A crankshaft of a compressor, a compressor and an air conditioner

Abstract

The application provides a crankshaft of a compressor, a compressor and an air conditioner. The crankshaft of the compressor comprises a crankshaft body and a shaft shoulder. The shaft shoulder is protrudedly arranged on the outer periphery of the crankshaft body. The inside of the shaft shoulder is provided with a crankshaft oil passage. The upper end of the shaft shoulder is provided with an oil pool. One end of the crankshaft oil passage is communicated with the oil pool, and the other end of the crankshaft oil passage can guide oil out of the shaft shoulder. A sliding part is further arranged on the shaft shoulder. The sliding part is arranged at the position of the crankshaft oil passage. The sliding part can move integrally with the crankshaft. The centrifugal force of the sliding part can drive the sliding part to move to the radial outside to open the crankshaft oil passage. The opening degree of the sliding part to open the crankshaft oil passage is proportional to the centrifugal force received by the sliding part. According to the application, more lubricating oil is provided when the frequency is large, and too much lubricating oil is not provided when the frequency of the compressor is small. The problem that the oil supply structure cannot change with the frequency and causes the unreasonable size of the oil supply amount of the pump body at high and low frequencies is solved.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, specifically to a compressor crankshaft, a compressor, and an air conditioner. Background Technology

[0002] Scroll compressors are widely used in air conditioning and heat pump systems due to their high efficiency, small size, and stable operation. Generally, a scroll compressor consists of a closed casing, a moving scroll, a stationary scroll, a frame, a crankshaft, anti-rotation slip rings, a motor, and an oil supply system.

[0003] The compressor uses an oil supply system to supply refrigerant oil from the oil sump to various components. A portion is supplied to the bearings via the crankshaft, and another portion is supplied to the contact surfaces of the moving and stationary scroll plates. Before supplying the refrigerant oil to the contact surfaces of the moving and stationary scroll plates, the structure accumulates the high-pressure refrigerant oil supplied by the oil supply system in a high-pressure oil sump formed by the back of the moving scroll plate and the upper support. Therefore, an oil supply mechanism is also needed to supply the aforementioned high-pressure refrigerant oil to the end faces of the moving and stationary scroll plates.

[0004] However, the existing sealing ring's oil supply structure cannot supply oil according to frequency, resulting in an unreasonable oil supply volume between high and low frequencies. Furthermore, the existing oil supply method causes the oil temperature to be high during high-frequency operation, which reduces the viscosity of the lubricating oil and worsens the lubrication effect. This leads to the problem of poor oil supply performance in the existing compressor pump.

[0005] Because the oil supply structure of the existing scroll compressor cannot change with the frequency, there are technical problems such as insufficient lubrication when a large amount of oil is needed for the friction parts, and excessive lubrication when a large amount of oil is not needed for the friction parts, resulting in waste. Therefore, this invention studies and designs a crankshaft of a compressor, a compressor, and an air conditioner. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the oil supply structure of the scroll compressor in the prior art, which cannot supply oil with frequency, resulting in insufficient lubrication when a large amount of oil is needed for the friction parts, and excessive lubrication when a large amount of oil is not needed for the friction parts, resulting in waste. Thus, the present invention provides a crankshaft of a compressor, a compressor, and an air conditioner.

[0007] To address the above problems, the present invention provides a crankshaft for a compressor, comprising:

[0008] The crankshaft comprises a main body and a shoulder. The shoulder protrudes from the outer periphery of the main body and has a crankshaft oil passage inside. The upper end of the shoulder has an oil reservoir. One end of the crankshaft oil passage is connected to the oil reservoir, and the other end allows oil to be discharged from the shoulder. A sliding part is also provided on the shoulder. The sliding part is located at the position of the crankshaft oil passage and can move as part of the crankshaft. Through the centrifugal force of the sliding part, the sliding part can be driven to move radially outward, thereby opening the crankshaft oil passage. The frequency of the compressor is proportional to the rotational speed of the crankshaft, the centrifugal force on the sliding part is proportional to the rotational speed, and the opening degree of the sliding part in opening the crankshaft oil passage is proportional to the centrifugal force on the sliding part.

[0009] In some embodiments, the crankshaft oil passage includes a first oil passage and a second oil passage. The upper end of the first oil passage is connected to the oil reservoir and the lower end extends downward. One end of the second oil passage is connected to the lower end of the first oil passage and the other end extends to the end face of the shaft shoulder. The sliding part is disposed at the position of the first oil passage, and the sliding part can be driven by its centrifugal force to open the first oil passage or automatically adjust the opening degree of the first oil passage.

[0010] In some embodiments, a groove is provided inside the portion of the shoulder located at the radially outer end of the first oil passage, and at least a portion of the sliding part is disposed in the groove. The sliding part can be driven by its own centrifugal force to move along the groove, thereby opening the first oil passage or automatically adjusting the opening degree of the first oil passage according to the magnitude of the centrifugal force.

