CN210738809U

CN210738809U - Dry screw vacuum pump capable of injecting lubricating oil

Info

Publication number: CN210738809U
Application number: CN201921520726.2U
Authority: CN
Inventors: 许明然; 李松涛; 刘如学; 安国成
Original assignee: Shouguang Luyuan Salt Chemical Co ltd
Current assignee: Shouguang Luyuan Salt Chemical Co ltd
Priority date: 2019-09-12
Filing date: 2019-09-12
Publication date: 2020-06-12
Anticipated expiration: 2029-09-12

Abstract

The utility model discloses a dry-type screw vacuum pump of injectable lubricating oil relates to vacuum pump technical field, be equipped with the oil filler on the casing, be connected with sealing plug or oiling device on the oil filler, the oiling device includes an oiling section of thick bamboo and batch oil tank, and sealed slidable mounting has the piston in the oiling section of thick bamboo, and the one end sliding connection of an oiling section of thick bamboo has the piston rod, and straight line actuating mechanism is connected to the piston rod, and the other end of an oiling section of thick bamboo is equipped with first oilhole and second oilhole, and first oilhole is through annotating oil union coupling oil filler, and the second oilhole is through mending oil union coupling in batch oil tank, annotates oil pipe and men. The utility model provides a technical problem that dry-type screw vacuum pump life is low among the prior art, the utility model discloses a filling lubricating oil lasts dry-type vacuum pump's after the trouble life for condemned dry-type screw vacuum pump can also continue to use more than 6 months.

Description

Dry screw vacuum pump capable of injecting lubricating oil

Technical Field

The utility model relates to a vacuum pump technical field, in particular to can pour into dry-type screw vacuum pump of lubricating oil into.

Background

A dry screw vacuum pump is an air extractor which utilizes a pair of screws to do synchronous high-speed reverse rotation in a pump shell to generate air suction and exhaust functions, the two screws are finely balanced and corrected, supported by a bearing and installed in the pump shell, and a certain gap is reserved between the screws, so that when the pump works, no friction exists between the screws, the operation is stable, the noise is low, and lubricating oil is not needed in a working cavity.

Disclosure of Invention

To above defect, the utility model aims at providing a dry-type screw vacuum pump that can inject lubricating oil aims at solving among the prior art technical problem that dry-type screw vacuum pump life is low.

In order to solve the technical problem, the technical scheme of the utility model is that:

the utility model provides a can inject dry-type screw vacuum pump of lubricating oil, including the casing that is equipped with air inlet and gas vent, install two screw rods of engaged with in the casing, two screw rods rotate by the drive of first power component, be equipped with the oil filler hole on the casing, be connected with sealing plug or oiling device on the oil filler hole, the oiling device includes oiling section of thick bamboo and batch oil tank, sealed slidable mounting has the piston in the oiling section of thick bamboo, the one end sliding connection of oiling section of thick bamboo has the piston rod, straight line actuating mechanism is connected to the piston rod, the other end of oiling section of thick bamboo is equipped with first oilhole and second oilhole, first oilhole passes through the oiling pipe and connects the oil filler hole, the second oilhole is through mending oil union.

Wherein, annotate a section of thick bamboo and be equipped with two, the first oilhole on two notes oil drums passes through the tee bend valve and connects in the notes oil pipe, and the second oilhole of two notes oil drums is connected respectively in the batch oil tank.

Wherein, oiling device still includes the fixing base, and oiling section of thick bamboo, batch oil tank and sharp actuating mechanism all install in the fixing base.

The linear driving mechanism comprises a rotating shaft which is coaxially arranged with the piston rod, the rotating shaft is driven to rotate by a second power assembly, the rotating shaft is rotatably arranged on the mounting block, a screw section is arranged on the rotating shaft, and the screw section is sleeved in the piston rod and is in threaded connection with the piston rod.

Wherein, be equipped with the worm section on the pivot, second power component includes the worm wheel of linking with the worm section, and the worm wheel is rotated by motor drive.

