CN206159009U - Cam rotor pump end cover assembly structure - Google Patents

Abstract

Cam rotor pump end cover assembly structure, including the pump cover, pump cover rachis seat and gland, pump cover and pump cover rachis seat all have driving shaft and the through -hole of driven shaft on the dress cam rotor pump, the pump cover lid is adorned in the terminal surface of the pump body outer end of cam rotor pump, the setting on the cam rotor pump the driving shaft and driven epaxial outside two sets of mechanical seal wear to establish in two through -holes of pump cover, anti -rotating spring seat on the outer mechanical seal passes through screw and pump cover fixed connection, the outer end of pump cover is fixed with pump cover rachis seat, the outer end of pump cover is cavity, have the pump cover of stretching into outer end open -ended part on the pump cover rachis seat and press on driving shaft or driven shaft, paste to lean on and to be equipped with the annular groove in the outer end of stretching into pump cover outer end opening portion of driving shaft or driven shaft, outer linmiting shaft sleeve has set in the annular groove, two outer linmiting shaft sleeve are fixed through the clamp plate respectively, the outside that corresponds two clamp plates is fixed through two glands and pump cover rachis seat respectively.

Description

Lobed rotor pump end cap assembling structure

Technical field

The utility model belongs to positive displacement pump field, especially relevant with a kind of lobed rotor pump end cap assembling structure.

Background technology

Lobed rotor pump has the property of positive discharge capacity, and flow does not change with economy, by between rotor and the pump housing Relative motion changing the volume of work.Patent publication No. discloses a kind of lobed rotor pump end cap for the A of CN 104675695 Assembling structure, including pump cover, the pump housing, driving shaft, driven shaft, gear, cam, bearing, bearing housing, mechanical seal and sealing Lid, is provided with driving shaft and driven shaft in bearing housing, the pump housing is fixedly mounted on bearing housing, described driving shaft and driven The drive end that two bearings, driving shaft and driven shaft are mounted on axle is mounted on gear, and the two is connected by gear drive, The anti-drive end of driving shaft and driven shaft is mounted on cam, and pump cover is arranged on the pump housing, on described driven shaft and driving shaft Mechanical seal is cased with, mechanical seal is arranged in closure, and the cam on driving shaft is conjugated each other with the cam on driven shaft Cam.But the lobed rotor pump end cap assembling structure mechanical seal is arranged on the circumference of axle, its leakproof seal effect is poor, is situated between Axle is easily corroded in matter infiltration, and its pump cover for arranging is less to the position-limiting action of driving shaft and driven shaft, causes cam in axle To displacement, therefore applicant provides one kind with support limit effect, so as to prevent cam axial displacement and one The lobed rotor pump end cap assembling structure of the convenient dismounting of formula.

Utility model content

The shortcoming of the position-limiting action difference existed for existing lobed rotor pump, the utility model aims to provide one kind to be had The lobed rotor pump end cap assembling structure of position-limiting action.

For this purpose, the utility model is employed the following technical solutions：Lobed rotor pump end cap assembling structure, is characterized in that, including Pump cover, pump cover end axle bed and gland, pump cover and described pump cover end axle bed all have install driving shaft on lobed rotor pump and The through hole of driven shaft, the end face of pump housing outer end of the pump cover lid loaded on lobed rotor pump, the driving shaft being arranged on lobed rotor pump It is located in two through holes of pump cover with two groups of outer mechanical seals on driven shaft, the anti-turn spring seat in outer mechanical seal passes through Screw is fixedly connected with pump cover, and the outer end of pump cover is fixed with described pump cover end axle bed, and the outer end of described pump cover is in hollow, pump There is the part of the pump cover outer end opening for stretching into described on the axle bed of lid end and be pressed against on described driving shaft or driven shaft, recline Annular groove is provided with the outer end for stretching into pump cover outer end opening part of driving shaft or driven shaft, outer limit is equipped with annular groove Position axle sleeve, two outer limit shaft sleeves are fixed respectively by pressing plate, and the outside of two pressing plates of correspondence is respectively by two glands and institute The pump cover end axle bed stated is fixed.