[0011] In some embodiments, the groove is further provided with an elastic part, one end of which is connected to the radial outer end of the sliding part and the other end is connected to the bottom of the groove. The sliding part can be driven by the elastic force of the elastic part, so that at least a part of the structure of the sliding part moves into the first oil circuit to close the first oil circuit or automatically adjusts the opening of the first oil circuit according to the magnitude of the centrifugal force.

[0012] In some embodiments, when the crankshaft speed increases, the centrifugal force on the sliding part increases, the volume of the sliding part moving into the groove increases, and the elastic part is compressed. At this time, the opening degree of the sliding part opening the first oil passage increases. When the crankshaft speed decreases, the centrifugal force on the sliding part decreases, the elastic force of the elastic part acts on the sliding part and reduces the volume of the sliding part moving into the groove. At this time, the opening degree of the sliding part opening the first oil passage decreases.

[0013] In some embodiments, the first oil passage extends along the axial direction of the crankshaft, the second oil passage extends along the radial direction of the crankshaft, and the groove also extends along the radial direction of the crankshaft.

[0014] In some embodiments, a plurality of crankshaft oil passages are provided at intervals in the circumferential direction of the shoulder, and there are also a plurality of sliding parts, with each sliding part corresponding to one of the crankshaft oil passages, and each crankshaft oil passage is provided with a sliding part.

[0015] In some embodiments, an eccentric portion is also included, which is axially connected to the shoulder. A crankshaft central oil passage is provided inside the crankshaft extending axially, which extends through to the axial end face of the eccentric portion and can deliver oil to the oil reservoir.

[0016] The present invention also provides a compressor comprising a crankshaft of the compressor described in any of the preceding claims, and further comprising a bracket and a moving scroll plate. The bracket is sleeved on the outer periphery of the crankshaft and can be used to support the moving scroll plate. The bracket, the moving scroll plate, and the shoulder form an oil reservoir. A third oil passage is provided inside the bracket. The crankshaft oil passage on the shoulder is rotatable to engage with the third oil passage of the bracket, so that the crankshaft oil passage is connected to the third oil passage, so that oil in the oil reservoir is discharged through the crankshaft oil passage and then through the third oil passage.

[0017] In some embodiments, a stationary vortex disk is also included, which is connected to the support. The stationary vortex disk has an internal oil passage, and the support also has an annular oil passage, which is a semi-annular oil groove or an arc-shaped oil groove opened inside the support. The support also has a fourth oil passage. The third oil passage, the annular oil passage, the fourth oil passage, and the stationary vortex disk oil passage are connected in sequence. The stationary vortex disk oil passage can guide oil to the friction part between the stationary vortex disk and the moving vortex disk.

[0018] In some embodiments, the third oil passage includes a third radial oil passage and a third axial oil passage. The third radial oil passage extends in the radial direction, and the third axial oil passage extends in the axial direction. The inner radial end of the third radial oil passage can communicate with the crankshaft oil passage during the rotation of the shoulder. The outer radial end of the third radial oil passage is connected to one axial end of the third axial oil passage, and the other axial end of the third axial oil passage is connected to the annular oil passage.

[0019] In some embodiments, the support includes a first support and a second support, the first support and the second support being spliced ​​together axially, the second support being in contact with the shoulder of the crankshaft, the first support being in contact with the stationary vortex disk, the third oil passage being disposed on the second support, the annular oil passage being disposed on the contact surface between the first support and the second support, and the fourth oil passage being disposed on the first support.

[0020] In some embodiments, the fourth oil passage extends along the axial direction and is located at an axially opposite position where the first support and the stationary vortex disk are connected. The stationary vortex disk oil passage is also located on the stationary vortex disk and at an axially opposite position where it is connected to the first support.

[0021] In some embodiments, the shoulder of the crankshaft is radially aligned with the bracket:

[0022] A crankshaft oil supply ring groove is provided on the shoulder and on the end face that abuts the bracket; and / or, a bracket oil supply ring groove is provided on the end face that abuts the shoulder.

[0023] The present invention also provides an air conditioner comprising the compressor described in any of the preceding claims.

[0024] The crankshaft of the compressor, the compressor, and the air conditioner provided by this invention have the following beneficial effects:

[0025] 1. This invention, through a crankshaft oil passage provided on the crankshaft shoulder, can guide oil from the oil reservoir to the required lubrication points (e.g., between the stationary and moving scroll plates in the compression chamber). Furthermore, through the provision of a sliding part, the sliding part can move integrally with the crankshaft and can be driven by the centrifugal force of the sliding part to control the opening of the crankshaft oil passage. That is, the higher the compressor frequency, the higher the crankshaft speed, and therefore the greater the centrifugal force on the sliding part. At this time, the sliding part controls the opening of the crankshaft oil passage to be larger. Conversely, the lower the compressor frequency, the smaller the opening of the crankshaft oil passage is automatically controlled, thereby enabling the scroll pressure... The oil supply of the compressor's oil supply structure varies with frequency. At high frequencies, when friction is more severe at the friction points, the sliding part is automatically controlled by centrifugal force to provide more lubricating oil, thus ensuring lubrication of the friction points. Conversely, at low compressor frequencies, when friction is less, the sliding part is automatically controlled by centrifugal force to reduce the amount of lubricating oil, thus preventing excessive lubrication. This solves the problem of the oil supply structure not changing with frequency, which leads to unreasonable oil supply at high and low frequencies. It can stably control the oil supply to the pump end face, ensure pump lubrication during high-frequency operation, and enhance compressor reliability.

