Oil cooling system and compressor

Abstract

The utility model provides an oil cooling system and a compressor. The oil cooling system comprises an oil cooler set, a cooling water pipe and a flow adjusting assembly. A temperature measuring piece is arranged at an oil outlet of the oil cooler set and used for obtaining the oil temperature of lubricating oil flowing through the oil outlet. The temperature measuring piece is electrically connected with a control system of the compressor; the cooling water pipe is connected with the oil cooler set and used for cooling lubricating oil in the oil cooler set. The flow adjusting assembly is arranged on the cooling water pipe and used for adjusting the circulation amount of cooling water in the cooling water pipe, and the flow adjusting assembly is electrically connected with a control system of the compressor. By controlling the circulation amount of the cooling water in the cooling water pipe, the temperature of lubricating oil output by the oil cooling system is effectively stabilized, and meanwhile the consumption amount of the cooling water is reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of compressor cooling systems, and in particular relates to an oil cooling system and a compressor. Background Art

[0002] A centrifugal compressor is a device that rotates at high speed through a rotor with an impeller, and usually uses sliding bearings to support the rotor. The high speed of the centrifugal compressor and the characteristics of the sliding bearing determine that the centrifugal compressor needs to be equipped with a lubricating oil station to provide lubricating oil to the compressor bearings, so as to achieve cooling and lubrication of the bearings when the centrifugal compressor rotor runs at high speed. Therefore, the lubricating oil station needs to be equipped with an oil tank, an oil pump group, an oil cooling system, an oil filter group, etc. The function of the oil cooling system is to cool the hot oil pumped out of the oil tank to meet the oil supply temperature requirements of the compressor bearings.

[0003] However, the technical problems existing in the oil cooling system of the existing lubricating oil station are:

[0004] The cooling water flow rate of the oil cooling system cannot be adjusted or is difficult to adjust, resulting in the cooling effect after the initial installation being affected by many factors such as the cooling water temperature, the oil temperature in the oil tank, and the ambient temperature. The lubricating oil temperature at the oil cooling system outlet cannot be adjusted in real time. Utility Model Content

[0005] Therefore, the technical problem to be solved by the present application is to provide an oil cooling system and a compressor, which can effectively stabilize the temperature of the lubricating oil output by the oil cooling system by controlling the cooling water flow rate in the cooling water pipe, while reducing the consumption of cooling water.

[0006] In order to solve the above problems, the present application provides an oil cooling system, which is applied to a compressor. The oil cooling system includes an oil cooler group, a cooling water pipe and a flow regulating component;

[0007] A temperature measuring element is provided at the oil outlet of the oil cooler group for obtaining the oil temperature of the lubricating oil flowing through the oil outlet; the temperature measuring element is electrically connected to the control system of the compressor;

[0008] The cooling water pipe is connected to the oil cooler group and is used to cool the lubricating oil in the oil cooler group; the flow regulating component is provided on the cooling water pipe and is used to regulate the flow rate of cooling water in the cooling water pipe, and the flow regulating component is electrically connected to the control system of the compressor.

[0009] Optionally, the cooling water pipe includes a cooling water inlet pipe and a cooling water outlet pipe, and the flow regulating component is arranged on the cooling water outlet pipe.

[0010] Optionally, a bypass pipe is provided on the cooling water outlet pipe, and two gate valves are provided on the cooling water outlet pipe. The two gate valves are respectively provided at both ends of the flow regulating component, and the bypass pipe is arranged in parallel with the flow regulating component and the gate valve. When the flow regulating component fails, the cooling water after cooling treatment is discharged through the bypass pipe.

[0011] Optionally, the oil cooler group includes an oil outlet main pipe, a first branch oil pipe, a second branch oil pipe and an oil inlet main pipe, the first ends of the first branch oil pipe and the second branch oil pipe are connected to the oil inlet main pipe, the second ends of the first branch oil pipe and the second branch oil pipe are connected to the oil outlet main pipe, and the temperature measuring component is installed on the oil outlet main pipe.

