Oil pumping structure and compressor
By designing an intermittently connected oil tank structure in the compressor, the problem of insufficient lubricating oil return speed under large pressure difference conditions is solved, thereby improving the stability and reliability of the compressor.
Patent Information
- Application Number
- CN202423061831.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-12-11
AI Technical Summary
Under large pressure difference working conditions, the existing horizontal high and low back pressure compressors cannot keep up with the oil return speed, resulting in untimely oil return to the system, affecting the reliability and stability of the compressor.
The oil pump structure design is adopted, and intermittent oil supply is achieved by setting intermittently connected oil grooves in the crankshaft and cylinder head, which slows down the oil supply speed and prevents the oil return speed from not keeping up due to excessive oil supply.
It effectively slows down the oil supply speed, improves the operating stability and reliability of the compressor under large pressure difference conditions, and avoids the problem of insufficient oil return speed caused by excessive oil supply.
Smart Images
Figure CN223398885U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of compressors, in particular to an oil pump structure and a compressor. Background Art
[0002] The lubrication circuit of existing horizontal high-low back-pressure compressors is typically designed with an oil groove connecting the high-pressure and low-pressure sides in the cylinder head. Lubricating oil flows continuously from the high-pressure side to the low-pressure side through this groove. While this ensures lubrication between the cylinder head and crankshaft, large differential pressures can lead to excessive oil flow and slow oil return under high-pressure differential conditions, resulting in delayed oil return and reduced compressor reliability. Utility Model Content
[0003] The purpose of the utility model is to provide an oil pump structure and a compressor, which are suitable for large pressure difference working conditions, slow down the oil supply speed, prevent the situation where the oil return speed cannot keep up due to excessive oil supply, and are conducive to improving the stability and reliability of the compressor operation.
[0004] In a first aspect, the utility model provides an oil pump structure, comprising:
[0005] A crankshaft, comprising a long shaft and a short shaft connected to each other; a first oil groove is provided on the long shaft, and / or a second oil groove is provided on the short shaft;
[0006] a first cylinder head, wherein the first cylinder head is sleeved on the long shaft, and a third oil groove is provided on an inner wall of the first cylinder head;
[0007] and / or, a second cylinder head, wherein the second cylinder head is sleeved on the stub shaft, and a fourth oil groove is provided on an inner wall of the second cylinder head;
[0008] The long shaft rotates in the first cylinder head. When the long shaft rotates to a first position, the first oil groove and the third oil groove are connected. In other positions, the first oil groove and the third oil groove are not connected.
[0009] And / or, the stub shaft rotates in the second cylinder head, and when the stub shaft rotates to the second position, the second oil groove and the fourth oil groove are connected, and in other positions, the second oil groove and the fourth oil groove are not connected.
[0010] In an optional embodiment, the crankshaft includes an eccentric portion for connecting the long shaft and the short shaft; the long shaft includes a first proximal end close to the eccentric portion and a first distal end relatively far away from the eccentric portion; the first cylinder head is provided with a first shaft hole for the long shaft to pass through, the first shaft hole including a first shaft hole proximal end close to the eccentric portion and a first shaft hole distal end relatively far away from the eccentric portion;
[0011] The first proximal end is provided with the first oil groove, and the distal end of the first shaft hole is provided with the third oil groove;
[0012] Alternatively, the first distal end is provided with the first oil groove, and the proximal end of the first axial hole is provided with the third oil groove.
[0013] In an optional embodiment, if the axial length of the first cylinder head projected in a first plane parallel to the axial section of the major axis is L0, the axial length of the first oil groove projected in the first plane is L1, and the axial length of the third oil groove projected in the first plane is L3, then the sum of L1 and L3 is greater than L0; the projection of the first oil groove in the first plane is located within the projection of the first cylinder head in the first plane.
[0014] In an optional embodiment, the connecting intersection of the first oil groove and the third oil groove is the first connecting end of the first oil groove and the second connecting end of the third oil groove;
[0015] A first oil groove is arranged on the outer circumference of the long shaft, and a third oil groove is arranged on the inner wall of the first shaft hole of the first cylinder head;
[0016] Alternatively, a plurality of first oil grooves are distributed at intervals in the outer circumferential direction of the long shaft, and the plurality of first oil grooves do not intersect with each other. A plurality of third oil grooves are distributed at intervals in the circumferential direction of the inner wall of the first shaft hole of the first cylinder head, and the plurality of third oil grooves do not intersect with each other. The second connecting end of each of the third oil grooves corresponds to the first connecting end of each of the first oil grooves one by one in the circumferential direction. During the rotation of the crankshaft, the plurality of first oil grooves can be connected with the plurality of third oil grooves at the same time.
