Double-cylinder high-pressure water pump

Abstract

The invention relates to the field of water pumps, in particular to a double-cylinder high-pressure water pump. The double-cylinder mechanism comprises a power shaft and a plunger which are arranged in the crankcase, an eccentric shaft is arranged at the top of the power shaft, a bearing is arranged on the eccentric shaft, a containing groove is formed in the plunger, and the eccentric shaft and the bearing on the eccentric shaft are arranged in the containing groove; the water flow channel is arranged on the crankcase and comprises two high-pressure chambers, each high-pressure chamber is connected with a water inlet channel and a water outlet channel, the water inlet ends of the two water inlet channels are connected to a water inlet, the two water outlet channels are converged to form a high-pressure water outlet channel, and one-way valves are arranged on each water inlet channel and each water outlet channel; the crankcase is provided with a water cooling chamber which is communicated with the water inlet channel and surrounds the power shaft. According to the double-cylinder high-pressure pump, a traditional crank connecting rod transmission mechanism is replaced with the mechanism mode that the eccentric shaft and the bearing control the plunger to reciprocate, a power transmission structure is simplified, the energy utilization rate is increased, occupied space is reduced, and the double-cylinder high-pressure pump can be cooled through inflow water.

Description

Technical Field

[0001] The present invention relates to the technical field of high-pressure water pumps, and in particular to a double-cylinder high-pressure water pump. Background Art

[0002] At present, the known high-pressure plunger water pump is composed of a plunger, a suction valve, a discharge valve and a crank-connecting rod mechanism. The plunger reciprocates under the push of an external force to change the volume and pressure in the working chamber, and multiple plungers / pistons are arranged in parallel and reciprocate in the same direction. When negative pressure is formed in the working chamber, liquid enters the working chamber through the suction valve. When the reciprocating movement of the plunger opens and closes the suction and discharge valves, the volume in the working chamber changes, thereby generating pressure and causing the liquid to be discharged from the discharge valve.

[0003] Existing crank-connecting rod mechanism plunger pumps often have the following problems:

[0004] 1. The transmission between the external force and the plunger adopts a crank-connecting rod mechanism, which has a complex structure and large energy loss. In addition, the linkage structure of the crank and the connecting rod occupies a large space, which leads to a large overall volume of the pump body.

[0005] 2. Lack of effective cooling device. Existing crank-connecting rod mechanism plunger pumps mostly rely on the heat sink structure on the crank-connecting rod mounting box to dissipate heat, which has poor heat dissipation effect. Alternatively, a single-channel cooling water flow structure is set on the crank-connecting rod mounting box to dissipate heat, but it cannot achieve the efficient cooling effect of overall surrounding water cooling.

[0006] 3. The existing crank-connecting rod mechanism plunger pump has a complex assembly structure, which is time-consuming and labor-intensive to disassemble and assemble, and inconvenient to maintain.

[0007] The prior art Chinese patent with publication number CN106224192A discloses a crankshaft type double piston high pressure pump, which adopts a structure in which a crank-connecting rod mechanism drives the reciprocating motion of the piston. The crank-connecting rod mechanism has a complex structure, large energy loss, and occupies a large space.

[0008] Therefore, there is an urgent need to develop a new type of power transmission structure to achieve efficient energy transmission and self-cooling, achieve ultra-high effective service life while having low energy consumption and high efficiency, and extend the maintenance cycle to reduce maintenance costs. Summary of the invention

[0009] The present invention aims to solve at least one of the technical problems existing in the prior art. The present invention provides a twin-cylinder water pump that replaces the traditional crankshaft crank and connecting rod connection to transmit power, solves the problem of superposition of power consumption of the power source of the traditional crank-connecting rod structure, increases the effective work efficiency, and can achieve an efficient cooling structure for fully surrounding cooling of the crankcase that is cooled as soon as the machine is turned on, thereby realizing a twin-cylinder high-pressure pump that utilizes the incoming water for sufficient self-cooling.

[0010] The present invention aims to solve the shortcomings of the existing high-pressure pump, such as the traditional crank-connecting rod power output structure, increased pump body temperature, overlapping power loss, and large pump body volume. The present invention provides a double-cylinder high-pressure water pump that replaces the traditional crankshaft and connecting rod transmission double-cylinder pump body, utilizes water intake for self-cooling, reduces power loss, is small in size, and is suitable for narrow areas.

