Lubricating oil temperature control device of centrifugal compressor
By designing the lubricating oil temperature control device of centrifugal compressor, the flow rate of hot and cold oil is controlled by using solenoid valves to achieve constant control of lubricating oil temperature, and when the temperature control valve fails or needs to be replaced, the temperature control valve is cut off through the backup oil circuit when the temperature control valve fails or needs to be replaced. The oil circuit solves the problem of shutdown during temperature control valve failure and replacement, ensuring the normal operation and continuous production of the compressor.
Patent Information
- Application Number
- CN202421386852.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-06-18
AI Technical Summary
In existing centrifugal compressors, the temperature control valve is prone to stagnation and failure due to impurities in the lubricating oil, which affects the operation of the compressor. Moreover, the temperature control valve needs to be shut down when replacing it, delaying production.
A centrifugal compressor lubricating oil temperature control device is designed, including an oil pump, an oil cooler, a temperature control valve and a backup oil circuit. The flow rate of hot and cold oil is controlled through the solenoid valve to achieve constant control of the lubricating oil temperature, and When the temperature control valve fails or needs to be replaced, the temperature control valve oil circuit is cut off through the backup oil circuit to achieve maintenance and replacement without stopping.
When the temperature control valve fails, ensure the constant lubricant temperature and ensure the normal operation of the compressor; when replacing or maintaining the temperature control valve, the operation is achieved without stopping, avoiding production interruptions.
Smart Images
Figure CN222457842U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lubricating oil temperature control, in particular to a lubricating oil temperature control device for a centrifugal compressor. Background Art
[0002] In the field of centrifugal compressors, temperature control valves are usually used to control oil temperature. The temperature of the lubricating oil entering the gearbox is controlled by mixing hot oil and cold oil from the outlet of the oil cooler. A movable temperature bag is set inside the temperature control valve. When the oil temperature is too high, the temperature bag will move to increase the flow of lubricating oil on the cold side and reduce the flow of lubricating oil on the hot side; when the temperature is too low, the temperature bag will move in the opposite direction to increase the flow of lubricating oil on the hot side and reduce the flow of lubricating oil on the cold side. The temperature control valve controls the flow of hot oil and cold oil by moving the temperature bag, and then controls the mixing ratio, thereby controlling the oil temperature.
[0003] However, there needs to be a gap inside the temperature control valve for the temperature bulb to move up and down. When the lubricating oil contains foreign particles, it is easy to cause the temperature bulb to get stuck, causing the temperature control valve to fail and affecting the operation of the compressor. At the same time, if the temperature control valve needs to be replaced, the compressor needs to be shut down, the lubricating oil needs to be drained, and the temperature control valve needs to be replaced, which delays the production progress. Utility Model Content
[0004] The utility model aims to provide a centrifugal compressor lubricating oil temperature control device, which can control the output lubricating oil temperature to be constant when the temperature control valve fails, ensure the normal operation of the compressor, and can realize the replacement or maintenance of the temperature control valve without stopping the machine.
[0005] In order to achieve the above-mentioned purpose, the utility model provides a centrifugal compressor lubricating oil temperature control device, comprising:
[0006] An oil pump, wherein a hot oil circuit is provided at the outlet of the oil pump;
[0007] An oil cooler is provided with a hot oil inlet, a cold oil outlet and a coolant inlet, the hot oil inlet is connected to the hot oil oil circuit, and a first solenoid valve is provided at the coolant inlet;
[0008] A temperature control valve, wherein the temperature control valve inlet and the hot oil circuit are connected to the cold oil outlet, the temperature control valve outlet is provided with an output oil circuit connected to a gear box, a second solenoid valve is provided between the temperature control valve inlet and the hot oil circuit, a third solenoid valve is provided between the temperature control valve inlet and the cold oil outlet, and a fourth solenoid valve and a temperature probe are provided on the output oil circuit;
[0009] The standby oil circuit is arranged between the cold oil outlet and the output oil circuit, and a fifth solenoid valve is arranged on the standby oil circuit.