[0017] In an optional embodiment, the short shaft includes a second proximal end and a second distal end; the second cylinder head is provided with a second axial hole for the short shaft to pass through, the second axial hole including a second axial hole proximal end close to the eccentric portion and a second axial hole distal end relatively far from the eccentric portion;
[0018] The second proximal end is provided with the second oil groove, and the distal end of the second shaft hole is provided with the fourth oil groove;
[0019] Alternatively, the second distal end is provided with the second oil groove, and the proximal end of the second axial hole is provided with the fourth oil groove.
[0020] In an optional embodiment, if the axial length of the second cylinder head projected in a second plane parallel to the minor axis axial section is D0, the axial length of the second oil groove projected in the second plane is D2, and the axial length of the fourth oil groove projected in the second plane is D4, then the sum of D2 and D4 is greater than D0, and the projection of the second oil groove in the second plane is located within the projection of the second cylinder head in the second plane.
[0021] In an optional embodiment, the depths of the first oil groove, the second oil groove, the third oil groove and the fourth oil groove are respectively 0.3 mm to 0.6 mm.
[0022] In an optional embodiment, the first oil groove and the third oil groove respectively form an angle of [0°, 60°] with the projection of the major axis axis in the first plane of the first cylinder head parallel to the axial section of the major axis and the extended line of the projection; the second oil groove and the fourth oil groove respectively form an angle of [0°, 60°] with the projection of the minor axis axis in the second plane of the second cylinder head parallel to the axial section of the minor axis and the extended line of the projection.
[0023] In an optional embodiment, the number of the first oil tanks and the third oil tanks is no more than 3 respectively; the number of the second oil tanks and the fourth oil tanks is no more than 3 respectively.
[0024] In a second aspect, the present invention provides a compressor comprising the oil pump structure described in any one of the aforementioned embodiments.
[0025] The beneficial effects of the oil pump structure and compressor provided by the utility model include:
[0026] The oil pump structure provided by the utility model connects the first and third oil grooves only at the first position and remains disconnected at all other positions. The second and fourth oil grooves connect only at the second position and remain disconnected at all other positions. This intermittent connection of the oil grooves enables intermittent oil supply, effectively slowing down the oil supply and preventing overly rapid oil supply from causing the oil return rate to lag. This is particularly suitable for operating conditions with large pressure differentials, and helps improve the stability and reliability of compressor operation.
[0027] The compressor provided by the utility model includes the above-mentioned oil pump structure, which effectively slows down the oil supply speed and prevents the situation where the oil return speed cannot keep up due to excessively fast oil supply. It is particularly suitable for working conditions with large pressure differences and is beneficial to improving the stability and reliability of the compressor operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0029] Figure 1 An overall schematic diagram of the oil pump structure provided by an embodiment of the utility model;
[0030] Figure 2 A schematic diagram of a first structure of a crankshaft of an oil pump structure provided by an embodiment of the utility model;
[0031] Figure 3 A schematic diagram of a first structure of a first cylinder head of an oil pump structure provided by an embodiment of the utility model;
[0032] Figure 4 A second structural schematic diagram of a crankshaft of the oil pump structure provided by an embodiment of the utility model;
[0033] Figure 5 A schematic diagram of a second structure of the first cylinder head of the oil pump structure provided by an embodiment of the utility model;
[0034] Figure 6 A schematic diagram showing the positions of the first oil tank and the third oil tank of the oil pump structure provided in an embodiment of the present utility model;
[0035] Figures 7 to 9 Schematic diagram of the positions of the first oil groove and the third oil groove of the oil pump structure provided by an embodiment of the present utility model in three different states during the rotation of the crankshaft.
