Root's blower with torsional rotor

Abstract

The utility model discloses a Root's blower with torsional rotors, which comprises a casing and two rotors arranged in the casing. Each rotor is provided with a wheel blade part and rotating shafts protruding out of the two ends of the wheel blade part. More than two protruding circular blades are formed in the section direction of the wheel blade part, and the circular blades are uniformly distributed on the 360-degree circumference. A concave circular blade groove is formed between every two circular blades, the circular blade grooves are matched with the circular blades in outline, and the circular blades and the circular blade grooves are spirally twisted from one end of the wheel blade part to the other end of the wheel blade part. Due to the design of the torsion type rotor, gas conveying is smoother, gas pulsation and energy loss are reduced, conveying efficiency and stability are improved, noise and vibration are reduced, meanwhile, energy is saved by more than 15%, and the service life of the air blower is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of Roots blower with torsional rotor, especially to Roots blower with torsional rotor. BACKGROUND

[0002] Nowadays, the Roots blower is commonly used for sewage aeration treatment, nitrogen delivery, powder delivery, humidity adjustment in textile factory, gas delivery in aquaculture, heavy oil spraying, liquid medicine stirring, electroplating liquid stirring, paper pulp moisture absorption in papermaking industry, glass industry, air source in ice factory, air pressure in tunnel engineering and underground tunneling, drying, vacuum suction, etc.

[0003] In the structure of the existing Roots blower, a pair of rotors rotating synchronously are mainly included, the blades of the two rotors are designed as straight blades extending in the axial direction and are installed in the casing to rotate in opposite directions without contact. When rotating, the gas enters through an air inlet on the casing of the Roots blower, and then is pushed to another air outlet with the rotation of the rotors to achieve the effect of gas delivery. Since a small gap is maintained between the rotors and between the rotors and the casing, direct contact wear is avoided, and such a structure enables the Roots blower to operate without lubrication and has basic delivery function.

[0004] However, the straight blade design of the rotors of the existing Roots blower also has some disadvantages. Since the straight blades cannot effectively control the compression and expansion of the airflow, energy loss and power consumption are easily caused, and the overall energy conversion efficiency is relatively low. In addition, the instantaneous pressure change and airflow disturbance caused by the entry and exit of the gas are relatively obvious, and the noise and vibration problems are relatively obvious, especially in the case of high-speed operation, these phenomena are more prominent. At the same time, pulsation phenomenon occurs during gas delivery, and the gas is intermittently delivered, causing large changes in flow and pressure, which is not conducive to the demand for stable delivery.

[0005] Therefore, how to improve the above-mentioned shortcomings of the rotor operation of the Roots blower is the problem to be actively overcome by the utility model. UTILITY MODEL CONTENT

[0006] The main purpose of the utility model is to provide a Roots blower with torsional rotor, which forms special spiral twisted blades through the structure design of the blade parts of the two rotors, and is superior to the existing Roots blower with straight blade design in terms of energy saving, efficiency, stability, noise suppression and durability.

[0007] In order to achieve the above object, the utility model provides a rotameter blower with twisted rotors, which preferably comprises a casing and two rotors. The casing is a closed shell, and a rotor chamber is formed in the casing. An air inlet and an air outlet are provided on the casing. The two rotors are arranged side by side in the rotor chamber. One of the two rotors is a driving rotor, and the other is a driven rotor. Each rotor has a wheel blade and a rotating shaft protruding from both ends of the wheel blade. The cross section of the wheel blade is formed with two or more protruding circular blades, which are evenly distributed in a 360-degree circle. The circular blades are connected to the wheel blade to form a circular blade groove. The circular blades and the circular blade groove are twisted spirally from one end of the wheel blade to the other end.

[0008] In one preferred technical solution, the circular blade has a through hole at the center, which is twisted spirally together with the circular blade. The through hole is connected to both ends of the wheel blade.

[0009] In one preferred technical solution, the wheel blade and the rotating shaft are integrally formed.

[0010] In one preferred technical solution, the wheel blade has a recess hole at the center of each end, and the rotating shaft is divided into a first rotating shaft and a second rotating shaft. The first rotating shaft and the second rotating shaft are respectively inserted into the recess holes of the wheel blade.

[0011] In one preferred technical solution, the wheel blade has an axial hole at the center, and the rotating shaft is a single shaft. The rotating shaft is arranged in the axial hole, and the two ends of the rotating shaft protrude from the two ends of the wheel blade.

[0012] In one preferred technical solution, the rotameter blower with twisted rotors further comprises two gears that can be engaged with each other. The two gears are respectively combined with the rotating shafts at the same end of the two rotors, so that the two rotors rotate synchronously.

[0013] In one preferred technical solution, one end of the rotating shaft of one of the two rotors protrudes out of the casing and is combined with a transmission element.

[0014] In one preferred technical solution, the casing comprises a main shell, a front cover group, and a rear cover group. The main shell is provided with the rotor chamber connected to the front and rear ends of the main shell. The main shell is provided with the air inlet and the air outlet. The front cover group and the rear cover group are respectively combined with the front and rear ends of the main shell, and respectively seal the rotor chamber.

