Compressor with speed reducer

Abstract

The invention relates to the technical field of compressors, in particular to a compressor with a speed reducer. A crankshaft oil hole is formed in the crankshaft in a through manner; the speed reducer is provided with an input shaft connected with the power shaft, an output shaft connected with the crankshaft, a transmission assembly connected with the input shaft and the output shaft and a shell, an interval space is formed between the transmission assembly and the shell, and the input shaft and the output shaft are both in sealing fit with the shell, so that the interval space is closed to form an oil storage cavity; an axial oil duct penetrating in the axial direction and a connecting oil duct communicating the axial oil duct with the oil storage cavity are arranged in the transmission assembly, and the end, close to the crankshaft, of the axial oil duct communicates with the crankshaft oil hole. An oil pool is arranged at the bottom of a pump body side cavity for containing the pump body in the compressor shell, and the oil pool provides lubricating oil for the crankshaft oil hole. Lubricating oil in the compressor is used for lubricating a transmission assembly of the speed reducer, the cost of the speed reducer is reduced while the speed reducer is lubricated, and the rotating speed of the input end of the speed reducer is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a compressor with a reducer. Background Art

[0002] Conventional rolling rotor compressors rely on the crankshaft to connect the motor assembly and the pump assembly to complete synchronous operation. The electromagnetic force generated by the motor rotor and stator drives the crankshaft to rotate, and at the same time pumps the lubricating oil in the oil pool to each friction pair for lubrication and heat dissipation. Conventional rolling rotor compressors use the centrifugal force generated by the rotation of the crankshaft to suck the lubricating oil out of the oil pool. The oil circuit design is usually to suck the oil from the oil pool at the lower end of the crankshaft, and the lubricating oil is successively pumped to the lower bearing friction pair, the eccentric friction pair, and the upper bearing friction pair, and finally flows back to the oil pool through the crankshaft through-hole or transverse oil hole at the motor side and the gap between each friction pair, forming a lubricating oil circuit circulation.

[0003] In order to make full use of the characteristics of high efficiency of the motor at high speed and high efficiency of the pump at low speed, it is considered to add a reducer between the motor and the pump to realize asynchronous operation of the motor and the pump to improve the overall efficiency of the compressor. After adding the reducer, the motor assembly in the compressor is separated from the pump assembly, the motor assembly is connected to the input end of the reducer through the power shaft, and the pump assembly is connected to the output end of the reducer through the crankshaft. The lubricating oil circuit in the compressor will become a two-stage oil circuit due to the addition of the reducer, so the oil circuit system of the compressor with a reducer needs to be redesigned to meet the lubrication, cooling and heat dissipation of the friction pair of the pump body and the transmission parts (such as gears) in the reducer.

[0004] In addition, conventional reducers are usually sealed with lubricating grease to adapt to servo motors. Due to the characteristics of lubricating grease, the speed of the reducer input end is limited. Therefore, when conventional reducers are used in compressors, the rated input speed of the reducer input end is too low, which limits the upper limit of the compressor motor assembly speed that can be increased, making it difficult to achieve the compressor motor working in its optimal efficiency range, thus limiting the improvement of the compressor overall efficiency. Summary of the invention

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a compressor with a reducer, which can utilize the lubricating oil in the compressor to lubricate the transmission components of the reducer, thereby achieving lubrication of the reducer while reducing the cost of the reducer and increasing the speed of the reducer input end.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The present invention provides a compressor with a reducer, comprising: a power shaft, which is driven to rotate by a motor; a crankshaft, which is inserted into a pump body, and the interior of the crankshaft is axially penetrated to form a crankshaft oil hole; the reducer has an input shaft connected to the power shaft, an output shaft connected to the crankshaft, a transmission assembly connecting the input shaft and the output shaft, and a shell accommodating the input shaft, the output shaft and the transmission assembly, a spacing space is provided between the transmission assembly and the shell, the input shaft and the output shaft are both sealed with the shell, so that the spacing space is closed to form an oil storage cavity, an axial oil passage which is axially penetrated and a connecting oil passage which connects the axial oil passage and the oil storage cavity are provided inside the transmission assembly, and one end of the axial oil passage close to the crankshaft is connected to the crankshaft oil hole; a compressor housing, which accommodates the motor, the power shaft, the reducer, the crankshaft and the pump body, and an oil pool is provided at the bottom of a cavity on the pump body side of the compressor housing for accommodating the pump body, and the oil pool provides lubricating oil to the crankshaft oil hole.