[0026] 2. In this invention, the lubricating oil is directly supplied to the pump body end face from the high-pressure oil sump of the compressor (i.e., the oil reservoir is provided by the crankshaft center oil hole, which is a high-pressure oil sump), ensuring a stable oil supply. At the same time, the lubricating oil inlet is located at the bottom of the oil reservoir, which can effectively ensure sufficient oil supply at the supply end in the oil supply path. Through the setting of the annular oil passage on the bracket, the lubricating oil enters the upper bracket from the high-pressure oil sump and then passes through the annular oil passage of the bracket, which effectively increases the flow path, thereby effectively reducing the oil temperature and further increasing the viscosity of the lubricating oil, thus improving the lubrication effect of the pump body. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall oil circuit of the compressor of the present invention;

[0028] Figure 1a yes Figure 1 A magnified view of part A;

[0029] Figure 2 This invention ( Figure 1 Top view of the oil supply crankshaft (in the middle);

[0030] Figure 3 This is a schematic diagram showing that the radial oil passage of the oil supply crankshaft of the present invention is not connected to the radial oil passage of the upper support;

[0031] Figure 4 This is a schematic diagram showing the connection between the radial oil passage of the oil supply crankshaft and the radial oil passage of the upper support in this invention;

[0032] Figure 5 This is a schematic diagram of the switch when there is no slider in the radial oil circuit of the oil supply crankshaft of the present invention;

[0033] Figure 6 This is a schematic diagram of the closed state of the radial oil passage of the oil supply crankshaft according to the present invention;

[0034] Figure 7 This is a schematic diagram showing the open state of the radial oil passage of the oil supply crankshaft according to the present invention;

[0035] Figure 8 This is a cross-sectional view of the shoulder and bracket fitting in alternative embodiment 2 of the present invention;

[0036] Figure 8a yes Figure 8 A partial longitudinal section of the shoulder of the shaft;

[0037] Figure 9 This is a cross-sectional view of the shoulder and bracket fitting in alternative embodiment 3 of the present invention;

[0038] Figure 9a yes Figure 9 Partial longitudinal section of the support structure.

[0039] The reference numerals in the attached figures are as follows:

[0040] 1. Static scroll plate; 11. Static scroll plate oil passage; 2. Moving scroll plate; 3. Cross slip ring; 4. Support; 41. First support; 42. Second support; 43. Third oil passage; 431. Third radial oil passage; 432. Third axial oil passage; 44. Annular oil passage; 45. Fourth oil passage; 5. Oil reservoir; 6. Crankshaft; 6a. Crankshaft body; 6b. Shoulder; 6c. Eccentric part; 61. Crankshaft center oil passage; 62. Elastic part; 63. Sliding part; 64. Crankshaft oil passage; 641. First oil passage; 642. Second oil passage; 65. Groove; 7. Oil pump; 8. Bottom oil reservoir; 9. Crankshaft oil supply ring groove; 10. Support oil supply ring groove. Detailed Implementation

[0041] like Figure 1-9 As shown, the present invention provides a crankshaft for a compressor, comprising:

[0042] The crankshaft comprises a main body 6a and a shoulder 6b. The shoulder 6b protrudes from the outer periphery of the main body 6a and has a crankshaft oil passage 64 inside. The upper end of the shoulder 6b has an oil reservoir 5. One end of the crankshaft oil passage 64 is connected to the oil reservoir 5, and the other end can discharge oil to the shoulder 6b. A sliding part 63 is also provided on the shoulder 6b. The sliding part 63 is located at the position of the crankshaft oil passage 64. The sliding part 63 can move as part of the crankshaft 6. The centrifugal force of the sliding part 63 can drive the sliding part 63 to move radially outward, thereby opening the crankshaft oil passage 64. The frequency of the compressor is proportional to the rotational speed of the crankshaft 6. The centrifugal force on the sliding part 63 is proportional to the rotational speed. The opening degree of the sliding part 63 in opening the crankshaft oil passage 64 is proportional to the centrifugal force on the sliding part 63.

[0043] This invention utilizes a crankshaft oil passage located on the crankshaft shoulder to guide oil from the oil reservoir to the required lubrication points (e.g., between the stationary and moving scroll plates in the compression chamber). Furthermore, the invention employs a sliding component that moves integrally with the crankshaft and is driven by its centrifugal force to control the opening of the crankshaft oil passage. Specifically, the higher the compressor frequency, the higher the crankshaft speed, resulting in a greater centrifugal force on the sliding component, thus increasing the opening of the crankshaft oil passage. Conversely, a lower compressor frequency automatically reduces the opening of the crankshaft oil passage, thereby enhancing the scroll compression... The oil supply of the compressor's oil supply structure varies with frequency. At high frequencies, when friction is more severe at the friction points, the sliding part is automatically controlled by centrifugal force to provide more lubricating oil, thus ensuring lubrication of the friction points. Conversely, at low compressor frequencies, when friction is less, the sliding part is automatically controlled by centrifugal force to reduce the amount of lubricating oil, thus preventing excessive lubrication. This solves the problem of the oil supply structure not changing with frequency, leading to unreasonable oil supply at high and low frequencies. It can stably control the oil supply at the pump end face, ensuring pump lubrication during high-frequency operation and enhancing compressor reliability.

