CN213615796U - Transmission structure of valve seat grinding shaft - Google Patents
Transmission structure of valve seat grinding shaft Download PDFInfo
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- CN213615796U CN213615796U CN202022454877.1U CN202022454877U CN213615796U CN 213615796 U CN213615796 U CN 213615796U CN 202022454877 U CN202022454877 U CN 202022454877U CN 213615796 U CN213615796 U CN 213615796U
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Abstract
The utility model relates to a valve processing field, concretely relates to disk seat grinding spindle transmission structure. The transmission unit comprises a transmission main shaft and a transmission shaft, a fixing groove is formed in the transmission main shaft, one end of the transmission shaft is located in the fixing groove and coaxial with the transmission main shaft, a rectangular linear bearing is arranged between the transmission shaft and the transmission main shaft, and an inner hole of the rectangular linear bearing is rectangular. The utility model provides a disk seat grinding shaft transmission structure can make the disk seat be close to the ball core to reduce manual operation, reduce workman's work load, improve machining efficiency.
Description
Technical Field
The utility model relates to a valve processing field, concretely relates to disk seat grinding spindle transmission structure.
Background
The valve is a main control execution mechanism for medium circulation of the pipeline, and the medium in the pipeline can be adjusted, cut off and the like through the valve. The ball valve is used as one of valves, the leakage grade of the ball valve can reach VI grade or zero leakage, and the ball valve can be used in environments with severe working conditions, so that the ball valve is widely applied to the fields of petroleum, chemical industry, metallurgy, power plants, coal chemical industry and the like. The most key parts playing a sealing role in the ball valve are a ball core and valve seats, each ball valve comprises the ball core and the two valve seats, and the two valve seats are respectively positioned on two sides of the ball core and form two sealing pairs with the ball core to play a role in blocking media. When sealing, the surface of the ball core needs to be attached to the inner wall of the valve seat, the smaller the gap between the ball core and the valve seat is, the better the sealing effect of the ball valve is, and therefore the ball valve needs to be paired and ground with the ball core in the production process so as to ensure the attachment of the sealing surface of the ball core and the valve seat.
Traditional grinding mode is through the manual work with the disk seat according to pressing on the ball core, drive the ball core by other device and rotate, make appear relative rotation between ball core and the disk seat and realize, but to the ball valve that is arranged in large-scale apparatus or pipeline, the volume of ball core and disk seat is great, weight is heavier, manual operation's intensity is big, inefficiency, still appear easily if the rotatory in-process of ball core takes place to beat and off-centre, the workman presses the disk seat according to the pressure when on the ball core problem such as uneven, lead to the sealing performance variation of ball valve at last.
A ball core and valve seat lapping device is provided later, which comprises a clamping mechanism for clamping the ball core and the valve seat respectively, and the ball core and the valve seat are required to be rotated relatively when being paired and ground. However, the existing lapping equipment only enables the valve seat and the ball core to rotate relatively, and the pressure between the valve seat and the ball core is difficult to adjust in the grinding process, namely when the pressure between the valve seat and the ball core is too large, the adjustment is difficult, so that the condition of over-grinding between the ball core and the valve seat is easily caused. And the machining efficiency is reduced by adjusting the pressure between the valve seat and the ball core after the grinding is suspended.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a can make the disk seat be close to or keep away from the disk seat grinding spindle drive structure of ball core at the grinding in-process to avoid disk seat and ball core excessive grinding, and improve machining efficiency.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the valve seat grinding shaft transmission structure comprises a transmission unit, wherein the transmission unit comprises a transmission main shaft and a transmission shaft, a fixing groove is formed in the transmission main shaft, one end of the transmission shaft is located in the fixing groove and coaxial with the transmission main shaft, a rectangular linear bearing is arranged between the transmission shaft and the transmission main shaft, and an inner hole of the rectangular linear bearing is rectangular.
The beneficial effect of this scheme does:
1. during the device installation in this scheme, disk seat fixture is connected with the transmission shaft, can drive the transmission shaft when the transmission main shaft rotates and rotate to drive disk seat fixture and rotate, make the disk seat rotate for the ball core, need not the manual work and rotate the disk seat, reduce workman's work load, improve machining efficiency.
2. Different from traditional linear bearing, the hole among the rectangle linear bearing in this scheme is the rectangle, owing to adopted rectangle linear bearing and the flat square mode transmission moment of torsion of transmission shaft, the part receives very big bending force when having avoided transmission moment of torsion, and the swing that needs when making the disk seat grind receives the restriction with the removal, can lead to the part to take place to warp when the bending force is big to make the flexonics inefficacy.
