A dual-circuit oil circulation supply structure for a horizontal scroll compressor

Abstract

The invention discloses a dual-circuit oil circulation supply structure of a horizontal scroll compressor, which includes: a differential pressure oil supply assembly for lubricating a movable scroll bearing and a main bearing and an oil pump oil supply assembly for lubricating a bottom bearing; the differential pressure oil supply assembly includes: an oil-gas separation device and an oil return pipe, and the oil pump oil supply assembly includes: an oil pump and an oil suction pipe. The invention has the following beneficial effects: first, the differential pressure oil supply oil circuit is short, which reduces the pressure drop and leakage in the oil circuit. Second, the bottom bearing is supplied with oil by an oil pump alone instead of differential pressure oil supply, which reduces the amount of differential pressure oil supply to a certain extent, which is beneficial to improving the volumetric efficiency and the refrigeration capacity of the compressor. Third, the frequency conversion applicability is good. In the frequency conversion application, the movable scroll bearing and the main bearing are supplied with differential pressure oil, and the oil supply amount is less affected by the speed change and is not easy to wear; although the bottom bearing is supplied with oil by an oil pump, the oil supply amount is small at low speed, but the load on the bottom bearing is small, the demand for lubricating oil is small, and therefore it is not easy to wear.

Description

Technical Field

[0001] The invention belongs to the technical field of scroll compressors, and in particular relates to a double-path oil circulation oil supply structure of a horizontal scroll compressor. Background Art

[0002] The oil return methods of low-pressure cavity horizontal scroll compressors are generally divided into two types: oil pump oil supply and pressure differential oil supply. The advantage of oil pump oil supply is that it will not affect the volumetric efficiency of the compressor, but the disadvantage is that the oil supply is greatly affected by the speed, and the bearings are prone to lack of oil and wear at low speeds; the advantage of pressure differential oil supply is that the oil supply is not affected by the speed, but the disadvantage is that it will cause a certain amount of internal leakage in the compressor, reducing the volumetric efficiency and cooling capacity of the compressor.

[0003] The bottom bearing, movable scroll bearing and main bearing of the horizontal compressor are generally distributed at both ends of the shaft, with a large span. The existing technology adopts a single oil supply method to supply oil to these bearings as a whole, and the required oil supply amount is large. When the oil pump is used for oil supply, it is easy to cause the oil level in the oil pool to drop too quickly and the oil cannot be sucked; when the pressure difference is used for oil supply, it is easy to cause the volumetric efficiency to be too low and the cooling capacity of the compressor to be too small. Summary of the invention

[0004] In order to solve the above technical problems, the present invention proposes a dual-circuit oil circulation supply structure for a horizontal scroll compressor.

[0005] In order to achieve the above object, the technical solution of the present invention is as follows:

[0006] The present invention discloses a dual-circuit oil circulation supply structure of a horizontal scroll compressor, comprising: a housing and a compression mechanism, a driving mechanism, a main bearing seat, a movable scroll bearing, a main bearing and a bottom bearing arranged in the housing, wherein the main bearing is arranged in a bearing cavity of the main bearing seat;

[0007] The compression mechanism includes a fixed scroll and a movable scroll meshing with each other, and the driving mechanism includes a stator, a rotor and a crankshaft, the shaft head of the crankshaft is drivingly connected to the movable scroll bearing, a part of the shaft body of the crankshaft is drivingly connected to the main bearing, and the shaft tail of the crankshaft is drivingly connected to the bottom bearing;

[0008] The internal chamber defined by the shell is divided into a high-pressure chamber and a low-pressure chamber by a partition;

[0009] Further, the present invention also includes: a pressure differential oil supply assembly and an oil pump oil supply assembly;

[0010] The differential pressure oil supply assembly includes:

[0011] An oil-gas separation device is arranged in the high-pressure chamber and on the exhaust port side of the compression mechanism, and is used to separate the lubricating oil in the exhaust gas of the compression mechanism and accumulate it in the oil pool of the high-pressure chamber;

