Exhaust and oil discharge one-way valve
By designing a screw plug structure with through holes and side grooves in the exhaust and oil drain check valve, combined with a steel or ceramic ball and a spring, the problems of complex processing and high cost in the existing technology are solved, achieving stable flow control and precise response, and meeting the high standard requirements of the transmission system.
Patent Information
- Application Number
- CN202423175888.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-12-23
AI Technical Summary
The existing exhaust and oil discharge check valves have complex manufacturing processes, are difficult to manufacture, and are costly. They also have limitations in accurately controlling flow and responding to specific pressure changes, and cannot meet the requirements of high-standard applications.
Design a one-way valve for venting and draining oil. It uses a screw plug with an opening along the flow channel and a side groove at the end of the flow channel. Combined with a ball and spring made of steel or ceramic material, the flow rate is controlled by the gap between the ball and the valve body and the diameter of the screw plug hole, so as to ensure that the valve opens and closes accurately within a specific pressure range.
It simplifies the processing technology, reduces costs, improves yield, ensures the stability and precise control of flow, and meets high-standard application requirements.
Smart Images
Figure CN223524505U_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of hydraulic control systems for transmissions, and particularly relates to a one-way valve for venting and draining oil. Background Technology
[0002] like Figure 1 As shown, in the existing exhaust and oil drain check valve, liquid / gas enters from port 1. When the hydraulic pressure exceeds the spring preload, the steel ball moves from port 1, thus opening the entire oil circuit (oil circuit as shown). Figure 1 (As shown by the middle arrow), the oil passage passes through the inner hole of the screw plug, and the oil flows out from port 2. When the pressure at port 1 increases further, the spring is further compressed, and the steel ball presses against the chamfered surface of the screw plug, thus forming a seal between the spherical surface and the chamfered surface of the screw plug, preventing oil leakage at port 2 and ensuring a sealed structure. This allows the one-way valve to open within a specific pressure range; it cannot open below or above this pressure range. This achieves the system's venting function.
[0003] The existing screw plug processing technology is relatively complex, employing bottom drilling and side drilling, which makes processing relatively difficult, and metal shavings are not easy to remove, easily resulting in defects such as burrs and flash. The processing cost is high, and the processing time is long.
[0004] Valves often have limitations in precisely controlling flow and responding to specific pressure changes. This is especially true in gearboxes where precise flow and pressure control is required, where traditional check valves often fail to meet high-standard application requirements. Summary of the Invention
[0005] To address the problems existing in the prior art, the purpose of this application is to provide a one-way valve for exhaust and oil discharge.
[0006] The technical solution is as follows:
[0007] A one-way valve for venting and draining oil includes a valve body, a plug, a spring, and a ball. The plug, spring, and ball are disposed in a flow channel within the valve body. The two ends of the spring abut against the plug and the ball, respectively. The ball is disposed at the inlet end of the flow channel, and the plug is disposed at the outlet end of the flow channel. An O-ring is disposed on the valve body. The plug has a through hole along the flow channel direction and a side groove at the end of the flow channel.
[0008] Furthermore, the sphere is made of steel or ceramic material.
[0009] Furthermore, the diameter of the sphere is determined according to the predetermined flow rate requirement, and the flow rate is controlled by the gap between the sphere and the inner diameter of the valve body or the diameter of the hole in the screw plug.
[0010] Furthermore, the spring constant of the spring is determined based on the predetermined valve opening pressure and valve closing pressure.
[0011] Further, the assembling process of the exhaust oil discharge check valve is:
[0012] Place the valve body in a horizontal position, and sequentially put a steel ball, a spring and a screw plug into the outlet end of the flow channel;
[0013] Put the O-ring into the sleeve.
[0014] The technical scheme provided by the embodiment of the application can include the following beneficial effects:
[0015] As can be seen from the above embodiment, under the premise of meeting the performance requirements, the bottom hole of the screw plug is changed into a through hole, and the side hole is changed into a side groove, which is convenient for processing, the burrs are easier to remove after processing, the product saves processing time and reduces cost, and the yield of the product is improved.
[0016] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS
[0017] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the application and, together with the specification, serve to explain the principles of the application.
[0018] Figure 1 is a sectional view of an exhaust oil discharge check valve in the background art.
[0019] Figure 2 is a schematic view of an exhaust oil discharge check valve of the application, wherein (a) and (b) are sectional views of the exhaust oil discharge check valve at two angles.
[0020] Figure 3 is a comparison schematic view of a screw plug of the application and a screw plug in the background art, wherein (a) is a comparison schematic view of the appearance of the screw plug, (b) is a comparison sectional view of the screw plug, and (c) is a comparison top view of the screw plug.
[0021] 1, valve body; 2, ball; 3, spring; 4, screw plug; 41, through hole; 42, side groove. DETAILED DESCRIPTION
[0022] The exemplary embodiments will be described in detail herein with reference to the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the application.
[0023] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting thereof. As used in this application and the appended claims, the singular forms "a," "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "and / or," as used herein, refers to and encompasses any and all possible combinations of one or more of the associated listed items.
[0024] As shown in the background art, Figure 2 The exhaust oil one-way valve provided by the application can include a valve body 1 and a screw plug 4, a spring 3 and a ball 2, the screw plug 4, the spring 3 and the ball 2 are arranged in a flow channel in the valve body 1, two ends of the spring 3 abut against the screw plug 4 and the ball 2 respectively, the ball 2 is arranged at an inlet end of the flow channel, the screw plug 4 is arranged at an outlet end of the flow channel, and an O-ring is arranged outside the valve body 1.
