阅读说明：本技术 一种设有浮动套的齿轮式输油泵 (Gear type oil transfer pump with floating sleeve ) 是由 冯清华 冯树云 叶小婷 冯清云 于 2021-08-09 设计创作，主要内容包括：本发明公开了一种设有浮动套的齿轮式输油泵,其特征在于：包括泵体、前盖、后盖、主动齿轮、从动齿轮、轴承座及驱动齿轮；所述泵体上设有进油通道与出油通道,泵体上设有贯通的容置腔,主动齿轮及从动齿轮放置于容置腔中并相互啮合,且主动齿轮与从动齿轮两侧为吸油腔与卸油腔,进油通道的内口连通吸油腔,出油通道的内口连通卸油腔；所述容置腔内至少设有一个浮动套,浮动套放置于容置腔中,主动齿轮上的主动轴及从动齿轮上的从动轴转动连接于浮动套的两端。本发明可有效减小齿轮所受的不平衡径向力,从而有效防止齿轮轴变形,并减轻齿顶刮削泵体内圆的现象发生,提高齿轮泵的寿命。(The invention discloses a gear type oil transfer pump with a floating sleeve, which is characterized in that: the pump comprises a pump body, a front cover, a rear cover, a driving gear, a driven gear, a bearing seat and a driving gear; the oil pump is characterized in that an oil inlet channel and an oil outlet channel are arranged on the pump body, a through accommodating cavity is arranged on the pump body, the driving gear and the driven gear are placed in the accommodating cavity and are meshed with each other, an oil suction cavity and an oil discharge cavity are arranged on two sides of the driving gear and the driven gear, an inner opening of the oil inlet channel is communicated with the oil suction cavity, and an inner opening of the oil outlet channel is communicated with the oil discharge cavity; the containing cavity is at least internally provided with a floating sleeve, the floating sleeve is placed in the containing cavity, and a driving shaft on the driving gear and a driven shaft on the driven gear are rotatably connected to two ends of the floating sleeve. The invention can effectively reduce the unbalanced radial force borne by the gear, thereby effectively preventing the gear shaft from deforming, reducing the phenomenon that the gear addendum scrapes the inner circle of the pump body and prolonging the service life of the gear pump.)

1. A gear type oil transfer pump with a floating sleeve is characterized in that: comprises a pump body (1), a front cover (2), a rear cover (3), a driving gear (4), a driven gear (5), a bearing seat (6) and a driving gear (7); an oil inlet channel (101) and an oil outlet channel (102) are arranged on the pump body (1), a through accommodating cavity (103) is arranged on the pump body (1), the driving gear (4) and the driven gear (5) are placed in the accommodating cavity (103) and are mutually meshed, an oil suction cavity (104) and an oil discharge cavity (105) are arranged on two sides of the driving gear (4) and the driven gear (5), an inner opening of the oil inlet channel (101) is communicated with the oil suction cavity (104), and an inner opening of the oil outlet channel (102) is communicated with the oil discharge cavity (105); the front cover (2) and the rear cover (3) are hermetically connected to two ends of an accommodating cavity (103) on the pump body (1), a bearing seat (6) is connected to the front cover (2), a rotating shaft (8) is rotatably connected into the bearing seat (6), a driving gear (7) is connected to the rotating shaft (8), and the other end of the rotating shaft (8) is connected to a driving shaft (401) on the driving gear (4); the accommodating cavity (103) is internally provided with at least one floating sleeve (9), the floating sleeve (9) is placed in the accommodating cavity (103), and a driving shaft (401) on the driving gear (4) and a driven shaft (501) on the driven gear (5) are rotatably connected to two ends of the floating sleeve (9).

2. The gear type oil transfer pump provided with the floating sleeve as claimed in claim 1, wherein: the long screw is sequentially connected with the rear cover (3), the pump body (1) and the front cover (2), and the pump body (1) is provided with a first oil duct (106), a second oil duct (107) and a third oil duct (108); the inner side ends of the first oil duct (106) and the second oil duct (107) are communicated with the oil inlet channel (101), the outer side end of the first oil duct (106) is connected with a one-way valve (10), and the outer side end of the second oil duct (107) is connected with a pressure limiting valve (11); the inner side end of the third oil duct (108) is communicated with the oil outlet channel (102), the outer side end of the third oil duct (108) is sealed by a sealing piece, and the third oil duct (108) is communicated with the first oil duct (106) and the second oil duct (107).

