Low pressure screw blower multiway lubrication distribution device

Abstract

The application provides a low-pressure screw blower multi-path lubrication distribution device, which is provided with a blower shell, a transmission assembly and an oil supply lubrication heat dissipation assembly, the blower shell comprises a shell assembly and an oil tank assembly, the transmission assembly comprises a male rotor rotating shaft assembly and a female rotor rotating shaft assembly, and the oil supply lubrication heat dissipation assembly comprises a lubricating oil path assembly, an oil pump assembly and a lubricating oil path connecting assembly. The application solves the problems of the existing screw blower forced lubrication method, which can cause the oil pressure instability in each region of the blower, the insufficient lubricating oil amount of the driving gear and the bearing in the blower, the problem of the lubrication and heat dissipation not in place, and the problem of the existing forced lubrication technology which can only withstand the maximum 100kPa exhaust pressure. The application can be widely applied to the lubrication and heat dissipation of the screw blower.

Description

Technical Field

[0001] This invention relates to a screw blower, and more particularly to a multi-channel lubrication distribution device for a low-pressure screw blower. Background Technology

[0002] A screw blower is a gas conveying device based on the screw compression principle. It can compress and deliver gas to the required location by rotating the screw. It has the advantages of simple structure, good stability, energy saving and low noise, and can be widely used in industrial production, environmental protection and construction.

[0003] The screw blower has a male rotor and a female rotor installed inside. The male rotor and the female rotor rotate synchronously to realize the steps of air intake, compression and exhaust of the screw blower. Finally, the mechanical energy of the screw rotor is converted into the pressure and kinetic energy of the gas.

[0004] To ensure the long-term stable operation of screw blowers, it is necessary to adequately lubricate and dissipate heat from their internal components. Existing screw blower lubrication technologies are divided into two types: self-lubrication and forced lubrication. Self-lubrication typically employs splash lubrication technology, which involves agitating the oil through an internal oil slinger to splash lubricating oil onto components such as bearings and gears, thereby lubricating and cooling these components. However, current self-lubrication technology has a relatively low allowable exhaust pressure. When the exhaust pressure is high, forced lubrication technology is required to lubricate and dissipate heat from the internal components of the screw blower.

[0005] Most existing forced lubrication technologies involve connecting the screw blower to an external lubrication and cooling device. This means that the screw blower uses an external lubrication oil pipeline connected to an external oil pump, hydraulic oil tank, and other lubrication and cooling devices. The lubricating oil is then delivered to the gears and bearings of the blower through the oil inlet pipe to lubricate and cool them.

[0006] This forced lubrication technology is a single-path lubrication method, which means that all gears and bearings inside the blower are lubricated and cooled by a single main oil inlet pipe. This single-path lubrication method will cause the oil pressure to be unstable in different areas of the blower at different distances from the oil pump. As a result, some gears and bearings inside the blower will not receive enough lubricating oil, which will lead to inadequate lubrication and cooling, increase the wear of gears and bearings during rotation, and reduce their service life.

[0007] Furthermore, due to the limitations of this forced lubrication technology, it can only withstand a maximum exhaust pressure of 100 kPa. When the exhaust pressure exceeds 100 kPa, additional forced lubrication devices are required to meet the exhaust pressure requirements above 100 kPa. However, these additional forced lubrication devices are complex in structure and have too many connecting pipes, making installation and maintenance complicated and cumbersome for operators, resulting in a large workload. They also increase the weight and floor space of the Roots blower, increasing manufacturing costs. In addition, the excessive number of connecting pipes leads to multiple lubricant leaks, increasing the blower's failure rate and preventing it from operating stably for extended periods, thus shortening its service life. Summary of the Invention

[0008] To address the above-mentioned technical problems, this invention provides a multi-channel lubrication distribution device for low-pressure screw blowers. This device ensures stable oil pressure in areas of varying distance from the oil pump within the blower, guaranteeing a stable supply of lubricating oil to the drive gears and bearings. This provides stable lubrication and heat dissipation, reducing wear during rotation and extending service life. Furthermore, the device can withstand a maximum exhaust pressure of up to 140 kPa without requiring additional external forced lubrication devices, thus reducing the weight and footprint of the Roots blower and lowering manufacturing costs. Moreover, the absence of excessive external piping eliminates lubricating oil leakage, reducing the blower's failure rate and ensuring stable long-term operation, further extending its service life.

[0009] Therefore, the technical solution of the present invention is a multi-channel lubrication distribution device for a low-pressure screw blower, comprising a blower housing, a transmission assembly, and an oil supply, lubrication, and heat dissipation assembly;

[0010] The blower housing includes a housing assembly and an oil tank assembly. The drive end oil tank and the support end oil tank are fixed on both sides of the housing assembly, and the drive end oil tank and the support end oil tank together form the oil tank assembly.

[0011] The oil supply, lubrication and heat dissipation assembly includes a lubrication oil circuit assembly, an oil pump assembly, and a lubrication oil circuit connection assembly;

[0012] The lubrication circuit assembly is built into the blower housing, and the oil pump assembly and the inner surface of the support end oil tank are fixedly connected.

[0013] The lubrication circuit connection assembly and the support end oil tank are fixedly connected to the outside of the male rotor.

[0014] The lubrication circuit assembly, oil pump assembly, and lubrication circuit connection assembly are interconnected;

[0015] The lubrication circuit assembly includes a lubrication circuit at the male rotor end and a lubrication circuit at the female rotor end;

[0016] The oil pump assembly includes an oil pump with an oil pump suction port. An oil injection channel and an oil suction channel are respectively provided at the top and bottom positions of the outside of the support end oil tank and extend into the support end oil tank. The oil pump suction port, the oil suction channel and the inner cavity of the support end oil tank are connected in sequence. The oil pump has an oil pump outlet port. The oil pump suction port and the oil pump outlet port are connected through the internal pipeline of the oil pump. A fourth oil outlet channel is built into the inside of the support end oil tank. One end of the oil pump outlet port and the fourth oil outlet channel are fixedly connected. The other end of the fourth oil outlet channel extends to the outer surface of the support end oil tank near the male rotor.

[0017] The lubrication circuit connection assembly includes a lubrication circuit connection seat and a filter. The lubrication circuit connection seat and the support end oil tank are fixedly connected to the side near the male rotor.

[0018] The lubricating oil circuit connector is equipped with a filter connector. The filter is fixedly connected to the lubricating oil circuit connector through the filter connector. The outer surface of the lubricating oil circuit connector is provided with an oil inlet channel hole on the side near the support end oil tank. The oil inlet channel hole and the end of the fourth oil outlet channel away from the oil pump outlet hole are fixedly connected. The outer surface of the lubricating oil circuit connector on the side of the filter connector is provided with an oil outlet channel hole. An internal connecting channel of the lubricating oil circuit connector is provided between the oil inlet channel hole and the oil outlet channel hole. The oil inlet channel hole, the oil outlet channel hole and the internal connecting channel of the lubricating oil circuit connector are interconnected. The outer surface of the lubricating oil circuit connector on the side of the filter connector is provided with a return oil channel hole. The oil outlet channel hole and the return oil channel hole are interconnected with the oil inlet hole and the oil outlet hole of the internal filter pipe of the filter, respectively.

[0019] The material used for the lubrication circuit connector is cast aluminum alloy.

[0020] Preferably, the housing assembly includes an intake housing and an exhaust housing, both of which have hollow internal structures. The internal hollow structures of the intake housing and the exhaust housing are combined to form an inner cavity of the housing. The drive end oil tank has a drive end oil tank inner cavity, and the support end oil tank has a support end oil tank inner cavity.

[0021] An intake pipe is fixedly installed on the upper part of the intake housing, and an intake port is provided on the outer side of the intake pipe. An exhaust pipe is fixedly installed on the upper part of the exhaust housing, and an exhaust port is provided on the outer side of the exhaust pipe.

[0022] The intake pipe and the inner cavity of the intake housing are interconnected, and the exhaust pipe and the inner cavity of the exhaust housing are interconnected.

[0023] The transmission assembly includes a male rotor rotating shaft assembly and a female rotor rotating shaft assembly. The male rotor rotating shaft assembly and the female rotor rotating shaft assembly are fixedly arranged along the axial direction inside the blower housing. The male rotor rotating shaft assembly has a male rotor in the middle position. The two ends of the male rotor rotating shaft assembly have a male rotor drive end rotating shaft section and a male rotor support end rotating shaft section, respectively. The male rotor drive end rotating shaft section extends axially to the outside of the drive end oil tank. The female rotor rotating shaft assembly has a female rotor in the middle position. The two ends of the female rotor rotating shaft assembly have a female rotor drive end rotating shaft section and a female rotor support end rotating shaft section, respectively.

