CN2198459Y

CN2198459Y - Seal structure between pump and screw plunger end

Info

Publication number: CN2198459Y
Application number: CN 94219576
Authority: CN
Inventors: 金久勇
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-08-27
Filing date: 1994-08-27
Publication date: 1995-05-24
Anticipated expiration: 2004-08-27

Abstract

The utility model relates to an end face seal structure, particularly a seal structure between the pump body of the oil transfer pump of a diesel and the end face of a screw plug. The seal structure comprises a pump body connected by threads and a screw plug; the end face of the pump body is provided with an end face inner ring groove; the outer thread of the screw plug adjacent to the screw plug cap portion is provided with a wide run-off groove; an elastic rubber seal ring is arranged in a rectangular ring groove formed between the wide run-off groove and the end face inner ring groove. Thus, the seal effect is enhanced; simultaneously, the processing and assembly precision requirements of parts mutually matched with the seal element can be decreased; the cost is lowered.

Description

Seal structure between pump and screw plunger end

The utility model relates to a kind of end face seal structure, especially refers to the pump housing of oil transmitting pump of diesel engine and the sealing configuration of plug screw end face.

At present, it between the pump housing of existing oil transfer pump and plug screw end face the interlocking copper washer, screw thread at the pump housing and plug screw connects under the pressure, make copper washer produce resiliently deformable, the seal action of the oil leakage between the compensation scyewed joint, but, because the copper washer axial deflection is very little, the loosening grade that the nonparallelism of the pump housing and plug screw end face machining error and assembling and external force cause plug screw to connect produces the interior oil leakage of pump body, often be difficult to the sealing effect that reaches good, in addition, the copper washer of the distortion after compressing, the dismounting back is difficult to restore to the original state.

The purpose of this utility model provides the sealing configuration between a kind of pump housing and plug screw end face, is pressed between the pump housing and the plug screw end face with the elastic seal ring of circular cross-section, strengthens sealing, also reduces cost.

The purpose of this utility model is achieved in that a kind of pump housing and sealing configuration between the plug screw end face comprise with the pump housing and the plug screw that are threaded, it is characterized in that: the end face of the pump housing is provided with the end face inner groove, the outside thread of plug screw is provided with wide tool withdrawal groove near plug screw cap place, in the rectangle annular groove that forms between wide tool withdrawal groove and end face inner groove an elastic seal ring is set.

Above-mentioned elastic seal ring is circle or rectangle, the prismatic rubber seal of U-shaped.

Owing to adopt such scheme: improve sealing effect, also can reduce the processing of part in addition and the assembly precision requirement that match with Sealing simultaneously, cost reduces.

Below in conjunction with drawings and Examples the utility model is further specified.

The part sectioned view of Fig. 1 the utility model exemplary embodiments.

Among the figure: 1, the pump housing 11, end face inner groove 2, plug screw 21, plug screw cap 22, wide tool withdrawal groove 3, elastic seal ring

As shown in fig. 1, the end face portion of the pump housing 1 has internal thread and at its end face end face inner groove 11 is set, plug screw 2 has the outside thread on plug screw cap 21, the plug screw, and outside thread is provided with wide tool withdrawal groove 22 near plug screw cap 21 places, this plug screw 2 closely is connected with the pump housing 1 internal thread with outside thread on it, and the adjusting scyewed joint makes wide tool withdrawal groove 22 left side walls align in one plane with end face inner groove 11 diapires, thereby forms the rectangle annular groove that has only a narrow annulus.

Elastic seal ring 3 is circle, rectangle, the prismatic rubber seal of U-shaped (" O " RunddichtringO), and be arranged in the rectangle annular groove of wide tool withdrawal groove 22 and end face inner groove 11 formations, under the axial pressure of the scyewed joint of the pump housing 1 and plug screw 2, make round and elastic seal ring 3 section deformations (shown in Fig. 1), closely contact the end face of scyewed joint, make the pressure oil in the pump housing 1 be difficult for from scyewed joint, leaking out, guaranteed excellent sealing performance, also can also reduce simultaneously processing and assembly precision, thereby reduce cost about other part.

Claims

1, a kind of pump housing comprises with the pump housing and the plug screw that are threaded with sealing configuration between the plug screw end face, it is characterized in that: the end face of the pump housing is provided with the end face inner groove, the outside thread of plug screw is provided with wide tool withdrawal groove near plug screw cap place, in the rectangle annular groove that forms between wide tool withdrawal groove and end face inner groove an elastic seal ring is set.

2, by the sealing configuration between the described pump housing of claim 1 and plug screw end face, it is characterized in that: above-mentioned elastic seal ring is circle or rectangle, the prismatic rubber seal of U-shaped.