[0044] To ensure that the lubricating oil in the high-pressure oil sump can be directly supplied to the end faces of the moving and stationary scroll plates and to guarantee high-frequency oil supply, this invention proposes a novel crankshaft structure. This structure can adjust the amount of lubricating oil supplied to the end faces of the moving and stationary scroll plates according to the compressor's operating frequency while maintaining a sealed environment. This invention is simple in principle, highly practical, and reliable. The structure can change its oil supply according to frequency, ensuring volumetric efficiency of the compressor at low frequencies while increasing the high-frequency oil supply, preventing pump body wear due to insufficient oil supply at high frequencies.

[0045] The present invention provides a crankshaft that can supply oil to the end faces of the moving and stationary discs. The crankshaft can intermittently deliver lubricating oil to the end face of the pump body, and its oil supply can increase with the increase of frequency.

[0046] The shaft includes axial and radial oil passages. Its radial oil passage is connected to the oil passage of the upper support. At the same time, the axial oil passage of the crankshaft includes a mechanism for controlling the size of the oil passage. The size of the oil passage can be controlled by different rotational speeds, thereby controlling the oil supply of the pump body.

[0047] The compressor upper bracket is provided with an annular groove. When the lubricating oil passes through the annular groove, the lubricating oil temperature can be reduced, the lubricating oil viscosity can be increased, and its lubrication effect can be enhanced.

[0048] The crankshaft has at least one oil passage with a controllable inlet area, and the upper support is provided with an annular groove with a cross-section not limited to a circle.

[0049] The compressor oil circulation pattern is as follows: bottom oil sump—oil pump—crankshaft—high pressure oil sump (oil reservoir)—crankshaft radial oil circuit—upper bracket annular groove—stationary disc oil circuit—moving and stationary disc end faces.

[0050] This invention solves the following technical problems:

[0051] 1. The existing compressor pump body has a poor oil supply effect;

[0052] 2. The existing sealing ring oil supply structure does not change with frequency, resulting in an unreasonable amount of oil supplied to the pump body at high and low frequencies.

[0053] 3. The existing pump body oil supply method has the problem of high oil temperature, reduced lubricating oil viscosity, and poor lubrication effect during high-frequency operation.

[0054] In some embodiments, the crankshaft oil passage 64 includes a first oil passage 641 and a second oil passage 642. The upper end of the first oil passage 641 is connected to the oil reservoir 5 and the lower end extends downward. One end of the second oil passage 642 is connected to the lower end of the first oil passage 641 and the other end extends to the end face of the shoulder 6b. The sliding part 63 is disposed at the position of the first oil passage 641, and the sliding part 63 can be driven by its centrifugal force to open the first oil passage 641 or automatically adjust the opening degree of the first oil passage 641. This is a preferred structural form of the crankshaft oil circuit of the present invention, which includes a first oil circuit and a second oil circuit. The first oil circuit is used to connect to the oil reservoir to introduce oil, and the second oil circuit is used to connect to the first oil circuit and guide the oil to the position that needs lubrication and cooling. The sliding part is disposed at the position of the first oil circuit, so that the sliding part is driven to move by centrifugal force and automatically adjusts the opening of the first oil circuit. The automatic adjustment is based on the magnitude of the centrifugal force, so that more lubricating oil is provided at high frequencies to improve the lubrication effect, and less lubricating oil is provided at low frequencies to reduce lubricating oil waste.

[0055] See Figure 1 The lubricating oil of the scroll compressor is stored in the bottom oil sump 8. The rotation of the crankshaft 6 drives the oil pump 7 to supply the lubricating oil in the bottom oil sump 8 to different parts of the compressor, including the bearings and the high-pressure oil sump (oil reservoir 5), through the crankshaft oil passage 64 (including the first oil passage 641 and the second oil passage 642). The lubricating oil in the high-pressure oil sump flows through the radial oil passage (third oil passage 43) of the upper bracket, through the annular oil passage 44 of the upper bracket, and finally through the axial oil passage (i.e., the fourth oil passage 45) of the upper bracket and the oil passage opened on the stationary scroll (stationary scroll oil passage 11) to the contact surface of the moving and stationary scrolls, realizing the oil supply and lubrication of the pump body. At the same time, the annular oil passage 44 of the upper bracket can reduce the temperature of the lubricating oil in the high-pressure oil sump, thereby increasing the viscosity of the lubricating oil, so that the pump body is fully lubricated and the pump body reliability is increased.

