Pilot valve with double cut-off surfaces
By designing a pilot valve with double cross-sectional surface, the piston sleeve and the cross-sectional surface of the main control end and the spring limit seat are used to solve the problem of high sealing requirements in the prior art, and linear regulation and stability of liquid flow are achieved, reducing processing difficulty and cost.
Patent Information
- Application Number
- CN202422481492.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-14
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-10-14
AI Technical Summary
The existing pilot valves use a circumferential end face seal when the pilot valve seat is matched with the pilot valve core, which leads to high sealing requirements and high difficulty, making it difficult to achieve linear control of liquids.
A pilot valve with double cross-sectional surface is designed. Through the cross-sectional surface between the piston sleeve and the main control end and the cooperation between the piston rod and the mating hole, combined with the structure of the spring limit seat and the control seat, the stable guidance of the piston rod and the linear control of the flow rate is achieved.
The stable movement of the piston rod and the piston sleeve is achieved, which reduces processing difficulty, improves the performance stability and mass production capacity of the product, reduces costs, and achieves the controllability of the liquid flow through linear regulation.
Smart Images
Figure CN223164928U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pilot valves, and specifically relates to a pilot valve with a double throttling surface. Background Technique
[0002] A shock absorber is an important part of an automobile suspension, and its main function is to eliminate the vibration caused by road bumps. The shock absorber absorbs the vibration energy of the spring by using the internal fluid and pores, and converts it into heat energy to release, eliminating the adverse energy of the vehicle, enabling the vehicle to bring a more comfortable experience and better safety to the driver and passengers, and is particularly beneficial to the protection of products such as batteries in new energy vehicles. Traditional shock absorbers have only fixed damping characteristics and cannot be adjusted in real time, while the application of pilot solenoid valves can increase the damping characteristics, form an adjustable damping characteristic field, and improve the comfort and safety of the vehicle. In the current technology, when the pilot valve seat and the pilot valve core are matched, a circumferential and end face seal is adopted to form a throttling effect, thereby realizing linear control of the liquid. The matching requirements are high and the difficulty is great. Content of the Utility Model
[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a pilot valve with a double throttling surface to solve the deficiencies of the prior art.
[0004] The purpose of the utility model is achieved by the following technical solutions: A pilot valve with a double throttling surface includes a coil assembly, an electromagnet assembly, and a main valve sleeve assembly assembled together in sequence. The main valve sleeve assembly includes a main control sleeve, a main control seat, a main control end, a piston sleeve, and a piston rod. The main control sleeve is assembled on the electromagnet assembly. The main control sleeve is hollow. The piston sleeve and the main control seat are both circumferentially fixed in the main control sleeve. The main control end is assembled in the main control sleeve with a gap, and the main control end is located between the piston sleeve and the main control seat. The piston rod is slidably assembled in the main control sleeve, and the piston rod moves axially along the piston sleeve. The piston sleeve is located between the piston rod and the main control end.
[0005] The main control seat is provided with a central large hole penetrating through it, the main control end is provided with a small hole penetrating through it, one end of the piston sleeve close to the piston rod is provided with a mating hole, the mating hole is located on the moving path of the piston rod, a flow-through hole communicating with the mating hole is provided on the side wall of the piston sleeve, the main control seat and the main control end are in contact to form a first throttling surface, and the piston rod and the mating hole are matched to form a second throttling surface.
[0006] Further, the main valve sleeve assembly further includes a spring limit seat, the spring limit seat is circumferentially fixed in the main control sleeve, the spring limit seat is provided with a diversion hole penetrating through it, the piston sleeve is located between the spring limit seat and the main control end, the piston rod slidably penetrates through the spring limit seat, and the spring limit seat is used to guide the piston rod.
[0007] Further, the piston rod includes a long cylinder and a frustum of a cone. The long cylinder slides through the spring limit seat. One end of the long cylinder close to the piston sleeve is connected to the large-diameter end of the frustum of the cone. The shape of the mating hole is conical, and the diameter gradually decreases in the direction away from the piston rod.
[0008] Further, the main valve sleeve assembly further includes a regulating seat. The regulating seat is assembled in the main control sleeve with a clearance. The regulating seat is arranged close to the electromagnet assembly. And the spring limit seat is located between the piston sleeve and the regulating seat. A secondary spring is arranged between the spring limit seat and the regulating seat. A side flow hole is penetrated and opened on the regulating seat.
