Fan blade amplitude variation system, operation machine and heat dissipation module of fan blade amplitude variation system
By using a closed-loop pump-driven oil replenishment pump and a variable pressure unit to drive the fan blade amplitude system in the operating machinery, the problems of high cost and heat generation of hydraulic systems are solved, and the stability of fan angle adjustment and low-cost operation of the system are achieved.
Patent Information
- Application Number
- CN202423194323.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-12-23
AI Technical Summary
In existing operating machinery, hydraulic systems are costly and prone to overheating when adjusting the fan blade angle. Furthermore, setting up a separate low-pressure control circuit or introducing oil source control into the working system can lead to system complexity and overheating issues.
The system employs a fan blade luffing system, utilizing the make-up pump of a closed-loop pump as a power source. The fluid pressure is amplified through a pressure transformer unit to drive the fan blade luffing cylinder. No additional pump set is required, and the system is closed to maintain fluid cleanliness.
It reduces the number of hydraulic components and system costs, ensures the stability and independence of fan operation, avoids system overheating, and maintains fluid cleanliness.
Smart Images
Figure CN223511211U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to mechanical heat dissipation technical field, concretely relates to a fan blade amplitude system, the heat dissipation module of operating machine and operating machine. BACKGROUND
[0002] The working environment of agricultural machinery and engineering machinery is dusty, and the inlet of the radiator shroud can adsorb a large amount of sundries or dust after long time work, which reduces the air intake and affects heat dissipation. The prior art generally changes the fan blade angle to realize air suction to air blowing, and the sundries adsorbed on the radiator shroud are cleaned to restore the air intake. In order to realize the change of the fan blade angle, the hydraulic system in the existing operating machine separately sets a low-pressure control circuit or introduces the working system oil source to control through pressure reduction. The separately set low-pressure control circuit needs to additionally set a separate hydraulic pump, which increases the system cost and limits the installation space. The introduction of the working system oil source to control through pressure reduction can cause serious system heating. SUMMARY
[0003] In view of the above defects or deficiencies, the utility model provides a fan blade amplitude system, a heat dissipation module of operating machine and operating machine, which aims to solve the technical problems of high cost or easy system heating of the hydraulic system in the existing operating machine when adjusting the blade angle of the equipped heat dissipation fan.
[0004] To achieve the above purpose, the utility model provides a fan blade amplitude system, which comprises a power source, a pressure changing unit and a fan blade amplitude cylinder. The power source is a makeup pump of a closed pump of the operating machine using the fan blade amplitude system; the pressure changing unit comprises a pressure input cavity, a pressure output cavity and a pressure transmission component, the pressure input cavity is connected with the makeup pump, the pressure output cavity is provided with a fluid for outputting power, a communication channel is arranged between the pressure input cavity and the pressure output cavity, the pressure transmission component is movably arranged in the communication channel and is used for transmitting pressure between the pressure input cavity and the pressure output cavity; the fan blade amplitude cylinder is used for driving the fan body to change the angle of the fan blade, and the fan blade amplitude cylinder is connected with the pressure output cavity; wherein the sectional area of the pressure input cavity is larger than the sectional area of the pressure output cavity.
[0005] In the embodiment of the utility model, the pressure changing unit is a booster cylinder, the pressure transmission component is a piston of the booster cylinder, the pressure input cavity is a large cavity of the booster cylinder, and the pressure output cavity is a small cavity of the booster cylinder.
[0006] In the embodiment of the utility model, the reversing valve is arranged between the oil supplement pump and the pressure input cavity, and the reversing valve is used for selectively guiding the fluid output by the oil supplement pump to the pressure input cavity or for pressure relief of the pressure input cavity.
[0007] In the embodiment of the utility model, the elastic reset member includes a first spring acting on one side of the piston of the booster cylinder towards the small cavity of the booster cylinder.
[0008] In the embodiment of the utility model, the rodless cavity of the fan amplitude cylinder is connected with the pressure output cavity, and the elastic reset member can include a second spring acting on one side of the piston rod of the fan amplitude cylinder towards the rod cavity of the fan amplitude cylinder.
