High-level oil tank constant pressure compensation device and compensation method

Abstract

The invention discloses a high-level oil tank constant-pressure compensation device and compensation method. The high-level oil tank constant-pressure compensation device comprises a high-level oil tank body used for storing emergency lubricating oil; the main oil pipeline assembly is connected to the oil inlet of the high-position oil tank body; the overflow pipeline assembly and the constant pressure compensation assembly are connected to the oil outlet of the high-level oil tank body through a tee joint; the constant pressure compensation assembly comprises a buffer oil reservoir, a conical sealing cover, a sealing ball and a ventilation cap, an oil inlet of the buffer oil reservoir is communicated with a third connector of the connecting tee joint, the conical sealing cover is in sealing connection with an oil outlet of the buffer oil reservoir, a conical hole is formed in the top of the conical sealing cover, and the ventilation cap is installed at an upper opening of the conical hole; the sealing ball is of a floating ball structure and is arranged in the buffering oil storage device, and the sealing ball can be matched with the conical hole to form one-way sealing. Effective sealing and overflowing during oil supplementing can be achieved, and the pressure flow is stable in emergency.

Description

Technical Field

[0001] This invention relates to the field of oil supply system technology, specifically to a constant pressure compensation device and compensation method for a high-level oil tank. Background Technology

[0002] The elevated oil tank, a key component in thin oil lubrication equipment, primarily provides coasting oil supply during emergency unit shutdowns to lubricate and cool the equipment. It is widely used in large equipment such as steam turbines and centrifuges. It is typically located after a double valve in the oil circuit, with an overflow pipe connected to the top, allowing excess oil to flow back to the main oil tank.

[0003] In existing technologies, the pressure compensation mechanism of elevated oil tanks has significant drawbacks: most elevated oil tanks are not equipped with dedicated pressure compensation components, but are directly connected to the main oil tank via an overflow pipe, relying on the pressure difference between the two to achieve oil return. This design does not adequately consider the pressure and flow stability during pressure holding, and the sealing performance of the connection between the overflow pipe and the elevated oil tank has a significant impact on system operation. Specifically:

[0004] During the oil replenishment process, the increased pressure can easily lead to oil leakage at the overflow pipe joint;

[0005] During emergency oil supply, negative pressure can easily form in the high-level oil tank, resulting in inconsistent oil supply pressure before and after the oil supply. This may cause wear on critical components such as bearing housings and bushings, posing a serious safety hazard.

[0006] Therefore, there is an urgent need for a high-level oil tank constant pressure compensation device that can solve the above-mentioned problems of pressure instability and sealing. Summary of the Invention

[0007] To overcome the shortcomings of existing high-level oil tanks, such as poor sealing during oil replenishment and overflow, and unstable emergency oil supply pressure, a constant pressure compensation device for high-level oil tanks is provided to achieve effective sealing and overflow during oil replenishment and stable pressure and flow during emergencies.

[0008] This invention discloses a high-level oil tank constant pressure compensation device, comprising: a high-level oil tank body for storing emergency lubricating oil; and further comprising:

[0009] A main oil pipeline assembly, which is connected to the oil inlet of the high-level oil tank body;

[0010] An overflow pipeline assembly and a constant pressure compensation assembly are connected to the oil outlet of the high-level oil tank body via a tee.

[0011] in,

[0012] The constant pressure compensation component includes a buffer reservoir, a conical sealing cover, a sealing ball, and a vent cap. The oil inlet of the buffer reservoir is connected to the third interface of the connecting tee. The conical sealing cover is sealed to the oil outlet of the buffer reservoir. A conical hole is provided at the top of the conical sealing cover, and the vent cap is installed at the upper opening of the conical hole. The sealing ball is a float structure and is located inside the buffer reservoir. The sealing ball can cooperate with the conical hole to form a one-way seal.

[0013] As a further improvement of the present invention, the oil inlet of the high-level oil tank is located at the bottom and the oil outlet is located at the top.

[0014] As a further improvement of the present invention, the main oil pipeline assembly includes a main oil pipeline, a first regulating valve, a first connecting pipe, a flow regulating valve and a second connecting pipe connected in sequence, and the oil inlet of the high-level oil tank is connected to the end of the second connecting pipe away from the flow regulating valve.

