Pump body assembly, rotary cylinder pump and heat exchange equipment

Abstract

The utility model provides a pump body assembly, a rotary cylinder pump and heat exchange equipment, the pump body assembly comprises a rotating shaft, a cylinder sleeve and a piston assembly, the rotating shaft and the cylinder sleeve are eccentrically arranged, and the eccentric distance is fixed; the piston assembly is provided with a variable volume cavity and is rotatably arranged in the cylinder sleeve, and the rotating shaft is in driving connection with the piston assembly; a liquid suction port and a liquid discharge port are formed in the cylinder sleeve, the liquid suction port is communicated with the variable volume cavity, and the liquid discharge port is communicated with the variable volume cavity; a buffer groove is further formed in the cylinder sleeve, a liquid suction groove is formed in the inner wall face of the cylinder sleeve, the liquid suction groove is communicated with the liquid suction opening through the buffer groove, and the liquid suction groove extends by a second preset distance in the circumferential direction of the inner wall face of the cylinder sleeve so as to form an arc section with the section provided with two oppositely-arranged straight line sections and the ends connected with the two straight line sections. And a round angle C or an obtuse angle D is formed at the intersection of the liquid absorption tank and the buffer tank. The cylinder sleeve solves the problem that in the prior art, a sharp corner or a sharp edge exists at the intersection of the inlet buffer groove and the liquid suction groove of the cylinder sleeve.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange systems, in particular to a pump body component, a rotary cylinder pump and heat exchange equipment. Background Art

[0002] In data centers, computer room air conditioning and other fields, liquid pumps are usually used instead of compressors to drive the refrigerant to run in the air-conditioning system, and the energy efficiency is higher than that of conventional air-conditioning systems. The industry calls this system that uses a pump to drive the refrigerant a fluorine pump system, and the pump that drives the refrigerant is called a fluorine pump.

[0003] However, there are sharp corners or edges at the intersection of the inlet buffer groove and the liquid suction groove of the cylinder sleeve of the existing fluorine pump. Such sharp edges are prone to burrs and flanging after processing, and the wall of the edge is weak, which is easy to fall off and form impurities during long-term use. These defects are called "unsolved solutions to the sharp angles of the intersection line." Utility Model Content

[0004] The main purpose of the utility model is to provide a pump body assembly, a rotary cylinder pump and a heat exchange device to solve the problem of sharp corners or sharp edges at the intersection of the inlet buffer groove and the liquid suction groove of the cylinder sleeve in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a pump body assembly is provided, including a rotating shaft, a cylinder sleeve and a piston assembly, wherein the rotating shaft and the cylinder sleeve are eccentrically arranged and the eccentric distance is fixed; the piston assembly has a variable volume chamber, the piston assembly is rotatably arranged in the cylinder sleeve, and the rotating shaft is drivingly connected to the piston assembly to change the volume of the variable volume chamber; a suction port and a discharge port are arranged on the cylinder sleeve, the suction port is connected to the variable volume chamber and transports refrigerant into the variable volume chamber, and the discharge port is connected to the variable volume chamber and transports the variable volume chamber. The refrigerant in the accumulation chamber is discharged from the discharge port; wherein, a buffer groove is also provided on the cylinder liner, and the inner wall surface of the cylinder liner has a liquid suction groove, which is connected to the liquid suction port through the buffer groove, and the buffer groove extends a first preset distance along the circumference of the cylinder liner to form a buffer groove with an arc-shaped cross-section, and the liquid suction groove extends a second preset distance along the circumference of the inner wall surface of the cylinder liner to form a cross-section with two oppositely arranged straight line segments and an arc segment connecting the ends of the two straight line segments, so that the intersection between the liquid suction groove and the buffer groove forms a rounded corner C or an obtuse angle D.

[0006] Furthermore, the bending directions of the two arc segments in the radial direction of the cylinder liner are consistent.

[0007] Further, at least one end of the buffer groove passes through the axial end surface of the cylinder liner; or, both ends of the buffer groove do not pass through the axial end surface of the cylinder liner.

[0008] Furthermore, there are two liquid suction grooves, which are spaced apart along the axial direction of the cylinder sleeve, and both of the liquid suction grooves are connected to the buffer groove.

[0009] Furthermore, the height H of the connection between the two suction grooves in the axial direction of the cylinder sleeve is g5 The height H of the cylinder sleeve in its axial direction gt The ratio ranges from 0.1 to 0.3.

[0010] Furthermore, the height H of the connection between the upper groove wall surface of the upper suction groove and the upper end surface of the cylinder sleeve in the axial direction of the cylinder sleeve is g6 The height H of the cylinder sleeve in its axial direction gt The ratio ranges from 0.05 to 0.4.

[0011] Furthermore, the height H of the connection between the lower groove wall surface of the suction groove located below and the lower end surface of the cylinder sleeve in the axial direction of the cylinder sleeve is g7 The height H of the cylinder sleeve in its axial direction gt The ratio ranges from 0.05 to 0.4.

[0012] Furthermore, the rotating shaft is provided with two eccentric parts along its axial direction, and the piston assembly includes a piston sleeve and a piston. The piston sleeve is rotatably arranged in the cylinder sleeve, and the piston sleeve has two limiting channels, and the two limiting channels are arranged in sequence along the axial direction of the rotating shaft, and the extension direction of the limiting channels is perpendicular to the axial direction of the rotating shaft; the piston has a through hole, and there are two pistons. The two eccentric parts extend into the two through holes of the two pistons correspondingly, and the two pistons are correspondingly slidably arranged in the two limiting channels to form a variable volume chamber, and the variable volume chamber is located in the sliding direction of the piston. The rotating shaft rotates to drive the piston to slide back and forth in the limiting channel while interacting with the piston sleeve, so that the piston sleeve and the piston rotate in the cylinder sleeve.

