CN212508794U

CN212508794U - Cam rotor pump

Info

Publication number: CN212508794U
Application number: CN202021803092.4U
Authority: CN
Inventors: 张永胜; 姜春明
Original assignee: Liaoning Hengxing Pump Industry Co ltd
Current assignee: Liaoning Hengxing Pump Industry Co ltd
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2021-02-09
Anticipated expiration: 2030-08-26

Abstract

The utility model discloses cam rotor pump, including the pump body, pump cover, driving shaft, driven shaft, transmission case, initiative cam rotor, driving shaft bearing device, driving gear, driving shaft left end antifriction bearing, driving shaft sealing ring, driven cam rotor, driven shaft bearing device, driven gear, driven shaft left end antifriction bearing, driven shaft sealing ring, characterized by set up the first recess pressure relief groove (A) that leads to pump body feed liquor chamber on the right side of pump cover (2) and initiative cam rotor (30) and pump body (1) complex terminal surface; set up second recess pressure release groove (B) that accesss to pump body feed liquor chamber on the right side of pump cover (2) and driven cam rotor (40) and pump body (1) complex terminal surface, make sealing ring right side chamber (Q1, Q2) and pump body feed liquor chamber communicate with each other, the pressure release backward flow guarantees that the medium can not lead to the sealing ring and enters into left end antifriction bearing in, guarantees good lubrication condition and life of driving shaft left end antifriction bearing and driven shaft left end antifriction bearing.

Description

Cam rotor pump

Technical Field

The utility model relates to a cam rotor pump.

Background

The cam rotor pump comprises a pump body, a pump cover, a driving shaft, a driven shaft, a transmission case, a driving cam rotor, a driving shaft bearing device, a driving gear, a driving shaft mechanical seal, a driven cam rotor, a driven shaft bearing device, a driven gear and a driven shaft mechanical seal; the left end of the pump body is fixedly connected with the pump cover in a butt joint mode through bolts, and the right end of the pump body is fixedly connected with the transmission case in a butt joint mode through bolts.

Above-mentioned prior art cam rotor pump, the left end antifriction bearing of its driving shaft and driven shaft sets up on the pump cover, be equipped with the sealing ring in the inboard bearing housing hole of this left end antifriction bearing, this sealing ring and driving shaft and driven shaft axle sleeve sliding fit, be equipped with 0 shape rubber seal between the fitting surface of sealing ring inner ring face and driving shaft and driven shaft axle sleeve, seal and cut off the intercommunication in left end antifriction bearing chamber and pump cover right side cam rotor chamber, prevent that the medium in the pump chamber from entering into the left end antifriction bearing intracavity, cause left end rolling shaft lubricated badly, damage with higher speed, the life of pump has been reduced.

However, when the working condition pressure of the cam rotor pump is high, the 0-shaped rubber sealing ring arranged between the inner ring surface of the sealing ring and the matching surface of the shaft sleeve cannot bear the high pressure, axial leakage is easy to generate, a medium in the pump cavity enters the left-end rolling bearing cavity, the left-end rolling bearing is poor in lubrication, the left-end rolling bearing is damaged in an accelerated mode, and the service life of the pump is shortened.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a cam rotor pump to overcome above-mentioned prior art not enough.

The utility model discloses a cam rotor pump, including the pump body, the pump cover, the driving shaft, the driven shaft, the transmission case, install the initiative cam rotor on the driving shaft, install the driving shaft bearing device in the transmission case, install the driving gear on the driving shaft in the transmission case, install the driving shaft left end antifriction bearing in the pump cover, install the driving shaft sealing ring in the inboard bearing housing hole of driving shaft left end antifriction bearing, install the driving shaft mechanical seal in driving shaft and pump body initiative shaft cavity cover; the pump comprises a driven cam rotor arranged on a driven shaft, a driven shaft bearing device arranged in a transmission box, a driven gear arranged on the driven shaft in the transmission box, a driven shaft left end rolling bearing arranged in a pump cover, a driven shaft sealing ring arranged in a bearing seat hole on the inner side of the driven shaft left end rolling bearing, and a driven shaft mechanical seal arranged in a driven shaft cavity sleeve of a driven shaft and a pump body; the pump body left end passes through bolt fastening butt joint with the pump cover, and the pump body right-hand member passes through bolt fastening butt joint with the transmission case, characterized by:

a first groove pressure relief groove A communicated with a pump body liquid inlet cavity is formed in the stepped end face, matched with the driving cam rotor 30 and the pump body 1, of the right side of the pump cover 2; and a second groove pressure relief groove B leading to a pump body liquid inlet cavity is formed in the stepped end face, matched with the driven cam rotor 40 and the pump body 1, on the right side of the pump cover 2.