[0015] As a further improvement of the present invention, the overflow pipeline assembly includes a bend, a third connecting pipe, an oil sight glass, a fourth connecting pipe, a second regulating valve and an overflow pipe connected in sequence. The end of the bend away from the third connecting pipe is connected to the second interface of the tee, and the first interface of the tee is connected to the oil outlet of the high-level oil tank body.

[0016] As a further improvement of the present invention, the oil viewing window is made of high borosilicate glass, and the two ends of the oil viewing window are respectively sealed to the third connecting pipe and the fourth connecting pipe through flanges. The outer wall of the oil viewing window is provided with scale lines.

[0017] As a further improvement of the present invention, the first regulating valve and the second regulating valve are both shut-off valves, the flow regulating valve is a throttle valve, and the valve bodies of the first regulating valve, the flow regulating valve, and the second regulating valve are all made of stainless steel.

[0018] As a further improvement of the present invention, the buffer oil reservoir is provided with a filter screen, and the conical sealing cover is sealed to the oil outlet of the buffer oil reservoir through a connecting flange and a sealing gasket. The filter screen includes a coarse filter screen and a fine filter screen arranged in sequence, and the filter screen is detachably connected to the inner wall of the buffer oil reservoir.

[0019] As a further improvement of the present invention, the tapered hole of the conical sealing cap has a taper of 1:3-1:5, the diameter of the sealing ball is greater than the minimum diameter of the conical hole and less than the maximum diameter of the conical hole, and the breathable cap is provided with a waterproof and breathable membrane.

[0020] As a further improvement of the present invention, it also includes a temperature sensor and a pressure sensor, both of which are installed inside the high-level oil tank for real-time monitoring of the oil temperature and pressure inside the tank.

[0021] This invention also discloses a method for constant pressure compensation in a high-level oil tank, comprising:

[0022] Step 1, Oil Replenishment Stage: Open the first regulating valve and the flow regulating valve. The oil in the main oil pipeline enters the high-level oil tank in sequence through the first regulating valve, the first connecting pipe, the flow regulating valve, and the second connecting pipe. When the oil level in the high-level oil tank reaches the preset height, the excess oil that has not flowed back in time enters the buffer oil reservoir through the tee. As the oil level in the buffer oil reservoir rises, the sealing ball floats up and fits with the conical hole of the conical sealing cap to form a seal, preventing the oil from continuing to overflow. At the same time, the buffer oil reservoir absorbs the residual pressure of the replenishment oil.

[0023] Step 2, Emergency Fuel Supply Stage: When the unit shuts down in an emergency, the oil in the high-level oil tank flows to the bearing housing through the tee, bend, third connecting pipe, oil sight glass, fourth connecting pipe, second regulating valve, and overflow pipe; at this time, the vent cap balances the air pressure inside and outside the high-level oil tank in real time to ensure that the pressure inside the tank is consistent with atmospheric pressure.

[0024] Step 3, Pressure Relief and Return Stage: After the emergency oil supply is completed, open the second regulating valve. Under the action of gravity, the oil in the buffer reservoir pushes the sealing ball out of the conical hole and returns to the main oil tank through the tee and overflow pipeline assembly. After the buffer reservoir is emptied, close the second regulating valve to complete one constant pressure compensation cycle.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] 1. The present invention effectively prevents oil leakage during the oil replenishment and overflow stages by using a one-way sealing mechanism composed of a buffer oil reservoir, a conical sealing cap and a sealing ball.

[0027] 2. The present invention, in conjunction with the sealing gasket and the fastening connection of the connecting flange, significantly enhances the sealing performance of each connection point;

[0028] 3. The vent cap of the present invention can balance the air pressure inside and outside the high-level oil tank in real time, avoid pressure fluctuations caused by negative pressure during emergency oil supply, ensure continuous and stable oil supply pressure and flow, and effectively protect lubricated components such as bearing housing and bearing bush;

[0029] 4. The buffer oil reservoir of the present invention can temporarily store excess oil, alleviate the pressure shock during oil replenishment, and achieve pressure adaptive overflow through the cooperation of the sealing ball and the conical hole, eliminate the overflow residual pressure, and ensure smooth return flow. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the high-level oil tank constant pressure compensation device disclosed in this invention.