[0013] Furthermore, the height H of the connection between the two suction grooves in the axial direction of the cylinder sleeve is g5 The height H of the connection between the two limiting channels in the axial direction of the piston sleeve q2 The ratio ranges from 0.9 to 3.

[0014] Furthermore, the height H of the connection between the two suction grooves in the axial direction of the cylinder sleeve is g5 The height H of the connection between the two limiting channels in the axial direction of the piston sleeve q2 The ratio ranges from 1.1 to 1.2.

[0015] Furthermore, there is a phase difference of a first angle A between the two eccentric portions, the eccentricities of the two eccentric portions are equal, and there is a phase difference of a second angle B between the extension directions of the two limiting channels, wherein the first angle A is twice the second angle B.

[0016] Furthermore, the two eccentric portions are arranged opposite to each other at an angle of 180°.

[0017] Furthermore, the width W of the suction groove g1 , the length of the channel wall of the limiting channel L qc Between: W g1 ≤L qc .

[0018] Furthermore, there are two drain ports, which are spaced apart along the axial direction of the cylinder sleeve, and the width W of the drain ports is g2 , Width W of the suction groove g1 Between: W g2 ≥W g1 .

[0019] Furthermore, the cross section of the liquid suction groove is square, and there is an inlet fillet R between two adjacent groove wall contour lines of the square liquid suction groove. j1 , the inlet height of the suction groove on the cylinder sleeve is H c1 , where the inlet fillet R j1 With inlet height H c1 Between: R j1 <1 / 2H c1 .

[0020] Furthermore, the cross section of the liquid suction groove is square, and there is an inlet fillet R between two adjacent groove wall contour lines of the square liquid suction groove. j1 , the inlet width of the suction trough is W g1 , where the inlet fillet R j1 With inlet width W g1 Between: R j1 <1 / 2W g1 .

[0021] Furthermore, the cross section of the liquid suction groove is square, and there is an inlet fillet R between two adjacent groove wall contour lines of the square liquid suction groove. j1 The hole cross section of the discharge port is square, and there is an outlet fillet R between the edge contour lines of two adjacent holes of the square discharge port. c1 ; Among them, the inlet fillet R j1 With outlet fillet R c1 Between: R j1 ≥R c1 .

[0022] Furthermore, there are two drainage ports, which are spaced apart in the axial direction of the cylinder liner, and neither of the two drainage ports penetrates the axial end surface of the cylinder liner; there are two suction grooves, which are spaced apart in the axial direction of the cylinder liner; the height H of the connection between the upper groove wall surface of the upper drainage port and the upper end surface of the cylinder liner in the axial direction of the cylinder liner is g2 , the height H of the connection between the upper groove wall surface of the upper suction groove and the upper end surface of the cylinder sleeve in the axial direction of the cylinder sleeve g6Between: H g2 ≤H g6 .

[0023] Furthermore, there are two drainage ports, which are spaced apart along the axial direction of the cylinder liner, and neither of the two drainage ports penetrates the axial end surface of the cylinder liner; there are two suction grooves, which are spaced apart along the axial direction of the cylinder liner; the height H of the connection between the lower groove wall surface of the drainage port located below and the lower end surface of the cylinder liner in the axial direction of the cylinder liner is g1 , the height H of the connection between the lower groove wall surface of the suction groove located below and the lower end surface of the cylinder sleeve in the axial direction of the cylinder sleeve g7 Between: H g1 ≤H g7 .

[0024] Furthermore, there are two drainage ports, which are spaced apart along the axial direction of the cylinder liner, and neither of the two drainage ports penetrates the axial end surface of the cylinder liner; there are two suction grooves, which are spaced apart along the axial direction of the cylinder liner; the distance H between the lower groove wall surface of the upper drainage port and the upper end surface of the cylinder liner is g3 , the distance H between the lower wall of the upper suction groove and the upper end surface of the cylinder sleeve g8 Between: H g3 ≥H g8 .

[0025] Furthermore, there are two drainage ports, which are spaced apart along the axial direction of the cylinder liner, and neither of the two drainage ports penetrates the axial end surface of the cylinder liner; there are two suction grooves, which are spaced apart along the axial direction of the cylinder liner; the distance H between the upper groove wall surface of the drainage port located at the bottom and the lower end surface of the cylinder liner is g4 , the distance H between the upper wall of the suction groove located below and the lower end surface of the cylinder sleeve g9 Between: H g4 ≥H g9 .

[0026] Furthermore, there are two drainage ports, which are spaced apart in the axial direction of the cylinder liner, and the two drainage ports respectively penetrate the end surfaces of the cylinder liner at both ends of the axial direction; there are two suction grooves, which are spaced apart in the axial direction of the cylinder liner; the depth H of the upper drainage port in the axial direction of the cylinder liner is g11 , the distance H between the lower wall of the upper suction groove and the upper end surface of the cylinder sleeve g8 Between: H g11 ≥H g8 .

[0027] Furthermore, there are two drainage ports, which are spaced apart in the axial direction of the cylinder liner, and the two drainage ports respectively penetrate the end surfaces of the cylinder liner at both ends of the axial direction; there are two suction grooves, which are spaced apart in the axial direction of the cylinder liner; the depth H of the drainage port located at the bottom in the axial direction of the cylinder liner isg12 , the distance H between the upper wall of the suction groove located below and the lower end surface of the cylinder sleeve g9 Between: H g12 ≥H g9 .

[0028] According to another aspect of the utility model, a rotary cylinder pump is provided, comprising a pump body assembly, and the pump body assembly is the above-mentioned pump body assembly.

