CN201347853Y

CN201347853Y - Sealing device for intermediate rod of drill pump

Info

Publication number: CN201347853Y
Application number: CNU2009200187741U
Authority: CN
Inventors: 高玉珂; ***
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-02-01
Filing date: 2009-02-01
Publication date: 2009-11-18
Anticipated expiration: 2019-02-01

Abstract

The utility model discloses a sealing device for an intermediate rod of a drill pump. The device comprises a seal box (2) fixed on a pump body (1); and an unloading hole (6) is formed at the lower part of the seal box (2). The device is characterized in that a seal ring (3) is arranged between the seal box (2) and an intermediate rod (4); the two ends of the section of the seal ring (3) are in the shape of Y, a lug boss is arranged in the middle of the outer surface thereof, and a groove is formed in the middle of the inner surface thereof; and the outer end surface of the seal ring (3) is positioned in the axial direction through a retainer ring (5). By replacing the prior seal device of the complex combined structure of a double-framework oil seal, a spacer sleeve and an O-shaped seal ring with an integral seal ring, the device has the advantages that the problems of the prior structure are overcome; the problems are as follows: the prior structure is provided with a crosshead, the intermediate rod moves downwards because of the abrasion of a guide plate, the oil seal ring cannot follow the displacement, and leakage is caused by invalidated sealing; and the utility model can improve the seal reliability by 20% to 25%, and save the seal cost by 15% to 20% under the same use conditions.

Description

A kind of drilling pump Jie rod seal device

Technical field

The utility model belongs to a kind of seal arrangement of shaft element, and definite saying is a kind of drilling pump Jie rod seal device.

Background technique

For the sealing of the reciprocating Jie's bar of drilling pump, two big classes are generally arranged at present, a class is the seal arrangement of the bellow type of SL series, and is effectively reliable.Another kind of is F series drilling pump, adopts two outside framework oil seals to add the complicated sealing configuration of separation sleeve and O-ring seals, and the bar that causes being situated between after original structure crosshead, the guide plate wearing and tearing moves down, and its oil seal washer can not be followed displacement, and seal failure forms leaks.In order to solve the leakage problem of F series drilling pump, designer of the present utility model has done research in earnest, has proposed goal of the invention of the present utility model.

Summary of the invention

Goal of the invention of the present utility model is to put forward for the problem that overcomes the seal leakage that present F series drilling pump exists.A kind of drilling pump Jie rod seal device promptly is provided.

Technical solution of the present utility model is to realize like this, this kind drilling pump Jie rod seal device, has a sealing case [2] that is fixed on the pump housing [1], has a unloading hole [6] in the bottom of sealing case [2], it is characterized in that having in the seal groove between sealing case [2] and Jie's bar [4] cross section is that two ends are Y shapes, the centre of outer surface has a boss, and the centre of internal surface has the seal ring [3] of a groove, and the exterior edge face of sealing circle [3] is by back-up ring [5] axially locating.

Beneficial technical effects of the present utility model is: the seal ring by an integral form replaces original two outside framework oil seals to add the seal arrangement of the complex combination structure of separation sleeve and O-ring seals, after Jie's bar moves down owing to wearing and tearing cause, the y-shaped ring lip can be followed the compensation of Jie's bar by resiliently deformable, does not influence sealing effect.Under same service condition, can improve sealing reliability 20%-25%, save sealing cost 15%-20%.

Description of drawings

Accompanying drawing is a cross-section structure view of the present utility model.Sequence number in the accompanying drawings is described as: 1, the pump housing, 2, sealing case, 3, seal ring, 4, Jie's bar, 5, back-up ring, 6, unloading hole.

Embodiment

Below in conjunction with the embodiment who provides in the accompanying drawing, structure of the present utility model and use are elaborated.With reference to accompanying drawing, this kind drilling pump Jie rod seal device, has a sealing case [2] that is fixed on the pump housing [1], has a unloading hole [6] in the bottom of sealing case [2], it is characterized in that having in the seal groove between sealing case [2] and Jie's bar [4] cross section is that two ends are Y shapes, the centre of outer surface has a boss, and the centre of internal surface has the seal ring [3] of a groove, and the exterior edge face of sealing circle [3] is by back-up ring [5] axially locating.Seal ring adopts the material of good springiness oil resistant.The Y type sealing at two ends closely contacts with the sealing case wall with the external diameter of Jie's bar, particularly the pump case the inside is that part of, the boss of the external diameter circumferential surface of the internal diameter of sealing case and sealing gasket forms another sealing surface, because the pressure at reciprocating frequency and Jie's bar place is all not high, one minute the highest also dashes with regard to 100-150, even such structure has a spot of oil leak to go over, also can reflux in the pump housing through the unloading hole of the gap between Y shape sealing and the boss, reduced leakage rate, the sealing that like this, has just guaranteed F series drilling pump to-and-fro motion Jie bar effectively is reliable, effectively.

Claims

1, a kind of drilling pump Jie rod seal device, has the sealing case [2] that is fixed on the pump housing [1], has a unloading hole [6] in the bottom of sealing case [2], it is characterized in that having in the seal groove between sealing case [2] and Jie's bar [4] cross section is that two ends are Y shapes, the centre of outer surface has a boss, and the centre of internal surface has the seal ring [3] of a groove.