A large detachable bucket wheel

Abstract

The present invention discloses a large detachable bucket impeller, which relates to the technical field of bucket impellers, including a rotating shaft, a wheel hub mounted on the rotating shaft, a plurality of bucket blocks mounted on the circumferential side wall of the wheel hub, the bucket block consisting of a bucket and a unit semi-ring block, the outer walls of the unit semi-ring blocks of the bucket block are mutually attached to form an annular bucket group, the unit semi-ring blocks on the bucket block and the wheel hub are fixedly connected with anti-loosening bolts, the side walls of the unit semi-ring blocks of the bucket block are provided with threaded semi-grooves, and the threaded semi-grooves on the outer walls of two adjacent unit semi-ring blocks form an integral threaded circular groove. During use, when the bucket of a bucket block needs to be repaired after severe wear, the unit semi-ring blocks of the worn bucket block can be removed after shutdown and replaced with new bucket blocks, which can greatly simplify the repair process compared to the repair process of an integral impeller.

Description

Technical Field

[0001] The invention relates to the technical field of bucket rotors, and in particular to a large-scale detachable bucket rotor. Background Art

[0002] The Pelton runner is the core component of the impulse turbine generator set and is also the key to converting the potential energy and kinetic energy of water into mechanical energy. The existing Pelton runners of the impulse turbine are all one-piece integral runners, that is, the bucket and the hub of the entire runner are cast as one piece and cannot be separated from each other. Such a runner structure is relatively complex, and defective products are prone to appear during the casting process. Moreover, a defect in the bucket may affect the quality of the entire runner and become a defective product, causing great losses.

[0003] When a bucket is worn and needs to be repaired, the integral impeller needs to shut down the equipment for repair. The bucket impeller is continuously impacted by the water flow and vibrates greatly, so the connecting bolts between the impeller bucket and the hub are easy to loosen. Therefore, we disclose a large detachable bucket impeller to solve the above problems. Summary of the invention

[0004] The purpose of the present application is to provide a large detachable bucket impeller to solve the problem mentioned in the above background technology that the impeller is difficult to maintain and is prone to loosening.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a large detachable bucket impeller, comprising a rotating shaft, a hub is installed on the rotating shaft, and a plurality of bucket blocks are installed on the circumferential side wall of the hub, the bucket block is composed of a bucket and a unit semi-ring block, the outer walls of the unit semi-ring blocks of the bucket block are adhered to each other to form an annular bucket group, and anti-loosening bolts are fixedly connected between the unit semi-ring blocks on the bucket block and the hub.

[0006] Based on the above structure, by setting up multiple water bucket blocks, it is convenient to install on the circumferential outer wall of the hub. The multiple water bucket blocks form an annular water bucket group. The water bucket blocks and the hub can be disassembled and thus can be transported separately, which greatly reduces the mass and volume of the impeller. During use, when the water bucket of a water bucket block becomes severely worn and needs to be repaired, the unit semi-ring block of the worn water bucket block can be removed after shutdown and replaced with a new water bucket block. Compared with the integral impeller repair process, the repair process can be greatly simplified, that is, time is saved. In addition, the anti-loosening bolts can prevent the water bucket block from loosening under the impact of water flow, thereby improving the connection strength between the water bucket block and the hub.

[0007] Preferably, a threaded half groove is provided on the side wall of the unit half ring block of the water bucket block, and the threaded half grooves on the outer walls of two adjacent unit half ring blocks form an integral threaded circular groove, and a positioning screw is inserted in the threaded circular groove.

[0008] Furthermore, by providing positioning screws, the connection strength between the unit semi-ring blocks on two adjacent water bucket blocks can be increased, and the position limiting work between the two adjacent water bucket blocks can be performed.

[0009] Preferably, the anti-loosening bolt comprises a bolt and a nut, one end of the bolt is provided with a first external thread, the nut thread is sleeved on the first external thread, and a reverse locking mechanism is sleeved on the circumferential outer wall of the nut.

