阅读说明：本技术 一种无油涡旋真空泵偏心主轴自驱动冷却装置及使用方法 (Self-driven cooling device for eccentric main shaft of oil-free scroll vacuum pump and use method ) 是由 杨广衍 宁宪宁 于 2021-01-28 设计创作，主要内容包括：一种无油涡旋真空泵偏心主轴自驱动冷却装置及使用方法,包括偏心主轴；偏心主轴一端连接有冷却风扇Ⅰ,冷却风扇Ⅰ通过轴端挡圈Ⅰ、通孔螺钉及垫圈、圆螺母及圆螺母用止动垫圈或套装在偏心主轴上的轴端挡圈Ⅱ固定在偏心主轴端部,偏心主轴另一端连接有冷却风扇Ⅱ且与驱动电机连接,在冷却风扇Ⅱ的扇叶轮的径向开设有与偏心主轴的冷却气流通道连通的冷却气流进口,所述冷却风扇Ⅰ和冷却风扇Ⅱ的叶片采用圆弧叶片、阿基米德螺线型叶片或渐开线型叶片。由冷却风扇带入的冷却空气直接进入偏心主轴的冷却气流通道,去除涡旋边缘吸入的气体在被逐渐压缩到涡旋盘中心区域时产生的热量,进而延长真空泵的工作寿命。(An oil-free scroll vacuum pump eccentric main shaft self-driven cooling device and a use method thereof comprise an eccentric main shaft; one end of the eccentric main shaft is connected with a cooling fan I, the cooling fan I is fixed at the end part of the eccentric main shaft through a shaft end check ring I, a through hole screw and a washer, a stop washer for a round nut and a round nut or a shaft end check ring II sleeved on the eccentric main shaft, the other end of the eccentric main shaft is connected with a cooling fan II and connected with a driving motor, a cooling airflow inlet communicated with a cooling airflow channel of the eccentric main shaft is radially arranged on a fan blade wheel of the cooling fan II, and blades of the cooling fan I and the cooling fan II are arc blades, Archimedes spiral blades or involute blades. The cooling air brought by the cooling fan directly enters the cooling air flow channel of the eccentric main shaft, so that the heat generated when the air sucked by the vortex edge is gradually compressed to the central area of the vortex disc is removed, and the service life of the vacuum pump is further prolonged.)

1. An oil-free scroll vacuum pump eccentric main shaft self-driven cooling device is characterized by comprising an eccentric main shaft with an internal hollow cooling airflow channel, a cooling fan I, a cooling fan II and a driving motor; the excircle of one end of the eccentric main shaft is connected with a cooling fan I through a key, the cooling fan I is fixed on the end part of the eccentric main shaft through a shaft end check ring I, a through hole screw and a gasket, the cooling fan I is fixed on the end part of the eccentric main shaft through a round nut and a round nut by a stop gasket or the cooling fan I is fixed through a shaft end check ring II sleeved on the eccentric main shaft, the excircle of the other end of the eccentric main shaft is connected with a cooling fan II through a key, the cooling fan II is fixed on the end part of the other end of the eccentric main shaft through a shaft end check ring, a screw and a gasket, a cooling airflow inlet is arranged in the radial direction of the impeller of the cooling fan II and is communicated with the cooling airflow channel of the eccentric main shaft, the blades of the cooling fan I and the cooling fan II are arc blades, Archimedes spiral blades or involute blades.

2. The self-driven cooling device for the eccentric main shaft of the oil-free scroll vacuum pump according to claim 1, characterized in that: the eccentric main shaft is provided with cooling airflow channels along the radial direction and the axial direction, and the radial cooling airflow channel is communicated with the axial cooling airflow channel; and the radial cooling airflow inlets of the cooling fan II correspond to the radial cooling airflow channels of the eccentric main shaft and are the same in number.

3. The oil-free scroll vacuum pump eccentric main shaft self-driven cooling device according to claim 2, characterized in that: and the cooling fan II is provided with 1-4 radial cooling airflow channels along the circumferential direction.

4. The self-driven cooling device for the eccentric main shaft of the oil-free scroll vacuum pump according to claim 1, characterized in that: the utility model provides an eccentric main shaft self-driven cooling device of oilless vortex vacuum pump still includes moves the vortex dish, decides the vortex dish outward and interior fixed vortex dish, install through the bearing on the eccentric main shaft and move the vortex dish, decide vortex dish and interior fixed vortex dish outward, and decide the vortex dish outward and set up with interior fixed vortex dish lock and its internally mounted moves the vortex dish.

