Roots blower with double-oil-pump circulating cooling device

Abstract

The utility model provides a Roots blower with a double-oil-pump circulating cooling device, which comprises a Roots blower main body and the double-oil-pump circulating cooling device, the Roots blower main body comprises an oil tank, a driving end wall plate and a non-driving end wall plate, and the double-oil-pump circulating cooling device comprises a first oil pump, a second oil pump and a cooler. The oil tank communicates with the first oil pump and the second oil pump, the first oil pump and the second oil pump are connected in parallel, and the rear ends of the first oil pump and the second oil pump are connected with the driving end oil pipe assembly, the gear end oil pipe assembly and the non-driving end oil pipe assembly correspondingly to lubricate and cool the driving end bearing, the non-driving end bearing, the driving gear and the driven gear correspondingly. The first oil pump and the second oil pump can independently operate to achieve circulating cooling of lubricating oil, when one oil pump breaks down, the other oil pump can be switched to operate in the non-stop state, and long-time stable operation of the air blower is guaranteed. The circulating cooling device can be widely applied to circulating cooling of the roots blower.

Description

TECHNICAL FIELD

[0001] The utility model relates to a roots blower, in particular to a roots blower with double oil pump circulating cooling device. BACKGROUND

[0002] The roots blower is based on the relative motion of two vane rotors in the cylinder, and realizes gas delivery through the formation and compression of sealed chambers.

[0003] During long-time operation of the roots blower, the internal temperature of the roots blower will increase significantly, and the continuous high temperature inside will directly cause damage to key components such as bearings, gears, and sealing rings.

[0004] In order to solve the above problems, most of the current roots blowers are equipped with heat dissipation fans on the outside of the roots blowers to actively cool the roots blowers and reduce the overall temperature of the roots blowers. UTILITY MODEL CONTENTS

[0005] The utility model provides a roots blower with double oil pump circulating cooling device, which is provided with a circulating cooling device, can circulate and cool the lubricating oil in the oil tank, and can cool the internal chamber and internal components efficiently while lubricating the internal components of the roots blower, so as to maintain a proper working temperature inside the roots blower, realize long-time stable operation of the roots blower, and prolong the service life.

[0006] Therefore, the technical scheme of the utility model is a roots blower with double oil pump circulating cooling device, which comprises a roots blower main body and a double oil pump circulating cooling device.

[0007] The oil tank is provided with an oil outlet, an oil pipe is arranged on the outer side port of the oil outlet, the oil outlet is fixedly connected with the oil inlet of the oil pipe, the oil outlet of the oil pipe is provided with a fifth valve and a sixth valve on one side, the oil outlet of the oil pipe is fixedly connected with one side port of the fifth valve and the sixth valve, the other side port of the fifth valve and the sixth valve is fixedly connected with the oil inlet of the first oil pump and the second oil pump, the oil outlet of the first oil pump and the second oil pump is provided with a three-way joint on one side, the three-way joint is provided with a first interface, a second interface and a third interface, the oil outlet of the first oil pump and the second oil pump is fixedly connected with the second interface and the first interface, the third interface is connected with an oil pipe, the other end of the oil pipe is fixedly connected with the oil inlet of the cooler, the oil outlet of the cooler is connected with a four-way joint on one side, the four-way joint is provided with a fourth interface, a fifth interface, a sixth interface and a seventh interface, the oil outlet of the cooler is fixedly connected with the fourth interface, the outer side of the fifth interface, the sixth interface and the seventh interface is respectively connected with a driving end oil pipe assembly, a gear end oil pipe assembly and a non-driving end oil pipe assembly;

[0008] The driving end oil pipe assembly is fixedly connected with the outside of the driving end wall plate, the gear end oil pipe assembly and the non-driving end oil pipe assembly are respectively fixedly connected with the outside of the non-driving end wall plate, the other end of the driving end oil pipe assembly is fixedly connected with one end of the lubricating oil way on the driving end wall plate, the other end of the lubricating oil way is connected with an oil pipe, the other side of the oil pipe is respectively aligned with the bearing positions of the driving end of the driving impeller and the driven impeller inside the Roots blower, so that the bearings of the driving end are precisely sprayed and lubricated and cooled;

[0009] The other end of the gear end oil pipe assembly is fixedly connected with one end of the lubricating oil way on the non-driving end wall plate, the other end of the lubricating oil way is connected with an oil pipe, the other side of the oil pipe is respectively aligned with the positions of the driving gear and the driven gear inside the Roots blower, so that the driving gear and the driven gear are precisely sprayed and lubricated and cooled;

[0010] The other end of the non-driving end oil pipe assembly is fixedly connected with one end of the lubricating oil way on the non-driving end wall plate, the other end of the lubricating oil way is connected with an oil pipe, the other side of the oil pipe is respectively aligned with the bearing positions of the non-driving end of the driving impeller and the driven impeller inside the Roots blower, so that the bearings of the non-driving end are precisely sprayed and lubricated and cooled.

[0011] Preferably, the oil outlet of the oil tank is provided with a filter between the oil outlet and the oil pipe on the side of the oil outlet, the filter is fixedly connected to the outside of the oil tank, the oil inlet of the filter is fixedly connected to the oil outlet of the oil tank, the oil outlet of the filter is fixedly connected to the oil inlet of the oil pipe, the oil outlet side of the oil pipe is provided with a pressure transmitter, the oil outlet of the oil pipe is fixedly connected to the oil inlet of the pressure transmitter, the oil outlet side of the pressure transmitter is provided with a four-way joint, the oil outlet of the pressure transmitter is fixedly connected to the fourth interface of the four-way joint, the fifth interface and the sixth interface of the four-way joint are fixedly connected with the fifth valve and the sixth valve respectively, and the seventh interface of the four-way joint is fixedly provided with the seventh valve.

