Rotary cylinder pump and heat exchange equipment

Abstract

The invention provides a rotary cylinder pump and heat exchange equipment, the rotary cylinder pump comprises a rotating shaft, a cylinder sleeve, a piston sleeve and a piston, a lubricating oil channel of the rotating shaft is communicated with an oil pool, and the rotating shaft is provided with two eccentric parts; the rotating shaft and the cylinder sleeve are eccentrically arranged and the eccentric distance is fixed; the piston sleeve is rotatably arranged in the cylinder sleeve, and the extending direction of the two limiting channels of the piston sleeve is perpendicular to the axial direction of the rotating shaft; the two eccentric parts correspondingly extend into the two through holes of the two pistons, the two pistons are correspondingly arranged in the two limiting channels in a sliding mode and form a variable volume cavity, and the variable volume cavity is located in the sliding direction of the pistons; the communicating hole of the rotating shaft is used for communicating the lubricating oil channel with the oil through hole. The problems that in the running process of a fluorine pump in the prior art, a piston sleeve rotates in a cylinder sleeve at a high speed, the outer circumferential face of the piston sleeve and the inner circumferential face of the cylinder sleeve rub against each other, friction power consumption is generated, the energy efficiency of the fluorine pump is reduced, and even the service life of the piston sleeve and the cylinder sleeve is shortened are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange systems, and in particular to a rotary cylinder pump and a heat exchange device. Background Art

[0002] With the development of society, the power consumption of data centers is increasing year by year, resulting in huge power consumption. Computer room air conditioning is an important part of the data center, accounting for 40% of the power consumption of the data center. The application of its energy-saving technology is of great significance.

[0003] Computer room air conditioners are devices used to cool the electrical components of data centers. They need to be refrigerated all year round to ensure that the indoor temperature can be maintained within a certain range. Most of the existing computer room air conditioners use compression refrigeration technology, and rely on compression refrigeration systems for cooling in both summer and winter. When the ambient temperature is high, the existing compression refrigeration technology can meet the performance and energy efficiency requirements; when the outdoor ambient temperature is significantly lower than the indoor temperature, the most economical and energy-saving refrigeration method is to use the outdoor low temperature to cool the indoor temperature. The industry has been exploring a low-temperature refrigeration mode that can make full use of the outdoor low temperature and is highly economical. In recent years, a fluorine pump-compression dual-circulation system has been proposed, that is, in the high temperature season, the existing compression refrigeration mode is used; in the low temperature season, a low-power fluorine pump is used to replace the high-power compressor as the power source to complete the refrigeration cycle, thereby achieving energy-saving effects.

[0004] However, in the prior art, since the piston sleeve rotates at high speed in the cylinder sleeve during operation of the fluorine pump, the outer circumference of the piston sleeve and the inner circumference of the cylinder sleeve rub against each other, generating friction power consumption, reducing the energy efficiency of the fluorine pump and even reducing the service life of the piston sleeve and the cylinder sleeve. Summary of the invention

[0005] The main purpose of the present invention is to provide a rotary cylinder pump and a heat exchange device to solve the problem that during the operation of the fluorine pump in the prior art, the piston sleeve rotates at high speed in the cylinder sleeve, causing the outer circumferential surface of the piston sleeve and the inner circumferential surface of the cylinder sleeve to rub against each other, generating friction power consumption, reducing the energy efficiency of the fluorine pump, and even reducing the service life of the piston sleeve and the cylinder sleeve.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a rotary cylinder pump is provided, comprising a rotating shaft, a cylinder sleeve, a piston sleeve and a piston, wherein the rotating shaft has a lubricating oil passage, which extends along the axial direction of the rotating shaft and passes through one axial end of the rotating shaft so that the lubricating oil passage is connected to the oil pool, and the rotating shaft is also provided with two eccentric parts along its axial direction; the rotating shaft and the cylinder sleeve are eccentrically arranged and the eccentric distance is fixed; the piston sleeve is rotatably arranged in the cylinder sleeve, and the piston sleeve has two limiting channels, which are arranged in sequence along the axial direction of the rotating shaft, and the extending direction of the limiting channels is perpendicular to the axial direction of the rotating shaft; the piston has a through hole, and the piston is two, and the two eccentric parts are arranged in sequence along the axial direction of the rotating shaft. The core portion extends into the two through holes of the two pistons correspondingly, and the two pistons are correspondingly slidably arranged in the two limit 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 limit channel while interacting with the piston sleeve to make the piston sleeve and the piston rotate in the cylinder sleeve; wherein the piston sleeve has an oil through hole, and the oil through hole passes through the inner circumference and outer circumference of the piston sleeve, and the rotating shaft also has a connecting hole, and the connecting hole is used to connect the lubricating oil channel and the oil through hole, so that the refrigerant oil in the oil pool flows into the outer circumference of the piston sleeve and the inner circumference of the cylinder sleeve through the lubricating oil channel, the connecting hole, and the oil through hole in sequence.

