CN108105059B

CN108105059B - Plunger connecting pump

Info

Publication number: CN108105059B
Application number: CN201810005567.6A
Authority: CN
Inventors: 阮华兵
Original assignee: Taizhou Huali Machinery Co ltd
Current assignee: Taizhou Huali Machinery Co ltd
Priority date: 2018-01-03
Filing date: 2018-01-03
Publication date: 2023-10-24
Anticipated expiration: 2038-01-03
Also published as: CN108105059A

Abstract

The invention discloses a plunger connecting pump which has the advantages of compact structure and gear transmission, and the technical scheme is characterized by comprising a power transmission assembly and a pump head assembly driven by the power transmission assembly; the power transmission assembly comprises a crank case, a plurality of plunger mounting holes are formed in the same direction of the front end of the crank case side by side, a bearing mounting hole is formed in each of two side faces of the crank case, a bearing is arranged in each bearing mounting hole, a crank shaft rod is fixed in a shaft hole of the bearing, a spline is arranged at the first end of the crank shaft rod and extends out of the crank case, a large gear is assembled at the first end of the crank shaft rod through the spline, a gear box is fixedly connected to the position of the large gear, a pinion meshed with the large gear is arranged in the gear box, the pinion is fixedly connected with the pinion and is rotatably mounted on an input shaft in the gear box, a plunger rod is sleeved on the crank shaft rod, the second end of the plunger rod penetrates through the plunger mounting hole, and the plunger rod is used for driving the pump head assembly to enter water and discharge water.

Description

Plunger connecting pump

Technical Field

The invention relates to the technical field of plunger pumps, in particular to a plunger connecting pump.

Background

Plunger pumps are an important device of hydraulic systems. The plunger reciprocates in the cylinder body to change the volume of the sealed working cavity, so as to realize oil absorption and pressure oil. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, convenient flow regulation and the like.

The existing plunger pump is disclosed in publication No. CN105298787A, and the three-cylinder single-acting plunger pump comprises a belt pulley, a power end and a hydraulic end, wherein a belt pulley mounting belt is connected with a motor to provide power; the belt pulley is connected with the crankshaft; the large end of the connecting rod is connected with the crankshaft through a connecting rod tile, and the small end of the connecting rod is connected with the cross head through a cross head pin; the cross head is connected with the plunger through a plunger clip, so that the plunger is driven to do reciprocating linear motion in the packing box; the pump head body is internally provided with a suction valve and a discharge valve, liquid enters the hydraulic cylinder through the suction valve, and the liquid is pressurized through the forward and backward movement of the plunger, and is discharged through the discharge valve.

The structure of the belt pulley has the following defects that the belt pulley is large in size, occupies space and is inconvenient to transport; the belt pulley as a power transmission structure is liable to slip of the belt, thereby causing inefficiency, and there is room for improvement.

Disclosure of Invention

Aiming at the defects existing in the prior art, the invention aims to provide a plunger connecting pump which has the advantages of compact structure and gear transmission.

The technical aim of the invention is realized by the following technical scheme: a plunger connection pump comprises a power transmission assembly and a pump head assembly driven by the power transmission assembly;

the power transmission assembly comprises a crank case, a plurality of plunger mounting holes are formed in the front end of the crank case in the same direction side by side, a bearing mounting hole is formed in each of two side faces of the crank case, the axes of the two bearing mounting holes are located on the same axis, a bearing is arranged in each bearing mounting hole, a crankshaft rod is fixed in a shaft hole of the bearing, a spline is arranged at the first end of the crankshaft rod and extends out of the crank case, a bearing cover is arranged at the second end of the crank case, a large gear is assembled at the first end of the crankshaft rod through the spline, a gear box is fixedly connected with the position of the large gear, a small gear meshed with the large gear is arranged in the gear box, an input shaft fixedly connected with the small gear and rotatably mounted in the gear box, a bearing seat for mounting the first end of the crankshaft rod is further arranged in the gear box, a plunger rod is sleeved on the crankshaft rod in a movable mode, the first end of the plunger rod is sleeved on the neck of the crankshaft rod in a sleeved mode, the second end of the plunger rod penetrates through the plunger mounting hole, and the plunger rod is used for driving the pump head assembly to flow in and flow out of water.

