CN202971784U - Screw rod driving mechanism for microscale plunger pump - Google Patents
Screw rod driving mechanism for microscale plunger pump Download PDFInfo
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- CN202971784U CN202971784U CN 201220634291 CN201220634291U CN202971784U CN 202971784 U CN202971784 U CN 202971784U CN 201220634291 CN201220634291 CN 201220634291 CN 201220634291 U CN201220634291 U CN 201220634291U CN 202971784 U CN202971784 U CN 202971784U
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- driving mechanism
- rod driving
- nut
- plunger pump
- driveshaft
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Abstract
The utility model relates to a screw rod driving mechanism for a microscale plunger pump which is an important component in an analyzer. A nut driving rod is sleeved on a screw rod of the screw rod driving mechanism, is provided with a rotation-preventing location pin, and is arranged in a slide sleeve. The slide sleeve is arranged outside the nut driving rod and provided with a plurality of engine oil backflow grooves. Two ends of the screw rod driving mechanism are respectively provided with a right end sealing ring and a left end sealing ring. According to the screw rod driving mechanism, an existing screw rod driving mechanism is improved, a photoelectricity detector for locating is arranged outside the driving mechanism, the whole screw rod driving mechanism is sealed, an oil storage space is increased, common engine oil is used for lubrication, and engine oil automatic circulation is realized, thus, lubricating effect is improved, abrasion on the screw rod driving mechanism can be reduced, and service life is prolonged, meanwhile, the mechanism does not need detaching for maintenance in service life, and only engine oil inside the mechanism needs replacing at necessary time.
Description
Technical field
The utility model relates to the bolt rod driving mechanism of the important devices Microscale plunger pump in a kind of ANALYZER.
Background technique
For detection of the chromatographic analysis quasi-instrument of analyzing, it is light, mechanical, electrical integrated instrument, mainly by infusion pump, the compositions such as liquid control valve, chromatography column, ultraviolet chromatographic detector, circuit control panel and control and analysis software, wherein, Microscale plunger pump is one of them vitals, and it must be controlled flow is accurate, usually its flow is in 2ml per minute left and right, and the pressure operating range is at 1.5-10MPa.Its technical performance is also one of basic mechanical design feature of ANALYZER.
Detect in chromatogram the micro-high-pressure service pump that generally uses in ANALYZER at present, adopt plunger pump more, driving mode has cam, eccentric wheel and bolt rod driving mode etc., and due to the bolt rod driving mode, volume is smaller, and certain utilization rate is arranged.Because should trace high-pressure service pump pressure high, cause and bear very large pressure on drive screw, the engineering plastics of most selflubricatings, can not bear so high pressure, the bolt rod driving mechanism that uses at present, how to make screw rod and nut with steel and brass, bronze, because wherein also must realize accurate location with photoelectric detector, can only use grease lubrication.
It is the sectional view of existing bolt rod driving Microscale plunger pump as Fig. 1; As can be seen from Figure 1, because photoelectric detector 5 and move left and right locating stud 6, be contained in the bolt and nut actuator chamber, in order to allow the light of photoelectric detector pass through smoothly, machine oil can not be poured at this position, so this internal system can not seal, more full-bodied lubricating grease have to be adopted, lubricating grease is difficult for nature and flows to the bolt and nut Surface of action, and lubrication effect is undesirable.Such shortcoming is just old lubricating grease to be wiped clean by hand oiling additional new lubricating grease through operation after a while.And this process must take bolt rod driving mechanism apart and carry out, and wastes time and energy, and is very inconvenient.
Summary of the invention
The purpose of this utility model is to solve above-mentioned the deficiencies in the prior art, a kind of bolt rod driving mechanism for Microscale plunger pump is proposed, on the screw rod 11 of bolt rod driving mechanism, cover has nut driveshaft 10, anti-rotation locating stud 8 is installed on nut driveshaft 10, its characteristics are, described nut driveshaft 10 is arranged in the outer sliding sleeve 9 of the nut driveshaft that is provided with some band organic oil back flashes 13, and the two ends of bolt rod driving mechanism are respectively equipped with right-hand member seal ring 16 and left end seal ring 24.
Above-mentioned screw rod 11 is coaxial with stepper motor 12.