[0007] Furthermore, the piston sleeve has a center hole, the two limit channels are connected through the center hole, and the aperture of the center hole is larger than the diameter of the shaft body portion of the rotating shaft; the oil hole extends radially along the piston sleeve and passes through the hole wall of the center hole, and the connecting hole extends radially along the rotating shaft and passes through the shaft body portion located in the center hole.

[0008] Furthermore, the cylinder liner has a liquid inlet channel, which extends radially and passes through the outer peripheral surface of the cylinder liner. The inner wall surface of the cylinder liner also has two liquid suction chambers, which are arranged at intervals along the axial direction of the cylinder liner; the cylinder liner also has a through hole, which passes through the two axial end surfaces of the cylinder liner, and the through hole is used to connect the two liquid suction chambers with the liquid inlet channel, so that the refrigerant flows to the corresponding two variable volume chambers respectively through the liquid inlet channel, the through hole, and the two liquid suction chambers in sequence; the hole diameter D1 of the oil hole, the first sealing height H1 of the oil hole and the liquid suction chamber in the axial direction of the cylinder liner, and the first cavity opening distance H2 of the two liquid suction chambers respectively connected to the corresponding two variable volume chambers in the axial direction of the cylinder liner satisfy the following conditions: 0.1mm≤H1≤H2-D1-0.1mm.

[0009] Furthermore, the cylinder liner has two drainage channels, which are spaced apart along the axial direction of the cylinder liner, and both of which extend along the radial direction of the cylinder liner and penetrate the outer peripheral surface of the cylinder liner, and the two drainage channels are not connected; the hole diameter D1 of the oil hole, the second sealing height H3 of the oil hole and the drainage channel in the axial direction of the cylinder liner, and the second cavity opening distance H4 of the two drainage channels respectively connected to the corresponding two variable volume cavities in the axial direction of the cylinder liner satisfy the following conditions: 0.1mm≤H3≤H4-D1-0.1mm.

[0010] Furthermore, the diameter D1 of the oil hole, the third sealing height H5 between the oil hole and the limiting channel in the axial direction of the piston sleeve, and the spacing H6 between the two limiting channels in the axial direction of the piston sleeve satisfy: 0.1mm≤H5≤H6-D1-0.1mm.

[0011] Furthermore, the diameter D1 of the oil hole satisfies: 0.5 mm ≤ D1 ≤ 5 mm.

[0012] Furthermore, the cross section of the oil hole is one of circular, elliptical and polygonal.

[0013] Furthermore, the number of the oil holes is one or more; wherein, when there are multiple oil holes, the height positions of at least two of the multiple oil holes in the axial direction of the piston sleeve are inconsistent; or, the height positions of the multiple oil holes in the axial direction of the piston sleeve are consistent.

[0014] 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 limit difference of a second angle B between the extension directions of the two limit channels, wherein the first angle A is twice the second angle B.

[0015] Furthermore, there are two oil holes, and there is a limit difference of a third angle C between the extension directions of the two oil holes, and the third angle C is equal to the second angle B.

[0016] According to another aspect of the present invention, a heat exchange device is provided, comprising a rotary cylinder pump, wherein the rotary cylinder pump is the rotary cylinder pump described above.