[0031] In the picture:

[0032] 1. Main oil pipeline; 2. First regulating valve; 3. First connecting pipe; 4. Flow regulating valve; 5. Second connecting pipe; 6. High-level oil tank body; 7. Tee; 8. Buffer oil reservoir; 9. Filter screen; 10. Connecting flange; 11. Sealing gasket; 12. Conical sealing cap; 13. Sealing ball; 14. Vent cap; 15. Bend; 16. Third connecting pipe; 17. Oil sight glass; 18. Fourth connecting pipe; 19. Second regulating valve; 20. Overflow pipe. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] The present invention will now be described in further detail with reference to the accompanying drawings:

[0035] like Figure 1 As shown, this invention provides a high-level oil tank constant pressure compensation device, which can ensure the continuous sealing performance of the high-level oil tank during oil level replenishment, allowing for effective overflow; in emergency use of the high-level oil tank, it optimizes the pressure correlation between the high-level oil tank and the external environment and the oil tank, utilizing air pressure to connect with the high-level oil tank, ensuring continuous stability of pressure and flow rate during emergency oil supply; specifically, it includes: a high-level oil tank body 6, a main oil pipeline assembly, an overflow pipeline assembly, and a constant pressure compensation assembly; wherein,

[0036] The high-level oil tank body 6 of the present invention is used to store emergency lubricating oil. The oil inlet of the high-level oil tank body 6 is located at the bottom and the oil outlet is located at the top.

[0037] The main oil pipeline assembly of the present invention is connected to the oil inlet of the high-level oil tank body 6 for oil replenishment and emergency oil supply to the high-level oil tank; the main oil pipeline assembly includes a main oil pipeline 1, a first regulating valve 2, a first connecting pipe 3, a flow regulating valve 4 and a second connecting pipe 5 connected in sequence, and the oil inlet of the high-level oil tank body 6 is connected to the end of the second connecting pipe 5 away from the flow regulating valve 4.

[0038] The overflow pipeline assembly of the present invention is connected to the oil outlet of the high-level oil tank body via a tee 7. The overflow pipeline assembly is used to return excess oil in the high-level oil tank body 6 to the main oil tank. The overflow pipeline assembly includes a bend 15, a third connecting pipe 16, an oil sight glass 17, a fourth connecting pipe 18, a second regulating valve 19, and an overflow pipe 20 connected in sequence. The end of the bend 15 away from the third connecting pipe 16 is connected to the second interface of the tee 7, and the first interface of the tee 7 is connected to the oil outlet of the high-level oil tank body 6. Furthermore, the oil sight glass 17 is made of high borosilicate glass, and both ends of the oil sight glass 17 are sealed to the third connecting pipe 16 and the fourth connecting pipe 18 respectively via flanges. The outer wall of the oil sight glass 17 is provided with scale lines. Furthermore, the first regulating valve 2 and the second regulating valve 19 are both shut-off valves, the flow regulating valve 4 is a throttle valve, and the valve bodies of the first regulating valve 2, the flow regulating valve 4, and the second regulating valve 19 are all made of stainless steel.

[0039] The constant pressure compensation component of this invention is connected to the oil outlet of the high-level oil tank body via a three-way valve 7. The constant pressure compensation component is used to balance the pressure during oil replenishment and emergency oil supply to the high-level oil tank. The constant pressure compensation component includes a buffer reservoir 8, a conical sealing cap 12, a sealing ball 13, and a vent cap 14. The oil inlet of the buffer reservoir 8 is connected to the third interface of the three-way valve 7. The conical sealing cap 12 is sealed to the oil outlet of the buffer reservoir 8. A conical hole is provided at the top of the conical sealing cap 12, and the vent cap 14 is installed at the upper opening of the conical hole to balance the air pressure inside and outside the high-level oil tank body 6. The sealing ball 13 is a float structure and is located inside the buffer reservoir 8. The sealing ball 13 can cooperate with the conical hole to form a one-way seal. The buffer oil reservoir 8 is equipped with a filter screen 9. A conical sealing cover 12 is sealed to the oil outlet of the buffer oil reservoir 8 via a connecting flange 10 and a sealing gasket 11. The filter screen 9 includes a coarse filter screen and a fine filter screen arranged sequentially. The coarse filter screen has a pore size of 0.5-1 mm, and the fine filter screen has a pore size of 0.1-0.2 mm. The filter screen 9 is detachably connected to the inner wall of the buffer oil reservoir 8. Furthermore, the buffer oil reservoir 8 has a cylindrical structure, and its volume is 1 / 10-1 / 8 of the volume of the high-level oil tank 6. The inner wall of the buffer oil reservoir 8 is coated with an anti-corrosion coating. Furthermore, the tapered hole of the conical sealing cover 12 has a taper of 1:3-1:5. The diameter of the sealing ball 13 is larger than the minimum diameter of the conical hole but smaller than the maximum diameter of the conical hole. The sealing ball 13 is made of oil-resistant rubber. The vent cap 14 is equipped with a waterproof and breathable membrane with a permeability of 5-10 L / min.