[0012] An oil return pipe, one end of which is connected to the high-pressure chamber oil pool, and the other end of which is connected to the internal oil circuit of the main bearing seat, the internal oil circuit of the main bearing seat is connected to the first internal oil circuit of the crankshaft through the oil hole of the main bearing, and the first internal oil circuit of the crankshaft is used to guide the lubricating oil from the main bearing to the movable scroll bearing;

[0013] The oil pump oil supply assembly includes:

[0014] The oil pump is connected to the tail of the crankshaft by driving, and the tail of the crankshaft drives the oil pump to rotate;

[0015] An oil suction pipe, one end of the oil suction pipe is connected to the low-pressure chamber oil pool, and the other end is connected to the oil inlet of the oil pump. The oil outlet of the oil pump is connected to the second internal oil circuit of the crankshaft. The second internal oil circuit of the crankshaft is used to lead the lubricating oil from the oil outlet of the oil pump to the bottom bearing.

[0016] The double-circuit oil circulation oil supply structure of a horizontal scroll compressor of the present invention is a mixed oil supply structure combining pressure difference oil return and oil pump oil supply.

[0017] The present invention has two oil circulations in total. The movable scroll bearing and the main bearing use pressure difference oil supply to realize oil circulation, and the bottom bearing uses an oil pump to supply oil to realize oil circulation.

[0018] The refrigerant sucked in by the air intake carries part of the lubricating oil in the low-pressure chamber oil pool into the compression mechanism, lubricates the fixed scroll and the orbiting scroll, and is discharged from the exhaust port of the compression mechanism to the high-pressure chamber. The oil-gas separation device in the high-pressure chamber separates the lubricating oil in the exhaust gas and gathers it in the high-pressure chamber oil pool. The lubricating oil flows into the internal oil path of the main bearing seat and the first internal oil path of the crankshaft through the oil return pipe to lubricate the main bearing and the orbiting scroll bearing.

[0019] When the crankshaft rotates, the tail of the crankshaft drives the oil pump to rotate, generating a pressure difference, sucking the lubricating oil from the low-pressure chamber oil pool into the oil pump through the oil suction pipe, and then discharged from the oil pump into the second internal oil circuit of the crankshaft to lubricate the bottom bearing.

[0020] The double-circuit oil circulation supply structure of a horizontal scroll compressor of the present invention has the following beneficial effects:

[0021] First, the differential pressure oil supply oil circuit of the present invention is short, which reduces the pressure drop and leakage in the oil circuit.

[0022] Secondly, the oil pump is used to supply oil to the bottom bearing of the present invention independently instead of supplying oil by pressure difference, which reduces the oil supply amount by pressure difference to a certain extent, and is beneficial to improving the volumetric efficiency and the cooling capacity of the compressor.

[0023] Third, the frequency conversion has good applicability. In the frequency conversion application, the movable scroll bearing and the main bearing are supplied with oil by pressure difference, and the oil supply is less affected by the speed change and is not easy to wear; although the bottom bearing is supplied with oil by an oil pump, the oil supply is small at low speed, but the load on the bottom bearing is small, the demand for lubricating oil is small, so it is not easy to wear.

[0024] Based on the above technical solution, the following improvements can be made:

[0025] As a preferred solution, the crankshaft is provided with an annular oil groove, a first side hole, and an eccentric oil hole for forming a first internal oil circuit;

[0026] The annular oil groove is arranged at the position of the crankshaft for installing the main bearing, and the annular oil groove is connected with the oil hole of the main bearing;

[0027] The first side hole is arranged in the annular oil groove, and the first side hole extends in the radial direction of the crankshaft;

[0028] The eccentric oil hole is communicated with the first side hole, and the eccentric oil hole extends along the axial direction of the crankshaft and passes through the shaft head thereof.

[0029] With the above preferred solution, the lubricating oil flows out of the oil hole of the main bearing and enters the annular oil groove to lubricate the main bearing well. The lubricating oil flows into the eccentric oil hole inside the crankshaft through the first side hole, flows out from the shaft head of the crankshaft, and lubricates the movable scroll bearing.

