Crankshaft, compressor and refrigeration equipment

Abstract

The present application provides a crankshaft, a compressor and a refrigeration device. The crankshaft includes a crank, a main shaft and an eccentric shaft. An oil suction cavity is provided at one end of the main shaft. A distribution oil passage extending into the main shaft is provided in the eccentric shaft. A first oil hole communicating with the distribution oil passage is opened on the main shaft. Two spiral grooves are provided on the outer peripheral surface of the main shaft, and the spiral directions of the two spiral grooves are opposite. One end of each spiral groove communicates with the first oil hole. A second oil hole communicating the oil suction cavity with the spiral groove is also opened on the main shaft. The crankshaft further includes a separator for separating one ends of the two spiral grooves close to the first oil hole, and the separator is provided on the main shaft. For the crankshaft of the present application, by providing spiral grooves with opposite spiral directions on the main shaft and providing a separator on the main shaft to separate one ends of the two spiral grooves close to the eccentric shaft, it can be avoided that the lubricating oil pumped out by one spiral groove directly enters the other spiral groove and is pumped back, so that good oil supply can be ensured during both forward and reverse rotations of the crankshaft.

Description

Technical Field

[0001] This application belongs to the technical field of compressors. More specifically, it relates to a crankshaft, a compressor, and a refrigeration device. Background Art

[0002] When a compressor is operating, lubricating oil needs to be supplied to each friction pair to reduce the frictional loss during the operation of each component, and the lubricating oil can also play a certain role in cooling and heat dissipation. Generally, spiral grooves are provided on the crankshaft of the compressor, and through the oil pumping action of the spiral grooves, oil is supplied to the distribution oil passage in the eccentric shaft of the crankshaft, and then to each friction pair. In a compressor, due to the relationship of variable frequency and variable capacity, its motor and crankshaft not only need to rotate forward, but also often need to rotate backward. Please refer to Figure 1 , in the related art, generally, an oil inlet hole 112' communicating with the distribution oil passage 121' in the eccentric shaft 12' is provided on the main shaft 11' of the crankshaft 10', and two spiral grooves 111' with opposite helix directions are provided on the main shaft 11'. The two spiral grooves 111' intersect at the oil inlet hole 112' so that when the crankshaft 10 rotates forward and backward, oil is pumped through different spiral grooves 111'. However, in this structure, when one spiral groove pumps oil in the direction of the eccentric shaft, the other spiral groove pumps oil in the opposite direction, that is, one spiral groove pumps oil into the oil inlet hole, and the other spiral groove sucks oil from the oil inlet hole. This will cause a large reduction in the lubricating oil entering the oil passage in the eccentric shaft, resulting in insufficient oil supply. Summary of the Invention

[0003] The purpose of the embodiments of this application is to provide a crankshaft, a compressor, and a refrigeration device to solve the problem of insufficient oil supply in the positive and negative bidirectional spiral groove oil supply structure on the crankshaft of a compressor that can rotate forward and backward in the prior art.

[0004] To achieve the above purpose, the technical solution adopted in the embodiments of this application is: to provide a crankshaft, including a crank, a main shaft provided on one side of the crank, and an eccentric shaft provided on the other side of the crank. An oil suction cavity is provided at one end of the main shaft away from the eccentric shaft. A distribution oil passage extending into the main shaft is provided in the eccentric shaft. A first oil hole communicating with the distribution oil passage is opened on the main shaft. Two spiral grooves are axially opened on the outer peripheral surface of the main shaft along the axis of the main shaft. The helix directions of the two spiral grooves are opposite. One end of each spiral groove communicates with the first oil hole. A second oil hole communicating the oil suction cavity with the spiral groove is also opened on the main shaft. The crankshaft further includes a partition for separating one ends of the two spiral grooves close to the first oil hole. The partition is provided on the main shaft.

[0005] In an optional embodiment, the partition partially extends into the first oil hole.

[0006] In an alternative embodiment, the separator divides the first oil hole into two sub-oil holes, the two sub-oil holes are respectively communicated with the two spiral grooves, and the two sub-oil holes are communicated with the distribution oil passage.

[0007] In an alternative embodiment, the separator partially extends into the distribution oil passage.

[0008] In an alternative embodiment, positioning grooves are formed on opposite sides of the inner surface of the first oil hole, and two sides of the separator are respectively inserted into the two positioning grooves.

[0009] In an alternative embodiment, a first rotating shaft is provided at the lower end of the separator, a first shaft hole is correspondingly formed on the main shaft, and the first rotating shaft is rotatably installed in the first shaft hole.

[0010] In an alternative embodiment, the length of the separator along the axial direction of the main shaft is greater than the width of the spiral groove, and the length of the separator along the axial direction of the main shaft is less than the inner diameter of the first oil hole.

[0011] In an alternative embodiment, the separator includes a separating section disposed between the two spiral grooves and an inserting section inserted into the first oil hole, and the inserting section is fixed in the first oil hole.

[0012] In an alternative embodiment, the inserting section is fixed in the first oil hole by interference fit;

[0013] Alternatively, the inserting section is welded to the first oil hole;

[0014] Alternatively, the inserting section is adhered to the first oil hole.

[0015] In an alternative embodiment, the crankshaft further includes a fastening structure for fixing the separator to the main shaft, and the fastening structure is fixedly connected to the main shaft.

[0016] In an alternative embodiment, the pitches of the two spiral grooves are equal.

[0017] In an alternative embodiment, the number of the second oil holes is one, and the other ends of the two spiral grooves intersect at the second oil hole.

[0018] Another object of the embodiments of the present application is to provide a compressor, including the crankshaft as described in any one of the above embodiments.

[0019] Another object of the embodiments of the present application is to provide a refrigeration device, including the compressor as described in the above embodiments.