3. The gear type oil transfer pump provided with the floating sleeve as claimed in claim 2, wherein: two end faces of the pump body (1) are provided with sealing grooves A (109), and sealing gaskets A are arranged in the sealing grooves; the floating sleeve (9) is divided into two parts which are arranged in the front and the back, the inner wall of the accommodating cavity (103) is of an 8-shaped structure, the outline of the floating sleeve (9) is matched with the inner wall of the accommodating cavity (103), two shaft holes (901) are formed in the floating sleeve (9), and the driving shaft (401) and the driven shaft (501) are rotatably connected to the two shaft holes (901).

4. A gear type oil transfer pump provided with a floating sleeve as claimed in claim 3, wherein: the two floating sleeves (9) are symmetrically arranged, and the driving gear (4) and the driven gear (5) are positioned between the two floating sleeves (9); the outer end face of the floating sleeve (9) is provided with a W-shaped sealing groove B (902), and a sealing gasket B is arranged in the sealing groove B (902).

5. The gear type oil transfer pump provided with the floating sleeve as claimed in claim 4, wherein: a group of oil drainage grooves a (903) are formed in the outer end face of the floating sleeve (9), one ends of the oil drainage grooves a (903) are respectively communicated with the two shaft holes (901), and the other ends of the oil drainage grooves a (903) are communicated with the outer side face of the floating sleeve (9).

6. The gear type oil transfer pump provided with the floating sleeve as claimed in claim 4, wherein: a group of oil drainage grooves b (904) are formed in the inner end face of the floating sleeve (9), one ends of the oil drainage grooves b (904) are respectively communicated with the two shaft holes (901), and the other ends of the oil drainage grooves b (904) are communicated with the outer side face of the floating sleeve (9).

7. The gear type oil transfer pump provided with the floating sleeve as claimed in claim 1, wherein: one end of the rotating shaft (8) is connected to the driving shaft (401) through a concave-convex interlocking mechanism, a framework oil seal is connected between the rotating shaft (8) and the front cover (2), and the driving gear (7) is connected to the end of the rotating shaft (8) through a lock nut (12).

8. The gear type oil transfer pump provided with the floating sleeve as claimed in claim 1, wherein: the bearing seat (6) is connected to the front cover (2) through a bolt, two ball bearings (601) are arranged in the bearing seat (6) in an interference fit mode, a blocking ring (801) is arranged at the end portion of the rotating shaft (8), and the blocking ring (801) abuts against the end face of the rotating shaft (8) at the inner side end.

9. The gear type oil transfer pump provided with the floating sleeve as claimed in claim 4, wherein: the outer end face of the floating sleeve (9) is flush with the front end face and the rear end face of the pump body (1).

10. The gear type oil transfer pump provided with the floating sleeve as claimed in claim 9, wherein: two ends of the sealing groove B (902) are in an open structure.

Technical Field

The invention relates to the technical field of gear pumps, in particular to a gear type oil transfer pump with a floating sleeve.

Background

A gear type oil transfer pump is a device for converting mechanical energy into hydraulic energy, and is a rotary pump for transferring or pressurizing liquid by means of the change and movement of a working volume formed between a pump cylinder and a meshing gear. When the gear rotates, the space volume of the gear on the disengaging side is increased from small to large, vacuum is formed, and liquid is sucked; the space volume of the gear meshing side is reduced from large, and liquid is squeezed into the oil outlet. The gear pump has the characteristics of simple structure, low manufacturing cost, reliable work and capability of realizing high rotating speed and high pressure, is an important component of a hydraulic system, and is widely applied to the automobile industry.

The oil pressure of the oil suction cavity of the gear type oil delivery pump is very low, and the oil pressure of the oil discharge cavity is very high, so that the pressures at two ends of the gear are unequal, and the gear shaft is subjected to unbalanced hydraulic pressure. The gear shaft atress is uneven, not only directly influences the life-span of bearing, can make the gear shaft warp moreover, leads to the tooth top to scrape the pump body interior circle, and along with the improvement of gear pump pressure, its harm is big more moreover.

