Roots blower impeller clearance adjustment tool and adjustment method

Abstract

The present invention discloses a Roots blower impeller clearance adjustment tool and adjustment method, the tool comprises a limiter that can extend into the air hole of the Roots blower housing, and the length of the limiter is greater than the diameter of the air hole; the lower end of the limiter is provided with a limiter for limiting the rotation of the first impeller, and the limiter is provided with an adjustment screw for resisting and limiting the rotation of the second impeller, and the direction in which the second impeller is restricted to rotate is the same as the direction in which the first impeller is restricted to rotate. By adopting the tool of the present invention, the state of the optimal matching clearance between the two impellers can be fixed, and then the positions of the gears, the impeller shaft, and the bearings can be fixed, thereby avoiding the problem that the clearance between the two impellers in the prior art will change.

Description

Technical Field

[0001] The invention relates to the technical field of Roots blowers, and in particular to a Roots blower impeller clearance adjustment tool and an adjustment method. Background Art

[0002] Roots blower is a positive displacement blower. The principle of Roots blower is a rotary compressor that uses two blade-shaped rotors to make relative motion in the cylinder to compress and transport gas. This blower has a simple structure and is easy to manufacture. It is widely used in aquaculture oxygenation, sewage treatment aeration, cement transportation, and is more suitable for gas transportation and pressurization systems in low-pressure situations. It can also be used as a vacuum pump, etc.

[0003] At present, after the commonly used Roots blower has installed the impeller, bearing and gear, it is necessary to use a feeler gauge to check the gap between the two impellers, and then make fine adjustments to maintain the best matching gap between the impellers. When using the existing adjustment method, after determining the gap between the two impellers, it is necessary to further install a locking nut to fix the position of the gear and the impeller shaft. In this process, it is easy to cause the impeller shaft to rotate, thereby causing the gap between the two impellers to change. Summary of the invention

[0004] In view of the above problems, the object of the present invention is to provide a Roots blower impeller clearance adjustment tool and adjustment method to solve the problem of inconvenient impeller clearance adjustment in the prior art.

[0005] In order to achieve the above-mentioned purpose, the Roots blower impeller gap adjustment tool of the present invention is characterized in that it includes a limit member that can extend into the air hole of the Roots blower housing, and the length of the limit member is greater than the diameter of the air hole; the lower end of the limit member is provided with a limit portion for limiting the rotation of the first impeller, and the limit member is provided with an adjusting screw for supporting and limiting the rotation of the second impeller, and the direction in which the second impeller is restricted from rotating is the same as the direction in which the first impeller is restricted from rotating.

[0006] In a preferred embodiment of the present invention, the upper surface of the limiting member is provided with at least one step matched with the air hole of the Roots blower housing.

[0007] In a preferred embodiment of the present invention, an oblique screw hole is provided on the limiting member, and the adjusting screw is installed in the oblique screw hole.

[0008] Furthermore, a V-shaped section is provided on the limiting member, and the oblique screw hole is provided at the V-shaped section.

[0009] In a preferred embodiment of the present invention, the height of the limiting member is greater than the minimum gap between the first impeller and the air hole.

[0010] In a preferred embodiment of the present invention, both ends of the limiting member are provided with inner inclined edges to prevent collision with the impeller.

[0011] The method for adjusting the gap adjustment tool of the Roots blower impeller of the present invention is characterized by comprising the following steps:

[0012] A. Install the two impellers, bearings and gears first, adjust the positions of the two impellers in advance, and insert the feeler gauge into the gap between the two impellers;

[0013] B. Put the Roots blower impeller gap adjustment tool into the air hole position in the Roots blower housing, and set the Roots blower impeller gap adjustment tool above the two impellers along the radial direction of the impellers. By rotating the impeller shaft, the first impeller lifts the Roots blower impeller gap adjustment tool until both ends of the Roots blower impeller gap adjustment tool are supported by the edges of the air hole.

[0014] C. Tighten the adjusting screw so that it presses against the second impeller, so that the second impeller cannot rotate in the same direction as the first impeller is restricted from rotating; at this time, the feeler gauge is clamped between the two impellers;

[0015] D. The location of fixed gears, impeller shafts, and bearings;

[0016] E. Loosen the adjusting screw, remove the Roots blower impeller clearance adjustment tooling, and take out the feeler gauge.

[0017] By adopting the tooling of the present invention, the state of the optimal matching clearance between the two impellers can be fixed, and then the positions of the gears, impeller shafts, and bearings can be fixed, thereby avoiding the problem of changes in the clearance between the two impellers in the prior art.

[0018] The invention has the characteristics of simple structure, convenient operation, portability and low cost.

[0019] The features of the present invention can be clearly understood by referring to the drawings and the following detailed description of the preferred embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the Roots blower impeller clearance adjustment tooling.

[0021] Figure 2 Cross-sectional view of the Roots blower impeller clearance adjustment fixture.

[0022] Figure 3 This is a schematic diagram of the usage status of the Roots blower impeller clearance adjustment tooling. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the implementation methods of the present application, not all of the implementation methods; and the structures shown in the accompanying drawings are only schematic and do not represent physical objects. It should be noted that based on these embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0024] It should be noted that the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion in this article, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical or equivalent elements in the process, method, article or device including the elements.

