CN111706487A

CN111706487A - Toothed reciprocating pump

Info

Publication number: CN111706487A
Application number: CN202010710325.4A
Authority: CN
Inventors: 王健军; 吴尧尧; 徐明林; 陈志荣
Original assignee: Shandong Tongyuan Pump Co ltd
Current assignee: Shandong Tongyuan Pump Co ltd
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2020-09-25

Abstract

The invention discloses a gear-driven reciprocating pump, which comprises a gear-rack reciprocating mechanism, a pump cylinder, a piston rod, a water inlet one-way valve and a water outlet one-way valve, wherein the water inlet one-way valve and the water outlet one-way valve are arranged at the water inlet end and the water outlet end of a pipeline, the piston is arranged in the pump cylinder, the piston rod is arranged in the piston in a matched manner, the piston rod is of a hollow structure and is communicated with the pipeline and the piston, the pump cylinder is driven by the gear-rack reciprocating mechanism to do uniform reciprocating motion relative to the piston rod, and the gear-rack reciprocating mechanism: the defects caused by the existing crankshaft connecting rod structure are eliminated, the piston moves at a constant speed, the energy consumption is low, the load is stable, high-power driving can be realized, the product is easy to enlarge, the relative stroke of the pump cylinder and the piston can be increased by increasing the diameter of the driving gear, the opening and closing frequency of the medium inlet valve and the medium outlet valve is reduced, and the service life is prolonged.

Description

Toothed reciprocating pump

Technical Field

The invention relates to a reciprocating pump, in particular to a toothed reciprocating pump.

Background

The existing water pump mainly adopts an impeller pump, secondly adopts a reciprocating pump, and additionally comprises a screw pump, a gear pump and the like. Common impeller pumps are centrifugal, axial, and mixed flow pumps. The sales volume of the impeller pump is about more than 70% of the sales volume of the water pump, and particularly, the impeller pump is almost the impeller pump in the current market. The impeller pump rotates at a high speed through the impeller, applies centrifugal force to the medium and throws the medium away; or applying lifting force to the medium to press the medium out along the axial direction,

the impeller pump mainly has the defects of difficult manufacture, low efficiency, high energy consumption, low lift, short service life and the like, is influenced by the factors, is mostly a low-lift pump in the existing impeller pump on the market, and is mostly used for the working conditions with lower corrosivity and abrasiveness. The reciprocating pump utilizes the relative reciprocating motion of piston (plunger) and pump cylinder, changes the volume of pump cylinder die cavity and carries the medium, and reciprocating pump is mostly high-lift, low flow pump.

The existing reciprocating pump mostly adopts a crankshaft connecting rod mechanism to drive a piston, the piston movement is variable speed movement, and the energy consumption is high; the motor load fluctuation is large, and the high-power driving is difficult; the piston stroke is short, and the switching frequency and the service life of related valves are high; limited by the crankshaft connecting rod mechanism, the product is not easy to be enlarged. Therefore, most reciprocating pumps in the current market are high-lift and low-flow pumps.

Disclosure of Invention

The present invention is directed to a gear-driven reciprocating pump to solve the above problems.

In order to achieve the purpose, the invention provides the following technical scheme:

a gear-driven reciprocating pump comprises a gear-rack reciprocating mechanism, a pump cylinder, a piston rod, a water inlet one-way valve and a water outlet one-way valve, wherein the water inlet one-way valve and the water outlet one-way valve are arranged at the water inlet end and the water outlet end of a pipeline, the piston is arranged in the pump cylinder, the piston rod is arranged in the piston in a matched mode, the piston rod is of a hollow structure and is communicated with the pipeline and the piston, and the pump cylinder is driven by the gear-rack reciprocating mechanism to do uniform reciprocating motion relative to the piston rod.

As a further scheme of the invention: the gear-rack reciprocating mechanism comprises a driving gear, a driving rack and a moving frame, wherein the driving gear is an incomplete gear, the driving racks meshed with the driving gear are arranged above and below the driving gear, the driving racks are arranged on the inner side of the moving frame, and a pump cylinder is arranged on the outer side of the moving frame.

As a still further scheme of the invention: the modulus of the first and last pairs of teeth meshed with the driving rack of the driving gear is larger than that of other teeth, so as to meet the load-changing driving requirement.

As a still further scheme of the invention: the bottom of the pump cylinder is also provided with a fixed frame, and the matching surface of the pump cylinder and the fixed frame is also provided with a plurality of guide wheels.

As a still further scheme of the invention: the end part of the piston rod is hermetically connected with the pipeline through a flange.

As a still further scheme of the invention: the axis position of the driving gear is also connected with a motor reducer through a driving shaft.

Compared with the prior art, the invention has the beneficial effects that: the defects caused by the existing crankshaft connecting rod structure are eliminated, the piston moves at a constant speed, the energy consumption is low, the load is stable, high-power driving can be realized, the product is easy to enlarge, the relative stroke of the pump cylinder and the piston can be increased by increasing the diameter of the driving gear, the opening and closing frequency of the medium inlet valve and the medium outlet valve is reduced, and the service life is prolonged.

Drawings

Fig. 1 is a schematic view of a structure of a toothed reciprocating pump.

