WO2018161472A1

WO2018161472A1 - Self-circulation lubricating cooling system of vertical vacuum pump

Info

Publication number: WO2018161472A1
Application number: PCT/CN2017/090504
Authority: WO
Inventors: 徐曦; 朱红梅
Original assignee: 北京艾岗科技有限公司
Priority date: 2017-03-07
Filing date: 2017-06-28
Publication date: 2018-09-13
Also published as: CN106762668A; CN106762668B

Abstract

A self-circulation lubricating cooling system of a vertical vacuum pump, comprising a pump body (100), a rotor shaft (3), bearings (5), and a screw base (20). The rotor shaft (3) is vertically provided in the pump body (100), and both ends of the rotor shaft (3) are borne by the bearings (5) to rotate. A motor stator is fixed on the pump body (100) corresponding to a motor rotor (4). The screw base (20) is located below the rotor shaft (3) to isolate the pump body (100) to form a sealed oil tank below the pump body. The lower end of the rotor shaft (3) penetrates through the screw base (20). An oil inlet (31) is formed in the lower end face of the rotor shaft (3) for communicating with a self-circulation oil path in the rotor shaft (3). A sealed oil drum (9) is fixed at the lower end of the rotor shaft (3). Oil push wheels (10) are arranged at the bottom of the oil drum (9) and are immersed in an oil tank (102) below the pump body (100). The technical problems of discontinuous oil supply, large running noise, high manufacturing cost, and poor stability in a conventional lubrication method are solved.

Description

Vertical vacuum pump self-circulating lubrication cooling system

Technical field

The invention relates to a vertical vacuum pump self-circulating lubrication cooling system.

Background technique

At present, the traditional lubrication method is grease lubrication or regular lubrication of the fuel filler port. In this way, the gear is lubricated or immersed and lubricated. The position of the lubricant submerges about 1/3 of the gear, which is usually used in textbooks and standard. the design of. The specific disadvantage is that grease or lubricating oil is added to the bearing position on a regular basis. Due to the lack of continuous lubrication and cooling process, the bearing life is usually short and the noise of the pump operation is relatively large.

Lubrication is carried out by means of a circulating pump pumping oil from the fuel tank. This method can ensure continuous lubrication of bearings and gears. The disadvantage is that the structure is too complicated, and it is necessary to provide a circulating pump and a matching circulation line, resulting in a large manufacturing cost. If the equipment is damaged, the whole machine will be damaged due to the damage of the oil supply pump, which will reduce the reliability of the equipment operation. For this reason, a vertical vacuum pump self-circulating lubrication cooling system is needed to solve the technical problem that the conventional lubrication method has discontinuous oil supply, large running noise, high manufacturing cost and poor stability.

Summary of the invention

The object of the present invention is to provide a vertical vacuum pump self-circulating lubrication cooling system to solve the technical problem that the conventional lubrication mode is discontinuous in oil supply, large in operation noise, high in manufacturing cost, and poor in stability.

The invention adopts the following technical solutions:

A vertical vacuum pump self-circulating lubrication cooling system, comprising a pump body (100), a rotor shaft (3), a bearing (5), a screw base (20), a fuel tank (102), a self-circulating oil circuit, and the rotor shaft ( 3) vertically disposed in the pump body (100), the two ends of the rotor shaft (3) are supported and rotated by a bearing (5), a self-circulating oil passage is provided with an axially deep hole (2) in the rotor shaft (3), the upper end of the deep hole is a blind hole, and the deep hole is under the rotor shaft (3) The end surface is provided with an opening; the deep hole is sleeved with a long tubular mandrel (13), and the top end and the bottom end of the mandrel (13) are coaxially disposed with a cylindrical shape convexly protruding from the mandrel (13) Positioning the upper seat (131) and positioning the lower seat (1311), the top of the positioning upper seat (131) and the wall of the cylinder abut against the top and inner walls of the deep hole, the outer wall of the mandrel (13) and the deep hole An annular gap is formed between the inner walls to form a vertical oil chamber (14), and the outer wall of the positioning upper seat (131) is uniformly provided with an axial groove along the circumference, and the mandrel is disposed in the groove ( 13) A gap (132) communicating in the tube, the bottom end of the vertical oil chamber (14) being closed by a positioning lower seat (1311), the lower port of the mandrel (13) being an oil inlet (31), lateral The oil passages are respectively disposed above and below the lower end bearing, and constitute an upper first oil passage (6) and a lower second oil passage (7) and communicate with the internal vertical oil chamber (14) , the self-circulating oil routes the core The oil inlet (31) of (13) to the mandrel (13) in the tube is turned up through the gap (132) of the top, passing through the vertical oil chamber (14) and from the upper end The first lateral oil passage flows into the bearing for lubrication and then flows downward, and merges with the oil return flowing from the second lateral oil passage at the lower end to flow back to the oil tank (102);

