CN209782194U - Rotor pump structure of integrated water pump - Google Patents

Abstract

a rotor pump structure of an integrated water pump comprises a rotor pump and a water pump, wherein the rotor pump comprises a pump body, a pump cover, an inner rotor, an outer rotor and an adjusting valve, a low-pressure cavity, a high-pressure cavity, an oil inlet cavity and a valve hole are formed in the pump body, an annular step for mounting a crankshaft oil seal is further formed in the pump body, a water inlet, a water outlet and an oil outlet are formed in the water pump, the adjusting valve comprises a spring, a plunger and a plug, the plunger is integrally in a high-foot cup shape and comprises a cylindrical part, a rod-shaped part and a disc part, one end of the spring is mounted in the cylindrical part, a transfer chamber is formed between the rod-shaped part and the hole wall of the valve hole, a bulge is arranged on the outer side of the disc part; the pump body is further provided with an oil guiding hole and a feedback oil hole, the oil guiding hole is arranged on one side of the low-pressure cavity and the high-pressure cavity, the feedback oil hole is close to the low-pressure cavity, one end of the feedback oil hole is communicated with the oil guiding hole, and the other end of the feedback oil hole is communicated with the feedback oil cavity.

Description

Rotor pump structure of integrated water pump

Technical Field

The utility model relates to an internal-combustion engine lubricating system especially indicates a rotor pump structure of integrated water pump.

background

At present, in most automobile engine cylinder blocks, a water pump and a rotor pump are separately installed, but because the space of some engine cylinder blocks is limited, the water pump can be integrally installed on one side of the rotor pump, as shown in fig. 1, a water inlet 8 and a water outlet 9 are formed in a water pump B, an oil outlet 10 is also formed in the water pump B, engine oil in the rotor pump A is sent into a lubricating pipeline through the oil outlet 10 in the water pump B, and therefore the occupied space of the pump can be effectively saved.

As shown in fig. 1, a rotor pump a of a conventional structure mainly includes a pump body 1, a pump cover 2, an inner rotor 3, an outer rotor 4 and a regulating valve 5, wherein a rotor cavity is formed in the middle of the pump body 1, the inner rotor 3 and the outer rotor 4 are engaged with each other and mounted in the rotor cavity, a low pressure cavity 1a, a high pressure cavity 1B, an oil inlet cavity 1c and a valve hole 1d for mounting the regulating valve 5 are formed in a mounting surface of the pump body 1 (i.e., the other surface of the pump body 1 opposite to the outer surface thereof), the oil inlet cavity 1c is communicated with the low pressure cavity 1a, an oil outlet 10 of the water pump B is communicated with the high pressure cavity 1B, the valve hole 1d is respectively communicated with the low pressure cavity 1a and the high pressure cavity 1B, the pump cover 2 is mounted on the mounting surface of the pump body 1, a crankshaft 6 for driving the inner rotor 3 to rotate vertically penetrates through the pump cover 2, normally, in order to mount the crankshaft oil seal 7 well, an annular step 1e surrounding the shaft hole of the pump body 1 is formed on the outer side surface of the pump body 1, and the crankshaft oil seal 7 is mounted in the annular step 1 e.

As is known, the rotor pump can provide enough pressure and flow of engine oil for the lubricating system, when the oil pressure of the main oil gallery of the lubricating system is too high, the pressure oil of the feedback oil passage can enter the feedback oil cavity of the valve hole of the rotor pump to promote the regulating valve to move, and the oil in the high-pressure cavity is reduced to be discharged from the oil outlet, so that the oil pressure in the main oil gallery is reduced, otherwise, the regulating valve moves in the opposite direction, the oil discharged from the oil outlet is increased, and the oil pressure in the main oil gallery is increased. However, in the above-mentioned conventional rotor pump, since the feedback oil path of the main oil path is disposed at a side close to the high-pressure chamber of the rotor, and the feedback oil hole for receiving the pressure oil of the feedback oil path is also disposed at a side close to the high-pressure chamber, this design seems to simplify the structure, and in fact, during the oil discharge of the high-pressure chamber of the rotor, a small amount of high-pressure oil enters the feedback oil chamber through the gap between the pump body valve hole and the plunger of the regulating valve, so that the feedback oil chamber receives two pressure oils from the high-pressure chamber and the main oil path, and in comparison, the pressure oil in the high-pressure chamber fluctuates more than the pressure oil in the main oil path, and the pressure oil in the high-pressure chamber reaches the feedback oil chamber earlier, so that when the oil pressure in the high-pressure chamber is slightly higher, it is likely to interfere with the regulating oil pressure of the regulating valve, so that the regulating valve is opened earlier or improperly, and the oil, Inaccurate adjustment.

Above-mentioned traditional gerotor pump still has a more apparent problem, the bent axle oil blanket on the pump body still has the certain distance apart from the terminal surface of inner rotor, can store not few fluid between these two, when the high-speed operation of rotor, these fluid can produce great pressure to the bent axle oil blanket, in addition, also can store some residual fluid and impurity between bent axle oil blanket and the annular step, especially the corner position of annular step, these fluid and impurity also can not be fine discharge, this will corrode the bent axle oil blanket, reduce the life of bent axle oil blanket.

