Magnetic air compressor

Abstract

The utility model relates to the technical field of air compression, in particular to a magnetic air compressor. In order to solve the problem that a magnetic drive pump in an existing magnetic air compressor is high in failure rate, the magnetic air compressor comprises the magnetic drive pump, an oil gas barrel and an electric control system, an oil inlet of the magnetic drive pump is communicated with an oil outlet of the oil gas barrel, and the oil inlet of the magnetic drive pump is lower than the oil gas barrel in the vertical direction; a thermal relay is arranged in the electric control system and located in a control circuit of a motor in the magnetic drive pump, and when control current in the control circuit reaches a set value, the thermal relay controls the control circuit to be disconnected. According to the magnetic air compressor disclosed by the utility model, the sliding bearing can be prevented from being seriously abraded and even rapidly generating high temperature to seriously damage the magnetic drive pump due to instant loss of cooling and lubrication, and the fault rate of the magnetic drive pump is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air compression, in particular to a magnetic air compressor. Background Art

[0002] In existing magnetic air compressors, the magnetic pump has a high failure rate, a short service life and is prone to oil leakage. Utility Model Content

[0003] In order to solve the problem of high failure rate of magnetic pumps in existing magnetic air compressors, the utility model proposes a magnetic air compressor, which includes a magnetic pump, an oil and gas barrel and an electronic control system, the oil inlet of the magnetic pump is connected to the oil outlet of the oil and gas barrel, and the oil inlet of the magnetic pump is lower than the oil and gas barrel in the vertical direction; a contactor and a thermal relay are provided in the electronic control system, the main contacts in the contactor control the on and off of the main circuit, the auxiliary contacts of the contactor control the on and off of the control circuit of the motor of the magnetic pump, the thermal relay is located in the control circuit, when the current in the control circuit reaches a set value, the thermal relay is disconnected due to heat, the contactor loses power and disconnects, and the motor in the magnetic pump stops working. Thus, in the magnetic air compressor of the utility model, the oil inlet of the magnetic pump is lower than the oil and gas barrel in the vertical direction, so that the lubricating oil in the oil and gas barrel can be delivered to the magnetic pump in time, so as to avoid the sliding bearing inside the pump chamber of the magnetic pump from losing cooling and lubricating functions instantly due to untimely replenishment of lubricating oil when operating under abnormal conditions, thereby avoiding serious wear of the sliding bearing due to instantaneous loss of cooling and lubrication, and even rapid generation of high temperature, causing serious damage to the magnetic pump, and reducing the failure rate of the magnetic pump; a contactor and a thermal relay are arranged in the control circuit of the electric control system, wherein the contactor controls the on-off of the main circuit through the main contact, and controls the on-off of the control circuit of the motor of the magnetic pump through the auxiliary contact. When the control current in the control circuit exceeds the set value or lasts for too long, the thermal element in the thermal relay generates heat to bend the bimetallic strip due to heat, disconnecting the control circuit, thereby causing the contactor to lose power, and then disconnecting the main circuit, realizing overload protection, avoiding overload of the motor in the magnetic pump, and then avoiding the demagnetization problem of the magnetic pump due to overload of the motor. In addition, the contactor can delay the start of the magnetic pump, so that the magnetic pump starts after the internal pressure of the magnetic air compressor of the utility model is established, thereby allowing the lubricating oil to form an internal circulation in the magnetic air compressor of the utility model, avoiding idling of the magnetic pump and reducing the failure rate of the magnetic pump of the magnetic air compressor of the utility model.

[0004] Preferably, a cooling mechanism is provided in the magnetic air compressor, and the oil outlet of the oil and gas barrel is connected to the cooling oil inlet of the cooling mechanism through an oil delivery pipe, and the cooling oil outlet of the cooling mechanism is connected to the oil inlet of the magnetic pump through a cooling oil delivery pipe. In this way, a cooling mechanism is provided in the magnetic air compressor of the utility model, so that the lubricating oil input into the magnetic pump is cooled by the cooling mechanism, thereby cooling the magnetic pump by the lubricating oil, and avoiding the demagnetization problem of the magnetic pump due to excessive temperature. Furthermore, a Y-type filter, a magnetic ring and an oil filter are sequentially provided on the cooling oil delivery pipe, and the Y-type filter is close to the cooling mechanism, and the oil filter is close to the magnetic pump. In this way, a Y-type filter, a magnetic ring and an oil filter are arranged on the cooling oil delivery pipe connecting the cooling oil outlet of the cooling mechanism and the oil inlet of the magnetic pump, so that the Y-type filter can be used to coarsely filter the lubricating oil entering the magnetic pump, the magnetic ring can be used to adsorb ferromagnetic impurities in the lubricating oil to the inner wall of the cooling oil delivery pipe, and the oil filter can be used to finely filter the lubricating oil, so as to effectively improve the cleanliness of the lubricating oil entering the magnetic pump and avoid impurities entering the magnetic pump, which may cause oil leakage in the magnetic pump due to wear of the pump head.

