Pump assemblies and compressors

Abstract

The present invention provides a pump body assembly and a compressor. The pump body assembly includes: a crankshaft; an upper rolling plate, which forms a synchronous rotation structure with the crankshaft and has a first slide groove; a cylinder, which has a working chamber; a roller, which is eccentrically placed relative to the upper rolling plate and has a center hole. During the rotation of the roller in the working chamber, the inner wall of the center hole does not contact the crankshaft; a lower rolling plate, which has a second slide groove. In the axial projection plane of the lower rolling plate, the first slide groove and the second slide groove intersect, and the intersection point is located on the central axis of the roller; a first slider is provided on the side of the roller that cooperates with the upper rolling plate, and a second slider is provided on the side of the roller that cooperates with the lower rolling plate. The first slider can be slidably arranged in the first slide groove, and the second slider can be slidably arranged in the second slide groove. The pump body assembly according to the present invention can improve the problem of gas reflux affecting the suction volume, and at the same time can increase the support area and improve the reliability of the compressor.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a pump body assembly and a compressor. Background Art

[0002] Current air conditioners have increasingly higher requirements for compressor performance, and more ways to improve efficiency need to be explored. The existing pump body structure of the rotary compressor rotates one circle, and a large gap inevitably exists on the roller-cylinder contact surface. This large gap causes serious gas backflow on the high-pressure side, affecting the intake volume during the compression process and resulting in low energy efficiency. On the other hand, the existing pump body structure bearing has an eccentric part and a small support area. It is affected by the eccentric force and has severe contact friction with the flange. Summary of the Invention

[0003] The main purpose of the present invention is to provide a pump body assembly and a compressor, which can improve the problem of gas backflow affecting the suction volume, and at the same time can increase the support area and improve the reliability of the compressor.

[0004] In order to achieve the above object, according to one aspect of the present invention, a pump assembly is provided, comprising:

[0005] crankshaft;

[0006] An upper rolling plate, the upper rolling plate and the crankshaft form a synchronous rotation structure, and the upper rolling plate has a first sliding groove;

[0007] A cylinder having a working chamber;

[0008] The roller is rotatably mounted in the working chamber and is eccentrically positioned relative to the upper rolling plate. The roller has a center hole through which the crankshaft passes. When the roller rotates in the working chamber, the inner wall of the center hole does not contact the crankshaft.

[0009] The lower rolling plate has a second chute on a side facing the cylinder. In the axial projection plane of the lower rolling plate, the first chute and the second chute intersect, and the intersection of the first chute and the second chute is located on the central axis of the roller.

[0010] A first slider is provided on the side where the roller cooperates with the upper rolling disc, and a second slider is provided on the side where the roller cooperates with the lower rolling disc. The first slider can be slidably provided in the first sliding groove, and the second slider can be slidably provided in the second sliding groove.

[0011] Furthermore, the first sliding groove and the second sliding groove are perpendicular to each other.

[0012] Furthermore, the pump body assembly also includes an upper flange and a lower flange, the upper flange has a first mounting groove, the lower flange has a second mounting groove, the upper rolling plate can be rotatably installed in the first mounting groove, and the lower rolling plate can be rotatably installed in the second mounting groove.

[0013] Furthermore, a rolling fit is formed between the support surface of the upper rolling plate and the upper flange, and / or a rolling fit is formed between the support surface of the upper rolling plate and the cylinder.

[0014] Furthermore, a first annular rolling groove is provided on the end face of the cylinder facing the upper rolling plate, and a plurality of second rolling grooves are provided at circumferential intervals on the end face of the upper rolling plate facing the cylinder. The pump body assembly also includes balls provided between the first rolling groove and the second rolling groove.

[0015] Furthermore, a rolling fit is formed between the support surface of the lower rolling plate and the lower flange, and / or a rolling fit is formed between the support surface of the lower rolling plate and the cylinder.

[0016] Furthermore, a plurality of third rolling grooves are provided on the end surface of the lower rolling plate facing the lower flange, an annular fourth rolling groove is provided at the bottom of the second mounting groove, and the pump body assembly also includes balls provided between the third rolling groove and the fourth rolling groove.

[0017] Furthermore, a sliding vane groove is provided on the cylinder, and the pump body assembly also includes a sliding vane, which is slidably provided in the sliding vane groove.