The utility model discloses a first recess pressure relief groove A and second recess pressure relief groove B, make driving shaft left end antifriction bearing's 34 right side chamber Q1 of driving shaft sealing ring and driven shaft left end antifriction bearing's 44 right side chamber Q2 communicate with the pump body feed liquor chamber respectively and link to each other. When the cam rotor pump works, particularly when the pressure of the pump is high under working conditions, a medium which leaks into the right cavity Q1 of the driving shaft sealing ring 34 and the right cavity Q2 of the driven shaft sealing ring 44 from the pump liquid outlet end, namely a high-pressure end, through matching surfaces of the pump shaft and the rotor as well as the pump cover and the rotor is subjected to pressure relief and backflow to the pump liquid inlet end, namely a low-pressure end, so that the medium is prevented from entering the driving shaft left end rolling bearing 33 and the driven shaft left end rolling bearing 43 through the driving shaft sealing ring 34 and the driven shaft sealing ring 44, and good lubrication conditions and service life of the driving shaft left end rolling bearing 33 and.

The utility model discloses simple structure implements simple and conveniently.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a cross-sectional view of the pump cap of fig. 1.

Fig. 3 is a right side view of fig. 2.

Detailed Description

The utility model discloses a cam rotor pump, including the pump body 1, the pump cover 2, the driving shaft 3, the driven shaft 4, the transmission case 5, install initiative cam rotor 30 on the driving shaft, install initiative shaft bearing device 31 in the transmission case, install initiative gear 3 on the driving shaft in the transmission case, install initiative shaft left end antifriction bearing 33 in the pump cover 2, install initiative shaft sealing ring 34 in the inboard bearing seat hole of initiative shaft left end antifriction bearing, install initiative shaft mechanical seal 35 in the cavity cover of initiative shaft of driving shaft and pump body, install the driven cam rotor 40 on the driven shaft, install the driven shaft bearing device 41 in the transmission case, install driven gear 42 on the driven shaft in the transmission case, install the left end antifriction bearing 43 in the pump cover 2, install the driven shaft sealing ring 44 in the inboard bearing seat hole of driven shaft left end antifriction bearing, a driven shaft mechanical seal 45 arranged in the cavity sleeve of the driven shaft and the driven shaft of the pump body; the left end of the pump body 1 is fixedly connected with the pump cover 2 in a butt joint mode through bolts, and the right end of the pump body 1 is fixedly connected with the transmission case 5 in a butt joint mode through bolts; a first groove pressure relief groove A is formed in the stepped end face, matched with the driving cam rotor 30 and the pump body 1, of the right side of the pump cover 2 and communicated with a pump body liquid inlet cavity; and a second groove pressure relief groove B is formed in the stepped end face, matched with the driven cam rotor 40 and the pump body 1, at the left end of the pump cover 2 and communicated with a pump body liquid inlet cavity.

Claims

1. The cam rotor pump comprises a pump body, a pump cover, a driving shaft, a driven shaft, a transmission case, a driving cam rotor arranged on the driving shaft, a driving shaft bearing device arranged in the transmission case, a driving gear arranged on the driving shaft in the transmission case, a driving shaft left end rolling bearing arranged in the pump cover, a driving shaft sealing ring arranged in a bearing seat hole on the inner side of the driving shaft left end rolling bearing, and a driving shaft mechanical seal arranged in a cavity sleeve of the driving shaft and the driving shaft of the pump body; the pump comprises a driven cam rotor arranged on a driven shaft, a driven shaft bearing device arranged in a transmission box, a driven gear arranged on the driven shaft in the transmission box, a driven shaft left end rolling bearing arranged in a pump cover, a driven shaft sealing ring arranged in a bearing seat hole on the inner side of the driven shaft left end rolling bearing, and a driven shaft mechanical seal arranged in a driven shaft cavity sleeve of a driven shaft and a pump body; the pump body left end passes through bolt fastening butt joint with the pump cover, and the pump body right-hand member passes through bolt fastening butt joint with the transmission case, characterized by:

a first groove pressure relief groove (A) communicated with a pump body liquid inlet cavity is formed in the end face, matched with the driving cam rotor (30) and the pump body (1), of the right side of the pump cover (2);

and a second groove pressure relief groove (B) communicated with the pump body liquid inlet cavity is formed in the end surface, matched with the driven cam rotor (40) and the pump body (1), of the right side of the pump cover (2).