Above-mentioned right-hand member seal ring 16 and left end seal ring 24 are U-shaped cross sections.
Above-mentioned right-hand member seal ring 16 and left end seal ring 24 are seal rings made from the engineering plastics of selflubricating.
Outer sliding sleeve 9 tops of above-mentioned nut driveshaft are provided with top accumulator 15, nut driveshaft outer sliding sleeve 9 bottoms and are provided with bottom accumulator 21, are connected with bottom accumulator 21 by through hole 20.
But be provided with nut driveshaft left side cavity 4, nut driveshaft the right cavity 19 of oil storage in above-mentioned bolt rod driving mechanism.
Above-mentioned top accumulator 15 is provided with oil hole, and bottom accumulator 21 is provided with oil drainage hole; Described oil hole and oil drainage hole are separately installed with screw and gasket seal 14.
Be provided with the stock screw 25 of oil-feed deep hole 26 and front end band seal ring in the accumulator of top.
Further, the utility model proposes a kind of Microscale plunger pump that adopts above-mentioned bolt rod driving mechanism, its characteristics are, at the right-hand member of stepping motor rotating shaft 17, grating 18 and the photoelectric detector 5 of controlling nut driveshaft 10 and plunger pump piston 3 displacement amounts are installed.
Described grating 18 can accurately be controlled the motor angle of swing, and the length of contrast available technology adopting take millimeter as unit is controlled displacement amount, and precision is further enhanced.
The utility model is the improvement for above-mentioned existing bolt rod driving mechanism, and the photoelectric detector of location use is arranged on the driving mechanism outside, and whole bolt rod driving mechanism is sealed, increase oil storage space, used regular engine oil lubricated, realized the machine oil automatic cycle, like this, improve lubrication effect, can reduce the wearing and tearing of bolt rod driving mechanism, life-saving, simultaneously, in lifetime, do not need to take mechanism apart and maintain, in case of necessity, a machine oil that needs to change the inside gets final product.
In order to improve the working life of seal ring, increased oil-feed deep hole and a piston type sealing push rod in oil storage space, can make the air compressing of oil storage space, making cross section is that U-shaped seal ring produces radial pressure.Because of wearing and tearing, when seal degree descends to some extent, sealed screw is replaced by sealed screw with piston push rod after seal ring uses a period of time, can improves the pressure of oil storage space, the seal ring life-span can extend 1 times of left and right.
Description of drawings
Fig. 1 is the sectional view of existing bolt rod driving Microscale plunger pump.
Fig. 2 is the sectional view of the utility model bolt rod driving mechanism for implementing example 1.
Fig. 3 is the sectional view of the utility model bolt rod driving mechanism for implementing example 2.
Fig. 4 is the partial enlarged drawing of A section in Fig. 3.
In figure:
1, one-way valve, 2, pipe joint, 3, plunger pump piston, 4, nut driveshaft left side cavity, 5, photoelectric detector, 6, move left and right locating stud, 7, the slip locating slot, 8, anti-rotation locating stud, 9, the sliding sleeve that the nut driveshaft is outer, 10, the nut driveshaft, 11, be connected to the screw rod on motor shaft, 12, stepper motor, 13, the machine oil back flash, 14, screw and gasket seal, 15, the top accumulator, 16, the right-hand member seal ring, 17, stepping motor rotating shaft, 18, grating, 19, the right cavity of nut driveshaft, 20, through hole, 21, the bottom accumulator, 22, nut driveshaft cavity, 23, shell, 24, the left end seal ring, 25, the stock screw of front end band seal ring, 26, the oil-feed deep hole, 27, screw thread, 28, seal ring.
Embodiment
Below in conjunction with accompanying drawing, specific embodiments of the present utility model is described in detail.
It is the sectional view of the utility model bolt rod driving mechanism for implementing example 1 as Fig. 2.The left side is plunger pump, and the right side is stepper motor, and the centre is bolt rod driving mechanism generalized section.
