Adjustable engine oil spraying device for vacuum pump
阅读说明：本技术 一种真空泵用可调节的机油喷雾装置 (Adjustable engine oil spraying device for vacuum pump ) 是由 张学苏 张文宇 胡子东 于 2020-07-02 设计创作，主要内容包括：本发明公开了一种真空泵用可调节的机油喷雾装置,包括呈半球壳的连接罩,所述的连接罩的一侧设置有贯穿连接罩的出气喷头,所述连接罩的底部设置有贯穿连接罩的出油接头,所述的出气喷头经一根管道连接有进气阀,所述的出油接头底部连接有进油阀,且所述的出气喷头与出油接头互为垂直设置；并在所述的连接罩的端面处设置有支撑沿,在所述的支撑沿上设置有用于固定的接头抱箍,在接头抱箍与支撑沿之间设置有密封片,本发明的喷雾装置结构简单且能便于真空泵润滑且润滑效果良好。(The invention discloses an adjustable engine oil spraying device for a vacuum pump, which comprises a connecting cover in a hemispherical shell shape, wherein one side of the connecting cover is provided with an air outlet nozzle penetrating through the connecting cover, the bottom of the connecting cover is provided with an oil outlet joint penetrating through the connecting cover, the air outlet nozzle is connected with an air inlet valve through a pipeline, the bottom of the oil outlet joint is connected with an oil inlet valve, and the air outlet nozzle and the oil outlet joint are vertically arranged; the end face of the connecting cover is provided with a supporting edge, the supporting edge is provided with a connector hoop for fixing, and a sealing sheet is arranged between the connector hoop and the supporting edge.)
1. The utility model provides an adjustable machine oil atomizer for vacuum pump which characterized by: the oil-gas separation device comprises a connecting cover (1) in a hemispherical shell, wherein an air outlet nozzle (2) penetrating through the connecting cover (1) is arranged on one side of the connecting cover (1), an oil outlet joint (3) penetrating through the connecting cover (1) is arranged at the bottom of the connecting cover (1), the air outlet nozzle (2) is connected with an air inlet valve (4) through a pipeline, an oil inlet valve (5) is connected to the bottom of the oil outlet joint (3), and the air outlet nozzle (2) and the oil outlet joint (3) are vertically arranged; and a supporting edge is arranged on the end face of the connecting cover (1), a joint hoop (6) for fixing is arranged on the supporting edge, and a sealing sheet (7) is arranged between the joint hoop (6) and the supporting edge.
2. The adjustable engine oil spraying device for the vacuum pump as claimed in claim 1, wherein: the air inlet valve (4) and the oil inlet valve (5) are both electromagnetic valves, and an electromagnetic valve timer (9) is arranged for controlling the air inlet valve (4) and the oil inlet valve (5) to work simultaneously.
3. The adjustable engine oil spraying device for the vacuum pump as claimed in claim 1, wherein: the air inlet valve (4) and the oil inlet valve (5) are both electromagnetic valves, and a controller PLC for controlling the air inlet valve (4) and the oil inlet valve (5) to work is arranged.
4. The adjustable engine oil spraying apparatus for a vacuum pump as claimed in claim 2 or 3, wherein: the air outlet nozzle (2) comprises a nozzle body (2a), the inner wall of the nozzle body (2a) is provided with a stopping step, the two ends of the nozzle body are provided with external threads, the external thread at one end is connected with an air outlet (2b), the other end is connected with a rotary adjusting end cover (2g), and the nozzle body (2a) is provided with a pressure adjusting hole (2c) connected with an inner cavity; a spring (2d) is arranged in the inner cavity of the spray head body (2a) and is positioned on one side of the backstop step; a movable ring (2e) is arranged in the inner cavity of the spray head body (2a), the movable ring (2e) is positioned on the outer side of the spring (2d), two ends of the movable ring (2e) respectively abut against the inner walls of the spring (2d) and the rotatable adjusting end cover (2g), and a filter screen (2f) is arranged on the movable ring (2 e); the rotatable adjusting end cover (2g) is provided with internal threads and is connected to the external threads of the spray head body (2a), and the rotatable adjusting end cover (2g) is provided with an air inlet (2 h); and a telescopic connecting pipe (8) is arranged between the spray head body (2a) and the pipeline, and the telescopic connecting pipe (8) is fixedly connected with the rotary adjusting end cover (2 g).