[0010] Furthermore, by providing bolts and nuts, the bucket block and the wheel hub can be fixedly connected together, which facilitates the removal and installation of the bucket block, and the reverse locking mechanism can prevent the nut from loosening.

[0011] Preferably, the reverse locking mechanism comprises a left-handed threaded nut, an internal thread is provided in the left-handed threaded nut, and a second external thread corresponding to the internal thread is provided on the outer wall of the nut.

[0012] Furthermore, by setting the left-handed threaded nut, when impacted or vibrated, the bolt and the nut tend to loosen, but the rotation direction of the left-handed threaded nut is the tightening direction of the nut, thus preventing the nut from loosening and achieving the anti-loosening function.

[0013] Preferably, a plurality of arc surfaces distributed at intervals are provided on the outer wall of the nut, the outer side walls of the arc surfaces are fitted with the inner wall of the left-handed threaded nut, and the second external thread is opened on the outer side wall of the arc surfaces.

[0014] Furthermore, by providing the arc surface, the contact area between the nut and the left-handed threaded nut can be increased, the thread matching area can be increased, and the connection strength can be improved.

[0015] Preferably, a left-handed externally threaded gasket is sleeved on one end of the bolt close to the nut, and the left-handed externally threaded gasket is located between the nut and the unit semicircular block of the bucket block.

[0016] Furthermore, the connection strength between structures is increased by setting a left-handed externally threaded gasket. The pitch of the left-handed externally threaded gasket may be the same as or different from the first external thread of the bolt. The pitch of the first external thread on different bolts may be changed by replacing the left-handed externally threaded gasket as needed.

[0017] Preferably, the rotating shaft is provided with a convex strip, a positioning sleeve is installed on the wheel hub, and the inner wall of the positioning sleeve is provided with a groove which forms a limiting fit with the convex strip.

[0018] Furthermore, by providing the convex strip, a limited snap fit can be formed with the groove in the positioning sleeve, so that the wheel hub is easily installed on the rotating shaft.

[0019] In summary, the technical effects and advantages of the present invention are as follows:

[0020] 1. In the present invention, by providing a plurality of bucket blocks, it is convenient for the staff to install them on the circumferential outer wall of the hub in sequence. The plurality of bucket blocks form an annular bucket group. The bucket blocks and the hub can be disassembled and thus can be transported separately, which greatly reduces the mass and volume of the runner. During use, when the bucket of a bucket block becomes severely worn and needs to be repaired, the unit semi-ring block of the worn bucket block can be removed after shutdown and replaced with a new bucket block. Compared with the integral runner repair process, the repair process can be greatly simplified, that is, time is saved.

[0021] 2. All water buckets are under stress, so they can withstand great forces and can be made into large water bucket wheels.

[0022] 3. It is convenient to replace the water bowl, and the material requirements for the water bowl are lower, saving costs.

[0023] 4. In the present invention, by setting the left-handed threaded nut, when impacted or vibrated, the bolt and the nut tend to loosen, but the rotation direction of the left-handed threaded nut is the tightening direction of the nut, thus preventing the nut from loosening and achieving the anti-loosening function. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a schematic diagram of the main structure of a large detachable bucket runner in this embodiment;

[0026] Figure 2 for Figure 1 The enlarged structural diagram at A in the middle;

[0027] Figure 3 The explosion intention of the bolt in this embodiment;

[0028] Figure 4 It is a schematic diagram of the structure of the bolt assembly in this embodiment.

[0029] In the figure: 1, wheel hub; 2, bucket block; 3, positioning sleeve; 4, convex strip; 5, rotating shaft; 6, positioning screw; 7, bolt; 8, left-handed external thread gasket; 9, nut; 10, left-handed threaded nut; 11, first external thread; 12, arc surface; 13, second external thread; 14, internal thread. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Example: Reference Figure 1-4 A large detachable bucket impeller shown includes a rotating shaft 5, a hub 1 is mounted on the rotating shaft 5, and a plurality of bucket blocks 2 are mounted on the circumferential side wall of the hub 1. The bucket block 2 is composed of a bucket and a unit semi-ring block. The bucket block 2 can be any type of impeller fan blade in the prior art.

