CN102454599A

CN102454599A - Inward rotation gear pump and front-pull-type dismounting method thereof

Info

Publication number: CN102454599A
Application number: CN2010105284196A
Authority: CN
Inventors: 刘丁贵
Original assignee: Sunny King Machinery Co Ltd
Current assignee: Sunny King Machinery Co Ltd
Priority date: 2010-10-28
Filing date: 2010-10-28
Publication date: 2012-05-16

Abstract

The invention relates to an inward rotation gear pump and a front-pull-type dismounting method thereof, wherein the inward rotation gear pump comprises a bearing seat group and a pump element which are combined mutually; a driving shaft in the bearing seat group is provided with a mechanical shaft seal; the pump element is provided with a driving gear and a driven gear in the mutually combined enclosure and an edge cover, and is provided with a shaft seal chamber which extends to the outer part in a protrusion mode and is connected with the mechanical shaft seal. Additionally, when the internal maintaining is carried out, the bearing seat, a bearing, the driving shaft and the enclosure are not necessary to be separated for the used front-pull-type dismounting method, the pump element and the shaft seal chamber are convenient to dismount for maintaining personnel for internal maintaining, besides, the whole driving shaft still maintain the stable state after maintaining when the driving shaft rotates.

Description

In rotatable gear pump and preceding pull-type assembly and disassembly methods thereof

Technical field

The present invention is a kind of pump, refer to especially pump element can by driving gear one end tear open pull-type structure before the having of group in rotatable gear pump.

Background technique

Existing technology is in order in the pump assembly that the liquid pressurized delivered is provided; Installed and used mechanical shaft seal at internal body; The Seal cage that is installed in machinery through this mechanical shaft seal (for example: pump); Flow in the space that can restricted internal liquid only can rest in the pump to be designed, cause damage or other unpredictable injury of pump mechanism to place, non-design space to avoid flow of liquid.

The structure of existing pump unit is please referring to shown in Figure 6, in this structure; In the bearing support that is hollow 60, laterally be provided with a driving shaft 61, on the bearing support 60 of relative driving shaft 61 placements, be interval with fitting seat 621, each fitting seat 621 is provided with the installation of mounting hole 622 for bearing 62; This driving shaft 61 is located in each bearing 62 inside; In addition the end at bearing support 60 is provided with mechanical shaft seal 70 and gear pump group 80, in the general arrangement of this gear pump group 80, covers inside between 82 on casing 81 and limit and is provided with and cooperatively interacts and can be to the driving gear 83 and the driven gear 831 of liquid pressurized delivered; Casing 81 is being provided with an envelope box 811 towards bearing support 60 1 side one are outstanding; This envelope box 811 is positioned at bearing support 60 inside and after this end connects a shaft seal cover 812, is provided with this mechanical shaft seal 70, interconnects with casing 81 these sides and bearing support 60 again, and this driving shaft 61 runs through this mechanical shaft seal 70; Driving shaft 61 interconnects with front end termination and driving gear 83; And the rear end is connected with motor, can drive driving shaft 61 through motor power and rotate, and make the existing pump unit operation reach its pump function.

Because the pump assembly of existing technology, in use for some time, inner parts are if there is damage then must keep in repair; If the for example damage of mechanical shaft seal 70 or wearing and tearing and must dismantle maintenance the time; Because during its structure design, this mechanical shaft seal 70 is arranged in the axle envelope box 811 of casing 81 1 sides, therefore generally must pull down the motor that is positioned at rear side in advance; Pull down bearing cap and bearing fixing nut more in regular turn; Bearing support 60 and bearing 62 are pulled down towards the motor-side direction, begun at last mechanical shaft seal 70 is keeped in repair, another kind of then dismounting from the place ahead of bearing support 60; Then must the limit be covered 82, a plurality of members such as driving gear 83 and driving shaft 61 all pull down in the lump, can bearing support 60 inner set axle envelope members be keeped in repair;

Because the assembly and disassembly methods of existing technology and structure design relation must be pulled down the element of the forward and backward side of pump assembly and assemble; Cause all very being not easy and expending man-hour in that driving shaft 61 or gear pump group 80 are dismantled or assembled; Also cause the bearing after pulling down to damage shortcoming existence such as to change the new product installation in addition, and necessity of further improving is arranged.