The rectangular linear bearing is matched with the flat square of the transmission shaft in a rolling manner, so that the friction coefficient during movement is greatly reduced, the phenomena of large friction force, clamping stagnation and the like easily occurring during eccentricity caused by other movement modes such as sliding fit are effectively avoided, the upper valve seat and the lower valve seat can be better attached to the surface of the ball core during grinding, and the grinding quality is improved.
Further, the transmission shaft and the transmission main shaft are both vertically arranged.
The beneficial effect of this scheme does: the apparatus of lapping at transmission structure place in this scheme is vertical structure, the disk seat of disk seat fixture centre gripping is located the ball core of ball core fixture centre gripping promptly, lower both sides, in traditional horizontal structure, the disk seat is located the left and right both sides of ball core and compares, in this scheme, even ball core or disk seat are too big because of self weight, lead to skew or slope downwards, the center of ball core also still falls on the disk seat, can not take place horizontal skew, so can avoid leading to the cooperation precision between ball core and the disk seat to reduce because of ball core or disk seat skew, make the grinding precision of ball core and disk seat reduce.
Further, a strip-shaped groove is axially formed in the transmission main shaft, and a slip-off preventing pin connected with the strip-shaped groove in a sliding mode is fixed on the transmission shaft.
The beneficial effect of this scheme does: the anti-drop pin is matched with the strip-shaped groove, so that the transmission shaft can slide along the axial direction of the transmission main shaft and can rotate along with the transmission main shaft.
Further, the bar groove is equipped with two and two bar grooves and is located the transmission shaft both sides respectively.
The beneficial effect of this scheme does: two bar grooves are respectively located the both sides of axis of rotation and respectively with the both ends cooperation of anticreep round pin for when rotating the main shaft and driving the transmission shaft and rotate, the transmission shaft atress is even.
Furthermore, the section of the transmission shaft opposite to the rectangular linear bearing along the radial direction is rectangular.
The beneficial effect of this scheme does: transmission shaft and rectangle in this scheme, can be better with rectangle linear bearing's hole cooperation, rectangle linear bearing installs more conveniently, guarantees simultaneously that rectangle linear bearing can transmit the moment of torsion in step.
Furthermore, a clamping mechanism base is sleeved outside the transmission main shaft, and the transmission main shaft is rotatably connected with the clamping mechanism base.
The beneficial effect of this scheme does: the fixture base is connected with the transmission main shaft, and when the transmission structure in this scheme is installed in the research equipment, the fixture base is installed on the lathe bed, so can install the transmission shaft on the fixture base before the research equipment is assembled, reduce the work load when the research equipment is assembled.
Further, a rolling bearing is arranged between the transmission main shaft and the clamping mechanism base.
The beneficial effect of this scheme does: the roller bearing plays a supporting role for the transmission main shaft, and the abrasion of the transmission main shaft caused by the friction between the transmission main shaft and the clamping mechanism base when the transmission main shaft rotates is avoided.
Furthermore, the transmission units are provided with two transmission units which are arranged up and down symmetrically along the horizontal plane.
The beneficial effect of this scheme does: two drive unit all can connect disk seat fixture, so when grinding, two disk seat fixture all can the centre gripping disk seat, two disk seats can respectively with the upper and lower both ends cooperation of ball core, grind two disk seats simultaneously, further improve machining efficiency.
Further, a lead screw parallel to the transmission main shaft is arranged on the clamping mechanism base and penetrates through the clamping mechanism base and is in threaded connection with the clamping mechanism base.
The beneficial effect of this scheme does: the lead screw and the clamping mechanism base form a ball screw pair, and when the clamping mechanism base needs to be adjusted, the lead screw is driven to rotate, so that the clamping mechanism base can be rapidly slid.
Furthermore, the transmission main shaft is connected with a driving piece, the driving piece is used for driving the transmission main shaft to rotate, and the driving piece is connected with a sensor used for detecting the torque of the driving piece or the transmission main shaft.
The beneficial effect of this scheme does: the sensor detectable driving piece in this scheme or the moment of torsion of transmission main shaft for the moment of torsion change when the workman can observe the disk seat and grind avoids the burst problem can not in time discover and lead to the damage of ball core disk seat.