SUMMERY OF THE UTILITY MODEL

The utility model provides a rotor pump structure of integrated water pump, the high-pressure oil interference governing valve of solution rotor pump high-pressure intracavity that can be fine adjusts the problem of oil pressure.

in order to solve the technical problem, the utility model discloses a following technical scheme: a rotor pump structure of an integrated water pump comprises a rotor pump and a water pump fixed on one side of the rotor pump; the rotor pump comprises a pump body, a pump cover, an inner rotor, an outer rotor and an adjusting valve, wherein a low-pressure cavity, a high-pressure cavity, an oil inlet cavity and a valve hole for mounting the adjusting valve are formed in the mounting surface of the pump body, and an annular step for mounting a crankshaft oil seal is formed in the outer side surface of the pump body in a manner of surrounding a shaft hole of the pump body; the water pump is provided with a water inlet, a water outlet and an oil outlet; the oil inlet cavity is communicated with the low pressure cavity, the oil outlet is communicated with the high pressure cavity, and the valve hole is respectively communicated with the low pressure cavity and the high pressure cavity;

The regulating valve comprises a spring, a plunger and a plug which are sequentially arranged in a valve hole from inside to outside, the plunger is integrally in a high-foot cup shape and comprises a cylindrical part at the inner side end, a rod-shaped part in the middle and a disc part at the outer side end, one end of the spring is arranged in the cylindrical part, a transfer chamber is formed between the rod-shaped part and the hole wall of the valve hole, a bulge capable of abutting against the plug is arranged on the outer side of the disc part, a feedback oil cavity is formed between the disc part and the plug, and the cylindrical part can plug or open an opening of a high-pressure cavity to the valve hole;

The oil pump is characterized in that the pump body is further provided with an oil guiding hole and a feedback oil hole, the oil guiding hole is transversely arranged on the same side of the low-pressure cavity and the high-pressure cavity, the feedback oil hole is also positioned close to the low-pressure cavity, one end of the feedback oil hole is communicated with the oil guiding hole, and the other end of the feedback oil hole is vertically communicated with the feedback oil cavity.

Furthermore, the feedback oil hole is communicated with the oil guiding hole through a circular hole, the feedback oil hole is communicated with the feedback oil cavity through a stepped hole, and the caliber of the stepped hole is gradually reduced from the feedback oil hole to the feedback oil cavity.

further, the low pressure chamber includes first low pressure chamber and second low pressure chamber, the high pressure chamber with first low pressure chamber symmetry centers on outside the shaft hole of the pump body, the second low pressure chamber centers on outside the high pressure chamber, the one end intercommunication oil feed chamber in first low pressure chamber, the other end in first low pressure chamber and the one end intercommunication in second low pressure chamber, the other end in second low pressure chamber and the middle part intercommunication of valve opening, the middle part in high pressure chamber and the middle part intercommunication of valve opening.

Furthermore, the joints of the rod-shaped part, the cylindrical part and the disc part are all in a bevel structure; the bottom of valve opening installs the spring holder, the one end of spring is installed in the spring holder.

Furthermore, a frame is arranged on the edge of the mounting surface of the pump body, a notch is formed in the frame positioned at the lower part of the pump body, after the pump cover is mounted on the mounting surface of the pump body, the surface of the pump cover is lower than the frame of the pump body, a plurality of oil discharge grooves with the length equal to that of a shaft hole of the inner rotor are axially formed in the shaft hole of the inner rotor, and oil between the crankshaft oil seal and the end surface of the inner rotor can be discharged out of the pump cover through the oil discharge grooves and then flows into the oil pan through the notch;

the oil pump is characterized in that an inclined oil hole is further formed in the pump body, an inlet of the inclined oil hole is formed in the annular step, an outlet of the inclined oil hole is formed in the bottom of the pump body, and oil between the crankshaft oil seal and the annular step can be discharged into the oil pan through the inclined oil hole.

Still further, still set up a plurality of keyways with each spline one-to-one cooperation of bent axle on the shaft hole of inner rotor, the quantity of oil extraction groove and keyway is 6 respectively, and these 6 oil extraction grooves and 6 key grooves distribute mutually.

furthermore, the oil discharge groove is a semicircular or square notched groove, the depth of the oil discharge groove is equal to that of the key groove, and the opening width of the oil discharge groove is 1/3 of the opening width of the key groove.

Furthermore, the oblique oil holes comprise a first oblique oil hole and a second oblique oil hole which are obliquely formed, an inlet of the first oblique oil hole is formed in a corner of the annular step, an outlet of the first oblique oil hole is communicated with an inlet of the second oblique oil hole, an outlet of the second oblique oil hole is formed in the bottom of the pump body, and the cross sections of the first oblique oil hole and the second oblique oil hole are elliptical.

Preferably, an oil inlet is formed in the position, opposite to the oil inlet cavity of the pump body, of the pump cover, a molded rubber sealing ring is arranged at the edge of the oil inlet, and the thickness of the rubber sealing ring is equal to the height difference between the frame of the pump body and the pump cover.

preferably, two strip-shaped oil grooves are symmetrically formed in the side face, facing the rotor cavity, of the pump cover by taking the shaft hole of the pump cover as a center, and the two oil grooves are opposite to the inner rotor and the outer rotor which are meshed with each other.