[0009] In the embodiment of the utility model, one side of the reversing valve is provided with a fluid inlet and a fluid outlet, and the other side is provided with a working connection port, the fluid inlet and the fluid outlet are connected with a power source and a pressure relief pipeline respectively, and the working connection port is connected with the pressure input cavity.
[0010] In the embodiment of the utility model, the reversing valve is an electromagnetic reversing valve.
[0011] In the embodiment of the utility model, the pressure output cavity is hydraulically connected or pneumatically connected with the fan amplitude cylinder.
[0012] To achieve the above object, the utility model also provides a heat dissipation module of working machine, wherein the heat dissipation module of working machine comprises the fan amplitude system according to the above.
[0013] To achieve the above object, the utility model also provides a working machine, wherein the working machine comprises a hydraulic system in addition to the heat dissipation module of working machine according to the above, and the hydraulic system comprises a closed pump, and the closed pump is provided with an oil supplement pump.
[0014] Through the above technical scheme, the fan amplitude system provided by the utility model embodiment has the following beneficial effects:
[0015] Firstly, the oil supplement pump of the closed pump is the existing power source in the working machine, and the system drives the angle of the fan by means of the existing power source, without adding an additional pump set, thereby reducing the number of hydraulic elements and system assembly cost.
[0016] Secondly, the pressure output by the oil supplement pump is 20%-30% of the closed pump, if the oil supplement pump is used to directly supply oil to the fan amplitude cylinder, the pressure may be too low to drive the fan amplitude cylinder to act. Therefore, the utility model also sets the pressure changing unit between the power source and the fan amplitude cylinder, can realize the amplification of the fluid pressure from the input end to the execution end, so as to ensure that the fan amplitude cylinder has enough pressure to act normally, and there is no throttling phenomenon in the process of pressure amplification, thereby reducing the system heating.
[0017] Thirdly, the pressure of the oil supplement pump of the closed pump is very stable, the oil supplement pump of the closed pump is used as the power source, the action of the fan amplitude cylinder can be ensured not to be affected by the load change of other execution mechanisms, and the independence and stability of the fan operation are ensured.
[0018] Fourthly, the fan amplitude system is a closed system, the hydraulic oil in the fan amplitude system and the fluid between the pressure output cavity and the fan amplitude cylinder are not exchanged with the outside, when the working machine works for a long time in a harsh environment, the cleanliness of the fluid in the fan amplitude system can be ensured.
[0019] Other features and advantages of the utility model will be described in detail in the following specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS
[0020] The drawings are used to provide the understanding of the utility model, and constitute a part of the specification, and are used together with the following specific embodiment to explain the utility model, but do not constitute the limitation to the utility model. In the drawings:
[0021] Figure 1 It is the hydraulic connection principle diagram of the fan amplitude system with the closed pump according to the utility model embodiment;
[0022] Figure 2 It is the hydraulic connection principle diagram of the first kind of embodiment of the fan amplitude system after omitting the closed pump according to the utility model embodiment;
[0023] Figure 3 It is the hydraulic connection principle diagram of the second kind of embodiment of the fan amplitude system after omitting the closed pump according to the utility model embodiment.
[0024] EXPLANATION OF REFERENCE NUMERALS
[0025] 1, oil supplement pump; 2, pressure changing unit; 21, pressure input cavity; 211, first piston; 22, pressure output cavity; 221, second piston; 23, pressure transmission component; 24, elastic reset piece; 241, first spring; 242, second spring; 25, intermediate pipeline; 3, fan amplitude cylinder; 4, reversing valve; P, fluid inlet; T, fluid outlet; a, working connection port. DETAILED DESCRIPTION
[0026] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.
[0027] The fan blade amplitude-changing system of this utility model is described below with reference to the accompanying drawings.
[0028] This utility model provides a fan blade amplitude variation system, such as Figure 1 , Figure 2 and Figure 3 As shown, the blade luffing system includes a power source, a transformer unit 2, and a blade luffing cylinder 3.
[0029] The power source is the oil replenishment pump 1 of the closed-loop pump of the operating machinery that uses the fan blade luffing system. The closed-loop pump refers to the hydraulic pump in the closed-loop oil circuit system of the operating machinery.