[0011] Double cylinder high pressure water pump, including:

[0012] Crankcase;

[0013] The double-cylinder mechanism is installed in the crankcase, and includes a power shaft for power input and rotating around its own axis and a plunger controlled by the power shaft to move back and forth linearly. An eccentric shaft is provided on the top of the power shaft, and a bearing is sleeved on the eccentric shaft. A receiving groove is provided on the bottom side of the middle part of the plunger. The eccentric shaft and the bearing on the eccentric shaft are both arranged in the receiving groove. A channel for moving the plunger and maintaining the orientation is provided on the crankcase, and the two ends of the plunger can move in the channel;

[0014] A water flow channel is provided on the crankcase, comprising two water inlet channels differentiated from a water inlet, a high-pressure water outlet channel formed by two water outlet channels, and two high-pressure chambers. The two high-pressure chambers are provided on the crankcase and are respectively provided at two end positions of the plunger. The water inlet end of each high-pressure chamber is connected to a water inlet channel, and the water outlet end is connected to a water outlet channel. A one-way valve is provided on each water inlet channel and each water outlet channel. The one-way valve on the water inlet channel controls the water flow to flow only from the water inlet to the high-pressure chamber, and the one-way valve on the water outlet channel controls the water flow to flow only from the high-pressure chamber to the high-pressure water outlet channel.

[0015] The power shaft rotates, and the reciprocating movement of the plunger is controlled through the eccentric shaft and the bearing on the eccentric shaft. The end of the plunger enters and exits the high-pressure chamber to control the water inlet and outlet of the high-pressure chamber. The end of the plunger is away from the high-pressure chamber, and water enters the high-pressure chamber through the water inlet channel. The end of the plunger enters the high-pressure chamber, and water is discharged from the high-pressure chamber through the water outlet channel.

[0016] Furthermore, a water cooling chamber is provided between the water inlet and the two water inlet channels, the water cooling chamber is arranged around the power shaft, the water inlet is arranged on the water cooling chamber, the two water inlet channels are respectively connected to the water cooling chamber, and the water cooling chamber is arranged around the power shaft to perform a full-wrap cooling function.

[0017] Furthermore, the crankcase includes a crankcase shell, two high-pressure chamber shells and a high-pressure water outlet shell, the two high-pressure chamber shells are respectively connected to the two sides of the crankcase shell, and the high-pressure water outlet shell is arranged above the crankcase shell and the two ends are respectively connected to a high-pressure chamber shell;

[0018] The crankcase shell is provided with a power shaft placement cavity, and the crankcase shell is provided with a first plunger channel arranged on both sides of the power shaft placement cavity and connected with the power shaft placement cavity;

[0019] A high-pressure chamber is arranged in the high-pressure chamber shell, a first water outlet channel is arranged at the water outlet end of the high-pressure chamber, a first water inlet channel is arranged at the water inlet end of the high-pressure chamber, and a second plunger channel communicating with the high-pressure chamber is arranged in the high-pressure chamber shell near the crankcase shell side;

[0020] The plunger can move in the first plunger channel and the second plunger channel. A wear-resistant bushing sleeved on the plunger is fixed in the first plunger channel. An oil seal is provided between the plunger and the end of the wear-resistant bushing away from the power shaft placement cavity. A secondary water seal bracket, a main water seal and a secondary water seal sleeved on the plunger are fixed in the second plunger channel. The main water seal is provided at one end of the secondary water seal bracket close to the high-pressure chamber, and the secondary water seal is provided at one end of the secondary water seal bracket close to the wear-resistant bushing.

[0021] A high-pressure water outlet channel is arranged in the high-pressure water outlet housing, and the water inlet end of the high-pressure water outlet channel is connected to two second water outlet channels, and the inlet of each second water outlet channel is connected to the corresponding first water outlet channel;

[0022] The crankcase shell is provided with a second water inlet channel communicating with the water cooling chamber, and the second water inlet channel is communicated with the first water inlet channel;

[0023] One-way valves are arranged at the entrance of the second water outlet channel on the high-pressure water outlet shell and at the entrance of the first water inlet channel on the high-pressure chamber shell.

[0024] Further, the one-way valve comprises a valve bonnet and a valve housing, the valve bonnet is connected to the water inlet end of the valve housing, the bonnet axis passes through to form a water inlet hole, a water outlet hole is arranged on the side wall of the valve housing, and a valve plate and a spring are arranged inside the valve housing;

[0025] The valve housing comprises a docking ring, the valve cap is connected to the docking ring, a plurality of support columns are evenly distributed on the side of the docking ring away from the valve cap, a valve plate limiting ring and a spring limiting ring connected to the support columns are arranged on the inner sides of the plurality of support columns, the diameter of the spring limiting ring is smaller than the diameter of the valve plate limiting ring, the valve plate limiting ring is arranged between the spring limiting ring and the docking ring, the valve plate is arranged between the valve plate limiting ring and the valve cap, the spring is arranged between the spring limiting ring and the valve plate, one end of the spring abuts against the valve plate, and the other end abuts against the spring limiting ring, and a reinforcing rib is arranged between the end of the support column away from the docking ring and the spring limiting ring;

[0026] The water outlet hole is arranged between the valve plate limiting ring and the docking ring. The valve plate moves between the valve plate limiting ring and the valve cap to control the opening and closing of the water outlet hole. The space between two adjacent support columns is connected to the water outlet hole to form a main circulation channel.

