Roots blower with multi-channel active sealing device

Abstract

The utility model provides a Roots blower with a multichannel driving sealing device, which is provided with a blower main body, the blower main body comprises a gear end wall plate, a driving end wall plate, a driving impeller shaft and a driven impeller shaft, and the gear end wall plate and the driving end wall plate are respectively provided with a longitudinally arranged sealing oil way. The lower end opening of the sealing oil way penetrates to the outer surfaces of the sealing shaft sleeves on the outer circumferences of the driving impeller shaft and the driven impeller shaft, an oil pipe is arranged in the sealing oil way, and the upper end opening of the oil pipe is connected with a first valve, a second valve and a third valve. The other end of the second valve can be connected with a nitrogen releasing device, and the other end of the third valve can be connected with an oil filling device. The Roots blower is provided with the active sealing device, so that gas in the inner cavity of the blower can be prevented from leaking outwards along a gap between the sealing shaft sleeve and the corresponding wall plate. The Roots blower can be widely applied to Roots blowers.

Description

TECHNICAL FIELD

[0001] The utility model relates to a roots blower, in particular to a roots blower with multichannel active sealing 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 sealing chamber.

[0003] During the long-time rotation of the driving impeller and the driven impeller on the roots blower, obvious gaps will appear between the sealing sleeves on the impeller shafts and the corresponding wall plates, causing the gas in the inner cavity of the roots blower to leak outward along the gaps, especially when the roots blower transmits harmful gas, the gas leakage will cause serious safety hazards. SUMMARY

[0004] The utility model provides a roots blower with multichannel active sealing device for solving the above technical problems, a plurality of active sealing devices are arranged on the roots blower, which can prevent the gas in the inner cavity of the roots blower from leaking outward along the gaps between the sealing sleeves and the corresponding wall plates, and safety hazards are avoided.

[0005] Therefore, the technical scheme of the utility model is a roots blower with multichannel active sealing device, which is provided with a blower main body, the blower main body includes a gear end wall plate, a driving end wall plate, an outer shell, a driving impeller shaft and a driven impeller shaft, the gear end wall plate and the driving end wall plate are respectively located on the left and right sides of the outer shell, the driving impeller shaft and the driven impeller shaft are respectively provided with impellers at the middle positions of the outer circumferences, the two impellers are respectively located in the inner cavities of the outer shell, the left and right sides of the driving impeller shaft and the driven impeller shaft are respectively located in the inner cavities of the gear end wall plate and the driving end wall plate, and the driving impeller shaft can drive the driven impeller shaft to rotate synchronously.

[0006] The outer circumferences of the driving impeller shaft and the driven impeller shaft are respectively provided with sealing sleeves at the adjacent positions on the left and right sides of the impellers and the inner circumferences of the corresponding positions of the gear end wall plate and the driving end wall plate.

[0007] The inner circumferences of the two sealing sleeves on one side of the gear end wall plate are respectively fixedly connected with the outer circumferences of the corresponding driving impeller shaft and driven impeller shaft, and the outer circumferences of the two sealing sleeves are respectively connected with the inner circumferences of the corresponding gear end wall plate and driving end wall plate through the rotary sealing connection of the sealing rings.

[0008] The inner circumferences of the two sealing sleeves on one side of the driving end wall plate are respectively fixedly connected with the outer circumferences of the corresponding driving impeller shaft and driven impeller shaft, and the outer circumferences of the two sealing sleeves are respectively connected with the inner circumferences of the corresponding gear end wall plate and driving end wall plate through the rotary sealing connection of the sealing rings.

[0009] The inner part of the gear end wall plate and the driving end wall plate is provided with a longitudinal sealing oil passage at the upper end of the four sealing shaft sleeves, the upper end of the four sealing oil passages is respectively penetrated to the outside of the gear end wall plate and the driving end wall plate, and the lower end of the four sealing oil passages is respectively penetrated to the outer surface of the corresponding four sealing shaft sleeves.

[0010] The inner part of the four sealing oil passages is respectively provided with an oil pipe at the upper segment position, the outer circumference of the oil pipe is sealingly connected with the inner circumference of the sealing oil passage, and the upper segment position of the four oil pipes is respectively located at the outside of the upper end of the gear end wall plate and the driving end wall plate.

[0011] The upper end of the oil pipe is provided with a four-way joint, the four-way joint is provided with a first interface, a second interface, a third interface and a fourth interface, the upper end of the oil pipe is fixedly connected with the fourth interface, and the first interface, the second interface and the third interface are respectively connected with a first valve, a second valve and a third valve.

[0012] The other end of the first valve and the second valve is respectively connected with a first air pipe and a second air pipe, and the other end of the first air pipe is communicated with the air inlet of the air blower.

