High-pressure pump with integral shaft sleeve
By adopting an integral shaft sleeve and filter mesh in the high-pressure pump, the problems of gear wear and liquid pollution in the prior art are solved, and a more stable, quieter and cleaner liquid delivery effect is achieved.
Patent Information
- Application Number
- CN202421933376.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-08-12
AI Technical Summary
In existing high-pressure pumps, independently-installed shaft sleeves cause gears to move in the axial direction when working, which easily causes wear, increases noise and contaminates liquids.
An integral bushing is adopted, and the driving gear and driven gear are arranged on one bushing. The gear end face pressure is reduced through the unloading groove, and a filter is provided in the oil inlet and oil outlet passages to prevent impurities from entering.
It effectively prevents gear wear, reduces noise, and ensures the cleanliness of the liquid, avoids liquid contamination.
Smart Images
Figure CN222810937U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of high-pressure pumps, in particular to a high-pressure pump with an integral shaft sleeve. Background Art
[0002] In the high-pressure pump of the prior art, two gears that mesh with each other are arranged to work. In order to reduce the wear of the gears on the pump body during operation, a shaft sleeve is arranged on the shaft of the gear. In order to achieve hydraulic balance in the high-pressure pump, the two shaft sleeves are arranged independently. Since the two shaft sleeves are installed independently, the two gears can move along their axial directions during operation, which easily causes wear between one gear and the other shaft sleeve. After wear, the noise of the high-pressure pump increases, and the liquid passing through the high-pressure pump is contaminated by wear debris. Utility Model Content
[0003] The utility model aims to overcome the deficiencies of the prior art and provide a high-pressure pump with an integral shaft sleeve.
[0004] The purpose of this utility model is achieved through the following technical solutions:
[0005] A high-pressure pump with an integral shaft sleeve comprises a pump body, a pump cover, a driving gear, a driven gear and a shaft sleeve, wherein the pump body is provided with the pump cover which is sealed with the pump body, a pump chamber is provided in the pump body, the driving gear and the driven gear are both provided in the pump chamber and cooperate with the pump chamber, the driving gear meshes with the driven gear, an oil inlet channel and an oil outlet channel which are connected with the pump chamber are provided on opposite sides in the pump chamber, an outlet of the oil inlet channel and an inlet of the oil outlet channel are both provided between the driving gear and the driven gear, one end of the driving gear and the driven gear are provided in the pump body, the other end of the driving gear and the driven gear are provided on the shaft sleeve, one end of the shaft sleeve is provided in the pump chamber and cooperates with the pump chamber, and the other end of the shaft sleeve is provided in the pump cover.
[0006] Furthermore, a first axial hole and a second axial hole are provided on the bottom of the pump chamber, a third axial hole and a fourth axial hole are provided on the sleeve, one end of the driving gear is arranged in the first axial hole, the other end of the driving gear is arranged in the third axial hole, one end of the driven gear is arranged in the second axial hole, and the other end of the driven gear is arranged in the fourth axial hole.
[0007] Furthermore, two sleeves are sealed and fixedly provided on the end of the shaft sleeve, the two sleeves are respectively coaxially arranged with the third shaft hole and the fourth shaft hole, and the ends of the driving gear and the driven gear are respectively arranged in the two sleeves.
[0008] Furthermore, the pump cover is provided with two penetrating stepped holes, the two sleeves are respectively provided in the two stepped holes, and the sleeves are sealed and matched with the stepped holes.
[0009] Furthermore, a first sealing ring and a gasket are sleeved on the outer wall of the sleeve, the first sealing ring and the gasket are both matched with the stepped hole, and the first sealing ring is arranged between the gasket and the shaft sleeve.
[0010] Furthermore, a sealing groove is provided on the pump body, a second sealing ring is sealingly provided in the sealing groove, and the second sealing ring is sealingly matched with the pump cover.
[0011] Furthermore, a first filter screen is sealed on the oil inlet passage.
[0012] Furthermore, a second filter screen is sealed on the oil outlet channel.