In figure, plunger pump, bolt rod driving mechanism, the coaxial installation of stepper motor 12.One-way valve 1, pipe joint 2 structures of plunger pump are constant, screw rod 11 is arranged on stepper motor 12 axles, perhaps the motor shaft front end is processed into screw thread, on screw rod, cover has nut driveshaft 10, anti-rotation locating stud 8 is installed on nut driveshaft 10, make screw rod when rotating forward or backwards, in can only the sliding sleeve 9 outside the nut driveshaft, slip locating slot 7 is housed along the outside to be moved left and right, under the effect of motor at driving current, ceaselessly forward, counter-rotating, the nut driveshaft moves left and right, and just drives plunger pump piston fixed thereon 3 to-and-fro motion.
Also have several machine oil back flashes 13 on sliding sleeve 9 outside the nut driveshaft; when the nut driveshaft moves left and right; because cavity machine oil flows in back flash; promoted oil circulation; because the machine oil back flash all is positioned at bottom accumulator 21 tops, therefore the metal particle that is produced by abrasion can be deposited on the bottom of bottom accumulator 21.
In driving mechanism, but nut driveshaft left side cavity 4, the right cavity 19 of nut driveshaft, top accumulator 15, the equal oil storage of bottom accumulator 21.
Right-hand member seal ring 16 and left end seal ring 24 are seal rings made from the engineering plastics of selflubricating.
The right-hand member of stepping motor rotating shaft 17 has been installed grating 18 and photoelectric detector 5, together with control circuit, can accurately control the motor angle of swing, has also just controlled the displacement amount of nut driveshaft 10 and plunger pump piston 3.
During use, add about 2/3rds machine oil in accumulator, when nut driveshaft 10 is moved to the left, the volume of nut driveshaft left side cavity 4, nut driveshaft cavity 22 becomes large simultaneously, the volume of the right cavity 19 of nut driveshaft diminishes, and machine oil flows to the right cavity 19 of nut driveshaft by back flash 13, through hole 20, top accumulator 15, bottom accumulator 21.When nut driveshaft 10 moved right, machine oil flowed in the opposite direction.
Like this, just realized the automatic cycle of machine oil, having guaranteed has enough machine oil in bolt rod driving mechanism, simultaneously, the metal particle that wearing and tearing produce by through hole 20 can autodepositions in the bottom of bottom accumulator 21.Can effectively improve the life-span of bolt rod driving mechanism.
More during change engine oil, first open screw and the gasket seal 14 on top, then open following screw 14 and just can discharge used oil, the screw 14 of bottom is screwed on, after adding appropriate new machine oil, screw and the gasket seal 14 of twisting good top get final product.
Be the sectional view of the utility model bolt rod driving mechanism for implementing example 2 as Fig. 3, its structure is most of identical with Fig. 2 of embodiment 1, but the top oil storage space has increased an oil-feed deep hole 26, seals the top oilhole with the stock screw 25 of front end band seal ring.Referring to the A section partial enlarged drawing of Fig. 4, figure housing 23, screw thread 27, seal ring 28.
Right-hand member seal ring 16, left end seal ring 24 add man-hour, make its external diameter be slightly larger than the cavity of placing seal ring, internal diameter is slightly less than plunger and screw rod, like this, after installation, seal ring can produce suitable tension force, can keep good sealing, use the most of the time at this device, salable good, the top oil inlet hole seals with normal screws and gasket seal 14.But the prolongation along with the spreadable life, right-hand member seal ring 16 and left end seal ring 24 intermediary movements parts are because of sliding friction, still some wearing and tearing, make sealing tension force descend, during this time, the stock screw 25 that the normal screws 14 of upper end can be changed into front end band seal ring seals the top oilhole, when it is down installed, piston is downward, air in compressible accumulator makes the accumulator internal pressure rise, and is delivered on the U-shaped cross section of right-hand member seal ring 16 and left end seal ring 24, make seal ring that enough sealing radial pressures can be arranged, can keep good sealing.
The bolt rod driving mechanism of the utility model Microscale plunger pump is the improvement for existing bolt rod driving mechanism, increased oil storage space, use regular engine oil, realize the machine oil automatic cycle, improved lubrication effect, can reduce the wearing and tearing of bolt rod driving mechanism, life-saving in lifetime, does not need to take mechanism apart and maintains, in case of necessity, a machine oil that needs to change the inside gets final product.Also increase a stock screw with seal ring, can form suitable pressure at accumulator, kept the radial pressure of seal ring, can extend the working life of seal ring.