[0013] The other end of the second air pipe is connected with a nitrogen releasing device, the nitrogen releasing device can fill nitrogen into the second air pipe, and then the nitrogen in the second air pipe can enter the sealing oil passage through the second valve, the second interface, the fourth interface and the oil pipe in sequence.

[0014] The other end of the third valve is connected with an oil filling device, the oil filling device can inject oil into the third valve, and then the oil in the third valve can enter the sealing oil passage through the third interface, the fourth interface and the oil pipe in sequence.

[0015] Preferably, the oil filling device is provided with a timer, and the interval time of the oil injection into the third valve can be controlled by the timer.

[0016] Preferably, the outer circumference of the sealing shaft sleeve is respectively provided with a groove on the left side and the right side, the sealing ring is located in the groove, and the port of the sealing oil passage close to the sealing shaft sleeve is located between the sealing rings on the left side and the right side.

[0017] The utility model discloses beneficial effect is, through with the oil pipe respectively with first valve, second valve, third valve intercommunication, first valve's other end with the air inlet intercommunication of air blower, when air blower runs, the negative pressure of air inlet place, the problem of the breakage of sealing washer in long time operation of air blower, when sealing washer breaks, the gas in the inner chamber of air blower enters the inside of sealing oil circuit through the gap between wallboard and sealing shaft sleeve, at this moment, through the negative pressure effect of air blower air inlet place, can the gas in sealing oil circuit is inhaled back to the inner chamber of air blower through oil pipe, fourth interface, first interface, first valve, first gas pipe and air blower air inlet in proper order, avoid the gas in sealing oil circuit to leak outwardly;

[0018] Since the other end of the second valve is connected to the nitrogen release device, the nitrogen release device can fill nitrogen into the second gas pipe, the nitrogen in the second gas pipe can enter the inside of the sealing oil circuit through the second valve, the second interface, the fourth interface and the oil pipe in sequence, when the sealing washer breaks, the nitrogen release device fills nitrogen into the sealing oil circuit, the pressure of the nitrogen is higher than the pressure at the outlet of the fan, so that the gas leaking into the sealing oil circuit through the gap between the wallboard and the sealing shaft sleeve is blocked in the inner chamber of the air blower, thereby preventing the gas in the inner chamber of the air blower from leaking outwardly along the gap between the wallboard and the sealing shaft sleeve.

[0019] Since the other end of the third valve is connected to the oil filling device, the oil filling device can inject oil into the third valve, the oil in the third valve can enter the inside of the sealing oil circuit through the third interface, the fourth interface and the oil pipe in sequence, and the oil is usually injected with yellow oil, when the sealing washer breaks, the yellow oil injected into the sealing oil circuit fills the sealing oil circuit and the gap between the wallboard and the sealing shaft sleeve, thereby preventing the gas from leaking outwardly.

[0020] The above three sealing methods form three kinds of active sealing devices, when the air blower is running, any one of the three methods can be selected according to the actual situation on site, the limitation is small, the application range is wide, and it will not be limited to a single sealing form, when the oil filling device is selected, the third valve needs to be opened, and the first valve and the second valve need to be closed, when any two of the other active sealing structures are selected, the same operation method is adopted, that is, the valve corresponding to the selected active sealing device is opened, and the other two valves are closed. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the front view of the utility model;

[0022] Figure 2 is the top view of the utility model;

[0023] Figure 3 is the right view of the utility model;

[0024] Figure 4 is the utility model Figure 1 the enlarged view of A in the figure.

[0025] Figure 5 is the utility model Figure 1 the enlarged view of B in the figure.

[0026] Explanation of symbols in the figure:

[0027] 1. blower main body;101. gear end wallboard;102. drive end wallboard;103. driving impeller shaft;104. impeller;105. outer shell;106. driven impeller shaft;2. sealing sleeve;3. sealing oil circuit;4. oil pipe;5. four-way joint;501. first interface;502. second interface;503. third interface;504. fourth interface;6. first valve;7. second valve;8. third valve;9. first air pipe;10. second air pipe;11. oil filling device;12. sealing ring. Specific implementation

[0028] The utility model will be further described below in combination with examples.

[0029] Through Figures 1-5 It can be seen that the Roots blower with multi-channel active sealing device is provided with a blower main body 1, the blower main body 1 includes gear end wallboard 101, drive end wallboard 102, outer shell 105, driving impeller shaft 103, driven impeller shaft 106, gear end wallboard 101 and drive end wallboard 102 are located at the left and right sides of outer shell 105 respectively, the outer circumferences of driving impeller shaft 103 and driven impeller shaft 106 are provided with impeller 104 at the middle positions respectively, two impellers 104 are located in the inner cavities of outer shell 105 respectively, the left and right sides of driving impeller shaft 103 and driven impeller shaft 106 are located in the inner cavities of gear end wallboard 101 and drive end wallboard 102 respectively, driving impeller shaft 103 can drive driven impeller shaft 106 to rotate synchronously.