[0027] Furthermore, the water cooling chamber includes a water storage ring groove arranged on the outside of the bottom end of the crankcase shell and a water jacket arranged on the outside of the water storage ring groove, and sealing rings are arranged between the top and bottom ends of the inner wall of the water jacket and the crankcase shell.

[0028] Furthermore, the power shaft is arranged in the power shaft placement cavity, and bearings are arranged between the top end and the bottom end of the power shaft and the inner wall of the power shaft placement cavity;

[0029] A sealing ring is arranged between the power shaft and the power shaft placement cavity at a position below the bearing at the bottom end of the power shaft.

[0030] Furthermore, a blind cover is provided on the top of the crankcase shell and arranged on the top of the power shaft placement cavity. The power shaft placement cavity is filled with lubricating oil, and a refueling port connected to the power shaft placement cavity is provided on the crankcase shell.

[0031] Furthermore, the inner wall of the wear-resistant bushing close to one end of the power shaft placement cavity is provided with a spiral channel connected to the power shaft placement cavity for circulating lubricating oil and increasing lubrication.

[0032] Furthermore, an overflow channel communicating with the outside is provided in the cavity between the oil seal and the auxiliary water seal.

[0033] Furthermore, a first return water hole is provided on the secondary water seal bracket between the main water seal and the secondary water seal, a return water channel is provided on the high-pressure chamber shell, and a second return water hole connected to the water inlet hole is provided on the valve cap of the one-way valve on the water inlet channel, and the first return water hole, the return water channel and the second return water hole are connected.

[0034] Compared with the prior art, the present invention has the following beneficial effects: the present invention has a reasonable structure, adopts an eccentric shaft and a bearing to control the reciprocating motion of the plunger to replace the traditional crank-connecting rod transmission mechanism, simplifies the power transmission structure, improves the power transmission effect, improves the energy utilization rate, reduces the space occupation, and reduces the overall space occupation of the high-pressure water pump. Specifically, compared with the existing crank-connecting rod mechanism, the transmission between the power shaft and the plunger of the present invention mainly reduces the connecting rod structure;

[0035] The present invention is provided with a water cooling chamber, and the cold water entering the water inlet channel of the high-pressure chamber shell is used to cool the crankcase shell through the water cooling chamber wrapped in the crankcase shell, specifically to cool the lubricating oil in the power shaft placement cavity, and then to cool the power shaft, plunger and matching parts, thereby avoiding high temperature damage and increasing the service life of the pump body;

[0036] The present invention provides one-way valves on both the water inlet channel and the water outlet channel to ensure the flow direction of the water flow. Specifically, the one-way valve support column is higher than the valve housing, the axial through diameter is increased, and the area between adjacent support columns is used as a water outflow channel, which effectively increases the flow rate and flow, avoids cross-flow, and improves stability.

[0037] The crankcase of the present invention adopts a disassembled assembly structure of a crankcase shell, two high-pressure chamber shells and a high-pressure water outlet shell, which is convenient for disassembly and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 1 is an exploded schematic diagram of a double-cylinder high-pressure water pump of the present invention;

[0039] Figure 2 is a cross-sectional schematic diagram of a double-cylinder high-pressure water pump of the present invention;

[0040] Figure 3 yes Figure 2 The enlarged schematic diagram at A in the middle;

[0041] Figure 4 Schematic diagram of the water cooling chamber structure of the double-cylinder high-pressure water pump of the present invention;

[0042] Figure 5 It is a three-dimensional schematic diagram of a one-way valve of a double-cylinder high-pressure water pump of the present invention;

[0043] Figure 6 It is a cross-sectional schematic diagram of a one-way valve of a double-cylinder high-pressure water pump of the present invention;

[0044] Figure 7 It is a schematic diagram of the spiral channel on the inner surface of the wear-resistant bushing of the double-cylinder high-pressure water pump of the present invention;

[0045] Figure 8 It is a schematic diagram of the combined appearance of the double-cylinder high-pressure water pump of the present invention;

[0046] Fig. 9 It is a schematic diagram of a connection method between the power shaft and the power motor of the double-cylinder high-pressure water pump of the present invention;

[0047] Fig.10 yes Figure 2 Enlarged schematic diagram of point B in the middle.

