CN213298196U

CN213298196U - Driving structure of reciprocating pump

Info

Publication number: CN213298196U
Application number: CN202022081623.XU
Authority: CN
Inventors: 冯萍
Original assignee: Zibo Shuanghuan Vacuum Pump Factory
Current assignee: Zibo Shuanghuan Vacuum Pump Factory
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2021-05-28
Anticipated expiration: 2030-09-21

Abstract

The utility model relates to a drive structure of reciprocating pump, the field of vacuum pump is related to, it includes the base, the piston cylinder, a piston, driving motor and drive mechanism, driving motor fixed connection is on the base, the piston cylinder is also fixed connection on the base, the piston is coaxial to be worn to establish in the piston cylinder, and the piston slides along the axle center of self and is connected with the piston cylinder, drive mechanism includes reciprocal lead screw and slider, reciprocal lead screw is connected with the driving motor transmission, the thread groove has been seted up on the reciprocal lead screw, the slider joint is in the thread groove of reciprocal lead screw, the piston is connected with the slider. This application is through reciprocating screw's setting, can improve reciprocating pump delivery pressure's stability, moreover because the slider joint all the time in reciprocating screw's thread groove, there is not transmission blank point between slider and the reciprocating screw for transmission between driving motor and the piston is more stable, and the difficult phenomenon of colliding with that produces between slider and the reciprocating screw has reduced reciprocating pump's the damaged probability of drive structure simultaneously.

Description

Driving structure of reciprocating pump

Technical Field

The present application relates to the field of vacuum pumps, and more particularly, to a drive structure for a reciprocating pump.

Background

Reciprocating pumps include piston pumps, metering pumps and diaphragm pumps, commonly known as reciprocating pumps. It is one of positive displacement pumps and has wide application. Reciprocating pumps are delivery machines that provide energy directly to a liquid in the form of pressure energy through the reciprocating motion of a piston. Reciprocating pumps are classified into two broad categories, driven by motor (motor driven) and direct acting (steam, gas or liquid driven), depending on the mode of drive.

At present, Chinese patent invention with publication date of 2019, 05 and 03, and publication number of CN106762500B proposes a horizontal three-cylinder plunger reciprocating pump with gear and rack transmission, which comprises a transmission end and a hydraulic end; the transmission end mainly comprises three pairs of non-full gears with phase difference, racks and plungers, wherein the non-full gears are meshed with the racks, and the racks are fixedly connected with the plungers; the hydraulic end comprises a plunger cylinder, the plunger penetrates through the plunger cylinder, the non-full gear drives the rack to move, and the rack drives the plunger to reciprocate in the plunger cylinder. The non-full gear is disengaged from the upper part of the rack and is engaged with the lower part at the same moment, and the work is smoothly and stably reversed.

In view of the above-mentioned related technologies, the inventor believes that in an actual situation, due to machining errors, installation errors and the like, it is impossible to achieve that the non-full gear is disengaged from the upper part of the rack and engaged with the lower part of the rack at the same instant, and when the non-full gear and the rack are in a state to be engaged, due to the problem of pressure in a plunger cylinder, the non-full gear and the rack are easy to collide with each other, so that gear teeth are damaged and even broken, and thus a transmission end of the reciprocating pump is damaged.

SUMMERY OF THE UTILITY MODEL

In order to reduce the probability of damage to the drive structure of the reciprocating pump, the present application provides a drive structure of a reciprocating pump.

The application provides a reciprocating pump's drive structure adopts following technical scheme:

the utility model provides a drive structure of reciprocating pump, includes base, piston cylinder, piston, driving motor and drive mechanism, driving motor fixed connection be in on the base, the piston cylinder also fixed connection be in on the base, the piston is coaxial to be worn to establish in the piston cylinder, just the piston along self axle center with the piston cylinder slides and is connected, drive mechanism includes reciprocal lead screw and slider, reciprocal lead screw with driving motor transmission is connected, the thread groove has been seted up on the reciprocal lead screw, the slider joint is in the thread groove of reciprocal lead screw, the piston with the slider is connected.

Through adopting above-mentioned technical scheme, because reciprocating screw's setting, driving motor is when the reciprocating screw of drive rotates, the slider can take place relative slip with reciprocating screw along reciprocating screw's length direction with invariable speed, so improved reciprocating pump output pressure's stability, and because the slider joint all the time in reciprocating screw's thread groove, there is not transmission blank point between slider and the reciprocating screw, make the transmission between driving motor and the piston more stable, the difficult phenomenon of colliding with that produces between slider and the reciprocating screw simultaneously, the damaged probability of reciprocating pump's drive structure has been reduced.