[0012] Preferably, the oil outlets of the first oil pump and the second oil pump are respectively provided with first and second one-way valves, the oil outlets of the first and second oil pumps are fixedly connected to the oil inlets of the first and second one-way valves respectively, the first and second one-way valves are fixedly connected to the second interface and the first interface of the three-way joint on the side of the oil outlets of the first and second oil pumps respectively, the third interface is fixedly connected to one end of the oil pipe, and the other end of the oil pipe is provided with a four-way joint between the other end of the oil pipe and the cooler, the oil pipe is fixedly connected to the fourth interface of the four-way joint, the fifth interface is fixedly connected with the first valve, the other end of the first valve is fixedly connected with the oil pipe, the other end of the oil pipe is fixedly connected to the oil inlet of the oil tank, the eighth valve is fixedly connected to the sixth interface, and the seventh interface is fixedly connected to the oil inlet of the cooler.

[0013] Preferably, the drive end oil pipe assembly comprises a drive end fourth oil pipe, one end of the drive end fourth oil pipe is fixedly connected to the fifth interface of the four-way joint on the side of the oil outlet of the cooler, the other end of the drive end fourth oil pipe is connected with a third valve, the other end of the third valve is connected with a drive end filter, the other end of the drive end filter is provided with a three-way joint, the drive end filter is fixedly connected to the first interface of the three-way joint, the second interface and the third interface of the three-way joint are respectively provided with flow indicators on the sides of the second interface and the third interface, the oil inlets of the flow indicators are fixedly connected to the second interface and the third interface respectively, the oil outlets of the two flow indicators are respectively connected with a drive end first oil pipe and a drive end second oil pipe, the lubricating oil paths on the drive end wall plate comprise first and second lubricating oil paths, the other ends of the drive end first and second oil pipes are fixedly connected to one end of the first and second lubricating oil paths respectively, the other ends of the first and second lubricating oil paths are respectively connected with oil pipes, the other sides of the two oil pipes are respectively aligned with the bearing positions of the drive end of the driving impeller and the driven impeller inside the Roots blower, so as to realize precise oil injection lubrication and cooling of the bearings of the drive end.

[0014] Preferably, the gear end oil pipe assembly comprises a gear end first oil pipe, one end of the gear end first oil pipe is fixedly connected with the sixth interface on the four-way joint on one side of the oil outlet of the cooler, the other end of the gear end first oil pipe is provided with a flow indicator, the gear end first oil pipe is fixedly connected with the oil inlet of the flow indicator, one side of the oil outlet of the flow indicator is provided with a three-way joint, the oil outlet of the flow indicator is fixedly connected with the first interface of the three-way joint, the second interface of the three-way joint is connected with a fourth valve, the other end of the fourth valve is connected with a pressure gauge, the lubricating oil path on the non-driving end wall plate comprises a fifth lubricating oil path, the third interface of the three-way joint is fixedly connected with one end of the fifth lubricating oil path, the other end of the fifth lubricating oil path is connected with an oil pipe, the other side of the oil pipe is respectively aligned with the positions of the driving gear and the driven gear inside the Roots blower, thereby realizing precise oil injection lubrication and cooling of the driving gear and the driven gear.

[0015] Preferably, the non-driving end oil pipe assembly comprises a non-driving end fourth oil pipe, one end of the non-driving end fourth oil pipe is fixedly connected with the seventh interface on the four-way joint on one side of the oil outlet of the cooler, the other end of the non-driving end fourth oil pipe is connected with a second valve, the other end of the second valve is connected with a non-driving end filter, the other end of the non-driving end filter is provided with a three-way joint, the non-driving end filter is fixedly connected with the first interface of the three-way joint, one side of the second interface and the third interface of the three-way joint is respectively provided with a flow indicator, the second interface and the third interface are respectively fixedly connected with the oil inlets of the flow indicators, the oil outlets of the two flow indicators are respectively connected with a non-driving end first oil pipe and a non-driving end second oil pipe, the lubricating oil path on the non-driving end wall plate further comprises a third lubricating oil path and a fourth lubricating oil path, the non-driving end first oil pipe and the non-driving end second oil pipe are respectively fixedly connected with one end of the third lubricating oil path and the fourth lubricating oil path, the other end of the third lubricating oil path and the fourth lubricating oil path is respectively connected with an oil pipe, the other side of the two oil pipes is respectively aligned with the bearing positions of the non-driving end of the driving impeller and the driven impeller inside the Roots blower, thereby realizing precise oil injection lubrication and cooling of the bearings of the non-driving end.

[0016] Preferably, the cooler is fixedly connected with the outside of the oil tank through a fixed support;

[0017] The position of the four-way joint on one side of the oil inlet of the cooler is fixed on the outside of the oil tank through a fixed support;

[0018] The driving end oil pipe assembly is fixedly connected with the outside of the driving end wall plate through a fixed support;

[0019] The gear end oil pipe assembly and the non-driving end oil pipe assembly are respectively fixedly connected with the outside of the non-driving end wall plate through fixed supports.

[0020] Preferably, the oil pipe on the side of the fifth lubricating oil path is T-shaped, and a plurality of oil outlet holes are arranged on the T-shaped oil pipe away from the end of the fifth lubricating oil path, the plurality of oil outlet holes are arranged in a "one" shape, and are respectively aligned with the driving gear and the driven gear, so that precise oil injection lubrication and cooling of the driving gear and the driven gear can be realized.

[0021] Preferably, the oil pump fixing frame is arranged on one side of the first oil pump and the second oil pump, and the first oil pump and the second oil pump are fixed at the upper end position of the oil pump fixing frame.

[0022] The utility model discloses the beneficial effect is:

[0023] 1. By assembling the first oil pump and the second oil pump on the roots blower, the first oil pump and the second oil pump can independently run to realize the circulation cooling of lubricating oil, when one of the oil pumps fails, it can be switched to the operation of another oil pump under the condition of not stopping, to ensure the long time stable operation of the blower.