5. The adjustable engine oil spraying device for the vacuum pump as claimed in claim 4, wherein: the shower nozzle of giving vent to anger (2) can rotate and adjust end cover (2g) through the rotation and promote activity ring (2e), the aperture of adjustment pressure regulating hole (2c), through losing heart decompression, realize the adjustment to carrier gas pressure, the shower nozzle of giving vent to anger (2) adjustment carrier gas pressure, the carrier gas after the adjustment is sent to in connecting cover (1).
6. The adjustable engine oil spraying device for the vacuum pump as claimed in claim 5, wherein: the rotatable adjusting end cover (2g) rotates inwards to push the movable ring (2e) to move towards the direction of the stopping step, and the movable ring (2e) increases the opening degree of the pressure regulating hole (2c) and reduces the pressure of carrier gas; the end cover (2g) can be rotationally adjusted outwards, the movable ring (2e) gradually resets under the pushing of the spring (2d), the opening degree of the pressure adjusting hole (2c) is reduced, and the pressure of carrier gas is increased.
7. The adjustable engine oil spraying device for the vacuum pump as claimed in claim 6, wherein: the device also comprises a spraying liquid outlet device, an air source supply device and an engine oil homogenizing sealed containing device which are arranged outside;
the air source providing device and the engine oil homogenizing and sealing containing device are respectively provided with a signal collecting device, and respectively collect an air pressure value of the air source providing device and an air pressure value and a liquid level value of the engine oil homogenizing and sealing containing device, and transmit the collected values to the controller PLC;
the spraying liquid outlet device is connected with the liquid homogenizing and sealing containing device, the gas source providing device is respectively connected with the gas inlet valve (4) and the liquid homogenizing and sealing containing device, the controller PLC is connected with the liquid homogenizing and sealing containing device and the gas source providing device, and the controller PLC controls all hardware to work cooperatively by operating the human-computer interaction unit;
the oil inlet valve (5) is connected with the spraying and liquid discharging device, the air source providing device is connected with the engine oil homogenizing and sealing containing device, the controller PLC is connected with the engine oil homogenizing and sealing containing device, and the controller PLC controls all hardware to work cooperatively through operating the human-computer interaction unit;
the engine oil homogenizing sealed containing device is a sealed stirring tank with a driving motor, and the driving motor is positioned at the lower part of the sealed stirring tank; the air source providing device is a device which consists of an air compressor and an air storage tank;
the method for realizing lubrication of the engine oil spraying device comprises the following steps:
s1, controlling and starting system equipment through a human-computer interaction unit, and inputting preset lubrication interval time and single lubrication duration to a controller PLC through the human-computer interaction unit; after 200s of preheating time is finished, after the equipment is normally started, the controller PLC tests the collected air pressure value of the air source providing device, when the air pressure value is stabilized at 0.3-0.4 MPa, the state unit is started, and the air pressure value of the air source, the liquid level value and the air pressure value in the sealed stirring tank are displayed through the human-computer interaction unit according to the real-time air pressure value of the air source collected by the controller PLC;
if the collected air pressure value of the air source is less than 0.3-0.4 MPa, starting an air compressor, and filling air into an air storage tank until the air pressure value of the air source is stabilized at 0.3-0.4 MPa;
if the collected air pressure value in the sealed stirring tank is less than 0.3-0.4 MPa, closing an exhaust pipeline and a liquid return gas circuit of the sealed stirring tank, starting an air compressor, and adding air into an air storage tank until the air pressure value in the sealed stirring tank is stabilized at 0.3-0.4 MPa;
s2, after the state unit is started, the controller PLC still needs to uninterruptedly acquire and test the air pressure value of the air source and the air pressure value in the sealed stirring tank, and when the air pressure value of the air source is smaller than 0.3-0.4 MPa, the air compressor is started; when the air pressure value in the sealed stirring tank is less than 0.3-0.4 MPa, closing an exhaust pipeline and a liquid return gas circuit of the sealed stirring tank, and starting an air compressor; when the atmospheric pressure value of air supply is stabilized at 0.3 ~ 0.4MPa, and the atmospheric pressure value in the sealed agitator tank is also stabilized at 0.3 ~ 0.4MPa, real-time liquid level in the sealed agitator tank is gathered to controller PLC:
a. when the liquid level is at the middle liquid level, optionally entering one of a supplementary engine oil unit, an operation unit or a maintenance unit;