Described mechanical seal includes rotating seat, outer rotating seat, stationary seat and outer stationary seat, described driving shaft or driven Axle is coordinated by keyway to be fixed with the cam, and described outer rotating seat is set on driving shaft or driven shaft, outer rotating seat Inner face is resisted against on the key of driving shaft or driven shaft and cam engagement, and the outer peripheral face of outer rotating seat forms stepped recesses, is in The installation position for installing anti-turn spring seat, the stationary seat and rotating seat is sequentially formed on the outer rotating seat outer peripheral face of bottom, Described rotating seat is placed in the bottom land of described stepped recesses and is connected with described outer rotating seat by elastic cylindrical pin, is prevented Turn the outer end of spring base by retainer ring spacing, the peace for installing the outer stationary seat is formed between anti-turn spring seat and stationary seat It behave affectedly, described outer stationary seat is arranged in the installation cavity, spring, bullet is set between outer stationary seat and described anti-turn spring seat Spring is axially parallel with described driving shaft, and spring one end reclines with described anti-turn spring seat, the other end and the one of outer stationary seat End face reclines, and the tactile wall that the other end of outer stationary seat and the stationary seat overhang out is contradicted, described outer stationary seat and stationary ring Seat is set with by spring washer, and spring washer fixed by screw with described anti-turn spring seat, and spring washer is quiet with described O-ring is set between ring seat, the outer peripheral face of spring washer arrange the O-ring that arranges in the cannelure for accommodating O-ring, cannelure with Pump cover on institute's positive displacement pump coordinates.

Following beneficial effect can be reached using the utility model：The utility model is improved to existing pump cover, by It is spiral rotating in existing cam, cam has axial force, by the attachment structure of pump cover, it is possible to achieve the limit to cam Position is fixed.The utility model passes through to arrange mechanical seal, so as to improve the sealing of lobed rotor pump end cap assembling structure, so as to Prevent medium from penetrating into and enter main shaft, mechanical seal is realized spacing by outer back-up ring, and outer back-up ring is realized by pump cover fit structure To the spacing of cam, so as to improve the precision of lobed rotor pump end cap assembling structure pumped (conveying) medium.

Description of the drawings

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the structural representation of outer mechanical seal of the present utility model.

Specific embodiment

Specific embodiment of the present utility model is described in detail below in conjunction with the accompanying drawings.

As shown in Fig. 1～Fig. 2, the utility model includes pump cover 1, pump cover end axle bed 2 and gland 3, pump cover 1 and pump cover end axle Seat 2 all has the through hole of the driving shaft and driven shaft installed on lobed rotor pump, the pump housing 14 of the lid loaded on lobed rotor pump of pump cover 1 The end face of outer end, the outer mechanical seal 4 of two be arranged on the driving shaft and driven shaft on lobed rotor pump group is located in pump cover 1 In two through holes, the anti-turn spring seat 9 in outer mechanical seal 4 is fixedly connected by screw with pump cover 1, the outer end of pump cover 1 and pump Lid end axle bed 2 is fixed, and the outer end of pump cover 1 has on pump cover end axle bed 2 and stretch into the part of the outer end opening of pump cover 1 and press in hollow Lean against on driving shaft or driven shaft, the outer end for stretching into pump cover outer end opening part for abutting in driving shaft or driven shaft is provided with annular Groove, is equipped with outer limit shaft sleeve 15 in annular groove, two outer limit shaft sleeves 15 are fixed respectively by pressing plate 16, correspondence two The outside of pressing plate 16 is fixed respectively by two glands 3 with pump cover end axle bed 2.Outer mechanical seal includes rotating seat 5, outer rotating seat 7th, stationary seat 6 and outer stationary seat 8, driving shaft or driven shaft are coordinated by keyway to be fixed with cam, and outer rotating seat 7 is set in actively On axle or driven shaft, the inner face of outer rotating seat 7 is resisted against on the key of driving shaft or driven shaft and cam engagement, outer rotating seat 7 Outer peripheral face formed stepped recesses, sequentially form on the outer peripheral face of outer rotating seat 7 of bottom for install anti-turn spring seat 9, The installation position of the stationary seat 6 and rotating seat 5, rotating seat 5 be placed in the bottom land of stepped recesses and by elastic cylindrical pin 11 with Outer rotating seat 7 connects, and the outer end of anti-turn spring seat 9 is spacing by back-up ring 12, is formed between anti-turn spring seat 9 and stationary seat 6 and is used In the installation cavity for installing the outer stationary seat 8, outer stationary seat 8 is arranged in the installation cavity, outer stationary seat and anti-turn spring seat it Between spring 13 is set, spring 13 is axially parallel with driving shaft, and the one end of spring 13 reclines with anti-turn spring seat 9, and the other end is quiet with outer The end face of ring seat 8 reclines, and the other end of outer stationary seat 8 contradicts with the tactile wall that the stationary seat 6 overhangs out, outer stationary seat 8 Be set with by spring washer 10 with stationary seat 6, spring washer 10 is fixed by screw with anti-turn spring seat 9, spring washer 10 with O-ring is set between stationary seat 6, and the outer peripheral face of spring washer 10 arranges the O arranged in the cannelure for accommodating O-ring, cannelure Type circle coordinates with the pump cover on institute's positive displacement pump.