[0012] Optionally, temperature gauges are provided on both the oil outlet main pipe and the oil inlet main pipe.

[0013] Optionally, the oil cooler group also includes a first oil cooler, a second oil cooler, an oil inlet constant flow conversion valve and an oil outlet constant flow conversion valve, the first oil cooler is installed on the first branch oil pipe, the second oil cooler is installed on the second branch oil pipe, the oil inlet constant flow conversion valve is connected between the first ends of the first branch oil pipe and the second branch oil pipe, and the oil outlet constant flow conversion valve is connected between the second ends of the first branch oil pipe and the second branch oil pipe.

[0014] Optionally, the oil cooler group further includes a live oil circuit, which is disposed between the first oil cooler and the second oil cooler, and the live oil circuit is arranged in parallel with the oil inlet constant flow conversion valve.

[0015] Optionally, a live oil circuit gate valve and a throttling orifice plate are sequentially arranged on the live oil circuit along the flow direction.

[0016] Optionally, the cooling water inlet pipe includes two water inlet branch pipes and a water inlet main pipe, the first ends of the two water inlet branch pipes are connected to the water inlet main pipe, the second ends of the two water inlet branch pipes are respectively connected to the corresponding water inlets of the first oil cooler and the second oil cooler, and the two water inlet branch pipes are provided with cooling water inlet gate valves;

[0017] Optionally, the cooling water outlet pipe includes two water outlet branch pipes and a water outlet main pipe, the first ends of the two water outlet branch pipes are connected to the water outlet main pipe, the second ends of the two water outlet branch pipes are respectively connected to the corresponding water outlets of the first oil cooler and the second oil cooler, and the two water outlet branch pipes are respectively provided with cooling water safety valves and cooling water outlet gate valves in sequence along the flow direction.

[0018] Another aspect of the present application provides a compressor, comprising the oil cooling system as described above.

[0019] Beneficial Effects

[0020] The oil cooling system provided in the embodiment of the utility model is equipped with a temperature measuring component at the oil outlet of the oil cooler group, and the lubricating oil temperature data of the oil outlet is detected by the temperature measuring component and transmitted to the control system of the compressor; a flow regulating component is installed on the cooling water outlet pipe, and the command from the control system of the compressor is received, so as to realize the controllable regulation of the cooling water flow in the cooling water pipe, effectively stabilize the lubricating oil temperature output by the oil cooling system, and reduce the consumption of cooling water; and the compressor control system adopts automatic control of the flow regulating component, so as to remotely control the lubricating oil temperature output by the oil cooling system, without the need for on-site adjustment by the operator, thereby reducing the work intensity of the operator and also reducing the human resource cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of the oil cooling system of the lubricating oil station for the centrifugal compressor unit according to an embodiment of the present application.

[0022] The reference numerals are as follows:

[0023] 1. Oil inlet main pipe; 2. Thermometer; 3. Oil inlet constant flow conversion valve; 4. Throttle plate; 5. Live oil circuit gate valve; 6. Oil cooler group; 7. Cooling water safety valve; 801, Cooling water inlet gate valve; 802, Cooling water outlet gate valve; 9. Temperature measuring component; 10. Flow regulating component; 11. Compressor control system; 12. Stop valve; 13. Cooling water inlet pipe; 14. Cooling water outlet pipe; 15. Oil return branch pipe. DETAILED DESCRIPTION

[0024] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0027] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0028] See also Figure 1 As shown, according to an embodiment of the present application, an oil cooling system is provided, which is applied to a compressor, and includes an oil cooler group 6, a cooling water pipe and a flow regulating component 10; a temperature measuring component 9 is provided at the oil outlet of the oil cooler group 6, for obtaining the oil temperature of the lubricating oil flowing through the oil outlet; the temperature measuring component 9 is electrically connected to a control system 11 of the compressor; the cooling water pipe is connected to the oil cooler group 6, for cooling the lubricating oil in the oil cooler group 6; the flow regulating component 10 is provided on the cooling water pipe, for regulating the flow rate of cooling water in the cooling water pipe, and the flow regulating component 10 is electrically connected to the control system 11 of the compressor.

