Fan structure for reciprocating compressor motor

Abstract

The utility model discloses a fan structure for a reciprocating compressor motor, which comprises a rotating shaft and a fan body fixed on the rotating shaft, the fan body comprises a fan sleeve and a fan blade assembly arranged in the circumferential direction of the fan sleeve, the rotating shaft is in interference fit with the fan sleeve, and the fan structure further comprises a fixing plate. And the fan is fixed at the end part of the rotating shaft and is fixedly connected with the fan sleeve. According to the fan structure for the reciprocating compressor motor, the strength of the fan can be improved, and the service life of the motor is further prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, and specifically relates to a fan structure for a reciprocating compressor motor. Background Technology

[0002] Reciprocating compressors are a type of positive displacement compressor. They rely on the periodic changes in the working volume of the cylinder to compress gas in order to increase the working pressure.

[0003] In existing technologies, such as Figure 1 As shown, the fan structure of the reciprocating compressor motor includes a rotating shaft 100 and a fan body 200 fixed on the rotating shaft 100. The fan body 200 includes a fan sleeve 201 and a fan blade assembly 202 disposed in the circumferential direction of the fan sleeve 201. The rotating shaft 100 and the fan sleeve 201 are interference-fitted. A shaft retaining ring 300 is provided at the end of the rotating shaft 100 to fix the fan sleeve 201 and the rotating shaft 100.

[0004] However, the periodic impacts on the motor of a reciprocating compressor can easily cause the shaft to loosen from the fan body or even the fan to break, ultimately leading to motor failure. Utility Model Content

[0005] The purpose of this invention is to provide a fan structure for a reciprocating compressor motor, which can improve the reliability of the fan structure.

[0006] Based on the above problems, the technical solution provided by this utility model is as follows:

[0007] A fan structure for a reciprocating compressor motor includes a rotating shaft and a fan body fixed on the rotating shaft. The fan body includes a fan sleeve and a fan blade assembly disposed around the fan sleeve. The rotating shaft is interference-fitted with the fan sleeve. The structure also includes a fixing plate, which is fixed to the end of the rotating shaft and fixedly connected to the fan sleeve.

[0008] In some embodiments, the fixing plate is fixed to the end of the rotating shaft by a bolt assembly.

[0009] In some embodiments, the bolt assembly includes two bolts arranged radially along the fixing plate.

[0010] In some embodiments, a retaining washer is provided between the bolt and the outer end face of the fixing plate.

[0011] In some embodiments, the mounting plate is welded to the fan sleeve.

[0012] In some embodiments, the fixing plate is disc-shaped, and the outer diameter of the fixing plate is larger than the end of the rotating shaft and smaller than the fan sleeve.

[0013] In some embodiments, the fan blade assembly includes a first ring plate, a second ring plate, and a third ring plate arranged in parallel at intervals. The first ring plate is fixed to the fan sleeve and a plurality of first fan blades are connected between it and the second ring plate. A plurality of second fan blades are connected between the second ring plate and the third ring plate.

[0014] In some embodiments, the plurality of first fan blades and the plurality of second fan blades are arranged at uniform intervals along the circumference of the fan sleeve, and the first fan blades and the second fan blades are arranged alternately.

[0015] In some embodiments, the second blade is disposed between two adjacent first blades and at an angle equal to that between the two first blades.

[0016] In some embodiments, the radial length of the second blade is smaller than that of the first blade.

[0017] Compared with the prior art, the advantages of this utility model are:

[0018] 1. By fixing a fixing plate to the end of the rotating shaft and fixing the fixing plate to the fan sleeve, the friction between the fixing plate and the end of the rotating shaft firmly fixes the fan, improving the reliability of the fan and thus increasing the service life of the motor.

[0019] 2. The fixing plate and the fan sleeve are welded together, that is, a gap is reserved between the fixing plate and the fan sleeve, which can reduce the shear force on the bolt assembly and improve the strength of the structure.

[0020] 3. The fan blade assembly includes three parallel and spaced ring plates, with multiple fan blades arranged between adjacent ring plates, which can increase the air volume of the fan and at the same time improve the mechanical strength of the fan. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a fan structure in the prior art;

[0023] Figure 2 This is a schematic diagram of an embodiment of the fan structure for a reciprocating compressor motor according to the present invention;

[0024] Figure 3 This is one of the structural schematic diagrams of the fan assembly in the embodiments of this utility model;

[0025] Figure 4 This is the second structural schematic diagram of the fan assembly in this utility model embodiment;

[0026] in:

[0027] 100, Shaft 200, Fan body 201, Fan sleeve 202, Fan blade assembly 300, Shaft retaining ring;

[0028] 1. Shaft

[0029] 2. Fan body; 2-1. Fan sleeve; 2-2. First ring plate; 2-3. Second ring plate; 2-4. Third ring plate; 2-5. First fan blade; 2-6. Second fan blade;

[0030] 3. Fixing plate; 3-1. Threaded hole;

[0031] 4. Bolts;

[0032] 5. Stop gasket. Detailed Implementation

[0033] The above solution will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrating the present invention and are not intended to limit the scope of the present invention. The implementation conditions used in the embodiments can be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are usually the conditions in conventional experiments.