[0020] The beneficial effects of the crankshaft provided by the embodiments of the present application are as follows: Compared with the prior art, for the crankshaft of the present application, by providing helical grooves with opposite helix directions on the main shaft and providing a separator on the main shaft to separate the ends of the two helical grooves close to the eccentric shaft, it can be avoided that the lubricating oil pumped out by one helical groove directly enters the other helical groove and is pumped back, so that good oil supply can be ensured whether the crankshaft rotates forward or backward.

[0021] The beneficial effects of the compressor provided by the embodiments of the present application are as follows: Compared with the prior art, for the compressor of the present application, the above-mentioned crankshaft is used, and good oil supply can be ensured during both forward and reverse rotations, so that the compressor operates stably.

[0022] The beneficial effects of the refrigeration equipment provided by the embodiments of the present application are as follows: Compared with the prior art, for the refrigeration equipment of the present application, the above-mentioned compressor is used, and it operates more stably and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or exemplary technical descriptions. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 FIG. 15 is a front view structural schematic diagram of the crankshaft provided by the traditional technology;

[0025] Figure 2 FIG. 19 is a front view structural schematic diagram of the crankshaft provided by an embodiment of the present application;

[0026] Figure 3 For Figure 2 an enlarged view of part A in FIG.

[0027] Figure 4 For Figure 2 the side view structural schematic diagram of the crankshaft shown in FIG.

[0028] Figure 5 For Figure 4 an enlarged view of part B in FIG.

[0029] Figure 6 FIG. 41 is a structural schematic diagram of a partial area of the crankshaft provided by another embodiment of the present application;

[0030] Figure 7 FIG. 45 is a structural schematic diagram of a partial area of the crankshaft provided by another embodiment of the present application;

[0031] Figure 8 FIG. 49 is a structural schematic diagram of a partial area of the crankshaft provided by another embodiment of the present application;

[0032] Figure 9 Schematic diagram of a partial region of a crankshaft provided by another embodiment of the present application;

[0033] Figure 10 Schematic side view of a crankshaft provided by another embodiment of the present application;

[0034] Figure 11 Schematic side view of a crankshaft provided by another embodiment of the present application;

[0035] Figure 12 Schematic front view of a crankshaft provided by another embodiment of the present application;

[0036] Figure 13 For Figure 12 Schematic front view of the crankshaft shown when it rotates forward;

[0037] Figure 14 For Figure 12 Schematic front view of the crankshaft shown when it rotates in reverse;

[0038] Figure 15 For Figure 12 Schematic side view of the crankshaft shown;

[0039] Figure 16 For Figure 12 Schematic diagram of the separator in the crankshaft shown;

[0040] Figure 17 Schematic side view of a crankshaft provided by another embodiment of the present application;

[0041] Figure 18 For Figure 17 Schematic diagram of the separator in the crankshaft shown;

[0042] Figure 19 Schematic front view of a crankshaft provided by another embodiment of the present application;

[0043] Figure 20 For Figure 19 Schematic front view of the crankshaft shown when it rotates forward;

[0044] Figure 21 For Figure 19 Schematic front view of the crankshaft shown when it rotates in reverse;

[0045] Figure 22 Schematic side view of a crankshaft provided by another embodiment of the present application;

[0046] Figure 23 For Figure 22 Schematic diagram of the movable stopper in the crankshaft shown;

[0047] Figure 24 Front view structural schematic diagram of the crankshaft provided by another embodiment of the present application;

[0048] Figure 25 is Figure 24 Side view structural schematic diagram of the crankshaft shown.

[0049] Among them, the main marks of each attached drawing in the figure are:

[0050] 10 - Crankshaft;

[0051] 11 - Main shaft; 111 - Oil suction cavity; 112 - Spiral groove; 1120 - Confluence area; 1121 - First spiral groove; 1122 - Second spiral groove; 113 - First oil hole; 1131 - Sub - oil hole; 114 - Second oil hole; 115 - Positioning groove; 116 - Oil guiding groove; 117 - First shaft hole; 118 - Second shaft hole; 12 - Eccentric shaft; 121 - Oil distribution channel; 13 - Crank; 14 - Partition member; 141 - Partition section; 142 - Insertion section; 143 - First rotating shaft; 15 - Movable stopper; 151 - Second rotating shaft. Specific embodiments

[0052] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the following further details the present application in conjunction with the attached drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0053] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0054] In the description of the present application, "a plurality of" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. The terms "center", "length", "width", "thickness", "upper", "lower", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the attached drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0055] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0056] References to "one embodiment", "some embodiments", or "an embodiment" in the description of the present application mean that a specific feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the present application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc., which appear in different places in this specification, are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in another way. In addition, in one or more embodiments, specific features, structures, or characteristics can be combined in any suitable manner.

[0057] Please refer to Figures 2 to 5 , Figure 2 which is a front view structural schematic diagram of the crankshaft 10 provided in this embodiment, where part of the structure is a perspective structure to show the flow path of the lubricating oil. Figure 3 is Figure 2 an enlarged view of part A in Figure 4 which is a side view structural schematic diagram of the crankshaft 10 provided in this embodiment. Figure 5 is Figure 4 an enlarged view of part B in

[0058] Please refer to Figure 2 and Figure 5 , and now the crankshaft 10 provided by the present application will be described. The crankshaft 10 includes a main shaft 11, a crank 13, and an eccentric shaft 12. Among them, the main shaft 11 and the eccentric shaft 12 are respectively installed on both sides of the crank 13, and the eccentric shaft 12 is connected to the main shaft 11 through the crank 13 so that when the main shaft 11 rotates, the eccentric shaft 12 is driven to rotate.

[0059] An oil suction cavity 111 is provided in the main shaft 11. The oil suction cavity 111 is located at one end of the main shaft 11 and is at the end of the main shaft 11 far from the eccentric shaft 12. When the main shaft 11 rotates, the oil suction cavity 111 can suck lubricating oil from the oil sump of the compressor.