[0030] As a preferred solution, the crankshaft is provided with a central oil hole and a second side hole for forming a second internal oil circuit;

[0031] The central oil hole is connected to the oil outlet of the oil pump, and the central oil hole extends along the axial direction of the crankshaft and passes through the shaft tail;

[0032] The second side hole is communicated with the central oil hole. The second side hole is arranged at a position of the crankshaft for installing a bottom bearing. The second side hole extends in the radial direction of the crankshaft.

[0033] By adopting the above preferred solution, the lubricating oil is discharged from the oil outlet of the oil pump, enters the central oil hole of the crankshaft, and then lubricates the bottom bearing through the second side hole connected to the central oil hole.

[0034] As a preferred solution, a first oil storage tank and / or a second oil storage tank is also provided on the crankshaft, the first oil storage tank is connected to the annular oil tank, the second oil storage tank is connected to the second side hole, and the second oil storage tank is arranged at the position of the crankshaft for installing the bottom bearing.

[0035] With the above preferred solution, the first oil storage tank is used to store lubricating oil, which further improves the lubricating effect on the main bearing. The second oil storage tank is used to store lubricating oil, which further improves the lubricating effect on the bottom bearing.

[0036] As a preferred solution, the second oil storage tank extends to the back cutter groove of the crankshaft.

[0037] By adopting the above preferred solution, excess lubricating oil can be discharged from the backing groove of the crankshaft.

[0038] As a preferred solution, one or more radial oil grooves are provided on the thrust surface of the bottom bearing, and the radial oil grooves are through grooves connecting the inner hole of the bottom bearing and the outer edge thereof.

[0039] By adopting the above preferred solution, the radial oil groove and the bottom bearing wear plate on the bottom bearing form an oil passage to discharge the lubricating oil in the bottom bearing, and the lubricating oil returns to the low-pressure chamber oil pool to realize oil circulation. The oil pump at the bottom bearing sucks up the lubricating oil and discharges it quickly, which will not affect the oil level of the low-pressure chamber oil pool.

[0040] As a preferred solution, an oil drain hole is provided on the main bearing seat, and the oil drain hole is arranged at the position of the bearing cavity. The oil drain hole is used to discharge the lubricating oil accumulated in the bearing cavity into the low-pressure cavity oil pool.

[0041] By adopting the above preferred solution, excess lubricating oil is collected in the cavity of the main bearing seat and returns to the low-pressure chamber oil pool through the oil drain hole, thereby realizing oil circulation.

[0042] As a preferred solution, a heat dissipation rib is provided on the main bearing seat, and the heat dissipation rib is arranged at a position close to the main bearing.

[0043] By adopting the above preferred solution, a heat dissipation rib is provided at the main bearing on the main bearing seat, which can increase the heat exchange area of ​​the main bearing seat and better cool the lubricating oil at the main bearing.

[0044] As a preferred solution, an oil baffle is provided on the main bearing seat, and the oil baffle is used to isolate the movable scroll from the lubricating oil in the low-pressure chamber oil pool.

[0045] By adopting the above preferred solution, the movable scroll can rotate better.

[0046] As a preferred solution, the air intake port of the horizontal scroll compressor is arranged close to the main bearing.

[0047] By adopting the above preferred solution, the temperature of the lubricating oil returning from the high-pressure chamber to the main bearing is relatively high, and the suction port of the compressor is facing the main bearing. The refrigerant sucked into the suction port has a good cooling effect on the lubricating oil at the main bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0049] Figure 1 A cross-sectional view of a dual-circuit oil circulation supply structure provided in an embodiment of the present invention.

[0050] Figure 2 A cross-sectional view of a dual-circuit oil circulation supply structure (with a high-pressure chamber and a low-pressure chamber marked) provided in an embodiment of the present invention.

[0051] Figure 3 This is one of the structural schematic diagrams of the main bearing seat provided in an embodiment of the present invention.

[0052] Figure 4 The second structural schematic diagram of the main bearing seat provided in the embodiment of the present invention.

[0053] Figure 5 A schematic structural diagram of the shaft head portion of a crankshaft provided in an embodiment of the present invention.

[0054] Figure 6 A schematic structural diagram of the tail portion of a crankshaft provided in an embodiment of the present invention.