[0009] Further, the piston sleeve is of a stepped shaft structure. A gasket is fixedly sleeved on one end of the piston sleeve close to the main control end. A main spring is arranged between the gasket and the main control end.
[0010] Further, a main control seat gasket is arranged between the main control seat and the main control sleeve. A side through-flow hole is opened on the side wall of the main control sleeve. The side through-flow hole is located between the main control seat and the main control end.
[0011] Further, the electromagnet assembly includes a housing and an inlay. The housing is assembled at one end of the coil assembly. The inlay is press-fitted in the housing with an interference fit. A sealing ring is arranged between the inlay and the housing. An installation step is formed in the inlay. One end of the main control sleeve away from the main control seat is fixedly assembled in the inlay. A flow guiding gap is formed between one end of the main control sleeve away from the main control seat and the installation step. A flow guiding channel is formed between the outer wall of the main control sleeve and the inner wall of the inlay. The flow guiding channel communicates with the flow guiding gap. The regulating seat opens or closes the flow guiding gap by moving.
[0012] Further, the electromagnet assembly further includes a guide bearing, an iron core, a driving shaft and a limit seat. The guide bearing, the iron core and the limit seat are fixedly assembled in sequence along the direction close to the regulating seat. One end of the driving shaft slides through the guide bearing, the iron core and contacts the regulating seat with the limit seat. A limit seat bearing is arranged between the driving shaft and the limit seat.
[0013] Further, an outer housing sealing ring is sleeved on the housing.
[0014] The beneficial effects of the present utility model are as follows:
[0015] The piston rod and the piston sleeve achieve the first seal. The regulating seat and the main control sleeve achieve the second end face seal. The mating surface of the spring limit seat and the piston rod is lengthened, the guiding surface is longer, the movement is more stable, the assembly is simple, the processing difficulty is reduced, the performance is more stable, it is convenient for mass production, and the cost is reduced. Description of the Drawings
[0016] Figure 1 Schematic diagram of the internal structure of a pilot valve with a double throttling surface according to the present utility model;
[0017] Figure 2 is Figure 1 the enlarged view at I in
[0018] Figure 3 Schematic diagram of the structure of the piston rod in a pilot valve with a double throttling surface according to the present utility model;
[0019] Figure 4 Schematic diagram of the structure of the spring limit seat in a pilot valve with a double throttling surface according to the present utility model;
[0020] Figure 5 Schematic diagram of the structure of the piston sleeve in a pilot valve with a double throttling surface according to the present utility model;
[0021] Figure 6 Flow channel display of a pilot valve with a double throttling surface according to the present utility model;
[0022] Figure 7 Schematic diagram of the structure of a pilot valve with a double throttling surface according to the present utility model;
[0023] In the figure, 1 - coil assembly, 2 - housing, 3 - housing sealing ring, 4 - main control sleeve, 5 - main control seat gasket, 6 - main control seat, 7 - main control end, 8 - main spring, 9 - limit seat bearing, 10 - limit seat, 11 - drive shaft, 12 - iron core, 13 - guide bearing, 14 - embedded body, 15 - sealing ring, 16 - piston sleeve, 17 - gasket, 18 - piston rod, 19 - spring limit seat, 20 - auxiliary spring, 21 - regulation seat, 22 - electromagnet assembly, 23 - main valve sleeve assembly, 24 - central large hole, 25 - small hole, 26 - mating hole, 27 - flow through hole, 28 - long cylinder, 29 - frustum, 30 - diversion hole, 31 - side flow hole, 32 - side through flow hole, 33 - diversion channel. Specific implementation mode
[0024] Embodiment 1
[0025] As Figures 1 to 7As shown in the figure, a pilot valve with a double throttling surface includes a coil assembly 1, an electromagnet assembly 22, and a main valve sleeve assembly 23 that are assembled together in sequence. The main valve sleeve assembly 23 includes a main control sleeve 4, a main control seat 6, a main control end 7, a piston sleeve 16, and a piston rod 18. The main control sleeve 4 is assembled on the electromagnet assembly 22. The main control sleeve 4 is hollow. The piston sleeve 16 and the main control seat 6 are both circumferentially fixed inside the main control sleeve 4. The main control end 7 is assembled in the main control sleeve 4 with a clearance, and the main control end 7 is located between the piston sleeve 16 and the main control seat 6. The piston rod 18 is slidably assembled inside the main control sleeve 4, and the piston rod 18 moves axially along the piston sleeve 16. The piston sleeve 16 is located between the piston rod 18 and the main control end 7. The piston rod 18 includes a long cylinder 28 and a frustum 29. The long cylinder 28 slidably passes through the spring limit seat 19. One end of the long cylinder 28 close to the piston sleeve 16 is connected to the large diameter end of the frustum 29. The shape of the mating hole 26 is conical, and the diameter gradually decreases in the direction away from the piston rod 18. The arc surface of the piston rod 18 and the conical surface of the piston sleeve 16 form a second throttling surface, and the main control seat 6 and the main control end 7 form a first throttling surface. The size of the clearance between the piston rod 18 and the piston sleeve 16 directly affects the size of the first throttling surface, and linear regulation of the flow rate is carried out.
