Anti-sticking and anti-grinding roots blower

Abstract

The utility model provides an anti-sticking and anti-grinding Roots blower which is provided with a blower assembly, the blower assembly comprises a blower outer shell, a rotating impeller is arranged in the blower outer shell, a rotating impeller outer end face is arranged on the rotating impeller, a groove is formed in the inner surface of the blower outer shell, and a rotating gap is formed between the groove and the rotating impeller outer end face. The roots blower solves the problems that in an existing roots blower, when conveyed gas contains many impurities, along with long-time high-speed rotation of an impeller, the impurities can be gradually adsorbed to the inner surface of a blower shell or the outer end face of the impeller, and along with the more and more impurities are adsorbed, the gap between the impeller and the blower shell becomes smaller and smaller; the problems of mutual friction between the impeller and the machine shell, obvious abrasion of the inner surfaces of the impeller and the machine shell, reduction of the service life of the impeller and the machine shell, obvious increase of the operation noise of the air blower, increase of the failure rate of the air blower and increase of the maintenance cost in the prior art are solved. The Roots blower can be widely applied to the operation of the Roots blower.

Description

Technical Field

[0001] The utility model relates to a Roots blower, in particular to an anti-sticking and abrasion Roots blower. Background Art

[0002] As a typical gas booster and conveyor, Roots blower is widely used in building materials, electric power, smelting, mining, aquaculture, sewage treatment, chemical industry and other industries.

[0003] It relies on the two intermeshing impellers (two or three blades) in the casing to rotate at the same speed in relative directions to compress the air. The air enters from the blower inlet, is compressed by the impeller, and is finally discharged from the outlet, completing the entire gas blowing transmission process.

[0004] In order to ensure the normal operation of the Roots blower, there is a certain gap between the impeller and the casing. During operation, the impeller rotates relative to the inner surface of the blower casing. However, when the transported gas contains more impurities, the impurities will gradually be adsorbed to the inner surface of the blower casing or the outer end face of the impeller. When the blower runs for a long time, more and more impurities are adsorbed, and the gap between the impeller and the casing becomes smaller and smaller, causing mutual friction between the impeller and the casing, resulting in obvious wear on the impeller and the inner surface of the casing, reducing the service life of the impeller and adjacent components, and significantly increasing the operating noise of the blower, increasing the failure rate of the blower, and increasing maintenance costs. Utility Model Content

[0005] In view of the above technical problems, the utility model provides an anti-adhesion and wear Roots blower, which can prevent impurities entering the shell from being adsorbed to the inner surface of the blower casing or the outer end surface of the impeller when the blower is running, thereby ensuring that there is no mutual friction between the impeller and the casing, extending the service life of the impeller and adjacent components, reducing the operating noise of the blower, reducing the failure rate of the blower, and reducing maintenance costs.

[0006] To this end, the technical solution of the utility model is a wear-resistant Roots blower, which is provided with a blower assembly, the blower assembly including a blower outer shell, a rotating impeller is fixedly provided inside the blower outer shell, a rotating impeller outer end surface is provided on the rotating impeller, a groove is provided on the inner surface of the blower outer shell, and a rotating gap is provided between the groove and the outer end surface of the rotating impeller.

[0007] Preferably, there are multiple grooves, and a supporting end surface is provided between the notches of two connected grooves. The groove consists of a first groove surface and a second groove surface to form a groove with a pointed bottom. Support bosses are respectively provided on the first groove surface and the second groove surface, and the angle between the first groove surface and the second groove surface is 40°-80°.

[0008] Preferably, there are multiple grooves, and a supporting end surface is provided between the notches of two connected grooves. The groove consists of a first groove surface, a second groove surface and an arc surface to form a groove with an arc-shaped bottom. The first groove surface and the second groove surface are located on both sides of the groove, and the arc surface is located at the bottom end of the groove. The angle between the first groove surface and the second groove surface is 40°-80°, and the diameter of the arc surface 10304 is 3.5mm±1mm.

[0009] Preferably, the maximum depth dimension of the groove is 8 mm±1 mm.

[0010] Preferably, the width dimension of the support end surface between two connected grooves is 1.2 mm±0.2 mm.

[0011] Preferably, there are multiple supporting bosses on the first groove surface and the second groove surface respectively, and the multiple supporting bosses on the first groove surface and the second groove surface are staggered with each other, and the thickness of the supporting bosses is 0.6mm±0.2mm.

[0012] The beneficial effects of the utility model are:

[0013] 1. Since there are multiple grooves on the inner surface of the blower housing, when the blower is running, impurities entering with the air will enter the inside of the grooves, ensuring that there is sufficient rotation clearance between the outer end surface of the rotating impeller and the inner surface of the blower housing, avoiding friction between the outer end surface of the rotating impeller and the inner surface of the blower housing;

[0014] Moreover, the airflow generated by the high-speed rotation of the impeller causes an airflow impact on the impurities inside the grooves, causing the impurities that fall into the grooves to move irregularly among multiple grooves. When the impurities move to the grooves near the air outlet, they will be discharged from the air outlet in the direction of the airflow.