Wherein, the motor is a stepping motor.

Wherein, two coaxial just setting of annotating oil cylinder, the worm section is located the middle part of pivot, and the both ends of pivot all are equipped with the screw rod section, and the direction of turning soon of two screw rod sections is opposite, two screw rod sections respectively with two piston rod threaded connection.

The oil filling device further comprises a controller, the valves mounted on the oil filling pipe and the oil supplementing pipe are electromagnetic valves, and the electromagnetic valves and the linear driving mechanisms are electrically connected to the controller.

The inner wall of the shell is provided with a plurality of inner ports which are arranged along the axial direction of the screw rod, and the inner ports are communicated with the oil filling port through the oil filling channel.

Wherein, each helicoid of two screws all corresponds at least one internal orifice.

After the technical scheme is adopted, the beneficial effects of the utility model are that:

because the utility model relates to a dry-type screw vacuum pump of injectable lubricating oil, including the casing that is equipped with air inlet and gas vent, install two screw rods of engaged with in the casing, two screw rods rotate by the drive of first power component, be equipped with the oil filler on the casing, be connected with sealing plug or oiling device on the oil filler, the oiling device includes oiling section of thick bamboo and batch oil tank, the sliding mounting who annotates a section of thick bamboo inner seal has the piston, the one end sliding connection of oiling section of thick bamboo has the piston rod, straight line actuating mechanism is connected to the piston rod, the other end of oiling section of thick bamboo is equipped with first oilhole and second oilhole, first oilhole is through annotating oil union coupling oil filler, the second oilhole is through mending the oil union coupling in batch oil. The linear driving mechanism drives the piston to act, when oil is pumped, the valve on the oil filling pipe is closed, the valve on the oil supplementing pipe is opened, and the linear driving mechanism drives the piston to slide towards the direction far away from the first oil hole or the second oil hole, so that negative pressure is generated in the oil filling cylinder, and oil in the oil storage tank is pumped into the oil filling cylinder; during oil injection, a valve on the oil injection pipe is opened, a valve on the oil supplementing pipe is closed, the linear driving mechanism drives the piston to slide towards the direction of the first oil hole or the second oil hole, oil in the oil injection cylinder is slowly extruded into the oil filling port through the oil injection pipe, and oil injection work is achieved.

Because the oiling section of thick bamboo is equipped with two, the first oilhole on two oiling section of thick bamboos passes through the tee bend valve and connects in the notes oil pipe, and the second oilhole of two oiling sections of thick bamboos is connected respectively in the batch oil tank. When one oil filling barrel performs oil filling action, the other oil filling barrel performs oil pumping action, and the oil filling action and the oil pumping action which are respectively performed by the two oil filling barrels are performed synchronously, namely continuous and non-pause oil filling is realized.

Because the motor in the linear driving mechanism is a stepping motor, the moving speed of the piston can be accurately controlled by using the stepping motor, and the continuity and stability of oil injection are ensured.

Because the oiling device also comprises a controller, the valves arranged on the oiling pipe and the oil supplementing pipe are electromagnetic valves, and the electromagnetic valves and the linear driving mechanism are electrically connected with the controller. The opening and closing of the electromagnetic valve, the forward and reverse rotation direction, the rotation speed and the rotation stroke of the stepping motor are controlled by the controller.

Because the inner wall of the shell is provided with a plurality of inner ports which are arranged along the axial direction of the screw rod, the inner ports are communicated with the oil filling port through the oil filling channel. Lubricating oil through the oil filler entering enters into the oiling passageway, then disperses each inner opening department, drips into towards the screw rod through each inner opening for all can receive the lubrication on each shaft bracket of screw rod, promoted lubricated wholeness and homogeneity, each helicoid of two screw rods all corresponds at least one inner opening, is used for guaranteeing lubricated quality, makes two screw rods can receive the lubrication in the very first time.