Optionally, the transmission mechanism further comprises a sleeve, the sleeve is coaxially sleeved outside the reciprocating screw rod, the sleeve is connected with the piston cylinder in a sliding manner along the axial direction of the piston, the piston is connected to one end of the sleeve, and the sliding block is rotatably connected to the other end of the sleeve.

Through adopting above-mentioned technical scheme, reciprocal lead screw wears to establish in the sleeve, and when reciprocal lead screw rotated, the sleeve slided with the piston cylinder along the axial of reciprocal lead screw relatively for reciprocal lead screw also slides with the sleeve relatively along the axial of self, and reciprocal lead screw is difficult crooked under telescopic support, stability when having improved reciprocal lead screw transmission.

Optionally, the piston is connected to the sleeve in a universal joint.

Through adopting above-mentioned technical scheme, when the sleeve slided along the axial of self and piston cylinder, the piston can take place universal rotation with the sleeve, makes piston and piston cylinder keep higher axiality, and then has alleviateed the degree of wear of piston for be difficult for taking place the weeping phenomenon between piston and the piston cylinder.

Optionally, the number of the sliding blocks is two, the two sliding blocks are arranged in a central symmetry mode along the axis of the reciprocating screw rod, the number of the thread grooves is two, the number of the thread grooves is also arranged in a central symmetry mode along the axis of the reciprocating screw rod, and one sliding block is correspondingly clamped in one thread groove.

By adopting the technical scheme, when the reciprocating screw rod rotates, the two sliding blocks drive the piston at the same time, the stress of a single sliding block is dispersed, and the service life of the sliding block is prolonged; meanwhile, the radial forces applied to the reciprocating lead screw by the two sliding blocks are opposite, so that the radial forces applied to the reciprocating lead screw are mutually offset, the probability of disengagement of the sliding blocks and the reciprocating lead screw is reduced, and the stability of the transmission mechanism during rotation is improved.

Optionally, a spline is fixedly connected to the outer peripheral surface of the sleeve, a spline groove is formed in the inner peripheral surface of the piston cylinder, and the sleeve is clamped with the piston cylinder through the spline and the spline groove.

By adopting the technical scheme, when the reciprocating lead screw rotates, the sleeve and the reciprocating lead screw are not easy to synchronously rotate, so that the transmission efficiency is improved; and when reciprocating screw drive sleeve removed, the difficult card of sleeve was died in the piston cylinder, has improved driven stability.

Optionally, the transmission mechanism further comprises a fastening bolt, the fastening bolt is in threaded connection with the sliding block, the fastening bolt penetrates through the sleeve and is rotatably connected with the sleeve, and the axis of the fastening bolt is perpendicular to the axis of the reciprocating screw rod.

Through adopting above-mentioned technical scheme, when installation reciprocal lead screw and slider, earlier insert reciprocal lead screw in the sleeve, later with the slider joint in the thread groove of reciprocal lead screw, later slide the slider in the thread groove with the position of adjustment slider, later pass the sleeve with fastening bolt to screw up fastening bolt on the slider, so the dismantlement of the slider of being convenient for, the dismouting of the drive mechanism of being convenient for when drive mechanism is impaired.

Optionally, a bearing groove is formed in the sleeve, a rolling bearing is clamped in the bearing groove, and an inner ring of the rolling bearing is coaxially sleeved on the outer peripheral surface of the fastening bolt.

By adopting the technical scheme, when the direction of relative sliding of the reciprocating screw rod and the sleeve is changed, the sliding block can rotate relative to the sleeve along the axis of the fastening bolt, and the fastening bolt is rotationally connected with the sleeve through the rolling bearing, so that the friction force between the fastening bolt and the sleeve is reduced, the probability of disengagement of the fastening bolt and the sliding block is reduced, and the stability of the transmission mechanism during transmission is further improved.

Optionally, drive mechanism still includes the protective cover, protective cover fixed connection be in on the telescopic outer peripheral face, the protective cover lid is established outside the fastening bolt.