[0024] 2. By setting the independent driving end first oil pipe and driving end second oil pipe, and independent first lubricating oil path and second lubricating oil path, and the other end of the driving end first oil pipe and the driving end second oil pipe is fixedly connected with one end of the first lubricating oil path and the second lubricating oil path respectively, the other end of the first lubricating oil path and the second lubricating oil path is connected with the oil pipe respectively, the other side of the two oil pipes is respectively aligned with the bearing position of the driving end of the driving impeller and the driven impeller in the roots blower, the independent precise oil injection lubrication and cooling of the bearing of the driving end are realized, and the effect is obvious.

[0025] 3. By setting the independent non-driving end first oil pipe and non-driving end second oil pipe, and independent third lubricating oil path and fourth lubricating oil path, the non-driving end first oil pipe and the non-driving end second oil pipe are fixedly connected with one end of the third lubricating oil path and the fourth lubricating oil path respectively, the other end of the third lubricating oil path and the fourth lubricating oil path is connected with the oil pipe respectively, the other side of the two oil pipes is respectively aligned with the bearing position of the non-driving end of the driving impeller and the driven impeller in the roots blower, the independent precise oil injection lubrication and cooling of the bearing of the non-driving end are realized, and the effect is obvious.

[0026] 4. In order to improve the effect of lubricating and cooling the driving gear and the driven gear in the roots blower, the shape of the oil pipe on the side of the fifth lubricating oil path is T-shaped, a plurality of oil outlet holes are arranged on the T-shaped oil pipe away from the end of the fifth lubricating oil path, the plurality of oil outlet holes are arranged in a "one" shape, and are respectively aligned with the driving gear and the driven gear, so that precise oil injection lubrication and cooling of the driving gear and the driven gear can be realized.

[0027] 5. By setting the first valve, in the circulating cooling process, if the pressure transmitter or pressure gauge shows that the pressure value is too high, at this time, slowly open the first valve, a small part of lubricating oil in the oil pipe will enter the inside of the oil tank in turn through the first valve, oil pipe, when the pressure value of the pressure transmitter or pressure gauge is reduced to the normal pressure value, stop operating the first valve, finally complete the pressure relief adjustment operation, ensure that the lubricating oil transmission maintains the standard pressure range, the operation is simple and fast, and real-time adjustment can be achieved, and the effect is obvious. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is the complete structure and circulating cooling path schematic diagram of the utility model;

[0029] Figure 2 is Figure 1 schematic diagram of A in the middle;

[0030] Figure 3 is Figure 1 enlarged view of B in the middle;

[0031] Figure 4 is Figure 1 enlarged view of C in the middle;

[0032] Figure 5 is Figure 1 enlarged view of D in the middle;

[0033] Figure 6 is the three-way joint structure schematic diagram in the utility model;

[0034] Figure 7 is the four-way joint structure schematic diagram in the utility model.

[0035] Symbol explanation in the drawing:

[0036] 1. oil tank; 101. oil tank oil outlet; 2. filter; 3. oil pipe; 4. pressure transmitter; 5. first oil pump; 6. second oil pump; 7. first valve; 8. cooler; 9. pressure gauge; 10. second valve; 11. third valve; 12. driving end oil pipe assembly; 1201. driving end filter; 1202. driving end first oil pipe; 1203. driving end second oil pipe; 1205. driving end fourth oil pipe; 13. non-driving end oil pipe assembly; 1301. non-driving end filter; 1302. non-driving end first oil pipe; 1303. non-driving end second oil pipe; 1304. non-driving end third oil pipe; 1305. non-driving end fourth oil pipe; 14. gear end oil pipe assembly; 1401. gear end first oil pipe; 15. driving end wallboard; 1501. first lubricating oil path; 1502. second lubricating oil path; 16. non-driving end wallboard; 1601. third lubricating oil path; 1602. fourth lubricating oil path; 1603. fifth lubricating oil path; 17. fixed support; 18. flow indicator; 19. fourth valve; 20. fifth valve; 21. sixth valve; 22. three-way joint; 2201. first interface; 2202. second interface; 2203. third interface; 23. four-way joint; 2301. fourth interface; 2302. fifth interface; 2303. sixth interface; 2304. seventh interface; 24. seventh valve; 25. eighth valve; 26. oil pump fixing bracket; 27. first check valve; 28. second check valve. DETAILED DESCRIPTION

[0037] The utility model will be further described below in combination with the embodiment.

[0038] Through Figures 1-7 It can be seen that the Roots blower with double oil pump circulating cooling device, including Roots blower main part and double oil pump circulating cooling device, Roots blower main part includes oil tank 1, driving end wallboard 15, non-driving end wallboard 16, double oil pump circulating cooling device includes first oil pump 5, second oil pump 6, cooler 8, cooler 8 is fixedly connected with the outside of oil tank 1, and the lubricating oil path is respectively arranged on driving end wallboard 15 and non-driving end wallboard 16.

[0039] The oil tank 1 is provided with an oil outlet 101, and an oil pipe 3 is arranged on the outer side port of the oil outlet 101. The oil outlet 101 is fixedly connected with the oil inlet of the oil pipe 3. The oil outlet of the oil pipe 3 is provided with a fifth valve 20 and a sixth valve 21 on one side. The oil outlet of the oil pipe 3 is fixedly connected with one side port of the fifth valve 20 and the sixth valve 21. The other side port of the fifth valve 20 and the sixth valve 21 is fixedly connected with the oil inlet of the first oil pump 5 and the second oil pump 6. The opening and closing of the fifth valve 20 and the sixth valve 21 realizes the switching operation between the first oil pump 5 and the second oil pump 6. The oil outlet of the first oil pump 5 and the second oil pump 6 is provided with a three-way joint 22. The three-way joint 22 is provided with a first interface 2201, a second interface 2202 and a third interface 2203. The oil outlet of the first oil pump 5 and the second oil pump 6 is fixedly connected with the second interface 2202 and the first interface 2201. The third interface 2203 is connected with the oil pipe 3. The other end of the oil pipe 3 is fixedly connected with the oil inlet of the cooler 8. The oil outlet of the cooler 8 is connected with a four-way joint 23 on one side. The four-way joint 23 is provided with a fourth interface 2301, a fifth interface 2302, a sixth interface 2303 and a seventh interface 2304. The oil outlet of the cooler 8 is fixedly connected with the fourth interface 2301. The outer side of the fifth interface 2302, the sixth interface 2303 and the seventh interface 2304 is respectively connected with the driving end oil pipe assembly 12, the gear end oil pipe assembly 14 and the non-driving end oil pipe assembly 13. The cooler 8 can rapidly cool the lubricating oil.