[0032] The outer walls of the unit semi-ring blocks of the water bucket block 2 are attached to each other to form an annular water bucket group, and the unit semi-ring blocks on the water bucket block 2 and the wheel hub 1 are fixedly connected with anti-loosening bolts.

[0033] Based on the above structure, by setting up multiple water bucket blocks 2, it is convenient to install on the circumferential outer wall of the hub 1. Multiple water bucket blocks 2 form an annular water bucket group. The water bucket block 2 and the hub 1 can be disassembled and thus can be transported separately, which greatly reduces the mass and volume of the impeller. During use, when the water bucket of a water bucket block 2 becomes severely worn and needs to be repaired, the unit semi-ring block of the worn water bucket block 2 can be removed after shutdown and replaced with a new water bucket block 2. Compared with the integral impeller repair process, the repair process can be greatly simplified, that is, time is saved. In addition, the anti-loosening bolts can prevent the water bucket block 2 from loosening under the impact of water flow, thereby improving the connection strength between the water bucket block 2 and the hub 1.

[0034] In this embodiment, Figure 2 As shown, a threaded half groove is provided on the side wall of the unit semi-ring block of the water bucket block 2, and the threaded half grooves on the outer walls of the two adjacent unit semi-ring blocks form an integral threaded circular groove, in which a positioning screw 6 is inserted. By setting the positioning screw 6, the connection strength between the unit semi-ring blocks on the two adjacent water bucket blocks 2 can be increased, and the position limiting work between the two adjacent water bucket blocks 2 can be performed.

[0035] In this embodiment, Figure 1 As shown, the anti-loosening bolt includes a bolt 7 and a nut 9. A first external thread 11 is formed at one end of the bolt 7. The nut 9 is threadedly sleeved on the first external thread 11. A reverse locking mechanism is sleeved on the circumferential outer wall of the nut 9. By arranging the bolt 7 and the nut 9, the bucket block 2 and the wheel hub 1 can be fixedly connected together, which is convenient for dismantling and installing the bucket block 2. The reverse locking mechanism can prevent the nut 9 from loosening.

[0036] In this embodiment, Figure 3 As shown, the reverse locking mechanism includes a left-handed threaded nut 10, in which an internal thread 14 is provided, and a second external thread 13 corresponding to the internal thread 14 is provided on the outer wall of the nut 9. When the left-handed threaded nut 10 is impacted or vibrated, the bolt 7 and the nut 9 tend to loosen, but the rotation direction of the left-handed threaded nut 10 is the tightening direction of the nut 9, thereby preventing the nut 9 from loosening and preventing the nut 9 from loosening to achieve the anti-loosening function.

[0037] In this embodiment, Figure 3 As shown, a plurality of spaced arc surfaces 12 are provided on the outer wall of the nut 9, the outer wall of the arc surface 12 is fitted with the inner wall of the left-handed threaded nut 10, and the second external thread 13 is provided on the outer wall of the arc surface 12. By providing the arc surface 12, the contact area between the nut 9 and the left-handed threaded nut 10 can be increased, the thread matching area can be increased, and the connection strength can be improved.

[0038] In this embodiment, Figure 3 and Figure 4 As shown, a left-handed externally threaded gasket 8 is sleeved on one end of the bolt 7 close to the nut 9, and the left-handed externally threaded gasket 8 is located between the nut 9 and the unit semicircular block of the bucket block 2. The connection strength between the structures is increased by arranging the left-handed externally threaded gasket 8. The pitch of the left-handed externally threaded gasket 8 may be the same as or different from the first external thread 11 of the bolt 7. The pitch of the first external thread 11 on different bolts 7 may be changed by replacing the left-handed externally threaded gasket 8 as needed.

