Dustproof and damp-proof air suspension fan motor

Abstract

The utility model discloses a dustproof and moisture-proof air suspension fan motor which comprises a motor body and an air pressure balance mechanism arranged on the motor body. The air pressure balance mechanism comprises an air pressure balance accommodating shell fixed on the outer side wall of the motor shell, an air pressure balance cylinder is fixed in the air pressure balance accommodating shell, an air pressure balance piston is slidably connected in the air pressure balance cylinder, and the air pressure balance piston divides the air pressure balance cylinder into an air pressure balance chamber and an outer operation chamber; an air pressure balance through hole is formed in the motor shell and is communicated with the air pressure balance chamber through an air pressure balance communicating pipe; the air suspension fan motor has good sealing performance, and dust and moisture can be effectively prevented from entering the motor; the air pressure balance mechanism can adaptively adjust the internal and external pressure difference of the fan motor caused by the temperature difference change, so that the internal air pressure of the fan motor is always kept balanced with the external air pressure, and the external air containing dust or relatively high humidity is effectively prevented from entering the fan motor.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, concretely is a dustproof and moistureproof air suspension fan motor. BACKGROUND

[0002] Air suspension fan motor is usually high-speed motor, its working speed is very high, can reach per minute ten thousand revolution. This is because air suspension fan needs to produce enough air pressure and air volume to satisfy the ventilation or gas delivery demand of industrial field etc. It utilizes high-speed rotating impeller to work on air, and the high speed of motor helps to improve the efficiency of fan, for example, in the sewage treatment aeration process, air suspension fan driven by high-speed motor can quickly inject a large amount of air into sewage, improve the transmission efficiency of oxygen;

[0003] Due to the influence of fan motor's own working environment, air disturbance is relatively large, and the motor itself is easily affected by dust and moisture, and the dustproof and moistureproof aspects need to be further improved and optimized. UTILITY MODEL CONTENT

[0004] The utility model discloses a dustproof and moistureproof air suspension fan motor, which has excellent dustproof and moistureproof performance.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A dustproof and moistureproof air suspension fan motor, comprising a motor body, a gas pressure balancing mechanism arranged on the motor body, and a gas pressure balancing mechanism arranged on the motor body.

[0007] The motor body is composed of a motor shell, a motor stator fixed in the motor shell, a motor rotor rotatably connected in the motor shell, and a motor rotating shaft fixed on the motor rotor.

[0008] The gas pressure balancing mechanism comprises a gas pressure balancing containing shell fixed on the outer side wall of the motor shell, a gas pressure balancing cylinder fixed in the gas pressure balancing containing shell, a gas pressure balancing piston slidably connected in the gas pressure balancing cylinder, and a gas pressure balancing piston.

[0009] The motor shell has a gas pressure balancing through hole communicating inside and outside, and the gas pressure balancing through hole is connected with the gas pressure balancing chamber through a gas pressure balancing connecting pipe.

[0010] The gas pressure balancing cylinder has an external ambient pressure balancing hole communicating inside and outside at one end of the external operation chamber.

[0011] Preferably, a manual balancing pipe is fixed on the outer side of the gas pressure balancing cylinder and is connected with the gas pressure balancing chamber, and the manual balancing pipe is provided with a manual balancing control valve.

[0012] The air pressure balance piston has a manually adjustable connecting hole at one end of the outer operating chamber, a manually adjustable rod is fixedly connected in the manually adjustable connecting hole in a threaded manner, and the other end of the manually adjustable rod extends to the outside of the air pressure balance cylinder through the ambient air pressure balance hole.

[0013] Description: Turn on the manual balance control valve, and then manually drive the air pressure balance piston in the air pressure balance cylinder through the manually adjustable rod to keep the air pressure balance piston in the middle position in the air pressure balance cylinder, so as to avoid the air pressure balance piston being in the top or top-bottom limit position in the air pressure balance cylinder and losing the air pressure balance effect.

[0014] Preferably, the motor housing has a rotating shaft connecting hole in rotational fit connection with the motor rotating shaft, and the inner two ends of the rotating shaft connecting hole are each sealed connected with the motor rotating shaft through a set of sealing rings.

[0015] A positive pressure protection chamber is formed between the two sets of sealing rings, the outer side wall of the motor rotating shaft, and the inner side wall of the rotating shaft connecting hole.