[0010] Optionally, the first solenoid valve and the fourth solenoid valve are proportional valves capable of adjusting the degree of opening.
[0011] Optionally, the second solenoid valve, the third solenoid valve and the fifth solenoid valve are switch valves capable of opening and closing the valves.
[0012] Optionally, the fourth solenoid valve is close to the temperature control valve outlet, and the temperature probe is far away from the temperature control valve outlet.
[0013] Optionally, one end of the backup oil circuit is connected to the cold oil outlet, and the other end of the backup oil circuit is connected between the fourth solenoid valve and the temperature probe.
[0014] Optionally, an oil drain hole is provided at the lowest point of the pipeline at the temperature control valve.
[0015] Optionally, the temperature control valve is provided with a first inlet and a second inlet, the first inlet is connected to the hot oil circuit, the second inlet is connected to the cold oil outlet, the second solenoid valve is arranged at the first inlet, and the third solenoid valve is arranged at the second inlet.
[0016] Optionally, a coolant outlet is provided on the oil cooler.
[0017] The beneficial effects of the utility model are as follows: when the temperature control valve fails and the oil temperature probe detects that the temperature of the lubricating oil in the output oil circuit is too high, the spare oil circuit is opened by the fifth solenoid valve to directly supply cold oil to the output oil circuit, and the opening of the temperature control valve outlet is adjusted by the fourth solenoid valve to make the temperature of the lubricating oil output from the output oil circuit constant, thereby ensuring the normal operation of the compressor; when the temperature control valve is maintained or replaced, the spare oil circuit is opened by closing the fourth solenoid valve to cut off the temperature control valve oil circuit, so that hot oil directly enters the output oil circuit from the oil cooler and the spare oil circuit, and the temperature of the lubricating oil output from the output oil circuit is controlled by controlling the opening of the coolant inlet of the first solenoid valve, thereby achieving the purpose of replacing or maintaining the temperature control valve without stopping the machine.
[0018] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic structural diagram of a centrifugal compressor lubricating oil temperature control device shown in one embodiment of the utility model;
[0020] Figure 2 It is a schematic structural diagram of a temperature control valve of a centrifugal compressor lubricating oil temperature control device shown in one embodiment of the utility model;
[0021] In the figure: 1. oil pump; 11. hot oil circuit; 2. oil cooler; 21. hot oil inlet; 22. cold oil outlet; 23. coolant inlet; 231. first solenoid valve; 24. coolant outlet; 3. temperature control valve; 31. second solenoid valve; 32. third solenoid valve; 33. first inlet; 34. second inlet; 4. spare oil circuit; 41. fifth solenoid valve; 5. output oil circuit; 51. fourth solenoid valve; 52. temperature probe; 6. oil tank. DETAILED DESCRIPTION
[0022] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0024] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.
[0025] See also Figure 1A centrifugal compressor lubricating oil temperature control device shown in a preferred embodiment of the present application comprises an oil pump 1, an oil cooler 2, a temperature control valve 3, and a spare oil circuit 4. The outlet of the oil pump 1 is provided with a hot oil circuit 11. The oil cooler 2 is provided with a hot oil inlet 21, a cold oil outlet 22, and a coolant inlet 23. The hot oil inlet 21 is connected to the hot oil circuit 11, and a first solenoid valve 231 is provided at the coolant inlet 23. The inlet of the temperature control valve 3 is connected to the hot oil circuit 11 and the cold oil outlet 22. The outlet of the temperature control valve 3 is provided with an output oil circuit 5 connected to the gear box. A second solenoid valve 31 is provided between the inlet of the temperature control valve 3 and the hot oil circuit 11, a third solenoid valve 32 is provided between the inlet of the temperature control valve 3 and the cold oil outlet 22, and a fourth solenoid valve 51 and a temperature probe 52 are provided on the output oil circuit 5. The spare oil circuit 4 is provided between the cold oil outlet 22 and the output oil circuit 5, and a fifth solenoid valve 41 is provided on the spare oil circuit 4.