Compare with traditional impeller pump, the utility model relates to an improvement point of impeller pump structure of integrated water pump lies in:

Firstly, a drainage hole which can lead feedback oil close to a main oil duct feedback oil path at a high-pressure end to a low-pressure end is added, so that a feedback oil hole on a pump body can be arranged at the low-pressure end, oil in a low-pressure cavity basically cannot enter a feedback oil cavity during working, and only when the oil pressure of a main oil duct is too high, a regulating valve can be smoothly opened by the feedback oil in the feedback oil hole at the low-pressure end, so that the structure can effectively prevent the high-pressure oil in the high-pressure cavity from entering the feedback oil cavity to interfere the working of the regulating valve, the regulating valve only receives the feedback of the feedback oil of the main oil duct, the oil pressure can be timely and accurately regulated, and the stability of the oil;

Secondly, the structure of the regulating valve is simplified, the plunger is integrally in a high-foot cup shape and comprises a cylindrical part at the inner side end, a rod-shaped part in the middle and a disc part at the outer side end, a feedback oil cavity can be formed between the disc part and the plug, so that the situation that an oil hole and the feedback oil cavity are formed in the plug can be avoided, three parts of the plunger are all parts with regular shapes, the regulating valve is very easy to process and beneficial to batch production, and moreover, when the structure of the regulating valve is simplified, the effect of oil pressure feedback is also improved, pressure oil of a main oil duct enters the feedback oil cavity through the feedback oil hole, the contact surface with the disc part is very large, a plunger compression spring can be effectively pushed to open a port of the high-pressure cavity through a valve hole, and the effect of feedback.

The space of the low-pressure cavity is enlarged, the low-pressure cavity comprises a first low-pressure cavity and a second low-pressure cavity, after the regulating valve is opened, the internal oil drainage of the high-pressure cavity can be directly sent into the second low-pressure cavity, and then forms two oil strands with the oil in the oil inlet cavity to be supplied to the first low-pressure cavity;

The rotor pump is provided with a structure which is convenient for discharging some residual oil and impurities into the oil pan, the shaft hole of the inner rotor is provided with an oil discharge groove, the oil discharge groove can smoothly discharge the oil between the crankshaft oil seal and the end surface of the inner rotor to the outside of the pump cover, and then the oil is discharged into the oil pan through the gap of the pump body, so that the impact pressure of the oil at the position on the crankshaft oil seal is greatly reduced, and the adverse effect on the crankshaft oil seal is reduced; still seted up oblique oilhole on the impeller pump body, during the oilhole can be discharged the oil pan with the fluid between bent axle oil blanket and the annular step to one side, fluid on the annular step can obtain continuous renewal along with the operation of impeller pump, so can effectively avoid old fluid and impurity corrosion bent axle oil blanket, compares traditional impeller pump, the utility model provides an impeller pump can make the life of bent axle oil blanket longer.

drawings

fig. 1 is a schematic structural diagram of a conventional rotor pump of an integrated water pump (a pump cover is not shown);

FIG. 2 is a schematic view of a conventional rotor pump of an integrated water pump;

3 FIG. 3 3 3 is 3a 3 cross 3- 3 sectional 3 view 3 taken 3 along 3A 3- 3A 3 of 3 FIG. 3 2 3; 3

Fig. 4 is a schematic view of a rotor pump structure of the integrated water pump (a pump cover is not shown) according to the present invention;

Fig. 5 is a schematic view of a rotor pump structure of the integrated water pump according to the present invention (the pump cover, the crankshaft, the inner rotor, and the outer rotor are not shown);

FIG. 6 is an enlarged view of the portion C of FIG. 5;

Fig. 7 is an exploded view of the regulating valve according to the present invention;

Fig. 8 is a longitudinal sectional view of the regulating valve according to the present invention when closed;

fig. 9 is a longitudinal sectional view of the regulating valve according to the present invention when opened;

Fig. 10 is a schematic view of a rotor pump structure of an integrated water pump according to the present invention;

3 FIG. 3 11 3 is 3a 3 cross 3- 3 sectional 3 view 3 taken 3 along 3A 3- 3A 3 of 3 FIG. 3 10 3; 3

Fig. 12 is a schematic structural view of the inner rotor according to the present invention.

The reference signs are:

a-rotor pump B-water pump

1-Pump body 1 a-Low pressure Chamber 1a 1-first Low pressure Chamber

1a 2-second Low pressure Cavity 1 b-high pressure Cavity 1 c-oil intake Cavity

1 d-valve hole 1d 1-feedback oil cavity 1 e-annular step

1 f-oil guiding hole 1 g-feedback oil hole 1 h-notch

1 i-oblique oil hole 1i 1-first oblique oil hole 1i 2-second oblique oil hole

2-pump cover 2 a-oil inlet 3-inner rotor

3 a-oil discharge groove 3 b-key groove 4-external rotor

5-regulating valve 5 a-spring 5 b-plunger

5b1 cylindrical portion 5b2 rod-shaped portion 5b3 disk portion

5 c-plug 5 d-spring seat 6-crankshaft

7-crankshaft oil seal 8-water inlet 9-water outlet

10-oil outlet 11-circular hole 12-stepped hole.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or interconnected between two elements, directly or indirectly through intervening media, and the specific meaning of the terms may be understood by those skilled in the art according to their specific situation.

