CN210240594U - Poppet valve driven by brushless linear motor - Google Patents
Poppet valve driven by brushless linear motor Download PDFInfo
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- CN210240594U CN210240594U CN201921349587.1U CN201921349587U CN210240594U CN 210240594 U CN210240594 U CN 210240594U CN 201921349587 U CN201921349587 U CN 201921349587U CN 210240594 U CN210240594 U CN 210240594U
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- 238000001514 detection method Methods 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims description 22
- 230000033001 locomotion Effects 0.000 claims description 11
- 239000004071 soot Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 230000008520 organization Effects 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 7
- 239000007789 gas Substances 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000005355 Hall effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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Abstract
The utility model discloses a poppet valve driven by a brushless linear motor, which comprises a valve seat, wherein the valve seat is provided with an air inlet and an air outlet; the top end of the valve seat is provided with a brushless linear motor, the brushless linear motor comprises a motor shell fixed with the top end of the valve seat, and a stator and a rotor which are respectively arranged in the motor shell, the rotor is fixedly connected with a motor output shaft, and the bottom end of the motor output shaft is provided with a valve plate; a position detection mechanism and a control chip are arranged in the motor shell, a signal output end of the position detection mechanism is connected to an input end of the control chip, and a controlled end of the brushless linear motor is connected to an output end of the control chip. The utility model discloses a brushless linear electric motor has cancelled the shifter as the executor power supply, has simplified the project organization, the cost is reduced widely. The utility model discloses a position detection mechanism can realize controlling the size of air flow.
Description
Technical Field
The utility model relates to an automobile parts technical field, especially a by brushless linear electric motor driven poppet valve.
Background
Most internal combustion engines have poppet valves, sometimes referred to as cone valves, poppet valves or poppet valves, as intake and exhaust valves, for controlling the flow of air into the combustion chambers of the engine and the flow of exhaust burned gases. Typically, poppet valves are operated by cams on a rotating camshaft. In large diesel engines, the residual pressure in the combustion chamber can reach 70 bar when the exhaust valve is opened. This requires a considerable force to be applied to the exhaust valve.
As emissions regulations are upgraded, control systems become increasingly complex, placing higher demands on the response speed, accuracy and size of the actuators. The actuator power source of the existing poppet valve mostly adopts a direct current brush motor, and the direct current brush motor is small in size, simple in structure and easy to control, and is the first choice of various actuator power sources. However, dc brushed motors have two disadvantages: firstly, the electric brush is abraded, and after the direct current brush motor is used for a period of time, the carbon brush is seriously abraded, so that the service life of a product is limited; secondly, size, ordinary motor all is rotary motion, all needs a set of structure, converts rotary motion into linear motion, needs to adopt the shifter, and this must bring the complexity of structure.
In addition, because the existing poppet valve converts the rotary motion into the linear motion, an unavoidable mechanical gap exists, and the opening signal is obtained through the angle signal interval, so that the accuracy of position feedback of the valve plate is reduced, and the accurate control of the air flow is finally influenced.
Disclosure of Invention
The utility model discloses the technical problem that needs to solve provides a by brushless linear electric motor driven poppet valve to solve current poppet valve and adopt the direct current to have the brush motor and restrict the life of product, and the structure is very complicated, and the problem that is difficult to carry out the accurate control to the size of gas flow that brings from this, with the life who increases the poppet valve, simplify the inner structure of poppet valve, realize the accurate detection and the control to the valve block degree of opening and shutting.
In order to solve the technical problem, the utility model adopts the following technical proposal.