b. when the detected liquid level is at a high liquid level, the oil supplementing unit is forcibly shielded, namely, the operation unit and the maintenance unit can only be started;
c. when the detected liquid level is at a low liquid level, the oil supplementing unit is forcibly started, namely, only oil can be supplemented, and the maintenance unit and the operation unit cannot be started;
s3, after the operation unit is started, the working unit is in a working state at the moment, and specifically, the controller PLC is used for controlling the spraying liquid outlet device, the oil inlet valve (5) and the air inlet valve (4) to perform spraying lubrication work on the vacuum pump; at the moment, the state unit is always in a starting state, namely, the air pressure and the liquid level are always continuously detected; in the spraying operation process, the system firstly opens the air inlet pipeline, then closes the oil supplementing pipeline, then closes the air exhaust pipeline, then closes the liquid return air circuit, and finally opens the liquid exhaust pipeline, namely normal spraying lubrication operation is carried out;
s4, after the spraying lubrication of the vacuum pump is finished (the time for single lubrication is reached), the PLC starts a lubrication suspension function; specifically, a timing module in the controller PLC starts timing (presetting interval time of lubrication), the suspension time of the engine oil spraying device is calculated, and the engine oil spraying device enters the working unit again after the preset time is reached;
and S5, controlling and closing the system equipment through the man-machine interaction unit.
8. The adjustable engine oil spraying device for the vacuum pump as claimed in claim 7, wherein: the state unit is used for displaying that the air source is normal, the air pressure value of the air source is stabilized at 0.3-0.4 MPa, the state unit displays that the air source is normal, the air pressure value of the sealed stirring tank is stabilized at 0.3-0.4 MPa, and the state unit displays that the tank body is ready; when the state unit displays 'air source is under-pressure', the system starts an air compressor to fill air into the air storage tank, and the operation is continued until the air pressure of the air source is stabilized at 0.3-0.4 MPa; when the state unit displays 'tank body under-pressure', the system can close the exhaust pipeline and the liquid return gas circuit of the sealed stirring tank firstly, then start the air compressor, add gas into the gas storage tank until the pressure value in the sealed stirring tank is stabilized at 0.3-0.4 MPa, and then continue to operate.
9. The adjustable engine oil spraying device for the vacuum pump as claimed in claim 8, wherein: the working flow of the oil replenishing unit is as follows: when the controller PLC acquires a low liquid level, the system always pops up an operation interface of replenishing engine oil; the engine oil supplementing work can be carried out, in the engine oil supplementing process, the system can close an air inlet pipeline of the sealed stirring tank, close a liquid discharge pipeline of the sealed stirring tank, open an exhaust pipeline of the sealed stirring tank and open an engine oil supplementing pipeline of the sealed stirring tank, and the equipment supplements the engine oil; when the controller PLC collects a high liquid level, the system can ash an operation interface of 'engine oil supplement' and lose the function of using the engine oil supplement.
10. The adjustable engine oil spraying device for the vacuum pump as claimed in claim 9, wherein: after the operation of spraying and lubricating is stopped by the vacuum pump, the operation of maintenance is selected when the air-tight detection of the device and the test of the health condition of electronic components and the like are needed; and clicking an operation interface for entering maintenance on the man-machine interaction unit, and closing the air inlet pipeline, the engine oil supplementing pipeline, the air exhaust pipeline, the liquid exhaust pipeline and the liquid return gas circuit by the system to perform maintenance operation.
Technical Field
The invention belongs to the technical field of vacuum pump lubrication, and particularly relates to an adjustable engine oil spraying device for a vacuum pump.
Background
The vacuum pump refers to a device or equipment for obtaining vacuum by pumping a pumped container by using a mechanical, physical, chemical or physicochemical method. In general, a vacuum pump is a device for improving, generating and maintaining a vacuum in a certain closed space by various methods.
When the vacuum pump operates again, the pump cavity and the impeller need to be lubricated, and if the pump cavity and the impeller are not lubricated for a long time, the damage of the pump can be accelerated; therefore, there is a need for a device for lubricating a vacuum pump, which has a good lubricating effect on the vacuum pump.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the adjustable engine oil spraying device for the vacuum pump, which is simple in structure, convenient for lubricating the vacuum pump and good in lubricating effect.
