Novel structure of low-power integrated permanent magnet frequency conversion screw air compressor

Abstract

The utility model discloses a novel structure of a low-power integrated permanent magnet frequency conversion screw air compressor, and belongs to the technical field of gas compression fluid mechanical equipment. A novel structure of a low-power integrated permanent magnet frequency conversion screw air compressor comprises a screw air compressor assembly and an air storage tank, the screw air compressor assembly is fixedly installed on the upper portion of the air storage tank and comprises a bottom plate, a motor, a screw main machine, an oil-gas separator, a cooling device, an air filter, a frequency converter and a machine shell, and the motor, the screw main machine, the oil-gas separator, the cooling device, the air filter, the frequency converter and the machine shell are detachably installed on the bottom plate. The screw main machine, the oil-gas separator and the gas storage tank are sequentially communicated through connecting pipes and used for compressing gas, separating oil and gas and storing the oil and gas into the gas storage tank. The cooling device is located on the side away from the hinged side of the machine shell and the bottom plate and can take away heat generated by the motor and the screw main machine through air suction. And an external oil separation core is arranged between the oil-gas separator and the gas storage tank and is used for further separating oil and gas which are preliminarily separated by the oil-gas separator.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas compression fluid mechanical equipment, and more specifically relates to a new structure of a small-power integrated permanent magnet variable frequency screw air compressor. Background Art

[0002] Screw air compressor is a kind of efficient and reliable compressed air equipment, which consists of compressor main unit, motor, oil-gas separator, cooling system, control system, etc. Its working principle is to drive the screw of compressor main unit to rotate through motor, so that air enters into the compressor through air intake filter, the rotation of screw compresses air, and the compressed oil-gas mixture enters oil-gas separator, and oil and gas are separated by centrifugal, collision and other methods, and then enter into gas storage tank or use system.

[0003] The air storage tank and air compressor of traditional screw air compressors are separately arranged, and this arrangement is relatively complicated and occupies a large area. For example, a tank-type air compressor disclosed in a Chinese invention patent document (CN201721433257.1) integrates the air compressor and the air storage tank into one, and makes the oil separator cylinder, the air outlet, the oil outlet, the safety valve interface and the exhaust hole into a whole, and the external oil separator core is connected to the exhaust hole, which can save costs and effectively save layout space. However, due to the large vibration during the operation of the air compressor, the connection between the external oil separator core and the exhaust hole may also be affected by the vibration and may produce gaps, causing air leakage in the device.

[0004] Therefore, we need an integrated screw air compressor with a reasonable device layout, easy replacement of the external oil separator and no leakage. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a new structure of a small-power integrated permanent magnet variable frequency screw air compressor, with a reasonable device layout and convenient replacement of the external oil separator core, while avoiding air leakage during the operation of the device.

[0006] The utility model discloses a novel structure of a small-power integrated permanent magnet variable frequency screw air compressor, comprising a screw air compressor assembly and an air storage tank, wherein the screw air compressor assembly is fixedly mounted on the upper part of the air storage tank, the screw air compressor assembly comprises a base plate, a motor, a screw main unit, an oil-gas separator, a cooling device, an air filter, a frequency converter and a casing, the motor, the screw main unit, the oil-gas separator, the cooling device, the air filter and the frequency converter are respectively detachably connected to the base plate, and the casing is hinged to one side of the base plate; the air filter is arranged on the upper part of the screw main unit for filtering the air inhaled by the screw main unit; the frequency converter is connected to the motor signal for steplessly regulating the motor speed.

[0007] The screw main unit, oil-gas separator and gas storage tank are connected in sequence through a connecting pipe, and are used to compress gas and separate oil and gas and then store them in the gas storage tank; the motor is detachably connected to the screw main unit, and is used to drive the screw main unit to compress gas.

[0008] The cooling device is located at a side away from the hinged connection between the housing and the bottom plate, and can take away the heat generated by the motor and the screw main unit by suction.