[0036] Icons: 100-oil pump structure; 110-crankshaft; 111-long shaft; 112-first oil groove; 1121-first connecting end; 113-first proximal end; 114-first distal end; 115-eccentric part; 120-short shaft; 121-second oil groove; 122-second proximal end; 123-second distal end; 130-first cylinder head; 131-third oil groove; 1311-second connecting end; 132-proximal end of first shaft hole; 133-distal end of first shaft hole; 134-first shaft hole; 140-second cylinder head; 142-proximal end of second shaft hole; 143-distal end of second shaft hole. DETAILED DESCRIPTION
[0037] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.
[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.
[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.
[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0041] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.
[0042] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0043] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.
[0044] An oil pump structure provided by an embodiment of the utility model is suitable for working conditions with a large pressure difference between the high and low pressure sides. It can not only achieve effective lubrication, but also slow down the oil supply speed to prevent the situation where the oil return speed cannot keep up due to excessive oil supply, which is beneficial to improving the stability and reliability of the compressor operation.
[0045] Combine Figure 1 and Figure 2The oil pump structure 100 provided by the embodiment of the present utility model includes a crankshaft 110, a first cylinder head 130 and a second cylinder head 140. The crankshaft 110 includes a long shaft 111 and a short shaft 120 connected to each other. A first oil groove 112 is provided on the long shaft 111, and / or a second oil groove 121 is provided on the short shaft 120. The first cylinder head 130 is sleeved on the long shaft 111, and a third oil groove 131 is provided on the inner wall of the first cylinder head 130, and / or the second cylinder head 140 is sleeved on the short shaft 120, and a fourth oil groove is provided on the inner wall of the second cylinder head 140. The long shaft 111 rotates in the first cylinder head 130. When the long shaft 111 rotates to the first position, the first oil groove 112 and the third oil groove 131 are connected. At other positions, the first oil groove 112 and the third oil groove 131 are not connected. And / or, the short shaft 120 rotates in the second cylinder head 140, and the short shaft 120 rotates to the second position, the second oil groove 121 and the fourth oil groove are connected, and in other positions, the second oil groove 121 and the fourth oil groove are not connected. Since the first oil groove 112 and the third oil groove 131 are connected only in the first position, they are not connected in other positions. The second oil groove 121 and the fourth oil groove are connected only in the second position, and are not connected in other positions. In this way, the intermittent oil supply method with intermittent connection of the oil grooves effectively slows down the oil supply speed, prevents the situation where the oil return speed cannot keep up due to excessive oil supply, and is conducive to improving the stability and reliability of the compressor operation.
[0046] It should be noted that the first position here can be a single point or include multiple points. For example, the range of 10 to 15 degrees, 100 to 105 degrees, 200 to 205 degrees, etc., when the crankshaft 110 rotates, can be understood as the first position. Of course, the rotation angle here is just an example, and the rotation range value required for actual work can be flexibly designed and adjusted. Accordingly, the first position can be a single point or include multiple points. Among them, the first position and the second position can be the same position of the crankshaft 110 rotation, or different positions, which are not specifically limited here.
[0047] It should be understood that when the long shaft 111 is provided with a first oil groove 112, the first cylinder head 130 is provided with a third oil groove 131 corresponding to the first oil groove 112; when the long shaft 111 rotates, the first oil groove 112 and the third oil groove 131 are intermittently connected. Alternatively, when the short shaft 120 is provided with a second oil groove 121, the second cylinder head 140 is provided with a fourth oil groove corresponding to the second oil groove 121; when the short shaft 120 rotates, the second oil groove 121 and the fourth oil groove are intermittently connected. Alternatively, when the long shaft 111 is provided with a first oil groove 112 and the short shaft 120 is provided with a second oil groove 121, the first cylinder head 130 is provided with a third oil groove 131 corresponding to the first oil groove 112, and the second cylinder head 140 is provided with a fourth oil groove corresponding to the second oil groove 121; when the crankshaft 110 rotates, the first oil groove 112 and the third oil groove 131 are intermittently connected, and the second oil groove 121 and the fourth oil groove are intermittently connected.
[0048] The first oil groove 112 and the third oil groove 131 are connected to the high-pressure chamber and the low-pressure chamber of the pump body, respectively. The second oil groove 121 and the fourth oil groove are connected to the high-pressure chamber and the low-pressure chamber of the pump body, respectively. When the compressor is running, the crankshaft 110 rotates, and the first oil groove 112 and the third oil groove 131 intersect and connect at the first position, and are not connected at other rotation angles. The second oil groove 121 and the fourth oil groove intersect and connect at the second position, and are not connected at other rotation angles. Under the action of the pressure difference between the high-pressure chamber and the low-pressure chamber, pump oil lubrication is intermittently provided to the friction pairs of the compressor.
