Pilot valve with sealed end face
Through the coordination of the end-face sealing structure and the solenoid assembly, the problem of unstable performance of the external pilot valve is solved, simplified assembly and cost reduction are achieved, product consistency and stability are improved, and mass production is facilitated.
Patent Information
- Application Number
- CN202421016704.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-11
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-05-11
AI Technical Summary
The existing external pilot valve products have unstable performance and high matching requirements, which leads to low product consistency and difficulty in mass production, which increases costs.
The end-face sealing structure is adopted to form a sealing cut-off through the protruding cut-off surface and the annular cut-off surface, which simplifies the assembly process, reduces processing difficulty, facilitates mass production, and achieves linear liquid control through the coordination of the electromagnet assembly and the coil assembly.
The end surface seal between the pilot valve sleeve and the pilot valve core is realized, which simplifies the assembly process, reduces costs, and improves the consistency and use stability of the product, making it easier to mass production.
Smart Images
Figure CN222185602U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pilot valves, in particular to a pilot valve with end face sealing. Background Art
[0002] The automobile suspension system is an important component related to automobile safety, and the key component of suspension damping control is the pilot valve. The pilot valve has the characteristics of large flow and large pressure regulation. Most pilot valves on the market are divided into built-in and external types. The structure of the utility model is mainly used for external pilot valves. At present, the main problem of external pilot valves is that the product performance is unstable and the consistency is not high, which seriously limits the use and promotion of the product. The main reason is that the pilot valve sleeve and the pilot valve core use a circumferential end face seal to form a cutoff effect, thereby realizing liquid linear control, which has high matching requirements and great difficulty. Utility Model Content
[0003] The utility model aims to overcome the deficiencies of the prior art and provide a pilot valve with end face sealing, which implements end face sealing, is simple to assemble, reduces processing difficulty, is convenient for mass production, and reduces costs.
[0004] The purpose of the utility model is achieved through the following technical solutions: a pilot valve with end face sealing, comprising a coil assembly, an electromagnet assembly and a main valve sleeve assembly, wherein the coil assembly and the main valve sleeve assembly are respectively assembled at the two ends of the electromagnet assembly, the electromagnet assembly comprises a pole shoe body, the main valve sleeve assembly comprises a main valve sleeve, an end cover, a main valve core, a pilot valve sleeve, a pilot valve core and a cone valve core, the pole shoe body is connected to the main valve sleeve at one end away from the electromagnet assembly, the main valve sleeve is fixed with an end cover at one end away from the pole shoe body, and the pilot valve sleeve is fixed in the main valve sleeve, The main valve core and the pilot valve core are both loosely fitted in the main valve sleeve, the main valve core is located between the pilot valve sleeve and the end cover, the pilot valve sleeve is located between the pilot valve core and the main valve core, the cone valve core is arranged between the pilot valve core and the pilot valve sleeve, and the cone end of the cone valve core is adapted in the pilot valve sleeve, a main spring is arranged between the main valve core and the pilot valve sleeve, a pilot spring is arranged between the pilot valve core and the pilot valve sleeve, a first liquid outlet gap is formed between the end cover and the main valve core, and a second liquid outlet gap is formed between the pole shoe body and the main valve sleeve.
[0005] In some embodiments, a side guide hole is formed on the side wall of the main valve sleeve, the side guide hole is located between the end cover and the main valve core, and the side guide hole is connected to the first liquid outlet gap.
[0006] In some embodiments, a valve core guide hole is opened in the middle of the main valve core.
[0007] In some embodiments, the pilot valve sleeve is in a T-shape, and the main spring is sleeved on a raised end of the pilot valve sleeve.
[0008] In some embodiments, a guide hole is formed through the side wall of the raised end of the pilot valve sleeve, a center hole is formed through the plane end of the pilot valve sleeve, the guide hole is connected to the center hole, and a center guide hole is formed through the middle of the pilot valve core.
[0009] In some embodiments, an annular gasket is arranged between the main valve sleeve and the end cover, and the raised end sleeve of the pilot valve sleeve is provided with a special-shaped gasket. The two ends of the main spring respectively abut against the main valve core and the special-shaped gasket. The pilot valve sleeve is equipped with a pilot valve seat, and the pilot valve seat is hollow. A pilot gasket is installed in the pilot valve seat, and the pilot gasket is sleeved on the conical valve core. The end face of the pilot valve seat close to the pilot valve core is provided with an annular cut-off surface, and the end of the pilot valve core close to the pilot valve sleeve is provided with a raised cut-off surface, and the raised cut-off surface fits with the annular cut-off surface to cut off the flow.
[0010] In some embodiments, the electromagnet assembly includes a shell and a magnetic core shaft, the shell is assembled on the coil assembly through a clamping ring, the pole shoe body is fixedly assembled in the shell, the magnetic core shaft is coaxially arranged in the pole shoe body, and the magnetic core shaft moves close to or away from the pilot valve core.