[0015] Compared with the traditional straight blade design, the Roots blower with the twisted rotor has significant advantages in many aspects:

[0016] (I) First, the circular blade and the spiral structure of the twisted rotor can realize continuous and smooth pushing of the gas during the conveying process, greatly reducing the airflow pulsation phenomenon, thereby making the conveying flow and pressure more stable and improving the operation efficiency.

[0017] (II) The spiral twisted design effectively reduces the disturbance caused by the instantaneous pressure change of the gas, further improves the noise problem of the blower, and achieves lower operation noise and vibration.

[0018] (III) Since the circular blades of the twisted rotor are distributed in a spiral shape along the direction of the rotating shaft, the gas can gradually advance when passing through the circular blade grooves between the blades, avoiding the severe compression and expansion of the gas in the traditional straight blade conveying, thereby reducing energy loss and improving overall conveying efficiency. The design of the utility model can effectively save more than 15% of energy, reduce operation power consumption under the same conveying efficiency, and realize more economical energy use.

[0019] (Four) The twisted structure also helps to uniformly disperse the pressure and load on the rotor, reduces mechanical loss, and prolongs the service life of the blower. Therefore, the design of the twisted rotor of the utility model is superior to the blower with the traditional straight blade design in terms of energy saving, efficiency, stability, noise suppression, and durability. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic view of the appearance of the Roots blower with the twisted rotor of the utility model.

[0021] Figure 2 is an exploded view of the Roots blower with the twisted rotor of the utility model.

[0022] Figure 3 is a top view of the two rotors of the Roots blower with the twisted rotor of the utility model.

[0023] Figure 4 is an end view of the two rotors of the Roots blower with the twisted rotor of the utility model.

[0024] Figure 5 is an exploded view of the one rotor and two rotating shafts combined embodiment of the utility model.

[0025] Figure 6 is an exploded view of the one rotor and one rotating shaft combined embodiment of the utility model.

[0026] SYMBOL DESCRIPTION

[0027] 10: housing

[0028] 11: rotor chamber

[0029] 12: air inlet hole

[0030] 13: air outlet hole

[0031] 14: main housing

[0032] 15: front cover group

[0033] 16: rear cover group

[0034] 20: rotor

[0035] 21: vane part

[0036] 211: circular blade

[0037] 212: circular blade groove

[0038] 213: through hole

[0039] 214: recess hole

[0040] 215: shaft hole

[0041] 22: rotating shaft

[0042] 221: first rotating shaft

[0043] 222: second rotating shaft

[0044] 30: gear

[0045] 40: transmission element DETAILED DESCRIPTION

[0046] In order to fully understand the purpose, features and effects of the utility model, the utility model will be described in detail through the following specific embodiments, and the accompanying drawings will be described as follows:

[0047] Referring to Figure 1 and Figure 2 , the utility model is a Roots blower with a torsional rotor, and the preferred specific embodiment mainly comprises a housing 10 and two rotors 20, wherein:

[0048] The machine shell 10 is a closed shell, and a rotor chamber 11 is arranged inside the machine shell 10. The machine shell 10 is provided with an air inlet hole 12 and an air outlet hole 13 which communicate with the rotor chamber 11. Preferably, the machine shell 10 is composed of a main shell 14, a front cover set 15 and a rear cover set 16. The main shell 14 is provided with the rotor chamber 11 which communicates with the front and rear ends of the main shell 14, and the air inlet hole 12 and the air outlet hole 13 are arranged outside the main shell 14. The front cover set 15 and the rear cover set 16 are respectively arranged at the front and rear ends of the main shell 14, and seal the rotor chamber 11. The machine shell 10 described above is only one of the embodiments, and is not used to limit the type or structure of the Roots blower shell of the utility model.

[0049] Referring to Figure 2 , Figure 3 and Figure 4 , the two rotors 20 are arranged side by side in the rotor chamber 11 of the machine shell 10. One of the rotors serves as a driving member, and the other rotor serves as a driven member. In particular, each rotor 20 is provided with a vane portion 21 and a shaft 22 which protrudes from both ends of the vane portion 21. The cross section of the vane portion 21 is formed with two or more protruding circular blades 211. In this embodiment, three circular blades 211 are arranged. The circular blades 211 are evenly distributed in a 360° circle. The circular blades 211 are arranged in a recessed circular groove 212. The circular groove 212 is matched with the profile of the circular blades 211. Moreover, the circular blades 211 and the circular groove 212 are twisted in a spiral manner from one end of the vane portion 21 to the other end of the vane portion 21. The twisted vane portion is the main feature of the utility model. In this embodiment, a through hole 213 is arranged at the center of each circular blade 211. The through hole 213 is twisted together with the circular blade 211. The through hole 213 communicates with both ends of the vane portion 21. The structure of the through hole 213 can reduce the weight of the rotor and save the driving power.