[0015] 2. By providing supporting bosses on the groove surface of the groove, and the supporting bosses are arranged irregularly on the groove surface of the groove, when too many impurities enter the groove, the supporting bosses irregularly support the impurities, so that multiple gap holes are formed between the impurities and the groove surface of the groove, thereby preventing excessive accumulation of impurities in the groove and mutual squeezing, and mutual adsorption between the impurities and the groove surface. In this way, the airflow generated by the rotation of the rotating impeller passes through the irregular gap holes between the impurities and the groove surface of the groove, and impacts the impurities in the groove from multiple directions, thereby accelerating the speed of impurities moving between multiple grooves, shortening the time that impurities stay in the blower casing, and further ensuring the stability of the rotating impeller inside the blower during long-term operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of a Roots blower used in the utility model;

[0017] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 This is a groove structure diagram of another embodiment of the utility model;

[0019] Figure 4 This is a groove structure diagram of another embodiment of the utility model.

[0020] Explanation of symbols in the figure:

[0021] 1. Blower assembly; 101. Blower outer shell; 102. Rotating impeller; 10201. Rotating impeller outer end surface; 103. Groove; 10301. First groove surface; 10302. Second groove surface; 10303. Support boss; 10304. Arc surface; 104. Support end surface; 2. Rotational gap. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with embodiments.

[0023] pass Figure 1-Figure 4 It can be seen that the anti-stick and wear Roots blower is provided with a blower assembly 1, which includes a blower outer shell 101, a rotating impeller 102 is fixedly provided inside the blower outer shell 101, a rotating impeller outer end surface 10201 is provided on the rotating impeller 102, a groove 103 is provided on the inner surface of the blower outer shell 101, and a rotating gap 2 is provided between the groove 103 and the rotating impeller outer end surface 10201.

[0024] There are multiple grooves 103, and a supporting end surface 104 is provided between the notches of two connected grooves 103. The groove 103 consists of a first groove surface 10301 and a second groove surface 10302, forming a groove with a pointed bottom. The first groove surface 10301 and the second groove surface 10302 are respectively provided with supporting bosses 10303, which play a supporting role for impurities entering the groove 103, and form a gap between the impurities and the groove surface to prevent the impurities inside the groove 103 from sticking to the groove surface of the groove and being difficult to detach, which eventually leads to more and more accumulation of impurities, exceeding the outer plane of the groove 103, causing different degrees of friction to the rotating impeller 102, and the angle between the first groove surface 10301 and the second groove surface 10302 is 40°-80°. When the rotating impeller 102 rotates at high speed, the generated airflow impacts the impurities inside the groove 103, and the angle between the first groove surface 10301 and the second groove surface 10302 is set to 40°-80°, which can It is ensured that impurities can smoothly enter the interior of the groove 103, and when the impurities inside are impacted by the airflow, the groove of this angle can also play a guiding role, and can quickly and smoothly enter the interior of other grooves 103 along the groove surface. If the angle is too small, after the impurities enter the interior of the groove 103, when impacted by the airflow, the airflow will form a small angle rebound, and the impurities in the groove 103 will quickly and irregularly pop out, causing different degrees of bumps on the outer surface of the rotating impeller 102 and surrounding parts, reducing the service life of the rotating impeller 102 and surrounding parts. If the angle is too large, the position of the groove 103 near the outside will continue to be disturbed by the airflow generated by the rotation of the rotating impeller 102, making it difficult for impurities to enter the interior of the groove 103. Most of the impurities will linger in the position near the outside of the groove 103, which will continue to cause bumps on the rotating impeller 102 and the inner surface of the blower outer shell 101, and due to the bumps of the impurities on related components, the operating noise of the blower will increase.

[0025] With respect to the structural features of the groove 103, a more preferred solution is that there are multiple grooves 103, and a supporting end surface 104 is provided between the notches of two connected grooves 103. The groove 103 is composed of a first groove surface 10301, a second groove surface 10302 and an arc surface 10304, forming a groove with an arc-shaped bottom. The first groove surface 10301 and the second groove surface 10302 are located at both sides of the groove 103, and the arc surface 10304 is located at the bottom of the groove 103. The arc surface 10304 can prevent impurities entering the bottom of the groove 103 from forming accumulation. When the airflow impacts the impurities, the arc surface 10304 can play a certain drainage role in the movement of the impurities, prompting the impurities to move outward along the groove surface of the groove. The impeller 102 has a first groove 10301 and a second groove 10302, and the impeller 102 has a second groove 10304. The first groove 10301 and the second groove 10302 have a first groove 10302 and a second groove 103 ... has a second groove 10302 and a second groove 10303. The first groove 103 has a second groove 10302 and a second groove 10303. The first groove 103 has a second groove 10302 and a second groove 10303. The first groove 103 has a second groove 10302 and a second groove 10302. The first groove 103 has a second groove 10302 and a second groove 10303. The first groove 103 has a second groove 10302 and a second groove 10302. The first groove 103 has a second groove 10302 and a second groove 10302. The first groove 103 has a second groove 10302 and a second groove 10302.

