阅读说明：本技术 一种并列双连杆二级高密封高压泵 (Parallel double-connecting-rod two-stage high-sealing high-pressure pump ) 是由 高杨清 高雪峰 苏明明 于 2020-07-08 设计创作，主要内容包括：一种并列双连杆二级高密封高压泵,包括依次连接的一级缸盖,一级缸座、二级缸座和曲轴箱,所述曲轴箱一侧安装有驱动器,驱动器的输出端穿过曲轴箱连接有曲轴；所述曲轴上套设有两根连杆,两根连杆中间设有二级缸,连杆另一端穿设有销轴,销轴上套设有一级活塞座；所述一级缸座内设置有一级缸套；所述一级活塞座在一级缸套内滑动；所述一级活塞座底部高密封连接有高压杆；所述高压杆下方外侧套设有高压缸套；所述高压缸套设于二级缸座内；所述高压杆下端高密封连接有高压活塞；所述高压活塞中外部与高压缸内壁之间依次套设有高压活塞环、高压活塞垫和弹簧。与现有技术相比,本发明通过双连杆推动活塞,使得工作过程中推力均衡稳定。(A parallel double-connecting-rod two-stage high-sealing high-pressure pump comprises a first-stage cylinder cover, a first-stage cylinder seat, a second-stage cylinder seat and a crankcase which are sequentially connected, wherein a driver is installed on one side of the crankcase, and the output end of the driver penetrates through the crankcase and is connected with a crankshaft; the crankshaft is sleeved with two connecting rods, a secondary cylinder is arranged between the two connecting rods, the other end of each connecting rod penetrates through a pin shaft, and a primary piston seat is sleeved on the pin shaft; a primary cylinder sleeve is arranged in the primary cylinder seat; the primary piston seat slides in the primary cylinder sleeve; the bottom of the primary piston seat is connected with a high pressure rod in a high sealing way; a high-pressure cylinder sleeve is sleeved on the outer side below the high-pressure rod; the high-pressure cylinder sleeve is arranged in the secondary cylinder seat; the lower end of the high-pressure rod is connected with a high-pressure piston in a high-sealing manner; and a high-pressure piston ring, a high-pressure piston pad and a spring are sequentially sleeved between the middle outer part of the high-pressure piston and the inner wall of the high-pressure cylinder. Compared with the prior art, the double-connecting-rod type piston pushing device has the advantages that the piston is pushed through the double connecting rods, so that the pushing force is balanced and stable in the working process.)

1. The utility model provides a two high-seal high-pressure pump of double link that parallel which characterized in that: the cylinder body is formed by sequentially connecting a primary cylinder cover, a primary cylinder seat, a secondary cylinder seat and a crankcase, and the piston cylinder comprises a primary cylinder and a secondary cylinder which are arranged up and down; a driver is installed on one side of the crankcase, and the output end of the driver penetrates through the crankcase and is connected with a crankshaft; the crankshaft is sleeved with two connecting rods, and the connecting rods are arranged in parallel; the upper end of the connecting rod is movably connected with a primary cylinder; the second-stage cylinder is arranged in the middle of the connecting rod, and the airflow in the first-stage cylinder can be introduced into the second-stage cylinder.

2. A side-by-side double link high pressure pump for high seal, second stage, according to claim 1, further comprising: the primary cylinder comprises a primary piston seat, the lower end of the primary piston seat is positioned between the connecting rods, a pin shaft is arranged between the upper ends of the connecting rods, and the lower end of the primary piston seat is sleeved on the pin shaft; a steel sleeve is arranged between the pin shaft and the primary piston seat and is sleeved outside the pin shaft; a primary cylinder sleeve is arranged in the primary cylinder seat, and a primary piston seat slides in the primary cylinder sleeve; the upper end of the primary piston seat is provided with a piston ring, and the piston ring is pressed above the primary piston seat through a piston cover; the piston cover is provided with a first through hole, the middle of the primary piston seat is provided with a second through hole, and the first through hole is communicated with the second through hole; the bottom of the primary piston seat is connected with a high pressure rod in a high sealing way; and a third through hole is formed in the middle of the high-pressure rod and is in high-sealing connection with a second through hole in the middle of the primary piston seat.