[0018] Furthermore, avoidance grooves are respectively provided on the upper and lower sides of the slide. When the slide moves to the maximum extension position, the edges of the avoidance grooves are located radially outside the inner wall of the working chamber of the cylinder.

[0019] Furthermore, the arc head end edge of the avoidance groove is t, and the distance to the center of the cylinder is Lt. The other end of the avoidance groove is the tail end edge w, and the distance to the center of the cylinder is Lw. A first annular rolling groove is provided on the end surface of the cylinder facing the upper rolling disk. The maximum radius of the first rolling groove is Rrmax, and the minimum radius is Rrmin, where df≤Rrmin-Lt≤g, f≤Lw-Rrmax≤g, 0.3mm≤f≤0.5mm, 0.6mm≤g≤0.8mm.

[0020] Furthermore, the crankshaft includes a first part located on the first side of the upper rolling plate and a second part located on the second side of the upper rolling plate. The inner diameter of the roller is r1, the diameter of the second part is D2, and the eccentric distance of the roller relative to the upper rolling plate is e, where D2 / 2<r1-e.

[0021] Furthermore, the inner radius of the working chamber of the cylinder is R, the outer diameter of the roller is r2, the eccentric distance of the roller relative to the upper rolling plate is e, Ra≤r2+e+b≤R, where 0.01mm≤a≤0.03mm, 0.01mm≤b≤0.02mm, b<a.

[0022] Furthermore, the length of the first slider and the second slider is L, the inner radius of the working chamber of the cylinder is R, the eccentric distance of the roller relative to the upper rolling plate is e, L / 2-e≥R+c, 1.5mm≤c≤2.5mm.

[0023] Furthermore, a first annular rolling groove is provided on the end surface of the cylinder facing the upper rolling disk, and a plurality of second rolling grooves are provided on the end surface of the upper rolling disk facing the cylinder at circumferential intervals. The pump body assembly also includes a ball arranged between the first rolling groove and the second rolling groove. The maximum radius of the first rolling groove is Rrmax, the minimum radius is Rrmin, the length of the first slider is L, the diameter of the ball is Dg, and the eccentric distance of the roller relative to the upper rolling disk is e, L / 2+e+d≤Rrmin<D / 2-Dg / 2, Rrmax>D / 2+Dg / 2, 1mm≤d≤2mm.

[0024] Furthermore, the crankshaft and the upper rolling plate are integrally formed; or the crankshaft and the upper rolling plate are separately formed and connected via a spline.

[0025] According to another aspect of the present invention, a compressor is provided, comprising a pump body assembly, which is the above-mentioned pump body assembly.

[0026] The technical solution of the present invention is applied, and the pump body assembly includes: a crankshaft; an upper rolling plate, the upper rolling plate and the crankshaft form a synchronous rotation structure, the upper rolling plate has a first slide groove; a cylinder, having a working chamber; a roller, which can be rotatably installed in the working chamber and is eccentrically placed relative to the upper rolling plate, the roller has a center hole, the crankshaft is passed through the center hole, and during the rotation of the roller in the working chamber, the inner wall of the center hole does not contact the crankshaft; a lower rolling plate, a side facing the cylinder has a second slide groove, in the axial projection plane of the lower rolling plate, the first slide groove and the second slide groove intersect, and the intersection of the first slide groove and the second slide groove is located on the center axis of the roller; a first slider is provided on the side of the roller that cooperates with the upper rolling plate, and a second slider is provided on the side of the roller that cooperates with the lower rolling plate, the first slider can be slidably set in the first slide groove, and the second slider can be slidably set in the second slide groove. The pump body assembly realizes the eccentric setting of the roller by cooperating with the upper rolling plate and the lower rolling plate and the roller. The upper rolling plate and the lower rolling plate are coaxially arranged with the crankshaft. The structure of the crankshaft located in the center hole of the roller does not contact the inner wall of the center hole. Therefore, it can effectively eliminate the assembly gap generated by the cooperation between the roller and the crankshaft, and can enhance the gap control of the roller at the exhaust position, limit the gap in the high and low pressure decomposition area, effectively reduce the reflux and re-expansion of high-pressure gas, and increase the intake volume per unit time. Since the roller realizes eccentric movement through the cooperation of the upper rolling plate and the lower rolling plate, there is no need to set an eccentric part, which reduces the influence of the eccentric part on the shaft system and enhances the reliability of the compressor. Since the upper rolling plate and the lower rolling plate are used to cooperate with the cylinder for support, the support area is effectively increased, the stability of the shaft system is improved, and the reliability of the compressor is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 An exploded structural diagram of a pump assembly according to an embodiment of the present invention is shown;