[0025] The terms "upper", "lower", "inner", "outer", etc. do not constitute absolute spatial relationship limitations, but are only concepts of relative positions, which can be understood by those skilled in the art.

[0026] See also Figure 1-3 The Roots blower impeller clearance adjustment tool comprises a stopper 10, and the stopper 10 is in the shape of a long strip of stopper. The stopper 10 is a metal part, which is integrally formed. The length of the stopper is greater than the diameter of the air hole (the air inlet 21 or the air outlet 22) of the Roots blower housing; the stopper can extend into the air hole of the Roots blower housing.

[0027] The lower end of the limiter is provided with a limiter 11 for limiting the rotation of the first impeller. In this embodiment, the height of the limiter 10 is greater than the minimum gap between the first impeller and the air hole. That is, the lower end of the limiter 10 is the limiter 11. Of course, the limiter 11 can also be a protruding portion protruding downward.

[0028] The limiter is provided with a V-shaped section 12, and an oblique screw hole 13 is provided at the position of the V-shaped section 12, and the adjusting screw 14 is installed in the oblique screw hole 13. The second impeller is limited to rotate by the adjusting screw 14, and the direction in which the second impeller is limited to rotate is the same as the direction in which the first impeller is limited to rotate. The adjusting screw is arranged obliquely to facilitate supporting the side of the second impeller and increase the contact area.

[0029] The upper surface of the limiting member is provided with a step 15 adapted to the air inlet 21 of the Roots blower housing. When the limiting member is pushed upward by the first impeller, the step 15 is stuck on the edge of the air inlet 21 to play a limiting role. The limiting direction of the step 15 is opposite to the limiting direction of the adjusting screw 14.

[0030] In addition, inner inclined edges 16 are provided at both ends of the limiting member 10 to prevent collision with the impeller.

[0031] See also Figure 3 The adjustment method of the Roots blower impeller clearance adjustment tool comprises the following steps:

[0032] A. Install the two impellers (24, 25), bearings and gears first, adjust the positions of the two impellers in advance (try to make the two impellers tilt to the same side), and insert the feeler gauge 23 into the gap between the two impellers;

[0033] B. Place the limiting member 10 at the air inlet 21 (or turn the housing over and place it at the air outlet) in the Roots blower housing 26, and place the limiting member 10 above the two impellers along the radial direction of the impellers. Rotate the impeller shaft so that the first impeller 24 lifts the limiting member 10 until both ends of the limiting member 10 are supported by the edges of the air hole.

[0034] C. By tightening the adjusting screw 14, the adjusting screw is pressed against the second impeller 25, so that the second impeller 25 cannot rotate in the same direction as the first impeller is restricted from rotating; at this time, the feeler gauge 23 is clamped between the two impellers;

[0035] D. The location of fixed gears, impeller shafts, and bearings;

[0036] E. Loosen the adjusting screw 14, remove the Roots blower impeller clearance adjustment tooling, and take out the feeler gauge 23.

[0037] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. The Roots blower impeller clearance adjustment tool is characterized by: It includes a limiting member that can extend into the air hole of the Roots blower housing, and the length of the limiting member is greater than the diameter of the air hole; the lower end of the limiting member is provided with a limiting portion for limiting the rotation of the first impeller, and the limiting member is provided with an adjusting screw for supporting and limiting the rotation of the second impeller, and the direction in which the second impeller is restricted from rotating is the same as the direction in which the first impeller is restricted from rotating.

2. The Roots blower impeller clearance adjustment tool according to claim 1, characterized in that: The upper surface of the limiting member is provided with at least one step matched with the air hole of the Roots blower housing.

3. The Roots blower impeller clearance adjustment tool according to claim 1, characterized in that: The limiting member is provided with an oblique screw hole, and the adjusting screw is installed in the oblique screw hole.

4. The Roots blower impeller clearance adjustment tool according to claim 3, characterized in that: The limiting member is provided with a V-shaped section, and the oblique screw hole is provided at the V-shaped section.

5. The Roots blower impeller clearance adjustment tool according to claim 1, characterized in that: The height of the limiting member is greater than the minimum gap between the first impeller and the air hole.

6. The Roots blower impeller clearance adjustment tool according to claim 1, characterized in that: Both ends of the limiter are provided with inner inclined edges to prevent collision with the impeller.

7. The adjustment method of the Roots blower impeller clearance adjustment tool is characterized in that: The following steps are involved: A. Install the two impellers, bearings and gears first, adjust the positions of the two impellers in advance, and insert the feeler gauge into the gap between the two impellers; B. Put the Roots blower impeller gap adjustment tool as claimed in any one of claims 1 to 6 into the position of the air hole in the Roots blower housing, and the Roots blower impeller gap adjustment tool is arranged above the two impellers along the radial direction of the impellers, and the impeller shaft is rotated so that the first impeller lifts the Roots blower impeller gap adjustment tool until both ends of the Roots blower impeller gap adjustment tool are supported by the edges of the air hole; C. Tighten the adjusting screw so that it presses against the second impeller, so that the second impeller cannot rotate in the same direction as the first impeller is restricted from rotating; at this time, the feeler gauge is clamped between the two impellers; D. The location of fixed gears, impeller shafts, and bearings; E. Loosen the adjusting screw, remove the Roots blower impeller clearance adjustment tooling, and take out the feeler gauge.

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