Grease injection valve for distributed lubricating system and wind generating set
By designing a hydraulically controlled grease injection valve suitable for grease systems, the problems of complex and inapplicable structure of the traditional grease injection valve are solved, and the simple structure, low cost and strong grease circulation capacity of the grease injection valve are achieved.
Patent Information
- Application Number
- CN202421856057.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-08-02
AI Technical Summary
There is a lack of a hydraulically controlled grease injection valve specifically used in grease systems in the prior art. The traditional two-position three-way reversing valve is complex in structure, difficult to process and is not suitable for grease lubrication systems.
A grease injection valve for distributed lubrication system is designed, using a structure of sealing gap between the valve core and the valve body and hydraulically controlled reversing. The valve core is reversing through movement, and the grease pressure drives the valve core, simplifying the structure and processing process.
The grease injection valve has a simple internal structure, easy manufacturing, low cost, strong grease circulation capacity, simple and convenient operation, and is suitable for lubricating system circuits.
Smart Images
Figure CN222963719U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wind turbines, in particular to a grease injection valve for a distributed lubrication system and a wind turbine. Background Technique
[0002] The grease injection valve is a main component of the distributed lubrication system of a wind turbine. Its function is that when the system is running, the internal grease needs to flow through the grease injection valve to each external lubrication point. When the internal grease of the system is consumed, it is necessary to replenish the grease into the system through the grease injection valve, and when replenishing the grease, the grease can only enter the system and cannot flow into the external lubrication point. The grease injection valve essentially belongs to a two-position three-way reversing valve in the category of hydraulic systems.
[0003] Traditional two-position three-way reversing valves are mostly cartridge or stacked structures, and internally are mainly composed of a spool, a valve sleeve, a spring, a spring seat, and various sliding seals. The whole valve needs to be assembled with the valve body for use. The valve body is provided with various oil flow ports. The overall assembly is relatively heavy, and the internal structure is complex, difficult to process, and the processing cost is high. It is not suitable for the oil circuit of the grease lubrication system. At the same time, most of such reversing valves are solenoid valves, and the reset depends on the spring force. When applied in a grease system, the spring is relatively soft, and the grease is more viscous than the hydraulic oil in the traditional hydraulic system, so the spool is not easy to reset. If the spring rigidity is made very large, the solenoid coil of the solenoid valve will also be very heavy, which is not suitable for the application of the system.
[0004] Therefore, there is currently no special grease injection valve with a hydraulic control method specifically applied to the grease lubrication system. Content of the Utility Model
[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a grease injection valve for a distributed lubrication system.
[0006] Another purpose of the utility model is to provide a wind turbine.
[0007] The purpose of the utility model can be achieved by adopting the following technical solutions:
[0008] A grease injection valve for a distributed lubrication system comprises a valve body, a valve core, a return spring, an oil inlet joint, an oil outlet joint, a grease injection joint and an end cover, wherein a mounting hole for installing the valve core is arranged inside the valve body, the valve core is installed in the mounting hole, and a gap seal is formed between the valve core and the valve body, grease injection joints and end covers are arranged on the outer sides of both ends of the mounting hole on the valve body, a chamber for installing the return spring is formed between the end cover and the valve core, and the return spring is installed in the chamber, a main oil passage running through the upper and lower parts is arranged inside the valve body, an oil inlet joint and an oil outlet joint are arranged on the outer sides of both ends of the main oil passage on the valve body, a bypass oil passage is arranged inside the valve body and above the mounting hole, the bypass oil passage is communicated with the main oil passage through a process oil passage, the lower part of the bypass oil passage is communicated with the mounting hole, a groove is arranged inside the valve core, the valve core is made circumferential by moving the valve core, so that the groove is communicated with or dislocated with the main oil passage, thereby realizing the communication between the oil inlet joint and the oil outlet joint or the communication between the grease injection joint and the oil inlet joint.
[0009] Furthermore, the side of the valve core facing the grease injection joint is a conical structure, thereby forming a conical seal with the grease injection joint.
[0010] Furthermore, an indicator rod is provided on the side of the valve core facing the end cover, and the indicator rod passes through the return spring and passes out of the end cover.
[0011] Furthermore, a sealing ring is provided between the end cover and the indicator rod.
[0012] Furthermore, an inclined hole for connecting the main oil channel and the chamber is provided inside the valve body and below the mounting hole.
[0013] Furthermore, sealing gaskets are respectively arranged between the valve body and the oil inlet joint, the oil outlet joint, the grease injection joint and the end cover.
[0014] Furthermore, outer ends of the process oil passage and the bypass oil passage of the valve body are blocked by process plugs.
[0015] Another purpose of the utility model can be achieved by adopting the following technical solutions:
[0016] A wind power generator set comprises the above-mentioned grease injection valve for the distributed lubrication system.