[0056] In some embodiments, a groove 65 is provided inside the portion of the shoulder 6b located at the radially outer end of the first oil passage 641. At least a portion of the sliding part 63 is disposed in the groove 65. The sliding part 63 can be driven by its own centrifugal force to move along the groove 65, thereby opening the first oil passage 641 or automatically adjusting the opening degree of the first oil passage 641 according to the magnitude of the centrifugal force. By providing a groove on the shoulder located radially outer of the first oil passage, the present invention allows at least a portion of the sliding part to be disposed in the groove, enabling the sliding part to move along the direction of the groove. This effectively controls the opening and closing of the first oil passage and automatically controls the opening degree of the first oil passage according to the magnitude of the centrifugal force. The groove is preferably in communication with the first oil passage.

[0057] In some embodiments, an elastic portion 62 is further provided in the groove 65. One end of the elastic portion 62 is connected to the radially outer end of the sliding portion 63, and the other end is connected to the bottom of the groove 65. The sliding portion 63 can be driven by the elastic force of the elastic portion 62, causing at least a portion of the structure of the sliding portion 63 to move into the first oil passage 641 to close the first oil passage 641, or automatically adjust the opening of the first oil passage 641 according to the magnitude of the centrifugal force. The sliding portion of the present invention is a cuboid slider, and the elastic portion is preferably a spring. The present invention also provides a restoring force for the sliding portion in the direction of closing the first oil passage by providing the elastic portion, so that when the compressor frequency decreases, the sliding portion can be pushed back by the elastic force, thereby reducing the opening of the first oil passage and achieving the effect of providing less lubricating oil at low frequencies.

[0058] See also Figures 6-7 A crankshaft spring (elastic part 62) and a crankshaft slider (sliding part 63) are installed in the crankshaft axial oil passage (first oil passage 641). The centrifugal force of the crankshaft 6 rotation resists the elastic force of the crankshaft spring, thereby shifting the sliding part 63 outward, opening the oil supply passage (first oil passage 641) and the second oil passage 642 to achieve oil supply. This oil supply method can change the oil supply of the pump body according to the compressor operating frequency. Springs with different elastic coefficients can be installed in multiple crankshaft axial oil passages (first oil passage 641), and different numbers of crankshaft radial oil supply passages (second oil passage 642) can be opened as the compressor frequency increases to ensure high-frequency oil supply to the compressor.

[0059] In some embodiments, when the crankshaft speed increases, the centrifugal force on the sliding part 63 increases, the volume of the sliding part 63 moving into the groove 65 increases, and the elastic part 62 is compressed. At this time, the opening degree of the sliding part 63 opening the first oil passage 641 increases. When the crankshaft speed decreases, the centrifugal force on the sliding part 63 decreases, the elastic force of the elastic part 62 acts on the sliding part 63, and the volume of the sliding part 63 moving into the groove 65 decreases. At this time, the opening degree of the sliding part 63 opening the first oil passage 641 decreases. In this invention, when the crankshaft speed increases, the increased centrifugal force on the sliding part leads to an increased volume of the sliding part moving into the groove, which increases the opening degree of the first oil passage, achieving the effect of providing more lubricating oil during high-frequency operation. When the crankshaft speed decreases, the decreased centrifugal force on the sliding part causes the sliding part to move towards the first oil passage under the action of the elastic force of the elastic part, thereby reducing the opening degree of the first oil passage, achieving the effect of providing less lubricating oil during low-frequency operation.

[0060] In some embodiments, the first oil passage 641 extends along the axial direction of the crankshaft 6, the second oil passage 642 extends along the radial direction of the crankshaft 6, and the groove 65 also extends along the radial direction of the crankshaft 6. This is a preferred extension of the first oil passage, the second oil passage, and the groove of the present invention. The first oil passage extends along the axial direction, and the oil reservoir is located above the first oil passage to maximize the intake of lubricating oil. The extension direction of the groove is perpendicular to the extension direction of the first oil passage, thereby enabling control of opening or closing the first oil passage perpendicular to the extension direction of the first oil passage when the sliding part moves along the direction of the groove, as well as control of the opening degree of the first oil passage.

[0061] In some embodiments, a plurality of crankshaft oil passages 64 are spaced apart in the circumferential direction on the shoulder 6b, and a plurality of sliding parts 63 are also provided, with each sliding part 63 corresponding to one of the crankshaft oil passages 64, and each crankshaft oil passage 64 is provided with a sliding part 63. The present invention also enables an increase in the amount of oil connected to the third oil passage of the support during crankshaft rotation by providing multiple crankshaft oil passages and multiple sliding parts, thereby increasing the amount of lubricating oil.

[0062] See Figures 2-4 The crankshaft shoulder is provided with multiple crankshaft oil passages 64. After the second oil passage 642 runs to a fixed angle, it can be connected to the radial oil outlet hole of the upper bracket (third oil passage 43). The crankshaft can be connected to the radial oil outlet hole of the upper bracket (third oil passage 43) at a fixed angle for each revolution, thereby realizing stable oil supply to the pump body. At the same time, the number of crankshaft oil outlet holes can be adjusted according to the compressor operating frequency range and the lubricating oil demand of the pump body.