A poppet valve driven by a brushless linear motor comprises a valve seat with a hollow cavity inside, wherein an air inlet and an air outlet are formed in the valve seat; the top end of the valve seat is provided with a brushless linear motor, the brushless linear motor comprises a motor shell fixed with the top end of the valve seat, and a stator and a rotor which are respectively arranged in the motor shell, the rotor is fixedly connected with a motor output shaft which penetrates through the motor shell, is movably arranged in the hollow cavity of the valve seat in a penetrating manner and is used for moving up and down under the driving of the brushless linear motor, and the bottom end of the motor output shaft is provided with a valve plate used for controlling the on-off between the air inlet and the air outlet under the up-and; the motor shell is internally provided with a position detection mechanism for detecting the moving position of the output shaft of the motor and a control chip for controlling the whole operation of the device, the signal output end of the position detection mechanism is connected with the input end of the control chip, and the controlled end of the brushless linear motor is connected with the output end of the control chip.
Further optimize technical scheme, position detection mechanism includes position sensor, and position sensor and control chip all set up on setting up the PCB board assembly on motor casing inner wall top, and position sensor's signal output part connects in control chip's input.
According to the technical scheme, the position sensor is a Hall position sensor, a section of magnet is arranged on the outer wall of the motor output shaft close to the Hall position sensor, and the signal output end of the Hall position sensor is connected to the input end of the control chip.
Further optimize technical scheme, set up the shoulder hole that is linked together with the air inlet in the disk seat, the shoulder hole includes from the top down sets gradually first shoulder hole, second shoulder hole and the third shoulder hole in the disk seat, and the air inlet is linked together through the through-hole of seting up in the disk seat and gas outlet.
Further optimize technical scheme, be provided with in the first step downthehole return structure that is used for guaranteeing that motor output shaft and valve block resume to the original position after brushless linear electric motor control became invalid.
Further optimize technical scheme, return structure is including fixed wedge locking plate, the spring holder of spiral-lock on the wedge locking plate of setting on motor output shaft and the cover establish motor output shaft periphery and one end is fixed to be set up on the spring holder and the return spring of the other end fixed setting on the diapire of first shoulder hole.
According to the technical scheme, the sealing guide structures which are used for playing a sealing role and guiding the output shaft of the motor are arranged in the second step hole and the third step hole.
Further optimize technical scheme, sealed guide structure is including inlaying the sealing washer that is used for preventing that high-temperature gas from scurrying in order to avoid brushless linear electric motor to damage because of the high temperature and inlaying the uide bushing that is used for playing the guide effect to the motor output shaft that inlays in the second step downthehole and is located the sealing washer under, and the motor output shaft passes the sealing washer and slides the sealed dress of joining in marriage with the sealing washer, and the motor output shaft passes the uide bushing.
According to the technical scheme, the guide sleeve is in a step shape, the lower portion of the guide sleeve is arranged in the third step hole and has a certain gap with the third step hole, a scraper which penetrates through the gap between the third step hole and the guide sleeve and is used for removing soot particles attached to the motor output shaft when the motor output shaft moves up and down is fixedly arranged on the guide sleeve so as to ensure that the lift valve cannot be clamped, and the bottom of the scraper is bent inwards and has a certain gap with the motor output shaft.
Further optimizing the technical scheme, the through hole is embedded with a nest, and the nest is provided with a through hole for the motor output shaft to pass through and a reaming hole which is tightly assembled with the top end of the valve block.
Due to the adoption of the technical scheme, the utility model has the following technical progress.
The utility model adopts the brushless linear motor which does not need any additional mechanism and directly outputs linear motion as the power source of the actuator, cancels the switching mechanism, simplifies the design structure, greatly reduces the cost and increases the reliability of the product; the motor output shaft is combined with the original valve rod, namely the original valve rod is replaced by the motor output shaft, so that the structure is further simplified, the cost is reduced, and the reliability is improved; the spring seat is fixed by adopting a wedge-shaped locking plate form, so that the assembly is simple and the cost advantage is obvious; the driving only needs a common H bridge, and is compatible with the existing general driving circuit. The utility model discloses a position detection mechanism can very accurately detect out the displacement condition of motor output shaft, and then with information feedback to control chip, realized the detection to the valve block degree of opening and shutting, control chip control brushless linear electric motor action realizes the control to the valve block degree of opening and shutting, and then realizes controlling the size of gas flow.