In order to achieve the purpose, the invention provides the following technical scheme: an adjustable engine oil spraying device for a vacuum pump comprises a connecting cover in a hemispherical shell shape, wherein an air outlet nozzle penetrating through the connecting cover is arranged on one side of the connecting cover, an oil outlet joint penetrating through the connecting cover is arranged at the bottom of the connecting cover, the air outlet nozzle is connected with an air inlet valve through a pipeline, an oil inlet valve is connected to the bottom of the oil outlet joint, and the air outlet nozzle and the oil outlet joint are vertically arranged; and the end face of the connecting cover is provided with a supporting edge, the supporting edge is provided with a joint hoop for fixing, and a sealing sheet is arranged between the joint hoop and the supporting edge. And a protective cover is arranged outside the device body, and an openable end cover is arranged on the protective cover.
The engine oil spraying device is arranged on an air inlet branch of the vacuum pump, the device is started when the vacuum pump runs, engine oil is conveyed into the connecting cover through the oil inlet valve, and high-pressure gas is sprayed out through the air inlet valve so that the engine oil is blown into the vacuum pump, so that the vacuum pump is lubricated; the support edge and the joint hoop are arranged to facilitate the pipeline connection of the connecting cover and the vacuum pump air inlet branch, and the sealing sheet is arranged between the joint hoop and the support edge, so that the sealing performance of the pipeline connection of the connecting cover and the vacuum pump air inlet branch can be ensured.
The invention is further configured to: the air inlet valve and the oil inlet valve are both electromagnetic valves, and an electromagnetic valve timer for controlling the air inlet valve and the oil inlet valve to work simultaneously is arranged.
The electromagnetic valve timer is arranged to control the air inlet valve and the oil inlet valve to work simultaneously, and the opening time and the opening interval of the electromagnetic valve can be controlled by the electromagnetic valve timer, so that adjustable interval type lubrication is realized, and manual operation is reduced.
The invention is further configured to: the air inlet valve and the oil inlet valve are both electromagnetic valves, and a controller PLC for controlling the air inlet valve and the oil inlet valve to work is arranged outside the air inlet valve and the oil inlet valve.
The air inlet valve and the oil inlet valve are arranged to be electromagnetic valves, and the PLC is used for controlling the air inlet valve and the oil inlet valve to work, so that automatic lubrication of the engine oil spraying equipment can be achieved, and control over other peripheral equipment can be facilitated.
The invention is further configured to: the air outlet nozzle comprises a nozzle body, the inner wall of the nozzle body is provided with a backstop step, the two ends of the nozzle body are provided with external threads, the external thread at one end is connected with an air outlet, the other end of the nozzle body is connected with a rotary adjusting end cover, and the nozzle body is provided with a pressure adjusting hole connected with an inner cavity; a spring is arranged in the inner cavity of the nozzle body and is positioned on one side of the backstop step; a movable ring is arranged in the inner cavity of the spray head body, the movable ring is positioned at the outer side of the spring, two ends of the movable ring respectively abut against the inner walls of the spring and the rotatable end cover, and a filter screen is arranged on the movable ring; the rotatable adjusting end cover is provided with internal threads and is connected to the external threads of the spray head body, and the rotatable adjusting end cover is provided with an air inlet; and a telescopic connecting pipe is arranged between the spray head body and the pipeline. The filter screen is fixed between the two movable rings and has a certain thickness which is larger than the diameter of the pressure regulating hole; the air entering the nozzle body can flow out of the pressure regulating air through the filter screen.
The invention is further configured to: the shower nozzle of giving vent to anger can rotate the adjustment end cover through the rotation and promote the activity ring, the aperture of adjustment pressure regulating hole, through losing heart decompression, realize the adjustment to carrier gas pressure, terminal shower nozzle adjustment carrier gas pressure, the carrier gas after the adjustment is sent to in the connecting cover.
The invention is further configured to: the rotatable adjusting end cover is rotated inwards to push the movable ring to move towards the direction of the backstop step, the movable ring increases the opening degree of the pressure regulating hole and reduces the pressure of carrier gas; the end cover can be rotationally adjusted outwards, the movable ring gradually resets under the pushing of the spring, the opening degree of the pressure adjusting hole is reduced, and the pressure of carrier gas is increased.