3. A side-by-side double link high pressure pump for high seal, second stage, according to claim 2, wherein: the secondary cylinder comprises a high-pressure piston, and the high-pressure piston is connected to the bottom of the high-pressure rod; a high-pressure cylinder sleeve is arranged in the secondary cylinder seat, and high-pressure pistons below the high-pressure rod and at the bottom of the high-pressure rod slide in the high-pressure cylinder sleeve; a high-pressure piston ring, a high-pressure piston pad and a spring are sequentially sleeved between the outer side of the high-pressure piston and the inner wall of the high-pressure cylinder sleeve; the high-pressure piston ring and the high-pressure piston pad are in a conical surface fit structure, and are pushed by a spring to keep the conical surfaces fit, so that the high-pressure piston ring and the cylinder wall of the high-pressure cylinder sleeve are always in a high-sealing automatic compensation state.

4. A side-by-side double link high pressure pump for high seal, second stage, according to claim 2, wherein: a first one-way valve is arranged in the first-stage cylinder cover and comprises a first-stage valve plate and a valve plate baffle, and one end of the first-stage valve plate and one end of the valve plate baffle are arranged at the bottom of the first-stage cylinder cover through a first screw; the side surface of the primary cylinder cover is provided with a filter, and an air passage is processed in the primary cylinder cover and is communicated with the inlet side of the filter; one side of the first-stage valve block covers the bottom of an air inlet of the air passage, and one side of the valve block baffle is arranged below the first-stage valve block at an included angle of 6-8 degrees.

5. A side-by-side double link high pressure pump for high seal, second stage, according to claim 2, wherein: and a second one-way valve is arranged below the piston cover and comprises a two-section valve block, one end of the two-section valve block is arranged below the piston cover through a second screw, and the other end of the two-section valve block is arranged below the third through hole at an included angle of 1-3 degrees.

6. A side-by-side double link high pressure pump for high seal, second stage, according to claim 3, wherein: the bottom of the high-pressure piston is provided with a third one-way valve; a fourth one-way valve is arranged at the bottom of the secondary cylinder seat; and one side of the secondary cylinder seat is connected with an output connector, and one side of the output connector is communicated with the fourth one-way valve through an internal pipeline.

7. A side-by-side double link high pressure pump for high seal, second stage, according to claim 1, further comprising: one side of the crankcase is connected with a crankcase cover; a spacer bush is arranged between the lower parts of the connecting rods and sleeved on the crankshaft, and the connecting rods are separated by the spacer bush; the end part of the crankshaft is connected with a connecting rod baffle through a third screw.

8. A side-by-side double link high pressure pump for high seal, second stage, according to claim 2, wherein: and clamping springs and gaskets are arranged at two ends of the pin shaft.

9. A side-by-side double link high pressure pump for high seal, second stage, according to claim 3, wherein: and a high-pressure piston split ring is sleeved on the outer side of the high-pressure piston.

10. A side-by-side double link high pressure pump for high seal, second stage, according to claim 3, wherein: an annular water cooling groove I is processed on the inner wall of the primary cylinder seat at the outer side of the primary cylinder sleeve; one side of the annular water cooling groove is connected with a water inlet joint; an annular water cooling groove II is processed on the inner wall of the secondary cylinder seat at the outer side of the high-pressure cylinder sleeve; one side of the annular water-cooling groove II is connected with a water outlet joint; and the annular water-cooling groove I and the annular water-cooling groove II are communicated through an internal passage.

Technical Field

The invention relates to the technical field of high-pressure pumps, in particular to a parallel double-connecting-rod two-stage high-seal high-pressure pump.

Background

The two-stage high-pressure pump outputs gas or liquid after being pressurized, the two-stage high-pressure pump drives a single connecting rod to lift a piston through a crankshaft at present, and due to the fact that the single connecting rod is poor in stability, the piston is prone to being inclined towards one side in the moving process, the phenomenon of cylinder biting is caused, output pressure is insufficient, and power and energy are wasted.

