CN101900096B

CN101900096B - Mechanical diaphragm metering pump with adjustable stroke

Info

Publication number: CN101900096B
Application number: CN2010102509944A
Authority: CN
Inventors: 陈岳兴; 胡涛; 刘大庸; 杨孝培
Original assignee: SHANGHAI YUELAN PUMP MANUFACTURING Co Ltd
Current assignee: SHANGHAI YUELAN PUMP MANUFACTURING Co Ltd
Priority date: 2010-08-11
Filing date: 2010-08-11
Publication date: 2012-06-27
Anticipated expiration: 2030-08-11
Also published as: CN101900096A

Abstract

The invention relates to a mechanical diaphragm metering pump with adjustable stroke, comprising a driving part, a pump head part, an enclosure, couplers, a worm shaft and an electric motor; wherein connecting rods of the driving part are sheathed on rotary sleeves by rolling bearings, a worm gear is fixed on a worm gear support by a rolling bearing and a slant lump and a push rod shaft are connected to form a whole. In operation, output flow of the pump is adjusted by changing the stroke length of a diaphragm assembly while the stroke length of the diaphragm assembly is changed by adjusting the working radius of a crank pin. Volume between the diaphragm assembly and the pump head changes along with the change of the stroke length, thus finally changing the output flow of the pump. Due to large diameter and small thread pitch of the screw thread of a hollow shaft sleeve and small slant plane lead angle of the slant lump, precise stepless fine adjustment of the working radius of the crank pin and the stroke length of the diaphragm assembly is realized, thus increasing the pump flow and improving the precision and stability of pressure adjustment and reducing the pulsation degree of flow and pressure.

Description

A kind of mechanical diaphragm metering pump with adjustable stroke

Technical field

The present invention relates to a kind of mechanically actuated diaphragm metering pump, particularly a kind of mechanically actuated diaphragm metering pump of regulating the length of stroke of septum assembly with connecting rod.

Background technique

Mechanically actuated diaphragm metering pump is a kind of reciprocating volumetric pump, is characterized in the Mechanical Driven barrier film, realizes the adjusting of pump duty through the length of stroke of regulating septum assembly.Along with metering pump application area field constantly enlarges; The existing machinery diaphragm metering pump is regulated the mechanical structure of length of stroke; Like regulative modes such as traditional effective stroke regulative mode, variable eccentric stiffeners, for some require degree of regulation high, regulate good stability, field that degree of pulsatility is low, like industries such as medicine, petrochemical industries; Be difficult to realize delicate metering to conveying material; Satisfied not the performance requirement of use aspect, shown overload capacity with operation stability is poor, assembling and dismantle problems such as difficulty is big from structure.

Summary of the invention

The invention discloses a kind of mechanical diaphragm metering pump with adjustable stroke, its objective is the degree of regulation, overload capacity and the operation stability that improve mechanically actuated diaphragm metering pump.

For achieving the above object; A kind of mechanical diaphragm metering pump with adjustable stroke of the present invention comprises drive part, pump head part, casing, coupling, worm shaft, motor; Worm shaft connects with coupling with motor shaft, and wherein said drive part mainly is made up of the axis of guide, axis of guide support, connecting rod, revolving sleeve, slide block, crank pin, worm gear, skewback, push rod shaft, worm-wheel bracket, feather key, hollow swivel nut, swivel nut support, handle; Axis of guide support, worm-wheel bracket, swivel nut support are fixed on the casing, and connecting rod is sleeved on the revolving sleeve through rolling bearing, and worm gear is fixed on the worm-wheel bracket through rolling bearing; Skewback and push rod shaft link as a whole, and the center line of the axis of guide, worm gear, push rod shaft, hollow swivel nut is on same straight line; Push rod shaft is fixed on the hollow swivel nut with rolling bearing; And between push rod shaft and the worm gear feather key is arranged; Push rod shaft and skewback are moved axially with hollow swivel nut, turn round with worm gear, axially movable skewback pulling slide block produces in the guiding groove of worm gear and moves radially.

Further, said pump head part mainly is made up of oil sealing, pump head support, barrier film support ring, septum assembly, extension bar, spring, pump head, diaphragm; The pump head support is fixed on the casing, and the periphery ring of oil sealing is pressed on the casing by the pump head support; Extension bar connects with connecting rod through double-screw bolt, and the interior enclosure of oil sealing is pressed on the connecting rod; Septum assembly connects with double-screw bolt with extension bar, puts spring between septum assembly and the pump head support; Pump head is fixed on the pump head support, and the diaphragm with barrier film support ring and septum assembly compresses simultaneously; There is pump intake the lower end of pump head, and there is the exhaust port of pump the upper end.

