[0037] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0038] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as there is no conflict between them.
[0039] Such as Figure 2-Figure 6 As shown, this embodiment provides a pump body structure of a rotary piston 5 compressor, which includes a cylinder 1, an outer circle fitting structure 2, an oil guide groove 3, a rotary shaft 4, a piston 5 and a cylinder liner 6.
[0040] The cylinder 1 includes a cylinder body 11 and a convex shaft 12 extending outward from at least one end of the cylinder body 11. The cylinder body 11 is provided with a piston mounting hole 111. The convex shaft 12 is provided with a shaft installation hole 121 and at least one oil guide hole; the shaft installation hole 121 is suitable for installing the shaft 4; the oil guide hole penetrates the side wall of the convex shaft 12 and communicates with the shaft installation hole 121.
[0041] The outer circle matching structure 2 has two, which are respectively arranged at both ends of the cylinder 1, and are provided with a matching hole 21 suitable for mounting the convex shaft 12; the diameter of the matching hole 21 is smaller than the outer diameter of the cylinder 1; the cylinder 1 is relative to the outer circle Cooperate with structure 2 to rotate. As an alternative embodiment, the outer circle matching structure 2 may also have only one, which is provided at one end of the cylinder 1.
[0042] The oil guide groove 3 is provided on the hole wall of the fitting hole 21, and extends from the hole wall of the fitting hole 21 toward the cylinder body 11 to an end away from the cylinder body 11. As an alternative embodiment, the oil guide groove 3 may also be provided on the outer peripheral surface of the convex shaft 12, and the end of the convex shaft 12 connected with the cylinder body 11 extends to the end away from the cylinder body 11.
[0043] The piston 5 is installed in the piston installation hole 111 and is suitable for reciprocating movement in the piston installation hole 111.
[0044] The rotating shaft 4 is installed in the piston 5 and the rotating shaft mounting hole 121 and is eccentrically arranged with the cylinder 1.
[0045] The cylinder liner 6 is provided with a cylinder installation cavity suitable for installing the cylinder 1 and is connected with the outer circle matching structure 2.
[0046] The rotating shaft 4 rotates so that the piston 5 reciprocates relative to the cylinder 1 and drives the cylinder 1 to rotate relative to the cylinder liner 6.
[0047] By providing at least one oil guide hole on the convex shaft 12, the oil dispensed during the rotation of the rotating shaft 4 can be led out between the outer peripheral surface of the convex shaft 12 and the hole wall of the matching hole 21; at the same time, through the matching hole 21 An oil guide groove 3 is provided on the wall of the hole or on the outer peripheral surface of the convex shaft 12, and the oil guide groove 3 extends from the hole wall of the mating hole 21 toward the cylinder body 11 to the end away from the cylinder body 11, or The end of the convex shaft 12 connected with the cylinder body 11 extends to the end far away from the cylinder body 11, so that the oil sprayed from the oil guide hole during the rotation of the shaft 4 can enter the oil guide groove 3, thereby Lubricating the outer circumferential surface of the convex shaft 12 and the hole wall of the fitting hole 21 effectively reduces the wear between the cylinder 1 and the outer circle fitting structure 2 and improves the service life and reliability of the pump body structure and the compressor.
[0048] The specific shape of the oil guide groove 3 can be various. In this embodiment, the oil guide groove 3 is linear and extends along the axial direction of the fitting hole 21 or the axial direction of the convex shaft 12. As an alternative embodiment, the oil guide groove 3 can also be spiral, and the relationship between the rotation direction of the oil guide groove 3 and the rotation direction of the cylinder 1 is satisfied. When the cylinder 1 rotates relative to the outer circle matching structure 2, it is applied to the guide The oil in the oil groove 3 is a component of the force away from the cylinder body 11.
[0049] The specific position of the oil guide hole is not limited, and the oil guide hole in this embodiment is arranged close to the cylinder body 11.
[0050] The specific number of the oil guide holes can be various. In this embodiment, there are two oil guide holes, and they are arranged oppositely on the convex shaft 12. As an alternative embodiment, there may be only one oil guide hole. As an alternative embodiment, the oil guide holes may also have three or four, etc., evenly distributed along the circumferential direction of the convex shaft 12.
