CN-224214381-U - Flexible impeller type sea water pump for ship machine

CN224214381UCN 224214381 UCN224214381 UCN 224214381UCN-224214381-U

Abstract

The utility model provides a flexible impeller type sea water pump for a ship machine, which relates to the technical field of sea water pumps and comprises a pump body, a water inlet and a water outlet, wherein a working cavity and a transmission cavity are formed in the pump body; the pump comprises a pump shaft, an eccentric block, an impeller assembly, a matching part and an impeller assembly, wherein the pump shaft comprises a first section positioned in a working cavity and a second section penetrating through a transmission cavity and extending out of the transmission cavity, the eccentric block protrudes radially inwards from the inner wall of the working cavity, the impeller assembly is sleeved on the first section and rotates along with the pump shaft to match with the eccentric block so as to scratch seawater from a water inlet to a water outlet, one end, far away from the second section, of the impeller assembly is provided with the matching part, and the matching part is suitable for enabling the impeller assembly to translate along the axial direction of the pump shaft under the matching of an external tool so as to enable the impeller assembly to be separated from the pump shaft.

Inventors

HE WENQIANG
ZU BINGFENG
LIU NIAN
LI YUNFENG
WANG JINGCHENG

Assignees

天津内燃机研究所（天津摩托车技术中心）
无锡天内科技发展有限公司

Dates

Publication Date: 20260508
Application Date: 20250513

Claims (10)

1. A flexible impeller type sea water pump for a ship machine, comprising: The pump body is internally provided with a working cavity and a transmission cavity, and a water inlet and a water outlet which are communicated with the working cavity; a pump shaft including a first section located within the working chamber and a second section passing through and extending from the drive chamber; an eccentric block protruding radially inward from an inner wall of the working chamber; the impeller assembly is sleeved on the first section and rotates along with the pump shaft to match with the eccentric block so as to scratch seawater from the water inlet to the water outlet, and one end, far away from the second section, of the impeller assembly is provided with a matching part which is suitable for enabling the impeller assembly to translate along the axial direction of the pump shaft under the matching of an external tool so as to enable the impeller assembly to be separated from the pump shaft.
2. The flexible impeller type sea water pump for ship machine according to claim 1, wherein the engaging portion is of an internal thread structure, and the tool has an external thread which is screw-engaged with the internal thread structure.
3. The flexible impeller sea water pump of claim 1 or 2, wherein the first length of the first section is less than the second length of the impeller assembly in the axial direction of the pump shaft.
4. The flexible impeller seawater pump of claim 1 or 2 wherein the impeller assembly comprises: The framework is sleeved outside the pump shaft; the blades are uniformly distributed along the circumferential direction of the framework; The mating portion is formed at an end of the skeleton remote from the second section.
5. The flexible impeller sea water pump for a ship's propulsion machine of claim 4, further comprising: The gasket is constructed into an annular structure and is arranged between the transmission cavity and the working cavity, and a gap is reserved between the gasket and the pump shaft; The water seal unit is sleeved on one side of the pump shaft, which is away from the gasket; The two ends of the skeleton in the axial direction form a first channel and a second channel which extend in the radial direction, seawater flows into a space surrounded by the skeleton, the pump shaft and the pump body from the first channel, and the seawater flows through the gap from the second channel to be contacted with the water seal unit so as to balance the pressure at the two ends of the skeleton.
6. The flexible impeller type seawater pump for a ship machine according to claim 1 or 2, wherein an opening is formed at a side of the working chamber away from the transmission chamber, the flexible impeller type seawater pump for a ship machine further comprising: The pump comprises a pump body, a cover body, a pump cover and a pump cover, wherein the cover body is detachably covered on the opening to limit the position of the impeller assembly relative to the pump shaft in the axial direction of the pump shaft when the cover body is connected with the pump body, and allow the impeller assembly to translate in the axial direction when the cover body is separated from the pump body.
7. The flexible impeller sea water pump for a ship's propulsion according to claim 1, wherein the eccentric block comprises: the first arc core angle of the connecting part, which is close to the first arc surface of the inner wall, is 64-65 degrees; The two transition parts are respectively arranged at two sides of the connecting part, and the two transition parts are respectively configured to gradually enlarge the radius from one side of the connecting part to the side far away from the connecting part.
8. The flexible impeller type sea water pump for ship machine according to claim 7, wherein the second arc center angle of the second arc surface of the eccentric block contacting the working chamber is 176 ° to 184 °.
9. The flexible impeller type sea water pump for ship machine according to claim 1, wherein a screw hole is formed on the eccentric block; And a through hole is formed in the position, opposite to the threaded hole, of the pump body, and a bolt penetrates through the through hole to be in threaded combination with the threaded hole so as to detachably install the eccentric block in the working cavity.
10. The flexible impeller seawater pump of claim 1 wherein further comprising: And the transmission assembly is arranged in the transmission cavity, the pump shaft penetrates through the transmission assembly, and the transmission assembly is configured to allow the pump shaft to rotate relative to the pump body.