[0029] Figure 2 A three-dimensional structural diagram of an upper flange of a pump assembly according to an embodiment of the present invention is shown;

[0030] Figure 3 A cross-sectional structural diagram of an upper flange of a pump assembly according to an embodiment of the present invention is shown;

[0031] Figure 4 The figure shows the overall structure of the crankshaft and the upper rolling plate of the pump assembly according to one embodiment of the present invention;

[0032] Figure 5 A three-dimensional structural diagram showing a crankshaft and an upper rolling plate of a pump assembly according to an embodiment of the present invention is shown;

[0033] Figure 6 A structural diagram showing a crankshaft and an upper rolling plate of a pump assembly according to an embodiment of the present invention is shown;

[0034] Figure 7 A cross-sectional structural diagram of a cylinder of a pump assembly according to an embodiment of the present invention is shown;

[0035] Figure 8 A three-dimensional structural diagram of a cylinder of a pump assembly according to an embodiment of the present invention is shown;

[0036] Figure 9 A cross-sectional structural diagram showing another perspective of a cylinder of a pump assembly according to an embodiment of the present invention;

[0037] Figure 10 A three-dimensional structural diagram of a lower rolling plate of a pump assembly according to an embodiment of the present invention is shown;

[0038] Figure 11 A three-dimensional structural diagram of a lower flange of a pump assembly according to an embodiment of the present invention is shown;

[0039] Figure 12 A cross-sectional structural diagram of a lower flange of a pump assembly according to an embodiment of the present invention is shown;

[0040] Figure 13 A three-dimensional structural diagram showing a roller of a pump assembly according to an embodiment of the present invention is shown;

[0041] Figure 14 A three-dimensional structural diagram of a slide of a pump assembly according to an embodiment of the present invention is shown;

[0042] Figure 15 A perspective structural diagram of a crankshaft of a pump assembly according to an embodiment of the present invention is shown;

[0043] Figure 16 A three-dimensional structural diagram of an upper rolling plate of a pump assembly according to an embodiment of the present invention is shown;

[0044] Figure 17 A diagram showing the assembly structure of a crankshaft and an upper rolling plate of a pump assembly according to an embodiment of the present invention; and

[0045] Figure 18 A schematic diagram showing the working process of the pump body assembly according to an embodiment of the present invention is shown.

[0046] The above drawings include the following reference numerals:

[0047] 1. Crankshaft; 2. Upper rolling plate; 3. First slide groove; 4. Cylinder; 5. Roller; 6. Center hole; 7. Lower rolling plate; 8. Second slide groove; 9. First slider; 10. Second slider; 11. Upper flange; 12. Lower flange; 13. First mounting groove; 14. Second mounting groove; 15. First rolling groove; 16. Second rolling groove; 17. Third rolling groove; 18. Slide; 19. Slide groove; 20. Avoidance groove; 21. Fourth rolling groove. DETAILED DESCRIPTION

[0048] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0049] See also Figures 1 to 18 As shown, according to an embodiment of the present invention, the pump body assembly includes: a crankshaft 1; an upper rolling plate 2, the upper rolling plate 2 and the crankshaft 1 form a synchronous rotation structure, the upper rolling plate 2 has a first slide groove 3; a cylinder 4, having a working chamber; a roller 5, which can be rotatably installed in the working chamber and is eccentrically placed relative to the upper rolling plate 2, the roller 5 has a center hole 6, the crankshaft 1 is passed through the center hole 6, and during the rotation of the roller 5 in the working chamber, the inner wall of the center hole 6 does not contact the crankshaft 1; a lower rolling plate 7, having a second slide groove 8 on the side facing the cylinder 4, in the axial projection plane of the lower rolling plate 7, the first slide groove 3 and the second slide groove 8 intersect, and the intersection of the first slide groove 3 and the second slide groove 8 is located on the central axis of the roller 5; a first slider 9 is provided on the side of the roller 5 cooperating with the upper rolling plate 2, and a second slider 10 is provided on the side of the roller 5 cooperating with the lower rolling plate 7, the first slider 9 can be slidably set in the first slide groove 3, and the second slider 10 can be slidably set in the second slide groove 8.

