A skid-mounted compressor unit capable of achieving long-cycle oil supply

Abstract

The utility model relates to the field of centrifugal compressors. In order to solve the problem that the existing compressor units cannot operate for a long period of time, a skid-mounted compressor unit capable of realizing long-period oil supply is proposed. The unit comprises a motor, a gear box, a compressor, a base, a main oil supply pipe, a high-position oil tank and a main oil supply pipe. A lubricating oil station is arranged in the base. The lubricating oil station comprises an oil tank and a main oil pump arranged in the base. One end of the main oil pump is connected to the free end of the low-speed shaft of the gear box. The oil inlet of the main oil pump is connected to the oil tank through the main oil pump oil inlet pipe, and the oil outlet of the main oil pump is connected to the main oil supply pipe through the main oil pump oil return pipe. The oil inlets of the motor, the gear box and the compressor are all connected to the main oil supply pipe, and the oil return ports of the motor, the gear box and the compressor are all connected to the oil tank. The oil inlet and outlet of the high-position oil tank are connected to the main oil supply pipe, and the oil return port of the high-position oil tank is connected to the oil tank. An auxiliary oil pump and a fault auxiliary oil pump are also arranged between the oil tank and the main oil supply pipe.

Description

Technical Field

[0001] The utility model relates to the field of centrifugal compressors, in particular to a skid-mounted compressor unit capable of realizing long-cycle oil supply. Background Art

[0002] Centrifugal compressor units are widely used in many fields such as metallurgy, petrochemicals, chemicals, electronics, light industry, aerospace, etc. With the development of technology, users have put forward higher technical requirements for suppliers to meet application needs such as reducing equipment downtime rate, saving land to reduce investment costs, and integrating functions to reduce operating costs.

[0003] At present, most conventional centrifugal compressor units adopt a double-layer layout, especially large compressor units, which need to design a two-layer concrete platform. The motor, gearbox, and compressor are all arranged on the second-layer platform, and these shafting equipment all use separate bases. The lubricating oil station system required by the unit is arranged on the first floor, and the oil station is connected to each oil-using equipment through pipelines. There are shortcomings such as large floor space, inconvenient installation, difficult design, high plant height, and many lubricating oil connection points, resulting in high overall cost, large investment, and long construction period.

[0004] At present, conventional centrifugal compressor units basically adopt the main and auxiliary oil pump design, in which the main and auxiliary oil pumps are both installed on the lubricating oil station. Under normal circumstances, the main oil pump is used. When the oil pressure is insufficient or the main oil pump fails, the auxiliary oil pump (auxiliary oil pump) needs to be started to work. However, the auxiliary oil pump may also fail during operation, causing the unit to shut down and the risk of production suspension, which cannot meet the long-term operation required by users. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of existing centrifugal compressor units, such as large footprint, inconvenient installation, great design difficulty, high plant height, and many lubricating oil connection points, which lead to high overall cost, large investment, and long construction period. In addition, the main and auxiliary oil pumps may fail during operation, causing the unit to shut down and production to stop, resulting in the inability to ensure long-term operation. The utility model proposes a skid-mounted compressor unit that can achieve long-term oil supply.

[0006] In order to achieve the above purpose, the technical solution proposed by the utility model is:

[0007] A skid-mounted compressor unit capable of achieving long-cycle oil supply comprises a motor, a gearbox, a compressor, a base, a main oil supply pipe, a high-position oil tank and a main oil supply pipe connected to the main oil supply pipe; the motor is connected to a low-speed shaft of the gearbox through a first coupling, the high-speed shaft of the gearbox is connected to the compressor through a second coupling, the gearbox and the compressor are both mounted on the base, and a lubricating oil station is arranged in the base; the special features thereof are:

[0008] The lubricating oil station comprises a main oil pump and an oil tank arranged in a base, wherein the driving end of the main oil pump is connected to the free end of the low-speed shaft of the gear box; the oil inlet of the main oil pump is connected to the oil tank through the main oil pump oil inlet pipe, and the oil outlet of the main oil pump is connected to the main oil supply pipe through the main oil pump oil return pipe;

[0009] The oil inlets of the motor, gearbox and compressor are all connected to the main oil supply pipe, and the oil return ports are all connected to the oil tank; the oil inlet and outlet of the high-position oil tank are connected to the main oil supply pipe through the high-position oil tank lubricating oil inlet and outlet pipes, and the oil return port of the high-position oil tank is connected to the oil tank;

[0010] An auxiliary oil pump and a fault auxiliary oil pump are arranged between the oil tank and the main oil supply pipe to assist the main oil pump in working.