[0040] The driving end oil pipe assembly 12 is fixedly connected with the outside of the driving end wall plate 15. The gear end oil pipe assembly 14 and the non-driving end oil pipe assembly 13 are respectively fixedly connected with the outside of the non-driving end wall plate 16. The other end of the driving end oil pipe assembly 12 is fixedly connected with one end of the lubricating oil path on the driving end wall plate 15. The other end of the lubricating oil path is connected with the oil pipe 3. The other side of the oil pipe 3 is respectively aligned with the bearing positions of the driving end of the driving impeller and the driven impeller inside the Roots blower, so as to realize the precise oil injection lubrication and cooling of the bearings of the driving end. The other end of the gear end oil pipe assembly 14 is fixedly connected with one end of the lubricating oil path on one side of the non-driving end wall plate 16. The other end of the lubricating oil path is connected with the oil pipe 3. The other side of the oil pipe 3 is respectively aligned with the positions of the driving gear and the driven gear inside the Roots blower, so as to realize the precise oil injection lubrication and cooling of the driving gear and the driven gear. The other end of the non-driving end oil pipe assembly 13 is fixedly connected with one end of the lubricating oil path on the other side of the non-driving end wall plate 16. The other end of the lubricating oil path is connected with the oil pipe 3. The other side of the oil pipe 3 is respectively aligned with the bearing positions of the non-driving end of the driving impeller and the driven impeller inside the Roots blower, so as to realize the precise oil injection lubrication and cooling of the bearings of the non-driving end.

[0041] In order to ensure the cleanliness of the lubricating oil circulation, the following embodiments are adopted:

[0042] The oil tank 1 is provided with a filter 2 between the oil outlet 101 and the oil pipe 3 on the side of the oil outlet 101. The filter 2 is fixedly connected to the outside of the oil tank 1. The oil inlet of the filter 2 is fixedly connected to the oil outlet 101 of the oil tank 1. The oil outlet of the filter 2 is fixedly connected to the oil inlet of the oil pipe 3.

[0043] In this embodiment, the filter 2 filters the impurities in the lubricating oil.

[0044] In order to realize real-time remote monitoring, the following embodiment is adopted:

[0045] The oil pipe 3 on the side of the oil outlet of the filter 2 is provided with a pressure transmitter 4. The oil outlet of the oil pipe 3 is fixedly connected to the oil inlet of the pressure transmitter 4. The oil outlet of the pressure transmitter 4 is provided with a four-way joint 23. The oil outlet of the pressure transmitter 4 is fixedly connected to the fourth interface 2301 of the four-way joint 23. The fifth interface 2302 and the sixth interface 2303 of the four-way joint 23 are respectively fixedly connected to the fifth valve 20 and the sixth valve 21. The seventh valve 24 is fixedly arranged on the seventh interface 2304 of the four-way joint 23.

[0046] In this embodiment, the pressure transmitter 4 is installed to realize the conversion between the physical pressure and the standard electrical signal. The pressure value of the lubricating oil in the oil pipe can be viewed in real time. Problems can be found and handled in time. The pressure transmitter 4 can be transmitted through a wire or wirelessly to realize remote monitoring. The seventh valve 24 can be provided with a detection instrument according to actual needs.

[0047] The outlet of the first oil pump 5 and the second oil pump 6 is respectively provided with a first check valve 27 and a second check valve 28, the outlet of the first oil pump 5 and the second oil pump 6 is respectively fixedly connected with the inlet of the first check valve 27 and the second check valve 28, the first check valve 27 and the second check valve 28 are respectively fixedly connected with the second interface 2202 and the first interface 2201 on the three-way joint 22 on one side of the outlet of the first oil pump 5 and the second oil pump 6, the first check valve 27 and the second check valve 28 can prevent the backflow of lubricating oil, the third interface 2203 is fixedly connected with one end of the oil pipe 3, the other end of the oil pipe 3 is provided with a four-way joint 23 between the cooler 8, the oil pipe 3 is fixedly connected with the fourth interface 2301 of the four-way joint 23, the fifth interface 2302 is fixedly connected with the first valve 7, the other end of the first valve 7 is fixedly connected with the oil pipe 3, the other end of the oil pipe 3 is fixedly connected with the inlet of the oil tank 1, in the circulating cooling process, if the pressure transmitter 4 or the pressure gauge 9 shows that the pressure value is too high, at this time, the first valve 7 is slowly opened, a small part of lubricating oil in the oil pipe will enter the inside of the oil tank 1 through the first valve 7 and the oil pipe 3 in turn, when the pressure value of the pressure transmitter 4 or the pressure gauge 9 is reduced to the normal pressure value, the operation of the first valve 7 is stopped, and finally the pressure relief adjustment operation is completed, so that the standard pressure range is maintained during the transmission of lubricating oil, the operation is simple and fast, and real-time adjustment can be achieved, and the effect is obvious.

[0048] In order to improve the application range and reduce the limitation of application, the following embodiments are adopted:

[0049] The sixth interface 2303 is fixedly connected with the eighth valve 25, the other end of the eighth valve 25 can be connected with corresponding detection devices according to actual needs, such as temperature detection device, flow rate detection device, pressure detection device, purity detection device and the like, or other pipelines can be connected according to actual needs.

[0050] The seventh interface 2304 is fixedly connected with the inlet of the cooler 8.