5. The use method of the self-driven cooling device for the eccentric main shaft of the oil-free scroll vacuum pump according to claim 4 is characterized by comprising the following steps:

a movable scroll having a double-sided symmetrical scroll wall extending from a central portion of a scroll base plate toward an outer periphery; the outer fixed scroll and the inner fixed scroll are oppositely arranged to form a pump working cavity, and both the outer fixed scroll and the inner fixed scroll are provided with scroll type disc walls extending from the central part of a scroll bottom plate to the periphery; the eccentric main shaft is driven by an external motor to drive the movable scroll plate to do plane motion in the working cavity of the pump; the two ends of the eccentric main shaft are respectively provided with a cooling fan I and a cooling fan II, wherein the cooling fan II is connected with the driving motor through a coupler, the eccentric main shaft is driven to rotate by the driving motor, and the movable scroll plate is driven by the eccentric main shaft to do plane motion under the limitation of three eccentric crank pins, so that the working process of the oil-free scroll vacuum pump is realized; in the whole working process, heat generated by the compression of gas and the friction of the end sealing parts of the movable scroll plate, the outer fixed scroll plate and the inner fixed scroll plate is conducted to the eccentric main shaft and the bearing on the eccentric main shaft, so that the temperature of the bearing is increased, the blades have the functions of increasing airflow pressure and flow velocity to the central part of the impeller by the design form of the curved surface of the impeller blade of the cooling fan II at the connecting side of the eccentric main shaft and the driving motor, cooling air with increased pressure and flow velocity enters the cooling airflow channel in the eccentric main shaft through the cooling airflow inlet, takes away the heat on the eccentric main shaft, and flows out from the cooling airflow outlet at one end of the cooling fan I, so that the effect of cooling the bearing on the eccentric main shaft and the eccentric main shaft is achieved.

Technical Field

The invention belongs to the technical field of vacuum pump cooling, and particularly relates to an eccentric main shaft self-driven cooling device of an oil-free scroll vacuum pump and a using method of the eccentric main shaft self-driven cooling device.

Background

In the working process of the existing oil-free scroll vacuum pump, friction heat is generated due to the friction between the sealing strip at the end part of the mutually meshed scroll and the bottom plate of the scroll plate, so that a main shaft of the oil-free scroll vacuum pump is overheated, and lubricating grease in a bearing is gasified, thereby damaging the bearing.

Disclosure of Invention

Aiming at the defects of the prior art, the invention adopts the following technical scheme:

an oil-free scroll vacuum pump eccentric main shaft self-driven cooling device comprises an eccentric main shaft with an internal hollow cooling airflow channel, a cooling fan I, a cooling fan II and a driving motor; the excircle of one end of the eccentric main shaft is connected with a cooling fan I through a key, the cooling fan I is fixed on the end part of the eccentric main shaft through a shaft end check ring I, a through hole screw and a gasket, the cooling fan I is fixed on the end part of the eccentric main shaft through a round nut and a round nut by a stop gasket or the cooling fan I is fixed through a shaft end check ring II sleeved on the eccentric main shaft, the excircle of the other end of the eccentric main shaft is connected with a cooling fan II through a key, the cooling fan II is fixed on the end part of the other end of the eccentric main shaft through a shaft end check ring, a screw and a gasket, a cooling airflow inlet is arranged in the radial direction of the impeller of the cooling fan II and is communicated with the cooling airflow channel of the eccentric main shaft, the blades of the cooling fan I and the cooling fan II are arc blades, Archimedes spiral blades or involute blades.

The eccentric main shaft is provided with cooling airflow channels along the radial direction and the axial direction, and the radial cooling airflow channel is communicated with the axial cooling airflow channel; and the radial cooling airflow inlets of the cooling fan II correspond to the radial cooling airflow channels of the eccentric main shaft and are the same in number.

And the cooling fan II is provided with 1-4 radial cooling airflow channels along the circumferential direction.

The utility model provides an eccentric main shaft self-driven cooling device of oilless vortex vacuum pump still includes moves the vortex dish, decides the vortex dish outward and interior fixed vortex dish, install through the bearing on the eccentric main shaft and move the vortex dish, decide vortex dish and interior fixed vortex dish outward, and decide the vortex dish outward and set up with interior fixed vortex dish lock and its internally mounted moves the vortex dish.