[0013] Furthermore, the pump cover is fixed to the pump body by bolts.
[0014] Furthermore, unloading grooves are provided on both sides of the end of the shaft sleeve, the unloading groove on one side is communicated with the oil inlet channel, and the unloading groove on the other side is communicated with the oil outlet channel.
[0015] The beneficial effects of the utility model are:
[0016] 1) In this technology, the driving gear and the driven gear are both arranged on a shaft sleeve, so that the driving gear and the driven gear are more stable during operation, and will not wear or generate noise, and will not cause the liquid passing through the high-pressure pump to be contaminated.
[0017] 2) In the present technology, the first filter and the second filter can be provided for better filtering. The first filter prevents impurities in the liquid from entering the pump chamber and causing wear to the driving gear and the driven gear, and the second filter ensures that the discharged liquid is free of impurities.
[0018] 3) In this technology, two unloading grooves are provided on the end of the sleeve, and the end surface pressure of the driving gear and the driven gear is reduced through the unloading grooves to prevent the driving gear and the driven gear from being worn due to the end surface pressure. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a three-dimensional connection structure diagram of the high-pressure pump;
[0020] Figure 2 The cross-sectional connection structure of the high-pressure pump Figure 1 ;
[0021] Figure 3 The cross-sectional connection structure of the high-pressure pump Figure 2 ;
[0022] Figure 4 This is a three-dimensional exploded structural diagram of the high-pressure pump;
[0023] Figure 5 The three-dimensional structure diagram of the pump body;
[0024] Figure 6 The three-dimensional structure diagram of the shaft sleeve;
[0025] In the figure, 1-pump body, 2-pump cover, 3-driving gear, 4-driven gear, 5-shaft sleeve, 6-pump chamber, 7-oil inlet channel, 8-oil outlet channel, 9-first shaft hole, 10-second shaft hole, 11-third shaft hole, 12-fourth shaft hole, 13-sleeve, 14-step hole, 15-first sealing ring, 16-gasket, 17-sealing groove, 18-second sealing ring, 19-first filter screen, 20-second filter screen, 21-bolt, 22-unloading groove. DETAILED DESCRIPTION
[0026] The following will be combined with the embodiments to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.
[0027] See also Figure 1-Figure 6 , the utility model provides a technical solution:
[0028] A high-pressure pump with an integral shaft sleeve comprises a pump body 1, a pump cover 2, a driving gear 3, a driven gear 4 and a shaft sleeve 5. The pump body 1 is provided with a pump cover 2 which is sealed with the pump body 1. A pump chamber 6 is provided in the pump body 1. The driving gear 3 and the driven gear 4 are both provided in the pump chamber 6 and are matched with the pump chamber 6. The driving gear 3 meshes with the driven gear 4. An oil inlet channel 7 and an oil outlet channel 8 which are connected with the pump chamber 6 are provided on opposite sides of the pump chamber 6. The outlet of the oil inlet channel 7 and the inlet of the oil outlet channel 8 are both provided between the driving gear 3 and the driven gear 4. One end of the driving gear 3 and the driven gear 4 is provided in the pump body 1. The other end of the driving gear 3 and the driven gear 4 is provided in the shaft sleeve 5. One end of the shaft sleeve 5 is provided in the pump chamber 6 and is matched with the pump chamber 6. The other end of the shaft sleeve 5 is provided in the pump cover 2. A sealing groove 17 is provided on the pump body 1. A second sealing ring 18 is provided in the sealing groove 17. The second sealing ring 18 is sealed with the pump cover 2. The pump cover 2 is fixed to the pump body 1 by bolts 21. The pump cover 2 is fixed to the pump body 1 by two symmetrically arranged bolts 21. The pump cover 2 and the pump body 1 are also provided with matching through holes. The long bolts simultaneously fix the pump cover 2 and the pump body 1 to the oil circuit board through the through holes. The pump body 1 and the oil circuit board are sealed and matched. The oil circuit board is respectively provided with oil circuit channels that match the oil inlet channel 7 and the oil outlet channel 8. The oil circuit board is fixed to the motor in the prior art. The output shaft on the motor is connected to the driving gear 3 through the coupling in the prior art. When the driving gear 3 rotates, it drives the driven gear 4 to rotate. The liquid enters from the oil inlet channel 7, and is discharged from the oil outlet channel 8 after being pressurized by the driving gear 3 and the driven gear 4. The inlet of the oil outlet channel 8 between the pump body 1 and the pump cover 2 is set in the second sealing ring 18. The second sealing ring 18 is a sealing ring in the prior art. The pump body 1 and the pump cover 2 are precisely positioned by two positioning pins.