[0050] The pump body assembly realizes the eccentric setting of roller 5 by cooperating with upper rolling plate 2 and lower rolling plate 7 and roller 5. The upper rolling plate 2 and lower rolling plate 7 are coaxially arranged with crankshaft 1. The structure of crankshaft 1 located in the center hole 6 of roller 5 does not contact the inner wall of the center hole 6. Therefore, the assembly gap generated by the cooperation between roller 5 and crankshaft 1 can be effectively eliminated, which can enhance the gap control of roller 5 at the exhaust position, limit the gap in the high and low pressure decomposition area, effectively reduce the reflux and re-expansion of high-pressure gas, and increase the intake volume per unit time. Since roller 5 realizes eccentric movement by cooperating with upper rolling plate 2 and lower rolling plate 7, there is no need to set an eccentric part, which reduces the influence of the eccentric part on the shaft system and enhances the reliability of the compressor. Since upper rolling plate 2 and lower rolling plate 7 are used to cooperate with cylinder 4 for support, the support area is effectively increased, the stability of the shaft system is improved, and the reliability of the compressor is improved.

[0051] In this embodiment, the first slide groove 3 and the second slide groove 8 are arranged crosswise, and the roller 5 forms an anti-rotation fit with the first slide groove 3 through the first slider 9, and forms an anti-rotation fit with the second slide groove 8 through the second slider 10. When the upper rolling plate 2 rotates under the driving action of the crankshaft 1, the roller 5 will be driven to rotate together with the upper rolling plate 2, and at the same time, the roller 5 will drive the lower rolling plate 7 to rotate together, so that the upper rolling plate 2, the roller 5 and the lower rolling plate 7 rotate together with the crankshaft 1, thereby realizing the rotation drive of the roller 5.

[0052] Because roller 5 is eccentrically positioned relative to upper rolling plate 2, and the eccentric distance ensures that one side of roller 5 forms a seal with the inner wall of the working chamber of cylinder 4, roller 5 can perform the functions of a conventional roller, achieving the suction and compression of refrigerant. Upper rolling plate 2 and lower rolling plate 7 are circumferentially limited by roller 5, so their relative circumferential positions do not change. Furthermore, both upper rolling plate 2 and lower rolling plate 7 are coaxially positioned with crankshaft 1, so their radial positions do not change. The relative positions of upper rolling plate 2 and lower rolling plate 7 on crankshaft 1 are fixed. Consequently, the rotational position of roller 5 is limited by upper rolling plate 2 and lower rolling plate 7, ensuring that roller 5 always rotates at the same offset distance relative to the rotation axis of crankshaft 1. Therefore, roller 5 can cooperate with cylinder 4 to achieve the suction and compression of refrigerant.

[0053] In one embodiment, the first sliding groove 3 and the second sliding groove 8 are perpendicular to each other.

[0054] In this embodiment, since the position at which the roller 5 is tangent to the inner wall of the cylinder 4 is determined by the first slide groove 3, and the force for the roller 5 to form a seal with the inner wall of the cylinder 4 comes from the pressure exerted by the second slide groove 8 on the second slider 10, the smaller the angle formed between the first slide groove 3 and the second slide groove 8, the greater the force required for the lower rolling plate 7 to maintain the roller 5 and the inner wall of the cylinder 4 to form a seal, which will result in greater power consumption. When the first slide groove 3 and the second slide groove 8 are perpendicular to each other, the lower rolling plate 7 only exerts a force on the roller 5 to press against the inner wall of the cylinder 4, and there is no component force in other directions. Therefore, in this case, the force required to be provided by the lower rolling plate 7 is the smallest, the force-bearing performance is the best, and the structural stability is also the best.

[0055] In one embodiment, the pump body assembly further includes an upper flange 11 and a lower flange 12, the upper flange 11 having a first mounting groove 13, the lower flange 12 having a second mounting groove 14, the upper rolling plate 2 can be rotatably mounted in the first mounting groove 13, and the lower rolling plate 7 can be rotatably mounted in the second mounting groove 14.