[0049] The crankshaft 110 includes an eccentric portion 115 for connecting the long shaft 111 and the short shaft 120. The long shaft 111 includes a first proximal end 113 proximal to the eccentric portion 115 and a first distal end 114 relatively distal to the eccentric portion 115. The first cylinder head 130 is provided with a first axial hole 134 for the long shaft 111 to pass through. The first axial hole 134 includes a first axial hole proximal end 132 proximal to the eccentric portion 115 and a first axial hole distal end 133 relatively distal to the eccentric portion 115. The first axial hole proximal end 132 is correspondingly mounted on the first proximal end 113 of the long shaft 111, and the first axial hole distal end 133 is correspondingly mounted on the first distal end 114 of the crankshaft 110.
[0050] Combine Figure 2 and Figure 3 , the first distal end 114 is provided with a first oil groove 112, and the proximal end 132 of the first shaft hole is provided with a third oil groove 131. Or, in combination Figure 4 and Figure 5 The first proximal end 113 is provided with a first oil groove 112, and the first shaft hole distal end 133 is provided with a third oil groove 131. In this way, during the rotation of the crankshaft 110, the first oil groove 112 and the third oil groove 131 can be intermittently connected to achieve intermittent oil supply.
[0051] Of course, in some embodiments, the first proximal end 113 and the first distal end 114 are each provided with a first oil groove 112, and the first shaft hole proximal end 132 and the first shaft hole distal end 133 are each provided with a third oil groove 131. During the rotation of the crankshaft 110, the first oil groove 112 at the first proximal end 113 and the third oil groove 131 at the first shaft hole distal end 133 are intermittently connected, and the first oil groove 112 at the first distal end 114 and the third oil groove 131 at the first shaft hole proximal end 132 are intermittently connected.
[0052] Combine Figure 6Alternatively, if the axial length of the first cylinder head 130 projected onto a first plane parallel to the axial section of the long axis 111 is L0, the axial length of the first oil groove 112 projected onto the first plane is L1, and the axial length of the third oil groove 131 projected onto the first plane is L3, then the sum of L1 and L3 is greater than L0. This ensures that the first oil groove 112 and the third oil groove 131 can communicate during the rotation of the crankshaft 110. The projection of the first oil groove 112 onto the first plane is located within the projection of the first cylinder head 130 onto the first plane. In other words, the first oil groove 112 on the long axis 111 should be provided in the portion of the long axis 111 intended for assembly with the first cylinder head 130.
[0053] It should be noted that the shapes and sizes of the first oil groove 112 and the third oil groove 131 are not limited. They can be linear, arcuate, curved, spiral, wavy, or any other shape. The first oil groove 112 can be located anywhere on the long axis 111, and the third oil groove 131 can be located anywhere on the first cylinder head 130. As long as the first oil groove 112 and the third oil groove 131 can be connected and disconnected during the rotation of the crankshaft 110, no specific restrictions are imposed.
[0054] Combine Figures 7 to 9 , which is a schematic diagram of three different states of the first oil groove 112 and the third oil groove 131 during the rotation of the crankshaft. Optionally, the intersection of the first oil groove 112 and the third oil groove 131 is the first connecting end 1121 of the first oil groove 112 and the second connecting end 1311 of the third oil groove 131. There are one or more first oil grooves 112, and one or more third oil grooves 131. When there is only one first oil groove 112 and one third oil groove 131 respectively, one first oil groove 112 is arranged on the outer circumference of the long shaft 111, and one third oil groove 131 is arranged on the inner wall of the first shaft hole 134 of the first cylinder head 130. During the rotation of the crankshaft 110, one first oil groove 112 is intermittently connected to one third oil groove 131.