In the figure: 1-driving shaft, 2-driving gear, 3-driving rack, 4-moving frame, 5-pump cylinder, 6-piston, 7-piston rod, 8-fixed frame, 9-water inlet one-way valve and 10-water outlet one-way valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, in an embodiment of the present invention, a gear-driven reciprocating pump includes a pump cylinder 5, a piston 6, a piston rod 7, and a water inlet check valve 9 and a water outlet check valve 10 installed at a water inlet end and a water outlet end of a pipeline, the piston 6 is installed in the pump cylinder 5, the piston rod 7 is installed in the piston 6 in a matching manner, the piston rod 7 is of a hollow structure and is communicated with the pipeline and the piston 6, specifically, an end of the piston rod 7 is hermetically connected with the pipeline through a flange, and the pump cylinder 5 is driven by a reciprocating mechanism to reciprocate at a constant speed relative to the piston rod 7.

In practical application, in the first half of the embodiment, the reciprocating mechanism drives the pump cylinder 5 to move at a uniform speed, at the moment, the pump cylinder 5 moves leftwards, the space surrounded by the outer walls of the pump cylinder 5, the piston 6 and the piston rod 7 becomes smaller, water in the space flows into the pipeline from the hollow piston rod 7 and is pumped out from the water outlet end of the pipeline, in the second half of the embodiment, the reciprocating mechanism drives the pump cylinder 5 to move rightwards, at the moment, the space surrounded by the outer walls of the pump cylinder 5, the piston 6 and the piston rod 7 becomes larger, and water enters the space from the water inlet end of the pipeline through the hollow piston rod 7 and waits to be pumped out.

Referring to fig. 1, as a preferred embodiment of the present invention, the gear-rack reciprocating mechanism includes a driving gear 2, a driving rack 3 and a moving frame 4, the driving gear 2 is an incomplete gear, the driving rack 3 engaged with the driving gear 2 is installed above and below the driving gear 2, the driving rack 3 is installed inside the moving frame 4, and a pump cylinder 5 is installed outside the moving frame 4. The quantity of pipeline is two, every the one end of pipeline all be equipped with two branch pipes that piston rod 7 is connected, the quantity of drive rack 3 and pump cylinder 5 that correspond also is two, is in two in same pump cylinder 5 the tip fixed connection of piston rod 7 and each other not communicate, two drive rack 3 branch is in the both sides position of drive gear 2.

In this embodiment, because drive gear 2 is incomplete gear, when it rotates to and drives rack 3 engaged state, can drive the removal of pump cylinder 5 this moment, in the time of practical application, drive gear 2 drives a drive rack 3 earlier and moves left, two pistons 6 that are in same pump cylinder 5 this moment present two kinds of motion states, one of them space diminishes, make the outside pump water of pipeline that is connected with corresponding piston rod 7, another space grow, make and correspond piston rod 7 and draw water, during the latter half-stroke, drive gear 2 drives another drive rack 3 and moves right, similar to the aforesaid, two pistons 6 in same pump cylinder 5 present two kinds of motion states, realize continuous pump water operation.

Preferably, the axial position of the driving gear 2 is further connected to a motor reducer through a driving shaft 1. The device eliminates the defects caused by the existing crankshaft connecting rod structure, the piston moves at a constant speed, the energy consumption is low, the load is stable, high-power driving can be realized, the product is easy to enlarge, the relative stroke of the pump cylinder and the piston can be increased by increasing the diameter of the driving gear, the opening and closing frequency of the medium inlet and outlet valve is reduced, and the service life is prolonged. And meanwhile, the modulus of the first teeth and the last teeth of the gear and the rack is increased, the reversing load change influence can be greatly reduced, and the service life is prolonged.

Referring to fig. 1, as another preferred embodiment of the present invention, a fixing frame 8 is further disposed at the bottom of the pump cylinder 5, and a plurality of guide wheels are further disposed on a matching surface between the pump cylinder 5 and the fixing frame 8.

Through the leading wheel that sets up, can make the motion of pump cylinder 5 more smooth and easy, reduce the vibration of whole device etc. help prolonging the life of complete machine.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a tooth dynamic formula reciprocating pump, includes gear-rack reciprocating motion mechanism, pump cylinder (5), piston (6), piston rod (7) and installs in the pipeline intake end and go out water end intake check valve (9) and go out water check valve (10), its characterized in that, install piston (6) in pump cylinder (5), piston rod (7) are installed to piston (6) fit in, piston rod (7) be hollow structure and with pipeline and piston (6) intercommunication, pump cylinder (5) are by gear-rack reciprocating motion mechanism drive for piston rod (7) uniform velocity reciprocating motion.

2. A reciprocating pump of the gear-type according to claim 1, characterized in that the gear-rack reciprocating mechanism comprises a driving gear (2), a driving rack (3) and a moving frame (4), the driving gear (2) is an incomplete gear, the driving rack (3) meshed with the driving gear (2) is installed above and below the driving gear, the driving rack (3) is installed inside the moving frame (4), and the pump cylinder (5) is installed outside the moving frame (4).

3. The gear-rack reciprocating mechanism according to claim 2, characterized in that the first and last pairs of teeth of the driving gear (2) meshed with the driving rack (3) have a larger module than the other teeth so as to meet the variable load driving requirement.

4. A reciprocating pump according to claim 1 or 2, characterized in that the bottom of the pump cylinder (5) is provided with a fixed frame (8), and the matching surface of the pump cylinder (5) and the fixed frame (8) is provided with a plurality of guide wheels.

5. A pump according to claim 3, wherein the end of the piston rod (7) is sealingly connected to the pipe by a flange.

6. A pump according to claim 2, wherein the drive gear (2) is further connected at its axial center position to a motor reducer via the drive shaft (1).