CN111503033A

CN111503033A - Forced heat exchange type speed-increasing air pump

Info

Publication number: CN111503033A
Application number: CN202010452596.4A
Authority: CN
Inventors: 邢子义; 王升科; 张会明; 张超
Original assignee: Yantai Dongde Industrial Co Ltd
Current assignee: Yantai Dongde Industrial Co Ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2020-08-07

Abstract

The invention relates to the technical field of centrifugal air compressors, in particular to a forced heat exchange type acceleration air pump, which comprises a pump head and a water-cooled motor, and is different from the prior art in that: a planetary friction roller type speed increaser is arranged in a front end cover of the motor, a motor shaft of the motor has double outlet ends, the front outlet end of the motor shaft is connected with a sun gear of the speed increaser, and an output shaft of the speed increaser is connected with an impeller shaft of the pump head; and the rear outlet of the motor shaft is connected with an oil pump, and the oil pump drives lubricating oil to circulate inside the speed increaser and the motor shell of the motor. Compared with the prior art, the lubricating oil is introduced into the motor shell for circulation, the water cooling system of the motor is used for cooling, the structure is compact, and the arrangement of pipelines is omitted.

Description

Forced heat exchange type speed-increasing air pump

Technical Field

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

Background

The centrifugal air pump has the working principle that when the impeller rotates at high speed, gas is thrown into a diffuser behind the impeller under the action of centrifugal force along with the rotation of the impeller, a vacuum zone is formed at the impeller, and then outside fresh gas enters the impeller. The impeller is continuously rotated and gas is continuously sucked and thrown out, thereby maintaining continuous flow of gas.

Publication No. CN209687806U discloses an oilless centrifugal air compressor for hydrogen fuel cell, which supplies air to the hydrogen fuel cell stack by driving a centrifugal supercharger to rotate after powering on a water-cooled high-speed motor. Because this patent uses the motor to directly drive centrifugal booster and rotates, two impeller pivoted rotational speeds in opposite directions are subject to high-speed motor's rotational speed, will improve centrifugal booster's power, or improve the rotational speed of motor, or add the speed increaser. The motor is originally a high-speed motor, the space for increasing the rotating speed is limited, and a series of problems of heat dissipation, lubrication, vibration, service life and the like are caused.

The invention of publication No. CN1432721A discloses a speed increasing machine for a supercharger capable of increasing the speed of an input shaft, which is of a friction roller type and generates a large amount of heat during a high-speed friction operation, and an oil pump coupled to the input shaft for driving a lubricating oil to circulate in a speed increasing machine casing and the inside thereof and lubricating and cooling a power transmission mechanism such as a center roller. But still has the problem that the structure is complicated, and the oil circuit design is complicated, and the processing assembly is difficult. Meanwhile, as the lubricating oil only circulates in the shell and the inside of the speed increaser, the path length is limited, a large amount of heat generated by the speed increaser is not dissipated in time in the high-speed friction running process, and high temperature is easily caused, so that the lubrication is ineffective, and the service life of the whole machine is influenced. If the pump body is led out of the pump body by a hose and then returns to the pump body after being cooled by a radiator, the structure is complex, the size is large, a fan is required to be additionally arranged by a client for radiating heat, and the difficulty of system layout is increased.

Disclosure of Invention

In order to overcome one of the problems or problems in the prior art, the invention discloses a forced heat exchange type speed-increasing air pump, which adopts the technical scheme that:

a forced heat exchange type speed-increasing air pump comprises a pump head and a water-cooled motor, and is different from the prior art in that: a planetary friction roller type speed increaser is arranged in a front end cover of the motor, a motor shaft of the motor has double outlet ends, the front outlet end of the motor shaft is connected with a sun gear of the speed increaser, and an output shaft of the speed increaser is connected with an impeller shaft of the pump head; and the rear outlet of the motor shaft is connected with an oil pump, and the oil pump drives lubricating oil to circulate inside the speed increaser and the motor shell of the motor.

Furthermore, the rear end cover of the motor comprises a rear end cover A and a rear end cover B which are arranged at intervals, the rear outlet of the motor shaft is arranged on the rear end cover A, and an oil tank is formed between the rear end cover A and the rear end cover B; the motor shaft is provided with oil passing holes penetrating through the front end and the rear end of the motor shaft, a circulating oil passage is arranged in the motor shell and on the outer side or the inner side of the cooling water channel, an oil return passage is arranged in the front end cover, and the oil return passage is communicated with the circulating oil passage and the inside of the speed increaser; the oil pump drives lubricating oil in the oil tank to enter the speed increaser through the oil passing hole, and the lubricating oil in the speed increaser returns to the oil tank through the oil return channel and the circulating oil duct.

Further, an oil filter is arranged on an oil inlet of the oil pump.

Further, the oil pump is a gear pump, a cam pump or a trochoid pump.

Compared with the prior art, the invention has the beneficial effects that:

1. lubricating oil is introduced into the motor shell for circulation, a water cooling system of the motor is used for cooling, the structure is compact, and the arrangement of pipelines is omitted.

