CN211038861U

CN211038861U - Disc type EGR valve with clamp spring for torque motor

Info

Publication number: CN211038861U
Application number: CN201922379594.2U
Authority: CN
Inventors: 施爱峰
Original assignee: Wuxi Longsheng Technology Co Ltd
Current assignee: Wuxi Longsheng Technology Co Ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-07-17
Anticipated expiration: 2029-12-26

Abstract

The utility model discloses a disk formula EGR valve of torque motor area jump ring, including disk seat, axis of rotation and the torque motor of axis of rotation upper end connection, the video disc is connected to the axis of rotation lower extreme, is provided with the jump ring on the outer lane of video disc, and the inner diameter sealing joint of the outer lane of jump ring and the bush that the disk seat below set up is provided with the copper sheathing in the middle of the disk seat, and the lower extreme of copper sheathing is provided with the metal mesh grid, and the upper end of copper sheathing is the oil blanket, and the upper end of oil blanket is the bearing, is provided with the torsional spring between torque. An upper connecting block and a lower connecting block are further arranged between the torque motor and the rotating shaft, and an adjusting block is arranged between the upper connecting block and the lower connecting block. The butterfly valve has small leakage amount, and the torque motor shaft is flexibly connected with the rotating shaft, so that the transmission efficiency is improved.

Description

Disc type EGR valve with clamp spring for torque motor

Technical Field

The utility model relates to a diesel engine exhaust gas recirculation system belongs to engine exhaust gas recirculation system controlling means technical field.

Background

Exhaust Gas Recirculation (EGR), which is short for EGR, is the process of returning a small portion of the Exhaust Gas produced by a diesel or gasoline engine to the cylinder. The recirculated exhaust gas will retard the combustion process due to its inertness, i.e. the combustion speed will be slowed down and the pressure build-up process in the combustion chamber will be slowed down, which is the main reason for the reduction of nitrogen oxides. In addition, increasing the exhaust gas recirculation rate reduces the total exhaust gas flow (mass flow) and therefore the total pollutant output in the exhaust gas emissions will be relatively reduced.

Electric EGR can reintroduce a proper amount of engine combustion exhaust gas into the air inlet pipe, and the exhaust gas is mixed with fresh air and then enters an engine cylinder for secondary combustion, so that the combustion temperature in the cylinder is reduced, the generation and discharge amount of nitrogen oxides are reduced, and the electric EGR is generally arranged between an exhaust manifold and an air inlet manifold. With the upgrade of the national six-emission route, a medium-heavy diesel engine also needs to be provided with an EGR valve to introduce exhaust gas to participate in recirculation, and in order to achieve emission, the valve port diameter of the EGR valve is large, otherwise, the requirement on the flow rate of the exhaust gas cannot be met.

The butterfly type EGR valve rotates when moving, and only friction force needs to be overcome during use; in addition, a medium-heavy engine also provides higher requirements for the service life of the EGR valve, the service life of a brush motor used in the prior art cannot be met due to the problems of reversing and carbon brushes, so the motor used in the invention is a torque motor which is a brushless motor, and a butterfly valve is difficult to popularize and use due to poor leakage.

Disclosure of Invention

The utility model aims to solve the technical problem that a can solve the butterfly valve and let out disc formula EGR valve of torque motor area jump ring of leakage volume.

The technical scheme of the utility model is that:

the utility model provides a disk formula EGR valve of torque motor area jump ring, includes disk seat, axis of rotation, and the torque motor who is connected on the axis of rotation, and the video disc is connected to the axis of rotation lower extreme, is provided with the jump ring on the outer lane of video disc, and the outer lane of jump ring and the sealed joint of the internal diameter of the bush that sets up below the disk seat are provided with the copper sheathing in the middle of the disk seat, and the lower extreme of copper sheathing is provided with metal mesh grid, and the upper end of copper sheathing is the oil blanket, and the upper end of oil blanket is the bearing.

An upper connecting block and a lower connecting block are further arranged between the torque motor and the rotating shaft, and an adjusting block is arranged between the upper connecting block and the lower connecting block.