To sum up, the utility model provides an among the prior art technical problem that dry-type screw vacuum pump life is low, the utility model discloses an it continues the life of dry-type vacuum pump after the trouble to annotate lubricating oil for scrapped dry-type screw vacuum pump can also continue to use more than 6 months, the utility model discloses the oiling device of using uses, dismantles the convenience, and the oiling is stable.

Drawings

FIG. 1 is a schematic structural view of a dry screw vacuum pump according to the present invention;

fig. 2 is a schematic structural diagram of the oil injection device of the present invention.

In the figure, a base 1, a shell 2, an oil filling port 20, an oil filling channel 21, an inner port 22, a screw rod 3, a first power assembly 4, an oil filling device 5, a fixed seat 50, a mounting block 500, an oil filling cylinder 51, a first oil hole 510, a second oil hole 511, an oil filling pipe 512, an oil filling pipe 513, a piston 514, a piston rod 515, an oil storage tank 52, a linear driving mechanism 53, a worm section 530, a screw section 531, a worm wheel 532 and a motor 533.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The position that relates to in this specification all uses the utility model discloses a dry screw vacuum pump that can inject lubricating oil during normal operating is the standard, does not restrict the position when its storage and transportation, only represents relative position relation, does not represent absolute position relation.

As shown in fig. 1, the dry screw vacuum pump capable of injecting lubricating oil comprises a dry vacuum pump and an oil injection device 5, the dry vacuum pump comprises a base 1, a housing 2, a pair of meshed screws 3 and a first power assembly 4, the housing 2 is provided with an air inlet and an air outlet, the two screws 3 are driven by the first power assembly 4 to rotate, and the pair of screws 3 synchronously rotate in opposite directions at high speed in the housing 2 to generate air suction and exhaust functions.

As shown in fig. 1, the casing 2 is provided with an oil filling port 20, the oil filling port 20 is used for communicating with the inner cavity of the casing 2 and is used for injecting lubricating oil into the inner cavity of the casing 2, when the screw 3 of the dry vacuum pump has good performance, the oil filling port 20 always covers a sealing plug, the sealing plug is a hard plastic plug with threads, so that the sealing plug can be screwed on the oil filling port 20, and a sealing ring is arranged between the sealing plug and the oil filling port 20; when the two screws 3 of the dry vacuum pump interfere with each other, the sealing plug is removed, and lubricating oil is injected into the shell 2 through the oil injection device 5 by connecting the oil injection device 5, so that the service life of the dry vacuum pump is prolonged.

As shown in fig. 1, a plurality of inner ports 22 are formed in the inner wall of the housing 2, the inner ports 22 are communicated with the oil filling port 20 through the oil filling channel 21, the inner ports 22 are arranged along the axial direction of the screws 3, the lubricating oil entering through the oil filling port 20 enters the oil filling channel 21 and then disperses to the inner ports 22, and the lubricating oil drips toward the screws 3 through the inner ports 22, so that each shaft section of the screws 3 can be lubricated, the overall and uniform lubrication performance is improved, preferably, each of the coils of the two screws 3 corresponds to at least one inner port 22, so as to ensure the lubrication quality, and the two screws 3 can be lubricated in the first time.

As shown in fig. 2, the oil injection device 5 includes a fixing base 50, an oil injection cylinder 51, an oil storage tank 52 and a linear driving mechanism 53, and the oil injection cylinder 51, the oil storage tank 52 and the linear driving mechanism 53 are all mounted on the fixing base 50. The oil storage tank 52 stores lubricating oil, the oil storage tank 52 has no pressure difference with the outside, the piston 514 is installed in the oil filling cylinder 51 in a sealed and sliding mode, the oil filling cylinder 51 is a cylinder, correspondingly, the piston 514 is of a cylindrical structure, the outer wall of the piston 514 is provided with an annular groove, a sealing rubber ring is clamped in the annular groove and used for enhancing the sealing performance between the outer wall of the piston 514 and the inner wall of the oil filling cylinder 51.