[0048] As shown in the figure: 1. power shaft; 2. plunger; 3. eccentric shaft; 4. bearing; 5. receiving groove; 6. water inlet; 7. water inlet channel; 8. water outlet channel; 9. high-pressure water outlet channel; 10. high-pressure chamber; 11. one-way valve; 12. water cooling chamber; 13. crankcase shell; 14. high-pressure chamber shell; 15. high-pressure water outlet shell; 16. power shaft placement chamber; 17. first plunger channel; 18. second plunger channel; 19. wear-resistant bushing; 20. oil seal; 21. auxiliary water seal bracket; 22. main water seal; 23. auxiliary water seal; 24. sealing ring; 25. cover; 26. refueling port; 27. spiral channel; 28. overflow channel; 29. ​​input flange; 30. first return water hole; 31. return water channel; 32. second return water hole;

[0049] 701, first water inlet channel; 702, second water inlet channel;

[0050] 801, first water outlet channel; 802, second water outlet channel;

[0051] 1101, valve cap; 1102, water inlet hole; 1103, water outlet hole; 1104, valve plate; 1105, spring; 1106, docking ring; 1107, support column; 1108, valve plate limiting ring; 1109, spring limiting ring; 1110, reinforcing rib;

[0052] 1201. Water storage ring groove; 1202. Water jacket. DETAILED DESCRIPTION

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" 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, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0055] In the description of the embodiments of the present invention, if a feature is referred to as being "set", "fixed", "connected" or "installed" on another feature, it may be directly set, fixed, connected to another feature, or indirectly set, fixed, connected, or installed on another feature.

[0056] In the description of the embodiments of the present invention, if "several" is involved, it means more than one, if "multiple" is involved, it means more than two, if "greater than", "less than" or "exceed" is involved, it should be understood as not including the number itself, if "above", "below" or "within" is involved, it should be understood as including the number itself. If "first" or "second" is involved, it should be understood as being used to distinguish technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0057] The following describes a double-cylinder high-pressure water pump according to an embodiment of the present invention with reference to the accompanying drawings as an example.

[0058] like Figure 1 and 2 As shown, a double-cylinder high-pressure water pump comprises:

[0059] Crankcase;

[0060] The double-cylinder mechanism comprises a power shaft 1 installed in a crankcase for power input and rotating around its own axis, and a plunger 2 controlled by the power shaft 1 to move back and forth linearly, an eccentric shaft 3 is provided on the top of the power shaft 1, a bearing 4 is sleeved on the eccentric shaft 3, a receiving groove 5 is provided on the bottom side of the middle part of the plunger 2, the eccentric shaft 3 and the bearing 4 on the eccentric shaft 3 are both arranged in the receiving groove 5, a channel for the movement of the plunger 2 is provided on the crankcase, and the two ends of the plunger 2 move in the channel;

[0061] The water flow channel is arranged on the crankcase, including two water inlet channels 7 differentiated from a water inlet 6, a high-pressure water outlet channel 9 merged from two water outlet channels 8, and two high-pressure chambers 10. The water inlet 6 is equipped with a water inlet joint. The two high-pressure chambers 10 are arranged on the crankcase and are respectively arranged at the end positions of the plunger 2. The water inlet end of each high-pressure chamber 10 is connected to a water inlet channel 7, and the water outlet end is connected to a water outlet channel 8. A one-way valve 11 is arranged on each water inlet channel 7 and each water outlet channel 8. The one-way valve 11 on the water inlet channel 7 controls the water flow to flow only from the water inlet 6 to the high-pressure chamber 10, and the one-way valve 11 on the water outlet channel 8 controls the water flow to flow only from the high-pressure chamber 10 to the high-pressure water outlet channel 9;

[0062] The power shaft 1 rotates, and the reciprocating movement of the plunger 2 is controlled by the eccentric shaft 3 and the bearing 4 on the eccentric shaft 3. The end of the plunger 2 enters and exits the high-pressure chamber 10 to control the water inlet and outlet of the high-pressure chamber 10. The end of the plunger 2 is away from the high-pressure chamber 10, and the high-pressure chamber 10 takes in water through the water inlet channel 7. The end of the plunger 2 enters the high-pressure chamber 10, and the high-pressure chamber 10 discharges water through the water outlet channel 8.