[0024] The male rotor and the female rotor are each provided with helical blades, and the male rotor and the female rotor are rotatably connected by the helical blades.

[0025] The male and female rotors are rotatably and sealed to the inner surface of the inner cavity.

[0026] The outer and inner rotating shaft sections of the male rotor drive end rotating shaft section are rotatably connected to the inner cavity of the drive end oil tank and the inner cavity of the machine housing, respectively. The outer and inner rotating shaft sections of the male rotor support end rotating shaft section are rotatably connected to the inner cavity of the support end oil tank and the inner cavity of the machine housing, respectively.

[0027] The outer and inner rotating shaft sections of the female rotor drive end rotating shaft section are rotatably connected to the inner cavity of the drive end oil tank and the inner cavity of the machine housing, respectively. The outer and inner rotating shaft sections of the female rotor support end rotating shaft section are rotatably connected to the inner cavity of the support end oil tank and the inner cavity of the machine housing, respectively.

[0028] The outer circumferences of the male rotor drive end rotating shaft section and the female rotor drive end rotating shaft section are respectively fixed with a male rotor drive gear and a female rotor drive gear;

[0029] A thrust bearing and a support bearing are fixedly provided on the outer circumference of the rotating shaft section at the driving end of the male rotor, and a thrust bearing is fixedly provided on the outer circumference of the rotating shaft section at the support end of the male rotor.

[0030] A thrust bearing and a support bearing are fixedly provided on the outer circumference of the rotating shaft section at the driving end of the female rotor, and a thrust bearing is fixedly provided on the outer circumference of the rotating shaft section at the support end of the female rotor.

[0031] The lubrication circuit at the male rotor end includes the lubrication circuit for the male rotor drive gear, the lubrication circuit for the male rotor drive end bearing, the lubrication circuit for the male rotor support end bearing, and the transition circuit at the male rotor end. The lubrication circuit at the female rotor end includes the lubrication circuit for the female rotor drive gear, the lubrication circuit for the female rotor drive end bearing, the lubrication circuit for the female rotor support end bearing, and the transition circuit at the female rotor end.

[0032] The lubrication circuits for the male rotor drive gear, the male rotor drive end bearing, and the male rotor support end bearing are radially located inside the drive end oil tank, the exhaust housing, and the support end oil tank near the male rotor. The transition oil circuit for the male rotor end passes axially through the drive end oil tank, the exhaust housing, the intake housing, and the support end oil tank near the male rotor. One end of each of the lubrication circuits for the male rotor drive gear, the male rotor drive end bearing, and the male rotor support end bearing is fixedly connected to the transition oil circuit for the male rotor end. The other ends of each of these circuits are aligned with the male rotor drive gear, the male rotor drive end bearing, and the male rotor support end bearing, respectively.

[0033] The lubrication lines for the female rotor drive gear, the female rotor drive end bearing, and the female rotor support end bearing are radially located inside the drive end oil tank, the exhaust housing, and the support end oil tank near the female rotor. The female rotor end transition oil passage passes axially through the drive end oil tank, the exhaust housing, the intake housing, and the support end oil tank near the female rotor. One end of each of the female rotor drive gear lubrication lines, the female rotor drive end bearing lubrication lines, and the female rotor support end bearing lubrication lines is fixedly connected to the female rotor end transition oil passage. The other ends of each of these lines are aligned with the female rotor drive gear, the female rotor drive end bearing lubrication lines, and the female rotor support end bearing lubrication lines, respectively, and are aligned with the thrust bearing and support bearing on the outer circumference of the female rotor drive gear, the female rotor drive end rotating shaft section, and the female rotor support end rotating shaft section.

[0034] Preferably, the interior of the support end oil tank is provided with a transition connection channel in the radial direction, and both ends of the transition connection channel penetrate through the outer surface of the support end oil tank.

[0035] Preferably, the lubricating oil circuit connector is a low-pressure lubricating oil circuit connector. The lubricating oil circuit connector has a first oil inlet channel inside, and the oil return channel hole is interconnected with the first oil inlet channel. The lubricating oil circuit connector has a first transition channel and a first oil outlet channel inside. One end of the first transition channel and the first oil outlet channel are interconnected with the first oil inlet channel, respectively. The other end of the first transition channel is fixedly connected to one end of the transition connecting channel. The other end of the transition connecting channel is fixedly connected to the female rotor end transition oil circuit inside the support end oil tank. The other end of the first oil outlet channel is fixedly connected to the male rotor end transition oil circuit inside the support end oil tank.

[0036] Preferably, an oil distribution block is fixedly provided on the outside of the support end oil tank near the female rotor. The oil distribution block has a second buffer channel inside, a second transition channel and a second oil outlet channel inside. One end of the second transition channel and the second oil outlet channel are respectively connected to the second buffer channel. The other end of the second transition channel is fixedly connected to the end of the transition connection channel away from the first transition channel. The other end of the second oil outlet channel is fixedly connected to the female rotor end transition oil circuit inside the support end oil tank.

[0037] Preferably, the lubrication oil circuits of the male rotor drive gear, the male rotor support end bearing, the female rotor drive gear, and the female rotor support end bearing are respectively fixedly provided with oil nozzles at the foremost front ends of the thrust bearings on the outer circumference of the male rotor drive gear, the male rotor support end rotating shaft section, the female rotor drive gear, and the female rotor support end rotating shaft section.

[0038] Preferably, a hollow positioning pin is fixed at the axial connection between the male rotor end transition oil passage and the female rotor end transition oil passage inside the drive end oil tank and the male rotor end transition oil passage and the female rotor end transition oil passage inside the exhaust casing, respectively. An axial through hole is provided in the middle of the hollow positioning pin. The male rotor end transition oil passage inside the drive end oil tank and the female rotor end transition oil passage inside the exhaust casing are interconnected through the through hole.

[0039] Hollow positioning pins are fixed at the axial connection points of the male rotor end transition oil passage and the female rotor end transition oil passage inside the exhaust housing and the male rotor end transition oil passage and the female rotor end transition oil passage inside the intake housing, respectively. An axial through hole is provided in the middle of the hollow positioning pin. The male rotor end transition oil passage inside the exhaust housing and the female rotor end transition oil passage inside the intake housing are interconnected through the through hole.

[0040] Hollow locating pins are fixed at the axial connection points of the male rotor end transition oil passage and the female rotor end transition oil passage inside the intake housing and the male rotor end transition oil passage and the female rotor end transition oil passage inside the support end oil tank, respectively. An axial through hole is provided in the middle of the hollow locating pin. The male rotor end transition oil passage inside the intake housing and the female rotor end transition oil passage inside the support end oil tank are interconnected through the through hole.

[0041] Preferably, sealing rings are fixedly provided on both radial sides of the hollow positioning pin at the axial connection points of the drive end oil tank and the exhaust housing, the exhaust housing and the intake housing, and the intake housing and the support end oil tank.

[0042] Preferably, detection oil passages are connected to the lubrication oil passages of the male rotor drive gear, the male rotor drive end bearing, the male rotor support end bearing, the female rotor drive gear, the female rotor drive end bearing, and the female rotor support end bearing, respectively. The detection oil passages extend to the outer surface of the blower housing, and a sealing plug is fixedly provided at the oil passage opening on the outer surface of the blower housing.

[0043] The beneficial effects of this invention are:

[0044] 1. By embedding the lubrication circuit inside the blower housing, excessive external lubrication lines are avoided, making installation and maintenance more convenient for operators, reducing the overall weight and footprint of the blower, and lowering manufacturing costs. At the same time, the lubrication circuit being embedded inside the blower housing prevents the problem of lubrication leakage.

[0045] Furthermore, the blower housing is equipped with separate lubrication circuits for the female rotor drive end bearing, female rotor drive gear, female rotor support end bearing, male rotor drive gear, male rotor drive end bearing, and male rotor support end bearing, respectively. This allows for precise oil spraying lubrication of the thrust bearing, support bearing, and drive gear inside the blower housing, ensuring sufficient lubrication for these components.