[0055] When there are multiple first oil grooves 112 and multiple third oil grooves 131 respectively, multiple first oil grooves 112 are distributed at intervals in the outer circumferential direction of the long axis 111, and the multiple first oil grooves 112 do not intersect with each other. Multiple third oil grooves 131 are distributed at intervals in the circumferential direction of the inner wall of the first axial hole 134 of the first cylinder head 130, and the multiple third oil grooves 131 do not intersect with each other. The second connecting end 1311 of each third oil groove 131 corresponds to the first connecting end 1121 of each first oil groove 112 one by one in the circumferential direction. During the rotation of the crankshaft 110, multiple first oil grooves 112 can be connected with multiple third oil grooves 131 at the same time. It can be understood that during the rotation of the crankshaft 110, each first oil groove 112 can also be connected with multiple third oil grooves 131 one by one.
[0056] Similarly, the short shaft 120 includes a second proximal end 122 and a second distal end 123 connected to each other; the second proximal end 122 is close to the eccentric portion 115, and the second distal end 123 is far away from the eccentric portion 115. The second cylinder head 140 is provided with a second axial hole for the short shaft 120 to pass through. The second axial hole includes a second axial hole proximal end 142 close to the eccentric portion 115 and a second axial hole distal end 143 relatively far away from the eccentric portion 115. The second axial hole proximal end 142 is correspondingly sleeved on the second proximal end 122, and the second axial hole distal end 143 is correspondingly sleeved on the second distal end 123. The second proximal end 122 is provided with a second oil groove 121, and the second axial hole distal end 143 is provided with a fourth oil groove. Alternatively, the second distal end 123 is provided with a second oil groove 121, and the second axial hole proximal end 142 is provided with a fourth oil groove. In this way, during the rotation of the crankshaft 110, the first oil groove 112 and the third oil groove 131 can be intermittently connected to achieve intermittent oil supply.
[0057] Of course, in some embodiments, the second proximal end 122 and the second distal end 123 are each provided with a second oil groove 121, and the second shaft hole proximal end 142 and the second shaft hole distal end 143 are each provided with a fourth oil groove. During rotation of the crankshaft 110, the second oil groove 121 at the second proximal end 122 and the fourth oil groove at the second shaft hole distal end 143 are intermittently connected, and the second oil groove 121 at the second distal end 123 and the fourth oil groove at the second shaft hole proximal end 142 are intermittently connected.
[0058] Alternatively, if the axial length of the second cylinder head 140 projected onto a second plane parallel to the axial cross-section of the minor axis 120 is D0, the axial length of the second oil groove 121 projected onto the second plane is D2, and the axial length of the fourth oil groove projected onto the second plane is D4, then the sum of D2 and D4 is greater than D0. The projection of the second oil groove 121 onto the first plane lies within the projection of the second cylinder head 140 onto the second plane. This ensures that the second oil groove 121 and the fourth oil groove remain connected during rotation of the crankshaft 110.
[0059] It should be noted that the shape and size of the second oil groove 121 and the fourth oil groove are not limited. They can be straight oil grooves, arc-shaped oil grooves, curved oil grooves, spiral oil grooves, wavy oil grooves, or any other arbitrary shape. There can be one or more second oil grooves 121, and one or more fourth oil grooves. The second oil groove 121 can be located at any position on the stub shaft 120, and the fourth oil groove can be located at any position on the second cylinder head 140. As long as the second oil groove 121 and the fourth oil groove can be connected and disconnected during the rotation of the crankshaft 110, no specific restrictions are imposed here.
[0060] When there is only one second oil groove 121 and one fourth oil groove, during rotation of the crankshaft 110, one second oil groove 121 is intermittently connected to one fourth oil groove. When there are multiple second oil grooves 121 and multiple fourth oil grooves, their distribution and connection methods are similar to the distribution and connection methods of the multiple first oil grooves 112 and multiple third oil grooves 131 described above, and will not be further described here.
[0061] Optionally, the first oil groove 112 and the third oil groove 131 respectively form an angle of [0°, 60°] with the projection of the axis of the major axis 111 in the first plane of the first cylinder head 130 parallel to the axial section of the major axis 111 and the extended line of the projection; the second oil groove 121 and the fourth oil groove respectively form an angle of [0°, 60°] with the projection of the axis of the minor axis 120 in the second plane of the second cylinder head 140 parallel to the axial section of the minor axis 120 and the extended line of the projection.
[0062] In order to prevent the oil supply from being too fast and the oil return speed from not keeping up, in this embodiment, the number of the first oil grooves 112 and the third oil grooves 131 are no more than 3 respectively; the number of the second oil grooves 121 and the fourth oil grooves are no more than 3 respectively.