[0055] Figure 7 An exploded view of the oil pump and bottom bearing portion provided in an embodiment of the present invention.

[0056] Figure 8 A cross-sectional view of a tail region of a crankshaft provided in an embodiment of the present invention.

[0057] Among them: 1-housing, 2-compression mechanism, 21-static scroll, 22-orbiting scroll, 3-driving mechanism, 31-stator, 32-rotor, 33-crankshaft, 331-shaft head, 332-shaft tail, 333-annular oil groove, 334-first side hole, 335-eccentric oil hole, 336-center oil hole, 337-second side hole, 338-first oil storage tank, 339-second oil storage tank, 3310-eccentric boss, 4-main bearing seat, 41-oil drain hole, 42-bearing cavity, 43-heat dissipation rib plate, 44 - oil baffle, 45- base, 46- thrust plate, 47- internal oil circuit, 5- movable scroll bearing, 6- main bearing, 61- oil hole, 7- bottom bearing, 71- radial oil groove, 72- bottom bearing wear plate, 73- fastener, 8- oil-gas separation device, 9- oil return pipe, 10- oil pump, 101- oil pump body, 102- oil pump wear plate, 103- oil pump end cover, 104- connector, 11- oil suction pipe, 12- throttling device, 13- partition, 14- unloading bushing, 15- filter screen, 16- bearing plate;

[0058] a-high pressure chamber, b-low pressure chamber. DETAILED DESCRIPTION

[0059] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] Using ordinal numbers “first,” “second,” “third,” etc. to describe common objects merely indicates that different instances of similar objects are involved and is not intended to imply that the objects so described must have a given order in time, space, order, or in any other manner.

[0062] In addition, the expression of “comprising” an element is an “open” expression, which merely means that corresponding components or steps exist, and should not be interpreted as excluding additional components or steps.

[0063] In order to achieve the purpose of the present invention, in some embodiments of a dual-circuit oil circulation oil supply structure of a horizontal scroll compressor, as Figure 1 and 2 As shown, the dual-circuit oil circulation supply structure includes: a housing 1 and a compression mechanism 2, a driving mechanism 3, a main bearing seat 4, a movable scroll bearing 5, a main bearing 6 and a bottom bearing 7 arranged in the housing 1, and the main bearing 6 is arranged in the bearing cavity 42 of the main bearing seat 4;

[0064] The compression mechanism 2 includes a fixed scroll 21 and a movable scroll 22 meshing with each other, and the driving mechanism 3 includes a stator 31, a rotor 32 and a crankshaft 33, wherein a shaft head 331 of the crankshaft 33 is drivingly connected to the movable scroll bearing 5, a part of the shaft body of the crankshaft 33 is drivingly connected to the main bearing 6, and a shaft tail 332 of the crankshaft 33 is drivingly connected to the bottom bearing 7;

[0065] The inner chamber defined by the housing 1 is divided into a high-pressure chamber a and a low-pressure chamber b by a partition 13 .

[0066] Further, the present invention also includes: a pressure differential oil supply assembly and an oil pump oil supply assembly;

[0067] The differential pressure oil supply assembly includes:

[0068] The oil-gas separation device 8 is arranged in the high-pressure chamber and at the exhaust port side of the compression mechanism 2, and is used to separate the lubricating oil in the exhaust gas of the compression mechanism 2 and accumulate it in the high-pressure chamber oil pool;

[0069] An oil return pipe 9, one end of which is in communication with the high-pressure chamber oil pool, and the other end of which is in communication with the internal oil path 47 of the main bearing seat 4. The internal oil path 47 of the main bearing seat 4 is in communication with the first internal oil path of the crankshaft 33 through the oil hole 61 of the main bearing 6. The first internal oil path of the crankshaft 33 is used to guide the lubricating oil from the main bearing 6 to the movable scroll bearing 5.