As shown in fig. 2, a sliding sleeve is installed at one end of the oil filling cylinder 51, a piston rod 515 is sleeved on the sliding sleeve, a plurality of through holes are formed in the end portion of the oil filling cylinder 51 around the sliding sleeve, one end of the piston rod 515 located in the oil filling cylinder 51 is installed on the piston 514, the other end of the piston rod 515 is connected to a linear driving mechanism 53, the piston rod 515 is driven to move by the linear driving mechanism 53, and the linear driving mechanism 53 is an air cylinder or an electric push rod or a hydraulic cylinder; the other end of the oil filling cylinder 51 is provided with a first oil hole 510 and a second oil hole 511, the first oil hole 510 and the second oil hole 511 are arranged on two opposite sides of the cylinder body of the oil filling cylinder 51 and are close to the end part of the cylinder body of the oil filling cylinder 51, the first oil hole 510 is connected with the oil filling port 20 through an oil filling pipe 512, the second oil hole 511 is connected with the oil storage tank 52 through an oil supplementing pipe 513, and the oil filling pipe 512 and the oil supplementing pipe 513 are both provided with valves which are arranged at positions close to the first oil hole 510 or the second oil hole 511. The on-off of the oil filling pipe 512 and the oil supplementing pipe 513 is controlled by a valve. In the method, only one oil filling cylinder 51 is adopted, the piston 514 is driven to act through the linear driving mechanism 53, when oil is pumped, the valve on the oil filling pipe 512 is closed, the valve on the oil supplementing pipe 513 is opened, and the linear driving mechanism 53 drives the piston 514 to slide towards the direction far away from the first oil hole 510 or the second oil hole 511, so that negative pressure is generated in the oil filling cylinder 51, and oil in the oil storage tank 52 is pumped into the oil filling cylinder 51; during oil injection, the valve on the oil injection pipe 512 is opened, the valve on the oil supplement pipe 513 is closed, the linear driving mechanism 53 drives the piston 514 to slide towards the direction of the first oil hole 510 or the second oil hole 511, and oil in the oil injection cylinder 51 is extruded into the oil filling port 20 through the oil injection pipe 512, so that the oil injection work is realized.

As shown in fig. 2, in another embodiment of the present invention, two oil cylinders 51 are provided, the two oil cylinders 51 are respectively driven by a linear driving mechanism 53, the first oil holes 510 of the two oil cylinders 51 are connected to an oil filling pipe 512 through a three-way valve, the second oil holes 511 of the two oil cylinders 51 are respectively connected to an oil storage tank 52, when one oil cylinder 51 performs an oil filling operation, the other oil cylinder 51 performs an oil pumping operation, and the oil filling operation performed by the two oil cylinders 51 is synchronized with the oil pumping operation, that is, continuous and non-pause oil filling is implemented. The linear driving mechanism 53 includes a rotating shaft coaxially disposed with the piston rod 515, the fixing base 50 is provided with an installation block 500, the piston 514 is connected with a flange, one end of the piston rod 515 is sleeved in a column sleeve of the flange in a clearance manner, and is limited in the axial direction of the piston rod 515 by a limiting block, so that the piston rod 515 can rotate around the axis and cannot move along the axial direction, the rotating shaft is driven to rotate by the second power assembly, the rotating shaft is rotatably installed on the installation block 500, the rotating shaft is provided with a screw section 531, the screw section 531 is sleeved in the piston rod 515 and is in threaded connection with the piston rod 515, the rotating shaft is provided with a worm section 530, the second power assembly includes a worm wheel 532 connected with the worm section 530, the worm wheel 532 is driven to rotate by a motor 533, the motor 533 is preferably a stepping motor, and.

As shown in fig. 2, another way of this embodiment is to arrange two oil filling cylinders 51 coaxially and oppositely, locate the linear driving mechanism 53 between the two oil filling cylinders 51, locate the worm section 530 in the middle of the rotating shaft, and both ends of the rotating shaft are provided with screw sections 531, the rotation directions of the two screw sections 531 are opposite, and the two screw sections 531 are respectively in threaded connection with the two piston rods 515, so that when the worm rotates, the feeding directions of the two piston rods 515 along the axial direction are the same. The rotating shaft is driven to rotate by the motor 533, the rotating shaft drives the two piston rods 515 to move in the same direction, namely when one oil filling cylinder 51 is filled with oil, the other piston rod 515 pumps oil, so that the linear driving mechanism 53 drives the two oil filling cylinders 51 to synchronously act, and lubricating oil is continuously filled into the dry vacuum pump.