[0008] Preferably, a cavity outside the reducer is formed between the outer shell and the compressor housing, and an oil outlet hole connecting the oil storage cavity and the cavity outside the reducer is provided on the outer shell, and the oil outlet hole is located at the upper part of the oil storage cavity.

[0009] Preferably, one end of the pump body close to the reducer is connected to the compressor housing through a cylinder head, the cylinder head separates the outer cavity of the reducer from the cavity on the pump body side, and the cylinder head is provided with a flow hole connecting the outer cavity of the reducer and the oil pool.

[0010] Preferably, a power shaft oil hole is formed axially through the interior of the power shaft, one end of the power shaft oil hole is connected to an end of the axial oil channel close to the power shaft, and the other end of the power shaft oil hole is connected to the motor side cavity accommodating the motor inside the compressor housing.

[0011] Preferably, one end of the reducer close to the motor is connected to the compressor housing through a connecting frame, the power shaft is rotatably inserted into the connecting frame and forms a connecting frame friction pair with the connecting frame, and an oil outlet channel connecting the power shaft oil hole and the connecting frame friction pair is also provided inside the power shaft.

[0012] Preferably, the connecting frame separates the motor side cavity from the outer cavity of the reducer, and the connecting frame is provided with an oil return hole connecting the motor side cavity and the outer cavity of the reducer.

[0013] Preferably, a rotary vane is provided in the axial oil passage.

[0014] Preferably, the rotary vane is located in the axial oil passage on a side of the connecting oil passage away from the crankshaft oil hole.

[0015] Preferably, the transmission assembly includes a sun gear, a planetary gear, a planetary carrier and a ring gear provided on the housing, one end of the sun gear is connected to the input shaft or is an integral part of an integral design, and the other end is meshed with one side of the planetary gear, the other side of the planetary gear is meshed with the ring gear, one end of the planetary carrier is connected to the planetary gear, and the other end is connected to the output shaft or is an integral part of an integral design, an axial oil passage runs through the sun gear and the planetary carrier, and a connecting oil passage is formed between the sun gear and the planetary carrier along the axial interval.

[0016] Preferably, the pump body is placed horizontally, the crankshaft is arranged non-vertically to the mounting surface on which the compressor housing is mounted, and the power shaft and the crankshaft are arranged coaxially.

[0017] Compared with the prior art, the present invention has significant improvements:

[0018] The compressor with a reducer of the present invention forms an oil storage cavity inside the reducer, and provides an axial oil passage connected to the crankshaft oil hole and a connecting oil passage connecting the axial oil passage and the oil storage cavity inside the transmission component of the reducer, so that the lubricating oil pumped into the crankshaft oil hole from the internal oil pool of the compressor can be sent to the axial oil passage in the transmission component, and the inside of the transmission component of the reducer can be lubricated, cooled and dissipated. At the same time, the lubricating oil entering the axial oil passage can enter the oil storage cavity through the connecting oil passage and gradually accumulate, so that the transmission component can be immersed in the lubricating oil in the oil storage cavity, thereby realizing oil immersion lubrication for the transmission component of the reducer. In this way, the lubricating oil in the oil pool inside the compressor can be used instead of grease to perform oil immersion lubrication, cooling and heat dissipation on the transmission components of the reducer. While achieving lubrication of the reducer, the original transmission component seals and grease of the reducer can be eliminated, thereby greatly reducing the cost of adding a reducer inside the compressor. In addition, the lubricating effect of lubricating oil is better than that of grease at high speeds. Using lubricating oil to perform oil immersion lubrication, cooling and heat dissipation on the transmission components of the reducer can effectively reduce the friction of the transmission components of the reducer, reduce the temperature inside the reducer, ensure the operating reliability of the reducer, and at the same time greatly increase the input speed of the reducer, so that the reducer can meet the requirements of high-speed operating conditions of the compressor, thereby making full use of the asynchronous operation of the motor and the pump body to achieve a significant improvement in the overall efficiency of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional schematic diagram of a compressor with a reducer according to an embodiment of the present invention.

[0020] Figure 2 It is a cross-sectional schematic diagram of a reducer in a compressor with a reducer according to an embodiment of the present invention.