[0070] The oil pump oil supply assembly includes:

[0071] The oil pump 10 is in driving connection with the shaft tail 332 of the crankshaft 33, and the shaft tail 332 of the crankshaft 33 drives the oil pump 10 to rotate;

[0072] The oil suction pipe 11 has one end connected to the low-pressure chamber oil pool, and the other end connected to the oil inlet of the oil pump 10. The oil outlet of the oil pump 10 is connected to the second internal oil circuit of the crankshaft 33. The second internal oil circuit of the crankshaft 33 is used to guide the lubricating oil from the oil outlet of the oil pump 10 to the bottom bearing 7.

[0073] Furthermore, an eccentric boss 3310 is provided at the shaft tail 332 of the crankshaft 33. When the crankshaft 33 rotates, the eccentric boss 3310 at the shaft tail 332 of the crankshaft 33 drives the oil pump 10 to rotate. The above oil pump can be, but is not limited to, a swing type positive displacement pump.

[0074] Furthermore, the oil return pipe 9 may be, but is not limited to, a copper pipe.

[0075] The double-circuit oil circulation oil supply structure of a horizontal scroll compressor of the present invention is a mixed oil supply structure combining pressure difference oil return and oil pump oil supply.

[0076] There are two oil circulations in the present invention. The movable scroll bearing 5 and the main bearing 6 use pressure difference oil supply to realize oil circulation, and the bottom bearing 7 uses an oil pump to supply oil to realize oil circulation.

[0077] The refrigerant sucked into the air intake port carries part of the lubricating oil in the low-pressure chamber oil pool into the compression mechanism 2, lubricates the fixed scroll 21 and the movable scroll 22, and is discharged from the exhaust port of the compression mechanism 2 to the high-pressure chamber. The oil-gas separation device 8 in the high-pressure chamber separates the lubricating oil in the exhaust gas and gathers it in the high-pressure chamber oil pool. The lubricating oil flows into the internal oil path of the main bearing seat 4 and the first internal oil path of the crankshaft 33 through the oil return pipe 9 to lubricate the main bearing 6 and the movable scroll bearing 5.

[0078] When the crankshaft 33 rotates, the tail 332 of the crankshaft 33 drives the oil pump 10 to rotate, generating a pressure difference, and the lubricating oil in the low-pressure chamber oil pool is sucked into the oil pump 10 through the oil suction pipe 11, and then discharged from the oil pump 10 into the second internal oil circuit of the crankshaft 33 to lubricate the bottom bearing 7.

[0079] The double-circuit oil circulation supply structure of a horizontal scroll compressor of the present invention has the following beneficial effects:

[0080] First, the differential pressure oil supply oil circuit of the present invention is short, which reduces the pressure drop and leakage in the oil circuit.

[0081] Secondly, the bottom bearing 7 of the present invention is supplied with oil by an oil pump alone instead of by differential pressure, which reduces the amount of differential pressure oil supply to a certain extent, and is beneficial to improving the volumetric efficiency and the cooling capacity of the compressor.

[0082] Third, the frequency conversion has good applicability. In the frequency conversion application, the movable scroll bearing 5 and the main bearing 6 are supplied with oil by pressure difference, and the oil supply is less affected by the speed change and is not easy to wear; although the bottom bearing 7 is supplied with oil by the oil pump 10, the oil supply is small at low speed, but the bottom bearing 7 is under small load and requires less lubricating oil, so it is not easy to wear.

[0083] In order to further optimize the implementation effect of the present invention, in some other embodiments, the remaining characteristic technologies are the same, except that, Figure 5 and 6 As shown, the crankshaft 33 is provided with an annular oil groove 333, a first side hole 334, and an eccentric oil hole 335 for forming a first internal oil circuit;

[0084] The annular oil groove 333 is arranged at a position of the crankshaft 33 for mounting the main bearing 6, and the annular oil groove 333 is connected to the oil hole 61 of the main bearing 6;

[0085] The first side hole 334 is disposed in the annular oil groove 333 , and the first side hole 334 extends along the radial direction of the crankshaft 33 ;

[0086] The eccentric oil hole 335 is communicated with the first side hole 334 , and the eccentric oil hole 335 extends along the axial direction of the crankshaft 33 and passes through the shaft head 331 thereof.