The oil injection device 5 can be manually operated or automatically controlled, the valves installed on the oil injection pipe 512 and the oil supply pipe 513 are electromagnetic valves, and the electromagnetic valves and the linear driving mechanism 53 are electrically connected to the controller, and the opening and closing of the electromagnetic valves, and the forward and reverse rotation directions, the rotation speed and the rotation stroke of the stepping motor 533 are controlled by the controller.

The present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes without creative labor from the above conception, and all the changes fall within the protection scope of the present invention.

Claims

1. The utility model provides a dry-type screw vacuum pump that can inject lubricating oil, is including the casing that is equipped with air inlet and gas vent, installs two screw rods of engaged with in the casing, two screw rods rotate by the drive of a power component, a serial communication port, be equipped with the oil filler on the casing, be connected with sealing plug or oiling device on the oil filler, the oiling device includes oiling section of thick bamboo and batch oil tank, the sliding mounting who annotates a section of thick bamboo inner seal has the piston, the one end sliding connection of oiling section of thick bamboo has the piston rod, sharp actuating mechanism is connected to the piston rod, the other end of oiling section of thick bamboo is equipped with first oilhole and second oilhole, first oilhole passes through notes oil union coupling the oil filler, the second oilhole through mend oil union coupling in the batch oil tank, annotate oil pipe with all be equipped.

2. The dry screw vacuum pump according to claim 1, wherein there are two oil filling cylinders, the first oil holes of the two oil filling cylinders are connected to the oil filling pipe through a three-way valve, and the second oil holes of the two oil filling cylinders are connected to the oil storage tank, respectively.

3. The dry screw vacuum pump according to claim 1, wherein the oil injection device further comprises a fixing base, and the oil cylinder, the oil reservoir, and the linear driving mechanism are mounted on the fixing base.

4. The dry screw vacuum pump according to claim 3, wherein the fixing base is provided with a mounting block, the piston rod is rotatably connected to the piston, the linear driving mechanism comprises a rotating shaft coaxially disposed with the piston rod, the rotating shaft is driven by a second power assembly to rotate, the rotating shaft is rotatably mounted on the mounting block, the rotating shaft is provided with a screw section, and the screw section is sleeved in the piston rod and is in threaded connection with the piston rod.

5. A dry screw vacuum pump with lubricant injection as claimed in claim 4, wherein the shaft is provided with a worm section, and the second power assembly comprises a worm wheel coupled to the worm section, the worm wheel being driven to rotate by a motor.

6. A dry screw vacuum pump with lubricant injection as claimed in claim 5, characterized in that the motor is a stepper motor.

7. The dry screw vacuum pump according to claim 6, wherein the two oil cylinders are coaxially arranged opposite to each other, the worm section is located in the middle of the rotating shaft, the two ends of the rotating shaft are provided with screw sections, the screw sections have opposite rotation directions, and the two screw sections are respectively in threaded connection with the two piston rods.

8. The dry screw vacuum pump according to any one of claims 1 to 7, wherein the oil injection device further comprises a controller, the valves mounted on the oil injection pipe and the oil supply pipe are electromagnetic valves, and the electromagnetic valves and the linear driving mechanism are electrically connected to the controller.

9. A dry screw vacuum pump for injecting lubricating oil according to claim 1, wherein a plurality of internal ports are provided in an inner wall of the casing, the plurality of internal ports being arranged along an axial direction of the screw, the plurality of internal ports being communicated with the oil filler port through an oil filler passage.

10. A dry screw vacuum pump with lubricant injection as claimed in claim 9, wherein each of the two screws has at least one of said internal ports.