[0046] 2. By combining the lubrication circuit connector, filter, and oil separator, the lubrication and heat dissipation requirements of the internal components of the screw blower are met when the maximum exhaust pressure is no higher than 140 kPa. The oil pump draws the lubricating oil from the oil tank at the support end into the lubrication circuit connector. Since the lubrication circuit connector is made of cast aluminum alloy, when the lubricating oil enters the lubrication circuit connector, it will carry away some of the heat of the lubricating oil, thus playing a role in heat dissipation and cooling. Then, it enters the filter through the internal connection channel of the lubrication circuit connector. The filter effectively filters the lubricating oil, removing impurities mixed in with the lubricating oil, ensuring the cleanliness of the lubricating oil, and extending the service life of the lubricating oil. The filtered lubricating oil enters the first oil inlet channel through the return oil channel hole. At this time, the lubrication circuit connector can perform secondary heat dissipation and cooling on the incoming lubricating oil.

[0047] Part of the lubricating oil inside the first oil inlet channel enters the second transition channel. The lubricating oil in the second transition channel then passes through the second buffer channel, the second oil outlet channel, and the female rotor end transition oil passage to enter the female rotor drive gear lubricating oil passage, the female rotor drive end bearing lubricating oil passage, and the female rotor support end bearing lubricating oil passage, respectively, to spray lubricate the drive gear, thrust bearing, and support bearing on one side of the female rotor end lubricating oil passage. Another part of the lubricating oil passes through the first oil outlet channel and the male rotor end transition oil passage to enter the male rotor drive gear lubricating oil passage, the male rotor drive end bearing lubricating oil passage, and the male rotor support end bearing lubricating oil passage, respectively, to spray lubricate the drive gear, thrust bearing, and support bearing on one side of the male rotor end lubricating oil passage.

[0048] Because the second transition channel, the second oil outlet channel, and the second buffer channel are positioned perpendicular to each other, when the lubricating oil passes through the second transition channel, the second buffer channel, and the second oil outlet channel in sequence, the perpendicular angle between the second transition channel, the second oil outlet channel, and the second buffer channel can buffer and pressurize the lubricating oil. This increases the supply of lubricating oil on the male rotor end lubricating oil circuit side, preventing insufficient lubricating oil injection pressure due to the large distance between the female rotor end lubricating oil circuit and the lubricating oil circuit connection seat. This avoids insufficient lubricating oil in the drive gear, thrust bearing, and support bearing on the female rotor end lubricating oil circuit side, further ensuring that the drive gear, thrust bearing, and support bearing on both the male rotor end lubricating oil circuit side and the female rotor end lubricating oil circuit side have sufficient lubrication and heat dissipation effects.

[0049] 3. Channel holes and detection oil passages are provided in the lubrication oil connection seat, oil distribution block, lubrication oil passage at the male rotor end, and lubrication oil passage at the female rotor end. Temperature sensors, pressure sensors, and other related detection devices can be installed in the channel holes and detection oil passages as needed to monitor the lubrication oil status in the corresponding oil passages in real time. This design allows for the immediate detection and resolution of any faults in a particular oil passage, preventing the accumulation of faults due to significant abnormalities in oil pressure or temperature that go undetected, which could increase maintenance difficulty and costs, or even lead to major safety accidents. Attached Figure Description

[0050] Figure 1 This is a three-dimensional view of the screw blower structure used in this invention;

[0051] Figure 2 This is a front view of the screw blower used in this invention;

[0052] Figure 3 This is the present invention. Figure 2 Sectional view of TT;

[0053] Figure 4 This is the present invention. Figure 2 PP section view;

[0054] Figure 5 This is the present invention. Figure 2 Sectional view of UU;

[0055] Figure 6 This is a perspective view of the present invention;

[0056] Figure 7 This is the main view of the present invention;

[0057] Figure 8 This is the left view of the present invention;

[0058] Figure 9 This is the right view of the present invention;

[0059] Figure 10 This is the present invention. Figure 7 MM section view;

[0060] Figure 11 This is the present invention. Figure 7 YY sectional view;

[0061] Figure 12 This is the present invention. Figure 3 Enlarged view at point D;

[0062] Figure 13 This is the present invention. Figure 5 Enlarged view of section S in the middle;

[0063] Figure 14 This is the present invention. Figure 5 Enlarged view at the middle T;

[0064] Figure 15 This is the present invention. Figure 4 QQ cross-sectional view;

[0065] Figure 16 This is the present invention. Figure 4 Middle RR section view;

[0066] Figure 17 This is a schematic diagram of the lubrication oil circuit distribution of the screw blower used in this invention.

[0067] Explanation of symbols in the diagram:

[0068] 1. Oil tank assembly; 101. Drive end oil tank; 102. Support end oil tank; 10205. Transition connection channel; 10206. Fourth oil outlet channel; 2. Housing assembly; 201. Exhaust housing; 20101. Exhaust port; 20104. Exhaust pipe; 202. Intake housing; 20201. Intake port; 20206. Intake pipe; 3. Lubricating oil circuit connection assembly; 301. Lubricating oil circuit connection seat; 30101. Oil inlet channel hole; 30102. Oil outlet channel hole; 30103. Oil return channel hole; 30104. Locking and fixing hole; 30105. Filter connection seat; 30106. First oil inlet channel; 30108. Spare channel; 30109. First transition channel; 30110. First oil outlet channel; 30111. Internal connection channel of lubricating oil circuit connector; 30112. First channel hole; 30113. Second channel hole; 302. Filter; 4. Oil pump assembly; 401. Oil pump; 405. Oil pump suction hole; 406. Oil pump outlet hole; 5. Male rotor rotating shaft assembly; 501. Male rotor; 502. Male rotor drive end rotating shaft section; 503. Male rotor support end rotating shaft section; 6. Female rotor rotating shaft assembly; 601. Female rotor; 602. Female rotor drive end rotating shaft section; 603. Female rotor support end rotating shaft section; 10. Male rotor drive gear; 11. Lubricating oil circuit assembly; 1101. Male rotor... Male rotor drive gear lubrication circuit; 110101. Male rotor drive end bearing lubrication circuit; 110102. Male rotor drive end bearing lubrication circuit; 110103. Male rotor support end bearing lubrication circuit; 110104. Male rotor end transition oil circuit; 1102. Female rotor end lubrication circuit; 110201. Female rotor drive gear lubrication circuit; 110202. Female rotor drive end bearing lubrication circuit; 110203. Female rotor support end bearing lubrication circuit; 110204. Female rotor end transition oil circuit; 1103. Detection oil circuit; 1107. Oil injector; 14. Thrust bearing; 17. Hollow positioning pin; 1701. Through hole; 18. Oil distribution block; 1801. First channel 1802. Second channel hole; 1803. Second buffer channel; 1804. Second transition channel; 1805. Second oil outlet channel; 19. Sealing plug; 20. Locking screw; 21. Oil injection channel; 2101. Oil injection filter element; 22. Oil suction channel; 2201. Oil suction filter hole; 23. Sealing ring; 25. Drive end fixed support; 2501. Mounting hole; 26. Support end fixed support; 2601. Mounting hole; 29. ​​Support bearing; 30. Female rotor drive gear; 31. Blower housing; 3103. Housing inner cavity; 3104. Drive end oil tank inner cavity; 3105. Support end oil tank inner cavity; 36. Oil return pipeline; 37. Oil return groove. Detailed Implementation

[0069] The present invention will be further described below with reference to embodiments.

[0070] pass Figures 1-17 It can be seen that the low-pressure screw blower multi-channel lubrication distribution device includes a blower housing 31, a transmission assembly, and an oil supply, lubrication, and heat dissipation assembly.

[0071] The blower housing 31 includes a housing assembly 2 and an oil tank assembly 1. A drive end oil tank 101 and a support end oil tank 102 are fixedly installed on both sides of the housing assembly 2, and the drive end oil tank 101 and the support end oil tank 102 together form the oil tank assembly 1.

[0072] The housing assembly 2 includes an intake housing 202 and an exhaust housing 201. Both the intake housing 202 and the exhaust housing 201 have hollow internal structures. The internal hollow structures of the intake housing 202 and the exhaust housing 201 are combined to form the housing inner cavity 3103. The drive end oil tank 101 has a drive end oil tank inner cavity 3104 inside, and the support end oil tank 102 has a support end oil tank inner cavity 3105 inside. The support end oil tank inner cavity 3105 is filled with lubricating oil.

[0073] An intake pipe 20206 is fixedly provided on the upper part of the intake housing 202, and an intake port 20201 is provided on the outer port of the intake pipe 20206. An exhaust pipe 20104 is fixedly provided on the upper part of the exhaust housing 201, and an exhaust port 20101 is provided on the outer port of the exhaust pipe 20104.