[0060] The eccentric shaft 12 is provided with a distribution oil passage 121 so that lubricating oil can enter each friction pair from the distribution oil passage 121 to supply oil to each friction pair, reduce the wear of each friction pair, and play a role in cooling and heat dissipation.

[0061] Please refer to Figure 2 、 Figure 3 and Figure 4 As shown in, two spiral grooves 112 are provided on the outer peripheral surface of the main shaft 11. The spiral grooves 112 extend spirally along the axial direction of the main shaft 11, and the spiral directions of the two spiral grooves 112 are opposite. So that when the main shaft 11 rotates forward or backward, one of the spiral grooves 112 can play a role in pumping lubricating oil, that is, play a role in pumping oil. The distribution oil passage 121 extends into the main shaft 11, and the main shaft 11 is also provided with a first oil hole 113 and a second oil hole 114. The two ends of the spiral groove 112 are respectively communicated with the first oil hole 113 and the second oil hole 114. The first oil hole 113 is communicated with the distribution oil passage 121, and one ends of the two spiral grooves 112 intersect at the first oil hole 113, thereby communicating the spiral groove 112 with the distribution oil passage 121, so that the lubricating oil pumped by the spiral groove 112 can enter the distribution oil passage 121 through the first oil hole 113. The second oil hole 114 is communicated with the oil suction cavity 111, thereby connecting the spiral groove 112 with the oil suction cavity 111, so that when the spiral groove 112 pumps oil, lubricating oil can be sucked from the oil suction cavity 111.

[0062] The crankshaft 10 further includes a separator 14. The separator 14 is arranged on the main shaft 11. The separator 14 separates one ends of the two spiral grooves 112, that is, the separator 14 separates one ends of the two spiral grooves 112 close to the first oil hole 113. That is to say, the corresponding end of one spiral groove 112 is located on one side of the separator 14, and the corresponding end of the other spiral groove 112 is located on the other side of the separator 14. Thus, when the crankshaft 10 rotates, the oil suction cavity 111 sucks lubricating oil, and under the action of centrifugal force, the lubricating oil moves along the inner wall of the oil suction cavity 111, and then enters the spiral groove 112 through the second oil hole 114. Since the spiral directions of the two spiral grooves 112 are opposite, when the crankshaft 10 rotates, there must be one spiral groove 112 that pumps oil in the direction of the eccentric shaft 12. When one spiral groove 112 pumps the lubricating oil to the first oil hole 113, it is blocked by the separator 14 and will enter the first oil hole 113, and will not directly enter the other spiral groove 112, so that the lubricating oil gradually accumulates in the first oil hole 113. When the crankshaft 10 rotates, the distribution oil passage 121 in the eccentric shaft 12 is farther away from the rotation center axis of the crankshaft 10. Under the action of centrifugal force, the suction force generated at the first oil hole 113 is greater than the suction force of the other spiral groove 112 at the first oil hole 113. Therefore, most of the lubricating oil in the first oil hole 113 will enter the distribution oil passage 121 to ensure a good oil supply volume and can realize good oil supply for both forward and reverse rotations of the crankshaft 10.

[0063] For ease of description, the two spiral grooves 112 are respectively defined as a first spiral groove 1121 and a second spiral groove 1122. One end of the first spiral groove 1121 close to the first oil hole 113 is located on one side of the separator 14, and one end of the second spiral groove 1122 close to the first oil hole 113 is located on the other side of the separator 14; one end of the first spiral groove 1121 close to the first oil hole 113 and one end of the second spiral groove 1122 close to the first oil hole 113 are separated by the separator 14. When the lubricating oil is pumped to the first oil hole 113 through the first spiral groove 1121, it is blocked by the separator 14 and will not directly enter the second spiral groove 1122. In this way, the lubricating oil pumped by the first spiral groove 1121 will gather and enter the first oil hole 113. The rotation radius of the second spiral groove 1122 is smaller than that of the distribution oil passage 121 in the eccentric shaft 12. Under the action of centrifugal force, the suction force generated by the distribution oil passage 121 at the first oil hole 113 is greater, so that most of the lubricating oil in the first oil hole 113 will enter the distribution oil passage 121 to supply oil to each friction pair and ensure sufficient oil supply.

[0064] Compared with the prior art, the crankshaft 10 provided by the present application can avoid the lubricating oil pumped out by one spiral groove 112 directly entering another spiral groove 112 and being pumped back by arranging spiral grooves 112 with opposite spiral directions on the main shaft 11 and arranging a separator 14 on the main shaft 11 to separate one ends of the two spiral grooves 112 close to the eccentric shaft 12, so that good oil supply can be ensured during both forward and reverse rotations of the crankshaft 10.

[0065] In one embodiment, please refer to Figures 3 to 5 , the separator 14 partially extends into the first oil hole 113, so that not only can the two spiral grooves 112 be better separated, but also the lubricating oil entering the first oil hole 113 from one spiral groove 112 can be better prevented from flowing back into the other spiral groove 112, increasing the path length and damping of the lubricating oil reaching the other spiral groove 112, and further enabling more lubricating oil in the first oil hole 113 to enter the distribution oil passage 121. It can be understood that when the width of the intersection of the two spiral grooves 112 is greater than the inner diameter of the first oil hole 113, the width of the intersection of the two spiral grooves 112 at this point refers to the width of the intersection of the two spiral grooves 112 along the axial direction of the main shaft 11. The separator 14 can also be only installed on the main shaft 11 and separate the two spiral grooves 112.

[0066] In one embodiment, the separator 14 partially extends into the distribution oil passage 121, that is, a partial structure of the separator 14 extends into the distribution oil passage 121. The separator 14 is entirely located at the corresponding position between the two spiral grooves 112 so as to separate the two spiral grooves 112. Therefore, the part of the separator 14 extending into the distribution oil passage 121 is also located at the corresponding position between the two spiral grooves 112. Inserting the separator 14 into the distribution oil passage 121 can increase the path length and damping of the lubricating oil being sucked into the spiral groove 112, better avoid the backflow of the lubricating oil, and thus ensure sufficient oil supply.