The fuel tank (102) is outsourced with a water cooling system (103).

The screw base (20) of the disc type is located below the rotor shaft (3), the screw base (20) is provided with a shaft hole corresponding to the rotor shaft (3), and the upper part of the screw base (20) is sleeved Outside the rotor shaft (3), a lower portion thereof is sleeved outside the bearing (5) and fixed; the upper end of the screw base (20) is connected to a bottom end of the pump body (100), and the pump body is (100) inner chamber bottom seal; the lower end of the screw base (20) is connected to the edge of the oil tank (102) to seal the upper port of the oil tank (102); the rotor shaft (3) and the screw A sealing member is disposed between the shaft holes of the base (20); a lower end of the rotor shaft (3) passes through the screw base (20) into the oil tank (102), and the rotor shaft (3) is located at a lower end bearing A closed oil sump (9) is fixed underneath, and a pusher wheel (10) is arranged at the bottom of the simmering oil barrel (9). The pusher (10) is immersed in the lubricating oil liquid of the oil tank (102);

An upper end surface of the cylindrical interface (16) of the oil sump (9) is abutted against a lower bottom surface of the inner ring of the lower end bearing, and a lock nut is sleeved on the rotor shaft (3) inside the oil sump (9) (17) The upper end surface of the lock nut (17) abuts against the lower end surface of the top surface of the oil sump (9) and clamps and fixes the oil sump (9).

A filter screen (12) is fixed to the bottom surface of the pusher wheel (10).

The oil sump (9) is a top closed barrel-shaped empty shell, and an upper cylindrical end surface of the top surface of the oil sump (9) is provided with an integral cylindrical interface (16) and communicates with the interior thereof, the cylindrical shape An outer casing (16) is fixed at a lower end of the rotor shaft (3), and a bottom surface of the oil sump (9) is provided with a circular through hole (91), and the circular through hole (91) is disposed on a lower end surface thereof. There is an annular groove (92), the pusher (10) is butterfly-shaped and lies in the annular groove (92), and the pusher (10) is fixed to the oil sump by a collar provided below ( 9) bottom; the center of the pusher (10) is a center column (110), the center column (110) is coaxially jacketed with an annular ring (111), and the central column (110) and the annular ring (111) The peripheral ring is provided with the same direction of the blade (112) forming a butterfly-shaped integral structure.

The first lateral oil passage (6) and the second lateral oil passage (7) are plural and disposed along a circumference of the rotor shaft (3).

The vacuum pump is a screw pump or a claw pump.

The deep hole is cylindrical, the mandrel is a circular hollow tube, and the positioning upper seat and the positioning lower seat are cylindrical.

The rotor shaft below the upper end bearing is fixedly sleeved with a motor rotor (4), and the motor stator is provided with a motor stator, and the deep hole extends upward to the rotor shaft provided with the motor rotor (4) (3) )top.

The advantages of the invention are as follows:

1. Achieve continuous oil lubrication, greatly extending the service life of the bearing.

2. There is no need to add an additional oil pump and circulation system, as well as an external power supply. Especially in the use of flammable and explosive environmental conditions, the manufacturing costs have been greatly reduced. At the same time, damage due to damage to the circulation pump is avoided.

3. The cooling of the rotor shaft is realized, the thermal expansion variation of the rotor shaft is greatly reduced, thereby greatly reducing the probability of mechanical failure of the pump and reducing the exhaust temperature of the pump.