[0009] An external oil separation core is also provided between the oil-gas separator and the gas storage tank, which is used to further separate the oil and gas preliminarily separated by the oil-gas separator and transport them to the gas storage tank.

[0010] As a further improvement of the utility model, the external oil separator core includes a connecting seat, a conduit, an oil separator and a fastener. The contour of the connecting seat is a three-way tube; a connecting port is provided inside the connecting seat, which is threadedly connected to the upper part of the conduit; the lower part of the conduit is threadedly connected to the top of the oil separator for replacing the oil separator; the upper opening of the oil separator has the same diameter as the bottom of the connecting seat; the fastener is provided at the upper part of the connecting seat, threadedly connected to the top of the connecting seat, and detachably connected to the oil separator inside the conduit, which can further strengthen the connection between the oil separator and the connecting seat.

[0011] As a further improvement of the utility model, the connecting seat also includes an inlet and an outlet, one end of the inlet is connected to the oil-gas separator, and the other end is connected to the area where the oil separator is located, which is used to separate the oil and gas mixture output by the oil-gas separator at the oil separator; one end of the outlet is connected to the gas storage tank, and the other end is connected to the connecting port, which is used to discharge the compressed gas after oil and gas separation along the conduit to the gas storage tank.

[0012] As a further improvement of the utility model, the fastener includes a seal, a pair of elastic plates and a pair of outer edge ramps. The seal is located above the connecting seat to ensure that the external oil separator core does not leak oil and gas; the pair of outer edge ramps are respectively located at the bottom of a pair of elastic plates; a fastening tube is provided inside the oil separator, the bottom of the fastening tube is fixed to the oil separator, and a radial ramp matching the outer edge ramp is provided on the top inner wall, and the outer edge ramp is elastically acted on by the elastic plate and engages with the radial ramp.

[0013] As a further improvement of the utility model, the cooling device includes a cooling fan and a radiator; the motor, the screw main unit, the radiator and the cooling fan are laterally distributed and arranged in sequence, so that the motor and the screw main unit with higher heat generation can be fully cooled, thereby maintaining the continuous operation of the device.

[0014] As a further improvement of the utility model, a plurality of universal wheels are provided at the bottom of the gas storage tank for transferring the screw air compressor as a whole in multiple directions; a forklift position is provided at the lower part of the gas storage tank for forklift transportation.

[0015] As a further improvement of the utility model, a display screen and an emergency stop button are provided on the casing, and both the display screen and the emergency stop button are connected to the frequency converter and the motor wireless signal for directly controlling the opening and closing of the device.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows: by using a new structure of a small-power integrated permanent magnet variable-frequency screw air compressor of the utility model, the air storage tank and the air compressor are integrated into an integrated design, the floor space is reduced, and at the same time, an external oil separator core that is easy to replace is adopted, and there is no need to remove the oil-gas separator for replacement; by distributing the motor, screw main unit, radiator and cooling fan horizontally and arranging them in sequence, the motor and screw main unit with higher heat generation are fully cooled, thereby maintaining the continuous operation of the device; by arranging fasteners to engage with the oil separator, it is ensured that the oil separator will not gradually fall off after receiving the vibration of the screw compressor, and that there will be no leakage at the external oil separator core. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 This is a schematic diagram of the screw air compressor assembly structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the external oil separation core of the utility model;

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of the external oil separation core of the utility model;

[0021] Figure 5 It is an enlarged schematic diagram of the structure at A of the utility model;

[0022] Figure 6 This is a schematic diagram of the fastener structure of the utility model.