[0026] Since there needs to be a gap inside the temperature control valve 3 for the temperature bag to move up and down, when there are foreign particles in the lubricating oil, it is easy to cause the temperature bag to get stuck, causing the temperature control valve 3 to fail and affecting the operation of the compressor. At the same time, if the temperature control valve 3 needs to be replaced, the compressor needs to be shut down, the lubricating oil needs to be drained, and the temperature control valve 3 needs to be replaced, which delays the production progress.
[0027] Therefore, according to the scheme of the embodiment of the utility model, when the temperature control valve 3 fails and the oil temperature probe detects that the temperature of the lubricating oil in the output oil circuit 5 is too high, the spare oil circuit 4 is opened by the fifth solenoid valve 41 to directly supply cold oil to the output oil circuit 5, and the opening of the outlet of the temperature control valve 3 is adjusted by the fourth solenoid valve 51 to make the temperature of the lubricating oil output from the output oil circuit 5 constant, thereby ensuring the normal operation of the compressor; when the temperature control valve 3 is maintained or replaced, the spare oil circuit 4 is opened by closing the fourth solenoid valve 51 to cut off the oil circuit of the temperature control valve 3, so that the hot oil directly enters the output oil circuit 5 from the oil cooler 2 and the spare oil circuit 4, and the opening of the coolant inlet 23 is controlled by controlling the first solenoid valve 231 to control the temperature of the lubricating oil output from the output oil circuit 5, thereby achieving the purpose of replacing or maintaining the temperature control valve 3 without stopping the machine.
[0028] The following is a detailed description with specific embodiments:
[0029] See also Figure 1 The first solenoid valve 231 and the fourth solenoid valve 51 are proportional valves capable of adjusting the opening degree. The second solenoid valve 31, the third solenoid valve 32 and the fifth solenoid valve 41 are switch valves capable of opening and closing the valves.
[0030] It should be noted that, under normal circumstances, the first solenoid valve 231, the second solenoid valve 31 and the fourth solenoid valve 51 are always open, and the temperature control valve 3 operates normally to control the oil temperature. When the temperature control valve 3 fails and the oil temperature probe detects that the temperature of the lubricating oil in the output oil circuit 5 is too high, the temperature bag in the temperature control valve 3 is not completely blocked, and it can still mix the hot oil and the cold oil and output it to the output oil circuit 5. However, it is impossible to accurately control the mixing ratio of the hot oil and the cold oil, resulting in the temperature of the lubricating oil in the output oil circuit 5 being too high. Therefore, by opening the standby oil circuit 4, the cold oil is directly supplied to the output oil circuit 5 by bypassing the temperature control valve 3, and the flow of the mixed oil with too high temperature is adjusted by controlling the opening of the fourth solenoid valve 51, thereby controlling the temperature of the lubricating oil finally output. When maintaining or replacing the temperature control valve 3, the oil circuit of the temperature control valve 3 is cut off, so that the hot oil enters the output oil circuit 5 directly from the oil cooler 2 and the backup oil circuit 4. The opening of the coolant inlet 23 is controlled by controlling the first solenoid valve 231 to control the cooling effect of the hot oil output by the heat pump, thereby achieving the purpose of controlling the final output oil temperature.
[0031] Specifically, when the temperature control valve 3 is maintained or replaced, the fifth solenoid valve 41 is kept open, the fourth solenoid valve 51 is gradually closed, and the first solenoid valve 231 is adjusted in real time to control the temperature of the lubricating oil output to be stable until the fourth solenoid valve 51 is completely closed. Then the second solenoid valve 31 and the third solenoid valve 32 are closed to completely cut off the oil inlet to the hot side and the cold side of the temperature control valve 3, thereby isolating the oil circuit of the temperature control valve 3 for subsequent maintenance and replacement.