[0026] Embodiment 2
[0027] On the basis of Embodiment 1, as Figures 1 to 6As shown, a central large hole 24 is perforated through the main control seat 6, a small hole 25 is perforated through the main control end 7, a mating hole 26 is provided at one end of the piston sleeve 16 close to the piston rod 18, the mating hole 26 is located on the moving path of the piston rod 18, a flow-through hole 27 communicating with the mating hole 26 is provided on the side wall of the piston sleeve 16, the main control seat 6 and the main control end 7 contact to form a first throttling surface, the piston rod 18 and the mating hole 26 cooperate to form a second throttling surface, the main valve sleeve assembly 23 further includes a spring limiting seat 19, the spring limiting seat 19 is fixedly arranged circumferentially in the main control sleeve 4, a diversion hole 30 is perforated through the spring limiting seat 19, the piston sleeve 16 is located between the spring limiting seat 19 and the main control end 7, the piston rod 18 slidably penetrates through the spring limiting seat 19, and the spring limiting seat 19 is used to guide the piston rod 18. The main valve sleeve assembly 23 further includes a regulating seat 21, the regulating seat 21 is assembled in the main control sleeve 4 with a clearance, the regulating seat 21 is arranged close to the electromagnet assembly 22, and the spring limiting seat 19 is located between the piston sleeve 16 and the regulating seat 21. A secondary spring 20 is arranged between the spring limiting seat 19 and the regulating seat 21. A side flow hole 31 is perforated through the regulating seat 21. The piston sleeve 16 has a stepped shaft structure, and a gasket 17 is fixedly sleeved at one end of the piston sleeve 16 close to the main control end 7. A main spring 8 is arranged between the gasket 17 and the main control end 7. A main control seat gasket 5 is arranged between the main control seat 6 and the main control sleeve 4. A side flow-through hole 32 is provided on the side wall of the main control sleeve 4, and the side flow-through hole 32 is located between the main control seat 6 and the main control end 7. The electromagnet assembly 22 includes a housing 2 and an inlay 14. The housing 2 is assembled at one end of the coil assembly 1, the inlay 14 is press-fitted in the housing 2 with an interference fit, a sealing ring 15 is arranged between the inlay 14 and the housing 2, an installation step is formed in the inlay 14, one end of the main control sleeve 4 away from the main control seat 6 is fixedly assembled in the inlay 14, a diversion gap is formed between one end of the main control sleeve 4 away from the main control seat 6 and the installation step, a diversion channel 33 is formed between the outer wall of the main control sleeve 4 and the inner wall of the inlay 14, and the diversion channel 33 communicates with the diversion gap. The regulating seat 21 opens or closes the diversion gap by moving; the piston rod 18 and the piston sleeve 16 achieve the first sealing, the regulating seat 21 and the main control sleeve 4 achieve the second end face sealing. The original method of guiding the piston rod 18 through a spring is changed to guiding through the spring limiting seat 19. The mating surface between the spring limiting seat 19 and the piston rod 18 is lengthened, the guiding surface is longer, the movement is more stable, the assembly is simple, the processing difficulty is reduced, the performance is more stable, it is convenient for mass production, and the cost is reduced; secondly, the processing difficulty of parts is reduced, the assembly is more convenient than before. After canceling the spring, the difference in performance consistency caused by the instability of the spring force is eliminated, and the performance consistency of the product is better.The specific operation process of the above-mentioned pilot valve is as follows: When the current is 0A, the liquid flows into from the central large hole 24 of the main control seat 6, enters between the main control seat 6 and the main control end 7, and the liquid pressure acting on the end face of the main control end 7 pushes the main control end 7 towards the piston sleeve 16. The liquid between the piston sleeve 16 and the main control end 7 enters the mating hole 26 from the flow-through hole 27 on the outer circle of the piston sleeve 16. The internal liquid pressure acts on the piston rod 18 and pushes the piston rod 18 towards the spring limit seat 19. At the same time, due to the clearance fit between the piston rod 18 and the inner hole of the piston sleeve 16, the liquid flows from the clearance between the piston rod 18 and the inner wall of the piston sleeve 16, enters between the control seat 21 and the spring limit seat 20 through the diversion hole 30 of the spring limit seat 19. The liquid pressure acts on the end face of the control seat 21 and pushes the control seat 21 towards the limit seat 10 until the bottom surface of the large end face of the control seat 21 fits with the end face of the limit seat 10, closing the diversion gap at the bottom of the main control sleeve 4. At this time, the performance of the valve assembly shows that the pressure and flow rate are in the middle state of the adjustable range, forming 0A protection.