[0063] Optionally, the depths of the first oil groove 112, the second oil groove 121, the third oil groove 131, and the fourth oil groove are respectively 0.3 mm to 0.6 mm. A shallow oil groove depth affects oil lubrication and increases pressure drop, while a deep oil groove depth can lead to excessive oil flow and insufficient oil return. The oil groove depth in this embodiment does not affect oil lubrication, increase pressure drop, or cause excessive oil flow and insufficient oil return, thereby improving the stability and reliability of compressor operation.
[0064] The present invention also provides a compressor comprising a drive member and an oil pump structure 100 according to any one of the aforementioned embodiments. The drive member comprises an electric motor or a motor, etc. The electric motor drives the crankshaft 110 to rotate. During the rotation of the crankshaft 110, the first oil groove 112 and the third oil groove 131 are intermittently connected to achieve intermittent oil supply. The second oil groove 121 and the fourth oil groove are intermittently connected to achieve intermittent oil supply, which can lubricate the friction pairs in the pump body. In this way, the oil supply speed is effectively slowed down, preventing the situation where the oil return speed cannot keep up due to excessive oil supply, thereby improving the stability and reliability of the compressor operation.
[0065] The compressor is suitable for rolling rotor compressors, not limited to double-cylinder or single-cylinder rotor compressors, and can be used in commercial air conditioners, vehicle air conditioners and other fields.
[0066] In summary, the oil pump structure 100 and the compressor provided by the embodiment of the present invention have the following beneficial effects, including:
[0067] In the oil pump structure 100 provided by the embodiment of the present invention, the first oil groove 112 and the third oil groove 131 are connected only at the first position, and are not connected at other positions. The second oil groove 121 and the fourth oil groove are connected only at the second position, and are not connected at other positions. The intermittent connection of the oil grooves is adopted to achieve intermittent oil supply, which effectively slows down the oil supply speed and prevents the situation where the oil return speed cannot keep up due to excessive oil supply. It is particularly suitable for working conditions with large pressure differences, which is beneficial to improving the stability and reliability of the compressor operation. The oil pump structure 100 has high overall reliability, simple manufacturing process, and does not require the addition of additional parts. In addition, the position and shape design of the first oil groove 112, the second oil groove 121, the third oil groove 131 and the fourth oil groove are flexible, and the combination methods are diverse. There is sufficient design space to adjust and adapt to different types of compressors, and the application scenarios are wide and flexible.
[0068] The compressor provided by the embodiment of the present invention includes the above-mentioned oil pump structure 100, which effectively slows down the oil supply speed and prevents the situation where the oil return speed cannot keep up due to excessive oil supply. It is particularly suitable for working conditions with large pressure differences and is beneficial to improving the stability and reliability of the compressor operation.
[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made should be included in the scope of protection of the present invention.
Claims
1. An oil pump structure, characterized in that: include: A crankshaft (110), the crankshaft (110) comprising a long shaft (111) and a short shaft (120) connected to each other; a first oil groove (112) is provided on the long shaft (111), and / or a second oil groove (121) is provided on the short shaft (120); a first cylinder head (130), wherein the first cylinder head (130) is sleeved on the long shaft (111), and a third oil groove (131) is provided on the inner wall of the first cylinder head (130); and / or, a second cylinder head (140), the second cylinder head (140) being sleeved on the short shaft (120), and a fourth oil groove being provided on an inner wall of the second cylinder head (140); The long shaft (111) rotates in the first cylinder head (130), and when the long shaft (111) rotates to a first position, the first oil groove (112) and the third oil groove (131) are connected, and in other positions, the first oil groove (112) and the third oil groove (131) are not connected; and / or, The short shaft (120) rotates in the second cylinder head (140). When the short shaft (120) rotates to a second position, the second oil groove (121) and the fourth oil groove are connected. In other positions, the second oil groove (121) and the fourth oil groove are not connected.