[0029] The cooling water pipe includes a cooling water inlet pipe 13 and a cooling water outlet pipe 14, and the flow regulating assembly 10 is arranged on the cooling water outlet pipe 14. The cooling water inlet pipe 13 and the cooling water outlet pipe 14 are both provided with a thermometer for displaying the cooling water inlet temperature and the outlet temperature after cooling.

[0030] A temperature measuring component 9 is installed at the oil outlet of the oil cooler group 6. The lubricating oil temperature data of the oil outlet is detected by the temperature measuring component 9 and transmitted to the control system 11 of the compressor. A flow regulating component 10 is installed on the cooling water outlet pipe, and receives instructions from the control system 11 of the compressor, thereby realizing controllable regulation of the cooling water flow rate in the cooling water pipe, effectively stabilizing the lubricating oil temperature output by the oil cooling system, and reducing the consumption of cooling water, thereby playing a role in energy conservation and emission reduction; only the oil temperature set value needs to be input through the control system of the compressor, and the flow regulating component 10 is automatically controlled by the control system 11 of the compressor, so that the lubricating oil temperature output by the oil cooling system can be remotely controlled, thereby reducing the number of on-site valve operations, eliminating the need for on-site adjustments by operators, reducing the work intensity of operators, and also reducing human resource costs.

[0031] Among them, the temperature measuring component 9 is a temperature sensor, which includes a measuring end and a transmission end. The temperature sensor is installed at the oil outlet of the oil cooler group 6 through the measuring end, and is electrically connected to the signal input end of the compressor control system 11 through the transmission end, so that the oil temperature of the lubricating oil flowing through the oil outlet is obtained and fed back to the compressor control system 11 in real time.

[0032] In other embodiments, the temperature measuring element is not limited to the contact type or the non-contact type, as long as it can realize automatic temperature measurement and feedback data.

[0033] Among them, the flow regulating component 10 is a temperature control valve, which includes an actuator end and a receiving end. The temperature control valve is installed on the cooling water pipe through the actuator end, and the receiving end of the temperature control valve is connected to the signal output end of the compressor control system 11. The temperature control valve is controlled by the compressor control system 11 to adjust the opening, thereby realizing the control of the cooling water flow rate in the cooling water pipe.

[0034] The control system 11 of the compressor sends the temperature control valve opening adjustment instruction to the receiving end of the temperature control valve, and then adjusts the opening by the execution end to realize the control of the cooling water flow rate in the cooling water pipe.

[0035] Specifically: when the measuring end of the temperature sensor detects that the oil temperature at the oil outlet of the oil cooler group 6 is higher than the set value, the opening increase instruction is sent to the receiving end of the temperature control valve through the compressor group control system 11, and then the opening is increased through the execution end to increase the circulation of cooling water in the cooling water pipe, so as to stabilize the oil temperature of the lubricating oil at the set value.

[0036] When the measuring end of the temperature sensor detects that the oil temperature at the oil outlet of the oil cooler group 6 is lower than the set value, the opening reduction instruction is sent to the receiving end of the temperature control valve through the compressor group control system 11, and then the opening is reduced through the execution end to reduce the circulation of cooling water in the cooling water pipe, so as to stabilize the oil temperature of the lubricating oil at the set value.

[0037] In another embodiment, a bypass pipe is provided on the cooling water outlet pipe 14, and two gate valves are provided on the cooling water outlet pipe 14. The two gate valves are respectively provided at both ends of the flow regulating component 10, and the bypass pipe is arranged in parallel with the flow regulating component 10 and the gate valve. When the flow regulating component 10 fails, the cooling water after the cooling treatment is discharged through the bypass pipe.