Through above-mentioned setting, bent axle pole both ends are installed on the bearing mounting hole by the bearing to the bearing mounting hole is in same axis, makes bent axle pole rotate on same axis, and bent axle pole work is more stable, more promotes the plunger rod motion, in order to make overall structure compact, the efficient transmission power of being convenient for has adopted big gear and pinion to mesh driven mode and has gone on, and the installation of gear box plays spacing and the protection to big, pinion installation, big gear drive bent axle pole, pinion connection input shaft, the external motor is connected to the input shaft, through gear drive, the phenomenon that the belt pulley skidded has been avoided, overall structure appearance is compact, receive external interference less, motion environment is more reliable and stable. After power is input, the big gear is used for driving the crankshaft rod to rotate, and then the plunger rod reciprocates, so that the pump head assembly can efficiently discharge water.

The specific scheme of the invention can be preferably as follows: the crankcase is further provided with an oil filling hole, the oil filling hole is connected with an oil filling cover in a threaded manner, the rear end of the crankcase is provided with a rear cover in a matched manner through a sealing ring, the rear cover is provided with an oil drain hole, the oil drain hole is connected with an oil plug in a threaded manner, and the rear cover is provided with an oil mark observation window.

Through above-mentioned setting, in order to reduce friction and the temperature rise between bent axle pole and the plunger rod, can add lubricating oil in the inside of crankcase, utilize tank filler hole and oil drain hole can control the lubricating oil level of inside for the inside of crankcase forms sealed space through oil plug, filler cap and hou gai, can reduce the seepage of lubricating oil this moment. The airtight space cannot be observed, so that the oil level observation window is increased, the internal oil level can be observed, and the oil filling amount can be conveniently grasped.

The specific scheme of the invention can be preferably as follows: and hard paper is clamped between the assembling surfaces of the gear box and the crankcase and is fastened through bolts.

Through above-mentioned setting, in order to avoid the seepage problem of lubricating oil, on adopting the cardboard to add the assembly face again, the cardboard has certain flexibility for this kind of hard metal material of gear box and crankcase, can carry out error compensation on both assembly faces, because the error of machining precision, two assembly faces probably have the flat condition, cause the oil leak easily, through the oil absorption effect of cardboard to and the flexible material, can compensate the unevenness of assembly face.

The specific scheme of the invention can be preferably as follows: the pump head assembly comprises a water inlet seat, a cylinder body and a water outlet seat, wherein the cylinder body is fixed between the water inlet seat and the water outlet seat, a plurality of channels are arranged in the cylinder body side by side, one-way valve is respectively arranged at two ends of each channel, and one opening of each channel is opposite to the plunger mounting hole.

Through the arrangement, the channels are mainly used for supplying water, water can be shunted into each channel from the water inlet seat through the cylinder body and then discharged from the water outlet seat, and the water flow is driven by the plunger rod to move in one direction according to the one-way valve, so that the water flow is stopped.

The specific scheme of the invention can be preferably as follows: an air passing space is reserved between the cylinder body and the crankcase, and the plunger rod part is exposed to the air passing space.

Through the arrangement, in the process that the plunger rod is driven by the crank shaft to move back and forth, the plunger rod generates heat due to friction, so that an air passing space is reserved between the cylinder body and the crank case, the plunger rod is exposed to the air passing space, and heat on the plunger rod is taken away through external air flow, so that the temperature of the plunger rod is reduced.

The specific scheme of the invention can be preferably as follows: the water outlet seat is connected with a plurality of water outlet switches, a gas tank, a pressure gauge and a pressure regulating valve.

Through the arrangement, water outlet connection and control are convenient, the gas tank can be used for compensating internal water pressure, the pressure gauge can be used for displaying internal water pressure change, and the pressure regulating valve can be used for regulating internal water pressure.