[0030] The outer circumferences of driving impeller shaft 103 and driven impeller shaft 106 are located at the adjacent positions of the left and right sides of impeller 104 and are provided with sealing sleeve 2 between the inner circumferences of the corresponding positions of gear end wallboard 101 and drive end wallboard 102.

[0031] The inner circumferences of the two sealing sleeves 2 on one side of the gear end wall plate 101 are fixedly connected with the outer circumferences of the corresponding driving impeller shaft 103 and driven impeller shaft 106, the outer circumferences of the two sealing sleeves 2 are rotatably and sealingly connected with the inner circumferences of the corresponding gear end wall plate 101 and driving end wall plate 102 through sealing rings 12, the inner circumferences of the two sealing sleeves 2 on one side of the driving end wall plate 102 are fixedly connected with the outer circumferences of the corresponding driving impeller shaft 103 and driven impeller shaft 106, the outer circumferences of the two sealing sleeves 2 are rotatably and sealingly connected with the inner circumferences of the corresponding gear end wall plate 101 and driving end wall plate 102 through sealing rings 12, through the sealing effect of the sealing ring 12, it can prevent the gas in the air blower cavity from leaking outward along the gap between the sealing sleeve and the corresponding wall plate during the operation of the air blower, and avoid safety hazards.

[0032] The interiors of the gear end wall plate 101 and the driving end wall plate 102 are provided with longitudinally arranged sealing oil channels 3 at the upper end positions of the four sealing sleeves 2, the upper ports of the four sealing oil channels 3 respectively penetrate upward to the outside of the gear end wall plate 101 and the driving end wall plate 102, and the lower ports of the four sealing oil channels 3 respectively penetrate to the outer surfaces of the corresponding four sealing sleeves 2, so as to realize the through connection between the sealing oil channel 3 and the sealing ring 12.

[0033] The left and right sides of the outer circumference of the sealing sleeve 2 are respectively provided with grooves, and the sealing ring 12 is located in the interior of the groove, and the port of the sealing oil channel 3 close to the side of the sealing sleeve 2 is located between the left and right sealing rings 12.

[0034] Oil pipes 4 are respectively arranged in the interiors of the four sealing oil channels 3 at the upper segment positions, the outer circumferences of the oil pipes 4 are sealingly connected with the inner circumferences of the sealing oil channels 3, the upper segment positions of the four oil pipes 4 are respectively located at the upper end outside of the gear end wall plate 101 and the driving end wall plate 102, a four-way joint 5 is arranged on one side of the upper port of the oil pipe 4, the four-way joint 5 is provided with a first interface 501, a second interface 502, a third interface 503 and a fourth interface 504, the upper port of the oil pipe 4 is fixedly connected with the fourth interface 504, the first interface 501, the second interface 502 and the third interface 503 are respectively connected with a first valve 6, a second valve 7 and a third valve 8, and the other ends of the first valve 6 and the second valve 7 are respectively connected with a first air pipe 9 and a second air pipe 10.

[0035] The other end of the first air pipe 9 is communicated with the air inlet of the air blower, and the air inlet generates negative pressure when the air blower is running. In the long-term operation of the air blower, the sealing ring 12 is inevitably damaged. When the sealing ring 12 is damaged, the gas in the air blower cavity enters the inside of the sealing oil way 3 through the gap between the wall plate and the sealing sleeve. At this time, the gas in the sealing oil way 3 is sucked back into the air blower cavity through the negative pressure at the air inlet of the air blower in turn through the oil pipe 4, the fourth interface 504, the first interface 501, the first valve 6, the first air pipe 9 and the air inlet of the air blower, thereby avoiding the gas in the sealing oil way 3 from leaking outward.

[0036] The other end of the second air pipe 10 can be connected to a nitrogen release device. The nitrogen release device can fill nitrogen into the second air pipe 10. Then, the nitrogen in the second air pipe 10 can enter the inside of the sealing oil way 3 in turn through the second valve 7, the second interface 502, the fourth interface 504 and the oil pipe 4. When the sealing ring 12 is damaged, the nitrogen release device fills nitrogen into the sealing oil way 3. The pressure of the nitrogen is higher than the pressure at the air outlet of the air blower, so that the gas leaking into the sealing oil way 3 through the gap between the wall plate and the sealing sleeve is blocked in the air blower cavity, thereby avoiding the gas in the air blower cavity from leaking outward along the gap between the wall plate and the sealing sleeve.

[0037] The other end of the third valve 8 can be connected to an oil filling device 11. The oil filling device 11 can inject oil into the third valve 8. Then, the oil in the third valve 8 can enter the inside of the sealing oil way 3 in turn through the third interface 503, the fourth interface 504 and the oil pipe 4. Usually, grease is injected. When the sealing ring 12 is damaged, the grease injected into the inside of the sealing oil way 3 fills the sealing oil way 3 and the gap between the wall plate and the sealing sleeve, thereby preventing the gas from leaking outward.