As shown in fig. 1, a conventional rotor pump structure of an integrated water pump, which is explained in the background art, in which a valve hole 1d is transversely provided above a low pressure chamber 1a and a high pressure chamber 1b, a feedback oil hole 1g connecting a main oil passage feedback oil passage is opened at the right side of the valve hole 1d and close to the high pressure chamber 5, a regulator valve 5 (using a conventional plunger type regulator valve including a spring 5a, a plunger 5b, and a plug 5 c) is installed in the valve hole 1d, the plunger 5b is located at a position blocking the opening of the low pressure chamber 1a to the valve hole 1d, the spring 5a is installed at the left side of the plunger 5b, a feedback oil chamber 1d1 in the valve hole 1d is located at the rightmost side of the plunger 5b, a small gap exists between the valve hole 1d and the plunger 5b, the small gap enables high pressure oil of the high pressure chamber 1b to enter into a feedback oil chamber 1d1 from the high pressure chamber 1b, once the high-pressure oil pressure exceeds the opening pressure of the regulating valve 5, the high-pressure oil can push the plunger 5b to move leftwards, the spring 5a is compressed, the opening of the low-pressure cavity 1a to the valve hole 1d is opened, otherwise, the high-pressure oil pressure is reduced to a certain value, the spring 5a recovers, the plunger 5b moves rightwards, and the opening of the low-pressure cavity 1a to the valve hole 1d is blocked again.

Aiming at the defects of a rotor pump of the traditional integrated water pump, the problem that high-pressure oil can open a regulating valve can be solved by actually changing the position of a feedback oil hole, the oil pressure of the oil in a low-pressure cavity is considered to be small, and the regulating valve can not be opened basically, therefore, the position of the feedback oil hole can be designed at the low-pressure end of a pump body, correspondingly, a channel is needed to be designed to introduce the feedback oil of a main oil duct feedback oil path into the feedback oil hole because the low-pressure end is far away from the main oil duct feedback oil path, furthermore, the position of a regulating valve hole feedback oil cavity is close to the low-pressure cavity, namely, the movement direction of the regulating valve needs to be changed, at present, the regulating valves used for regulating outlet oil pressure in an oil pump are more in types, a plunger type regulating valve is more typical, most of the traditional plunger regulating valves need to be, the structure is somewhat complex and not conducive to processing. In view of the above, the present embodiment improves the structure of the pump body and the regulating valve of the rotor pump, as follows.

As shown in fig. 4, a rotor pump structure of an integrated water pump includes a rotor pump a and a water pump B; the rotor pump A comprises a pump body 1, a pump cover 2, an inner rotor 3, an outer rotor 4 and a regulating valve 5, wherein a low-pressure cavity 1a, a high-pressure cavity 1b, an oil inlet cavity 1c and a valve hole 1d for mounting the regulating valve 5 are formed in the mounting surface of the pump body 1 (certainly, the pump body 1 is also provided with a shaft hole and a rotor cavity, and the structures are not improved like the traditional rotor pump, so that details are not shown here), and an annular step 1e for mounting a crankshaft oil seal 7 is formed in the outer side surface of the pump body 1 around the shaft hole of the pump body 1; the water pump B is arranged on one side of the rotor pump A close to the high-pressure cavity 1B, and is provided with a water inlet 8, a water outlet 9 and an oil outlet 10; the oil inlet cavity 1c is communicated with the low pressure cavity 1a, the oil outlet 10 is communicated with the high pressure cavity 1b, and the valve hole 1d is respectively communicated with the low pressure cavity 1a and the high pressure cavity 1 b;

The adjusting valve 5 comprises a spring 5a, a plunger 5b and a plug 5c which are sequentially arranged in the valve hole 1d from inside to outside, the plunger 5b is integrally in a high-foot cup shape and comprises a cylindrical part 5b1 at the inner end, a rod-shaped part 5b2 at the middle and a disc part 5b3 at the outer end, one end of the spring 5a is arranged in the cylindrical part 5b1, a transfer chamber is formed between the rod-shaped part 5b2 and the hole wall of the valve hole 1d, a bulge capable of abutting against the plug is arranged on the outer side of the disc part 5b3, a feedback oil cavity 1d1 is formed between the disc part 5b3 and the plug 5c, and the cylindrical part 5b1 can plug or open the opening of the high-pressure cavity 1b to the valve hole 1;

The pump body 1 is further provided with an oil guiding hole 1f and a feedback oil hole 1g, the oil guiding hole 1f is transversely arranged on the same side of the low-pressure cavity 1a and the high-pressure cavity 1b, the feedback oil hole 1g is also located at a position close to the low-pressure cavity 1a, one end of the feedback oil hole 1g is communicated with the oil guiding hole 1f, and the other end of the feedback oil hole 1g is vertically communicated with a feedback oil cavity 1d 1.