[0056] In this embodiment, the first mounting groove 13 is provided to provide space for installing the upper rolling plate 2 and to limit the upper rolling plate 2, thereby improving the stability and reliability of the upper rolling plate 2 during operation. The second mounting groove 14 is provided to provide space for installing the lower rolling plate 7 and to limit the lower rolling plate 7, thereby improving the stability and reliability of the lower rolling plate 7 during operation.

[0057] In one embodiment, a rolling fit is formed between the support surface of the upper rolling plate 2 and the upper flange 11 , and / or a rolling fit is formed between the support surface of the upper rolling plate 2 and the cylinder 4 .

[0058] By forming a rolling fit between the upper rolling plate 2 and the upper flange 11 and / or between the upper rolling plate 2 and the cylinder 4, on the one hand, the rolling fit can be used to increase the radius at the support position, increase the support surface, and improve the support stability; on the other hand, the sliding fit in the conventional structure can be adjusted to a rolling fit, thereby reducing the friction that needs to be overcome during the rotation of the roller 5 and reducing power consumption.

[0059] In one embodiment, a rolling fit may be formed solely between the upper supporting surface of the upper rolling plate 2 and the upper flange 11 .

[0060] In one embodiment, a rolling fit may be formed solely between the upper supporting surface of the upper rolling plate 2 and the cylinder 4 .

[0061] In one embodiment, rolling fit can be formed between the upper supporting surface of the upper rolling plate 2 and the upper flange 11 , and between the upper supporting surface of the upper rolling plate 2 and the cylinder 4 at the same time.

[0062] The above-mentioned rolling fit can be achieved through balls or rollers.

[0063] In one embodiment, a first annular rolling groove 15 is provided on the end face of the cylinder 4 facing the upper rolling disk 2, and a plurality of second rolling grooves 16 are provided on the end face of the upper rolling disk 2 facing the cylinder 4 at circumferential intervals, and the pump body assembly also includes balls arranged between the first rolling groove 15 and the second rolling groove 16.

[0064] In this embodiment, a first annular rolling groove 15 is provided on the end face of the cylinder 4, and a second rolling groove 16 is provided on the end face of the upper rolling disk 2, wherein the cross-section of the first rolling groove 15 is, for example, semicircular, and the second rolling groove 16 is a hemispherical groove, a cylindrical groove, a truncated cone groove or a prismatic groove. The size of the groove needs to be adapted to the diameter of the roller to avoid the groove being too large, resulting in an excessive range of motion of the roller and an unstable support structure, and to avoid the groove being too small, resulting in excessive friction resistance between the groove and the roller, affecting the rolling fit effect.

[0065] In this embodiment, the sum of the depths of the first rolling groove 15 and the second rolling groove 16 is slightly equal to the ball diameter, so that a clearance fit can be formed between the upper rolling plate 2 and the upper end surface of the cylinder 4, reducing the rotational friction of the upper rolling plate 2. The clearance is small enough to form a stable sealing oil film between the mating end surfaces of the upper rolling plate 2 and the cylinder 4.

[0066] In one embodiment, a rolling fit is formed between the support surface of the lower rolling plate 7 and the lower flange 12 , and / or a rolling fit is formed between the support surface of the lower rolling plate 7 and the cylinder 4 .

[0067] By forming a rolling fit between the lower rolling plate 7 and the lower flange 12 and / or between the lower rolling plate 7 and the cylinder 4, on the one hand, the rolling fit can be used to increase the radius at the support position, increase the support surface, and improve the support stability; on the other hand, it can reduce the friction that needs to be overcome during the rotation of the roller 5 and reduce power consumption.

[0068] In one embodiment, a rolling fit may be formed solely between the supporting surface of the lower rolling plate 7 and the lower flange 12 .

[0069] In one embodiment, a rolling fit may be formed solely between the supporting surface of the lower rolling plate 7 and the cylinder 4 .

[0070] In one embodiment, rolling fit can be formed between the supporting surface of the lower rolling plate 7 and the lower flange 12 , and between the supporting surface of the lower rolling plate 7 and the cylinder 4 at the same time.