Further, the life-span of this bolt rod driving mechanism depends on that the thread abrasion of bolt and nut and the wearing and tearing of seal ring make seal failure, stock screw 25 with front end band seal ring comes the sealed upper end oilhole, can make the life-span of seal ring greater than the wear-out life of screw thread, in lifetime, need not change seal ring 28.
Claims (9)
1. bolt rod driving mechanism that is used for Microscale plunger pump, the upper cover of the screw rod of bolt rod driving mechanism (11) has nut driveshaft (10), anti-rotation locating stud (8) is installed on nut driveshaft (10), it is characterized in that, described nut driveshaft (10) is arranged in the outer sliding sleeve (9) of the nut driveshaft that is provided with some band organic oil back flashes (13), and the two ends of bolt rod driving mechanism are respectively equipped with right-hand member seal ring (16) and left end seal ring (24).
2. a kind of bolt rod driving mechanism for Microscale plunger pump according to claim 1, is characterized in that, described screw rod (11) is coaxial with stepper motor (12).
3. a kind of bolt rod driving mechanism for Microscale plunger pump according to claim 1, is characterized in that, described right-hand member seal ring (16) and left end seal ring (24) are U-shaped cross sections.
4. according to claim 1 or 3 described a kind of bolt rod driving mechanisms for Microscale plunger pump, is characterized in that, described right-hand member seal ring (16) and left end seal ring (24) are the seal rings made from the engineering plastics of selflubricating.
5. a kind of bolt rod driving mechanism for Microscale plunger pump according to claim 1, it is characterized in that, outer sliding sleeve (9) top of described nut driveshaft is provided with top accumulator (15), nut driveshaft outer sliding sleeve (9) bottom and is provided with bottom accumulator (21), is connected with bottom accumulator (21) by through hole (20).
6. a kind of bolt rod driving mechanism for Microscale plunger pump according to claim 1, is characterized in that, but be provided with nut driveshaft left side cavity (4), nut driveshaft the right cavity (19) of oil storage in described bolt rod driving mechanism.
7. a kind of bolt rod driving mechanism for Microscale plunger pump according to claim 5, is characterized in that, described top accumulator (15) is provided with oil hole, and bottom accumulator (21) is provided with oil drainage hole; Described oil hole and oil drainage hole are separately installed with screw and gasket seal (14).
8. a kind of bolt rod driving mechanism for Microscale plunger pump according to claim 5, is characterized in that, is provided with the stock screw (25) of oil-feed deep hole (26) and front end band seal ring in the accumulator of described top.
9. Microscale plunger pump that adopts described claim 1 bolt rod driving mechanism, it is characterized in that, grating (18) and the photoelectric detector (5) of control nut driveshaft (10) and plunger pump piston (3) displacement amount is installed at the right-hand member of stepping motor rotating shaft (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220634291 CN202971784U (en) | 2012-11-27 | 2012-11-27 | Screw rod driving mechanism for microscale plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220634291 CN202971784U (en) | 2012-11-27 | 2012-11-27 | Screw rod driving mechanism for microscale plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202971784U true CN202971784U (en) | 2013-06-05 |
Family
ID=48512861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220634291 Withdrawn - After Issue CN202971784U (en) | 2012-11-27 | 2012-11-27 | Screw rod driving mechanism for microscale plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202971784U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996740A (en) * | 2012-11-27 | 2013-03-27 | 上海惠中医疗科技有限公司 | Screw driving mechanism for micro plunger pump |
| CN115342179A (en) * | 2022-06-28 | 2022-11-15 | 杭州华一强实业有限公司 | Electric telescopic joint rod |
-
2012
- 2012-11-27 CN CN 201220634291 patent/CN202971784U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996740A (en) * | 2012-11-27 | 2013-03-27 | 上海惠中医疗科技有限公司 | Screw driving mechanism for micro plunger pump |
| CN102996740B (en) * | 2012-11-27 | 2015-06-03 | 上海惠中医疗科技有限公司 | Screw driving mechanism for micro plunger pump and the micro plunger pump |
| CN115342179A (en) * | 2022-06-28 | 2022-11-15 | 杭州华一强实业有限公司 | Electric telescopic joint rod |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130605 Effective date of abandoning: 20150603 |
|
| RGAV | Abandon patent right to avoid regrant |