in the rotor pump structure of the above embodiment, as shown in fig. 4, the orifice of the valve hole 1d is opened at the left side of the pump body 1, the regulating valve 5 is installed in the valve hole 1d, the spring 5a is located at the bottom of the valve hole 1d, the plunger 5b is located in the middle of the valve hole 1d, and the plug 5c is located at the orifice of the valve hole 1d, obviously, the installation direction of the regulating valve 5 is just opposite to the direction of installing the regulating valve in the conventional rotor pump, although in this installation manner, a small gap also exists between the valve hole 1d and the disk portion 5b3, since the low pressure chamber 1a is a negative pressure, substantially no oil will enter into the feedback oil chamber 1d1 through this small gap, so that only the pressure oil from the feedback oil passage of the main oil gallery can open the regulating valve 5, specifically, as shown in fig. 4, 8 and 9, when the oil pressure of the main oil passage is too high, the pressure oil of the main oil passage enters into the feedback oil hole 1g first through the feedback oil passage 1d1, then acts on the end face of the disk portion 5b3, pushes the plunger 5b to move rightward against the spring force of the spring 5a until the cylindrical portion 5b1 moves away from the position where the high pressure chamber 1b opens to the valve hole 1d, so that the high pressure chamber 1b and the low pressure chamber 1a can be communicated with the transfer chamber between the rod-shaped part 5b2 and the hole wall of the valve hole 1d, at the moment, part of oil liquid in the high pressure chamber 1b can enter the low pressure chamber 1a, so that the oil discharged from the oil outlet 10 from the high pressure chamber 1b is reduced, the oil pressure in the main oil gallery is lowered, and conversely, when the oil pressure of the main oil gallery is too small, the spring 5a of the regulating valve 5 resets to push the cylinder part 5b1 to move leftwards, the opening of the high-pressure cavity 1b to the valve hole 1d is blocked again, therefore, the high pressure chamber 1b and the low pressure chamber 1a cannot communicate with each other, the oil discharged from the oil outlet 10 increases, and the oil pressure in the main gallery increases.

Obviously, the rotor pump in the embodiment can effectively prevent the high-pressure oil in the high-pressure cavity 1b from entering the feedback oil cavity 1d1 to interfere the operation of the regulating valve 5, so that the regulating valve 5 only receives the feedback of the feedback oil in the main oil gallery, the oil pressure can be timely and accurately regulated, and the stability of the oil pressure of the rotor pump is ensured. As can be seen from the above, the present embodiment improves the regulating valve 5 in the rotor pump a, the plunger 5b is in a high-foot cup shape as a whole, the plunger 5b includes the inner cylindrical portion 5b1, the middle rod-shaped portion 5b2, and the outer disk portion 5b3, all of the three components of the plunger 5b are regular parts, and are very easy to process and beneficial to mass production, and the connection manner between the three components is also simple, and can be realized by welding, screwing or other conventional connection manners, just as the plunger 5b is simply improved, the feedback oil chamber 1d1 can be formed between the disk portion 5b3 and the plug 5c, so as to avoid the oil hole and the feedback oil chamber on the plug 5 c. The structure of the regulating valve 5 in the present embodiment is significantly simplified as a whole. It should be emphasized that, while the structure of the regulating valve 5 is simplified, the effect of oil pressure feedback is also improved, and after the pressure oil in the main oil gallery enters the feedback oil chamber 1d1 through the feedback oil hole 1g, the contact surface of the pressure oil with the disc part 5b3 is very large, so that the plunger 5b can be effectively pushed to compress the spring 5a to open the port of the high pressure chamber 1b through the valve hole 1d, and the effect of oil pressure feedback regulation is achieved. In the rotor pump a of the present embodiment, it is important that, in a normal condition, when the oil pressure is adjusted, the adjusting valve 5 sends the redundant oil (hereinafter referred to as "internal oil drain") in the high-pressure chamber 1b into the oil pan, and in this structure, the internal oil drain in the high-pressure chamber 1b is directly sent into the low-pressure chamber 1a, which not only can play a role of adjusting the oil pressure, but also can simplify the oil path structure, and avoid the need of additionally designing a passage to send the internal oil drain to the oil pan, and at the same time, the internal oil drain in the high-pressure chamber 1b and the oil in the oil inlet chamber 1c form two oil streams to be supplied to the low-pressure chamber 1a, and the volume ratio of the low-pressure chamber 1a can be increased.

Further, as shown in fig. 6, the feedback oil hole 1g communicates with the oil guiding hole 1f through a circular hole 11, the feedback oil hole 1g communicates with the feedback oil chamber 1d1 through a stepped hole 12, the diameter of the stepped hole 12 gradually decreases from the feedback oil hole 1g to the feedback oil chamber 1d1, and the stepped hole 12 has a damping effect, so that the pressure fluctuation of the feedback oil in the feedback oil hole 1g can be effectively reduced, and the stability of the oil pressure can be further improved.

in order to ensure that the internal oil drainage in the high-pressure cavity 1b is smoothly fed into the low-pressure cavity 1a, the internal oil drainage in the high-pressure cavity 1b and the oil in the oil inlet cavity 1c form two oil streams to be supplied to the low-pressure cavity 1a, and further, the space of the low pressure chamber 1a can be enlarged appropriately (in the conventional rotor pump, the high pressure chamber and the low pressure chamber have substantially the same space size and symmetrically surround the shaft hole), as shown in fig. 5, the low pressure chamber 1a includes a first low pressure chamber 1a1 and a second low pressure chamber 1a2, the high pressure chamber 1b and the first low pressure chamber 1a1 symmetrically surround the shaft hole of the pump body 1, the second low pressure chamber 1a2 surrounds the high pressure chamber 1b, one end of the first low pressure chamber 1a1 communicates with the oil inlet chamber 1c, the other end of the first low pressure chamber 1a1 communicates with one end of the second low pressure chamber 1a2, the other end of the second low pressure chamber 1a2 communicates with the middle portion of the valve hole 1d, and the middle portion of the high pressure chamber 1b communicates with the middle portion of the valve hole 1 d. After the regulating valve 5 is opened, the internal drain oil of the high pressure chamber 1b reaches the second low pressure chamber 1a2 through the valve hole 1d, and then forms two oil flows with the oil in the oil inlet chamber 1c to be supplied to the first low pressure chamber 1a 1.