Description

Flexible impeller type sea water pump for ship machine Technical Field The utility model relates to the technical field of sea water pumps, in particular to a flexible impeller type sea water pump for a ship machine. Background The small yacht has higher requirements on the whole engine performance, safety, reliability and the like when in marine navigation, and unsafe conditions such as efficiency reduction, lubrication failure, oil consumption increase and the like can occur when the engine of the small yacht is overheated in operation, so the small yacht is particularly important for cooling the engine. The best choice of the cooling medium used by the small-sized ship for the yacht is sea water, however, the sea water contains more solid particles and has stronger corrosiveness, so the cooling medium has higher reliability requirement on cooling equipment. Compared with other pump types, the flexible impeller pump can adapt to the frequent start and stop of the yacht and the working condition of complex environment, and the working medium can use seawater with more solid particles and stronger corrosiveness, and has stable operation and low noise. The common flexible impeller pump has a complex structure, all parts are mutually influenced, and under the condition that a single part is damaged, the flexible impeller pump cannot be quickly and conveniently maintained and replaced, so that the flexible impeller pump has short service life and limited overall efficiency. Disclosure of utility model In view of the above, the utility model provides a flexible impeller type seawater pump for a ship machine, which can be used for rapidly and conveniently disassembling an impeller assembly and prolonging the service life of the flexible impeller type seawater pump for the ship machine. An aspect of the embodiment of the utility model provides a flexible impeller type sea water pump for a ship machine, which is characterized by comprising a pump body, a pump shaft, an eccentric block, an impeller assembly, a coupling part and a coupling part, wherein the pump body is internally provided with a working cavity and a transmission cavity and is provided with a water inlet and a water outlet which are communicated with the working cavity, the pump shaft comprises a first section positioned in the working cavity and a second section penetrating through the transmission cavity and extending out of the transmission cavity, the eccentric block protrudes inwards from the inner wall of the working cavity in a radial direction, the impeller assembly is sleeved on the first section and rotates along with the pump shaft to be coupled with the eccentric block so as to flex sea water from the water inlet to the water outlet, and the coupling part is suitable for enabling the impeller assembly to translate along the axial direction of the pump shaft under the coupling of an external tool so as to separate the impeller assembly from the pump shaft. According to an embodiment of the present utility model, the engaging portion has an internal thread structure, and the tool has an external thread that is screwed with the internal thread structure. According to an embodiment of the utility model, the first length of the first section is smaller than the second length of the impeller assembly in the axial direction of the pump shaft. According to the embodiment of the utility model, the impeller assembly comprises a framework sleeved outside the pump shaft, a plurality of blades uniformly distributed along the circumferential direction of the framework, and the matching part is formed at one end of the framework far away from the second section. According to the embodiment of the utility model, the flexible impeller type sea water pump for the ship machine further comprises a gasket which is constructed into an annular structure and is arranged between the transmission cavity and the working cavity, a gap is formed between the gasket and the pump shaft, a water seal unit is sleeved on one side of the pump shaft, which is far away from the gasket, a first channel and a second channel which extend along the radial direction are formed at two ends of the skeleton in the axial direction, sea water flows into a space surrounded by the skeleton, the pump shaft and the pump body from the first channel, and sea water flows through the gap from the second channel to be contacted with the water seal unit so as to balance the pressure at two ends of the skeleton. According to the embodiment of the utility model, an opening is formed on one side of the working cavity away from the transmission cavity, and the flexible impeller type sea water pump for the ship machine further comprises a cover body, wherein the cover body detachably covers the opening to limit the position of the impeller assembly relative to the pump shaft in the axial direction of the pump shaft when the cover body is connected with the pump body, and allows the impeller assembly