[0011] Furthermore, the oil outlet of the main oil pump is also connected to the oil tank through the main oil pump return pipe and the check valve, and the cut-off direction of the check valve is to flow to the oil tank; the main oil pump return pipe is connected to the main oil supply pipe through the oil filling pipe and the oil filling pipe check valve, and the cut-off direction of the oil filling pipe check valve is to flow to the main oil pump return pipe;

[0012] A check valve is arranged between the main oil pump inlet pipe and the oil tank, and the cut-off direction of the check valve is to flow toward the oil tank; the main oil pump inlet pipe is also connected to the main oil supply pipe through the oil filling pipe and the oil filling pipe check valve, and the cut-off direction of the oil filling pipe check valve is to flow toward the main oil pump inlet pipe.

[0013] Furthermore, the oil tank is connected to the main oil supply pipe through a regulating valve group for controlling the stability of the regulating oil pressure; the oil inlet end of the regulating valve group is connected to the main oil supply pipe, and the oil outlet end is connected to the oil tank.

[0014] Furthermore, auxiliary check valves are provided between the auxiliary oil pump and the faulty auxiliary oil pump and the main oil supply pipe.

[0015] Furthermore, a duplex oil cooler and a duplex oil filter are sequentially arranged on the main oil supply pipe along the flow direction of the lubricating oil.

[0016] Furthermore, an oil-side exhaust pipe is provided between the oil pipe and the oil tank in the dual oil cooler.

[0017] Further, the compressor is a built-in cooling compressor;

[0018] The first coupling is a diaphragm coupling;

[0019] The second coupling is a rigid coupling.

[0020] Furthermore, a sewage outlet is also provided on the high-position oil tank.

[0021] Furthermore, the electric motor and the compressor are both provided with two oil inlets and two oil return ports, and the two oil inlets are both connected to the main oil supply pipe, and the two oil return ports are both connected to the oil tank.

[0022] Furthermore, an electric heater is arranged below one end of the oil tank, and an oil tank drain port is arranged below the other end; a purifier interface, an air filter and an oil mist exhaust fan are arranged above the oil tank.

[0023] Beneficial effects of the utility model:

[0024] [1] The utility model is a skid-mounted compressor unit that can achieve long-cycle oil supply. The structure has high integration, effectively reduces the footprint of the equipment, reduces construction costs and production costs, has a simple installation method, high unit operating efficiency, is easy to operate and maintain during use, has a significant overall energy-saving effect, and has a low shutdown rate, which can effectively ensure the long-term operation of the unit.

[0025] 【2】The utility model drives the main oil pump to work through the free end of the low-speed shaft of the gear box, and arranges an auxiliary oil pump and a fault auxiliary oil pump between the oil tank and the main oil supply pipe. When the unit is operating normally, the main oil pump meets the oil supply requirements of the unit under the drive of the gear box;

[0026] When the main oil pump fails, the auxiliary oil pump can supply oil to the unit; when the main oil pump fails and the auxiliary oil pump fails, the faulty auxiliary oil pump can still meet the normal operation of the unit and meet the user's requirements for long-term operation, ensuring the reliability of the unit's oil supply;

[0027] In addition, the auxiliary oil pump and the faulty auxiliary oil pump can be removed online for inspection and maintenance, which can effectively extend the service life of the unit and improve the safety and reliability of the unit;

[0028] At the same time, under normal circumstances, the auxiliary oil pump and the faulty auxiliary oil pump do not work, and the main oil pump works, which can achieve the purpose of energy saving and effectively reduce production and operation costs.

[0029] [3] In the utility model, the oil inlet and the oil outlet of the main oil pump are connected to the oil tank through the main oil pump inlet pipe and the main oil pump return pipe respectively, wherein the main oil pump inlet pipe and the main oil pump return pipe are both provided with an oil filling pipe connected to the main oil supply pipe. The cooperation between the check valves on the main oil pump inlet pipe and the main oil pump return pipe and the oil filling pipe check valve on the oil filling pipe can realize the mutual switching between the oil inlet and the oil outlet of the main oil pump. There is no need to consider the rotation direction of the main oil pump, and the oil supply requirement of the unit can be met, thereby ensuring the normal operation of the unit and effectively reducing the failure rate of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of an embodiment of a skid-mounted compressor unit capable of achieving long-cycle oil supply according to the utility model;