[0030] The transformer unit 2 includes a pressure input chamber 21, a pressure output chamber 22, and a pressure transmission component 23. The pressure input chamber 21 is connected to the oil pump 1. The pressure output chamber 22 contains fluid for outputting power. A connecting channel is provided between the pressure input chamber 21 and the pressure output chamber 22. The pressure transmission component 23 is movably disposed within the connecting channel and is used to transmit pressure between the pressure input chamber 21 and the pressure output chamber 22. The cross-sectional area of the pressure input chamber 21 is larger than that of the pressure output chamber 22.
[0031] The blade amplitude-changing cylinder 3 is used to drive the fan blades of the fan body to change the angle. The blade amplitude-changing cylinder 3 is connected to the pressure output chamber 22.
[0032] The fan blade amplitude-changing system provided in this embodiment of the present invention has the following beneficial effects:
[0033] Firstly, the replenishing pump 1 of the closed-loop pump is an existing power source in the operating machinery. This system uses the existing power source to drive the angle of the fan, eliminating the need to add an extra pump set, thus reducing the number of hydraulic components and the system assembly cost.
[0034] Secondly, the output pressure of the supplementary oil pump 1 is 20%-30% of that of the closed-loop pump. If the supplementary oil pump 1 is used to directly supply oil to the fan blade luffing cylinder 3, the pressure may be too low to drive the fan blade luffing cylinder 3 to operate. Therefore, this utility model also sets up a pressure transformer unit 2 between the power source and the fan blade luffing cylinder 3, which can amplify the fluid pressure from the input end to the execution end, thereby ensuring that the fan blade luffing cylinder 3 has sufficient pressure to operate normally, and there is no throttling phenomenon during the pressure amplification process, thereby reducing system heat generation.
[0035] Thirdly, the pressure of the oil replenishment pump 1 of the closed-loop pump is very stable. Using the oil replenishment pump 1 of the closed-loop pump as the power source can ensure that the action of the fan blade amplitude cylinder 3 is not affected by the load changes of other actuators, thus ensuring the independence and stability of the fan operation.
[0036] Fourth, the blade luffing system is a closed system. The hydraulic oil in the blade luffing system and the fluid between the pressure output chamber 22 and the blade luffing cylinder 3 are not exchanged with the outside world. When the working machinery works in a harsh environment for a long time, the cleanliness of the fluid in the blade luffing system can be guaranteed.
[0037] like Figure 2 and Figure 3 As shown, in this invention, the pressure amplification principle of the transformer unit 2 is as follows: the fluid output from the replenishing pump 1 enters the pressure input chamber 21 and applies a force towards the pressure output chamber 22 to the pressure transmission component 23, thereby pushing the fluid in the pressure output chamber 22 towards the fan blade luffing cylinder 3. According to the common-sense equilibrium formula P1×S1=P2×S2, the pressure of the fluid supplied by the replenishing pump 1 to the pressure input chamber 21 is defined as P1, the cross-sectional area of the pressure input chamber 21 is S1, and the cross-sectional area of the pressure output chamber 22 is S2. Since S1>S2, the corresponding pressure P2 (or the pressure of the fluid in the pressure output chamber 22) output by the pressure output chamber 22 to the fan blade luffing cylinder 3 will be greater than P1. That is, by setting the cross-sectional area of the pressure input chamber 21 of the transformer unit 2 to be greater than the cross-sectional area of the pressure output chamber 22, pressure amplification of the fluid from the input end to the execution end can be achieved.
[0038] like Figure 1 and Figure 2 As shown in the embodiment of this utility model, the pressure transformer unit 2 can be a booster cylinder. When the pressure transformer unit 2 is a booster cylinder, the pressure transmission component 23 is the piston of the booster cylinder, the pressure input chamber 21 is the large chamber of the booster cylinder, and the pressure output chamber 22 is the small chamber of the booster cylinder. The large chamber refers to the working chamber with the larger cross-sectional area among the two working chambers of the booster cylinder; the small chamber refers to the working chamber with the smaller cross-sectional area. When the oil pump 1 inputs pressurized oil into the large chamber, it pushes the piston towards the small chamber. The movement of the piston squeezes out the fluid in the small chamber and transports it to the fan blade amplitude-changing cylinder 3. Since the cross-sectional area of the large chamber is larger than that of the small chamber, according to the above balance formula, the pressure in the small chamber will be higher than the pressure in the large chamber, thus amplifying the fluid output pressure. Of course, in some application scenarios, the small chamber can be set as the pressure input chamber 21, and the large chamber can be set as the pressure output chamber 22, realizing a locking pin for the fluid output pressure.