[0074] The intake pipe 20206 and the inner cavity 3103 inside the intake housing 202 are interconnected, and the exhaust pipe 20104 and the inner cavity 3103 inside the exhaust housing 201 are interconnected.

[0075] The transmission assembly includes a male rotor rotating shaft assembly 5 and a female rotor rotating shaft assembly 6. The male rotor rotating shaft assembly 5 and the female rotor rotating shaft assembly 6 are fixedly arranged along the axial direction inside the blower housing 31. A male rotor 501 is provided at the middle position of the male rotor rotating shaft assembly 5. A male rotor drive end rotating shaft section 502 and a male rotor support end rotating shaft section 503 are respectively provided at both ends of the male rotor rotating shaft assembly 5. The male rotor drive end rotating shaft section 502 extends axially to the outside of the drive end oil tank 101. A female rotor 601 is provided at the middle position of the female rotor rotating shaft assembly 6. A female rotor drive end rotating shaft section 602 and a female rotor support end rotating shaft section 603 are respectively provided at both ends of the female rotor rotating shaft assembly 6.

[0076] The male rotor 501 and the female rotor 601 are respectively provided with helical blades, and the male rotor 501 and the female rotor 601 are rotatably connected by the helical blades.

[0077] The male rotor 501 and the female rotor 601 are rotatably connected to the inner surface of the inner cavity.

[0078] The outer and inner rotating shaft sections of the male rotor drive end rotating shaft section 502 are rotatably connected to the inner cavity of the drive end oil tank 3104 and the inner cavity of the housing 3103, respectively. The outer and inner rotating shaft sections of the male rotor support end rotating shaft section 503 are rotatably connected to the inner cavity of the support end oil tank 3105 and the inner cavity of the housing 3103, respectively.

[0079] The outer and inner rotating shaft sections of the female rotor drive end rotating shaft section 602 are rotatably connected to the inner cavity of the drive end oil tank 3104 and the inner cavity of the housing 3103, respectively. The outer and inner rotating shaft sections of the female rotor support end rotating shaft section 603 are rotatably connected to the inner cavity of the support end oil tank 3105 and the inner cavity of the housing 3103, respectively.

[0080] The outer circumferences of the male rotor drive end rotating shaft section 502 and the female rotor drive end rotating shaft section 602 are respectively fixed with a male rotor drive gear 10 and a female rotor drive gear 30.

[0081] A thrust bearing 14 and a support bearing 29 are fixedly provided on the outer circumference of the rotating shaft section 502 at the driving end of the male rotor, and a thrust bearing 14 is fixedly provided on the outer circumference of the rotating shaft section 503 at the support end of the male rotor.

[0082] A thrust bearing 14 and a support bearing 29 are fixedly provided on the outer circumference of the rotating shaft section 602 at the driving end of the female rotor, and a thrust bearing 14 is fixedly provided on the outer circumference of the rotating shaft section 603 at the supporting end of the female rotor.

[0083] The oil supply, lubrication and heat dissipation assembly includes a lubrication circuit assembly 11, an oil pump assembly 4, and a lubrication circuit connection assembly 3.

[0084] The lubrication circuit assembly 11 is built inside the blower housing 31, and the oil pump assembly 4 is located inside the support end oil tank 102. The oil pump assembly 4 and the inner surface of the support end oil tank 102 are fixedly connected.

[0085] The lubricating oil circuit connection assembly 3 is located outside the support end oil tank 102, and the lubricating oil circuit connection assembly 3 is fixedly connected to the outside of the support end oil tank 102 on the side near the male rotor 501.

[0086] The lubrication circuit assembly 11, the oil pump assembly 4, and the lubrication circuit connection assembly 3 are interconnected.

[0087] The lubrication circuit assembly 11 includes a male rotor end lubrication circuit 1101 and a female rotor end lubrication circuit 1102.

[0088] The male rotor end lubrication oil passage 1101 includes a male rotor drive gear lubrication oil passage 110101, a male rotor drive end bearing lubrication oil passage 110102, a male rotor support end bearing lubrication oil passage 110103, and a male rotor end transition oil passage 110104. The female rotor end lubrication oil passage 1102 includes a female rotor drive gear lubrication oil passage 110201, a female rotor drive end bearing lubrication oil passage 110202, a female rotor support end bearing lubrication oil passage 110203, and a female rotor end transition oil passage 110204.

[0089] The lubrication oil passages 110101, 110102, and 110103 for the male rotor drive gear, drive end bearing, and support end bearing are respectively radially arranged inside the drive end oil tank 101, exhaust housing 201, and support end oil tank 102 on the side near the male rotor 501. The male rotor end transition oil passage 110104 axially passes through the drive end oil tank 101, exhaust housing 201, intake housing 202, and support end oil tank 102 on the side near the male rotor 501. The lubrication oil passages 110101 and 110103 for the male rotor drive gear, drive end bearing, and support end bearing are respectively radially arranged inside the drive end oil tank 101, exhaust housing 201, and support end oil tank 102. One end of the lubrication oil passage 110102 of the drive end bearing and the lubrication oil passage 110103 of the male rotor support end bearing are fixedly connected to the transition oil passage 110104 of the male rotor end. The other ends of the lubrication oil passage 110101 of the male rotor drive gear, the lubrication oil passage 110102 of the male rotor drive end bearing and the lubrication oil passage 110103 of the male rotor support end bearing are respectively aligned with the thrust bearing 14 and the support bearing 29 on the outer circumference of the male rotor drive gear 10, the male rotor drive end rotating shaft section 502, and the thrust bearing 14 on the outer circumference of the male rotor support end rotating shaft section 503.

[0090] The female rotor drive gear lubrication oil passage 110201, the female rotor drive end bearing lubrication oil passage 110202, and the female rotor support end bearing lubrication oil passage 110203 are respectively radially arranged inside the drive end oil tank 101, the exhaust housing 201, and the support end oil tank 102 on the side near the female rotor 601. The female rotor end transition oil passage 110204 sequentially and axially passes through the drive end oil tank 101, the exhaust housing 201, the intake housing 202, and the support end oil tank 102 on the side near the female rotor 601. The female rotor drive gear lubrication oil passage 110201, the female rotor... One end of the drive end bearing lubrication oil passage 110202 and the female rotor support end bearing lubrication oil passage 110203 are fixedly connected to the female rotor end transition oil passage 110204, respectively. The other ends of the female rotor drive gear lubrication oil passage 110201, the female rotor drive end bearing lubrication oil passage 110202 and the female rotor support end bearing lubrication oil passage 110203 are respectively aligned with the female rotor drive gear 30, the thrust bearing 14 and the support bearing 29 on the outer circumference of the female rotor drive end rotating shaft section 602, and the thrust bearing 14 on the outer circumference of the female rotor support end rotating shaft section 603.

[0091] Independent lubrication and heat dissipation channels are formed for the male and female rotor drive gears, the thrust bearings 14 and 29 on the outer circumference of the rotating shaft section at the male and female rotor drive ends, and the thrust bearings 14 on the outer circumference of the rotating shaft section at the male and female rotor support ends. This enables precise oil spraying to these components, ensuring that they receive sufficient lubrication and cooling, extending their service life, and reducing the noise generated during blower operation. It is particularly important to note that the spray nozzles of the female rotor drive gear lubrication oil passage 110201 and the male rotor drive gear lubrication oil passage 110101 are respectively aligned with the drive gear... The arrangement of the gears at the gear tips after engagement ensures sufficient lubrication of the drive gears and a more significant cooling effect. Furthermore, the injection ports of the lubrication oil circuits 110203 and 110103 of the female rotor support end bearings are aligned with the inner ring of the thrust bearing 14 on the outer circumference of the rotating shaft section of the male and female rotor support ends, respectively. This further ensures the stability of the thrust bearing 14 during long-term high-speed rotation, reduces the noise generated when the thrust bearing 14 rotates, and ensures that the thrust bearing 14 has sufficient lubrication and cooling effect.