[0067] In one embodiment, please refer to Figure 3 and Figure 5 , positioning grooves 115 are respectively formed on the opposite sides of the inner surface of the first oil hole 113. The opposite sides of the inner surface of the first oil hole 113 are the side of the first oil hole 113 close to the eccentric shaft 12 and the side far from the eccentric shaft 12. In this way, when installing the separator 14, the two sides of the separator 14 can be respectively inserted into the two positioning grooves 115, so as to install the separator 14 on the main shaft 11, which is convenient for assembly and can conveniently separate the two spiral grooves 112.

[0068] In one embodiment, please refer to Figure 3 and Figure 5 , the separator 14 divides the first oil hole 113 into two sub-oil holes 1131. For example, the separator 14 can be inserted into the first oil hole 113, and the parts of the first oil hole 113 on both sides of the separator 14 form two sub-oil holes 1131. The two sub-oil holes 1131 are respectively communicated with the two spiral grooves 112 to better avoid the lubricating oil pumped into the first oil hole 113 by one spiral groove 112 from entering the other spiral groove 112. The two sub-oil holes 1131 are communicated with the distribution oil passage 121 so that the lubricating oil in the sub-oil holes 1131 can enter the body distribution oil passage 121.

[0069] In one embodiment, two sub-oil holes 1131 arranged at intervals can be processed, and the two spiral grooves 112 are respectively connected to the two sub-oil holes 1131, and the part between the two sub-oil holes 1131 constitutes the separator 14. This structure makes the separator 14 and the main shaft 11 an integral structure, ensuring the firm connection between the separator 14 and the main shaft 11.

[0070] In one embodiment, the separator 14 can use a flat part, such as a plate part. Inserting the separator 14 into the first oil hole 113 to divide the first oil hole 113 into two sub-oil holes 1131, this structure can be convenient for processing and manufacturing.

[0071] In one embodiment, the width of the separator 14 along the axial direction of the first oil hole 113 is less than the depth of the first oil hole 113. After installing the separator 14, the two sub-oil holes 1131 are connected at the bottom in the depth direction of the first oil hole 113, which can also provide a larger communication space between each sub-oil hole 1131 and the distribution oil hole, so that the lubricating oil in the first oil hole 113 can enter the distribution oil hole.

[0072] In one embodiment, referring to Figure 2 and Figure 4 , the pitches of the two spiral grooves 112 are equal. In this way, when the crankshaft 10 rotates forward and backward, when their rotational speeds are approximately equal, their oil pumping amounts are also approximately equal, which is convenient for control. It can be understood that the pitches of the two spiral grooves 112 can also be set to be unequal. For example, the ends of the two spiral grooves 112 close to the oil suction cavity 111 are separated, and the two spiral grooves 112 are respectively communicated with the oil suction cavity 111 through two second oil holes 114.

[0073] In one embodiment, referring to Figure 2 and Figure 4 , the number of the second oil holes 114 is one, and the ends of the two spiral grooves 112 far from the eccentric shaft 12 intersect at the second oil hole 114. In this way, the lubricating oil in the oil suction cavity 111 can directly reach the two spiral grooves 112 through the second oil hole 114, which is convenient for processing and manufacturing. In addition, only setting one second oil hole 114 can also ensure good strength of the main shaft 11. It can be understood that two second oil holes 114 can also be provided on the main shaft 11, and the two second oil holes 114 are arranged at intervals. The two spiral grooves 112 are respectively communicated with the two second oil holes 114. In this way, the lubricating oil can be respectively led to the two spiral grooves 112 through the two second oil holes 114, and the positions of the ends of the spiral grooves 112 far from the eccentric shaft 12 can be conveniently arranged.

[0074] Referring to Figure 6 , Figure 6 is a schematic structural diagram of a partial area of the crankshaft 10 provided in the embodiment, which shows the structure of the first oil hole 113 and the separator 14. The structure of this embodiment is a modification based on Figure 5 . In this embodiment, the width of the separator 14 along the axial direction of the first oil hole 113 is greater than or equal to the depth of the first oil hole 113. After installing the separator 14 in the first oil hole 113, the first oil hole 113 can be separated into two sub-oil holes 1131, and the two sub-oil holes 1131 are not communicated within the range of the first oil hole 113. In this way, the lubricating oil pumped by one spiral groove 112 to the corresponding sub-oil hole 1131 can enter the distribution oil passage 121 more, reducing and avoiding the lubricating oil pumped by one spiral groove 112 from entering another spiral groove 112 and flowing back.

[0075] Referring toFigure 7 , Figure 7 Schematic diagram of a partial area of the crankshaft 10 provided for the embodiment, which shows the structure of the first oil hole 113 and the separator 14. The structure of this embodiment is a modification based on Figure 5 . In this embodiment, the separator 14 includes a separating section 141 and an inserting section 142. The inserting section 142 is connected to the separating section 141, and the inserting section 142 is inserted into the first oil hole 113 to facilitate fixing the inserting section 142 in the first oil hole 113, thereby supporting the separating section 141 and separating the ends of the two spiral grooves 112 close to the crank 13. The inserting section 142 is provided to facilitate fixing the separator 14. The separating section 141 is provided to better cooperate with separating the two spiral grooves 112. In addition, when the width of the intersection of the two spiral grooves 112 is greater than the inner diameter of the first oil hole 113, that is, when the width of the intersection of the two spiral grooves 112 close to the eccentric shaft 12 is greater than the inner diameter of the first oil hole 113, the width of the intersection of the two spiral grooves 112 at this position refers to the width along the axial direction of the main shaft 11 at the intersection of the two spiral grooves 112. The separating section 141 is provided to better separate the two spiral grooves 112.

[0076] In one embodiment, the inserting section 142 is connected to the first oil hole 113 by interference fit to fix the inserting section 142 in the first oil hole 113 for convenient assembly.