[0039] In embodiments of this utility model, the power source can also be a gas source.
[0040] In embodiments of this utility model, the transformer unit 2 can have other arrangements besides the hydraulic cylinder arrangement. For example, in... Figure 3 In another embodiment shown, the pressure input chamber 21 and the pressure output chamber 22 are separated from each other and connected by an intermediate pipe 25. That is, the intermediate pipe 25, part of the pressure input chamber 21, and part of the pressure output chamber 22 together form a connecting channel. The pressure transmission component 23 may include a first piston 211 disposed in the pressure input chamber 21, a second piston 221 disposed in the pressure output chamber 22, and liquid or gas disposed in the intermediate pipe 25. When the first piston 211 moves toward the intermediate pipe 25, the liquid or gas in the intermediate pipe 25 transmits pressure to the second piston 221, thereby pushing the fluid in the pressure output chamber 22 to be discharged.
[0041] like Figure 1 and Figure 2 As shown in the embodiment of this utility model, a reversing valve 4 is also provided between the replenishing pump 1 and the pressure input chamber 21. The reversing valve 4 is used to selectively guide the hydraulic oil output by the replenishing pump 1 to the pressure input chamber 21, or to selectively supply the pressure input chamber 21 with depressurized return oil. The transformer unit 2 also includes an elastic reset member 24. The elastic reset member 24 acts on the fan blade amplitude cylinder 3 or the pressure transmission component 23. The elastic reset member 24 is used to apply a force to the pressure transmission component 23 in the opposite direction to the driving force when the fluid is input into the pressure input chamber 21.
[0042] like Figure 2 As shown, in an embodiment of this utility model, the elastic reset member 24 may include a first spring 241 acting on the side of the piston of the booster cylinder facing the small cavity of the booster cylinder.
[0043] like Figure 2 As shown, in an embodiment of this utility model, the rodless chamber of the fan blade luffing cylinder 3 is connected to the pressure output chamber 22, and the elastic reset member 24 may include a second spring 242 acting on the side of the piston rod of the fan blade luffing cylinder 3 facing the rod chamber of the fan blade luffing cylinder 3.
[0044] When the pressure input chamber 21 is depressurized, the fan blade amplitude cylinder 3 and the pressure transmission component 23 can be automatically reset by the elastic reset component 24.
[0045] like Figure 2As shown in the embodiment of this utility model, the reversing valve 4 has a fluid inlet P and a fluid outlet T on one side, and a working connection port a on the other side. The fluid inlet P and the fluid outlet T are respectively connected to the oil replenishment pump 1 and the pressure relief pipeline. The working connection port a is connected to the pressure input chamber 21. The reversing valve 4 has a drive valve position and a pressure relief valve position. The drive valve position is configured so that the fluid inlet P is connected to the working connection port a, and the pressure relief valve position is configured so that the fluid outlet T is connected to the working connection port a. Through the reversing valve 4, the fluid input and pressure relief of the pressure input chamber 21 are controlled.
[0046] like Figure 2 and Figure 3 As shown, in an embodiment of this invention, the pressure output chamber 22 and the fan blade luffing cylinder 3 are connected by hydraulic or pneumatic means. That is, the fluid medium in the pipe between the pressure output chamber 22 and the fan blade luffing cylinder 3 can be liquid or gas.
[0047] To achieve the above objectives, this utility model also provides a heat dissipation module for operating machinery. The heat dissipation module includes the blade amplitude adjustment system described above, and also includes a fan body. By driving the blade amplitude adjustment cylinder 3, the angle of the fan blades can be changed, thereby adjusting the airflow and blowing direction of the fan body. Since the heat dissipation module adopts all the technical solutions of the above embodiments, it at least has the beneficial effects brought by the above embodiments, and will not be repeated here.