A stainless steel bushing is arranged in the valve body channel, the valve seat is made of aluminum, and the bushing is connected with the valve body in a casting mode. The inner surface of the bushing is finished.

The utility model has the advantages that:

1. the full-closed leakage quantity of the EGR valve is good. When the EGR valve is fully closed, the clamp spring in the disc is in contact with the bushing, and when exhaust gas passes through the exhaust gas leakage device, the exhaust gas can be leaked out through the gap between the clamp spring and the bushing. Because the clamp spring is of an annular structure, the arc chamfer angle is designed on the edge, when the clamp spring is not disconnected, the outer diameter of the clamp spring is in interference fit with the inner diameter of the lining, after the clamp spring is disconnected, the clamp spring can be assembled in the disc, and the groove of the disc can accommodate the clamp spring and has adjustable space. After the valve body is assembled, the clamp spring has elasticity and can contact the bushing, and after the clamp spring rotates, the magnitude of interference between the clamp spring and the bushing can be adjusted through the fracture.

2. The axial leakage amount is good. Axial leakage refers to exhaust gas flowing to the cavity in the axial direction. The metal mesh grid is used for filtering carbon particles, then is filled into a copper bush to serve as a rotating shaft auxiliary support, then is turned into an oil seal, the oil seal is structurally characterized by comprising an upper seal and a lower seal, the two seals are used for ensuring the reliability of the seals, and finally is filled into a needle bearing to serve as a main support of the rotating shaft.

3. The torque motor shaft is non-rigidly connected with the rotating shaft. The torque motor provides torque force, the lower rotating shaft is in a disengaged state, the possibility of decentration exists, how to realize force transmission is realized, and the torque motor is not rigidly connected. Therefore, the torque motor shaft is flexibly connected with the rotating shaft, and the transmission efficiency is improved.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the adjusting block, the upper connecting block and the lower connecting block of the present invention;

FIG. 3 is a schematic view of the circlip sealing form of the present invention;

FIG. 4 is a left side view of FIG. 3;

FIG. 5 is a schematic view of a clamp spring;

fig. 6 is a schematic view of an oil seal.

In the figure: 1-torque motor, 2-upper connecting block, 3-sealing ring, 4-adjusting block, 5-lower connecting block, 6-torsion spring, 7-oil seal, 8-copper sleeve, 9-valve seat, 10-bushing, 11-disc, 12-snap spring, 13-screw, 14-bearing, 15-lining, 16-retainer ring, 17-metal woven mesh, 18-rotating shaft, 24-gap between adjusting block and lower connecting block in left and right direction.

Detailed Description

The invention is further described with reference to the following specific drawings and examples.

The utility model provides a disk formula EGR valve of torque motor area jump ring, including disk seat 9, axis of rotation 18, torque motor 1 with the connection of axis of rotation 18 upper end, disc 11 is connected to axis of rotation 18 lower extreme, be provided with jump ring 12 on the outer lane of disc 11, the sealed joint of the inner diameter of the outer lane of jump ring 12 and the bush 10 that sets up below disk seat 9, be provided with copper sheathing 8 in the middle of the disk seat 9, the lower extreme of copper sheathing 8 is provided with metal mesh grid 17, the upper end of copper sheathing 8 is oil blanket 7, the upper end of oil blanket 7 is bearing 14, be provided with torsional spring 6 between torque motor 1 and the disk seat 9.

An upper connecting block 2 and a lower connecting block 5 are further arranged between the torque motor 1 and the rotating shaft 18, and an adjusting block 4 is arranged between the upper connecting block 2 and the lower connecting block 5.

An inner liner 15 is provided between the inner race of the upper end bearing 14 of the oil seal 7 and the rotating shaft 18.

The utility model discloses a disc formula EGR valve of torque motor area jump ring, torque motor 1 regard as the power supply, and direct drive axis of rotation 18 rotates, and disc 11 also directly assembles in axis of rotation 18 to realize torque motor's the transmission of torsional force. The torque motor is characterized by a rotation of 0-90 degrees, and within 0-10 degrees, 80-90 degrees, the motor driving force is small, so that the best motion is within 10-80 degrees.