[0063] As a preferred implementation of this embodiment, Figure 1 , Figure 2 and Figure 4 As shown, on the crankcase, a water cooling chamber 12 is provided between the water inlet 6 and the two water inlet channels 7, the water cooling chamber 12 is arranged around the power shaft 1, the water inlet 6 is arranged on the water cooling chamber 12, the two water inlet channels 7 are respectively connected to the water cooling chamber 12, and the water cooling chamber 12 is arranged around the power shaft 1 to play a cooling function;

[0064] The water cooling chamber 12 includes a water storage ring groove 1201 arranged on the outside of the bottom end of the crankcase shell 13 and a water jacket 1202 sleeved on the outside of the water storage ring groove 1201. The water jacket 1202 is cylindrical and sleeved on the crankcase shell 13. Sealing rings 24 are provided between the water jacket 1202 and the crankcase shell 13, above the water storage ring groove 1201 and below the water storage ring groove 1201.

[0065] As a preferred implementation of this embodiment, Figure 1 and Figure 2 As shown, the crankcase includes a crankcase shell 13, two high-pressure chamber shells 14 and a high-pressure water outlet shell 15. The two high-pressure chamber shells 14 are respectively connected to the two sides of the crankcase shell 13. The high-pressure water outlet shell 15 is arranged above the crankcase shell 13 and the two ends are respectively connected to a high-pressure chamber shell 14.

[0066] The crankcase shell 13 is provided with a power shaft placement cavity 16, and the crankcase shell 13 is provided with a first plunger channel 17 which is arranged on both sides of the power shaft placement cavity 16 and communicates with the power shaft placement cavity 16;

[0067] The power shaft 1 is arranged in the power shaft placement cavity 16, and a bearing 4 is arranged between the top and bottom ends of the power shaft 1 and the inner wall of the power shaft placement cavity 16, and the bearing 4 can be a tapered roller bearing. A sealing ring 24 is arranged between the power shaft 1 and the power shaft placement cavity 16 at a position below the bearing 4 at the bottom end of the power shaft 1, and the sealing ring 24 is arranged at this position to prevent lubricating oil from leaking from this place;

[0068] The power shaft cavity 16 is filled with lubricating oil, and external water enters the water cooling chamber 12 to cool the lubricating oil in the power shaft cavity 16, thereby cooling the power shaft 1 and the plunger 2, thereby extending the service life of the pump body.

[0069] As a preferred implementation scheme of this embodiment, a high-pressure chamber 10 is arranged in the high-pressure chamber shell 15, a first water outlet channel 801 is arranged at the water outlet end of the high-pressure chamber 10, and a first water inlet channel 701 is arranged at the water inlet end, and a second plunger channel 18 communicating with the high-pressure chamber 10 is arranged in the high-pressure chamber shell 15 near the crankcase shell 13;

[0070] like Figure 3As shown, the plunger 2 can move in the first plunger channel 17 and the second plunger channel 18. A wear-resistant bushing 19 sleeved on the plunger 2 is fixed in the first plunger channel 17. An oil seal 20 is provided between the end of the wear-resistant bushing 19 away from the power shaft placement cavity 16 and the plunger 2. A secondary water seal bracket 21, a main water seal 22 and a secondary water seal 23 sleeved on the plunger 2 are fixed in the second plunger channel 18. The main water seal 22 is provided at one end of the secondary water seal bracket 21 close to the high-pressure chamber 10, and the secondary water seal 23 is provided at one end of the secondary water seal bracket 21 close to the wear-resistant bushing 19. The oil seal 20 has a sealing effect of blocking the intrusion of lubricating oil, and the water injection seal 22 and the secondary water seal 23 have a sealing effect of blocking the intrusion of water.

[0071] A high-pressure water outlet channel 9 is provided in the high-pressure water outlet housing 15, and the water inlet end of the high-pressure water outlet channel 9 is connected to two second water outlet channels 802, and the inlet of each second water outlet channel 802 is connected to the corresponding first water outlet channel 801;

[0072] The crankcase shell 13 is provided with a second water inlet channel 702 communicating with the water cooling chamber 12, and the second water inlet channel 702 is communicated with the first water inlet channel 701;

[0073] A one-way valve 11 is provided at the entrance of the second water outlet channel 802 on the high-pressure water outlet housing 15 and at the entrance of the first water inlet channel 701 on the high-pressure chamber housing 15 .

[0074] As a preferred implementation of this embodiment, Figure 5 and 6 As shown, the one-way valve 11 comprises a valve bonnet 1101 and a valve housing, wherein the valve bonnet 1101 is connected to the water inlet end of the valve housing, the valve bonnet 1101 is axially penetrated to form a water inlet hole 1102, a water outlet hole 1103 is arranged on the side wall of the valve housing, and a valve plate 1104 and a spring 1105 are arranged in the valve housing;

[0075] The valve housing includes a docking ring 1106, the valve cap 1101 is connected to the docking ring 1106, and a plurality of support columns 1107 are evenly distributed on the side of the docking ring 1106 away from the valve cap 1101. A valve plate limiting ring 1108 and a spring limiting ring 1109 connected to the support columns 1107 are provided on the inner sides of the plurality of support columns 1107. The outer diameter of the spring limiting ring 1109 is smaller than the outer diameter of the valve plate limiting ring 1108. The valve plate limiting ring 1108 is provided on the spring limiting ring The valve plate 1104 is arranged between the valve plate limiting ring 1108 and the valve cap 1101, and the spring 1105 is arranged between the spring limiting ring 1109 and the valve plate 1104. One end of the spring 1105 abuts against the valve plate 1104, and the other end abuts against the spring limiting ring 1109. A reinforcing rib 1110 is arranged between the end of the support column 1107 away from the butt joint ring 1106 and the spring limiting ring 1109.