Disclosure of Invention

The invention aims to solve the technical problem of the prior art and provides a parallel double-connecting-rod two-stage high-seal high-pressure pump.

In order to solve the technical problems, the invention adopts the technical scheme that:

a parallel double-connecting-rod two-stage high-seal high-pressure pump comprises a cylinder body and a piston cylinder arranged in the cylinder body, wherein the cylinder body is formed by sequentially connecting a primary cylinder cover, a primary cylinder base, a secondary cylinder base and a crankcase, and the piston cylinder comprises a primary cylinder and a secondary cylinder which are arranged up and down; the first-stage cylinder cover is arranged above the first-stage cylinder base through a bolt, the bottom of the first-stage cylinder base and the upper end of the second-stage cylinder base are positioned and installed through a positioning pin, a positioning boss is machined at the bottom of the second-stage cylinder base and positioned and installed with the upper end of a crankcase, and a first sealing ring is arranged at the joint of the positioning boss and the crankcase for sealing; a driver is installed on one side of the crankcase, and the output end of the driver penetrates through the crankcase and is connected with a crankshaft; the crankshaft is sleeved with two connecting rods, the connecting rods are arranged in parallel, a pin shaft penetrates through the upper ends of the connecting rods, a primary cylinder is connected to the pin shaft and comprises a primary piston seat, the lower end of the primary piston seat is located between the connecting rods, and the primary piston seat is sleeved on the pin shaft; a primary cylinder sleeve is arranged in the primary cylinder seat, and a primary piston seat slides in the primary cylinder sleeve; the upper end of the primary piston seat is provided with a piston ring, and the piston ring is pressed above the primary piston seat through a piston cover; the piston cover is provided with a first through hole, the middle of the primary piston seat is provided with a second through hole, and the first through hole is communicated with the second through hole; the bottom of the primary piston seat is connected with a high pressure rod in a high sealing way; a third through hole is formed in the middle of the inside of the high-pressure rod and is in high-sealing connection with a second through hole in the middle of the primary piston seat; a secondary cylinder is arranged in the middle of the connecting rod and comprises a high-pressure piston, and the high-pressure piston is connected to the bottom of the high-pressure rod; a high-pressure cylinder sleeve is arranged in the secondary cylinder seat, and high-pressure pistons below the high-pressure rod and at the bottom of the high-pressure rod slide in the high-pressure cylinder sleeve; a high-pressure piston ring, a high-pressure piston pad, a spring and a high-pressure piston split ring are sequentially sleeved between the outer side of the high-pressure piston and the inner wall of the high-pressure cylinder sleeve; the high-pressure piston ring and the high-pressure piston pad are in a conical surface fit structure, and are pushed by a spring to keep the conical surfaces fit, so that the high-pressure piston ring and the cylinder wall of the high-pressure cylinder sleeve are always in a high-sealing automatic compensation state.

Preferably, a first one-way valve is arranged in the first-stage cylinder cover and comprises a first-stage valve plate and a valve plate baffle, and one end of the first-stage valve plate and one end of the valve plate baffle are arranged at the bottom of the first-stage cylinder cover through a first screw; the side surface of the primary cylinder cover is provided with a filter, and an air passage is processed in the primary cylinder cover and is communicated with the inlet side of the filter; one side of the first-stage valve block covers the bottom of an air inlet of the air flue, and one side of the valve block baffle is arranged below the first-stage valve block at an included angle of 6-8 degrees; a second one-way valve is arranged below the piston cover and comprises a second section of valve block, one end of the second section of valve block is arranged below the piston cover through a second screw, and the other end of the second section of valve block is arranged below the third through hole at an included angle of 1-3 degrees; the bottom of the high-pressure piston is provided with a third one-way valve; a fourth one-way valve is arranged at the bottom of the secondary cylinder seat; the third one-way valve and the fourth one-way valve are ball valves; and one side of the secondary cylinder seat is connected with an output connector, and one side of the output connector is communicated with the fourth one-way valve through an internal pipeline.