[0016] A positive pressure protection mechanism is arranged in communication with the positive pressure protection chamber, and the positive pressure protection mechanism comprises a positive pressure gas storage tank in communication with the positive pressure protection chamber through a pipeline.

[0017] Description: During the operation of the fan motor, the air pressure in the positive pressure protection chamber is always greater than the ambient air pressure, effectively preventing the air containing dust or having high humidity from entering the fan motor through the rotating connection of the motor rotating shaft.

[0018] Preferably, an upwardly open positive pressure air supplement cylinder is arranged in communication with the positive pressure gas storage tank, a positive pressure air supplement piston is slidably connected in the positive pressure air supplement cylinder, a gas supplement driving rod is fixed to the top of the positive pressure air supplement piston, and a gas supplement compression chamber is formed between the positive pressure air supplement piston and the bottom of the positive pressure air supplement cylinder.

[0019] A gas supplement discharge pipe in communication with the gas supplement compression chamber is fixed to the outside of the positive pressure air supplement cylinder, the gas supplement discharge pipe has a gas supplement discharge one-way valve, a gas supplement input pipe in communication with the gas supplement compression chamber is fixed to the outside of the positive pressure air supplement cylinder, and the gas supplement input pipe has a gas supplement input one-way valve.

[0020] A positive pressure input pipe and a positive pressure output pipe in communication with the inside of the positive pressure gas storage tank are fixed to the outside of the positive pressure gas storage tank, the gas supplement discharge pipe is in communication with the positive pressure input pipe, and the positive pressure output pipe is in communication with the positive pressure protection chamber.

[0021] Description: The positive pressure air supplement cylinder is used to supplement high-pressure gas into the positive pressure gas storage tank, and the positive pressure air supplement piston reciprocates in the positive pressure air supplement cylinder by manually pushing and pulling the gas supplement driving rod, so that the gas supplement compression chamber is periodically expanded and compressed, dry and dust-free air is supplemented into the positive pressure gas storage tank, and the air pressure in the positive pressure gas storage tank can be maintained at 1.2 standard atmospheres.

[0022] Compared with the prior art, the air suspension fan motor has the advantages shown in the following aspects.

[0023] 1、The air suspension fan motor has reasonable structure design, good sealing performance, and can effectively prevent dust and moisture from entering the motor interior.

[0024] 2、The air pressure balancing mechanism can self-adaptively adjust the pressure difference between the inside and outside of the fan motor caused by temperature difference change, so that the air pressure in the fan motor interior is always balanced with the outside air pressure, and effectively avoids the air containing dust or having high humidity from entering the fan motor interior.

[0025] 3、The positive pressure protection mechanism can always make the air pressure in the positive pressure protection chamber greater than the outside air pressure during the working process of the fan motor, and effectively avoids the air containing dust or having high humidity from entering the fan motor interior through the rotating connection of the motor rotating shaft. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is the front view of the utility model;

[0027] Figure 2 is Figure 1 the sectional view of the utility model;

[0028] Figure 3 is Figure 1 the left view of the utility model;

[0029] Figure 4 is the left view of the air pressure balancing mechanism of the utility model;

[0030] Figure 5 is the structure schematic view of the positive pressure protection chamber of the utility model;

[0031] Figure 6 is the structure schematic view of the positive pressure protection mechanism of the utility model.

[0032] In the diagram, 10-motor body, 11-motor housing, 110-shaft connection hole, 12-motor stator, 13-motor rotor, 14-motor shaft, 140-sealing ring, 20-pneumatic pressure balancing mechanism, 201-pneumatic pressure balancing through hole, 202-pneumatic pressure balancing connecting pipe, 21-pneumatic pressure balancing housing, 22-pneumatic pressure balancing cylinder, 221-pneumatic pressure balancing chamber, 222-external operating chamber, 2220-external pneumatic pressure balancing hole, 223-manual balancing pipe, 2230-manual balancing control valve 23-Pressure balance piston, 231-Manual adjustment connection hole, 232-Manual adjustment rod, 30-Positive pressure protection mechanism, 301-Positive pressure protection chamber, 31-Positive pressure storage tank, 311-Positive pressure input pipe, 312-Positive pressure output pipe, 321-Positive pressure air supply cylinder, 320-Air supply compression chamber, 322-Air supply drive rod, 323-Air supply exhaust pipe, 3230-Air supply exhaust check valve, 324-Air supply input pipe, 3240-Air supply input check valve, 33-Air drying filter. Detailed Implementation

[0033] The following is combined Figures 1-6 This utility model will be described in detail. For ease of description, the orientations mentioned below are defined as follows: The directions of up, down, left, right, front, and back mentioned below are consistent with the directions of up, down, left, right, front, and back in the projection relationship of their respective main views or structural schematic diagrams.