[0063] In some embodiments, an eccentric portion 6c is also included, which is axially connected to the shoulder 6b. A crankshaft central oil passage 61 extends axially inside the crankshaft and penetrates to the axial end face of the eccentric portion 6c, delivering oil to the oil reservoir 5. The eccentric portion of this invention is used to cooperate with the moving disc to drive its movement, and the central oil passage extends to the top of the eccentric portion, thereby achieving the effect of drawing oil from the bottom oil reservoir and delivering it to the oil reservoir. In this invention, the lubricating oil is directly supplied to the pump body end face from the compressor's high-pressure oil reservoir (i.e., the oil reservoir is provided by the crankshaft central oil hole, which is a high-pressure oil reservoir), ensuring a stable oil supply. Simultaneously, the lubricating oil inlet is located at the bottom of the oil reservoir, effectively ensuring sufficient oil supply at the supply end in the oil supply path.

[0064] The present invention also provides a compressor (preferably a scroll compressor), which includes the crankshaft of the compressor described in any of the preceding claims, and further includes a bracket 4 and a moving scroll 2. The bracket 4 is sleeved on the outer periphery of the crankshaft 6 and can be used to support the moving scroll 2. The bracket 4, the moving scroll 2 and the shoulder 6b form the oil reservoir 5. A third oil passage 43 is provided inside the bracket 4. The crankshaft oil passage 64 on the shoulder 6b can rotate to be in contact with the third oil passage 43 of the bracket 4, so that the crankshaft oil passage 64 and the third oil passage 43 are connected, so that the oil in the oil reservoir 5 is discharged through the crankshaft oil passage 64 and then through the third oil passage 43.

[0065] The compressor of the present invention, through the cooperation between the bracket and the crankshaft, enables the third oil passage on the bracket to be intermittently connected with the crankshaft oil passage during rotation, thereby achieving an effective oil supply function.

[0066] The present invention has the following beneficial effects:

[0067] 1. The compressor supplies oil through openings in the crankshaft and upper bracket. At the same time, a centrifugal structure is set on the crankshaft. The opening and size of the crankshaft oil outlet are controlled according to the magnitude of the centrifugal force at different speeds, thereby controlling the oil supply to the pump body end face, ensuring pump body lubrication during high-frequency operation, and enhancing the reliability of the compressor.

[0068] 2. The lubricating oil is directly supplied from the high-pressure oil sump of the compressor to the pump body end face, ensuring a stable oil supply. At the same time, the lubricating oil inlet is located at the bottom of the oil sump, ensuring sufficient oil supply at the supply end in the oil supply path.

[0069] 3. After the lubricating oil enters the upper support from the high-pressure oil tank, its temperature decreases and its viscosity increases after passing through the annular groove of the upper support, thereby improving the lubrication effect of the pump body.

[0070] In some embodiments, a stationary vortex disk 1 is also included, which is connected to the support 4. The stationary vortex disk 1 is provided with a stationary vortex disk oil passage 11 inside. The support 4 is also provided with an annular oil passage 44, which is a semi-annular oil groove or an arc-shaped oil groove opened inside the support 4. The support 4 is also provided with a fourth oil passage 45. The third oil passage 43, the annular oil passage 44, the fourth oil passage 45 and the stationary vortex disk oil passage 11 are connected in sequence. The stationary vortex disk oil passage 11 can guide oil to the friction part between the stationary vortex disk 1 and the moving vortex disk 2. The present invention also effectively guides the oil in the oil reservoir through the shoulder, the support, and the stationary vortex disk to the moving and stationary vortex disks by setting up the annular oil passage, the fourth oil passage, and the stationary vortex disk oil passage on the support, thereby achieving effective lubrication and cooling. Furthermore, the annular oil passage on the support increases the flow path of the lubricating oil after it enters the upper support from the high-pressure oil reservoir, thereby effectively reducing the oil temperature and increasing the viscosity of the lubricating oil, thus improving the lubrication effect of the pump body.

[0071] In some embodiments, the third oil passage 43 includes a third radial oil passage 431 and a third axial oil passage 432. The third radial oil passage 431 extends radially, and the third axial oil passage 432 extends axially. The inner radial end of the third radial oil passage 431 can communicate with the crankshaft oil passage 64 during the rotation of the shoulder 6b. The outer radial end of the third radial oil passage 431 communicates with one axial end of the third axial oil passage 432, and the other axial end of the third axial oil passage 432 communicates with the annular oil passage 44. This is a preferred structural form of the third oil passage of the present invention. The third radial oil passage can transport oil radially, and the third axial oil passage can guide the oil in the third radial oil passage to the annular oil passage, thereby further increasing the length of the oil passage, further reducing the oil temperature, further increasing the viscosity of the lubricating oil, and further improving the lubrication effect on the pump body.