Disclosure of Invention

The invention aims to provide a gear type oil transfer pump with a floating sleeve, which effectively reduces unbalanced radial force borne by a gear, thereby effectively preventing a gear shaft from deforming, reducing the phenomenon that an inner circle of a pump body is scraped by a tooth top, prolonging the service life of the gear pump and solving the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a gear type oil transfer pump with a floating sleeve comprises a pump body, a front cover, a rear cover, a driving gear, a driven gear, a bearing seat and a driving gear; the oil pump is characterized in that an oil inlet channel and an oil outlet channel are arranged on the pump body, a through accommodating cavity is arranged on the pump body, the driving gear and the driven gear are placed in the accommodating cavity and are meshed with each other, an oil suction cavity and an oil discharge cavity are arranged on two sides of the driving gear and the driven gear, an inner opening of the oil inlet channel is communicated with the oil suction cavity, and an inner opening of the oil outlet channel is communicated with the oil discharge cavity; the front cover and the rear cover are hermetically connected to two ends of the accommodating cavity on the pump body, the bearing seat is connected to the front cover, the rotating shaft is rotatably connected into the bearing seat, the driving gear is connected to the rotating shaft, and the other end of the rotating shaft is connected to a driving shaft on the driving gear; the containing cavity is at least internally provided with a floating sleeve, the floating sleeve is placed in the containing cavity, and a driving shaft on the driving gear and a driven shaft on the driven gear are rotatably connected to two ends of the floating sleeve.

The invention has the further improvement scheme that the long screws are sequentially connected with the rear cover, the pump body and the front cover, and the pump body is provided with a first oil duct, a second oil duct and a third oil duct; the inner side ends of the first oil duct and the second oil duct are communicated with the oil inlet channel, the outer side end of the first oil duct is connected with a one-way valve, and the outer side end of the second oil duct is connected with a pressure limiting valve; the inner side end of the third oil duct is communicated with the oil outlet channel, the outer side end of the third oil duct is plugged through a sealing piece, and the third oil duct is communicated with the first oil duct and the second oil duct.

The invention has the further improvement scheme that two end faces of the pump body are provided with sealing grooves A, and sealing gaskets A are arranged in the sealing grooves; the floating sleeve is two in front and back arrangement, the inner wall of the containing cavity is of an 8-shaped structure, the outline of the floating sleeve is matched with the inner wall of the containing cavity, two shaft holes are formed in the floating sleeve, and the driving shaft and the driven shaft are rotatably connected to the two shaft holes.

The invention has the further improvement scheme that the two floating sleeves are symmetrically arranged, and the driving gear and the driven gear are positioned between the two floating sleeves; the outer end face of the floating sleeve is provided with a W-shaped sealing groove B, and a sealing gasket B is arranged in the sealing groove B.

The invention has the further improvement scheme that a group of oil drainage grooves a are arranged on the outer end surface of the floating sleeve, one ends of the oil drainage grooves a are respectively communicated with the two shaft holes, and the other ends of the oil drainage grooves a are communicated with the outer side surface of the floating sleeve.

The invention has the further improvement scheme that a group of oil drainage grooves b are arranged on the inner end surface of the floating sleeve, one ends of the oil drainage grooves b are respectively communicated with the two shaft holes, and the other ends of the oil drainage grooves b are communicated with the outer side surface of the floating sleeve.

The invention has the further improvement scheme that one end of the rotating shaft is connected to the driving shaft through a concave-convex interlocking mechanism, a framework oil seal is connected between the rotating shaft and the front cover, and the driving gear is connected to the end part of the rotating shaft through a lock nut.

The invention has the further improvement scheme that the bearing seat is connected to the front cover through a bolt, two ball bearings are arranged in the bearing seat in an interference fit mode, a stop ring is arranged at the end part of the rotating shaft, and the stop ring abuts against the end face of the rotating shaft at the inner side end.

The invention has the further improvement scheme that the outer end surface of the floating sleeve is flush with the front end surface and the rear end surface of the pump body.

In a further improvement of the present invention, two ends of the sealing groove B are open structures.

The invention has the beneficial effects that:

first, the gear type oil transfer pump with the floating sleeve of the present invention effectively reduces the unbalanced radial force applied to the gear, thereby effectively preventing the gear shaft from deforming, reducing the phenomenon that the gear tooth crest scrapes the inner circle of the pump body, and improving the service life of the gear pump.