[0029] According to another aspect of the utility model, a heat exchange device is provided, including a rotary cylinder pump, and the rotary cylinder pump is the rotary cylinder pump mentioned above.

[0030] By applying the technical solution of the utility model, the buffer groove is extended by a first preset distance along the circumference of the cylinder liner to form a buffer groove with an arc-shaped cross-section, and the liquid suction groove is extended by a second preset distance along the circumference of the inner wall surface of the cylinder liner, thereby forming a cross-section with two oppositely arranged straight line segments and an arc segment connecting the ends of the two straight line segments. In this way, a fillet C or an obtuse angle D is formed at the intersection between the liquid suction groove and the buffer groove, so that the processed cylinder liner is not prone to burrs and flanging, and the wall surface at the edge is relatively thick, ensuring that the subsequent cylinder liner is not prone to falling off and forming impurities during long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0032] Figure 1 A schematic structural diagram of a cylinder sleeve of a pump assembly according to the first embodiment of the utility model is shown;

[0033] Figure 2 Shows Figure 1 A schematic diagram of the structure of the liquid suction port side of the cylinder sleeve of the pump body assembly in FIG. 1 , in which the arrow E indicates the inflow direction of the refrigerant;

[0034] Figure 3 Shows Figure 1 A schematic diagram of the cross-sectional structure of the cylinder liner;

[0035] Figure 4 Shows Figure 3 A partial cross-sectional structural diagram of a cylinder liner;

[0036] Figure 5 Shows Figure 1 A schematic diagram of the top view of the cylinder sleeve of the pump assembly in FIG. 1 , in which the shaded portion is a schematic diagram of the state when the refrigerant flows into the suction port;

[0037] Figure 6 Shows Figure 1 A schematic diagram of the top view of the cylinder sleeve of the pump assembly in FIG. 1 , in which the shaded portion is a schematic diagram of the state when the refrigerant flows into the buffer tank;

[0038] Figure 7 Shows Figure 1 A schematic diagram of the top view of the cylinder sleeve of the pump assembly in FIG. 1 , in which the shaded portion is a schematic diagram of the state when the refrigerant flows into the suction groove;

[0039] Figure 8 Shows Figure 1 A schematic diagram of a partial top view of the cylinder sleeve of the pump assembly in the figure, in which the shaded part is a schematic diagram of the state when the refrigerant flows into the buffer tank and the suction tank, and the intersection of the buffer tank and the suction tank is an obtuse angle D;

[0040] Fig. 9 Shows Figure 1 A comparison diagram of the intersection of the buffer groove and the liquid suction groove of the cylinder sleeve of the pump body assembly, wherein the intersection of the buffer groove and the liquid suction groove in Figure a and Figure b is an acute angle D', and the intersection of the buffer groove and the liquid suction groove in Figure c is an obtuse angle D;

[0041] Fig.10 Shows Figure 1 A schematic structural diagram of the discharge port side of the cylinder sleeve of the pump body assembly;

[0042] Fig.11 Shows Fig.10 A schematic diagram of the structure of the cylinder sleeve from a top view;

[0043] Fig.12 Shows Fig.11 Schematic diagram of the cross-sectional structure from the FF perspective;

[0044] Fig.13 Shows Fig.12 Schematic diagram of the size structure of the cylinder liner;

[0045] Fig.14 Shows Fig.12 A schematic diagram of the size structure of the liquid suction groove of the cylinder sleeve;

[0046] Fig.15 Shows Fig.11 Schematic diagram of the cross-sectional structure from the GG perspective;

[0047] Fig.16 Shows Fig.15 Schematic diagram of the size structure of the cylinder liner;

[0048] Fig.17 Shows Fig.15 A schematic diagram of the size structure of the discharge port of the cylinder liner;

[0049] Fig.18 A schematic structural diagram of a cylinder sleeve of a pump assembly according to a second embodiment of the present utility model is shown;

[0050] Fig.19 Shows Fig.18 A schematic diagram of the structure of the cylinder sleeve from a top view;

[0051] Fig. 20 Shows Fig.19 A schematic diagram of a cross-sectional structure from the UU perspective;

[0052] Fig.21 Shows Fig. 20 Schematic diagram of the size structure of the cylinder liner;

[0053] Fig. 22 Shows Fig. 20 A schematic diagram of the size structure of the discharge port of the cylinder liner;

[0054] Fig.23 Shows Fig.18 A schematic diagram of the size structure of the liquid suction groove of the cylinder sleeve;

[0055] Fig.24 A schematic structural diagram of a piston sleeve of a pump body assembly according to an optional embodiment of the utility model is shown;

[0056] Fig.25 Shows Fig.24 A schematic cross-sectional structure diagram of the piston sleeve at a ZZ perspective;

[0057] Fig.26 Shows Fig.24 A schematic diagram of the structure of the piston sleeve in a top view;

[0058] Fig. 27 Shows Figure 1 A schematic structural diagram of the pump assembly of the first embodiment;

[0059] Fig.28 Shows Fig. 27 Schematic diagram of the exploded structure of the pump assembly;

[0060] Fig.29 Shows Fig. 27 A schematic cross-sectional view of the pump assembly;

[0061] Fig.30 Shows Fig.29 A schematic structural diagram of the pump assembly from another perspective;

[0062] Fig.31 Shows Fig.18 A schematic structural diagram of a pump assembly according to Embodiment 2;

[0063] Fig.32 Shows Fig.31 A schematic cross-sectional view of the pump assembly;

[0064] Fig.33 Shows Fig.31 A schematic cross-sectional view of the pump assembly;

[0065] Fig.34 Shows Fig.33 A schematic cross-sectional view of the pump assembly from another perspective.