[0021] The reference numerals are described as follows:

[0022] 1 Power shaft

[0023] 11 Power shaft oil hole

[0024] 12 Oil outlet channel

[0025] 2 Motor

[0026] 21 Rotor

[0027] 3 Crankshaft

[0028] 31 Crankshaft oil hole

[0029] 4 Pump body

[0030] 41 Cylinder head

[0031] 42 Through hole

[0032] 5 Reducer

[0033] 50 Bearings

[0034] 51 Input shaft

[0035] 511 Input shaft oil hole

[0036] 52 Output shaft

[0037] 53 Housing

[0038] 54 Oil storage chamber

[0039] 55 Axial oil channel

[0040] 56 Connecting oil channel

[0041] 57 Oil outlet

[0042] 58 Rotary Vane

[0043] 591 Sun gear

[0044] 592 Planetary gear

[0045] 593 Planetary bracket

[0046] 594 Ring gear

[0047] 595 Sun gear oil hole

[0048] 596 Planetary bracket oil hole

[0049] 6 Compressor housing

[0050] 61 Motor side cavity

[0051] 62 Pump body side cavity

[0052] 621 Oil Pool

[0053] 63 Reducer outer cavity

[0054] 7 Oil suction pipe

[0055] 8 Connection frame

[0056] 81 Oil return hole DETAILED DESCRIPTION

[0057] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, but not to limit the present invention.

[0058] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0059] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0061] like Figure 1 and Figure 2 As shown, an embodiment of a compressor with a reducer provided by the present invention is shown. The compressor with a reducer in this embodiment comprises a power shaft 1, a motor 2, a crankshaft 3, a pump body 4, a reducer 5 and a compressor housing 6. The compressor housing 6 is a housing structure with a hollow interior to form a closed cavity. The internal cavity of the compressor housing 6 accommodates the motor 2, the power shaft 1, the reducer 5, the crankshaft 3 and the pump body 4 of the compressor.

[0062] The power shaft 1 is driven to rotate by the motor 2, the motor 2 includes a stator and a rotor 21 disposed inside the stator, the power shaft 1 is passed through the rotor 21 and is connected and fixed to the rotor 21, so that the power shaft 1 is driven to rotate synchronously by the rotor 21 of the motor 2. A motor side cavity 61 for accommodating the motor 2 is formed in the internal cavity of the compressor housing 6, and the stator of the motor 2 is connected and fixed to the compressor housing 6 in the motor side cavity 61, so that the motor 2 is fixedly installed in the compressor housing 6.

[0063] The crankshaft 3 is passed through the pump body 4, which is the compression structure of the compressor. The eccentric portion of the crankshaft 3 drives the piston to perform eccentric operation inside the pump body 4, thereby compressing the working medium entering the pump body 4. A pump body side cavity 62 for accommodating the pump body 4 is formed in the internal cavity of the compressor housing 6. The pump body 4 is connected and fixed to the compressor housing 6 through the cylinder head 41 in the pump body side cavity 62, so that the pump body 4 is fixedly installed in the compressor housing 6.

[0064] The reducer 5 has an input shaft 51, an output shaft 52, a transmission assembly and a housing 53. The housing 53 is a shell structure that is hollow inside and penetrates in the axial direction. The input shaft 51, the output shaft 52 and the transmission assembly are accommodated in the internal space of the housing 53. The input shaft 51 is connected and fixed to the power shaft 1 at one axial end of the housing 53. The input shaft 51 receives the rotational torque of the power shaft 1 and rotates synchronously with the power shaft 1. The output shaft 52 is connected and fixed to the crankshaft 3 at the other axial end of the housing 53. The output shaft 52 outputs the rotational torque to the crankshaft 3 and drives the crankshaft 3 to rotate synchronously therewith. The input shaft 51 and the output shaft 52 are connected by a reduction transmission via a transmission assembly, so that the rotational speeds of the output shaft 52 and the input shaft 51 are in a set ratio, thereby realizing asynchronous operation of the crankshaft 3 on the pump body 4 side of the compressor and the power shaft 1 on the motor 2 side, and the operating speed of the pump body 4 is lower than the operating speed of the motor 2. This can fully utilize the characteristics that the motor 2 is more efficient at high speeds and the pump body 4 is more efficient at low speeds, so that the motor 2 and the pump body 4 can operate in their respective high efficiency ranges at the same time, thereby improving the overall efficiency of the compressor.

[0065] On the basis of adding a reducer 5 , the present invention designs a lubricating oil circuit for the compressor with a reducer so as to achieve lubrication of each friction pair of the pump body 4 while meeting the lubrication, cooling and heat dissipation requirements of the reducer 5 .