The utility model discloses a position detection mechanism adopts hall position sensor scheme, the utility model provides a position sensor is hall position sensor, is provided with one section magnet on being close to hall position sensor's the motor output shaft outer wall. When the output shaft of the motor moves up and down, the magnet on the output shaft of the motor generates relative displacement equivalent to the Hall position sensor, the Hall position sensor can output an electric signal corresponding to the current relative position, and the preset displacement-voltage signal can be output through programming. The utility model discloses based on hall effect, change into the signal of telecommunication change with magnetic field intensity's change, have that the energy consumption is low, longe-lived, simple structure, be not afraid of advantages such as greasy dirt dust.
The utility model discloses the return structure of first step downthehole setting is used for guaranteeing that motor output shaft and valve block resume to original position after brushless linear electric motor control became invalid. Under the effect of return spring elasticity, the spring holder has the trend of upward movement, because the existence of wedge locking plate, the spring holder is fixed, this simple structure is high-efficient, and the wedge locking plate is the standard component, and the cost advantage is obvious.
The utility model discloses the fixed scraper blade that is provided with on the uide bushing because the setting of scraper blade can realize the utility model discloses scrape the operation of getting to motor output shaft in the use, can in time clear away particulate matters such as soot attached to motor output shaft, not only ensure that the poppet valve can not block and die, can also prolong the life of poppet valve.
Drawings
Fig. 1 is a cross-sectional view of the present invention;
FIG. 2 is an equivalent schematic diagram of the Hall position sensor scheme adopted by the position detecting mechanism of the present invention;
fig. 3 is an exploded view of the present invention.
Wherein: 1. the brushless linear motor comprises a brushless linear motor 11, a motor output shaft 12 and a motor shell; 2. the device comprises a return structure 21, a wedge-shaped locking plate 22, a spring seat 23 and a return spring; 3. the sealing guide structure 31, the sealing ring 32, the guide sleeve 33 and the scraper; 4. valve seat, 41, air inlet, 42, air outlet, 43, stepped hole; 5. a valve plate; 6. nesting; 7. a position detection mechanism 71, a hall position sensor; 8. a PCB board assembly; 9. and (7) blocking the cover.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
A poppet valve driven by a brushless linear motor is shown in the figures 1 to 3 and comprises a valve seat 4, the brushless linear motor 1, a valve plate 5, a position detection mechanism 7 and a control chip.
The valve seat 4 is hollow and provided with an air inlet 41 and an air outlet 42.
Brushless linear motor 1 sets up the top at valve seat 4, and brushless linear motor 1's controlled end is connected in control chip's output. The brushless linear motor 1 includes a motor case 12, a stator, and a mover. The motor shell 12 is fixed with the top end of the valve seat 4. The stator and the rotor are respectively arranged in the motor shell 12, and the rotor is fixedly connected with a motor output shaft 11. The motor output shaft 11 is a long shaft, penetrates through the motor shell 12 and is movably arranged in the hollow cavity of the valve seat 4 in a penetrating mode, and is used for moving up and down under the driving of the brushless linear motor 1.
The brushless linear motor 1 is an electromechanical integrated product, not only cancels a brush structure, but also directly outputs linear motion, is very suitable for the application occasions of poppet valves, and has the characteristics of low cost, long service life, high reliability and the like. The utility model provides a brushless linear electric motor 1 adopts KYAC 2000 type linear electric motor, also can adopt the linear electric motor of other models.
The bottom of motor output shaft 11 is provided with valve block 5, adopts laser welding's mode to fix between valve block 5 and the motor output shaft 11. The valve plate 5 is used for controlling the on-off between the air inlet 41 and the air outlet 42 when the motor output shaft 11 moves up and down.
The utility model discloses still be provided with blanking cover 9 in gas outlet 42 department.