2. The invention arranges the oil pump behind the motor, on one hand, the length of the cantilever from the front end of the motor shaft to the speed increaser is shortened, and the rigidity is improved. On the other hand, the circulating oil way is simplified, and the processing and the assembly are convenient, and the later maintenance is convenient.

3. The design has the oil storage chamber at the back of the motor, has promoted the circulated quantity of lubricating oil, satisfies lubricated heat dissipation demand, and the entry of the inside UNICOM oil pump in oil storage chamber sets up oily filter, filters impurity and dirt in the lubricating oil, guarantees to supply with the clean cleanness of lubricating oil of speed increaser. The filter is designed in the oil cavity at the rear end of the motor, so that the replacement and maintenance are convenient.

4. The cooling water route of motor casing is parallelly with lubricating oil circulation oil duct, plays the dual function of cooling motor stator coil and cooling lubricating oil promptly.

5. Lubricating oil passes through in the middle of the motor shaft, can be for the bearing cooling of motor, has solved the local overheated problem of high-speed motor bearing.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

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

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The forced heat exchange type speed-increasing air pump shown in fig. 1 comprises a pump head 1 and a water-cooled motor 2, wherein a planetary friction roller type speed-increasing gear 3 is arranged in a front end cover 28 of the motor 2, a motor shaft 21 of the motor 2 has double outlet ends, the front outlet end of the motor shaft 21 is connected with a sun gear of the speed-increasing gear 3, and an output shaft of the speed-increasing gear 3 is connected with an impeller shaft of the pump head 1; an oil pump 4 is connected to the rear end of the motor shaft 21, and the oil pump 4 drives lubricating oil to circulate inside the speed increaser 3 and the motor casing 22 of the motor 2.

Specifically, the rear end cover of the motor 2 comprises a rear end cover A23 and a rear end cover B24 which are arranged at intervals, the rear end of the motor shaft 21 is connected with the rear end cover A23, and an oil tank 5 is formed between the rear end cover A23 and the rear end cover B24; the motor shaft 21 is provided with oil passing holes 25 penetrating through the front end and the rear end of the motor shaft, a circulating oil passage 27 is arranged in the motor shell 22 and outside the cooling water passage 26, an oil return passage 29 is arranged in the front end cover 28, and the oil return passage 29 is communicated with the circulating oil passage 27 and the inside of the speed increaser 3; the oil pump 4 drives the lubricating oil in the oil tank 5 to enter the speed-increasing gearbox 3 through the oil passing hole 25, and the lubricating oil in the speed-increasing gearbox 3 returns to the oil tank 5 through the oil return channel 29 and the circulating oil channel 27.

The oil pump 4 is a cam pump, and an oil filter 6 is arranged on an oil inlet of the cam pump.

The foregoing is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way; those skilled in the art can make many possible variations or modifications to the invention using the methods and techniques disclosed above, or to modify equivalent embodiments without departing from the scope of the invention. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention.

Claims

1. The utility model provides a force heat transfer formula acceleration rate air pump, includes pump head (1), water-cooled motor (2), its characterized in that: a planetary friction roller type speed increaser (3) is arranged in a front end cover (28) of the motor (2), a motor shaft (21) of the motor (2) has double outlets, the front outlet of the motor shaft (21) is connected with a sun gear of the speed increaser (3), and an output shaft of the speed increaser (3) is connected with an impeller shaft of the pump head (1); an oil pump (4) is connected to the rear outlet of the motor shaft (21), and the oil pump (4) drives lubricating oil to circulate inside the speed increaser (3) and the motor shell (22) of the motor (2).

2. A forced heat exchange type booster air pump according to claim 1, characterized in that: the rear end cover of the motor (2) comprises a rear end cover A (23) and a rear end cover B (24) which are arranged at intervals, the rear end of the motor shaft (21) is connected with the rear end cover A (23), and an oil tank (5) is formed between the rear end cover A (23) and the rear end cover B (24); the motor shaft (21) is provided with oil passing holes (25) penetrating through the front end and the rear end of the motor shaft, a circulating oil passage (27) is arranged in the motor shell (22) and on the outer side or the inner side of the cooling water passage (26), an oil return passage (29) is arranged in the front end cover (28), and the oil return passage (29) is communicated with the circulating oil passage (27) and the inside of the speed increaser (3); the oil pump (4) drives lubricating oil in the oil tank (5) to enter the speed increaser (3) through the oil passing hole (25), and the lubricating oil in the speed increaser (3) returns to the oil tank (5) through the oil return channel (29) and the circulating oil duct (27).

3. A forced heat exchange accelerated air pump according to claim 1 or 2, characterized in that: an oil filter (6) is arranged on an oil inlet of the oil pump (4).

4. A forced heat exchange accelerated air pump according to claim 1 or 2, characterized in that: the oil pump (4) is a gear pump, a cam pump or a trochoid pump.