[0050] Referring to Figure 3 , the vane portion 21 and the shaft 22 of each rotor 20 can be integrally formed. Referring to Figure 5 , an axial recessed recess hole 214 can be arranged at the center of each end of the vane portion 21. The shaft 22 is divided into a first shaft 221 and a second shaft 222. One end of each of the first shaft 221 and the second shaft 222 is inserted into the recess hole 214 of the vane portion 21, thereby forming the rotor 20 of the utility model. Referring to Figure 6 , an axial hole 215 which communicates with both ends can be arranged at the center of the vane portion 21. The shaft 22 is implemented as a single shaft. The shaft 22 is arranged in the axial hole 215, and both ends of the shaft 22 protrude from both ends of the vane portion 21. In this way, the rotor 20 of the utility model can also be formed.

[0051] In order to realize the synchronous operation of the two rotors 20, the embodiment further comprises two gears 30 capable of engaging each other, which are arranged on the shafts 22 at the same end of the two rotors 20, when one of the rotors serves as a driving element to input power, the other rotor serves as a driven element through the transmission of the two gears 30, so that the two rotors 20 can rotate synchronously. With the rotation of the two rotors 20, the circular blades 211 of the blade part 21 drive the gas in the rotor chamber 11, and the air sucked at the air inlet hole 12 is pushed to the air outlet hole 13 through the rotor chamber 11, realizing the compression and discharge of the air. In addition, the shaft 22 at one end of one of the rotors 20 of the utility model protrudes out of the casing 10, and is combined with a transmission element 40 (such as Figure 1 shown), which can be a belt pulley, a gear or a coupling.

[0052] The torsion type rotor 20 of the utility model is designed to realize smooth pushing of the gas, reduce airflow pulsation, stabilize the delivery flow and pressure, and improve the operation efficiency through the spiral structure of the circular blade 211. The spiral torsion structure of the circular blade 211 effectively reduces the disturbance caused by the change of the gas pressure, improves the noise problem, and achieves lower operation noise and vibration. And the circular blade 211 is axially twisted, and the gas gradually advances between the blades, avoiding violent compression and expansion, reducing energy loss, improving delivery efficiency, saving energy by more than 15%, and reducing operation power consumption. In addition, the torsion type structure helps to uniformly disperse the rotor pressure and load, reduces mechanical loss, and prolongs the service life. The design of the utility model is superior to the existing straight blade design of the blower in terms of energy saving, efficiency, stability, noise suppression and durability.

[0053] The utility model has been disclosed in the foregoing with a preferred embodiment, but those skilled in the art should understand that the embodiment is only used to depict the utility model, and should not be interpreted as limiting the scope of the utility model. It should be noted that any equivalent changes and substitutions of the embodiment should be considered as covered within the scope of the utility model. Therefore, the protection scope of the utility model should be defined by the claims.

Claims

1. A Roots blower with a torsional rotor, comprising a housing and two rotors; the housing is a closed casing, the interior of which forms a rotor chamber, and the exterior of the rotor chamber is provided with an air inlet and an exhaust outlet communicating with the rotor chamber; the two rotors are arranged side by side in the rotor chamber, wherein one rotor is a driving member and the other rotor is a driven member, characterized in that... : Each rotor has a blade portion and a shaft protruding from both ends of the blade portion; the cross-sectional direction of the blade portion forms two or more protruding circular blades, which are evenly distributed within a 360° circumference; a recessed circular blade groove is formed between the circular blades, which matches the outline of the circular blade; and the circular blade and the circular blade groove spirally twist from one end of the blade portion to the other end of the blade portion.

2. The Roots blower with a torsional rotor as described in claim 1, characterized in that... The circular blade has a through hole at its center, which is spirally twisted together with the circular blade and connects to both ends of the impeller portion.

3. The Roots blower with a torsional rotor as described in claim 1, characterized in that... The circular blades are three in number, and the circular blade grooves are three in number.

4. The Roots blower with a torsional rotor as described in claim 1, 2, or 3, characterized in that... The impeller portion and the rotating shaft are integrally machined.

5. The Roots blower with a torsional rotor as described in claim 1, 2, or 3, characterized in that... The impeller portion has an axially recessed hole at the center of each end. The rotating shaft is divided into a first rotating shaft and a second rotating shaft, with one end of the first rotating shaft and the second rotating shaft respectively inserted into the recessed hole of the impeller portion.

6. The Roots blower with a torsional rotor as described in claim 1, 2, or 3, characterized in that... The impeller portion has a central shaft hole that extends to both ends. The shaft is a single shaft that passes through the shaft hole, and both ends of the shaft protrude beyond the ends of the impeller portion.

7. The Roots blower with a torsional rotor as described in claim 1, 2 or 3, characterized in that... It also includes two meshing gears, which are respectively connected to the shafts at the same end of the two rotors, so that the two rotors rotate synchronously.

8. The Roots blower with a torsional rotor as described in claim 1, 2 or 3, characterized in that... One of the two rotors has a shaft at one end protruding outside the housing and connected to a transmission element.

9. The Roots blower with a torsional rotor as described in claim 1, characterized in that... The housing includes a main housing, a front cover assembly, and a rear cover assembly; the main housing is provided with a rotor chamber connecting its front and rear ends, and the main housing is provided with an air inlet and an exhaust outlet; the front cover assembly and the rear cover assembly are respectively connected to the front and rear ends of the main housing and respectively seal the rotor chamber.

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