[0076] The water outlet hole 1103 is arranged between the valve plate limiting ring 1108 and the docking ring 1106, and the valve plate 1104 moves between the valve plate limiting ring 1108 and the valve cap 1101 to control the opening and closing of the water outlet hole 1103;

[0077] The valve cap 1101 is detachably connected to the docking ring 1106 , for example, the valve cap 1101 and the docking ring 1106 are detachably connected via threads;

[0078] The existing one-way valve is arranged in the waterway pipe. In order to facilitate water discharge, a water outlet clearance channel is often arranged on the inner wall of the water pipe and around the one-way valve. The existing one-way valve outlet line impacts the clearance channel and then rushes forward along the waterway pipe wall, which not only makes the water discharge difficult but also forms a vortex, resulting in pulsation, which affects the water flow rate and flow rate.

[0079] The one-way valve 11 of the present invention utilizes the space between the support columns 1107 on both sides of the water outlet 1103 as the main flow channel, so that water flows out more smoothly, which is beneficial to improving the water flow rate and flow velocity.

[0080] As a preferred implementation scheme of this embodiment, the top of the crankcase shell 13 is provided with a blind cover 25 arranged on the top of the power shaft placement cavity 16, and the blind cover 25 is connected to the top of the crankcase shell 13 by threads. After the blind cover 25 is removed, it is convenient to maintain the interior of the crankcase shell 13. The power shaft placement cavity 16 is filled with lubricating oil, and the crankcase shell 13 is provided with a refueling port 26 connected to the power shaft placement cavity 16 to facilitate the addition of lubricating oil. When the refueling port 26 is in use, a refueling cap can be set as needed. The refueling port 26 can also be used as an oil drain port for discharging lubricating oil. The number and position of the refueling ports 26 are set according to actual needs.

[0081] As a preferred implementation of this embodiment, Figure 7As shown, the inner wall of the wear-resistant bushing 19 near one end of the power shaft placement cavity 16 is provided with a spiral channel 27 connected to the power shaft placement cavity 16, and the lubricating oil in the power shaft placement cavity 16 can enter the spiral channel 27. The design of the spiral channel 27 increases the contact surface between the piston 2 located in the wear-resistant bushing 19 and the lubricating oil, thereby improving the lubrication effect.

[0082] As a preferred implementation of this embodiment, an overflow channel 28 communicating with the outside is provided in the cavity between the oil seal 20 and the auxiliary water seal 23;

[0083] like Figure 1 and Figure 3 As shown in the figure, a setting mode of an overflow channel 28 is provided, the overflow channel 28 is provided on the high-pressure chamber shell 15, and the overflow channel 28 is connected with the cavity between the oil seal 20 and the auxiliary water seal 23, for example, a hole is provided on the wear-resistant bushing 19 or the auxiliary water seal bracket 21 to connect the overflow channel 28 with the cavity between the oil seal 20 and the auxiliary water seal 23;

[0084] When the plunger 2 reciprocates, internal pressure is generated in the cavity between the oil seal 20 and the auxiliary water seal 23, and the overflow channel 28 is used to relieve pressure and overflow.

[0085] As a preferred implementation scheme of this embodiment, the bottom end of the crankcase shell 13 is provided with an input flange 29 for the motor providing power, which is convenient for installing the power motor.

[0086] As a preferred implementation of this embodiment, Fig. 9 As shown, a keyway hole can be provided at the axis center of one end of the power shaft 1 away from the eccentric shaft 3, and a key is provided on the output shaft of the power motor with a reducer, which can cooperate with the keyway hole in the power shaft 1 to realize the transmission connection between the output shaft of the power motor and the power shaft 1. The provision of the keyway hole also plays a role in reducing the weight of the power shaft 1. The transmission connection method between the power shaft 1 and the power motor includes but is not limited to the aforementioned connection method.