[0017] The technical solution of the present invention is applied to provide a rotary cylinder pump, including a rotating shaft, a cylinder sleeve, a piston sleeve and a piston, wherein the rotating shaft has a lubricating oil passage, which extends along the axial direction of the rotating shaft and passes through one axial end of the rotating shaft so that the lubricating oil passage is connected to the oil pool, and the rotating shaft is also provided with two eccentric parts along its axial direction; the rotating shaft and the cylinder sleeve are eccentrically arranged and the eccentric distance is fixed; the piston sleeve is rotatably arranged in the cylinder sleeve, and the piston sleeve has two limiting channels, which are sequentially arranged along the axial direction of the rotating shaft, and the extending 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, and the two eccentric parts correspond to The two pistons extend into two through holes, and the two pistons are correspondingly slidably arranged in two limit channels to form a variable volume chamber, which is located in the sliding direction of the piston. The rotating shaft rotates to drive the piston to slide back and forth in the limit channel while interacting with the piston sleeve to make the piston sleeve and the piston rotate in the cylinder sleeve; wherein the piston sleeve has an oil through hole, which passes through the inner circumference and outer circumference of the piston sleeve, and the rotating shaft also has a connecting hole, which is used to connect the lubricating oil channel and the oil through hole, so that the refrigerant oil in the oil pool flows into the outer circumference of the piston sleeve and the inner circumference of the cylinder sleeve through the lubricating oil channel, the connecting hole, and the oil through hole in sequence.

[0018] By arranging a lubricating oil passage and a connecting hole on the rotating shaft, and arranging an oil through hole on the piston sleeve, during the rotation of the rotating shaft, the refrigerant oil sucked into the lubricating oil passage is transported to the outer circumferential surface of the piston sleeve and the inner circumferential surface of the cylinder sleeve through the connecting hole and the oil through hole in sequence by centrifugal force, so that the contact surfaces between the two are lubricated, the friction power consumption between the two is reduced, and the energy efficiency of the rotary cylinder pump is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a 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 of the present invention. In the drawings:

[0020] Figure 1 A schematic cross-sectional view of a rotary cylinder pump according to an optional embodiment of the present invention is shown;

[0021] Figure 2 A schematic diagram of the exploded structure of a rotary cylinder pump according to an optional embodiment of the present invention is shown;

[0022] Figure 3 Shows Figure 1 A schematic cross-sectional view of the rotary cylinder pump from another perspective;

[0023] Figure 4 Shows Figure 2 A schematic diagram of the structure of the cylinder sleeve of the rotary cylinder pump;

[0024] Figure 5 Shows Figure 4 Schematic diagram of the cross-sectional structure at DD in FIG.

[0025] Figure 6 Shows Figure 1 A schematic cross-sectional view of the rotary cylinder pump in which the cylinder sleeve and the piston sleeve are in an assembled state;

[0026] Figure 7 Shows Figure 2 A schematic diagram of the structure of the piston sleeve of the rotary cylinder pump;

[0027] Figure 8 Shows Figure 7 A schematic structural diagram of the piston sleeve from another perspective.

[0028] The above drawings include the following reference numerals:

[0029] 10. Rotating shaft; 11. Lubricating oil passage; 12. Eccentric portion; 13. Connecting hole;

[0030] 20. Cylinder sleeve; 21. Liquid inlet channel; 22. Liquid suction chamber; 23. Liquid discharge channel; 24. Through hole;

[0031] 30. Piston sleeve; 31. Position limiting channel; 311. Variable volume chamber; 32. Oil hole; 33. Center hole;

[0032] 40. piston; 41. through hole;

[0033] 51. Upper flange; 52. Lower flange. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In order to solve the problem in the prior art that during the operation of the fluorine pump, the piston sleeve rotates at high speed in the cylinder sleeve, causing the outer circumference of the piston sleeve and the inner circumference of the cylinder sleeve to rub against each other, generating friction power consumption, reducing the energy efficiency of the fluorine pump, and even reducing the service life of the piston sleeve and the cylinder sleeve, the present invention provides a rotary cylinder pump and a heat exchange device, wherein the heat exchange device includes a rotary cylinder pump, and the rotary cylinder pump is the rotary cylinder pump described above and below.