[0028] When the coil assembly 1 is energized, the driving shaft 11 is pushed by the electromagnetic force towards the limit seat 10. After the driving shaft 11 contacts the control seat 21, the electromagnetic force further drives the control seat 21 towards the spring limit seat 19. At the same time, the control seat 21 pushes the piston rod 18 towards the piston sleeve 16, and the flow-through gap between the two gradually decreases, and the flow rate gradually decreases. At this time, affected by the liquid pressure, the liquid pressure on the side of the piston rod 18 close to the spring limit seat 19 increases and is greater than the liquid pressure at the oil inlet of the piston rod 18 close to the piston sleeve 16, pushing the piston rod 18 towards the oil inlet of the piston sleeve 16. The flow-through area of the oil inlet of the piston sleeve 16 gradually decreases, thereby affecting the increase in the liquid pressure of the main control end 7 close to the piston sleeve 16. After the liquid pressure is superimposed with the spring force of the main spring 8, the superimposed force is greater than the pressure at the oil inlet of the main control seat 6 on the main control end 7, pushing the main control end 7 towards the main control seat 6, and the flow-through gap between the two gradually decreases, and the flow rate gradually decreases, forming a linear regulation. When the current of the coil assembly 1 decreases, this process moves in the reverse direction, and the flow rate gradually increases until it reaches the 0A state.
[0029] Embodiment 3
[0030] On the basis of Embodiment 2, as Figure 1 and Figure 7As shown, the electromagnet assembly 22 further includes a guide bearing 13, an iron core 12, a drive shaft 11, and a limit seat 10. The guide bearing 13, the iron core 12, and the limit seat 10 are fixedly assembled in sequence along the direction close to the regulation seat 21. One end of the drive shaft 11 slides through the guide bearing 13, the iron core 12 in sequence and contacts the regulation seat 21 through the limit seat 10. A limit seat bearing 9 is provided between the drive shaft 11 and the limit seat 10. An outer shell seal ring 3 is sleeved on the outer shell 2. The coil assembly 1, according to the current input by external control, forms a magnetic circuit between the inlay 14 on the outer shell 2, the magnetic core 12, and the guide bearing 13. The movement away of the electromagnet here is prior art and will not be elaborated here. By magnetic force, the drive shaft 11 on the magnetic core 12 is pushed to move, forming a controllable flow pressure regulation mechanism.