[0023] Description of the numbers in the figure:

[0024] 1 screw air compressor assembly, 11 base plate, 12 motor, 13 screw main unit, 14 oil-gas separator, 15 cooling device, 151 cooling fan, 152 radiator, 16 air filter, 17 inverter, 18 casing, 181 display screen, 182 emergency stop button, 19 external oil separator core, 191 connecting seat, 192 conduit, 193 oil separator, 194 fastener, 1941 outer edge ramp, 1942 elastic plate, 1943 seal, 195 fastening pipe, 1951 radial ramp, 196 connection port, 197 inlet, 198 outlet, 2 gas tank, 21 universal wheel, 22 forklift position. DETAILED DESCRIPTION

[0025] Specific embodiment 1: Please refer to Figure 1-Figure 6A new type of small-power integrated permanent magnet variable frequency screw air compressor structure is disclosed, comprising a screw air compressor assembly 1 and an air storage tank 2, wherein the screw air compressor assembly 1 is fixedly mounted on the upper part of the air storage tank 2, and the screw air compressor assembly 1 comprises a base plate 11, a motor 12, a screw host 13, an oil-gas separator 14, a cooling device 15, an air filter 16, a frequency converter 17 and a casing 18; the motor 12, the screw host 13, the oil-gas separator 14, the cooling device 15, the air filter 16 and the frequency converter 17 are respectively detachably connected to the base plate 11, and the casing 18 is hinged to one side of the base plate 11, and the casing 18 can be opened at any time to check the operation status inside the screw air compressor assembly 1; the air filter 16 is arranged on the upper part of the screw host 13, and is used for filtering the air inhaled by the screw host 13; the frequency converter 17 is connected to the motor 12 signal, and is used for steplessly adjusting the speed of the motor 12.

[0026] The screw main unit 13, the oil-gas separator 14 and the gas storage tank 2 are connected in sequence through a connecting pipe. The screw main unit 13 compresses the gas and transports the oil and gas to the oil-gas separator 14 to separate the oil and gas. Then the oil-gas separator 14 stores the separated compressed gas in the gas storage tank 2; the motor 12 is detachably connected to the screw main unit 13, and is used to drive the screw main unit 13 to compress the gas.

[0027] The cooling device 15 is located at a side away from the housing 18 and hinged to the bottom plate 11, and can take away the heat generated by the motor 12 and the screw main unit 13 by suction, thereby preventing the motor 12 and the screw main unit 13 from overheating and causing shutdown.

[0028] An external oil separation core 19 is also provided between the oil-gas separator 14 and the gas storage tank 2 , which is used to further separate the oil and gas preliminarily separated by the oil-gas separator 14 and transport them to the gas storage tank 2 .

[0029] Specifically, Figure 3-Figure 4 The external oil separator core 19 shown includes a connecting seat 191, a conduit 192, an oil separator 193 and a fastener 194. The connecting seat 191 has a three-way tubular profile; a connecting port 196 is provided inside the connecting seat 191, which is threadedly connected to the upper part of the conduit 192; the lower part of the conduit 192 is threadedly connected to the top of the oil separator 193, so that the oil separator 193 can be directly removed by rotating with a belt wrench, and the replacement process is convenient; the upper opening of the oil separator 193 has the same diameter as the bottom of the connecting seat 191; the fastener 194 is provided on the upper part of the connecting seat 191, is threadedly connected to the top of the connecting seat 191, and is detachably connected to the oil separator 193 inside the conduit 192, which can further strengthen the connection between the oil separator 193 and the connecting seat 191.

[0030] Specifically, the connecting seat 191 also includes an inlet 197 and an outlet 198. One end of the inlet 197 is connected to the oil-gas separator 14, and the other end is connected to the area where the oil separator 193 is located, which is used to separate the oil-gas mixture output by the oil-gas separator 14 at the oil separator 193; one end of the outlet 198 is connected to the gas storage tank 2, and the other end is connected to the connecting port 196, which is used to discharge the compressed gas after oil and gas separation to the gas storage tank along the conduit 192, thereby completing the purification of the compressed gas.