A double seal (see the schematic diagram of fig. 6), wherein the oil seal 7 has two sealing functions in the axial direction, the first seal between the oil seal 7 and the rotating shaft 18 is used for sealing gas, and the second seal between the oil seal 7 and the rotating shaft 18 is used for sealing gas possibly leaked out and lubricating grease of the bearing 14; in order to ensure that the rotating shaft 18 has limited movement in the axial direction, the lower end of the copper sleeve 8 is provided with a retainer ring 16, the lower end of the rotating shaft 18 is provided with a disc 11, the rotating shaft 18 is provided with a groove, the retainer ring 16 is clamped in the groove, and then the copper sleeve 8 presses the retainer ring 16 during assembly; to ensure smooth rotation of the rotating shaft 18, the upper bearing 14 and the lower copper sleeve 8 are required to support.

Torque motor 1, its principle is four permanent magnetism magnetic poles, also is the rotor, receiving 4 coils, under stator magnetic field interact promptly, produces the rotation torque, and the drive rotor is rotatory. After the power is switched on, the coil generates magnetism, the coil and the four permanent magnetic poles generate a moment effect to drive the motor to rotate, the coil is not in contact with the rotor inside the torque motor, so that the service life of the motor can be prolonged, in addition, a Hall chip is arranged inside the motor, and the rotating angle of the motor can be accurately known through the change of a magnetic field generated by rotation.

The utility model discloses an go up connecting block 2, adjusting block 4, lower connecting block 5 for the condition of the decentraction of adjusting torque motor 1 and axis of rotation 18. Go up connecting block 2 and fixed with torque motor 1 through the welded mode, lower connecting block 5 also is fixed through the welded mode with axle 18, and the clearance 24 that direction exists about adjusting block and the lower connecting block can be when the assembly, through adjusting block 4, adjust the condition of connecting block and lower connecting block decentraction.

The utility model discloses an axial seal, the preferential metal mesh grid 17 of packing into of lower extreme, its purpose is for filtering the carbon granule, and the effect of copper sheathing 8 is the effect of bearing, is used for supporting the rotation axis 18 rotation, and oil blanket 7 is packed into again, and its purpose prevents to have the soot to scurry into the bearing in, pollutes the grease, packs into bearing 14 at last.

The utility model discloses a take video disc 11 of jump ring 12 is the sealed key place of this invention, and there is a groove in the middle of video disc 11 for placing jump ring 12, wherein has a breach in the middle of jump ring 12 circumference. The outer diameter of the disc 11 is smaller than the inner diameter of the stainless steel bushing 10, and the outer diameter of the circlip 12 when not disconnected is the same as the inner diameter of the stainless steel bushing 10.

Claims

1. The utility model provides a disc formula EGR valve of moment of torsion motor area jump ring, includes valve seat (9), axis of rotation (18) and torque motor (1) that axis of rotation (18) upper end is connected, its characterized in that: disc (11) is connected to axis of rotation (18) lower extreme, be provided with jump ring (12) on the outer lane of disc (11), the sealed joint of the inner diameter of the outer lane of jump ring (12) and bush (10) that disk seat (9) below set up, be provided with copper sheathing (8) in the middle of disk seat (9), the lower extreme of copper sheathing (8) is provided with metal mesh grid (17), the upper end of copper sheathing (8) is oil blanket (7), the upper end of oil blanket (7) is bearing (14), is provided with torsional spring (6) between torque motor (1) and disk seat (9).

2. The disc type EGR valve with the clamp spring of the torque motor as claimed in claim 1, wherein: an upper connecting block (2) and a lower connecting block (5) are further arranged between the torque motor (1) and the rotating shaft (18), and an adjusting block (4) is arranged between the upper connecting block (2) and the lower connecting block (5).

3. The disc type EGR valve with the clamp spring of the torque motor as claimed in claim 1, wherein: and a lining (15) is arranged between the inner ring of the upper end bearing (14) of the oil seal (7) and the rotating shaft (18).