[0087] The above embodiment has the following beneficial effects: the lubricating oil flows out of the oil hole 61 of the main bearing 6 and enters the annular oil groove 333 to lubricate the main bearing 6. The lubricating oil flows into the eccentric oil hole 335 inside the crankshaft 33 through the first side hole 334, flows out from the shaft head 331 of the crankshaft 33, and lubricates the movable scroll bearing 5.

[0088] Further, on the basis of the above embodiment, the crankshaft 33 is provided with a central oil hole 336 and a second side hole 337 for forming a second internal oil passage;

[0089] The central oil hole 336 is communicated with the oil outlet of the oil pump 10 , and the central oil hole 336 extends along the axial direction of the crankshaft 33 and passes through the shaft tail 332 thereof;

[0090] The second side hole 337 is communicated with the central oil hole 336 . The second side hole 337 is disposed at a position of the crankshaft 33 for mounting the bottom bearing 7 . The second side hole 337 extends in the radial direction of the crankshaft 33 .

[0091] The above embodiment has the following beneficial effects: the lubricating oil is discharged from the oil outlet of the oil pump 10 and enters the central oil hole 336 of the crankshaft 33 , and then lubricates the bottom bearing 7 through the second side hole 337 connected to the central oil hole 336 .

[0092] Furthermore, based on the above embodiment, a first oil storage tank 338 and a second oil storage tank 339 are also provided on the crankshaft 33. The first oil storage tank 338 is connected to the annular oil groove 333, and the second oil storage tank 339 is connected to the second side hole 337. The second oil storage tank 339 is arranged at a position on the crankshaft 33 for installing the bottom bearing 7.

[0093] The above embodiment has the following beneficial effects: the first oil storage tank 338 is used to store lubricating oil, which further improves the lubricating effect on the main bearing 6 ; the second oil storage tank 339 is used to store lubricating oil, which further improves the lubricating effect on the bottom bearing 7 .

[0094] Furthermore, the first oil storage tank 338 is disposed near the first side hole 334 .

[0095] The number of the first oil storage tank 338 and the second oil storage tank 339 is not limited and can be one or more.

[0096] The structures of the first oil storage tank 338 and the second oil storage tank 339 are not limited and can be square planar tanks.

[0097] Further, based on the above embodiment, the second oil storage groove 339 extends to the back cutter groove of the crankshaft 33 .

[0098] The above embodiment has the following beneficial effects: excess lubricating oil can be discharged from the backing groove of the crankshaft 33 .

[0099] In order to further optimize the implementation effect of the present invention, in some other embodiments, the remaining characteristic technologies are the same, except that, Figure 7 and 8 As shown, one or more radial oil grooves 71 are provided on the thrust surface of the bottom bearing 7. The radial oil grooves 71 are through grooves connecting the inner hole of the bottom bearing 7 and the outer edge thereof.

[0100] The above embodiment has the following beneficial effects: the radial oil groove 71 and the bottom bearing wear plate 72 on the bottom bearing 7 form an oil passage to discharge the lubricating oil in the bottom bearing 7, and the lubricating oil returns to the low-pressure chamber oil pool to achieve oil circulation. The oil pump 10 at the bottom bearing 7 quickly discharges the lubricating oil after sucking it up, and will not affect the oil level of the low-pressure chamber oil pool.

[0101] The bottom bearing 7 and the bottom bearing wear plate 72 are fixedly connected by fasteners 73 (such as bolts).

[0102] Furthermore, the bottom bearing 7 is fixedly mounted by a bearing plate 16 .

[0103] The oil pump 10 includes an oil pump body 101 , an oil pump wear-resistant sheet 102 , an oil pump end cover 103 and a connecting piece 104 .

[0104] In order to further optimize the implementation effect of the present invention, in some other embodiments, the remaining characteristic technologies are the same, except that, Figure 3 As shown, the main bearing seat 4 is provided with an oil drain hole 41, which is arranged at the position of the bearing cavity 42. The oil drain hole 41 is used to discharge the lubricating oil accumulated in the bearing cavity 42 into the low-pressure cavity oil pool.