The situation that the engine oil cannot be completely fed into or discharged from the vacuum pump when the air pressure is too small can occur, and the engine oil can be blown to the connecting cover or the pipe wall of the air inlet branch of the vacuum pump when the air pressure is too large, so that the lubricating effect is reduced; only moderate other can completely blow the engine oil into the vacuum pump, and the size of the blown air pressure is adjusted through the air outlet nozzle with the structure, so that the use of air inlet pressure sources with different specifications or different air pressures is met.
The invention is further configured to: the device also comprises a spraying liquid outlet device, an air source supply device and an engine oil homogenizing sealed containing device which are arranged outside;
the air source providing device and the engine oil homogenizing and sealing containing device are respectively provided with a signal collecting device, and respectively collect an air pressure value of the air source providing device and an air pressure value and a liquid level value of the engine oil homogenizing and sealing containing device, and transmit the collected values to the controller PLC;
the spraying liquid outlet device is connected with the liquid homogenizing sealed containing device, and the gas source providing device is respectively connected with the gas inlet valve and the liquid homogenizing sealed containing device; the controller PLC is connected with the liquid homogenizing and sealing containing device and controls all hardware to work cooperatively by operating the human-computer interaction unit;
the oil inlet valve is connected with the spraying and liquid discharging device, the air source providing device is connected with the engine oil homogenizing and sealing containing device, the controller PLC is connected with the engine oil homogenizing and sealing containing device, and the controller PLC controls all hardware to work cooperatively through operating the human-computer interaction unit;
the engine oil homogenizing sealed containing device is a sealed stirring tank with a driving motor, and the driving motor is positioned at the lower part of the sealed stirring tank; the air source providing device is a device which consists of an air compressor and an air storage tank together, so that oil mist blown out of the oil inlet valve can be ensured, an air source can be provided for the air inlet valve, oil substances blown out of the oil inlet valve can facilitate the lubrication of the vacuum pump, and the air blown out of the air inlet valve can blow the oil mist into a pipeline of an air inlet branch of the vacuum pump;
the method for realizing lubrication of the engine oil spraying device comprises the following steps:
s1, controlling and starting system equipment through a human-computer interaction unit, and inputting preset lubrication interval time and single lubrication duration to a controller PLC through the human-computer interaction unit; after 200s of preheating time is finished, after the equipment is normally started, the controller PLC tests the collected air pressure value of the air source providing device, when the air pressure value is stabilized at 0.3-0.4 MPa, the state unit is started, and the air pressure value of the air source, the liquid level value and the air pressure value in the sealed stirring tank are displayed through the human-computer interaction unit according to the real-time air pressure value of the air source collected by the controller PLC;
if the collected air pressure value of the air source is less than 0.3-0.4 MPa, starting an air compressor, and filling air into an air storage tank until the air pressure value of the air source is stabilized at 0.3-0.4 MPa;
if the collected air pressure value in the sealed stirring tank is less than 0.3-0.4 MPa, closing an exhaust pipeline and a liquid return gas circuit of the sealed stirring tank, starting an air compressor, and adding air into an air storage tank until the air pressure value in the sealed stirring tank is stabilized at 0.3-0.4 MPa;
s2, after the state unit is started, the controller PLC still needs to uninterruptedly acquire and test the air pressure value of the air source and the air pressure value in the sealed stirring tank, and when the air pressure value of the air source is smaller than 0.3-0.4 MPa, the air compressor is started; when the air pressure value in the sealed stirring tank is less than 0.3-0.4 MPa, closing an exhaust pipeline and a liquid return gas circuit of the sealed stirring tank, and starting an air compressor; when the atmospheric pressure value of air supply is stabilized at 0.3 ~ 0.4MPa, and the atmospheric pressure value in the sealed agitator tank is also stabilized at 0.3 ~ 0.4MPa, real-time liquid level in the sealed agitator tank is gathered to controller PLC:
a. when the liquid level is at the middle liquid level, optionally entering one of a supplementary engine oil unit, an operation unit or a maintenance unit;
b. when the detected liquid level is at a high liquid level, the oil supplementing unit is forcibly shielded, namely, the operation unit and the maintenance unit can only be started;
c. when the detected liquid level is at a low liquid level, the oil supplementing unit is forcibly started, namely, only oil can be supplemented, and the maintenance unit and the operation unit cannot be started;
s3, after the operation unit is started, the working unit is in a working state at the moment, and specifically, the controller PLC is used for controlling the spray liquid outlet device, the oil inlet valve and the air inlet valve to perform spray lubrication work on the vacuum pump; at the moment, the state unit is always in a starting state, namely, the air pressure and the liquid level are always continuously detected; in the spraying operation process, the system firstly opens the air inlet pipeline, then closes the oil supplementing pipeline, then closes the air exhaust pipeline, then closes the liquid return air circuit, and finally opens the liquid exhaust pipeline, namely normal spraying lubrication operation is carried out;
s4, after the spraying lubrication of the vacuum pump is finished (the time for single lubrication is reached), the PLC starts a lubrication suspension function, and particularly: a timing module in the controller PLC starts timing (presetting interval time of lubrication), the suspension time of the oil spraying device is calculated, and the oil spraying device enters the working unit again after the preset time is reached;
and S5, controlling and closing the system equipment through the man-machine interaction unit.