The specific scheme of the invention can be preferably as follows: an oil seal is arranged between the plunger mounting hole and the plunger rod, and the oil seal is in interference fit with the plunger mounting hole.

Through above-mentioned setting, the oil blanket piece can prevent that lubricating oil in the crankcase from leaking from plunger mounting hole, interference fit on the plunger mounting hole, and the plunger rod can be on the oil blanket piece activity to prevent that lubricating oil from leaking.

The specific scheme of the invention can be preferably as follows: the first end of the plunger rod is provided with a semi-annular first mounting seat and a semi-annular second mounting seat in a split mode, and the combined surface of the first mounting seat and the combined surface of the second mounting seat are fixed through bolts.

Through above-mentioned setting, plunger rod convenient to detach and equipment adopt the mode of suit to fix the plunger rod, through with first mount pad and second mount pad split, then the lock cup joints on the bent axle pole, fasten first mount pad and second mount pad by the bolt, the dynamics of fastening can be adjusted through the bolt from this.

The specific scheme of the invention can be preferably as follows: the three plunger rods are arranged, and when the middle plunger rod retreats, the plunger rods at the two sides synchronously advance.

Through the arrangement, according to the fluid dynamics, the plunger rod is designed to regularly move, water flows enter from the water inlet seat, then pass through the cylinder body and then exit from the water outlet seat, the water flow moves regularly, the impact on the cylinder body is regular, and the impact is one-stage impact, so that the efficiency of water flow conveying is improved, the loss of the convection impact in the fluid on the kinetic energy is reduced, and the water is efficiently conveyed.

The specific scheme of the invention can be preferably as follows: the plunger rods are three, and the front and back expansion is sequentially carried out.

Through the arrangement, the water inlet based on the water inlet seat is arranged in the middle, so that water is pumped regularly and simultaneously water flow guiding is needed to be carried out by matching with the water inlet position, when the middle plunger rod retreats, the plunger rods at the two sides advance, at the moment, water flow power flows from the middle to the two sides, and then the water flows out of the water outlet seat.

In summary, compared with the prior art, the invention has the following beneficial effects: the whole structure is compact, and the running efficiency is improved by adopting a gear transmission mode. Convenient use and simple assembly, implementation and production.

Drawings

Fig. 1 is a schematic structural view of embodiment 1;

FIG. 2 is a schematic diagram of a crankcase in accordance with embodiment 1;

FIG. 3 is a schematic view of the crankcase structure of example 1, mainly showing the bearing cap;

fig. 4 is an exploded view of the power transmission assembly of embodiment 1;

FIG. 5 is a structural view of a gear box of embodiment 1;

fig. 6 is a connecting structure diagram between the crankcase and the cylinder block of embodiment 1;

FIG. 7 is a structural exploded view of the pump head assembly of example 1;

fig. 8 is a schematic diagram of the motion trail of the plunger rod of embodiment 1;

fig. 9 is a schematic diagram of the motion profile of the plunger rod according to embodiment 2.

Reference numerals: 1. a power transmission assembly; 11. a crankcase; 111. a plunger mounting hole; 112. bearing mounting holes; 113. a fuel filler hole; 114. an oil drain hole; 115. a filler cap; 116. an oil plug; 117. oil level observation window; 118. a rear cover; 12. a bearing; 121. a shaft hole; 13. a crankshaft rod; 131. a neck; 14. a bearing cap; 15. a large gear; 16. a gear box; 161. a bearing seat; 17. a pinion gear; 18. an input shaft; 19. a plunger rod; 191. a first mount; 192. a second mounting base; 2. a pump head assembly; 21. a water inlet seat; 22. a cylinder; 221. a channel; 23. a water outlet seat; 231. a water outlet switch; 232. a gas tank; 233. a pressure gauge; 234. a pressure regulating valve; 24. a one-way valve; 3. a gas passing space; 4. hard paper; 5. and an oil seal.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1:

a plunger coupling pump, as shown in fig. 1, includes a power transmission assembly 1 and a pump head assembly 2 driven by the power transmission assembly 1.