[0038] Among them, two gate valves are arranged on the cooling water pipe 14. Based on the flow direction, one gate valve is located at the rear end of the flow direction, and the other gate valve is located at the front end of the flow direction. Figure 1 As shown, the left end of the flow regulating component 10 is located at the rear end in the flow direction, and the right end of the flow regulating component 10 is located at the front end in the flow direction.

[0039] A stop valve 12 is provided on the bypass pipe.

[0040] When the flow regulating assembly 10 works normally, the stop valve 12 is in a normally closed state, and the gate valves at the left and right ends of the flow regulating assembly 10 are in a normally open state. When the flow regulating assembly 10 works abnormally, the stop valve 12 on the bypass pipe is opened, and the two gate valves are closed, so that the cooling water after cooling flows out through the bypass pipe, and the abnormal flow regulating assembly 10 is replaced online to avoid downtime for maintenance.

[0041] In another embodiment, the oil cooler group 6 includes an oil outlet main pipe, a first branch oil pipe, a second branch oil pipe and an oil inlet main pipe 1, the first ends of the first branch oil pipe and the second branch oil pipe are connected to the oil inlet main pipe 1, the second ends of the first branch oil pipe and the second branch oil pipe are connected to the oil outlet main pipe, and a temperature measuring component 9 is installed on the oil outlet main pipe.

[0042] The oil inlet pipe 1 and the oil outlet pipe are both made of stainless steel pipes; the temperature measuring element 9 is a temperature sensor for feeding back the detected oil temperature of the lubricating oil in the oil outlet pipe to the control system 11 of the compressor.

[0043] In another embodiment, temperature gauges are provided on both the oil outlet pipe and the oil inlet pipe.

[0044] Among them, a temperature measuring element 9 is also provided on the oil outlet main pipe, and the specific positional relationship between the temperature measuring element 9 and the temperature meter is as follows: the temperature meter and the temperature measuring element 9 are arranged in sequence along the flow direction of the fluid in the oil outlet main pipe. The temperature meter is used to display the oil temperature of the lubricating oil at the oil outlet of the oil cooler group 6, that is, to further verify the accuracy of the oil temperature value of the lubricating oil at the oil outlet measured by the temperature measuring element 9.

[0045] In another embodiment, the oil cooler group 6 also includes a first oil cooler, a second oil cooler, an oil inlet constant flow conversion valve 3 and an oil outlet constant flow conversion valve, the first oil cooler is installed on the first branch oil pipe, the second oil cooler is installed on the second branch oil pipe, the oil inlet constant flow conversion valve 3 is connected between the first ends of the first branch oil pipe and the second branch oil pipe and is simultaneously connected to the oil inlet main pipe 1, and the oil outlet constant flow conversion valve is connected between the second ends of the first branch oil pipe and the second branch oil pipe and is simultaneously connected to the oil outlet main pipe.

[0046] The oil return ports of the first oil cooler and the second oil cooler are respectively connected to the oil return main pipe of the oil tank through the oil return branch pipe 15, and an oil return stop valve is installed on the oil return branch pipe 15; an oil return throttling orifice plate is installed on the oil return main pipe.

[0047] In this embodiment, the first oil cooler and the second oil cooler are shell and tube coolers or plate coolers, and both are equipped with condensate discharge and exhaust valves. In the working state, only one oil cooler is needed to avoid damage to one of the oil coolers, resulting in downtime for maintenance. In other embodiments, it is not limited to setting only two oil coolers, and the number of oil coolers can be adjusted according to specific working conditions.

[0048] By setting the oil inlet constant flow conversion valve 3 and the oil outlet constant flow conversion valve, free switching between the first oil cooler and the second oil cooler is achieved, ensuring the continuity of the downstream lubricating oil volume and avoiding shutdown for maintenance.