[0066] The above drawings include the following reference numerals:

[0067] 10. Rotating shaft; 11. Eccentric part;

[0068] 20. Cylinder sleeve; 21. Liquid suction port; 22. Liquid discharge port; 23. Buffer tank; 24. Liquid suction tank;

[0069] 30. Piston assembly; 31. Piston sleeve; 311. Position limiting channel; 32. Piston; 321. Through hole;

[0070] 41. Upper flange; 42. Lower flange. DETAILED DESCRIPTION

[0071] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0072] In order to solve the problem of sharp corners or sharp edges at the intersection of the inlet buffer groove and the liquid suction groove of the cylinder liner in the prior art, the utility model provides a pump body assembly, a rotary cylinder pump and a heat exchange device, wherein the rotary cylinder pump includes a pump body assembly, the pump body assembly is the above-mentioned and below-mentioned pump body assembly, and the heat exchange device includes a rotary cylinder pump, and the rotary cylinder pump is the above-mentioned rotary cylinder pump.

[0073] Embodiment 1

[0074] like Figures 1 to 17 , Figures 27 to 30As shown, the pump body assembly includes a rotating shaft 10, a cylinder sleeve 20 and a piston assembly 30, wherein the rotating shaft 10 and the cylinder sleeve 20 are eccentrically arranged and the eccentric distance is fixed; the piston assembly 30 has a variable volume chamber, the piston assembly 30 is rotatably arranged in the cylinder sleeve 20, and the rotating shaft 10 is drivingly connected with the piston assembly 30 to change the volume of the variable volume chamber; the cylinder sleeve 20 is provided with a suction port 21 and a discharge port 22, the suction port 21 is connected with the variable volume chamber and conveys the refrigerant into the variable volume chamber, and the discharge port 22 is connected with the variable volume chamber and discharges the refrigerant in the variable volume chamber from the discharge port 22 Discharge; wherein, a buffer groove 23 is also provided on the cylinder liner 20, and the inner wall surface of the cylinder liner 20 has a liquid suction groove 24, and the liquid suction groove 24 is connected with the liquid suction port 21 through the buffer groove 23, and the buffer groove 23 extends a first preset distance along the circumference of the cylinder liner 20 to form a buffer groove 23 with an arc-shaped cross section, and the liquid suction groove 24 extends a second preset distance along the circumference of the inner wall surface of the cylinder liner 20 to form a cross section with two oppositely arranged straight line segments and an arc segment connecting the ends of the two straight line segments, so that the intersection between the liquid suction groove 24 and the buffer groove 23 forms a fillet C or an obtuse angle D.

[0075] The buffer groove 23 is extended by a first preset distance along the circumference of the cylinder liner 20 to form a buffer groove 23 with an arc-shaped cross-section, and the liquid suction groove 24 is extended by a second preset distance along the circumference of the inner wall surface of the cylinder liner 20, thereby forming a cross-section having two oppositely arranged straight line segments and an arc segment connecting the ends of the two straight line segments. In this way, a fillet C or an obtuse angle D is formed at the intersection between the liquid suction groove 24 and the buffer groove 23, so that the processed cylinder liner is not prone to burrs and flanging, and the wall surface at the edge is relatively thick, ensuring that the subsequent cylinder liner is not prone to falling off and forming impurities during long-term use.

[0076] It should be noted that, in this embodiment, the bending directions of the two arc segments in the radial direction of the cylinder sleeve 20 are consistent.

[0077] It should be noted that, in this embodiment, the drain port 22 of the cylinder sleeve 20 is a closed structure.

[0078] Optionally, at least one end of the buffer groove 23 passes through the axial end surface of the cylinder liner 20 ; or, both ends of the buffer groove 23 do not pass through the axial end surface of the cylinder liner 20 .

[0079] It should be noted that, in the present embodiment, there are two liquid suction grooves 24 , which are spaced apart from each other along the axial direction of the cylinder sleeve 20 , and both of the two liquid suction grooves 24 are connected to the buffer groove 23 .

[0080] like Figure 2 As shown, arrow E indicates the direction in which the refrigerant flows into the cylinder liner 20 .

[0081] like Fig. 9As shown, the liquid suction groove without solving the intersection line sharp angle is composed of 4 arc curves, and according to the diameter of the arcs at both ends of the arc hole of the buffer groove 23, the scheme is divided into two forms. Fig. 9 In (a), there is a structural weakness. The angle formed by the intersection of the buffer groove 23 and the liquid suction groove 24 in Figure (a) is a larger acute angle D' (compared with Figure (b)). Figure (b) has no structural weakness, but the acute angle D' formed at the intersection of the buffer groove 23 and the liquid suction groove 24 in Figure (b) is sharper than the acute angle D' in Figure (a), which makes it easier to produce burrs and flanging during the processing, and it is more difficult to clean the burrs and flanging. Even after cleaning, new burrs and flanging may fall off during operation, which is detrimental to the operation of the parts.

[0082] Combination Figure 8 and Fig. 9 The liquid suction groove 24 that solves the sharp angle of the intersecting line is composed of 2 curved lines (arc segments) and 2 straight edges (straight line segments). For the solution that solves the sharp angle of the intersecting line, the intersection of the buffer groove 23 and the liquid suction groove 24 forms an obtuse angle D (in sharp contrast to the acute angle D' of the solution that does not solve the sharp angle of the intersecting line), so the processing process is less likely to produce burrs and flanging, and the difficulty of cleaning burrs and flanging is small. After cleaning, no new burrs or flanging will fall off during operation.