[0036] like Figures 1 to 8As shown, the rotary cylinder pump includes a rotating shaft 10, a cylinder sleeve 20, a piston sleeve 30 and a piston 40, wherein the rotating shaft 10 has a lubricating oil passage 11, which extends along the axial direction of the rotating shaft 10 and passes through one axial end of the rotating shaft 10, so that the lubricating oil passage 11 is connected to the oil pool, and the rotating shaft 10 is also provided with two eccentric parts 12 along its axial direction; the rotating shaft 10 and the cylinder sleeve 20 are eccentrically arranged and the eccentric distance is fixed; the piston sleeve 30 is rotatably arranged in the cylinder sleeve 20, and the piston sleeve 30 has two limiting channels 31, and the two limiting channels 31 are sequentially arranged along the axial direction of the rotating shaft 10, and the extending direction of the limiting channels 31 is perpendicular to the axial direction of the rotating shaft 10; the piston 40 has a through hole 41, and there are two pistons 40, and the two eccentric parts 12 extend into the two ends of the two pistons 40 correspondingly. In a through hole 41, two pistons 40 are correspondingly slidably arranged in two limit channels 31 and form a variable volume chamber 311, and the variable volume chamber 311 is located in the sliding direction of the piston 40. The rotating shaft 10 rotates to drive the piston 40 to slide back and forth in the limit channel 31 while interacting with the piston sleeve 30, so that the piston sleeve 30 and the piston 40 rotate in the cylinder sleeve 20; wherein, the piston sleeve 30 has an oil through hole 32, and the oil through hole 32 passes through the inner circumference and the outer circumference of the piston sleeve 30. The rotating shaft 10 also has a connecting hole 13, and the connecting hole 13 is used to connect the lubricating oil channel 11 and the oil through hole 32, so that the refrigerant oil in the oil pool flows into the outer circumference of the piston sleeve 30 and the inner circumference of the cylinder sleeve 20 through the lubricating oil channel 11, the connecting hole 13, and the oil through hole 32 in sequence.

[0037] The technical solution of the present invention is applied to provide a rotary cylinder pump, including a rotating shaft 10, a cylinder sleeve 20, a piston sleeve 30 and a piston 40, wherein the rotating shaft 10 has a lubricating oil passage 11, which extends along the axial direction of the rotating shaft 10 and penetrates one axial end of the rotating shaft 10 so that the lubricating oil passage 11 is connected to the oil pool, and the rotating shaft 10 is also provided with two eccentric parts 12 along its axial direction; the rotating shaft 10 and the cylinder sleeve 20 are eccentrically arranged and the eccentric distance is fixed; the piston sleeve 30 is rotatably arranged in the cylinder sleeve 20, and the piston sleeve 30 has two limiting channels 31, and the two limiting channels 31 are sequentially arranged along the axial direction of the rotating shaft 10, and the extending direction of the limiting channels 31 is perpendicular to the axial direction of the rotating shaft 10; the piston 40 has a through hole 41, and there are two pistons 40, and the two eccentric parts 12 extend into the two corresponding holes. In the two through holes 41 of each piston 40, the two pistons 40 are correspondingly slidably arranged in the two limiting channels 31 and form a variable volume chamber 311, the variable volume chamber 311 is located in the sliding direction of the piston 40, the rotating shaft 10 rotates to drive the piston 40 to slide back and forth in the limiting channel 31 while interacting with the piston sleeve 30, so that the piston sleeve 30 and the piston 40 rotate in the cylinder sleeve 20; wherein, the piston sleeve 30 has an oil through hole 32, the oil through hole 32 passes through the inner circumference and the outer circumference of the piston sleeve 30, the rotating shaft 10 also has a connecting hole 13, the connecting hole 13 is used to connect the lubricating oil channel 11 and the oil through hole 32, so that the refrigerant oil in the oil pool flows into the outer circumference of the piston sleeve 30 and the inner circumference of the cylinder sleeve 20 through the lubricating oil channel 11, the connecting hole 13, and the oil through hole 32 in sequence.