Summary of the invention

The inventor is because the existing problem of pump assembly of aforementioned existing technology and design and a kind ofly can keep in repair the structure of tearing group open by the place ahead; So driving shaft and casing are not being torn open under the group on by bearing support, still can accomplished the maintenance of internals and keep the stability of driving shaft high speed rotating.

For reaching aforesaid goal of the invention, the technological means that the present invention used be to provide a kind of in rotatable gear pump before pull-type assembly and disassembly methods, its step comprises:

(1) pull down limit lid, with on the casing that is installed in bearing support and the limit lid that is positioned at the casing outside pull down from the open front of casing, and this limit set driven gear of lid is separated with driving gear;

(2) pull down driving gear, driving gear is separated with driving shaft, pull down from the open front in the casing outside again;

(3) take out axle envelope element, axle is sealed element separate, pull down through open front towards casing the place ahead and from the inboard after-opening of casing again with driving shaft;

(4) the limit lid assembling completion that can in regular turn axle be sealed element, driving gear and be provided with driven gear is oppositely assembled in member assembling according to aforesaid step.

In described rotatable gear pump before pull-type assembly and disassembly methods, wherein the aperture of going up set open front, the casing outside can supply master gear to pass through, and the aperture of set after-opening can supply an axle envelope element to pass through on the casing inboard.

In described rotatable gear pump before pull-type assembly and disassembly methods, wherein take out in the axle envelope element step, the axle envelope chamber of at first axle being sealed element is separated and is separated with shaft seal cover with the step place of the inboard after-opening of casing respectively, mechanical shaft seal and shaft seal cover is pulled down again.

Another technological means that the present invention used be to provide a kind of in rotatable gear pump, it includes a bearing support group, envelope element and a pump element;

This bearing support group includes a bearing support and a driving shaft, and wherein this bearing support is hollow shape, and its front end and rear end have an opening respectively, and portion is provided with bearing within it;

This driving shaft is arranged on the bearing, and two ends lay respectively at the opening of bearing support;

This envelope element includes a mechanical shaft seal; It is set on this driving shaft and an end and driving shaft are fixed; Be provided with a shaft seal cover in addition; It is hollow and annular and an end is connected with the other end of mechanical shaft seal, the other end of this shaft seal cover be connected with one be hollow and annular axle envelope box, the outstanding coupling collar that is provided with of the other end of this envelope box;

This pump element has a casing, one side lid, a driven gear, a driving gear and a retaining ring, and this interior is formed with a room and two ends are provided with the opening that communicates, and this envelope box can wear and be positioned at an opening; Utilize several fixed blocks to run through casing and be combined on the coupling collar of envelope box, this limit lid is fixed on another opening of casing, and this driven gear rotates with respect to the limit lid; And the rotation that cooperatively interacts with this driving gear; Driving gear is provided with conical ring outside stretching towards driving shaft one pleurapophysis, is formed with an axis hole in this outer conical ring, and the outside is provided with several perforation; Be arranged with a retaining ring outside on the conical ring; The inboard of this retaining ring is formed with the inner cone anchor ring that cooperates with outer conical ring, on retaining ring, is provided with screw with respect to punch position, utilizes several fixed blocks to run through the perforation of driving gear and the screw of retaining ring mutually combines.

Rotatable gear pump in described, wherein the both ends open bore of casing is different, in its room, is formed with a step, and the coupling collar of this envelope chamber can be positioned at the step place.

Utilization through the aforementioned techniques means; When members such as the pump element internals of pump among the present invention or mechanical shaft seal have damage to keep in repair; Under the maintenance work of not dismantling members such as casing, bearing support, bearing and driving shaft; The casing front end that the maintenance man can be installed from the bearing support or the front end of driving shaft are pulled down the limit lid and the set driven gear thereof of pump element, moreover can the fixed block on the driving gear be rotated and pull down driving gear retaining ring is no longer urged in outer conical ring, and then can driving gear be pulled down; So that can the member of interior be keeped in repair; Also can further pull down axle envelope chamber and axle envelope element in addition so that keep in repair, after accomplishing maintenance, give reverse assembling again and get final product, owing to aforementioned casing and bearing support, bearing and driving shaft maintenance are combined under the stationary state; And its maintenance work is not all moved or the driving shaft and the corresponding bearing of dismounting bearing support group; So each member of group is torn in structure design pull-type before of the present invention open, can keep its center of rotation, make its rotation still keep stability.