4. Cool down the motor rotor and stator.

BRIEF DESCRIPTION OF THE DRAWINGS:

1 is a schematic view showing the external structure of the overall structure of the present invention;

2 is a schematic view showing the overall front structure of the present invention;

Figure 3 is a schematic cross-sectional view showing the overall structure of the present invention;

Figure 4 is a schematic structural view of a portion I of the present invention;

Figure 5 is a schematic structural view of a portion K of the present invention;

Figure 6 is a perspective view showing the structure of the oil pusher of the present invention;

Figure 7 is a schematic view showing the front structure of the pusher wheel of the present invention;

Figure 8 is a side cross-sectional structural view of the pusher wheel of the present invention;

Figure 9 is a schematic structural view of a screw mandrel of the present invention;

detailed description

The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings.

The following examples are merely illustrative of the invention and are not intended to limit the embodiments of the invention. Other variations or modifications may be made to those skilled in the art based on the following description, which are obvious variations of the spirit of the present invention. Or variations are still within the scope of the invention.

A vertical vacuum pump self-circulating lubrication cooling system includes a pump body 100, a rotor shaft 3, a bearing 5, a screw base 20, a fuel tank 102, and a self-circulating oil passage, and the rotor shaft 3 is vertically disposed in the pump body 100. The two ends of the rotor shaft 3 are supported and rotated by a bearing 5, wherein the self-circulating oil passage is provided with an axial deep hole 2 in the rotor shaft 3, and the upper end of the deep hole is a blind hole, The deep hole is provided with an opening at a lower end surface of the rotor shaft 3; the deep hole is sleeved with a long tubular mandrel 13, and the top end and the bottom end of the mandrel 13 are coaxially disposed to be convexly convex to the mandrel a cylindrical positioning upper seat 131 and a lower positioning seat 1311, wherein the top of the positioning upper seat 131 and the cylindrical wall abut against the top and inner walls of the deep hole, between the outer wall of the mandrel 13 and the inner wall of the deep hole An annular gap is formed to form a vertical oil chamber 14. The outer wall of the positioning upper seat 131 is uniformly provided with an axial groove along the circumference, and a gap 132 communicating with the inner tube 13 is disposed in the groove. The bottom end of the vertical oil chamber 14 is closed by a positioning lower seat 1311, and the lower port of the mandrel 13 is an oil inlet port 31, which is horizontal The oil passages are respectively disposed above and below the lower end bearing, respectively forming an upper first transverse oil passage 6 and a lower second transverse oil passage 7 and communicating with the internal vertical oil chamber 14 , the self-circulating oil Routing the oil inlet 31 of the mandrel 13 to the oil passage of the mandrel 13 upwardly through the gap 132 of the top, and passing through the vertical oil chamber 14 and the first lateral direction from the upper end The oil passage flows into the bearing to be lubricated and then flows downward, and merges with the return oil flowing out from the second lateral oil passage at the lower end to flow back to the oil tank 102;

The tank 102 is overwrapped with a water cooling system 103.

The screw base 20 of the disc type is located below the rotor shaft 3, the screw base 20 is provided with a shaft hole corresponding to the rotor shaft 3, and the upper part of the screw base 20 is sleeved outside the rotor shaft 3, and the lower sleeve is sleeved The upper end of the screw base 20 is connected to the bottom end of the pump body 100 to seal the bottom of the inner cavity of the pump body 100; the lower end of the screw base 20 is connected to the oil tank 102. The upper end of the oil tank 102 is sealed; the rotor shaft 3 is disposed between the shaft hole of the screw base 20 a sealing member; a lower end of the rotor shaft 3 passes through the screw base 20 into the oil tank 102, and a closed oil sump 9 is fixed on the rotor shaft 3 under the lower end bearing, and the oil sump 9 a pusher 10 is disposed at the bottom, and the pusher 10 is immersed in the lubricating oil of the oil tank 102;

The upper end surface of the cylindrical interface 16 of the oil sump 9 is abutted against the lower bottom surface of the inner ring of the lower end bearing. The rotor shaft 3 inside the oil sump 9 is sleeved with a lock nut 17, and the lock nut 17 is sleeved. The upper end surface abuts against the lower end surface of the top surface of the oil sump 9 and clamps and fixes the oil sump 9.

A filter screen 12 is fixed to the bottom surface of the pusher wheel 10.