[0077] In one embodiment, the inserting section 142 can be welded in the first oil hole 113 to fix the separator 14 on the main shaft 11. Of course, the separating section 141 can also be welded on the main shaft 11 to fix the separator 14 on the main shaft 11.

[0078] In one embodiment, the inserting section 142 can be bonded to the first oil hole 113 to fixedly install the separator 14. Of course, the separating section 141 can also be bonded on the main shaft 11 to fix the separator 14 on the main shaft 11.

[0079] In one embodiment, a fastening structure can also be provided. The fastening structure is fixed on the main shaft 11, and then the separator 14 is fixed on the main shaft 11. The fastening structure can be a pin shaft. Pin holes are respectively opened on the separator 14 and the main shaft 11 to fix the separator 14 on the main shaft 11 through the pin shaft. The fastening structure can also be a bushing. The separator 14 is pressed against the main shaft 11 through the bushing to fix the separator 14 on the main shaft 11.

[0080] Please refer to Figure 8 , Figure 8 Schematic diagram of a partial area of the crankshaft 10 provided for the embodiment, which shows the structure of the first oil hole 113 and the separator 14. The structure of this embodiment is a modification based on Figure 3Modifications based on [description not provided]. In this embodiment, the width at the intersection of the two spiral grooves 112 is less than or equal to the inner diameter of the first oil hole 113. The width at the intersection of the two spiral grooves 112 here refers to the width along the axial direction of the main shaft 11 at the intersection of the two spiral grooves 112. The separator 14 is inserted into the first oil hole 113, and the separator 14 divides the first oil hole 113 into two sub-oil holes 1131, that is, separates the two spiral grooves 112. The corresponding separator 14 only needs to be fitted and installed in the first oil hole 113, which is convenient for assembly and also convenient for the processing and manufacturing of the main shaft 11. For example, when processing the first oil hole 113, it only needs the inner diameter of the first oil hole 113 to be greater than or equal to the width at the intersection of the two spiral grooves 112.

[0081] In one embodiment, the separator 14 can use a flat shaft pin. Inserting it into the first oil hole 113 can separate the two spiral grooves 112, which is convenient for processing and manufacturing and has a low cost.

[0082] Please refer to Figure 9 , Figure 9 FIG. [figure number not provided] is a schematic structural diagram of a partial area of the crankshaft 10 provided by the embodiment, which shows the structure of the first oil hole 113 and the separator 14. The structure of this embodiment is a modification based on Figure 8 Modifications based on [description not provided]. In this embodiment, the width at the intersection of the two spiral grooves 112 is less than or equal to the inner diameter of the first oil hole 113. The width at the intersection of the two spiral grooves 112 here refers to the width along the axial direction of the main shaft 11 at the intersection of the two spiral grooves 112. The separator 14 is inserted into the first oil hole 113 and divides the first oil hole 113 into two sub-oil holes 1131. The thickness of the separator 14 near the crank 13 is greater than the thickness of the separator 14 away from the crank 13. In this way, the connection area between each sub-oil hole 1131 and the corresponding spiral groove 112 can be larger, so as to facilitate the lubricating oil pumped by the spiral groove 112 to enter the sub-oil hole 1131; while the connection area between the sub-oil hole 1131 and the distribution oil passage 121 is smaller, which can increase the damping of the lubricating oil in the distribution oil passage 121 entering the sub-oil hole 1131. When the crankshaft 10 rotates, one spiral groove 112 pumps lubricating oil and accumulates in the corresponding sub-oil hole 1131, and the distribution oil passage 121 will form a negative pressure at the sub-oil hole 1131 to suck the lubricating oil. And the damping of the lubricating oil in the distribution oil passage 121 entering the other sub-oil hole 1131 increases, which can better prevent the lubricating oil from being sucked back by the other spiral groove 112.

[0083] In one embodiment, in the direction from the spiral groove 112 towards the crank 13, the thickness of the separator 14 is gradually increasing. In this way, the lubricating oil can be guided into the distribution oil passage 121 through the side surface of the separator 14, which is beneficial for oil supply. And this structure is also convenient for the processing and manufacturing of the separator 14.

[0084] Please refer to Figure 10, Figure 10 A schematic side view structure diagram of the crankshaft 10 provided for the embodiment. The structure of this embodiment is a modification based on Figure 4 . In this embodiment, an oil guiding groove 116 is provided on the inner wall of the oil suction cavity 111. The oil guiding groove 116 extends along the axial direction of the main shaft 11, and the oil guiding mechanism extends to the second oil hole 114. By providing the oil guiding groove 116 on the inner wall of the oil suction cavity 111, the rotation radius of the lubricating oil in the oil guiding groove 116 can be increased. Thus, under the action of centrifugal force, more lubricating oil can gather in the oil guiding groove 116 and flow along the oil guiding groove 116 to the second oil hole 114, and then flow into the spiral groove 112, so as to improve the oil supply capacity and facilitate the spiral groove 112 to pump the lubricating oil. In addition, by providing the oil guiding groove 116, when the rotation radius is the same, the inner diameter of the oil suction cavity 111 can be made smaller, which can increase the structural strength of the main shaft 11.

[0085] In one embodiment, the oil guiding groove 116 is a straight groove for convenient processing and manufacturing.

[0086] Please refer to Figure 11 , Figure 11 A schematic side view structure diagram of the crankshaft 10 provided for the embodiment. The structure of this embodiment is a modification based on Figure 10 . In this embodiment, in the direction from the main shaft 11 towards the eccentric shaft 12: the distance from the bottom surface 1161 of the oil guiding groove 116 to the central axis of the main shaft 11 is gradually increasing. Thus, under the action of centrifugal force, the lubricating oil in the oil suction cavity 111 gathers towards the oil guiding groove 116, and in the direction of the oil guiding groove 116 towards the second oil hole 114, its rotation radius is gradually increasing. In this way, the oil guiding groove 116 can guide the lubricating oil to flow towards the second oil hole 114 for better oil supply.