[0038] By arranging the lubricating oil passage 11 and the connecting hole 13 on the rotating shaft 10, and arranging the oil through hole 32 on the piston sleeve 30, during the rotation of the rotating shaft 10, the refrigerant oil sucked into the lubricating oil passage 11 is transported to the outer peripheral surface of the piston sleeve 30 and the inner peripheral surface of the cylinder sleeve 20 through the connecting hole 13 and the oil through hole 32 in sequence by centrifugal force, so that the contact surfaces between the two are lubricated, the friction power consumption between the two is reduced, and it is beneficial to improve the energy efficiency of the rotary cylinder pump.

[0039] like Figure 1 , Figure 2 , Figure 7 As shown, the piston sleeve 30 has a central hole 33, and the two limiting channels 31 are connected through the central hole 33, and the diameter of the central hole 33 is larger than the diameter of the shaft body of the rotating shaft 10; the oil hole 32 extends in the radial direction of the piston sleeve 30 and passes through the hole wall of the central hole 33, and the connecting hole 13 extends in the radial direction of the rotating shaft 10 and passes through the shaft body located in the central hole 33. In this way, the reliability of the connection between the oil hole 32 and the lubricating oil passage 11 through the connecting hole 13 is ensured.

[0040] like Figure 5 and Figure 6As shown, the cylinder liner 20 has a liquid inlet channel 21, which extends radially and passes through the outer peripheral surface of the cylinder liner 20. The inner wall surface of the cylinder liner 20 also has two liquid suction chambers 22, and the two liquid suction chambers 22 are arranged at intervals along the axial direction of the cylinder liner 20; the cylinder liner 20 also has a through hole 24, which passes through the two axial end surfaces of the cylinder liner 20, and the through hole 24 is used to connect the two liquid suction chambers 22 with the liquid inlet channel 21, so that the refrigerant passes through the liquid inlet channel 21, the through hole 24, and the two liquid suction chambers 22 in sequence and flows to the corresponding two variable volume chambers 311 respectively; the hole diameter D1 of the oil hole 32, the first sealing height H1 of the oil hole 32 and the liquid suction chamber 22 in the axial direction of the cylinder liner 20, and the first cavity opening distance H2 of the two liquid suction chambers 22 connected with the corresponding two variable volume chambers 311 in the axial direction of the cylinder liner 20 satisfy: 0.1mm≤H1≤H2-D1-0.1mm. In this way, it is ensured that the oil through hole 32 is not connected with the liquid suction chamber 22 when passing through the liquid suction position, thereby preventing the oil through hole 32 from leaking and affecting the cooling capacity and performance of the rotary cylinder pump.

[0041] like Figure 5 and Figure 6 As shown, the cylinder sleeve 20 has two drainage channels 23, which are spaced apart along the axial direction of the cylinder sleeve 20, and both of which extend along the radial direction of the cylinder sleeve 20 and penetrate the outer peripheral surface of the cylinder sleeve 20, and the two drainage channels 23 are not connected; the hole diameter D1 of the oil hole 32, the second sealing height H3 of the oil hole 32 and the drainage channel 23 in the axial direction of the cylinder sleeve 20, and the second cavity distance H4 of the two drainage channels 23 in the axial direction of the cylinder sleeve 20 respectively connected with the corresponding two variable volume chambers 311 meet the following conditions: 0.1mm≤H3≤H4-D1-0.1mm. In this way, it is ensured that the oil hole 32 is not connected with the drainage channel 23 when passing the drainage position, and the oil hole 32 is prevented from leaking, which affects the cooling capacity and performance of the rotary cylinder pump.