The position detection mechanism 7 is arranged in the motor shell 12 and used for detecting the moving position of the motor output shaft 11, and the signal output end of the position detection mechanism 7 is connected to the input end of the control chip. The position detection mechanism 7 comprises a position sensor, the position sensor and the control chip are both mounted and arranged on the PCB assembly 8, the PCB assembly 8 is arranged on the top end of the inner wall of the motor shell 12, and the signal output end of the position sensor is connected to the input end of the control chip.
The utility model discloses a position detection mechanism adopts hall position sensor scheme, the utility model provides a position sensor is hall position sensor 71, and hall position sensor 71's signal output part is connected in control chip's input. A section of magnet is arranged on the outer wall of the motor output shaft 11 close to the Hall position sensor 71, and the equivalent principle is shown in figure 2. When the motor output shaft 11 moves up and down, the magnet on the motor output shaft 11 generates relative displacement equivalent to the hall position sensor 71, the hall position sensor 71 outputs an electric signal corresponding to the current relative position, and the preset displacement-voltage signal can be output through programming.
The utility model discloses based on hall effect, change into the signal of telecommunication change with magnetic field intensity's change, have that the energy consumption is low, longe-lived, simple structure, be not afraid of advantages such as greasy dirt dust.
Control chip sets up in motor casing 12 for controlling means whole operation, the utility model provides a control chip adopts the ZVM64 singlechip of NXP. The control chip is communicated with the engine ECU through the CAN communication module and CAN work according to the working condition set inside the engine ECU.
The valve seat 4 is internally provided with a stepped hole 43 communicated with the air inlet 41, the stepped hole 43 comprises a first stepped hole, a second stepped hole and a third stepped hole which are sequentially arranged in the valve seat 4 from top to bottom, and the air inlet 41 is communicated with the air outlet 42 through a through hole arranged in the valve seat 4.
A return structure 2 is arranged in the first step hole, and the return structure 2 is used for ensuring that the motor output shaft 11 and the valve plate 5 can be restored to the original position after the brushless linear motor 1 is controlled to fail. The return structure 2 includes a wedge locking piece 21, a spring seat 22, and a return spring 23. The wedge-shaped locking plate 21 is fixedly arranged on the motor output shaft 11, a key groove is formed in the motor output shaft 11, and the wedge-shaped locking plate 21 is arranged in the key groove through a connecting key. The spring seat 22 is fastened on the wedge-shaped locking piece 21. The return spring 23 is sleeved on the periphery of the motor output shaft 11, one end of the return spring is fixedly arranged on the spring seat 22, and the other end of the return spring is fixedly arranged on the bottom wall of the first stepped hole. Under the effect of the elastic force of the return spring 23, the spring seat 22 tends to move upwards, and due to the existence of the wedge-shaped locking piece 21, the spring seat 22 is fixed, so that the structure is simple and efficient, and the wedge-shaped locking piece 21 is a standard piece, so that the cost advantage is obvious.
Sealed guide structure 3 is provided with in second step hole and the third step hole, and sealed guide structure 3 is used for playing sealed effect and leads to motor output shaft 11. The seal guide structure 3 includes a seal ring 31 and a guide sleeve 32. The sealing ring 31 is embedded in the second stepped hole to prevent high-temperature gas from flowing upward, so as to prevent the brushless linear motor 1 from being damaged due to overhigh temperature. The motor output shaft 11 passes through the sealing ring 31 and is in sliding sealing fit with the sealing ring 31.
The guide sleeve 32 is embedded in the second stepped hole and located right below the sealing ring 31, and is used for guiding the motor output shaft 11 and ensuring that the motor output shaft 11 always moves in the vertical direction. The motor output shaft 11 passes through the guide sleeve 32 and can slide in the guide sleeve 32. The guide sleeve 32 is in a step shape, the lower portion of the guide sleeve 32 is arranged in the third step hole and has a certain gap with the third step hole, a scraper 33 is fixedly arranged on the guide sleeve 32, and the scraper 33 penetrates through the gap between the third step hole and the guide sleeve 32 and is used for removing soot particles attached to the motor output shaft 11 when the motor output shaft 11 moves up and down so as to ensure that the lift valve cannot be blocked. The bottom of scraper blade 33 is inwards buckled and has certain clearance with motor output shaft 11 to guarantee that motor output shaft 11 can normally slide, and can guarantee that motor output shaft 11 is scraped by scraper blade 33 to the soot particulate matter on its surface when sliding from top to bottom.