The oil sump 9 is a top closed barrel-shaped hollow shell, and an upper cylindrical end surface of the top surface of the oil sump 9 is provided with an integral cylindrical interface 16 and communicates with the interior thereof, and the cylindrical interface 16 is jacketed in the The lower end of the rotor shaft 3 is fixed. The bottom surface of the oil sump 9 is provided with a circular through hole 91. The lower end surface of the circular through hole 91 is provided with an annular groove 92. The pusher 10 is butterfly-shaped and lies in In the annular groove 92, the pusher 10 is fixed to the bottom of the oil sump 9 through a collar provided below; the center of the pusher 10 is a center column 110, and the center column 110 is coaxially covered with an annular ring. 111. The circumferential ring between the center column 110 and the annular ring 111 is provided with a blade-shaped integrated structure of the same direction of the blade 112.

The first lateral oil passage 6 and the second lateral oil passage 7 are plural and disposed along the circumference of the rotor shaft 3 .

The vacuum pump is a screw pump or a claw pump.

A rotor 4 is fixedly sleeved on the rotor shaft below the upper end bearing, and a motor stator 41 is disposed outside the rotor of the motor, and the deep hole extends upward to the top of the rotor shaft 3 provided with the motor rotor 4.

Basic principles and working processes:

First, after the motor rotor and the stator are energized, the rotor is synchronously reversely rotated, and the volume of gas entering the air inlet 1 is changed by the volume change generated by the internal rotor to form an air force, and the gas is exhausted from the exhaust port. The process of vacuuming is completed; in the process, the oil sump 9 forms a force for sucking oil into the barrel through the pusher 10 fixed at the bottom, and the oil in the oil tank is drawn into the oil sump 9, and continues to be pushed by the oil tanker 10. The thrust effect. Entering from the oil inlet into the self-circulating oil passage, passing upward through the gap 132 by simple gravity, and then flowing through the vertical oil chamber 14 and flowing back from the transverse hole 15 to the oil tank 102 Self-circulating oil passage; flowing through the bearing 5 provided with the rotor of the motor, the top of the rotor shaft of the stator, and the lower end to cool the motor and the bearing and lubricate the lower end bearing. The hot oil in the tank is cooled by an external water cooling system. Due to the high-speed rotation of the rotor, the lubricating oil in the fuel tank can be quickly circulated, which is extremely efficient.

The first lateral oil passage 6 and the second lateral oil passage 7 respectively cool and cool the bearings. The filter screen 12 on the pusher wheel filters out impurities in the lubricating oil during the cycle to prolong its life.

The oil pan can be designed with reference to the impeller of the axial fan and the impeller of the pump, and can be used in a variety of ways. The invention draws on the blade airfoil theory of the axial flow or centrifugal fan, and the impeller used does not need to generate a high negative pressure. As long as the angle is and the spindle rotates, the oil can be pumped up. The impeller of the embodiment utilizes the principle of fluid mechanics. The design came out.

The positioning seat 131 at both ends of the screw mandrel can ensure the coaxiality in the deep hole and play a supporting role.

Claims

A vertical vacuum pump self-circulating lubrication cooling system, comprising a pump body (100), a rotor shaft (3), a bearing (5), a screw base (20), a fuel tank (102), a self-circulating oil circuit, and the rotor shaft ( 3) vertically disposed in the pump body (100), the two ends of the rotor shaft (3) are supported and rotated by a bearing (5), characterized in that: the self-circulating oil passage is at the rotor shaft (3) an axially deep hole (2) is disposed therein, the upper end of the deep hole is a blind hole, and the deep hole is provided with an opening at a lower end surface of the rotor shaft (3); a tubular mandrel (13), the top end and the bottom end of the mandrel (13) are coaxially disposed with a cylindrical positioning upper seat (131) protruding from the mandrel (13), and a positioning lower seat (1311) The top of the positioning upper seat (131) and the wall of the cylinder abut against the top and inner walls of the deep hole, and an annular gap is formed between the outer wall of the mandrel (13) and the inner wall of the deep hole to form vertical oil. a cavity (14), the outer wall of the positioning upper seat (131) is uniformly provided with an axial groove along the circumference, and a notch (132) communicating with the inner tube (13) is disposed in the groove, The bottom end of the vertical oil chamber (14) is positioned The lower seat (1311) is closed, the lower port of the mandrel (13) is an oil inlet port (31), and the lateral oil passages are respectively disposed above and below the lower end bearing to form an upper first oil passage (6). And a second lateral oil passage (7) below and communicating with the internal vertical oil chamber (14), the self-circulating oil routing the oil inlet (31) of the mandrel (13) to the The inner shaft of the mandrel (13) is turned up through the gap (132) of the top, passes through the vertical oil chamber (14) and flows from the upper end of the first lateral oil passage into the bearing for lubrication. The lower outflow merges with the return oil flowing out of the second lateral oil passage at the lower end and flows back to the oil tank (102);