[0025] Figure 3 As shown in the comparison between the screw plug 4 of the application and the screw plug in the background art, the left side of the figure is the screw plug 4 of the application, and the right side is the screw plug in the background art. In the application, the screw plug 4 is provided with a through hole 41 along the direction of the flow channel and a side groove 42 at the end of the flow channel, that is, the flat bottom hole is changed into the through hole 41, and the side groove 42 does not need to be machined, thereby saving cost. In addition, the through hole 41 and the side groove 42 at the outlet end of the flow channel can be used for oil / gas outflow, the instantaneous flow impact is smaller, the pressure drop is reduced, and the flow stability is ensured.
[0026] In a specific implementation, the assembly process of the one-way valve is as follows: the valve body 1 is placed in a horizontal position, the ball 2, the spring 3 and then the screw plug 4 are sequentially placed from the outlet end of the flow channel, and then the screw plug 4 is pressed from top to bottom; and the O-ring is sleeved. It should be noted that the assembly process and direction of the O-ring are not limited in the application, and the assembly of the O-ring has no strict sequence with the assembly of the ball 2, the spring 3 and the screw plug 4.
[0027] In a specific implementation, the valve body 1 is cylindrical to simplify the manufacturing and installation process.
[0028] Specifically, the ball 2 is made of steel or ceramic material to ensure that the ball 2 has good wear resistance and corrosion resistance. In an embodiment, GCr15 material can be used, which has the characteristics of wear resistance, high contact fatigue strength and good hot workability.
[0029] In a specific implementation, the selection of the material of the valve body 1 needs to ensure that the valve has good pressure resistance and corrosion resistance, and considering the interference force in the assembly process of the screw plug 4 and the valve body 1, the material also needs to be able to withstand a pressure of at least 2 times the maximum working pressure to provide a safety margin. The internal diameter and length of the valve body 1 are determined according to the size of the ball 2 and the screw plug 4, and the force value of the spring 3 also needs to be considered to ensure the rationality of the design.
[0030] In the manufacturing process of the one-way valve, a flow meter is used to test whether the flow rate of the valve at different pressures meets the design requirements, and the size and shape of the flow passage are adjusted according to the test results to ensure that the flow rate meets the design requirements.
[0031] In an embodiment, the valve is designed to open at 0.6 bar≤oil pressure≤1.3 bar, the flow passage outlet end is closed at oil pressure>1.3 bar, the flow passage inlet end is closed at oil pressure<0.6 bar, and the flow rate can be accurately controlled at 3 ml / min<flow rate<15 ml / min. In this embodiment, a steel ball with a diameter of 4 mm is selected to ensure that the valve can be reliably opened at a pressure of 0.6-1.3 bar; the flow rate is controlled by designing the gap between the ball 2 and the inner diameter of the valve body 1 or the diameter of the hole in the gland 4. The spring 3 is made of corrosion-resistant material, and the spring constant is calculated to ensure that the steel ball can be smoothly opened at a pressure of 0.6-1.3 bar, while the flow passage outlet end is closed at oil pressure>1.3 bar, and the flow passage inlet end is closed at oil pressure<0.6 bar. The length, diameter and number of turns of the spring 3 need to ensure that it can work normally within the working pressure range; the installation position of the spring 3 needs to ensure that the spring 3 has enough space to compress and stretch within the valve body 1, while not affecting the movement of the steel ball. In this embodiment, the spring 3 has enough force at the sealing surface of the flow passage inlet end in the initial position to maintain sealing at oil pressure<0.6 bar, the spring 3 is normally compressed during the opening process of the valve at oil pressure 0.6-1.3 bar, and the ball 2 falls on the sealing surface of the flow passage outlet end to seal at oil pressure>1.3 bar. The spring 3 can be compressed in place in the space without hard interference with the gland 4 and the valve body 1, so that the spring 3 works normally.
[0032] As can be seen from the above embodiment, under the premise of meeting the performance requirements, the bottom hole of the gland 4 is changed to a through hole 41 and the side hole is a side groove 42, which is convenient for processing and the burrs are easier to remove after processing, saving processing time and reducing costs, while improving the yield of the product. The internal passage design takes into account the flow characteristics of the fluid, and in specific implementation, the maximum flow rate can be controlled by designing the passage size to meet the predetermined requirements.
[0033] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the application embrace any and all variations of the application that fall within the scope of the general inventive concept as expressed in the claims herein.
[0034] It should be understood that the application is not limited to the precise construction that has been described above and shown in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application.
Claims
1. An exhaust gas oil drain check valve characterized by, The valve body and the screw plug, spring and ball are arranged in the flow channel of the valve body, the two ends of the spring abut against the screw plug and the ball respectively, the ball is arranged at the inlet end of the flow channel, the screw plug is arranged at the outlet end of the flow channel, and the O-shaped ring is arranged outside the valve body.
2. The vent oil separation check valve of claim 1, wherein, The ball is made of steel material or ceramic material.
3. The vent oil separation check valve of claim 1, wherein, The diameter of the ball is determined according to the predetermined flow requirement, and the flow is controlled through the gap between the ball and the inner diameter of the valve body or the diameter of the hole in the screw plug.
4. The vent oil separation check valve of claim 1, wherein, The spring constant of the spring is determined according to the predetermined valve opening pressure and valve closing pressure.
5. The vent oil separation check valve of claim 1, wherein, The assembly process of the exhaust oil one-way valve is as follows: Place the valve body in a horizontal position, and sequentially put the steel ball, spring and screw plug into the outlet end of the flow channel; Put on the O-shaped ring.