[0083] like Fig.13 and Fig.16 As shown, the height H of the connection between the two suction grooves 24 in the axial direction of the cylinder sleeve 20 is g5 The height H of the cylinder liner 20 in the axial direction gt The ratio ranges from 0.1 to 0.3.

[0084] like Fig.13 and Fig.16 As shown, the letter K represents the upper end surface of the cylinder liner 20, the letter P represents the lower end surface of the cylinder liner 20, and the height H of the connection between the upper groove wall surface of the upper suction groove 24 and the upper end surface of the cylinder liner 20 in the axial direction of the cylinder liner 20 is g6 The height H of the cylinder liner 20 in the axial direction gt The ratio ranges from 0.05 to 0.4.

[0085] like Fig.13 and Fig.16 As shown, the letter K represents the upper end surface of the cylinder liner 20, the letter P represents the lower end surface of the cylinder liner 20, and the height H of the connection between the lower groove wall surface of the suction groove 24 located below and the lower end surface of the cylinder liner 20 in the axial direction of the cylinder liner 20 is g7 The height H of the cylinder liner 20 in the axial direction gt The ratio ranges from 0.05 to 0.4.

[0086] It should be noted that, in this embodiment, Figure 24 to Figure 26 As shown, the rotating shaft 10 is provided with two eccentric parts 11 along its axial direction, and the piston assembly 30 includes a piston sleeve 31 and a piston 32, wherein the piston sleeve 31 is rotatably arranged in the cylinder sleeve 20, and the piston sleeve 31 has two limiting channels 311, and the two limiting channels 311 are sequentially arranged along the axial direction of the rotating shaft 10, and the extension direction of the limiting channels 311 is perpendicular to the axial direction of the rotating shaft 10; the piston 32 has a through hole 321, and there are two pistons 32. The two eccentric parts 11 correspondingly extend into the two through holes 321 of the two pistons 32, and the two pistons 32 are correspondingly slidably arranged in the two limiting channels 311 and form a variable volume chamber, and the variable volume chamber is located in the sliding direction of the piston 32. The rotating shaft 10 rotates to drive the piston 32 to slide back and forth in the limiting channel 311 while interacting with the piston sleeve 31, so that the piston sleeve 31 and the piston 32 rotate in the cylinder sleeve 20.

[0087] Furthermore, there is a phase difference of a first angle A between the two eccentric portions 11 , the eccentricities of the two eccentric portions 11 are equal, and there is a phase difference of a second angle B between the extension directions of the two limiting channels 311 , wherein the first angle A is twice the second angle B.

[0088] Preferably, the two eccentric portions 11 are arranged opposite to each other at an angle of 180°.

[0089] It should be noted that in this embodiment, considering the structural stability of the pump body assembly, not easy to deform, and ensuring that the flow area of ​​the inlet and outlet is large enough and the flow is smooth enough, Fig.13 and Fig.25 As shown, the height H of the connection between the two suction grooves 24 in the axial direction of the cylinder sleeve 20 is g5 The height H of the connection between the two limiting channels 311 in the axial direction of the piston sleeve 31 q2 The ratio ranges from 0.9 to 3.

[0090] Preferably, the height H of the connection between the two suction grooves 24 in the axial direction of the cylinder sleeve 20 is g5 The height H of the connection between the two limiting channels 311 in the axial direction of the piston sleeve 31 q2 The ratio ranges from 1.1 to 1.2.

[0091] like Fig.13 and Fig.26 As shown, the width W of the liquid suction groove 24 is g1 , the length L of the channel wall of the limiting channel 311 qc Between: W g1 ≤L qc .

[0092] like Fig.13and Fig.16 As shown, there are two drain ports 22, which are spaced apart along the axial direction of the cylinder sleeve 20, and the width W of the drain ports 22 is g2 , the width W of the liquid suction groove 24 g1 Between: W g2 ≥W g1 .

[0093] like Fig.14 As shown, the cross section of the liquid suction groove 24 is square, and there is an inlet fillet R between two adjacent groove wall contour lines of the square liquid suction groove 24. j1 , the inlet height H of the suction groove 24 on the cylinder sleeve 20 c1 , where the inlet fillet R j1 With inlet height H c1 Between: R j1 <1 / 2H c1 .

[0094] like Fig.14 As shown, the cross section of the liquid suction groove 24 is square, and there is an inlet fillet R between two adjacent groove wall contour lines of the square liquid suction groove 24. j1 , the inlet width W of the suction groove 24 g1 , where the inlet fillet R j1 With inlet width W g1 Between: R j1 <1 / 2W g1 .

[0095] like Fig.14 and Fig.17 As shown, the cross section of the liquid suction groove 24 is square, and there is an inlet fillet R between two adjacent groove wall contour lines of the square liquid suction groove 24. j1 The hole cross section of the discharge port 22 is square, and there is an outlet fillet R between the two adjacent hole edge contour lines of the square discharge port 22. c1 ; Among them, the inlet fillet R j1 With outlet fillet R c1 Between: R j1 ≥R c1 .

[0096] like Fig.13 and Fig.16 As shown, the letter K represents the upper end surface of the cylinder liner 20, the letter P represents the lower end surface of the cylinder liner 20, there are two drain ports 22, the two drain ports 22 are arranged at intervals along the axial direction of the cylinder liner 20, and the two drain ports 22 do not penetrate the axial end surface of the cylinder liner 20; there are two suction grooves 24, the two suction grooves 24 are arranged at intervals along the axial direction of the cylinder liner 20; the height H of the connection between the upper groove wall surface of the upper drain port 22 and the upper end surface of the cylinder liner 20 in the axial direction of the cylinder liner 20g2 , the height H of the connection between the upper groove wall surface of the upper suction groove 24 and the upper end surface of the cylinder sleeve 20 in the axial direction of the cylinder sleeve 20 g6 Between: H g2 ≤H g6 .