A use method of an oil-free scroll vacuum pump eccentric main shaft self-driven cooling device comprises the following steps:

a movable scroll having a double-sided symmetrical scroll wall extending from a central portion of a scroll base plate toward an outer periphery; the outer fixed scroll and the inner fixed scroll are oppositely arranged to form a pump working cavity, and both the outer fixed scroll and the inner fixed scroll are provided with scroll type disc walls extending from the central part of a scroll bottom plate to the periphery; the eccentric main shaft is driven by an external motor to drive the movable scroll plate to do plane motion in the working cavity of the pump; the two ends of the eccentric main shaft are respectively provided with a cooling fan I and a cooling fan II, wherein the cooling fan II is connected with the driving motor through a coupler, the eccentric main shaft is driven to rotate by the driving motor, and the movable scroll plate is driven by the eccentric main shaft to do plane motion under the limitation of three eccentric crank pins, so that the working process of the oil-free scroll vacuum pump is realized; in the whole working process, heat generated by the compression of gas and the friction of the end sealing parts of the movable scroll plate, the outer fixed scroll plate and the inner fixed scroll plate is conducted to the eccentric main shaft and the bearing on the eccentric main shaft, so that the temperature of the bearing is increased, the blades have the functions of increasing airflow pressure and flow velocity to the central part of the impeller by the design form of the curved surface of the impeller blade of the cooling fan II at the connecting side of the eccentric main shaft and the driving motor, cooling air with increased pressure and flow velocity enters the cooling airflow channel in the eccentric main shaft through the cooling airflow inlet, takes away the heat on the eccentric main shaft, and flows out from the cooling airflow outlet at one end of the cooling fan I, so that the effect of cooling the bearing on the eccentric main shaft and the eccentric main shaft is achieved.

The invention has the beneficial effects that:

the device is at oil-free vortex vacuum pump evacuation during operation, the cooling air that is brought in by cooling fan I and cooling fan II directly gets into eccentric main shaft's inside hollow cooling air flow passageway, can get rid of vortex edge inspiratory gas by the in-process production of compressing gradually to vortex dish central zone, effectively cool off eccentric main shaft, a bearing, the bearing seal with move the vortex dish, reduce the operating temperature of oil-free vortex vacuum pump intracavity, cool off the pump head in the evacuation, reach the purpose that prolongs oil-free vortex vacuum pump working life.

Drawings

FIG. 1 is a schematic view of a self-driven cooling device of an eccentric main shaft of an oil-free scroll vacuum pump according to embodiment 1 of the present invention;

FIG. 2 is a side view of a fan wheel of a cooling fan II of an eccentric main shaft self-driven cooling device of an oil-free scroll vacuum pump in accordance with embodiment 1 of the present invention;

FIG. 3 is a top view of a fan wheel of a cooling fan II of the eccentric spindle self-driven cooling device of the oil-free scroll vacuum pump in embodiment 1 of the present invention;

FIG. 4 is a schematic diagram of the number of cooling air inlets of a cooling fan II of an eccentric main shaft self-driven cooling device of an oil-free scroll vacuum pump in embodiment 1 of the present invention;

FIG. 5 is an overall schematic view of an integrated machine provided with an oil-free vortex vacuum eccentric main shaft self-driven cooling device in embodiment 1 of the present invention;

FIG. 6 is a schematic view of a self-driven cooling device of an eccentric main shaft of an oil-free scroll vacuum pump in embodiment 2 of the present invention;

fig. 7 is a schematic view of a self-driven cooling device of an eccentric main shaft of an oil-free scroll vacuum pump in embodiment 3 of the present invention.