[0066] In this embodiment, the crankshaft 3 is axially penetrated to form a crankshaft oil hole 31, and an oil pool 621 is provided at the bottom of the pump body side cavity 62 of the compressor housing 6 that accommodates the pump body 4. The oil pool 621 stores lubricating oil, and the oil pool 621 provides lubricating oil to the crankshaft oil hole 31. Preferably, the end of the crankshaft oil hole 31 of the crankshaft 3 away from the reducer 5 is connected to one end of the oil suction pipe 7, and the other end of the oil suction pipe 7 is immersed in the oil pool 621, so that the crankshaft oil hole 31 is connected to the oil pool 621 through the oil suction pipe 7. When the pump body 4 is running, the centrifugal force generated in the crankshaft oil hole 31 by the rotation of the crankshaft 3 can cause the crankshaft oil hole 31 to suck the lubricating oil in the oil pool 621, and the continuous rotation of the crankshaft 3 causes the lubricating oil in the oil pool 621 to be continuously pumped into the crankshaft oil hole 31. Part of the lubricating oil pumped into the crankshaft oil hole 31 is delivered to the friction pairs of the pump body 4 through the pump body oil circuit in the pump body 4 to achieve lubrication of the friction pairs of the pump body 4. The pump body oil circuit can adopt the existing design.

[0067] There is a space between the transmission assembly of the reducer 5 and the housing 53. The input shaft 51 is sealed with one axial end of the housing 53, and the output shaft 52 is sealed with the other axial end of the housing 53, so that the space between the transmission assembly and the housing 53 is closed to form an oil storage cavity 54, and the oil storage cavity 54 is located inside the reducer 5. An axial oil passage 55 and a connecting oil passage 56 are provided inside the transmission assembly. The axial oil passage 55 passes through the transmission assembly in the axial direction. The connecting oil passage 56 is provided on the axial oil passage 55, and the connecting oil passage 56 connects the axial oil passage 55 and the oil storage cavity 54. One end of the axial oil passage 55 close to the crankshaft 3 is connected to the crankshaft oil hole 31. Part of the lubricating oil pumped into the crankshaft oil hole 31 enters the pump body oil circuit to the friction pairs of the pump body 4, and the rest is sent to the axial oil channel 55 in the transmission assembly, which can lubricate, cool and dissipate heat inside the transmission assembly of the reducer 5. At the same time, part of the lubricating oil entering the axial oil channel 55 enters the oil storage cavity 54 through the connecting oil channel 56. As the lubricating oil is continuously pumped into the crankshaft oil hole 31, the lubricating oil in the oil storage cavity 54 gradually accumulates and the lubricating oil level gradually rises, so that the transmission assembly can be immersed in the lubricating oil in the oil storage cavity 54, thereby realizing oil immersion lubrication for the transmission assembly of the reducer 5.

[0068] Therefore, the compressor with a reducer in this embodiment realizes the use of the lubricating oil in the internal oil pool 621 of the compressor instead of grease to perform oil immersion lubrication, cooling and heat dissipation on the transmission components of the reducer 5. While achieving the lubrication of the reducer 5, the original transmission component seals and grease of the reducer can be eliminated, thereby greatly reducing the cost of adding a reducer 5 inside the compressor. In addition, the lubricating effect of the lubricating oil is better than the lubricating effect of the grease at high speeds. The use of lubricating oil to perform oil immersion lubrication, cooling and heat dissipation on the transmission components of the reducer 5 can effectively reduce the friction of the transmission components of the reducer 5, reduce the temperature inside the reducer 5, ensure the operating reliability of the reducer 5, and at the same time greatly improve the input speed of the reducer 5, so that the reducer 5 can meet the requirements of the high-speed operating conditions of the compressor, thereby making full use of the asynchronous operation of the motor 2 and the pump body 4 to achieve a significant improvement in the overall efficiency of the compressor.

[0069] In this embodiment, preferably, the outer shell 53 of the reducer 5 and the compressor housing 6 are spaced to form an outer cavity 63 of the reducer, and an oil outlet hole 57 is provided on the outer shell 53. The oil outlet hole 57 connects the oil storage cavity 54 inside the reducer 5 with the outer cavity 63 of the reducer, and the oil outlet hole 57 is located at the upper part of the oil storage cavity 54. When the lubricating oil in the oil storage cavity 54 accumulates to the position where the lubricating oil liquid level reaches the oil outlet hole 57, the lubricating oil in the oil storage cavity 54 flows out from the oil outlet hole 57 and enters the outer cavity 63 of the reducer, thereby forming an open lubricating oil path in the reducer 5, and the heat generated by the friction of the transmission component of the reducer 5 during operation can be taken away by the flow of the lubricating oil in the oil storage cavity 54, which plays a role in cooling and dissipating the friction pair of the transmission component.