[0034] Example 1:

[0035] A dustproof and moisture-proof air suspension fan motor, such as Figure 1 As shown, it includes a motor body 10 and a pneumatic balance mechanism 20 disposed on the motor body 10;

[0036] like Figure 2 As shown, the motor body 10 consists of a motor housing 11, a motor stator 12 fixed inside the motor housing 11, a motor rotor 13 rotatably connected inside the motor housing 11, and a motor shaft 14 fixed on the motor rotor 13.

[0037] like Figure 3 As shown, the air pressure balancing mechanism 20 includes an air pressure balancing housing 21 fixed to the outer wall of the motor housing 11, such as... Figure 4 As shown, a pressure balance cylinder 22 is fixed inside the pressure balance housing 21, and a pressure balance piston 23 is slidably connected inside the pressure balance cylinder 22. The pressure balance piston 23 divides the pressure balance cylinder 22 into a pressure balance chamber 221 and an external operation chamber 222.

[0038] The motor housing 11 has an internal and external air pressure balance through hole 201, which is connected to the air pressure balance chamber 221 through an air pressure balance connecting pipe 202.

[0039] The air pressure balance cylinder 22 is located at one end of the outer operation chamber 222 and has an outer atmosphere pressure balance hole 2220 that is in communication with the inside and outside.

[0040] As shown in Figure 6 The air pressure balance cylinder 22 is fixed with a manual balance pipe 223 that is in communication with the air pressure balance chamber 221 on the outside, and the manual balance pipe 223 has a manual balance control valve 2230 thereon;

[0041] The air pressure balance piston 23 is located at one end of the outer operation chamber 222 and has a manual adjustment connecting hole 231, and a manual adjustment rod 232 is fixedly connected in the manual adjustment connecting hole 231 by screw threads, and the other end of the manual adjustment rod 232 extends to the outside of the air pressure balance cylinder 22 through the outer atmosphere pressure balance hole 2220.

[0042] Embodiment 2:

[0043] On the basis of embodiment 1, as shown in Figure 5 The motor housing 11 has a shaft connecting hole 110 that is rotationally and matchingly connected with the motor shaft 14, and the inner two ends of the shaft connecting hole 110 are each sealedly connected with the motor shaft 14 through a set of sealing rings 140;

[0044] Each set of sealing rings 140 contains two sealing rings 140;

[0045] A positive pressure protection chamber 301 is formed between the two sets of sealing rings 140, the outer side wall of the motor shaft 14, and the inner side wall of the shaft connecting hole 110;

[0046] As shown in Figure 6 A positive pressure protection mechanism 30 is provided in communication with the positive pressure protection chamber 301, and the positive pressure protection mechanism 30 includes a positive pressure gas storage tank 31 that is in communication with the positive pressure protection chamber 301 through a pipeline.

[0047] Embodiment 3:

[0048] On the basis of embodiment 2, as shown in Figure 6 A positive pressure air supplement cylinder 32 with an opening facing upwards is provided in communication with the positive pressure gas storage tank 31, a positive pressure air supplement piston 321 is slidably connected in the positive pressure air supplement cylinder 32, a gas supplement driving rod 322 is fixed to the top of the positive pressure air supplement piston 321, and a gas supplement compression chamber 320 is formed between the positive pressure air supplement piston 321 and the inner bottom of the positive pressure air supplement cylinder 32;

[0049] A gas supplement discharge pipe 323 is fixed to the outside of the positive pressure air supplement cylinder 32 and is in communication with the gas supplement compression chamber 320, and the gas supplement discharge pipe 323 has a gas supplement discharge one-way valve 3230 thereon; a gas supplement input pipe 324 is fixed to the outside of the positive pressure air supplement cylinder 32 and is in communication with the gas supplement compression chamber 320, and the gas supplement input pipe 324 has a gas supplement input one-way valve 3240 thereon;