[0011] In some embodiments, a guide bearing is fixedly provided in the pole shoe body, the guide bearing is sleeved on the magnetic core shaft, the magnetic core shaft is sleeved with a magnetic core, the magnetic core gap is assembled in the pole shoe body, a magnetic core seat is fixed in the pole shoe body, a magnetic core seat bearing is provided on the magnetic core seat, and the magnetic core seat bearing is sleeved on the magnetic core shaft.
[0012] In some embodiments, a pole shoe body sealing ring is provided between the shell and the pole shoe body, a shell sealing ring is mounted on the shell, and a coil sealing ring is mounted on one end of the shell close to the coil assembly.
[0013] The beneficial effects of the utility model are:
[0014] The pilot valve sleeve and the pilot valve core are sealed at the end face, that is, the raised cut-off surface and the annular cut-off surface are fitted to form a sealed cut-off, which is simple to assemble, reduces the processing difficulty, is convenient for mass production, and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the internal structure of a pilot valve with end face sealing according to the utility model;
[0016] Figure 2 It is a structural schematic diagram of a pilot valve sleeve in a pilot valve with end face sealing according to the utility model;
[0017] Figure 3 It is a structural schematic diagram of a pilot valve core in a pilot valve with end face sealing according to the utility model;
[0018] Figure 4 It is a structural schematic diagram of a pilot gasket in a pilot valve with end face sealing according to the utility model;
[0019] Figure 5 This is a schematic diagram of the structure of a cone valve core in a pilot valve with end face sealing according to the utility model;
[0020] Figure 6 This is a schematic structural diagram of a pole shoe body in a pilot valve with end face sealing according to the utility model;
[0021] Figure 7 This is a schematic diagram of oil flow in a pilot valve with end face sealing according to the utility model;
[0022] In the figure, 1-coil assembly, 2-coil sealing ring, 3-clamp ring, 4-housing, 5-housing sealing ring, 6-pole shoe body sealing ring, 7-pole shoe body, 8-main valve sleeve, 9-end cover gasket, 10-end cover, 11-main valve core, 12-main spring, 13-pilot valve sleeve, 14-special-shaped gasket, 15-conical valve core, 16-pilot gasket, 17-pilot valve seat, 18-pilot spring, 19-pilot valve core, 20-magnetic core seat, 21-magnetic core seat bearing, 22-magnetic core, 23-magnetic core shaft, 24-guide bearing, 25-annular cut-off surface, 26-raised cut-off surface, 27-side guide hole, 28-center guide hole, 29-guide hole. DETAILED DESCRIPTION
[0023] The technical solution of the present utility model is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present utility model is not limited to the following.
[0024] like Figures 1 to 7As shown, a pilot valve with end face sealing includes a coil assembly 1, an electromagnet assembly and a main valve sleeve assembly. The coil assembly 1 and the main valve sleeve assembly are respectively assembled at both ends of the electromagnet assembly. The electromagnet assembly includes a pole shoe body 7. The main valve sleeve assembly includes a main valve sleeve 8, an end cover 10, a main valve core 11, a pilot valve sleeve 13, a pilot valve core 19 and a cone valve core 15. The end of the pole shoe body 7 away from the electromagnet assembly is connected to the main valve sleeve 8. The end of the main valve sleeve 8 away from the pole shoe body 7 is fixed with the end cover 10. The pilot valve sleeve 13 is fixed to the main valve sleeve 8. The main valve core 11 and the pilot valve core 19 are both clearance-fitted in the main valve sleeve 8, the main valve core 11 is located between the pilot valve sleeve 13 and the end cover 10, the pilot valve sleeve 13 is located between the pilot valve core 19 and the main valve core 11, a cone valve core 15 is arranged between the pilot valve core 19 and the pilot valve sleeve 13, and the conical end of the cone valve core 15 is adapted in the pilot valve sleeve 13, a main spring 12 is arranged between the main valve core 11 and the pilot valve sleeve 13, a pilot spring 18 is arranged between the pilot valve core 19 and the pilot valve sleeve 13, and the end cover 10 is connected to the main valve core 11. A first liquid outlet gap is formed between the valve core 11, a second liquid outlet gap is formed between the pole shoe body 7 and the main valve sleeve 8, a side guide hole 27 is opened on the side wall of the main valve sleeve 8, the side guide hole 27 is located between the end cover 10 and the main valve core 11, and the side guide hole 27 is connected to the first liquid outlet gap, a valve core guide hole is opened in the middle of the main valve core 11, a guide hole 29 is opened through the side wall of the raised end of the pilot valve sleeve 13, a center hole is opened on the plane end of the pilot valve sleeve 13, the guide hole 29 is connected to the center hole, and the middle of the pilot valve core 19 is penetrated A central guide hole 28 is penetrated to form a first pressure chamber in the main valve core 11 and a second pressure chamber in the pilot valve sleeve 13. When oil enters, a part of it flows out through the first liquid outlet gap between the end cover 10 and the main valve core 11, and finally flows out of the pilot valve from the side guide hole 27, and a part of it enters the first pressure chamber through the valve core guide hole of the main valve core 11, and then enters the second pressure chamber through the guide holes 29 evenly distributed on the protrusion of the pilot valve sleeve 13, and then flows out through the second liquid outlet gap between the main valve sleeve 8 and the pole shoe body 7.