One side of the crankcase is connected with a crankcase cover; a spacer bush is arranged between the lower parts of the connecting rods and sleeved on the crankshaft, and the connecting rods are separated by the spacer bush; the end part of the crankshaft is connected with a connecting rod baffle through a third screw.

The two ends of the pin shaft are provided with a clamp spring and a gasket, and the pin shaft is positioned above the connecting rod through the clamp spring and the gasket.

The steel sleeve is arranged between the pin shaft and the primary piston seat and is sleeved outside the pin shaft, and because the machining precision of the inner hole of the steel sleeve is high, the pin shaft has smaller resistance when being pushed by the connecting rod, and the service life of the pin shaft is prolonged.

Preferably, an annular water cooling groove I is processed on the inner wall of the primary cylinder seat at the outer side of the primary cylinder sleeve; one side of the annular water cooling groove is connected with a water inlet joint; an annular water cooling groove II is processed on the inner wall of the secondary cylinder seat at the outer side of the high-pressure cylinder sleeve; one side of the annular water-cooling groove II is connected with a water outlet joint; and the annular water-cooling groove I and the annular water-cooling groove II are communicated through an internal passage.

Compared with the prior art, the parallel double-connecting-rod two-stage high-seal high-pressure pump has the following beneficial effects:

1. the piston is pushed through the double connecting rods, so that the pushing force is balanced and stable in the working process;

2. the high-pressure piston ring and the high-pressure piston pad which are matched with each other in the conical surface are arranged on the outer side of the high-pressure piston to improve the sealing performance;

3. the water-cooling heat dissipation is arranged on the cylinder seat, so that the heat dissipation performance of the high-pressure pump is improved;

4. under the condition that the output pressure is not changed, the rotating speed of the driver can be increased, and the air charging time is shortened.

Drawings

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

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is an enlarged view of FIG. 1A;

FIG. 4 is an enlarged view at FIG. 1B;

FIG. 5 is an enlarged view at FIG. 1C;

wherein, 1, a first-stage cylinder cover, 2, a first-stage cylinder seat, 3, a second-stage cylinder seat, 4, a crankcase, 5, a positioning pin, 6, a first sealing ring, 7, a driver, 8, a crankshaft, 9, a connecting rod, 10, a spacer bush, 11, a connecting rod baffle, 12, a crankcase cover, 13, a plug, 14, a pin shaft, 15, a snap spring, 16, a gasket, 17, a first-stage piston seat, 18, a steel sleeve, 19, a first-stage cylinder sleeve, 20, a second sealing ring, 21, a piston ring, 22, a piston cover, 23, a fourth sealing ring, 24, a fifth sealing ring, 25, a first through hole, 26, a second through hole, 27, a high-pressure rod, 28, a third through hole, 29, a high-pressure piston, 30, a high-pressure cylinder sleeve, 31, a high-pressure piston ring, 32, a high-pressure piston pad, 33, a spring, 34, a high-pressure piston split ring, 35, a first check valve, 36, a filter, 37, 40. the water outlet valve comprises an output connector 41, annular water cooling grooves I and 42, a water inlet connector 43, annular water cooling grooves II and 44, a water outlet connector 351, a first-stage valve plate 352, a valve plate baffle 371 and a second-stage valve plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below.