[0071] In one embodiment, a plurality of third rolling grooves 17 are provided on the end face of the lower rolling plate 7 facing the lower flange 12, an annular fourth rolling groove 21 is provided at the bottom of the second mounting groove 14, and the pump body assembly also includes balls arranged between the third rolling groove 17 and the fourth rolling groove 21.

[0072] In this embodiment, a plurality of third rolling grooves 17 are provided on the end face of the lower rolling disk 7 facing the lower flange 12, and an annular fourth rolling groove 21 is provided at the bottom of the second mounting groove 14, wherein the third rolling groove 17 is a hemispherical groove, a cylindrical groove, a truncated cone groove or a prismatic groove, and the size of the groove needs to be adapted to the diameter of the roller to avoid the groove being too large, resulting in an excessive range of motion of the roller and an unstable support structure, and to avoid the groove being too small, resulting in excessive friction resistance between the groove and the roller, affecting the rolling fit effect.

[0073] In one embodiment, a sliding vane groove 19 is provided on the cylinder 4 , and the pump body assembly further includes a sliding vane 18 , which is slidably provided in the sliding vane groove 19 .

[0074] In one embodiment, avoidance grooves 20 are respectively provided on the upper and lower sides of the slide 18 . When the slide 18 moves to the maximum extension position, the edges of the avoidance grooves 20 are located radially outside the inner wall of the working chamber of the cylinder 4 .

[0075] When the first rolling groove 15 is provided on the end surface of the cylinder 4, the depth of the avoidance groove 20 needs to be equal to or slightly greater than the depth of the first rolling groove 15. At the same time, the length of the avoidance groove 20 needs to be sufficient to ensure that the rotation of the upper rolling plate 2 is not hindered during the movement of the slide 18 from the maximum extension position to the minimum extension position, that is, it does not interfere with the balls between the upper rolling plate 2 and the cylinder 4. Preferably, the length of the avoidance groove 20 should be greater than the sum of the movement distance of the slide 18 from the maximum extension position to the minimum extension position and the width of the first rolling groove 15.

[0076] In one embodiment, the arc head end edge of the avoidance groove 20 is t, and the distance to the center of the cylinder is Lt. The other end of the avoidance groove 20 is the tail end edge w, and the distance to the center of the cylinder is Lw. A first annular rolling groove 15 is provided on the end surface of the cylinder 4 facing the upper rolling disk 2. The maximum radius of the first rolling groove 15 is Rrmax, and the minimum radius is Rrmin, where f≤Rrmin-Lt≤g, f≤Lw-Rrmax≤g, 0.3mm≤f≤0.5mm, 0.6mm≤g≤0.8mm.

[0077] This structural restriction is mainly used to ensure that the rolling of the balls is not hindered when the upper rolling plate 2 rolls.

[0078] In one embodiment, crankshaft 1 includes a first portion located on a first side of upper rolling plate 2 and a second portion located on a second side of upper rolling plate 2. The inner diameter of roller 5 is r1, the diameter of the second portion is D2, and the eccentricity of roller 5 relative to upper rolling plate 2 is e, where D2 / 2 < r1-e. This constraint ensures that roller 5 and crankshaft 1 do not contact each other during operation of the pump assembly, preventing interference, reducing friction pairs, and lowering frictional power.

[0079] In one embodiment, the inner radius of the working chamber of the cylinder 4 is R, the outer diameter of the roller 5 is r2, and the eccentric distance of the roller 5 relative to the upper rolling plate 2 is e, Ra ≤ r2 + e + b ≤ R, where 0.01 mm ≤ a ≤ 0.03 mm, 0.01 mm ≤ b ≤ 0.02 mm, and b < a. As a preferred embodiment, a = 0.02 mm, and b = 0.015 mm.

[0080] The above-mentioned a and b are both fitting clearances, which can be changed accordingly according to the situation. On the one hand, this limitation ensures that there is a clearance fit between the roller 5 and the cylinder 4, so that the pump body assembly can realize the rotation function. On the other hand, it ensures the area of ​​the high and low pressure flow areas during the operation of the pump body assembly, avoiding the backflow of high-pressure gas caused by local large gaps.

[0081] In one embodiment, the length of the first and second sliders 9 and 10 is L, the inner radius of the working chamber of the cylinder 4 is R, and the eccentric distance of the roller 5 relative to the upper rolling plate 2 is e. L / 2 - e ≥ R + c, and 1.5 mm ≤ c ≤ 2.5 mm. Preferably, c = 2 mm. Here, c represents the clearance, which can be adjusted accordingly. This limitation allows the roller 5 to move freely within the chute, ensuring that the pump assembly can rotate.