[0042] like Figure 8 As shown, the diameter D1 of the oil hole 32, the third sealing height H5 between the oil hole 32 and the limiting channel 31 in the axial direction of the piston sleeve 30, and the spacing distance H6 between the two limiting channels 31 in the axial direction of the piston sleeve 30 satisfy: 0.1mm≤H5≤H6-D1-0.1mm. In this way, it is ensured that the oil hole 32 is not connected to the variable volume chamber 311, and the high-pressure liquid is prevented from directly leaking from the oil hole 32 to the variable volume chamber 311, which affects the cooling capacity and performance of the rotary cylinder pump.

[0043] It should be noted that in the present application, the diameter D1 of the oil hole 32 satisfies: 0.5 mm ≤ D1 ≤ 5 mm. In this way, the oil supply of the oil hole 32 is ensured while preventing leakage of the oil hole 32, thereby increasing the cooling capacity of the rotary cylinder pump and reducing friction power consumption.

[0044] Optionally, the cross section of the oil hole 32 is one of circular, elliptical and polygonal.

[0045] Preferably, the cross section of the oil through hole 32 is circular.

[0046] It should be noted that, in the present application, the number of the oil holes 32 is one or more; wherein, when there are multiple oil holes 32, the height positions of at least two of the multiple oil holes 32 in the axial direction of the piston sleeve 30 are inconsistent; or, the height positions of the multiple oil holes 32 in the axial direction of the piston sleeve 30 are all consistent.

[0047] It should be noted that, in the present application, there is a phase difference of a first angle A between the two eccentric portions 12, the eccentricities of the two eccentric portions 12 are equal, and there is a limiting difference of a second angle B between the extension directions of the two limiting channels 31, wherein the first angle A is twice the second angle B. In this way, by setting the piston sleeve 30 to have a structure with two limiting channels 31 and correspondingly setting two pistons 40, the two eccentric portions 12 of the rotating shaft 10 extend into the two through holes 41 of the two pistons 40, and at the same time, the two pistons 40 are correspondingly slidably set in the two limiting channels 31 to form a variable volume chamber 311. Since the first angle A between the two eccentric portions 12 is twice the second angle B between the extension directions of the two limiting channels 31, when one of the two pistons 40 is at the dead point position, that is, the driving of the eccentric portion 12 corresponding to the piston 40 at the dead point position is The torque is 0, and the piston 40 at the dead point position cannot continue to rotate. At this time, the driving torque of the corresponding piston 40 driven by the other eccentric part 12 of the two eccentric parts 12 is at the maximum value, ensuring that the eccentric part 12 with the maximum driving torque can normally drive the corresponding piston 40 to rotate, thereby driving the piston sleeve 30 to rotate through the piston 40, and then driving the piston 40 at the dead point position to continue to rotate through the piston sleeve 30, thereby realizing the stable operation of the fluid machinery, avoiding the dead point position of the motion mechanism, and improving the motion reliability of the fluid machinery, thereby ensuring the working reliability of the heat exchange equipment.

[0048] Optionally, there are two oil holes 32 , and there is a limit difference of a third angle C between the extension directions of the two oil holes 32 , and the third angle C is equal to the second angle B.

[0049] like Figure 1 As shown, the rotary cylinder pump further includes an upper flange 51 and a lower flange 52 , and the upper flange 51 and the lower flange 52 are respectively arranged at two axial ends of the cylinder sleeve 20 .