[0097] like Fig.13 and Fig.16 As shown, letter K represents the upper end face of the cylinder liner 20, letter P represents the lower end face of the cylinder liner 20, there are two drain ports 22, the two drain ports 22 are arranged at intervals along the axial direction of the cylinder liner 20, and the two drain ports 22 do not penetrate the axial end face of the cylinder liner 20; there are two suction grooves 24, the two suction grooves 24 are arranged at intervals along the axial direction of the cylinder liner 20; the height H of the connection between the lower groove wall surface of the drain port 22 located at the bottom and the lower end face of the cylinder liner 20 in the axial direction of the cylinder liner 20 g1 , the height H of the connection between the lower groove wall surface of the suction groove 24 located below and the lower end surface of the cylinder sleeve 20 in the axial direction of the cylinder sleeve 20 g7 Between: H g1 ≤H g7 .

[0098] like Fig.13 and Fig.16 As shown, the letter K represents the upper end surface of the cylinder liner 20, the letter P represents the lower end surface of the cylinder liner 20, there are two drain ports 22, the two drain ports 22 are arranged at intervals along the axial direction of the cylinder liner 20, and the two drain ports 22 do not penetrate the axial end surface of the cylinder liner 20; there are two suction grooves 24, the two suction grooves 24 are arranged at intervals along the axial direction of the cylinder liner 20; the distance H between the lower groove wall surface of the upper drain port 22 and the upper end surface of the cylinder liner 20 g3 , the distance H between the lower groove wall surface of the upper suction groove 24 and the upper end surface of the cylinder sleeve 20 g8 Between: H g3 ≥H g8 .

[0099] like Fig.13 and Fig.16 As shown, letter K represents the upper end surface of the cylinder liner 20, letter P represents the lower end surface of the cylinder liner 20, there are two drain ports 22, the two drain ports 22 are arranged at intervals along the axial direction of the cylinder liner 20, and the two drain ports 22 do not penetrate the axial end surface of the cylinder liner 20; there are two suction grooves 24, the two suction grooves 24 are arranged at intervals along the axial direction of the cylinder liner 20; the distance H between the upper groove wall surface of the drain port 22 located at the bottom and the lower end surface of the cylinder liner 20 g4 , the distance H between the upper groove wall surface of the suction groove 24 located below and the lower end surface of the cylinder sleeve 20 g9 Between: H g4 ≥H g9 .

[0100] Embodiment 2

[0101] It should be noted that, in this embodiment, the difference from the first embodiment is that Figures 18 to 23 , Figure 31 to Figure 34 As shown, the liquid discharge port of the cylinder sleeve 20 in this embodiment is in an open form, and considering that one side of the liquid suction groove 24 in this embodiment is consistent with one side of the liquid suction groove 24 in the first embodiment, it will not be described in detail here.

[0102] like Fig.13 and Fig.21 As shown, letter K represents the upper end surface of the cylinder liner 20, letter P represents the lower end surface of the cylinder liner 20, there are two drain ports 22, the two drain ports 22 are arranged at intervals along the axial direction of the cylinder liner 20, and the two drain ports 22 respectively penetrate the end surfaces of the cylinder liner 20 at both ends of the axial direction; there are two suction grooves 24, the two suction grooves 24 are arranged at intervals along the axial direction of the cylinder liner 20; the depth H of the upper drain port 22 in the axial direction of the cylinder liner 20 g11 , the distance H between the lower groove wall surface of the upper suction groove 24 and the upper end surface of the cylinder sleeve 20 g8 Between: H g11 ≥H g8 .

[0103] like Fig.13 and Fig.21 As shown, letter K represents the upper end surface of the cylinder liner 20, letter P represents the lower end surface of the cylinder liner 20, there are two drain ports 22, the two drain ports 22 are arranged at intervals along the axial direction of the cylinder liner 20, and the two drain ports 22 respectively penetrate the end surfaces of the cylinder liner 20 at both ends of the axial direction; there are two suction grooves 24, the two suction grooves 24 are arranged at intervals along the axial direction of the cylinder liner 20; the depth H of the drain port 22 located at the bottom in the axial direction of the cylinder liner 20 g12 , the distance H between the upper groove wall surface of the suction groove 24 located below and the lower end surface of the cylinder sleeve 20 g9 Between: H g12 ≥H g9 .

[0104] like Fig.14 and Fig. 22 As shown, the cross section of the liquid suction groove 24 is square, and there is an inlet fillet R between two adjacent groove wall contour lines of the square liquid suction groove 24. j1 The hole cross section of the discharge port 22 is square, and there is an outlet fillet R between the two adjacent hole edge contour lines of the square discharge port 22. c1 ; Among them, the inlet fillet R j1 With outlet fillet R c1 Between: R j1 ≥R c1 .

[0105] like Fig. 22 and Fig.23 As shown, for the four inlet fillets (i.e. Fig.23 The fillet radius is R j1 Must be greater than or equal to the exit fillet radius R c1 .

[0106] like Figures 27 to 34 As shown, the pump body assembly includes an upper flange 41 and a lower flange 42 , and the upper flange 41 and the lower flange 42 are respectively arranged at two axial ends of the cylinder sleeve 20 .