generally speaking, still can install the relief valve on the rotor pump A, the relief valve can be timely with unnecessary fluid discharge in the rotor pump A, can not influence the safety because of the oil pressure is too high when guaranteeing the rotor pump A to use and open, consequently, the relief valve opening has still been seted up on the rotor pump A's in this embodiment the pump body 1, the relief valve opening is located the position that is close to high-pressure chamber 5, and relief valve opening and oil-out 10 intercommunication, this relief valve opening is used for installing the relief valve. In addition, the last draining hole that can also set up of rotor pump A, the draining hole is located the position that is close to high-pressure chamber 1b, and install spring 5 a's position intercommunication in draining hole and the valve opening 1d, governing valve 5 is at the during operation, spring 5a can be frequent compressed and recover, for guaranteeing the motion that spring 5a can be smooth and easy, prevent the phenomenon of jamming, there is fluid in the cavity of installation spring 5a, these fluid should increase or reduce along with spring 5 a's motion, aforementioned draining hole just can play the function of discharging unnecessary fluid and supply fluid, of course, the chamber of a buffer fluid should communicate by the draining hole.

In designing the plunger 5b in the present embodiment, the joints between the rod-shaped portion 5b2 and the cylindrical portion 5b1 and the disk portion 5b3 are both of a slope structure, and when part of the high-pressure oil in the high-pressure chamber 1b is discharged into the low-pressure chamber 1a through the relay chamber, the high-pressure oil is buffered in the slope structure, so that the oil discharge process is performed slowly, the pressure fluctuation of the oil can be reduced, and the noise of the oil striking member can be reduced. Specifically, the projection is also rod-shaped, and the length of the rod-shaped portion 5b2 is 3 times the length of the projection. In order to avoid abnormal wear caused by direct contact of the pump body 1 (aluminum material) with the spring 5a, as shown in fig. 7, 8 and 9, a spring seat 5d may be installed at the bottom of the valve hole 1d, and one end of the spring 5a may be installed in the spring seat 5 d. In addition, there are many structures of the plug 5c in the regulating valve 5, and in this embodiment, an inner hexagonal plug with a simple structure is selected, as shown in fig. 7, 8 and 9, an annular step matching with a head of the inner hexagonal plug and a thread matching with a rod of the inner hexagonal plug are provided at an orifice of the valve hole 1d, preferably, a rubber gasket is further placed on the annular step, when the regulating valve is installed, the rod of the inner hexagonal bolt is screwed into the valve hole 1d through the rubber gasket, and the head of the inner hexagonal plug is fixed on the annular step.

In the background art, oil between the end faces of the crankshaft oil seal 7 and the inner rotor 3 in the rotor pump A and oil between the crankshaft oil seal 7 and the annular step 1e cannot be smoothly discharged, so that the use of the crankshaft oil seal 7 is influenced, and the following improvements can be made for solving the problem:

Before elaborating on the improvement, it should be noted that, on the engine block, an oil pan is located at the bottom of the pump body 1 of the rotor pump a, and the oil in the rotor pump a can flow back to the oil pan from the bottom of the pump body 1.

Different from the traditional rotor pump, the edge of the mounting surface of the pump body 1 is provided with a frame, the frame at the lower part of the pump body 1 is provided with a notch 1h, the pump cover 2 is mounted on the mounting surface of the pump body 1, the surface of the pump cover 2 is lower than the frame of the pump body 1, the shaft hole of the inner rotor 3 is axially provided with a plurality of oil discharge grooves 3a with the same length as the shaft hole of the inner rotor 3, oil between the crankshaft oil seal 7 and the end surface of the inner rotor 3 can be discharged from one side of the inner rotor 3 close to the crankshaft oil seal 7 to one side of the inner rotor 3 close to the pump cover 2 through the oil discharge grooves 3a, then is discharged outside the pump cover 2 through the shaft hole of the pump cover 2, and finally flows; by improving the structure in the rotor pump A, oil between the crankshaft oil seal 7 and the end face of the inner rotor 3 can be well and smoothly discharged into an oil pan, so that the impact pressure of the oil on the crankshaft oil seal 7 is greatly reduced, and the adverse effect on the crankshaft oil seal 7 is reduced;

different from the traditional rotor pump, the pump body 1 is also provided with an inclined oil hole 1i, the inlet of the inclined oil hole 1i is arranged on the annular step 1e, the outlet is arranged at the bottom of the pump body 1, and oil liquid and impurities between the crankshaft oil seal 7 and the annular step 1e can be discharged into an oil pan through the inclined oil hole 1 i; through improving above-mentioned structure in the rotor pump A, fluid on the annular step 1e will obtain continuous renewal along with rotor pump A's operation, so can effectively avoid old fluid and impurity to corrode bent axle oil blanket 7, reduce bent axle oil blanket 7 life's problem.

Generally speaking, the output end of the crankshaft 6 is provided with a plurality of splines, in order to enable the crankshaft 6 to drive the inner rotor 3 to rotate, the shaft hole of the inner rotor 3 should also be provided with a plurality of key slots 3b which are matched with the splines of the crankshaft 6 one by one, the number of the oil discharge grooves 3a and the number of the key slots 3b are respectively 6, and the 6 oil discharge grooves 3a and the 6 key slots 3b are distributed at intervals; according to the structural distribution, oil between the crankshaft oil seal 7 and the end face of the inner rotor 3 can be more fully and uniformly discharged into the oil pan.