[0087] In one embodiment, the bottom surface 1161 of the oil guiding groove 116 is a plane for convenient processing and manufacturing. Of course, the bottom surface of the oil guiding groove 116 can also be set to be curved.

[0088] The crankshaft 10 of the embodiment of the present application can achieve good oil pumping during forward and reverse rotations. During forward and reverse rotations, it can ensure sufficient lubricating oil supply, improve the service life of the compressor using the crankshaft 10, and ensure the stable operation of the compressor.

[0089] Please refer to Figures 12 to 16 , Figure 12 A schematic front view structure diagram of the crankshaft provided for this embodiment. Figure 13 A schematic front view structure diagram of the crankshaft 10 during forward rotation provided for this embodiment. Figure 14 A schematic front view structure diagram of the crankshaft 10 during reverse rotation provided for this embodiment. Figure 15 A schematic side view structure diagram of the crankshaft 10 provided for this embodiment. Figure 16Schematic diagram of the separator 14 in the crankshaft 10 provided in this embodiment. The structure of this embodiment is a modification based on Figure 1 . In this embodiment, a first rotating shaft 143 is provided on the separator 14, and the first rotating shaft 143 is located at the lower end of the separator 14. The lower end of the separator 14 refers to the end of the separator 14 close to the oil suction chamber 111. Thus, the separator 14 can be supported by the first rotating shaft 143. A first shaft hole 117 is formed in the main shaft 11, and the first rotating shaft 143 is inserted into the first shaft hole 117, and the first rotating shaft 143 can rotate in the first shaft hole 117, so that the separator 14 can rotate on the main shaft 11.

[0090] Please refer to Figure 13 and Figure 14 . When the separator 14 can rotate on the main shaft 11 and the lower end of the separator 14 is rotatably mounted on the main shaft 11, when the crankshaft 10 rotates, the separator 14 swings reversely under the action of centrifugal force. As Figure 13 shows, when the crankshaft 10 rotates forward, the second spiral groove 1122 pumps oil towards the distribution oil passage 121, while the separator 14 swings towards the first spiral groove 1121, so as to reduce the area of communication between the first spiral groove 1121 and the first oil hole 113, thereby increasing the resistance of the lubricating oil in the first oil hole 113 to enter the first spiral groove 1121. Or, the separator 14 can block the connection between the first spiral groove 1121 and the first oil hole 113 to prevent the lubricating oil in the first oil hole 113 from entering the first spiral groove 1121, so that more lubricating oil enters the distribution oil passage 121.

[0091] Similarly, as Figure 14 shows, when the crankshaft 10 rotates reversely, the first spiral groove 1121 pumps oil towards the distribution oil passage 121 and the direction, while the separator 14 swings towards the second spiral groove 1122, so as to reduce the area of communication between the second spiral groove 1122 and the first oil hole 113, thereby increasing the resistance of the lubricating oil in the first oil hole 113 to enter the second spiral groove 1122. Or, the separator 14 can block the connection between the second spiral groove 1122 and the first oil hole 113 to prevent the lubricating oil in the first oil hole 113 from entering the second spiral groove 1122, so that more lubricating oil enters the distribution oil passage 121.

[0092] In one embodiment, the length of the separator 14 is less than the inner diameter of the first oil hole 113. Here, the length of the separator 14 refers to the length of the separator 14 along the axial direction of the main shaft 11. Of course, the length of the separator 14 refers to the length along the radial direction of the first rotating shaft 143. The length of the separator 14 is set to be less than the inner diameter of the first oil hole 113 so that the separator 14 can swing flexibly on the main shaft 11. For example, when the crankshaft 10 rotates forward, the separator 14 can swing towards the direction of the first spiral groove 1121, and when the crankshaft 10 rotates in reverse, the separator 14 can swing towards the direction of the second spiral groove 1122.

[0093] The length of the separator 14 is greater than the width of the spiral groove 112. Here, the length of the separator 14 refers to the length of the separator 14 along the axial direction of the main shaft 11. Of course, the length of the separator 14 refers to the length along the radial direction of the first rotating shaft 143. If the length of the separator 14 is greater than the width of the spiral groove 112, then when the separator 14 rotates towards the direction of one spiral groove 112, the side wall of the spiral groove 112 can support the separator 14 so that the separator 14 blocks the spiral groove 112. For example, when the crankshaft 10 rotates forward, the separator 14 can swing towards the direction of the first spiral groove 1121, and the end face of the first spiral groove 1121 can limit the position of the separator 14 to support the separator 14; when the crankshaft 10 rotates in reverse, the separator 14 can swing towards the direction of the second spiral groove 1122, and the end face of the second spiral groove 1122 can limit the position of the separator 4 to support the separator 14.

[0094] Please refer to Figure 15 and Figure 16 As shown in the figure, the separator 14 includes a separating section 141, an insertion section 142 and a first rotating shaft 143. The separating section 141 is located between the two spiral grooves 112. The first rotating shaft 143 is connected to the separating section 141 to support the separating section 141. The insertion section 142 is connected to the separating section 141. The insertion section 142 is inserted into the first oil hole 113. Then, when the separator 14 swings towards the direction of one spiral groove 112, the communication area between the spiral groove 112 and the first oil hole 113 can be better reduced, or the communication part between the spiral groove 112 and the first oil hole 113 can be blocked. Moreover, the inner surface of the first oil hole 113 can also support and position the insertion section 142, and further support and position the separator 14.