2. The oil pump structure according to claim 1, characterized in that: The crankshaft (110) includes an eccentric portion (115) for connecting the long shaft (111) and the short shaft (120); the long shaft (111) includes a first proximal end (113) close to the eccentric portion (115) and a first distal end (114) relatively far from the eccentric portion (115); the first cylinder head (130) is provided with a first shaft hole (134) for the long shaft (111) to pass through, the first shaft hole (134) including a first shaft hole proximal end (132) close to the eccentric portion (115) and a first shaft hole distal end (133) relatively far from the eccentric portion (115); The first proximal end (113) is provided with the first oil groove (112), and the first axial hole distal end (133) is provided with the third oil groove (131); Alternatively, the first distal end (114) is provided with the first oil groove (112), and the first axial hole proximal end (132) is provided with the third oil groove (131).
3. The oil pump structure according to claim 2, characterized in that: If the axial length of the first cylinder head (130) projected in a first plane parallel to the axial section of the major axis (111) is L0, the axial length of the first oil groove (112) projected in the first plane is L1, and the axial length of the third oil groove (131) projected in the first plane is L3, then the sum of L1 and L3 is greater than L0, and the projection of the first oil groove (112) in the first plane is located within the projection of the first cylinder head (130) in the first plane.
4. The oil pump structure according to claim 2, characterized in that: The connecting intersection of the first oil groove (112) and the third oil groove (131) is a first connecting end (1121) of the first oil groove (112) and a second connecting end (1311) of the third oil groove (131); A first oil groove (112) is arranged on the outer circumference of the long shaft (111), and a third oil groove (131) is arranged on the inner wall of the first shaft hole (134) of the first cylinder head (130); or, A plurality of first oil grooves (112) are distributed at intervals in the outer circumferential direction of the long axis (111), and the plurality of first oil grooves (112) do not intersect with each other. A plurality of third oil grooves (131) are distributed at intervals in the circumferential direction of the inner wall of the first shaft hole (134) of the first cylinder head (130), and the plurality of third oil grooves (131) do not intersect with each other. The second connecting end (1311) of each third oil groove (131) corresponds to the first connecting end (1121) of each first oil groove (112) in the circumferential direction. During the rotation of the crankshaft (110), the plurality of first oil grooves (112) can be connected to the plurality of third oil grooves (131) at the same time.
5. The oil pump structure according to claim 1, characterized in that: The crankshaft (110) includes an eccentric portion (115) for connecting the long shaft (111) and the short shaft (120); the short shaft (120) includes a second proximal end (122) and a second distal end (123); the second cylinder head (140) is provided with a second axial hole for the short shaft (120) to pass through, the second axial hole including a second axial hole proximal end (142) close to the eccentric portion (115) and a second axial hole distal end (143) relatively far from the eccentric portion (115); The second proximal end (122) is provided with the second oil groove (121), and the second axial hole distal end (143) is provided with the fourth oil groove; Alternatively, the second distal end (123) is provided with the second oil groove (121), and the second axial hole proximal end (142) is provided with the fourth oil groove.
6. The oil pump structure according to claim 5, characterized in that: If the axial length of the second cylinder head (140) projected in a second plane parallel to the axial section of the minor axis (120) is D0, the axial length of the second oil groove (121) projected in the second plane is D2, and the axial length of the fourth oil groove projected in the second plane is D4, then the sum of D2 and D4 is greater than D0, and the projection of the second oil groove (121) in the second plane is located within the projection of the second cylinder head (140) in the second plane.
7. The oil pump structure according to claim 1, characterized in that: The first oil groove (112) and the third oil groove (131) respectively form an angle of [0°, 60°] with the projection of the axis of the major axis (111) in the first plane of the first cylinder head (130) parallel to the axial section of the major axis (111) and the projection extension line; the second oil groove (121) and the fourth oil groove respectively form an angle of [0°, 60°] with the projection of the axis of the minor axis (120) in the second plane of the second cylinder head (140) parallel to the axial section of the minor axis (120) and the projection extension line.
8. The oil pump structure according to any one of claims 1 to 7, characterized in that: The depths of the first oil groove (112), the second oil groove (121), the third oil groove (131), and the fourth oil groove are respectively 0.3 mm to 0.6 mm.
9. The oil pump structure according to any one of claims 1 to 7, characterized in that: The number of the first oil grooves (112) and the third oil grooves (131) is no more than three respectively; the number of the second oil grooves (121) and the fourth oil grooves is no more than three respectively.
10. A compressor, characterized in that: The oil pump structure comprises the oil pump structure according to any one of claims 1 to 9.