The main feature of structure of the present invention is following:

A) connecting rod is sleeved on the revolving sleeve through rolling bearing.Worm gear is fixed on the worm-wheel bracket through rolling bearing, and skewback and push rod shaft are combined into a part;

B) axis of guide, worm gear, push rod shaft, hollow swivel nut are all a center line, i.e. gyration center line;

C) push rod shaft is fixed on the hollow swivel nut with rolling bearing, and between push rod shaft and the worm gear feather key is arranged, and push rod shaft and skewback are moved axially with hollow swivel nut, turns round with worm gear, and hollow swivel nut does not turn round;

D) axially movable skewback pulling slide block produces in the guiding groove of worm gear and moves radially, and changes the radius of clean-up of crank pin;

E) crank pin is linking slide block and two parts of revolving sleeve; Skewback pulling slide block produces when moving radially; The guiding groove of crank pin pulling revolving sleeve moves radially on the guide pad of the axis of guide synchronously; Producing the revolving sleeve geometric center lines is the variation of connecting rod geometric center lines to the connecting rod eccentric distance e of gyration center line, and the connecting rod eccentric distance e and the crank pin radius of clean-up change synchronously.

Because the present invention has adopted above-mentioned technological means; The length of stroke that special connecting rod of the present invention drives barrier film, regulates septum assembly; Pitch is little, the inclined-plane lift angle of skewback is little because the diameter of thread of the hollow swivel nut that the direct relation stroke is regulated is big, makes length of stroke realize accurate stepless fine setting, with the existing mechanical diaphragm metering pump relatively; Realized the delicate metering of conveying material and very low degree of pulsatility; Improved the overload capacity and the operation stability of pump, assembling and dismounting, easy to maintenance, this for industry-by-industry to the ever-increasing demand of metering pump with for the increasingly high requirement of metering pump; And the application area field that constantly enlarges metering pump, all bring positive effect.

Description of drawings

Fig. 1 is a kind of mechanical diaphragm metering pump with adjustable stroke structural representation of the present invention.

Fig. 2 is the A-A sectional view of Fig. 1.

Fig. 3 is the C-C sectional view of Fig. 1.

Fig. 4 is the B-B sectional drawing of Fig. 1.

Embodiment

Below in conjunction with accompanying drawing and embodiment the present invention is done and to further describe.

The special connecting rod of a kind of usefulness is regulated the mechanically actuated diaphragm metering pump of stroke, is made up of drive part (as shown in Figure 1), pump head part (as shown in Figure 2) and casing 15, worm shaft 27, motor 25, coupling 26 component such as (as shown in Figure 3).

Like Fig. 1, shown in Figure 2; Drive part mainly is made up of parts such as the axis of guide 1, axis of guide support 2, connecting rod 3, revolving sleeve 14, slide block 13, crank pin 4, worm gear 11, skewback 12, push rod shaft 10, worm-wheel bracket 5, feather key 6, hollow swivel nut 9, swivel nut support 7, handles 8, and axis of guide support 2, worm-wheel bracket 5, swivel nut support 7 are fixed on the casing 15.Connecting rod 3 is sleeved on the revolving sleeve 14 through rolling bearing, and worm gear 11 is fixed on the worm-wheel bracket 5 through rolling bearing, and skewback 12 links as a whole with push rod shaft 10; The center line of the axis of guide 1, worm gear 11, push rod shaft 10, hollow swivel nut 9 is all a center line, i.e. gyration center line L1; Push rod shaft 10 usefulness rolling bearings are fixed on the hollow swivel nut 9, and between push rod shaft 10 and the worm gear 11 feather key 6 are arranged, and push rod shaft 10 and skewback 12 are moved axially with hollow swivel nut 9, turn round with worm gear, and hollow swivel nut 9 does not turn round; Axially movable skewback 12 pulling slide blocks 13 produce in the guiding groove of worm gear 11 and move radially; In conjunction with shown in Figure 4; Change the radius of clean-up of crank pin 4; Crank pin 4 is linking

slide block

13 and 14 two parts of revolving sleeve, and skewback 12 pulling slide blocks 13 produce when moving radially, and the guiding groove of crank pin 4 pulling revolving sleeves 14 moves radially on the guide pad 25 of the axis of guide 1 synchronously; Producing revolving sleeve 14 geometric center lines is the variations of connecting rod 3 geometric center lines L2 to the connecting rod eccentric distance e of gyration center line, the variation that finally produces septum assembly 20 strokes.