[0092] The oil pump assembly 4 includes an oil pump 401, which has an oil pump suction port 405. An oil injection channel 21 and an oil suction channel 22 are respectively provided at the top and bottom positions of the outer side of the support end oil tank 102 and extend into the support end oil tank 102. The oil pump suction port 405, the oil suction channel 22 and the inner cavity 3105 of the support end oil tank are connected in sequence. The oil pump 401 has an oil pump outlet port 406. The oil pump suction port 405 and the oil pump outlet port 406 are connected through the internal pipeline of the oil pump. A fourth oil outlet channel 10206 is built into the inside of the support end oil tank 102. One end of the oil pump outlet port 406 and the fourth oil outlet channel 10206 are fixedly connected, and the other end of the fourth oil outlet channel 10206 extends to the outer surface of the support end oil tank 102 near the male rotor 501.

[0093] The lubricating oil circuit connection assembly 3 includes a lubricating oil circuit connection seat 301 and a filter 302. The lubricating oil circuit connection seat 301 is fixedly connected to the outside of the support end oil tank 102 near the male rotor 501.

[0094] When the blower is running, the oil pump assembly 4 delivers the lubricating oil inside the support end oil tank 102 to the lubricating oil circuit connection assembly 3 through the fourth oil outlet channel 10206. The lubricating oil is filtered and cooled by the lubricating oil circuit connection assembly 3. The filtered and cooled lubricating oil is delivered to the lubricating oil circuit 110101 of the male rotor drive gear, the lubricating oil circuit 110102 of the male rotor drive end bearing, the lubricating oil circuit 110103 of the male rotor support end bearing, the lubricating oil circuit 110201 of the female rotor drive gear, the lubricating oil circuit 110202 of the female rotor drive end bearing, and the lubricating oil circuit 110203 of the female rotor support end bearing, thereby lubricating and cooling the corresponding drive gears and bearings.

[0095] The lubricating oil circuit connector 301 is a low-pressure lubricating oil circuit connector. The material used for the lubricating oil circuit connector 301 is cast aluminum alloy, which can provide some heat dissipation and cooling for the lubricating oil inside the connector 301. A filter connector 30105 is provided on the lubricating oil circuit connector 301, and the filter 302 is fixedly connected to the lubricating oil circuit connector 301 through the filter connector 30105. An oil inlet channel hole 30101 is provided on the outer surface of the lubricating oil circuit connector 301 near the support end oil tank 102. The oil inlet channel hole 30101 and the end of the fourth oil outlet channel 10206 away from the oil pump outlet hole 406 are fixedly connected. The outer surface of the lubricating oil connection seat 301 located on the side of the filter connection seat 30105 is provided with an oil outlet channel hole 30102. An internal connecting channel 30111 of the lubricating oil connection seat is provided between the oil inlet channel hole 30101 and the oil outlet channel hole 30102. The oil inlet channel hole 30101, the oil outlet channel hole 30102 and the internal connecting channel 30111 of the lubricating oil connection seat are interconnected. The outer surface of the lubricating oil connection seat 301 located on the side of the filter connection seat 30105 is provided with a return oil channel hole 30103. The oil outlet channel hole 30102 and the return oil channel hole 30103 are interconnected with the oil inlet hole and the oil outlet hole of the internal filter pipe of the filter 302, respectively.

[0096] The interior of the support end oil tank 102 is provided with a transition connection channel 10205 in the radial direction, and both ends of the transition connection channel 10205 penetrate through the outer surface of the support end oil tank 102.

[0097] The lubricating oil circuit connector 301 has a first oil inlet channel 30106 inside. The oil return channel hole 30103 is connected to the first oil inlet channel 30106. The lubricating oil circuit connector 301 has a first transition channel 30109 and a first oil outlet channel 30110 inside. One end of the first transition channel 30109 and the first oil outlet channel 30110 are connected to the first oil inlet channel 30106 respectively. The positions of the first transition channel 30109 and the first oil outlet channel 30110 are respectively set perpendicular to the positions of the first oil inlet channel 30106. The other end of the first transition channel 30109 is fixedly connected to one end of the transition connection channel 10205. The other end of the transition connection channel 10205 is fixedly connected to the female rotor end transition oil circuit 110204 inside the support end oil tank 102. The other end of the first oil outlet channel 30110 is fixedly connected to the male rotor end transition oil circuit 110104 inside the support end oil tank 102.

[0098] After being filtered by filter 302, the lubricating oil enters the first oil inlet channel 30106 through the oil return channel hole 30103. At this time, a portion of the lubricating oil passes through the first oil outlet channel 30110 and enters the male rotor end transition oil passage 110104. Then, through the male rotor end transition oil passage 110104, it enters the male rotor drive gear lubricating oil passage 110101, the male rotor drive end bearing lubricating oil passage 110102, and the male rotor support end bearing lubricating oil passage 110103 respectively, thus lubricating the drive gear and thrust on the male rotor end lubricating oil passage 1101 side. The bearings and support bearings are lubricated and cooled by spraying oil. A portion of the lubricating oil enters the female rotor end transition oil passage 110204 through the first transition channel 30109 and the transition connection channel 10205. Then, it enters the drive gear lubricating oil passage 110201, the female rotor drive end bearing lubricating oil passage 110202, and the female rotor support end bearing lubricating oil passage 110203 through the female rotor end transition oil passage 110204, respectively, to lubricate and cool the drive gear, thrust bearing, and support bearing on the female rotor end lubricating oil passage 1102.

[0099] Since the lubrication oil passages 110201, 110202, and 110203 of the female rotor drive end bearing are relatively far from the lubrication oil passage connection seat 301, the number of first transition channels 30109 is set to multiple. This can increase the supply of lubricating oil on one side of the female rotor end lubrication oil passage 1102, ensuring that there is sufficient pressure in both the male rotor end lubrication oil passage 1101 and the female rotor end lubrication oil passage 1102, and ensuring that the drive gear, thrust bearing, and support bearing on the male rotor rotating shaft assembly 5 and the female rotor rotating shaft assembly 6 can be adequately lubricated and cooled.

[0100] An oil distribution block 18 is fixedly provided on the outside of the support end oil tank 102 near the female rotor 601. The oil distribution block 18 has a second buffer channel 1803 inside, a second transition channel 1804 inside, and a second oil outlet channel 1805 inside. One end of the second transition channel 1804 and the second oil outlet channel 1805 are respectively connected to the second buffer channel 1803. The second transition channel 1804 and the second oil outlet channel 1805 are respectively set at a perpendicular angle to the second buffer channel 1803. The other end of the second transition channel 1804 is fixedly connected to the end of the transition connection channel 10205 away from the first transition channel 30109. The other end of the second oil outlet channel 1805 is fixedly connected to the female rotor end transition oil passage 110204 inside the support end oil tank 102.

[0101] By setting the oil distribution block 18, after the lubricating oil enters the first oil inlet channel 30106, a portion of the lubricating oil sequentially passes through the first oil outlet channel 30110 and the male rotor end transition oil passage 110104 to enter the male rotor drive gear lubricating oil passage 110101, the male rotor drive end bearing lubricating oil passage 110102, and the male rotor support end bearing lubricating oil passage 110103, respectively, to spray lubricate the drive gear, thrust bearing, and support bearing on the side of the male rotor end lubricating oil passage 1101. Another portion of the lubricating oil sequentially passes through the first transition channel 30109, the transition connection channel 10205, the second transition channel 1804, and the second buffer channel 1803 to enter the interior of the second oil outlet channel 1805. At this time, the lubricating oil is buffered and pressurized by the vertical angle between the second transition channel 1804, the second buffer channel 1803, and the second oil outlet channel 1805. The buffered and pressurized lubricating oil then sequentially passes through the second oil outlet channel. Channel 1805 and the female rotor end transition oil passage 110204 respectively enter the drive gear lubrication oil passage 110201, the female rotor drive end bearing lubrication oil passage 110202, and the female rotor support end bearing lubrication oil passage 110203, providing oil spray lubrication to the drive gear, thrust bearing, and support bearing on the female rotor end lubrication oil passage 1102 side. Through the buffer pressurization of the internal channel of the oil distribution block 18, the supply of lubricating oil on the female rotor end lubrication oil passage 1102 side can be increased. This avoids the problem of insufficient lubrication and cooling effect on the drive gear, thrust bearing, and support bearing on the female rotor end lubrication oil passage 1102 side due to insufficient lubrication oil spray pressure caused by the large distance between the lubrication oil passage and the lubrication oil passage connection seat 301. This further ensures that the drive gear, thrust bearing, and support bearing on the male and female rotors have sufficient lubrication and heat dissipation effects, extending the overall service life of the blower.