[0087] As a preferred implementation of this embodiment, Fig.10As shown, the secondary water seal bracket 21 is provided with a first water return hole 30 between the main water seal 22 and the secondary water seal 23, the high pressure chamber shell 14 is provided with a water return channel 31, the valve cap 1101 of the one-way valve 11 on the water inlet channel 7 is provided with a second water return hole 32 connected with the water inlet hole 1102, the first water return hole 30, the water return channel 31 and the second water return hole 32 are connected, and on the secondary water seal bracket 21, between the main water seal 22 and the secondary water seal 23, in order to maintain the main water seal lip The lip of the auxiliary water seal and the plunger 2 are lubricated to reduce the clamping force. Water will accumulate between the main water seal 22 and the auxiliary water seal 23. As the number of radial movements of the plunger 2 between the main water seal and the auxiliary water seal increases, more and more water accumulates between the main water seal and the auxiliary water seal, which will generate pressure. Therefore, a return water path composed of a first return water hole 30, a return water channel 31 and a second return water hole 32 is set to allow the increasing water between the main water seal and the auxiliary water seal to flow back to the water inlet hole of the one-way valve on the water inlet channel.

[0088] When the present invention is used in practice, a pressure regulating valve can be arranged at the outlet end of the high-pressure water outlet channel 9 and then connected to an external water outlet pipe. The arrangement of the pressure regulating valve is as follows: Figure 8 As shown, a water inlet joint is provided at the water inlet 6 and connected to an external water supply pipe, a power motor with a reducer is installed on the input flange 29, and its output shaft is connected with the power shaft 1, and water is supplied by the external water supply pipe. The power motor is started, the power shaft 1 rotates, and the eccentric shaft 3 and the bearing 4 thereon drive the plunger 2 to reciprocate. Water absorption and drainage phenomena are continuously formed at both ends of the plunger 2 in the corresponding high-pressure chamber 10. Due to the reciprocating motion of the plunger 2, continuous high-pressure water is discharged in the high-pressure water outlet channel 9. In addition, when the water supplied by the external water supply pipe enters the water-cooling chamber, the lubricating oil in the power shaft placement cavity 16 can be heat-exchanged and cooled, and then the power shaft 1, the plunger 2 and its matching parts are cooled, so as to avoid the problem of high-temperature burning of the pump body and extend the service life.

[0089] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. Double cylinder high pressure water pump, characterized in that: include: Crankcase; The double-cylinder mechanism is installed in the crankcase, and includes a power shaft for power input and rotating around its own axis and a plunger controlled by the power shaft to move back and forth linearly. An eccentric shaft is provided on the top of the power shaft, and a bearing is sleeved on the eccentric shaft. A receiving groove is provided on the bottom side of the middle part of the plunger. The eccentric shaft and the bearing on the eccentric shaft are both arranged in the receiving groove. A channel for moving the plunger and maintaining the orientation is provided on the crankcase, and the two ends of the plunger can move in the channel; A water flow channel is provided on the crankcase, comprising two water inlet channels differentiated from a water inlet, a high-pressure water outlet channel formed by two water outlet channels, and two high-pressure chambers. The two high-pressure chambers are provided on the crankcase and are respectively provided at two end positions of the plunger. The water inlet end of each high-pressure chamber is connected to a water inlet channel, and the water outlet end is connected to a water outlet channel. A one-way valve is provided on each water inlet channel and each water outlet channel. The one-way valve on the water inlet channel controls the water flow to flow only from the water inlet to the high-pressure chamber, and the one-way valve on the water outlet channel controls the water flow to flow only from the high-pressure chamber to the high-pressure water outlet channel. The power shaft rotates, and the reciprocating movement of the plunger is controlled through the eccentric shaft and the bearing on the eccentric shaft. The end of the plunger enters and exits the high-pressure chamber to control the water inlet and outlet of the high-pressure chamber. The end of the plunger is away from the high-pressure chamber, and water enters the high-pressure chamber through the water inlet channel. The end of the plunger enters the high-pressure chamber, and water is discharged from the high-pressure chamber through the water outlet channel.

2. The double-cylinder high-pressure water pump according to claim 1, characterized in that: A water cooling chamber is provided between the water inlet and the two water inlet channels. The water cooling chamber is arranged around the power shaft. The water inlet is arranged on the water cooling chamber. The two water inlet channels are respectively connected to the water cooling chamber. The water cooling chamber is arranged around the power shaft to perform a cooling function.

