Magnetic suspension horizontal type single-stage centrifugal blower

Abstract

The utility model discloses a magnetic suspension horizontal type single-stage centrifugal blower which comprises a main body, volutes are arranged on the two sides of the main body, rotating shafts are arranged on the surfaces of the inner sides of the volutes and penetrate through suspension bearings, each suspension bearing comprises a rotating shaft sleeve, and annular protrusions are arranged on the two sides of each rotating shaft sleeve. The outer surfaces of the two sides of the rotating shaft sleeve are fixedly sleeved with bearings, the outer surfaces of the bearings are sleeved with concave ring covers, two semicircular clamping blocks are clamped and fixed to the inner ends of the concave ring covers, first permanent magnet rings are arranged on the inner side surfaces of the semicircular clamping blocks, and second permanent magnet rings are arranged on the inner side surfaces of annular protrusions of the rotating shaft sleeve. By adopting the three-section magnetic suspension structure and the bilateral symmetry design, the rotating shaft sleeve rotates in the concave ring cover and the semicircular clamping block, balance is kept, the balance is improved, the three-section structure is fixed through the bolt and the locking sleeve during installation, clamping and installation are convenient, and the installation mechanism is simple.

Description

Technical Field

[0001] The utility model relates to the field of magnetic suspension horizontal single-stage centrifugal blowers, and more specifically to a magnetic suspension horizontal single-stage centrifugal blower. Background Art

[0002] The research on passive permanent magnetic bearings was much earlier than that on active magnetic bearings. However, due to the performance of magnetic materials, the suspension force generated by permanent magnetic bearings was small, which limited its application range. People turned to the research on active electromagnetic bearings. However, active magnetic bearings require additional control systems, consume a lot of energy, and are large in size. Therefore, the research on permanent magnetic bearings has not been interrupted. In 1968, the research on samarium cobalt permanent magnets was successful, and then a series of high-performance rare earth permanent magnetic materials were quickly commercialized, which made the research on permanent magnetic bearings active again. Among them, NdFeB permanent magnetic materials can absorb heavy objects equivalent to 640 times their own weight. Bearings made of this permanent magnetic material make it possible for permanent magnetic bearings to develop in the direction of miniaturization and lightness. In addition, permanent magnetic bearings can also be used in combination with other bearings, such as electromagnetic bearings, mechanical bearings, air bearings, superconductor magnetic bearings, etc., to form various forms of magnetic bearing systems, which have very broad development prospects;

[0003] The passive magnetic bearing system can provide non-mechanical contact support force, without mechanical friction, completely eliminating the bearing heating and lubrication pollution problems caused by it, making it suitable for high-speed rotation occasions, and the support force of the passive magnetic bearing is controllable within a certain range, and the auxiliary control of the vibration and stability of the rotor system can be achieved by controlling the size of the magnetic ring and the type of combined structure. Applying passive magnetic bearings to horizontal centrifugal blowers can not only greatly improve the operating efficiency of the machine, but also the non-contact magnetic bearings can effectively reduce the energy consumption during operation. At the same time, the stability of the passive magnetic bearing system makes the motor more stable during operation, longer life, and safer when crossing the critical speed;

[0004] In the prior art, such as the application publication number CN117108546A, the present invention discloses a permanent magnetic suspension horizontal two-stage centrifugal blower, which is composed of a volute, a turbine, a motor main shaft, a motor rotor, a motor stator, a radial-axial permanent magnetic suspension bearing, etc., and the radial-axial permanent magnetic suspension bearing is composed of an outer ring end cover, a protective magnetic bearing seat, a protective ring, an inner ring rotor, an auxiliary bearing, an inner hexagonal cylindrical head screw, an outer ring axial left end permanent magnetic stator seat, an outer ring axial right end permanent magnetic stator seat, an outer ring radial permanent magnetic stator seat, a radial upper permanent magnetic outer half ring, a radial rotor permanent magnetic inner ring, a permanent magnet protection ring, a radial lower permanent magnetic outer half ring, an axial stator permanent magnetic ring, an axial rotor permanent magnetic ring and a series of parts. The present invention innovatively integrates radial and axial permanent magnetic suspension bearings into a radial-axial integrated permanent magnetic suspension bearing, realizes the upgrading of bearings and main machines, and can withstand unidirectional radial loads Wr and bidirectional axial loads +Wa and -Wa, has a long service life, is pollution-free, and meets the dual-carbon requirements;