Description of drawings

Fig. 1 is a generalized section of the present invention.

Fig. 2 is a partial component exploded view of the present invention.

Fig. 3 is a cut-away section schematic representation of the present invention.

Fig. 4 is the three-dimensional generalized section of the present invention.

Fig. 5 is the schematic perspective view of pump element of the present invention.

Fig. 6 is the generalized section of existing technology.

[primary component symbol description]

10 bearing supports, 11,13 bearings

12 fitting seats, 14 bearing caps

20 driving shafts, 21 columns

30 envelope element 31 mechanical shaft seals

32 shaft seal covers

33 envelope chamber 331 coupling collars

332 fixed blocks

50 pump elements, 51 casings

511 rooms, 512 steps

513 open fronts, 514 after-openings

521 stationary axle are covered on 52 limits

53 driven gears, 531 axis holes

54 driving gears, 540 axis holes

541 outer conical ring 542 perforation

55 retaining rings, 551 inner cone anchor rings

552 screws, 56 fixed blocks

60 bearing supports, 61 driving shafts

62 bearings, 621 bearing supports

622 mounting holes, 70 mechanical shaft seals

80 gear pump groups, 81 casings

811 envelope box 812 shaft seal covers

83 driving gears are covered on 82 limits

831 driven gears

Embodiment

Below cooperate graphic and the preferred embodiments of the present invention, further setting forth the present invention is to reach the technological means that predetermined goal of the invention is taked.

Referring to Fig. 1 and shown in Figure 2; Rotatable gear pump and preceding pull-type assembly and disassembly methods thereof in the present invention designed; Wherein should in the essential structure of rotatable gear pump, it includes a bearing support group, envelope element 30 and a pump element 50, is equipped with a driving shaft 20 in the bearing support 10 of this bearing support group; The two ends of this driving shaft 20 protrude into the outside of bearing support 10; At an end of driving shaft 20 and be positioned at place, bearing support 10 front sides and be provided with said axle envelope element 30, and at bearing support 10 this pump element 50 is installed, pump element 50 is provided with a casing 51; These casing 51 both sides have respectively one be positioned at the front side open front 513 and be positioned at the after-opening 514 of rear side adjacent to axle envelope element 30; Casing 51 is provided with limit lid 52 in open front 513 again, and is provided with interactive driving gear 54 and driven gear 53 in inside, this driving gear 54 and driving shaft 20 ends be separable mutually combine fixing.

In addition, the design of the pore size of the aforementioned open front that designs 513 can supply driving gear 54 or axle envelope element 30 to pass through, and in wherein a kind of specific embodiment design, its aperture is greater than the external diameter of driving gear 54 external diameters and axle envelope element 30.

The present invention apply in pull-type assembly and disassembly methods before the rotatable gear pump, its step comprises:

(1) pull down limit lid, with on the casing that is installed in bearing support 10 51 and the limit lid 52 that is positioned at casing 51 outsides pull down from the open front 513 of casing 51, and make this limit cover 52 set driven gears 53 to separate with driving gear 54;

(2) pull down driving gear, driving gear 54 is separated with driving shaft 20, pull down by open front 513 places in casing 51 outsides again;

(3) take out axle envelope element, axle is sealed element 30 separate, pull down through open front 513 towards casing 51 the place aheads and from casing 51 inboard after-openings 514 again with driving shaft 20;

(4) the limit lid 52 assembling completion that can in regular turn axle be sealed element 30, driving gear 54 and be provided with driven gear 53 are oppositely assembled in member assembling according to aforesaid step.