[0107] 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, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0108] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0109] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0110] 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, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0111] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0112] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pump assembly, characterized in that: include: A rotating shaft (10); The cylinder sleeve (20), the rotating shaft (10) and the cylinder sleeve (20) are eccentrically arranged with a fixed eccentric distance; A piston assembly (30), the piston assembly (30) having a variable volume chamber, the piston assembly (30) being rotatably disposed in the cylinder sleeve (20), and the rotating shaft (10) being drivingly connected to the piston assembly (30) to change the volume of the variable volume chamber; The cylinder sleeve (20) is provided with a liquid suction port (21) and a liquid discharge port (22), wherein the liquid suction port (21) is communicated with the variable volume chamber and transports refrigerant into the variable volume chamber, and the liquid discharge port (22) is communicated with the variable volume chamber and discharges the refrigerant in the variable volume chamber through the liquid discharge port (22); The cylinder sleeve (20) is further provided with a buffer groove (23), the inner wall surface of the cylinder sleeve (20) has a liquid suction groove (24), the liquid suction groove (24) is connected with the liquid suction port (21) through the buffer groove (23), the buffer groove (23) extends a first preset distance along the circumference of the cylinder sleeve (20) to form a buffer groove (23) with an arc-shaped cross section, and the liquid suction groove (24) extends a second preset distance along the circumference of the inner wall surface of the cylinder sleeve (20) to form a cross section with two oppositely arranged straight line segments and an arc segment connecting the ends of the two straight line segments, so that the intersection between the liquid suction groove (24) and the buffer groove (23) forms a rounded corner C or an obtuse angle D.

2. The pump assembly according to claim 1, characterized in that: The bending directions of the two arc segments in the radial direction of the cylinder sleeve (20) are consistent.

3. The pump assembly according to claim 1, characterized in that: At least one end of the buffer groove (23) passes through the axial end surface of the cylinder sleeve (20); or, Both ends of the buffer groove (23) do not penetrate the axial end surface of the cylinder sleeve (20).

4. The pump assembly according to claim 1, characterized in that: There are two liquid suction grooves (24), which are spaced apart along the axial direction of the cylinder sleeve (20), and both of the liquid suction grooves (24) are connected to the buffer groove (23).

5. The pump assembly according to claim 4, characterized in that: The height H of the connection between the two liquid suction grooves (24) in the axial direction of the cylinder sleeve (20) is g5 The height H of the cylinder sleeve (20) in the axial direction gt The ratio ranges from 0.1 to 0.

3.

6. The pump assembly according to claim 4, characterized in that: The height H of the connection between the upper groove wall surface of the upper suction groove (24) and the upper end surface of the cylinder sleeve (20) in the axial direction of the cylinder sleeve (20) is g6 The height H of the cylinder sleeve (20) in the axial direction gt The ratio ranges from 0.05 to 0.

4.

7. The pump assembly according to claim 4, characterized in that: The height H of the connection between the lower groove wall surface of the suction groove (24) located below and the lower end surface of the cylinder sleeve (20) in the axial direction of the cylinder sleeve (20) is g7 The height H of the cylinder sleeve (20) in the axial direction gt The ratio ranges from 0.05 to 0.

4.

8. The pump assembly according to any one of claims 1 to 7, characterized in that: The rotating shaft (10) is provided with two eccentric parts (11) along its axial direction, and the piston assembly (30) comprises: A piston sleeve (31), the piston sleeve (31) being rotatably disposed in the cylinder sleeve (20), the piston sleeve (31) having two limiting channels (311), the two limiting channels (311) being sequentially disposed along the axial direction of the rotating shaft (10), and the extending direction of the limiting channels (311) being perpendicular to the axial direction of the rotating shaft (10); A piston (32), wherein the piston (32) has a through hole (321), there are two pistons (32), the two eccentric parts (11) extend into the two through holes (321) of the two pistons (32) respectively, the two pistons (32) are slidably arranged in the two limiting channels (311) respectively and form the variable volume chamber, the variable volume chamber is located in the sliding direction of the piston (32), the rotating shaft (10) rotates to drive the piston (32) to slide back and forth in the limiting channel (311) and interacts with the piston sleeve (31) so that the piston sleeve (31) and the piston (32) rotate in the cylinder sleeve (20).

9. The pump assembly according to claim 8, characterized in that: The height H of the connection between the two liquid suction grooves (24) in the axial direction of the cylinder sleeve (20) is g5 The height H of the connection between the two limiting channels (311) in the axial direction of the piston sleeve (31) is q2 The ratio ranges from 0.9 to 3.

10. The pump assembly according to claim 9, characterized in that: The height H of the connection between the two liquid suction grooves (24) in the axial direction of the cylinder sleeve (20) is g5 The height H of the connection between the two limiting channels (311) in the axial direction of the piston sleeve (31) is q2 The ratio ranges from 1.1 to 1.

2.

11. The pump assembly according to claim 8, characterized in that: There is a phase difference of a first angle A between the two eccentric portions (11), the eccentricity of the two eccentric portions (11) is equal, and there is a phase difference of a second angle B between the extension directions of the two limiting channels (311), wherein the first angle A is twice the second angle B.

12. The pump assembly according to claim 11, characterized in that The two eccentric parts (11) are arranged opposite to each other at an angle of 180 degrees.

13. The pump assembly according to claim 8, characterized in that The width W of the liquid suction groove (24) g1 , the length L of the channel wall of the limiting channel (311) qc Between: W g1 ≤L qc .

14. The pump assembly according to claim 1, characterized in that There are two drainage ports (22), which are spaced apart along the axial direction of the cylinder sleeve (20), and the width W of the drainage ports (22) is g2 , the width W of the liquid suction groove (24) g1 Between: W g2 ≥W g1 .

15. The pump assembly according to claim 1, characterized in that The cross section of the liquid suction groove (24) is square, and there is an inlet fillet R between two adjacent groove wall contour lines of the square liquid suction groove (24). j1 The inlet height H of the liquid suction groove (24) on the cylinder sleeve (20) is c1 , wherein the inlet fillet R j1 With the inlet height H c1 Between: R j1 <1 / 2H c1 .