As shown in Figure 2, the pump head part mainly is made up of parts such as oil sealing 17, pump head support 18, barrier film support ring 19, septum assembly 20, extension bar 21, spring 22, pump head 23, diaphragms 24; Pump head support 18 is fixed on the casing 15, and the periphery ring of oil sealing 17 is pressed on the housing by the pump head support, and extension bar 21 leans on double-screw bolt to connect with connecting rod 3, and the interior enclosure of oil sealing is pressed on the connecting rod; At the oil pocket internal memory removal of lubricant of casing, be used for lubricated worm screw, worm gear, oil sealing 17 is used for seal oil chamber; Septum assembly 20 connects with extension bar 21 usefulness double-screw bolts, puts spring 22 between septum assembly 20 and the pump head support 18; Pump head 23 is fixed on the pump head support 18, and the diaphragm 24 with barrier film support ring 19 and septum assembly compresses simultaneously, and there is pump intake A the lower end of pump head, and there is the exhaust port B of pump the upper end.

As shown in Figure 3, in conjunction with Fig. 1, shown in 2, worm shaft 27 connects with coupling 26 with motor shaft; Starting electrical machinery 25; 3 revolutions of crank pin 4 drivening rods are crossed in worm shaft 27 rotations and 11 rotations of transmission worm gear, the rotating tee of worm gear 11, because connecting rod 3 geometric center lines have eccentric distance e to the gyration center line; So the revolution of connecting rod makes septum assembly 20 produce the length of stroke of 2e.Handle with sleeve 8 moves axially hollow swivel nut 9; Push rod shaft 10 and skewback 12 are moved axially with hollow swivel nut 9, and with worm gear 11 revolutions, axially movable skewback 12 changes the radius of clean-up of crank pin 4; Connecting rod eccentric distance e and crank pin radius of clean-up R change synchronously.

Above-described embodiment only is used to explain technological thought of the present invention and characteristics; Its purpose makes those skilled in the art can understand content of the present invention and is implementing according to this; When can not only limiting claim of the present invention with present embodiment; Be all equal variation or modifications of doing according to disclosed spirit, still drop in the claim of the present invention.

Claims

1. mechanical diaphragm metering pump with adjustable stroke; Comprise drive part, pump head part, casing (15), coupling (26), worm shaft (27), motor (25); Worm shaft (27) connects with coupling (26) with motor shaft, and it is characterized in that: said drive part mainly is made up of the axis of guide (1), axis of guide support (2), connecting rod (3), revolving sleeve (14), slide block (13), crank pin (4), worm gear (11), skewback (12), push rod shaft (10), worm-wheel bracket (5), feather key (6), hollow swivel nut (9), swivel nut support (7), handle (8); Axis of guide support (2), worm-wheel bracket (5), swivel nut support (7) are fixed on the casing (15), and connecting rod (3) is sleeved on the revolving sleeve (14) through rolling bearing, and worm gear (11) is fixed on the worm-wheel bracket (5) through rolling bearing; Skewback (12) and push rod shaft (10) link as a whole, and the center line of the axis of guide (1), worm gear (11), push rod shaft (10), hollow swivel nut (9) is on same straight line; Push rod shaft (10) is fixed on the hollow swivel nut (9) with rolling bearing; And between push rod shaft (10) and the worm gear (11) feather key (6) is arranged; Push rod shaft (10) and skewback (12) are moved axially with hollow swivel nut (9); Push rod (10) and skewback (12) are with worm gear (11) revolution, and axially movable skewback (12) pulling slide block (13) produces in the guiding groove of worm gear (11) and moves radially.

2. mechanical diaphragm metering pump with adjustable stroke as claimed in claim 1 is characterized in that: said pump head part mainly is made up of oil sealing (17), pump head support (18), barrier film support ring (19), septum assembly (20), extension bar (21), spring (22), pump head (23), diaphragm (24); Pump head support (18) is fixed on the casing (15), and the periphery ring of oil sealing (17) is pressed on the casing (15) by pump head support (18); Extension bar (21) connects through the same connecting rod of double-screw bolt (3), and the interior enclosure of oil sealing (17) is pressed on the connecting rod (3); The same extension bar of septum assembly (20) (21) connects with double-screw bolt, puts spring (22) between septum assembly (20) and the pump head support (18); Pump head (23) is fixed on the pump head support (18), and the diaphragm (24) with barrier film support ring (19) and septum assembly compresses simultaneously; There is pump intake the lower end of pump head, and there is the exhaust port of pump the upper end.