[0105] The above embodiment has the following beneficial effects: the excess lubricating oil is collected in the cavity of the main bearing seat 4 and returns to the low-pressure chamber oil pool through the oil drain hole 41, thereby achieving oil circulation.

[0106] In order to further optimize the implementation effect of the present invention, in some other embodiments, the remaining characteristic technologies are the same, except that, Figure 4 As shown, a heat dissipation rib plate 43 is provided on the main bearing seat 4 , and the heat dissipation rib plate 43 is arranged at a position close to the main bearing 6 .

[0107] The above embodiment has the following beneficial effects: a heat dissipation rib 43 is provided at the main bearing 6 on the main bearing seat 4 to increase the heat exchange area of ​​the main bearing seat 4 and better cool the lubricating oil at the main bearing 6 .

[0108] In order to further optimize the implementation effect of the present invention, in some other embodiments, the remaining characteristic technologies are the same, except that, Figure 4 As shown, an oil baffle plate 44 is provided on the main bearing seat 4, and the oil baffle plate 44 is used to isolate the movable scroll 22 from the lubricating oil in the low-pressure chamber oil pool.

[0109] The above embodiment has the following beneficial effects: the movable scroll 22 can rotate better.

[0110] Furthermore, the main bearing seat 4 includes a base 45 and a thrust plate 46 fixedly connected to the base 45 .

[0111] In order to further optimize the implementation effect of the present invention, in some other embodiments, the remaining characteristic technologies are the same, except that the air intake port of the horizontal scroll compressor is arranged at the main bearing 6.

[0112] The above embodiment has the following beneficial effects: the temperature of the lubricating oil returning from the high-pressure chamber to the main bearing 6 is relatively high, and the compressor suction port is facing the main bearing 6, so that the refrigerant sucked into the suction port has a good cooling effect on the lubricating oil at the main bearing 6.

[0113] In order to further optimize the implementation effect of the present invention, in some other embodiments, the other characteristic technologies are the same, the difference is that the oil suction port of the oil suction pipe 11 is located in the central position of the low-pressure chamber to prevent the compressor from failing to suck in lubricating oil when it is tilted.

[0114] In order to further optimize the implementation effect of the present invention, in some other embodiments, the remaining characteristic technologies are the same, except that a filter 15 is provided at the oil suction port of the oil suction pipe 11 to prevent impurities from clogging the oil circuit.

[0115] Furthermore, the oil suction pipe 11 is an L-shaped pipe.

[0116] In order to further optimize the implementation effect of the present invention, in some other embodiments, the other characteristic technologies are the same, and the difference is that an eccentric balancing block is provided on the unloading bushing 14 to achieve radial flexibility and play a role of dynamic balance.

[0117] In order to further optimize the implementation effect of the present invention, in some other embodiments, the other characteristic technologies are the same, the difference is that a throttling device 12 is provided at the inlet of the return oil pipe 9, and the throttling device 12 is used to throttle and reduce the pressure of the lubricating oil in the high-pressure chamber oil pool and then flow into the return oil pipe 9.

[0118] Furthermore, the throttling device 12 is installed on the partition 13 .

[0119] The above multiple implementations can be implemented in parallel.

[0120] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0121] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0122] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

[0123] The control method of the present invention is to control by manually starting and closing the switch. The wiring diagram of the power element and the provision of power supply are common knowledge in the field, and the present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and wiring layout in detail.