The through hole is internally embedded with a nest 6, and the nest 6 is provided with a through hole for the motor output shaft 11 to pass through and a reaming hole which is tightly assembled with the top end of the valve block 5. The nesting 6 and the upper plane of the valve plate 5 form a sealing surface, so that the leakage amount of a product can meet the design requirement.
The utility model discloses a section does not need any additional mechanism, direct output linear motion's brushless linear electric motor 1. Its advantages include: 1. the motor output shaft 11 directly outputs linear motion, a conversion mechanism is eliminated, and the win-win cost and reliability are achieved; 2. the motor output shaft 11 is combined with the original valve rod, namely, the original valve rod is replaced by the motor output shaft 11, so that the structure is further simplified, the cost is reduced, and the reliability is improved; 3. the spring seat 22 is fixed by adopting a wedge-shaped locking plate 21 form, so that the assembly is simple and the cost advantage is obvious; 4. the driving only needs a common H bridge, and is compatible with the existing general driving circuit.
The utility model discloses an actually carry out the use as follows.
After the brushless linear motor 1 is electrified, the output shaft 11 of the motor is driven to move up and down. When the motor output shaft 11 moves, the magnet on the motor output shaft 11 generates relative displacement relative to the hall position sensor 71, the hall position sensor 71 outputs an electric signal corresponding to the current relative position, the signal is fed back to the control chip, and a preset displacement-voltage signal can be output through programming, the control chip feeds the displacement signal of the motor output shaft 11 back to the engine ECU, the opening degree of the valve plate 5 is further judged effectively according to the displacement information of the motor output shaft 11, and then the engine ECU works according to the working condition set inside the engine ECU, and the intelligent degree is very high.
Because scraper blade 33's setting can realize the utility model discloses scrape motor output shaft 11 and get the operation in the use, can in time clear away particulate matters such as soot attached to on motor output shaft 11, not only ensure that the poppet valve can not block diely, can also prolong the life of poppet valve.
Claims (10)
1. A poppet valve driven by a brushless linear motor comprises a valve seat (4) with a hollow cavity inside, wherein an air inlet (41) and an air outlet (42) are formed in the valve seat (4); the method is characterized in that: the top end of the valve seat (4) is provided with a brushless linear motor (1), the brushless linear motor (1) comprises a motor shell (12) fixed with the top end of the valve seat (4) and a stator and a rotor which are respectively arranged in the motor shell (12), the rotor is fixedly connected with a motor output shaft (11) which penetrates through the motor shell (12) and movably penetrates through a hollow cavity of the valve seat (4) and is used for moving up and down under the driving of the brushless linear motor (1), and the bottom end of the motor output shaft (11) is provided with a valve plate (5) which is used for controlling the on-off between the air inlet (41) and the air outlet (42) under the up-and-down movement of the motor output shaft; the motor is characterized in that a position detection mechanism (7) for detecting the moving position of the motor output shaft (11) and a control chip for controlling the whole operation of the device are arranged in the motor shell (12), the signal output end of the position detection mechanism (7) is connected to the input end of the control chip, and the controlled end of the brushless linear motor (1) is connected to the output end of the control chip.
2. A poppet valve driven by a brushless linear motor as defined in claim 1, wherein: the position detection mechanism (7) comprises a position sensor, the position sensor and the control chip are both arranged on a PCB assembly (8) arranged at the top end of the inner wall of the motor casing (12), and the signal output end of the position sensor is connected to the input end of the control chip.
