CN111594461A - Heat exchange type speed-increasing air pump - Google Patents

Abstract

The invention relates to the technical field of centrifugal air compressors, in particular to a heat exchange type speed-increasing air pump. Including pump head, motor, the cooling water course has in the motor casing of motor, is different with prior art: a planetary friction roller type speed increaser is arranged in a front end cover of the motor, a motor shaft of the motor penetrates through the front end cover to be connected with a sun wheel of the speed increaser, and an output shaft of the speed increaser is connected with an impeller shaft of the pump head; lubricating oil circulates inside the speed increaser and inside the motor case. Compared with the prior art, the lubricating oil is introduced into the motor shell for circulation, and a water cooling system of the motor is used for heat exchange and cooling, so that the structure is compact, and the arrangement of pipelines is omitted. The lubricating oil is driven to circulate by utilizing pressure difference and gravity generated by oil splashing and/or centrifugal force of the speed increaser, so that a circulating oil way is simplified, and the speed increaser is convenient to process and assemble and is convenient to maintain later.

Description

A heat-exchange speed-increasing air pump

technical field

The invention relates to the technical field of centrifugal air compressors, in particular to a heat exchange type speed-increasing air pump.

Background technique

The working principle of the air pump is that the two impellers rotate in opposite directions. Because the gap between the impeller and the impeller, the impeller and the casing, and the impeller and the wall plate is extremely small, the air inlet forms a vacuum state, and the air enters under the action of atmospheric pressure. Intake cavity, and then, two of the blades of each impeller form a sealed cavity with the wall plate and the casing. During the rotation of the impeller, the air in the intake cavity is continuously brought to the exhaust by the sealed cavity formed by the two blades. The air cavity, and because the impellers in the exhaust cavity are meshed with each other, the air between the two blades is squeezed out, so that the continuous operation, the air is continuously transported from the air inlet to the air outlet.

The utility model patent with the publication number CN209687806U discloses an oil-free centrifugal air compressor for hydrogen fuel cells, which supplies air to the hydrogen fuel cell stack by driving the centrifugal supercharger to rotate after energizing the heat exchange high-speed motor. Since the patent uses the motor to directly drive the centrifugal supercharger to rotate, the rotation speed of the two impellers in the opposite direction is limited by the speed of the high-speed motor. To increase the power of the centrifugal supercharger, either increase the speed of the motor or add a speed increaser. The motor is originally a high-speed motor, and the space for increasing the speed is limited, and it also brings a series of problems such as heat dissipation, lubrication, vibration, and service life.

The invention patent of publication number CN1432721A discloses a speed increaser. Although the speed of the input shaft can be increased for a supercharger, because the speed increaser is a friction roller type, a large amount of Therefore, an oil pump coupled to the input shaft is also disclosed, which drives the lubricating oil to circulate in the gearbox casing and its interior, and lubricates and cools the power transmission mechanism such as the center roller. However, there are still problems such as complex structure, complex oil circuit design, and difficult processing and assembly. At the same time, because the lubricating oil only circulates in the outer casing and the interior of the speed increaser, and the path length is limited, the speed increaser generates a lot of heat during the high-speed friction operation, which is too late to dissipate. If it is led out of the pump body by a hose, and then returned to the pump body after cooling by the radiator, the structure is complicated and the volume is huge, and the customer needs to add a fan to dissipate heat, which increases the difficulty of the system layout.

SUMMARY OF THE INVENTION

In order to overcome one of the above-mentioned problems or problems of the prior art, the present invention discloses a heat-exchange type speed-increasing air pump, and the adopted technical scheme is:

A heat-exchange type speed-increasing air pump includes a pump head and a motor. The motor shell of the motor is provided with a cooling water channel. The difference from the prior art is that a planetary friction roller type speed-increasing device is arranged in the front end cover of the motor. The motor shaft of the motor is connected to the sun gear of the speed increaser through the front end cover, and the output shaft of the speed increaser is connected to the impeller shaft of the pump head; the lubricating oil is in the speed increaser Internal and internal circulation of the motor housing.

Further, the rear end cover of the motor includes a rear end cover A and a rear end cover B arranged at intervals, and an oil tank is formed between the rear end cover A and the rear end cover B; Oil return channel, a circulating oil channel is set in the motor shell, outside or inside the cooling water channel, an oil outlet channel is set in the front end cover, and the oil outlet channel connects the circulating oil channel and the inside of the speed increaser The centrifugal force generated by the rotation of the sun gear drives the lubricating oil to enter the oil tank through the oil outlet channel and the circulating oil channel, and the lubricating oil in the oil tank returns to the speed increaser through the oil return channel.

Further, multiple oil-displacing fan blades are evenly arranged on the end face and/or the circumferential surface of the sun gear.

Further, an oil filter is arranged in the oil tank.

Compared with the prior art, the beneficial effects of the present invention are:

1. The lubricating oil is introduced into the motor shell for circulation, and the water cooling system of the motor is used for heat exchange and cooling. The structure is compact and the layout of the pipeline is omitted.