Drawings
Fig. 1 is a vertical sectional view of a transmission unit in embodiment 1 of the present invention;
fig. 2 is a vertical cross-sectional view of a fixture base in embodiment 2 of the present invention;
FIG. 3 is a left side view of FIG. 2;
fig. 4 is a vertical sectional view of embodiment 3 of the present invention;
fig. 5 is a left side view of embodiment 4 of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the clamping mechanism comprises a clamping mechanism base 1, a cylindrical roller bearing 11, a bearing positioning sleeve 12, a transmission main shaft 2, a strip-shaped groove 21, a driven belt pulley 22, a transmission shaft 3, an anti-drop pin 31, a rectangular linear bearing 4, a lead screw 5, a motor 51, a valve seat variable frequency motor 6, a driving belt pulley 61, a torque sensor 62, a connecting rod 63 and a ball core clamping mechanism 7.
Example 1
Valve seat grinds axle transmission structure, as shown in fig. 1, including a transmission unit, transmission unit is including equal vertical transmission main shaft 2 and the transmission shaft 3 that sets up, be equipped with opening fixed slot up in the transmission main shaft 2, 3 lower extremes of transmission shaft are located the fixed slot, 3 lower extremes of transmission shaft transversely are equipped with the through-hole, interference fit has anticreep round pin 31 in the through-hole, the lateral wall all is equipped with bar groove 21 about the fixed slot, bar groove 21 is along the axial extension of transmission main shaft 2, both ends are located about anticreep round pin 31 respectively two bar grooves 21, anticreep round pin 31 can be along the vertical slip of bar groove 21.
A rectangular linear bearing 4 is arranged above the anti-falling pin 31, the section of the inner hole of the rectangular linear bearing 4 and the section of the transmission shaft 3 along the horizontal direction in the embodiment are rectangular, and the rectangular linear bearing 4 is positioned between the transmission shaft 3 and the transmission main shaft 2. The inner ring and the outer ring of the rectangular linear bearing 4 are in interference fit with the transmission shaft 3 and the inner wall of the fixed groove respectively.
After the transmission structure in this embodiment is assembled, 3 upper ends of transmission shaft are connected with from the centering chuck that is used for the centre gripping disk seat, and when drive transmission main shaft 2 rotated, transmission main shaft 2 drove rectangle linear bearing 4 and rotates, then drove transmission shaft 3 and rotate for the disk seat from the centering chuck rotates for the ball core.
And in the grinding process, when the valve seat moves along the axial direction of the transmission shaft 3, the transmission shaft 3 slides axially relative to the transmission main shaft 2, and at the moment, the anti-drop pin 31 vertically slides along the strip-shaped groove 21 to limit the sliding distance of the transmission shaft 3, so that the inner ring and the outer ring of the rectangular linear bearing 4 are prevented from dropping.
Example 2
On the basis of embodiment 1, as shown in fig. 2 and 3, a clamping mechanism base 1 is sleeved outside a transmission main shaft 2 in this embodiment, the transmission main shaft 2 in this embodiment vertically penetrates through the clamping mechanism base 1 and is coaxial with the clamping mechanism base 1, a bearing positioning sleeve 12 and two rolling bearings are arranged between the transmission main shaft 2 and the clamping mechanism base 1, the two rolling bearings are respectively located at two sides of the bearing positioning sleeve 12, specifically, the rolling bearings in this embodiment are cylindrical roller bearings 11, and the bearing positioning sleeve 12 is a cylindrical roller bearing positioning sleeve. Specifically, the installation manners of the cylindrical roller bearing and the cylindrical roller positioning sleeve in this embodiment are the same as those in the prior art, and are not described again in this embodiment.
The left end of fixture base 1 is equipped with lead screw 5, and lead screw 5 vertically runs through fixture base 1 and with fixture base 1 screw-thread fit, constitutes ball screw pair between lead screw 5 and the fixture base 1 in this embodiment, and the lower extreme of lead screw 5 has motor 51 through the coupling joint.
The lower extreme of transmission main shaft 2 is connected with driven pulley 22 through the parallel key, and the right-hand member of fixture base 1 has the driving piece through the bolt fastening, and the driving piece in this embodiment adopts disk seat inverter motor 6, and disk seat inverter motor 6 has drive pulley 61 through the coupling joint, is equipped with the belt between driven pulley 22 and the drive pulley 61.
The specific implementation process is as follows:
when the valve seat needs to rotate relative to the ball core, the valve seat variable frequency motor 6 is manually started, the valve seat variable frequency motor 6 drives the driven belt pulley 22 to rotate through the driving belt pulley 61, the transmission main shaft 2 is made to rotate, the transmission shaft 3 is driven to rotate through the anti-falling pin 31 and the rectangular linear bearing 4 when the transmission main shaft 2 rotates, the torque of the transmission shaft 3 is finally transmitted to the valve seat, and the valve seat rotates relative to the ball core.