[0032] See also Figure 1 , the fourth solenoid valve 51 is close to the outlet of the temperature control valve 3, and the temperature probe 52 is far away from the outlet of the temperature control valve 3. One end of the standby oil circuit 4 is connected to the cold oil outlet 22, and the other end of the standby oil circuit 4 is connected between the fourth solenoid valve 51 and the temperature probe 52. The temperature probe 52 is set at the end of the oil circuit before entering the gear box, and the standby oil circuit 4 is set between the fourth solenoid valve 51 and the temperature probe 52, so that no matter whether the temperature is controlled by the temperature control valve 3, the standby oil circuit 4, or both, the temperature probe 52 can detect the final temperature control effect of the temperature control device, ensuring more accurate temperature monitoring.
[0033] The lowest point of the pipeline of the temperature control valve 3 is provided with an oil drain hole. After the oil circuit of the temperature control valve 3 is cut off and isolated, the residual oil in the temperature control valve 3 is drained through the oil drain hole before the temperature control valve 3 is maintained or replaced. The oil drain hole can be set at any point in the nearby oil circuit connected to the temperature control valve 3, as long as it is ensured to be the lowest point for natural oil draining, and the specific setting position is not limited here.
[0034] See also Figure 2The temperature control valve 3 is provided with a first inlet 33 and a second inlet 34. The first inlet 33 is connected to the hot oil circuit 11, and the second inlet 34 is connected to the cold oil outlet 22. The second solenoid valve 31 is provided at the first inlet 33, and the third solenoid valve 32 is provided at the second inlet 34. Figure 1 The oil cooler 2 is provided with a coolant outlet 24. The temperature control device also includes an oil tank 6 for supplying lubricating oil to the oil pump 1.
[0035] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0036] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.
Claims
1. A centrifugal compressor lubricating oil temperature control device, characterized in that: include: An oil pump, wherein a hot oil circuit is provided at the outlet of the oil pump; An oil cooler is provided with a hot oil inlet, a cold oil outlet and a coolant inlet, the hot oil inlet is connected to the hot oil oil circuit, and a first solenoid valve is provided at the coolant inlet; A temperature control valve, wherein the temperature control valve inlet and the hot oil circuit are connected to the cold oil outlet, the temperature control valve outlet is provided with an output oil circuit connected to a gear box, a second solenoid valve is provided between the temperature control valve inlet and the hot oil circuit, a third solenoid valve is provided between the temperature control valve inlet and the cold oil outlet, and a fourth solenoid valve and a temperature probe are provided on the output oil circuit; The standby oil circuit is arranged between the cold oil outlet and the output oil circuit, and a fifth solenoid valve is arranged on the standby oil circuit.
2. The centrifugal compressor lubricating oil temperature control device according to claim 1, characterized in that: The first solenoid valve and the fourth solenoid valve are proportional valves capable of adjusting the opening degree.
3. The centrifugal compressor lubricating oil temperature control device according to claim 2, characterized in that: The second solenoid valve, the third solenoid valve and the fifth solenoid valve are switch valves capable of opening and closing the valves.
4. The centrifugal compressor lubricating oil temperature control device according to claim 3, characterized in that: The fourth solenoid valve is close to the temperature control valve outlet, and the temperature probe is far away from the temperature control valve outlet.
5. The centrifugal compressor lubricating oil temperature control device according to claim 4, characterized in that: One end of the standby oil circuit is connected to the cold oil outlet, and the other end of the standby oil circuit is connected between the fourth solenoid valve and the temperature probe.
6. The centrifugal compressor lubricating oil temperature control device according to claim 5, characterized in that: An oil drain hole is arranged at the lowest point of the pipeline at the temperature control valve.
7. The centrifugal compressor lubricating oil temperature control device according to claim 1, characterized in that: The temperature control valve is provided with a first inlet and a second inlet, the first inlet is connected to the hot oil circuit, the second inlet is connected to the cold oil outlet, the second solenoid valve is arranged at the first inlet, and the third solenoid valve is arranged at the second inlet.
8. The centrifugal compressor lubricating oil temperature control device according to claim 1, characterized in that: The oil cooler is provided with a coolant outlet.