[0049] In another embodiment, the oil cooler group further includes a live oil circuit, which is disposed between the first oil cooler and the second oil cooler, and the live oil circuit is arranged in parallel with the oil inlet constant flow conversion valve 3 .

[0050] Specifically: both ends of the live oil circuit are respectively connected to the first branch oil pipe and the first end of the second branch oil pipe, and both ends of the live oil circuit are located on both sides of the oil inlet constant flow conversion valve 3 .

[0051] The uncooled lubricating oil flowing into the first branch oil pipe from the front end can flow partly through the live oil circuit to the second oil cooler before the first oil cooler is put into use. At this time, the return oil stop valve on the second oil cooler is in an open state, and the lubricating oil entering the second oil cooler flows back to the oil tank through the return oil stop valve; thereby making the oil temperature of the lubricating oil in the second oil cooler consistent with the oil temperature of the lubricating oil before cooling, ensuring that the lubricating oil temperature is not affected by the environment when used for the first time, that is, ensuring the stability of the lubricating oil temperature.

[0052] In another embodiment, the live oil circuit gate valve 5 and the throttling orifice plate 4 are sequentially arranged along the flow direction on the live oil circuit.

[0053] When the oil cooling system operates normally, the live oil circuit gate valve 5 is in an open state, allowing the lubricating oil before cooling to enter the second oil cooler through the live oil circuit gate valve 5; when the first oil cooler fails, the live oil circuit gate valve 5 is in a closed state, and the throttling orifice plate 4 plays a flow limiting role to avoid affecting the lubricating oil supply to the first oil cooler.

[0054] In another embodiment, the cooling water inlet pipe 13 includes two water inlet branch pipes and a water inlet main pipe, the first ends of the two water inlet branch pipes are connected to the water inlet main pipe, the second ends of the two water inlet branch pipes are respectively connected to the water inlets of the corresponding first oil cooler and the second oil cooler, and the two water inlet branch pipes are provided with cooling water inlet gate valves 801;

[0055] The cooling water outlet pipe 14 includes two outlet branch pipes and an outlet main pipe. The first ends of the two outlet branch pipes are connected to the outlet main pipe, and the second ends of the two outlet branch pipes are respectively connected to the corresponding outlets of the first oil cooler and the second oil cooler. The two outlet branch pipes are respectively provided with a cooling water safety valve 7 and a cooling water outlet gate valve 802 in sequence along the flow direction.

[0056] The number of the water inlet branch pipes and the water outlet branch pipes is the same, and at the same time, the number of the two and the oil cooler is also the same.

[0057] The arrangement of the cooling water inlet gate valve 801 and the cooling water outlet gate valve 802 is used to cut off the cooling water when the oil cooler is being repaired.

[0058] The arrangement of the cooling water safety valve 7 can prevent the cooling water pressure from being too high, thus protecting the oil cooler.

[0059] Another aspect of the present application provides a compressor, comprising the oil cooling system as described above.

[0060] An oil cooler system and a compressor provided in the embodiment of the utility model are provided. A temperature measuring component 9 is installed at the oil outlet of the oil cooler group 6. The lubricating oil temperature data of the oil outlet is detected by the temperature measuring component 9 and transmitted to the control system 11 of the compressor. A flow regulating component 10 is installed on the cooling water outlet pipe, and the command from the control system 11 of the compressor is received, so as to realize the controllable regulation of the cooling water flow in the cooling water pipe, effectively stabilize the lubricating oil temperature output by the oil cooling system, and reduce the consumption of cooling water at the same time, so as to play the role of energy saving and emission reduction; only the oil temperature set value needs to be input through the control system of the compressor, and the flow regulating component 10 is automatically controlled by the control system 11 of the compressor, so as to remotely control the lubricating oil temperature output by the oil cooling system, reduce the number of on-site valve operations, and do not need on-site adjustments by operators, thereby reducing the work intensity of operators and also reducing human resource costs.