[0051] In order to realize independent and accurate lubrication and cooling of the bearings of the driving end of the driving impeller and the driven impeller in the Roots blower, the following embodiments are adopted:

[0052] The driving end oil pipe assembly 12 comprises a driving end fourth oil pipe 1205, one end of the driving end fourth oil pipe 1205 is fixedly connected with the fifth interface 2302 on the four-way joint 23 on the oil outlet side of the cooler 8, the other end of the driving end fourth oil pipe 1205 is connected with the third valve 11, the other end of the third valve 11 is connected with the driving end filter 1201, the driving end filter 1201 filters again before the lubricating oil enters the driving end wallboard 15, ensures the cleanliness of the lubricating oil entering the driving end wallboard 15, avoids that impurities are mixed in the lubricating oil, causes abrasion to related parts, the other end of the driving end filter 1201 is provided with the three-way joint 22, the driving end filter 1201 is fixedly connected with the first interface 2201 of the three-way joint 22, the second interface 2202 and the third interface 2203 of the three-way joint 22 are respectively provided with the flow indicator 18 on one side, the flow indicator 18 can view the flow state of the lubricating oil in real time, when the lubricating oil flows too slowly or the like, the flow indicator 18 can be found and handled in the first time, avoids that the security risk occurs, the second interface 2202 and the third interface 2203 are respectively fixedly connected with the oil inlet of the flow indicator 18, the oil outlets of the two flow indicators 18 are respectively connected with the driving end first oil pipe 1202 and the driving end second oil pipe 1203, the lubricating oil path on the driving end wallboard 15 comprises a first lubricating oil path 1501 and a second lubricating oil path 1502, the other ends of the driving end first oil pipe 1202 and the driving end second oil pipe 1203 are respectively fixedly connected with one end of the first lubricating oil path 1501 and the second lubricating oil path 1502, the other ends of the first lubricating oil path 1501 and the second lubricating oil path 1502 are respectively connected with the oil pipe 3, the other sides of the two oil pipes 3 are respectively aligned with the bearing positions of the driving end of the driving vane and the driven vane inside the Roots blower, independent precise oil injection lubrication and cooling of the bearings of the driving end are realized, and the effect is obvious.

[0053] In order to realize independent precise lubrication and cooling of the driving gear and the driven gear inside the Roots blower, the following embodiments are adopted:

[0054] The gear end oil pipe assembly 14 comprises a gear end first oil pipe 1401, one end of the gear end first oil pipe 1401 is fixedly connected with the sixth interface 2303 on the four-way joint 23 on one side of the oil outlet of the cooler 8, the other end of the gear end first oil pipe 1401 is provided with the flow indicator 18, the gear end first oil pipe 1401 is fixedly connected with the oil inlet of the flow indicator 18, one side of the oil outlet of the flow indicator 18 is provided with the three-way joint 22, the oil outlet of the flow indicator 18 is fixedly connected with the first interface 2201 of the three-way joint 22, the second interface 2202 of the three-way joint 22 is connected with the fourth valve 19, the other end of the fourth valve 19 is connected with the pressure gauge 9, the pressure value of the lubricating oil in the pipe can be viewed in real time through the pressure gauge 9, the lubricating oil path on the non-driving end wall plate 16 comprises a fifth lubricating oil path 1603, the third interface 2203 of the three-way joint 22 is fixedly connected with one end of the fifth lubricating oil path 1603, the other end of the fifth lubricating oil path 1603 is connected with the oil pipe 3, the other side of the oil pipe 3 is respectively aligned with the driving gear and the driven gear positions inside the Roots blower, independent and accurate oil injection lubrication and cooling of the driving gear and the driven gear are realized, and the effect is obvious.

[0055] In order to realize independent and accurate oil injection lubrication and cooling of the bearings of the non-driving end of the driving impeller and the driven impeller inside the Roots blower, the following embodiments are adopted:

[0056] The non-driving end oil pipe assembly 13 comprises a non-driving end fourth oil pipe 1305, one end of the non-driving end fourth oil pipe 1305 is fixedly connected with the seventh interface 2304 on the four-way joint 23 on one side of the oil outlet of the cooler 8, the other end of the non-driving end fourth oil pipe 1305 is connected with the second valve 10, the other end of the second valve 10 is connected with the non-driving end filter 1301, the non-driving end filter 1301 is provided with the three-way joint 22, the non-driving end filter 1301 is fixedly connected with the first interface 2201 of the three-way joint 22, one side of the second interface 2202 and the third interface 2203 of the three-way joint 22 is respectively provided with the flow indicator 18, the second interface 2202 and the third interface 2203 are respectively fixedly connected with the oil inlets of the flow indicators 18, the oil outlets of the two flow indicators 18 are respectively connected with the non-driving end first oil pipe 1302 and the non-driving end second oil pipe 1303, the lubricating oil path on the non-driving end wall plate 16 further comprises a third lubricating oil path 1601 and a fourth lubricating oil path 1602, the non-driving end first oil pipe 1302 and the non-driving end second oil pipe 1303 are respectively fixedly connected with one end of the third lubricating oil path 1601 and the fourth lubricating oil path 1602, the other end of the third lubricating oil path 1601 and the fourth lubricating oil path 1602 is respectively connected with the oil pipe 3, the other side of the two oil pipes 3 is respectively aligned with the bearing positions of the non-driving end of the driving impeller and the driven impeller inside the Roots blower, independent and accurate oil injection lubrication and cooling of the bearings of the non-driving end are realized, and the effect is obvious.

[0057] In order to increase the compactness of the overall structure of the Roots blower, improve the convenience of maintenance, and make it applicable to different working conditions, the following embodiment is adopted:

[0058] The cooler 8 is fixedly connected to the outside of the oil tank 1 through the fixing support 17, the four-way joint 23 at the oil inlet side of the cooler 8 is fixed to the outside of the oil tank 1 through the fixing support 17, the driving end oil pipe assembly 12 is fixedly connected to the outside of the driving end wall plate 15 through the fixing support 17, and the gear end oil pipe assembly 14 and the non-driving end oil pipe assembly 13 are respectively fixedly connected to the outside of the non-driving end wall plate 16 through the fixing support 17.