[0031] Figure 2 This is a schematic diagram of the connection structure of the lubricating oil circuit in the embodiment of the utility model;

[0032] Reference numerals:

[0033] 1-motor, 2-first coupling, 3-gearbox, 4-second coupling, 5-compressor, 6-base, 7-lubricating oil station, 8-oil tank, 9-main oil pump, 10-main oil supply pipe, 11-main oil supply pipe, 12-high-level oil tank lubricating oil inlet and outlet pipes, 13-high-level oil tank, 14-auxiliary oil pump, 15-faulty auxiliary oil pump, 16-main oil pump inlet pipe, 17-main oil pump return pipe, 18-dual oil cooler, 19-dual oil filter, 20-oil side exhaust pipe, 21-oil filling pipe check valve, 22-regulating valve group, 23-electric heater, 24-purifier interface, 25-oil tank drain outlet, 26-air filter, 27-oil exhaust mist fan, 28-drain outlet, 29-check valve, 30-auxiliary check valve, 31-oil filling pipe. DETAILED DESCRIPTION

[0034] A skid-mounted compressor unit that can achieve long-term oil supply, such as Figure 1 and Figure 2 As shown, it includes an electric motor 1, a gear box 3, a compressor 5, a base 6, a main oil supply pipe 10, a high-position oil tank 13 and a main oil supply pipe 11 connected to the main oil supply pipe 10. The electric motor 1 is connected to the low-speed shaft of the gear box 3 through a first coupling 2, and the high-speed shaft of the gear box 3 is connected to the compressor 5 through a second coupling 4; the gear box 3 and the compressor 5 are both installed on the base 6, and a lubricating oil station 7 is arranged in the base 6.

[0035] The lubricating oil station 7 includes a main oil pump 9 and an oil tank 8 arranged in the base 6. The main oil pump 9 is connected to the free end of the low-speed shaft of the gear box 3, and the gear box 3 provides power for the main oil pump 9; the oil inlet of the main oil pump 9 is connected to the oil tank 8 through the main oil pump oil inlet pipe 16, and its oil outlet is connected to the main oil supply pipe 10 through the main oil pump return pipe 17; in this embodiment, the oil outlet of the main oil pump 9 is connected to the oil tank 8 through the main oil pump return pipe 17 and the check valve 29, and the cut-off direction of the check valve 29 is to flow to the oil tank 8; the main oil pump return pipe 17 is connected to the main oil supply pipe 10 through the oil filling pipe 31 and the oil filling pipe check valve 21 are connected to the main oil supply pipe 10, and the cut-off direction of the oil filling pipe check valve 21 is to flow to the main oil pump return pipe 17; a check valve 29 is arranged between the main oil pump oil inlet pipe 16 and the oil tank 8, and the cut-off direction of the check valve 29 is to flow to the oil tank 8; the main oil pump oil inlet pipe 16 is also connected to the main oil supply pipe 10 through the oil filling pipe 31 and the oil filling pipe check valve 21, and the cut-off direction of the oil filling pipe check valve 21 is to flow to the main oil pump oil inlet pipe 16, which is used to realize the mutual switching between the oil inlet and the oil outlet of the main oil pump 9.

[0036] The oil inlet and the oil outlet of the main oil pump 9 are connected to the oil tank 8 through the main oil pump inlet pipe 16 and the main oil pump return pipe 17 respectively, wherein the main oil pump inlet pipe 16 and the main oil pump return pipe 17 are both provided with an oil filling pipe 31 connected to the main oil supply pipe 10, and the mutual switching between the oil inlet and the oil outlet of the main oil pump 9 can be realized by the cooperation between the check valve 29 on the main oil pump inlet pipe 16 and the main oil pump return pipe 17 and the oil filling pipe check valve 21 on the oil filling pipe 31, without considering the rotation direction of the main oil pump 9, the oil supply requirement of the unit can be met;

[0037] A regulating valve group 22 is arranged between the oil tank 8 and the main oil supply pipe 10 for controlling the stability of the regulating oil pressure; the oil inlet end of the regulating valve group 22 is connected to the main oil supply pipe 10, and the oil outlet end thereof is connected to the oil tank 8; the regulating valve group 22 is a conventional regulating valve group of the lubricating oil station 7.