[0040] Furthermore, it also includes temperature and pressure sensors, both of which are installed inside the high-level oil tank 6 to monitor the temperature and pressure of the oil inside the tank in real time.

[0041] This invention also provides a method for constant pressure compensation in a high-level oil tank, comprising:

[0042] S1. Replenishment Stage: Open the first regulating valve 2 and the flow regulating valve 4. The oil in the main oil pipeline 1 enters the high-level oil tank 6 sequentially through the first regulating valve 2, the first connecting pipe 3, the flow regulating valve 4, and the second connecting pipe 5. When the oil level in the high-level oil tank 6 reaches the preset height, the excess oil that has not flowed back in time enters the buffer reservoir 8 through the tee 7. As the oil level in the buffer reservoir 8 rises, the sealing ball 13 floats up and fits against the conical hole of the conical sealing cover 12 to form a seal, preventing the oil from overflowing further. At the same time, the buffer reservoir 8 absorbs the residual pressure of the replenishment oil, preventing a sudden increase in pressure in the overflow pipeline components. Observe the overflow situation through the oil sight glass 17. After the overflow stabilizes, close the first regulating valve 2 and the flow regulating valve 4.

[0043] S2, Emergency Fuel Supply Phase: When the unit shuts down in an emergency, the oil in the high-level oil tank 6 flows to the bearing housing via the tee 7, bend 15, third connecting pipe 16, oil sight glass 17, fourth connecting pipe 18, second regulating valve 19, and overflow pipe 20. At this time, the vent cap 14 balances the air pressure inside and outside the high-level oil tank 6 in real time to ensure that the pressure inside the tank is consistent with atmospheric pressure and to avoid a drop in oil supply pressure due to negative pressure.

[0044] S3, Pressure Relief and Return Stage: After the emergency oil supply is completed, the second regulating valve 19 is opened. Under the action of gravity, the oil in the buffer reservoir 8 pushes the sealing ball 13 out of the conical orifice and returns to the main oil tank through the tee 7 and the overflow pipeline assembly. After the buffer reservoir 8 is emptied, the second regulating valve 19 is closed, completing one constant pressure compensation cycle. The advantages of this invention are:

[0045] 1. This invention improves the sealing performance of all connections in the high-level oil tank;

[0046] 2. This invention ensures the continuous effectiveness of oil supply pressure and flow rate during emergency oil supply from the high-level oil tank, effectively preventing wear of on-site lubrication components;

[0047] 3. The design of this invention can effectively eliminate residual pressure when oil overflows from the high-level oil tank, ensuring buffered backflow.

[0048] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-level oil tank constant pressure compensation device, comprising: The high-level oil tank body (6) for storing emergency lubricating oil; characterized in that it further includes: The main oil pipeline assembly is connected to the oil inlet of the high-level oil tank body (6); Overflow pipeline assembly and constant pressure compensation assembly, wherein the overflow pipeline assembly and constant pressure compensation assembly are connected to the oil outlet of the high-level oil tank body via a tee (7); in, The constant pressure compensation component includes a buffer reservoir (8), a conical sealing cover (12), a sealing ball (13), and a vent cap (14). The oil inlet of the buffer reservoir (8) is connected to the third interface of the connecting tee (7). The conical sealing cover (12) is sealed to the oil outlet of the buffer reservoir (8). The top of the conical sealing cover (12) has a conical hole. The vent cap (14) is installed at the upper opening of the conical hole. The sealing ball (13) is a float structure and is located inside the buffer reservoir (8). The sealing ball (13) can cooperate with the conical hole to form a one-way seal.

2. The high-level oil tank constant pressure compensation device according to claim 1, characterized in that, The oil inlet of the high-level oil tank body (6) is located at the bottom and the oil outlet is located at the top.