[0059] In the embodiment, the related components of the circulating cooling are respectively installed on the outside of the blower through the fixing support 17, the integrated structure layout of the blower as a whole is realized, the overall size of the blower is reduced, and the blower can be applied to different working conditions, meanwhile, since the related components of the circulating cooling are integrated on the outside of the blower, the internal circulation integrated cooling of the lubricating oil can be realized, the complex cooling pipeline and cooling device need not be externally connected, and the occupied area is reduced.

[0060] In order to improve the lubricating and cooling effect of the driving gear and the driven gear inside the Roots blower, the following embodiment is adopted:

[0061] The oil pipe 3 at one side of the fifth lubricating oil path 1603 is in a T shape, a plurality of oil outlet holes are formed on the T-shaped oil pipe 3 away from the fifth lubricating oil path 1603, the plurality of oil outlet holes are arranged in a “-” shape and are respectively aligned with the driving gear and the driven gear, and the driving gear and the driven gear are respectively realized precise oil injection lubrication and cooling.

[0062] In the utility model, the size of the oil pipe 3 is 22mmx3.5mm, which can satisfy the smoothness of the lubricating oil flow.

[0063] The bottom end of the first oil pump 5 and the second oil pump 6 is provided with an oil pump fixing frame 26, the first oil pump 5 and the second oil pump 6 are fixed at the upper end position of the oil pump fixing frame 26, the first oil pump 5 and the second oil pump 6 can be integrally moved and turned over, and the problem that the pipeline between the first oil pump 5 and the second oil pump 6 is dislocated and damaged due to the separate movement of the first oil pump 5 or the second oil pump 6 is avoided.

[0064] A method for circulating cooling by the above-mentioned Roots blower with a double-oil-pump circulating cooling device, comprising the following steps:

[0065] Step (1): the fifth valve 20, the second valve 10 and the fourth valve 19 are respectively opened, and the sixth valve 21, the eighth valve 25 and the first valve 7 are respectively closed.

[0066] Step (2): Start the Roots blower and the first oil pump 5, and the Roots blower and the first oil pump 5 are in the running state respectively.

[0067] Step (3): The first oil pump 5 extracts the lubricating oil in the oil tank 1, and the lubricating oil filtered by the filter 2 enters the inside of the cooler 8 through the oil pipe 3, the pressure transmitter 4, the oil passage in the first oil pump 5, the first one-way valve 27 and the oil inlet of the cooler 8 respectively, and the cooler 8 cools the lubricating oil inside.

[0068] Among them, the flow indicator 18 can be used to view the lubricating oil flow state in real time, and the pressure transmitter 4 can be used to monitor the pressure state of the lubricating oil in real time.

[0069] Step (4): The cooled lubricating oil enters the inside of the driving end fourth oil pipe 1205, the gear end first oil pipe 1401 and the non-driving end fourth oil pipe 1305 respectively through the oil outlet of the cooler 8 and the four-way joint 23 on the side of the oil outlet.

[0070] Step (5): The lubricating oil entering the driving end fourth oil pipe 1205 inside passes through the third valve 11, the driving end filter 1201, the three-way joint 22 and the flow indicator 18 on both sides of the three-way joint 22 respectively, and enters the inside of the driving end first oil pipe 1202 and the driving end second oil pipe 1203, and then the lubricating oil is sprayed outwards through the first lubricating oil passage 1501 and the oil pipe 3 on the side of the first lubricating oil passage 1501 and the first lubricating oil passage 1501 respectively, since the other side of the two oil pipes 3 is respectively aligned with the bearing position of the driving end of the driving impeller and the driven impeller inside the Roots blower, so that precise oil injection lubrication and cooling of the two bearings of the driving end can be realized.

[0071] Step (6): The lubricating oil entering the gear end first oil pipe 1401 inside, a part of which passes through the flow indicator 18, the three-way joint 22, the fourth valve 19 and enters the inside of the pressure gauge 9, and the pressure value of the lubricating oil in the pipe is detected in real time by the pressure gauge 9, and the other part of the lubricating oil passes through the flow indicator 18, the three-way joint 22, the fifth lubricating oil passage 1603 and the oil pipe 3 on the side of the fifth lubricating oil passage 1603 to be sprayed outwards, since the other side of the oil pipe 3 is respectively aligned with the driving gear and the driven gear position inside the Roots blower, so that precise oil injection lubrication and cooling of the driving gear and the driven gear can be realized respectively.

[0072] Step (7): The lubricating oil entering into the fourth oil pipe 1305 of the non-driving end, in turn, passes through the second valve 10, the non-driving end filter 1301, the tee joint 22 and the flow indicator 18 on both sides of the tee joint 22, and enters into the interiors of the non-driving end first oil pipe 1302 and the non-driving end second oil pipe 1303, respectively, and then the lubricating oil is sprayed outwards through the third lubricating oil path 1601 and the fourth lubricating oil path 1602 and the oil pipes 3 on one side of the third lubricating oil path 1601 and the fourth lubricating oil path 1602, and since the other sides of the two oil pipes 3 are respectively aligned with the bearing positions of the non-driving end of the driving impeller and the driven impeller inside the Roots blower, the precise oiling and lubrication and cooling of the two bearings of the non-driving end can be realized.

[0073] Step (8): The lubricating oil splashed onto the two gears and the four bearings will flow back to the oil tank 1 under the action of gravity, and the single lubrication and cooling operation of the gears, bearings and other related components inside the Roots blower is completed.

[0074] Step (9): Steps (3) to (8) are cycled to realize the continuous cycle lubrication and cooling operation of the gears, bearings and other related components inside the Roots blower.

[0075] In the cycle cooling process, if the pressure transmitter 4 or the pressure gauge 9 shows that the pressure value is too high, at this time, the first valve 7 is slowly opened, and a small part of the lubricating oil in the oil pipe will enter the interior of the oil tank 1 in turn through the first valve 7 and the oil pipe 3, when the pressure value of the pressure transmitter 4 or the pressure gauge 9 is reduced to the normal pressure value, the operation of the first valve 7 is stopped, and finally the pressure relief adjustment operation is completed, which ensures that the standard pressure range is maintained during the transmission of the lubricating oil, the operation is simple and fast, and real-time adjustment can be achieved, and the effect is obvious.