[0005] The permanent magnetic bearing structure in the above-mentioned patent is relatively complex, and its assembly is cumbersome and complicated, and it is inconvenient to install. In addition, the permanent magnetic bearing structure is an eccentric structure, and its shaft balance is poor when the shaft rotates at high speed. Utility Model Content

[0006] In view of the problems existing in the prior art, the purpose of the utility model is to provide a magnetically suspended horizontal single-stage centrifugal blower. By adopting a three-stage magnetic suspension structure, it has a bilaterally symmetrical design, and its rotating shaft sleeve rotates in a concave ring cover and a semicircular block to maintain balance and improve balance. During installation, bolts and locking sleeves are used to fix the three-stage structure, and the clamping installation is convenient and the installation mechanism is simple.

[0007] To solve the above problems, the utility model adopts the following technical solutions.

[0008] A magnetically suspended horizontal single-stage centrifugal blower, comprising a main body, volutes are arranged on both sides of the main body, a rotating shaft is arranged on the inner surface of the volute, the rotating shaft is inserted in a suspension bearing, the suspension bearing comprises a rotating sleeve, annular protrusions are arranged on both sides of the rotating sleeve, bearings are sleeved and fixed on the outer surfaces of both sides of the rotating sleeve, a concave ring cover is sleeved on the outer surface of the bearing, two groups of semicircular blocks are clamped and fixed on the inner end of the concave ring cover, a first permanent magnet ring is arranged on the inner surface of the semicircular block, and a second permanent magnet ring is arranged on the inner surface of the annular protrusion of the rotating sleeve The magnetic ring is provided with a third permanent magnetic ring on the inner end surface of the semicircular block, and a fourth permanent magnetic ring is provided on the outer surface of the rotating sleeve. The first permanent magnetic ring and the second permanent magnetic ring are close to each other, and the third permanent magnetic ring and the fourth permanent magnetic ring are close to each other. The concave ring cover and the semicircular block are fixedly connected by bolts and a locking sleeve. By adopting a three-stage magnetic suspension structure, it is symmetrically designed on the left and right. The rotating sleeve rotates in the concave ring cover and the semicircular block to maintain balance and improve balance. Bolts and locking sleeves are used to fix the three-stage structure during installation. The clamping and installation are convenient and the installation mechanism is simple.

[0009] Furthermore, the outer end surfaces of the concave ring cover and the semicircular block are provided with insertion holes, and the bolts are inserted through the insertion holes.

[0010] Furthermore, the inner surface of the locking sleeve is connected to the inner surface of the bolt through threads.

[0011] Furthermore, the outer end surface of the locking sleeve is provided with a hexagonal groove.

[0012] Furthermore, an annular cavity is arranged on the inner surface of the concave ring cover, and the outer end of the bearing is clamped on the inner surface of the annular cavity of the concave ring cover.

[0013] Furthermore, annular protrusions are provided on the outer surfaces of both sides of the rotating sleeve, and the inner end surface of the bearing rests against the inner side surface of the rotating sleeve.

[0014] Furthermore, the annular protrusions at the left and right ends of the rotating sleeve have the same diameter and thickness.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] (1) By adopting a three-stage magnetic suspension structure with a bilaterally symmetrical design, the rotating shaft sleeve rotates in the concave ring cover and the semicircular block to maintain balance and improve balance. During installation, bolts and locking sleeves are used to fix the three-stage structure, which is easy to clamp and install, and the installation mechanism is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2It is a cross-sectional view of the overall structure of the utility model;

[0019] Figure 3 This is a cross-sectional view of the suspension bearing of the utility model;

[0020] Figure 4 This is a view of the locking sleeve of the utility model;

[0021] Figure 5 It is a side view of the combined structure of two semicircular card blocks of the utility model.