Claims (2)

1. lobed rotor pump end cap assembling structure, it is characterised in that：Described lobed rotor pump end cap assembling structure includes pump cover （1）, pump cover end axle bed（2）And gland（3）, pump cover（1）With described pump cover end axle bed（2）All have and install on lobed rotor pump Driving shaft and driven shaft through hole, pump cover（1）The pump housing of the lid loaded on lobed rotor pump（14）The end face of outer end, is arranged on cam Two groups of outer mechanical seals on driving shaft and driven shaft on impeller pump（4）It is located in pump cover（1）Two through holes in, outer machinery Sealing（4）On anti-turn spring seat（9）By screw and pump cover（1）It is fixedly connected, pump cover（1）Outer end and described pump cover end Axle bed（2）Fixed, described pump cover（1）Outer end be in hollow, pump cover end axle bed（2）It is upper that there is the pump cover described in stretching into（1）Outward The part of end opening is simultaneously pressed against on described driving shaft or driven shaft, and abut in driving shaft or driven shaft stretches into pump cover outer end The outer end of opening portion is provided with annular groove, and outer limit shaft sleeve is equipped with annular groove（15）, two outer limit shaft sleeves（15） Pass through pressing plate respectively（16）It is fixed, two pressing plates of correspondence（16）Outside respectively pass through two glands（3）With described pump cover end Axle bed（2）It is fixed.

2. lobed rotor pump end cap assembling structure according to claim 1, it is characterised in that：Described outer mechanical seal bag Include rotating seat（5）, outer rotating seat（7）, stationary seat（6）With outer stationary seat（8）, driving shaft or driven shaft by keyway coordinate with it is convex Wheel is fixed, described outer rotating seat（7）It is set on driving shaft or driven shaft, outer rotating seat（7）Inner face be resisted against actively On the key of axle or driven shaft and cam engagement, outer rotating seat（7）Outer peripheral face formed stepped recesses, in the outer rotating seat of bottom （7）Sequentially form on outer peripheral face for installing anti-turn spring seat（9）, the stationary seat（6）And rotating seat（5）Installation position, institute The rotating seat stated（5）It is placed in the bottom land of described stepped recesses and by elastic cylindrical pin（11）With described outer rotating seat （7）Connection, anti-turn spring seat（9）Outer end pass through back-up ring（12）It is spacing, anti-turn spring seat（9）And stationary seat（6）Between formed For installing the outer stationary seat（8）Installation cavity, described outer stationary seat（8）In being arranged on the installation cavity, outer stationary seat with Spring is set between described anti-turn spring seat（13）, spring（13）It is axial parallel with described driving shaft, spring（13）One end With described anti-turn spring seat（9）Recline, the other end and outer stationary seat（8）End face recline, outer stationary seat（8）The other end Face and the stationary seat（6）The tactile wall for overhanging out is contradicted, described outer stationary seat（8）And stationary seat（6）By spring washer （10）Suit, spring washer（10）By screw and described anti-turn spring seat（9）It is fixed, spring washer（10）It is quiet with described Ring seat（6）Between O-ring, spring washer are set（10）Outer peripheral face the cannelure for accommodating O-ring is set, arrange in cannelure O-ring coordinates with the pump cover on institute's positive displacement pump.