[0050] The technical solution of the present invention is applied to provide a rotary cylinder pump, including a rotating shaft 10, a cylinder sleeve 20, a piston sleeve 30 and a piston 40, wherein the rotating shaft 10 has a lubricating oil passage 11, which extends along the axial direction of the rotating shaft 10 and penetrates one axial end of the rotating shaft 10 so that the lubricating oil passage 11 is connected to the oil pool, and the rotating shaft 10 is also provided with two eccentric parts 12 along its axial direction; the rotating shaft 10 and the cylinder sleeve 20 are eccentrically arranged and the eccentric distance is fixed; the piston sleeve 30 is rotatably arranged in the cylinder sleeve 20, and the piston sleeve 30 has two limiting channels 31, and the two limiting channels 31 are sequentially arranged along the axial direction of the rotating shaft 10, and the extending direction of the limiting channels 31 is perpendicular to the axial direction of the rotating shaft 10; the piston 40 has a through hole 41, and there are two pistons 40, and the two eccentric parts 12 extend into the two corresponding holes. In the two through holes 41 of each piston 40, the two pistons 40 are correspondingly slidably arranged in the two limiting channels 31 and form a variable volume chamber 311, the variable volume chamber 311 is located in the sliding direction of the piston 40, the rotating shaft 10 rotates to drive the piston 40 to slide back and forth in the limiting channel 31 while interacting with the piston sleeve 30, so that the piston sleeve 30 and the piston 40 rotate in the cylinder sleeve 20; wherein, the piston sleeve 30 has an oil through hole 32, the oil through hole 32 passes through the inner circumference and the outer circumference of the piston sleeve 30, the rotating shaft 10 also has a connecting hole 13, the connecting hole 13 is used to connect the lubricating oil channel 11 and the oil through hole 32, so that the refrigerant oil in the oil pool flows into the outer circumference of the piston sleeve 30 and the inner circumference of the cylinder sleeve 20 through the lubricating oil channel 11, the connecting hole 13, and the oil through hole 32 in sequence.

[0051] By arranging the lubricating oil passage 11 and the connecting hole 13 on the rotating shaft 10, and arranging the oil through hole 32 on the piston sleeve 30, during the rotation of the rotating shaft 10, the refrigerant oil sucked into the lubricating oil passage 11 is transported to the outer peripheral surface of the piston sleeve 30 and the inner peripheral surface of the cylinder sleeve 20 through the connecting hole 13 and the oil through hole 32 in sequence by centrifugal force, so that the contact surfaces between the two are lubricated, the friction power consumption between the two is reduced, and it is beneficial to improve the energy efficiency of the rotary cylinder pump.

[0052] 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.

[0053] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. 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, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method 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 being 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 an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rotary cylinder pump, characterized in that: include: A rotating shaft (10), the rotating shaft (10) having a lubricating oil passage (11), the lubricating oil passage (11) extending along the axial direction of the rotating shaft (10) and penetrating one axial end of the rotating shaft (10) so that the lubricating oil passage (11) is connected to an oil pool, and the rotating shaft (10) is also provided with two eccentric parts (12) along its axial direction; The cylinder sleeve (20), the rotating shaft (10) and the cylinder sleeve (20) are eccentrically arranged with a fixed eccentric distance; A piston sleeve (30), the piston sleeve (30) being rotatably disposed in the cylinder sleeve (20), the piston sleeve (30) having two limiting channels (31), the two limiting channels (31) being sequentially disposed along the axial direction of the rotating shaft (10), and the extending direction of the limiting channels (31) being perpendicular to the axial direction of the rotating shaft (10); A piston (40), wherein the piston (40) has a through hole (41), there are two pistons (40), the two eccentric parts (12) extend into the two through holes (41) of the two pistons (40) respectively, the two pistons (40) are slidably arranged in the two limiting channels (31) respectively and form a variable volume chamber (311), the variable volume chamber (311) is located in the sliding direction of the piston (40), the rotating shaft (10) rotates to drive the piston (40) to slide back and forth in the limiting channel (31) and interacts with the piston sleeve (30) so that the piston sleeve (30) and the piston (40) rotate in the cylinder sleeve (20); The piston sleeve (30) has an oil through hole (32), and the oil through hole (32) passes through the inner circumference and the outer circumference of the piston sleeve (30). The rotating shaft (10) also has a connecting hole (13), and the connecting hole (13) is used to connect the lubricating oil passage (11) and the oil through hole (32), so that the refrigerant oil in the oil pool flows into the outer circumference of the piston sleeve (30) and the inner circumference of the cylinder sleeve (20) through the lubricating oil passage (11), the connecting hole (13), and the oil through hole (32) in sequence.

2. The rotary cylinder pump according to claim 1, characterized in that: The piston sleeve (30) has a central hole (33), the two limiting channels (31) are connected through the central hole (33), and the diameter of the central hole (33) is larger than the diameter of the shaft body of the rotating shaft (10); The oil through hole (32) extends in the radial direction of the piston sleeve (30) and passes through the hole wall surface of the center hole (33); the connecting hole (13) extends in the radial direction of the rotating shaft (10) and passes through the shaft body portion located in the center hole (33).