3. The high-level oil tank constant pressure compensation device according to claim 1, characterized in that, The main oil pipeline assembly includes a main oil pipeline (1), a first regulating valve (2), a first connecting pipe (3), a flow regulating valve (4), and a second connecting pipe (5) connected in sequence. The oil inlet of the high-level oil tank body (6) is connected to the end of the second connecting pipe (5) away from the flow regulating valve (4).

4. The high-level oil tank constant pressure compensation device according to claim 3, characterized in that, The overflow pipeline assembly includes a bend (15), a third connecting pipe (16), an oil sight glass (17), a fourth connecting pipe (18), a second regulating valve (19), and an overflow pipe (20) connected in sequence. The end of the bend (15) away from the third connecting pipe (16) is connected to the second interface of the tee (7), and the first interface of the tee (7) is connected to the oil outlet of the high-level oil tank body (6).

5. The high-level oil tank constant pressure compensation device according to claim 4, characterized in that, The oil viewing window (17) is made of high borosilicate glass. The two ends of the oil viewing window (17) are respectively sealed to the third connecting pipe (16) and the fourth connecting pipe (18) through flanges. The outer wall of the oil viewing window (17) is provided with scale lines.

6. The high-level oil tank constant pressure compensation device according to claim 4, characterized in that, The first regulating valve (2) and the second regulating valve (19) are both shut-off valves, and the flow regulating valve (4) is a throttle valve. The valve bodies of the first regulating valve (2), the flow regulating valve (4), and the second regulating valve (19) are all made of stainless steel.

7. The high-level oil tank constant pressure compensation device according to claim 1, characterized in that, The buffer oil reservoir (8) is equipped with a filter screen (9). The conical sealing cover (12) is sealed to the oil outlet of the buffer oil reservoir (8) through a connecting flange (10) and a sealing gasket (11). The filter screen (9) includes a coarse filter screen and a fine filter screen arranged in sequence. The filter screen (9) is detachably connected to the inner wall of the buffer oil reservoir (8).

8. The high-level oil tank constant pressure compensation device according to claim 1, characterized in that, The tapered hole of the conical sealing cap (12) has a taper of 1:3-1:5, and the diameter of the sealing ball (13) is greater than the minimum diameter of the conical hole and less than the maximum diameter of the conical hole; the breathable cap (14) is provided with a waterproof and breathable membrane.

9. The high-level oil tank constant pressure compensation device according to claim 1, characterized in that, It also includes a temperature sensor and a pressure sensor, both of which are installed inside the high-level oil tank (6) for real-time monitoring of the oil temperature and pressure inside the tank.

10. A method for constant pressure compensation in a high-level oil tank, based on the constant pressure compensation device for a high-level oil tank as described in claim 4, characterized in that, include: Step 1, Oil replenishment stage: Open the first regulating valve (2) and the flow regulating valve (4). The oil in the main oil pipeline (1) enters the high-level oil tank (6) through the first regulating valve (2), the first connecting pipe (3), the flow regulating valve (4), and the second connecting pipe (5) in sequence. When the oil level in the high-level oil tank (6) reaches the preset height, the excess oil that has not flowed back in time enters the buffer reservoir (8) through the tee (7). As the oil level in the buffer reservoir (8) rises, the sealing ball (13) floats up and fits with the conical hole of the conical sealing cover (12) to form a seal, preventing the oil from overflowing. At the same time, the buffer reservoir (8) absorbs the residual pressure of the replenishment oil. Step 2, Emergency Fuel Supply Stage: When the unit shuts down in an emergency, the oil in the high-level oil tank (6) flows to the bearing box through the tee (7), bend (15), third connecting pipe (16), oil sight glass (17), fourth connecting pipe (18), second regulating valve (19), and overflow pipe (20); at this time, the vent cap (14) balances the air pressure inside and outside the high-level oil tank (6) in real time to ensure that the pressure inside the tank is consistent with the atmospheric pressure. Step 3, Pressure Relief and Return Stage: After the emergency oil supply is completed, open the second regulating valve (19). Under the action of gravity, the oil in the buffer reservoir (8) pushes the sealing ball (13) out of the conical hole and returns to the main oil tank through the tee (7) and the overflow pipeline assembly. After the buffer reservoir (8) is emptied, close the second regulating valve (19) to complete one constant pressure compensation cycle.

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