[0048] To achieve the above objectives, this utility model also provides a working machine, which, in addition to the heat dissipation module described above, also includes a hydraulic system. The hydraulic system includes a closed-loop pump with a replenishing pump. The working machine can be engineering machinery such as cranes and excavators, or agricultural machinery such as corn harvesters and rice harvesters. Since the working machine adopts all the technical solutions of the above embodiments, it at least has the beneficial effects brought about by the above embodiments, and will not be repeated here.
[0049] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0050] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0051] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0052] Although embodiments of the present invention have been described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A fan blade amplitude adjustment system, characterized in that, include: The power source is a replenishment pump (1) of a closed-loop pump of the working machinery using the aforementioned blade luffing system; The transformer unit (2) includes a pressure input chamber (21), a pressure output chamber (22), and a pressure transmission component (23). The pressure input chamber (21) is connected to the oil pump (1). The pressure output chamber (22) contains fluid for outputting power. A communication channel is provided between the pressure input chamber (21) and the pressure output chamber (22). The pressure transmission component (23) is movably disposed in the communication channel and is used to transmit pressure between the pressure input chamber (21) and the pressure output chamber (22). The fan blade amplitude cylinder (3) is used to drive the fan blades of the fan body to change the angle. The fan blade amplitude cylinder (3) is connected to the pressure output chamber (22). The cross-sectional area of the pressure input chamber (21) is larger than the cross-sectional area of the pressure output chamber (22).
2. The fan blade amplitude variation system according to claim 1, characterized in that, The pressure transformer unit (2) is a booster cylinder, the pressure transmission component (23) is the piston of the booster cylinder, the pressure input chamber (21) is the large chamber of the booster cylinder, and the pressure output chamber (22) is the small chamber of the booster cylinder.
3. The fan blade amplitude variation system according to claim 2, characterized in that, A reversing valve (4) is also provided between the replenishing pump (1) and the pressure input chamber (21). The reversing valve (4) is used to selectively guide the fluid output by the replenishing pump (1) to the pressure input chamber (21) or to depressurize the pressure input chamber (21). The transformer unit (2) also includes an elastic reset member (24). The elastic reset member (24) acts on the fan blade amplitude cylinder (3) and / or the pressure transmission component (23). The elastic reset member (24) is used to apply a force to the pressure transmission component (23) in the opposite direction to the fluid in the pressure input chamber (21).
4. The fan blade amplitude-changing system according to claim 3, characterized in that, The elastic reset member (24) includes a first spring (241) acting on the side of the piston of the booster cylinder facing the small cavity of the booster cylinder.
5. The fan blade amplitude variation system according to claim 3, characterized in that, The rodless chamber of the fan blade amplitude cylinder (3) is connected to the pressure output chamber (22), and the elastic reset member (24) includes a second spring (242) acting on the piston rod of the fan blade amplitude cylinder (3) toward the rod chamber side of the fan blade amplitude cylinder (3).
6. The fan blade amplitude variation system according to claim 3, characterized in that, The reversing valve (4) has a fluid inlet (P) and a fluid outlet (T) on one side and a working connection port (a) on the other side. The fluid inlet (P) and the fluid outlet (T) are respectively connected to the oil replenishment pump (1) and the pressure relief pipeline. The working connection port (a) is connected to the pressure input chamber (21). The reversing valve (4) has a drive valve position and a pressure relief valve position. The drive valve position is configured such that the fluid inlet (P) is connected to the working connection port (a), and the pressure relief valve position is configured such that the fluid outlet (T) is connected to the working connection port (a).
7. The fan blade amplitude adjustment system according to claim 5, characterized in that, The reversing valve (4) is an electromagnetic reversing valve.
8. The fan blade amplitude conversion system according to any one of claims 1 to 7, characterized in that, The pressure output chamber (22) is hydraulically or pneumatically connected to the fan blade amplitude cylinder (3).
9. A heat dissipation module for a work machine, characterized in that, Includes the fan blade amplitude-changing system according to any one of claims 1 to 8.
10. A working machine, comprising a hydraulic system, said hydraulic system including a closed-loop pump, said closed-loop pump being equipped with a replenishing pump, characterized in that, The operating machinery also includes a heat dissipation module as described in claim 9.