When the valve seat needs to be close to or far away from the ball core, the motor 51 is started, the motor 51 drives the screw 5 to rotate, and the clamping mechanism base 1 is connected with the transmission main shaft 2, so that the transmission main shaft 2 can play a positioning role for the clamping mechanism base 1 at the moment, and the screw 5 rotates to drive the clamping mechanism base 1 to vertically slide.
Example 3
On the basis of embodiment 2, as shown in fig. 4, the transmission structure in this embodiment includes two transmission units, and the two transmission units are respectively located at the upper and lower sides of the ball core clamping mechanism 7 of the research and development equipment and are arranged vertically and symmetrically along the ball core clamping mechanism 7. Two transmission units in this embodiment can be connected with a disk seat fixture respectively to once can grind two disk seats, can further improve grinding efficiency.
Example 4
On the basis of embodiment 3, as shown in fig. 5, sensors are respectively sleeved on the output shafts of the two driving members in this embodiment, the sensor in this embodiment is a torque sensor 62, the connection between the torque sensor 62 and the output shaft in this embodiment is the same as that in the prior art, and details are not repeated in this embodiment. A connecting rod 63 is arranged in front of the torque sensor 62 and the clamping mechanism base 1, and two ends of the connecting rod 63 are respectively fixed on the clamping mechanism base 1 and the torque sensor 62 through bolts.
In the working process of the driving piece in the embodiment, the torque sensor 62 continuously monitors the torque of the driving piece, a worker can observe the torque change of the valve seat during grinding, and the damage to the ball core and the valve seat caused by the fact that sudden unexpected problems cannot be found timely is avoided.
The above description is only an example of the present invention, and the detailed technical solutions and/or characteristics known in the solutions are not described too much here. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. Valve seat grinds axle transmission structure, its characterized in that: the transmission unit comprises a transmission main shaft and a transmission shaft, a fixing groove is formed in the transmission main shaft, one end of the transmission shaft is located in the fixing groove and coaxial with the transmission main shaft, a rectangular linear bearing is arranged between the transmission shaft and the transmission main shaft, and an inner hole of the rectangular linear bearing is rectangular.
2. The valve seat grinding shaft transmission structure according to claim 1, wherein: the transmission shaft and the transmission main shaft are both vertically arranged.
3. The valve seat grinding shaft transmission structure according to claim 2, wherein: a strip-shaped groove is axially formed in the transmission main shaft, and an anti-dropping pin connected with the strip-shaped groove in a sliding mode is fixed on the transmission shaft.
4. The valve seat grinding shaft transmission structure according to claim 3, wherein: the bar groove is equipped with two and two bar grooves and is located the transmission shaft both sides respectively.
5. The valve seat grinding shaft transmission structure according to claim 2, wherein: the section of the transmission shaft opposite to the rectangular linear bearing along the radial direction is rectangular.
6. The valve seat grinding shaft transmission structure according to claim 1, wherein: the transmission main shaft is sleeved with a clamping mechanism base, and the transmission main shaft is rotatably connected with the clamping mechanism base.
7. The valve seat grinding shaft transmission structure according to claim 6, wherein: and a rolling bearing is arranged between the transmission main shaft and the clamping mechanism base.
8. The valve seat grinding shaft transmission structure according to claim 2, wherein: the transmission units are provided with two transmission units which are arranged up and down symmetrically along a horizontal plane.
9. The valve seat grinding shaft transmission structure according to claim 6, wherein: the clamping mechanism base is provided with a lead screw parallel to the transmission main shaft, and the lead screw penetrates through the clamping mechanism base and is in threaded connection with the clamping mechanism base.
10. The valve seat grinding shaft transmission structure according to claim 1, wherein: the transmission main shaft is connected with a driving piece, the driving piece is used for driving the transmission main shaft to rotate, and the driving piece is connected with a sensor used for detecting the torque of the driving piece or the transmission main shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022454877.1U CN213615796U (en) | 2020-10-28 | 2020-10-28 | Transmission structure of valve seat grinding shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022454877.1U CN213615796U (en) | 2020-10-28 | 2020-10-28 | Transmission structure of valve seat grinding shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213615796U true CN213615796U (en) | 2021-07-06 |
Family
ID=76626987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022454877.1U Active CN213615796U (en) | 2020-10-28 | 2020-10-28 | Transmission structure of valve seat grinding shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213615796U (en) |
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2020
- 2020-10-28 CN CN202022454877.1U patent/CN213615796U/en active Active
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