16. The pump assembly according to claim 1, characterized in that The cross section of the liquid suction groove (24) is square, and there is an inlet fillet R between two adjacent groove wall contour lines of the square liquid suction groove (24). j1 The inlet width W of the liquid suction groove (24) is g1 , wherein the inlet fillet R j1 With the inlet width W g1 Between: R j1 <1 / 2W g1 .

17. The pump assembly according to claim 1, characterized in that The cross section of the liquid suction groove (24) is square, and there is an inlet fillet R between two adjacent groove wall contour lines of the square liquid suction groove (24). j1 ; The hole cross section of the drainage port (22) is square, and there is an outlet fillet R between two adjacent hole edge contour lines of the square drainage port (22). c1 ; Among them, the inlet fillet R j1 With the outlet radius R c1 Between: R j1 ≥R c1 .

18. The pump assembly according to claim 1, characterized in that There are two drainage ports (22), the two drainage ports (22) are arranged at intervals along the axial direction of the cylinder sleeve (20), and neither of the two drainage ports (22) penetrates the axial end surface of the cylinder sleeve (20); There are two liquid suction grooves (24), and the two liquid suction grooves (24) are arranged at intervals along the axial direction of the cylinder sleeve (20); The height H of the connection between the upper groove wall surface of the drainage port (22) located above and the upper end surface of the cylinder sleeve (20) in the axial direction of the cylinder sleeve (20) is g2 , the height H of the connection between the upper groove wall surface of the upper suction groove (24) and the upper end surface of the cylinder sleeve (20) in the axial direction of the cylinder sleeve (20) g6 Between: H g2 ≤H g6 .

19. The pump assembly according to claim 1, characterized in that There are two drainage ports (22), the two drainage ports (22) are arranged at intervals along the axial direction of the cylinder sleeve (20), and neither of the two drainage ports (22) penetrates the axial end surface of the cylinder sleeve (20); There are two liquid suction grooves (24), and the two liquid suction grooves (24) are arranged at intervals along the axial direction of the cylinder sleeve (20); The height H of the connection between the lower groove wall surface of the drain port (22) located below and the lower end surface of the cylinder sleeve (20) in the axial direction of the cylinder sleeve (20) is g1 , the height H of the connection between the lower groove wall surface of the suction groove (24) located below and the lower end surface of the cylinder sleeve (20) in the axial direction of the cylinder sleeve (20) g7 Between: H g1 ≤H g7 .

20. The pump assembly according to claim 1, characterized in that There are two drainage ports (22), the two drainage ports (22) are arranged at intervals along the axial direction of the cylinder sleeve (20), and neither of the two drainage ports (22) penetrates the axial end surface of the cylinder sleeve (20); There are two liquid suction grooves (24), and the two liquid suction grooves (24) are arranged at intervals along the axial direction of the cylinder sleeve (20); The distance H between the lower groove wall surface of the drainage port (22) located above and the upper end surface of the cylinder sleeve (20) is g3 , the distance H between the lower groove wall surface of the liquid suction groove (24) located above and the upper end surface of the cylinder sleeve (20) g8 Between: H g3 ≥H g8 .

21. The pump assembly according to claim 1, characterized in that There are two drainage ports (22), the two drainage ports (22) are arranged at intervals along the axial direction of the cylinder sleeve (20), and neither of the two drainage ports (22) penetrates the axial end surface of the cylinder sleeve (20); There are two liquid suction grooves (24), and the two liquid suction grooves (24) are arranged at intervals along the axial direction of the cylinder sleeve (20); The distance H between the upper groove wall surface of the drain port (22) located below and the lower end surface of the cylinder sleeve (20) is g4 , the distance H between the upper groove wall surface of the suction groove (24) located below and the lower end surface of the cylinder sleeve (20) g9 Between: H g4 ≥H g9 .

22. The pump assembly according to claim 1, characterized in that There are two drainage ports (22), the two drainage ports (22) are arranged at intervals along the axial direction of the cylinder sleeve (20), and the two drainage ports (22) respectively penetrate the end surfaces at both axial ends of the cylinder sleeve (20); There are two liquid suction grooves (24), and the two liquid suction grooves (24) are arranged at intervals along the axial direction of the cylinder sleeve (20); The depth H of the drainage port (22) located at the top in the axial direction of the cylinder sleeve (20) is g11 , the distance H between the lower groove wall surface of the liquid suction groove (24) located above and the upper end surface of the cylinder sleeve (20) g8 Between: H g11 ≥H g8 .

23. The pump assembly according to claim 1, characterized in that There are two drainage ports (22), the two drainage ports (22) are arranged at intervals along the axial direction of the cylinder sleeve (20), and the two drainage ports (22) respectively penetrate the end surfaces at both axial ends of the cylinder sleeve (20); There are two liquid suction grooves (24), and the two liquid suction grooves (24) are arranged at intervals along the axial direction of the cylinder sleeve (20); The depth H of the drain port (22) located at the bottom in the axial direction of the cylinder sleeve (20) is g12 , the distance H between the upper groove wall surface of the suction groove (24) located below and the lower end surface of the cylinder sleeve (20) g9 Between: H g12 ≥H g9 .

24. A rotary cylinder pump, characterized in that: It comprises a pump body assembly, and the pump body assembly is the pump body assembly according to any one of claims 1 to 23.

25. A heat exchange device, characterized in that: It comprises a rotary cylinder pump, wherein the rotary cylinder pump is the rotary cylinder pump according to claim 24.

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