[0072] In some embodiments, the bracket 4 includes a first bracket 41 and a second bracket 42, which are axially joined together. The second bracket 42 is connected to the shoulder 6b of the crankshaft, and the first bracket 41 is connected to the stationary scroll plate 1. The third oil passage 43 is disposed on the second bracket 42, the annular oil passage 44 is disposed on the contact surface between the first bracket 41 and the second bracket 42, and the fourth oil passage 45 is disposed on the first bracket 41. This is a further preferred structural form of the bracket of the present invention. By using the split structure of the first and second brackets, the two are joined together to form a bracket, which can effectively process the annular oil passage 44, allowing the oil to be transported to the stationary scroll plate through a longer path inside the bracket, effectively reducing the oil temperature and improving the lubrication effect.

[0073] In some embodiments, the fourth oil passage 45 extends along the axial direction and is located at an axially opposite position where the first support 41 connects with the stationary vortex disk 1. The stationary vortex disk oil passage 11 is also located on the stationary vortex disk 1 and at an axially opposite position where it connects with the first support 41.

[0074] In some embodiments, the shoulder 6b of the crankshaft 6 is radially aligned with the bracket 4.

[0075] A crankshaft oil supply annular groove 9 is provided on the end face of the shoulder 6b that abuts with the bracket 4; and / or, a bracket oil supply annular groove 10 is provided on the end face of the bracket 4 that abuts with the shoulder 6b. The present invention also utilizes the crankshaft oil supply annular groove on the shoulder to increase the connectivity between the crankshaft oil passage and the third oil passage of the bracket, achieving long-term connectivity and thus ensuring continuous and effective oil supply; similarly, the bracket oil supply annular groove on the bracket also increases the connectivity between the crankshaft oil passage and the third oil passage of the bracket, achieving long-term connectivity and thus ensuring continuous and effective oil supply.

[0076] like Figure 8 In Embodiment 2, to ensure low-frequency oil supply to the compressor, a crankshaft oil supply annular groove 9 can be provided on the crankshaft shoulder, keeping the crankshaft oil passage 64 in continuous communication with the third oil passage 43 of the upper bracket. This ensures continuous oil supply while the crankshaft oil outlet (second oil passage 642) is open, further guaranteeing stable oil supply to the compressor. (The protection method involves an oil groove with a slider and spring, and the crankshaft oil supply annular groove 9 can be provided on the radial outer circumference of the second oil passage 642.)

[0077] like Figure 9In the embodiment shown in Example 3, in order to ensure low-frequency oil supply to the compressor, a support oil supply ring groove 10 can be set on the upper support to keep the crankshaft oil passage 64 and the third oil passage 43 of the upper support in a long-term connected state, so that oil is continuously supplied when the crankshaft oil outlet (second oil passage 642) is open, further ensuring stable oil supply to the compressor.

[0078] The present invention also provides an air conditioner comprising the compressor described in any of the preceding claims.

[0079] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A crankshaft for a compressor, characterized by: The crankshaft comprises: a crankshaft body (6a) and a shaft shoulder (6b) protruding from the outer periphery of the crankshaft body (6a), the inside of the shaft shoulder (6b) is provided with a crankshaft oil passage (64), the upper end of the shaft shoulder (6b) has an oil reservoir (5), one end of the crankshaft oil passage (64) communicates with the oil reservoir (5), the other end can guide oil out of the shaft shoulder (6b), the shaft shoulder (6b) is further provided with a sliding part (63), the sliding part (63) is arranged at the position of the crankshaft oil passage (64), the sliding part (63) can move integrally with the crankshaft (6), the sliding part (63) can be driven to move to the radial outside by the centrifugal force of the sliding part (63) to open the crankshaft oil passage (64), the frequency of the compressor is proportional to the rotating speed of the crankshaft (6), the centrifugal force acting on the sliding part (63) is proportional to the rotating speed, the opening degree of the sliding part (63) opening the crankshaft oil passage (64) is proportional to the centrifugal force acting on the sliding part (63); the crankshaft oil passage (64) comprises a first oil passage (641) and a second oil passage (642), the upper end of the first oil passage (641) communicates with the oil reservoir (5), the lower end extends downward, one end of the second oil passage (642) communicates with the lower end of the first oil passage (641), the other end extends to the end face of the shaft shoulder (6b), the sliding part (63) is arranged at the position of the first oil passage (641), the inside of the part of the shaft shoulder (6b) located at the radial outer end of the first oil passage (641) is provided with a groove (65), at least part of the structure of the sliding part (63) is arranged in the groove (65), the groove (65) is further provided with an elastic part (62).

2. The crankshaft of the compressor according to claim 1, wherein the sliding part (63) can be driven by the centrifugal force to open the first oil passage (641) or automatically adjust the opening degree of the first oil passage (641).

3. The crankshaft of the compressor according to claim 2, wherein the sliding part (63) can be driven by the centrifugal force to move along the groove (65) to open the first oil passage (641) or automatically adjust the opening degree of the first oil passage (641) according to the centrifugal force.

4. The crankshaft of the compressor according to claim 3, wherein one end of the elastic part (62) is connected with the radial outer end of the sliding part (63), the other end is connected with the groove bottom of the groove (65), the sliding part (63) can be driven by the elastic force of the elastic part (62) to move at least part of the structure of the sliding part (63) into the first oil passage (641) to close the first oil passage (641) or automatically adjust the opening degree of the first oil passage (641) according to the centrifugal force.