[0025] In some embodiments, Figures 1 to 4As shown, the pilot valve sleeve 13 is in a T-shape, the main spring 12 is sleeved on the raised end of the pilot valve sleeve 13, an annular gasket 9 is arranged between the main valve sleeve 8 and the end cover 10, and the raised end sleeve of the pilot valve sleeve 13 is provided with a special-shaped gasket 14, the two ends of the main spring 12 are respectively against the main valve core 11 and the special-shaped gasket 14, and the pilot valve sleeve 13 is matched with a pilot valve seat 17, the pilot valve seat 17 is hollow, and the pilot valve seat 17 is equipped with a pilot gasket 16, and the pilot gasket 1 6 is sleeved on the cone valve core 15, the end face of the pilot valve seat 17 close to the pilot valve core 19 is provided with an annular cut-off surface, and the end of the pilot valve core 19 close to the pilot valve sleeve 13 is provided with a raised cut-off surface 26, the raised cut-off surface 26 and the annular cut-off surface 25 fit together to cut off the flow, and the pilot valve seat 17 and the pilot valve core 19 implement end face sealing, that is, the raised cut-off surface 26 fits with the annular cut-off surface 25 to form a sealed cut-off, which is simple to assemble, reduces the difficulty of processing, is convenient for mass production, and reduces costs.
[0026] In some embodiments, Figure 1 , Figure 6 and Figure 7 As shown, the electromagnet assembly includes a shell 4 and a magnetic core shaft 23, the shell 4 is assembled on the coil assembly 1 through a clamp ring 3, the pole shoe body 7 is fixedly assembled in the shell 4, the magnetic core shaft 23 is coaxially arranged in the pole shoe body 7, the magnetic core shaft 23 moves close to or away from the pilot valve core 19, a guide bearing 24 is fixedly arranged in the pole shoe body 7, the guide bearing 24 is sleeved on the magnetic core shaft 23, the magnetic core shaft 23 is sleeved with a magnetic core 22, the magnetic core 22 is gap-assembled in the pole shoe body 7, a magnetic core seat 20 is fixed in the pole shoe body 7, a magnetic core seat bearing 21 is arranged on the magnetic core seat 20, and the magnetic core seat bearing 21 is sleeved on the magnetic core shaft 23, a pole shoe body sealing ring 6 is arranged between the shell 4 and the pole shoe body 7, a shell sealing ring 5 is sleeved on the shell 4, and a coil sealing ring 2 is sleeved on the end of the shell 4 close to the coil assembly 1; the coil assembly 1 passes through the shell 4, the pole shoe body 7 and the pole shoe body 7 according to the current input by the external control. The magnetic circuit formed between the boot body 7 and the core seat 20 and the core 22 pushes the core shaft 23 fixed on the core 22 to move. The movement of the core shaft 23 pushes the pilot valve core 19 to overcome the elastic force of the pilot spring 18 and the pressure formed by the liquid entering the pilot valve sleeve 13, and moves toward the pilot valve sleeve 13, thereby pushing the cone valve core 15 toward the pilot valve sleeve 13, and the conical surface gap between the two is reduced, the cut-off effect is increased, the liquid flow rate flowing into the pilot valve sleeve 13 is reduced, and the pressure in the first pressure chamber connected through the flow channel on the pilot valve sleeve 13 is increased. Under the combined force of the pressure and the spring force of the main spring 12, the liquid pressure acting on the main valve core 11 by the liquid flowing in from the end cover 10 exceeds the liquid pressure, and the main valve core 11 moves toward the end cover 10, and the gap between the two is reduced, and the cut-off effect is increased, resulting in a linear reduction in the liquid flow rate flowing in from the outside, forming a controllable flow pressure regulation mechanism.
[0027] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends" 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; and it is known to those skilled in the art that the beneficial effects to be achieved by the present invention are only to achieve better beneficial effects under specific circumstances compared with the current implementation schemes in the prior art, rather than to directly achieve the best use effect in the industry.
[0028] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.