The shape of the oil discharge groove 3a is various, and the most conventional shape is selected in the present embodiment, that is, the oil discharge groove 3a is a semicircular or square notched groove, the depth of the oil discharge groove 3a is equal to the depth of the key groove 3b, and the opening width of the oil discharge groove 3a is 1/3 of the opening width of the key groove 3 b.

As can be seen from fig. 11, the annular step 1e is spaced from the bottom of the pump body 1 by a certain distance, and the oil between the crankshaft oil seal 7 and the annular step 1e is mainly concentrated at the corner of the annular step 1e, and in order to smoothly and rapidly drain the oil therein to the oil pan at the bottom of the pump body 1, as shown in fig. 11, the oblique oil hole 1i may include a first oblique oil hole 1i1 and a second oblique oil hole 1i2 which are obliquely formed, an inlet of the first oblique oil hole 1i1 is formed at the corner of the annular step 1e, an outlet of the first oblique oil hole 1i1 is communicated with an inlet of the second oblique oil hole 1i2, and an outlet of the second oblique oil hole 1i2 is formed at the bottom of the pump body 1. During operation, oil between the crankshaft oil seal 7 and the annular step 1e firstly enters the first oblique oil hole 1i1 through the inlet of the first oblique oil hole 1i1, and then sequentially passes through the first oblique oil hole 1i1 and the second oblique oil hole 1i2, and then is discharged from the outlet of the second oblique oil hole 1i2 and flows into the oil pan.

Under the certain condition of pump body 1 wall thickness, more improved the discharge capacity of fluid and impurity, can make the shape design of first oblique oilhole 1i1 and second oblique oilhole 1i2 be the ellipse, compare circular oblique oilhole, the sectional area of this kind of oval oblique oilhole will be bigger, and the fluid that the single can pass through will be more.

in the above embodiment, the pump cover 2 is provided with an oil inlet 2a at a position facing the oil inlet cavity 1c of the pump body 1, the edge of the oil inlet 2a is provided with a molded rubber sealing ring, and the thickness of the rubber sealing ring is equal to the height difference between the frame of the pump body 1 and the pump cover 2. The purpose of the design is as follows: when the rotor pump structure of the integrated water pump is installed on an engine cylinder body, no gap exists between the installation surface of the rotor pump A and the edge of the oil inlet 2a, the sealing performance of an oil inlet channel is guaranteed, and when the rotor pump A works, oil liquid in an oil pan can smoothly enter the oil inlet cavity 1c of the pump body 1 through the oil inlet 2a and then is sucked into the low-pressure cavity 1 a.

Rotor pump A is at the during operation, and the fluid between inner rotor 3 and the outer rotor 4 can be because of the effect friction pump cover 2 surfaces of centrifugal force, for lightening this kind of frictional force, and oil consumption reduction can use the shaft hole of pump cover 2 to set up two banding oil grooves as central symmetry on the side of pump cover 2 towards the rotor chamber, and these two oil grooves are just to inner rotor 3 and the outer rotor 4 of meshing each other, and the buffer fluid that these two oil grooves can be fine is to the impact of pump cover 2, solves aforementioned problem.

The above-mentioned embodiment is the utility model discloses the implementation scheme of preferred, in addition, the utility model discloses can also realize by other modes, any obvious replacement is all within the protection scope of the utility model under the prerequisite that does not deviate from this technical scheme design.

In order to make it easier for those skilled in the art to understand the improvement of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and in order to clarify, some other elements have been omitted from this document, those skilled in the art should recognize that these omitted elements may also constitute the content of the present invention.

Claims (10)

1. A rotor pump structure of an integrated water pump comprises a rotor pump (A) and a water pump (B) fixed on one side of the rotor pump (A); the rotor pump (A) comprises a pump body (1), a pump cover (2), an inner rotor (3), an outer rotor (4) and a regulating valve (5), wherein a low-pressure cavity (1 a), a high-pressure cavity (1 b), an oil inlet cavity (1 c) and a valve hole (1 d) for mounting the regulating valve (5) are formed in the mounting surface of the pump body (1), and an annular step (1 e) for mounting a crankshaft oil seal (7) is formed in the outer side surface of the pump body (1) in a manner of surrounding a shaft hole of the pump body (1); the water pump (B) is provided with a water inlet (8), a water outlet (9) and an oil outlet (10); oil feed chamber (1 c) and low pressure chamber (1 a) intercommunication, oil-out (10) and high pressure chamber (1 b) intercommunication, valve opening (1 d) communicate its characterized in that with low pressure chamber (1 a) and high pressure chamber (1 b) respectively:

the regulating valve (5) comprises a spring (5 a), a plunger (5 b) and a plug (5 c) which are sequentially arranged in a valve hole (1 d) from inside to outside, the plunger (5 b) is integrally in a high-foot cup shape and comprises a cylindrical part (5 b 1) at the inner end, a rod-shaped part (5 b 2) in the middle and a disc part (5 b 3) at the outer end, one end of the spring (5 a) is arranged in the cylindrical part (5 b 1), a transfer chamber is formed between the rod-shaped part (5 b 2) and the hole wall of the valve hole (1 d), a protrusion capable of abutting against the plug is arranged on the outer side of the disc part (5 b 3), a feedback oil cavity (1 d 1) is formed between the disc part (5 b 3) and the plug (5 c), and the cylindrical part (5 b 1) can plug or open the opening of the high-pressure cavity (1 b) to the valve hole (1 d);

The oil pump is characterized in that an oil guide hole (1 f) and a feedback oil hole (1 g) are further formed in the pump body (1), the oil guide hole (1 f) is transversely formed in the same side of the low-pressure cavity (1 a) and the high-pressure cavity (1 b), the feedback oil hole (1 g) is also located at a position close to the low-pressure cavity (1 a), one end of the feedback oil hole (1 g) is communicated with the oil guide hole (1 f), and the other end of the feedback oil hole (1 g) is vertically communicated with a feedback oil cavity (1 d 1).

