Impeller assembly structure of vertical direct-drive compressor

Abstract

The utility model discloses an impeller assembly structure of a vertical direct-drive compressor, which enables an impeller to be reliably assembled on an output shaft of a motor in a centering manner and is convenient to disassemble and assemble. The device comprises a motor which is provided with a protruding motor output shaft, and the outer end face of the tail end installation end of the motor output shaft is provided with a protruding stud; the impeller comprises a central connecting sleeve and a peripheral impeller, and the aperture of a central hole of the central connecting sleeve is larger than the diameter of the tail end mounting end of the motor output shaft; a rotation stopping pin; the taper sleeve comprises a mounting ring plate and a taper closing sleeve, the taper closing sleeve comprises an inner ring surface and a first taper surface, and the outer part of the first taper surface is flaring the mounting ring plate from inside to outside; a locking nut; and the spring chuck comprises a first connecting sleeve, a second connecting sleeve and a connecting ring.

Description

Technical Field

[0001] This utility model relates to the field of integrated circuit packaging, specifically to an impeller assembly structure for a vertical direct-drive compressor. Background Technology

[0002] Existing vertical direct-drive compressors all use a key to connect the impeller to the motor output shaft. When the fit between the impeller and the motor output shaft is loose, it affects the centering accuracy and causes impact on the key during operation, which can easily damage the key over time. When the fit between the impeller and the shaft is tight, the assembly and disassembly of the impeller are time-consuming and laborious. Therefore, there is an urgent need to develop an impeller assembly mechanism that can reliably center the impeller and is easy to assemble and disassemble. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides an impeller assembly structure for a vertical direct-drive compressor, which reliably centers and assembles the impeller onto the motor output shaft, and facilitates easy assembly and disassembly.

[0004] An impeller assembly structure for a vertical direct-drive compressor, characterized in that it comprises:

[0005] An electric motor having a protruding motor output shaft, wherein a protruding stud is provided on the outer end face of the end mounting end of the motor output shaft.

[0006] An impeller, comprising a central connecting sleeve and an outer peripheral impeller, wherein the diameter of the central hole of the central connecting sleeve is larger than the diameter of the end mounting end of the motor output shaft;

[0007] Stop selling;

[0008] A conical sleeve includes a mounting ring plate and a conical constricting sleeve, wherein the conical constricting sleeve includes an inner ring surface and an outer first conical surface that expands outward from the inside to the mounting ring plate;

[0009] Tighten the nut;

[0010] The first connecting sleeve has an inner ring surface that is a second conical surface that narrows from the inside out along the axial direction, and the second connecting sleeve has an inner ring surface that is a third conical surface that widens from the inside out along the axial direction. The outer end face of the first connecting sleeve is connected to the inner end face of the second connecting sleeve through the connecting ring.

[0011] After the motor output shaft passes through the corresponding hole in the mounting plate, its end mounting end protrudes outward from the mounting plate. A bushing is fitted on the end stop step of the motor output shaft. A radially penetrating anti-rotation pin is inserted into the end mounting end. The two ends of the anti-rotation pin protrude outward from the outer circumference of the end mounting end. The inner circumference of the tapered sleeve is provided with concave guide grooves corresponding to the protruding ends of the anti-rotation pin. The concave guide grooves extend axially. The tapered sleeve is fitted onto the end mounting end, and the mounting ring plate portion of the tapered sleeve is located within the axial region of the stud. The spring collet is fitted onto the outer circumference of the end mounting end, and the outer rings of the first connecting sleeve and the second connecting sleeve of the spring collet are arranged close to the inner wall of the central connecting sleeve. The locking nut is threadedly fitted onto the stud. The locking nut is close to the outer surface of the mounting ring plate. When the locking nut is tightened, the first tapered surface is close to the third tapered surface, and the second tapered surface is close to the inner tapered surface of the end mounting end.

[0012] Its further features are:

[0013] The outer end of the bushing is provided with a stop plate, and the inner end of the central connecting sleeve is arranged close to the stop plate to ensure a stable and reliable connection.

[0014] It also includes a disassembly plate, which is sleeved on the outer periphery of the locking nut. The outer ring of the disassembly plate is provided with a locking hole. The mounting ring plate is also provided with a number of locking screw holes. The fastening screw passes through the locking hole and is locked in the locking screw hole. When the locking nut is axially disengaged from the screw, it drives the disassembly plate to disengage, and then drives the tapered sleeve to disengage from the motor output shaft, thus completing the disassembly operation.

[0015] The locking nut has a stop ring integrated at its axial inner end. The inner cavity of the disassembly plate is fitted onto the stop ring to form a linkage mechanism, ensuring that the disassembly plate moves axially outward synchronously when the locking nut is axially disengaged from the screw.