[0095] Please refer to Figures 17 to 18 , Figure 17 which is a schematic side view structure diagram of the crankshaft 10 provided in this embodiment. Figure 18 which is a schematic structure diagram of the separator 14 in the crankshaft 10 provided in this embodiment. The structure of this embodiment is based on Figure 15Modifications based on [the previous structure]. In this embodiment, the separator 14 includes a separating section 141 and a first rotating shaft 143. The separating section 141 is located between two spiral grooves 112, and the first rotating shaft 143 is connected to the separating section 141 to support the separating section 141. When the separator 14 swings towards one spiral groove 112, the end face of this spiral groove 112 is used to support and position the separating section 141, so as to reduce the communication area between this spiral groove 112 and the first oil hole 113, or block the communication part between this spiral groove 112 and the first oil hole 113. The structure of this separator 14 is simpler, easier to manufacture, has a low cost, is convenient to assemble, and can also rotate more flexibly on the main shaft 11.

[0096] Please refer to Figures 19 to 23 , Figure 19 which is the front view structural schematic diagram of the crankshaft provided in this embodiment. Figure 20 which is the front view structural schematic diagram of the crankshaft 10 provided in this embodiment when it rotates forward. Figure 21 which is the front view structural schematic diagram of the crankshaft 10 provided in this embodiment when it rotates backward. Figure 22 which is the side view structural schematic diagram of the crankshaft 10 provided in this embodiment. Figure 23 which is the structural schematic diagram of the separator 14 in the crankshaft 10 provided in this embodiment. The structure of this embodiment is a modification based on Figure 12 [the previous structure]. In this embodiment, the two spiral grooves 112 have an intersecting intersection area 1120. Along the axial direction of the main shaft 11, the intersection area 1120 is located between the first oil hole 113 and the second oil hole 114. That is to say, the spiral angles of the two spiral grooves 112 are relatively large. For example, the spiral angle of the spiral groove 112 can be set to be greater than 180 degrees. One spiral groove 112 divides the other spiral groove 112 into two segments, so the intersection area 1120 divides the lower side wall of each spiral groove 112 into two segments, that is, the lower side wall of each spiral groove 112 is divided by the intersection area 1120 into two segments that are spaced apart along the axial direction of the main shaft 11. The two segments of the lower side wall of each spiral groove 112 are also located on both sides of the other spiral groove 112, that is, each spiral groove 112 divides the lower side wall of the other spiral groove 112 into two segments at the intersection area 1120. The lower side wall of the spiral groove 112 refers to the side wall of the spiral groove 112 on the side away from the eccentric shaft 12 along the axial direction of the main shaft 11.

[0097] The crankshaft 10 further includes a movable stopper 15, which is used to connect the two lower sidewalls of the spiral groove 112. The two lower sidewalls are separated by the corresponding intersection area 1120, and the spiral direction of the spiral groove 112 is opposite to the rotation direction of the crankshaft 10. That is to say, the movable stopper 15 is used to connect the two lower sidewalls of the spiral groove 112 with a spiral direction opposite to the rotation direction of the crankshaft 10, which are separated by another spiral groove 112 at the intersection area 1120. The movable stopper 15 is located in the intersection area 1120, and the lower end of the movable stopper 15 is rotatably installed on the main shaft 11. The lower end of the movable stopper 15 refers to the end of the movable stopper 15 close to the oil suction cavity 111. The movable stopper 15 can swing in the intersection area 1120. When the crankshaft 10 rotates, the spiral groove 112 with a spiral direction opposite to the rotation direction of the crankshaft 10 pumps oil to the distribution oil passage 121. Since the movable stopper 15 connects the two lower sidewalls of the spiral groove 112, the lubricating oil pumped by the spiral groove 112 can flow through the movable stopper 15, so that the spiral groove 112 can pump oil smoothly and continuously. Furthermore, oil can be pumped along the entire spiral length of the spiral groove 112, improving the oil pumping capacity. In addition, the movable stopper 15 can also block one end of another spiral groove 112 in the intersection area 1120 and away from the eccentric shaft 12, preventing the lubricating oil from flowing back into another spiral groove 112 from the intersection area 1120.

[0098] Please refer to Figure 20 , when the crankshaft 10 rotates forward, the second spiral groove 1122 pumps oil to the distribution oil passage 121. The movable stopper 15 swings in the intersection area 1120 in the direction opposite to the rotation direction of the crankshaft 10. Then the movable stopper 15 connects the two lower sidewalls of the second spiral groove 1122 separated at the intersection area 1120, and blocks the part of the first spiral groove 1121 close to the second oil hole 114. In this way, the lubricating oil pumped by a section of the second spiral groove 1122 close to the second oil hole 114 can flow through the movable stopper 15 to a section of the second spiral groove 1122 away from the second oil hole 114, so as to achieve smooth and continuous oil pumping along the entire spiral length of the second spiral groove 1122 and improve the oil pumping capacity.

[0099] Similarly, please refer to Figure 21 , when the crankshaft 10 rotates reversely, the first spiral groove 1122 pumps oil to the distribution oil passage 121. The movable stopper 15 swings in the intersection area 1120 in the direction opposite to the rotation direction of the crankshaft 10. Then the movable stopper 15 connects the two lower sidewalls of the first spiral groove 1122 separated at the intersection area 1120, and blocks the part of the second spiral groove 1121 close to the second oil hole 114. In this way, the lubricating oil pumped by a section of the first spiral groove 1122 close to the second oil hole 114 can flow through the movable stopper 15 to a section of the first spiral groove 1122 away from the second oil hole 114, so as to achieve smooth and continuous oil pumping along the entire spiral length of the first spiral groove 1122 and improve the oil pumping capacity.

[0100] In one embodiment, the lower end of the movable stopper 15 is located at the intersection of the lower sidewalls of the two spiral grooves 112. That is to say, the lower end of the movable stopper 15 is rotatably mounted at the intersection of the lower sidewalls of the two spiral grooves 112. In this way, it is only necessary for the upper end of the movable stopper 15 to be able to overlap on the lower sidewall of a section of the spiral groove 112 away from the second oil hole 114, which can facilitate the determination of the length of the movable stopper 15 and the installation of the movable stopper 15, and is convenient for assembly. It can be understood that the position of the movable stopper 15 near the lower end can also be rotatably mounted on the main shaft 11, as long as the two ends of the movable stopper 15 can be connected to the lower sidewalls of two sections of the spiral groove 112 with a spiral direction opposite to the rotation direction of the crankshaft 10 and separated by another spiral groove 112 in the intersection area 1120.