[0029] In some embodiments, the bottom of the pump chamber 6 is provided with a first shaft hole 9 and a second shaft hole 10, the sleeve 5 is provided with a third shaft hole 11 and a fourth shaft hole 12, one end of the driving gear 3 is provided in the first shaft hole 9, the other end of the driving gear 3 is provided in the third shaft hole 11, one end of the driven gear 4 is provided in the second shaft hole 10, and the other end of the driven gear 4 is provided in the fourth shaft hole 12. Among them, the first shaft hole 9 and the third shaft hole 11 are used to install the gear shaft of the driving gear 3, and the second shaft hole 10 and the fourth shaft hole 12 are used to install the gear shaft of the driven gear 4.
[0030] In some embodiments, two sleeves 13 are sealed and fixedly provided on the end of the shaft sleeve 5, and the two sleeves 13 are respectively coaxially arranged with the third shaft hole 11 and the fourth shaft hole 12, and the ends of the driving gear 3 and the driven gear 4 are respectively arranged in the two sleeves 13. Two through-going stepped holes 14 are provided on the pump cover 2, and the two sleeves 13 are respectively arranged in the two stepped holes 14, and the sleeves 13 and the stepped holes 14 are sealed. Among them, the two sleeves 13 are provided to better achieve sealing with the stepped holes 14, and the stepped holes 14 are set as through holes to add lubricating oil.
[0031] In some embodiments, a first sealing ring 15 and a gasket 16 are sleeved on the outer wall of the sleeve 13, and both the first sealing ring 15 and the gasket 16 are matched with the stepped hole 14, and the first sealing ring 15 is arranged between the gasket 16 and the shaft sleeve 5. The first sealing ring 15 and the gasket 16 are arranged to prevent the liquid between the pump body 1 and the pump cover 2 from flowing out of the stepped hole 14, and the first sealing ring 15 is a sealing ring in the prior art.
[0032] In some embodiments, a first filter screen 19 is sealed on the oil inlet channel 7. The liquid will carry impurities during the flow process. If the impurities directly enter the pump chamber 6, it will cause wear between the driving gear 3 and the driven gear 4. After wear, the working efficiency of the high-pressure pump will decrease. Therefore, the first filter screen 19 is set to filter the liquid entering the pump chamber 6.
[0033] In some embodiments, a second filter screen 20 is sealed on the oil outlet channel 8. Part of the liquid enters between the pump body 1 and the pump cover 2 through the gap between the inner wall of the pump chamber 6 and the outer wall of the shaft sleeve 5, and impurities in this part of the liquid can be removed by the second filter screen 20.
[0034] In some embodiments, unloading grooves 22 are provided on both sides of the end of the sleeve 5, and the unloading groove 22 on one side is communicated with the oil inlet channel 7, and the unloading groove 22 on the other side is communicated with the oil outlet channel 8. In the operation of the high-pressure pump, part of the liquid will enter the end faces of the driving gear 3 and the driven gear 4, so that the end faces of the driving gear 3 and the driven gear 4 are squeezed, and friction occurs between the squeezed driving gear 3 and the driven gear 4 and the bottom of the pump chamber 6. The friction easily leads to the generation of debris, and it is also easy to generate noise or even damage in long-term use. The provision of two unloading grooves 22 can effectively prevent the ends of the driving gear 3 and the driven gear 4 from being squeezed by liquid, and at the same time prevent the liquid from being discharged through the third shaft hole 11, the fourth shaft hole 12 and the stepped hole 14.