[0102] A more preferred embodiment of the structure of the lubricating oil circuit connector 301 and the oil distribution block 18 is that the first oil inlet channel 30106 has a first channel hole 30112 and a second channel hole 30113 at both ends, the first channel hole 30112 and the second channel hole 30113 extend to the outer surface of the lubricating oil circuit connector 301, and a sealing plug 19 is fixedly provided at the position of the first channel hole 30112 and the second channel hole 30113 on the outer surface of the lubricating oil circuit connector 301. The second buffer channel 1803 has a first channel hole 1801 and a second channel hole 1802 at both ends, the first channel hole 1801 and the second channel hole 1802 extend to the outer surface of the oil distribution block 18, and a sealing plug 19 is fixedly provided on the first channel hole 1801 and the second channel hole 1802. According to actual needs, the sealing plug 19 can be opened, and temperature sensors, pressure sensors and other related detection devices can be installed on the first channel hole 30112 and the second channel hole 30113 to monitor the lubricating oil status in the lubricating oil circuit connector 301 and the oil distribution block 18 in real time. With this design, when the lubricating oil in the lubricating oil circuit connector 301 and the oil distribution block 18 is abnormal, it can be detected and resolved in time, avoiding the failure to detect it in time, which will lead to the accumulation of faults for too long, increase the difficulty of maintenance and increase the maintenance cost, or even cause major safety accidents.

[0103] Oil nozzles 1107 are fixedly provided at the front ends of the thrust bearings 14 on the outer circumference of the male rotor drive gear 10, the male rotor support end bearing 503, the female rotor drive gear 30, and the female rotor support end bearing 603.

[0104] The inner diameter of the oil injector 1107 is smaller than that of the aforementioned lubrication circuit. The oil injector 1107 allows for more precise alignment with the tooth tip position of the drive gear after disengagement and the inner ring position of the thrust bearing 14 at the male and female rotor support ends. This further improves the lubrication and cooling effect of the drive gear and thrust bearing 14, extends the service life of related components, reduces noise generated by the drive gear and thrust bearing 14 during high-speed rotation, and significantly reduces oil mist generated during injection. More importantly, it allows for the determination of the required oil pump pressure, injection hole diameter, and injection speed based on the different heat generation of related components inside the blower and the amount of lubricating oil needed to remove this heat. By installing oil injectors 1107 with different inner diameters, precise oil spraying and cooling of related components can be achieved, saving lubricating oil usage while providing highly efficient lubrication and cooling effects.

[0105] Hollow positioning pins 17 are fixed at the axial connection points of the male rotor end transition oil passages 110104 and 110204 inside the drive end oil tank 101 and the male rotor end transition oil passages 110104 and 110204 inside the exhaust housing 201, respectively. An axial through hole 17 is provided in the middle of the hollow positioning pin 17. The drive end oil tank 101 and the male rotor end transition oil passage 110104 inside the exhaust housing 201 are connected by a through hole 1701. Holes 1701 are interconnected. The female rotor end transition oil passage 110204 inside the drive end oil tank 101 and the exhaust housing 201 are interconnected through holes 1701. Hollow positioning pins 17 are fixed at the axial connection points of the male rotor end transition oil passage 110104 and the female rotor end transition oil passage 110204 inside the exhaust housing 201 and the male rotor end transition oil passage 110104 and the female rotor end transition oil passage 110204 inside the intake housing 202, respectively. A through hole 1701 is provided in the middle position of 7. The male rotor end transition oil passage 110104 inside the exhaust housing 201 and the intake housing 202 are interconnected through the through hole 1701. The female rotor end transition oil passage 110204 inside the exhaust housing 201 and the intake housing 202 are interconnected through the through hole 1701. The male rotor end transition oil passage 110104 and the female rotor end transition oil passage 110204 inside the intake housing 202 are respectively connected to the male rotor end transition oil passage inside the support end oil tank 102. A hollow positioning pin 17 is fixed at the axial connection of the male rotor transition oil passage 110104 and the female rotor transition oil passage 110204. An axial through hole 1701 is provided in the middle position of the hollow positioning pin 17. The male rotor transition oil passage 110104 inside the intake housing 202 and the support end oil tank 102 are interconnected through the through hole 1701. The female rotor transition oil passage 110204 inside the intake housing 202 and the support end oil tank 102 are interconnected through the through hole 1701.

[0106] The axial positioning function of the hollow positioning pin 17 enables the drive end oil tank 101 and the exhaust housing 201, the exhaust housing 201 and the intake housing 202, and the intake housing 202 and the support end oil tank 102 to be quickly and accurately assembled together. This greatly reduces the workload and intensity of the operator during assembly. At the same time, it can avoid the problem of radial misalignment of the lubricating oil passages between the connected housings after the blower is assembled due to inaccurate axial positioning, which would lead to poor flow of lubricating oil in the lubricating oil passages when the blower is running.

[0107] Sealing rings 23 are fixedly provided on both radial sides of the hollow positioning pin 17 at the axial connection between the drive end oil tank 101 and the exhaust housing 201, the axial connection between the exhaust housing 201 and the intake housing 202, and the axial connection between the intake housing 202 and the support end oil tank 102.

[0108] A detection oil passage 1103 is connected to the lubrication oil passages 110101, 110102, 110103, 110201, 110202, and 110203 of the male rotor drive gear, the female rotor drive end bearing, and the female rotor support end bearing. The detection oil passage 1103 extends to the outer surface of the blower housing 31, and a sealing plug 19 is fixedly installed on the oil passage port of the detection oil passage 1103 on the outer surface of the blower housing 31.

[0109] When it is necessary to test parameters such as lubricating oil temperature, lubricating oil pressure, or lubricating oil cleanliness in the lubricating oil circuits 110101, 110102, 110103, 110201, 110202, and 110203 of the male rotor drive gear lubricating oil circuit, the sealing plug 19 can be opened, and the outer port of the corresponding testing oil circuit 1103 can be connected to a temperature sensor, pressure sensor, or cleanliness instrument to test the lubricating oil in the corresponding lubricating oil circuit. When a fault occurs in a certain place, it can be detected and resolved in time, avoiding the accumulation of faults due to abnormal lubricating oil pressure or temperature in a certain place, which increases the difficulty and cost of maintenance.

[0110] The lubricating oil circuit connector 301 has a locking hole 30104 fixed on the same side end face as the oil inlet channel hole 30101. The external side of the support end oil tank 102 has a threaded hole. The lubricating oil circuit connector 301 and the support end oil tank 102 are locked and fixedly connected by a locking screw 20 passing through the locking hole 30104 and the external threaded hole of the support end oil tank 102. This structural design allows for easy disassembly and assembly of the lubricating oil circuit connector 301. According to actual usage requirements, the low-pressure lubricating oil circuit connector or the high-pressure lubricating oil circuit connector can be replaced. The operation is simple and quick.

[0111] An oil injection filter element 2101 is fixedly installed inside the oil injection channel 21. When lubricating oil is added through the oil injection channel hole 21, the lubricating oil can be initially filtered through the oil injection filter element 2101 to ensure the cleanliness of the lubricating oil and avoid the problem of accelerated wear of internal parts of the blower and excessive noise due to too many impurities in the lubricating oil during the operation of the blower.

[0112] The oil suction channel 22 is located at the bottom of the inner cavity 3105 of the oil tank at the support end and is equipped with an oil suction filter hole 2201. When the oil pump 401 draws oil through the oil suction channel 22, the oil suction filter hole 2201 can effectively filter out impurities and foreign objects mixed in the lubricating oil, ensuring the cleanliness of the lubricating oil.

[0113] The oil suction channel 22 is located at the bottom outer surface of the support end oil tank 102 and is fixedly equipped with a sealing plug 19. When it is necessary to replace the lubricating oil inside the support end oil tank 102, simply open the sealing plug 19 to drain the lubricating oil inside the support end oil tank 102. The operation is simple and quick, increasing work efficiency. Furthermore, since the lubricating oil discharge port on the oil suction channel 22 is located at the bottom of the support end oil tank 102, when draining the lubricating oil, due to the effect of gravity, the lubricating oil and impurities inside the support end oil tank 102 can be completely discharged.

[0114] The lubricating oil circuit connector 301 has a spare channel 30108 inside. The spare channel 30108 is fixedly connected to the first oil inlet channel 30106. The two ends of the spare channel 30108 are fixedly provided with a first channel hole 30112 and a second channel hole 30113. The first channel hole 30112 and the second channel hole 30113 extend to the outer surface of the lubricating oil circuit connector 301, respectively. The ports of the first channel hole 30112 and the second channel hole 30113 located on the outer surface of the lubricating oil circuit connector 301 are fixedly provided with sealing plugs 19. The channel holes of the spare channel 30108 can be connected to corresponding functional devices as needed, which is highly flexible.