A kind of in order to rotatable gear pump in the pull-type assembly and disassembly methods before the embodiment of the present invention, wherein a kind of specific embodiment can be designed to the structure of the following stated:

This bearing support group includes a bearing support 10 and a driving shaft 20; Wherein this bearing support 10 be a hollow casing and forward and backward two ends have respectively one with the inner opening that communicates, internal layout is provided with two fitting seats 12 in its back-end, on each fitting seat 12, is respectively equipped with a

bearing

11,13; This driving shaft 20 wears to be positioned at two

bearings

11,13 and to cooperate and is provided with hold-doun nut; In addition, on bearing support 10 and with respect to the outside of two

bearings

11,13, be respectively equipped with a bearing cap 14, make this driving shaft 20 can be positioned on the bearing support 10; The two ends of this driving shaft 20 protrude into the outside of bearing support 10 respectively from opening; The rear end of driving shaft 20 can (for example: motor) be connected, to drive this driving shaft 20 rotations, front end has a column 21 in addition with a power source;

This axle envelope element 30; Cooperation is referring to shown in Figure 3; It includes a mechanical shaft seal 31, a shaft seal cover 32 and an envelope chamber 33, and this mechanical shaft seal 31 has the single-revolution ring that can replace contact each other and a retaining ring and is installed in (this partly is configured to existing technology, repeats no more) on this driving shaft 20; The pivoted loop and the driving shaft 20 of mechanical shaft seal 31 1 sides mutually combine fixing; And the retaining ring of opposite side and this shaft seal cover 32 1 ends interconnect, and bearing support 10 is provided with this envelope chamber 33 sentencing separable mode with respect to a front end that is provided with axle envelope element 30, and this mechanical shaft seal 31 is positioned at an axle envelope chamber 33; The other end and the shaft seal cover 32 of axle envelope chamber 33 interconnect, and this envelope chamber 33 is formed with an outwards outstanding coupling collar 331 at the end away from shaft seal cover 32;

This pump element 50 cooperates referring to Fig. 4 and shown in Figure 5, and it has a casing 51, covers 52, one driven gear 53, a driving gear 54, reaches a retaining ring 55 on one side;

This casing 51 is hollow shape and is removably installed at the front opening place of bearing support 10; Be respectively equipped with open front 513 and the after-opening 514 that is interconnected at its two ends; The inboard of open front at one end 514 is formed with a room 511; The bore of the other end after-opening 514 is formed with a step 512 less than the diameter of room 511 at after-opening 514 places of casing 51, and these envelope chamber 33 1 ends are positioned at step 512 places; In addition; Be provided with and room 511 inlet communicating and outlet in the periphery of casing 51, the step 512 that runs through casing 51 with several fixed blocks 332 again combines to be fixed on the end face of coupling collar 331, makes these envelope chamber 33 1 ends can wear and combine to be fixed on the opening of casing 51;

This limit lid 52 is equipped with a stationary axle 521 on the one of which side, this driven gear 53 is provided with the axis hole 531 that runs through, and is set on this stationary axle 521 with axis hole 531 and rotates, and the axle center of the axle center of this stationary axle 521 and driving shaft 20 is not positioned at same center line;

Cooperation is referring to Fig. 1, Fig. 2 and shown in Figure 4; This driving gear 54, one of which side are formed with and the intermeshing flute profile of the flute profile of driven gear 53, its opposite side central authorities be provided with the axis hole 540 that runs through and on this side outwards projection be provided with conical ring 541 outside; This axis hole 540 is positioned at outer conical ring 541 inboards; This axis hole 540 is at least one elongated slot of being axially arranged with of wall, and conical ring 541 outsides are provided with several perforation that runs through 542 on the side of driving gear 54 and outside being positioned at; In perforation 542, (for example: screw) be equipped with fixed block 56; This retaining ring 55, its central authorities cooperate the conical surface of outer conical ring 541 to be formed with an inner cone anchor ring 551, are provided with several screws 552 in the periphery and with respect to perforation 542 positions in addition; This retaining ring 55 be set on the outer conical ring 541 with its inner cone anchor ring 551 and with the adjacent side of driving gear 54 distance at interval, aforesaid fixed block 56 runs through perforation 542 and mutually combines with screw 552.

This driving gear 54 is arranged in the room 511; The column 21 of this driving shaft 20 wears and is positioned at axis hole 540; Can be loose fit between the two; Make retaining ring 55 approaching at each fixed block 56 of rotation towards driving gear 54; The conical surface design of outer conical ring 541 of utilization this moment and inner cone anchor ring 551 can make the aperture of axis hole 540 dwindle to reach urgent and be fixed on the column 21; Can make driving gear 54 be positioned also can prevent left and right sidesing shifting on the column 21 through conical surface packing, the apparent surface at driving gear 54 and column 21 is provided with the setting (this is not described in detail for existing technology) that groove can supply the corresponding key of shape in addition, makes the power of driving shaft 20 can drive this driving gear 54 rotations.In addition, be provided with the limit lid 52 of driven gear 53, its open front 513 places that are mounted on the room 511 of casing 51 seal.