3. A poppet valve driven by a brushless linear motor as defined in claim 2, wherein: the position sensor is a Hall position sensor (71), a section of magnet is arranged on the outer wall of the motor output shaft (11) close to the Hall position sensor (71), and the signal output end of the Hall position sensor (71) is connected to the input end of the control chip.
4. A poppet valve driven by a brushless linear motor as defined in claim 1, wherein: the novel air valve is characterized in that a stepped hole (43) communicated with the air inlet (41) is formed in the valve seat (4), the stepped hole (43) comprises a first stepped hole, a second stepped hole and a third stepped hole which are sequentially formed in the valve seat (4) from top to bottom, and the air inlet (41) is communicated with the air outlet (42) through a through hole formed in the valve seat (4).
5. A brushless linear motor driven poppet valve as defined in claim 4, wherein: and a return structure (2) used for ensuring that the motor output shaft (11) and the valve plate (5) are restored to the original position after the brushless linear motor (1) is controlled to fail is arranged in the first step hole.
6. A brushless linear motor driven poppet valve as defined in claim 5, wherein: the return structure (2) comprises a wedge-shaped locking plate (21) fixedly arranged on the motor output shaft (11), a spring seat (22) buckled on the wedge-shaped locking plate (21) and a return spring (23) which is sleeved on the periphery of the motor output shaft (11), wherein one end of the return spring is fixedly arranged on the spring seat (22) and the other end of the return spring is fixedly arranged on the bottom wall of the first stepped hole.
7. A brushless linear motor driven poppet valve as defined in claim 4, wherein: and a sealing guide structure (3) which is used for playing a sealing role and guiding the motor output shaft (11) is arranged in the second step hole and the third step hole.
8. A brushless linear motor driven poppet valve as defined in claim 7, wherein: the sealing guide structure (3) comprises a sealing ring (31) which is embedded in the second stepped hole and used for preventing high-temperature gas from flowing upwards to avoid damage of the brushless linear motor (1) due to overhigh temperature and a guide sleeve (32) which is embedded in the second stepped hole and located under the sealing ring (31) and used for guiding the motor output shaft (11), the motor output shaft (11) penetrates through the sealing ring (31) and is in sliding sealing assembly with the sealing ring (31), and the motor output shaft (11) penetrates through the guide sleeve (32).
9. A brushless linear motor driven poppet valve as defined in claim 8, wherein: the guide sleeve (32) is in a step shape, the lower portion of the guide sleeve (32) is arranged in the third step hole and has a certain gap with the third step hole, a scraper (33) which penetrates through the gap between the third step hole and the guide sleeve (32) and is used for removing soot particles attached to the motor output shaft (11) when the motor output shaft (11) moves up and down is fixedly arranged on the guide sleeve (32) so as to ensure that the lift valve cannot be stuck, and the bottom of the scraper (33) is bent inwards and has a certain gap with the motor output shaft (11).
10. A brushless linear motor driven poppet valve as defined in claim 4, wherein: the through hole is internally embedded with a nest (6), and the nest (6) is provided with a through hole for the motor output shaft (11) to pass through and a reaming hole which is tightly assembled with the top end of the valve block (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921349587.1U CN210240594U (en) | 2019-08-20 | 2019-08-20 | Poppet valve driven by brushless linear motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921349587.1U CN210240594U (en) | 2019-08-20 | 2019-08-20 | Poppet valve driven by brushless linear motor |
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| Publication Number | Publication Date |
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| CN210240594U true CN210240594U (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921349587.1U Active CN210240594U (en) | 2019-08-20 | 2019-08-20 | Poppet valve driven by brushless linear motor |
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| CN (1) | CN210240594U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114673794A (en) * | 2022-04-11 | 2022-06-28 | 中国电子科技集团公司第三十八研究所 | Explosion-proof valve for hydrogen aerostat |
-
2019
- 2019-08-20 CN CN201921349587.1U patent/CN210240594U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114673794A (en) * | 2022-04-11 | 2022-06-28 | 中国电子科技集团公司第三十八研究所 | Explosion-proof valve for hydrogen aerostat |
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