CN105201847A

CN105201847A - Diaphragm type oilless vacuum pump

Info

Publication number: CN105201847A
Application number: CN201510581562.4A
Authority: CN
Inventors: 余文凌
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-09-11
Filing date: 2015-09-11
Publication date: 2015-12-30

Abstract

The invention discloses a diaphragm type oilless vacuum pump which realizes suction and discharge functions of a pump by using the principle of an eccentric mechanism, and which is formed by a stator chamber, a pump chamber and a rotor running through inner cavities of the stator chamber and the pump chamber; a stator with an eccentric hole is fixedly mounted in the stator chamber; the pump chamber is fixedly mounted on the stator chamber and is coaxial with the stator chamber, a separating tongue sleeve is fixedly mounted at the inner cavity of the pump chamber, and the separating tongue sleeve is provided with a pair of separating tongues separating a high pressure area from a low pressure area in the pump chamber; the rotor is provided with a C-shaped passage wherein plungers are mounted in radial through holes corresponding to the stator, and an elastic diaphragm sleeve sleeves the inner end of each plunger, so that lubricating oil in the stator chamber is absolutely separated from gas in the pump chamber, thus completely eradicating the pollution of the oil to the air; meanwhile, the pump belongs to a positive displacement pump, and a valve structure is cancelled, so the efficiency is further improved, and the pump belongs to an energy-saving product; besides, the multiple plungers are uniformed arranged, so stable operation, no noise and no vibration are realized.

Description

Diaphragm type oil-free vacuum pump

Technical field

The present invention relates to a kind of displacement pump, a kind of diaphragm type oil-free vacuum pump.

Background technique

Reciprocating vacuum pump, due in compact structure, suction capactity by force, is subject to extensive use at present, is subject to extensive use especially at food vacuum packaging field; But known reciprocating vacuum pump needs oil lubrication due to the to-and-fro motion of piston, therefore easily produces pollution to food package, this is when current lay special stress on food security, more wants to prevent.

Summary of the invention

The object of the invention is to: the shortcoming existed for above-mentioned reciprocating vacuum pump, propose the diaphragm type oil-free vacuum pump that lubricant oil and air are thoroughly isolated by a kind of barrier film.

In order to achieve the above object, diaphragm type oil-free vacuum pump of the present invention, is made up of stator chamber 1, pump chamber 2 and the rotor 3 through above-mentioned two indoor chambeies; The stator 4 with eccentric opening is fixedly mounted with in described stator chamber 1; Described pump chamber 2 to be packed on stator chamber 1 and coaxial with it, and the inner chamber of this pump chamber 2 is fixedly mounted with the cut water cover 5 of an adjustable position vertically, and described cut water cover 5 is shaped with a pair by the separated cut water 6 in the zone of high pressure in pump chamber 2 and low pressure area; Its special way is: the position of the corresponding stator of described rotor 34 is shaped with multiple uniform radial direction through hole 7, corresponding cut water 6 position is also shaped with radial direction through hole 8 that is equal with described radial direction through hole 7 quantity, axis being parallel, often pair of radial direction through hole 7 and radial direction through hole 8 central passage 9 is communicated with, and forms C font passage; Described radial direction through hole 7 is built with plunger 10, and the inner of this plunger 10 is set with flexible diaphragm case 11.

The quantity of radial hole 7 uniform on the described rotor 3 in the technology of the present invention solution can be arranged to the odd numbers such as 3,5,7.

The width of the described cut water 6 in the technology of the present invention solution can equal the diameter of radial direction through hole 8.

The outer end of the described plunger 10 in the technology of the present invention solution can contact by the eccentric opening inwall of roller 12 with described stator 4.

Described elastic diaphragm cover 11 in the technology of the present invention solution can be packed on rotor 3 by guide pin bushing 13.

The installation of the described elastic diaphragm cover 12 in the technology of the present invention solution can be pre-stretching.

Described cut water cover 5 in the technology of the present invention solution is shaped with the chamber 15 that can fill shaft seal 14.

Multiple uniform radial direction through hole 7 on described rotor 3 in the technology of the present invention solution axially can be arranged to many rows along rotor 3, as two rows, three rows etc.

The present invention utilizes eccentric stiffener principle, realize the suction function of pump, when power rotor driven 3 rotates, plunger 10 and elastic diaphragm overlap 11 around stationary torus inwall while the radial direction through hole 7 rotated on an edge rotor 3 is reciprocating, reciprocating stroke is two times of the throw of eccentric of stator 4, the to-and-fro motion of plunger 10 produces volume-variation, by C font passage from the suction chamber suction gas of pump chamber 2 again from discharge side Exhaust Gas; Due to the obstruct of the cut water 6 in pump chamber 2, make to produce isolation between discharge side and suction chamber; The angled layout of multiple plungers 10, inhales, is vented steady no pulse, vibrate little, noise is low.

Advantage of the present invention is: the flexible diaphragm case 11 due to device, makes the lubricant oil in stator chamber 1 and the gas in pump chamber 2 produce and isolate, and has stopped the pollution of oil to air, meanwhile, the invention belongs to displacement pump, energy-efficient; In addition, vacuum pump of the present invention eliminates valve arrangement, and adopts multi-plunger to be evenly arranged, and pump is operationally without voice, friction.

Accompanying drawing explanation

Fig. 1 is the structural drawing of the embodiment of the present invention.

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

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

Fig. 4 is the C-C sectional view of Fig. 1.

Fig. 5 is the partial enlarged drawing of plunger 10.