3. The rotary cylinder pump according to claim 1, characterized in that: The cylinder sleeve (20) has a liquid inlet channel (21), the liquid inlet channel (21) extends radially and passes through the outer peripheral surface of the cylinder sleeve (20), the inner wall surface of the cylinder sleeve (20) also has two liquid suction cavities (22), and the two liquid suction cavities (22) are arranged at intervals along the axial direction of the cylinder sleeve (20); The cylinder sleeve (20) further comprises a through hole (24), wherein the through hole (24) penetrates through two axial end surfaces of the cylinder sleeve (20), and the through hole (24) is used to connect the two liquid suction chambers (22) with the liquid inlet channel (21), so that the refrigerant flows sequentially through the liquid inlet channel (21), the through hole (24), and the two liquid suction chambers (22) to the corresponding two variable volume chambers (311); The hole diameter D1 of the oil through hole (32), the first sealing height H1 of the oil through hole (32) and the liquid suction chamber (22) in the axial direction of the cylinder sleeve (20), and the first chamber opening distance H2 in the axial direction of the cylinder sleeve (20) between the two liquid suction chambers (22) and the corresponding two variable volume chambers (311) satisfy the following conditions: 0.1 mm ≤ H1 ≤ H2 - D1 - 0.1 mm.

4. The rotary cylinder pump according to claim 1, characterized in that: The cylinder liner (20) has a drainage channel (23), and there are two drainage channels (23). The two drainage channels (23) are arranged at intervals along the axial direction of the cylinder liner (20), and the two drainage channels (23) both extend along the radial direction of the cylinder liner (20) and pass through the outer peripheral surface of the cylinder liner (20), and the two drainage channels (23) are not connected; The hole diameter D1 of the oil through hole (32), the second sealing height H3 of the oil through hole (32) and the drainage channel (23) in the axial direction of the cylinder sleeve (20), and the second cavity opening distance H4 in the axial direction of the cylinder sleeve (20) between the cavity openings of the two drainage channels (23) and the corresponding two variable volume chambers (311) satisfy the following conditions: 0.1 mm ≤ H3 ≤ H4 - D1 - 0.1 mm.

5. The rotary cylinder pump according to claim 1, characterized in that: The hole diameter D1 of the oil through hole (32), the third sealing height H5 of the oil through hole (32) and the limiting channel (31) in the axial direction of the piston sleeve (30), and the spacing distance H6 between the two limiting channels (31) in the axial direction of the piston sleeve (30) satisfy the following conditions: 0.1 mm ≤ H5 ≤ H6 - D1 - 0.1 mm.

6. The rotary cylinder pump according to claim 1, characterized in that: The hole diameter D1 of the oil through hole (32) satisfies: 0.5 mm≤D1≤5 mm.

7. The rotary cylinder pump according to claim 1, characterized in that: The cross section of the oil through hole (32) is one of a circular shape, an elliptical shape and a polygonal shape.

8. The rotary cylinder pump according to claim 1, characterized in that: The number of the oil holes (32) is one or more; Wherein, when there are a plurality of the oil through holes (32), the height positions of at least two of the plurality of the oil through holes (32) in the axial direction of the piston sleeve (30) are inconsistent; or, The height positions of the plurality of oil through holes (32) in the axial direction of the piston sleeve (30) are all consistent.

9. The rotary cylinder pump according to any one of claims 1 to 8, characterized in that: There is a phase difference of a first angle A between the two eccentric portions (12), the eccentricities of the two eccentric portions (12) are equal, and there is a limiting difference of a second angle B between the extension directions of the two limiting channels (31), wherein the first angle A is twice the second angle B.

10. The rotary cylinder pump according to claim 9, characterized in that: There are two oil through holes (32), and there is a limit difference of a third angle C between the extension directions of the two oil through holes (32), and the third angle C is equal to the second angle B.

11. 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 any one of claims 1 to 10.

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