2. The present invention utilizes the pressure difference and gravity generated by the oil splash and/or centrifugal force generated by the rotation of the speed increaser to drive the lubricating oil circulation, simplifying the circulating oil circuit, facilitating processing and assembly, and subsequent maintenance.

3. An oil storage chamber is designed behind the motor, which increases the recyclable amount of lubricating oil and meets the heat dissipation requirements of lubrication. An oil filter is set inside the oil storage chamber to filter out impurities and dirt in the lubricating oil and ensure the supply of the speed increaser. Lubricating oil is clean. The filter is designed in the oil cavity at the rear end of the motor, which is convenient for replacement and maintenance.

4. The cooling water circuit of the motor shell is parallel to the lubricating oil circulating oil passage, which plays a dual role of cooling the stator coil of the motor and cooling the lubricating oil.

5. The lubricating oil passes through the middle of the motor shaft, which can cool the bearing of the motor and solve the problem of local overheating of the bearing of the high-speed motor.

Description of drawings

Figure 1 is a schematic structural diagram of the present invention.

Detailed ways

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " The orientation or positional relationship indicated by "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise", etc. is based on The orientation or positional relationship shown in the drawings is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as Limitations of the present invention.

In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise expressly defined.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrally connected; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

As shown in FIG. 1 , a heat-exchange-type speed-increasing air pump includes a pump head 1 and a motor 2. A cooling water channel 26 is provided in a motor shell 22 of the motor 2, and a planetary planet is arranged in a front end cover 28 of the motor 2. Friction roller type speed increaser 3, the motor shaft 21 of the motor 2 is connected to the sun gear 31 of the speed increaser 3 through the front end cover 28, and the output shaft of the speed increaser 3 is connected to the pump head 1; the lubricating oil circulates inside the speed increaser 3 and inside the motor housing 22.

Specifically, the rear end cover of the motor 2 includes a rear end cover A23 and a rear end cover B24 arranged at intervals, and an oil tank 5 is formed between the rear end cover A23 and the rear end cover B24; the motor shaft 21 is opened through the Oil return passages 25 at the front and rear ends, a circulating oil passage 27 is provided in the motor housing 22 and outside the cooling water passage 26, and an oil outlet passage 29 is provided in the front end cover 28, and the oil outlet passage 29 communicates with the circulating oil 27 and the inside of the speed increaser 3; the centrifugal force generated by the rotation of the sun gear 31 drives the lubricating oil to enter the oil tank 5 through the oil outlet channel 29 and the circulating oil channel 27, and the lubricating oil in the oil tank 5 passes through the The oil return passage 25 returns to the speed increaser 3 .

Six oil-displacing fan blades 32 are evenly arranged on the end surface of the sun gear 31 . An oil filter 6 is arranged in the oil tank 5 .

The above are only preferred embodiments of the present invention, and do not limit the present invention in any form; any person skilled in the art, without departing from the scope of the technical solution of the present invention, can use the above disclosed Methods and technical contents make many possible changes or modifications to the technical solutions of the present invention, or modify them into equivalent embodiments of equivalent changes. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims (4)

1. A heat-exchanging speed-increasing air pump, comprising a pump head (1) and a motor (2), wherein a cooling water channel (26) is provided in a motor casing (22) of the motor (2), characterized in that: The front end cover (28) of the motor (2) is provided with a planetary friction roller type speed increaser (3), and the motor shaft (21) of the motor (2) passes through the front end cover (28) to connect the speed increaser (3). The sun gear (31) of the speed increaser (3), the output shaft of the speed increaser (3) is connected to the impeller shaft of the pump head (1); the lubricating oil is inside the speed increaser (3) and the The motor housing (22) circulates inside. 2. The heat-exchange type speed-increasing air pump according to claim 1, wherein the rear end cover of the motor (2) comprises a rear end cover A (23) and a rear end cover B (24) arranged at intervals ), an oil tank (5) is formed between the rear end cover A (23) and the rear end cover B (24); the motor shaft (21) has an oil return channel (25) running through its front and rear ends, and the motor shaft (21) A circulating oil passage (27) is arranged in the casing (22) and on the outer side or inner side of the cooling water passage (26), and an oil outlet passage (29) is provided in the front end cover (28), and the oil outlet passage (29) communicates with the The circulating oil passage (27) and the inside of the speed increaser (3); the centrifugal force generated by the rotation of the sun gear (31) drives the lubricating oil to enter the oil outlet through the oil outlet passage (29) and the circulating oil passage (27). The oil tank (5), the lubricating oil in the oil tank (5) is returned to the speed increaser (3) through the oil return passage (25). 3 . The heat-exchanging speed-increasing air pump according to claim 2 , characterized in that: multiple oil-displacing fan blades ( 32 ) are evenly arranged on the end surface and/or the circumferential surface of the sun gear ( 31 ). 4 . 4 . The heat-exchanging speed-increasing air pump according to claim 2 , wherein an oil filter ( 6 ) is arranged in the oil tank ( 5 ). 5 .

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