Claims
1. A pilot valve with a double cut-off surface, comprising a coil assembly (1), an electromagnet assembly (22) and a main valve sleeve assembly (23) assembled together in sequence, characterized in that, The main valve sleeve assembly (23) includes a main control sleeve (4), a main control seat (6), a main control end (7), a piston sleeve (16) and a piston rod (18). The main control sleeve (4) is assembled on the electromagnet assembly (22). The main control sleeve (4) is hollow. The piston sleeve (16) and the main control seat (6) are both circumferentially fixed within the main control sleeve (4). The main control end (7) is assembled with a clearance within the main control sleeve (4), and the main control end (7) is located between the piston sleeve (16) and the main control seat (6). The piston rod (18) is slidably assembled within the main control sleeve (4), and the piston rod (18) moves axially along the piston sleeve (16). The piston sleeve (16) is located between the piston rod (18) and the main control end (7). The main control seat (6) is provided with a central large hole (24) penetrating therethrough. The main control end (7) is provided with a small hole (25) penetrating therethrough. One end of the piston sleeve (16) close to the piston rod (18) is provided with a mating hole (26). The mating hole (26) is located on the moving path of the piston rod (18). A flow-through hole (27) communicating with the mating hole (26) is provided on the side wall of the piston sleeve (16). The main control seat (6) and the main control end (7) contact to form a first throttling surface. The piston rod (18) and the mating hole (26) cooperate to form a second throttling surface.
2. The pilot valve with a double throttling surface according to claim 1, characterized in that, The main valve sleeve assembly (23) further includes a spring limit seat (19). The spring limit seat (19) is circumferentially fixed within the main control sleeve (4). The spring limit seat (19) is provided with a diversion hole (30) penetrating therethrough. The piston sleeve (16) is located between the spring limit seat (19) and the main control end (7). The piston rod (18) slidably passes through the spring limit seat (19). The spring limit seat (19) is used to guide the piston rod (18).
3. The pilot valve with a double throttling surface according to claim 2, characterized in that, The piston rod (18) includes a long cylinder (28) and a frustum (29). The long cylinder (28) slidably passes through the spring limit seat (19). One end of the long cylinder (28) close to the piston sleeve (16) is connected to the large diameter end of the frustum (29). The shape of the mating hole (26) is conical, and the diameter gradually decreases in the direction away from the piston rod (18).
4. A pilot valve with a double throttling surface according to claim 3, characterized in that, The main valve sleeve assembly (23) further includes a regulation seat (21). The regulation seat (21) is assembled with a clearance within the main control sleeve (4). The regulation seat (21) is arranged close to the electromagnet assembly (22). The spring limit seat (19) is located between the piston sleeve (16) and the regulation seat (21). A secondary spring (20) is arranged between the spring limit seat (19) and the regulation seat (21). The regulation seat (21) is provided with a side flow hole (31) penetrating therethrough.
5. A pilot valve with a double throttling surface according to claim 1, characterized in that, The piston sleeve (16) has a stepped shaft structure. A gasket (17) is fixedly sleeved on one end of the piston sleeve (16) close to the main control end (7). A main spring (8) is arranged between the gasket (17) and the main control end (7).
6. A pilot valve with a double throttling surface according to claim 1, characterized in that, A main control seat gasket (5) is provided between the main control seat (6) and the main control sleeve (4). A side flow-through hole (32) is formed in the side wall of the main control sleeve (4), and the side flow-through hole (32) is located between the main control seat (6) and the main control end (7).
7. A pilot valve with a double throttling surface according to claim 4, characterized in that, The electromagnet assembly (22) includes a housing (2) and an inner insert (14). The housing (2) is assembled at one end of the coil assembly (1). The inner insert (14) is press-fitted into the housing (2) with an interference fit. A sealing ring (15) is provided between the inner insert (14) and the housing (2). An installation step is formed in the inner insert (14). One end of the main control sleeve (4) away from the main control seat (6) is fixedly assembled in the inner insert (14). A flow guiding gap is formed between one end of the main control sleeve (4) away from the main control seat (6) and the installation step. A flow guiding channel (33) is formed between the outer wall of the main control sleeve (4) and the inner wall of the inner insert (14). The flow guiding channel (33) communicates with the flow guiding gap. The regulation seat (21) opens or closes the flow guiding gap by moving.
8. A pilot valve with a double throttling surface according to claim 7, characterized in that, The electromagnet assembly (22) further includes a guide bearing (13), an iron core (12), a drive shaft (11), and a limit seat (10). The guide bearing (13), the iron core (12), and the limit seat (10) are fixedly assembled in sequence along the direction close to the regulation seat (21). One end of the drive shaft (11) slides through the guide bearing (13), the iron core (12), and contacts the regulation seat (21) through the limit seat (10). A limit seat bearing (9) is provided between the drive shaft (11) and the limit seat (10).
9. A pilot valve with a double throttling surface according to claim 7, characterized in that, An outer housing sealing ring (3) is sleeved on the housing (2).