[0070] Furthermore, one end of the pump body 4 close to the reducer 5 is connected to the compressor housing 6 through the cylinder head 41. The cylinder head 41 separates the reducer outer cavity 63 from the pump body side cavity 62. The cylinder head 41 is provided with a flow hole 42 connecting the reducer outer cavity 63 and the oil pool 621. The flow hole 42 is arranged at the bottom of the cylinder head 41. As a result, the lubricating oil in the oil storage cavity 54 of the reducer 5 that flows out from the oil outlet hole 57 and enters the reducer outer cavity 63 accumulates at the bottom of the reducer outer cavity 63, and flows back to the oil pool 621 at the bottom of the pump body side cavity 62 through the flow hole 42 at the bottom of the cylinder head 41, thereby realizing the circulation of the lubricating oil in the compressor, that is, forming a circulating lubricating oil circuit inside the compressor. Through the circulation of the lubricating oil, the lubrication, cooling and heat dissipation effects of the reducer 5 can be further enhanced.

[0071] In this embodiment, preferably, a power shaft oil hole 11 is formed in the axial direction inside the power shaft 1, one end of the power shaft oil hole 11 is connected with the end of the axial oil passage 55 inside the transmission assembly of the reducer 5 close to the power shaft 1, and the other end of the power shaft oil hole 11 is connected with the motor side cavity 61 inside the compressor housing 6 accommodating the motor 2. As a result, the lubricating oil path inside the reducer 5 is open to the motor 2 side, and part of the lubricating oil entering the axial oil passage 55 enters the oil storage cavity 54 through the connecting oil passage 56, and the rest enters the power shaft oil hole 11, and flows into the motor side cavity 61 through the power shaft oil hole 11, so that the power shaft 1 can be cooled and dissipated.

[0072] Furthermore, one end of the reducer 5 close to the motor 2 is connected and fixed to the compressor housing 6 through the connecting frame 8, so that the reducer 5 is installed and fixed in the compressor housing 6. The power shaft 1 is rotatably installed in the connecting frame 8, so that the two ends of the power shaft 1 can be connected to the rotor 21 of the motor 2 and the input shaft 51 of the reducer 5 respectively. The power shaft 1 and the connecting frame 8 are rotated to form a connecting frame friction pair, which plays a role of rolling support for the power shaft 1. The inside of the power shaft 1 is also provided with an oil outlet channel 12 connecting the power shaft oil hole 11 and the connecting frame friction pair. Part of the lubricating oil entering the power shaft oil hole 11 can enter the connecting frame friction pair through the oil outlet channel 12 to achieve lubrication of the connecting frame friction pair, and the rest enters the motor side cavity 61.

[0073] Preferably, the connecting frame 8 separates the motor side cavity 61 from the outer cavity 63 of the reducer, and an oil return hole 81 is provided on the connecting frame 8 to connect the motor side cavity 61 and the outer cavity 63 of the reducer, and the oil return hole 81 is provided at the bottom of the connecting frame 8. As a result, the lubricating oil entering the motor side cavity 61 from the power shaft oil hole 11 flows to the bottom of the motor side cavity 61 under the action of gravity, and flows back to the bottom of the outer cavity 63 of the reducer through the oil return hole 81 at the bottom of the connecting frame 8, and then flows back to the oil pool 621 at the bottom of the pump body side cavity 62 through the flow hole 42 at the bottom of the cylinder head 41, thereby realizing the circulation of the lubricating oil sent from the pump body 4 side to the motor 2 side through the reducer 5 in the compressor, which can further enhance the lubrication, cooling and heat dissipation effects on various components in the compressor. The oil return hole 81 at the bottom of the connecting frame 8 can be an oil return groove opened on the outer peripheral surface of the bottom of the connecting frame 8, and the oil return groove axially penetrates the two axial side surfaces of the connecting frame 8, thereby connecting the motor side cavity 61 located on both sides of the connecting frame 8 with the outer cavity 63 of the reducer. The oil return hole 81 at the bottom of the connecting frame 8 can also be a through hole opened at the bottom edge of the connecting frame 8, and the through hole axially penetrates the two axial side surfaces of the connecting frame 8, thereby connecting the motor side cavity 61 located on both sides of the connecting frame 8 with the outer cavity 63 of the reducer.