[0076] In the cycle cooling process, when the pressure value of the pressure transmitter 4 is lower than the set pressure value, it indicates that the first oil pump 5 has failed, at this time, the second oil pump 6 is started, the sixth valve 21 is opened, the fifth valve 20 is closed, and the second oil pump 6 is switched to normal operation, the lubricating oil filtered by the filter 2 is switched to enter the interior of the cooler 8 through the oil pipe 3, the pressure transmitter 4, the oil path channel in the second oil pump 6, the second one-way valve 28 and the oil inlet of the cooler 8, respectively, and the normal cycle cooling operation is restored.

[0077] During the operation of the second oil pump 6, the lubricating oil cannot enter the interior of the first oil pump 5 under the one-way conduction of the first one-way valve 27, and since the fifth valve 20 is in the closed state, the first oil pump 5 can be repaired and replaced at this time, without affecting the normal cycle lubrication and cooling work of the blower.

[0078] When the pressure value of the pressure transmitter 4 is still lower than the set pressure value after switching to the second oil pump 6 operation, it indicates that there is oil leakage in the pipeline, and the Roots blower and the second oil pump 6 need to be stopped for pipeline maintenance.

[0079] When the pressure transmitter 4 and the pressure gauge 9 are both lower than the set pressure value in the circulating cooling process, it is necessary to check whether the filter 2 is blocked on the basis of pipeline maintenance.

[0080] The Roots blower with the double-oil-pump circulating cooling device is provided with the first oil pump 5 and the second oil pump 6, both of which can independently operate to realize the circulating cooling of the lubricating oil. When one of the oil pumps fails, the Roots blower can be switched to the other oil pump operation without stopping, so as to ensure the long-time stable operation of the Roots blower.

[0081] The above is only a specific embodiment of the utility model, and cannot limit the scope of the utility model. The replacement of equivalent components or equivalent changes and modifications made within the scope of the utility model patent protection shall still fall within the scope of the utility model claims.

Claims

1. A Roots blower with dual oil pump circulation cooling device, characterized in that: The application relates to a Roots blower body and a double-oil-pump circulating cooling device, wherein the Roots blower body comprises an oil tank, a driving end wall plate and a non-driving end wall plate; the double-oil-pump circulating cooling device comprises a first oil pump, a second oil pump and a cooler; the cooler is fixedly connected to the outside of the oil tank; and lubricating oil channels are arranged on the driving end wall plate and the non-driving end wall plate. An oil outlet is arranged on the oil tank, an oil pipe is arranged on the outside of the oil outlet, the oil outlet is fixedly connected to the oil inlet of the oil pipe, fifth and sixth valves are arranged on one side of the oil outlet of the oil pipe, the oil outlet of the oil pipe is fixedly connected to one side of the fifth and sixth valves, the other side of the fifth and sixth valves is fixedly connected to the oil inlets of the first and second oil pumps, a three-way joint is arranged on one side of the oil outlets of the first and second oil pumps, the three-way joint is provided with a first interface, a second interface and a third interface, the oil outlets of the first and second oil pumps are fixedly connected to the second and first interfaces respectively, an oil pipe is connected to the third interface, the other end of the oil pipe is fixedly connected to the oil inlet of the cooler, a four-way joint is arranged on one side of the oil outlet of the cooler, the four-way joint is provided with a fourth interface, a fifth interface, a sixth interface and a seventh interface, the oil outlet of the cooler is fixedly connected to the fourth interface, the fifth, sixth and seventh interfaces are respectively connected to a driving end oil pipe assembly, a gear end oil pipe assembly and a non-driving end oil pipe assembly. The driving end oil pipe assembly is fixedly connected to the outside of the driving end wall plate, the gear end oil pipe assembly and the non-driving end oil pipe assembly are respectively fixedly connected to the outside of the non-driving end wall plate, one end of the driving end oil pipe assembly is fixedly connected to one end of the lubricating oil channel on the driving end wall plate, the other end of the lubricating oil channel is connected to an oil pipe, the other side of the oil pipe is respectively aligned with the bearing positions of the driving end of the driving impeller and the driven impeller in the Roots blower, so that the bearings of the driving end are precisely lubricated and cooled. The other end of the gear end oil pipe assembly is fixedly connected to one end of the lubricating oil channel on the non-driving end wall plate, the other end of the lubricating oil channel is connected to an oil pipe, the other side of the oil pipe is respectively aligned with the positions of the driving gear and the driven gear in the Roots blower, so that the driving gear and the driven gear are precisely lubricated and cooled. The other end of the non-driving end oil pipe assembly is fixedly connected to one end of the lubricating oil channel on the non-driving end wall plate, the other end of the lubricating oil channel is connected to an oil pipe, the other side of the oil pipe is respectively aligned with the bearing positions of the non-driving end of the driving impeller and the driven impeller in the Roots blower, so that the bearings of the non-driving end are precisely lubricated and cooled.

2. The Roots blower with dual oil pump circulation cooling device according to claim 1, characterized in that: The oil outlet of the oil tank is provided with a filter between the oil outlet and the oil pipe on the side of the oil outlet, the filter is fixedly connected with the outside of the oil tank, the oil inlet of the filter is fixedly connected with the oil outlet of the oil tank, the oil outlet of the filter is fixedly connected with the oil inlet of the oil pipe, the oil outlet of the oil pipe is provided with a pressure transmitter on the side of the oil outlet, the oil outlet of the oil pipe is fixedly connected with the oil inlet of the pressure transmitter, the oil outlet of the pressure transmitter is provided with a four-way joint on the side of the oil outlet, the oil outlet of the pressure transmitter is fixedly connected with the fourth interface of the four-way joint, the fifth interface and the sixth interface of the four-way joint are fixedly connected with the fifth valve and the sixth valve respectively, and the seventh interface of the four-way joint is fixedly provided with the seventh valve.