The invention is further configured to: the state unit is used for displaying that the air source is normal, the air pressure value of the air source is stabilized at 0.3-0.4 MPa, the state unit displays that the air source is normal, the air pressure value of the sealed stirring tank is stabilized at 0.3-0.4 MPa, and the state unit displays that the tank body is ready; when the state unit displays 'air source is under-pressure', the system starts an air compressor to fill air into the air storage tank, and the operation is continued until the air pressure of the air source is stabilized at 0.3-0.4 MPa; when the state unit displays 'tank body under-pressure', the system can close the exhaust pipeline and the liquid return gas circuit of the sealed stirring tank firstly, then start the air compressor, add gas into the gas storage tank until the pressure value in the sealed stirring tank is stabilized at 0.3-0.4 MPa, and then continue to operate.
The invention is further configured to: the working flow of the oil replenishing unit is as follows: when the controller PLC acquires a low liquid level, the system always pops up an operation interface of replenishing engine oil; the engine oil supplementing work can be carried out, in the engine oil supplementing process, the system can close an air inlet pipeline of the sealed stirring tank, close a liquid discharge pipeline of the sealed stirring tank, open an exhaust pipeline of the sealed stirring tank and open an engine oil supplementing pipeline of the sealed stirring tank, and the equipment supplements the engine oil; when the controller PLC collects a high liquid level, the system can ash an operation interface of 'engine oil supplement' and lose the function of using the engine oil supplement.
The invention is further configured to: the working flow of the maintenance unit is as follows: after the operation of spray lubrication is finished by the vacuum pump, when the device needs to be subjected to hermetic seal detection and the testing of the health conditions of electronic components and the like, the operation of maintenance is selected; and clicking an operation interface for entering maintenance on the man-machine interaction unit, and closing the air inlet pipeline, the engine oil supplementing pipeline, the air exhaust pipeline, the liquid exhaust pipeline and the liquid return gas circuit by the system to perform maintenance operation.
Drawings
FIG. 1 is a schematic diagram of a first perspective structure according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a second view according to an embodiment of the present invention;
FIG. 3 is a partial structural diagram of a first embodiment of the present invention;
FIG. 4 is a schematic diagram of a second first perspective of the embodiment of the present invention;
FIG. 5 is a schematic diagram of a second perspective view of the present invention;
FIG. 6 is a schematic structural view of the air outlet showerhead of the present invention;
FIG. 7 is a system flowchart of a second embodiment of the present invention;
FIG. 8 is a system control structure diagram according to a second embodiment of the present invention;
FIG. 9 is a flow chart of the second embodiment of the present invention;
FIG. 10 is a maintenance flow chart of the second embodiment of the present invention;
FIG. 11 is a flow chart of the spraying operation of the second embodiment of the present invention;
reference numbers in the drawings and corresponding part names: the automatic oil-out device comprises a connecting
Detailed Description
Two embodiments of the present invention are further described with reference to fig. 1 to 11.
- 上一篇：一种医用注射器针头装配设备
- 下一篇：一种防漏液的气动润滑脂增压加注机及其加注方法