[0022] Description of the numbers in the figure:

[0023] 1 main body, 2 volute, 3 rotating shaft, 4 suspension bearing, 100 annular protrusion, 40 rotating bearing, 41 bearing, 42 concave ring cover, 43 semicircular block, 44 first permanent magnetic ring, 45 second permanent magnetic ring, 46 third permanent magnetic ring, 47 fourth permanent magnetic ring, 5 bolts, 6 locking sleeve, 7 hexagonal groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example 1

[0026] See also Figure 1-4 A magnetic suspension horizontal single-stage centrifugal blower comprises a main body 1, volutes 2 are arranged on both sides of the main body 1, a rotating shaft 3 is arranged on the inner surface of the volute 2, the rotating shaft 3 is inserted in a suspension bearing 4, the suspension bearing 4 comprises a rotating sleeve 40, an annular protrusion 100 is arranged on both sides of the rotating sleeve 4, bearings 41 are sleeved and fixed on the outer surfaces of both sides of the rotating sleeve 40, a concave ring cover 42 is sleeved on the outer surface of the bearing 41, two groups of semicircular blocks 43 are clamped and fixed on the inner end of the concave ring cover 42, a first permanent magnet ring 44 is arranged on the inner surface of the semicircular block 43, and a second permanent magnet ring 44 is arranged on the inner surface of the annular protrusion 100 of the rotating sleeve 40 The inner end surfaces of the permanent magnet ring 45 and the semicircular clamping block 43 are provided with a third permanent magnet ring 46, and the outer surface of the rotating sleeve 40 is provided with a fourth permanent magnet ring 47. The first permanent magnet ring 44 and the second permanent magnet ring 45 are close to each other, and the third permanent magnet ring 46 and the fourth permanent magnet ring 47 are close to each other. The concave ring cover 42 and the semicircular clamping block 43 are fixedly connected by bolts 5 and locking sleeves 6. By adopting a three-stage magnetic suspension structure, the left-right symmetrical design allows the rotating sleeve to rotate in the concave ring cover and the semicircular clamping block to maintain balance and improve balance. The three-stage structure is fixed by bolts and locking sleeves during installation, which is convenient for clamping and installation, and the installation mechanism is simple.

[0027] The outer end surfaces of the concave ring cover 42 and the semicircular block 43 are provided with insertion holes, through which the bolts 5 are inserted, so as to facilitate insertion installation;

[0028] The inner surface of the locking sleeve 6 is connected to the inner surface of the bolt 5 by threads; it is convenient for locking installation, and it is embedded installation, and the two sides will not bulge, and will not hinder the installation;

[0029] The outer end surface of the locking sleeve 6 is provided with an inner hexagonal groove 7, which is convenient for a hexagonal wrench to be inserted into the inner hexagonal groove 7 and twisted, thereby facilitating assembly and disassembly operations;

[0030] The inner surface of the concave ring cover 42 is provided with an annular cavity, and the outer end of the bearing 41 is clamped on the inner surface of the annular cavity of the concave ring cover 42, so as to facilitate the support rotation;

[0031] Annular protrusions are arranged on the outer surfaces of both sides of the rotating sleeve 40, and the inner end surface of the bearing 41 abuts against the inner surface of the rotating sleeve 40; the annular protrusions 100 at the left and right ends of the rotating sleeve 40 have the same diameter and thickness, and the annular protrusions 100 at both ends rotate during rotation to maintain balance;

[0032] When it is used, a rotating shaft 3 is arranged through the inner surface of the volute 2, and the rotating shaft 3 is inserted in the suspension bearing 4. The suspension bearing 4 includes a rotating sleeve 40, annular protrusions 100 are arranged on both sides of the rotating sleeve 4, and bearings 41 are sleeved and fixed on the outer surfaces of both sides of the rotating sleeve 40. The rotating sleeve 40 is supported for rotation by the bearings 41 on both sides, and the outer surface of the bearing 41 is sleeved with a concave ring cover 42, and two groups of semicircular blocks 43 are clamped and fixed at the inner end of the concave ring cover 42. The inner surface of the semicircular block 43 is provided with a first permanent magnet ring 44, and the inner surface of the annular protrusion 100 of the rotating sleeve 40 is provided with a second permanent magnet ring 45. The inner end surface of the semicircular block 43 is provided with a third permanent magnet ring 46, and the outer surface of the rotating sleeve 40 is provided with a fourth permanent magnet ring 47. The first permanent magnet ring 44 and the second permanent magnet ring 45 are close to each other, and the third permanent magnet ring 46 and the fourth permanent magnet ring 47 are close to each other, and can be close to each other for magnetic suspension, which is convenient for supporting rotation.