[0031] Specifically, Figure 6 The fastener 194 shown includes a seal 1943, a pair of elastic plates 1942 and a pair of outer edge ramps 1941. The seal 1943 is located above the connection seat 191. After the fastener 194 is screwed together with the connection seat 191, the inside of the connection seat 191 is sealed, thereby ensuring that the external oil separator core 19 does not leak oil and gas; the pair of outer edge ramps 1941 are respectively located at the bottom of the pair of elastic plates 1942; a fastening tube 195 is provided inside the oil separator 193, the bottom of the fastening tube 195 is fixed to the oil separator 193, and a radial ramp 1951 matching the outer edge ramp 1941 is provided on the top inner wall, as shown in FIG. Figure 5 As shown, when the fastener 194 and the connecting seat 191 are threadedly tightened, the outer edge ramp 1941 is elastically acted upon by the elastic plate 1942 to engage with the radial ramp 1942; when the fastener 194 and the connecting seat 191 are threadedly loosened, the elastic plate 1942 is affected by the conduit 192 to shrink inwardly so that the outer edge ramp 1941 and the radial ramp 1942 are disengaged.

[0032] Specifically, the cooling device 15 includes a cooling fan 151 and a radiator 152; the motor 12, the screw main unit 13, the radiator 14 and the cooling fan 15 are horizontally distributed and arranged in sequence, so that the motor 12 and the screw main unit 13 with higher heat generation levels can be fully cooled, thereby maintaining the continuous normal operation of the device and avoiding shutdown caused by overheating of the motor 12 and the screw main unit 13.

[0033] Specifically, a plurality of universal wheels 21 are provided at the bottom of the gas storage tank 2 for transferring the screw air compressor as a whole in multiple directions; a forklift position 22 is provided at the lower part of the gas storage tank 2 for forklift transportation.

[0034] Specifically, a display screen 181 and an emergency stop button 182 are provided on the casing 18. The display screen 181 and the emergency stop button 182 are both connected to the frequency converter 17 and the motor 12 by wireless signals. The display screen 181 displays various parameters of the screw host 13. At the same time, the various parameters of the screw host 13 can be adjusted through the frequency converter 17. The emergency stop button 182 can control the shutdown of the motor 12 and the screw host 13 in extreme cases to protect the safety of the device.

[0035] During use, the oil separator 193 is screwed to the guide tube 192 by turning it with a wrench, and the fastener 194 is screwed to the connection seat 191 to ensure the sealing of the external oil separator core 19; the motor 12 and the screw main unit 13 are controlled to start running through the display 181, and the screw main unit 13 absorbs air through the air filter 16 and compresses and transports it to the oil-gas separator 14, and the oil and gas are initially separated, and large particles of oil droplets are retained in the oil-gas separator 14; the oil-gas separator 14 transports oil and gas to the inlet 197 of the external oil separator core 19, and the oil and gas enter the oil separator 193 area through the inlet 197, and the oil separator 19 3. The oil and gas are further purified, and the compressed gas is outputted into the conduit 192 through the fastening tube 195, and is transported to the gas storage tank 2 through the outlet 198 along the conduit 192; during the operation, the cooling fan 151 is turned on to take away the heat generated by the motor 12 and the screw main unit 13 by suction, so as to avoid the motor 12 and the screw main unit 13 from overheating and causing shutdown; when the external oil separator core 19 needs to be replaced after working for a period of time, the fastener 194 and the connecting seat 191 are loosened to disengage the outer edge ramp 1941 from the radial ramp 1942, and then the old oil separator 193 is removed and replaced with a wrench.