Claims
1. A pilot valve with end face sealing, comprising a coil assembly (1), an electromagnet assembly and a main valve sleeve assembly, wherein the coil assembly (1) and the main valve sleeve assembly are respectively assembled at two ends of the electromagnet assembly. It is characterized in that The electromagnet assembly comprises a pole shoe body (7), and the main valve sleeve assembly comprises a main valve sleeve (8), an end cover (10), a main valve core (11), a pilot valve sleeve (13), a pilot valve core (19) and a cone valve core (15). The end of the pole shoe body (7) away from the electromagnet assembly is connected to the main valve sleeve (8), and the end cover (10) is fixed to the end of the main valve sleeve (8) away from the pole shoe body (7). The pilot valve sleeve (13) is fixed in the main valve sleeve (8), and the main valve core (11) and the pilot valve core (19) are both clearance-fitted in the main valve sleeve (8). The main valve core (11) is located between the pilot valve sleeve (13) and the end cover (15). 0), the pilot valve sleeve (13) is located between the pilot valve core (19) and the main valve core (11), the cone valve core (15) is arranged between the pilot valve core (19) and the pilot valve sleeve (13), and the cone end of the cone valve core (15) is adapted in the pilot valve sleeve (13), a main spring (12) is arranged between the main valve core (11) and the pilot valve sleeve (13), a pilot spring (18) is arranged between the pilot valve core (19) and the pilot valve sleeve (13), a first liquid outlet gap is formed between the end cover (10) and the main valve core (11), and a second liquid outlet gap is formed between the pole shoe body (7) and the main valve sleeve (8).
2. A pilot valve with end face sealing according to claim 1, It is characterized in that A side guide hole (27) is provided on the side wall of the main valve sleeve (8), the side guide hole (27) is located between the end cover (10) and the main valve core (11), and the side guide hole (27) is connected to the first liquid outlet gap.
3. A pilot valve with end face sealing according to claim 2, It is characterized in that A valve core flow guide hole is provided in the middle of the main valve core (11).
4. A pilot valve with end face sealing according to claim 3, It is characterized in that The pilot valve sleeve (13) is in a T-shape, and the main spring (12) is sleeved on the raised end of the pilot valve sleeve (13).
5. The end-face sealed pilot valve according to claim 4, It is characterized in that A flow guide hole (29) is formed through the side wall of the raised end of the pilot valve sleeve (13), a center hole is formed through the plane end of the pilot valve sleeve (13), the flow guide hole (29) is connected to the center hole, and a center flow guide hole (28) is formed through the middle of the pilot valve core (19).
6. The end-face sealed pilot valve according to claim 5, It is characterized in that An annular gasket (9) is arranged between the main valve sleeve (8) and the end cover (10); a convex end sleeve of the pilot valve sleeve (13) is provided with a special-shaped gasket (14); two ends of the main spring (12) respectively abut against the main valve core (11) and the special-shaped gasket (14); a pilot valve seat (17) is matched in the pilot valve sleeve (13); the pilot valve seat (17) is hollow; a pilot gasket (16) is arranged in the pilot valve seat (17); the pilot gasket (16) is sleeved on the cone valve core (15); an annular cut-off surface is arranged on the end face of the pilot valve seat (17) close to the pilot valve core (19); a convex cut-off surface (26) is arranged on one end of the pilot valve core (19) close to the pilot valve sleeve (13); the convex cut-off surface (26) fits with the annular cut-off surface (25) to cut off flow.
7. The end-face sealed pilot valve according to claim 1, It is characterized in that The electromagnet assembly further comprises a housing (4) and a magnetic core shaft (23); the housing (4) is mounted on the coil assembly (1) via a clamping ring (3); the pole shoe body (7) is fixedly mounted in the housing (4); the magnetic core shaft (23) is coaxially arranged in the pole shoe body (7); and the magnetic core shaft (23) moves closer to or away from the pilot valve core (19).
8. The end-face sealed pilot valve according to claim 6, It is characterized in that A guide bearing (24) is fixedly arranged inside the pole shoe body (7), the guide bearing (24) is sleeved on the magnetic core shaft (23), the magnetic core shaft (23) is sleeved with a magnetic core (22), the magnetic core (22) is gap-assembled in the pole shoe body (7), a magnetic core seat (20) is fixed inside the pole shoe body (7), a magnetic core seat bearing (21) is arranged on the magnetic core seat (20), and the magnetic core seat bearing (21) is sleeved on the magnetic core shaft (23).
9. The end-face sealed pilot valve according to claim 8, It is characterized in that A pole shoe body sealing ring (6) is arranged between the outer shell (4) and the pole shoe body (7), a shell sealing ring (5) is sleeved on the outer shell (4), and a coil sealing ring (2) is sleeved on one end of the outer shell (4) close to the coil assembly (1).