[0074] In this embodiment, preferably, a rotary vane 58 is provided in the axial oil passage 55 inside the transmission assembly of the reducer 5. The rotary vane 58 rotates synchronously with the transmission assembly. The centrifugal force generated by the rotation of the rotary vane 58 can improve the oil pumping effect, increase the oil pumping power, and help pump the lubricating oil entering the axial oil passage 55 into the power shaft oil hole 11, so as to achieve cooling and heat dissipation of the power shaft 1 and lubrication of the connecting frame friction pair between the power shaft 1 and the connecting frame 8.

[0075] Furthermore, the vane 58 is located in the axial oil passage 55 on the side of the connecting oil passage 56 away from the crankshaft oil hole 31. Therefore, when the lubricating oil in the oil storage cavity 54 accumulates to the point where the lubricating oil level reaches or exceeds the end port where the connecting oil passage 56 and the axial oil passage 55 are connected, the centrifugal force generated by the rotation of the vane 58 in the axial oil passage 55 can help to suck the lubricating oil in the oil storage cavity 54 into the axial oil passage 55 through the connecting oil passage 56 and pump it into the power shaft oil hole 11, thereby realizing the secondary oil supply from the oil storage cavity 54 inside the reducer 5 to the power shaft oil hole 11. Since the power shaft 1 and the input shaft 51 of the reducer 5 continue to rotate at a high speed, the lubricating oil in the oil storage cavity 54 inside the reducer 5 can be easily pumped to the power shaft oil hole 11 and the connecting frame friction pair with the help of the rotary vane 58, thereby ensuring the oil supply in the power shaft oil hole 11 to ensure the cooling and heat dissipation effect of the power shaft 1 and the lubrication effect of the connecting frame friction pair between the power shaft 1 and the connecting frame 8.

[0076] In this embodiment, the structural form of the transmission assembly of the reducer 5 is not limited. Preferably, the transmission assembly adopts a planetary gear transmission mechanism to realize the coaxial reduction transmission connection between the input shaft 51 and the output shaft 52 of the reducer 5. Specifically, the transmission assembly includes a sun gear 591, a planetary gear 592, a planetary bracket 593, and a ring gear 594 fixed on the housing 53. One end of the sun gear 591 is connected to the input shaft 51 or is an integrally designed integral part, so that the sun gear 591 and the input shaft 51 keep synchronous rotation. The other end of the sun gear 591 meshes with one side of the planetary gear 592, and the other side of the planetary gear 592 meshes with the ring gear 594. The sun gear 591 can mesh with multiple planetary gears 592, and multiple planetary gears 592 are distributed between the sun gear 591 and the ring gear 594 along the circumference of the sun gear 591, so that a gap is formed between the sun gear 591 and the ring gear 594, that is, there is a gap between the transmission assembly and the housing 53, so as to form an oil storage cavity 54 inside the reducer 5. One end of the planetary bracket 593 is connected and fixed to the planetary gear 592, so that the planetary bracket 593 and the planetary gear 592 keep rotating synchronously. The other end of the planetary bracket 593 is connected to the output shaft 52 or is an integral part of an integral design, so that the planetary bracket 593 and the output shaft 52 keep rotating synchronously. When the input shaft 51 receives the rotational torque of the power shaft 1 and rotates, it drives the sun gear 591 to rotate around a fixed axis. Driven by the rotation of the sun gear 591, the planetary gear 592 rotates around its own axis. At the same time, the axis of the planetary gear 592 also rotates around the axis of the sun gear 591. The movement of the planetary gear 592 drives the planetary carrier 593 and the output shaft 52 to rotate around the fixed axis, and the output shaft 52 drives the crankshaft 3 to rotate, thereby realizing transmission with a predetermined reduction ratio.

[0077] When the transmission assembly of the reducer 5 adopts the above-mentioned planetary gear transmission mechanism, the sun gear 591 is axially penetrated to form a sun gear oil hole 595, and the planet carrier 593 is axially penetrated to form a planet carrier oil hole 596. The sun gear oil hole 595 and the planet carrier oil hole 596 are connected to form an axial oil passage 55, that is, the axial oil passage 55 penetrates the sun gear 591 and the planet carrier 593. A connecting oil passage 56 is formed between the sun gear 591 and the planet carrier 593 along the axial interval. The rotary vane 58 is arranged in the sun gear oil hole 595.