[0061] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0062] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. An oil cooling system, characterized in that: Applied to a compressor, the oil cooling system comprises: Oil cooler assembly (6), cooling water pipe and flow regulating assembly (10); A temperature measuring element (9) is provided at the oil outlet of the oil cooler group (6) for obtaining the temperature of the lubricating oil flowing through the oil outlet; the temperature measuring element (9) is electrically connected to the control system (11) of the compressor; The cooling water pipe is connected to the oil cooler group (6) and is used to cool the lubricating oil in the oil cooler group (6); the flow regulating component (10) is provided on the cooling water pipe and is used to regulate the flow rate of cooling water in the cooling water pipe; the flow regulating component (10) is electrically connected to the control system (11) of the compressor.

2. An oil cooling system according to claim 1, characterized in that: The cooling water pipe comprises a cooling water inlet pipe (13) and a cooling water outlet pipe (14), and the flow regulating component (10) is arranged on the cooling water outlet pipe (14).

3. An oil cooling system according to claim 2, characterized in that: A bypass pipe is provided on the cooling water outlet pipe (14), and two gate valves are provided on the cooling water outlet pipe (14). The two gate valves are respectively provided at two ends of the flow regulating component (10), and the bypass pipe is arranged in parallel with the flow regulating component (10) and the gate valve. When the flow regulating component (10) fails, the cooling water after the cooling process is discharged through the bypass pipe.

4. An oil cooling system according to claim 2, characterized in that: The oil cooler group (6) comprises an oil outlet main pipe, a first branch oil pipe, a second branch oil pipe and an oil inlet main pipe (1), the first ends of the first branch oil pipe and the second branch oil pipe are both connected to the oil inlet main pipe (1), the second ends of the first branch oil pipe and the second branch oil pipe are both connected to the oil outlet main pipe, and the temperature measuring component (9) is installed on the oil outlet main pipe.

5. An oil cooling system according to claim 4, characterized in that: The oil outlet main pipe and the oil inlet main pipe are both provided with temperature gauges.

6. An oil cooling system according to claim 4, characterized in that: The oil cooler group (6) also includes a first oil cooler, a second oil cooler, an oil inlet constant flow conversion valve (3) and an oil outlet constant flow conversion valve, wherein the first oil cooler is installed on the first branch oil pipe, the second oil cooler is installed on the second branch oil pipe, the oil inlet constant flow conversion valve (3) is connected between the first ends of the first branch oil pipe and the second branch oil pipe, and the oil outlet constant flow conversion valve is connected between the second ends of the first branch oil pipe and the second branch oil pipe.

7. An oil cooling system according to claim 6, characterized in that: The oil cooler group further comprises a live oil circuit, which is arranged between the first oil cooler and the second oil cooler, and the live oil circuit is arranged in parallel with the oil inlet constant flow conversion valve (3).

8. An oil cooling system according to claim 7, characterized in that: The live oil circuit is provided with a live oil circuit gate valve (5) and a throttling orifice plate (4) in sequence along the flow direction.

9. An oil cooling system according to claim 6, characterized in that: The cooling water inlet pipe (13) comprises two water inlet branch pipes and a water inlet main pipe, the first ends of the two water inlet branch pipes are connected to the water inlet main pipe, the second ends of the two water inlet branch pipes are respectively connected to the corresponding water inlets of the first oil cooler and the second oil cooler, and the two water inlet branch pipes are provided with cooling water inlet gate valves (801); The cooling water outlet pipe (14) comprises two outlet branch pipes and an outlet main pipe, the first ends of the two outlet branch pipes are connected to the outlet main pipe, the second ends of the two outlet branch pipes are respectively connected to the corresponding outlet ports of the first oil cooler and the second oil cooler, and the two outlet branch pipes are respectively provided with a cooling water safety valve (7) and a cooling water outlet gate valve (802) in sequence along the flow direction.

10. A compressor, characterized in that: An oil cooling system comprising the oil cooling system according to any one of claims 1 to 9.

Images