By adopting the technical scheme, the protective cover can reduce the probability of impurities entering the rolling bearing and plays a role in protecting the rolling bearing; meanwhile, the protective cover can prevent the fastening bolt from being completely separated from the sliding block, and further the transmission mechanism has a more stable transmission effect.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the reciprocating screw and the sliding block are arranged, so that the stability of the output pressure of the reciprocating pump can be improved, the sliding block is always clamped in a thread groove of the reciprocating screw, and no transmission blank point exists between the sliding block and the reciprocating screw, so that the transmission between a driving motor and a piston is more stable, meanwhile, the sliding block and the reciprocating screw are not easy to collide, and the probability of damage to a driving structure of the reciprocating pump is reduced;

2. through the arrangement of the sleeve, the reciprocating lead screw penetrates through the sleeve, when the reciprocating lead screw rotates, the sleeve slides relative to the piston cylinder along the axial direction of the reciprocating lead screw, so that the reciprocating lead screw also slides relative to the sleeve along the axial direction of the sleeve, the reciprocating lead screw is not easy to bend under the support of the sleeve, and the stability of the reciprocating lead screw during transmission is improved;

3. through the arrangement of the fastening bolt, when the reciprocating lead screw and the sliding block are installed, the reciprocating lead screw is inserted into the sleeve, then the sliding block is clamped in a thread groove of the reciprocating lead screw, then the sliding block slides in the thread groove to adjust the position of the sliding block, then the fastening bolt penetrates through the sleeve and is screwed on the sliding block, so that the sliding block is convenient to disassemble, and the transmission mechanism is convenient to disassemble and assemble when the transmission mechanism is damaged;

4. through the arrangement of the rolling bearing, when the direction of relative sliding of the reciprocating screw rod and the sleeve changes, the sliding block can rotate relative to the sleeve along the axis of the fastening bolt, and the fastening bolt is rotationally connected with the sleeve through the rolling bearing, so that the friction force between the fastening bolt and the sleeve is reduced, the probability of disengagement of the fastening bolt and the sliding block is reduced, and the stability of the transmission mechanism during transmission is further improved.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a schematic cross-sectional view of a sleeve and a piston cylinder according to an embodiment of the present application.

Fig. 3 is an enlarged schematic view of a portion a in fig. 1.

Fig. 4 is an enlarged schematic view of a portion B in fig. 2.

Description of reference numerals: 100. a base; 110. a piston cylinder; 111. a spline groove; 112. a piston cavity; 113. a sleeve cavity; 120. a piston; 121. a universal ball; 130. a drive motor; 200. a transmission mechanism; 210. a reciprocating screw; 211. a thread groove; 220. a slider; 230. a sleeve; 231. connecting lugs; 232. a spline; 233. a bearing groove; 134. a card slot; 240. fastening a bolt; 250. a rolling bearing; 260. a protective cover; 261. and (7) clamping blocks.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a driving structure of a reciprocating pump. Referring to fig. 1 and 2, the driving structure of the reciprocating pump includes a base 100, a piston cylinder 110 is fixedly connected to the base 100 by bolts or integrally cast, a piston cavity 112 is formed at one end of the piston cylinder 110, and a piston 120 coaxially penetrates through the piston cavity 112. The base 100 is further fixedly connected with a driving motor 130 for driving the piston 120 to move through a bolt, and an output shaft of the driving motor 130 is transmitted with the piston 120 through a transmission mechanism 200.

The transmission mechanism 200 comprises a reciprocating screw 210 and a sleeve 230, a sleeve cavity 113 is formed in one end, far away from the piston cavity 112, of the piston cylinder 110, the sleeve cavity 113 and the piston cavity 112 are coaxially arranged, the sleeve 230 coaxially penetrates through the sleeve cavity 113, and the sleeve 230 can slide relative to the piston cylinder 110 along the axial direction of the sleeve 230. One end of the piston 120 close to the sleeve 230 is integrally formed with a universal ball 121, the universal ball 121 is embedded in one end of the sleeve 230, and the universal ball 121 is connected with the sleeve 230 in a universal rotation manner.

The outer peripheral surface of the sleeve 230 is integrally formed with a spline 232, the inner peripheral surface of the sleeve cavity 113 is provided with a spline groove 111, and the sleeve 230 is clamped in the sleeve cavity 113 through the spline 232 and the spline groove 111, so that the sleeve 230 can only slide in the sleeve cavity 113 and cannot rotate in the sleeve cavity 113. Accordingly, the inner diameter of the piston chamber 112 is greater than the maximum outer diameter of the sleeve 230 after it is provided with the splines 232.