Claims

1. A dual-circuit oil circulation supply structure for a horizontal scroll compressor, comprising: A housing and a compression mechanism, a driving mechanism, a main bearing seat, a movable scroll bearing, a main bearing and a bottom bearing arranged in the housing, wherein the main bearing is arranged in a bearing cavity of the main bearing seat; The compression mechanism comprises a fixed scroll and a movable scroll meshing with each other, and the driving mechanism comprises: a stator, a rotor and a crankshaft, the shaft head of the crankshaft is drivingly connected to the movable scroll bearing, a part of the shaft body of the crankshaft is drivingly connected to the main bearing, and the shaft tail of the crankshaft is drivingly connected to the bottom bearing; The internal cavity defined by the shell is divided into a high-pressure cavity and a low-pressure cavity by a partition; It is characterized by further comprising: a pressure difference oil supply component and an oil pump oil supply component; The pressure differential oil supply assembly comprises: An oil-gas separation device, which is arranged in the high-pressure chamber and on the exhaust port side of the compression mechanism, and is used to separate the lubricating oil in the exhaust gas of the compression mechanism and accumulate it in the high-pressure chamber oil pool; An oil return pipe, one end of which is in communication with the high-pressure chamber oil pool, and the other end of which is in communication with the internal oil circuit of the main bearing seat, the internal oil circuit of the main bearing seat being in communication with the first internal oil circuit of the crankshaft through the oil hole of the main bearing, the first internal oil circuit of the crankshaft being used to guide the lubricating oil from the main bearing to the movable scroll bearing; The oil pump oil supply assembly comprises: An oil pump, the oil pump is drivingly connected to the tail of the crankshaft, and the tail of the crankshaft drives the oil pump to rotate; An oil suction pipe, one end of which is connected to the low-pressure chamber oil pool, and the other end of which is connected to the oil inlet of the oil pump. The oil outlet of the oil pump is connected to the second internal oil circuit of the crankshaft. The second internal oil circuit of the crankshaft is used to guide the lubricating oil from the oil outlet of the oil pump to the bottom bearing.

2. The dual-circuit oil circulation supply structure according to claim 1 is characterized in that: The crankshaft is provided with an annular oil groove, a first side hole, and an eccentric oil hole for forming a first internal oil circuit; The annular oil groove is arranged at a position of the crankshaft for mounting a main bearing, and the annular oil groove is communicated with an oil hole of the main bearing; The first side hole is arranged in the annular oil groove, and the first side hole extends in the radial direction of the crankshaft; The eccentric oil hole is communicated with the first side hole, and the eccentric oil hole extends along the axial direction of the crankshaft and passes through the shaft head thereof.

3. The dual-circuit oil circulation supply structure according to claim 2 is characterized in that: The crankshaft is provided with a central oil hole and a second side hole for forming a second internal oil circuit; The central oil hole is communicated with the oil outlet of the oil pump, and the central oil hole extends along the axial direction of the crankshaft and passes through the shaft tail thereof; The second side hole is communicated with the central oil hole. The second side hole is arranged at a position of the crankshaft for installing a bottom bearing. The second side hole extends in a radial direction of the crankshaft.

4. The dual-circuit oil circulation supply structure according to claim 3 is characterized in that: The crankshaft is also provided with a first oil storage tank and / or a second oil storage tank. The first oil storage tank is connected to the annular oil tank, and the second oil storage tank is connected to the second side hole. The second oil storage tank is arranged at a position on the crankshaft for installing a bottom bearing.

5. The dual-circuit oil circulation supply structure according to claim 4 is characterized in that: The second oil storage tank extends to the undercut groove of the crankshaft.

6. The dual-circuit oil circulation supply structure according to any one of claims 1 to 5, characterized in that: One or more radial oil grooves are arranged on the thrust surface of the bottom bearing, and the radial oil grooves are through grooves connecting the inner hole of the bottom bearing and the outer edge thereof.

7. The dual-circuit oil circulation supply structure according to any one of claims 1 to 5, characterized in that: The main bearing seat is provided with an oil drain hole, which is arranged at the position of the bearing cavity. The oil drain hole is used to discharge the lubricating oil accumulated in the bearing cavity into the low-pressure cavity oil pool.

8. The dual-circuit oil circulation supply structure according to any one of claims 1 to 5, characterized in that: The main bearing seat is provided with a heat dissipation rib plate, and the heat dissipation rib plate is arranged at a position close to the main bearing.

9. The dual-circuit oil circulation supply structure according to any one of claims 1 to 5, characterized in that: An oil baffle is provided on the main bearing seat, and the oil baffle is used to isolate the movable scroll from the lubricating oil in the low-pressure chamber oil pool.

10. The dual-circuit oil circulation supply structure according to any one of claims 1 to 5, characterized in that: The air intake port of the horizontal scroll compressor is arranged at a position close to the main bearing.

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