CN211924456U

CN211924456U - Self-driven double-screw pump bearing lubricating system

Info

Publication number: CN211924456U
Application number: CN202020107093.9U
Authority: CN
Inventors: 占方余; 郑臣; 鲁健鹏; 何永帅
Original assignee: Bst Pump Tianjin Co ltd
Current assignee: Bst Pump Tianjin Co ltd
Priority date: 2020-01-17
Filing date: 2020-01-17
Publication date: 2020-11-13
Anticipated expiration: 2030-01-17

Abstract

The utility model relates to a twin-screw pump technical field just discloses a self-driven formula twin-screw pump bearing lubricating system, including lubricating pump, shaft coupling, suction line, oil tank, heat exchanger, gear box oil return nest of tubes, lubricated case oil return nest of tubes, discharge nest of tubes, drive end bearing frame, lubricated case, by drive end bearing frame, gear box and twin-screw pump constitution. The rotating shaft (can be the driving shaft and also can be the driven shaft) through utilizing the double-screw pump is taken as the power source of the lubricating pump of the lubricating system, the driving lubricating pump drives the gear oil used for lubricating and cooling the synchronous gear and the bearing to circularly flow in the system, in the circulating process, the gear oil is cooled by the heat exchanger, then the cooled gear oil is injected into the synchronous gear and the bearing again, the synchronous gear and the bearing are sprayed and lubricated, thereby the heat generated by the synchronous gear and the bearing is taken away, and the operating temperature of the synchronous gear and the bearing is ensured not to exceed the allowable limit.

Description

Self-driven double-screw pump bearing lubricating system

Technical Field

The utility model relates to a twin-screw pump technical field specifically is a self-driven formula twin-screw pump bearing lubricating system.

Background

Rotors of the twin-screw pump generally adopt a double-support structure, bearings at a driving end are lubricated by lubricating grease or lubricating oil, bearings at a non-driving end are close to a synchronous gear, and the bearings are subjected to splash lubrication by gear oil in a gear box; the heat generated by the bearings at the driving end and the bearings at the non-driving end and the synchronous gears is naturally dissipated in the surrounding environment through the bearing seat, gear oil and the gear box wall in the forms of conduction, convection and radiation. Under a common working condition, the heat generated by the bearing and the synchronous gear and the heat dissipation capacity can keep a balanced state when the pump operates, so that the operating temperature of the bearing and the synchronous gear is not beyond the allowable limit. However, when the twin-screw pump is in a condition of large working pressure difference and long-time continuous operation is necessary, the thermal power generated by the synchronous gears and the bearings is often beyond the natural heat dissipation capacity of the gearbox and the bearing seat, so that the temperature of the synchronous gears and the bearings is sharply increased and even exceeds the allowable working temperature limit value of the synchronous gears and the bearings.

At this point, a lubrication system is necessary to remove the excess heat at the synchronizing gears and bearings. Conventional lubrication systems are often stand-alone cooling oil stations. The cooling oil station has a complex structure and large occupied space; needs an independent power and control system, and needs to be interlocked and controlled with the double-screw pump, and has large requirements on field installation and debugging and workload. Therefore, a self-driven forced lubrication system is developed, an additional power supply and a control system are not needed, and the installation space is not increased; and the secondary installation and debugging on site are not needed, the control is simple, and the maintenance is simple and convenient.

SUMMERY OF THE UTILITY MODEL

To the problem, the utility model aims to provide a self-driven double screw pump bearing lubricating system need not extra power and control system, need not extra installation space, also need not carry out secondary installation, debugging at the scene, and dependable performance, easy operation, maintenance are simple and convenient, have both reduced equipment investment, running cost, have reduced on-the-spot maintenance's intensity of labour again.

The utility model discloses a realize that technical purpose adopts following technical scheme: the utility model provides a self-driven double screw pump bearing lubricating system, includes lubricating pump, shaft coupling, suction line, oil tank, heat exchanger, gear box oil return nest of tubes, lubricated case oil return nest of tubes, discharge nest of tubes, drive end bearing frame, lubricated case, by drive end bearing frame, gear box and double screw pump constitution, lubricating pump fixed mounting is in the left side of gear box, gear box fixed mounting is in the left side by the drive end bearing frame, install the left side at the double screw pump by the drive end bearing frame, the right side at the double screw pump is installed to the drive end bearing frame, lubricated case is installed on the right side of drive end bearing frame, suction line installs the sunction inlet end at the lubricating pump, suction line's the other end and heat exchanger intercommunication, the other end and the oil tank intercommunication of heat exchanger, discharge nest of tubes installs the discharge port end at the lubricating pump, discharge tube group, The driven end bearing seat is communicated with the driven end bearing seat, the gear box is communicated with the oil tank through a gear box oil return pipe group, and the lubricating box is communicated with the oil tank through a lubricating box oil return pipe group.

Furthermore, the oil tank is arranged on the skid seat, and the oil tank is a T-shaped closed container.