[0050] The positive pressure storage tank 31 is externally fixed with a positive pressure input pipe 311 and a positive pressure output pipe 312 which are in communication with the inside of the positive pressure storage tank 31, and the air supplementing and discharging pipe 323 is in communication with the positive pressure input pipe 311, and the positive pressure output pipe 312 is in communication with the positive pressure protection chamber 301;

[0051] An air drying filter 33 is in series communication between the air supplementing and discharging pipe 323 and the positive pressure input pipe 311, and the air drying filter 33 is an air drying filter of the prior art;

[0052] The positive pressure storage tank 31 and the positive pressure air supplementing cylinder 32 are fixedly installed in the air pressure balance containing shell 21.

[0053] Embodiment 4:

[0054] The difference from Embodiment 3 is that each group of sealing rings 140 contains 3 sealing rings 140.

[0055] Embodiment 5:

[0056] The difference from Embodiment 3 is that each group of sealing rings 140 contains 4 sealing rings 140.

[0057] It should be noted that the manual balance control valve 2230, the sealing ring 140, the air supplementing and discharging one-way valve 3230 and the air supplementing input one-way valve 3240 used in the present application are all of the prior art, and are not specially limited herein, and a person skilled in the art can select them according to the needs, as long as the technical solutions of the present application can be realized.

[0058] In the working process of the fan motor, the working temperature of the fan motor itself will rise, and after stopping running, the temperature of the fan motor itself will gradually decrease. Due to the change of temperature difference, the air thermal expansion and cold contraction are caused, and then the change of the pressure difference between the inside and outside of the fan motor is caused. Although the fan motor has good sealing property in general, under the action of the pressure difference, the air containing dust or having high humidity in the outside will inevitably enter the inside of the fan motor, and long-term will cause certain damage to the inside of the fan motor.

[0059] In the actual application process of the utility model, the pressure difference between the inside and outside of the fan motor caused by the change of temperature difference can be self-adaptively adjusted, so that the air pressure in the inside of the fan motor is always kept balanced with the air pressure in the outside, and the air containing dust or having high humidity in the outside is effectively prevented from entering the inside of the fan motor.

[0060] When the fan motor is running and the temperature is rising, the air inside the fan motor expands due to heating. Some of the air inside the fan motor will escape through the air pressure balancing hole 201 and the air pressure balancing connecting pipe 202 into the air pressure balancing chamber 221, pushing the air pressure balancing piston 23 to move and increase the volume of the air pressure balancing chamber 221, so that the air pressure inside the fan motor is balanced with the outside atmospheric pressure, thereby offsetting the increase in air pressure inside the fan motor due to temperature rise and preventing the air inside the fan motor from escaping to the outside;

[0061] When the fan motor stops running and cools down, the air inside the fan motor gradually cools and contracts. The air that has escaped into the air pressure balancing chamber 221 returns to the inside of the fan motor through the air pressure balancing connecting pipe 202 and the air pressure balancing hole 201. At this time, the air pressure balancing piston 23 moves under the push of the outside atmospheric pressure, reducing the volume of the air pressure balancing chamber 221, so that the air pressure inside the fan motor is rebalanced with the outside atmospheric pressure, preventing the entry of air containing dust or high humidity from the outside into the inside of the fan motor due to the decrease in air pressure inside the fan motor during cooling.

[0062] During the operation of the fan motor, the air pressure in the positive pressure protection chamber 301 is always greater than the outside air pressure, effectively preventing the entry of air containing dust or high humidity from the outside into the inside of the fan motor through the rotating connection of the motor shaft 14.

[0063] The positive pressure air supplement cylinder 32 is used to supplement high-pressure gas into the positive pressure gas storage tank 31. The top of the air pressure balancing container 21 is a flip-open cover. Opening the cover at the top of the air pressure balancing container 21 and manually pushing and pulling the air supplement driving rod 322 makes the positive pressure air supplement piston 321 move back and forth in the positive pressure air supplement cylinder 32. The air supplement compression chamber 320 is periodically expanded and compressed. During the expansion process, the air supplement input one-way valve 3240 is opened, and outside air enters the air supplement compression chamber 320 through the air supplement input pipe 324. During the compression process, the air supplement exhaust one-way valve 3230 is opened, and the air in the air supplement compression chamber 320 enters the inside of the positive pressure gas storage tank 31 through the air supplement exhaust pipe 323. The air is dried and filtered by the air drying filter 33 to ensure that the air entering the positive pressure gas storage tank 31 is dry and dust-free, so that the air in the positive pressure gas storage tank 31 is maintained at 1.2 standard atmospheres.

