ensures that the keyway 136 is also filled with oil for lubricating the relative movement between the Oldham slip ring 20 and the wall of the main frame 13 . As shown in Figure 8, when the cross section of the keyway 136 is observed from the moving direction of the second convex key 22 of the Oldham slip ring 20, this structure is the side wall of the keyway 136 at right angles to the oil guide surface 1352, reducing the side wall of the keyway 136 and the Oldham slip ring. The direct contact area of the second protruding key 22 of 20 reduces the friction between the side wall of the key groove 136 and the second protruding key 22 of the Oldham slip ring 20, and at the same time increases the friction between the oil body and the side wall of the key groove 136 and the Oldham slip ring 20. The area of relative motion lubrication between them reduces the work done by the scroll compressor to overcome the friction and improves the working efficiency of the scroll compressor.

According to yet another embodiment of the main frame of the present invention, the oil guide surface 1352 is an inclined surface as shown in FIG. 6 and an arc surface as shown in FIG. 7 . The above-mentioned oil guide surface 1352 is set in the main frame 13, which ensures that the oil in the oil groove 1351 can flow down into the keyway 136 along the oil guide surface 1352 due to gravity, and ensures that the keyway 136 is also filled with oil for lubricating the Oldham slip ring 20 and the main engine. Relatively moving oil bodies between the walls of frame 13.

In the description of this specification, descriptions referring to the terms "preferred", "further", "further", "further", or "specific" mean that the descriptions described in conjunction with the embodiments or examples A particular feature, structure, material, or characteristic is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and does not therefore limit the patent scope of the present invention. Under the inventive concept of the present invention, the equivalent structural transformation made by using the description of the present invention and the contents of the accompanying drawings, or direct/indirect use All other relevant technical fields are included in the patent protection scope of the present invention.

Claims (10)

1. A main frame of a scroll compressor, comprising a bearing seat, one side of the bearing seat is provided with an Oldham slip ring support surface, and at least two key grooves are provided on the Oldham slip ring support surface, characterized in that , the two sides of the keyway are connected with oil grooves. 2. The main frame of the scroll compressor according to claim 1, wherein the center of the bearing seat is provided with a bearing hole penetrating through the main frame along the axial direction of the main frame; One end of the oil supply channel provided on the movable scroll of the rotary compressor communicates, and the other end of the oil supply channel communicates with the bearing hole. 3. The main frame of a scroll compressor according to claim 1 or 2, wherein the width of the oil groove is not greater than half of the width of the supporting surface of the Oldham slip ring. 4. The main frame of a scroll compressor according to claim 3, wherein the oil groove is a groove provided on the support surface of the Oldham slip ring, and the distance between the oil groove and the support surface of the Oldham slip ring is The distance between the two sides of the face is equal. 5 . The main frame of a scroll compressor according to claim 1 , wherein there are two key grooves, which are arranged symmetrically with respect to the center of the circle of the supporting surface of the Oldham slip ring. 6 . 6 . The main frame according to claim 1 , wherein an oil guide surface is formed on the inner side wall of the keyway. 6 . 7. The main frame of a scroll compressor according to claim 6, wherein the oil guide surface is an inclined surface or an arc surface. 8. A scroll compressor, characterized in that it comprises an Oldham slip ring and the main frame of the scroll compressor according to any one of claims 1-8, the Oldham slip ring is located on the main frame , and the protruding key of the Oldham slip ring is accommodated in the key groove of the main frame. 9. The scroll compressor according to claim 8, characterized in that, the movable scroll and the fixed scroll of the scroll compressor are supported on the main frame, and the Oldham slip ring support surface of the main frame It forms a receiving groove with the fixed scroll that is fastened to the bearing seat; an oil supply passage is provided on the movable disk body of the movable scroll, and one end of the oil supply passage is connected to the main frame. The receiving groove communicates, and the other end passes through the moving disk body and communicates with the bearing hole of the main frame. 10. The scroll compressor according to claim 9, wherein the oil supply passage includes a first sub-passage extending along the axial direction of the moving disk body, and a first sub-passage extending along the radial direction of the moving disk body. A second sub-channel extending in the direction and communicating with the first sub-channel; the first sub-channel can pass through the side of the moving disc body close to the main frame, and connect with the bearing hole of the main frame connected.