[0033] The three-stage design keeps balance and stability when rotating, and is easy to install. The two semicircular clamping blocks 43 are engaged with each other to form a circular ring structure, which is installed outside the rotating shaft sleeve 40. During installation, insertion holes are provided through the outer end surfaces of the concave ring cover 42 and the semicircular clamping blocks 43, and the bolts 5 are inserted through the insertion holes, which is convenient for insertion installation. The inner surface of the locking sleeve 6 is connected to the inner surface of the bolt 5 through a thread, which is convenient for locking installation, and is embedded in the installation, so there are no protrusions on both sides, which does not hinder the installation, and the installation is convenient and simple.

[0034] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A magnetically suspended horizontal single-stage centrifugal blower, comprising a main body (1), characterized in that: The main body (1) is provided with a volute (2) on both sides, the inner surface of the volute (2) is provided with a rotating shaft (3), the rotating shaft (3) is inserted into a suspension bearing (4), the suspension bearing (4) comprises a rotating sleeve (40), annular protrusions (100) are provided on both sides of the rotating sleeve (40), bearings (41) are sleeved and fixed on the outer surfaces of both sides of the rotating sleeve (40), a concave ring cover (42) is sleeved and fixed on the outer surface of the bearing (41), two groups of semicircular blocks (43) are clamped and fixed at the inner end of the concave ring cover (42), and the inner surface of the semicircular block (43) is provided with a plurality of semicircular blocks (43). A first permanent magnet ring (44) is arranged on the surface, a second permanent magnet ring (45) is arranged on the inner surface of the annular protrusion (100) of the rotating sleeve (40), a third permanent magnet ring (46) is arranged on the inner end surface of the semicircular clamping block (43), and a fourth permanent magnet ring (47) is arranged on the outer surface of the rotating sleeve (40), the first permanent magnet ring (44) and the second permanent magnet ring (45) are close to each other, the third permanent magnet ring (46) and the fourth permanent magnet ring (47) are close to each other, and the concave ring cover (42) and the semicircular clamping block (43) are fixedly connected by bolts (5) and a locking sleeve (6).

2. The magnetically suspended horizontal single-stage centrifugal blower according to claim 1, characterized in that: The outer end surfaces of the concave ring cover (42) and the semicircular clamping block (43) are provided with insertion holes, and the bolts (5) are inserted through the insertion holes.

3. The magnetically suspended horizontal single-stage centrifugal blower according to claim 1, characterized in that: The inner surface of the locking sleeve (6) is connected to the inner surface of the bolt (5) via threads.

4. The magnetically suspended horizontal single-stage centrifugal blower according to claim 1, characterized in that: The outer end surface of the locking sleeve (6) is provided with a hexagonal groove (7).

5. The magnetically suspended horizontal single-stage centrifugal blower according to claim 1, characterized in that: An annular cavity is arranged on the inner surface of the concave ring cover (42), and the outer end of the bearing (41) is clamped on the inner surface of the annular cavity of the concave ring cover (42).

6. The magnetically suspended horizontal single-stage centrifugal blower according to claim 1, characterized in that: Annular protrusions are arranged on the outer surfaces of both sides of the rotating sleeve (40), and the inner end surface of the bearing (41) abuts against the inner side surface of the rotating sleeve (40).

7. The magnetically suspended horizontal single-stage centrifugal blower according to claim 1, characterized in that: The annular protrusions (100) at the left and right ends of the rotating sleeve (40) have the same diameter and thickness.

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