[0016] Considering the impeller's rotation direction, to prevent the locking nut from loosening, the thread connecting the locking nut and the motor output shaft screw is a left-hand thread.

[0017] With the structure of this utility model, tightening the locking nut pushes the tapered sleeve axially inward. Due to the presence of the anti-rotation pin, the tapered sleeve does not rotate relative to the motor output shaft. The first tapered surface of the tapered sleeve and the third tapered surface of the spring collet cooperate. In addition, the second tapered surface of the spring collet and the inner end tapered surface of the motor output shaft also cooperate. The spring collet will evenly tighten the impeller, achieving good centering accuracy while facilitating assembly. When disassembly is required, simply remove the locking nut and then the tapered sleeve to complete the disassembly operation. This ensures that the impeller is reliably and centrally assembled on the motor output shaft, and is easy to assemble and disassemble. Attached Figure Description

[0018] Figure 1 This is a front sectional view of the present invention;

[0019] Figure 2 This is a partial enlarged view of point A of this utility model;

[0020] The names corresponding to the serial numbers in the diagram are as follows:

[0021] Motor 10, motor output shaft 11, end mounting end 111, inner end conical surface 112, stud 12, impeller 20, center connecting sleeve 21, outer peripheral impeller 22, anti-rotation pin 30, conical sleeve 40, mounting ring plate 41, conical closing sleeve 42, inner ring surface 421, first conical surface 422, concave guide groove 423, locking screw hole 43, locking nut 50, stop ring 51, spring collet 60, first connecting sleeve 61, second conical surface 611, second connecting sleeve 62, third conical surface 621, connecting ring 63, disassembly plate 70, locking hole 71, mounting plate 80, shaft sleeve 90, stop plate 91, fastening screw 100. Detailed Implementation

[0022] An impeller assembly structure for a vertical direct-drive compressor, see... Figure 1 , Figure 2 It includes a motor 10, an impeller 20, an anti-rotation pin 30, a cone sleeve 40, a locking nut 50, a spring collet 60, and a disassembly plate 70;

[0023] The motor 10 is provided with a protruding motor output shaft 11, and a protruding stud 12 is provided on the outer end face of the end mounting end 111 of the motor output shaft 11.

[0024] The impeller 20 includes a central connecting sleeve 21 and an outer peripheral impeller 22. The diameter of the central hole of the central connecting sleeve 21 is larger than the diameter of the end mounting end 111 of the motor output shaft 11.

[0025] The conical sleeve 40 includes a mounting ring plate 41 and a conical constricting sleeve 42. The conical constricting sleeve 42 includes an inner ring surface 421 and an outer first conical surface 422 that expands outward from the inside to the mounting ring plate.

[0026] The spring collet 60 includes a first connecting sleeve 61, a second connecting sleeve 62, and a connecting ring 63. The inner ring surface of the first connecting sleeve 61 is a second conical surface 611 that narrows from the inside to the outside along the axial direction. The inner ring surface of the second connecting sleeve 62 is a third conical surface 621 that widens from the inside to the outside along the axial direction. The axial outer end face of the first connecting sleeve 61 is connected to the axial inner end face of the second connecting sleeve 62 through the connecting ring 63.

[0027] After the motor output shaft 11 passes through the corresponding hole in the mounting plate 80, its end mounting end 111 protrudes outward from the mounting plate 80. A bushing 90 is fitted on the end stop step of the motor output shaft. A radially penetrating anti-rotation pin 30 is inserted into the end mounting end 111. The two ends of the anti-rotation pin 30 protrude outward from the outer circumference of the end mounting end 111. The inner ring surface 421 of the tapered sleeve 42 is provided with concave guide grooves 423 corresponding to the protruding ends of the anti-rotation pin. The concave guide grooves 423 extend axially. The tapered sleeve 40 is fitted onto the end mounting end 111, and... The mounting ring plate 41 of the tapered sleeve 40 is located in the axial region of the stud 12. The spring collet 60 is sleeved on the outer circumference of the end mounting end 111, and the outer rings of the first connecting sleeve 61 and the second connecting sleeve 62 of the spring collet 60 are arranged close to the inner wall of the central connecting sleeve 21. The locking nut 50 is threadedly sleeved on the stud 12 and close to the outer surface of the mounting ring plate 41. When the locking nut 50 is tightened, the first tapered surface 422 is close to the third tapered surface 621, and the second tapered surface 611 is close to the inner tapered surface 112 of the end mounting end 111.

[0028] The disassembly plate 70 is sleeved on the outer periphery of the locking nut 50. The outer ring of the disassembly plate 70 is provided with a locking hole 71. The mounting ring plate 41 is also provided with several locking screw holes 43. The fastening screw 100 passes through the locking hole 71 and is locked in the locking screw hole 43. When the locking nut 50 is axially disengaged from the screw 12, it drives the disassembly plate 70 to disengage, and then drives the tapered sleeve 40 to disengage from the motor output shaft 11, thus completing the disassembly operation.