[0036] 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 novel structure of a small-power integrated permanent magnet variable frequency screw air compressor, comprising a screw air compressor assembly (1) and an air storage tank (2), characterized in that: The screw air compressor assembly (1) is fixedly mounted on the upper part of the air storage tank (2). The screw air compressor assembly (1) comprises a base plate (11) and a motor (12) detachably mounted on the base plate (11), a screw main unit (13), an oil-gas separator (14), a cooling device (15), an air filter (16), a frequency converter (17) and a casing (18). The casing (18) is hinged to one side of the base plate (11). The air filter (16) is arranged on the upper part of the screw main unit (13) and is used to filter the air sucked in by the screw main unit (13). The frequency converter (17) is connected to the motor (12) signal and is used to steplessly adjust the speed of the motor (12). The screw main unit (13), the oil-gas separator (14) and the gas storage tank (2) are connected in sequence via a connecting pipe and are used to compress gas and store the separated oil and gas. The motor (12) is detachably connected to the screw main unit (13) and is used to drive the screw main unit (13) to compress gas. The cooling device (15) is located on a side away from the housing (18) and hinged to the bottom plate (11), and removes heat generated by the motor (12) and the screw main unit (13) by suction. An external oil separation core (19) is also provided between the oil-gas separator (14) and the gas storage tank (2) for further separating the oil and gas entering the gas storage tank (2).

2. According to claim 1, a new type of small-power integrated permanent magnet variable frequency screw air compressor structure is characterized in that: The external oil separator core (19) comprises a connecting seat (191), a conduit (192), an oil separator (193) and a fastener (194); the connecting seat (191) has a three-way tubular profile; a connecting port (196) is provided inside the connecting seat (191) and is threadedly connected to the upper portion of the conduit (192); the lower portion of the conduit (192) is threadedly connected to the top of the oil separator (193) for replacing the oil separator (193); the upper port of the oil separator (193) has the same diameter as the bottom port of the connecting seat (191); the fastener (194) is provided on the upper portion of the connecting seat (191), is threadedly connected to the top of the connecting seat (191), and is detachably connected to the oil separator (193) inside the conduit (192).

3. According to claim 2, a new type of small-power integrated permanent magnet variable frequency screw air compressor structure is characterized in that: The connecting seat (191) further comprises an inlet (197) and an outlet (198); one end of the inlet (197) is connected to the oil-gas separator (14), and the other end is connected to the area where the oil separator (193) is located, and is used to separate the oil-gas mixture output by the oil-gas separator (14) at the oil separator (193); one end of the outlet (198) is connected to the gas storage tank (2), and the other end is connected to the connecting port (196), and is used to discharge the compressed gas after the oil-gas separation along the conduit (192) to the gas storage tank (2).

4. The novel structure of a small-power integrated permanent magnet variable frequency screw air compressor according to claim 2 is characterized in that: The fastener (194) comprises a sealing member (1943), a pair of elastic plates (1942) and a pair of outer edge inclined platforms (1941); the sealing member (1943) is located above the connecting seat (191) and is used to ensure that the external oil separator core (19) does not leak oil and gas; the pair of outer edge inclined platforms (1941) are respectively located at the bottom of the pair of elastic plates (1942); a fastening tube (195) is provided inside the oil separator (193); the bottom of the fastening tube (195) is fixed to the oil separator (193); a radial inclined platform (1951) matching the outer edge inclined platform (1941) is provided on the inner wall of the top; the outer edge inclined platform (1941) is elastically acted upon by the elastic plate (1942) to engage with the radial inclined platform (1951).

5. The novel structure of a small-power integrated permanent magnet variable frequency screw air compressor according to claim 1 is characterized in that: The cooling device (15) comprises a cooling fan (151) and a radiator (152); the motor (12), the screw main unit (13), the radiator (152) and the cooling fan (151) are arranged in a transverse distribution in sequence, and are used to fully cool the motor and the screw main unit with high heat generation.

6. The novel structure of a small-power integrated permanent magnet variable frequency screw air compressor according to claim 1 is characterized in that: The bottom of the gas storage tank is provided with a plurality of universal wheels for transferring the screw air compressor as a whole in multiple directions; the lower part of the gas storage tank is provided with a forklift position for forklift transportation.

7. The novel structure of a small-power integrated permanent magnet variable frequency screw air compressor according to claim 1 is characterized in that: The housing (18) is provided with a display screen (181) and an emergency stop button (182), and the display screen (181) and the emergency stop button (182) are both connected to the frequency converter (17) and the motor (12) via wireless signals, and are used to directly control the opening and closing of the device.

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