[0115] A drive end fixed support 25 is fixedly provided on the outer surface of the drive end oil tank 101, and a support end fixed support 26 is fixedly provided on the outer surface of the support end oil tank 102. The drive end fixed support 25 and the support end fixed support 26 fix the blower housing 31.

[0116] The drive end fixed support 25 and the support end fixed support 26 are respectively provided with mounting holes 2501 and 2601. When installing or disassembling the blower, the locking screw 20 passes through the mounting hole and the installation position to achieve quick positioning installation or disassembly, which is convenient, saves operation time and improves work efficiency.

[0117] An oil return groove 37 is fixedly provided on the inner surface of the drive end oil tank 101 near the male rotor drive gear 10 and the female rotor drive gear 30. An oil return groove 37 is also fixedly provided on the inner surface of the drive end oil tank 101 near the thrust bearing 14 and support bearing 29 on the outer circumference of the male rotor drive end rotating shaft section 502 and the female rotor drive end rotating shaft section 602, respectively. Similarly, an oil return groove 37 is fixedly provided on the inner surface of the support end oil tank 102 near the thrust bearing 14 on the outer circumference of the male rotor support end rotating shaft section 503 and the female rotor support end rotating shaft section 603, respectively. An oil return pipe 36 is fixedly provided on the inner surface of the blower housing 31. Oil pipe 36 passes through the inner surfaces of drive end oil tank 101, exhaust housing 201, intake housing 202, and support end oil tank 102 in sequence. One end of return oil pipe 36 located on the inner surface of support end oil tank is connected to the inner cavity 3105 of support end oil tank. One end of return oil groove 37 away from male rotor drive gear 10, female rotor drive gear 30, thrust bearing 14, and support bearing 29 is connected to return oil pipe 36. Part of the lubricating oil on drive gear, thrust bearing 14, and support bearing 29 flows to return oil pipe 36 through the corresponding return oil groove 37, and then flows back to support end oil tank 102 through return oil pipe 36.

[0118] The entire lubricating oil return process is completed inside the blower housing 31, which avoids the problem of lubricating oil leakage that occurs when existing screw blowers use an external oil return device to complete the lubricating oil return work. Furthermore, by eliminating the external oil return device, the footprint of the entire blower is reduced.

[0119] Furthermore, the entire reflux process can remove the oil mist generated inside the blower housing 31, preventing the oil mist from accumulating inside the blower housing for a long time and causing sediment or impurities, which would affect the normal operation of related components. More importantly, each component inside the blower is provided with an independent oil return groove 37. This structural design can prevent the problem of blocked oil return inside the blower due to poor oil return at one point, further ensuring the smooth flow of lubricating oil inside the blower.

[0120] The axial connection between the drive end oil tank 101 and the exhaust housing 201, the axial connection between the exhaust housing 201 and the intake housing 202, and the axial connection between the intake housing 202 and the support end oil tank 102 are respectively locked and fixed by locking screws 20 with axial threads. While ensuring the sealing between the connected housings, it also facilitates the disassembly, maintenance and daily upkeep of the blower by the staff, improves work efficiency and reduces work intensity.

[0121] Sealing rings 23 are fixedly provided on the outer side of the hollow positioning pin 17 at the axial connection between the drive end oil tank 101 and the exhaust housing 201, the axial connection between the exhaust housing 201 and the intake housing 202, and the axial connection between the intake housing 202 and the support end oil tank 102, respectively. This further enhances the sealing between the connected lubrication oil circuits and prevents lubrication oil leakage between the connected housings.

[0122] A sealing ring 23 is fixed between the outer surface of the oil distribution block 18 and the support end oil tank 102.

[0123] A sealing ring 23 is fixedly provided between the outer surface of the lubrication oil circuit connector 301 and the support end oil tank 102.

[0124] The inner diameter of each oil passage in the lubrication circuit assembly, each oil passage channel in the lubrication circuit connector 301, and each oil passage channel inside the oil distribution block 18 is 12mm ± 1mm. This inner diameter is the optimal size, ensuring the smooth flow of lubricating oil in the lubrication circuit. If the inner diameter is too large, the oil pressure in the oil circuit will be too low, resulting in inadequate lubrication and heat dissipation of the drive gears and bearings inside the blower. If the inner diameter is too small, it will increase the oil mist generated during oil spraying. The oil mist will accumulate inside the blower for a long time, increasing the viscosity of the lubricating oil and raising the oil temperature. This will increase the rotational resistance of the drive gears and bearings, reducing the lubrication and heat dissipation effect of the drive gears and bearings. More importantly, if the inner diameter of the oil passage is too small, it will increase the oil pressure in the oil circuit and increase the impact force during oil spraying. When the oil circuit sprays oil onto the drive gears and bearings, the impact force generated by the lubricating oil will cause a certain degree of damage to the drive gears and bearings, reducing their service life.

[0125] However, the above description is merely a specific embodiment of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of the present invention should still fall within the scope of the claims of the present invention.

Claims

1. A low pressure screw blower multiway lubrication distribution device characterized by: This includes the blower housing, transmission components, and oil supply, lubrication, and heat dissipation components; The blower housing includes a housing assembly and an oil tank assembly. A drive-end oil tank and a support-end oil tank are fixedly provided on both sides of the housing assembly, and the drive-end oil tank and the support-end oil tank together form the oil tank assembly. The oil supply, lubrication and heat dissipation assembly includes a lubrication oil circuit assembly, an oil pump assembly and a lubrication oil circuit connection assembly; The lubrication circuit assembly is built into the blower housing, and the oil pump assembly is fixedly connected to the inner surface of the support end oil tank; The lubricating oil circuit connection assembly and the support end oil tank are fixedly connected to the side of the male rotor. The lubrication circuit assembly, oil pump assembly, and lubrication circuit connection assembly are interconnected. The lubrication circuit assembly includes a male rotor end lubrication circuit and a female rotor end lubrication circuit. The oil pump assembly includes an oil pump with an oil pump suction port. An oil filling passage and an oil suction channel are respectively provided at the top and bottom positions of the outer side of the support end oil tank and extend into the support end oil tank. The oil pump suction port, the oil suction channel, and the inner cavity of the support end oil tank are sequentially connected. The oil pump has an oil pump outlet port. The oil pump suction port and the oil pump outlet port are connected through the internal pipeline of the oil pump. A fourth oil outlet channel is built into the inside of the support end oil tank. One end of the oil pump outlet port and the fourth oil outlet channel are fixedly connected, and the other end of the fourth oil outlet channel extends to the outer surface of the support end oil tank near the male rotor. The lubricating oil circuit connection assembly includes a lubricating oil circuit connection seat and a filter, and the lubricating oil circuit connection seat is fixedly connected to the outside of the support end oil tank near the male rotor. The lubricating oil circuit connector is provided with a filter connector. The filter is fixedly connected to the lubricating oil circuit connector through the filter connector. The outer surface of the lubricating oil circuit connector is provided with an oil inlet channel hole on the side near the support end oil tank. The oil inlet channel hole and the end of the fourth oil outlet channel away from the oil pump outlet hole are fixedly connected. The outer surface of the lubricating oil circuit connector on the side of the filter connector is provided with an oil outlet channel hole. An internal connecting channel of the lubricating oil circuit connector is provided between the oil inlet channel hole and the oil outlet channel hole. The oil inlet channel hole, the oil outlet channel hole and the internal connecting channel of the lubricating oil circuit connector are interconnected. The outer surface of the lubricating oil circuit connector on the side of the filter connector is provided with a return oil channel hole. The oil outlet channel hole and the return oil channel hole are interconnected with the oil inlet hole and the oil outlet hole of the internal filter pipe of the filter, respectively. The material used for the lubrication circuit connector is cast aluminum alloy.