[0038] An auxiliary oil pump 14 and a faulty auxiliary oil pump 15 are also provided between the oil tank 8 and the main oil supply pipe 10, and an auxiliary check valve 30 is provided between the auxiliary oil pump 14 and the faulty auxiliary oil pump 15 and the main oil supply pipe 10; when the unit is started, the auxiliary oil pump 14 can be used to supply oil to the unit, and when the unit is operating normally, the main oil pump 9 meets the unit's oil supply requirements under the drive of the gear box 3; when the main oil pump 9 fails, the auxiliary oil pump 14 can supply oil to the unit; when the main oil pump 9 fails, the auxiliary oil pump 14 fails, the faulty auxiliary oil pump 15 can still meet the normal operation of the unit, and the auxiliary oil pump 14 can be repaired online to meet the user's long-term operation requirements. At the same time, under normal circumstances, the auxiliary oil pump 14 and the faulty auxiliary oil pump 15 do not work, and the main oil pump 9 works, achieving the purpose of energy saving.

[0039] A duplex oil cooler 18 and a duplex oil filter 19 are sequentially arranged on the main oil supply pipe 10 along the flow direction of the lubricating oil. The duplex oil cooler 18 and the duplex oil filter 19 can be switched online by a three-way switching valve arranged on the duplex oil cooler 18 and the duplex oil filter 19; an oil-side exhaust pipe 20 is arranged between the oil pipe in the duplex oil cooler 18 and the oil tank 8.

[0040] The oil inlets of the motor 1, the gearbox 3, and the compressor 5 are all connected to the main oil supply pipe 11, and the oil return ports are all connected to the oil tank 8; the oil inlet and outlet of the high-level oil tank 13 are connected to the main oil supply pipe 10 through the high-level oil tank lubricating oil inlet and outlet pipe 12, and the oil return port of the high-level oil tank 13 is connected to the oil tank 8;

[0041] The oil inlet and outlet of the high-level oil tank 13 are connected to the main oil supply pipe 10 through the high-level oil tank lubricating oil inlet and outlet pipe 12, and the oil return port of the high-level oil tank 13 is connected to the oil tank 8; the motor 1 and the compressor 5 are both provided with two oil inlets and two oil return ports, and the gear box 3 is provided with an oil inlet and an oil return port. Lubricating oil is provided to each lubrication point through the main oil supply pipe 11 and each branch pipe, and oil is supplied and discharged to the high-level oil tank 13 through the high-level oil tank lubricating oil inlet and outlet pipe 12; the return oil of each equipment and the high-level oil tank 13 is directly returned to the oil tank 8; the high-level oil tank 13 is also provided with an oil drain port 28.

[0042] An electric heater 23 is provided below one end of the oil tank 8, and an oil tank drain port 25 is provided below the other end; a purifier interface 24, an air filter 26 and an oil mist blower 27 are provided above the oil tank 8 to assist the normal operation of the oil station.

[0043] The compressor 5 is a built-in cooling type compressor; the first coupling 2 adopts a diaphragm coupling, and the second coupling 4 is a rigid coupling.

[0044] The built-in cooling compressor adopts axial air intake and inlet guide vane adjustment at the compressor inlet. The flow and pressure of the centrifugal compressor can be regulated by adjusting the inlet guide vane. At the same time, the built-in cooler can minimize the pressure loss and is isothermal compression, which significantly improves the efficiency of the compressor and reduces energy consumption.

[0045] The gearbox 3, the second coupling 4, the compressor 5 and other shafting equipment, as well as the base 6 and the lubricating oil station 7 together form a skid-mounted structure. The motor has a separate base. The height of the motor part concrete foundation is adjusted according to the height difference with the skid-mounted structure. The unit is installed on the first floor of the plant as a whole (no need to design a second-floor concrete platform). It has the advantages of highly integrated units, highly intensive land area, low plant height, quick and convenient on-site installation, low comprehensive cost, and small one-time investment.

[0046] In the embodiment of the present invention, the main oil pump 9 is used under normal circumstances, and no motor drive is required, and long-term operation saves energy significantly; at the same time, the auxiliary oil pump 14 and the fault auxiliary oil pump 15 can ensure that the unit continues to operate when the main oil pump 9 fails, thereby ensuring the user's production needs.

[0047] The utility model can save a lot of time for users from the perspective of design, is easy and convenient to install on site, has high unit operation efficiency, convenient operation and maintenance, significant energy-saving effect, and low comprehensive shutdown rate.