The above only is the preferred embodiments of the present invention; Not being that the present invention is done any pro forma restriction, though the present invention through the preferred embodiment exposure as above, yet is not in order to limit the present invention; Any those skilled in the art; In the scope that does not break away from technological scheme of the present invention, make a little change or be modified to the equivalent embodiment of equivalent variations when the technology contents of above-mentioned announcement capable of using, be the content that does not break away from technological scheme of the present invention in every case;, all still belong in the scope of technological scheme of the present invention any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present invention.

Claims

In one kind rotatable gear pump before pull-type assembly and disassembly methods, it is characterized in that may further comprise the steps:

1) pull down limit lid, with on the casing that is installed in bearing support and the limit lid that is positioned at the casing outside pull down from the open front of casing, and this limit set driven gear of lid is separated with driving gear;

2) pull down driving gear, driving gear is separated with driving shaft, pull down from the open front in the casing outside again;

3) take out axle envelope element, axle is sealed element separate, pull down through open front towards casing the place ahead and from the inboard after-opening of casing again with driving shaft;

4) the limit lid assembling completion that can in regular turn axle be sealed element, driving gear and be provided with driven gear is oppositely assembled in member assembling according to aforesaid step.
2. in according to claim 1 rotatable gear pump before pull-type assembly and disassembly methods, it is characterized in that the aperture that set open front is gone up in the casing outside can supply driving gear to pass through, and the aperture of set after-opening can supply an axle envelope element to pass through on the casing inboard.
3. in according to claim 1 and 2 rotatable gear pump before pull-type assembly and disassembly methods; It is characterized in that; In taking out axle envelope element step; The axle envelope chamber of at first axle being sealed element is separated and is separated with shaft seal cover with the step place of the inboard after-opening of casing respectively, mechanical shaft seal and shaft seal cover is pulled down again.
4. rotatable gear pump in a kind is characterized in that: include a bearing support, a driving shaft, envelope element and a pump element;

This bearing support is hollow shape, and its front end and rear end have an opening respectively, and portion is provided with bearing within it;

This driving shaft is arranged on the bearing, and two ends lay respectively at the opening of bearing support;

This envelope element includes a mechanical shaft seal; It is set on this driving shaft and an end and driving shaft are fixed; And be provided with a shaft seal cover; It is hollow and annular and an end is connected with the other end of mechanical shaft seal, the other end of this shaft seal cover be connected with one be hollow and annular axle envelope box, the outstanding coupling collar that is provided with of the other end of this envelope box;

This pump element has a casing, one side lid, a driven gear, a driving gear and a retaining ring; This interior is formed with a room and two ends are provided with the opening that communicates; This envelope box can wear and be positioned at an opening; Utilize several fixed blocks to run through casing and be combined on the coupling collar of envelope box, this driving gear is arranged in the casing and an end of driving shaft mutually combines, and this limit lid is fixed on another opening of casing; This driven gear rotates with respect to limit lid, and the rotation that cooperatively interacts with this driving gear.
5. rotatable gear pump is characterized in that in according to claim 4, and the both ends open bore of casing is different, in its room, is formed with a step adjacent to the less end of opening bore, and the coupling collar of this envelope chamber can be positioned at the step place.
According to claim 4 or 5 described in rotatable gear pump; It is characterized in that; This driving gear is provided with conical ring outside stretching towards driving shaft one pleurapophysis, be formed with in this outer conical ring one with the sheathed axis hole of driving shaft, and the outside is provided with several perforation; Be arranged with a retaining ring outside on the conical ring; The inboard of this retaining ring is formed with the inner cone anchor ring that cooperates with outer conical ring, on retaining ring, is provided with screw with respect to punch position, runs through the perforation of driving gear and the screw of retaining ring mutually combines fixing to replace outer conical ring and driving shaft with several fixed blocks.