[0034] like Figure 2 The diagram shown is a structural schematic of an embodiment of the present invention, which provides a fan structure for a reciprocating compressor motor, including a rotating shaft 1 and a fan body 2 fixed on the rotating shaft 1. The fan body 2 includes a fan sleeve 2-1 and a fan blade assembly disposed on the circumference of the fan sleeve 2-1. The rotating shaft 1 and the fan sleeve 2-1 are keyed and interference-fitted.

[0035] To improve the strength of the fan structure, a fixing plate 3 is also provided, which is fixed to the end of the rotating shaft 1 and fixedly connected to the fan sleeve 2-1.

[0036] In this example, the fixing plate 3 is disc-shaped, and the outer diameter of the fixing plate 3 is larger than the end of the rotating shaft 1 and smaller than the fan sleeve 2-1.

[0037] Specifically, the fixing plate 3 is fixed to the end of the rotating shaft 1 by a bolt assembly. Preferably, the bolt assembly includes two bolts 4 arranged radially along the fixing plate 3. To facilitate bolt connection, the fixing plate 3 is provided with through holes for the bolts 4 to pass through. To facilitate hoisting, the fixing plate 3 is also provided with two threaded holes 3-1 for fixing hoisting tools.

[0038] To improve the stability of the structure, a retaining washer 5 is provided between the bolt 4 and the outer end face of the fixing plate 3.

[0039] In this example, the fixing plate 3 is welded to the fan sleeve 2-1. During installation, the shaft 1 extends out of the fan sleeve 2-1, and a gap is reserved between the fan sleeve 2-1 and the fixing plate 3 to accommodate the solder. In this way, the shear force of the bolt assembly can be reduced and the strength of the structure can be improved by welding the fixing plate 3 to the fan sleeve 2-1.

[0040] like Figure 3 and Figure 4 As shown, the fan blade assembly includes a first ring plate 2-2, a second ring plate 2-3, and a third ring plate 2-4 arranged in parallel at intervals. The first ring plate 2-2 is fixed on the fan sleeve 2-1 and a plurality of first fan blades 2-5 are connected between it and the second ring plate 2-3. A plurality of second fan blades 2-6 are connected between the second ring plate 2-3 and the third ring plate 2-4. The plurality of first fan blades 2-5 and the plurality of second fan blades 2-6 are evenly spaced along the circumference of the fan sleeve 2-1, and the first fan blades and the second fan blades are arranged alternately.

[0041] Preferably, the number of first blades 2-5 and second blades 2-6 is equal. The second blade 2-6 is positioned between the two first blades 2-5 and the included angle between the second blade 2-6 and the two first blades 2-5 is equal. The radial length of the second blade 2-6 is less than that of the first blade 2-5. For example, if the number of first blades 2-5 and second blades 2-6 is n, then the included angle between the fan blades is 360 / 2n. In this way, the fan's air volume is increased while the mechanical strength of the fan is also increased.

[0042] In summary, this fan structure improves mechanical strength and fan airflow, making it suitable for reciprocating compressor motors.

[0043] The above examples are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A fan structure for a reciprocating compressor motor, comprising a rotating shaft and a fan body fixed on the rotating shaft, the fan body comprising a fan sleeve and a fan blade assembly disposed circumferentially on the fan sleeve, the rotating shaft and the fan sleeve being interference-fitted, characterized in that: It also includes a fixing plate, which is fixed to the end of the rotating shaft and fixedly connected to the fan sleeve; The fan blade assembly includes a first ring plate, a second ring plate, and a third ring plate arranged in parallel at intervals. The first ring plate is fixed on the fan sleeve and a plurality of first fan blades are connected between it and the second ring plate. A plurality of second fan blades are connected between the second ring plate and the third ring plate.

2. The fan structure for a reciprocating compressor motor according to claim 1, characterized in that: The fixing plate is fixed to the end of the rotating shaft by a bolt assembly.

3. The fan structure for a reciprocating compressor motor according to claim 2, characterized in that: The bolt assembly includes two bolts arranged radially along the fixing plate.

4. The fan structure for a reciprocating compressor motor according to claim 3, characterized in that: A retaining washer is provided between the bolt and the outer end face of the fixing plate.

5. The fan structure for a reciprocating compressor motor according to claim 3, characterized in that: The fixing plate is welded and fixed to the fan sleeve.

6. The fan structure for a reciprocating compressor motor according to claim 1, characterized in that: The fixing plate is disc-shaped, and its outer diameter is larger than the end of the rotating shaft but smaller than the fan sleeve.

7. The fan structure for a reciprocating compressor motor according to claim 1, characterized in that: The plurality of first fan blades and the plurality of second fan blades are arranged at uniform intervals along the circumference of the fan sleeve, and the first fan blades and the second fan blades are arranged alternately.

8. The fan structure for a reciprocating compressor motor according to claim 1, characterized in that: The second fan blade is positioned between two adjacent first fan blades and the angle between the second fan blade and the two first fan blades is equal.

9. The fan structure for a reciprocating compressor motor according to claim 1, characterized in that: The radial length of the second blade is less than that of the first blade.

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