[0005] Preferably, the oil outlet of the magnetic pump is connected to the oil inlet of the main compressor through an oil delivery pipe, and a lubricating oil filter is provided on the oil delivery pipe. Thus, a lubricating oil filter is provided on the oil delivery pipe connecting the oil outlet of the magnetic pump and the oil inlet of the main compressor to filter the lubricating oil entering the main compressor to remove impurities in the lubricating oil, thereby preventing the impurities from entering the main compressor along with the lubricating oil and causing damage to the main compressor.

[0006] Preferably, the compression host is a screw host. Thus, the screw host is used as the compression host of the magnetic air compressor of the utility model, which is simple to select, and convenient to assemble and control. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 The figure is a schematic diagram of the structural principle of the magnetic air compressor of the utility model. DETAILED DESCRIPTION

[0008] Next, combine Figure 1 The magnetic air compressor of the utility model is described in detail.

[0009] like Figure 1As shown, the magnetic air compressor of the utility model includes a magnetic pump 1, an oil and gas barrel 2 and an electric control system (not shown in the figure). Among them, the oil inlet of the magnetic pump 1 is connected to the oil outlet of the oil and gas barrel 2, and the oil inlet of the magnetic pump 1 is lower than the oil and gas barrel 2 in the vertical direction. A contactor (not shown in the figure) and a thermal relay 31 are provided in the electric control system. Since the main contact in the contactor is a normally open contact, and the auxiliary contact in the contactor includes a normally open and normally closed contact, the main contact in the contactor is used to control the on and off of the main circuit, and the auxiliary contact of the contactor is used to control the on and off of the control circuit of the motor (not shown in the figure) of the magnetic pump 1; the thermal relay 31 is located in the control circuit. Since the thermal relay 31 contains a thermal element and a bimetallic strip, when the current in the control circuit reaches the set value, the thermal element in the thermal relay 31 generates heat when the current passes through, and the bimetallic strip is bent by heat, disconnecting the control circuit, thereby causing the contactor to lose power and disconnect, and the motor in the magnetic pump 1 stops working. Thus, in the magnetic air compressor of the utility model, the oil inlet of the magnetic pump 1 is lower than the oil and gas barrel 2 in the vertical direction, so that the lubricating oil in the oil and gas barrel 2 can be delivered to the magnetic pump 1 in time, so as to avoid the sliding bearing inside the pump cavity of the magnetic pump 1 from losing cooling and lubricating function instantly due to untimely replenishment of lubricating oil when operating under abnormal conditions, thereby avoiding serious wear of the sliding bearing due to instantaneous loss of cooling and lubrication, and even rapidly generating high temperature, causing serious damage to the magnetic pump 1, and reducing the failure rate of the magnetic pump 1; a contactor and a thermal relay 31 are arranged in the control circuit of the electric control system, wherein the contactor controls the on and off of the main circuit through the main contact, and controls the on and off of the control circuit of the motor of the magnetic pump 1 through the auxiliary contact. When the control current in the control circuit exceeds the set value or lasts for too long, the thermal element in the thermal relay 31 generates heat to bend the bimetallic strip due to heat, disconnecting the control circuit, thereby causing the contactor to lose power, and then disconnecting the main circuit, realizing overload protection, avoiding overload of the motor in the magnetic pump 1, and then avoiding the demagnetization problem of the magnetic pump 1 due to overload of the motor. In addition, the contactor can delay the start of the magnetic pump 1, so that the magnetic pump 1 starts after the internal pressure of the magnetic air compressor of the utility model is established, so that the lubricating oil forms an internal circulation in the magnetic air compressor of the utility model, avoiding the idling of the magnetic pump 1 and reducing the failure rate of the magnetic pump of the magnetic air compressor of the utility model.