In the gear type oil transfer pump with the floating sleeve, the outer end face of the floating sleeve is provided with the group of oil drainage grooves a, the inner end face of the floating sleeve is provided with the group of oil drainage grooves b, and the oil way opening is communicated with the oil discharge cavity and greatly offsets the pressure of the oil discharge cavity, so that unbalanced radial force borne by a gear is effectively reduced.

And the oil drainage groove a and the oil drainage groove b enable the closed high-pressure oil between the driving gear and the driven gear to be communicated with the oil suction cavity or the oil discharge cavity, so that the problem of oil trapping is solved, and the noise of the gear pump in use is reduced.

And fourthly, the gear type oil transfer pump with the floating sleeve is characterized in that the outer side end of the first channel is connected with a one-way valve, so that oil is prevented from flowing back, and the gear pump is effectively protected.

Fifth, the pressure limiting valve of the gear type oil transfer pump with the floating sleeve can accurately control oil pressure to prevent overload, and the service life of the gear pump is prolonged.

According to the gear type oil transfer pump with the floating sleeve, the two ends of the sealing groove B are of the open structures, so that the sealing gasket B is guaranteed to have allowance when thermally expanded and thermally contracted in the sealing groove B, and the sealing stability of the sealing gasket B is guaranteed.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the overall structure of the present invention.

Fig. 3 is a rear view of the present invention.

Fig. 4 is a cross-sectional view taken at a-a in fig. 3.

Fig. 5 is a schematic view of the installation of the floating sleeve of the present invention.

Fig. 6 is a schematic view of the accommodating chamber of the present invention.

Fig. 7 is a schematic diagram of the pump body structure of the present invention.

FIG. 8 is a side view of the pump body of the present invention.

Fig. 9 is a cross-sectional view taken at a-a in fig. 7.

Fig. 10 is a cross-sectional view at C-C in fig. 7.

Fig. 11 is a cross-sectional view taken at D-D in fig. 7.

Fig. 12 is a schematic view of the floating sleeve structure of the present invention.

Fig. 13 is a schematic view of the floating sleeve structure of the present invention.

In the figure: 1-pump body, 101-oil inlet channel, 102-oil outlet channel, 103-containing cavity, 104-oil suction cavity, 105-oil discharge cavity, 106-first oil channel, 107-second oil channel, 108-third oil channel, 109-sealing groove A, 2-front cover, 3-rear cover, 4-driving gear, 401-driving shaft, 5-driven gear, 501-driven shaft, 6-bearing seat, 601-ball bearing, 7-driving gear, 8-rotating shaft, 801-baffle ring, 9-floating sleeve, 901-shaft hole, 902-sealing groove B, 903-oil drainage groove a, 904-oil drainage groove B, 10-one-way valve, 11-pressure limiting valve and 12-locking nut.

Detailed Description

The invention is further elucidated with reference to the drawings and the embodiments.