The fuel tank (102) is outsourced with a water cooling system (103).
A vertical vacuum pump self-circulating lubrication cooling system according to claim 1, wherein said screw base (20) of the disk type is located below said rotor shaft (3), said screw base (20) A shaft hole is disposed corresponding to the rotor shaft (3), an upper portion of the screw base (20) is sleeved outside the rotor shaft (3), a lower portion is sleeved outside the bearing (5) and fixed; the screw On the base (20) The end is connected to the bottom end of the pump body (100) to seal the bottom of the inner cavity of the pump body (100); the lower end of the screw base (20) is connected to the edge of the oil tank (102), and the fuel tank is (102) an upper port seal; a sealing member is disposed between the rotor shaft (3) and the shaft hole of the screw base (20); a lower end of the rotor shaft (3) passes through the screw base (20) to enter In the oil tank (102), a closed oil sump (9) is fixed on the rotor shaft (3) under the lower end bearing, and a pusher wheel (10) is arranged at the bottom of the oil sump (9). The oil tanker (10) is immersed in the lubricating oil liquid of the oil tank (102);

An upper end surface of the cylindrical interface (16) of the oil sump (9) is abutted against a lower bottom surface of the inner ring of the lower end bearing, and a lock nut is sleeved on the rotor shaft (3) inside the oil sump (9) (17) The upper end surface of the lock nut (17) abuts against the lower end surface of the top surface of the oil sump (9) and clamps and fixes the oil sump (9).
A vertical vacuum pump self-circulating lubrication cooling system according to claim 2, characterized in that a filter net (12) is fixed on the bottom surface of the pusher wheel (10).
A vertical vacuum pump self-circulating lubrication cooling system according to claim 2, characterized in that: the oil sump (9) is a top closed barrel-shaped empty shell, and the top surface of the oil sump (9) An integral cylindrical interface (16) is disposed on the upper end surface and communicates with the interior thereof. The cylindrical interface (16) is fixed at the lower end of the rotor shaft (3), and the bottom surface of the oil sump (9) is disposed. There is a circular through hole (91), and an annular groove (92) is disposed on a lower end surface of the circular through hole (91), and the pusher (10) is butterfly-shaped and lies in the annular groove (92). The pusher (10) is fixed to the bottom of the oil sump (9) through a collar provided below; the center of the pusher (10) is a center pillar (110), and the center pillar (110) is coaxial The outer casing has an annular ring (111), and the circumferential ring between the central column (110) and the annular ring (111) is provided with the same rotating blade (112) to form a butterfly-shaped integrated structure.
A vertical vacuum pump self-circulating lubrication cooling system according to claim 1, wherein: The first lateral oil passage (6) and the second lateral oil passage (7) are plural and disposed along the circumference of the rotor shaft (3).
A vertical vacuum pump self-circulating lubrication cooling system according to claim 1, wherein the vacuum pump is a screw pump or a claw pump.
The vertical vacuum pump self-circulating lubrication cooling system according to claim 1, wherein the deep hole is cylindrical, the mandrel is a circular hollow tube, and the positioning upper seat and the positioning lower seat are round. Tubular.
A vertical vacuum pump self-circulating lubrication cooling system according to claim 1, wherein a rotor of the motor (4) is fixedly sleeved on the rotor shaft below the upper end bearing, and a motor stator is arranged outside the rotor of the motor. (41) The deep elongated hole extends upward to the top of the rotor shaft (3) provided with the motor rotor (4).