CN200940570Y

CN200940570Y - Vacuum pump

Info

Publication number: CN200940570Y
Application number: CN 200620075586
Authority: CN
Inventors: 王宏俊
Original assignee: ZHEJIANG YONGTAI VEHICLE FITTINGS MANUFACTURING Co Ltd
Current assignee: ZHEJIANG YONGTAI VEHICLE FITTINGS MANUFACTURING Co Ltd
Priority date: 2006-08-09
Filing date: 2006-08-09
Publication date: 2007-08-29
Anticipated expiration: 2016-08-09

Abstract

The utility model discloses a blade type vacuum pump for automobile comprising a rotor and a blade which are both arranged in the pump body. The output shaft of the motor, the medial axis of the pump chamber and the medial axis of the cover mounting hole are co-rotating eccentricity, the blade groove on the rotor is a non-radial groove which can not intersect the axial lead of the rotor after the extension. On the intracavity wall of the pump body an arc groove is arranged between the oil and gas compression area and the oil and gas excretion area. By changing the structure of the blade groove, when the blade rotates to the B point, the strength of the blade is relatively increased because in the rotor groove the supporting surface of the blade is increased, which overcomes the deficiencies of easily broken of blade, at the same time the local structure of the pump chamber has been changed, an arc groove is added into the pump chamber, the mixed oil and gas in the compression area of pump chamber can be released early from the chamber, thereby the load of the blade and the pump power consumption are reduced. .

Description

Vacuum pump

Technical field

The utility model relates to the automotive blade-type vacuum pump.

Background technique

The patent No. 03220232.6, patent applicant Wang Hong person of outstanding talent, the applying date is 2003.3.6, patent name is the automobile vacuum pump, notification number CN2602192Y, this patent disclosure a kind of automobile vacuum pump, under the prerequisite that does not change pump case and end cap installation dimension, offset distance between pump case lumen centers and the rotor center is strengthened on the direction of former offset distance in the same way, thereby strengthened the vacuum pump delivery, the shortcoming of this patent is: when strengthening air containment and pressure, cause blade to fracture easily when rotated, shorten the working life of blade greatly.Be as shown in Figure 1 the blade 5 of this patent in the pump housing 3 with the mounting structure figure of rotor 4, as can be seen from FIG., blade 5 relative rotors 4 are radially installed, this structure makes the position of the length of blade 5 row pressure air and supporting surface depend on the length of rotor 4 grooves fully, when blade 5 rotates to the B point position of close oil gas compressing area, the supporting surface of blade in rotor is too short, and this is the reason that causes blade broken.

Summary of the invention

The utility model is the deficiency that overcomes above-mentioned technology, provides a kind of long service life and effect big vacuum pump.

The technical solution adopted in the utility model is: be included in rotor and the blade installed in the pump housing, the axis three of the axis of the output shaft of motor, pump housing inner chamber and end cap mounting hole is eccentric in the same way, epitrochanterian blade groove is non-radial groove, it is non-intersect with the shaft axis of rotor that it extends the back, and a curve bath is being set between oil gas compressing area and oil gas discharge zone on the internal chamber wall of the pump housing.

The utility model is by changing the blade groove structure, when blade rotates to B point position, because blade supporting surface in rotor increases, the intensity of blade increases relatively, overcome the defective of blade frangibility, changed the partial structurtes in the pump chamber simultaneously, in pump chamber, increased by one section arc groove, oil, gas mixture can be released outside the discharge side ahead of time in the pump chamber compressing area, thereby reduce the load of blade and the consumed power of pump.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Fig. 1 is the background technique structural representation;

Fig. 2 is a main sectional view of the present utility model;

Fig. 3 is the A-A sectional structure chart among Fig. 2;

Fig. 4 is a kind of structure of Fig. 3 rotor 4;

Fig. 5 is the another kind of structure of Fig. 3 rotor 4.

Embodiment

Shown in Fig. 1～3, rotor 4 is connected with the output shaft of motor 1 is coaxial, the outer side of the pump housing 3 has three uniform mounting holes 6, the pump housing 3 is fixed on the end cap of motor 1 one sides, the axis of the output shaft of motor 1, the pump housing 3 inner chambers and the axis three of end cap mounting hole 6 are eccentric in the same way, and rotor 4 and blade 5 are installed in the pump housing 3.Blade groove 2 on the rotor 4 is arranged to non-radial groove, and it is non-intersect with the shaft axis of rotor 4 that it extends the back.The internal chamber wall rotation of the pump housing 3 is close at the two ends of blade 5, because eccentric the installation, its length that is arranged in the pump housing 3 inner chambers is in variation, and during near blade 5 rotates to oil gas compressing area C B position, its supporting surface that is positioned at 2 li of blade grooves is the shortest.

As shown in Figure 4, can be arranged to three blade grooves 2 on the rotor 4, these three blade grooves 2 are an end opening square groove of tiltedly stretching mutually on rotor 4 circular transversal, and uniform arrangement.As shown in Figure 5, the blade groove 2 on the rotor 4 also can be arranged to four one end opening square grooves, uniform arrangement, and two square grooves of relative angle are parallel to each other.

Intakeport 8 is communicated with the pump housing 3 respectively with air outlet 7 in both sides, at oil gas compressing area C with near 100～155 ° of positions between the oil gas discharge zone D of air outlet 7 curve bath 10 is being set on the internal chamber wall of the pump housing 3, curve bath 10 is wide to be 7～16mm, is 1～1.5mm deeply.

Claims

1. vacuum pump, be included in rotor (4) and blade (5) are installed in the pump housing (3), the axis of the output shaft of motor (1), the pump housing (3) inner chamber and the axis three of end cap mounting hole (6) are eccentric in the same way, it is characterized in that: the blade groove (2) on the rotor (4) is non-radial groove, it is non-intersect with shaft axis of rotor (4) that it extends the back, a curve bath (10) is set being positioned on the internal chamber wall of the pump housing (3) between oil gas compressing area (C) and the oil gas discharge zone (D).

2. vacuum pump according to claim 1 is characterized in that: described blade groove (2) is three square grooves of tiltedly stretching mutually.

3. vacuum pump according to claim 1 is characterized in that: described blade groove (2) is four square grooves that the diagonal angle is parallel to each other in twos.

4. vacuum pump according to claim 1 is characterized in that: the wide 7～16mm of being of described curve bath (10) is 1～1.5mm deeply.

5. vacuum pump according to claim 1 is characterized in that: described curve bath (10) is positioned between oil gas compressing area (C) and oil gas discharge zone (D) 100～155 °.