Furthermore, the lubricating pump is connected with a rotating shaft of the double-screw pump through a coupler.

Furthermore, one end of the coupler is provided with a cylindrical shaft sleeve of a flange plate, a rectangular key groove is arranged in the cylindrical sleeve, the middle of the flange plate is provided with a sub-port matched with a rotating shaft of the double-screw pump, and the periphery of the flange plate is provided with uniformly distributed through holes.

Furthermore, the two ends of the gearbox oil return pipe group and the lubrication box oil return pipe group are short pipes with loop nuts.

The utility model discloses possess following beneficial effect:

1. this self-driven formula double screw pump bearing lubricating system, the axis of rotation through utilizing the double screw pump (can be the driving shaft also can be the driven shaft) is as this lubricating system lubricating pump's power supply, the drive lubricating pump area is used for the gear oil of lubricated cooling synchronizing gear and bearing to be the circulation flow in this system, at the endless in-process, carry out cooling to gear oil by the heat exchanger, then pour into synchronizing gear and bearing department into again the gear oil after the cooling, spray lubrication to synchronizing gear and bearing, thereby take away the heat that synchronizing gear and bearing produced, guarantee that the operating temperature of synchronizing gear and bearing does not surpass the limit of allowwing.

2. The self-driving double-screw pump bearing lubricating system is characterized in that gear oil is filled in an oil tank, when a double-screw pump works, a rotating shaft of the double-screw pump drives a lubricating pump to operate through a coupler, the gear oil is respectively conveyed to a driving end bearing seat, a driven end bearing seat and a gear box through the oil tank, a heat exchanger, a suction pipeline and a discharge pipe group under the action of the lubricating pump, and then returns to the oil tank through a gear box oil return pipe group and a lubricating box oil return pipe group. When high-temperature gear oil flows through the heat exchanger, heat in the high-temperature gear oil is dissipated to the surrounding atmosphere, the gear oil is cooled, and the cooled gear oil is respectively conveyed to the driving end bearing seat, the driven end bearing seat and the gear box by the lubricating pump to perform spray lubrication and cooling on bearings and synchronous gears arranged inside the bearings and the synchronous gears; according to the above, the gear oil circularly flows in the system, so that heat generated at the synchronous gear and the bearing of the twin-screw pump is dissipated, the synchronous gear and the bearing are ensured to be well lubricated and cooled, and the synchronous gear and the bearing are ensured to work in an allowable temperature range.

Drawings

FIG. 1 is a schematic diagram of a self-driving twin-screw pump bearing lubrication system;

FIG. 2 is a front view of a self-driving twin screw pump bearing lubrication system;

FIG. 3 is a top view of a self-driving twin screw pump bearing lubrication system;

FIG. 4 is a mounting diagram of a lubrication pump of a self-driving twin-screw pump bearing lubrication system.

In the figure: 1-a lubrication pump; 2, a coupler; 3-suction line; 4-oil tank; 5, a heat exchanger; 6-a gearbox oil return pipe group; 7-oil return pipe group of lubricating tank; 8-a discharge tube group; 9-driving end bearing seat; 10-a lubrication box; 11-driven end bearing seat; 12-a gearbox; 13-twin screw pump.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, a self-driven double-screw pump bearing lubrication system comprises a lubrication pump 1, a coupling 2, a suction pipeline 3, an oil tank 4, a heat exchanger 5, a gear box oil return pipe group 6, a lubrication box oil return pipe group 7, a discharge pipe group 8, a drive end bearing seat 9, a lubrication box 10, a driven end bearing seat 11, a gear box 12 and a double-screw pump 13, wherein the lubrication pump 1 is fixedly installed on the left side of the gear box 12, the lubrication pump 1 is installed on the gear box 12 in a flange mode, and the lubrication pump 1 can be connected with a main rotating shaft of the double-screw pump 13 or a driven rotating shaft of the double-screw pump 13; the lubricating pump 1 is a positive displacement pump, which can be a gear pump, a vane pump, a plunger pump or a three-screw pump, wherein a gear box 12 is fixedly arranged on the left side of a driven end bearing seat 11, the driven end bearing seat 11 is arranged on the left side of a double-screw pump 13, an oil tank 4 is arranged on a skid seat, the oil tank 4 is a T-shaped closed container, and the cross section of the oil tank 4 can be square or round; the lubricating pump can be an independent body or integrated with a sledge base of a double-screw pump 13, a lubricating pump 1 is connected with a rotating shaft of the double-screw pump 13 through a coupling 2, wherein one end of the coupling 2 is provided with a cylindrical shaft sleeve of a flange plate, a rectangular key groove is arranged in the cylindrical sleeve, the middle of the flange plate is provided with a sub port matched with the rotating shaft of the double-screw pump 13, the periphery of the flange plate is provided with uniformly distributed through holes, a driving end bearing seat 9 is arranged on the right side of the double-screw pump 13, a lubricating box 10 is arranged on the right side of the driving end 9 of the bearing seat, a suction pipeline 3 is arranged at a suction inlet end of the lubricating pump 1, the other end of the suction pipeline 3 is communicated with a heat exchanger 5, the other end of the heat exchanger 5 is communicated with an oil tank 4, a discharge pipe group 8 is arranged at a discharge end of the lubricating, the gearbox 12 is communicated with the oil tank 4 through the gearbox oil return pipe group 6, the lubricating tank 10 is communicated with the oil tank 4 through the lubricating tank oil return pipe group 7, short pipes of loop nuts are arranged at two ends of the gearbox oil return pipe group 6 and the lubricating tank oil return pipe group 7, and interfaces of the short pipes can also be flanges; the main body of the device can be a metal hard tube, and can also be a metal hose or a rubber hose.