As shown in fig. 2 and 4, the power transmission assembly 1 includes a crankcase 11, a plurality of plunger mounting holes 111 are arranged in parallel in the same direction at the front end of the crankcase 11, a bearing mounting hole 112 is respectively arranged at two side surfaces of the crankcase 11, the axes of the two bearing 12 mounting holes 112 are on the same axis, a bearing 12 is respectively arranged in the bearing mounting hole 112, a crankshaft rod 13 is fixed in a shaft hole 121 of the bearing 12, and a first end of the crankshaft rod 13 is provided with a spline and extends out of the crankcase 11.

As shown in fig. 3, a bearing cover 14 is disposed on the crankcase 11 at the second end position of the crankshaft rod 13, where the bearing cover 14 shields the second end position of the crankshaft rod 13, so that oil leakage is not easy. It is also safer for protection.

Returning to fig. 4, the first end of the crankshaft lever 13 is provided with a large gear 15 by means of a spline, and the crankcase 11 is fixedly connected with a gear box 16 at the position of the large gear 15. The gear box 16 is internally provided with a pinion 17 meshed with the large gear 15, an input shaft 18 fixedly connected with the pinion 17 and rotatably installed in the gear box 16, the gear box 16 is internally provided with a bearing seat 161 for installing a first end of the crank shaft 13, the crank shaft 13 is sleeved with a plunger rod 19, the first end of the plunger rod 19 is movably sleeved on a neck 131 of the crank shaft 13, a second end of the plunger rod 19 penetrates through a plunger installation hole 111, and the plunger rod 19 is used for driving the pump head assembly 2 to feed water and discharge water.

As shown in fig. 4 and 5, an oil seal 5 is provided between the plunger mounting hole 111 and the plunger rod 19, and the oil seal 5 is interference-fitted to the plunger mounting hole 111. The oil seal 5 prevents the lubricant in the crankcase 11 from leaking from the plunger mounting hole 111, the plunger rod 19 is interference fitted to the plunger mounting hole 111, and the plunger rod 19 is movable on the oil seal 5 and prevents the lubricant from leaking.

Referring to fig. 5, the first end of the plunger rod 19 is provided with a first mounting seat 191 and a second mounting seat 192 in a semi-ring shape, and the combined surface of the first mounting seat 191 and the second mounting seat 192 is fixed by bolts. Plunger rod 19 convenient to detach and equipment adopts the mode of suit to fix plunger rod 19, through with first mount pad 191 and second mount pad 192 split, then the lock cup joints on bent axle pole 13, fastens first mount pad 191 and second mount pad 192 by the bolt, and the dynamics of fastening can be adjusted through the bolt from this.

The hard paper 4 is sandwiched between the gear case 16 and the fitting surface of the crankcase 11, and is fastened by bolts. The hard paper 4 may be a commercially available oil absorbing paper. In order to avoid the leakage problem of lubricating oil, the hard paper 4 is adopted to be added on the assembly surface, the hard paper 4 has certain flexibility relative to the hard metal materials of the gear box 16 and the crankcase 11, error compensation can be carried out on the assembly surfaces of the hard paper 4 and the crankcase 11, and due to the error of processing precision, the two assembly surfaces can have flat conditions, oil leakage is easy to occur, and the unevenness of the assembly surfaces can be compensated through the oil absorption effect of the hard paper 4 plate and the flexible materials.

As shown in fig. 2, the crankcase 11 is further provided with an oil filling hole 113, the rear end of the crankcase 11 is matched with a rear cover 118 through a sealing ring, the rear cover 118 is provided with an oil drain hole 114, the oil filling hole 113 is connected with an oil filling cover 115 through threads, the oil drain hole 114 is connected with an oil plug 116 through threads, and the rear cover 118 is provided with an oil level observation window 117. In order to reduce friction between the crank shaft 13 and the plunger rod 19 and increase the temperature, lubrication oil may be added to the interior of the crankcase 11, the oil level of the lubrication oil in the interior may be controlled by the oil filler hole 113 and the oil drain hole 114, and a sealed space may be formed in the interior of the crankcase 11 by the oil plug 116, the oil filler cap 115, and the rear cap 118, at which time leakage of the lubrication oil may be reduced. The oil level observation window 117 is added because the airtight space cannot be observed, so that the internal oil level can be observed, and the oil filling amount can be conveniently grasped.