3. The Roots blower with dual oil pump circulation cooling device according to claim 2, characterized in that: The oil outlets of the first oil pump and the second oil pump are respectively provided with the first one-way valve and the second one-way valve, the oil outlets of the first oil pump and the second oil pump are fixedly connected with the oil inlets of the first one-way valve and the second one-way valve respectively, the first one-way valve and the second one-way valve are fixedly connected with the second interface and the first interface on the three-way joint on the side of the oil outlets of the first oil pump and the second oil pump respectively, the third interface is fixedly connected with one end of the oil pipe, the other end of the oil pipe is provided with a four-way joint between the cooler, the oil pipe is fixedly connected with the fourth interface of the four-way joint, the first valve is fixedly connected on the fifth interface, the other end of the first valve is fixedly connected with the oil pipe, the other end of the oil pipe is fixedly connected with the oil inlet of the oil tank, the eighth valve is fixedly connected on the sixth interface, and the seventh interface is fixedly connected with the oil inlet of the cooler.

4. The Roots blower with dual oil pump circulation cooling device according to claim 1, characterized in that: The drive end oil pipe assembly comprises a drive end fourth oil pipe, one end of the drive end fourth oil pipe is fixedly connected with the fifth interface of the four-way joint on the side of the oil outlet of the cooler, the other end of the drive end fourth oil pipe is connected with the third valve, the other end of the third valve is connected with the drive end filter, the other end of the drive end filter is provided with a three-way joint, the drive end filter is fixedly connected with the first interface of the three-way joint, the second interface and the third interface of the three-way joint are respectively provided with flow indicators on the side of the second interface and the third interface, the oil inlets of the flow indicators are fixedly connected with the second interface and the third interface respectively, the oil outlets of the two flow indicators are respectively connected with the drive end first oil pipe and the drive end second oil pipe, the lubricating oil paths on the drive end wall plate comprise a first lubricating oil path and a second lubricating oil path, the other ends of the drive end first oil pipe and the drive end second oil pipe are respectively fixedly connected with one end of the first lubricating oil path and the second lubricating oil path, the other ends of the first lubricating oil path and the second lubricating oil path are respectively connected with oil pipes, the other sides of the two oil pipes are respectively aligned with the bearing positions of the drive end of the driving impeller and the driven impeller inside the Roots blower, so that the bearings of the drive end are precisely sprayed and lubricated and cooled.

5. The Roots blower with dual oil pump circulation cooling device according to claim 1, characterized in that: The gear end oil pipe assembly comprises a gear end first oil pipe, one end of the gear end first oil pipe is fixedly connected with a sixth interface on a four-way joint on one side of an oil outlet of the cooler, the other end of the gear end first oil pipe is provided with a flow indicator, the gear end first oil pipe is fixedly connected with an oil inlet of the flow indicator, one side of an oil outlet of the flow indicator is provided with a three-way joint, the oil outlet of the flow indicator is fixedly connected with a first interface of the three-way joint, a fourth valve is connected to a second interface of the three-way joint, the other end of the fourth valve is connected with a pressure gauge, the lubricating oil path on the non-driving end wall plate comprises a fifth lubricating oil path, a third interface of the three-way joint is fixedly connected with one end of the fifth lubricating oil path, the other end of the fifth lubricating oil path is connected with an oil pipe, the other side of the oil pipe is respectively aligned with positions of the driving gear and the driven gear inside the Roots blower, precise oil injection lubrication and cooling of the driving gear and the driven gear are realized.

6. The Roots blower with dual oil pump circulation cooling device according to claim 5, characterized in that: The oil pipe on one side of the fifth lubricating oil path is in the shape of T, a plurality of oil outlet holes are formed on one end of the T-shaped oil pipe away from the fifth lubricating oil path, the plurality of oil outlet holes are arranged in a "one" shape and are respectively aligned with the driving gear and the driven gear, precise oil injection lubrication and cooling of the driving gear and the driven gear are realized.

7. The Roots blower with dual oil pump circulation cooling device as claimed in claim 1 wherein: The non-driving end oil pipe assembly comprises a non-driving end fourth oil pipe, one end of the non-driving end fourth oil pipe is fixedly connected with a seventh interface on a four-way joint on one side of an oil outlet of the cooler, the other end of the non-driving end fourth oil pipe is connected with a second valve, the other end of the second valve is connected with a non-driving end filter, the other end of the non-driving end filter is provided with a three-way joint, the non-driving end filter is fixedly connected with a first interface of the three-way joint, flow indicators are respectively arranged on one side of a second interface and a third interface of the three-way joint, the second interface and the third interface are respectively fixedly connected with oil inlets of the flow indicators, the oil outlets of the two flow indicators are respectively connected with a non-driving end first oil pipe and a non-driving end second oil pipe, the lubricating oil path on the non-driving end wall plate further comprises a third lubricating oil path and a fourth lubricating oil path, the non-driving end first oil pipe and the non-driving end second oil pipe are respectively fixedly connected with one end of the third lubricating oil path and the fourth lubricating oil path, the other end of the third lubricating oil path and the fourth lubricating oil path is respectively connected with an oil pipe, the other side of the two oil pipes is respectively aligned with bearing positions of the non-driving end of the driving impeller and the driven impeller inside the Roots blower, precise oil injection lubrication and cooling of the bearings of the non-driving end are realized.

8. The Roots blower with dual oil pump circulation cooling device as claimed in claim 1 wherein: The cooler is fixedly connected with the outside of the oil tank through a fixing support; The four-way joint position on one side of the oil inlet of the cooler is fixed on the outside of the oil tank through a fixing support; The driving end oil pipe assembly is fixedly connected with the outside of the driving end wall plate through a fixing support; The gear end oil pipe assembly and the non-driving end oil pipe assembly are respectively fixedly connected with the outside of the non-driving end wall plate through fixing supports.

9. The Roots blower with dual oil pump circulation cooling arrangement as claimed in claim 1 wherein: One side of the first oil pump and the second oil pump is provided with an oil pump fixing frame, the first oil pump and the second oil pump are fixed on the upper end position of the oil pump fixing frame.

Images