[0078] When the input shaft 51 and the sun gear 591 are connected as separate parts, the two ends of the input shaft 51 are respectively connected to the power shaft 1 and the end of the sun gear 591 away from the planetary bracket 593, and the input shaft 51 is axially penetrated to form an input shaft oil hole 511, and the input shaft oil hole 511 communicates with the sun gear oil hole 595 and the power shaft oil hole 11, thereby communicating the axial oil passage 55 with the power shaft oil hole 11. At this time, the vane 58 provided in the sun gear oil hole 595 can extend into the input shaft oil hole 511. When the input shaft 51 and the sun gear 591 are integrally designed as a whole, the sun gear oil hole 595 penetrates the sun gear 591 and the input shaft 51 and is directly connected to the power shaft oil hole 11.

[0079] When the output shaft 52 and the planetary carrier 593 are connected as separate parts, the two ends of the output shaft 52 are respectively connected to the end of the planetary carrier 593 away from the sun gear 591 and the crankshaft 3, and the output shaft 52 is axially penetrated to form an output shaft oil hole, which connects the planetary carrier oil hole 596 and the crankshaft oil hole 31, thereby connecting the axial oil passage 55 with the crankshaft oil hole 31. When the output shaft 52 and the planetary carrier 593 are an integral part of an integral design, the planetary carrier oil hole 596 penetrates the planetary carrier 593 and the output shaft 52 and is directly connected to the crankshaft oil hole 31.

[0080] The end of the input shaft 51 away from the sun gear 591 and the end of the housing 53 in the axial direction, and the end of the output shaft 52 away from the planetary support 593 and the other end of the housing 53 in the axial direction are supported and sealed by the bearing 50. The bearing 50 can be a rolling bearing, which is self-lubricated with grease and forms a seal. There can be a gap between the end of the input shaft 51 close to the sun gear 591 and the housing 53, there can be a gap between the end of the output shaft 52 close to the planetary support 593 and the housing 53, and there can be a gap between the planetary support 593 and the housing 53. These gaps and the gap between the sun gear 591 and the ring gear 594 together constitute the gap space between the transmission assembly and the housing 53, and form an oil storage cavity 54 inside the reducer 5.

[0081] After the reducer 5 is added inside the compressor, the oil pumping path inside the compressor is inevitably increased, and the pump body 4 will be kept in a low-speed operation state for a long time. The oil supply amount pumped upward by the centrifugal force of the crankshaft 3 on the side of the pump body 4 will also be reduced accordingly. In order to avoid the problem of insufficient oil supply at the end of the lubricating oil circuit far away from the pump body 4 due to the lengthening of the oil pumping path and the reduction of the oil pumping amount of the pump body 4, preferably, the compressor with a reducer in this embodiment adopts a horizontal arrangement, the pump body 4 is placed horizontally, the crankshaft 3 is not arranged vertically to the mounting surface of the compressor housing 6, and the power shaft 1 and the crankshaft 3 are arranged coaxially. Compared with the vertical compressor, the compressor with a reducer in this embodiment adopts a horizontal arrangement, so that the kinetic energy of the oil pumping does not need to be converted into more gravitational potential energy, thereby reducing the loss of the kinetic energy of the oil pumping, so that when the oil pumping path becomes longer and the oil pumping amount of the pump body 4 is reduced, the lubricating oil can be pumped to the end of the power shaft 1 far away from the reducer 5, so as to achieve lubrication of all friction pairs in the compressor.

[0082] Preferably, the compressor housing 6 is arranged at an inclined angle to the mounting surface on which the compressor housing 6 is mounted, and the heights of the motor side cavity 61, the reducer outer cavity 63 and the pump body side cavity 62 from the mounting surface are successively reduced, thereby making it easier for the lubricating oil in the motor side cavity 61 and the reducer outer cavity 63 to flow back to the oil pool 621 at the bottom of the pump body side cavity 62.

[0083] When the compressor with a reducer of this embodiment is arranged horizontally, the oil outlet hole 57 on the housing 53 of the reducer 5 is located above the axial oil passage 55 to ensure effective oil immersion of the transmission component and to ensure the oil supply in the axial oil passage 55. Preferably, the position of the oil outlet hole 57 deviates upward by at least 20° in the circumferential direction relative to the central axis of the axial oil passage 55, and the optimal deviation angle is 45°. Preferably, two oil outlet holes 57 can be provided, and the two oil outlet holes 57 are symmetrically arranged above the axial oil passage 55 relative to the vertical plane where the central axis of the axial oil passage 55 is located.