[0082] In one embodiment, a first annular rolling groove 15 is provided on the end surface of the cylinder 4 facing the upper rolling disk 2, and a plurality of second rolling grooves 16 are provided on the end surface of the upper rolling disk 2 facing the cylinder 4 at circumferential intervals. The pump body assembly also includes a ball arranged between the first rolling groove 15 and the second rolling groove 16. The maximum radius of the first rolling groove 15 is Rrmax, the minimum radius is Rrmin, the length of the first slider 9 is L, the diameter of the ball is Dg, and the eccentric distance of the roller 5 relative to the upper rolling disk 2 is e, L / 2+e+d≤Rrmin<D / 2-Dg / 2, Rrmax>D / 2+Dg / 2, 1mm≤d≤2mm.

[0083] The above-mentioned d is the clearance, which can be changed accordingly depending on the situation. This limitation enables the upper rolling plate 2 and the lower rolling plate 7 to not only realize the rolling function, but also to roll within the required area to realize the sealing function.

[0084] In one embodiment, the crankshaft 1 and the upper rolling plate 2 are integrally formed.

[0085] In one embodiment, the crankshaft 1 and the upper rolling plate 2 are formed separately and connected via splines.

[0086] When the crankshaft 1 and the upper rolling plate 2 are formed separately, the crankshaft 1 and the upper rolling plate 2 can be processed separately, and spline teeth can be formed on the crankshaft 1, and spline grooves can be formed on the upper rolling plate 2. Then, a spline fit is formed between the crankshaft 1 and the upper rolling plate 2 to facilitate the transmission of torque between the crankshaft 1 and the upper rolling plate 2.

[0087] The crankshaft 1 and the upper rolling plate 2 are formed separately, which can reduce the processing difficulty of the overall structure.

[0088] According to an embodiment of the present invention, the compressor includes a pump body assembly, which is the pump body assembly described above.

[0089] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0090] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0091] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A pump assembly, characterized in that: include: Crankshaft (1); An upper rolling plate (2), the upper rolling plate (2) and the crankshaft (1) forming a synchronous rotation structure, the upper rolling plate (2) having a first sliding groove (3); A cylinder (4) having a working chamber; A roller (5) is rotatably mounted in the working chamber and is eccentrically positioned relative to the upper rolling plate (2). The roller (5) has a center hole (6). The crankshaft (1) is passed through the center hole (6). When the roller (5) rotates in the working chamber, the inner wall of the center hole (6) does not contact the crankshaft (1). A lower rolling plate (7) has a second chute (8) on a side facing the cylinder (4), wherein the first chute (3) and the second chute (8) intersect in an axial projection plane of the lower rolling plate (7), and the intersection of the first chute (3) and the second chute (8) is located on the central axis of the roller (5); A first slider (9) is provided on the side of the roller (5) that cooperates with the upper rolling disc (2), and a second slider (10) is provided on the side of the roller (5) that cooperates with the lower rolling disc (7). The first slider (9) can be slidably arranged in the first chute (3), and the second slider (10) can be slidably arranged in the second chute (8); the roller (5) realizes eccentric motion through the cooperation between the upper rolling disc (2) and the lower rolling disc (7).

2. The pump assembly according to claim 1, characterized in that The first sliding groove (3) and the second sliding groove (8) are perpendicular to each other.

3. The pump assembly according to claim 1, characterized in that The pump body assembly further comprises an upper flange (11) and a lower flange (12), wherein the upper flange (11) has a first mounting groove (13), and the lower flange (12) has a second mounting groove (14), wherein the upper rolling plate (2) is rotatably mounted in the first mounting groove (13), and the lower rolling plate (7) is rotatably mounted in the second mounting groove (14).

4. The pump assembly according to claim 3, characterized in that A rolling fit is formed between the support surface of the upper rolling disc (2) and the upper flange (11), and / or a rolling fit is formed between the support surface of the upper rolling disc (2) and the cylinder (4).