5. The crankshaft of the compressor according to claim 4, wherein When the rotating speed of the crankshaft increases, the centrifugal force on the sliding part (63) increases, the sliding part (63) moves into the groove (65) to increase the volume, and the elastic part (62) is compressed, at this time the opening of the first oil passage (641) opened by the sliding part (63) increases; when the rotating speed of the crankshaft decreases, the centrifugal force on the sliding part (63) decreases, the elastic force of the elastic part (62) acts on the sliding part (63) and the volume of the sliding part (63) moving into the groove (65) decreases, at this time the opening of the first oil passage (641) opened by the sliding part (63) decreases.

6. The crankshaft of the compressor according to claim 3, characterized in that: The first oil passage (641) extends along the axial direction of the crankshaft (6), the second oil passage (642) extends along the radial direction of the crankshaft (6), and the groove (65) also extends along the radial direction of the crankshaft (6).

7. The crankshaft of the compressor according to any one of claims 1-6, characterized in that: A plurality of crankshaft oil passages (64) are arranged in the circumferential direction of the shaft shoulder (6b), and a plurality of sliding parts (63) are also arranged, and the sliding parts (63) are arranged one by one corresponding to the crankshaft oil passages (64), and each of the crankshaft oil passages (64) is provided with the sliding part (63).

8. The crankshaft of the compressor according to any one of claims 1-6, characterized in that: Further comprising an eccentric part (6c) which is axially connected with the shaft shoulder (6b), and a crankshaft center oil passage (61) is arranged in the inside of the crankshaft and extends in the axial direction, and the crankshaft center oil passage (61) penetrates to the axial end surface of the eccentric part (6c) and can deliver oil into the oil storage pool (5).

9. A compressor characterized by: The compressor comprising the crankshaft according to any one of claims 1-8 further comprises a support (4) and a movable scroll (2), the support (4) is sleeved on the outer periphery of the crankshaft (6) and can be used to support the movable scroll (2), the support (4), the movable scroll (2) and the shaft shoulder (6b) form the oil storage pool (5), the inside of the support (4) is provided with a third oil passage (43), and the crankshaft oil passage (64) on the shaft shoulder (6b) can be rotated to be opposite to the third oil passage (43) of the support (4), so that the crankshaft oil passage (64) communicates with the third oil passage (43) to discharge the oil in the oil storage pool (5) through the crankshaft oil passage (64) and then through the third oil passage (43).

10. The compressor according to claim 9, characterized in that: Further comprising a static scroll plate (1) which is connected with the bracket (4), and an inner part of the static scroll plate (1) is provided with a static scroll plate oil path (11), and the bracket (4) is further provided with an annular oil path (44), the annular oil path (44) is a semi-annular oil groove or an arc-shaped oil groove which is opened in the inner part of the bracket (4), and the bracket (4) is further provided with a fourth oil path (45), and the third oil path (43), the annular oil path (44), the fourth oil path (45) and the static scroll plate oil path (11) are sequentially communicated, and the static scroll plate oil path (11) can guide oil to a friction part between the static scroll plate (1) and the dynamic scroll plate (2).

11. The compressor of claim 10, wherein: The third oil path (43) comprises a third radial oil path (431) and a third axial oil path (432), the third radial oil path (431) extends along a radial direction, the third axial oil path (432) extends along an axial direction, a radial inner end of the third radial oil path (431) can be communicated with the crankshaft oil path (64) during rotation of the shaft shoulder (6b), a radial outer end of the third radial oil path (431) is communicated with an axial one end of the third axial oil path (432), and an axial other end of the third axial oil path (432) is communicated with the annular oil path (44).

12. The compressor of claim 10, wherein: The bracket (4) comprises a first bracket (41) and a second bracket (42), the first bracket (41) and the second bracket (42) are spliced in an axial direction, the second bracket (42) is connected with the shaft shoulder (6b) of the crankshaft, the first bracket (41) is connected with the static scroll plate (1), the third oil path (43) is arranged on the second bracket (42), the annular oil path (44) is arranged on a connecting surface of the first bracket (41) and the second bracket (42), and the fourth oil path (45) is arranged on the first bracket (41).

13. The compressor of claim 12, wherein: The fourth oil path (45) extends along an axial direction, and the fourth oil path (45) is arranged at an axial opposite position of the first bracket (41) and the static scroll plate (1), and the static scroll plate oil path (11) is also arranged at an axial opposite position of the static scroll plate (1) and the first bracket (41).

14. The compressor of claim 9, wherein: The shaft shoulder (6b) of the crankshaft (6) is connected with the bracket (4) in a radial direction; A crankshaft oil supply ring groove (9) is arranged on an end surface of the shaft shoulder (6b) which is connected with the bracket (4); and / or, a bracket oil supply ring groove (10) is arranged on an end surface of the bracket (4) which is connected with the shaft shoulder (6b).

15. An air conditioner characterized by comprising: The compressor of any one of claims 9-14.

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