Referring to fig. 1 and 3, one end of the reciprocating screw 210 is coaxially connected to the driving motor 130, the other end of the reciprocating screw 210 is inserted into the sleeve 230, the inner diameter of the sleeve 230 is the same as the outer diameter of the reciprocating screw 210, the outer circumferential surface of the reciprocating screw 210 is brought into contact with the inner circumferential surface of the sleeve 230, and the reciprocating screw 210 is slidably connected to the sleeve 230 along the axis thereof.

The transmission mechanism 200 further comprises two sliding blocks 220, and the number of the sliding blocks 220 is two; one end of the sleeve 230 far away from the piston cylinder 110 is integrally formed with two engaging lugs 231, the two engaging lugs 231 are arranged along the axis of the sleeve 230 in a central symmetry manner, and the two sliding blocks 220 are respectively connected to the two engaging lugs 231 in a corresponding rotation manner. The outer peripheral surface of the reciprocating screw 210 is provided with two thread grooves 211, the two thread grooves 211 are arranged in a centrosymmetric manner along the axis of the reciprocating screw 210, one sliding block 220 is correspondingly clamped in one thread groove 211, so that the driving motor 130 drives the reciprocating screw 210 to rotate, the reciprocating screw 210 can drive the sleeve 230 to move along the axis of the reciprocating screw 210 through the sliding block 220, and the sleeve 230 drives the piston 120 to reciprocate.

Referring to fig. 3 and 4, the transmission mechanism 200 further includes a fastening bolt 240 and a rolling bearing 250, wherein the fastening bolt 240 is inserted into the engaging lug 231, the fastening bolt 240 is in threaded connection with the slider 220, the fastening bolt 240 is rotatably connected with the engaging lug 231 along its own axis, and the axis of the fastening bolt 240 is perpendicular to the axis of the reciprocating screw 210. When the reciprocating lead screw 210 and the slider 220 are installed, the reciprocating lead screw 210 is inserted into the sleeve 230, then the slider 220 is clamped in the thread groove 211 of the reciprocating lead screw 210, then the slider 220 is slid in the thread groove 211 to adjust the position of the slider 220, then the fastening bolt 240 passes through the sleeve 230 and is screwed on the slider 220, so that the slider 220 is convenient to disassemble, and the transmission mechanism 200 is convenient to disassemble and assemble when the transmission mechanism 200 is damaged.

Meanwhile, the connecting lug 231 is also provided with a bearing groove 233, the bearing groove 233 faces away from the bidirectional screw rod, the axis of the bearing groove 233 is perpendicular to the bidirectional screw rod, the outer ring of the rolling bearing 250 is coaxially clamped in the bearing groove 233, and the inner ring of the rolling bearing 250 is coaxially sleeved on the outer peripheral surface of the fastening bolt 240, so that the friction force between the fastening bolt 240 and the connecting lug 231 is reduced, the sliding block 220 is convenient to rotate relative to the connecting lug 231 along the axis of the fastening bolt 240, and further the sliding direction of the sleeve 230 is convenient to change.

The rolling bearing 250 is preferably an angular ball bearing, the fastening bolt 240 is preferably a hexagon socket head cap screw, and when the slider 220 is mounted, the bolt head of the fastening bolt 240 abuts against the inner ring of the angular ball bearing, so that the angular ball bearing can bear the radial force for driving the sleeve 230 to move and can bear the axial force from the reciprocating screw 210.

The transmission system further comprises a protective cover 260, a plurality of clamping blocks 261 are integrally formed on the circumferential surface of the protective cover 260, clamping grooves 134 matched with the clamping blocks 261 in position are formed in the circumferential surface of the bearing groove 233, the protective cover 260 is embedded in the connecting lugs 231, the clamping blocks 261 are clamped in the clamping grooves 134, and the protective cover 260 covers the bearing groove 233. And the protective cover 260 is fixedly connected to the connecting lug 231 through the bolt, and one end face of the protective cover 260 close to the fastening bolt 240 is abutted against the bolt head of the fastening bolt 240, so that the fastening bolt 240 is not easy to loosen from the fixture block 261, and the protective cover 260 is not easy to be influenced by the rotation of the fastening bolt 240 due to the arrangement of the fixture block 261.