2. The rotor pump structure of an integrated water pump according to claim 1, characterized in that: the feedback oil hole (1 g) is communicated with the oil guiding hole (1 f) through a circular hole (11), the feedback oil hole (1 g) is communicated with the feedback oil cavity (1 d 1) through a step hole (12), and the caliber of the step hole (12) is gradually reduced from the feedback oil hole (1 g) to the feedback oil cavity (1 d 1).

3. The rotor pump structure of an integrated water pump according to claim 2, characterized in that: the low-pressure chamber (1 a) includes first low-pressure chamber (1 a 1) and second low-pressure chamber (1 a 2), high-pressure chamber (1 b) with first low-pressure chamber (1 a 1) symmetry is around outside the shaft hole of the pump body (1), second low-pressure chamber (1 a 2) is around outside high-pressure chamber (1 b), the one end intercommunication oil feed chamber (1 c) of first low-pressure chamber (1 a 1), the other end and the one end intercommunication of second low-pressure chamber (1 a 2) of first low-pressure chamber (1 a 1), the other end and the middle part intercommunication of valve opening (1 d) of second low-pressure chamber (1 a 2), the middle part and the middle part intercommunication of valve opening (1 d) of high-pressure chamber (1 b).

4. the rotor pump structure of an integrated water pump according to claim 3, characterized in that: the joint of the rod-shaped part (5 b 2), the cylindrical part (5 b 1) and the disc part (5 b 3) is of a bevel structure; a spring seat (5 d) is installed at the bottom of the valve hole (1 d), and one end of the spring (5 a) is installed in the spring seat (5 d).

5. the rotor pump structure of an integrated water pump according to any one of claims 1 to 4, wherein:

The oil pump is characterized in that a frame is arranged on the edge of the mounting surface of the pump body (1), a notch (1 h) is formed in the frame at the lower part of the pump body (1), the pump cover (2) is mounted behind the mounting surface of the pump body (1), the surface of the pump cover (2) is lower than the frame of the pump body (1), a plurality of oil discharge grooves (3 a) with the same length as the shaft hole of the inner rotor (3) are axially formed in the shaft hole of the inner rotor (3), oil between the crankshaft oil seal (7) and the end surface of the inner rotor (3) can be discharged out of the pump cover (2) through the oil discharge grooves (3 a), and then flows into an oil pan through the notch (1 h) of;

The oil pump is characterized in that an inclined oil hole (1 i) is further formed in the pump body (1), an inlet of the inclined oil hole (1 i) is formed in an annular step (1 e), an outlet of the inclined oil hole (1 i) is formed in the bottom of the pump body (1), and oil between the crankshaft oil seal (7) and the annular step (1 e) can be discharged into the oil pan through the inclined oil hole (1 i).

6. The rotor pump structure of an integrated water pump according to claim 5, characterized in that: still set up on the shaft hole of inner rotor (3) with a plurality of keyways (3 b) of each spline one-to-one complex of bent axle (6), the quantity of oil extraction groove (3 a) and keyway (3 b) is 6 respectively, these 6 oil extraction grooves (3 a) and 6 keyway (3 b) alternate distribution.

7. The rotor pump structure of an integrated water pump according to claim 6, characterized in that: the oil discharge groove (3 a) is a semicircular or square notched groove, the depth of the oil discharge groove (3 a) is equal to that of the key groove (3 b), and the opening width of the oil discharge groove (3 a) is 1/3 of that of the key groove (3 b).

8. The rotor pump structure of an integrated water pump according to claim 7, characterized in that: the oblique oil hole (1 i) comprises a first oblique oil hole (1 i 1) and a second oblique oil hole (1 i 2), wherein the first oblique oil hole (1 i 1) is obliquely formed, the inlet of the first oblique oil hole (1 i 1) is formed in the corner of the annular step (1 e), the outlet of the first oblique oil hole (1 i 1) is communicated with the inlet of the second oblique oil hole (1 i 2), the outlet of the second oblique oil hole (1 i 2) is formed in the bottom of the pump body (1), and the cross sections of the first oblique oil hole (1 i 1) and the second oblique oil hole (1 i 2) are elliptical.

9. The rotor pump structure of an integrated water pump according to any one of claims 6 to 7, wherein: an oil inlet (2 a) is formed in the position, opposite to the oil inlet cavity (1 c) of the pump body (1), of the pump cover (2), a molded rubber sealing ring is arranged at the edge of the oil inlet (2 a), and the thickness of the rubber sealing ring is equal to the height difference between the frame of the pump body (1) and the pump cover (2).

10. The rotor pump structure of an integrated water pump according to claim 9, characterized in that: two strip-shaped oil grooves are symmetrically formed in the side face, facing the rotor cavity, of the pump cover (2) by taking the shaft hole of the pump cover (2) as the center, and the two oil grooves are opposite to the inner rotor (3) and the outer rotor (4) which are meshed with each other.