[0035] In the description of the present invention, it should be understood that the terms "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0036] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation", "hinge" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.
[0037] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.
Claims
1. A high-pressure pump with an integral sleeve, characterized in that: The invention comprises a pump body (1), a pump cover (2), a driving gear (3), a driven gear (4) and a shaft sleeve (5); the pump body (1) is provided with the pump cover (2) which is sealed with the pump body (1); a pump chamber (6) is provided in the pump body (1); the driving gear (3) and the driven gear (4) are both provided in the pump chamber (6) and are matched with the pump chamber (6); the driving gear (3) and the driven gear (4) are meshed with each other; and oil inlet passages (7) which are connected with the pump chamber (6) are provided on opposite sides of the pump chamber (6). ) and an oil outlet passage (8), the outlet of the oil inlet passage (7) and the inlet of the oil outlet passage (8) are both arranged between the driving gear (3) and the driven gear (4), one end of the driving gear (3) and the driven gear (4) are arranged in the pump body (1), the other end of the driving gear (3) and the driven gear (4) are arranged in the shaft sleeve (5), one end of the shaft sleeve (5) is arranged in the pump chamber (6) and cooperates with the pump chamber (6), and the other end of the shaft sleeve (5) is arranged in the pump cover (2).
2. The high-pressure pump with an integral sleeve according to claim 1, characterized in that: A first axial hole (9) and a second axial hole (10) are provided on the bottom of the pump chamber (6), a third axial hole (11) and a fourth axial hole (12) are provided on the shaft sleeve (5), one end of the driving gear (3) is arranged in the first axial hole (9), the other end of the driving gear (3) is arranged in the third axial hole (11), one end of the driven gear (4) is arranged in the second axial hole (10), and the other end of the driven gear (4) is arranged in the fourth axial hole (12).
3. The high-pressure pump with an integral sleeve according to claim 2, characterized in that: Two sleeves (13) are sealed and fixedly arranged on the end of the shaft sleeve (5); the two sleeves (13) are coaxially arranged with the third shaft hole (11) and the fourth shaft hole (12), respectively; and the ends of the driving gear (3) and the driven gear (4) are respectively arranged in the two sleeves (13).
4. The high-pressure pump with an integral sleeve according to claim 3, characterized in that: The pump cover (2) is provided with two through-going stepped holes (14), the two sleeves (13) are respectively arranged in the two stepped holes (14), and the sleeves (13) are sealed and matched with the stepped holes (14).
5. The high-pressure pump with an integral sleeve according to claim 4, characterized in that: A first sealing ring (15) and a gasket (16) are sleeved on the outer wall of the sleeve (13); the first sealing ring (15) and the gasket (16) are both matched with the stepped hole (14); and the first sealing ring (15) is arranged between the gasket (16) and the shaft sleeve (5).
6. A high pressure pump with an integral sleeve according to any one of claims 1 to 5, characterized in that: The pump body (1) is provided with a sealing groove (17), a second sealing ring (18) is sealingly provided in the sealing groove (17), and the second sealing ring (18) is sealingly matched with the pump cover (2).
7. A high pressure pump with an integral sleeve according to any one of claims 1 to 5, characterized in that: A first filter screen (19) is sealed on the oil inlet passage (7).
8. The high-pressure pump with an integral sleeve according to any one of claims 1 to 5, characterized in that: A second filter screen (20) is sealed on the oil outlet channel (8).
9. The high-pressure pump with an integral sleeve according to any one of claims 1 to 5, characterized in that: The pump cover (2) is fixed to the pump body (1) by means of bolts (21).
10. The high-pressure pump with an integral sleeve according to any one of claims 1 to 5, characterized in that: Unloading grooves (22) are provided on both sides of the end of the shaft sleeve (5); the unloading groove (22) on one side is communicated with the oil inlet channel (7), and the unloading groove (22) on the other side is communicated with the oil outlet channel (8).