The implementation principle of the driving structure of the reciprocating pump in the embodiment of the application is as follows:

the driving motor 130 drives the reciprocating screw 210 to rotate, the sliding block 220 slides in a reciprocating manner along the axial direction of the reciprocating screw 210 under the guidance of the thread groove 211, and the piston 120 slides in a reciprocating manner in the piston cavity 112 along the self axial direction at a constant speed under the driving of the sliding block 220 and the sleeve 230, so that the stability of the output pressure of the reciprocating pump is improved; moreover, as the sliding block 220 is always clamped in the thread groove 211 of the reciprocating lead screw 210, no transmission blank point exists between the sliding block 220 and the reciprocating lead screw 210, the transmission between the driving motor 130 and the piston 120 is more stable, meanwhile, the sliding block 220 and the reciprocating lead screw 210 are not easy to collide, and the probability that the driving structure of the reciprocating pump is damaged is reduced; because the two sliding blocks 220 are arranged, and the reciprocating screw 210 is arranged in the sleeve 230 in a penetrating manner, the reciprocating screw 210 is not easy to jump when rotating, the two sliding blocks 220 simultaneously drive the piston 120, the stress of the single sliding block 220 is dispersed, and the service lives of the sliding blocks 220 and the reciprocating screw 210 are prolonged; the sleeve 230 and the piston 120 are in universal connection, when the sleeve 230 slides along the axial direction of the sleeve 230 and the piston cylinder 110, the piston 120 and the sleeve 230 can rotate in a universal mode, so that the piston 120 and the piston cylinder 110 keep high coaxiality, the abrasion degree of the piston 120 is further reduced, and the liquid leakage phenomenon between the piston 120 and the piston cylinder 110 is not prone to occurring.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A drive structure of a reciprocating pump, characterized in that: the reciprocating screw rod mechanism comprises a base (100), a piston cylinder (110), a piston (120), a driving motor (130) and a transmission mechanism (200), wherein the driving motor (130) is fixedly connected to the base (100), the piston cylinder (110) is also fixedly connected to the base (100), the piston (120) is coaxially arranged in the piston cylinder (110) in a penetrating mode, the piston (120) is connected with the piston cylinder (110) in a sliding mode along the axis of the piston (120), the transmission mechanism (200) comprises a reciprocating screw rod (210) and a sliding block (220), the reciprocating screw rod (210) is connected with the driving motor (130) in a transmission mode, a threaded groove (211) is formed in the reciprocating screw rod (210), the sliding block (220) is clamped in the threaded groove (211) of the reciprocating screw rod (210), and the piston (120) is connected with the sliding block (220).

2. A driving structure of a reciprocating pump according to claim 1, wherein: the transmission mechanism (200) further comprises a sleeve (230), the sleeve (230) is coaxially sleeved outside the reciprocating screw rod (210), the sleeve (230) is connected with the piston cylinder (110) in a sliding mode along the axial direction of the piston (120), the piston (120) is connected to one end of the sleeve (230), and the sliding block (220) is rotatably connected to the other end of the sleeve (230).

3. A driving structure of a reciprocating pump according to claim 2, wherein: the piston (120) is connected to the sleeve (230) in a universal manner.

4. A driving structure of a reciprocating pump according to claim 2, wherein: slider (220) are provided with two, and two sliders (220) are central symmetry along the axle center of reciprocal lead screw (210) and set up, two have been seted up in thread groove (211), two thread groove (211) also are central symmetry along the axle center of reciprocal lead screw (210) and set up, one slider (220) correspond the joint in one in thread groove (211).

5. A driving structure of a reciprocating pump according to any one of claims 2 to 4, wherein: the outer circumferential surface of the sleeve (230) is fixedly connected with a spline (232), the inner circumferential surface of the piston cylinder (110) is provided with a spline groove (111), and the sleeve (230) is clamped with the piston cylinder (110) through the spline (232) and the spline groove (111).

6. A driving structure of a reciprocating pump according to claim 2, wherein: the transmission mechanism (200) further comprises a fastening bolt (240), the fastening bolt (240) is in threaded connection with the sliding block (220), the fastening bolt (240) penetrates through the sleeve (230), the fastening bolt (240) is further in rotational connection with the sleeve (230), and the axis of the fastening bolt (240) is perpendicular to the axis of the reciprocating screw rod (210).

7. A driving structure of a reciprocating pump according to claim 6, wherein: the sleeve (230) is provided with a bearing groove (233), the bearing groove (233) is connected with a rolling bearing (250) in a clamping mode, and an inner ring of the rolling bearing (250) is coaxially sleeved on the outer peripheral surface of the fastening bolt (240).

8. A driving structure of a reciprocating pump according to claim 7, wherein: drive mechanism (200) still include protective cover (260), protective cover (260) fixed connection be in on the outer peripheral face of sleeve (230), protective cover (260) cover is established outside fastening bolt (240).