3. The double-cylinder high-pressure water pump according to claim 2, characterized in that: The crankcase comprises a crankcase shell, two high-pressure chamber shells and a high-pressure water outlet shell, wherein the two high-pressure chamber shells are respectively connected to two sides of the crankcase shell, and the high-pressure water outlet shell is arranged above the crankcase shell and the two ends thereof are respectively connected to a high-pressure chamber shell; The crankcase shell is provided with a power shaft placement cavity, and the crankcase shell is provided with a first plunger channel arranged on both sides of the power shaft placement cavity and connected with the power shaft placement cavity; A high-pressure chamber is arranged in the high-pressure chamber shell, a first water outlet channel is arranged at the water outlet end of the high-pressure chamber, a first water inlet channel is arranged at the water inlet end of the high-pressure chamber, and a second plunger channel for connecting the first plunger channel and the high-pressure chamber is arranged in the high-pressure chamber shell near the crankcase shell side; The plunger can move in the first plunger channel and the second plunger channel. A wear-resistant bushing sleeved on the plunger is fixed in the first plunger channel. An oil seal is provided between the plunger and the end of the wear-resistant bushing away from the power shaft placement cavity. A secondary water seal bracket, a main water seal and a secondary water seal sleeved on the plunger are fixed in the second plunger channel. The main water seal is provided at one end of the secondary water seal bracket close to the high-pressure chamber, and the secondary water seal is provided at one end of the secondary water seal bracket close to the wear-resistant bushing. A high-pressure water outlet channel is arranged in the high-pressure water outlet housing, and the water inlet end of the high-pressure water outlet channel is connected to two second water outlet channels, and the inlet of each second water outlet channel is connected to the corresponding first water outlet channel; The crankcase shell is provided with a second water inlet channel communicating with the water cooling chamber, and the second water inlet channel is communicated with the first water inlet channel; One-way valves are arranged at the entrance of the second water outlet channel on the high-pressure water outlet shell and at the entrance of the first water inlet channel on the high-pressure chamber shell.

4. The double-cylinder high-pressure water pump according to claim 1, 2 or 3, characterized in that: The one-way valve comprises a valve cap and a valve housing, wherein the valve cap is connected to the water inlet end of the valve housing, the valve cap is axially penetrated to form a water inlet hole, a water outlet hole is arranged on the side wall of the valve housing, and a valve plate and a spring are arranged inside the valve housing; The valve housing comprises a docking ring, the valve cap is connected to the docking ring, a plurality of support columns are evenly distributed on the side of the docking ring away from the valve cap, a valve plate limiting ring and a spring limiting ring connected to the support columns are arranged on the inner sides of the plurality of support columns, the diameter of the spring limiting ring is smaller than the diameter of the valve plate limiting ring, the valve plate limiting ring is arranged between the spring limiting ring and the docking ring, the valve plate is arranged between the valve plate limiting ring and the valve cap, the spring is arranged between the spring limiting ring and the valve plate, one end of the spring abuts against the valve plate, and the other end abuts against the spring limiting ring; The water outlet hole is arranged between the valve plate limiting ring and the docking ring. The valve plate moves between the valve plate limiting ring and the valve cap to control the opening and closing of the water outlet hole. The space between two adjacent support columns is connected to the water outlet hole to form a main circulation channel.

5. The double-cylinder high-pressure water pump according to claim 3, characterized in that: The water cooling chamber comprises a water storage ring groove arranged on the outer side of the bottom end of the crankcase shell and a water jacket arranged on the outer side of the water storage ring groove. Sealing rings are arranged between the top and bottom ends of the inner wall of the water jacket and the crankcase shell.

6. The double-cylinder high-pressure water pump according to claim 3, characterized in that: The power shaft is arranged in the power shaft placement cavity, and bearings are arranged between the top end and the bottom end of the power shaft and the inner wall of the power shaft placement cavity; A sealing ring is arranged between the power shaft and the power shaft placement cavity at a position below the bearing at the bottom end of the power shaft.

7. The double-cylinder high-pressure water pump according to claim 6, characterized in that: The top of the crankcase shell is provided with a blind cover arranged on the top of the power shaft placement cavity. The power shaft placement cavity is filled with lubricating oil. The crankcase shell is provided with a refueling port connected with the power shaft placement cavity.

8. The double-cylinder high-pressure water pump according to claim 3, characterized in that: The inner wall of the wear-resistant bushing close to one end of the power shaft placement cavity is provided with a spiral channel connected with the power shaft placement cavity for circulating lubricating oil and increasing lubrication.

9. The double-cylinder high-pressure water pump according to claim 3, characterized in that: An overflow channel communicating with the outside is provided in the cavity between the oil seal and the auxiliary water seal.

10. The double-cylinder high-pressure water pump according to claim 4, characterized in that: A first return water hole is provided on the secondary water seal bracket between the main water seal and the secondary water seal, a return water channel is provided on the high-pressure chamber shell, a second return water hole connected to the water inlet hole is provided on the valve cap of the one-way valve on the water inlet channel, and the first return water hole, the return water channel and the second return water hole are connected.

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