As shown in fig. 1 to 5, the parallel double-connecting-rod two-stage high-seal high-pressure pump comprises a cylinder body and a piston cylinder arranged in the cylinder body, wherein the cylinder body is formed by sequentially connecting a first-stage cylinder cover 1, a first-stage cylinder seat 2, a second-stage cylinder seat 3 and a crankcase 4, and the piston cylinder comprises a first-stage cylinder and a second-stage cylinder which are arranged up and down; the first-stage cylinder cover 1 is arranged above the first-stage cylinder base 2 through bolts, positioning holes are formed in the bottom of the first-stage cylinder base 2 and the upper end face of the second-stage cylinder base 3, positioning pins 5 penetrate through the positioning holes to enable the first-stage cylinder base and the second-stage cylinder base to be positioned and installed, a positioning boss is arranged at the bottom of the second-stage cylinder base 2, the positioning boss is positioned and installed with the upper end of the crankcase 4, and a first sealing ring 6 is arranged at the joint of the positioning boss and the crankcase 4 to; a driver 7 is arranged on one side of the crankcase 4, in the embodiment, the driver preferably uses a motor, and the output end of the driver 7 penetrates through the crankcase 4 to be connected with a crankshaft 8; the crankshaft 8 is sleeved with two connecting rods 9, wherein the connecting plate 9 on the right side is positioned with a boss surface of the crankshaft, a spacer bush 10 is arranged between the lower parts of the connecting rods 9, the spacer bush 10 is sleeved on the crankshaft 8, and the connecting rods 9 are arranged in parallel through the spacer bush 10; the end part of the crankshaft 8 is connected with a connecting rod baffle 11 through a third screw, and the connecting rod baffle 11 positions the connecting rod 9 on the left side; the high-pressure pump is characterized in that a crankcase cover 12 is connected to one side of the crankcase 4, a pressure relief hole is formed in the crankcase cover 12, a plug 13 is connected to the pressure relief hole for a long time, the plug 13 can be opened to relieve pressure after the high-pressure pump works, the plug 13 still needs to be installed after pressure relief is finished, dust is prevented from entering, and the plug 13 is installed with the crankcase cover 12 in a threaded connection mode.

The connecting rod 9 is provided with a positioning hole in the upper end, a pin shaft 14 penetrates through the positioning hole, a clamp spring 15 and a gasket 16 are arranged at two ends of the pin shaft 14, the pin shaft 14 is positioned above the connecting rod 9 through the clamp spring 15 and the gasket 16, wherein the clamp spring 15 and the gasket 16 are adopted only in one positioning mode, nuts can be connected at two ends of the pin shaft 14 in a threaded mode, or a mode that the positioning pin and an opening pin are combined is adopted to fix two ends of the pin shaft 14.

The pin shaft 14 is connected with a primary cylinder, the primary cylinder comprises a primary piston seat 17, the lower end of the primary piston seat 17 is positioned between the connecting rods 9, and the primary piston seat 17 is sleeved on the pin shaft 14; a primary cylinder sleeve 19 is arranged in the primary cylinder base 2, and a second sealing ring 20 is arranged at the joint of the upper end and the lower end of the primary cylinder sleeve 19 and the primary cylinder base 2 for sealing; the primary piston seat 17 slides in the primary cylinder sleeve 19; the upper end of the primary piston seat 17 is provided with a piston ring 21, the piston ring 21 is pressed above the primary piston seat 17 through a piston cover 22, the piston cover 22 is installed with the primary piston seat 17 through a screw and a third sealing ring, and the outer ring at the bottom of the piston cover 22 is sealed with the primary piston seat 17 through a fourth sealing ring 23; a fifth sealing ring 24 is arranged between the outer ring of the primary piston seat 17 and the primary cylinder sleeve 19, and the air tightness of the primary piston seat 17 during working is improved by arranging the piston ring 21 and the fifth sealing ring 24; the piston cover 22 is provided with a first through hole 25, the middle of the first-stage piston seat 17 is provided with a second through hole 26, a mounting gap is reserved between the bottom of the piston cover 22 and the end face of the first-stage piston seat 17, and the first through hole 25 is communicated with the second through hole 26 through the mounting gap; the bottom of the primary piston seat 17 is provided with a high-pressure rod 27, when the primary piston seat 17 is installed, a threaded hole is formed in the bottom of the primary piston seat 17, and the high-pressure rod 27 is in threaded connection with the threaded hole; the middle of the inside of the high-pressure rod 27 is provided with a third through hole 28, the third through hole 28 is in high sealing connection with a second through hole 26 in the middle of the primary piston seat 17, and as the second through hole 26 is provided with an expanded hole penetrating through the steel sleeve 18, the gas in the second through hole 26 is introduced into the third through hole 28.