[0101] In one embodiment, please refer to Figure 22 and Figure 23 , a second rotating shaft 151 is connected to the lower end of the movable stopper 15. A corresponding second shaft hole 118 is formed on the main shaft 11. The second rotating shaft 151 is inserted into the second shaft hole 118, and the second rotating shaft 151 can rotate in the second shaft hole 118, so that the movable stopper 15 can swing in the intersection area 1120. This structure is simple, convenient for processing and manufacturing, low in cost, and convenient for assembly. It can be understood that a shaft pin can also be provided on the main shaft 11, and the movable stopper 15 is rotatably connected to the shaft pin, or the movable stopper 15 can be rotatably mounted on the main shaft 11.

[0102] In one embodiment, the movable stopper 15 can be a stop rod or a baffle. Of course, the movable stopper 15 can also be a stop shaft, as long as it can guide the flow of lubricating oil in one spiral groove 112 and block the other spiral groove 112.

[0103] In one embodiment, the two spiral grooves 112 can have one, two, three, four, five or other numbers of intersection areas 1120. Specifically, it can be set according to needs. For example, when one intersection area 1120 is set, the spiral angle of each spiral groove 112 is 360 degrees. The more the number of intersection areas 1120 is set, the larger the spiral angle of the corresponding spiral groove 112 is.

[0104] In one embodiment, the second rotating shaft and the movable stopper 15 can be integrally formed to facilitate processing and manufacturing and ensure the connection strength between the second rotating shaft and the movable stopper 15.

[0105] Please refer to Figures 24 to 25 , Figure 24 which is the front view structural schematic diagram of the crankshaft provided in this embodiment. Figure 25 which is the side view structural schematic diagram of the crankshaft 10 provided in this embodiment. The structure of this embodiment is Figure 19Modifications based on this. In this embodiment, the separator 14 is fixed to the main shaft 11. For the specific fixing method, reference can be made to the descriptions of the embodiments in which the separator 14 is fixed to the main shaft 11 above, and details will not be repeated here.

[0106] The embodiment of the present application also provides a compressor. Please refer to Figure 2 , which includes the crankshaft 10 described in any of the above embodiments. The compressor uses the crankshaft 10 of any of the above embodiments. When the compressor rotates forward and backward, it can ensure good oil supply, ensure stable operation, and extend the service life. The compressor also has the technical effects of the crankshaft 10 in the above embodiments, and details will not be repeated here.

[0107] The embodiment of the present application also provides a refrigeration device, which includes the compressor described in any of the above embodiments. The refrigeration device uses the above compressor, operates more stably, has a long service life, and also has the technical effects of the compressor in the above embodiments, and details will not be repeated here.

[0108] The refrigeration device in the embodiment of the present application can be an air conditioner, a refrigerator, an outdoor unit, etc.

[0109] The above are only optional embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A compressor, characterized in that: including a crankshaft; The crankshaft includes a crank, a main shaft disposed on one side of the crank, and an eccentric shaft disposed on the other side of the crank. An oil suction cavity is provided at one end of the main shaft away from the eccentric shaft. A distribution oil passage extending into the main shaft is provided in the eccentric shaft. A first oil hole communicating with the distribution oil passage is formed in the main shaft. Two spiral grooves are axially formed on the outer peripheral surface of the main shaft along the axis of the main shaft. The spiral directions of the two spiral grooves are opposite. One end of each spiral groove communicates with the first oil hole. A second oil hole communicating the oil suction cavity with the spiral groove is further formed in the main shaft. It is characterized in that: the crankshaft further includes a separator for separating one ends of the two spiral grooves close to the first oil hole, and the separator is disposed on the main shaft.

2. The compressor according to claim 1, characterized in that: The separator partially extends into the first oil hole.

3. The compressor according to claim 1, characterized in that: The separator divides the first oil hole into two sub-oil holes. The two sub-oil holes communicate with the two spiral grooves respectively, and the two sub-oil holes communicate with the distribution oil passage.

4. The compressor according to claim 1, characterized in that: The separator partially extends into the distribution oil passage.

5. The compressor according to claim 1, characterized in that: Positioning grooves are formed on opposite sides of the inner surface of the first oil hole, and both sides of the separator are respectively inserted into the two positioning grooves.

6. The compressor according to claim 1, characterized in that: A first rotating shaft is provided at the lower end of the separator, and a first shaft hole is correspondingly formed in the main shaft. The first rotating shaft is rotatably installed in the first shaft hole.

7. The compressor according to claim 6, characterized in that: The length of the separator along the axis of the main shaft is greater than the width of the spiral groove, and the length of the separator along the axis of the main shaft is less than the inner diameter of the first oil hole.

8. The compressor according to claim 1, characterized in that: The separator includes a separating section fitted between the two spiral grooves and an inserting section inserted into the first oil hole, and the inserting section is fixed in the first oil hole.

9. The compressor according to claim 8, characterized in that: The inserting section is fixed in the first oil hole by interference fit; or, the inserting section is welded to the first oil hole; or, the inserting section is bonded to the first oil hole.

10. The compressor according to claim 1, characterized in that: The crankshaft further includes a fastening structure for fixing the separator to the main shaft, and the fastening structure is fixedly connected to the main shaft.

11. The compressor according to any one of claims 1-10, characterized in that: The pitches of the two spiral grooves are equal.

12. The compressor according to any one of claims 1 to 10, characterized in that: The number of the second oil holes is one, and the other ends of the two spiral grooves intersect at the second oil hole.

13. A refrigeration device, characterized in that: including a compressor according to any one of claims 1-12.

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