5. The pump assembly according to claim 4, characterized in that An annular first rolling groove (15) is provided on the end surface of the cylinder (4) facing the upper rolling plate (2), and a plurality of second rolling grooves (16) are provided at intervals in the circumferential direction on the end surface of the upper rolling plate (2) facing the cylinder (4). The pump body assembly further includes a ball disposed between the first rolling groove (15) and the second rolling groove (16).

6. The pump assembly according to claim 3, characterized in that A rolling fit is formed between the support surface of the lower rolling disc (7) and the lower flange (12), and / or a rolling fit is formed between the support surface of the lower rolling disc (7) and the cylinder (4).

7. The pump assembly according to claim 6, characterized in that A plurality of third rolling grooves (17) are provided on the end surface of the lower rolling plate (7) facing the lower flange (12), an annular fourth rolling groove (21) is provided at the bottom of the second mounting groove (14), and the pump body assembly further includes a ball disposed between the third rolling grooves (17) and the fourth rolling groove (21).

8. The pump assembly according to claim 1, characterized in that The cylinder (4) is provided with a slide groove (19), and the pump body assembly further comprises a slide (18), and the slide (18) is slidably provided in the slide groove (19).

9. The pump assembly according to claim 8, characterized in that Avoidance grooves (20) are respectively provided on the upper and lower sides of the slide (18); when the slide (18) moves to the maximum extension position, the edges of the avoidance grooves (20) are located radially outside the inner wall of the working chamber of the cylinder (4).

10. The pump assembly according to claim 9, characterized in that The arc head end edge of the avoidance groove (20) is t, and the distance to the center of the cylinder is Lt. The other end of the avoidance groove (20) is the tail end edge w, and the distance to the center of the cylinder is Lw. A first annular rolling groove (15) is provided on the end surface of the cylinder (4) facing the upper rolling disk (2). The maximum radius of the first rolling groove (15) is Rrmax, and the minimum radius is Rrmin, wherein df≤Rrmin-Lt≤g, f≤Lw-Rrmax≤g, 0.3mm≤f≤0.5mm, and 0.6mm≤g≤0.8mm.

11. The pump assembly according to any one of claims 1 to 10, characterized in that: The crankshaft (1) comprises a first portion located on a first side of the upper rolling disc (2) and a second portion located on a second side of the upper rolling disc (2), the inner diameter of the roller (5) is r1, the diameter of the second portion is D2, and the eccentric distance of the roller (5) relative to the upper rolling disc (2) is e, wherein D2 / 2<r1-e.

12. The pump assembly according to any one of claims 1 to 10, characterized in that: The inner radius of the working chamber of the cylinder (4) is R, the outer diameter of the roller (5) is r2, and the eccentric distance of the roller (5) relative to the upper rolling plate (2) is e, Ra≤r2+e+b≤R, wherein 0.01mm≤a≤0.03mm, 0.01mm≤b≤0.02mm, and b<a.

13. The pump assembly according to any one of claims 1 to 10, characterized in that: The lengths of the first slider (9) and the second slider (10) are L, the inner radius of the working chamber of the cylinder (4) is R, the eccentric distance of the roller (5) relative to the upper rolling disc (2) is e, L / 2-e≥R+c, 1.5mm≤c≤2.5mm.

14. The pump assembly according to claim 3, wherein: A first annular rolling groove (15) is provided on the end surface of the cylinder (4) facing the upper rolling disk (2), and a plurality of second rolling grooves (16) are provided on the end surface of the upper rolling disk (2) facing the cylinder (4) at intervals in the circumferential direction. The pump body assembly further comprises a ball disposed between the first rolling groove (15) and the second rolling groove (16), the maximum radius of the first rolling groove (15) is Rrmax, the minimum radius is Rrmin, the length of the first slider (9) is L, the diameter of the ball is Dg, and the eccentric distance of the roller (5) relative to the upper rolling disk (2) is e, L / 2+e+d≤Rrmin<D / 2- Dg / 2, Rrmax>D / 2+ Dg / 2, 1mm≤d≤2mm.

15. The pump assembly according to any one of claims 1 to 10, characterized in that: The crankshaft (1) and the upper rolling plate (2) are integrally formed; or the crankshaft (1) and the upper rolling plate (2) are separately formed and connected via a spline.

16. A compressor comprising a pump assembly, characterized in that: The pump body assembly is the pump body assembly according to any one of claims 1 to 15.

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