[0029] In a specific embodiment, a stop ring 51 is integrated at the axial inner end of the locking nut 50. The inner cavity of the disassembly plate 70 is fitted with the stop ring 51 and the mounting ring plate 41 to form a linkage mechanism, ensuring that when the locking nut 50 is axially disengaged from the screw 12, it drives the disassembly plate 70 to move axially outward synchronously.

[0030] In practice, a stop plate 91 is provided at the outer end of the bushing 90, and the inner end of the central connecting sleeve 21 is arranged close to the stop plate 91 to ensure a stable and reliable connection.

[0031] Considering the rotation direction of the impeller 20, in order to prevent the locking nut 50 from loosening, the locking nut 50 and the screw 12 of the motor output shaft are fitted with left-hand threads.

[0032] Its working principle is as follows: Tightening the locking nut pushes the tapered sleeve axially inward. Due to the presence of the anti-rotation pin, the tapered sleeve does not rotate relative to the motor output shaft. The first tapered surface of the tapered sleeve and the third tapered surface of the spring collet cooperate. In addition, the second tapered surface of the spring collet and the inner end tapered surface of the motor output shaft also cooperate. The spring collet will evenly tighten the impeller, achieving good centering accuracy while facilitating assembly. When disassembly is required, remove the locking nut and then tighten the locking nut at the same time to drive the disassembly plate and the tapered sleeve to disengage from the screw, completing the disassembly operation.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An impeller assembly structure for a vertical direct-drive compressor, characterized in that, It includes: An electric motor having a protruding motor output shaft, wherein a protruding stud is provided on the outer end face of the end mounting end of the motor output shaft. An impeller, comprising a central connecting sleeve and an outer peripheral impeller, wherein the diameter of the central hole of the central connecting sleeve is larger than the diameter of the end mounting end of the motor output shaft; Stop selling; A conical sleeve includes a mounting ring plate and a conical constricting sleeve, wherein the conical constricting sleeve includes an inner ring surface and an outer first conical surface that expands outward from the inside to the mounting ring plate; Tighten the nut; The first connecting sleeve has an inner ring surface that is a second conical surface that narrows from the inside out along the axial direction, and the second connecting sleeve has an inner ring surface that is a third conical surface that widens from the inside out along the axial direction. The outer end face of the first connecting sleeve is connected to the inner end face of the second connecting sleeve through the connecting ring. After the motor output shaft passes through the corresponding hole in the mounting plate, its end mounting end protrudes outward from the mounting plate. A bushing is fitted on the end stop step of the motor output shaft. A radially penetrating anti-rotation pin is inserted into the end mounting end. The two ends of the anti-rotation pin protrude outward from the outer circumference of the end mounting end. The inner circumference of the tapered sleeve is provided with concave guide grooves corresponding to the protruding ends of the anti-rotation pin. The concave guide grooves extend axially. The tapered sleeve is fitted onto the end mounting end, and the mounting ring plate portion of the tapered sleeve is located within the axial region of the stud. The spring collet is fitted onto the outer circumference of the end mounting end, and the outer rings of the first connecting sleeve and the second connecting sleeve of the spring collet are arranged close to the inner wall of the central connecting sleeve. The locking nut is threadedly fitted onto the stud. The locking nut is close to the outer surface of the mounting ring plate. When the locking nut is tightened, the first tapered surface is close to the third tapered surface, and the second tapered surface is close to the inner tapered surface of the end mounting end.

2. The impeller assembly structure of a vertical direct-drive compressor according to claim 1, characterized in that: The outer end of the bushing is provided with a stop plate, and the inner end of the central connecting sleeve is arranged close to the stop plate.

3. The impeller assembly structure of a vertical direct-drive compressor according to claim 1 or 2, characterized in that: It also includes a disassembly plate, which is sleeved on the outer periphery of the locking nut. The outer ring of the disassembly plate is provided with a locking hole. The mounting ring plate is also provided with a number of locking screw holes. The fastening screw passes through the locking hole and is locked in the locking screw hole. When the locking nut is axially disengaged from the screw, it drives the disassembly plate to disengage, and then drives the tapered sleeve to disengage from the motor output shaft.

4. The impeller assembly structure of a vertical direct-drive compressor according to claim 3, characterized in that: The locking nut has a stop ring integrated at its axial inner end, and the inner cavity of the disassembly plate is fitted onto the stop ring to form a linkage mechanism.

5. The impeller assembly structure of a vertical direct-drive compressor according to claim 1, characterized in that: The locking nut and the motor output shaft screw have a left-hand thread.

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