[0017] Compared with the prior art, the utility model has the following advantages and beneficial effects:
[0018] 1. The grease injection valve of the utility model has a simple internal structure, eliminates the traditional seal, is easy to manufacture, and has low cost. It is especially suitable for the lubrication system circuit, has low requirements on the matching accuracy of parts, is not easy to get stuck, and has strong grease circulation capacity.
[0019] 2. The grease injection valve of the present utility model adopts hydraulic control for commutation. When commutation is required, grease is injected at the grease injection joint. After the grease is injected, the valve core is forced to commutate due to the action of the grease pressure until the valve core basically completely opens the bypass oil passage on the valve body. During this process, the valve core has a large moving stroke, the valve opening is large, and the grease flow capacity is strong. There is no need for manual commutation, and the operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic structural diagram of the grease injection valve when the lubrication system is working normally.
[0021] Figure 2 It is a schematic structural diagram of the grease injection valve when the lubrication system is replenishing grease. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0023] Embodiment 1:
[0024] As Figure 1As shown in the figure, this embodiment provides a grease injection valve for a distributed lubrication system, which includes a valve body 1, a valve core 2, a return spring 3, an oil inlet joint 4, an oil outlet joint 5, a grease injection joint 6 and an end cover 7. An installation hole 101 for installing the valve core 2 is arranged inside the valve body 1. The valve core 2 is installed in the installation hole 101, and there is a clearance seal between the valve core 2 and the valve body 1, which reduces the processing difficulty, increases the clearance, and reduces the risk of the valve core 2 getting stuck. On both outer sides of the installation hole 101 on the valve body 1, a grease injection joint 6 and an end cover 7 are respectively arranged. A chamber 106 for installing the return spring 3 is formed between the end cover 7 and the valve core 2. The return spring 3 is installed in the chamber 106. A main oil passage 102 penetrating up and down is arranged inside the valve body 1. On both outer sides of the main oil passage 102 on the valve body 1, an oil inlet joint 4 and an oil outlet joint 5 are respectively arranged. A bypass oil passage 104 is arranged inside the valve body 1 and above the installation hole 101. The bypass oil passage 104 is communicated with the main oil passage 102 through a process oil passage 103. The lower part of the bypass oil passage 104 is communicated with the installation hole 101. A groove 201 is arranged inside the valve core 2. When the lubrication system works normally, the groove is opposite to the main oil passage 102 on the valve body 1, so as to communicate the oil inlet joint 4 and the oil outlet joint 5, ensure that the grease runs smoothly in the grease injection valve, and has small resistance. When the lubrication system replenishes grease, the valve core 2 is moved to make the valve core 2 change direction, and the groove 201 is misaligned with the main oil passage 102 on the valve body 1. The grease injection joint 6 is communicated with the oil inlet joint 4 through the bypass oil passage 104 and the main oil passage 102.
[0025] To prevent slight leakage of grease from the grease injection joint at the end of the grease injection valve, one side of the valve core 2 facing the grease injection joint 6 is designed as a conical surface structure 202, so as to form a conical surface seal between the valve core 2 and the grease injection joint 6 and strengthen the sealing effect.
[0026] Furthermore, to prevent the conical surface seal from being abnormally forced to open due to insufficient spring force or a little leakage in the clearance seal between the valve core 2 and the valve body 1 filling the conical surface cavity, resulting in the failure of the conical surface seal. An inclined hole 105 for communicating the main oil passage 102 and the chamber 106 is arranged inside the valve body 1 and below the installation hole 101. The high-pressure grease in the main oil passage 102 is introduced into the chamber 106 through the inclined hole 105. The pressure presses on the end face of the valve core 2 to give the valve core 2 a rightward force, and presses the conical surface structure part tightly against the inner hole of the grease injection joint 6, strengthening the effect of the conical surface seal and ensuring no leakage during operation.
[0027] To solve the problem that it is difficult for the return spring 3 to reset the valve core 2 after the grease becomes viscous and slightly caked, and it is difficult to judge whether the position of the valve core 2 is correct, an indicating rod 8 can also be provided on the side of the valve core 2 facing the end cover 7. The indicating rod 8 passes through the return spring 3 and extends out of the end cover 7. When grease needs to be injected, the grease is injected from the oil port of the grease injection joint 6. After the valve core 2 moves, the indicating rod 8 extends out of the interior of the valve body 1. By the position of the indicating rod 8, it is convenient to judge the position of the internal valve core 2. When the grease injection stops and the valve core 2 does not reset, the valve core 2 can be reset by pushing back the indicating rod 8.
[0028] To further ensure the sealing effect of the grease injection valve, a sealing ring 9 can be provided between the end cover 7 and the indicating rod 8, and gaskets 10 are respectively provided between the valve body 1 and the oil inlet joint 4, the oil outlet joint 5, the grease injection joint 6 and the end cover 7. The outer sides of the process oil passage 103 and the bypass oil passage of the valve body 1 are blocked by process plugs 11.