1-eccentric main shaft, 2-shaft end retainer ring I, 3-through hole screw, 4-gasket, 5-cooling fan I, 6-cooling fan II, 7-outer fixed scroll, 8-inner fixed scroll, 9-movable scroll, 10-driving motor, 11-coupler, 12-cooling air flow channel, 13-round nut, 14-stop gasket for round nut, 15-shaft end retainer ring II, 16-cooling air flow inlet.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in fig. 1 to 5, the self-driven cooling device for the eccentric main shaft of the oil-free scroll vacuum pump comprises an eccentric main shaft 1 with an internal hollow cooling airflow channel 12, a cooling fan I5, a cooling fan II 6 and a driving motor 10; the outer circle of one end of the eccentric main shaft 1 is connected with a cooling fan I5 through a key, the cooling fan I5 is fixed on the end part of the eccentric main shaft 1 through a shaft end check ring I2, a through hole screw 3 and a gasket 4, the outer circle of the other end of the eccentric main shaft 1 is connected with a cooling fan II 6 through a key, the cooling fan II 6 is fixed on the end part of the other end of the eccentric main shaft 1 through a shaft end check ring, a screw and a gasket, the eccentric main shaft 1 on one side of the cooling fan II 6 is connected with a driving motor 10 through a coupler 11, a cooling air flow inlet 16 is formed in the radial direction of a fan wheel of the cooling fan II 6 and is; the blades of the cooling fan I5 and the cooling fan II 6 are arc blades, Archimedes spiral blades or involute blades; the cooling fan I5 and the cooling fan II 6 are arranged in a blade form for increasing pressure to the central part of the impeller, so that an airflow channel is generated in an airflow channel at the central part of the main shaft, the heat on the main shaft is taken away, the temperature of the main shaft is reduced, and the service life of a bearing is prolonged.

The eccentric main shaft 1 is provided with cooling airflow channels 12 along the radial direction and the axial direction, and the radial cooling airflow channels 12 are communicated with the axial cooling airflow channels 12; the radial cooling airflow inlets 16 of the cooling fans II 6 correspond to the radial cooling airflow channels 12 of the eccentric main shaft 1, and the number of the radial cooling airflow inlets is the same.

The cooling fan II 6 is provided with 1 radial cooling airflow channel 12 along the circumferential direction.

An oil-free vortex vacuum eccentric main shaft 1 self-driven cooling device is still including moving vortex dish 9, deciding vortex dish 7 and interior fixed vortex dish 8 outward, install through the bearing on eccentric main shaft 1 and move vortex dish 9, decide vortex dish 7 and interior fixed vortex dish 8 outward, and decide vortex dish 7 and interior fixed vortex dish 8 lock set up and its internally mounted has and moves vortex dish 9 outward.

A use method of an oil-free scroll vacuum pump eccentric main shaft self-driven cooling device comprises the following steps:

an orbiting scroll 9 having a double-sided symmetrical scroll wall extending from the center portion of the scroll base plate toward the outer periphery; the vortex pump comprises an outer fixed vortex plate 7 and an inner fixed vortex plate 8 which are oppositely arranged to form a pump working cavity, wherein the outer fixed vortex plate 7 and the inner fixed vortex plate 8 are both provided with vortex type plate walls extending from the central part of a vortex plate bottom plate to the periphery; the eccentric main shaft 1 is driven by an external motor to drive the movable scroll 9 to do plane motion in the pump working cavity; the two ends of the eccentric main shaft 1 are respectively provided with a cooling fan I5 and a cooling fan II 6, wherein the cooling fan II 6 is connected with a driving motor 10 through a coupler 11, the eccentric main shaft 1 is driven to rotate under the driving of the driving motor 10, and the movable scroll plate 9 is driven by the eccentric main shaft 1 to do plane motion under the limitation of three eccentric crank pins, so that the working process of the oil-free scroll vacuum pump is realized; in the whole working process, heat generated by the compression of gas and the friction of end sealing parts of the movable scroll 9, the outer fixed scroll 7 and the inner fixed scroll 8 is conducted to the eccentric main shaft 1 and a bearing on the eccentric main shaft 1, so that the temperature of the bearing is increased, the blades have the functions of increasing airflow pressure and flow rate to the central part of the impeller by virtue of the design form of the curved surface of the impeller blade of the cooling fan II 6 on the connecting side of the eccentric main shaft 1 and the driving motor 10, cooling air with increased pressure and flow rate enters a cooling airflow channel 12 in the eccentric main shaft 1 through a cooling airflow inlet 16 to take away the heat on the eccentric main shaft 1, and flows out from a cooling airflow outlet at one end of the cooling fan I5 to play a role in cooling the eccentric main shaft 1 and the bearing on the eccentric main shaft 1.

Example 2

Embodiment 2 differs from embodiment 1 in that, as shown in fig. 6, a cooling fan i 5 is fixed to the end of an eccentric main shaft 1 by a round nut 13 and a lock washer 14 for the round nut.

Example 3

Embodiment 3 differs from embodiment 1 in that, as shown in fig. 7, the cooling fan i 5 is fixed by a shaft end retainer ii 15 fitted around the eccentric main shaft 1.