Example 1: as shown in fig. 1 to 13, a gear type oil transfer pump with a floating sleeve comprises a pump body 1, a front cover 2, a rear cover 3, a driving gear 4, a driven gear 5, a bearing seat 6 and a driving gear 7; an oil inlet channel 101 and an oil outlet channel 102 are arranged on the pump body 1, a through accommodating cavity 103 is arranged on the pump body 1, the driving gear 4 and the driven gear 5 are placed in the accommodating cavity 103 and are mutually meshed, an oil suction cavity 104 and an oil discharge cavity 105 are arranged on two sides of the driving gear 4 and the driven gear 5, an inner opening of the oil inlet channel 101 is communicated with the oil suction cavity 104, and an inner opening of the oil outlet channel 102 is communicated with the oil discharge cavity 105; the front cover 2 and the rear cover 3 are hermetically connected to two ends of the accommodating cavity 103 on the pump body 1, the bearing seat 6 is connected to the front cover 2, the rotating shaft 8 is rotatably connected in the bearing seat 6, the driving gear 7 is connected to the rotating shaft 8, and the other end of the rotating shaft 8 is connected to a driving shaft 401 on the driving gear 4; at least one floating sleeve 9 is arranged in the accommodating cavity 103, the floating sleeve 9 is placed in the accommodating cavity 103, and a driving shaft 401 on the driving gear 4 and a driven shaft 501 on the driven gear 5 are rotatably connected to two ends of the floating sleeve 9; the long screws are sequentially connected to the rear cover 3, the pump body 1 and the front cover 2, and the pump body 1 is provided with a first oil duct 106, a second oil duct 107 and a third oil duct 108; the inner side ends of the first oil duct 106 and the second oil duct 107 are communicated with the oil inlet channel 101, the outer side end of the first oil duct 106 is connected with the one-way valve 10, and the outer side end of the second oil duct 107 is connected with the pressure limiting valve 11; the inner side end of the third oil channel 108 is communicated with the oil outlet channel 102, the outer side end of the third oil channel 108 is sealed by a sealing element, and the third oil channel 108 is communicated with the first oil channel 106 and the second oil channel 107; two end faces of the pump body 1 are provided with sealing grooves A109, and sealing gaskets A are arranged in the sealing grooves; the floating sleeve 9 is arranged in a front-back manner, the inner wall of the accommodating cavity 103 is in an 8-shaped structure, the outline of the floating sleeve 9 is matched with the inner wall of the accommodating cavity 103, two shaft holes 901 are formed in the floating sleeve 9, and the driving shaft 401 and the driven shaft 501 are rotatably connected to the two shaft holes 901; the two floating sleeves 9 are symmetrically arranged, and the driving gear 4 and the driven gear 5 are positioned between the two floating sleeves 9; the outer end face of the floating sleeve 9 is provided with a W-shaped sealing groove B902, and a sealing gasket B is arranged in the sealing groove B902; a group of oil drainage grooves a903 are formed in the outer end face of the floating sleeve 9, one ends of the oil drainage grooves a903 are respectively communicated with the two shaft holes 901, and the other ends of the oil drainage grooves a903 are communicated with the outer side face of the floating sleeve 9; a group of oil drainage grooves b904 are formed in the inner end face of the floating sleeve 9, one ends of the oil drainage grooves b904 are respectively communicated with the two shaft holes 901, and the other ends of the oil drainage grooves b904 are communicated with the outer side face of the floating sleeve 9; one end of the rotating shaft 8 is connected to the driving shaft 401 through a concave-convex interlocking mechanism, a framework oil seal is connected between the rotating shaft 8 and the front cover 2, and the driving gear 7 is connected to the end of the rotating shaft 8 through a lock nut 12; the bearing seat 6 is connected to the front cover 2 through a bolt, two ball bearings 601 are arranged in the bearing seat 6 in an interference fit mode, a baffle ring 801 is arranged at the end part of the rotating shaft 8, and the baffle ring 801 abuts against the end face of the rotating shaft 8 at the inner side end; the outer end surface of the floating sleeve 9 is flush with the front end surface and the rear end surface of the pump body 1; two ends of the sealing groove B902 are in an open structure.

In conclusion, the floating sleeve 9 in the pump body 1 can effectively reduce the unbalanced radial force borne by the gear, thereby effectively preventing the gear shaft from deforming, reducing the phenomenon that the gear addendum scrapes the inner circle of the pump body 1 and prolonging the service life of the gear pump; a group of oil drainage grooves a903 are formed in the outer end face of the floating sleeve 9, a group of oil drainage grooves b904 are formed in the inner end face of the floating sleeve 9, an oil way opening is communicated with the oil discharge cavity 105, pressure of the oil discharge cavity is greatly offset, and therefore unbalanced radial force borne by the gear is effectively reduced; the oil drainage groove a903 and the oil drainage groove b904 enable the closed high-pressure oil between the driving gear 4 and the driven gear 5 to be communicated with the oil suction cavity 104 or the oil discharge cavity 105, so that the problem of oil trapping is solved, and the noise of the gear pump in use is reduced; the outer side end of the first channel is connected with a one-way valve 10, so that oil backflow is prevented, and the gear pump is effectively protected; the pressure limiting valve 11 can accurately control oil pressure to prevent overload, and the service life of the gear pump is prolonged; the two ends of the sealing groove B902 are of open structures, so that the sealing gasket B is ensured to have allowance in thermal expansion and cold contraction in the sealing groove B902, and the sealing stability is ensured.

The above embodiments are merely illustrative of the technical concepts and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.