[0051] The pump body structure of the rotary piston 5 compressor provided in this embodiment further includes an annular oil storage groove 7 provided on the wall of the fitting hole 21 and connected with the oil guide groove 3 facing the cylinder body 11 Connect at one end. In this way, the oil supply of the oil guide groove 3 toward the end of the cylinder body 11 can be ensured, thereby ensuring effective lubrication between the outer peripheral surface of the convex shaft 12 and the hole wall of the mating hole 21. As an alternative embodiment, the oil reservoir 7 may also be provided on the outer peripheral surface of the convex shaft 12. As an alternative embodiment, the oil storage tank 7 can also be provided on the hole wall of the mating hole 21 and the outer peripheral surface of the convex shaft 12 at the same time.
[0052] The oil storage tank 7 can be formed in various ways. In this embodiment, the matching hole 21 is provided with a chamfer 8 at one end facing the cylinder body 11, and the oil storage tank 7 is formed between the chamfer 8 and the outer peripheral surface of the convex shaft 12. As an alternative embodiment, it is also possible that the outer peripheral surface of the end of the convex shaft 12 connected with the cylinder body 11 is provided with a chamfer 8, and an oil reservoir 7 is formed between the chamfer 8 and the hole wall of the mating hole 21. As an alternative embodiment, it is also possible that the end of the matching hole 21 facing the cylinder body 11 is provided with a chamfer 8; at the same time, the outer peripheral surface of the end where the convex shaft 12 is connected to the cylinder body 11 is provided with a chamfer 8; Between the upper chamfer 8 and the outer peripheral surface of the convex shaft 12, and between the chamfer 8 on the convex shaft 12 and the hole wall of the mating hole 21, an oil reservoir 7 is formed together, that is, between the two chamfers 8 The oil storage tank 7 is formed.
[0053] When the rotating shaft 4 drives the cylinder 1 to rotate, the area where the convex shaft 12 moves toward the hole wall of the corresponding matching hole 21, and the area corresponding to the hole wall of the matching hole 21 is the bearing area; the convex shaft 12 faces the corresponding area The area where the hole wall of the mating hole 21 moves, and the area of the hole wall of the mating hole 21 corresponding to this area is a non-load-bearing area.
[0054] The specific positions of the oil guide groove 3 on the hole wall of the mating hole 21 can be various. In this embodiment, the oil guide groove 3 is provided on the non-load-bearing area. Since the friction between the outer peripheral surface of the convex shaft 12 in the bearing area and the hole wall of the mating hole 21 is greater, the oil guide groove 3 is arranged on the non-load bearing area to ensure the continuity of the lubricating oil film in the bearing area, thereby ensuring the lubrication area It has a good lubrication effect, reduces the wear in the bearing area, and further reduces the wear between the outer peripheral surface of the convex shaft 12 and the hole wall of the mating hole 21, and also has the effect of preventing stress concentration in the bearing area.
[0055] The pump body structure of the rotary piston 5 compressor provided in this embodiment also includes a flange 9. The outer circle matching structure 2 is provided between the flange 9 and the cylinder body 11; the flange 9 is provided with an oil drain hole The oil drain hole is a through hole that penetrates the flange 9 in the axial direction and communicates with the end of the oil guide groove 3 away from the cylinder body 11. The setting of the oil drain hole can immediately discharge the oil in the oil guide groove 3 to the oil sump of the compressor, thereby forming an oil circuit. The oil in the oil guide groove 3 can take away the outer peripheral surface of the absorbed convex shaft 12 in real time. The frictional heat between the hole walls of the hole 21 reduces the temperature of the friction pair formed between the outer peripheral surface of the convex shaft 12 and the hole wall of the mating hole 21, and improves the reliability of the compressor.
[0056] The outer circle matching structure 2 may have various specific forms. The outer circle matching structure 2 in this embodiment is a limit plate.
[0057] This embodiment also provides a rotary piston 5 compressor, including the pump body structure of the rotary piston 5 compressor described above.
[0058] Obviously, the foregoing embodiments are merely examples for clear description, and are not intended to limit the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. There is no need and cannot give an exhaustive list of all implementation methods. The obvious changes or changes derived from this are still within the protection scope of the present invention.