When the lubricating system is used, a rotating shaft (which can be a driving shaft or a driven shaft) of the double-screw pump 13 is used as a power source of the lubricating pump 1 of the lubricating system, the lubricating pump 1 is driven to drive gear oil for lubricating and cooling the synchronous gear and the bearing to circularly flow in the system, the gear oil is cooled and cooled by the heat exchanger 5 in the circulating process, then the cooled gear oil is injected into the synchronous gear and the bearing again, the synchronous gear and the bearing are sprayed and lubricated, heat generated by the synchronous gear and the bearing is taken away, and the operating temperature of the synchronous gear and the bearing is not beyond the allowable limit.

Before the lubricating system works, gear oil is filled in an oil tank 4 of the lubricating system, when a double-screw pump 13 works, a rotating shaft of the double-screw pump drives a lubricating pump 1 to run through a coupler 2, the gear oil is respectively conveyed to a driving end bearing seat 9, a driven end bearing seat 11 and a gear box 12 under the action of the lubricating pump 1 through the oil tank 4, a heat exchanger 5, a suction pipeline 3 and a discharge pipe group 8, then returns to the oil tank 4 through a gear box oil return pipe group 6 and a lubricating box oil return pipe group 7, when high-temperature gear oil flows through the heat exchanger 5, heat in the high-temperature gear oil is dissipated to the ambient atmosphere, the gear oil is cooled, and the cooled gear oil is respectively conveyed to the driving end bearing seat 9, the driven end bearing seat 11 and the gear box 12 by the lubricating pump 1 to spray and lubricate and cool bearings and synchronous gears arranged; according to the above, the gear oil circularly flows in the system, so that heat generated at the synchronous gear and the bearing of the twin-screw pump 13 is dissipated, the synchronous gear and the bearing are ensured to be well lubricated and cooled, and the synchronous gear and the bearing are ensured to work in an allowable temperature range.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a self-driven formula double screw pump bearing lubricating system, includes lubricating pump (1), shaft coupling (2), suction line (3), oil tank (4), heat exchanger (5), gear box oil return nest of tubes (6), lubricating case oil return nest of tubes (7), discharge nest of tubes (8), drive end bearing frame (9), lubricating case (10), by drive end bearing frame (11), gear box (12) and double screw pump (13) constitution, its characterized in that: the lubricating pump (1) is fixedly installed on the left side of a gear box (12), the gear box (12) is fixedly installed on the left side of a driven end bearing seat (11), the driven end bearing seat (11) is installed on the left side of a double-screw pump (13), a driving end bearing seat (9) is installed on the right side of the double-screw pump (13), a lubricating box (10) is installed on the right side of the driving end bearing seat (9), a suction pipeline (3) is installed at a suction inlet end of the lubricating pump (1), the other end of the suction pipeline (3) is communicated with a heat exchanger (5), the other end of the heat exchanger (5) is communicated with an oil tank (4), a discharge pipe group (8) is installed at a discharge outlet end of the lubricating pump (1), and the other end of the discharge pipe group (8) is respectively communicated with the gear box (12), the driven end bearing seat (11) and the driving, the gearbox (12) is communicated with the oil tank (4) through a gearbox oil return pipe group (6), and the lubricating box (10) is communicated with the oil tank (4) through a lubricating box oil return pipe group (7).

2. A self-driving twin screw pump bearing lubrication system according to claim 1, wherein: the oil tank (4) is arranged on the skid seat, and the oil tank (4) is a T-shaped closed container.

3. A self-driving twin screw pump bearing lubrication system according to claim 1, wherein: the lubricating pump (1) is connected with a rotating shaft of the double-screw pump (13) through the coupler (2).

4. A self-driving twin screw pump bearing lubrication system according to claim 1, wherein: one end of the coupler (2) is provided with a cylindrical shaft sleeve of a flange plate, a rectangular key groove is arranged in the cylindrical sleeve, the middle of the flange plate is provided with a sub-port matched with a rotating shaft of the double-screw pump (13), and the periphery of the flange plate is provided with uniformly distributed through holes.

5. A self-driving twin screw pump bearing lubrication system according to claim 1, wherein: the two ends of the gear box oil return pipe group (6) and the lubrication box oil return pipe group (7) are short pipes with loop nuts.