A secondary cylinder is arranged in the middle of the connecting rod 9 and comprises a high-pressure piston 29, and the upper end of the high-pressure piston 29 is installed at the bottom of the high-pressure rod 27 in a threaded connection mode; a high-pressure cylinder sleeve 30 is arranged in the secondary cylinder base 3, and the upper end and the lower end of the high-pressure cylinder sleeve 30 are hermetically connected with the secondary cylinder base 3; a high-pressure piston 29 below the high-pressure rod 27 and at the bottom of the high-pressure rod 27 slides in a high-pressure cylinder sleeve 30; a high-pressure piston ring 31, a high-pressure piston pad 32, a spring 33 and a high-pressure piston split ring 34 are sequentially sleeved between the outer side of the high-pressure piston 29 and the inner wall of the high-pressure cylinder sleeve 30; in this embodiment, three sets of high-pressure piston snap rings 34 are provided, and a conical surface fit structure is adopted between the high-pressure piston rings 31 and the high-pressure piston pad 32, and is pushed by the spring 33 to keep the conical surface fit, so that the high-pressure piston rings 31 and the cylinder wall of the high-pressure cylinder sleeve 30 are always in a high-sealing automatic compensation state.

A first one-way valve 35 is arranged in the first-stage cylinder cover 1, the first one-way valve 35 comprises a first-stage valve plate 351 and a valve plate baffle 352, and one end of the first-stage valve plate 351 and one end of the valve plate baffle 352 are arranged at the bottom of the first-stage cylinder cover 1 through a first screw; the side surface of the primary cylinder cover 1 is provided with a filter 36, and the filter 36 filters intake air when the secondary piston of the high-pressure pump moves; an air passage is processed in the first-stage cylinder cover 1 and is communicated with the inlet side of the filter 36; one side of the first-stage valve block 351 covers the bottom of an air inlet of the air passage, and one side of the valve block baffle 352 is arranged below the first-stage valve block 351 at an included angle of 6-8 degrees; a second one-way valve 37 is arranged below the piston cover 22, the second one-way valve 37 is positioned in the mounting gap, the second one-way valve 37 comprises a two-section valve plate 371, one end of the two-section valve plate 371 is mounted below the piston cover 22 through a second screw, and the other end of the two-section valve plate 371 is arranged below the third through hole 25 at an included angle of 1-3 degrees; the bottom of the high-pressure piston 29 is provided with a third one-way valve 38; the bottom of the secondary cylinder seat 3 is provided with a fourth one-way valve 39; the third check valve 38 and the fourth check valve 39 are both common ball valves; one side of the secondary cylinder seat 3 is connected with an output joint 40, and one side of the output joint 40 is communicated with the fourth one-way valve 39 through an internal pipeline.

An annular water cooling groove I41 is processed on the inner wall of the primary cylinder base 2 at the outer side of the primary cylinder sleeve 19; one side of the first annular water-cooling groove 41 is connected with a water inlet connector 42, and the water inlet connector 42 is in threaded connection with the first-stage cylinder base 2; an annular water cooling groove II 43 is processed on the inner wall of the secondary cylinder seat 3 at the outer side of the high-pressure cylinder sleeve 30; one side of the second annular water-cooling groove 43 is connected with a water outlet joint 44, and the water outlet joint 44 is in threaded connection with the second-stage cylinder base 3; the first annular water-cooling groove 42 and the second annular water-cooling groove 43 are communicated through the internal channel, heat dissipation performance of the high-pressure pump is improved through water-cooling heat dissipation, the water drainage hole is formed in the internal channel, and circulating water is discharged after the high-pressure pump works.

The working principle is as follows: the driver 7 drives the connecting rod 9 to work through the crankshaft 8, the connecting rod 9 drives the first-level piston seat 17 to work, pressurization is carried out, then the high-pressure rod 27 works, the third check valve 38 and the fourth check valve 39 are opened, air supply is carried out to the outer side through the air output connector 40, in the process, through double-connecting-rod driving, the stability in the piston motion process is improved, in addition, conical surface fit is adopted between the high-pressure piston ring 31 and the high-pressure piston pad 32, and in the pressurization process, the sealing performance is improved.

The present invention is not limited to the embodiments described above, and those skilled in the art may make modifications or changes within the scope of the disclosure without departing from the spirit of the present invention, so that the scope of the present invention is defined by the appended claims.