Electric lubricating pump as well as oil way control method thereof and lubricating device with electric lubricating pump

Abstract

The invention relates to an electric lubricating pump. The electric lubricating pump comprises an oil tank, an oil pump arranged in the oil tank, a motor in driving connection with the oil pump, a differential pressure type automatic reversing valve and an electromagnetic reversing valve, wherein an oil inlet of the differential pressure type automatic reversing valve is connected with an outlet of the oil pump; an oil returning opening is communicated with the oil tank; an oil outlet of the differential pressure type automatic reversing valve is connected with a main oil way connector; the oil outlet forms a main oil opening; the electromagnetic reversing valve is a two-position three-way reversing valve; an oil inlet of the electromagnetic reversing valve is connected with the oil outletof the differential pressure type automatic reversing valve; an oil returning opening of the electromagnetic reversing valve is communicated with the oil tank; and an oil outlet of the electromagnetic reversing valve forms an auxiliary oil opening. The electric lubricating pump can achieve pressure release of the auxiliary oil way when the electromagnetic reversing valve is powered on or not; andreliable unloading of the auxiliary oil way is guaranteed. The invention further relates to an oil way control method of the electric lubricating pump and a lubricating device using the electric lubricating pump. The lubricating device is simple to control and reliable in unloading work.

Description

technical field [0001] The invention relates to an electric lubricating pump, an oil circuit control method of the electric lubricating pump, and a lubricating device using the electric lubricating pump. Background technique [0002] The pressure relief electric lubrication pump is a kind of lubrication equipment, which is combined with the volumetric quantitative distributor to form an electric fixed-point quantitative centralized lubrication device. The two necessary conditions for the reliable operation of the electric fixed-point quantitative centralized lubrication device are: ①The quantitative distributor must have a high enough working pressure when filling oil, otherwise the piston of the quantitative distributor will not move in place, resulting in imperfect oil distribution; ②Automatic pressure relief when the pump stops There must be a low enough unloading pressure, otherwise the restoring force of the return spring of the quantitative distributor is small, and th...

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Problems solved by technology

That is to say, in order to ensure full unloading of the auxiliary oil circuit, the delayed power-off time of the electromagnetic reversing valve should also change with the change of the ambient temperature. Delay the valve for 30 seconds before turning off the power, and the auxiliary oil circuit can complete the pressure relief; when the ambient temperature is low in winter, after the oil pump motor is powered off, the electromagnetic reversing valve may have to delay for 300 seconds before turning off the power, otherwise it may be damaged. As a result, the unloading of the auxiliary oil circuit is insufficient, and the piston of the quantitative distributor of the auxiliary oil circuit does not reset or the reset is not perfect, which will cause the quantitative distributor of the auxiliary oil circuit to not separate oil or the oil distribution is incomplete in the next lubrication cycle

In addition, because the two-position two-way reversing valve 500 in this structure needs to be energized for a long time, it will also have an impact on its life.

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