[0026] The width dimension of the support end face 104 between the two connected grooves 103 is 1.2mm±0.2mm, which can ensure that after the impurities move out along the groove surface, they can quickly enter the connected grooves, avoiding the impurities staying on the support end face 104 for too long due to the excessive width dimension of the support end face 104, and forming impurity accumulation on the surface of the support end face 104. When the impurities on the support end face 104 accumulate too much, it will cause friction to the outer surface of the rotating impeller 102. In addition, if the width dimension of the support end face 104 is too large, the contact area between the impurities and the support end face 104 will increase, making it easier for the impurities to be adsorbed on the support end face 104, causing collision and friction on the outer surface of the rotating impeller 102 when the rotating impeller 102 rotates, thereby shortening the service life of the rotating impeller 102.

[0027] There are multiple supporting bosses 10303 on the first groove surface 10301 and the second groove surface 10302 respectively. The multiple supporting bosses 10303 on the first groove surface 10301 and the second groove surface 10302 are staggered with each other, and the thickness of the supporting bosses 10303 is 0.6 mm±0.2 mm.

[0028] Since the support bosses are arranged in an interlaced manner on the groove surface of the groove 103, when too many impurities enter the groove, the support bosses provide irregular support to the impurities, so that a plurality of gap holes are formed between the impurities and the groove surface of the groove, thereby preventing excessive accumulation of impurities in the groove and mutual squeezing, and mutual adsorption between the impurities and the groove surface. In this way, the airflow generated by the rotation of the rotating impeller passes through the irregular gap holes between the impurities and the groove surface, impacting the impurities in the groove from multiple directions, thereby accelerating the speed at which the impurities move between the multiple grooves, shortening the time that the impurities stay in the blower casing, and further ensuring the stability of the rotating impeller inside the blower during long-term operation.

[0029] According to the principle of diffuse reflection of sound waves, when sound waves hit an uneven surface, they will be reflected irregularly in all directions, and the generated sound wave energy will cancel each other out. Therefore, providing multiple grooves 103 on the inner surface of the blower housing can effectively reduce the noise generated during the operation of the blower.

[0030] However, what is described above is only a specific embodiment of the present invention and should not be used to limit the scope of implementation of the present invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the scope of protection of the patent of the present invention should still fall within the scope covered by the claims of the present invention.

Claims

1. An anti-sticking and abrasion Roots blower, characterized by: A blower assembly is provided, which includes a blower outer shell, a rotating impeller is fixedly provided inside the blower outer shell, a rotating impeller outer end surface is provided on the rotating impeller, a groove is provided on the inner surface of the blower outer shell, and a rotating gap is provided between the groove and the rotating impeller outer end surface.

2. The anti-adhesion and wear Roots blower according to claim 1, characterized in that: There are multiple grooves, and a supporting end surface is provided between the notches of two connected grooves. The groove consists of a first groove surface and a second groove surface to form a groove with a pointed bottom. Support bosses are respectively provided on the first groove surface and the second groove surface, and the angle between the first groove surface and the second groove surface is 40°-80°.

3. The anti-adhesion and wear Roots blower according to claim 1, characterized in that: There are multiple grooves, and a supporting end surface is provided between the notches of two connected grooves. The groove is composed of a first groove surface, a second groove surface and an arc surface to form a groove with an arc-shaped bottom. The first groove surface and the second groove surface are located on both sides of the groove, and the arc surface is located at the bottom end of the groove. Support bosses are respectively provided on the first groove surface and the second groove surface. The angle between the first groove surface and the second groove surface is 40°-80°, and the diameter of the arc surface is 3.5mm±1mm.

4. The anti-adhesion and wear Roots blower according to claim 2 or 3, characterized in that: The width dimension of the support end surface between two connected grooves is 1.2 mm±0.2 mm.

5. The anti-adhesion and wear Roots blower according to claim 2 or 3, characterized in that: The number of the supporting bosses on the first groove surface and the second groove surface is respectively multiple, the multiple supporting bosses on the first groove surface and the second groove surface are staggered with each other, and the thickness of the supporting bosses is 0.6mm±0.2mm.

6. The anti-sticking and anti-friction Roots blower according to claim 1, characterized in that: The maximum depth of the groove is 8 mm ± 1 mm.

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