[0084] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A compressor with a reducer, characterized in that: include: A power shaft (1) is driven to rotate by a motor (2); A crankshaft (3) is inserted into the pump body (4), and a crankshaft oil hole (31) is formed by axially penetrating the interior of the crankshaft (3); A reducer (5) comprising an input shaft (51) connected to the power shaft (1), an output shaft (52) connected to the crankshaft (3), a transmission assembly connecting the input shaft (51) and the output shaft (52), and a housing (53) accommodating the input shaft (51), the output shaft (52) and the transmission assembly, wherein a space is provided between the transmission assembly and the housing (53), the input shaft (51) and the output shaft (52) are both sealed with the housing (53) so that the space is closed to form an oil storage cavity (54), an axial oil passage (55) penetrating along the axial direction and a connecting oil passage (56) connecting the axial oil passage (55) and the oil storage cavity (54) are provided inside the transmission assembly, and an end of the axial oil passage (55) close to the crankshaft (3) is connected to the crankshaft oil hole (31); The compressor housing (6) accommodates the motor (2), the power shaft (1), the reducer (5), the crankshaft (3) and the pump body (4); an oil pool (621) is provided at the bottom of a pump body side cavity (62) inside the compressor housing (6) that accommodates the pump body (4); the oil pool (621) provides lubricating oil to the crankshaft oil hole (31).

2. The compressor with a reducer according to claim 1, characterized in that: The outer shell (53) and the compressor housing (6) are spaced apart to form a cavity (63) outside the reducer. The outer shell (53) is provided with an oil outlet hole (57) communicating with the oil storage cavity (54) and the cavity (63) outside the reducer. The oil outlet hole (57) is located at an upper portion of the oil storage cavity (54).

3. The compressor with a reducer according to claim 2, characterized in that: One end of the pump body (4) close to the reducer (5) is connected to the compressor housing (6) through a cylinder cover (41); the cylinder cover (41) separates the outer cavity (63) of the reducer from the cavity (62) on the pump body side; and the cylinder cover (41) is provided with a flow hole (42) connecting the outer cavity (63) of the reducer with the oil pool (621).

4. The compressor with a reducer according to claim 1, characterized in that: The interior of the power shaft (1) is axially penetrated to form a power shaft oil hole (11), one end of the power shaft oil hole (11) is connected to an end of the axial oil passage (55) close to the power shaft (1), and the other end of the power shaft oil hole (11) is connected to a motor-side cavity (61) inside the compressor housing (6) for accommodating the motor (2).

5. The compressor with a reducer according to claim 4, characterized in that: One end of the reducer (5) close to the motor (2) is connected to the compressor housing (6) via a connecting frame (8); the power shaft (1) is rotatably inserted into the connecting frame (8) and forms a connecting frame friction pair with the connecting frame (8); an oil outlet passage (12) is also provided inside the power shaft (1) for connecting the power shaft oil hole (11) and the connecting frame friction pair.

6. The compressor with a reducer according to claim 5, characterized in that: The connecting frame (8) separates the motor side cavity (61) from the reducer outer cavity (63), and the connecting frame (8) is provided with an oil return hole (81) connecting the motor side cavity (61) and the reducer outer cavity (63).

7. The compressor with a reducer according to claim 4, characterized in that: A rotary vane (58) is provided in the axial oil passage (55).

8. The compressor with a reducer according to claim 7, characterized in that: The rotary vane (58) is located in the axial oil passage (55) on a side of the connecting oil passage (56) away from the crankshaft oil hole (31).

9. The compressor with a reducer according to any one of claims 1 to 8, characterized in that: The transmission assembly comprises a sun gear (591), a planet gear (592), a planet carrier (593) and a gear ring (594) arranged on the housing (53); one end of the sun gear (591) is connected to the input shaft (51) or is an integral part of an integral design, and the other end is meshed with one side of the planet gear (592); the other side of the planet gear (592) is meshed with the gear ring (594); one end of the planet carrier (593) is connected to the planet gear (592) and the other end is connected to the output shaft (52) or is an integral part of an integral design; the axial oil passage (55) passes through the sun gear (591) and the planet carrier (593); the connecting oil passage (56) is formed between the sun gear (591) and the planet carrier (593) along the axial interval.

10. The compressor with a reducer according to any one of claims 1 to 8, characterized in that: The pump body (4) is placed horizontally, the crankshaft (3) is arranged non-vertically with respect to the mounting surface on which the compressor housing (6) is mounted, and the power shaft (1) and the crankshaft (3) are arranged coaxially.

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