As shown in fig. 6, an air passing space 3 is left between the cylinder 22 and the crankcase 11, and the plunger rod 19 is partially exposed to the air passing space 3. In the process that the plunger rod 19 is driven by the crank shaft 13 to move back and forth, the plunger rod 19 generates heat due to friction, so that the temperature of the plunger rod 19 is reduced by leaving the air passing space 3 between the cylinder 22 and the crank case 11 and exposing part of the plunger rod 19 to the air passing space 3 and taking away heat on the plunger rod 19 through external air flow.

As shown in fig. 7, the pump head assembly 2 comprises a water inlet seat 21, a cylinder 22 and a water outlet seat 23, wherein the cylinder 22 is fixed between the water inlet seat 21 and the water outlet seat 23, a plurality of channels 221 are arranged in the cylinder 22 side by side, two ends of each channel 221 are respectively provided with a one-way valve 24, and one opening of the channels 221 is opposite to the plunger mounting hole 111. The channels 221 are mainly used for supplying water, the water can be split into each channel 221 from the water inlet seat 21 through the cylinder 22 and then is discharged from the water outlet seat 23, and the water is driven by the plunger rod 19 to move in one direction according to the one-way valve 24, so that the water flow is stopped.

As shown in fig. 7, a plurality of water outlet switches 231, one air tank 232, a pressure gauge 233, and a pressure regulating valve 234 are connected to the water outlet seat 23. For ease of water connection and control, the air tank 232 may be used to compensate for internal water pressure, the pressure gauge 233 may be used to indicate internal water pressure changes, and the pressure regulating valve 234 may regulate internal water pressure.

Driving principle: the crankshaft rod 13 both ends are installed on bearing mounting hole 112 by the bearing to bearing mounting hole 112 is in same axis, make crankshaft rod 13 rotate on same axis, crankshaft rod 13 work is more stable, more promote the motion of plunger rod 19, for making overall structure compact, be convenient for high-efficient transmission power, the mode of big gear 15 and pinion 17 meshing transmission has been adopted, and the installation of gear box 16 plays spacing and the protection to big, pinion 17 installation, big gear 15 drive crankshaft rod 13, pinion 17 connects input shaft 18, input shaft 18 connects external motor, through gear drive, the phenomenon that the belt pulley skidded has been avoided, overall structure appearance is compact, receive external interference less, motion environment is more reliable and stable. After power is input, the big gear 15 is used for driving the crank shaft lever 13 to rotate, and the plunger rod 19 reciprocates, so that the pump head assembly 2 can efficiently discharge water.

As shown in fig. 8, three plunger rods 19 are provided, and the forward and backward expansion and contraction are sequentially performed. The water inlet based on the water inlet seat 21 is in the middle, so that water is pumped regularly and simultaneously water flow guiding is needed by matching with the water inlet position, when the middle plunger rod 19 retreats and the plunger rods 19 on two sides advance, at the moment, water flow power flows from the middle to two sides and then flows out of the water outlet seat 23.

Example 2:

the plunger coupling pump is different from the above embodiment in that, as shown in fig. 9, three plunger rods 19 are provided, and when the middle plunger rod 19 is retracted, the plunger rods 19 on both sides are advanced synchronously. According to fluid dynamics, the plunger rod 19 is designed to regularly move, water flows from the water inlet seat 21, then passes through the cylinder 22 and then exits from the water outlet seat 23, and in the process, the water flow moves regularly, the impact on the cylinder 22 is regular, and the impact is carried out stage by stage, so that the efficiency of water flow conveying is improved, the loss of the convection impact in the fluid on the kinetic energy is reduced, and the water is efficiently conveyed.