Fig. 6 is the structural drawing that three organ timbering plugs 10 are arranged to vertically by rotor 3.

Embodiment

Fig. 1 is the structural drawing of the embodiment of the present invention, and Fig. 2 is the A-A sectional view of Fig. 1, and Fig. 3 is the B-B sectional view of Fig. 1, and Fig. 4 is the C-C sectional view of Fig. 1.

The stator 4 be fixedly mounted with eccentric opening is shown in stator chamber 1 in figure; Pump chamber 2 is packed on stator chamber 1 also coaxial with it, and the inner chamber of this pump chamber 2 is fixedly mounted with a cut water cover 5, and cut water cover 5 is shaped with a pair by the separated cut water 6 in the zone of high pressure in pump chamber 2 and low pressure area; Rotor 3 is through above-mentioned two indoor chambeies, and be bearing on bearing 16,17, the position of the corresponding stator of rotor 34 is shaped with multiple uniform radial direction through hole 7, corresponding cut water 6 position is also shaped with radial direction through hole 8 that is equal with radial direction through hole 7 quantity, axis being parallel, often pair of radial direction through hole 7 and radial direction through hole 8 central passage 9 is communicated with, and the axis of three is all on same cutting plane; Form C font passage, radial direction through hole 7 is wherein built with plunger 10, the outer end of plunger 10 contacts with the eccentric opening inwall of stator 4 by roller 12, the inner of plunger 10 is set with flexible diaphragm case 11, elastic diaphragm cover 11 is packed on rotor 3 by guide pin bushing 13, and guide pin bushing 13 also play the guiding role to the to-and-fro motion of plunger 10; The installation of diaphragm case 11 is pre-stretchings, namely diaphragm case 11 pairs of plungers 10 have original rebounding force, make it press to the eccentric opening inwall of stator 4 all the time, rotor 3, in rotary course, utilizes the rebounding force of the centrifugal force of plunger 10 and diaphragm case 11 plunger 10 to be pressed to the eccentric opening inwall of stator 4; The roller 12 of plunger 10 outer end can reduce friction and heating, and wherein elastic diaphragm cover 11 can make of elastic caoutchouc or elastomeric plastics.

Stifle 18 is for shutoff radial direction through hole 7; Cut water cover 5 there is chamber 15, for installing shaft seal 14, by the axial position of adjustment cut water cover 5, the sealing load of shaft seal 14 pairs of rotor 3 cylindricals can be regulated.

Cut water 6 width shown in figure in pump chamber 2 equals the diameter of radial direction through hole 8.

Fig. 5 is the partial enlarged drawing of plunger 10, and roller 12 is equipped with in the outer end showing plunger 10 in figure, and roller 12 rotates on pin 19; The inner of plunger 10 is set with flexible diaphragm case 11, and elastic diaphragm cover 11 is packed on rotor 3 by guide pin bushing 13, and guide pin bushing 13 also play the guiding role to the to-and-fro motion of plunger 10.Also show stator 4 both sides spacer ring 20 in figure to fix.

Fig. 6 is the structural drawing that three organ timbering plugs 10 are arranged to vertically by rotor 3, and showing rotor 3 in figure has three organ timbering plugs 10 vertically, and each row has multiple radial direction through hole 7 that is uniform, in-built plunger 10, and this structure is used for the rate of air sucked in required that is multiplied.

Claims

1. a diaphragm type oil-free vacuum pump, is made up of stator chamber (1), pump chamber (2) and the rotor (3) through above-mentioned two indoor chambeies; The stator (4) with eccentric opening is fixedly mounted with in described stator chamber (1); It is upper and coaxial with it that described pump chamber (2) is packed in stator chamber (1), the inner chamber of this pump chamber (2) is fixedly mounted with the cut water cover (5) of an adjustable position vertically, described cut water cover (5) is shaped with a pair by the zone of high pressure in pump chamber (2) and low pressure area separated cut water (6); It is characterized in that: the position of described rotor (3) corresponding stator (4) is shaped with multiple uniform radial direction through hole (7), corresponding cut water (6) position is also shaped with radial direction through hole (8) that is equal with described radial direction through hole (7) quantity, axis being parallel, often pair of radial direction through hole (7) is communicated with a central passage (9) with radial direction through hole (8), forms C font passage; Described radial direction through hole (7) is built with plunger (10), and the inner of this plunger (10) is set with flexible diaphragm case (11).

2. diaphragm type oil-free vacuum pump according to claim 1, is characterized in that: the quantity of the upper uniform radial hole (7) of described rotor (3) is arranged to the odd numbers such as 3,5,7.

3. diaphragm type oil-free vacuum pump according to claim 1, is characterized in that: the width of described cut water (6) equals the diameter of radial direction through hole (8).

4. diaphragm type oil-free vacuum pump according to claim 1, is characterized in that: the outer end of described plunger (10) contacts by the eccentric opening inwall of roller (12) with described stator (4).

5. diaphragm type oil-free vacuum pump according to claim 1, is characterized in that: described elastic diaphragm cover (11) is packed on rotor (3) by guide pin bushing (13).

6. diaphragm type oil-free vacuum pump according to claim 1, is characterized in that: the installation of described elastic diaphragm cover (12) is pre-stretching.

7. diaphragm type oil-free vacuum pump according to claim 1, is characterized in that: described cut water cover (5) is shaped with the chamber (15) that can fill shaft seal (14).

8. diaphragm type oil-free vacuum pump according to claim 1, is characterized in that: the multiple uniform radial direction through hole (7) on described rotor (3) is axially arranged to many rows along rotor (3), as two rows, three rows etc.