Claims

1. A skid-mounted compressor unit capable of achieving long-cycle oil supply, comprising a motor (1), a gear box (3), a compressor (5), a base (6), a main oil supply pipe (10), a high-position oil tank (13) and a main oil supply pipe (11) connected to the main oil supply pipe (10); the motor (1) is connected to a low-speed shaft of the gear box (3) through a first coupling (2), the high-speed shaft of the gear box (3) is connected to the compressor (5) through a second coupling (4), the gear box (3) and the compressor (5) are both mounted on the base (6), and a lubricating oil station (7) is arranged in the base (6); the characteristics are: The lubricating oil station (7) comprises a main oil pump (9) and an oil tank (8) arranged in a base (6); the driving end of the main oil pump (9) is connected to the free end of the low-speed shaft of the gear box (3); the oil inlet of the main oil pump (9) is connected to the oil tank (8) through a main oil pump oil inlet pipe (16), and the oil outlet is connected to the main oil supply pipe (10) through a main oil pump oil return pipe (17); The oil inlets of the motor (1), the gear box (3) and the compressor (5) are all connected to the main oil supply pipe (11), and the oil return ports are all connected to the oil tank (8); the oil inlet and outlet ports of the high-position oil tank (13) are connected to the main oil supply pipe (10) via the high-position oil tank lubricating oil inlet and outlet pipe (12), and the oil return port of the high-position oil tank (13) is connected to the oil tank (8); An auxiliary oil pump (14) and a fault auxiliary oil pump (15) are arranged between the oil tank (8) and the main oil supply pipe (10) to assist the main oil pump (9) in its operation.

2. A skid-mounted compressor unit capable of achieving long-cycle oil supply according to claim 1, characterized in that: The oil outlet of the main oil pump (9) is also connected to the oil tank (8) through the main oil pump return pipe (17) and the check valve (29), and the cut-off direction of the check valve (29) is to flow toward the oil tank (8); the main oil pump return pipe (17) is connected to the main oil supply pipe (10) through the oil filling pipe (31) and the oil filling pipe check valve (21), and the cut-off direction of the oil filling pipe check valve (21) is to flow toward the main oil pump return pipe (17); A check valve (29) is provided between the main oil pump oil inlet pipe (16) and the oil tank (8), and the cut-off direction of the check valve (29) is to flow toward the oil tank (8); the main oil pump oil inlet pipe (16) is also connected to the main oil supply pipe (10) through an oil filling pipe (31) and an oil filling pipe check valve (21), and the cut-off direction of the oil filling pipe check valve (21) is to flow toward the main oil pump oil inlet pipe (16).

3. A skid-mounted compressor unit capable of achieving long-cycle oil supply according to claim 2, characterized in that: The oil tank (8) is connected to the main oil supply pipe (10) via a regulating valve group (22) for controlling the stability of the oil pressure; the oil inlet end of the regulating valve group (22) is connected to the main oil supply pipe (10), and the oil outlet end is connected to the oil tank (8).

4. A skid-mounted compressor unit capable of achieving long-cycle oil supply according to claim 1, 2 or 3, characterized in that: Auxiliary check valves (30) are provided between the auxiliary oil pump (14) and the faulty auxiliary oil pump (15) and the main oil supply pipe (10).

5. According to claim 4, a skid-mounted compressor unit capable of achieving long-cycle oil supply is characterized in that: A duplex oil cooler (18) and a duplex oil filter (19) are sequentially arranged on the main oil supply pipe (10) along the flow direction of the lubricating oil.

6. According to claim 5, a skid-mounted compressor unit capable of achieving long-cycle oil supply is characterized in that: An oil-side exhaust pipe (20) is provided between the oil pipe in the double oil cooler (18) and the oil tank (8).

7. A skid-mounted compressor unit capable of achieving long-cycle oil supply according to claim 6, characterized in that: The compressor (5) is a built-in cooling type compressor; The first coupling (2) is a diaphragm coupling; The second coupling (4) is a rigid coupling.

8. A skid-mounted compressor unit capable of achieving long-cycle oil supply according to claim 7, characterized in that: The high-position oil tank (13) is also provided with a sewage outlet (28).

9. A skid-mounted compressor unit capable of achieving long-cycle oil supply according to claim 8, characterized in that: The motor (1) and the compressor (5) are both provided with two oil inlets and two oil return ports, and the two oil inlets are both connected to the main oil supply pipe (11), and the two oil return ports are both connected to the oil tank (8).

10. A skid-mounted compressor unit capable of achieving long-cycle oil supply according to claim 9, characterized in that: An electric heater (23) is arranged below one end of the oil tank (8), and an oil tank drain port (25) is arranged below the other end; a purifier interface (24), an air filter (26) and an oil mist exhaust fan (27) are arranged above the oil tank (8).

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