[0010] like Figure 1As shown, a cooling mechanism 4 is provided in the magnetic air compressor of the utility model, and the oil outlet of the oil and gas barrel 2 is connected to the cooling oil inlet of the cooling mechanism 4 through an oil delivery pipe, and the cooling oil outlet of the cooling mechanism 4 is connected to the oil inlet of the magnetic pump 1 through a cooling oil delivery pipe. In this way, a cooling mechanism 4 is provided in the magnetic air compressor of the utility model, so that the cooling mechanism 4 is used to cool the lubricating oil input into the magnetic pump 1, so as to cool the magnetic pump 1 with the lubricating oil, and avoid the demagnetization problem of the magnetic pump 1 due to excessive temperature. Preferably, the cooling mechanism 4 includes a cooling fan 41 and a heat exchanger 42, the cooling fan 41 performs air cooling on the heat exchanger 42 to reduce the temperature of the heat exchanger 42, and the heat exchanger 42 exchanges heat with the lubricating oil input into the cooling mechanism to cool the lubricating oil. Preferably, a Y-type filter 51, a magnetic ring 52 and an oil filter 53 are sequentially provided on the cooling oil delivery pipe, and the Y-type filter 51 is close to the cooling mechanism 4, and the oil filter 53 is close to the magnetic pump 1. In this way, a Y-type filter 51, a magnetic ring 52 and an oil filter 53 are arranged on the cooling oil delivery pipe connecting the cooling oil outlet of the cooling mechanism 4 and the oil inlet of the magnetic pump 1, so as to use the Y-type filter 51 to roughly filter the lubricating oil entering the magnetic pump 1, use the magnetic ring 52 to adsorb the ferromagnetic impurities in the lubricating oil to the inner wall of the cooling oil delivery pipe, and use the oil filter 53 to finely filter the lubricating oil, so as to effectively improve the cleanliness of the lubricating oil entering the magnetic pump 1, and avoid impurities entering the magnetic pump and causing the magnetic pump 1 to have oil leakage problems due to pump head wear. Preferably, the oil outlet of the magnetic pump 1 is connected to the oil inlet of the compression main unit 6 through an oil delivery pipe, and a lubricating oil filter 7 is arranged on the oil delivery pipe. In this way, a lubricating oil filter 7 is arranged on the oil delivery pipe connecting the oil outlet of the magnetic pump 1 and the oil inlet of the compression main unit 6, so as to filter the lubricating oil entering the compression main unit 6, remove impurities in the lubricating oil, and thus avoid impurities entering the compression main unit 6 with the lubricating oil and causing damage to the compression main unit 6. Preferably, the compression host 6 is a screw host. In this way, the use of a screw host as the compression host 6 of the magnetic air compressor of the utility model is simple to select, and convenient to assemble and control.

[0011] After the magnetic air compressor of the utility model is started, the auxiliary contacts of the contactor are energized to generate a magnetic field, and then the main contacts of the contactor are attracted, so that the motor of the magnetic pump is energized to start running; when the magnetic pump fails, the output power of the magnetic pump is abnormal, and the current of the motor increases. When the current value reaches the set current value of the thermal relay, the thermal relay trips, that is, disconnects, and the contactor loses power, thereby causing the main circuit to be disconnected, thereby achieving overload protection.

Claims

1. A magnetic air compressor, characterized in that: The magnetic air compressor comprises a magnetic pump, an oil and gas barrel and an electric control system, wherein the oil inlet of the magnetic pump is connected to the oil outlet of the oil and gas barrel, and the oil inlet of the magnetic pump is lower than the oil and gas barrel in the vertical direction; The electric control system is provided with a contactor and a thermal relay, which are located in the control circuit of the motor of the magnetic pump. When the control current in the control circuit reaches a set value, the thermal relay is disconnected, the contactor loses power and disconnects, and the motor in the magnetic pump stops working.

2. The magnetic air compressor according to claim 1, characterized in that: A cooling mechanism is provided in the magnetic air compressor, and the oil outlet of the oil and gas barrel is connected to the cooling oil inlet of the cooling mechanism through an oil delivery pipe, and the cooling oil outlet of the cooling mechanism is connected to the oil inlet of the magnetic pump through a cooling oil delivery pipe.

3. The magnetic air compressor according to claim 2, characterized in that: The cooling oil delivery pipe is provided with a Y-type filter, a magnetic ring and an oil filter in sequence, and the Y-type filter is close to the cooling mechanism, and the oil filter is close to the magnetic pump.

4. The magnetic air compressor according to any one of claims 1 to 3, characterized in that: The oil outlet of the magnetic pump is communicated with the oil inlet of the compression main engine through an oil delivery pipe, and a lubricating oil filter is arranged on the oil delivery pipe.

5. The magnetic air compressor according to claim 4, characterized in that: The compression main unit is a screw main unit.

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