The foregoing is merely exemplary embodiments of the present invention and is not intended to limit the scope of the invention, which is defined by the appended claims.

Claims

1. A plunger connecting pump is characterized by comprising a power transmission assembly (1) and a pump head assembly (2) driven by the power transmission assembly (1);

the power transmission assembly (1) comprises a crank case (11), a plurality of plunger mounting holes (111) are arranged in parallel in the same direction at the front end of the crank case (11), a bearing mounting hole (112) is arranged on each of two side surfaces of the crank case (11), the axes of the two bearing mounting holes (112) are positioned on the same axis, a bearing (12) is arranged in each bearing mounting hole (112), a crank shaft (13) is fixed in a shaft hole (121) of the bearing (12), a spline is arranged at the first end of the crank shaft (13) and extends out of the crank case (11), a bearing cover (14) is arranged at the second end position of the crank shaft (13) on the crank case (11), a large gear (15) is assembled at the first end of the crank shaft (13) through the spline, the crank case (11) is fixedly connected with a gear box (16) at the position of the large gear (15), a small gear (17) meshed with the large gear (15) is arranged in the gear box (16), an input shaft (18) fixedly connected with the small gear (17) and rotatably arranged in the gear box (16), a bearing seat (16) is arranged in the gear box (16), a crank shaft (19) is sleeved on the first end of the crank shaft (13) and a plunger rod (161) is arranged at the first end of the crank shaft (13), the first end of the plunger rod (19) is movably sleeved on the neck (131) of the crank shaft rod (13), the second end of the plunger rod (19) passes through the plunger mounting hole (111), and the plunger rod (19) is used for driving the pump head assembly (2) to feed water and discharge water; a hard paper (4) is clamped between the assembling surfaces of the gear box (16) and the crankcase (11), and is fastened through bolts.

2. The plunger coupling pump of claim 1, wherein: the novel oil tank is characterized in that an oil filling hole (113) is further formed in the crankcase (11), an oil filling cover (115) is connected to the oil filling hole (113) in a threaded mode, a rear cover (118) is matched with the rear end of the crankcase (11) through a sealing ring, an oil drain hole (114) is formed in the rear cover (118), an oil plug (116) is connected to the oil drain hole (114) in a threaded mode, and an oil level observation window (117) is formed in the rear cover (118).

3. The plunger coupling pump of claim 1, wherein: the pump head assembly (2) comprises a water inlet seat (21), a cylinder body (22) and a water outlet seat (23), wherein the cylinder body (22) is fixed between the water inlet seat (21) and the water outlet seat (23), a plurality of channels (221) are arranged in the cylinder body (22) side by side, one-way valve (24) is respectively arranged at two ends of each channel (221), and one opening of each channel (221) is opposite to a plunger mounting hole (111).

4. A plunger coupling pump as set forth in claim 3, wherein: an air passing space (3) is reserved between the cylinder body (22) and the crankcase (11), and the plunger rod (19) is partially exposed at the position of the air passing space (3).

5. A plunger coupling pump as set forth in claim 3, wherein: the water outlet seat (23) is connected with a plurality of water outlet switches (231), a gas tank (232), a pressure gauge (233) and a pressure regulating valve (234).

6. The plunger coupling pump of claim 1, wherein: an oil seal (5) is arranged between the plunger mounting hole (111) and the plunger rod (19), and the oil seal (5) is in interference fit with the plunger mounting hole (111).

7. The plunger coupling pump of claim 1, wherein: the first end of the plunger rod (19) is provided with a semi-annular first mounting seat (191) and a semi-annular second mounting seat (192) in a split mode, and the combined surface of the first mounting seat (191) and the second mounting seat (192) is fixed through bolts.

8. The plunger coupling pump of claim 1, wherein: the three plunger rods (19) are arranged, and when the middle plunger rod (19) retreats, the plunger rods (19) at the two sides synchronously advance.

9. The plunger coupling pump of claim 1, wherein: the number of the plunger rods (19) is three, and the front and back expansion is sequentially carried out.