[0029] The usage method of the present utility model is as follows:
[0030] When the lubrication system is working normally, the external oil pipe is respectively connected to the oil inlet joint 4 and the oil outlet joint 5, and the lubricating grease needs to enter the interior of the grease injection valve from the oil port of the oil inlet joint 4.
[0031] The grease flows through the main oil passage 102 of the valve body 1 through the oil inlet joint 4, and then reaches the groove of the valve core 2. Due to the clearance seal between the valve core 2 and the valve body 1, the grease cannot flow normally to both sides at the groove position, and then flows out from the oil port of the oil outlet joint 5 and enters the system lubrication point.
[0032] At this time, the grease has a certain pressure, and the grease will also enter the left end of the valve core 2, that is, the chamber 106 of the return spring 3, from the main oil passage 102 inside the valve body 1 through the inclined hole 105. After the pressure is formed in the chamber 106, a rightward thrust is given to the valve core 2, and the conical surface structure is pressed on the grease injection joint 6 to ensure that the grease does not flow out from the grease injection joint 6.
[0033] Furthermore, the grease will enter the bypass oil passage 104 from the main oil passage 102 through the process oil passage 103. Since the valve core 2 seals the lower end of the bypass oil passage 104, this oil passage is cut off at this time.
[0034] When the grease in the lubrication system is consumed and it is necessary to replenish grease into the system, the external oil pipe is temporarily connected to the grease injection joint 6, and grease is injected into the grease injection valve through the grease injection joint 6. At this time, the grease enters through the inner hole of the grease injection joint 6 and acts on the conical surface structure of the valve core 2, and the oil pressure pushes the valve core 2 to the left, as Figure 2 shown.
[0035] As the spool 2 moves, a small amount of grease in the chamber 106 of the return spring 3 flows back to the main oil passage through the inclined hole 105 in the valve body 1 and flows out from the oil outlet joint 5. At the same time, as the spool 2 moves, the main oil passage 102 of the valve body 1 and the passage from the oil inlet joint 4 to the oil outlet joint 5 are cut off. The grease injection joint 6 is communicated with the oil inlet joint 4 through the bypass oil passage 104 and the main oil passage 102. At this time, grease can be added to the inside of the lubrication system through this grease injection valve without entering the grease injection point.
[0036] Embodiment 2:
[0037] This embodiment provides a wind turbine generator, including the grease injection valve for the distributed lubrication system described in Embodiment 1.
[0038] As mentioned above, it is only a preferred embodiment of the utility model patent, but the protection scope of the utility model patent is not limited thereto. Any person skilled in the art within the scope disclosed by the utility model patent, according to the technical solution of the utility model patent and the inventive concept of the utility model patent, makes equivalent substitutions or changes, all belong to the protection scope of the utility model patent.
Claims
1. A grease injection valve for a distributed lubrication system, characterized in that: The grease injection joint and the end cap are respectively arranged on the outer sides of the two ends of the mounting hole on the valve body, and a chamber for installing the reset spring is formed between the end cap and the valve body, and the reset spring is installed in the chamber. A main oil passage running through the upper and lower parts is arranged inside the valve body, and an oil inlet joint and an oil outlet joint are respectively arranged on the outer sides of the two ends of the main oil passage on the valve body, and a bypass oil passage is arranged inside the valve body and above the mounting hole, and the bypass oil passage is connected with the main oil passage through the process oil passage, and the lower part of the bypass oil passage is connected with the mounting hole, and a groove is arranged inside the valve core, and the valve core is made circumferential by moving the valve core, so that the groove is connected with the main oil passage or dislocated, thereby realizing the connection between the oil inlet joint and the oil outlet joint or the connection between the grease injection joint and the oil inlet joint.
2. The grease injection valve for a distributed lubrication system according to claim 1, characterized in that: The side of the valve core facing the grease injection joint is a conical structure, thereby forming a conical seal with the grease injection joint.
3. The grease injection valve for a distributed lubrication system according to claim 1, characterized in that: A indicating rod is arranged on one side of the valve core facing the end cover, and the indicating rod passes through the return spring and out of the end cover.
4. The grease injection valve for a distributed lubrication system according to claim 3, characterized in that: A sealing ring is arranged between the end cover and the indicating rod.
5. The grease injection valve for a distributed lubrication system according to claim 1, characterized in that: An inclined hole for connecting the main oil channel and the chamber is arranged inside the valve body and below the mounting hole.
6. The grease injection valve for a distributed lubrication system according to claim 1, characterized in that: Sealing pads are respectively arranged between the valve body and the oil inlet joint, the oil outlet joint, the grease injection joint and the end cover.
7. The grease injection valve for a distributed lubrication system according to claim 1, characterized in that: The outer ends of the process oil passage and the bypass oil passage of the valve body are blocked by process plugs.
8. A wind turbine generator set, characterized in that: A grease injection valve for a distributed lubrication system comprising any one of claims 1 to 7.