Claims

1. A dust and moisture proof air suspension fan motor, characterized by, The motor body (10) is composed of a motor shell (11), a motor stator (12) fixed in the motor shell (11), a motor rotor (13) rotatably connected in the motor shell (11), and a motor rotating shaft (14) fixed on the motor rotor (13). The motor body (10) is composed of a motor shell (11), a motor stator (12) fixed in the motor shell (11), a motor rotor (13) rotatably connected in the motor shell (11), and a motor rotating shaft (14) fixed on the motor rotor (13). The air pressure balance mechanism (20) includes an air pressure balance containing shell (21) fixed on the outer side wall of the motor shell (11), an air pressure balance cylinder (22) fixed in the air pressure balance containing shell (21), and an air pressure balance piston (23) slidably connected in the air pressure balance cylinder (22). The motor shell (11) has an air pressure balance through hole (201) communicating inside and outside on it, and the air pressure balance through hole (201) is connected with the air pressure balance chamber (221) through an air pressure balance communication pipe (202). One end of the air pressure balance cylinder (22) in the outer operation chamber (222) has an external environment air pressure balance hole (2220) communicating inside and outside.

2. The dust and moisture proof air suspension fan motor according to claim 1, wherein, The outer side of the air pressure balance cylinder (22) is fixed with a manual balance pipe (223) connected with the air pressure balance chamber (221), and the manual balance pipe (223) has a manual balance control valve (2230) thereon. One end of the air pressure balance piston (23) in the outer operation chamber (222) has a manual adjusting connecting hole (231), a manual adjusting rod (232) is fixedly connected in the manual adjusting connecting hole (231) by screw threads, and the other end of the manual adjusting rod (232) extends to the outside of the air pressure balance cylinder (22) through the external environment air pressure balance hole (2220).

3. The dust and moisture proof air bearing fan motor of claim 1, wherein, The motor shell (11) has a rotating shaft connecting hole (110) rotatably connected with the motor rotating shaft (14), and the inner two ends of the rotating shaft connecting hole (110) are each sealed connected with the motor rotating shaft (14) through a group of sealing rings (140); Two groups of the sealing rings (140), the outer side wall of the motor rotating shaft (14), and the inner side wall of the rotating shaft connecting hole (110) form a positive pressure protection chamber (301); A positive pressure protection mechanism (30) is arranged in communication with the positive pressure protection chamber (301), and the positive pressure protection mechanism (30) includes a positive pressure gas storage tank (31) connected with the positive pressure protection chamber (301) through a pipeline.

4. The dust and moisture proof air bearing fan motor of claim 3, wherein, An opening upward positive pressure air supplement cylinder (32) is arranged in communication with the positive pressure gas storage tank (31), a positive pressure air supplement piston (321) is slidably connected in the positive pressure air supplement cylinder (32), a gas supplement driving rod (322) is fixed on the top of the positive pressure air supplement piston (321), and a gas supplement compression chamber (320) is formed between the positive pressure air supplement piston (321) and the bottom of the positive pressure air supplement cylinder (32). The positive pressure air supplementing cylinder (32) is fixed outside and connected with the air supplementing compression chamber (320) through an air supplementing outlet pipe (323) with an air supplementing outlet one-way valve (3230); the positive pressure air supplementing cylinder (32) is fixed outside and connected with the air supplementing compression chamber (320) through an air supplementing input pipe (324) with an air supplementing input one-way valve (3240); The positive pressure air supplementing cylinder (32) is fixed outside and connected with the air supplementing compression chamber (320) through an air supplementing outlet pipe (323) with an air supplementing outlet one-way valve (3230); the positive pressure air supplementing cylinder (32) is fixed outside and connected with the air supplementing compression chamber (320) through an air supplementing input pipe (324) with an air supplementing input one-way valve (3240);

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