2. A low pressure screw blower multiway lubrication distribution device according to claim 1, characterized in that: The housing assembly includes an intake housing and an exhaust housing. Both the intake housing and the exhaust housing have hollow internal structures. The internal hollow structures of the intake housing and the exhaust housing are combined to form an inner cavity of the housing. The drive end oil tank has a drive end oil tank inner cavity, and the support end oil tank has a support end oil tank inner cavity. An intake pipe is fixedly provided on the upper part of the intake housing, and an intake port is provided on the outer side of the intake pipe. An exhaust pipe is fixedly provided on the upper part of the exhaust housing, and an exhaust port is provided on the outer side of the exhaust pipe. The air inlet pipe and the inner cavity of the air inlet casing are in communication with each other, and the air outlet pipe and the inner cavity of the air outlet casing are in communication with each other; The transmission assembly comprises a male rotor rotating shaft assembly and a female rotor rotating shaft assembly, the male rotor rotating shaft assembly and the female rotor rotating shaft assembly are fixedly arranged along the axial direction inside the blower casing, a male rotor is arranged at the middle position of the male rotor rotating shaft assembly, a male rotor driving end rotating shaft segment and a male rotor supporting end rotating shaft segment are respectively arranged at the two end positions of the male rotor rotating shaft assembly, the male rotor driving end rotating shaft segment penetrates axially to the outside of the driving end oil tank, a female rotor is arranged at the middle position of the female rotor rotating shaft assembly, a female rotor driving end rotating shaft segment and a female rotor supporting end rotating shaft segment are respectively arranged at the two end positions of the female rotor rotating shaft assembly; Spiral blade surfaces are respectively arranged on the male rotor and the female rotor, and the male rotor and the female rotor are rotationally connected through the spiral blade surfaces; The male rotor and the female rotor are in sealing rotational connection with the inner surface of the inner cavity; The outer side rotating shaft segment and the inner side rotating shaft segment of the male rotor driving end rotating shaft segment are respectively in rotational connection with the inner cavity of the driving end oil tank and the inner cavity of the casing, and the outer side rotating shaft segment and the inner side rotating shaft segment of the male rotor supporting end rotating shaft segment are respectively in rotational connection with the inner cavity of the supporting end oil tank and the inner cavity of the casing; The outer side rotating shaft segment and the inner side rotating shaft segment of the female rotor driving end rotating shaft segment are respectively in rotational connection with the inner cavity of the driving end oil tank and the inner cavity of the casing, and the outer side rotating shaft segment and the inner side rotating shaft segment of the female rotor supporting end rotating shaft segment are respectively in rotational connection with the inner cavity of the supporting end oil tank and the inner cavity of the casing; Male rotor driving gears and female rotor driving gears are respectively fixedly arranged on the outer circumferences of the male rotor driving end rotating shaft segment and the female rotor driving end rotating shaft segment; Thrust bearings and supporting bearings are fixedly arranged on the outer circumference of the male rotor driving end rotating shaft segment, and thrust bearings are fixedly arranged on the outer circumference of the male rotor supporting end rotating shaft segment; Thrust bearings and supporting bearings are fixedly arranged on the outer circumference of the female rotor driving end rotating shaft segment, and thrust bearings are fixedly arranged on the outer circumference of the female rotor supporting end rotating shaft segment; The male rotor end lubricating oil path comprises a male rotor driving gear lubricating oil path, a male rotor driving end bearing lubricating oil path, a male rotor supporting end bearing lubricating oil path, and a male rotor end transition oil path, and the female rotor end lubricating oil path comprises a female rotor driving gear lubricating oil path, a female rotor driving end bearing lubricating oil path, a female rotor supporting end bearing lubricating oil path, and a female rotor end transition oil path. ​ The male rotor driving gear lubricating oil path, the male rotor driving end bearing lubricating oil path and the male rotor supporting end bearing lubricating oil path are respectively radially arranged in the interior of the driving end oil tank, the exhaust casing and the supporting end oil tank near the male rotor. The female rotor driving gear lubricating oil path, the female rotor driving end bearing lubricating oil path and the female rotor supporting end bearing lubricating oil path are respectively radially arranged in the interior of the driving end oil tank, the exhaust casing and the supporting end oil tank near the female rotor.

3. A low pressure screw blower multiway lubrication distribution device according to claim 2, characterized in that: The interior of the supporting end oil tank is provided with a transition connection channel in the radial direction.

4. A low pressure screw blower multiway lubrication distribution device according to claim 3, characterized in that: The lubricating oil path connecting seat is a low-pressure lubricating oil path connecting seat, the interior of the lubricating oil path connecting seat is provided with a first oil inlet channel, the oil return channel hole and the first oil inlet channel are in communication with each other, the interior of the lubricating oil path connecting seat is provided with a first transition channel and a first oil outlet channel, one end of the first transition channel and the first oil outlet channel is respectively in communication with the first oil inlet channel, the other end of the first transition channel is fixedly connected with one end of the transition connection channel, the other end of the transition connection channel is fixedly connected with the female rotor end transition oil path in the interior of the supporting end oil tank, and the other end of the first oil outlet channel is fixedly connected with the male rotor end transition oil path in the interior of the supporting end oil tank.

5. A low pressure screw blower multiway lubrication distribution device according to claim 4, characterized in that: The exterior of the supporting end oil tank is fixedly provided with an oil distribution block near one side of the female rotor, the interior of the oil distribution block is provided with a second buffer channel, the interior of the oil distribution block is provided with a second transition channel and a second oil outlet channel, one end of the second transition channel and the second oil outlet channel is respectively in communication with the second buffer channel, the other end of the second transition channel is fixedly connected with one end of the transition connection channel away from the first transition channel, and the other end of the second oil outlet channel is fixedly connected with the female rotor end transition oil path in the interior of the supporting end oil tank. The exterior of the supporting end oil tank is fixedly provided with an oil distribution block near one side of the female rotor, the interior of the oil distribution block is provided with a second buffer channel, the interior of the oil distribution block is provided with a second transition channel and a second oil outlet channel, one end of the second transition channel and the second oil outlet channel is respectively in communication with the second buffer channel, the other end of the second transition channel is fixedly connected with one end of the transition connection channel away from the first transition channel, and the other end of the second oil outlet channel is fixedly connected with the female rotor end transition oil path in the interior of the supporting end oil tank.

6. A low pressure screw blower multiple lubrication distribution device according to claim 2, characterized in that: The lubrication oil circuits of the male rotor drive gear, the male rotor support end bearing, the female rotor drive gear, and the female rotor support end bearing are respectively equipped with oil nozzles fixed at the front ends of the thrust bearings on the outer circumference of the male rotor drive gear, the male rotor support end rotating shaft section, the female rotor drive gear, and the female rotor support end rotating shaft section.

7. A low pressure screw blower multiple lubrication distribution device according to claim 2, characterized in that: Hollow positioning pins are fixed at the axial connection points of the male rotor end transition oil passage and the female rotor end transition oil passage inside the drive end oil tank and the male rotor end transition oil passage and the female rotor end transition oil passage inside the exhaust casing, respectively. An axial through hole is provided in the middle position of the hollow positioning pin. The male rotor end transition oil passage inside the drive end oil tank and the female rotor end transition oil passage inside the exhaust casing are interconnected through the through hole. Hollow positioning pins are fixed at the axial connection points of the male rotor end transition oil passage and the female rotor end transition oil passage inside the exhaust housing and the male rotor end transition oil passage and the female rotor end transition oil passage inside the intake housing, respectively. An axial through hole is provided in the middle position of the hollow positioning pin. The male rotor end transition oil passage inside the exhaust housing and the intake housing are interconnected through the through hole. The female rotor end transition oil passage inside the exhaust housing and the intake housing are interconnected through the through hole. Hollow positioning pins are fixed at the axial connection points of the male rotor end transition oil passage and the female rotor end transition oil passage inside the intake housing and the male rotor end transition oil passage and the female rotor end transition oil passage inside the support end oil tank, respectively. An axial through hole is provided in the middle position of the hollow positioning pin. The male rotor end transition oil passage inside the intake housing and the female rotor end transition oil passage inside the support end oil tank are interconnected through the through hole.

8. A low pressure screw blower multiway lubrication distribution device according to claim 7, characterized in that: Sealing rings are fixedly provided on both radial sides of the hollow positioning pin at the axial connection points of the drive end oil tank and the exhaust housing, the exhaust housing and the intake housing, and the intake housing and the support end oil tank.

9. A low pressure screw blower multiple lubrication distribution device according to claim 2, characterized in that: The lubrication lines for the male rotor drive gear, the male rotor drive end bearing, the male rotor support end bearing, the female rotor drive gear, the female rotor drive end bearing, and the female rotor support end bearing are all connected to a detection oil line. The detection oil line extends to the outer surface of the blower housing, and a sealing plug is fixedly installed at the oil inlet of the detection oil line on the outer surface of the blower housing.

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