[0039] In this embodiment, Figure 1 As shown, a convex strip 4 is provided on the rotating shaft 5, a positioning sleeve 3 is installed on the wheel hub 1, and a groove is provided on the inner wall of the positioning sleeve 3 to form a limiting fit with the convex strip 4. By setting the convex strip 4, a limiting snap-fit ​​fit can be formed with the groove in the positioning sleeve 3, which facilitates the installation of the wheel hub 1 on the rotating shaft 5.

[0040] How this utility works:

[0041] By providing multiple water bucket blocks 2, it is convenient for the staff to install them on the circumferential outer wall of the hub 1 in sequence. The multiple water bucket blocks 2 form an annular water bucket group. The water bucket block 2 and the hub 1 can be disassembled. When the water bucket of a water bucket block 2 is severely worn and needs to be repaired, the unit half ring block of the worn water bucket block 2 can be removed after shutdown and replaced with a new water bucket block 2. In addition, the anti-loosening bolts can prevent the water bucket block 2 from loosening under the impact of water flow, thereby improving the connection strength between the water bucket block 2 and the hub 1.

[0042] By setting the positioning screw 6, the connection strength between the unit semi-ring blocks on the two adjacent water bucket blocks 2 can be increased, and the two adjacent water bucket blocks 2 can be limited. The bolts 7 and nuts 9 fix the water bucket block 2 and the wheel hub 1 together, which is convenient for the removal and installation of the water bucket block 2. The reverse locking mechanism prevents the nut 9 from loosening.

[0043] Among them, when the left-handed threaded nut 10 is impacted or vibrated, the bolt 7 and the nut 9 tend to loosen, but the rotation direction of the left-handed threaded nut 10 is the tightening direction of the nut 9, which prevents the loosening tendency of the nut 9 and prevents the nut 9 from loosening, thereby achieving the anti-loosening function.

[0044] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A large detachable bucket impeller, comprising a rotating shaft (5), on which a hub (1) is mounted, characterized in that: A plurality of water bucket blocks (2) are mounted on the circumferential side wall of the wheel hub (1), the water bucket block (2) being composed of a water bucket and a unit semi-ring block, the outer walls of the unit semi-ring blocks of the water bucket block (2) being attached to each other to form an annular water bucket group, and anti-loosening bolts are fixedly connected between the unit semi-ring blocks on the water bucket block (2) and the wheel hub (1); The anti-loosening bolt comprises a bolt (7) and a nut (9); one end of the bolt (7) is provided with a first external thread (11); the nut (9) is threadedly sleeved on the first external thread (11); and a reverse locking mechanism is sleeved on the circumferential outer wall of the nut (9); The reverse locking mechanism comprises a left-handed threaded nut (10), an internal thread (14) is provided in the left-handed threaded nut (10), and a second external thread (13) corresponding to the internal thread (14) is provided on the outer wall of the nut (9); The outer wall of the nut (9) is provided with a plurality of arc surfaces (12) distributed at intervals, the outer wall of the arc surface (12) is in contact with the inner wall of the left-handed threaded nut (10), and the second external thread (13) is provided on the outer wall of the arc surface (12); A threaded half groove is provided on the side wall of the unit half ring block of the water bucket block (2), and the threaded half grooves on the outer walls of two adjacent unit half ring blocks form an integral threaded circular groove, and a positioning screw (6) is inserted into the threaded circular groove; A left-handed externally threaded gasket (8) is sleeved on one end of the bolt (7) close to the nut (9), and the left-handed externally threaded gasket (8) is located between the nut (9) and the unit semicircular block of the water bucket block (2).

2. A large detachable bucket wheel according to claim 1, characterized in that: The rotating shaft (5) is provided with a convex strip (4), the wheel hub (1) is provided with a positioning sleeve (3), and the inner wall of the positioning sleeve (3) is provided with a groove which forms a limiting fit with the convex strip (4).

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