[0038] According to the actual situation on site, any one of the above active sealing structures can be selected. When the oil filling device 11 is selected, the third valve 8 needs to be opened, and the first valve 6 and the second valve 7 need to be closed. When any two of the other active sealing structures are selected, the same operation method is adopted, that is, the valve corresponding to the selected active sealing structure is opened, and the other two valves are closed.

[0039] For the specific structure of the oil filling device 11, a timer is arranged on the oil filling device 11. The interval time of the oil injection into the inside of the third valve 8 can be controlled through the timer, automatic injection is realized, and the injection can be set to be once every three months or once every half year according to the actual situation. The operation is convenient and fast, and the gas in the air blower cavity can be continuously prevented from leaking outward.

[0040] The above is only a specific embodiment of the present application, and cannot limit the scope of the present application. The replacement of equivalent components or equivalent changes and modifications within the scope of the present application should still be within the scope of the present application.

Claims

1. A Roots blower with a multi-channel active sealing device, characterized in that: The blower body is provided with a gear end wall plate, a driving end wall plate, an outer shell, a driving impeller shaft and a driven impeller shaft, the gear end wall plate and the driving end wall plate are respectively located at the left and right sides of the outer shell, the driving impeller shaft and the driven impeller shaft are respectively provided with impellers at the middle positions of the outer circumferences, the two impellers are respectively located in the inner cavities of the outer shell, the driving impeller shaft and the driven impeller shaft are respectively located in the inner cavities of the gear end wall plate and the driving end wall plate at the left and right sides of the impellers, and the driving impeller shaft can drive the driven impeller shaft to rotate synchronously. The outer circumferences of the driving impeller shaft and the driven impeller shaft are respectively provided with sealing sleeves at the adjacent positions on the left and right sides of the impellers. The inner circumferences of the two sealing sleeves on the side of the gear end wall plate are respectively fixedly connected with the outer circumferences of the driving impeller shaft and the driven impeller shaft, and the outer circumferences of the two sealing sleeves are respectively rotatably and sealingly connected with the inner circumferences of the gear end wall plate and the driving end wall plate through sealing rings. The inner circumferences of the two sealing sleeves on the side of the driving end wall plate are respectively fixedly connected with the outer circumferences of the driving impeller shaft and the driven impeller shaft, and the outer circumferences of the two sealing sleeves are respectively rotatably and sealingly connected with the inner circumferences of the gear end wall plate and the driving end wall plate through sealing rings. The inner parts of the gear end wall plate and the driving end wall plate are respectively provided with longitudinally arranged sealing oil channels at the upper end positions of the four sealing sleeves, the upper ports of the four sealing oil channels are respectively upwardly penetrated to the outer sides of the gear end wall plate and the driving end wall plate, and the lower ports of the four sealing oil channels are respectively penetrated to the outer surfaces of the four sealing sleeves. The inner parts of the four sealing oil channels are respectively provided with oil pipes at the upper segment positions, the outer circumferences of the oil pipes are sealingly connected with the inner circumferences of the sealing oil channels, and the upper segment positions of the four oil pipes are respectively located at the upper outer sides of the gear end wall plate and the driving end wall plate. A four-way joint is arranged at the upper port of the oil pipe, the four-way joint is provided with a first interface, a second interface, a third interface and a fourth interface, the upper port of the oil pipe is fixedly connected with the fourth interface, and the first interface, the second interface and the third interface are respectively connected with a first valve, a second valve and a third valve. The other end of the first valve and the second valve is respectively connected with a first air pipe and a second air pipe, and the other end of the first air pipe is in communication with the air inlet of the blower. The other end of the second air pipe can be connected with a nitrogen releasing device, the nitrogen releasing device can fill nitrogen into the second air pipe, and then the nitrogen in the second air pipe can enter the inner part of the sealing oil channel through the second valve, the second interface, the fourth interface and the oil pipe in sequence. The other end of the third valve can be connected with an oil filling device, the oil filling device can inject oil into the third valve, and then the oil in the third valve can enter the inner part of the sealing oil channel through the third interface, the fourth interface and the oil pipe in sequence.

2. The Roots blower with multi-channel active sealing device according to claim 1, characterized in that: A timer is arranged on the oil filling device, and the interval time of the oil injection into the inner part of the third valve can be controlled through the timer.

3. The Roots blower with multi-channel active sealing device according to claim 1, characterized in that: The left and right sides of the outer circumference of the sealing bush are respectively provided with grooves, the sealing ring is located inside the grooves, and the ports on the sealing oil path close to the sealing bush are located between the left and right sealing rings.

Images